SECURITIES AND EXCHANGE COMMISSION

                            Washington, D.C. 20549


                                   FORM 8-K
                                CURRENT REPORT

                    Pursuant to Section 13 or 15(d) of the
                        Securities Exchange Act of 1934



               Date of Report (Date of earliest event reported):
                               NOVEMBER 12, 1998


                            BOSTON PROPERTIES, INC.
            (Exact name of Registrant as specified in its charter)


 
                                           
     DELAWARE                      1-13087                   04-2473675
(State or other jurisdiction    (Commission File         (I.R.S. Employer
  of incorporation)                 Number)              Identification No.)
 

                              8 ARLINGTON STREET
                          BOSTON, MASSACHUSETTS 02116
             (Address of principal executive offices and zip code)



              Registrant's telephone number, including area code:
                                (617) 859-2600

 
ITEM 2.   ACQUISITION OF ASSETS.

     Acquisition of Interests in Embarcadero Center
     ----------------------------------------------

     On November 12, 1998, Boston Properties, Inc. (the "Company") completed the
first phase of a two-phase acquisition of all of the direct and indirect
interests in a portfolio of Class A office and retail space known collectively
as the "Embarcadero Center" (the "Embarcadero Acquisition").  The Company
anticipates that the second phase will be completed during the first quarter of
1999, although no assurance can be given in this regard.

     The Embarcadero Center is situated on 8.4 acres of waterfront property in
San Francisco's financial district and consists of an aggregate of 3.66 million
square feet of net rentable office space, 354,000 square feet of retail space
and 2,090 underground parking spaces.  The Embarcadero Center consists of six
buildings: 1 Embarcadero Center ("EC1"), 2 Embarcadero Center ("EC2"), 3
Embarcadero Center ("EC3") and 4 Embarcadero Center ("EC4"), Embarcadero Center
West Tower (the "Tower") and the Old Federal Reserve Building.  EC1, EC2, EC3
and EC4 are collectively referred to herein as the "EC Buildings" and each EC
Building, the Tower and The Old Federal Reserve Building is referred to herein
as a "Property."  The Company is acquiring the Embarcadero Center from (i)
certain parties who are affiliated with, or who had co-invested in the
Embarcadero Center with, David Rockefeller and Associates (collectively,
"Rockefeller"); and (ii) The Prudential Insurance Company of America and certain
of its affiliates (collectively, "Prudential"), for approximately $1.233 billion
(including certain closing costs).  This amount may vary due to post-closing
prorations and adjustments that are customary in similar transactions as well as
additional closing and refinancing costs.

     As a result of the closing of the first phase of the Embarcadero
Acquisition (the "Initial Closing"), (i) the Company acquired all of the
interests in the Old Federal Reserve Building for an aggregate consideration of
approximately $39 million (including assumed debt); (ii) the Company acquired
all of the interests in the Tower for an aggregate consideration of
approximately $142 million (including assumed debt and the issuance of preferred
units of limited partnership interest ("Preferred Units") in Boston Properties
Limited Partnership, the operating partnership subsidiary of the Company (the
"Operating Partnership")); and (iii) the Company, through its affiliates,
acquired controlling, managing general partnership interests in the four general
partnerships (the "EC Partnerships") that own the EC Buildings for an aggregate
consideration of approximately $300 million financed through the issuance of
Preferred Units.  After the acquisition of interests in the EC Partnerships, (i)
the Company, through affiliates, owns approximately a 49.98% indirect interest
in EC1, EC3 and EC4 and approximately a 40.00% indirect interest in EC2, (ii)
the EC Partnerships, in the aggregate, have approximately $420 million in non-
property assets (consisting of investment grade securities rated A+ by Standard
& Poor's Corporation and A+ by Fitch IBCA, Inc.) and (iii) the EC Partnerships
have aggregate indebtedness of approximately $1,050 million, consisting of
unsecured indebtedness of approximately $420 million and indebtedness of $630
million 

                                       2

 
secured by mortgages on the EC Buildings.  Prudential is a non-managing
general partner of each of the EC Partnerships.

     Pursuant to certain redemption agreements entered into at the time of the
Initial Closing, Prudential and the Company each has the right to cause the
entire interest of Prudential in each of the EC Partnerships to be redeemed in
full in consideration of (i) a distribution by the EC Partnership to Prudential
of certain partnership assets that are not related to the Embarcadero Buildings
and that are owned by such EC Partnership and (ii) the assumption by Prudential
of certain indebtedness of such EC Partnership. A full redemption of Prudential
from all four EC Partnerships (which would constitute the "second phase" of the
Embarcadero Acquisition) would require the distribution to Prudential of non-
property partnership assets subject to debt having a net value of approximately
$328 million. While there can be no assurance as to when or if Prudential's
interests in the EC Partnerships will be redeemed, the Company expects that the
redemptions will occur during the first quarter of 1999. Following these
redemptions, the Company, through its affiliates, would own all of the interests
in the EC Buildings.

     Upon the Initial Closing, (i) the Company issued approximately $316 million
of Preferred Units, (ii) the Tower was secured by $100 million of indebtedness,
(iii) the Embarcadero Buildings were secured by $630 million of indebtedness
(together with the secured financing on the Tower, the "Secured Financing") and
(iv) the Embarcadero Partnerships had approximately $420 million of financing
not secured by the Properties (the "Unsecured Financing").  Of the $730 million
of Secured Financing, approximately $503 million was used to refinance existing
mortgages encumbering the Properties and approximately $227 million represented
excess financing proceeds ("Excess Financing Proceeds") that were lent by the
Embarcadero Partnerships to the Operating Partnership and used by the Operating
Partnership to support working capital and repay amounts outstanding under its
line of credit with BankBoston, N.A. (the "Line of Credit") (approximately $145
million) and to meet cash requirements in connection with the Initial Closing
(approximately $83 million).  At the completion of the second phase of the
acquisition, $92 million of the Unsecured Financing will be assumed by
Prudential and the remaining Unsecured Financing will be repaid in part and
refinanced in part as a result of (i) the issuance of $100 million of preferred
stock that is expected to be sold to Prudential, as discussed below, and (ii) a
draw by the Company and the EC Partnerships (as co-borrowers) of approximately
$232 million on the Line of Credit (the proceeds of the stock sale and a portion
of the line draw will be used by the Company to repay the Excess Financing
Proceeds to the Embarcadero Partnerships).

     Upon the closing of both phases of the Embarcadero Acquisition, the Company
expects that the transaction (including certain closing costs) will have been
financed as follows: (i) the incurrence of $730 million of Secured Financing
having a weighted average maturity of approximately 8.85 years and a weighted
average fixed interest rate of approximately 6.63%; (ii) the incurrence of
approximately $87 million of unsecured financing under the Company's Line of
Credit; (iii) the issuance of Series Two Preferred Units of the Operating
Partnership,
                                       3

 
having an aggregate liquidation preference of approximately $306 million; (iv)
the issuance of Series Three Preferred Units of the Operating Partnership having
an aggregate liquidation preference of approximately $10 million; and (v) the
issuance of $100 million of the Company's Series A Convertible Redeemable
Preferred Stock (the "Preferred Stock"). Certain of these amounts may vary due
to post-closing prorations and adjustments that are customary in similar
transactions and additional closing and refinancing expenses. The terms of the
Series Two Preferred Units and the Series Three Preferred Units (collectively,
the "Preferred Units") and the Preferred Stock are described below.

     The sources for the Secured Financing were as follows: $320 million
pursuant to a first deed of trust loan with New York Life Insurance Company, The
Equitable Life Assurance Society of the United States and Teachers Assurance and
Annuity Association of America, secured by EC1, EC2 and The Old Federal Reserve
Building; $150 million pursuant to a first deed of trust loan with Connecticut
General Life Insurance Company secured by EC3; $160 million pursuant to a first
deed of trust loan by Northwestern Mutual Life Insurance Company secured by EC4;
and $100 million pursuant to a first deed of trust with Connecticut General Life
Insurance Company and Massachusetts Mutual Life Insurance Company secured by the
Tower.  The source for the Unsecured Financing was as follows: $92 million
pursuant to a 90-day term loan from The Chase Manhattan Bank and $328 million
pursuant to a 90-day Term Loan Agreement with BankBoston, N.A., The Chase
Manhattan Bank, Fleet National Bank, PNC Bank, National Association, Dresdner
Bank AG New York Branch and Grand Cayman Branch, The Bank of New York, Keybank
National Association, and Citizens Bank.

     Agreement to Issue Preferred Stock
     ----------------------------------

     The Preferred Stock will be issued pursuant to a Stock Purchase Agreement,
dated September 28, 1998, between the Company and Prudential (the "Stock
Purchase Agreement"). The Stock Purchase Agreement provides that the sale of the
Preferred Stock to Prudential will occur no later than the 90th day after the
Initial Closing.

     Terms of the Preferred Units and the Preferred Stock
     ----------------------------------------------------

     The Preferred Units and the Preferred Stock (collectively, the "Preferred
Securities") have similar economic terms.  On and after December 31, 2002 (the
"Conversion Date"), the Preferred Securities will be convertible, at the
holder's election, into common stock of the Company (in the case of the
Preferred Stock) or common units of the Operating Partnership (in the case of
the Preferred Units) at a conversion price of $38.10 per common share or unit
(the "Conversion Price").

     Dividends or distributions on the Preferred Securities (the "Ordinary
Preferred Dividend") will be payable quarterly and will accrue at a rate of 5.0%
per annum through March 31, 1999; 5.5% through December 31, 1999; 5.625% through
December 31, 2000; 6.0% through December 31, 2001; 6.5% through December 31,
2002; 7.0% until May 12, 2009; and 6.0% thereafter.  However, if at any time the
quarterly dividends or distributions on 

                                       4

 
the common securities into which a Preferred Security may be converted (the
"Ratchet Dividend") are greater than the Ordinary Preferred Dividend due on such
Preferred Security, then each Preferred Security will receive, in respect of
that quarter, the Ratchet Dividend rather than the lower Ordinary Preferred
Dividend.

     The terms of the Preferred Securities provide that they may be redeemed for
cash in six annual tranches, beginning on May 12, 2009, at the election of the
Company or the holders. In lieu of its right to require an annual redemption of
Preferred Securities, the Company may elect to convert a tranche of Preferred
Securities into common stock (in the case of the Preferred Stock) or common
units (in the case of Preferred Units), provided that at the time of such forced
conversion the weighted average of the closing price of the Company's common
stock during the preceding ten day period exceeds 110% of the Conversion Price.

     Appointment of Richard E. Salomon
     ---------------------------------

     Upon the consummation of the Initial Closing, Richard E. Salomon was
appointed to the Board of Directors.  Mr. Salomon, who advised Rockefeller in
connection with the transactions described in this report, is President of
Spears, Benzak, Salomon & Farrell, an investment advisory firm.

     Forward-looking statements
     --------------------------

     This report contains forward-looking statements within the meaning of the
Federal securities laws.  Forward-looking statements are inherently subject to
risks and uncertainties, many of which cannot be predicted with accuracy.
Agreements that the Company enters into (including with respect to the "second
phase" of the transaction described in this report) may be terminated or
abandoned for a variety of reasons, including a failure by the Company or
another party to an agreement to fulfill all conditions required for
consummation of the agreement.

ITEM 7.   FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS.

(a)  Financial Statements of Assets Acquired:

     Financial statements for the Embarcadero Center will be filed by amendment
     as soon as practicable, but not later than January 26, 1999.

(b)  Pro Forma Financial Information:

     Pro forma financial information will be filed by amendment as soon as
     practicable, but not later than January 26, 1999.

                                       5

 
(c)  Exhibits

     Exhibit No.
     -----------

     99.1 Purchase and Sale Agreement, dated as of November 12, 1998, by and
          between Two Embarcadero Center West and BP OFR LLC.

     99.2 Contribution Agreement, dated as November 12, 1998, by and among the
          Company, the Operating Partnership, Embarcadero Center Investors
          Partnership ("ECIP") and the partners in ECIP listed on Exhibit A
          thereto.

     99.3 Contribution Agreement, dated as of November 12, 1998, by and among
          the Company, the Operating Partnership, Three Embarcadero Center West
          ("Three ECW") and the partners in Three ECW listed on Exhibit A
          thereto.

     99.4 Three ECW Redemption Agreement, dated as of November 12, 1998, by and
          among Three ECW, the Operating Partnership, BP EC West LLC,
          Prudential, PIC Realty Corporation ("PIC") and Prudential Realty
          Securities II, Inc. ("PRS II").

     99.5 Three ECW Property Contribution Agreement, dated as of November 12,
          1998, by and among Three ECW, Prudential, PIC, PRS II, the Operating
          Partnership, the Company and BP EC West LLC.

     99.6 Registration Rights and Lock-Up Agreement, dated November 12, 1998, by
          and among the Company, the Operating Partnership and the Holders named
          therein.

     99.7 Third Amended and Restated Partnership Agreement of One Embarcadero
          Center Venture, dated as of November 12, 1998, by and between Boston
          Properties LLC ("BPLLC"), as managing general partner, BP EC1 Holdings
          LLC ("BP EC1 LLC"), as non-managing general partner, and PIC, as non-
          managing general partner.

     99.8 Third Amended and Restated Partnership Agreement of Embarcadero Center
          Associates, dated as of November 12, 1998, by and between BPLLC, as
          managing general partner, BP EC2 Holdings LLC ("BP EC2 LLC"), as non-
          managing general partner, and PIC, as non-managing general partner.

     99.9 Second Amended and Restated Partnership Agreement of Three Embarcadero
          Center Venture, dated as of November 12, 1998, by and between BPLLC,
          as managing general partner, BP EC3 Holdings LLC ("BP EC3 LLC"), as
          non-managing general partner, and Prudential, as non-managing general
          partner.

                                       6

 
     99.10  Second Amended and Restated Partnership Agreement of Four
            Embarcadero Center Venture, dated as of November 12, 1998, by and
            between BPLLC, as managing general partner, BP EC4 Holdings LLC ("BP
            EC4 LLC"), as non-managing general partner, and Prudential, as non-
            managing general partner.

     99.11  Note Purchase Agreement, dated as of November 12, 1998, by and
            between Prudential Realty Securities, Inc. ("PRS") and One
            Embarcadero Center Venture.

     99.12  Note Purchase Agreement, dated as of November 12, 1998, by and
            between PRS and Embarcadero Center Associates.

     99.13  Note Purchase Agreement, dated as of November 12, 1998, by and
            between PRS and Three Embarcadero Center Venture.

     99.14  Note Purchase Agreement, dated as of November 12, 1998, by and
            between PRS and Four Embarcadero Center Venture.

     99.15  Redemption Agreement, dated as of November 12, 1998, by and among
            One Embarcadero Center Venture, BPLLC, BP EC1 LLC and PIC.

     99.16  Redemption Agreement, dated as of November 12, 1998, by and among
            Embarcadero Center Associates, BPLLC, BP EC2 LLC and PIC.

     99.17  Redemption Agreement, dated as of November 12, 1998, by and among
            Three Embarcadero Center Venture, BPLLC, BP EC3 LLC and Prudential.

     99.18  Redemption Agreement, dated as of November 12, 1998, by and among
            Four Embarcadero Center Venture, BPLLC, BP EC4 LLC and Prudential.

     99.19  Option and Put Agreement, dated as of November 12, 1998, by and
            between One Embarcadero Center Venture and Prudential.

     99.20  Option and Put Agreement, dated as of November 12, 1998, by and
            between Embarcadero Center Associates and Prudential.

     99.21  Option and Put Agreement, dated as of November 12, 1998, by and
            between Three Embarcadero Center Venture and Prudential.

     99.22  Option and Put Agreement, dated as of November 12, 1998, by and
            between Four Embarcadero Center Venture and Prudential.

     99.23  Stock Purchase Agreement, dated as of September 28, 1998, by and
            between the Company and Prudential.

                                       7

 
     99.24  Certificate of Designations for the Series Two Preferred Units,
            dated November 12, 1998.

     99.25  Certificate of Designations for the Series Three Preferred Units,
            dated November 12, 1998.

     99.26  Form of Certificate of Designations for the Series A Preferred
            Stock.

                                       8

 
                              S I G N A T U R E S

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.


Date: November 24, 1998


                              BOSTON PROPERTIES, INC.



                              By: /s/ William J. Wedge
                                  _________________________________
                                  William J. Wedge
                                  Senior Vice President

                                       9

 
                                                                    EXHIBIT 99.1


                          PURCHASE AND SALE AGREEMENT


     THIS PURCHASE AND SALE AGREEMENT (this "AGREEMENT") is made and entered
into as of this 12th day of November, 1998, by and between TWO EMBARCADERO
CENTER WEST, a California limited partnership ("SELLER"), and BP OFR LLC, a
Delaware limited liability company ("BUYER").  This Agreement is hereby
executed, and the transactions described herein are being consummated
concurrently herewith, pursuant to (and in accordance with) that certain Master
Transaction Agreement dated as of September 28, 1998, by and among The
Prudential Insurance Company of America ("PRUDENTIAL"), PIC Realty Corporation,
certain Persons listed on Exhibit A thereto, Fedmark Corporation, Embarcadero
Center Investors Partnership, Pacific Property Services, L.P., Boston Properties
Limited Partnership and Boston Properties, Inc. (the "TRANSACTION AGREEMENT").
All initially capitalized terms used herein without definition shall have the
meanings given such terms in the Transaction Agreement.


                             W I T N E S S E T H:

     In consideration of the mutual covenants and agreements set forth herein,
and for other good and valuable consideration, the receipt and sufficiency of
which are hereby acknowledged by the parties hereto, the parties hereto do
hereby agree as follows:

                         ARTICLE 1 - SALE OF PROPERTY

     Seller is concurrently herewith selling, transferring and assigning, and
Buyer is concurrently herewith purchasing, accepting and assuming, subject to
the terms and conditions stated herein, all of Seller's right, title and
interest in and to the following (herein collectively called the "PROPERTY"):

     1.1  REAL PROPERTY.  That certain real estate located at 400 Sansome
          -------------                                                  
Street, City of San Francisco, County of San Francisco, State of California,
legally described in Exhibit A attached hereto and incorporated herein by this
                     ---------                                                
reference, together with all buildings, improvements and fixtures located
thereon and all rights, privileges and appurtenances pertaining thereto,
including all of Seller's right, title and interest in and to all rights-of-way,
open or proposed streets, alleys, easements, strips or gores of land adjacent
thereto (herein collectively called the "REAL PROPERTY"); and

     1.2  PERSONAL PROPERTY.  All tangible personal property owned by Seller
          -----------------                                                 
(excluding any computer or computer equipment and software owned by Seller or
PPS), located on the Real Property, and used in the ownership, operation and
maintenance of the Real Property, and all books, records and files (excluding
appraisals, budgets, Seller's strategic plans for the Property, marketing
information, submissions relating to Seller's obtaining of corporate
authorization, or other information in the possession or control of Seller or
PPS which is privileged (provided that 



 
inadvertent disclosure shall not constitute a waiver of any privilege)) relating
to the Real Property (herein collectively called the "PERSONAL PROPERTY"); and

     1.3  OTHER PROPERTY RIGHTS.  (a) Seller's interest as "landlord" in all
          ---------------------                                             
Leases (as defined in Subsection 6.3.3); and (b) if and to the extent assignable
                      ----------------                                          
by Seller, (i) all service, supply, maintenance and utility agreements, all
equipment leases and all other agreements relating to the Property that are
described in Exhibit C attached hereto and incorporated herein by this
             ---------                                                
reference, (ii) all licenses, permits and other written authorizations necessary
for the use, operation or ownership of the Real Property or Personal Property
and in Seller's possession or control, and (iii) Seller's interest, if any, in
and to the name "Old Federal Reserve Building," "Federal Reserve Building" or
similar names of the Building (the rights and interests of Seller described in
clauses (a) and (b) hereinabove being herein collectively called the "OTHER
- -----------     ---                                                        
PROPERTY RIGHTS").


                          ARTICLE 2 - PURCHASE PRICE

     The total purchase price paid by Buyer for the purchase of the Property is
the sum of Thirty-Eight Million Eight Hundred Thousand and 00/100 Dollars
($38,800,000.00) in immediately available funds (the "PURCHASE PRICE").
Concurrently herewith, the Buyer is paying to Seller the entire Purchase Price,
subject to the prorations and adjustments as set forth in Article 5 hereof and
- ------- --                                                ---------           
Exhibit V of the Transaction Agreement or as otherwise provided under this
Agreement, plus any other amounts required to be paid by Buyer at Closing
           ----                                                          
hereunder, in immediately available funds by wire transfer as more particularly
set forth in Section 6.2 hereof.
             -----------        


                           ARTICLE 3 - TITLE MATTERS

     3.1  Title to Real Property.  Seller is concurrently herewith conveying,
          ----------------------                                             
and Buyer is concurrently herewith accepting, title to the Property, subject
only to (i) such matters as are visible or apparent on that certain ALTA/ACSM
Survey of Two Embarcadero Center West - Assessors Block 229, Lot 3, San
Francisco, California, prepared by KCA Engineering, Inc., 318 Brannan Street,
San Francisco, California 94107, dated August, 1998 (3 pages), (ii) those
exceptions to title for the Property as are listed on Exhibit D attached hereto,
                                                      ---------                 
(iii) any and all matters created by or on behalf of Buyer or any of its
Affiliates (including, without limitation, any mechanics' liens or other claims
relating to any due diligence inspections or investigations of the Property
performed by or on behalf of Buyer or any of its Affiliates), and (iv) all
matters disclosed to or discovered by Buyer or any of its Affiliates (whether in
connection with their respective due diligence investigations and inspections or
otherwise) prior to the date hereof (collectively, the "PERMITTED EXCEPTIONS").

     3.2  TITLE INSURANCE.  Buyer hereby confirms that, subject to the
          ---------------                                             
satisfaction of all requirements of the Title Company set forth in its
Commitment pertaining to the Real Property, Title Company has agreed to issue to
Buyer an ALTA Owner's Form of Title Insurance Policy 

                                       2

 
(the "OWNER'S TITLE POLICY"), in the amount of the Purchase Price, insuring that
fee simple title to the Real Property is vested in Buyer on the date hereof,
subject only to the matters listed on Exhibit D attached hereto.
                                      ---------                 


              ARTICLE 4 - BUYER'S DUE DILIGENCE/CONDITION OF THE
                             PROPERTY/INDEMNITIES

     4.1  BUYER'S INSPECTIONS AND DUE DILIGENCE.
          ------------------------------------- 

          4.1.1  Due Diligence Approval.  Buyer hereby acknowledges and agrees
                 ----------------------                                       
     that, as of the date of the execution of this Agreement, it has been given
     the full opportunity to review, inspect and investigate all of the Seller's
     files known or made available to Buyer relating to the Property that Buyer
     deems necessary to review (the "DOCUMENTS"), and has had an opportunity to
     conduct a thorough review, investigation, and inspection of the physical
     (including, without limitation, the seismic load bearing capabilities),
     environmental, economic, and legal conditions of the Property, the laws,
     regulations, covenants, conditions, and restrictions affecting or governing
     the use or operation of the Property, the rentable square footage of the
     Property, and all other matters which a prudent Buyer of commercial real
     property should review, inspect or investigate in the course of a due
     diligence review, and Buyer has approved the condition of the Property and
     the results of such review, inspection and investigation.

          4.1.2  Indemnity.  Buyer shall indemnify, protect, defend, and hold
                 ---------                                                   
     harmless Seller from and against any and all claims, demands, causes of
     action, losses, damages and liabilities, including, without limitation,
     personal injuries and property damage, and shall immediately discharge any
     liens and encumbrances, arising out of acts or omissions of Buyer or its
     agents, contractors, or representatives, committed on or about the Property
     in the course of Buyer's due diligence reviews, inspections and
     investigations, including, without limitation, claims, demands, causes of
     action, losses, damages and liabilities on the part of the tenants and
     lessees alleging breach of a Lease as a result of any such Person's acts or
     omissions.

          4.1.3  Survivability.  The terms and provisions of this Section 4.1
                 -------------                                    -----------
     shall survive the Closing.

      4.2 PROPERTY SOLD "AS IS".
          --------------------- 

          4.2.1  "As Is, Where Is, With All Faults".  BUYER ACKNOWLEDGES AND
                 ----------------------------------                         
     AGREES THAT: (i) EXCEPT FOR THE EXCLUDED LIABILITIES, THE PROPERTY IS SOLD,
     AND BUYER ACCEPTS POSSESSION OF THE PROPERTY ON THE DATE HEREOF, "AS IS,
     WHERE IS, WITH ALL FAULTS"; (ii) EXCEPT FOR SELLER'S REPRESENTATIONS AND
     WARRANTIES SET FORTH IN ARTICLE 7 
                             ---------                                          

                                       3

 
     (HEREIN COLLECTIVELY CALLED THE "SELLER'S WARRANTIES"), NONE OF SELLER, ITS
     SALES AGENTS, NOR ANY PARTNER, OFFICER, DIRECTOR, EMPLOYEE, AGENT OR
     ATTORNEY OF SELLER, ITS COUNSEL, BROKER, OR ITS SALES AGENTS, NOR ANY OTHER
     PARTY RELATED IN ANY WAY TO ANY OF THE FOREGOING (ALL OF WHICH PARTIES ARE
     HEREIN COLLECTIVELY CALLED THE "SELLER PARTIES") HAVE OR SHALL BE DEEMED TO
     HAVE MADE ANY VERBAL OR WRITTEN REPRESENTATIONS, WARRANTIES, PROMISES OR
     GUARANTEES (WHETHER EXPRESS, IMPLIED, STATUTORY OR OTHERWISE) TO BUYER WITH
     RESPECT TO THE PROPERTY, ANY MATTER SET FORTH, CONTAINED OR ADDRESSED IN
     ANY DOCUMENTS REVIEWED BY BUYER (INCLUDING, BUT NOT LIMITED TO, THE
     ACCURACY AND COMPLETENESS THEREOF) OR THE RESULTS OF BUYER'S DUE DILIGENCE
     INVESTIGATIONS; AND (iii) BUYER HAS CONFIRMED INDEPENDENTLY ALL INFORMATION
     THAT IT CONSIDERS MATERIAL TO ITS PURCHASE OF THE PROPERTY AND THE
     TRANSACTIONS CONTEMPLATED HEREBY. BUYER SPECIFICALLY ACKNOWLEDGES THAT,
     EXCEPT FOR SELLER'S WARRANTIES, BUYER IS NOT RELYING ON (AND SELLER AND
                                              ---  
     EACH OF THE OTHER SELLER PARTIES DOES HEREBY DISCLAIM AND RENOUNCE) ANY
     REPRESENTATIONS OR WARRANTIES OF ANY KIND OR NATURE WHATSOEVER, WHETHER
     ORAL OR WRITTEN, EXPRESS, IMPLIED, STATUTORY OR OTHERWISE, FROM SELLER OR
     ANY OTHER SELLER PARTIES, AS TO: (1) THE OPERATION OF THE PROPERTY OR THE
     INCOME POTENTIAL, USES, OR MERCHANTABILITY OR FITNESS OF ANY PORTION OF THE
     PROPERTY FOR A PARTICULAR PURPOSE; (2) THE PHYSICAL CONDITION OF THE
     PROPERTY OR THE CONDITION OR SAFETY OF THE PROPERTY OR ANY IMPROVEMENTS
     THEREON; (3) THE PRESENCE OR ABSENCE, LOCATION OR SCOPE OF ANY HAZARDOUS
     MATERIALS IN, AT, OR UNDER THE PROPERTY; (4) THE ACCURACY OF ANY
     STATEMENTS, CALCULATIONS OR CONDITIONS STATED OR SET FORTH IN SELLER'S
     BOOKS AND RECORDS CONCERNING THE PROPERTY OR SET FORTH IN ANY OF SELLER'S
     OFFERING MATERIALS WITH RESPECT TO THE PROPERTY; (5) THE DIMENSIONS OF THE
     PROPERTY OR THE ACCURACY OF ANY FLOOR PLANS, SQUARE FOOTAGE, LEASE
     ABSTRACTS, SKETCHES, REVENUE OR EXPENSE PROJECTIONS RELATED TO THE
     PROPERTY; (6) THE OPERATING PERFORMANCE, THE INCOME AND EXPENSES OF THE
     PROPERTY OR THE ECONOMIC STATUS OF THE PROPERTY; (7) THE ABILITY OF BUYER
     TO OBTAIN ANY AND ALL NECESSARY GOVERNMENTAL APPROVALS OR PERMITS FOR
     BUYER'S INTENDED USE AND DEVELOPMENT OF THE PROPERTY; AND (8) THE LEASING
     STATUS OF THE PROPERTY OR THE INTENTIONS OF ANY PERSONS WITH RESPECT TO THE
     NEGOTIATION AND/OR EXECUTION OF ANY LEASE FOR ANY PORTION OF THE PROPERTY.
     BUYER FURTHER ACKNOWLEDGES AND AGREES THAT, EXCEPT FOR SELLER'S WARRANTIES,
     SELLER IS UNDER NO DUTY TO MAKE ANY AFFIRMATIVE DISCLOSURES OR INQUIRY

                                       4

 
     REGARDING ANY MATTER WHICH MAY BE KNOWN TO SELLER OR ANY SELLER PARTIES.

          4.2.2  Releases and Indemnities.  BUYER'S RELEASE AND INDEMNITY:
                 ------------------------                                 

                 (i)  BUYER HEREBY ASSUMES ALL RISKS WITH RESPECT TO THE
          PROPERTY, KNOWN AND UNKNOWN, SUSPECTED AND UNSUSPECTED, EXCEPTING ONLY
                                                                  --------- ----
          THE EXCLUDED LIABILITIES (AS DEFINED IN SECTION 4.2.2(ii) BELOW).
                                                  -----------------
          EXCEPT AS OTHERWISE EXPRESSLY PROVIDED IN SECTION 4.2.2(ii) BELOW WITH
                                                    ----------------- 
          RESPECT TO EXCLUDED LIABILITIES AND SECTION 4.2.2(iii) BELOW WITH
                                              ------------------
          RESPECT TO SELLER'S WARRANTIES, BUYER AND ITS AGENTS, EMPLOYEES,
          AFFILIATES, SUCCESSORS AND ASSIGNS (COLLECTIVELY, "BUYER PARTIES"),
          SHALL BE SOLELY LIABLE FOR, AND SHALL INDEMNIFY, DEFEND, PROTECT AND
          HOLD HARMLESS SELLER PARTIES FROM ANY AND ALL CLAIMS, DEMANDS, CAUSES
          OF ACTION, LOSSES, LIABILITIES, COSTS AND EXPENSES (INCLUDING
          REASONABLE ATTORNEYS' FEES) AT LAW OR IN EQUITY, KNOWN OR UNKNOWN,
          SUSPECTED OR UNSUSPECTED, RELATING TO BODILY INJURY, DEATH, PROPERTY
          DAMAGE, ECONOMIC LOSS, OR OTHER DAMAGES SUFFERED BY ANY SELLER PARTIES
          ARISING OUT OF OR RELATING TO THE PROPERTY, INCLUDING, WITHOUT
          LIMITATION, THE PHYSICAL, ENVIRONMENTAL, ECONOMIC, LEGAL OR OTHER
          CONDITION OF THE PROPERTY, INCLUDING, WITHOUT LIMITATION, ANY SUCH
          CLAIMS OR LIABILITIES RELATING TO THE PRESENCE, DISCOVERY OR REMOVAL
          OF ANY HAZARDOUS MATERIALS IN, AT, ABOUT OR UNDER THE PROPERTY, OR
          FOR, CONNECTED WITH OR ARISING OUT OF ANY AND ALL CLAIMS OR CAUSES OF
          ACTION BASED UPON CERCLA (COMPREHENSIVE ENVIRONMENTAL RESPONSE,
          COMPENSATION, AND LIABILITY ACT OF 1980, 42 U.S.C. (S)(S)9601 ET SEQ.,
          AS AMENDED BY SARA [SUPERFUND AMENDMENT AND REAUTHORIZATION ACT OF
          1986] AND AS MAY BE FURTHER AMENDED FROM TIME TO TIME), THE RESOURCE
          CONSERVATION AND RECOVERY ACT OF 1976, 42 U.S.C. (S)(S)6901 ET SEQ.,
          OR ANY RELATED CLAIMS OR CAUSES OF ACTION OR ANY OTHER FEDERAL OR
          STATE BASED STATUTORY OR REGULATORY CAUSES OF ACTION FOR ENVIRONMENTAL
          CONTAMINATION AT, IN OR UNDER THE PROPERTY (HEREINAFTER "BUYER-COVERED
          CLAIMS").

               (ii)   NOTWITHSTANDING THE FOREGOING, THE TERM "BUYER-COVERED
          CLAIMS" SHALL EXCLUDE, AND BUYER SHALL NOT ASSUME, ANY AND ALL
          OBLIGATIONS AND LIABILITIES ("EXCLUDED LIABILITIES") ARISING FROM OR
          IN CONNECTION WITH

                                       5

 
          THE USE, OWNERSHIP OR OPERATION OF THE PROPERTY ACCRUING PRIOR TO THE
          CLOSING DATE OTHER THAN (A) OBLIGATIONS AND LIABILITIES ASSUMED IN
          WRITING BY BUYER IN CONNECTION WITH THE LEASES AND/OR CONTRACTS AND
          ALL OTHER OBLIGATIONS AND LIABILITIES THAT THE BUYER EXPRESSLY ASSUMES
          IN WRITING AT OR PRIOR TO THE CLOSING, (B) OBLIGATIONS AND LIABILITIES
          FOR WHICH BUYER HAS RECEIVED A PRORATION CREDIT PURSUANT TO EXHIBIT V
          OF THE MASTER TRANSACTION AGREEMENT, AND (C) OBLIGATIONS AND
          LIABILITIES RELATING IN ANY WAY TO THE PHYSICAL OR ENVIRONMENTAL
          CONDITION OF THE PROPERTY OTHER THAN ANY CLAIMS MADE BY, OR CAUSES OF
          ACTION BROUGHT BY, ANY THIRD PARTY UNRELATED TO BUYER OR ANY OF ITS
          AFFILIATES WHERE THE INJURY OR DAMAGE GIVING RISE TO SUCH CLAIM OR
          CAUSE OF ACTION AROSE OR OCCURRED DURING THE PERIOD PRIOR TO THE
          CLOSING DATE.

               (iii)  BUYER PARTIES EACH HEREBY GENERALLY AND FULLY RELEASE
          SELLER PARTIES FROM ANY AND ALL STATEMENTS OR OPINIONS HERETOFORE
          MADE, OR INFORMATION FURNISHED IN CONNECTION WITH THE TRANSACTION
          CONTEMPLATED BY THIS AGREEMENT, BY THE SELLER PARTIES TO ANY OF THE
          BUYER PARTIES, EXCEPT FOR SELLER'S WARRANTIES; AND FROM ANY AND ALL
          BUYER-COVERED CLAIMS, KNOWN OR UNKNOWN, SUSPECTED OR UNSUSPECTED.

               WITH RESPECT TO THE RELEASES AND WAIVERS CONTAINED IN THIS
          SUBSECTION 4.2.2, BUYER EXPRESSLY WAIVES THE BENEFITS OF SECTION 1542
          ----------------                                                     
          OF THE CALIFORNIA CIVIL CODE, WHICH PROVIDES AS FOLLOWS:

               "A GENERAL RELEASE DOES NOT EXTEND TO CLAIMS WHICH THE CREDITOR
               DOES NOT KNOW OR SUSPECT TO EXIST IN HIS FAVOR AT THE TIME OF
               EXECUTING THE RELEASE, WHICH IF KNOWN BY HIM MUST HAVE MATERIALLY
               AFFECTED HIS SETTLEMENT WITH THE DEBTOR."

               BUYER HAS BEEN ADVISED BY ITS LEGAL COUNSEL AND UNDERSTANDS THE
          SIGNIFICANCE OF THIS WAIVER OF SECTION 1542 RELATING TO UNKNOWN,
          UNSUSPECTED AND CONCEALED CLAIMS. BY ITS INITIALS BELOW, BUYER
          ACKNOWLEDGES THAT IT FULLY UNDERSTANDS, APPRECIATES, AND ACCEPTS ALL
          OF THE TERMS OF THIS SUBSECTION 4.2.2(ii).
                               -------------------- 

                                       6

 
                                         _________________________
                                         Buyer's Initials

               (iv)  NOTWITHSTANDING THE FOREGOING, SELLER SHALL BE SOLELY
          LIABLE FOR, AND SHALL INDEMNIFY, DEFEND, PROTECT AND HOLD HARMLESS
          BUYER OR THE PROPERTY FROM ANY AND ALL CLAIMS, DEMANDS, CAUSES OF
          ACTION, LOSSES, LIABILITIES, COSTS AND EXPENSES (INCLUDING REASONABLE
          ATTORNEYS' FEES) AT LAW OR IN EQUITY, KNOWN OR UNKNOWN, SUSPECTED OR
          UNSUSPECTED, RELATING TO BODILY INJURY, DEATH, PROPERTY DAMAGE,
          ECONOMIC LOSS, OR OTHER DAMAGES SUFFERED BY BUYER OR THE PROPERTY
          ARISING OUT OF OR RELATING TO THE EXCLUDED LIABILITIES.

          4.2.3  Definition of Hazardous Materials.  For purposes of this
                 ---------------------------------                       
     Agreement, the term "HAZARDOUS MATERIAL" shall mean any substance,
     chemical, waste or material that is or becomes regulated by any federal,
     state or local governmental authority because of its toxicity,
     infectiousness, radioactivity, explosiveness, ignitability, corrosiveness
     or reactivity, including, without limitation, asbestos or any substance
     containing more than 0.1 percent asbestos, the group of compounds known as
     polychlorinated biphenyls, flammable explosives, oil, petroleum or any
     refined petroleum product.

          4.2.4  Provisions Material.  Buyer acknowledges and agrees that the
                 -------------------                                         
     provisions of this Article 4 were a material factor in Seller's acceptance
                        ---------                                              
     of the Purchase Price and, while Seller has made the Documents available to
     Buyer and cooperated with Buyer in its due diligence investigations and
     inspections, Seller is unwilling to sell the Property unless Seller and the
     other Seller Parties are expressly released as set forth in Subsection
                                                                 ----------
     4.2.2.
     ----- 

          4.2.5  Survivability. Notwithstanding anything to the contrary herein,
                 -------------        
     the provisions of this Section 4.2 shall survive the Closing and shall not
                            -----------                                        
     be merged in any conveyance of the Property.

             ARTICLE 5 -  PRORATIONS, APPORTIONMENTS AND CREDITS;
                                 CLOSING COSTS

     5.1  PRORATION/APPORTIONMENT CREDITS.  The Purchase Price shall be adjusted
          -------------------------------                                       
to reflect the prorations and other adjustments made pursuant to and as provided
in Exhibit V of the Transaction Agreement.

     5.2  DELAYED ADJUSTMENT.  If at any time following the Closing, the amount
          ------------------                                                   
of an item listed in Exhibit V of the Transaction Agreement shall prove to be
incorrect (whether as a result of an error in calculation or a lack of complete
and accurate information as of the Closing), the party in whose favor the error
was made shall promptly pay to the other party the sum necessary 

                                       7

 
to correct such error upon receipt of proof of such error in accordance with the
terms and provisions of Exhibit V of the Transaction Agreement, but only if the
claim is made within the time periods provided in said Exhibit V.

     5.3  CLOSING COSTS.  Seller and Buyer shall bear certain Closing costs of
          -------------                                                       
the transactions contemplated hereby as set forth in Section 10.3 and Exhibit V
of the Transaction Agreement. Notwithstanding anything to the contrary set forth
in the Transaction Agreement, Buyer shall pay all costs of all endorsements to
the Owner's Title Policy (other than title curative endorsements purchased and
paid for by Seller pursuant to Section 8.3 of the Transaction Agreement and
except as otherwise expressly provided in Exhibit V of the Master Transaction
Agreement).  Except as otherwise agreed by the parties, each party shall pay its
own attorneys' fees and costs and the costs and expenses of its own engineering,
environmental and other consultants as provided in the Transaction Agreement.
Any other Closing costs not covered herein or in Section 10.3 or Exhibit V of
the Transaction Agreement shall be allocated between the parties in accordance
with the local practice and custom in San Francisco, California.

     5.4  SURVIVABILITY.  The provisions of this Article 5 shall survive the
          -------------                          ---------                  
Closing and not be merged therein for a period of six (6) months after the
Closing Date or such longer period as may be necessary to complete the Final
Audit and make the adjustment described in Section 5.2 above.
                                           -----------       

                              ARTICLE 6 - CLOSING

     6.1  CLOSING.  As used herein, the term "CLOSING" shall mean the
          -------                                                    
consummation of all transactions contemplated in this Agreement, including,
without limitation, the recordation of the Deed (as defined below) in the
Official Records of San Francisco County, California, and the term "CLOSING
DATE" shall mean the date upon which the Closing occurs.

     6.2  TITLE TRANSFER AND PAYMENT OF PURCHASE PRICE.  On the date hereof,
          --------------------------------------------                      
Seller is conveying title to the Real Property to Buyer by grant deed (provided
such transfer will be consummated only upon confirmation of receipt of the
Purchase Price by the Escrow Agent as set forth below), and Buyer is delivering
the payment specified in Article 2 by timely delivering the same in immediately
                         ---------                                             
available funds to the Escrow Agent.

     6.3  SELLER'S CLOSING DELIVERIES.  Concurrently herewith on the date
          ---------------------------                                    
hereof, Seller is delivering to Buyer, or has caused to be delivered to the
Escrow Agent, the following:

          6.3.1  Deed. A grant deed in the form of Exhibit E attached hereto and
                 ----                              ---------                    
     incorporated herein by this reference, conveying to Buyer all of Seller's
     right, title and interest in and to the Real Property, subject only to the
     Permitted Exceptions ("DEED").

                                       8

 
          6.3.2 Bill of Sale.  A bill of sale in the form of Exhibit F attached
                ------------                                 ---------         
     hereto and incorporated herein by this reference, conveying to Buyer all of
     Seller's right, title and interest in and to the Personal Property.

         6.3.3  Assignment of Tenant Leases.  An assignment and assumption of
                ---------------------------                                  
     leases, in the form of Exhibit G attached hereto and incorporated herein by
                            ---------                                           
     this reference ("ASSIGNMENT OF LEASES"), transferring to Buyer all of
     Seller's interest in the Leases encumbering the Property on the date hereof
     described in Exhibit H attached hereto and incorporated herein by this
                  ---------                                                
     reference and any amendments, guarantees and other documents relating
     thereto (herein collectively called the "LEASES"), together with all
     assignable non-cash security deposits deposited by the tenants thereunder
     and not applied by Seller in accordance with the terms of such Leases.

          6.3.4 Assignment of Equipment Leases and Service Contracts.  An
                ----------------------------------------------------     
     assignment and assumption of equipment leases, service contracts,
     warranties and guaranties and the Other Property Rights (to the extent the
     same are not transferred by the Deed, Bill of Sale or Assignment of Leases)
     in the form of Exhibit I attached hereto and incorporated herein by this
                    ---------                                                
     reference ("ASSIGNMENT OF CONTRACTS"), transferring to Buyer, to the extent
     assignable, without liability or expense to Seller, all of Seller's
     interest in the equipment leases in effect at the Property on the date
     hereof, all contracts described on Exhibit C, all warranties and guaranties
                                        ---------                               
     which remain in effect on the date hereof and any Other Property Rights not
     otherwise transferred to Buyer (all of the foregoing being herein
     collectively called the "ASSIGNED CONTRACTS").  Seller shall not assign any
     existing policies of insurance for the Property, and Seller shall terminate
     the management agreement for the Property on or before the Closing Date.

          6.3.5 Notice to Tenants.  A single form letter in the form of Exhibit
                -----------------                                       -------
     J attached hereto and incorporated herein by this reference to each tenant
     -                                                                         
     under the Leases, duplicate copies of which will be sent on or promptly
     after the date hereof notifying it of the sale of the Property to Buyer and
     advising it that all future payments of rent and other payments due under
     the Leases are to be made to Buyer at an address designated by Buyer in
     such letter.

          6.3.6 Non-Foreign Status Affidavit.  A non-foreign status affidavit in
                ----------------------------                                    
     the form of Exhibit K attached hereto and incorporated herein by this
                 ---------                                                
     reference, as required by Section 1445 of the Internal Revenue Code.

          6.3.7 Evidence of Authority.  A certificate of each general partner of
                ---------------------                                           
     Seller with respect to the authority to act on behalf of Seller to execute
     all documents contemplated by this Agreement and the authority of the
     individuals executing on behalf of Seller.

          6.3.8 Property Documents.  (i) To the extent in the possession of
                ------------------                                         
     Seller or PPS, (x) the original (or, if unavailable, a copy) of the
     existing certificate or certificates of 

                                       9

 
     occupancy for the Property, and (y) all originals (or, if unavailable,
     copies of) certificates, licenses, permits, authorizations and approvals
     issued for or with respect to the Property by governmental and quasi-
     governmental authorities having jurisdiction; and (ii) all books and
     records (excluding appraisals, budgets, Seller's strategic plans for the
     Property, marketing information, submissions relating to Seller's obtaining
     of corporate authorization, or other information in the possession or
     control of Seller or PPS which is privileged, provided that inadvertent
     disclosure shall not constitute a waiver of any privilege) located at the
     Property or at the office of PPS relating to the Property and the ownership
     and operation thereof (the items described in clauses (i) and (ii) being
                                                   -----------     ---- 
     herein collectively called the "PROPERTY DOCUMENTS").

          6.3.9  Other Documents.  Such other documents as may be reasonably
                 ---------------                                            
     required by the Escrow Agent or as may be agreed upon by Seller and Buyer
     to consummate the transactions contemplated by this Agreement.

          6.3.10 Letters of Credit as Tenant Security Deposits.  With respect to
                 ---------------------------------------------                  
     any security deposits which are letters of credit, Seller shall, if the
     same are assignable, (i) deliver to Buyer on the date hereof such letters
     of credit, (ii) execute and deliver such other instruments as the issuers
     of such letters of credit shall reasonably require, and (iii) cooperate
     with Buyer to change the named beneficiary under such letters of credit to
     Buyer so long as Seller does not incur any additional liability or expense
     in connection therewith.

          6.3.11 Keys and Original Documents.  Keys to all locks on the Real
                 ---------------------------                                
     Property (in Seller's or PPS's possession) and originals or, if originals
     are not available, copies, of the Leases and Assigned Contracts (unless
     canceled as set forth herein) encumbering the Property on the date hereof.

          6.3.12 Transfer Taxes.  If applicable, duly completed and signed real
                 --------------                                                
     estate transfer tax forms (i.e., Preliminary Change of Ownership Reports).
                                ----                                           

     6.4  BUYER CLOSING DELIVERIES.  Concurrently herewith on the date hereof,
          ------------------------                                            
Buyer is delivering to Seller, or has caused to be delivered to the Escrow
Agent, the following:

          6.4.1  Purchase Price.  The Purchase Price, as adjusted for
                 --------------                                      
     apportionments and other adjustments required under this Agreement and
     Exhibit V of the Transaction Agreement, plus any other amounts required to
     be paid by Buyer at Closing (including Buyer's share of Closing costs).

          6.4.2  Assignment of Leases.  The Assignment of Leases executed by
                 --------------------                                       
     Buyer.

          6.4.3  Assignment of Equipment Leases and Service Contracts.  The
                 ----------------------------------------------------      
     Assignment of Contracts executed by Buyer.

                                       10

 
          6.4.4  Evidence of Authority.  Documentation to establish to Seller's
                 ---------------------                                         
     reasonable satisfaction the due authorization of Buyer's acquisition of the
     Property and its signatories and Buyer's delivery of the documents required
     to be delivered by Buyer pursuant to this Agreement.

          6.4.5  Other Documents.  Such other documents as may be reasonably
                 ---------------                                            
     required by the Escrow Agent or may be agreed upon by Seller and Buyer to
     consummate the transactions contemplated by this Agreement.

          6.4.6  Transfer Taxes.  If applicable, duly completed and signed real
                 --------------                                                
     estate transfer tax forms (i.e., Preliminary Change of Ownership Reports).
                                ----                                           

     6.5  DELIVERY OF DEED.  Effective upon delivery of the Deed, actual and
          ----------------                                                  
exclusive possession (subject only to the Permitted Exceptions) and risk of loss
to the Property shall pass from Seller to Buyer.

     6.6  WAIVER OF FAILURE OF CONDITIONS PRECEDENT.  By closing the
          -----------------------------------------                 
transactions contemplated by this Agreement, Seller and Buyer shall each be
conclusively deemed to have waived the benefit of any remaining unfulfilled
conditions precedent set forth in the Transaction Agreement.


             ARTICLE 7 - REPRESENTATIONS AND WARRANTIES OF SELLER

     7.1  GENERAL STATEMENT.  Seller makes the representations and warranties
          -----------------                                                  
with respect to Seller and the Real Property to Buyer which are set forth in
this Article 7.  All representations and warranties set forth in Section 7.3
     ---------                                                   -----------
shall, subject to the limitations of Section 10.1, survive the Closing (and none
                                     ------------                               
shall merge into any instrument of conveyance) for the period of time set forth
in Section 7.6 and all representations and warranties set forth in Section 7.5
   -----------                                                     -----------
hereof shall, subject to the limitations of Section 10.1, survive the Closing
                                            ------------                     
(and none shall merge into any instrument of conveyance) for the period of any
relevant statute of limitations therefor.  Representations and warranties of
Seller are made as of the date of this Agreement.

     7.2  ATTRIBUTION.  For purposes of this Agreement, the words "knowledge of
          -----------                                                          
Seller" or "Seller's knowledge" shall mean the actual and not constructive
knowledge of John Triece, Richard Salomon, Thomas Hendrian and John Syage
(collectively, the "SELLER KNOWLEDGE PARTIES").  Any fact, matter or other
statement shall not be deemed to be within the knowledge of Seller or Seller's
knowledge unless the Seller Knowledge Parties, or any of them, have actual
knowledge of such fact, matter or other statement.  The Seller Knowledge Parties
shall have no liability hereunder of any kind.  Notwithstanding the foregoing,
the representations and warranties made by Seller under Section 7.5 below are
                                                        -----------          
intended to be absolute in nature and are not limited by the knowledge or
attribution limitations of this Section 7.2.
                                ----------- 

                                       11

 
     7.3  SELLER'S REPRESENTATIONS AND WARRANTIES.  Seller represents and
          ---------------------------------------                        
warrants to Buyer that, except as set forth on Schedule A attached hereto and
                                               ----------                    
incorporated herein by this reference:

          7.3.1  The execution and delivery of this Agreement and the other
     documents to be executed by Seller in connection herewith, and the
     consummation of the transactions described herein or therein do not
     require, to the knowledge of Seller, the consent or approval of any
     governmental authority, nor, to Seller's knowledge, does the execution and
     delivery of this Agreement and the other documents to be executed by Seller
     in connection herewith violate, in any way material to the transactions
     described herein or therein, any contract or agreement to which Seller is a
     party (other than the Existing Mortgage Loan Documents, ECW Swap Notes and
     Three ECW I/P Loans) or any governmental or judicial order, judgment,
     decree, statute, law, rule or regulation applicable to Seller, and this
     Agreement and all documents to be executed by Seller in connection with the
     transactions described herein constitute the legal, valid and binding
     obligations of Seller.  To Seller's knowledge, other than the Existing
     Mortgage Loan Documents, the documents executed in connection with the ECW
     Swap Notes and the documents executed in connection with the Three ECW I/P
     Loans, Seller is not a party to, or bound by, any unexpired, undischarged
     or unsatisfied contract, agreement, indenture, mortgage, debenture, note or
     other instrument under the terms of which performance by Seller in
     accordance with the terms and provisions of this Agreement will be a
     default or an event of acceleration, or grounds for termination, and
     whereby such default, acceleration or termination will have a material
     adverse effect on the timely performance by Seller of its obligations under
     this Agreement and the other documents to be executed by Seller in
     connection herewith, nor does the execution of this Agreement or the other
     documents to be executed by Seller in connection herewith, or the
     consummation of the transactions contemplated hereby and thereby, violate
     the partnership agreement of Seller or constitute a breach thereunder.

          7.3.2  Seller has no employees.

          7.3.3  To Seller's knowledge, except as listed on Schedule A, Seller
                                                            ---------- 
     has not received any written notice of pending or threatened litigation,
     judgment, arbitration, investigation or proceeding against Seller or the
     Real Property that, if determined adversely, would have a material adverse
     effect on the operation, use or value of the Real Property or on the
     Buyer's ability to obtain any financing necessary to close the transactions
     contemplated by this Agreement, nor has Seller received any explicit oral
     notice of any such threatened litigation, judgment, arbitration,
     investigation or proceeding.

          7.3.4  To Seller's knowledge, except as listed on Schedule A, there
                                                            ---------- 
     are no Claims or liabilities affecting the Real Property that have not been
     previously disclosed to Buyer which would be binding upon Buyer after
     Closing and have a material adverse effect on the operation, use or value
     of the Real Property or on the Buyer's ability to obtain any financing
     necessary to close the transactions contemplated by this Agreement.

                                       12

 
          7.3.5  To Seller's knowledge, except as listed on Schedule A, Seller
                                                            ----------   
     has not received any written notice from any governmental authority of any
     special assessment, pending condemnation, or violation of any zoning,
     building, fire, or health code, statute, ordinance, rule or regulation
     applicable to the Real Property that would have a material adverse effect
     on the operation, use or value of the Real Property or on the Buyer's
     ability to obtain any financing necessary to close the transactions
     contemplated by this Agreement.

          7.3.6  To Seller's knowledge, Seller has not entered into any written
     equipment leases, service contracts or other such contracts or agreements
     affecting the Real Property which will remain in effect after the Closing
     Date and which will be binding upon Buyer after the Closing Date and which
     are not terminable or cancelable upon thirty (30) days notice
     (collectively, "CONTRACTS") other than those listed on Exhibit A and
                                                            ---------    
     Schedule A attached hereto.
     ----------                 

          7.3.7  To Seller's knowledge, the only Leases which will encumber the
     Real Property after the Closing are listed on Exhibit H attached hereto.
                                                   ---------                 

          7.3.8  To Seller's knowledge, there are no agreements affecting the
     Real Property with third parties for the provision of leasing brokerage
     services or under which leasing commissions would become due from and after
     the Closing, except as set forth on Schedule A.
                                         ----------  

          7.3.9  To Seller's knowledge, Seller has not received any written
     notice of any defaults under the terms of any of the Contracts, Leases or
     Encumbrance Documents that would have a material adverse effect on the use,
     operation or value of the Real Property after the Closing or on the Buyer's
     ability to obtain any financing necessary to close the transactions
     contemplated by this Agreement, except as set forth on Exhibit D and
                                                            ---------    
     Schedule A.  As used herein, the term "ENCUMBRANCE DOCUMENTS" shall mean,
     ----------                                                               
     collectively, all mortgages, deeds of trust, easements and other material
     agreements appurtenant to or burdening the Real Property.

          7.3.10 To Seller's knowledge, no rent or other amounts (other than
     security deposits) have been prepaid under any of the Leases, Contracts or
     Encumbrance Documents more than thirty (30) days in advance of the due
     dates thereof, except as set forth on Schedule A or, in the case of
                                           ----------                   
     Contracts, the proration schedule attached to Exhibit V of the Master
     Transaction Agreement (which will be provided on the date required
     therein).

     7.4  QUALIFICATIONS TO REPRESENTATIONS AND WARRANTIES.  To the extent that
          ------------------------------------------------                     
any of the representations or warranties of Seller under Section 7.3 are known
                                                         -----------          
to Buyer or any of its Affiliates to be inaccurate on the Closing Date and Buyer
nevertheless closes the transactions contemplated by this Agreement, such
representation(s) or warranty(ies) shall be deemed modified to the extent of
such known inaccuracy and Seller shall not be deemed in breach of the

                                       13

 
representation or warranty.  Notwithstanding anything to the contrary stated or
implied herein and in furtherance of the foregoing provisions of this Section
                                                                      -------
7.4, Seller shall have no liability for or with respect to any representation or
- ---                                                                             
warranty (or breach thereof) from and after the Closing if, prior to the
Closing, Buyer or any of its Affiliates discovers or learns of information (from
whatever source, including, without limitation, Seller, its constituent partners
or any of their employees), or any reports, instruments or other documentation
which were reviewed by or made available for review by Buyer or any of its
Affiliates in connection with the transactions contemplated hereby (including,
without limitation, any reports, surveys, and other due diligence documentation
procured independently by Buyer or any of its Affiliates in connection with the
transactions contemplated hereby) contain information that contradicts such
representation and warranty, or renders such representation and warranty untrue
or incorrect.

     7.5  DUE FORMATION, ETC.  Seller is a limited partnership duly formed and
          ------------------                                                  
existing under the laws of the State of California and is not insolvent, and has
all necessary power and authority to execute and deliver this Agreement and all
documents executed by Seller in connection herewith and to perform all its
obligations hereunder and thereunder.  This Agreement has been duly authorized
by all requisite partnership action on the part of Seller's partners.  Seller is
not a Person other than a United States Person within the meaning of the Code
and the transactions contemplated herein are not subject to the withholding
provisions of section 3406 or subchapter A of Chapter 3 of the Code.

     7.6  LIMITATIONS.  Except for the representations and warranties of Seller
          -----------                                                          
set forth in Section 7.5 above (which shall survive the Closing without any
             -----------                                                   
limit other than those limits imposed by the applicable statute of limitations
or other similar laws), the representations and warranties of the parties in
this Agreement shall survive until a date (the "LIMITATION DATE") which is
twelve (12) months after the Closing Date, subject to Buyer's right to commence
or prosecute against Seller any claim for the breach of a representation or
warranty relating to events or occurrences which occurred prior to the
Limitation Date, provided such claim is actually filed no later than forty-five
(45) days after the Limitation Date, and otherwise no action based thereon shall
be commenced after the Closing Date.  The representations and warranties of
Seller made in this Agreement are personal to Buyer and no Person other than
Buyer shall be entitled to bring any action based thereon.  The representations
and warranties set forth above are further subject to the limitations of
liability set forth in Section 12.1.2 of the Transaction Agreement, which
limitations are in addition to (and not in lieu of) the limitations set forth in
this Agreement.


              ARTICLE 8 - REPRESENTATIONS AND WARRANTIES OF BUYER

     8.1  GENERAL STATEMENT.  Buyer makes the representations and warranties to
          -----------------                                                    
Seller which are set forth in this Article 8.  All such representations and
                                   ---------                               
warranties and all representations and warranties which are set forth elsewhere
in this Agreement or in any document delivered by Buyer pursuant to or in
connection with this Agreement shall survive the Closing (and none shall merge
into any instrument of conveyance), regardless of any investigation or lack of

                                       14

 
investigation by Seller.  No specific representation or warranty shall limit the
generality or applicability of a more general representation or warranty.
Representations and warranties of Buyer are made as of the date of this
Agreement.

     8.2  ATTRIBUTION.  For purposes of the representations and warranties of
          -----------                                                        
Buyer set forth in this Article 8 only, the words "knowledge of Buyer" or
                        ---------                                        
"Buyer's knowledge" shall mean the actual and not constructive knowledge of
Mortimer Zuckerman, Edward Linde and Thomas O'Connor (collectively, the "BUYER
KNOWLEDGE PARTIES").  Any fact, matter or other statement shall not be deemed to
be within the knowledge of Buyer or Buyer's knowledge unless the Buyer Knowledge
Parties, or any of them, have actual knowledge of such fact, matter or other
statement.

     8.3  DUE FORMATION, AUTHORIZATION, ETC. OF BUYER.  Buyer is a limited
          -------------------------------------------                     
liability company, duly formed and validly existing under the laws of the State
of Delaware, is duly qualified and in good standing as a foreign limited
liability company under the laws of the State of California, and has all
necessary power, partnership and otherwise, to execute and deliver this
Agreement and all documents executed by it in connection herewith and to perform
all its obligations hereunder and thereunder.  This Agreement (and each other
document to be executed by Buyer in connection herewith) has been duly
authorized by all requisite company action on the part of Buyer.  The execution
and delivery of this Agreement and all documents to be executed by Buyer in
connection herewith, and the consummation of the transactions contemplated
hereby and thereby, do not require the consent or approval of the members of
Buyer or, to the knowledge of Buyer, the consent or approval of any governmental
authority, nor, to the knowledge of Buyer, does the execution and delivery of
this Agreement or any of the documents to be executed in connection herewith
violate, in any way material to the transactions contemplated hereby or thereby,
any contract or agreement to which Buyer is a party or any governmental or
judicial order, judgment, decree, statute, law, rule or regulation applicable to
Buyer, and this Agreement and all documents executed by Buyer in connection
herewith constitute the legal, valid and binding obligations of Buyer.  Neither
Buyer nor Public Company are a party to, or bound by, any unexpired,
undischarged or unsatisfied contract, agreement, indenture, mortgage, debenture,
note or other instrument under the terms of which performance by Buyer according
to the terms of this Agreement will be a default or an event of acceleration, or
grounds for termination, or whereby timely performance by Buyer according to the
terms of this Agreement, may be prohibited, prevented or delayed.

     8.4  LIMITATIONS.  The representations and warranties of Buyer set forth
          -----------                                                        
hereinabove shall survive the Closing without any limit other than those limits
imposed by the applicable statute of limitations or other similar laws.  The
representations and warranties of Buyer made in this Agreement are personal to
Seller (and Seller's partners) and no Person other than Seller (or its partners)
shall be entitled to bring any action based thereon.

                                       15

 
                             ARTICLE 9 - COVENANTS

     9.1  PUBLICITY.  Seller and Buyer each hereby covenants and agrees that
          ---------                                                         
neither Seller nor Buyer shall issue any press release or public statement (a
"RELEASE") with respect to the transactions contemplated hereby without the
prior consent of the other, except to the extent required by law or by the rules
or regulations of any securities exchange.  If either Seller or Buyer is
required by law to issue a Release, such party shall, at least two (2) business
days prior to the issuance of the Release, deliver a copy of the proposed
Release to the other party for its review and comment.

     9.2  SURVIVAL.  The provisions of this Article 9 shall survive the Closing
          --------                          ---------                          
(and not be merged therein).


                ARTICLE 10 - BREACH; DEFAULT; LIABILITY LIMITS

     10.1 BUYER'S RIGHTS.  In the event of any claim, suit or other action
          --------------                                                  
against Seller pertaining to (a) this Agreement, any of the documents executed
in connection herewith or any of the transactions contemplated hereby or thereby
(including, without limitation, any and all indemnification obligations of
Seller hereunder or thereunder) or (b) a breach by Seller of any of the terms or
provisions of this Agreement or of any of the documents executed by Seller in
connection herewith (including, without limitation, the breach of any
representation or warranty of Seller set forth herein or therein), Buyer's sole
remedy shall be an action for monetary damages; provided that, except for the
                                                -------- ----                
breach of the representations and warranties set forth in Sections 7.3.1, 7.3.2
                                                          --------------  -----
and 7.5 above (which will not be subject to any liability cap), and
    ---                                                            
notwithstanding any provision to the contrary contained in this Agreement, the
Transaction Agreement or in any other documents executed in connection herewith
or therewith, the maximum aggregate liability of Seller, and the maximum
aggregate amount which may be awarded to and collected by Buyer or any other
Person, with respect to any claim, suit or other action relating in any way to
this Agreement, any of the documents executed in connection herewith or any of
the transactions contemplated hereby or thereby, shall not exceed the Building
Maximum Liability Amount for the Old Federal Reserve Building.  The terms and
provisions of this Section 10.1 are further subject to the overall $43,000,000
                   ------------                                               
limitation of liability set forth in Section 12.1.2 of the Transaction
Agreement, it being acknowledged and agreed that the liability cap set forth
hereinabove may be further reduced as a result of recoveries made by Buyer or
its Affiliates in connection with the other transactions described in the
Transaction Agreement in accordance with said Section 12.1.2 of the Transaction
Agreement.  Notwithstanding the foregoing, the parties hereto hereby acknowledge
and agree that the foregoing caps on liability (and any other cap on the
liability of the Ventures or the Transferor Parties set forth in any other
Transaction Document) does not apply to the breach of any of the representations
and warranties set forth in Sections 7.3.1, 7.3.2 or 7.5 hereof.  In any event,
                            --------------  -----    ---                       
any monetary damages recoverable from Seller shall be recovered only from the
individual partners of Seller severally in the ratio of each such partner's

                                       16

 
percentage interest in and to Seller immediately prior to the Closing.  The
terms and provisions of this Section 10.1 shall survive the Closing and shall
                             ------------                                    
not be merged therein.

     10.2 Seller's Rights.  In the event of a breach by Buyer of any of the
          ---------------                                                  
terms or provisions of this Agreement or any of the documents executed in
connection herewith, Seller shall be entitled to pursue any and all rights and
remedies at law or in equity available to Seller with respect to such breach;
provided that, except for breaches of the representations and warranties set
- -------- ----                                                               
forth in Article 8 hereof (which will not be subject to any liability cap), and
         ---------                                                             
except as otherwise expressly provided in any other Transaction Document, the
maximum aggregate liability of Buyer and Public Company for any and all breaches
of the representations and warranties of Buyer and/or Public Company contained
in any Transaction Document shall not exceed an amount equal to Forty-Three
Million Dollars ($43,000,000) in the aggregate.  The terms and provisions of
this Section 10.2 shall survive the Closing and shall not be merged therein.
     ------------                                                           


                      ARTICLE 11 - INTENTIONALLY OMITTED


                          ARTICLE 12 - MISCELLANEOUS

     12.1 BUYER'S ASSIGNMENT.  Buyer may assign this Agreement to an Affiliate
          ------------------                                                  
of Buyer without Seller's consent; provided that, Buyer shall not be released
                                   -------- ----                             
from any obligations or liabilities of the "Buyer" hereunder as a result of such
assignment, whether such obligations or liabilities accrued or occurred prior
to, on or after the date of such assignment.  Except as expressly permitted by
the preceding sentence, Buyer shall not assign this Agreement or its rights
hereunder to any Person without the prior written consent of Seller, which
consent Seller may grant or withhold in its sole discretion, and any such
assignment without Seller's consent shall be null and void.

     12.2 DESIGNATION AGREEMENT.  Section 6045(e) of the Code and the
          ---------------------                                      
regulations promulgated thereunder (herein collectively called the "REPORTING
REQUIREMENTS") require an information return to be made to the United States
Internal Revenue Service, and a statement to be furnished to Seller, in
connection with the transactions contemplated by this Agreement. Escrow Agent
("AGENT") is either (i) the Person responsible for closing the transactions (as
described in the Reporting Requirements) or (ii) the disbursing title or escrow
company that is most significant in terms of gross proceeds disbursed in
connection with the transactions (as described in the Reporting Requirements).
Accordingly:

          (i)  Agent is hereby designated as the "Reporting Person" (as defined
     in the Reporting Requirements) for the transactions.  Escrow Agent shall
     perform all duties that are required by the Reporting Requirements to be
     performed by the Reporting Person for the transactions.

                                       17

 
          (ii)  Seller and Buyer shall furnish to Agent, in a timely manner, any
     information requested by Escrow Agent and necessary for Agent to perform
     its duties as Reporting Person for the transactions.

          (ii)  Agent hereby requests Seller to furnish to Agent Seller's
     correct taxpayer identification number. Seller acknowledges that any
     failure by Seller to provide Agent with Seller's correct taxpayer
     identification number may subject Seller to civil or criminal penalties
     imposed by law. Accordingly, Seller hereby certifies to Agent, under
     penalties of perjury, that Seller's correct taxpayer identification number
     is 94-2919280.

          (iv)  Each of the parties hereto shall retain this Agreement for a
     period of four (4) years following the calendar year during which Closing
     occurs.

     12.3 INTEGRATION; WAIVER.  This Agreement, together with the Schedules and
          -------------------                                                  
Exhibits hereto, embodies and constitutes the entire understanding between the
parties with respect to the transactions contemplated herein and all prior
agreements, understandings, representations and statements, oral or written, are
merged into this Agreement.  Neither this Agreement nor any provision hereof may
be waived, modified, amended, discharged or terminated except by an instrument
signed by the party against whom the enforcement of such waiver, modification,
amendment, discharge or termination is sought, and then only to the extent set
forth in such instrument.  No waiver by either party hereto of any failure or
refusal by the other party to comply with its obligations hereunder shall be
deemed a waiver of any other or subsequent failure or refusal to so comply.

     12.4 GOVERNING LAW.  This Agreement shall be governed by, and construed in
          -------------                                                        
accordance with, the law of the State of California.

     12.5 CAPTIONS NOT BINDING; SCHEDULES AND EXHIBITS.  The captions in this
          --------------------------------------------                       
Agreement are inserted for reference only and in no way define, describe or
limit the scope or intent of this Agreement or of any of the provisions hereof.
All Schedules and Exhibits attached hereto shall be incorporated by reference as
if set out herein in full.

     12.6 BINDING EFFECT.  This Agreement shall be binding upon and shall inure
          --------------                                                       
to the benefit of the parties hereto and their respective successors and
permitted assigns.

     12.7 SEVERABILITY.  If any term or provision of this Agreement or the
          ------------                                                    
application thereof to any Persons or circumstances shall, to any extent, be
invalid or unenforceable, the remainder of this Agreement or the application of
such term or provision to Persons or circumstances other than those as to which
it is held invalid or unenforceable shall not be affected thereby, and each term
and provision of this Agreement shall be valid and enforced to the fullest
extent permitted by law.

                                       18

 
     12.8 NOTICES.  Any notice, request, demand, consent, approval and other
          -------                                                           
communications under this Agreement shall be in writing, and shall be deemed
duly given or made at the time and on the date when personally delivered as
shown on a receipt therefor (which shall include delivery by a nationally
recognized overnight delivery service) or three (3) business days after being
mailed by prepaid registered or certified mail, return receipt requested, to the
address for each party set forth below.  Any party, by written notice to the
other in the manner herein provided, may designate an address different from
that set forth below.

          IF TO BUYER:
          ----------- 

                         BP OFR LLC
                         c/o Boston Properties, Inc.
                         8 Arlington Street
                         Boston, Massachusetts 02116-3495
                         Attention:  General Counsel
                         Facsimile:  (617) 421-1555

          COPY TO:
          --------

                         Goulston & Storrs, P.C.
                         400 Atlantic Avenue
                         Boston, Massachusetts 02110-3333
                         Attention:  Eli Rubenstein, Esq.
                         Facsimile:  (617) 574-4112

          IF TO SELLER:
          -------------

                         Prudential Realty Group
                         8 Campus Drive
                         4th Floor - Arbor Circle South
                         Parsippany, New Jersey 07054
                         Attention:  John R. Triece
                         Facsimile:  (201) 683-1797

          AND:
          ----

                         Fedmark Corporation
                         30 Rockefeller Plaza, Room 5600
                         New York, New York 10112
                         Attention:  Richard E. Salomon
                         Facsimile:  (212) 424-1806

                                       19

 
          COPY TO:
          --------

                         The Prudential Insurance Company
                         of America
                         c/o Prudential Capital Group
                         4 Embarcadero Center
                         Suite 2700
                         San Francisco, California 94111
                         Attention:  Harry Mixon, Esq.
                         Facsimile:  (415) 956-2197

          COPY TO:
          --------

                         Pacific Property Service, L.P.
                         Suite 2600
                         Four Embarcadero Center
                         San Francisco, California 94111
                         Attention:  Chief Financial Officer
                         Facsimile:  (415) 956-7134

          COPY TO:
          --------

                         O'Melveny & Myers LLP
                         Embarcadero Center West
                         275 Battery Street
                         San Francisco, California 94111
                         Attention:  Stephen A. Cowan, Esq.
                         Facsimile:  (415) 984-8701

          COPY TO:
          --------

                         Willkie Farr & Gallagher
                         787 Seventh Avenue
                         New York, New York 10019-6099
                         Attention:  Bruce M. Montgomerie, Esq.
                         Facsimile:  (212) 728-8111


     12.9  COUNTERPARTS. This Agreement may be executed in counterparts, each of
           ------------     
which shall be an original and all of which counterparts taken together shall
constitute one and the same agreement.

                                       20

 
     12.10 NO RECORDATION.  Seller and Buyer each agrees that neither this
           --------------                                                 
Agreement nor any memorandum or notice hereof shall be recorded.

     12.11 ADDITIONAL AGREEMENTS; FURTHER ASSURANCES.  Subject to the terms and
           -----------------------------------------                           
conditions herein provided, each of the parties hereto shall execute and deliver
such documents as the other party shall reasonably request in order to
consummate and make effective the transactions contemplated by this Agreement;
provided, however, that the execution and delivery of such documents by such
- --------- -------                                                           
party shall not result in any additional liability or cost to such party.

     12.12 CONSTRUCTION. The parties acknowledge that each party and its counsel
           ------------    
have reviewed and revised this Agreement and that the normal rule of
construction to the effect that any ambiguities are to be resolved against the
drafting party shall not be employed in the interpretation of this Agreement or
any amendment, Schedule or Exhibit hereto.

     12.13 BUSINESS DAY.  As used herein, the term "business day" shall mean any
           ------------                                                         
day other than a Saturday, Sunday, or any Federal or State of California
holiday.

     12.14 CONSENT TO JURISDICTION AND SERVICE OF PROCESS.  ALL JUDICIAL
           ----------------------------------------------               
PROCEEDINGS BROUGHT AGAINST ANY PERSON ARISING OUT OF OR RELATING TO THIS
AGREEMENT MAY BE BROUGHT IN ANY STATE OR FEDERAL COURT OF COMPETENT JURISDICTION
IN THE STATE OF CALIFORNIA, AND BY EXECUTION AND DELIVERY OF THIS AGREEMENT EACH
PARTY HERETO ACCEPTS FOR ITSELF, GENERALLY AND UNCONDITIONALLY, THE NONEXCLUSIVE
JURISDICTION OF THE AFORESAID COURTS AND WAIVES ANY DEFENSE OF FORUM NON
CONVENIENS AND IRREVOCABLY AGREES TO BE BOUND BY ANY JUDGMENT RENDERED THEREBY
IN CONNECTION WITH THIS AGREEMENT.  Each party hereby agrees that service of all
process in any such proceeding in any such court may be made by registered or
certified mail, return receipt requested, to any other party hereto, at its
address provided in this Agreement, such service being hereby acknowledged by
each party to be sufficient for personal jurisdiction in any action against such
party in any such court and to be otherwise effective and binding service in
every respect.  Nothing herein shall affect the right to serve process in any
other manner permitted by law.

     12.15 WAIVER OF JURY TRIAL.  EACH OF THE PARTIES TO THIS AGREEMENT HEREBY
           --------------------                                               
AGREES TO WAIVE ITS RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF
ACTION BASED UPON OR ARISING OUT OF THIS AGREEMENT OR ANY DEALINGS BETWEEN THEM
RELATING TO THE SUBJECT MATTER OF THIS AGREEMENT.  The scope of this waiver is
intended to be all-encompassing of any and all disputes that may be filed in any
court and that relate to the subject matter of this transaction, including,
without limitation, contract claims, tort claims, breach of duty claims and all
other common law and statutory claims.  Each party hereto acknowledges that this
waiver is a material inducement to enter into a business relationship, that each
has already relied on this waiver in entering into this Agreement, and that each
shall continue to rely on this waiver in their related 

                                       21

 
future dealings. Each party hereto further warrants and represents that it has
reviewed this waiver with its legal counsel and that it knowingly and
voluntarily waives its jury trial rights following consultation with such legal
counsel. THIS WAIVER IS IRREVOCABLE, MEANING THAT IT MAY NOT BE MODIFIED EITHER
ORALLY OR IN WRITING, AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS,
RENEWALS, SUPPLEMENTS OR MODIFICATIONS TO THIS AGREEMENT. In the event of
litigation, this Agreement may be filed as a written consent to a trial by the
court.


                 [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

                                       22

 
          IN WITNESS WHEREOF, each party hereto has caused this Agreement to be
duly executed on its behalf on the day and year first above written.

                         "SELLER"

                         TWO EMBARCADERO CENTER WEST,
                         a California limited partnership

                         By:  FEDMARK CORPORATION,
                              a Delaware corporation,
                              General Partner


                              By: /s/ [Signature Illegible]
                                 ------------------------------
                              Name: ___________________________
                              Title: __________________________

                         By:  THE PRUDENTIAL INSURANCE COMPANY             
                              OF AMERICA, a New Jersey corporation,
                              General Partner



                              By: /s/ Gary L. Frazier
                                 ------------------------------
                              Name: ___________________________
                              Title: __________________________


                     [SIGNATURES CONTINUED ON NEXT PAGE] 

                                      S-1

 
                         "BUYER"



                         BP OFR LLC,
                         a Delaware limited liability company

                         By:  BOSTON PROPERTIES LIMITED
                              PARTNERSHIP, a Delaware limited
                              partnership, its sole member

                              By:   BOSTON PROPERTIES, INC.,
                                    a Delaware corporation,
                                    its general partner



                                    By: /s/ Thomas J. O'Connor
                                       ------------------------------
                                    Name: Thomas J. O'Connor
                                    Title: Vice President
 


The undersigned, as escrow agent, has executed this Agreement solely to confirm
its agreement to comply with the provisions of Article 6.
                                               --------- 

FIRST AMERICAN TITLE
INSURANCE COMPANY



By: /s/ J. C. Calder
   -----------------------------------------
        Name: J.C. Calder
        Its: Vice President


Date: November 12, 1998



 
                                                                    Exhibit 99.2

                                                                  Execution Copy


                                                                               
                                        

                             CONTRIBUTION AGREEMENT

                                  BY AND AMONG

                            BOSTON PROPERTIES, INC;

                     BOSTON PROPERTIES LIMITED PARTNERSHIP;

                 EMBARCADERO CENTER INVESTORS PARTNERSHIP; AND

               THOSE PERSONS LISTED ON EXHIBIT A ATTACHED HERETO

 
                               TABLE OF CONTENTS

                                   ARTICLE I

 Section 1.1  Definitions ..................................................2

                                   ARTICLE II

 Section 2.1  Contribution .................................................4

                                  ARTICLE III
DUE DILIGENCE/CONDITION OF EC/ECA BUILDINGS ................................5

 Section 3.1  Transferee Parties' Inspections and Due Diligence ............5
 Section 3.2  Property Sold "As Is .........................................6

                                   ARTICLE IV
REPRESENTATIONS AND WARRANTIES AS TO THE PROPERTY, THE EC/ECA 
VENTURES AND THE EC/ECA BUILDINGS .........................................10

 Section 4.1  General Statement............................................10
 Section 4.2  Attribution .................................................10
 Section 4.3  Representations and Warranties Re: ECIP Business 
               and EC/ECA Buildings .......................................11
 Section 4.4  Qualifications to Representations and Warranties ............13
 Section 4.5  Due Formation, Etc

                                   ARTICLE V
REPRESENTATIONS AND WARRANTIES AS TO ECIP PARTNERS ........................14

 Section 5.1  General Statement ...........................................14
 Section 5.2  Attribution .................................................14
 Section 5.3  Due Organization; Authorization; Other Matters ..............14
 Section 5.4  Securities Laws .............................................16

                                   ARTICLE VI
REPRESENTATIONS AND WARRANTIES OF PUBLIC COMPANY ..........................16

 Section 6.1  General Statement ...........................................16
 Section 6.2  Attribution .................................................16
 Section 6.3  Representations and Warranties Re: Public Company 
               Business and Operations ....................................17
 Section 6.4  Due Organization, Etc. of Public Company.....................19

                                  ARTICLE VII
REPRESENTATIONS AND WARRANTIES OF INVESTOR ................................20

 Section 7.1  General Statement ...........................................20

                                       i

 
 Section 7.2  Attribution .................................................20
 Section 7.3  Representations and Warranties Re: Investor 
               Business and Operations ....................................20
 Section 7.4  Due Formation, Etc. of Investor .............................21

                                  ARTICLE VIII
LIMITATIONS ...............................................................22

 Section 8.1  Limitations .................................................22

                                   ARTICLE IX
COVENANTS .................................................................23

 Section 9.1  Confidentiality .............................................23
 Section 9.2  Public Statements ...........................................24
 Section 9.3  Survival ....................................................24

                                   ARTICLE X
CLOSING ...................................................................25

 Section 10.1  Closing Deliveries .........................................25
 Section 10.2  ECIP Contribution Value; Allocations .......................26
 Section 10.3  Apportionment Credit .......................................27
 Section 10.4  Delayed Adjustment .........................................27
 Section 10.5  Survivability ..............................................28
 Section 10.6  Closing Costs ..............................................28

                                   ARTICLE XI
BREACH, DEFAULT, LIABILITY LIMITS .........................................28

 11.1  Rights of Investor and Public Company ..............................28
 11.2  Rights of ECIP and ECIP Partners ...................................30

                                  ARTICLE XII
MISCELLANEOUS

 Section 12.1  Expenses ...................................................30
 Section 12.2  Amendment ..................................................30
 Section 12.3  Notices ....................................................31
 Section 12.4  Waivers ....................................................32
 Section 12.5  Counterparts ...............................................32
 Section 12.6  Interpretation .............................................32
 Section 12.7  Governing Law ..............................................32
 Section 12.8  Assignment .................................................32
 Section 12.9  No Third Party Beneficiaries ...............................32
 Section 12.10 Further Assurances .........................................32

                                       ii

 
 Section 12.11 Severability ...............................................32
 Section 12.12 Remedies Cumulative ........................................33
 Section 12.13 Entire Understanding .......................................33
 Section 12.14 Consent to Jurisdiction and Service of Process .............33
 Section 12.15 Waiver of Jury Trial .......................................33
 
Exhibit A      -      List of ECIP Partners (See Exhibit A to Exhibit F hereto)
Exhibit B      -      Investor Agreement (Certificate of Designation for 
                       Preferred Units)
Exhibit C      -      Registration Rights Agreement
Exhibit D      -      Title Commitment
Exhibit E      -      Tax Reporting Agreement
Exhibit F      -      Assignment of Partnership Interest
Exhibit G      -      Existing Mortgages
Exhibit H      -      ECIP Lease
                  
Schedule 4.3(e)       -
                  
Schedule 4.3(f)       -
                  
Schedule 4.3(g)       -
                  
Schedule 4.3(h)   
                  
Schedule 4.3 (i)  
                  
Schedule 4.3(j)       -
                  
Schedule 4.3(k)       -
                  
Schedule 4.3(l)       -
                  
Schedule 4.4          -
                  
Schedule 6.3(e)       -
                  
Schedule 6.3(g)       -

Schedule 10.1(b)(ix)  -  Representation Letter

                                      iii

 
Exhibit I                Ownership Limit Certificate

                                       iv

 
                             CONTRIBUTION AGREEMENT

     This CONTRIBUTION AGREEMENT (this "AGREEMENT"), is made and entered into as
of November 12, 1998, by and among BOSTON PROPERTIES, INC., a Delaware
corporation ("PUBLIC COMPANY"), BOSTON PROPERTIES LIMITED PARTNERSHIP, a
Delaware limited partnership ("INVESTOR"), EMBARCADERO CENTER INVESTORS
PARTNERSHIP, a California limited partnership ("ECIP"), and the Partners in ECIP
on the date of the Transaction Agreement and listed on Exhibit A attached
                                                        ---------         
hereto (the "ECIP PARTNERS").

                              W I T N E S S E T H
                              - - - - - - - - - -

     WHEREAS, this Agreement is hereby executed, and the transactions described
herein are being consummated concurrently with certain other transactions,
pursuant to (and in accordance with) that certain Master Transaction Agreement
dated as of September 28, 1998, by and among The Prudential Insurance Company of
America, PIC Realty Corporation, certain persons listed on Exhibit A attached
thereto, ECIP, Fedmark Corporation, Pacific Property Services, L.P., Investor
and Public Company (the "TRANSACTION AGREEMENT") (all initially capitalized
terms used herein without definition shall have the meanings given such terms in
the Transaction Agreement);

     WHEREAS, the ECIP Partners own, collectively, all of the interests in ECIP,
ECIP is a partner in each of the Existing EC/ECA Ventures, and the ECIP
Partners desire to contribute to Investor their respective partnership interests
in ECIP and thereby  their indirect  interests in and to each such Existing
EC/ECA Venture solely in exchange for Investor Preferred Units (as defined
below), all on the terms and conditions described herein;

     WHEREAS, concurrently with the Closing of the transactions described in
this Agreement, Investor is amending and restating its partnership agreement by
executing a Certificate of Designation to such Partnership Agreement which
creates a class of Series Two Preferred Units, substantially in the form
attached hereto as Exhibit B (the "INVESTOR AGREEMENT") and admitting the ECIP
                   ---------                                                  
Partners as additional Limited Partners of Investor with the number of Series
Two  Preferred Units determined herein ; and

     WHEREAS, concurrently with the consummation of the transactions
contemplated by this Agreement, Public Company and ECIP are executing a
Registration Rights Agreement substantially in the form attached hereto as
                                                                          
Exhibit C (the "REGISTRATION RIGHTS AGREEMENT").
- ---------                                       

     NOW, THEREFORE, in consideration of the foregoing and of the mutual
covenants and agreements contained in this Agreement, and for other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto agree as follows:

 
                                   ARTICLE I

                                  DEFINITIONS
                                  -----------

     SECTION 1.1.  DEFINITIONS.  In addition to the terms defined in the
                   -----------                                          
Transaction Agreement and elsewhere in this Agreement, the following terms shall
have the meanings set forth herein for the purposes of the transactions
described in this Agreement:

     "BUILDING MAXIMUM LIABILITY AMOUNT" has the meaning set forth in 
Section 11.1(a).
- --------------- 

     "BUSINESS DAY" means any day of the year other than Saturday, Sunday or any
other day on which banks located in Boston, Massachusetts are authorized to
close for business.

     "CLOSING" has the meaning set forth in Section 10.1(a).
                                            --------------- 

     "CLOSING DATE" has the meaning set forth in Section 10.1(a).
                                                 --------------- 

     "CONFIDENTIAL MATERIAL" has the meaning set forth in Section 9.1(a).
                                                          -------------- 

     "CONTRACTS" has the meaning set forth in Section 4.3(f).
                                              -------------- 

     "DOCUMENTS" has the meaning set forth in Section 3.1(a).
                                              -------------- 

     "ECIP" has the meaning given such term in the Introductory Paragraph.

     "ECIP CONTRIBUTION VALUE" has the meaning set forth in Section 10.2.
                                                            ------------ 

     "ECIP KNOWLEDGE PARTY" has the meaning set forth in Section 4.2.
                                                         ----------- 

     "ECIP LEASE" means that certain lease between Four Embarcadero Center
Venture, as landlord, and ECIP, as tenant, attached as Exhibit H and subject to
the sublease and subsubleases attached to Exhibit H.

     "ECIP PARTIES" has the meaning set forth in Section 3.2(a).
                                                 -------------- 

     "ECIP PARTNER KNOWLEDGE PARTIES" has the meaning set forth in Section 5.2.
                                                                   ----------- 

     "ECIP PARTNERS" has the meaning given such term in the Introductory
Paragraph.

     "ECIP WARRANTIES" has the meaning set forth in Section 3.2(a).
                                                    -------------- 

     "EC/ECA VENTURE PARTNERSHIP AGREEMENTS" means the partnership agreements of
the respective EC/ECA Ventures, as amended, modified or supplemented.

     "ENCUMBRANCE DOCUMENTS" has the meaning set forth in Section 4.3(i).
                                                          -------------- 

     "EXISTING MORTGAGES" means those certain mortgages described on  Exhibit G
annexed hereto.

                                      -2-

 
     "FOUR EC EXISTING DEBT BALANCE" shall mean the total unpaid balance
(including all principal and accrued and unpaid interest) of all Existing
Mortgages secured by Four EC on the Closing Date.

     "FOUR EC VALUE" has the meaning set forth in Section 10.2.
                                                  ------------ 

     "HAZARDOUS MATERIALS" means any substance, chemical, waste or material that
is or becomes regulated by any federal, state or local governmental authority
because of its toxicity, infectiousness, radioactivity, explosiveness,
ignitability, corrosiveness or reactivity, including, without limitation,
asbestos or any substance containing more than O.1 percent asbestos, the group
of compounds known as polychlorinated byphenyls, flammable explosives, oil,
petroleum or other refined petroleum product.

     "INVESTOR" has the meaning given such term in the Introductory Paragraph.

     "INVESTOR AGREEMENT" has the meaning given such term in the preamble.

     "INVESTOR KNOWLEDGE PARTIES" has the meaning set forth in Section 7.2.
                                                               ----------- 

     "INVESTOR PREFERRED UNITS" means the Series Two Preferred Units as set
forth in the Investor Agreement.

     "LIMITATION DATE" has the meaning set forth in Article VIII.
                                                    ------------ 

     "ONE EC EXISTING DEBT BALANCE" shall mean the total unpaid balance
(including all principal and accrued and unpaid interest) of all Existing
Mortgages secured by One EC on the Closing Date.

     "ONE EC VALUE" has the meaning set forth in Section 10.2.
                                                 ------------ 

     "PERMITTED EXCEPTIONS" means the Permitted Exceptions as defined in the
Transaction Agreement pertain to the Buildings in which ECIP has an indirect
interest.

     "PROPERTY" means the ECIP Partners' partnership interests in ECIP as
reflected in the ECIP Partnership Agreement as of  the date of the Transaction
Agreement, which Property constitutes all outstanding partnership interests in
ECIP.

     "PROVIDING PARTY" has the meaning set forth in Section 9.1(a).
                                                    -------------- 

     "PUBLIC COMPANY" has the meaning given such term in the Introductory
Paragraph.

     "PUBLIC COMPANY KNOWLEDGE PARTIES" has the meaning set forth in 
Section 6.2.
- -----------

     "RECEIVING PARTY" has the meaning set forth in Section 9.1(a).
                                                    -------------- 

     "REGISTRATION RIGHTS AGREEMENT" has the meaning given such term in the
preamble.

                                      -3-

 
     "REPRESENTATIVES" has the meaning set forth in Section 9.1(a).
                                                    -------------- 

     "SECURITIES" means, as applicable, the Shares, and the Investor Preferred
Units that may be issued pursuant to the Investor Agreement.

     "SECURITIES ACT" means the Securities Act of 1933, as amended.

     "SHARES" means the shares of the Public Company's common stock, $0.01 par
value per share.

     "TAX RETURN" means any return, report or other document or information
required to be supplied to a taxing authority in connection with Taxes.

     "TAXES" means all taxes, charges, fees, levies or other assessments,
including, without limitation, income, gross receipts, excise, property, sales,
withholding, social security, occupation, use, service, license, payroll,
franchise, transfer and recording taxes, fees and charges, imposed by the United
States, or any state, local or foreign government or subdivision or agency
thereof, whether computed on a separate, consolidated, unitary, combined or any
other basis; and such terms shall include any interest, fines, penalties or
additional amounts attributable to or imposed on or with respect to any such
taxes, charges, fees, levies or other assessments.

     "THREE EC EXISTING DEBT BALANCE" shall mean the total unpaid balance
(including all principal and accrued and unpaid interest) of all Existing
Mortgages secured by Three EC on the Closing Date.

     "THREE EC VALUE" has the meaning set forth in Section 10.2.
                                                   ------------ 

     "TRANSACTION AGREEMENT" has the meaning given such term in the preamble.

     "TRANSFEREE PARTIES" has the meaning set forth in Section 3.2(b)(i).
                                                       ----------------- 

     "TRANSFEREE PARTY-COVERED CLAIMS" has the meaning set forth in 
Section 3.2(b)(i).
- ----------------- 

     "TWO EC EXISTING DEBT BALANCE" shall mean the total unpaid balance
(including all principal and accrued and unpaid interest) of all Existing
Mortgages secured by Two EC on the Closing Date.

     "TWO EC VALUE" has the meaning set forth in Section 10.2.
                                                 ------------ 

                                   ARTICLE II

                                  CONTRIBUTION
                                  ------------

          SECTION 2.1  CONTRIBUTION.  Subject to the terms and conditions set
                       ------------                                          
     forth in this Agreement, the ECIP Partners are concurrently herewith
     contributing to Investor (and Investor is accepting) the Property in
     exchange for an aggregate number of Investor Preferred Units equal to the
     sum of (i) (A)100% of the ECIP Contribution Value plus (B) 

                                      -4-

 
     ECIP's indirect interest in the NMV (as indicated in the Transaction
     Agreement and after applying any adjustments thereto in accordance with
     such Agreement) of TWO ECW and Three ECW, to the extent held by the EC
     Ventures, in the case of (A) and (B) as adjusted pursuant to Section 10.3
                                                                  ------------
     hereof and Exhibit V of the Transaction Agreement PLUS (ii) $467,000,
     divided by (iii) $50. Each ECIP Partner's contribution is being made in
     exchange for a number of Investor Preferred Units equal to such Partner's
     percentage interest in ECIP times such aggregate number of Investor
     Preferred Units. The ECIP Partners acknowledge that the first quarterly
     distribution paid by Investor with respect to the Investor Preferred Units
     shall be with be with respect to such quarterly distribution period ending
     Nov. 16, 1998 and shall be prorated based on the number of days, commencing
     at 12:01 AM on the Closing Date, during such period for which such Units
     are outstanding.

                                  ARTICLE III

                  DUE DILIGENCE/CONDITION OF EC/ECA BUILDINGS
                  -------------------------------------------

     SECTION 3.1  TRANSFEREE PARTIES' INSPECTIONS AND DUE DILIGENCE.
                  ------------------------------------------------- 

               (A)  Due Diligence Approval.  Investor and Public Company each
                    ----------------------                                   
     hereby acknowledges and agrees that, as of the date of the execution of
     this Agreement, it has been given the full opportunity to review, inspect
     and investigate all of the files known or made available to Investor
     maintained by PPS on behalf of ECIP and PPS relating to the Property,
     EC/ECA Ventures and EC/ECA Buildings that it deems necessary to review (the
     "DOCUMENTS"), and has had an opportunity to conduct a thorough review,
     investigation, and inspection of the physical (including, without
     limitation, the seismic load bearing capabilities), environmental,
     economic, and legal conditions of the EC/ECA Buildings, the laws,
     regulations, covenants, conditions, and restrictions affecting or governing
     the use or operation of the EC/ECA Buildings, EC/ECA Ventures or the
     Property, the rentable square footage of the EC/ECA Buildings, and all
     other matters which a prudent buyer of partnership interests in a
     partnership that owns directly or indirectly commercial real property
     should review, inspect or investigate in the course of a due diligence
     review, and Investor and Public Company has each approved the condition of
     the EC/ECA Buildings, EC/ECA Ventures and the Property and the results of
     such review, inspection and investigation.

               (B)  Indemnity.  Investor and Public Company shall each
                    ---------                                         
     indemnify, protect, defend, and hold harmless ECIP (and each of the ECIP
     Partners) from and against any and all claims, demands, causes of action,
     losses, damages and liabilities, including, without limitation, personal
     injuries and property damage, and shall immediately discharge any liens and
     encumbrances, arising out of acts or omissions of Investor, Public Company
     or any of their agents, contractors, or representatives, committed on or
     about any of the EC/ECA Buildings in the course of any such Person's due
     diligence reviews, inspections and investigations, including, without
     limitation, claims, demands, causes of action, losses, damages and
     liabilities on the part of the tenants and lessees alleging breach of a
     Lease as a result of any such Person's acts or omissions.

                                      -5-

 
               (C)  Survivability.  The terms and provisions of this Section 3.1
                    -------------                                    -----------
     shall survive the Closing.

     SECTION 3.2  PROPERTY SOLD "AS IS".
                  --------------------- 

               (A)  "As Is, Where Is, With All Faults".  INVESTOR AND PUBLIC
                    ----------------------------------                      
     COMPANY EACH ACKNOWLEDGES AND AGREES THAT : (i) EXCEPT FOR THE EXCLUDED
     LIABILITIES, THE PROPERTY (AND THE RESULTING INTEREST IN THE EC/ECA
     BUILDINGS) IS SOLD, AND BUYER ACCEPTS THE PROPERTY (AND ITS CORRESPONDING
     INTEREST IN THE EC/ECA BUILDINGS) ON THE DATE HEREOF, "AS IS, WHERE IS,
     WITH ALL FAULTS"; (ii) EXCEPT FOR THE REPRESENTATIONS AND WARRANTIES OF
     ECIP AND THE ECIP PARTNERS SET FORTH IN ARTICLES 4 AND 5, RESPECTIVELY,
                                             ----------     -               
     TOGETHER WITH THE REPRESENTATIONS OF EACH ECIP PARTNER IN ANY CLOSING
     DOCUMENT IT DELIVERS PURSUANT TO SECTION 10.1 (HEREIN COLLECTIVELY CALLED
     THE "ECIP WARRANTIES"), NONE OF ECIP, THE ECIP PARTNERS, THEIR RESPECTIVE
     SALES AGENTS, NOR ANY PARTNER, OFFICER, DIRECTOR, EMPLOYEE, AGENT OR
     ATTORNEY OF ECIP OR THE ECIP PARTNERS, THEIR COUNSEL, BROKERS, OR SALES
     AGENTS, NOR ANY OTHER PERSON RELATED IN ANY WAY TO ANY OF THE FOREGOING
     (ALL OF WHICH PERSONS ARE HEREIN COLLECTIVELY CALLED THE "ECIP PARTIES")
     HAVE OR SHALL BE DEEMED TO HAVE MADE ANY VERBAL OR WRITTEN REPRESENTATIONS,
     WARRANTIES, PROMISES OR GUARANTEES (WHETHER EXPRESS, IMPLIED, STATUTORY OR
     OTHERWISE) TO INVESTOR OR PUBLIC COMPANY WITH RESPECT TO ECIP, THE
     PROPERTY, THE EC/ECA VENTURES OR THE EC/ECA BUILDINGS, ANY MATTER SET
     FORTH, CONTAINED OR ADDRESSED IN ANY DOCUMENTS REVIEWED BY INVESTOR OR
     PUBLIC COMPANY (INCLUDING, BUT NOT LIMITED TO, THE ACCURACY AND
     COMPLETENESS THEREOF) OR THE RESULTS OF INVESTOR'S AND PUBLIC COMPANY'S DUE
     DILIGENCE INVESTIGATIONS; AND (iii) INVESTOR AND PUBLIC COMPANY EACH HAS
     CONFIRMED INDEPENDENTLY ALL INFORMATION THAT IT CONSIDERS MATERIAL TO ITS
     ACQUISITION OF THE PROPERTY (AND THE RESULTING INTEREST IN THE EC/ECA
     BUILDINGS) AND THE TRANSACTIONS CONTEMPLATED HEREBY.  INVESTOR AND PUBLIC
     COMPANY EACH HEREBY SPECIFICALLY ACKNOWLEDGES THAT, EXCEPT FOR THE ECIP
     WARRANTIES, IT IS NOT RELYING ON (AND EACH OF THE ECIP PARTIES DOES HEREBY
                       ---                                                     
     DISCLAIM AND RENOUNCE) ANY REPRESENTATIONS OR WARRANTIES OF ANY KIND OR
     NATURE WHATSOEVER, WHETHER ORAL OR WRITTEN, EXPRESS, IMPLIED, STATUTORY OR
     OTHERWISE, FROM ANY OF THE ECIP PARTIES, AS TO:  (1) THE OPERATION OF THE
     PROPERTY, ECIP AND THE EC/ECA BUILDINGS OR THE INCOME POTENTIAL, USES, OR
     MERCHANTABILITY OR 

                                      -6-

 
     FITNESS OF ANY PORTION OF THE PROPERTY OR EC/ECA BUILDINGS FOR A PARTICULAR
     PURPOSE; (2) THE PHYSICAL CONDITION OF THE EC/ECA BUILDINGS OR THE
     CONDITION OR SAFETY OF THE EC/ECA BUILDINGS OR ANY IMPROVEMENTS THEREON;
     (3) THE PRESENCE OR ABSENCE, LOCATION OR SCOPE OF ANY HAZARDOUS MATERIALS
     IN, AT, OR UNDER THE EC/ECA BUILDINGS; (4) THE ACCURACY OF ANY STATEMENTS,
     CALCULATIONS OR CONDITIONS STATED OR SET FORTH IN ECIP'S OR PPS'S BOOKS AND
     RECORDS CONCERNING THE PROPERTY AND/OR THE EC/ECA BUILDINGS OR SET FORTH IN
     ANY OF THE ECIP PARTNERS' OFFERING MATERIALS WITH RESPECT TO THE PROPERTY,
     ECIP AND/OR THE EC/ECA BUILDINGS; (5) THE DIMENSIONS OF THE EC/ECA
     BUILDINGS OR THE ACCURACY OF ANY FLOOR PLANS, SQUARE FOOTAGE, LEASE
     ABSTRACTS, SKETCHES, REVENUE OR EXPENSE PROJECTIONS RELATED TO THE EC/ECA
     BUILDINGS; (6) THE OPERATING PERFORMANCE, THE INCOME AND EXPENSES OF THE
     PROPERTY AND/OR EC/ECA BUILDINGS OR THE ECONOMIC STATUS OF THE PROPERTY
     AND/OR EC/ECA BUILDINGS; (7) THE ABILITY OF INVESTOR AND PUBLIC COMPANY TO
     OBTAIN ANY AND ALL NECESSARY GOVERNMENTAL APPROVALS OR PERMITS FOR THE
     INTENDED USE AND DEVELOPMENT OF THE EC/ECA BUILDINGS; AND (8) THE LEASING
     STATUS OF THE EC/ECA BUILDINGS OR THE INTENTIONS OF ANY PERSONS WITH
     RESPECT TO THE NEGOTIATION AND/OR EXECUTION OF ANY LEASE FOR ANY PORTION OF
     THE EC/ECA BUILDINGS. INVESTOR AND PUBLIC COMPANY EACH FURTHER ACKNOWLEDGES
     AND AGREES THAT, EXCEPT FOR THE ECIP WARRANTIES, THE ECIP PARTIES ARE UNDER
     NO DUTY TO MAKE ANY AFFIRMATIVE DISCLOSURES OR INQUIRY REGARDING ANY MATTER
     WHICH MAY BE KNOWN TO ANY OF THE ECIP PARTIES.

               (B)  Release and Indemnity.  INVESTOR'S AND PUBLIC COMPANY'S
                    ---------------------                                  
     RELEASE AND INDEMNITY:

                    (i) INVESTOR AND PUBLIC COMPANY EACH HEREBY ASSUMES ALL
          RISKS WITH RESPECT TO THE PROPERTY (AND ITS RESULTING INTEREST IN THE
          EC/ECA BUILDINGS), KNOWN AND UNKNOWN, SUSPECTED AND UNSUSPECTED,
          EXCEPTING ONLY THE EXCLUDED LIABILITIES (AS DEFINED IN SECTION 3.2 (b)
          (ii) BELOW). EXCEPT AS OTHERWISE EXPRESSLY PROVIDED IN SECTION
          3.2(b)(ii) BELOW WITH RESPECT TO EXCLUDED LIABILITIES AND SECTION
          3.2(b)(iii) BELOW WITH RESPECT TO THE ECIP PARTIES' WARRANTIES,
          INVESTOR, PUBLIC COMPANY AND THEIR AGENTS, EMPLOYEES, AFFILIATES,
          SUCCESSORS AND ASSIGNS (COLLECTIVELY, "TRANSFEREE PARTIES"), SHALL BE
          SOLELY LIABLE FOR, AND SHALL INDEMNIFY, DEFEND, PROTECT AND HOLD
          HARMLESS THE ECIP PARTIES FROM ANY AND ALL CLAIMS, DEMANDS, CAUSES OF
          ACTION, LOSSES, LIABILITIES, COSTS AND 

                                      -7-

 
          EXPENSES (INCLUDING REASONABLE ATTORNEYS' FEES) AT LAW OR IN EQUITY,
          KNOWN OR UNKNOWN, SUSPECTED OR UNSUSPECTED, RELATING TO BODILY INJURY,
          DEATH, PROPERTY DAMAGE, ECONOMIC LOSS, OR OTHER DAMAGES SUFFERED BY
          ANY OF THE ECIP PARTIES ARISING OUT OF OR RELATING TO THE PROPERTY
          AND/OR THE EC/ECA BUILDINGS , INCLUDING, WITHOUT LIMITATION, THE
          PHYSICAL, ENVIRONMENTAL, ECONOMIC, LEGAL OR OTHER CONDITION OF ANY OF
          THE EC/ECA BUILDINGS, INCLUDING, WITHOUT LIMITATION, ANY SUCH CLAIMS
          OR LIABILITIES RELATING TO THE PRESENCE, DISCOVERY OR REMOVAL OF ANY
          HAZARDOUS MATERIALS IN, AT, ABOUT OR UNDER ANY OF THE EC/ECA
          BUILDINGS, OR FOR, CONNECTED WITH OR ARISING AFTER THE DATE HEREOF OUT
          OF ANY AND ALL CLAIMS OR CAUSES OF ACTION BASED UPON CERCLA
          (COMPREHENSIVE ENVIRONMENTAL RESPONSE, COMPENSATION, AND LIABILITY ACT
          OF 1980, 42 U.S.C. (S)(S)9601 ET SEQ., AS AMENDED BY SARA [SUPERFUND
          AMENDMENT AND REAUTHORIZATION ACT OF 1986] AND AS MAY BE FURTHER
          AMENDED FROM TIME TO TIME), THE RESOURCE CONSERVATION AND RECOVERY ACT
          OF 1976, 42 U.S.C. (S)(S)6901 ET SEQ., OR ANY RELATED CLAIMS OR CAUSES
          OF ACTION OR ANY OTHER FEDERAL OR STATE BASED STATUTORY OR REGULATORY
          CAUSES OF ACTION FOR ENVIRONMENTAL CONTAMINATION AT, IN OR UNDER ANY
          OF THE EC/ECA BUILDINGS (HEREINAFTER "TRANSFEREE PARTY-COVERED
          CLAIMS").

                    (ii)  NOTWITHSTANDING THE FOREGOING, THE TERM "TRANSFEREE
          PARTY-COVERED CLAIMS" SHALL EXCLUDE, AND NEITHER INVESTOR NOR THE
          PUBLIC COMPANY SHALL ASSUME, ANY AND ALL OBLIGATIONS AND LIABILITIES
          ("EXCLUDED LIABILITIES") ARISING FROM OR IN CONNECTION WITH THE USE,
          OWNERSHIP OR OPERATION OF ECIP, THE PROPERTY, THE EC/ECA VENTURES
          AND/OR EC/ECA BUILDINGS ACCRUING ON OR PRIOR TO THE CLOSING DATE OTHER
          THAN (A) OBLIGATIONS AND LIABILITIES ASSUMED IN WRITING BY INVESTOR
          AND PUBLIC COMPANY IN CONNECTION WITH THE LEASES AND/OR CONTRACTS AND
          ALL OTHER OBLIGATIONS AND LIABILITIES THAT THE INVESTOR EXPRESSLY
          ASSUMES IN WRITING (OTHER THAN BY WAY OF ACCEPTING THE ASSIGNMENT OF
          THE PROPERTY) AT OR PRIOR TO THE CLOSING, (B) OBLIGATIONS AND
          LIABILITIES FOR WHICH INVESTOR HAS RECEIVED A PRORATION CREDIT
          PURSUANT TO EXHIBIT V OF THE TRANSACTION AGREEMENT, AND (C)
          OBLIGATIONS AND LIABILITIES RELATING IN ANY WAY TO THE PHYSICAL OR
          ENVIRONMENTAL CONDITION OF THE EC/ECA BUILDINGS OTHER THAN ANY CLAIMS
          MADE BY ,OR CAUSES OF ACTION BROUGHT BY, ANY THIRD PARTY UNRELATED TO
          INVESTOR 

                                      -8-

 
          OR PUBLIC COMPANY OR ANY OF THEIR AFFILIATES WHERE THE INJURY OR
          DAMAGE GIVING RISE TO SUCH CLAIM OR CAUSE OF ACTION AROSE OR OCCURRED
          DURING THE PERIOD PRIOR TO THE CLOSING DATE.

                    ii(ii)  TRANSFEREE PARTIES EACH HEREBY GENERALLY AND FULLY
          RELEASE THE ECIP PARTIES FROM ANY AND ALL STATEMENTS OR OPINIONS
          HERETOFORE MADE, OR INFORMATION FURNISHED IN CONNECTION WITH THE
          TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT, BY THE ECIP PARTIES TO
          ANY OF THE TRANSFEREE PARTIES, EXCEPT FOR THE ECIP WARRANTIES; AND
          FROM ANY AND ALL TRANSFEREE PARTY-COVERED CLAIMS, KNOWN OR UNKNOWN,
          SUSPECTED OR UNSUSPECTED.

                    WITH RESPECT TO THE RELEASES AND WAIVERS CONTAINED IN THIS
                                                                              
          SUBSECTION 3.2(b)(iii), THE TRANSFEREE PARTIES EXPRESSLY WAIVE THE
          ----------------------                                            
          BENEFITS OF SECTION 1542 OF THE CALIFORNIA CIVIL CODE, WHICH PROVIDES
          AS FOLLOWS:

                         "A GENERAL RELEASE DOES NOT EXTEND TO CLAIMS WHICH THE
               CREDITOR DOES NOT KNOW OR SUSPECT TO EXIST IN HIS FAVOR AT THE
               TIME OF EXECUTING THE RELEASE, WHICH IF KNOWN BY HIM MUST HAVE
               MATERIALLY AFFECTED HIS SETTLEMENT WITH THE DEBTOR."

                    INVESTOR AND PUBLIC COMPANY HAS EACH BEEN ADVISED BY ITS
          LEGAL COUNSEL AND UNDERSTANDS THE SIGNIFICANCE OF THIS WAIVER OF
          SECTION 1542 RELATING TO UNKNOWN, UNSUSPECTED AND CONCEALED CLAIMS.
          BY ITS INITIALS BELOW, EACH OF INVESTOR AND PUBLIC COMPANY
          ACKNOWLEDGES THAT IT FULLY UNDERSTANDS, APPRECIATES, AND ACCEPTS ALL
          OF THE TERMS OF THIS SUBSECTION 3.2(b)(iii).
                               ---------------------- 

                                         _________________________
                                         Investor's Initials

                                         _________________________
                                         Public Company's Initials

                    (iv) NOTWITHSTANDING THE FOREGOING, THE ECIP PARTNERS SHALL
          BE SOLELY LIABLE FOR, AND SHALL INDEMNIFY, DEFEND (AND CONTROL THE
          RESOLUTION OF ), 

                                      -9-

 
          PROTECT AND HOLD HARMLESS INVESTOR AND PUBLIC COMPANY FROM ANY AND ALL
          CLAIMS, DEMANDS, CAUSES OF ACTION, LOSSES, LIABILITIES, COSTS AND
          EXPENSES (INCLUDING REASONABLE ATTORNEY'S FEES) AT LAW OR IN EQUITY,
          KNOWN OR UNKNOWN, SUSPECTED OR UNSUSPECTED, RELATING TO BODILY INJURY,
          DEATH, PROPERTY DAMAGE, ECONOMIC LOSS, OR OTHER DAMAGES SUFFERED BY
          ECIP OR THE PROPERTY OR THE EC/ECA VENTURES OR THE EC/ECA BUILDINGS
          ARISING OUT OF OR RELATING TO THE EXCLUDED LIABILITIES.

               (C)  Provisions Material.  Investor and Public Company each
                    -------------------                                   
     acknowledges and agrees that the provisions of this Article 3 were a
                                                         ---------       
     material factor in the acceptance of the ECIP Contribution Value by the
     ECIP Partners and, while the ECIP Partners have made the Documents
     available to Investor and Public Company and cooperated with Investor and
     Public Company in their due diligence investigations and inspections, the
     ECIP Partners are unwilling to contribute the Property unless the ECIP
     Parties are expressly released as set forth in Subsection 3.2(b)(ii).
                                                    --------------------- 

               (D)  Survivability.  Notwithstanding anything to the contrary
                    -------------                                           
     herein, the provisions of this Section 3.2 shall survive the Closing and
                                    -----------                              
     shall not be merged in any contribution of the Property.

                                   ARTICLE IV

         REPRESENTATIONS AND WARRANTIES AS TO THE PROPERTY, THE EC/ECA
         -------------------------------------------------------------
                       VENTURES AND THE EC/ECA BUILDINGS
                       ---------------------------------

     SECTION 4.1  GENERAL STATEMENT.  The ECIP Partners make the representations
                  -----------------                                             
and warranties with respect to ECIP, the Property, the EC/ECA Ventures and the
EC/ECA Buildings to Investor and Public Company which are set forth in this
                                                                           
Article IV.  All representations and warranties set forth in Section 4.3 shall
- ----------                                                   -----------      
survive the Closing (and none shall merge into any instrument of conveyance) for
the period of time set forth in Article VIII and shall be subject to the
                                ------------                            
limitations of Section 11.1 (provided, however, that the representations in
               ------------                                                
Section 4.3(a), (b), (c) and (d) shall not be subject to the Building Maximum
- --------------------------------                                             
Liability Amount in Section 11.1 or the $43,000,000 limitation of Section 12.1.2
                    ------------                                                
of the Transaction Agreement) ,and all representations and warranties set forth
in Section 4.5 hereof shall, subject to the limitations of Section 11.1, survive
   -----------                                             ------------         
the Closing (and none shall merge into any instrument of conveyance) for the
period of any relevant statute of limitations therefor. All  Representations and
warranties are made as of the date of this Agreement.

     SECTION 4.2  ATTRIBUTION.  For purposes of this Agreement, the words
                  -----------                                            
"knowledge of ECIP" or "ECIP's knowledge" shall mean the actual and not
constructive knowledge of Richard E. Salomon, President of Rockmark Corporation,
the general partner of ECIP, Thomas Hendrian and John Syage of PPS and John
Treice of Prudential Insurance Company of America (the "ECIP KNOWLEDGE PARTY").
The individuals who are an ECIP Knowledge Party shall have no liability of any
kind in their capacity as an ECIP Knowledge Party.  Any fact, matter or other

                                      -10-

 
statement shall not be deemed to be within the knowledge of ECIP or ECIP's
knowledge unless the ECIP Knowledge Party has actual knowledge of such fact,
matter or other statement.  Notwithstanding the foregoing, the representations
and warranties made by the ECIP Partners under Section 4.5 below are intended to
                                               -----------                      
be absolute in nature and are not limited by the knowledge or attribution
limitations of this Section 4.2.
                    ----------- 

     SECTION 4.3  REPRESENTATIONS AND WARRANTIES RE: ECIP BUSINESS AND EC/ECA
                  -----------------------------------------------------------
BUILDINGS.  The ECIP Partners hereby severally (and not jointly) represent and
- ---------                                                                     
warrant to Investor except as set forth on any Schedule attached hereto and
                                               --------                    
referred to below and Public Company that:

               (A) The execution and delivery of this Agreement and the other
     documents to be executed by ECIP in connection herewith, and the
     consummation of the transactions described in this Agreement and such
     documents do not require, to the knowledge of ECIP, the consent or approval
     of any governmental authority, nor to ECIP's knowledge does the execution
     and delivery of this Agreement and the other documents to be executed by
     ECIP in connection herewith violate, in any way material to the
     transactions described herein, any contract or agreement to which ECIP is a
     party or (to the knowledge of ECIP) any governmental or judicial order,
     judgment, decree, statute, law, rule or regulation applicable to ECIP, any
     EC/ECA Venture or any of the EC/ECA Buildings and this Agreement and all
     documents to be executed by ECIP in connection with the transactions
     described herein constitute the legal, valid and binding obligations of
     ECIP.  The Property (consisting of the partnership interests in ECIP of all
     of the ECIP Partners) constitutes all of the outstanding partnership
     interests in ECIP, and ECIP has no obligation or commitment of any kind or
     nature to issue any additional partnership interests.

               (B) ECIP has full and, except for the Transaction Documents and
     the Existing Mortgages, unencumbered title to the interests in the EC/ECA
     Ventures as indicated in the EC/ECA Venture Partnership Agreements as in
     effect on the date of the Transaction Agreement and has no other assets
     other than the ECIP Lease and related subleases annexed as Exhibit H and
     the "Embarcadero Center" trademark; ECIP has no liabilities other than
     those incident to or arising out of or in connection with the EC/ECA
     Ventures, the EC/ECA Buildings, the Transaction Documents and the Existing
     Mortgages.

               (C)  To ECIP's knowledge, neither ECIP nor any EC/ECA Venture is
     a party to, or bound by, any unexpired, undischarged or unsatisfied
     contract, agreement, indenture, mortgage (other than the Existing
     Mortgages), debenture, note or other instrument under the terms of which
     performance by ECIP or the ECIP Partners in accordance with the terms and
     provisions of this Agreement will be a default or an event of acceleration,
     or grounds for termination, and whereby such default, acceleration or
     termination would reasonably be expected to have a material adverse effect
     on the timely performance by ECIP or the ECIP Partners of their obligations
     under this Agreement and the other documents to be executed by ECIP or the
     ECIP Partners in connection herewith, 

                                      -11-

 
     nor does the execution of this Agreement or the other documents to be
     executed by ECIP in connection herewith, or the consummation of the
     transactions contemplated hereby and thereby, violate the partnership
     agreements of ECIP or any EC/ECA Venture or constitute a breach thereunder.

               (D) Neither  ECIP nor the EC/ECA Ventures have any employees.

               (E) To ECIP's knowledge, except as listed on Schedule 4.3(e),
                                                            --------------- 
     neither ECIP nor any of the EC/ECA Ventures have received any written
     notice of pending or threatened litigation, judgment, arbitration,
     investigation or proceeding against ECIP, the EC/ECA Ventures or the EC/ECA
     Buildings that, if determined adversely, would reasonably be expected to
     have a material adverse effect on the operation, use or value of ECIP, any
     EC/ECA Venture or any EC/ECA Building or on the Investor's ability to
     obtain any financing necessary to close the transactions contemplated by
     this Agreement, nor has ECIP or any EC/ECA Venture received any explicit
     oral notice of any such threatened litigation, judgment, arbitration,
     investigation or proceeding.

               (F) To ECIP's knowledge, except as listed on Schedule 4.3(f),
                                                            --------------- 
     there are no Claims or liabilities affecting ECIP, the EC/ECA Ventures or
     EC/ECA Buildings that have not been previously disclosed in writing to
     Investor, Public Company or any of their Affiliates which would be binding
     upon Investor, ECIP or the EC/ECA Ventures after Closing and have a
     material adverse effect on the operation, use or value of ECIP, any EC/ECA
     Venture, the Property or any EC/ECA Building or on Investor's ability to
     obtain any financing necessary to close the transactions contemplated by
     this Agreement.

               (G) To ECIP's knowledge, except as listed on Schedule 4.3(g),
                                                            --------------- 
     neither ECIP nor the EC/ECA Ventures has received any written notice from
     any governmental authority of any special assessment, pending condemnation,
     and to ECIP's knowledge neither ECIP or the EC/ECA Ventures is in violation
     or has received notice of violation of any zoning, building, fire, or
     health code, statute, ordinance, rule or regulation applicable to the
     EC/ECA Buildings that would reasonably be expected to have a material
     adverse effect on the operation, use or value of any EC/ECA Building or on
     the Investor's ability to obtain any financing necessary to close the
     transactions contemplated by this Agreement.

               (H) To ECIP's knowledge, neither ECIP nor any other Person has
     entered into any written equipment leases, service contracts or other such
     contracts or agreements affecting ECIP, any EC/ECA Venture or any EC/ECA
     Building which will remain in effect after the Closing Date and which will
     be binding upon Investor, ECIP or the EC/ECA Ventures after the Closing
     Date and which are not terminable or cancelable upon thirty (30) days
     notice (collectively, "CONTRACTS") other than those listed on 
Schedule 4.3(h) attached hereto.
- --------------                 

               (I) To ECIP's knowledge, the only Leases which will encumber the
     EC/ECA Buildings after the Closing are listed on Scheddule 4.3(i) attached
                                                      ----------------         
     hereto.

                                      -12-

 
               (J) To ECIP's knowledge, there are no agreements affecting the
     EC/ECA Buildings with third parties for the provision of leasing brokerage
     services or under which leasing commissions would become due from and after
     the Closing, except as set forth on Schedule 4.3(j).
                                         --------------- 

               (K) To ECIP's knowledge, neither ECIP nor any EC/ECA Venture is
     in default and no such party has received any written notice of any
     defaults under the terms of any of the Contracts, Leases or Encumbrance
     Documents that would have a material adverse effect on the use, operation
     or value of ECIP, any EC/ECA Venture or any EC/ECA Building after the
     Closing or on the Investor's ability to obtain any financing necessary to
     close the transactions contemplated by this Agreement, except as set forth
     on Exhibit D and Schedule 4.3(k).  As used herein, the term "ENCUMBRANCE
        ---------     ---------------                                        
     DOCUMENTS" shall mean, collectively, all mortgages, deeds of trust,
     easements and other material agreements appurtenant to or burdening the
     EC/ECA Buildings.

               (L) To ECIP's knowledge, no rent or other amounts (other than
     security deposits) have been prepaid under any of the Leases, Contracts or
     Encumbrance Documents more than thirty (30) days in advance of the due
     dates thereof, except as set forth on Schedule 4.3(l) or, in the case of
                                           ---------------                   
     Contracts, the proration schedule attached to Exhibit V of the Transaction
     Agreement (which will be provided on the date required).

     SECTION 4.4  QUALIFICATIONS TO REPRESENTATIONS AND WARRANTIES.  To the
                  ------------------------------------------------         
extent that any of the representations or warranties of the ECIP Partners under
                                                                               
Section 4.3 are known to Investor, Public Company or any of their Affiliates to
- -----------                                                                    
be inaccurate on the Closing Date and Investor nevertheless closes the
transactions contemplated by this Agreement, such representation(s) and
warranty(ies) shall be deemed modified to the extent of such known inaccuracy
and the ECIP Partners shall not be deemed in breach of the representation or
warranty.  Notwithstanding anything to the contrary stated or implied herein and
in furtherance of the foregoing provisions of this Section 4.4, the ECIP
                                                   -----------          
Partners shall have no liability for or with respect to any representation or
warranty (or breach thereof) from and after the Closing if, prior to the
Closing, the Investor, Public Company or any of their Affiliates discovers or
learns of information (from whatever source, including, without limitation,
ECIP, the ECIP Partners or any of their employees), or any reports, instruments
or other documentation which were reviewed by or made available for review by
Investor, Public Company or any of their Affiliates in connection with the
transactions contemplated hereby (including, without limitation, any reports,
surveys, and other due diligence documentation procured independently by
Investor, Public Company or any of their Affiliates in connection with the
transactions contemplated hereby) contain information that contradicts such
representation and warranty, or renders such representation and warranty untrue
or incorrect.  Notwithstanding anything to the contrary stated in this Agreement
or in any other Transaction Document, (a) Investor and Public Company have been
previously informed that One EC, Two EC and the Four EC Hyatt Retail Space
contain asbestos containing material ("ACM"), (b) each representation and
warranty set forth herein is modified as necessary to except the existence of
ACM in One EC, Two EC and the portion of the Hyatt Regency retail space
(described more specifically in Schedule 4.4) leased by Four EC (the "Four EC
Hyatt Retail Space") and (c) the ECIP Partners shall not be deemed to be in
breach or 

                                      -13-

 
default of any of the representations and warranties hereunder as a result of
the presence or existence of ACM within One EC, Two EC or Four EC (with respect
only to the Four EC Hyatt Retail Space).

     SECTION 4.5  DUE FORMATION, ETC. ECIP is a limited partnership duly formed
                  ------------------                                           
and existing under the laws of the State of California and is not insolvent, and
has all necessary power and authority to execute and deliver this Agreement and
all documents executed by it in connection herewith and to perform all its
obligations hereunder and thereunder.  This Agreement has been duly authorized
by all requisite partnership action on the part of ECIP.  ECIP is not a Person
other than a United States Person within the meaning of the Code and the
transactions contemplated herein are not subject to the withholding provisions
of section 3406 or subchapter A of Chapter 3 of the Code.  To ECIP's knowledge,
each EC/ECA Venture is a duly formed general partnership under the laws of the
State of California, and each such partnership conducts business in accordance
with all statutes, laws, rules and regulations applicable to it, and does not
violate or fail to comply with, any statutes, laws, rules or regulations
applicable to it that would have a material adverse effect on the business or
operations of any EC/ECA Venture or on the Investor's ability to obtain any
financing necessary to close the transactions contemplated by the Transaction
Agreement.

                                   ARTICLE V

               REPRESENTATIONS AND WARRANTIES AS TO ECIP PARTNERS
               --------------------------------------------------

     SECTION 5.1  GENERAL STATEMENT.  Each of the ECIP Partners, singly and not
                  -----------------                                            
jointly, hereby makes the representations and warranties to Investor and Public
Company which are set forth in this Article V.  All representations and
                                    ---------                          
warranties set forth in Article 5 shall, subject to the limitations of 
                        --------- 
Section 11.1, survive the Closing (and none shall merge into any instrument of
- ------------                                                                  
conveyance) for the period of any relevant statute of limitations therefor.
Representations and warranties of the ECIP Partners are made as of the date of
this Agreement.

     SECTION 5.2  ATTRIBUTION.  For purposes of this Agreement, the words
                  -----------                                            
"knowledge of ECIP Partner" or "ECIP Partner's knowledge" shall mean the actual
and not constructive knowledge of the particular ECIP Partner, its Affiliates
and its officers, agents and employees in the context used (the "ECIP PARTNER
KNOWLEDGE PARTIES") and shall not be construed to refer to the knowledge of any
other ECIP Partner or any other ECIP Partner's Affiliates, officers, agents or
employees or to impose or have imposed upon any ECIP Partner any duty to
investigate the matters to which such knowledge, or absence thereof, pertains.
Any fact, matter or other statement shall not be deemed to be within the
knowledge of the ECIP Partner or ECIP Partner's knowledge unless the ECIP
Partner Knowledge Parties for such ECIP Partner have actual knowledge of such
fact, matter or other statement.

     SECTION 5.3  DUE ORGANIZATION; AUTHORIZATION; OTHER MATTERS.  Each ECIP
                  ----------------------------------------------            
Partner hereby, singly and not jointly, represents and warrants to Public
Company and Investor solely as to itself as an ECIP Partner as follows:

                                      -14-

 
               (A) Such ECIP Partner is, if it is other than an individual, duly
     organized or formed, is validly existing and is in good standing under the
     laws of its jurisdiction of organization, and is qualified to do business
     and in good standing in all jurisdictions where such qualification is
     necessary to carry on its business as now conducted, except where the
     failure to so qualify would not have a material adverse effect on the
     ability of such ECIP Partner to perform its obligations under this
     Agreement.

               (B) Such ECIP Partner has full power and authority to enter into
     this Agreement and to consummate the transactions contemplated hereby.

               (C) Such ECIP Partner has, and will contribute to Investor at the
     Closing, full, unencumbered title to all of its interest in ECIP. Such ECIP
     Partner's percentage interest in ECIP as of the date is set forth in the
     Assignment of ECIP Partnership Interests being delivered concurrently
     herewith.  Such ECIP Partner owns beneficially and of record, free and
     clear of any claim, lien, pledge, voting agreement, option, charge,
     security interest, mortgage, deed of trust, encumbrance, rights of
     assignment, purchase or other restrictions or rights of any kind, nature or
     description (collectively, "Encumbrances"), and has full power and
     authority to convey free and clear of any Encumbrances, its interest in
     ECIP and, upon delivery of the Assignment attached hereto, the Investor or
     its designee will acquire good and valid title to such interest in ECIP,
     free and clear of any Encumbrance other than as may have been created under
     this agreement.  Such ECIP Interest has been validly issued.

               (D) The execution, delivery and performance by such ECIP Partner
     of this Agreement has been duly and validly approved by all necessary
     partnership, corporate or other applicable action and no other actions or
     proceedings on the part of such ECIP Partner or its shareholders, partners
     or other ECIP Partners, are necessary to authorize this Agreement and the
     transactions contemplated hereby and thereby.  No consent, waiver,
     approval, or authorization of, or filing, registration, or qualification
     with, or notice to, any governmental instrumentality or any other Person
     (including, without limitation, the other ECIP Partners) is required to be
     made, obtained, or given in connection with the execution, delivery, and
     performance of this Agreement by such ECIP Partner, except where the
     failure to do so would not have a material adverse effect on such
     execution, delivery or performance.  This Agreement constitutes, and any
     other documents to be executed by such ECIP Partner pursuant to this
     Agreement when executed will constitute, legal, valid and binding
     obligations of such ECIP Partner, enforceable against such ECIP Partner in
     accordance with its terms, except as such enforceability may be limited by
     applicable bankruptcy, insolvency, moratorium, reorganization or similar
     laws in effect which affect the enforcement of creditors' rights generally
     and by equitable limitations on the availability of specific remedies.

               (E) The execution and delivery of this Agreement, and the
     performance by such ECIP Partner under this Agreement, do not and will not
     conflict with or result in a breach of (with or without the passage of time
     or notice or both) the terms of any of such ECIP Partner's constituent
     documents (if any), any judgment, order 

                                      -15-

 
     or decree of any governmental authority binding on such ECIP Partner, and,
     to such ECIP Partner's knowledge, do not breach or violate any applicable
     law, rule or regulation of any governmental authority. Except as may be
     provided in the Existing Mortgages, the execution, delivery and performance
     by such ECIP Partner under this Agreement will not result in a breach or
     violation of (with or without the passage of time or notice or both) the
     terms or provisions of, or constitute a default under, any indenture,
     mortgage, deed of trust, loan agreement, the partnership agreement of ECIP,
     any of the EC/ECA Venture Partnership Agreements, or any other agreement or
     instrument to which such ECIP Partner is a party or by which such ECIP
     Partner is bound.

               (F) Such ECIP Partner, if other than an individual, is organized
     and, to such ECIP Partner's knowledge, has conducted its business in
     accordance with all applicable laws, to the extent applicable, the failure
     or the violation of which could reasonably be expected to have a material
     adverse effect on the ability of such ECIP Partner, in its individual
     capacity, to execute, deliver or perform under this Agreement or to
     consummate the transactions contemplated hereby.

     SECTION 5.4  SECURITIES LAWS.  Subject to the provisions of this Agreement,
                  ---------------                                               
each ECIP Partner hereby represents and warrants that such ECIP Partner is
acquiring the Investor Preferred Units for its own account and not with a view
to or for sale in connection with any distribution thereof within the meaning of
the Securities Act.  Such ECIP Partner understands that the Investor Preferred
Units (and, subject to the Registration Rights Agreement, the Shares issuable
upon exchange thereof) will not be registered under the Securities Act or any
state securities laws, will be offered and sold pursuant to exemptions therefrom
and cannot be resold without registration thereunder or exemption therefrom.
Such ECIP Partner represents that it has sufficient knowledge and experience in
financial and business matters to enable it to evaluate the merits and risks of
investment in the Investor Preferred Units (and the Shares that may be issued in
lieu of redemption thereof).  Such ECIP Partner has the ability to bear the
economic risk of acquiring the Investor Preferred Units.  Such ECIP Partner has
been supplied with, or had access to, information to which a reasonable investor
would attach significance in making investment decisions, including, but not
limited to, all information as it has requested, to answer all of its inquiries
about Public Company and Investor, and to enable it to make its decision to
acquire the Investor Preferred Units (and the Shares that may be issued in lieu
of redemption thereof).  The Securities shall, if represented by certificates,
contain a prominent legend with respect to the foregoing restrictions.  Such
ECIP Partner represents and warrants that he, she or it is an "accredited
investor" as such term is defined in Rule 501 under the Securities Act.

                                   ARTICLE VI

                REPRESENTATIONS AND WARRANTIES OF PUBLIC COMPANY
                ------------------------------------------------

     SECTION 6.1  GENERAL STATEMENT.  Public Company hereby makes the
                  -----------------                                  
representations and warranties to ECIP and each ECIP Partner which are set forth
in this Article VI.  All representations and warranties set forth in Section 6.4
        ----------                                                   -----------
shall survive the Closing (and none shall merge into any instrument of
conveyance) for the period of any relevant statute of limitations therefor.
Representations and warranties of Public Company are made as of the date of this
Agreement.

                                      -16-

 
     SECTION 6.2  ATTRIBUTION.  For purposes of the representations and
                  -----------                                          
warranties of Public Company set forth in this Article VI only, the words
"knowledge of Public Company" or "Public Company's knowledge" shall mean the
actual and not constructive knowledge of Mortimer Zuckerman, Edward Linde and
Thomas O'Connor (collectively, the "PUBLIC COMPANY KNOWLEDGE PARTIES").  Any
fact, matter or other statement shall not be deemed to be within the knowledge
of Public Company or Public Company's knowledge unless the Public Company
Knowledge Parties, or any of them, have actual knowledge of such fact, matter or
other statement.  Notwithstanding the foregoing, the representations and
warranties made by Public Company under Section 6.4 below are intended to be
                                        -----------                         
absolute in nature and are not limited by the knowledge or attribution
limitations of this Section 6.2.
                    ----------- 

     SECTION 6.3  REPRESENTATIONS AND WARRANTIES RE: PUBLIC COMPANY BUSINESS AND
                  --------------------------------------------------------------
OPERATIONS.  Public Company hereby represents and warrants as follows:
- ----------                                                            

               (A) Public Company is organized and, to Public Company's
     knowledge, has conducted its business in accordance with applicable laws,
     to the extent applicable, the failure or the violation of which would
     reasonably be expected to have a material adverse effect on the results of
     operations of the Public Company.

               (B) There are no actions, suits or proceedings pending and, to
     Public Company's knowledge, no such proceedings are threatened or
     contemplated by governmental authorities or others, which would reasonably
     be expected to either (i) question the validity of this Agreement or the
     consummation of the transactions contemplated hereby, the issuance of the
     Shares (including the Shares that may be issued in lieu of redemption of
     Investor Preferred Units), any other agreements contemplated hereby or any
     actions taken pursuant to any of the foregoing or (ii) result in any
     material adverse change in the condition, financial or otherwise, or in the
     earnings, business affairs, management or business prospects of Public
     Company.  As of the date hereof, there is no  action or suit against Public
     Company pending or threatened by any Person which would reasonably be
     expected to have a material and adverse effect on Public Company.

               (C) The Public Company has filed with the Securities and Exchange
     Commission (the "Commission") all reports required by the Exchange Act to
     be filed by the Company (collectively, and in each case including all
     exhibits and schedules thereto and documents incorporated by reference
     therein, the "SEC Documents").  As of their respective filing dates (or if
     amended, revised or superseded by a subsequent filing with the Commission,
     then on the date of such subsequent filing), the SEC Documents complied in
     all material respects with the requirements of the Securities Act or the
     Exchange Act, as the case may be, and none of the SEC Documents (including
     any and all financial statements included therein) as of such dates
     contained any untrue statement of a material fact or omitted to state a
     material fact required to be stated therein or 

                                      -17-

 
     necessary in order to make the statements therein, in light of the
     circumstances under which they are made, not misleading. The consolidated
     financial statements of Public Company included in all SEC Documents,
     including any amendments thereto, comply as to form in all material
     respects with applicable accounting requirements and the published rules
     and regulations of the Commission with respect thereto. Since most recently
     filed SEC Document, there has not occurred or arisen any change in or event
     affecting Public Company that has had or would reasonably be expected to
     have a material adverse effect on the results of operations of Public
     Company.

               (D) No proceeding or other action has been commenced or
     undertaken relating to the dissolution or merger of Public Company and none
     is presently contemplated except that this representation shall not apply
     to any merger of another entity with and into Public Company that meets the
     criteria of Section 251(f) of the Delaware General Corporation Law for
     consummating a merger without a vote of stockholders.

               (E) As of the date of this Agreement, the authorized capital
     securities of Public Company consists of Preferred Stock, $.01 par value,
     50,000,000 Shares authorized, none issued or outstanding, Excess Stock,
     $.01 par value, 150,000,000 shares authorized, none issued or outstanding,
     and 250,000,000 Shares of common stock, $0.01 par value per share, of which
     63,526,785 Shares are currently issued and outstanding.  Except as
     contemplated pursuant to this Agreement, and except for (i) any Shares that
     may be issued in lieu of redemption of outstanding units of limited
     partnership in Investor and (ii) any Shares or units of limited partnership
     in Investor which may be issued in accordance with agreements that have
     been described in or filed with the SEC Filings or otherwise disclosed on
     Schedule 6.3(e), there are no securities convertible or exchangeable for
     Shares or any rights or options to subscribe for or purchase any Shares or
     securities convertible or exchangeable for Shares.  All of the outstanding
     Shares have been duly and validly authorized and issued and are fully paid
     and non-assessable.  All of the outstanding Shares have been issued in
     compliance with all applicable federal and state securities laws.

               (F) The Shares (including the Shares issuable upon exchange of
     Investor Preferred Units) issuable hereunder, when issued in accordance
     with the provisions of this Agreement and the Investor Agreement, will be
     duly and validly authorized and issued and will be fully paid and non-
     assessable.  Neither Public Company, Investor nor any person acting on
     their behalf has taken or will take any action which would subject the
     issuance of the Investor Preferred Units to the ECIP Partners to the
     registration requirements of Section 5 of the Securities Act.

               (G) Except as provided in Schedule 6.3(g), Public Company has no
                                         ---------------                       
     obligation (contingent or other) to purchase, redeem or otherwise acquire
     any of its Shares or any interest therein or to pay any dividend or make
     any other distribution in respect thereof (except for any distribution that
     was declared prior to the date hereof and not paid on or before the date
     hereof).  Public Company has authorized and reserved for issuance a
     sufficient number of Shares to satisfy its obligations under this Agreement
     and the Investor's Investor Agreement.

                                      -18-

 
               (H) Public Company has duly and timely filed with the appropriate
     governmental authorities all Tax Returns required to be filed by it for all
     periods ending on or prior to the Closing Date, except to the extent of any
     Tax Return for which an extension of time for filing has been properly
     filed.  Each such Tax Return is true and correct in all material respects.
     All Taxes owed by Public Company have been paid (whether or not shown on a
     Tax Return).  All Taxes which Public Company is required by law to withhold
     or collect, including, without limitation, Taxes required to have been
     withheld in connection with amounts paid or owing to any employee,
     independent contractor, creditor, partner, or other third party and sales,
     gross receipts and use taxes, have been duly withheld or collected and, to
     the extent required, have been paid over to the proper governmental
     authorities or are held in separate bank accounts for such purpose.  There
     are no liens for Taxes upon the assets of Public Company except for
     statutory liens for Taxes not yet due.

               (I) Public Company has not filed for an extension of a statute of
     limitations with respect to any Taxes and no governmental authorities have
     requested an extension of the statute of limitations with respect to any
     Taxes.  Public Company is not a party to any pending action or any formal
     or informal proceeding by any taxing authority for a deficiency, assessment
     or collection of Taxes, and no claim of any deficiency, assessment or
     collection of Taxes has been asserted or, to the knowledge of Public
     Company, threatened against it, including claims by any taxing authority in
     a jurisdiction where Public Company does not file Tax Returns that it is or
     may be subject to taxation in that jurisdiction.

               (J) Public Company is organized and has operated from its
     commencement through the date hereof in such a manner so as to qualify for
     taxation as a real estate investment trust under the Code, and Public
     Company intends to operate in such a manner so as to qualify and to
     continue to so qualify as a real estate investment trust.

               (K) Public Company does not hold "plan assets" within the meaning
     of 29 C.F.R. Section 2510.3-101.

     SECTION 6.4  DUE ORGANIZATION, ETC. OF PUBLIC COMPANY.
                  ---------------------------------------- 

     (a) Public Company is a corporation duly organized, validly existing and in
good standing under the laws of the State of Delaware, is (or prior to the
Closing will be) duly qualified and in good standing as a foreign corporation
under the laws of the State of California, and has all necessary power,
corporate and otherwise, to execute and deliver this Agreement and all other
documents and instruments to be executed and delivered by Public Company in
connection herewith and to perform all its obligations hereunder and thereunder.
This Agreement has been duly authorized by all requisite corporate action on the
part of Public Company.  The execution and delivery of this Agreement and the
other documents and 

                                      -19-

 
instruments to be executed and delivered by Public Company in connection with
the transactions described herein, and the consummation of the transactions
contemplated hereby and thereby, do not require the consent or approval of the
shareholders of Public Company or, to the knowledge of Public Company, the
consent or approval of any governmental authority, nor, to the knowledge of
Public Company, does the execution and delivery of this Agreement violate, in
any way material to the transactions contemplated hereby, any contract or
agreement to which Public Company is a party or any governmental or judicial
order, judgment, decree, statute, law, rule or regulation applicable to Public
Company, and this Agreement and all documents and other instruments to be
executed and delivered by Public Company in connection herewith constitute the
legal, valid and binding obligations of Public Company.

     (b) Public Company is not a party to, or bound by, any unexpired,
undischarged or unsatisfied contract, agreement, indenture, mortgage, debenture,
note or other instrument under the terms of which performance by Public Company
according to the terms of this Agreement will be a default or an event of
acceleration, or grounds for termination, or whereby timely performance by
Public Company, according to the terms of this Agreement, may be prohibited,
prevented or delayed.

                                  ARTICLE VII

                   REPRESENTATIONS AND WARRANTIES OF INVESTOR
                   ------------------------------------------

     SECTION 7.1  GENERAL STATEMENT.  Investor hereby makes the representations
                  -----------------                                            
and warranties to ECIP and each ECIP Partner which are set forth in this Article
                                                                         -------
VII.  All representations and warranties set forth in Section 7.4 shall survive
- ---                                                   -----------              
the Closing (and none shall merge into any instrument of conveyance) for the
period of any relevant statute of limitations therefor.  Representations and
warranties of Investor are made as of the date of this Agreement.

     SECTION 7.2  ATTRIBUTION.  For purposes of the representations and
                  -----------                                          
warranties of Public Company set forth in this Article VII only, the words
"knowledge of Investor" or "Investor's knowledge" shall mean the actual and not
constructive knowledge of Mortimer Zuckerman, Edward Linde and Thomas O'Connor
(collectively, the "INVESTOR KNOWLEDGE PARTIES").  Any fact, matter or other
statement shall not be deemed to be within the knowledge of Investor or
Investor's knowledge unless the Investor Knowledge Parties, or any of them, have
actual knowledge of such fact, matter or other statement.  Notwithstanding the
foregoing, the representations and warranties made by Investor under Section 7.4
                                                                     -----------
below are intended to be absolute in nature and are not limited by the knowledge
or attribution limitations of this Section 7.2.
                                   ----------- 

     SECTION 7.3  REPRESENTATIONS AND WARRANTIES RE: INVESTOR BUSINESS AND
                  --------------------------------------------------------
OPERATIONS.  Investor hereby represents and warrants as follows:
- ----------                                                      

               (A) Investor is organized and, to Investor's knowledge, has
     conducted its business in accordance with all applicable laws, to the
     extent applicable, the failure or the violation of which would reasonably
     be expected to have a material adverse effect on the results of operations
     of Investor.

                                      -20-

 
               (B) There are no actions, suits or proceedings pending and, to
     Investor's knowledge, no such proceedings are threatened or contemplated by
     governmental authorities or by others, which would reasonably be expected
     to either (i) question the validity of this Agreement or the consummation
     of the transactions contemplated hereby or the issuance of the Investor
     Preferred Units contemplated hereby, any other agreements contemplated
     hereby or any actions taken pursuant to any of the foregoing or (ii) result
     in any material adverse change in the condition, financial or otherwise, or
     in the earnings, business affairs, management or business prospects of
     Investor.  As of the date hereof, there is no material action or suit
     against Investor pending or threatened by any Person.

               (C) No proceeding or other action has been commenced or
     undertaken relating to the dissolution or merger of Investor (except in
     connection with an acquisition of property for Units in which Investor is
     the surviving party in the merger) and none is presently contemplated.

               (D) Investor has duly and timely filed with the appropriate
     governmental authorities all Tax Returns required to be filed by it for all
     periods ending on or prior to the Closing Date, except to the extent of any
     Tax Return for which an extension of time for filing has been properly
     filed.  Each such Tax Return is true and correct in all material respects.
     All Taxes owed by Investor have been paid (whether or not shown on a Tax
     Return).  All Taxes which Investor is required by law to withhold or
     collect, including, without limitation, Taxes required to have been
     withheld in connection with amounts paid or owing to any employee,
     independent contractor, creditor, partner, or other third party and sales,
     gross receipts and use taxes, have been duly withheld or collected and, to
     the extent required, have been paid over to the proper governmental
     authorities or are held in separate bank accounts for such purpose.  There
     are no liens for Taxes upon the assets of Investor except for statutory
     liens for Taxes not yet due.

               (E) Investor has not filed for an extension of a statute of
     limitations with respect to any Taxes and no governmental authorities have
     requested an extension of the statute of limitations with respect to any
     Taxes.  Investor is not a party to any pending action or any formal or
     informal proceeding by any taxing authority for a deficiency, assessment or
     collection of Taxes, and no claim of any deficiency, assessment or
     collection of Taxes has been asserted or, to the knowledge of Investor,
     threatened against it, including claims by any taxing authority in a
     jurisdiction where Investor does not file Tax Returns that it is or may be
     subject to taxation in that jurisdiction.

               (F) Investor is not, and will not become, a "publicly traded
     partnership" within the meaning of Section 7704 of the Code.

               (G) Investor does not hold "plan assets" within the meaning of 29
     C.F.R. Section 2510.3-101.

     SECTION 7.4  DUE FORMATION, ETC. OF INVESTOR.  Investor is a limited
                  -------------------------------                        
partnership duly formed and in good standing under the laws of the State of
Delaware, is (or prior to the Closing 

                                      -21-

 
will be) duly qualified and in good standing as a foreign limited partnership
under the laws of the State of California, and has all necessary power,
partnership and otherwise, to execute and deliver this Agreement and all other
documents and instruments to be executed and delivered by Investor in connection
herewith and to perform all its obligations hereunder and thereunder. This
Agreement has been duly authorized by all requisite partnership action on the
part of Investor. The execution and delivery of this Agreement and the other
documents and instruments to be executed and delivered by Investor in connection
with the transactions described herein, and the consummation of the transactions
contemplated hereby and thereby, do not require the consent or approval of the
partners of Investor or, to the knowledge of Investor, the consent or approval
of any governmental authority, nor, to the knowledge of Investor, does the
execution and delivery of this Agreement violate, in any way material to the
transactions contemplated hereby, any contract or agreement to which Investor is
a party or any governmental or judicial order, judgment, decree, statute, law,
rule or regulation applicable to Investor, and this Agreement and all documents
and other instruments to be executed and delivered by Investor in connection
herewith constitute the legal, valid and binding obligations of Investor.
Investor is not a party to, or bound by, any unexpired, undischarged or
unsatisfied contract, agreement, indenture, mortgage, debenture, note or other
instrument under the terms of which performance by Investor according to the
terms of this Agreement will be a default or an event of acceleration, or
grounds for termination, or whereby timely performance by Investor, according to
the terms of this Agreement, may be prohibited, prevented or delayed.

                                  ARTICLE VIII

                                  LIMITATIONS
                                  -----------

     SECTION 8.1  LIMITATIONS.  Except for the representations and warranties
                  -----------                                                
set forth in Section 4.3 above and Sections 6.3 and 7.3 (which shall survive the
             -----------           ------------     ---                         
Closing until a date (the "LIMITATION DATE") which is twelve (12) months after
the Closing Date) all representations and warranties shall survive the Closing
without any time limit other than those limits imposed by the applicable statute
of limitations or other similar laws.  The contractual limitation on the ECIP
Partners rights set forth in the preceding sentence shall not constitute a
waiver or release by the ECIP Partners of their rights under Federal Securities
Laws.  Notwithstanding the foregoing, Investor and/or Public Company shall have
the right to commence or prosecute against the ECIP Partners any claim for the
breach of a representation or warranty under Section 4.3 relating to events or
                                             -----------                      
occurrences which occurred prior to the Limitation Date, provided such claim is
actually filed no later than forty-five (45) days after the Limitation Date, and
otherwise no action based thereon shall be commenced after the Closing Date.
The representations and warranties of the parties made in this Agreement are
personal to the other parties hereto and no Person other than a named party
hereto shall be entitled to bring any action based thereon.  The representations
and warranties set forth above are further subject to the limitations of
liability set forth in Section 11.1 hereof and Article 12 of the Transaction
                       ------------                                         
Agreement, which limitations are in addition to (and not in lieu of) the
limitations set forth in this Agreement.

                                      -22-

 
                                   ARTICLE IX

                                   COVENANTS

     SECTION 9.1  CONFIDENTIALITY.
                  --------------- 

               (A) As used herein, "CONFIDENTIAL MATERIAL" means, with respect
     to any party hereto (the "PROVIDING PARTY"), all information, whether oral,
     written or otherwise, furnished to another party hereto (the "RECEIVING
     PARTY") or the Receiving Party's directors, officers, partners, Affiliates,
     employees or agents, or their respective representatives (collectively,
     "REPRESENTATIVES"), by the Providing Party and all reports, analyses,
     compilations, studies and other material prepared by the Receiving Party or
     its Representatives (in whatever form maintained, whether documentary,
     computer storage or otherwise) containing, reflecting or based upon, in
     whole or in part, any such information.  The term "CONFIDENTIAL MATERIAL"
     does not include information which (i) is or becomes generally available to
     the public other than as a result of a disclosure by the Receiving Party,
     its Representatives or anyone to whom the Receiving Party or any of its
     Representatives transmit any Confidential Material in violation of this
     Agreement or (ii) is or becomes known or available to the Receiving Party
     on a nonconfidential basis from a source (other than the Providing Party or
     one of its Representatives) who is not, to the knowledge of the Receiving
     Party, prohibited from transmitting the information to the Receiving Party
     or its Representatives by a contractual, legal, fiduciary or other
     obligation.

               (B) Subject to paragraph (c) below or except as required by
                              -------------                               
     applicable laws regulations or legal process as reasonably interpreted by
     Public Company, the Confidential Material will be kept confidential and
     will not, without the prior written consent of the Providing Party, be
     disclosed by the Receiving Party or its Representatives, in whole or in
     part, and will not be used by the Receiving Party or its Representatives,
     directly or indirectly, for any purpose other than in connection with this
     Agreement, the other Transaction Documents and the transactions
     contemplated hereby or thereby or evaluating, negotiating or advising with
     respect to such matters.  Notwithstanding anything to the contrary herein,
     the Receiving Party has the right to transmit Confidential Material to its
     Representatives only if and to the extent that such Representatives need to
     know the Confidential Material for purposes of such transactions and are
     informed by the Receiving Party of the confidential nature of the
     Confidential Material and of the terms of this Section 9.1(b).
                                                    --------------  
     Notwithstanding the foregoing, each of Public Company, Investor, ECIP and
     the ECIP Partners, shall have the right to disclose such Confidential
     Material to its actual or proposed financing and capital sources and their
     respective representatives, provided that, prior to disclosing such
     information to such Persons, as the case may be, it advises such Persons of
     the confidential nature of such Confidential Information and causes to be
     affixed to such Confidential Information and requires that such Information
     be used only for the purposes specified by the parties hereto in connection
     with the transaction contemplated by this Agreement and/or the Transaction
     Agreement.  In any event, the Receiving Party will be responsible for any
     actions by its Representatives (and any other Person to whom such
     Confidential Material is conveyed in accordance with the provisions hereof)
     which are not in accordance with the provisions hereof.

                                      -23-

 
               (C) In the event that the Receiving Party, its Representatives or
     anyone to whom the Receiving Party or its Representatives supply the
     Confidential Material are requested (by oral questions, interrogatories,
     requests for information or documents, subpoena, civil or criminal
     investigative demand, any informal or formal investigation by any
     government or governmental agency or authority or otherwise in connection
     with legal process) to disclose any Confidential Material, the Receiving
     Party agrees (i) to immediately notify the Providing Party of the
     existence, terms and circumstances surrounding such a request, (ii) to
     consult with the Providing Party on the advisability of taking legally
     available steps to resist or narrow such request, and (iii) if disclosure
     of such information is required, to furnish only that portion of the
     Confidential Material which, in the opinion of the Receiving Party's
     counsel, the Receiving Party is legally compelled to disclose and to
     cooperate with any action by the Providing Party to obtain an appropriate
     protective order or other reliable assurance that confidential treatment
     will be accorded the Confidential Material (it being agreed that the
     Providing Party shall reimburse the Receiving Party for all reasonable out-
     of-pocket expenses incurred by the Receiving Party in connection with such
     cooperation).

               (D) In the event of the termination of this Agreement in
     accordance with its terms, promptly upon request from the Providing Party,
     the Receiving Party shall, except to the extent prohibited by applicable
     laws, regulations or legal process, redeliver to the Providing Party or
     destroy all tangible Confidential Material and will not retain any copies,
     extracts or other reproductions thereof in whole or in part.  Any such
     destruction shall be certified in writing to the Providing Party by an
     authorized officer of the Receiving Party supervising the same.

     SECTION 9.2  PUBLIC STATEMENTS.  Investor, Public Company, and Rockmark
                  -----------------                                         
Corporation shall consult with each other prior to issuing any press release or
any written public statement with respect to this Agreement or the transactions
contemplated hereby and, except as shall be required by applicable law or the
applicable rules of the New York Stock Exchange, none of the parties hereto
shall issue any such press release or written public statement prior to review
and approval by Investor, Public Company and Rockmark Corporation, it being
understood that such approval will not be unreasonably withheld or delayed.

     SECTION 9.3  SURVIVAL.  The covenants in this Article IX shall survive the
                  --------                         ----------                  
Closing.

                                      -24-

 
                                   ARTICLE X

                                    CLOSING
                                    -------

     SECTION 10.1  CLOSING DELIVERIES.
                   ------------------ 

     (A) Closing.  As used herein, the term "CLOSING" shall mean the
         -------                                                    
consummation of all transactions contemplated in this Agreement as provided in
                                                                              
subparagraphs (b) and (c) below, and the term "CLOSING DATE" shall mean the date
- -----------------     ---                                                       
upon which the Closing occurs.

     (B) Closing Deliveries of the ECIP Partners.  On the date hereof, the ECIP
         ---------------------------------------                               
Partners are delivering to Investor and Public Company, or have caused to be
delivered to the Escrow Agent, the following:

               (i) Evidence of the organization, existence and authority of ECIP
     to enter into this Agreement and to consummate the transactions
     contemplated hereby and thereby (together with an incumbency and signature
     certificate regarding the officer(s) signing on Rockmark Corporation's
     behalf);

               (ii) An executed Tax Reporting Agreement substantially in the
     form attached hereto as Exhibit E;
                             --------- 

               (iii)  A Foreign Investment in Real Property Tax Act affidavit
     executed by each ECIP Partner (it being understood that if any ECIP Partner
     shall fail to provide the necessary affidavit and/or documentation, Public
     Company may proceed with withholding provision as provided by law);

               (iv) Assignments to Investor of each ECIP Partner's interest in
     ECIP in the form annexed hereto as Exhibit F executed by each such ECIP
                                        ---------                           
     Partner;

               (v) Evidence of the organization (if other than an individual),
     existence (if other than an individual) and authority of each ECIP Partner
     to enter into this Agreement and to consummate the transactions
     contemplated hereby, certified by an appropriate officer or partners (if
     other than an individual) (together with an incumbency and signature
     certificate regarding the Person signing);

               (vi) The Investor Agreement executed by each ECIP Partner;

               (vii)  The Registration Rights Agreement executed by each ECIP
     Partner;

               (viii)  Additional documents, to the extent consistent with the
     provisions of this Agreement, that Investor, Public Company or the Title
     Company may reasonably request for the consummation of the transactions
     contemplated by this Agreement.

               (ix) a Representation Letter in the form attached hereto as
     Schedule 10.1(b)(ix) executed by each ECIP Partner (of his or her duly
     authorized attorney-in-fact 

                                      -25-

 
     as evidenced by a copy of the relevant power of attorney attached thereto)
     indicating thereon that such ECIP Partner is an "accredited investor."

     (C) Closing Deliveries of Investor and/or Public Company.  On the date
         ----------------------------------------------------              
hereof, Investor and/or Public Company are delivering to the ECIP Partners, or
have caused to be delivered to the Escrow Agent, the following:

               (i) Evidence of the organization, existence and authority of
     Public Company and Investor to enter into this Agreement and to consummate
     the transactions contemplated hereby, certified by an appropriate officer
     of Public Company or Investor, as appropriate (together with an incumbency
     and signature certificate regarding the officer(s) signing on their
     behalf);

               (ii) The Registration Rights Agreement executed by Public
     Company;

               (iii)  The Investor Agreement executed by Public Company and any
     other partner whose execution is required by Investor's Investor Agreement,
     reflecting the issuance to the ECIP Partners of the Investor Preferred
     Units in accordance with Section 2.1;
                              ----------- 

               (iv) An executed Tax Reporting Agreement substantially in the
     form attached hereto as Exhibit E; and
                             ---------     

               (v) Public Company and Investor shall deliver any additional
     documents, to the extent consistent with the provisions of this Agreement,
     that the other parties or the Title Company may reasonably request for the
     consummation of the transactions contemplated by this Agreement.

               (vi) Public Company shall deliver evidence reasonably
     satisfactory to Rockmark Corporation that Richard E. Salomon has been duly
     elected or appointed as a member of Public Company's Board of Directors.

               (vii)  A certificate dated as of the date hereof (in the form
     attached hereto as Exhibit I) signed by the Secretary of the Public Company
     certifying that certain resolutions relating to the exclusion of Investor
     Preferred Units from the "Ownership Limit" set forth in the Public
     Company's charter were duly adopted by the Board of Directors of the Public
     Company prior to the date hereof.

     (D) Waiver of Failure of Conditions Precedent.  By closing the transactions
         -----------------------------------------                              
contemplated by this Agreement, each party hereto shall be conclusively deemed
to have waived the benefit of any remaining unfulfilled conditions precedent set
forth in this Agreement and the Transaction Agreement.

     SECTION 10.2  ECIP CONTRIBUTION VALUE; ALLOCATIONS.  Investor, Public
                   ------------------------------------                   
Company and the ECIP Partners each hereby agree that the aggregate value (the
"ECIP CONTRIBUTION VALUE") to be paid by Investor for the Property shall equal
the aggregate of the One EC Value, Two EC Value, 

                                      -26-

 
Three EC Value and Four EC Value set forth hereinbelow, subject to adjustment
pursuant to Section 10.3 below and Exhibit V of the Transaction Agreement. The
            ------------
One EC Value, Two EC Value, Three EC Value and Four EC Value shall be determined
as follows:

               .  "ONE EC VALUE" shall equal (i) an amount equal to $242.685
          million (Gross Market Value of One EC), minus the One EC Existing Debt
          Balance, multiplied by (ii) 49.983044% (ECIP's percentage interest in
                   ---------- --                                               
          One ECV after the redemption of the interest of Fedmark Corporation in
          ECIP);

               .  "TWO EC VALUE" shall equal (i) an amount equal to $244.022
          million (Gross Market Value of Two EC), minus the Two EC Existing Debt
          Balance, multiplied by (ii) 40% (ECIP's percentage interest in Two
                   ---------- --                                            
          ECV);

               .  "THREE EC VALUE" shall equal (i) an amount equal to  $226.239
          million (Gross Market Value of Three EC), minus the Three EC Existing
          Debt Balance, multiplied by (ii) 49.974737% (ECIP's percentage
                        ---------- --                                   
          interest in Three ECV after the redemption of the interest of Fedmark
          Corporation in ECIP); and

               .  "FOUR EC VALUE" shall equal (i) an amount equal to $321.057
          million (Gross Market Value of Four EC), minus the Four EC Existing
          Debt Balance, multiplied by (ii) 49.979742% (ECIP's percentage
                        ---------- --                                   
          interest in Four ECV after the redemption of the interest of Fedmark
          Corporation in ECIP).

     SECTION 10.3  APPORTIONMENT CREDIT.  The ECIP Contribution Value shall be
                   --------------------                                       
adjusted to reflect the prorations and other adjustments pursuant to and as
provided in Exhibit V of the Transaction Agreement.

     SECTION 10.4  DELAYED ADJUSTMENT.  Investor and Rockmark Corporation,
                   ------------------                                     
acting on behalf of the ECIP Partners, shall administer the provisions of
Exhibit V of the Transaction Agreement following the Closing based on the
closing of the ECIP books for the month in which the Closing Date occurs. If, as
a result of the Final Audit to be conducted pursuant to Exhibit V, the amount of
an item listed in Exhibit V of the Transaction Agreement shall prove to be
incorrect (whether as a result of an error in calculation or a lack of complete
and accurate information as of the Closing), Investor and the ECIP Partners
shall adjust the Investor Preferred Units initially issued (proportionately to
the Investor Preferred Units initially issued) by Investor delivering an amended
schedule to the Investor Agreement as reasonably agreed to by Rockmark
Corporation reflecting the corrected number of Investor Preferred Units issued
to each ECIP Partner in order to correct such error upon receipt of reasonable
proof of such error, provided that such proof is delivered to the party from
whom payment is requested as provided in Exhibit V. The correction of any such
error shall be made effective as of  the Closing Date and shall include the
further payment by Investor, or repayment by the ECIP Partners, of any
distributions made by Investor in respect of the increase, or decrease, of the
number of Investor Preferred Units initially held by any ECIP Partner prior to
such adjustment.

                                      -27-

 
     SECTION 10.5  SURVIVABILITY.  The provisions of this Article 10 shall
                   -------------                          ----------      
survive the Closing and not be merged therein for a period of six months after
the closing or such longer period as may be necessary to complete to Final Audit
and make the adjustment described in Section 10.4.
                                     -------------

     Section 10.6  CLOSING COSTS.  The parties shall bear certain closing costs
                   -------------                                               
of the transaction contemplated hereby as set forth in Section 10.3 and 
                                                       ------------ 
Exhibit V of the Transaction Agreement. Any other Closing costs not covered
- ---------
herein or in Section 10.3 of the Transaction Agreement or Exhibit V of the
             ------------                                 ---------           
Transaction Agreement shall be allocated between the parties in accordance with
the local practice and custom in San Francisco, California.

                                   ARTICLE XI

                       BREACH, DEFAULT, LIABILITY LIMITS
                       ---------------------------------

     11.1  RIGHTS OF INVESTOR AND PUBLIC COMPANY.
           ------------------------------------- 

               (A) In the event of any claim, suit or other action against any
     of the ECIP Partners pertaining to (a) this Agreement, any of the documents
     executed in connection herewith or any of the transactions contemplated
     hereby or thereby (including, without limitation, any and all
     indemnification obligations of any of  the  ECIP Partners hereunder or
     thereunder) or (b) a breach by  any of the ECIP Partners of any of the
     terms or provisions of this Agreement or of any of the documents executed
     by the ECIP Partners in connection  with  the matters contemplated in this
     Agreement (including, without limitation, the breach of any representation
     or warranty of the ECIP Partners set forth herein or therein), Investor's
     and Public Company's sole remedy shall be an action for monetary damages;
                                                                              
     provided that, except for the breach of the representations and warranties
     -------- ----                                                             
     set forth in Sections 4.3(a), (b), (c), and (d) , Section 4.5, Section 5.3
                  ----------------------------------   -----------  -----------
     and Section 5.4 above (which, in so far as they relate solely to ECIP or
     ---------------                                                         
     the Property, will not be subject to any limitation on the amount of such
     liability, but in so far as they relate directly or indirectly to any
     EC/ECA Venture or any of the EC/ECA Buildings such representations and
     warranties shall be subject to the limitations on the amount of liability
     of this Section 11.1 (a) and Section 12.1.2 of the Transaction Agreement),
     and notwithstanding any provision to the contrary contained in this
     Agreement, the Transaction Agreement or in any other documents executed in
     connection herewith or therewith, (i) the maximum aggregate liability of
     the ECIP Partners, and the maximum aggregate amount which may be awarded to
     and collected by Investor and Public Company or any other Person, with
     respect to any claim, suit or other action relating to a breach of a
     representation, covenant or indemnity of this Agreement, the Transaction
     Agreement or any other documents executed in connection herewith or
     therewith shall not exceed an amount equal to five percent (5%) of the ECIP
     Contribution Value, and the liability of any ECIP Partner shall not exceed
     an amount equal to (x) the ECIP Partner's percentage interest in ECIP
     immediately prior to the Closing, multiplied by (y) five percent (5%) of
                                       ---------- --                         
     the ECIP Contribution Value, and (ii) the maximum aggregate amount which
     may be awarded to and collected by Investor and Public Company with respect
     to any claim, suit or other action against any ECIP Partner relating to any
     of ECIP, One EC, 

                                      -28-

 
     Two EC, Three EC or Four EC or their respective buildings shall not exceed
     an amount (each a "BUILDING MAXIMUM LIABILITY AMOUNT") equal to five
     percent (5%) of the One EC Value, Two EC Value, Three EC Value or Four EC
     Value, as the case may be, and with respect to any claim, suit or action
     relating to any such Building, the liability of any ECIP Partner shall not
     exceed an amount equal to (x) the ECIP Partner's percentage interest in
     ECIP immediately prior to the Closing, multiplied by (y) the Building
                                            ---------- --
     Maximum Liability Amount for such breach. Notwithstanding the foregoing,
     the terms and provisions of this Section 11.1(a) are further subject to the
                                      ---------------            
     overall $43,000,000 limitation of liability set forth in
     
     Section 12.1.2 of the Transaction Agreement, it being acknowledged and
     --------------                                                        
     agreed that the maximum liability caps described hereinabove may be further
     reduced as a result of recoveries made by Investor, Public Company or their
     Affiliates in connection with the other transactions described in the
     Transaction Agreement in accordance with said Section 12.1.2 of the
                                                   --------------       
     Transaction Agreement.  Notwithstanding the foregoing, the parties hereto
     hereby acknowledge and agree that the foregoing limitations on the amount
     of  liability (and any other cap on the liability of the Ventures or the
     Transferor Parties set forth in any other Transaction Document) does not
     apply to the breach of any of the representations and warranties set forth
     in Section 4.3 (a), (b), (c) or (d), Section 4.5, Section 5.3 and 
        ---------------------------------------------- ---------------
     Section 5.4 hereof (in so far as they relate solely to ECIP or the Property
     -----------
     and any amounts received with respect thereto shall not have the affect of
     reducing the maximum amount recoverable for other breaches which are
     subject to the limitations on the amount of liability under Section 11.1(a)
                                                                 ---------------
     hereof or Section 12.1.2 of the Transaction Agreement, but in so far as
               --------------
     they relate directly or indirectly to any EC/ECA Venture or any of the
     EC/ECA Buildings such representations and warranties shall be subject to
     the limitations on the amount of liability of this Section 11.1 (a) and
     Section 12.1.2 of the Transaction Agreement) and that any monetary damages
     recoverable from an ECIP Partner shall be recovered only from the
     particular ECIP Partner solely responsible therefor in the case of a breach
     of a representation in Section 5.3 or 5.4 or from the ECIP Partners
                            ------------------
     severally, and not jointly, in the case of a breach of a representation in
     Section 4.3 (a), (b), (c), or (d) in the ratio of each such partner's
     percentage interest in and to ECIP immediately prior to the Closing .The
     terms and provisions of this Section 11.1 shall survive the Closing and
                                  ------------
     shall not be merged therein.

               (B) Except as provided in the last sentence of paragraph (b),
     Investor's and Public Company's sole recourse against  the ECIP Partners,
     individually and/or as a group, for liability assumed by, and for any
     indemnity of or breach of representation or warranty made by any of the
     ECIP Partners shall be limited to the recovery by Investor and/or Public
     Company of Investor Preferred Units (and any Securities received in
     exchange therefor or upon conversion thereof) issued to such ECIP Partner
     (severally in the ratio of each such ECIP Partner's proportionate
     partnership interest in ECIP on the Closing to the extent provided in
                                                                          
     paragraph (a) above), and none of the ECIP Partners shall have any personal
     -------------                                                              
     liability to pay any damages or other amounts in cash in respect thereof,
     except to the extent that any ECIP Partner holds an insufficient amount of
     Investor Preferred Units and Securities to satisfy the claim or judgment,
     in which event such Person shall be obligated to pay any damages or other
     amounts not satisfied by the 

                                      -29-

 
     transfer of Investor Preferred Units or Securities in cash. The number of
     Investor Preferred Units or Shares recoverable from an ECIP Partner in
     respect of any claim (or damages) to be satisfied by such Person as
     provided in this Agreement shall be determined on a full diluted basis as
     if converted by reference to the closing trading price of the Public
     Company's common shares on the date of payment of the damages or other
     amounts Notwithstanding Section 11.1(a) and the foregoing provisions of
     this paragraph (b), each ECIP Partner shall be singly, and not jointly,
     liable without limitation by recourse to his or its units or otherwise for
     a breach of his or its representation in Sections 5.3 or 5.4
                                              -------------------
               (C) Investor shall promptly give Rockmark Corporation, as
     representative of the ECIP Partners,  notice of any claim made by any
     third party which would reasonably be expected to result in liability of
     the ECIP Partners in respect of a breach of a representation made by them
     in this Agreement or otherwise and shall give the ECIP Partners, acting
     through Rockmark Corporation as their attorney in fact, the opportunity to
     cure any alleged claim and to defend against and settle all such claims at
     their sole cost.  The failure to give such notice, however, shall not
     relieve an ECIP Partner of any liabilities hereunder to the extent that it
     is not materially prejudiced as a result thereof.

     11.2  RIGHTS OF ECIP AND ECIP PARTNERS.  In the event of a breach by
           --------------------------------                              
Investor or Public Company of any of the terms or provisions of this Agreement
or any of the documents executed in connection herewith, ECIP and the ECIP
Partners shall be entitled to pursue any and all rights and remedies at law or
in equity available to ECIP and such ECIP Partners with respect to such breach;
provided that, except for breaches of the representations and warranties set
forth in Sections 6.3, 6.4, 7.3 and 7.4 (which will not be subject to any
         ---------------------      ---                                  
liability cap), and except as otherwise expressly provided in any other
Transaction Document, the maximum aggregate liability of Investor and Public
Company for any and all breaches of the representations and warranties of
Investor and/or Public Company contained in any Transaction Document shall not
exceed an amount equal to Forth-Three Million Dollars ($43,000,000) in the
aggregate.  The foregoing contractual limitation shall not constitute a waiver
or release by the ECIP Partners of their rights under Federal Securities Laws.
The terms and provisions of this Section 11.2 shall survive the Closing and
                                 ------------                              
shall not be merged therein.

                                  ARTICLE XII

                                 MISCELLANEOUS
                                 -------------

     SECTION 12.1  EXPENSES.  Except as expressly set forth herein or in the
                   --------                                                 
Transaction Agreement, each party hereto shall bear its own costs and expenses
with respect to the transactions contemplated hereby.

     SECTION 12.2  AMENDMENT.  This Agreement may be amended, modified or
                   ---------                                             
supplemented but only in writing signed by each of the parties hereto.

                                      -30-

 
     SECTION 12.3.  NOTICES.  Any notice, request, instruction or other document
                    -------                                                     
to be given hereunder by a party hereto shall be in writing and shall be deemed
to have been given, (a) when received if given in person or by courier or a
courier service, (b) on the date of transmission if sent by telex, facsimile or
other wire transmission or (c) three Business Days after being deposited in the
U.S. mail, certified or registered mail, postage prepaid:

               (A) If to Public Company or Investor, addressed as follows:

          Boston Properties, Inc.
          8 Arlington Street
          Boston, Massachusetts 02116-3495

          Attention:  General Counsel
          Facsimile:  617-421-1555
          Telephone:  617-859-2600

          with a copy to

          Goulston & Storrs, P.C.
          400 Atlantic Avenue
          Boston, Massachusetts 02110-3333

          Attention:  Eli Rubenstein, Esq.
          Facsimile:  617-574-4112
          Telephone:  617-482-1776

     (B) If to ECIP or the ECIP Partners, addressed as follows:

          Rockmark Corporation
          30 Rockefeller Plaza, Room 5600
          New York, New York 10112

          Attention:  Richard E. Salomon
          Facsimile:  (212) 424-1806
          Telephone (212) 903-1204

          with a copy to:

          Willkie Farr & Gallagher
          787 Seventh Avenue
          New York, New York 10019-6099

  Attention:  Bruce M. Montgomerie
  Facsimile:  (212) 728-8111
  Telephone (212) 728-8248

                                      -31-

 
or to such other individual or address as a party hereto may designate for
itself by notice given as herein provided.

     SECTION 12.4  WAIVERS.  The failure of a party hereto at any time or times
                   -------                                                     
to require performance of any provision hereof shall in no manner affect its
right at a later time to enforce the same.  No waiver by a party of any
condition or of any breach of any term, covenant, representation or warranty
contained in this Agreement shall be effective unless in writing, and no waiver
in any one or more instances shall be deemed to be a further or continuing
waiver of any such condition or breach in other instances or a waiver of any
other condition or breach of any other term, covenant, representation or
warranty.

     SECTION 12.5  COUNTERPARTS.  This Agreement may be executed in
                   ------------                                    
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

     SECTION 12.6  INTERPRETATION.  The headings preceding the text of Articles
                   --------------                                              
and Sections included in this Agreement and the headings to Exhibits and
Schedules attached to this Agreement are for convenience only and shall not be
deemed part of this Agreement or be given any effect in interpreting this
Agreement. The use of the masculine, feminine or neuter gender herein shall not
limit any provision of this Agreement. The use of the term  "including" or
"include" shall in all cases herein mean "including, without limitation" or
"include, without limitation," respectively.  Underscored references to
Articles, Sections, Subsections, Exhibits or Schedules shall refer to those
portions of this Agreement.

     SECTION 12.7  GOVERNING LAW.  THIS AGREEMENT SHALL BE  GOVERNED BY AND
                   -------------                                           
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF CALIFORNIA.

     SECTION 12.8  ASSIGNMENT.  This Agreement shall be binding upon and inure
                   ----------                                                 
to the benefit of the parties hereto and their respective successors and
assigns. No assignment of any rights or obligations shall be made by any party
without the written consent of each other party.

     SECTION 12.9  NO THIRD PARTY BENEFICIARIES.  This Agreement is solely for
                   ----------------------------                               
the benefit of the parties hereto and, to the extent provided herein, their
respective Representatives, and no provision of this Agreement shall be deemed
to confer upon other third parties any remedy, claim, liability, reimbursement,
cause of action or other right.

     SECTION 12.10 FURTHER ASSURANCES.  Upon reasonable request of any party,
                   ------------------                                        
each other party will execute and deliver such other documents, releases,
assignments and other instruments as may be required to effectuate completely
the transfer and assignment to Investor of the Property and to issue the
Investor Preferred Units and the Shares and to otherwise carry out the purposes
of this Agreement.

     SECTION 12.11 SEVERABILITY.  If any provision of this Agreement shall be
                   ------------                                              
held invalid, illegal or unenforceable, the validity, legality or enforceability
of the other provisions hereof 

                                      -32-

 
shall not be affected thereby, and there shall be deemed substituted for the
provision at issue a valid, legal and enforceable provision as similar as
possible to the provision at issue.

     SECTION 12.12 REMEDIES CUMULATIVE.  The remedies provided in this Agreement
                   -------------------                                          
shall be cumulative and shall not preclude the assertion or exercise of any
other rights or remedies available by law, in equity or otherwise.

     SECTION 12.13. ENTIRE UNDERSTANDING.  This Agreement, together with the
                    --------------------                                    
other Transaction Documents, sets forth the entire agreement and understanding
of the parties hereto with respect to the matters set forth herein and
supersedes any and all prior agreements, arrangements and understandings among
the parties.

     SECTION 12.14  CONSENT TO JURISDICTION AND SERVICE OF PROCESS.  ALL
                    ----------------------------------------------      
JUDICIAL PROCEEDINGS BROUGHT AGAINST ANY PERSON ARISING OUT OF OR RELATING TO
THIS AGREEMENT MAY BE BROUGHT IN ANY STATE OR FEDERAL COURT OF COMPETENT
JURISDICTION IN THE STATE OF CALIFORNIA, AND BY EXECUTION AND DELIVERY OF THIS
AGREEMENT EACH PARTY HERETO ACCEPTS FOR ITSELF, GENERALLY AND UNCONDITIONALLY,
THE NONEXCLUSIVE JURISDICTION OF THE AFORESAID COURTS AND WAIVES ANY DEFENSE OF
FORUM NON CONVENIENS AND IRREVOCABLY AGREES TO BE BOUND BY ANY JUDGMENT RENDERED
THEREBY IN CONNECTION WITH THIS AGREEMENT.  Each party hereby agrees that
service of all process in any such proceeding in any such court may be made by
registered or certified mail, return receipt requested, to any other party
hereto, at its address provided in this Agreement, such service being hereby
acknowledged by each party to be sufficient for personal jurisdiction in any
action against such party in any such court and to be otherwise effective and
binding service in every respect.  Nothing herein shall affect the right to
serve process in any other manner permitted by law.

     SECTION 12.15  WAIVER OF JURY TRIAL.  EACH OF THE PARTIES TO THIS AGREEMENT
                    --------------------                                        
HEREBY AGREES TO WAIVE ITS RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR
CAUSE OF ACTION BASED UPON OR ARISING OUT OF THIS AGREEMENT OR ANY DEALINGS
BETWEEN THEM RELATING TO THE SUBJECT MATTER OF THIS AGREEMENT.  The scope of
this waiver is intended to be all-encompassing of any and all disputes that may
be filed in any court and that relate to the subject matter of this transaction,
including, without limitation, contract claims, tort claims, breach of duty
claims and all other common law and statutory claims.  Each party hereto
acknowledges that this waiver is a material inducement to enter into a business
relationship, that each has already relied on this waiver in entering into this
Agreement, and that each shall continue to rely on this waiver in their related
future dealings.  Each party hereto further warrants and represents that it has
reviewed this waiver with its legal counsel and that it knowingly and
voluntarily waives its jury trial rights following consultation with such legal
counsel.  THIS WAIVER IS IRREVOCABLE, MEANING THAT IT MAY NOT BE MODIFIED EITHER
ORALLY OR IN WRITING, AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS,
RENEWALS, SUPPLEMENTS OR MODIFICATIONS TO THIS AGREEMENT.  In the event of
litigation, this Agreement may be filed as a written consent to a trial by the
court.

                                      -33-

 
  IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed and delivered as of the date first above written.

                              BOSTON PROPERTIES, INC.,
                              a Delaware corporation

                              By: /s/ Thomas J. O'Connor
                                 ----------------------------------------
                              Name: Thomas J. O'Connor
                              Title: Vice President

                              BOSTON PROPERTIES LIMITED PARTNERSHIP,
                              a Delaware limited partnership

                              By:  BOSTON PROPERTIES, INC.,
                              a Delaware corporation,
                              its general partner

                              By: /s/ Thomas J. O'Connor
                                 ----------------------------------------

                              By: /s/ William J. Wedge
                                 ----------------------------------------
                              Name: William J. Wedge
                              Title: Senior Vice President

                              EMBARCADERO CENTER INVESTORS PARTNERSHIP,
                              a California limited partnership

                              By:  ROCKMARK CORPORATION,
                                    its General Partner

                              By: /s/ Richard E. Salomon
                                 ----------------------------------------
                              Name:  Richard E. Salomon
                              Title:  President

                              Louis R. Benzak

                              By:  Rockmark Corporation, attorney-in-fact

                                  /s/ Richard E. Salomon
                              -------------------------------------------
                              Name:  Richard E. Salomon
                              Title:    President

                                      -34-

 
                              John R. H. Blum

                              By:  Rockmark Corporation, attorney-in-fact

                                  /s/ Richard E. Salomon
                              -------------------------------------------
                              Name:  Richard E. Salomon
                              Title:    President



                              JAMES R. BRONKEMA TRUST

                              By:  Rockmark Corporation, attorney-in-fact

                                  /s/ Richard E. Salomon
                              -------------------------------------------
                              Name:  Richard E. Salomon
                              Title:    President


                              Vincent deP. Farrell, Jr.

                              By:  Rockmark Corporation, attorney-in-fact

                                  /s/ Richard E. Salomon
                              -------------------------------------------
                              Name:  Richard E. Salomon
                              Title:    President


                              Leslie H. Larsen

                              By:  Rockmark Corporation, attorney-in-fact
 
                                  /s/ Richard E. Salomon
                              -------------------------------------------
                              Name:  Richard E. Salomon
                              Title:    President


                              Bruce M. Montgomerie

                              By:  Rockmark Corporation, attorney-in-fact

                                  /s/ Richard E. Salomon
                              -------------------------------------------
                              Name:  Richard E. Salomon
                              Title:    President

                                      -35-

 
                              Bill F. Osborne

                              By:  Rockmark Corporation, attorney-in-fact
 
                                  /s/ Richard E. Salomon
                              -------------------------------------------
                              Name:  Richard E. Salomon
                              Title:    President

                              EC HOLDINGS, INC.

                              By: /s/ [Signature Illegible]
                                 -------------------------------------------
                              Name:
                              Title:

                              PORTMAN FAMILY TRUST

                              By: /s/ John C. Portman III
                                 ----------------------------------------
                              Name: 
                              Title:

                              By: /s/ John C. Portman, Jr.
                                 ----------------------------------------
                              Name: 
                              Title:

                              By: /s/ Joan N. Portman
                                 ----------------------------------------
                              Name: 
                              Title:

                              William F. Pounds

                              By:  Rockmark Corporation, attorney-in-fact

                                  /s/ Richard E. Salomon
                              -------------------------------------------
                              Name:  Richard E. Salomon
                              Title:    President


                              David Rockefeller

                              By:  Rockmark Corporation, attorney-in-fact


                                  /s/ Richard E. Salomon
                              -------------------------------------------
                              Name:  Richard E. Salomon
                              Title:    President


                              DR & DESCENDANTS PARTNERSHIP

                              By:  Rockmark Corporation, attorney-in-fact

 
                                  /s/ Richard E. Salomon
                              -------------------------------------------
                              Name:  Richard E. Salomon
                              Title:    President

                                      -36-

 
                              ESTATE OF RICHARD B. SALOMON

                              By: /s/ Richard E. Salomon
                                 ----------------------------------------
                              Name:  Richard E. Salomon
                              Title:    Executor

                                  /s/ Richard E. Salomon
                              -------------------------------------------
                              Richard E. Salomon


                              SALOMON 1968 TRUST

                              By: /s/ Richard E. Salomon
                                 ----------------------------------------
                              Name:  Richard E. Salomon
                              Title:    Trustee


                              SALOMON 1969 TRUST

                              By: /s/ Richard E. Salomon
                                 ----------------------------------------
                              Name:  Richard E. Salomon
                              Title:    Trustee


                              William G. Spears

                              By:  Rockmark Corporation, attorney-in-fact

                                  /s/ Richard E. Salomon 
                              -------------------------------------------
                              Name:  Richard E. Salomon
                              Title:    President



                              George M. Topliff

                              By:  Rockmark Corporation, attorney-in-fact

                                  /s/ Richard E. Salomon 
                              -------------------------------------------
                              Name:  Richard E. Salomon
                              Title:    President

                                      -37-

 
                              WINROCK INTERNATIONAL INSTITUTE FOR AGRICULTURAL
                              DEVELOPMENT

                              By:  Rockmark Corporation, attorney-in-fact

                                  /s/ Richard E. Salomon  
                              -------------------------------------------
                              Name:  Richard E. Salomon
                              Title:    President

                              WRTEC, INC.

                              By:  Rockmark Corporation, attorney-in-fact

                                   /s/ Richard E. Salomon 
                              -------------------------------------------
                              Name:  Richard E. Salomon
                              Title:    President

                              John O. Wolcott

                              By:  Rockmark Corporation, attorney-in-fact

                                  /s/ Richard E. Salomon  
                              -------------------------------------------
                              Name:  Richard E. Salomon
                              Title:    President

                                      -38-

 
                                                                  Exhibit 99.3
                                                                  Execution Copy

                            CONTRIBUTION AGREEMENT


                                 BY AND AMONG


                            BOSTON PROPERTIES, INC;


                    BOSTON PROPERTIES LIMITED PARTNERSHIP;


                      THREE EMBARCADERO CENTER WEST; AND


                     THOSE PERSONS (OTHER THAN PRUDENTIAL)
                      LISTED ON EXHIBIT A ATTACHED HERETO

 
                               TABLE OF CONTENTS

                                   ARTICLE I

 Section 1.1. Definitions................................................ 2


                                  ARTICLE II

 Section 2.1 Contribution................................................ 4


                                  ARTICLE III

DUE DILIGENCE/CONDITION OF 3ECW BUILDING................................. 4

 Section 3.1 Transferee Parties' Inspections and Due Diligence........... 4
 Section 3.2 Property Sold "As Is........................................ 5


                                  ARTICLE IV

REPRESENTATIONS AND WARRANTIES AS TO THE PROPERTY AND
THE 3ECW BUILDING........................................................ 9

 Section 4.1 General Statement..........................................  9
 Section 4.2 Attribution................................................ 10
 Section 4.3 Representations and Warranties 
             Re: 3ECW Business and 3ECW Building........................ 10
 Section 4.4 Qualifications to Representations and Warranties........... 12
 Section 4.5 Due Formation, Etc......................................... 12


                                   ARTICLE V

REPRESENTATIONS AND WARRANTIES AS TO 3ECW PARTNERS...................... 13

 Section 5.1 General Statement.......................................... 13
 Section 5.2 Attribution................................................ 13
 Section 5.3 Due Organization; Authorization; Other Matters............. 13 
 Section 5.4 Securities Laws............................................ 14


                                  ARTICLE VI

REPRESENTATIONS AND WARRANTIES OF PUBLIC COMPANY........................ 15

 Section 6.1 General Statement.......................................... 15 
 Section 6.2 Attribution................................................ 15
 Section 6.3 Representations and Warranties 
             Re: Public Company Business and Operations................. 15
 Section 6.4 Due Organization, Etc. of Public Company................... 18

                                       i

 
                                  ARTICLE VII

REPRESENTATIONS AND WARRANTIES OF INVESTOR.............................. 18

 Section 7.1 General Statement.......................................... 18
 Section 7.2 Attribution................................................ 18
 Section 7.3 Representations and Warranties 
             Re: Investor Business and Operations....................... 19
 Section 7.4 Due Formation, Etc. of Investor............................ 20


                                  ARTICLE VIII

LIMITATIONS............................................................. 20

 Section 8.1 Limitations................................................ 20


                                   ARTICLE IX

COVENANTS............................................................... 21

 Section 9.1 Confidentiality............................................ 21
 Section 9.2 Public Statements.......................................... 22
 Section 9.3 Survival................................................... 22


                                   ARTICLE X

CLOSING................................................................. 23

 Section 10.1 Closing Deliveries........................................ 23
 Section 10.2 3ECW Contribution Value; Allocations...................... 24
 Section 10.3 Apportionment Credit...................................... 24
 Section 10.4 Delayed Adjustment........................................ 25
 Section 10.5 Survivability............................................. 25
 Section 10.6 Closing Costs............................................. 25


                                   ARTICLE XI

BREACH, DEFAULT, LIABILITY LIMITS....................................... 25

 Section 11.1 Rights of Investor and Public Company..................... 25
 Section 11.2 Rights of 3ECW and 3ECW Partners.......................... 27


                                  ARTICLE XII

MISCELLANEOUS........................................................... 27

 Section 12.1  Expenses................................................. 28
 Section 12.2  Amendment................................................ 28
 Section 12.3  Notices.................................................. 28
 Section 12.4  Waivers.................................................. 29
 Section 12.5  Counterparts............................................. 29
 Section 12.6  Interpretation........................................... 29
 Section 12.7  Governing Law............................................ 29
 Section 12.8  Assignment............................................... 29
 Section 12.9  No Third Party Beneficiaries............................. 29

                                       ii

 
 Section 12.10 Further Assurances....................................... 30
 Section 12.11 Severability............................................. 30
 Section 12.12 Remedies Cumulative...................................... 30
 Section 12.13 Entire Understanding..................................... 30
 Section 12.14 Consent to Jurisdiction and Service of Process........... 30
 Section 12.15 Waiver of Jury Trial..................................... 30
 
Exhibit A  -  List of 3ECW Partners

Exhibit B  -  Investor Agreement

Exhibit C  -  Registration Rights Agreement

Exhibit D  -  Title Commitment

Exhibit E  -  Tax Reporting Agreement

Exhibit F  -  Assignment of Partnership Interest

Exhibit G  -  Existing Mortgages
 

                                      iii

 
                            CONTRIBUTION AGREEMENT

     This CONTRIBUTION AGREEMENT (this "AGREEMENT"), is made and entered into as
of November 12, 1998, by and among BOSTON PROPERTIES, INC., a Delaware
corporation ("PUBLIC COMPANY"), BOSTON PROPERTIES LIMITED PARTNERSHIP, a
Delaware limited partnership ("INVESTOR"), THREE EMBARCADERO CENTER WEST, a
California limited partnership ("3ECW"), and the Partners in 3ECW on the date of
the Transaction Agreement and  listed on Exhibit A attached hereto 
                                         ---------                           
(the "3ECW PARTNERS").

                              W I T N E S S E T H
                              - - - - - - - - - -

     WHEREAS, this Agreement is hereby executed, and the transactions described
herein are being consummated concurrently with certain other transactions,
pursuant to (and in accordance with) that certain Master Transaction Agreement
dated as of September 28, 1998, by and among The Prudential Insurance Company of
America, PIC Realty Corporation, certain persons listed on Exhibit A attached
thereto, ECIP, 3ECW, Fedmark Corporation, Pacific Property Services, L.P.,
Investor and Public Company (the "TRANSACTION AGREEMENT") (all initially
capitalized terms used herein without definition shall have the meanings given
such terms in the Transaction Agreement);

     WHEREAS, the 3ECW Partners own, collectively, all of the interests in 3ECW
(other than those owned by Prudential) listed on Exhibit A attached hereto , and
the 3ECW Partners desire to contribute to Investor their respective partnership
interests in 3ECW as listed on Exhibit A solely in exchange for Investor
Preferred Units (as defined below), all on the terms and conditions described
herein;

     WHEREAS, concurrently with the Closing of the transactions described in
this Agreement, Investor is amending and restating its partnership agreement by
executing a Certificate of Designation to such Partnership Agreement which
creates a class of Series Two Preferred Units, substantially in the form
attached hereto as Exhibit B (the "INVESTOR AGREEMENT") and admitting the 3ECW
                   ---------                                                  
Partners as additional Limited Partners of Investor with the number of Series
Two  Preferred Units determined herein ; and

     WHEREAS, concurrently with the consummation of the transactions
contemplated by this Agreement, Public Company and the 3ECW Partners, among
others, are executing a Registration Rights Agreement substantially in the form
attached hereto as Exhibit C (the "REGISTRATION RIGHTS AGREEMENT").
                   ---------                                       

     NOW, THEREFORE, in consideration of the foregoing and of the mutual
covenants and agreements contained in this Agreement, and for other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto agree as follows:

                                      -1-

 
                                   ARTICLE I

                                  DEFINITIONS
                                  -----------

     SECTION 1.1.  DEFINITIONS.  In addition to the terms defined in the
                   -----------                                          
Transaction Agreement and elsewhere in this Agreement, the following terms shall
have the meanings set forth herein for the purposes of the transactions
described in this Agreement:

     "BUILDING MAXIMUM LIABILITY AMOUNT" has the meaning set forth in 
                                                                      
Section 11.1(a).
- ------- ------- 

     "BUSINESS DAY" means any day of the year other than Saturday, Sunday or any
other day on which banks located in Boston, Massachusetts are authorized to
close for business.

     "CLOSING" has the meaning set forth in Section 10.1(a).
                                            --------------- 

     "CLOSING DATE" has the meaning set forth in Section 10.1(a).
                                                 --------------- 

     "CONFIDENTIAL MATERIAL" has the meaning set forth in Section 9.1(a).
                                                          -------------- 

     "CONTRACTS" has the meaning set forth in Section 4.3(f).
                                              -------------- 

     "DOCUMENTS" has the meaning set forth in Section 3.1(a).
                                              -------------- 

     "3ECW" has the meaning given such term in the Introductory Paragraph.

     "3ECW BUILDING" means the building commonly known as Embarcadero Center
West, having an address at 275 Battery Street, San Francisco, California.

     "3ECW CONTRIBUTION VALUE" has the meaning set forth in Section 10.2.
                                                            ------------ 

     "3ECW EXISTING DEBT BALANCE" shall mean the total unpaid balance (including
all principal and accrued and unpaid interest) of all Existing Mortgages secured
by 3ECW on the Closing Date and the Three ECW Swap Notes and the Three ECW I/P
Loans.

     "3ECW KNOWLEDGE PARTY" has the meaning set forth in Section 4.2.
                                                         ----------- 

     "3ECW PARTIES" " has the meaning given such term in the Introductory
Paragraph.

     "3ECW PARTNERS' WARRANTIES" has the meaning set forth in Section 3.2(a).
                                                              -------------- 
has the meaning set forth in Section 3.2(a).
                             -------------- 

     "3ECW PARTNERS KNOWLEDGE PARTIES" has the meaning set forth in Section 5.2.
                                                                    ----------- 

     "3ECW PARTNERS" means those persons listed on Exhibit A hereto.
                                                   ---------        

     "3ECW VALUE" has the meaning set forth in Section 10.2.
                                               ------------ 

     "ENCUMBRANCE DOCUMENTS" has the meaning set forth in Section 4.3(i).
                                                          -------------- 

                                      -2-

 
     "EXISTING MORTGAGES" means those certain mortgages described on  Exhibit G
annexed hereto.

     "HAZARDOUS MATERIALS" means any substance, chemical, waste or material that
is or becomes regulated by any federal, state or local governmental authority
because of its toxicity, infectiousness, radioactivity, explosiveness,
ignitability, corrosiveness or reactivity, including, without limitation,
asbestos or any substance containing more than O.1 percent asbestos, the group
of compounds known as polychlorinated byphenyls, flammable explosives, oil,
petroleum or other refined petroleum product.

     "INVESTOR" has the meaning given such term in the Introductory Paragraph.

     "INVESTOR AGREEMENT" has the meaning given such term in the preamble.

     "INVESTOR KNOWLEDGE PARTIES" has the meaning set forth in Section 7.2.
                                                               ----------- 

     "INVESTOR PREFERRED UNITS" means the Series Two Preferred Units as set
forth in the Investor Agreement.

     "LIMITATION DATE" has the meaning set forth in Article VIII.
                                                    ------------ 

     "PERMITTED EXCEPTIONS" means the Permitted Exceptions as defined in the
Transaction Agreement pertain to the Building owned by 3ECW.

     "PROPERTY" means the 3ECW Partners' partnership interests in 3ECW as
reflected in the 3ECW Partnership Agreement as of  the date of the Transaction
Agreement.

     "PROVIDING PARTY" has the meaning set forth in Section 9.1(a).
                                                    -------------- 

     "PUBLIC COMPANY" has the meaning given such term in the Introductory
Paragraph.

     "PUBLIC COMPANY KNOWLEDGE PARTIES" has the meaning set forth in 
                                                                     
Section 6.2.
- -----------
 
     "RECEIVING PARTY" has the meaning set forth in Section 9.1(a).
                                                    -------------- 

     "REGISTRATION RIGHTS AGREEMENT" has the meaning given such term in the
preamble.

     "REPRESENTATIVES" has the meaning set forth in Section 9.1(a).
                                                    -------------- 

     "SECURITIES" means, as applicable, the Shares, and the Investor Preferred
Units that may be issued pursuant to the Investor Agreement.

     "SECURITIES ACT" means the Securities Act of 1933, as amended.

     "SHARES" means the shares of the Public Company's common stock, $0.01 par
value per share.

                                      -3-

 
     "TAX RETURN" means any return, report or other document or information
required to be supplied to a taxing authority in connection with Taxes.

     "TAXES" means all taxes, charges, fees, levies or other assessments,
including, without limitation, income, gross receipts, excise, property, sales,
withholding, social security, occupation, use, service, license, payroll,
franchise, transfer and recording taxes, fees and charges, imposed by the United
States, or any state, local or foreign government or subdivision or agency
thereof, whether computed on a separate, consolidated, unitary, combined or any
other basis; and such terms shall include any interest, fines, penalties or
additional amounts attributable to or imposed on or with respect to any such
taxes, charges, fees, levies or other assessments.

     "TRANSACTION AGREEMENT" has the meaning given such term in the preamble.

     "TRANSFEREE PARTIES" has the meaning set forth in Section 3.2(b)(i).
                                                       ----------------- 

     "TRANSFEREE PARTY-COVERED CLAIMS" has the meaning set forth in Section
                                                                    -------
3.2(b)(i).
- --------- 
                                   ARTICLE II

                                  CONTRIBUTION
                                  ------------

          SECTION 2.1  CONTRIBUTION.  Subject to the terms and conditions set
                       ------------                                          
     forth in this Agreement, the 3ECW Partners are concurrently herewith
     contributing to Investor (and Investor is accepting) the Property in
     exchange for an aggregate number of Investor Preferred Units equal to (i)
     the aggregate percentage interest of the 3ECW Partners times (ii) the 3ECW
     Contribution Value, divided by (iii) $50. Each 3ECW Partner's contribution
     is being made in exchange for a number of Investor Preferred Units equal to
     (A) the ratio of such Partner's percentage interest in 3ECW, as set forth
     on Exhibit A to Exhibit F hereto, to the aggregate percentage interests in
     3ECW of all the 3ECW Partners times (B) such aggregate number of  Investor
     Preferred Units.  The 3ECW Partners acknowledge that the first quarterly
     distribution paid by Investor with respect to the Investor Preferred Units
     shall be with be with respect to such quarterly distribution period ending
     Nov. 16, 1998 and shall be prorated based on the number of days, commencing
     at 12:01 AM on the Closing Date, during such period for which such Units
     are outstanding.


                                  ARTICLE III

                   DUE DILIGENCE/CONDITION OF 3ECW BUILDING
                   ----------------------------------------

     SECTION 3.1  TRANSFEREE PARTIES' INSPECTIONS AND DUE DILIGENCE.
                  ------------------------------------------------- 

               (A)  Due Diligence Approval.  Investor and Public Company each
                    ----------------------                                   
     hereby acknowledges and agrees that, as of the date of the execution of
     this Agreement, it has been given the full opportunity to review, inspect
     and investigate all of the files known or made available to Investor
     maintained by PPS on behalf of 3ECW and PPS relating to the Property, and
     3ECW Building that it deems necessary to review (the "DOCUMENTS"), and 

                                      -4-

 
     has had an opportunity to conduct a thorough review, investigation, and
     inspection of the physical (including, without limitation, the seismic load
     bearing capabilities), environmental, economic, and legal conditions of the
     3ECW Building, the laws, regulations, covenants, conditions, and
     restrictions affecting or governing the use or operation of 3ECW, the 3ECW
     Building, or the Property, the rentable square footage of the 3ECW
     Building, and all other matters which a prudent buyer of partnership
     interests in a partnership that owns directly or indirectly commercial real
     property should review, inspect or investigate in the course of a due
     diligence review, and Investor and Public Company has each approved the
     condition of 3ECW, the 3ECW Building, and the Property and the results of
     such review, inspection and investigation.

               (B)  Indemnity.  Investor and Public Company shall each
                    ---------                                         
     indemnify, protect, defend, and hold harmless 3ECW (and each of the 3ECW
     Partners) from and against any and all claims, demands, causes of action,
     losses, damages and liabilities, including, without limitation, personal
     injuries and property damage, and shall immediately discharge any liens and
     encumbrances, arising out of acts or omissions of Investor, Public Company
     or any of their agents, contractors, or representatives, committed on or
     about any of the 3ECW Building in the course of any such Person's due
     diligence reviews, inspections and investigations, including, without
     limitation, claims, demands, causes of action, losses, damages and
     liabilities on the part of the tenants and lessees alleging breach of a
     Lease as a result of any such Person's acts or omissions.

               (C)  Survivability.  The terms and provisions of this Section 3.1
                    -------------                                    -----------
     shall survive the Closing.

     SECTION 3.2  PROPERTY SOLD "AS IS".
                  --------------------- 

               (A)  "As Is, Where Is, With All Faults".  INVESTOR AND PUBLIC
                    ----------------------------------                      
     COMPANY EACH ACKNOWLEDGES AND AGREES THAT : (i) EXCEPT FOR THE EXCLUDED
     LIABILITIES, THE PROPERTY (AND THE RESULTING INTEREST IN THE 3ECW BUILDING)
     IS SOLD, AND BUYER ACCEPTS THE PROPERTY (AND ITS CORRESPONDING INTEREST IN
     THE 3ECW BUILDING) ON THE DATE HEREOF, "AS IS, WHERE IS, WITH ALL FAULTS";
     (ii) EXCEPT FOR THE REPRESENTATIONS AND WARRANTIES OF THE 3ECW PARTIES SET
     FORTH IN ARTICLES 4 AND 5, RESPECTIVELY TOGETHER WITH THE REPRESENTATIONS
              ----------     -                                                
     OF EACH 3ECW PARTNER IN ANY CLOSING DOCUMENT IT DELIVERS PURSUANT TO
     SECTION 10.1 (HEREIN COLLECTIVELY CALLED THE "3ECW PARTNERS' WARRANTIES"),
     NONE OF 3ECW, THE 3ECW PARTNERS, THEIR RESPECTIVE SALES AGENTS, NOR ANY
     PARTNER, OFFICER, DIRECTOR, EMPLOYEE, AGENT OR ATTORNEY OF 3ECW OR THE 3ECW
     PARTNERS, THEIR COUNSEL, BROKERS, OR SALES AGENTS, NOR ANY OTHER PERSON
     RELATED IN ANY WAY TO ANY OF THE FOREGOING (ALL OF WHICH PERSONS ARE HEREIN
     COLLECTIVELY CALLED THE "3ECW PARTIES") HAVE OR SHALL BE DEEMED TO HAVE
     MADE ANY VERBAL OR WRITTEN REPRESENTATIONS, WARRANTIES, PROMISES OR
     GUARANTEES 

                                      -5-

 
     (WHETHER EXPRESS, IMPLIED, STATUTORY OR OTHERWISE) TO INVESTOR OR PUBLIC
     COMPANY WITH RESPECT TO 3ECW, THE PROPERTY OR THE 3ECW BUILDING, ANY MATTER
     SET FORTH, CONTAINED OR ADDRESSED IN ANY DOCUMENTS REVIEWED BY INVESTOR OR
     PUBLIC COMPANY (INCLUDING, BUT NOT LIMITED TO, THE ACCURACY AND
     COMPLETENESS THEREOF) OR THE RESULTS OF INVESTOR'S AND PUBLIC COMPANY'S DUE
     DILIGENCE INVESTIGATIONS; AND (iii) INVESTOR AND PUBLIC COMPANY EACH HAS
     CONFIRMED INDEPENDENTLY ALL INFORMATION THAT IT CONSIDERS MATERIAL TO ITS
     ACQUISITION OF THE PROPERTY (AND THE RESULTING INTEREST IN THE 3ECW
     BUILDING) AND THE TRANSACTIONS CONTEMPLATED HEREBY. INVESTOR AND PUBLIC
     COMPANY EACH HEREBY SPECIFICALLY ACKNOWLEDGES THAT, EXCEPT FOR THE 3ECW
     PARTNERS' WARRANTIES, IT IS NOT RELYING ON (AND EACH OF THE 3ECW PARTIES
                                 ---
     DOES HEREBY DISCLAIM AND RENOUNCE) ANY REPRESENTATIONS OR WARRANTIES OF ANY
     KIND OR NATURE WHATSOEVER, WHETHER ORAL OR WRITTEN, EXPRESS, IMPLIED,
     STATUTORY OR OTHERWISE, FROM ANY OF THE 3ECW PARTIES, AS TO: (1) THE
     OPERATION OF THE PROPERTY, 3ECW AND 3ECW BUILDING OR THE INCOME POTENTIAL,
     USES, OR MERCHANTABILITY OR FITNESS OF ANY PORTION OF THE PROPERTY OR 3ECW
     BUILDING FOR A PARTICULAR PURPOSE; (2) THE PHYSICAL CONDITION OF THE 3ECW
     BUILDING OR THE CONDITION OR SAFETY OF THE 3ECW BUILDING OR ANY
     IMPROVEMENTS THEREON; (3) THE PRESENCE OR ABSENCE, LOCATION OR SCOPE OF ANY
     HAZARDOUS MATERIALS IN, AT, OR UNDER THE 3ECW BUILDING; (4) THE ACCURACY OF
     ANY STATEMENTS, CALCULATIONS OR CONDITIONS STATED OR SET FORTH IN 3ECW'S OR
     PPS'S BOOKS AND RECORDS CONCERNING THE PROPERTY AND/OR THE 3ECW BUILDING OR
     SET FORTH IN ANY OF THE 3ECW PARTNERS' OFFERING MATERIALS WITH RESPECT TO
     THE PROPERTY, 3ECW AND/OR THE 3ECW BUILDING; (5) THE DIMENSIONS OF THE 3ECW
     BUILDING OR THE ACCURACY OF ANY FLOOR PLANS, SQUARE FOOTAGE, LEASE
     ABSTRACTS, SKETCHES, REVENUE OR EXPENSE PROJECTIONS RELATED TO THE 3ECW
     BUILDING; (6) THE OPERATING PERFORMANCE, THE INCOME AND EXPENSES OF THE
     PROPERTY AND/OR 3ECW BUILDING OR THE ECONOMIC STATUS OF THE PROPERTY AND/OR
     3ECW BUILDING; (7) THE ABILITY OF INVESTOR AND PUBLIC COMPANY TO OBTAIN ANY
     AND ALL NECESSARY GOVERNMENTAL APPROVALS OR PERMITS FOR THE INTENDED USE
     AND DEVELOPMENT OF THE 3ECW BUILDING; AND (8) THE LEASING STATUS OF THE
     3ECW BUILDING OR THE INTENTIONS OF ANY PERSONS WITH RESPECT TO THE
     NEGOTIATION AND/OR EXECUTION OF ANY LEASE FOR ANY PORTION OF THE 3ECW
     BUILDING. INVESTOR AND PUBLIC COMPANY EACH FURTHER ACKNOWLEDGES AND AGREES
     THAT, EXCEPT FOR THE 3ECW PARTNERS' WARRANTIES, THE 3ECW PARTIES ARE UNDER
     NO DUTY TO MAKE ANY AFFIRMATIVE DISCLOSURES OR INQUIRY REGARDING ANY MATTER
     WHICH MAY BE KNOWN TO ANY OF THE 3ECW PARTIES.

                                      -6-

 
               (B)  Release and Indemnity.  INVESTOR'S AND PUBLIC COMPANY'S
                    ---------------------                                  
     RELEASE AND INDEMNITY:

               (i)   INVESTOR AND PUBLIC COMPANY EACH HEREBY ASSUMES ALL
     RISKS WITH RESPECT TO THE PROPERTY (AND ITS RESULTING INTEREST IN THE
     3ECW BUILDING), KNOWN AND UNKNOWN, SUSPECTED AND UNSUSPECTED,
     EXCEPTING ONLY THE EXCLUDED LIABILITIES (AS DEFINED IN SECTION 3.2 (b)
     (ii) BELOW). EXCEPT AS OTHERWISE EXPRESSLY PROVIDED IN SECTION
     3.2(b)(ii) BELOW WITH RESPECT TO EXCLUDED LIABILITIES AND SECTION
     3.2(b)(iii) BELOW WITH RESPECT TO THE 3ECW PARTIES' WARRANTIES,
     INVESTOR, PUBLIC COMPANY AND THEIR AGENTS, EMPLOYEES, AFFILIATES,
     SUCCESSORS AND ASSIGNS (COLLECTIVELY, "TRANSFEREE PARTIES"), SHALL BE
     SOLELY LIABLE FOR, AND SHALL INDEMNIFY, DEFEND, PROTECT AND HOLD
     HARMLESS THE 3ECW PARTIES FROM ANY AND ALL CLAIMS, DEMANDS, CAUSES OF
     ACTION, LOSSES, LIABILITIES, COSTS AND EXPENSES (INCLUDING REASONABLE
     ATTORNEYS' FEES) AT LAW OR IN EQUITY, KNOWN OR UNKNOWN, SUSPECTED OR
     UNSUSPECTED, RELATING TO BODILY INJURY, DEATH, PROPERTY DAMAGE,
     ECONOMIC LOSS, OR OTHER DAMAGES SUFFERED BY ANY OF THE 3ECW PARTIES
     ARISING OUT OF OR RELATING TO THE PROPERTY AND/OR THE 3ECW BUILDING ,
     INCLUDING, WITHOUT LIMITATION, THE PHYSICAL, ENVIRONMENTAL, ECONOMIC,
     LEGAL OR OTHER CONDITION OF THE 3ECW BUILDING, INCLUDING, WITHOUT
     LIMITATION, ANY SUCH CLAIMS OR LIABILITIES RELATING TO THE PRESENCE,
     DISCOVERY OR REMOVAL OF ANY HAZARDOUS MATERIALS IN, AT, ABOUT OR UNDER
     THE 3ECW BUILDING, OR FOR, CONNECTED WITH OR ARISING AFTER THE DATE
     HEREOF OUT OF ANY AND ALL CLAIMS OR CAUSES OF ACTION BASED UPON CERCLA
     (COMPREHENSIVE ENVIRONMENTAL RESPONSE, COMPENSATION, AND LIABILITY ACT
     OF 1980, 42 U.S.C. (S)(S)9601 ET SEQ., AS AMENDED BY SARA [SUPERFUND
     AMENDMENT AND REAUTHORIZATION ACT OF 1986] AND AS MAY BE FURTHER
     AMENDED FROM TIME TO TIME), THE RESOURCE CONSERVATION AND RECOVERY ACT
     OF 1976, 42 U.S.C. (S)(S)6901 ET SEQ., OR ANY RELATED CLAIMS OR CAUSES
     OF ACTION OR ANY OTHER FEDERAL OR STATE BASED STATUTORY OR REGULATORY
     CAUSES OF ACTION FOR ENVIRONMENTAL CONTAMINATION AT, IN OR UNDER THE
     3ECW BUILDING (HEREINAFTER "TRANSFEREE PARTY-COVERED CLAIMS").
     
               (ii)  NOTWITHSTANDING THE FOREGOING, THE TERM "TRANSFEREE
     PARTY COVERED CLAIMS' SHALL EXCLUDE, AND INVESTOR SHALL NOT ASSUME,
     ANY AND ALL OBLIGATIONS 

                                      -7-

 
     AND LIABILITIES ("EXCLUDED LIABILITIES') ARISING FROM OR IN CONNECTION WITH
     THE USE, OWNERSHIP OR OPERATION OF THE PROPERTY AND/OR 3ECW BUILDING
     ACCRUING PRIOR TO THE CLOSING DATE OTHER THAN (A) OBLIGATIONS AND
     LIABILITIES ASSUMED IN WRITING BY INVESTOR AND PUBLIC COMPANY IN CONNECTION
     WITH THE LEASES AND/OR CONTRACTS AND ALL OTHER OBLIGATIONS AND LIABILITIES
     THAT THE INVESTOR EXPRESSLY ASSUMES IN WRITING AT OR PRIOR TO THE CLOSING,
     (B) OBLIGATIONS AND LIABILITIES FOR WHICH INVESTOR HAS RECEIVED A PRORATION
     CREDIT PURSUANT TO EXHIBIT V OF THE TRANSACTION AGREEMENT, AND (C)
     OBLIGATIONS AND LIABILITIES RELATING IN ANY WAY TO THE PHYSICAL OR
     ENVIRONMENTAL CONDITION OF THE 3ECW BUILDING OTHER THAN ANY CLAIMS MADE BY
     ,OR CAUSES OF ACTION BROUGHT BY, ANY THIRD PARTY UNRELATED TO INVESTOR OR
     PUBLIC COMPANY OR ANY OF THEIR AFFILIATES WHERE THE INJURY OR DAMAGE GIVING
     RISE TO SUCH CLAIM OR CAUSE OF ACTION AROSE OR OCCURRED DURING THE PERIOD
     PRIOR TO THE CLOSING DATE.
     
               (ii)  TRANSFEREE PARTIES EACH HEREBY GENERALLY AND FULLY
     RELEASE THE 3ECW PARTIES FROM ANY AND ALL STATEMENTS OR OPINIONS
     HERETOFORE MADE, OR INFORMATION FURNISHED IN CONNECTION WITH THE
     TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT, BY THE 3ECW PARTIES TO
     ANY OF THE TRANSFEREE PARTIES, EXCEPT FOR THE 3ECW PARTNERS'
     WARRANTIES; AND FROM ANY AND ALL TRANSFEREE PARTY-COVERED CLAIMS,
     KNOWN OR UNKNOWN, SUSPECTED OR UNSUSPECTED.
     
               WITH RESPECT TO THE RELEASES AND WAIVERS CONTAINED IN THIS
                                                                         
     SUBSECTION 3.2(b)(ii), THE TRANSFEREE PARTIES EXPRESSLY WAIVE THE
     ---------------------                                            
     BENEFITS OF SECTION 1542 OF THE CALIFORNIA CIVIL CODE, WHICH PROVIDES
     AS FOLLOWS:
     
               "A GENERAL RELEASE DOES NOT EXTEND TO CLAIMS WHICH THE
          CREDITOR DOES NOT KNOW OR SUSPECT TO EXIST IN HIS FAVOR AT THE
          TIME OF EXECUTING THE RELEASE, WHICH IF KNOWN BY HIM MUST HAVE
          MATERIALLY AFFECTED HIS SETTLEMENT WITH THE DEBTOR."
     
               INVESTOR AND PUBLIC COMPANY HAS EACH BEEN ADVISED BY ITS
     LEGAL COUNSEL AND UNDERSTANDS THE SIGNIFICANCE OF THIS WAIVER OF
     SECTION 1542 RELATING TO UNKNOWN, UNSUSPECTED AND CONCEALED CLAIMS.
     BY ITS 

                                      -8-

 
     INITIALS BELOW, EACH OF INVESTOR AND PUBLIC COMPANY ACKNOWLEDGES THAT IT
     FULLY UNDERSTANDS, APPRECIATES, AND ACCEPTS ALL OF THE TERMS OF THIS
     SUBSECTION 3.2(b)(ii).
     ---------------------

                                    _________________________
                                    Investor's Initials
     
                                    _________________________
                                    Public Company's Initials
     

               (iv) NOTWITHSTANDING THE FOREGOING, THE 3ECW PARTNERS SHALL
     BE SOLELY LIABLE FOR, AND SHALL INDEMNIFY, DEFEND (AND CONTROL THE
     RESOLUTION OF ), PROTECT AND HOLD HARMLESS INVESTOR AND PUBLIC COMPANY
     FROM ANY AND ALL CLAIMS, DEMANDS, CAUSES OF ACTION, LOSSES,
     LIABILITIES, COSTS AND EXPENSES (INCLUDING REASONABLE ATTORNEY'S FEES)
     AT LAW OR IN EQUITY, KNOWN OR UNKNOWN, SUSPECTED OR UNSUSPECTED,
     RELATING TO BODILY INJURY, DEATH, PROPERTY DAMAGE, ECONOMIC LOSS, OR
     OTHER DAMAGES SUFFERED BY 3ECW OR THE PROPERTY ARISING OUT OF OR
     RELATING TO THE EXCLUDED LIABILITIES.
     
          (C)  Provisions Material.  Investor and Public Company each
               -------------------                                   
  acknowledges and agrees that the provisions of this Article 3 were a
                                                      ---------       
  material factor in the acceptance of the 3ECW Contribution Value by the
  3ECW Partners and, while the 3ECW Partners have made the Documents
  available to Investor and Public Company and cooperated with Investor and
  Public Company in their due diligence investigations and inspections, the
  3ECW Partners are unwilling to contribute the Property unless the 3ECW
  Parties are expressly released as set forth in Subsection 3.2(b)(ii).
                                                 --------------------- 
  
            (D)  Survivability.  Notwithstanding anything to the contrary
                 -------------                                           
  herein, the provisions of this Section 3.2 shall survive the Closing and
                                 -----------                              
  shall not be merged in any contribution of the Property.

                                   ARTICLE IV

    REPRESENTATIONS AND WARRANTIES AS TO THE PROPERTY AND THE 3ECW BUILDING
    -----------------------------------------------------------------------

     SECTION 4.1  GENERAL STATEMENT.  The 3ECW Partners make the representations
                  -----------------                                             
and warranties with respect to the Property and the 3ECW Building to Investor
and Public Company which are set forth in this Article IV.  All representations
                                               ----------                      
and warranties set forth in Section 4.3 shall survive the Closing (and none
                            -----------                                    
shall merge into any instrument of conveyance) for the period of time set forth
in Article VIII and shall be subject to the limitations of Section 11.1
   ------------                                            ------------

                                      -9-

 
(provided, however, that the representations in Section 4.3(a), (b) and (c)
                                                ---------------------------
shall not be subject to the Building Maximum Liability Amount in Section 11.1 or
                                                                 ------------   
the $43,000,000 limitation of Section 12.1.2 of the Transaction Agreement) ,and
all representations and warranties set forth in Section 4.5 hereof shall,
                                                -----------              
subject to the limitations of Section 11.1, survive the Closing (and none shall
                              ------------                                     
merge into any instrument of conveyance) for the period of any relevant statute
of limitations therefor. All  Representations and warranties are made as of the
date of this Agreement.


     SECTION 4.2  ATTRIBUTION.  For purposes of this Agreement, the words
                  -----------                                            
"knowledge of 3ECW" or "3ECW's knowledge" shall mean the actual and not
constructive knowledge of Richard E. Salomon, President of Fedmark Corporation,
the general partner of 3ECW, Thomas Hendrian and John Syage of PPS and John
Treice of Prudential Insurance Company of America (the "3ECW KNOWLEDGE PARTY").
The 3ECW Knowledge Party shall have no liability of any kind in their capacity
as a 3ECW Knowledge Party.  Any fact, matter or other statement shall not be
deemed to be within the knowledge of 3ECW or 3ECW's knowledge unless the 3ECW
Knowledge Party has actual knowledge of such fact, matter or other statement.
Notwithstanding the foregoing, the representations and warranties made by the
3ECW Partners under Section 4.5 below are intended to be absolute in nature and
                    -----------                                                
are not limited by the knowledge or attribution limitations of this Section 4.2.
                                                                    ----------- 

     SECTION 4.3  REPRESENTATIONS AND WARRANTIES RE: 3ECW BUSINESS AND 3ECW
                  ---------------------------------------------------------
BUILDING.  The 3ECW Partners hereby severally (and not jointly) represent and
- --------                                                                     
warrant to Investor except as set forth on any Schedule attached hereto and
                                               --------                    
referred to below and Public Company that:

               (A) The execution and delivery of this Agreement and the other
     documents to be executed by 3ECW in connection herewith, and the
     consummation of the transactions described in this Agreement and such
     documents do not require, to the knowledge of 3ECW, the consent or approval
     of any governmental authority, nor to 3ECW's knowledge does the execution
     and delivery of this Agreement and the other documents to be executed by
     3ECW in connection herewith violate, in any way material to the
     transactions described herein, any contract or agreement to which 3ECW is a
     party or (to the knowledge of 3ECW) any governmental or judicial order,
     judgment, decree, statute, law, rule or regulation applicable to 3ECW, and
     this Agreement and all documents to be executed by 3ECW in connection with
     the transactions described herein constitute the legal, valid and binding
     obligations of 3ECW.

               (B) To 3ECW's knowledge, 3ECW is not a party to, or bound by, any
     unexpired, undischarged or unsatisfied contract, agreement, indenture,
     mortgage (other than the Existing Mortgages), debenture, note or other
     instrument under the terms of which performance by 3ECW in accordance with
     the terms and provisions of this Agreement will be a default or an event of
     acceleration, or grounds for termination, and whereby such default,
     acceleration or termination would reasonably be expected to have a material
     adverse effect on the timely performance by 3ECW under this Agreement and
     the other documents to be executed by 3ECW in connection herewith, nor does
     

                                      -10-

 
     the execution of this Agreement or the other documents to be executed by
     3ECW in connection herewith, or the consummation of the transactions
     contemplated hereby and thereby, violate the partnership agreement of 3ECW
     or constitute a breach thereunder.

               (C)  3ECW has no employees.

               (D)  To 3ECW's knowledge, except as listed on Schedule 4.3(d),
                                                             --------------- 
     3ECW has not received any written notice of pending or threatened
     litigation, judgment, arbitration, investigation or proceeding against 3ECW
     or the 3ECW Building that, if determined adversely, would reasonably be
     expected to have a material adverse effect on the operation, use or value
     of 3ECW or 3ECW Building or on the Investor's ability to obtain any
     financing necessary to close the transactions contemplated by this
     Agreement, nor has 3ECW received any explicit oral notice of any such
     threatened litigation, judgment, arbitration, investigation or proceeding.

               (E)  To 3ECW's knowledge, except as listed on Schedule 4.3(e),
                                                            --------------- 
     there are no Claims or liabilities affecting 3ECW or 3ECW Building that
     have not been previously disclosed in writing to Investor, Public Company
     or any of their Affiliates which would be binding upon Investor after
     Closing and have a material adverse effect on the operation, use or value
     of  3ECW or 3ECW Building or on Investor's ability to obtain any financing
     necessary to close the transactions contemplated by this Agreement.

               (F)  To 3ECW's knowledge, except as listed on Schedule 4.3(f),
                                                            --------------- 
     3ECW has not received any written notice from any governmental authority of
     any special assessment, pending condemnation, and to 3ECW's knowledge 3ECW
     is not in violation and has not received notice of violation of any zoning,
     building, fire, or health code, statute, ordinance, rule or regulation
     applicable to the 3ECW Building that would reasonably be expected to have a
     material adverse effect on the operation, use or value of the 3ECW Building
     or on the Investor's ability to obtain any financing necessary to close the
     transactions contemplated by this Agreement.

               (G)  To 3ECW's knowledge, neither 3ECW nor any other Person has
     entered into any written equipment leases, service contracts or other such
     contracts or agreements affecting 3ECW or 3ECW Building which will remain
     in effect after the Closing Date and which will be binding upon Investor
     after the Closing Date and which are not terminable or cancelable upon
     thirty (30) days notice (collectively, "CONTRACTS") other than those listed
     on Exhibit 4.3(g) attached hereto.
        --------------                 

               (H)  To 3ECW's knowledge, the only Leases which will encumber the
     3ECW Building after the Closing are listed on Exhibit 4.3(h) attached
                                                   --------------         
     hereto.

               (I)  To 3ECW's knowledge, there are no agreements affecting the
     3ECW Building with third parties for the provision of leasing brokerage
     services or under which leasing commissions would become due from and after
     the Closing, except as set forth on Schedule 4.3(i).
                                         --------------- 

                                      -11-

 
               (J)  To 3ECW's knowledge, 3ECW is not in default and has not
     received any written notice of any defaults under the terms of any of the
     Contracts, Leases or Encumbrance Documents that would have a material
     adverse effect on the use, operation or value of 3ECW or 3ECW Building
     after the Closing or on the Investor's ability to obtain any financing
     necessary to close the transactions contemplated by this Agreement, except
     as set forth on Exhibit D and Schedule 4.3(j).  As used herein, the term
                     ---------     ---------------                           
     "ENCUMBRANCE DOCUMENTS" shall mean, collectively, all mortgages, deeds of
     trust, easements and other material agreements appurtenant to or burdening
     the 3ECW Building.

               (K)  To 3ECW's knowledge, no rent or other amounts (other than
     security deposits) have been prepaid under any of the Leases, Contracts or
     Encumbrance Documents more than thirty (30) days in advance of the due
     dates thereof, except as set forth on Schedule 4.3(k) or, in the case of
                                           ---------------                   
     contracts, the proration schedule attached to Exhibit V of the Transaction
     Agreement (which will be provided on the date required).


     SECTION 4.4  QUALIFICATIONS TO REPRESENTATIONS AND WARRANTIES.  To the
                  ------------------------------------------------         
extent that any of the representations or warranties of the 3ECW Partners under
                                                                               
Section 4.3 are known to Investor, Public Company or any of their Affiliates to
- -----------                                                                    
be inaccurate on the Closing Date and Investor nevertheless closes the
transactions contemplated by this Agreement, such representation(s) and
warranty(ies) shall be deemed modified to the extent of such known inaccuracy
and the 3ECW Partners shall not be deemed in breach of the representation or
warranty.  Notwithstanding anything to the contrary stated or implied herein and
in furtherance of the foregoing provisions of this Section 4.4, the 3ECW
                                                   -----------          
Partners shall have no liability for or with respect to any representation or
warranty (or breach thereof) from and after the Closing if, prior to the
Closing, the Investor, Public Company or any of their Affiliates discovers or
learns of information (from whatever source, including, without limitation,
3ECW, the 3ECW Partners or any of their employees), or any reports, instruments
or other documentation which were reviewed by or made available for review by
Investor, Public Company or any of their Affiliates in connection with the
transactions contemplated hereby (including, without limitation, any reports,
surveys, and other due diligence documentation procured independently by
Investor, Public Company or any of their Affiliates in connection with the
transactions contemplated hereby) contain information that contradicts such
representation and warranty, or renders such representation and warranty untrue
or incorrect.


     SECTION 4.5  DUE FORMATION, ETC. 3ECW is a limited partnership duly formed
                  ------------------                                           
and existing under the laws of the State of California and is not insolvent, and
has all necessary power and authority to execute and deliver this Agreement and
all documents executed by it in connection herewith and to perform all its
obligations hereunder and thereunder.  This Agreement has been duly authorized
by all requisite partnership action on the part of 3ECW.  3ECW is not a Person
other than a United States Person within the meaning of the Code and the
transactions contemplated herein are not subject to the withholding provisions
of section 3406 or subchapter A of Chapter 3 of the Code.

                                      -12-

 
                                   ARTICLE V

               REPRESENTATIONS AND WARRANTIES AS TO 3ECW PARTNERS
               --------------------------------------------------


     SECTION 5.1  GENERAL STATEMENT.  Each of the 3ECW Partners, singly and not
                  -----------------                                            
jointly, hereby makes the representations and warranties to Investor and Public
Company which are set forth in this Article V.  All representations and
                                    ---------                          
warranties set forth in Article 5 shall, subject to the limitations of Section
                        ---------                                      -------
11.1, survive the Closing (and none shall merge into any instrument of
- ----                                                                  
conveyance) for the period of any relevant statute of limitations therefor.
Representations and warranties of the 3ECW Partners are made as of the date of
this Agreement.


     SECTION 5.2  ATTRIBUTION.  For purposes of this Agreement, the words
                  -----------                                            
"knowledge of 3ECW Partners" or "3ECW Partners' knowledge" shall mean the actual
and not constructive knowledge of the particular 3ECW Partners, its Affiliates
and its officers, agents and employees in the context used (the "3ECW PARTNERS
KNOWLEDGE PARTIES") and shall not be construed to refer to the knowledge of any
other 3ECW Partners or any other 3ECW Partner's Affiliates, officers, agents or
employees or to impose or have imposed upon any 3ECW Partners any duty to
investigate the matters to which such knowledge, or absence thereof, pertains.
Any fact, matter or other statement shall not be deemed to be within the
knowledge of the 3ECW Partners or 3ECW Partners' knowledge unless the 3ECW
Partners Knowledge Parties for such 3ECW Partners have actual knowledge of such
fact, matter or other statement.


     SECTION 5.3  DUE ORGANIZATION; AUTHORIZATION; OTHER MATTERS.  Each 3ECW
                  ----------------------------------------------            
Partner hereby, singly and not jointly, represents and warrants to Public
Company and Investor solely as to itself as a 3ECW Partner as follows:

               (A)  Such 3ECW Partner is, if it is other than an individual,
     duly organized or formed, is validly existing and is in good standing under
     the laws of its jurisdiction of organization, and is qualified to do
     business and in good standing in all jurisdictions where such qualification
     is necessary to carry on its business as now conducted, except where the
     failure to so qualify would not have a material adverse effect on the
     ability of such 3ECW Partner to perform its obligations under this
     Agreement.

               (B)  Such 3ECW Partner has full power and authority to enter into
     this Agreement and to consummate the transactions contemplated hereby.

               (C)  Such 3ECW Partner has, and will contribute to Investor at
     the Closing, full, unencumbered title to its interest in 3ECW delivered
     concurrently herewith.

               (D)  The execution, delivery and performance by such 3ECW Partner
     of this Agreement has been duly and validly approved by all necessary
     partnership, corporate or other applicable action and no other actions or
     proceedings on the part of such 3ECW Partner or its shareholders, partners
     or other 3ECW Partners, are necessary to authorize this Agreement and the
     transactions contemplated hereby and thereby.  No consent, waiver,
     approval, or authorization of, or filing, registration, or qualification
     with, or notice to, any governmental instrumentality or any other Person
     (including, without limitation, the other 3ECW Partners) is required to be
     made, obtained, or given in connection with the execution, delivery, and
     performance of this Agreement by such 

                                      -13-

 
     3ECW Partner, except where the failure to do so would not have a material
     adverse effect on such execution, delivery or performance. This Agreement
     constitutes, and any other documents to be executed by such 3ECW Partner
     pursuant to this Agreement when executed will constitute, legal, valid and
     binding obligations of such 3ECW Partner, enforceable against such 3ECW
     Partner in accordance with its terms, except as such enforceability may be
     limited by applicable bankruptcy, insolvency, moratorium, reorganization or
     similar laws in effect which affect the enforcement of creditors' rights
     generally and by equitable limitations on the availability of specific
     remedies.

               (E)  The execution and delivery of this Agreement, and the
     performance by such 3ECW Partner under this Agreement, do not and will not
     conflict with or result in a breach of (with or without the passage of time
     or notice or both) the terms of any of such 3ECW Partner's constituent
     documents (if any), any judgment, order or decree of any governmental
     authority binding on such 3ECW Partner, and, to such 3ECW Partner's
     knowledge, do not breach or violate any applicable law, rule or regulation
     of any governmental authority.  Except as may be provided in the Existing
     Mortgages, the execution, delivery and performance by such 3ECW Partner
     under this Agreement will not result in a breach or violation of (with or
     without the passage of time or notice or both) the terms or provisions of,
     or constitute a default under, any indenture, mortgage, deed of trust, loan
     agreement, the partnership agreement of 3ECW or any other agreement or
     instrument to which such 3ECW Partners is a party or by which such 3ECW
     Partner is bound.

               (F)  Such 3ECW Partner, if other than an individual, is organized
     and, to such 3ECW Partner's knowledge, has conducted its business in
     accordance with all applicable laws, to the extent applicable, the failure
     or the violation of which could reasonably be expected to have a material
     adverse effect on the ability of such 3ECW Partner, in its individual
     capacity, to execute, deliver or perform under this Agreement or to
     consummate the transactions contemplated hereby.


     SECTION 5.4   SECURITIES LAWS.  Subject to the provisions of this 
                   ---------------   
Agreement, each 3ECW Partner hereby represents and warrants that such 3ECW
Partner is acquiring the Investor Preferred Units for its own account and not
with a view to or for sale in connection with any distribution thereof within
the meaning of the Securities Act. Such 3ECW Partner understands that the
Investor Preferred Units (and, subject to the Registration Rights Agreement, the
Shares issuable upon exchange thereof) will not be registered under the
Securities Act or any state securities laws, will be offered and sold pursuant
to exemptions therefrom and cannot be resold without registration thereunder or
exemption therefrom. Such 3ECW Partner represents that it has sufficient
knowledge and experience in financial and business matters to enable it to
evaluate the merits and risks of investment in the Investor Preferred Units (and
the Shares that may be issued in lieu of redemption thereof). Such 3ECW Partner
has the ability to bear the economic risk of acquiring the Investor Preferred
Units. Such 3ECW Partner has been supplied with, or had access to, information
to which a reasonable Investor would attach significance in making investment
decisions, including, but not limited to, all information as it has requested,
to answer all of its inquiries about Public Company, and to enable it to make
its decision to acquire the 

                                      -14-

 
Investor Preferred Units (and the Shares that may be issued in lieu of
redemption thereof). The Securities shall, if represented by certificates,
contain a prominent legend with respect to the foregoing restrictions. Such 3ECW
Partner represents and warrants that he, she or it is an "accredited investor"
as such term is defined in Rule 501 under the Securities Act.


                                   ARTICLE VI

                REPRESENTATIONS AND WARRANTIES OF PUBLIC COMPANY
                ------------------------------------------------


     SECTION 6.1  GENERAL STATEMENT.  Public Company hereby makes the
                  -----------------                                  
representations and warranties to each 3ECW Partner which are set forth in this
                                                                               
Article VI.  All representations and warranties set forth in Sections 6.3 and
- ----------                                                   ------------    
6.4 shall survive the Closing (and none shall merge into any instrument of
- ---                                                                       
conveyance) for the period of any relevant statute of limitations therefor.
Representations and warranties of Public Company are made as of the date of this
Agreement.


     SECTION 6.2  ATTRIBUTION.  For purposes of the representations and
                  -----------                                          
warranties of Public Company set forth in this Article VI only, the words
"knowledge of Public Company" or "Public Company's knowledge" shall mean the
actual and not constructive knowledge of Mortimer Zuckerman, Edward Linde and
Thomas O'Connor (collectively, the "PUBLIC COMPANY KNOWLEDGE PARTIES").  Any
fact, matter or other statement shall not be deemed to be within the knowledge
of Public Company or Public Company's knowledge unless the Public Company
Knowledge Parties, or any of them, have actual knowledge of such fact, matter or
other statement.  Notwithstanding the foregoing, the representations and
warranties made by Public Company under Section 6.4 below are intended to be
                                        -----------                         
absolute in nature and are not limited by the knowledge or attribution
limitations of this Section 6.2.
                    ----------- 


     Section 6.3  REPRESENTATIONS AND WARRANTIES RE: PUBLIC COMPANY BUSINESS AND
                  --------------------------------------------------------------
OPERATIONS.  Public Company hereby represents and warrants as follows:
- ----------                                                            

               (A)  Public Company is organized and, to Public Company's
     knowledge, has conducted its business in accordance with applicable laws,
     to the extent applicable, the failure or the violation of which could
     reasonably be expected to have a material adverse effect on the results of
     operations of the Public Company.

               (B)  There are no actions, suits or proceedings pending and, to
     Public Company's knowledge, no such proceedings are threatened or
     contemplated by governmental authorities or others, which would reasonably
     be expected to either (i) question the validity of this Agreement or the
     consummation of the transactions contemplated hereby, the issuance of the
     Shares (including the Shares that may be issued in lieu of redemption of
     Investor Preferred Units), any other agreements contemplated hereby or any
     actions taken pursuant to any of the foregoing or (ii) result in any
     material adverse change in the condition, financial or otherwise, or in the
     earnings, business affairs, management or business prospects of Public
     Company.  As of the date hereof, there is no  action or suit against Public
     Company pending or threatened by any Person which would reasonably be
     expected to have a material and adverse effect on Public Company.

                                      -15-

 
               (C) The Public Company has filed with the Securities and Exchange
     Commission (the "Commission") all reports required by the Exchange Act to
     be filed by the Company (collectively, and in each case including all
     exhibits and schedules thereto and documents incorporated by reference
     therein, the "SEC Documents"). As of their respective filing dates (or if
     amended, revised or superseded by a subsequent filing with the Commission,
     then on the date of such subsequent filing), the SEC Documents complied in
     all material respects with the requirements of the Securities Act or the
     exchange Act, as the case may be, and none of the SEC Documents (including
     any and all financial statements included therein) as of such dates
     contained any untrue statement of a material fact or omitted to state a
     material fact required to be stated therein or necessary in order to make
     the statements therein, in light of the circumstances under which they are
     made, not misleading. The consolidated financial statements of Public
     Company included in all SEC Documents, including any amendments thereto,
     comply as to form in all material respects with applicable accounting
     requirements and the published rules and regulations of the Commission with
     respect thereto. Since the most recently filed SEC Document, there has not
     occurred or arisen any change in or event affecting Public Company that has
     had or would reasonably be expected to have a material adverse effect on
     the results of operations of Public Company.

               (D)  No proceeding or other action has been commenced or
     undertaken relating to the dissolution or merger of Public Company and none
     is presently contemplated except that this representation shall not apply
     to any merger of another entity with and into Public Company that meets the
     criteria of Section 251(f) of the Delaware General Corporation Law for
     consummating a merger without a vote of stockholders.

               (E)  As of the date of this Agreement, the authorized capital
     securities of Public Company consists of Preferred Stock, $.01 par value,
     50,000,000 Shares authorized, none issued or outstanding, Excess Stock,
     $.01 par value, 150,000,000 shares authorized, none issued or outstanding,
     and 250,000,000 Shares of common stock, $0.01 par value per share, of which
     63,526,785 Shares are currently issued and outstanding.  Except as
     contemplated pursuant to this Agreement, and except for (i) any Shares that
     may be issued in lieu of redemption of outstanding units of limited
     partnership in Investor and (ii) any Shares or units of limited partnership
     in Investor which may be issued in accordance with agreements that have
     been described in or filed with the SEC Filings or otherwise disclosed on
     Schedule 6.3(e), there are no securities convertible or exchangeable for
     Shares or any rights or options to subscribe for or purchase any Shares or
     securities convertible or exchangeable for Shares.  All of the outstanding
     Shares have been duly and validly authorized and issued and are fully paid
     and non-assessable.  All of the outstanding Shares have been issued in
     compliance with all applicable federal and state securities laws.

               (F)  The Shares (including the Shares issuable upon exchange of
     Investor Preferred Units) issuable hereunder, when issued in accordance
     with the provisions of this Agreement and the Investor Agreement, will be
     duly and validly 

                                      -16-

 
     authorized and issued and will be fully paid and non-assessable. Neither
     Public Company, Investor nor any person acting on their behalf has taken or
     will take any action which would subject the issuance of the Investor
     Preferred Units to the 3ECW Partners to the registration requirements of
     Section 5 of the Securities Act.

               (G)  Except as provided in Schedule 6.3(g), Public Company has no
                                          ---------------                       
     obligation (contingent or other) to purchase, redeem or otherwise acquire
     any of its Shares or any interest therein or to pay any dividend or make
     any other distribution in respect thereof (except for any distribution that
     was declared prior to the date hereof and not paid on or before the date
     hereof).  Public Company has authorized and reserved for issuance a
     sufficient number of Shares to satisfy its obligations under this Agreement
     and the Investor's Investor Agreement.

               (H)  Public Company has duly and timely filed with the
     appropriate governmental authorities all Tax Returns required to be filed
     by it for all periods ending on or prior to the Closing Date, except to the
     extent of any Tax Return for which an extension of time for filing has been
     properly filed. Each such Tax Return is true and correct in all material
     respects. All Taxes owed by Public Company have been paid (whether or not
     shown on a Tax Return). All Taxes which Public Company is required by law
     to withhold or collect, including, without limitation, Taxes required to
     have been withheld in connection with amounts paid or owing to any
     employee, independent contractor, creditor, partner, or other third party
     and sales, gross receipts and use taxes, have been duly withheld or
     collected and, to the extent required, have been paid over to the proper
     governmental authorities or are held in separate bank accounts for such
     purpose. There are no liens for Taxes upon the assets of Public Company
     except for statutory liens for Taxes not yet due.

               (I)  Public Company has not filed for an extension of a statute
     of limitations with respect to any Taxes and no governmental authorities
     have requested an extension of the statute of limitations with respect to
     any Taxes. Public Company is not a party to any pending action or any
     formal or informal proceeding by any taxing authority for a deficiency,
     assessment or collection of Taxes, and no claim of any deficiency,
     assessment or collection of Taxes has been asserted or, to the knowledge of
     Public Company, threatened against it, including claims by any taxing
     authority in a jurisdiction where Public Company does not file Tax Returns
     that it is or may be subject to taxation in that jurisdiction.

               (J)  Public Company is organized and has operated from its
     commencement through the date hereof in such a manner so as to qualify for
     taxation as a real estate investment trust under the Code, and Public
     Company intends to operate in such a manner so as to qualify and to
     continue to so qualify as a real estate investment trust.

               (K)  Public Company does not hold "plan assets" within the
     meaning of 29 C.F.R. Section 2510.3-101.

                                      -17-

 
     SECTION 6.4  DUE ORGANIZATION, ETC. OF PUBLIC COMPANY.
                  ---------------------------------------- 

     (A)  Public Company is a corporation duly organized, validly existing and
in good standing under the laws of the State of Delaware, is (or prior to the
Closing will be) duly qualified and in good standing as a foreign corporation
under the laws of the State of California, and has all necessary power,
corporate and otherwise, to execute and deliver this Agreement and all other
documents and instruments to be executed and delivered by Public Company in
connection herewith and to perform all its obligations hereunder and thereunder.
This Agreement has been duly authorized by all requisite corporate action on the
part of Public Company. The execution and delivery of this Agreement and the
other documents and instruments to be executed and delivered by Public Company
in connection with the transactions described herein, and the consummation of
the transactions contemplated hereby and thereby, do not require the consent or
approval of the shareholders of Public Company or, to the knowledge of Public
Company, the consent or approval of any governmental authority, nor, to the
knowledge of Public Company, does the execution and delivery of this Agreement
violate, in any way material to the transactions contemplated hereby, any
contract or agreement to which Public Company is a party or any governmental or
judicial order, judgment, decree, statute, law, rule or regulation applicable to
Public Company, and this Agreement and all documents and other instruments to be
executed and delivered by Public Company in connection herewith constitute the
legal, valid and binding obligations of Public Company.

     (B) Public Company is not a party to, or bound by, any unexpired,
undischarged or unsatisfied contract, agreement, indenture, mortgage, debenture,
note or other instrument under the terms of which performance by Public Company
according to the terms of this Agreement will be a default or an event of
acceleration, or grounds for termination, or whereby timely performance by
Public Company, according to the terms of this Agreement, may be prohibited,
prevented or delayed.

                                  ARTICLE VII

                   REPRESENTATIONS AND WARRANTIES OF INVESTOR
                   ------------------------------------------


     SECTION 7.1  GENERAL STATEMENT.  Investor hereby makes the representations
                  -----------------                                            
and warranties to each 3ECW Partner which are set forth in this Article VII.
                                                                -----------  
All representations and warranties set forth in Sections 7.3 and 7.4 shall
                                                ------------     ---      
survive the Closing (and none shall merge into any instrument of conveyance) for
the period of any relevant statute of limitations therefor.  Representations and
warranties of Investor are made as of the date of this Agreement.


     SECTION 7.2  ATTRIBUTION.  For purposes of the representations and
                  -----------                                          
warranties of Public Company set forth in this Article VII only, the words
"knowledge of Investor" or "Investor's knowledge" shall mean the actual and not
constructive knowledge of Mortimer Zuckerman, Edward Linde and Thomas O'Connor
(collectively, the "INVESTOR KNOWLEDGE PARTIES").  Any fact, matter or other
statement shall not be deemed to be within the knowledge of Investor or
Investor's knowledge unless the Investor Knowledge Parties, or any of them, have
actual knowledge of such fact, matter or other statement.  Notwithstanding the
foregoing, the representations and warranties made by Investor under Section 7.4
                                                                     -----------

                                      -18-

 
below are intended to be absolute in nature and are not limited by the knowledge
or attribution limitations of this Section 7.2.
                                   ----------- 


     SECTION 7.3  REPRESENTATIONS AND WARRANTIES RE: INVESTOR BUSINESS AND
                  --------------------------------------------------------
OPERATIONS.  Investor hereby represents and warrants as follows:
- ----------                                                      

               (A)  Investor is organized and, to Investor's knowledge, has
     conducted its business in accordance with all applicable laws, to the
     extent applicable, the failure or the violation of which would reasonably
     be expected to have a material adverse effect on the results of operations
     of Investor.

               (B)  There are no actions, suits or proceedings pending and, to
     Investor's knowledge, no such proceedings are threatened or contemplated by
     governmental authorities or by others, which would reasonably be expected
     to either (i) question the validity of this Agreement or the consummation
     of the transactions contemplated hereby or the issuance of the Investor
     Preferred Units contemplated hereby, any other agreements contemplated
     hereby or any actions taken pursuant to any of the foregoing or (ii) result
     in any material adverse change in the condition, financial or otherwise, or
     in the earnings, business affairs, management or business prospects of
     Investor.  As of the date hereof, there is no material action or suit
     against Investor pending or threatened by any Person.

               (C)  No proceeding or other action has been commenced or
     undertaken relating to the dissolution or merger of Investor (except in
     connection with an acquisition of property for Units in which Investor is
     the surviving party in the merger) and none is presently contemplated.

               (D)  Investor has duly and timely filed with the appropriate
     governmental authorities all Tax Returns required to be filed by it for all
     periods ending on or prior to the Closing Date, except to the extent of any
     Tax Return for which an extension of time for filing has been properly
     filed.  Each such Tax Return is true and correct in all material respects.
     All Taxes owed by Investor have been paid (whether or not shown on a Tax
     Return).  All Taxes which Investor is required by law to withhold or
     collect, including, without limitation, Taxes required to have been
     withheld in connection with amounts paid or owing to any employee,
     independent contractor, creditor, partner, or other third party and sales,
     gross receipts and use taxes, have been duly withheld or collected and, to
     the extent required, have been paid over to the proper governmental
     authorities or are held in separate bank accounts for such purpose.  There
     are no liens for Taxes upon the assets of Investor except for statutory
     liens for Taxes not yet due.

               (E)  Investor has not filed for an extension of a statute of
     limitations with respect to any Taxes and no governmental authorities have
     requested an extension of the statute of limitations with respect to any
     Taxes.  Investor is not a party to any pending action or any formal or
     informal proceeding by any taxing authority for a deficiency, assessment or
     collection of Taxes, and no claim of any deficiency, assessment or
     collection of Taxes has been asserted or, to the knowledge of Investor,
     threatened against 

                                      -19-

 
     it, including claims by any taxing authority in a jurisdiction where
     Investor does not file Tax Returns that it is or may be subject to taxation
     in that jurisdiction.

               (F)  Investor is not, and will not become, a "publicly traded
     partnership" within the meaning of Section 7704 of the Code.

               (G)  Investor does not hold "plan assets" within the meaning of
     29 C.F.R. Section 2510.3-101.


     SECTION 7.4  DUE FORMATION, ETC. OF INVESTOR.  Investor is a limited
                  -------------------------------                        
partnership duly formed and in good standing under the laws of the State of
Delaware, is (or prior to the Closing will be) duly qualified and in good
standing as a foreign limited partnership under the laws of the State of
California, and has all necessary power, partnership and otherwise, to execute
and deliver this Agreement and all other documents and instruments to be
executed and delivered by Investor in connection herewith and to perform all its
obligations hereunder and thereunder.  This Agreement has been duly authorized
by all requisite partnership action on the part of Investor.  The execution and
delivery of this Agreement and the other documents and instruments to be
executed and delivered by Investor in connection with the transactions described
herein, and the consummation of the transactions contemplated hereby and
thereby, do not require the consent or approval of the partners of Investor or,
to the knowledge of Investor, the consent or approval of any governmental
authority, nor, to the knowledge of Investor, does the execution and delivery of
this Agreement violate, in any way material to the transactions contemplated
hereby, any contract or agreement to which Investor is a party or any
governmental or judicial order, judgment, decree, statute, law, rule or
regulation applicable to Investor, and this Agreement and all documents and
other instruments to be executed and delivered by Investor in connection
herewith constitute the legal, valid and binding obligations of Investor.
Investor is not a party to, or bound by, any unexpired, undischarged or
unsatisfied contract, agreement, indenture, mortgage, debenture, note or other
instrument under the terms of which performance by Investor according to the
terms of this Agreement will be a default or an event of acceleration, or
grounds for termination, or whereby timely performance by Investor, according to
the terms of this Agreement, may be prohibited, prevented or delayed.


                                  ARTICLE VIII

                                  LIMITATIONS
                                  -----------

     SECTION 8.1  LIMITATIONS.  Except for the representations and warranties
                  -----------                                                
set forth in Section 4.3 above (which shall survive the Closing until a date
             -----------                                                    
(the "LIMITATION DATE") which is twelve (12) months after the Closing Date) all
representations and warranties shall survive the Closing without any time limit
other than those limits imposed by the applicable statute of limitations or
other similar laws.  Notwithstanding the foregoing, Investor and/or Public
Company shall have the right to commence or prosecute against the 3ECW Partners
any claim for the breach of a representation or warranty under Section 4.3
                                                               -----------
relating to events or occurrences which occurred prior to the Limitation Date,
provided such claim is actually filed no later than forty-five (45) days after
the Limitation Date, and otherwise no action based thereon shall be commenced
after the Closing Date.  The representations and warranties of the parties made
in 

                                      -20-

 
this Agreement are personal to the other parties hereto and no Person other
than a named party hereto shall be entitled to bring any action based thereon.
The representations and warranties set forth above are further subject to the
limitations of liability set forth in Section 11.1 hereof and Article 12 of the
                                      ------------                             
Transaction Agreement, which limitations are in addition to (and not in lieu of)
the limitations set forth in this Agreement.


                                   ARTICLE IX

                                   COVENANTS

     SECTION 9.1  CONFIDENTIALITY.
                  --------------- 

               (A)  As used herein, "CONFIDENTIAL MATERIAL" means, with respect
     to any party hereto (the "PROVIDING PARTY"), all information, whether oral,
     written or otherwise, furnished to another party hereto (the "RECEIVING
     PARTY") or the Receiving Party's directors, officers, partners, Affiliates,
     employees or agents, or their respective representatives (collectively,
     "REPRESENTATIVES"), by the Providing Party and all reports, analyses,
     compilations, studies and other material prepared by the Receiving Party or
     its Representatives (in whatever form maintained, whether documentary,
     computer storage or otherwise) containing, reflecting or based upon, in
     whole or in part, any such information.  The term "CONFIDENTIAL MATERIAL"
     does not include information which (i) is or becomes generally available to
     the public other than as a result of a disclosure by the Receiving Party,
     its Representatives or anyone to whom the Receiving Party or any of its
     Representatives transmit any Confidential Material in violation of this
     Agreement or (ii) is or becomes known or available to the Receiving Party
     on a nonconfidential basis from a source (other than the Providing Party or
     one of its Representatives) who is not, to the knowledge of the Receiving
     Party, prohibited from transmitting the information to the Receiving Party
     or its Representatives by a contractual, legal, fiduciary or other
     obligation.

               (B)  Subject to paragraph (c) below or except as required by
                               -------------                               
     applicable laws regulations or legal process as reasonably interpreted by
     Public Company, the Confidential Material will be kept confidential and
     will not, without the prior written consent of the Providing Party, be
     disclosed by the Receiving Party or its Representatives, in whole or in
     part, and will not be used by the Receiving Party or its Representatives,
     directly or indirectly, for any purpose other than in connection with this
     Agreement, the other Transaction Documents and the transactions
     contemplated hereby or thereby or evaluating, negotiating or advising with
     respect to such matters.  Notwithstanding anything to the contrary herein,
     the Receiving Party has the right to transmit Confidential Material to its
     Representatives only if and to the extent that such Representatives need to
     know the Confidential Material for purposes of such transactions and are
     informed by the Receiving Party of the confidential nature of the
     Confidential Material and of the terms of this Section 9.1(b).
                                                    --------------  
     Notwithstanding the foregoing, each of Public Company, Investor, and the
     3ECW Partners, shall have the right to disclose such Confidential Material
     to its actual or proposed financing and capital sources and their

                                      -21-

 
     respective representatives, provided that, prior to disclosing such
     information to such Persons, as the case may be, it advises such Persons of
     the confidential nature of such Confidential Information and causes to be
     affixed to such Confidential Information and requires that such Information
     be used only for the purposes specified by the parties hereto in connection
     with the transaction contemplated by this Agreement and/or the Transaction
     Agreement. In any event, the Receiving Party will be responsible for any
     actions by its Representatives (and any other Person to whom such
     Confidential Material is conveyed in accordance with the provisions hereof)
     which are not in accordance with the provisions hereof.

               (C)   In the event that the Receiving Party, its Representatives
     or anyone to whom the Receiving Party or its Representatives supply the
     Confidential Material are requested (by oral questions, interrogatories,
     requests for information or documents, subpoena, civil or criminal
     investigative demand, any informal or formal investigation by any
     government or governmental agency or authority or otherwise in connection
     with legal process) to disclose any Confidential Material, the Receiving
     Party agrees (i) to immediately notify the Providing Party of the
     existence, terms and circumstances surrounding such a request, (ii) to
     consult with the Providing Party on the advisability of taking legally
     available steps to resist or narrow such request, and (iii) if disclosure
     of such information is required, to furnish only that portion of the
     Confidential Material which, in the opinion of the Receiving Party's
     counsel, the Receiving Party is legally compelled to disclose and to
     cooperate with any action by the Providing Party to obtain an appropriate
     protective order or other reliable assurance that confidential treatment
     will be accorded the Confidential Material (it being agreed that the
     Providing Party shall reimburse the Receiving Party for all reasonable out-
     of-pocket expenses incurred by the Receiving Party in connection with such
     cooperation).

               (D)  In the event of the termination of this Agreement in
     accordance with its terms, promptly upon request from the Providing Party,
     the Receiving Party shall, except to the extent prohibited by applicable
     laws, regulations or legal process, redeliver to the Providing Party or
     destroy all tangible Confidential Material and will not retain any copies,
     extracts or other reproductions thereof in whole or in part.  Any such
     destruction shall be certified in writing to the Providing Party by an
     authorized officer of the Receiving Party supervising the same.


     SECTION 9.2  PUBLIC STATEMENTS.  Investor, Public Company and Rockmark
                  -----------------                                        
Corporation shall consult with each other prior to issuing any press release or
any written public statement with respect to this Agreement or the transactions
contemplated hereby and, except as shall be required by applicable law, none of
the parties hereto shall issue any such press release or written public
statement prior to review and approval by Investor, Public Company and Rockmark
Corporation, it being understood that such approval will not be unreasonably
withheld or delayed.


     SECTION 9.3  SURVIVAL.  The covenants in this Article IX shall survive the
                  --------                         ----------                  
Closing.

                                      -22-

 
                                   ARTICLE X

                                    CLOSING
                                    -------

     SECTION 10.1  CLOSING DELIVERIES.
                   ------------------ 

     (A)  Closing.  As used herein, the term "CLOSING" shall mean the
          -------                                                    
consummation of all transactions contemplated in this Agreement as provided in
                                                                              
subparagraphs (b) and (c) below, and the term "CLOSING DATE" shall mean the date
- -----------------     ---                                                       
upon which the Closing occurs.

     (B)  Closing Deliveries of the 3ECW Partners.  On the date hereof, the 3ECW
          ---------------------------------------                               
Partners are delivering to Investor and Public Company, or have caused to be
delivered to the Escrow Agent, the following:

               (i)   An executed Tax Reporting Agreement substantially in the
     form attached hereto as Exhibit E;
                             --------- 

               (ii)  A Foreign Investment in Real Property Tax Act affidavit
     executed by each 3ECW Partner (it being understood that if any 3ECW Partner
     shall fail to provide the necessary affidavit and/or documentation, Public
     Company may proceed with withholding provision as provided by law);

               (iii) Assignments to Investor of each 3ECW Partner's interest in
     3ECW in the form annexed hereto as Exhibit F executed by each such 3ECW
                                        ---------                           
     Partner;

               (iv)  Evidence of the organization (if other than an individual),
     existence (if other than an individual) and authority of each 3ECW Partner
     to enter into this Agreement and to consummate the transactions
     contemplated hereby, certified by an appropriate officer or partners (if
     other than an individual) (together with an incumbency and signature
     certificate regarding the Person signing);

               (v)   The Investor Agreement executed by each 3ECW Partner;

               (vi)  The Registration Rights Agreement executed by each 3ECW
     Partner;

               (vii) Additional documents, to the extent consistent with the
     provisions of this Agreement, that Investor, Public Company or the Title
     Company may reasonably request for the consummation of the transactions
     contemplated by this Agreement.

               (viii) a Representation Letter in the form attached hereto as
     Schedule 10.1(b)(ix) executed by each 3ECW Partner (of his or her duly
     authorized attorney-in-fact as evidenced by a copy of the relevant power of
     attorney attached thereto) indicating thereon that such 3ECW Partner is an
     "accredited investor."

                                      -23-

 
     (C)  Closing Deliveries of Investor and/or Public Company.  On the date
          ----------------------------------------------------              
hereof, Investor and/or Public Company are delivering to the 3ECW Partners, or
have caused to be delivered to the Escrow Agent, the following:

               (i)   Evidence of the organization, existence and authority of
     Public Company and Investor to enter into this Agreement and to consummate
     the transactions contemplated hereby, certified by an appropriate officer
     of Public Company or Investor, as appropriate (together with an incumbency
     and signature certificate regarding the officer(s) signing on their
     behalf);

               (ii)  The Registration Rights Agreement executed by Public
     Company;

               (iii) The Investor Agreement executed by Public Company and any
     other partner whose execution is required by Investor's Investor Agreement,
     reflecting the issuance to the 3ECW Partners of the Investor Preferred
     Units in accordance with Section 2.1;
                              ----------- 

               (iv)  An executed Tax Reporting Agreement substantially in the
     form attached hereto as Exhibit E; and
                             ---------     

               (v)   Public Company and Investor shall deliver any additional
     documents, to the extent consistent with the provisions of this Agreement,
     that the other parties or the Title Company may reasonably request for the
     consummation of the transactions contemplated by this Agreement.

               (vi)  Public Company shall deliver evidence reasonably
     satisfactory to Rockmark Corporation that Richard E. Salomon has been duly
     elected or appointed as a member of Public Company's Board of Directors.

     (D)  Waiver of Failure of Conditions Precedent.  By closing the 
          ----------------------------------------- 
transactions contemplated by this Agreement, each party hereto shall be
conclusively deemed to have waived the benefit of any remaining unfulfilled
conditions precedent set forth in this Agreement and the Transaction Agreement.


     SECTION 10.2  3ECW CONTRIBUTION VALUE; ALLOCATIONS.  Investor, Public
                   ------------------------------------                   
Company and the 3ECW Partners each hereby agree that the aggregate value (the
"3ECW CONTRIBUTION VALUE") to be paid by Investor for the Property shall equal
(i) an amount equal to  $142.047 million (Gross Market Value of Three ECW),
minus the Three ECW Existing Debt Balance subject to adjustment pursuant to
Section 10.3 below, multiplied by (ii) 37.9167% ( the 3ECW Partners' aggregate
                    ---------- --                                             
percentage interest in 3ECW) (the"3ECW VALUE"),.


     SECTION 10.3  APPORTIONMENT CREDIT.  The 3ECW Contribution Value shall be
                   --------------------                                       
adjusted to reflect the prorations and other adjustments pursuant to and as
provided in Exhibit V of the Transaction Agreement.

                                      -24-

 
     SECTION 10.4  DELAYED ADJUSTMENT.  Investor and Rockmark Corporation,
                   ------------------                                     
acting on behalf of the 3ECW Partners, shall administer the provisions of
Exhibit V of the Transaction Agreement following the Closing based on the
closing of 3ECW books for the month in which the Closing Date occurs. If, as a
result of the Final Audit to be conducted pursuant to Exhibit V, the amount of
an item listed in Exhibit V of the Transaction Agreement shall prove to be
incorrect (whether as a result of an error in calculation or a lack of complete
and accurate information as of the Closing), Investor and the 3ECW Partners
shall adjust the Investor Preferred Units initially issued (proportionately to
the Investor Preferred Units initially issued) by Investor delivering an amended
schedule to the Investor Agreement as reasonably agreed to by Rockmark
Corporation reflecting the corrected number of Investor Preferred Units issued
to each 3ECW Partners in order to correct such error upon receipt of reasonable
proof of such error, provided that such proof is delivered to the party from
whom payment is requested as provided in Exhibit V. The correction of any such
error shall be made effective as of  the Closing Date and shall include the
further payment by Investor, or repayment by the 3ECW Partners, of any
distributions made by Investor in respect of the increase, or decrease, of the
number of Investor Preferred Units initially held by any 3ECW Partners prior to
such adjustment.


     SECTION 10.5  SURVIVABILITY.  The provisions of this Article 10 shall
                   -------------                          ----------      
survive the Closing and not be merged therein for a period of six months after
the closing or such longer period as may be necessary to complete to the Final
Audit and make the adjustment described in Section 10.4.


     SECTION 10.6  CLOSING COSTS.  The parties shall bear certain closing costs
                   -------------                                               
of the transaction contemplated hereby as set forth in Section 10.3 and Exhibit
V of the Transaction Agreement.  Any other Closing costs not covered herein or
in Section 10.3 of the Transaction Agreement or Exhibit V of the Transaction
   ------------                                 ---------                   
Agreement shall be allocated between the parties in accordance with the local
practice and custom in San Francisco, California.


                                   ARTICLE XI

                       BREACH, DEFAULT, LIABILITY LIMITS
                       ---------------------------------


     11.1  RIGHTS OF INVESTOR AND PUBLIC COMPANY.
           ------------------------------------- 

               (A)  In the event of any claim, suit or other action against any
     of the 3ECW Partners pertaining to (a) this Agreement, any of the documents
     executed in connection herewith or any of the transactions contemplated
     hereby or thereby (including, without limitation, any and all
     indemnification obligations of any of  the  3ECW Partners hereunder or
     thereunder) or (b) a breach by  any of the 3ECW Partners of any of the
     terms or provisions of this Agreement or of any of the documents executed
     by the 3ECW Partners in connection with the matters contemplated in this
     Agreement (including, without limitation, the breach of any representation
     or warranty of the 3ECW Partners set forth herein or therein), Investor's
     and Public Company's sole remedy shall be an action for monetary damages;
                                                                              
     provided that, except for the breach of the representations and warranties
     -------- ----                                                             
     set forth in Sections 4.3(a), (b) and (c), Section 4.5, and Sections 5.3
                  ------------------------------------------     ------------
     and Section 5.4 above (which will not be subject to any limitation on the
     ---------------                                                          
     amount of such 

                                      -25-

 
     liability), and notwithstanding any provision to the contrary contained in
     this Agreement, the Transaction Agreement or in any other documents
     executed in connection herewith or therewith, (i) the maximum aggregate
     liability of the 3ECW Partners, and the maximum aggregate amount which may
     be awarded to and collected by Investor and Public Company or any other
     Person, with respect to any claim, suit or other action relating to a
     breach of a representation, covenant or indemnity of this Agreement, the
     Transaction Agreement or any other documents executed in connection
     herewith or therewith shall not exceed an amount equal to five percent (5%)
     of the 3ECW Contribution Value, and the liability of any 3ECW Partners
     shall not exceed an amount equal to (x) the 3ECW Partners' percentage
     interest in 3ECW immediately prior to the Closing, multiplied by
                                                        ---------- --
     (y) five percent (5%) of the 3ECW Contribution Value, and (ii) the maximum
     aggregate amount which may be awarded to and collected by Investor and
     Public Company with respect to any claim, suit or other action against any
     3ECW Partners relating to 3ECW or their respective buildings shall not
     exceed an amount (each a "BUILDING MAXIMUM LIABILITY AMOUNT") equal to five
     percent (5%) of the 3ECW Contribution Value and with respect to any claim,
     suit or action relating to any such Building, the liability of any 3ECW
     Partners shall not exceed an amount equal to (x) the 3ECW Partners'
     percentage interest in 3ECW immediately prior to the Closing, multiplied by
                                                                   ---------- --
     (y) the Building Maximum Liability Amount for such breach.  Notwithstanding
     the foregoing, the terms and provisions of this Section 11.1(a) are further
                                                     ---------------            
     subject to the overall $43,000,000 limitation of liability set forth in
                                                                            
     Section 12.1.2 of the Transaction Agreement, it being acknowledged and
     --------------                                                        
     agreed that the maximum liability caps described hereinabove may be further
     reduced as a result of recoveries made by Investor, Public Company or their
     Affiliates in connection with the other transactions described in the
     Transaction Agreement in accordance with said Section 12.1.2 of the
                                                   --------------       
     Transaction Agreement.  Notwithstanding the foregoing, the parties hereto
     hereby acknowledge and agree that the foregoing limitations on the amount
     of  liability (and any other cap on the liability of the Ventures or the
     Transferor Parties set forth in any other Transaction Document) does not
     apply to the breach of any of the representations and warranties set forth
     in Section 4.3 (a), (b) or (c), Section 4.5, Section 5.3 or Section 5.4
        ----------------------------------------- --------------------------
     hereof and any amount received with respect thereto shall not have the
     affect of reducing the maximum amount recoverable for other breaches which
     are subject to the limitations on the amount of liability under Section
     11.1(a) hereof or Section 12.1.2 of the Transaction Agreement and that any
     monetary damages recoverable from an 3ECW Partners shall be recovered only
     from the particular 3ECW Partners solely responsible therefor in the case
     of a breach of a representation in Section 5.3 or 5.4 or from the 3ECW
                                        -----------------                  
     Partners severally, and not jointly, in the case of a breach of a
     representation in Section 4.3 (a), (b), or (c) in the ratio of each such
     partner's percentage interest in and to 3ECW immediately prior to the
     Closing .The terms and provisions of this Section 11.1 shall survive the
                                               ------------                  
     Closing and shall not be merged therein.

               (B)  Except as provided in the last sentence of paragraph (b),
     Investor's and Public Company's sole recourse against  the 3ECW Partners,
     individually and/or as a group, for liability assumed by, and for any
     indemnity of or breach of representation or warranty made by any of the
     3ECW Partners shall be limited to the recovery by Investor 

                                      -26-

 
     and/or Public Company of Investor Preferred Units (and any Securities
     received in exchange therefor or upon conversion thereof) issued to such
     3ECW Partners (severally in the ratio of each such 3ECW Partner's
     proportionate partnership interest in 3ECW on the Closing as provided in
     paragraph (b) above), and none of the 3ECW Partners shall have any personal
     -------------
     liability to pay any damages or other amounts in cash in respect thereof,
     except to the extent that any 3ECW Partners holds an insufficient amount of
     Investor Preferred Units and Securities to satisfy the claim or judgment,
     in which event such Person shall be obligated to pay any damages or other
     amounts not satisfied by the transfer of Investor Preferred Units or
     Securities in cash. The number of Investor Preferred Units or Shares
     recoverable from any 3ECW Partners in respect of any claim (or damages) to
     be satisfied by such Person as provided in this Agreement shall be
     determined on a full diluted basis as if converted by reference to the
     closing trading price of the Public Company's common shares on the date of
     payment of the damages or other amounts. Notwithstanding Section 11.1(a)
     and the foregoing provisions of this paragraph (b), each of the 3ECW
     Partners shall be singly, and not jointly, liable without limitation by
     recourse to his or its units or otherwise for a breach of his or its
     representation in Sections 5.3 or 5.4
                       -------------------

               (C)  Investor shall promptly give Rockmark Corporation, as
     representative of the 3ECW Partners,  notice of any claim made by any
     third party which would reasonably be expected to result in liability of
     the 3ECW Partners in respect of a breach of a representation made by them
     in this Agreement or otherwise and shall give the 3ECW Partners, acting
     through Rockmark Corporation as their attorney in fact, the opportunity to
     cure any alleged claim and to defend against and settle all such claims at
     their sole cost.  The failure to give such notice, however, shall not
     relieve any 3ECW Partners of any liabilities hereunder to the extent that
     it is not materially prejudiced as a result thereof.


     11.2  RIGHTS OF 3ECW PARTNERS.  In the event of a breach by Investor or
           -----------------------                                          
Public Company of any of the terms or provisions of this Agreement or any of the
documents executed in connection herewith, the 3ECW Partners shall be entitled
to pursue any and all rights and remedies at law or in equity available to such
3ECW Partners with respect to such breach; provided that, except for breaches of
the representations and warranties set forth in Articles VI and VII (which will
not be subject to any liability cap), and except as otherwise expressly provided
in any other Transaction Document, the maximum aggregate liability of Investor
and Public Company for any and all breaches of the representations and
warranties of Investor and/or Public Company contained in any Transaction
Document shall not exceed an amount equal to Forty-Three Million Dollars
($43,000,000) in the aggregate.  The foregoing contractual limitation shall not
constitute a waiver or release by the 3ECW Partners of their rights under
Federal Securities Laws.  The terms and provisions of this Section 11.2 shall
                                                           ------------      
survive the Closing and shall not be merged therein.

                                      -27-

 
                                  ARTICLE XII

                                 MISCELLANEOUS
                                 -------------

     SECTION 12.1  EXPENSES.  Except as expressly set forth herein or in the
                   --------                                                 
Transaction Agreement, each party hereto shall bear its own costs and expenses
with respect to the transactions contemplated hereby.

     SECTION 12.2  AMENDMENT.  This Agreement may be amended, modified or
                   ---------                                             
supplemented but only in writing signed by each of the parties hereto.

     SECTION 12.3.  NOTICES.  Any notice, request, instruction or other document
                    -------                                                     
to be given hereunder by a party hereto shall be in writing and shall be deemed
to have been given, (a) when received if given in person or by courier or a
courier service, (b) on the date of transmission if sent by telex, facsimile or
other wire transmission or (c) three Business Days after being deposited in the
U.S. mail, certified or registered mail, postage prepaid:

               (A)  If to Public Company or Investor, addressed as follows:

 
                    Boston Properties, Inc.
                    8 Arlington Street
                    Boston, Massachusetts 02116-3495

                    Attention:  General Counsel
                    Facsimile:  617-421-1555
                    Telephone:  617-859-2600

                    with a copy to

                    Goulston & Storrs, P.C.
                    400 Atlantic Avenue
                    Boston, Massachusetts 02110-3333

                    Attention:  Eli Rubenstein, Esq.
                    Facsimile:  617-574-4112
                    Telephone:  617-482-1776

               (B)  If to 3ECW or the 3ECW Partners, addressed as follows:

                    Fedmark Corporation
                    30 Rockefeller Plaza, Room 5600
                    New York, New York 10112

                    Attention:  Richard E. Salomon
                    Telephone: (212) 903-1204
                    Facsimile:  (212) 424-1806

                                      -28-

 
                    with a copy to:

                    Willkie Farr & Gallagher
                    787 Seventh Avenue
                    New York, New York 10019-6099

                    Attention:  Bruce M. Montgomerie
                    Telephone: (212) 728-8248
                    Facsimile:  (212) 728-8111


or to such other individual or address as a party hereto may designate for
itself by notice given as herein provided.

     SECTION 12.4  WAIVERS.  The failure of a party hereto at any time or times
                   -------                                                     
to require performance of any provision hereof shall in no manner affect its
right at a later time to enforce the same.  No waiver by a party of any
condition or of any breach of any term, covenant, representation or warranty
contained in this Agreement shall be effective unless in writing, and no waiver
in any one or more instances shall be deemed to be a further or continuing
waiver of any such condition or breach in other instances or a waiver of any
other condition or breach of any other term, covenant, representation or
warranty.


     SECTION 12.5  COUNTERPARTS.  This Agreement may be executed in
                   ------------                                    
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.


     SECTION 12.6  INTERPRETATION.  The headings preceding the text of Articles
                   --------------                                              
and Sections included in this Agreement and the headings to Exhibits and
Schedules attached to this Agreement are for convenience only and shall not be
deemed part of this Agreement or be given any effect in interpreting this
Agreement. The use of the masculine, feminine or neuter gender herein shall not
limit any provision of this Agreement. The use of the term  "including" or
"include" shall in all cases herein mean "including, without limitation" or
"include, without limitation," respectively.  Underscored references to
Articles, Sections, Subsections, Exhibits or Schedules shall refer to those
portions of this Agreement.


     SECTION 12.7  GOVERNING LAW.  THIS AGREEMENT SHALL BE  GOVERNED BY AND
                   -------------                                           
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF CALIFORNIA.


     SECTION 12.8  ASSIGNMENT.  This Agreement shall be binding upon and inure
                   ----------                                                 
to the benefit of the parties hereto and their respective successors and
assigns. No assignment of any rights or obligations shall be made by any party
without the written consent of each other party.


     SECTION 12.9  NO THIRD PARTY BENEFICIARIES.  This Agreement is solely for
                   ----------------------------                               
the benefit of the parties hereto and, to the extent provided herein, their
respective Representatives, and no provision of this Agreement shall be deemed
to confer upon other third parties any remedy, claim, liability, reimbursement,
cause of action or other right.

                                      -29-

 
     SECTION 12.10 FURTHER ASSURANCES.  Upon reasonable request of any party,
                   ------------------                                        
each other party will execute and deliver such other documents, releases,
assignments and other instruments as may be required to effectuate completely
the transfer and assignment to Investor of the Property and to issue the
Investor Preferred Units and the Shares and to otherwise carry out the purposes
of this Agreement.


     SECTION 12.11 SEVERABILITY.  If any provision of this Agreement shall be
                   ------------                                              
held invalid, illegal or unenforceable, the validity, legality or enforceability
of the other provisions hereof shall not be affected thereby, and there shall be
deemed substituted for the provision at issue a valid, legal and enforceable
provision as similar as possible to the provision at issue.


     SECTION 12.12 REMEDIES CUMULATIVE.  The remedies provided in this Agreement
                   -------------------                                          
shall be cumulative and shall not preclude the assertion or exercise of any
other rights or remedies available by law, in equity or otherwise.


     SECTION 12.13. ENTIRE UNDERSTANDING.  This Agreement, together with the
                    --------------------                                    
other Transaction Documents, sets forth the entire agreement and understanding
of the parties hereto with respect to the matters set forth herein and
supersedes any and all prior agreements, arrangements and understandings among
the parties.


     SECTION 12.14  CONSENT TO JURISDICTION AND SERVICE OF PROCESS.  ALL
                    ----------------------------------------------      
JUDICIAL PROCEEDINGS BROUGHT AGAINST ANY PERSON ARISING OUT OF OR RELATING TO
THIS AGREEMENT MAY BE BROUGHT IN ANY STATE OR FEDERAL COURT OF COMPETENT
JURISDICTION IN THE STATE OF CALIFORNIA, AND BY EXECUTION AND DELIVERY OF THIS
AGREEMENT EACH PARTY HERETO ACCEPTS FOR ITSELF, GENERALLY AND UNCONDITIONALLY,
THE NONEXCLUSIVE JURISDICTION OF THE AFORESAID COURTS AND WAIVES ANY DEFENSE OF
FORUM NON CONVENIENS AND IRREVOCABLY AGREES TO BE BOUND BY ANY JUDGMENT RENDERED
THEREBY IN CONNECTION WITH THIS AGREEMENT.  Each party hereby agrees that
service of all process in any such proceeding in any such court may be made by
registered or certified mail, return receipt requested, to any other party
hereto, at its address provided in this Agreement, such service being hereby
acknowledged by each party to be sufficient for personal jurisdiction in any
action against such party in any such court and to be otherwise effective and
binding service in every respect.  Nothing herein shall affect the right to
serve process in any other manner permitted by law.


     SECTION 12.15  WAIVER OF JURY TRIAL.  EACH OF THE PARTIES TO THIS AGREEMENT
                    --------------------                                        
HEREBY AGREES TO WAIVE ITS RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR
CAUSE OF ACTION BASED UPON OR ARISING OUT OF THIS AGREEMENT OR ANY DEALINGS
BETWEEN THEM RELATING TO THE SUBJECT MATTER OF THIS AGREEMENT.  The scope of
this waiver is intended to be all-encompassing of any and all disputes that may
be filed in any court and that relate to the subject matter of this transaction,
including, without limitation, contract claims, tort claims, breach of duty
claims and all other common law and statutory claims.  Each party hereto
acknowledges that this waiver is a material inducement to enter into a business
relationship, that each has 

                                      -30-

 
already relied on this waiver in entering into this Agreement, and that each
shall continue to rely on this waiver in their related future dealings. Each
party hereto further warrants and represents that it has reviewed this waiver
with its legal counsel and that it knowingly and voluntarily waives its jury
trial rights following consultation with such legal counsel. THIS WAIVER IS
IRREVOCABLE, MEANING THAT IT MAY NOT BE MODIFIED EITHER ORALLY OR IN WRITING,
AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS
OR MODIFICATIONS TO THIS AGREEMENT. In the event of litigation, this Agreement
may be filed as a written consent to a trial by the court.

                                      -31-

 
  IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed and delivered as of the date first above written.

                              BOSTON PROPERTIES, INC.,
                              a Delaware corporation

                              By: /s/ Thomas J. O'Connor
                                 -------------------------------------
                              Name:  Thomas J. O'Connor
                              Title: Vice President


                              BOSTON PROPERTIES LIMITED PARTNERSHIP,
                              a Delaware limited partnership

                              By:  BOSTON PROPERTIES, INC.,
                                   a Delaware corporation,
                                   its general partner
  
                              By: /s/ Thomas J. O'Connor
                                 -------------------------------------

                              By: /s/ William S. Wedge
                                 -------------------------------------
                              Name:  William S. Wedge
                              Title: Senior Vice President


                              THREE EMBARCADERO CENTER WEST

                              By:  FEDMARK CORPORATION,
                                    its General Partner

                              By:  /s/ Richard E. Salomon               
                                  -------------------------------------  
                              Name:  Richard E. Salomon
                              Title: President

                              FEDMARK CORPORATION

                              By:  /s/ Richard E. Salomon               
                                  -------------------------------------  
                              Name:  Richard E. Salomon               
                              Title: President                         

                                      -32-

 
                              ECW INVESTOR ASSOCIATES

                              By:  Rockmark Corporation, attorney-in-fact

 
                              By:  /s/ Richard E. Salomon              
                                  -------------------------------------
                              Name:  Richard E. Salomon               
                              Title: President                         


                              EC HOLIDNGS, INC.

                              By:  /s/ [Signature Illegible]
                                  -------------------------------------
                              Name:  Richard E. Salomon               
                              Title: President                         

                              REALROCK I

                              By:  Rockmark Corporation, attorney-in-fact

 
                              By:  /s/ Richard E. Salomon              
                                  -------------------------------------
                              Name:  Richard E. Salomon               
                              Title: President

                              David Rockefeller

                              By:  Rockmark Corporation, attorney-in-fact

 
                              By:  /s/ Richard E. Salomon              
                                  -------------------------------------
                              Name:  Richard E. Salomon               


                              Title: President

                              DR. & DESCENDANTS PARTNERSHIP

                              By:  Rockmark Corporation, attorney-in-fact

 
                              By:  /s/ Richard E. Salomon              
                                  -------------------------------------
                              Name:  Richard E. Salomon               
                              Title: President                         

                                      -33-

 
                              One Embarcadero Center Venture

                              By:  PIC REALTY CORPORATION,
                                   a Delaware corporation


                                    By:   /s/ Gary L. Frazier
                                          -----------------------------------
                                    Name: 
                                          -----------------------------------
                                    Title: 
                                          -----------------------------------

                                    EMBARCADERO CENTER INVESTORS PARTNERSHIP,
                                    a California limited partnership


                              By:  ROCKMARK CORPORATION,
                                   a Delaware corporation,
                                   its Managing General Partner

                                    By:   /s/ Richard E. Salomon
                                          -----------------------------------
                                          Name:   Richard E. Salomon
                                          Title:  President


                              Three Embarcadero Center Venture


                              By:  THE PRUDENTIAL INSURANCE

                                    COMPANY OF AMERICA,
                                    a New Jersey corporation


                                    By:   /s/ Gary L. Frazier
                                          -----------------------------------
                                    Name:  
                                          -----------------------------------
                                    Title: 
                                          -----------------------------------

                                      -34-

 
                             EMBARCADERO CENTER INVESTORS PARTNERSHIP,
                             a California limited partnership
                            
                            
                             By:  ROCKMARK CORPORATION,
                                  a Delaware corporation,
                                  its Managing General Partner
                            
                            
                                  By: /s/ Richard E. Salomon
                                     ----------------------------------
                                  Name:  Richard E. Salomon
                                  Title:  President
                            
                            
                            
                             Four Embarcadero Center Venture
                            
                            
                             By:  THE PRUDENTIAL INSURANCE COMPANY OF AMERICA,
                                  a New Jersey corporation
                            
                             By:   /s/ Gary L. Frazier  
                                   ----------------------------------
                             Name:  
                                   ----------------------------------
                             Title: 
                                   ----------------------------------
                            
                            
                             EMBARCADERO CENTER INVESTORS PARTNERSHIP,
                             a California limited partnership
                            
                             By:  ROCKMARK CORPORATION,
                                  a Delaware corporation,
                                  its Managing General Partner
                            
                            
                            
                             By:   /s/ Richard E. Salomon
                                   ----------------------------------
                                   Name:  Richard E. Salomon
                                   Title: President
                                        

                                      -35-

 
                                    ECW CLAYMARK INVESTORS

                                    By:  Rockmark Corporation, attorney-in-fact

 
                                    Name:  Richard E. Salomon     
                                    Title:    President           
                                                            
                                    WR TRUST                      
                                                            
                                    By:  Rockmark Corporation, attorney-in-fact
                                                            
                                                            
                                    Name:  Richard E. Salomon     
                                    Title:    President           
                                                            
                                    PORTMAN FAMILY TRUST          
                                                            
                                    By: /s/ John C. Portman III     
                                        ---------------------------- 
                                    Name:                         
                                    Title:                         

                                    By: /s/ John C. Portman, Jr.
                                        ---------------------------- 

                                    By: /s/ Joan N. Portman
                                        ---------------------------- 

                                      -36-

 
                                                                    EXHIBIT 99.4
 
                        THREE ECW REDEMPTION AGREEMENT


          THIS THREE ECW REDEMPTION AGREEMENT (this "AGREEMENT") is made and
entered into as of this 12th day of November, 1998, by and among THREE
EMBARCADERO CENTER WEST, a California limited partnership (the "PARTNERSHIP"),
BOSTON PROPERTIES LIMITED PARTNERSHIP, a Delaware limited partnership
("INVESTOR"), BP EC WEST LLC, a Delaware limited liability company ("BPECW
LLC"), THE PRUDENTIAL INSURANCE COMPANY OF AMERICA, a New Jersey corporation
("PRUDENTIAL"), PIC REALTY CORPORATION, a Delaware corporation ("PIC"), and
PRUDENTIAL REALTY SECURITIES II, INC., a Delaware corporation ("PRS").
Prudential, PIC and PRS shall sometimes hereinafter be collectively referred to
as the "PRUDENTIAL PARTNERS".


                                R E C I T A L S
                                - - - - - - - -

          A.   Pursuant to that certain Master Transaction Agreement dated as of
September 28, 1998, by and among Investor, Boston Properties, Inc., Prudential,
PIC, Fedmark Corporation, Embarcadero Center Investors Partnership, Pacific
Property Services, L.P. and those Persons listed on Exhibit A-1 attached thereto
(the "MASTER TRANSACTION AGREEMENT"), and immediately prior to the execution of
this Agreement, the ECW Rockefeller Parties contributed their respective
partnership interests in and to the Partnership to BPECW LLC, as Investor's
designee for receiving title to the interests of the Rockefeller Parties, in
exchange for OP Units, such ECW Rockefeller Parties withdrew as partners from
the Partnership, and BPECW LLC was admitted as a general and limited partner of
the Partnership.  All initially capitalized terms used herein without definition
shall have the respective meanings given such terms in the Master Transaction
Agreement.

          B.   Pursuant to the Master Transaction Agreement, and immediately
prior to the execution of this Agreement, Prudential transferred a 1% limited
partnership interest in and to the Partnership to PIC and a 1% limited
partnership interest in and to the Partnership to PRS, and PIC and PRS were each
admitted as partners of the Partnership.  BPECW LLC, Prudential, PIC and PRS
shall sometimes hereinafter be collectively referred to as the "EXISTING
PARTNERS". The respective percentage interests of each of the Existing Partners
is set forth on Schedule A attached hereto.
                ----------                 

          C.   The Partnership is currently governed by those certain Second
Amended and Restated Articles of Limited Partnership of Three Embarcadero Center
West dated as of January 9, 1989, by and among Fedmark, Prudential and those
parties listed on Exhibit A thereto (as amended, modified or supplemented, the
"PARTNERSHIP AGREEMENT").

          D.   The Existing Partners desire to enter into this Agreement whereby
BPECW LLC's entire 1% general partnership interest and 36.9167% limited
partnership interest in and to 

                                       1

 
the Partnership (including all right, title and interest of BPECW LLC in and to
the Partnership to the extent relating to such percentage interests)
(collectively, the "BPECW LLC INTEREST") will be redeemed by the Partnership in
exchange for an undivided 37.9167% tenancy-in-common interest in and to the
Property (defined below) on the terms and conditions of this Agreement.

          NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto hereby agree as
follows:


                                   ARTICLE 1

                              CERTAIN DEFINITIONS
                              -------------------

      1.1  Definitions.  In addition to the terms defined in the Master
           -----------                                                 
Transaction Agreement and in this Agreement below, the following terms shall
have the meanings set forth below for the purposes of the transactions described
in this Agreement:

           "ASSIGNED CONTRACTS" shall have the meaning given such term in
Section 7.1.2(d) hereof.
- ----------------        

           "ASSIGNMENT OF CONTRACTS" shall have the meaning given such term in
Section 7.1.2(d) hereof.
- ----------------        

           "ASSIGNMENT OF LEASES" shall have the meaning given such term in
Section 7.1.2(c) hereof.
- ----------------        

           "BPECW LLC" shall have the meaning given such term in the
Introductory Paragraph.

           "BPECW LLC INTEREST" shall have the meaning given such term in
Recital D hereof.
- ---------        

           "DEED" shall have the meaning given such term in Section 7.1.2(a)
                                                            ----------------
hereof.

           "EXISTING PARTNERS" shall have the meaning given such term in Recital
                                                                         -------
B hereof.
- -        

           "INVESTOR" shall have the meaning given such term in the Introductory
Paragraph.

           "LEASES" shall have the meaning given such term in Section 7.1.2(c)
                                                              ----------------
hereof.

           "MASTER TRANSACTION AGREEMENT" shall have the meaning given such term
in Recital A hereof.
   ---------        

                                       2

 
           "OTHER PROPERTY RIGHTS" shall have the meaning given such term in
Section 2.1.1(c) hereof.
- ----------------        

           "PARTNERSHIP" shall have the meaning given such term in the
Introductory Paragraph.

           "PARTNERSHIP AGREEMENT" shall have the meaning given such term in
Recital C hereof.
- ---------        

           "PERSONAL PROPERTY" shall have the meaning given such term in Section
                                                                         -------
2.1.1(b) hereof.
- --------        

           "PROPERTY" shall have the meaning given such term in Section 2.1.1
                                                                -------------
hereof.

           "PRUDENTIAL" shall have the meaning given such term in the
Introductory Paragraph.

           "PRUDENTIAL PARTNERS" shall have the meaning given such term in the
Introductory Paragraph.

           "PIC" shall have the meaning given such term in the Introductory
Paragraph.

           "PRS" shall have the meaning given such term in the Introductory
Paragraph.

           "REAL PROPERTY" shall have the meaning given such term in Section
                                                                     -------
2.1.1(a) hereof.
- --------        

           "REDEMPTION DATE" shall have the meaning given such term in Section
                                                                       -------
7.1.1 hereof.
- -----        

                                   ARTICLE 2

                                  REDEMPTION
                                  ----------

      2.1 Redemption.  On the date hereof and concurrently herewith, the
          ----------                                                    
Partnership is fully redeeming the BPECW LLC Interest as set forth below.

          2.1.1  Transfer of 37.9167% Percentage Interest in Property.  The
                 ----------------------------------------------------      
Partnership and the Existing Partners each hereby agrees that, on the date
hereof and concurrently herewith the Partnership is distributing, transferring
and assigning to BPECW LLC, and BPECW LLC is accepting and assuming from the
Partnership, in full redemption of the BPECW LLC Interest, an undivided 37.9167%
tenancy-in-common interest in and to the Partnership's right, title and
interest, if any, in and to the following (collectively, the "PROPERTY"):

                                       3

 
          (a) Real Property.  That certain real estate located at 275 Battery
              -------------                                                  
     Street, City of San Francisco, County of San Francisco, State of
     California, legally described on Exhibit A attached hereto and incorporated
                                      ---------                                 
     herein by this reference, together with all buildings, improvements and
     fixtures located thereon and all rights, privileges and appurtenances
     pertaining thereto, including all of the Partnership's right, title and
     interest in and to all rights-of-way, open or proposed streets, alleys,
     easements, strips or gores of land adjacent thereto (herein collectively
     called the "REAL PROPERTY"); and

          (b) Personal Property.  All tangible and intangible personal property
              -----------------                                                
     of the Partnership (excluding any computer or computer equipment and
     software owned by the Partnership or PPS), located on the Real Property,
     and used in the ownership, operation and maintenance of the Real Property,
     and all books, records and files (excluding appraisals, budgets, the
     Partnership's strategic plans for the Property, marketing information,
     submissions relating to the Partnership's obtaining of corporate
     authorization, or other information in the possession or control of the
     Partnership or PPS which is privileged (provided that inadvertent
     disclosure shall not constitute a waiver of any privilege)) relating to the
     Real Property (herein collectively called the "PERSONAL PROPERTY"); and

          (c) Other Property Rights.  (i) The Partnership's interest as
              ---------------------                                    
     "landlord" in all Leases; and (ii) if and to the extent assignable by the
     Partnership, (A) all service, supply, maintenance and utility agreements,
     all equipment leases and all other agreements relating to the Property that
     are described on Exhibit B attached hereto and incorporated herein by this
                      ---------                                                
     reference, (B) all licenses, permits and other written authorizations
     necessary for the use, operation or ownership of the Real Property or
     Personal Property and in the Partnership's possession or control, and (C)
     the Partnership's interest, if any, in and to the name "Embarcadero Center
     West" or any similar name of the Building (the rights of the Partnership
     described in clauses (i) and (ii) hereinabove being herein collectively
                  -----------     ----                                      
     called the "OTHER PROPERTY RIGHTS").

          2.1.2  Adjustment of Percentage Interests.  Immediately upon the
                 ----------------------------------                       
consummation of the transactions described in this Sections 2.1 above, by
                                                   ------------          
operation of law and the terms of the Partnership Agreement, the percentage
interests of the Prudential Partners in the Partnership shall be increased, pro
                                                                            ---
rata in accordance with the percentage interest of each Prudential Partner prior
- ----                                                                            
to such increase, such that the aggregate percentage interests of the remaining
partners is 100%.

     2.2  Consent of Existing Partners.  All Existing Partners hereby consent to
          ----------------------------                                          
the full redemption of the BPECW LLC Interest as provided in this Article 2
                                                                  ---------
above.

                                       4

 
                                   ARTICLE 3

                                 TITLE MATTERS
                                 -------------

      3.1 Title to Real Property.  The Partnership is hereby distributing, and
          ----------------------                                              
BPECW LLC is hereby accepting, such 37.9167% tenancy-in-common interest in and
to the Real Property, subject only to: (a) such matters as are visible or
apparent on that certain ALTA/ACSM Survey of Three Embarcadero Center West-
Portion of Assessors Block 238, San Francisco, California, prepared by KCA
ENGINEERS, INC., 318 Brannan Street, San Francisco, CA 94107, dated August, 1998
(2 pages) (b) those exceptions to title for the Property as are listed on
Exhibit C attached hereto, (c) any and all matters created by or on behalf of
- ---------                                                                    
Investor or any of its Affiliates (including, without limitation, any mechanics'
liens or other claims relating to any of the due diligence inspections or
investigations of the Property performed by or on behalf of Investor, BPECW LLC
or any of their Affiliates in connection with the transactions described herein
and in the Master Transaction Agreement), and (d) all matters disclosed to or
discovered by Investor, BPECW LLC or any of their Affiliates (whether in
connection with their respective due diligence investigations and inspections or
otherwise) prior to the Redemption Date.

                                   ARTICLE 4

             REPRESENTATIONS AND WARRANTIES OF PRUDENTIAL PARTNERS
             -----------------------------------------------------

      4.1 General Statement.  The Prudential Partners make the representations
          -----------------                                                   
and warranties to BPECW LLC and Investor which are set forth in this Article 4.
                                                                     ---------  
All representations and warranties shall survive the Closing (and none shall
merge into any instrument of conveyance) for the period of any relevant statute
of limitations therefor.  All representations and warranties of the Prudential
Partners are made as of the date of this Agreement.

      4.2 Representations and Warranties.  The Prudential Partners hereby
          ------------------------------                                 
represent and warrant to BPECW LLC and Investor that:

          4.2.1  The execution and delivery of this Agreement and the other
      documents to be executed by the Partnership and/or the Prudential Partners
      in connection herewith, and the consummation of the transactions described
      in this Agreement and such documents do not require, to the knowledge of
      the Prudential Partners, the consent or approval of any governmental
      authority, nor to the Prudential Partners' knowledge does the execution
      and delivery of this Agreement and the other documents to be executed by
      the Partnership and/or the Prudential Partners in connection herewith
      violate, in any way material to the transactions described herein, any
      contract or agreement to which the Partnership or any such Prudential
      Partner is a party or (to the knowledge of the Prudential Partners) any
      governmental or judicial order, judgment, decree, statute, law, rule or
      regulation applicable to the Partnership or any Prudential Partner, and
      this Agreement and all documents to be executed by the Partnership and/or
      any Prudential Partner in connection 

                                       5

 
     with the transactions described herein constitute the legal, valid and
     binding obligations of such Person. To the knowledge of the Prudential
     Partners, none of the Partnership or any Prudential Partner is a party to,
     or bound by, any unexpired, undischarged or unsatisfied contract,
     agreement, indenture, mortgage (other than with respect to the Existing
     Mortgage Loans, ECW Swap Notes and Three ECW I/P Loans), debenture, note or
     other instrument under the terms of which performance by such Person in
     accordance with the terms and provisions of this Agreement will be a
     default or an event of acceleration, or grounds for termination, and
     whereby such default, acceleration or termination would reasonably be
     expected to have a material adverse effect on the timely performance by the
     Partnership or the Prudential Partners of their respective obligations
     under this Agreement and the other documents to be executed by any such
     Person in connection herewith, nor does the execution of this Agreement or
     the other documents to be executed by the Partnership in connection
     herewith, or the consummation of the transactions contemplated hereby and
     thereby, violate the Partnership Agreement or constitute a breach
     thereunder.

          4.2.2  The Partnership is a limited partnership duly formed and
     existing under the laws of the State of California and is not insolvent,
     and has all necessary power and authority to execute and deliver this
     Agreement and all documents executed by it in connection herewith and to
     perform all its obligations hereunder and thereunder. This Agreement has
     been duly authorized by all requisite partnership action on the part of the
     Partnership. The Partnership is not a Person other than a United States
     Person within the meaning of the Code and the transactions contemplated
     herein are not subject to the withholding provisions of section 3406 or
     subchapter A of Chapter 3 of the Code.


                                   ARTICLE 5

                  REPRESENTATIONS AND WARRANTIES OF INVESTOR
                  ------------------------------------------

     5.1   General Statement.  BPECW LLC and Investor each hereby make the
           -----------------                                              
representations and warranties to the Partnership and each Prudential Partner
which are set forth in this Article 5.  All representations and warranties shall
                            ---------                                           
survive the Closing (and none shall merge into any instrument of conveyance) for
the period of any relevant statute of limitations therefor. Representations and
warranties of BPECW LLC and Investor are made as of the date of this Agreement.

      5.2  Representations and Warranties of Investor.  Investor hereby
           ------------------------------------------                  
represents and warrants that (i) Investor is a limited partnership duly formed
and in good standing under the laws of the State of Delaware, is (or prior to
the Closing will be) duly qualified and in good standing as a foreign limited
partnership under the laws of the State of California, and has all necessary
power, partnership and otherwise, to execute and deliver this Agreement and all
other documents and instruments to be executed and delivered by Investor in
connection herewith and to perform 

                                       6

 
all its obligations hereunder and thereunder, (ii) this Agreement has been duly
authorized by all requisite partnership action on the part of Investor, (iii)
the execution and delivery of this Agreement and the other documents and
instruments to be executed and delivered by Investor in connection with the
transactions described herein, and the consummation of the transactions
contemplated hereby and thereby, do not require the consent or approval of the
partners of Investor or, to the knowledge of Investor, the consent or approval
of any governmental authority, nor, to the knowledge of Investor, does the
execution and delivery of this Agreement violate, in any way material to the
transactions contemplated hereby, any contract or agreement to which Investor is
a party or any governmental or judicial order, judgment, decree, statute, law,
rule or regulation applicable to Investor, (iv) this Agreement and all documents
and other instruments to be executed and delivered by Investor in connection
herewith constitute the legal, valid and binding obligations of Investor, (v)
Investor is not a party to, or bound by, any unexpired, undischarged or
unsatisfied contract, agreement, indenture, mortgage, debenture, note or other
instrument under the terms of which performance by Investor according to the
terms of this Agreement will be a default or an event of acceleration, or
grounds for termination, or whereby timely performance by Investor, according to
the terms of this Agreement, may be prohibited, prevented or delayed, and (vi)
BPECW LLC is a limited liability company duly organized and existing under the
laws of the State of Delaware and Investor is the sole member of BPECW LLC.

      5.3 Representations and Warranties of BPECW LLC.  BPECW LLC hereby
          -------------------------------------------                   
represents and warrants that (i) BPECW LLC is a limited liability company duly
organized and in good standing under the laws of the State of Delaware, is (or
prior to the Closing will be) duly qualified and in good standing as a foreign
limited liability company under the laws of the State of California, and has all
necessary power to execute and deliver this Agreement and all other documents
and instruments to be executed and delivered by BPECW LLC in connection herewith
and to perform all its obligations hereunder and thereunder, (ii) this Agreement
has been duly authorized by all requisite company action on the part of BPECW
LLC, (iii) the execution and delivery of this Agreement and the other documents
and instruments to be executed and delivered by BPECW LLC in connection with the
transactions described herein, and the consummation of the transactions
contemplated hereby and thereby, do not require the consent or approval of the
members of BPECW LLC or, to the knowledge of BPECW LLC, the consent or approval
of any governmental authority, nor, to the knowledge of BPECW LLC, does the
execution and delivery of this Agreement violate, in any way material to the
transactions contemplated hereby, any contract or agreement to which BPECW LLC
is a party or any governmental or judicial order, judgment, decree, statute,
law, rule or regulation applicable to BPECW LLC, (iv) this Agreement and all
documents and other instruments to be executed and delivered by BPECW LLC in
connection herewith constitute the legal, valid and binding obligations of BPECW
LLC, (v) BPECW LLC is not a party to, or bound by, any unexpired, undischarged
or unsatisfied contract, agreement, indenture, mortgage, debenture, note or
other instrument under the terms of which performance by BPECW LLC according to
the terms of this Agreement will be a default or an event of acceleration, or
grounds for termination, or whereby timely performance by BPECW LLC, according
to the terms of this Agreement, may be prohibited, prevented or delayed.

                                       7

 
                                   ARTICLE 6

                                  LIMITATIONS
                                  -----------

      6.1 Limitations.  The representations and warranties of the parties made
          -----------                                                         
in this Agreement are personal to the other parties hereto and no Person other
than a named party hereto shall be entitled to bring any action based thereon.


                                   ARTICLE 7

                             REDEMPTION PROCEDURE
                             --------------------

      7.1 Redemption Deliveries.
          --------------------- 

          7.1  Closing.  As used herein, the term "REDEMPTION DATE" shall mean
               -------                                                        
the date upon which all transactions described in Sections 7.1.2 and 7.1.3 below
                                                  --------------     -----      
are consummated.

          7.1.2  Deliveries of the Partnership.  On the date hereof, the
                 -----------------------------                          
Partnership is concurrently delivering to BPECW LLC, or is causing to be
delivered to the Escrow Agent, the following:

                 (a) Deed.  A grant deed in the form of Exhibit D attached
                     ----                               ---------  
          hereto and incorporated herein by this reference, conveying to BPECW
          LLC an undivided 37.9167% tenancy-in-common interest in and to the
          Partnership's right, title and interest in and to the Real Property,
          subject only to the Permitted Exceptions ("DEED").

                 (b) Bill of Sale.  A bill of sale in the form of Exhibit E
                     ------------                                 ---------
          attached hereto and incorporated herein by this reference, conveying
          to BPECW LLC an undivided 37.9167% tenancy-in-common interest in the
          Partnership's right, title and interest in and to the Personal
          Property.

                 (c) Assignment of Tenant Leases.  An assignment and assumption
                     ---------------------------   
          of leases in the form of Exhibit F attached hereto and incorporated
                                ---------                                 
          herein by this reference ("ASSIGNMENT OF LEASES"), transferring to
          BPECW LLC an undivided 37.9167% tenancy-in-common interest in the
          Partnership's interest in the Leases encumbering the Property on the
          date hereof described on Exhibit G attached hereto and incorporated
                                   ---------                                 
          herein by this reference and any amendments, guarantees and other
          documents relating thereto (herein collectively called the "LEASES").

                 (d) Assignment of Equipment Leases and Service Contracts.  An
                     ----------------------------------------------------     
          assignment and assumption of equipment leases, service contracts,
          warranties and 

                                       8

 
          guaranties and the Other Property Rights (to the extent the same are
          not transferred by Deed, Bill of Sale or Assignment of Leases) in the
          form of Exhibit H attached hereto and incorporated herein by this
                  ---------                                 
          reference ("ASSIGNMENT OF CONTRACTS"), transferring to BPECW LLC, to
          the extent assignable, without liability or expense to the
          Partnership, an undivided 37.9167% interest in the Partnership's
          interest in the equipment leases in effect at the Property on the
          Redemption Date, the contracts described on Exhibit B, the warranties
                                                      ---------                
          and guaranties which remain in effect on the date hereof and a
          37.9167% tenancy-in-common interest in any Other Property Rights not
          otherwise transferred to BPECW LLC (all of the foregoing being herein
          collectively called the "ASSIGNED CONTRACTS").

                 (e) Other Documents.  Such other documents as may be reasonably
                     ---------------                                            
          required by the Escrow Agent or as may be agreed upon by the
          Partnership and BPECW LLC to consummate the transactions contemplated
          by this Agreement.

          7.1.3  Deliveries of BPECW LLC.  On the date hereof, BPECW LLC is
                 -----------------------                                   
concurrently delivering to the Partnership, or is causing to be delivered to the
Escrow Agent, the following:

                 (a) Assignment of Leases.  The Assignment of Leases executed by
                     --------------------                                       
          BPECW LLC.

                 (b) Assignment of Equipment Leases and Service Contracts.  The
                     ----------------------------------------------------      
          Assignment of Contracts executed by BPECW LLC.

                 (c) Other Documents.  Such other documents as may be reasonably
                     ---------------                                            
          required by the Escrow Agent or may be agreed upon by the Partnership,
          Prudential Partners and BPECW LLC to consummate the transactions
          contemplated by this Agreement.

          7.1.4  Waiver of Failure of Conditions Precedent.  By closing the
                 -----------------------------------------                 
transactions contemplated by this Agreement, each party hereto shall be
conclusively deemed to have waived the benefit of any remaining unfulfilled
conditions precedent set forth in this Agreement and/or the Master Transaction
Agreement.

          7.1.5  Closing Costs.  The parties shall bear certain closing costs of
                 -------------                                                  
the transactions contemplated hereby as set forth in Section 10.3.2 and Exhibit
V of the Master Transaction Agreement.

                                       9

 
                                   ARTICLE 8

                                   REMEDIES
                                   --------

     8.1  Remedies.  Any party hereto shall have the right to initiate an
          --------                                                       
action for specific performance with respect to any breach or default of this
Agreement by, or to enforce any obligation under this Agreement of, any other
party hereto (including, without limitation, the obligation of the Partnership
to make, and the obligation of BPECW LLC to accept, the redemption distribution
pursuant hereto), it being acknowledged and agreed by the parties hereto that
monetary damages would be an inadequate remedy and would not adequately
compensate any non-defaulting party.  In addition to the remedy of specific
performance, any non-breaching party may initiate an action seeking actual
damages; provided that, the limitations of liability set forth in Article 12 of
         -------- ----                                                         
the Master Transaction Agreement shall apply to this Agreement, and all such
terms and provisions of said Article 12 of the Master Transaction Agreement are
hereby incorporated herein by this reference.

                                   ARTICLE 9

                                 MISCELLANEOUS
                                 -------------

     9.1  Commissions.  The parties hereto each agree to indemnify, defend,
          -----------                                                      
protect and hold the others harmless from and against any and all commissions,
finder's and/or similar fees or compensation claimed by any broker or finder in
connection with the transactions described in this Agreement based on claimed
contacts with, or other acts or omissions of, such indemnifying party. The terms
and provisions of this Section 9.1 shall survive the Closing or termination of
                       -----------                                            
this Agreement.

     9.2  Expenses.  Except as otherwise expressly set forth herein or expressly
          --------                                                              
set forth in the Master Transaction Agreement, each party hereto shall bear its
own costs and expenses with respect to the transactions contemplated hereby.

     9.3  Amendment.  This Agreement may be amended, modified or supplemented
          ---------                                                          
but only in writing signed by each of the parties hereto.

     9.4  Notices.  Any notice, request, instruction or other document to be
          -------                                                           
given hereunder by a party hereto shall be in writing and shall be deemed to
have been given, (a) when received if given in person or by courier or a courier
service, (b) on the date of transmission if sent by telex, facsimile or other
wire transmission or (c) three business days after being deposited in the U.S.
mail, certified or registered mail, postage prepaid:

 
          9.4  If to BPECW LLC or Investor, addressed as follows:

               Boston Properties, Inc.
               8 Arlington Street
               Boston, Massachusetts 02116-3495
               Attention:  General Counsel
               Facsimile:  617-421-1555

               with a copy to:

               Goulston & Storrs, P.C.
               400 Atlantic Avenue
               Boston, Massachusetts 02110-3333
               Attention:  Eli Rubenstein, Esq.
               Facsimile:  617-574-4112

          9.4  If to the Partnership or the Prudential Partners, addressed as
               follows:

               Prudential Realty Group
               8 Campus Drive
               4th Floor - Arbor Circle South
               Parsippany, New Jersey 07054
               Attention:  John R. Triece
               Facsimile:  (201) 683-1797

               with a copy to:

               The Prudential Insurance Company
               of America
               c/o Prudential Capital Group
               Four Embarcadero Center
               Suite 2700
               San Francisco, California 94111
               Attention:  Harry Mixon, Esq.
               Facsimile:  (415) 956-2197

                                      11

 
               and a copy to:

               O'Melveny & Myers LLP
               Embarcadero Center West
               275 Battery Street
               San Francisco, California 94111
               Attention:  Stephen A. Cowan, Esq.
               Facsimile:  (415) 984-8701

or to such other individual or address as a party hereto may designate for
itself by notice given as herein provided.

     9.5  Waivers.  The failure of a party hereto at any time or times to
          -------                                                        
require performance of any provision hereof shall in no manner affect its right
at a later time to enforce the same.  No waiver by a party of any condition or
of any breach of any term, covenant, representation or warranty contained in
this Agreement shall be effective unless in writing, and no waiver in any one or
more instances shall be deemed to be a further or continuing waiver of any such
condition or breach in other instances or a waiver of any other condition or
breach of any other term, covenant, representation or warranty.

     9.6  Counterparts.  This Agreement may be executed in counterparts, each of
          ------------                                                          
which shall be deemed an original, but all of which together shall constitute
one and the same instrument.

     9.7  Interpretation.  The headings preceding the text of Articles and
          --------------                                                  
Sections included in this Agreement and the headings to Exhibits and Schedules
attached to this Agreement are for convenience only and shall not be deemed part
of this Agreement or be given any effect in interpreting this Agreement.  The
use of the masculine, feminine or neuter gender herein shall not limit any
provision of this Agreement.  The use of the term "including" or "include" shall
in all cases herein mean "including, without limitation" or "include, without
limitation," respectively. Underscored references to Articles, Sections,
Subsections, Exhibits or Schedules shall refer to those portions of this
Agreement.

     9.8  Governing Law.  THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN
          -------------                                                       
ACCORDANCE WITH THE LAWS OF THE STATE OF CALIFORNIA.

     9.9  Assignment.  This Agreement shall be binding upon and inure to the
          ----------                                                        
benefit of the parties hereto and their respective successors and assigns.  No
assignment of any rights or obligations shall be made by any party without the
written consent of each other party.

     9.10 No Third Party Beneficiaries.  This Agreement is solely for the
          ----------------------------                                   
benefit of the parties hereto and, to the extent provided herein, their
respective Representatives, and no provision of this Agreement shall be deemed
to confer upon other third parties any remedy, claim, liability, reimbursement,
cause of action or other right.

                                      12

 
     9.11  Further Assurances.  Upon reasonable request of any party, each other
           ------------------                                                   
party will execute and deliver such other documents, releases, assignments and
other instruments as may be required to effectuate completely the transfer and
assignment to BPECW LLC of the Property and the redemption of the BPECW LLC
Interest and to otherwise carry out the purposes of this Agreement.

     9.12  Severability.  If any provision of this Agreement shall be held
           ------------                                                   
invalid, illegal or unenforceable, the validity, legality or enforceability of
the other provisions hereof shall not be affected thereby, and there shall be
deemed substituted for the provision at issue a valid, legal and enforceable
provision as similar as possible to the provision at issue.

     9.13  Remedies Cumulative.  The remedies provided in this Agreement shall
           -------------------                                                  
be cumulative and shall not preclude the assertion or exercise of any other
rights or remedies available by law, in equity or otherwise.

     9.14  Entire Understanding.  This Agreement, together with the other
           --------------------                                          
Transaction Documents, sets forth the entire agreement and understanding of the
parties hereto with respect to the matters set forth herein and supersedes any
and all prior agreements, arrangements and understandings among the parties.

     9.15  Consent to Jurisdiction and Service of Process.  ALL JUDICIAL
           ----------------------------------------------               
PROCEEDINGS BROUGHT AGAINST ANY PERSON ARISING OUT OF OR RELATING TO THIS
AGREEMENT MAY BE BROUGHT IN ANY STATE OR FEDERAL COURT OF COMPETENT JURISDICTION
IN THE STATE OF CALIFORNIA, AND BY EXECUTION AND DELIVERY OF THIS AGREEMENT EACH
PARTY HERETO ACCEPTS FOR ITSELF, GENERALLY AND UNCONDITIONALLY, THE NONEXCLUSIVE
JURISDICTION OF THE AFORESAID COURTS AND WAIVES ANY DEFENSE OF FORUM NON
CONVENIENS AND IRREVOCABLY AGREES TO BE BOUND BY ANY JUDGMENT RENDERED THEREBY
IN CONNECTION WITH THIS AGREEMENT.  Each party hereby agrees that service of all
process in any such proceeding in any such court may be made by registered or
certified mail, return receipt requested, to any other party hereto, at its
address provided in this Agreement, such service being hereby acknowledged by
each party to be sufficient for personal jurisdiction in any action against such
party in any such court and to be otherwise effective and binding service in
every respect.  Nothing herein shall affect the right to serve process in any
other manner permitted by law.

     9.16  Waiver of Jury Trial.  EACH OF THE PARTIES TO THIS AGREEMENT HEREBY
           --------------------                                               
AGREES TO WAIVE ITS RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF
ACTION BASED UPON OR ARISING OUT OF THIS AGREEMENT OR ANY DEALINGS BETWEEN THEM
RELATING TO THE SUBJECT MATTER OF THIS AGREEMENT.  The scope of this waiver is
intended to be all-encompassing of any and all disputes that may be filed in any
court and that relate to the subject matter of this transaction, including,
without limitation, contract claims, tort claims, breach of duty claims and all
other 

                                      13

 
common law and statutory claims.  Each party hereto acknowledges that this
waiver is a material inducement to enter into a business relationship, that each
has already relied on this waiver in entering into this Agreement, and that each
shall continue to rely on this waiver in their related future dealings.  Each
party hereto further warrants and represents that it has reviewed this waiver
with its legal counsel and that it knowingly and voluntarily waives its jury
trial rights following consultation with such legal counsel.  THIS WAIVER IS
IRREVOCABLE, MEANING THAT IT MAY NOT BE MODIFIED EITHER ORALLY OR IN WRITING,
AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS
OR MODIFICATIONS TO THIS AGREEMENT.  In the event of litigation, this Agreement
may be filed as a written consent to a trial by the court.

                                      14

 
     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed and delivered as of the date first above written.


PARTNERSHIP:        THREE EMBARCADERO CENTER WEST,
                    a California limited partnership

                    By:  THE PRUDENTIAL INSURANCE COMPANY
                         OF AMERICA, a New Jersey corporation,
                         its General Partner



                         By: /s/ Gary L. Frazier
                            --------------------------------------------------
                         Name: _______________________________
                         Title: ________________________________


BPECW LLC:          BP EC WEST LLC,
                    a Delaware limited liability company

                    By:  BOSTON PROPERTIES LIMITED PARTNERSHIP,
                         a Delaware limited partnership,
                         its sole Member

                         By:  BOSTON PROPERTIES, INC.,
                              a Delaware corporation,
                              its General Partner



                              By: /s/ Thomas J. O'Connor
                                 --------------------------------------
                              Name: Thomas J. O'Connor
                              Title: Vice President

                                      S-1

 
INVESTOR:                BOSTON PROPERTIES LIMITED PARTNERSHIP,
                         a Delaware limited partnership

                         By:  BOSTON PROPERTIES, INC.,
                              a Delaware corporation,
                              its General Partner



                         By: /s/ Thomas J. O'Connor
                            ------------------------------------------------
                         Name: Thomas J. O'Connor
                         Title: Vice President



PRUDENTIAL:              THE PRUDENTIAL INSURANCE COMPANY OF
                         AMERICA, a New Jersey corporation



                         By: /s/ Gary L. Frazier
                            ------------------------------------------------
                         Name: _____________________________________________  
                         Title: ____________________________________________
                                                                       
                                                                       
                                                                       
PIC:                     PIC REALTY CORPORATION,                       
                         a Delaware corporation                        
                                                                       
                                                                       
                                                                       
                         By: /s/ Gary L. Frazier                       
                            ------------------------------------------------
                         Name: _____________________________________________  
                         Title: ____________________________________________
                                                                       
                                                                       
PRS:                     PRUDENTIAL REALTY SECURITIES II, INC.,        
                         a Delaware corporation                        
                                                                       
                                                                       
                         By: /s/ Duane H. Tucker, Jr.                  
                            ------------------------------------------------
                         Name:  Duane H. Tucker, Jr.
                         Title:  President

                                      S-2

 
                                  SCHEDULE A

                   PERCENTAGE INTERESTS OF EXISTING PARTNERS
                   -----------------------------------------


                         GENERAL PARTNERSHIP INTERESTS
                         -----------------------------

          Prudential                                    1%
          BPECW LLC                                     1%


                         LIMITED PARTNERSHIP INTERESTS
                         -----------------------------

          PIC                                           1%
          PRS                                           1%
          Prudential                              59.0833%
          BPECW LLC                               36.9167%

                                      A-1

 
                                                                    EXHIBIT 99.5

                                   THREE ECW
                        PROPERTY CONTRIBUTION AGREEMENT


          THIS THREE ECW PROPERTY CONTRIBUTION AGREEMENT (this "AGREEMENT") is
made and entered into as of this 12th day of November, 1998, by and among THREE
EMBARCADERO CENTER WEST, a California limited partnership (the "PARTNERSHIP"),
THE PRUDENTIAL INSURANCE COMPANY OF AMERICA, a New Jersey corporation
("PRUDENTIAL"), PIC REALTY CORPORATION, a Delaware corporation ("PIC"),
PRUDENTIAL REALTY SECURITIES II, INC., a Delaware corporation ("PRS"), BOSTON
PROPERTIES LIMITED PARTNERSHIP, a Delaware limited partnership ("INVESTOR"),
BOSTON PROPERTIES, INC., a Delaware corporation ("PUBLIC COMPANY"), and BP EC
WEST LLC, a Delaware limited liability company ("BPECW LLC").


                                R E C I T A L S
                                - - - - - - - -

          A.   Pursuant to that certain Master Transaction Agreement dated as of
September 28, 1998, by and among Investor, Public Company, Prudential, PIC,
Fedmark Corporation ("FEDMARK"), Embarcadero Center Investors Partnership,
Pacific Property Services, L.P. and those Persons listed on Exhibit A-1 attached
thereto (the "MASTER TRANSACTION AGREEMENT"), the parties hereto have entered
into a series of transactions whereby BPECW LLC has received an undivided
37.9167% tenancy-in-common interest in and to the Property (defined below) in
liquidation of its interest in and to the Partnership.  All initially
capitalized terms used herein without definition shall have the respective
meanings given such terms in the Master Transaction Agreement.

          B.   The Partnership is currently governed by those certain Second
Amended and Restated Articles of Limited Partnership of Three Embarcadero Center
West dated as of January 9, 1989 (as amended, modified or supplemented, the
"PARTNERSHIP AGREEMENT").

          C.   The parties hereto desire to enter into this Agreement whereby
the Partnership will transfer its entire undivided 62.0833% tenancy-in-common
interest in and to the Property to BPECW LLC as a contribution to Investor, and
Investor shall issue to the Partnership in consideration of such contribution
Investor's Preferred Units (as defined below), all upon the terms and conditions
of this Agreement below.

          NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto hereby agree as
follows:

                                       1

 
                                   ARTICLE 1

                              CERTAIN DEFINITIONS
                              -------------------

      1.1  Definitions.  In addition to the terms defined in the Master
           -----------                                                 
Transaction Agreement and in this Agreement below, the following terms shall
have the meanings set forth below for the purposes of the transactions described
in this Agreement:

           "ASSIGNED CONTRACTS" shall have the meaning given such term in
Section 10.1.2(d) hereof.
- -----------------        

           "ASSIGNMENT OF CONTRACTS" shall have the meaning given such term in
Section 10.1.2(d) hereof.
- -----------------        

           "ASSIGNMENT OF LEASES" shall have the meaning given such term in
Section 10.1.2(c) hereof.
- -----------------        

           "CLOSING" shall have the meaning given such term in Section 10.1.1
                                                               --------------
hereof.

           "COMMISSION" shall have the meaning given such term in Section 6.3.3
                                                                  -------------
hereof.

           "CONFIDENTIAL MATERIAL" shall have the meaning given such term in
Section 9.1.1 hereof.
- -------------        

           "CONTRACTS" shall have the meaning given such term in Section 5.3.6
                                                                 -------------
hereof.

           "CONTRIBUTION UNITS" shall have the meaning given such term in
Section 2.2 hereof.
- -----------        

           "CONTRIBUTION VALUE" shall have the meaning given such term in
Section 2.2 hereof.
- -----------        

           "DEED" shall have the meaning given such term in Section 10.1.2(a)
                                                            -----------------
hereof.

           "DOCUMENTS" shall have the meaning given such term in Section 4.1.1
                                                                 -------------
hereof.

           "ENCUMBRANCE DOCUMENTS" shall have the meaning given such term in
Section 5.3.9 hereof.
- -------------        

           "EXCLUDED LIABILITIES" shall have the meaning given such term in
Section 4.2.2(b) hereof.
- ----------------        

                                       2

 
           "HAZARDOUS MATERIAL" shall have the meaning given such term in
Section 4.2.3 hereof.
- -------------        

           "INVESTOR" shall have the meaning given such term in the Introductory
Paragraph.

           "INVESTOR AGREEMENT" shall have the meaning given such term in
Section 10.1.2(m) hereof.
- -----------------        

          "INVESTOR COMMON UNITS" shall mean the Common Units as set forth in
the Investor Agreement.

           "INVESTOR PREFERRED UNITS" shall mean the Series Three Preferred
Units as set forth in the Investor Agreement.

           "INVESTOR-COVERED CLAIMS" shall have the meaning given such term in
Section 4.2.2(a) hereof.
- ----------------        

           "INVESTOR/BPECW LLC KNOWLEDGE PARTIES" shall have the meaning given
such term in Section 7.2 hereof.
             -----------        

           "LEASES" shall have the meaning given such term in Section 10.1.2(c)
                                                              -----------------
hereof.

           "LIMITATION DATE" shall have the meaning given such term in Article 8
                                                                       ---------
hereof.

           "MASTER TRANSACTION AGREEMENT" shall have the meaning given such term
in Recital A hereof.
   ---------        

           "OTHER PROPERTY RIGHTS" shall have the meaning given such term in
Section 2.1(c) hereof.
- --------------        

           "PARTNER" shall mean any partner of the Partnership as of the
effective time of this Agreement.

           "PARTNERSHIP" shall have the meaning given such term in the
Introductory Paragraph.

           "PARTNERSHIP AGREEMENT" shall have the meaning given such term in
Recital B hereof.
- ---------        

           "PARTNERSHIP KNOWLEDGE PARTIES" shall have the meaning given such
term in Section 5.2 hereof.
        -----------        

                                       3

 
           "PARTNERSHIP PARTIES" shall have the meaning given such term in
Section 4.2.1 hereof.
- -------------        

           "PARTNERSHIP WARRANTIES" shall have the meaning given such term in
Section 4.2.1 hereof.
- -------------        

           "PERSONAL PROPERTY" shall have the meaning given such term in Section
                                                                         -------
2.1(b) hereof.
- ------        

           "PROPERTY" shall have the meaning given such term in Section 2.1
                                                                -----------
hereof.

           "PROPERTY DOCUMENTS" shall have the meaning given such term in
Section 10.1.2(h) hereof.
- -----------------        

           "PROVIDING PARTY" shall have the meaning given such term in Section
                                                                       -------
9.1.1 hereof.
- -----        

           "PRUDENTIAL" shall have the meaning given such term in the
Introductory Paragraph.

           "PUBLIC COMPANY" shall have the meaning given such term in the
Introductory Paragraph.

           "PUBLIC COMPANY KNOWLEDGE PARTIES" shall have the meaning given such
term in Section 6.2 hereof.
        -----------        

           "REAL PROPERTY" shall have the meaning given such term in Section
                                                                     -------
2.1(a) hereof.
- ------        

           "RECEIVING PARTY" shall have the meaning given such term in Section
                                                                       -------
9.1.1 hereof.
- -----        

           "REGISTRATION RIGHTS AGREEMENT" shall have the meaning given such
term in Section 10.1.2(n) hereof.
        -----------------        

           "REPRESENTATIVES" shall have the meaning given such term in Section
                                                                       -------
9.1.1 hereof.
- -----        

           "SEC DOCUMENTS" shall have the meaning given such term in Section
                                                                     -------
6.3.3 hereof.
- -----        

          "SECURITIES" shall mean, as applicable, the Shares, the Investor
Common Units and the Investor Preferred Units that may be issued pursuant to the
Investor Agreement.

           "SECURITIES ACT" shall mean the Securities Act of 1933, as amended.

           "SHARES" shall mean the shares of the Public Company's common stock,
$0.01 par value per share.

                                       4

 
          "TAX REPORTING AGREEMENT" shall have the meaning given such term in
Section 10(p) attached hereto.
- -------------                 

          "TAX RETURN" shall mean any return, report or other document or
information required to be supplied to a taxing authority in connection with
Taxes.

          "TAXES" shall mean all taxes, charges, fees, levies or other
assessments, including, without limitation, income, gross receipts, excise,
property, sales, withholding, social security, occupation, use, service,
license, payroll, franchise, transfer, recording taxes, fees and charges,
imposed by the United States, or any state, local or foreign government or
subdivision or agency thereof, whether computed on a separate, consolidated,
unitary, combined or any other basis; and such terms shall include any interest,
fines, penalties or additional amounts attributable to or imposed on or with
respect to any such taxes, charges, fees, levies or other assessments.

          "THREE ECW BUILDING MAXIMUM LIABILITY AMOUNT" shall mean an amount
equal to (i) 62.0833%, multiplied by (ii) the product of (x) five percent (5%),
                       ---------- --                                           
multiplied by (y) the NMV of the Property.

           "TRANSFEREE PARTIES" shall have the meaning given such term in
Section 4.2.2(a) hereof.
- ----------------        

                                   ARTICLE 2

                                 CONTRIBUTION
                                 ------------

      2.1  Contribution.  Subject to the terms and conditions set forth in this
           ------------                                                        
Agreement, the Partnership is hereby concurrently transferring to BPECW LLC (an
entity which is wholly owned by Investor), as a contribution to Investor, and
BPECW LLC is accepting, in exchange for the Contribution Units (defined below),
the Partnership's entire undivided 62.0833% tenancy-in-common right, title and
interest in and to the following (collectively, the "PROPERTY"):

           (a) Real Property.  That certain real estate located at 275 Battery
               -------------                                                  
     Street, City of San Francisco, County of San Francisco, State of
     California, legally described on Exhibit A attached hereto and incorporated
                                      ---------                                 
     herein by this reference, together with all buildings, improvements and
     fixtures located thereon and all rights, privileges and appurtenances
     pertaining thereto, including all of the Partnership's right, title and
     interest in and to all rights-of-way, open or proposed streets, alleys,
     easements, strips or gores of land adjacent thereto (herein collectively
     called the "REAL PROPERTY"); and

           (b) Personal Property.  All tangible and intangible personal property
               -----------------                                                
     of the Partnership (excluding any computer or computer equipment and
     software owned by the Partnership or PPS), located on the Real Property,
     and used in the ownership, operation and maintenance of the Real Property,
     and all books, records and files (excluding 

                                       5

 
     appraisals, budgets, the Partnership's strategic plans for the Property,
     marketing information, submissions relating to the Partnership's obtaining
     of corporate authorization, or other information in the possession or
     control of the Partnership or PPS which is privileged (provided that
     inadvertent disclosure shall not constitute a waiver of any privilege),
     relating to the Real Property, and all accounts receivable, accounts
     payable, cash, deposit accounts and money held by the Partnership as of the
     Closing Date (herein collectively called the "PERSONAL PROPERTY"); and

          (c) Other Property Rights.  (i) The Partnership's interest as
              ---------------------                                    
     "landlord" in all Leases; and (ii) if and to the extent assignable by the
     Partnership, (A) all service, supply, maintenance and utility agreements,
     all equipment leases and all other agreements relating to the Property that
     are described on Exhibit B attached hereto and incorporated herein by this
                      ---------                                                
     reference, (B) all licenses, permits and other written authorizations
     necessary for the use, operation or ownership of the Real Property or
     Personal Property and in the Partnership's possession or control, (C) the
     Partnership's interest, if any, in and to the name "Embarcadero Center
     West" or any similar name of the Building, and (D) all other assets and
     liabilities of the Partnership (other than any liabilities that are
     Excluded Liabilities as defined in Section 4.2.2(b)) immediately prior to
                                        ----------------                      
     the Closing, it being acknowledged and agreed that the sole assets and
     liabilities of the Partnership immediately after the Closing shall be the
     name of the Partnership, "Three Embarcadero Center West", the Contribution
     Units received pursuant to this Agreement, and those liabilities of the
     Partnership expressly provided for in this Agreement (the rights of the
     Partnership described in clauses (i) and (ii) hereinabove being herein
                              -----------     ----                         
     collectively called the "OTHER PROPERTY RIGHTS"); provided, however, that
     the Partnership covenants to, at the request of BPECW LLC, change its name
     promptly after the Closing Date to eliminate the word "Embarcadero" from
     its name.

     2.2 Payment of Units.  In consideration of the contribution of the
         ----------------                                              
Property to BPECW LLC, Investor is hereby concurrently delivering to the
Partnership an aggregate number of Investor Preferred Units (the "CONTRIBUTION
UNITS") equal to (x) the Contribution Value (defined immediately below), divided
                                                                         -------
by (y) $50.  As used herein, the term "CONTRIBUTION VALUE" shall mean an amount
- --                                                                             
equal to $9,600,037 (which amount equals (A) the Partnership's undivided
tenancy-in-common percentage interest in the Property immediately prior to the
Closing, multiplied by (B) the NEV of the Property, and which amount may be
         ---------- --                                                     
adjusted after the date hereof and after the Closing Date to an amount equal
such undivided tenancy-in-common percentage interest of the Partnership in the
Property immediately prior to the Closing Date multiplied by the Adjusted NEV of
the Property pursuant to and in accordance with the terms and provisions of
Section 10.1.7 hereof and Exhibit V of the Master Transaction Agreement).
- --------------                                                           

                                       6

 
                                   ARTICLE 3

                                 TITLE MATTERS
                                 -------------

     3.1 Title to Real Property.  The Partnership shall contribute, and BPECW
         ----------------------                                              
LLC shall accept, title to the Real Property, subject only to: (a) such matters
as are visible or apparent on that certain Preliminary ALTA/ACSM Survey of Three
Embarcadero Center West - Portion of Assessors Block 238, San Francisco,
California, prepared by KCA Engineers, Inc., 318 Brannan Street, San Francisco,
California 94107, dated August, 1998 (2 pages), (b) those exceptions to title
for the Property as are listed on Exhibit C attached hereto, (c) any and all
                                  ---------                                 
matters created by or on behalf of BPECW LLC, Investor or any of their
Affiliates (including, without limitation, any mechanics' liens or other claims
relating to any of its due diligence inspections or investigations of the
Property performed by or on behalf of BPECW LLC, Investor or any of their
Affiliates in connection with the transactions described herein and in the
Master Transaction Agreement), and (d) all matters disclosed to or discovered by
BPECW LLC, Investor or any of their Affiliates (whether in connection with their
respective due diligence investigations and inspections or otherwise) prior to
the date hereof.

                                   ARTICLE 4

                    DUE DILIGENCE/CONDITION OF THE PROPERTY
                    ---------------------------------------

     4.1 Inspections and Due Diligence.
         ----------------------------- 

         4.1.1 Due Diligence Approval.  BPECW LLC, Investor and Public Company
               ----------------------                                         
(Investor's sole general partner) each hereby acknowledges and agrees that, as
of the date of the execution of this Agreement, it has been given the full
opportunity to review, inspect and investigate all of the files known or made
available to such Person maintained by PPS on behalf of the Partnership relating
to the Property that it deems necessary to review (the "DOCUMENTS"), and has had
an opportunity to conduct a thorough review, investigation, and inspection of
the physical (including, without limitation, the seismic load bearing
capabilities), environmental, economic, and legal conditions of the Property,
the laws, regulations, covenants, conditions, and restrictions affecting or
governing the use or operation of the Property, the rentable square footage of
the Property, and all other matters which a prudent transferee of commercial
real property should review, inspect or investigate in the course of a due
diligence review, and BPECW LLC, Investor and Public Company has each approved
the condition of the Property and the results of such review, inspection and
investigation.

         4.1.2 Indemnity.  BPECW LLC, Investor and Public Company shall each
               ---------                                                    
indemnify, protect, defend, and hold harmless the Partnership and the Prudential
Partners from and against any and all claims, demands, causes of action, losses,
damages and liabilities, including, without limitation, personal injuries and
property damage, and shall immediately discharge any liens and encumbrances,
arising out of acts or omissions of BPECW LLC, Investor, 

                                       7

 
Public Company or any of their agents, contractors, or representatives,
committed on or about the Property in the course of any such Person's due
diligence reviews, inspections and investigations, including, without
limitation, claims, demands, causes of action, losses, damages and liabilities
on the part of the tenants and lessees alleging breach of a Lease as a result of
any such Person's acts or omissions.

          4.1.3  Survivability.  The terms and provisions of this Section 4.1
                 -------------                                    -----------
shall survive the Closing.

     4.2  Property Contributed "As Is".
          ---------------------------- 

          4.2.1  "As Is, Where Is, With All Faults".  BPECW LLC, INVESTOR AND
                 ----------------------------------                          
PUBLIC COMPANY EACH ACKNOWLEDGES AND AGREES THAT : (i) EXCEPT FOR THE EXCLUDED
LIABILITIES, THE PROPERTY SHALL BE TRANSFERRED TO BPECW LLC, AND BPECW LLC SHALL
ACCEPT THE PROPERTY ON THE DATE HEREOF, "AS IS, WHERE IS, WITH ALL FAULTS"; (ii)
EXCEPT FOR THE REPRESENTATIONS AND WARRANTIES OF THE PARTNERSHIP SET FORTH IN
ARTICLES 5 AND 6, RESPECTIVELY TOGETHER WITH THE REPRESENTATIONS OF THE
- ----------     -                                                       
PARTNERSHIP IN ANY CLOSING DOCUMENT IT DELIVERS PURSUANT TO SECTION 10.1.2
                                                            --------------
(HEREIN COLLECTIVELY CALLED THE "PARTNERSHIP WARRANTIES"), NONE OF THE
PARTNERSHIP, ITS PARTNERS, THEIR RESPECTIVE SALES AGENTS, NOR ANY PARTNER,
OFFICER, DIRECTOR, EMPLOYEE, AGENT OR ATTORNEY OF THE PARTNERSHIP OR ITS
PARTNERS, THEIR COUNSEL, BROKERS, OR SALES AGENTS, NOR ANY OTHER PERSON RELATED
IN ANY WAY TO ANY OF THE FOREGOING (ALL OF WHICH PERSONS ARE HEREIN COLLECTIVELY
CALLED THE "PARTNERSHIP PARTIES") HAVE OR SHALL BE DEEMED TO HAVE MADE ANY
VERBAL OR WRITTEN REPRESENTATIONS, WARRANTIES, PROMISES OR GUARANTEES (WHETHER
EXPRESS, IMPLIED, STATUTORY OR OTHERWISE) TO BPECW LLC, INVESTOR OR PUBLIC
COMPANY WITH RESPECT TO THE PROPERTY, ANY MATTER SET FORTH, CONTAINED OR
ADDRESSED IN ANY DOCUMENTS REVIEWED BY BPECW LLC, INVESTOR OR PUBLIC COMPANY
(INCLUDING, BUT NOT LIMITED TO, THE ACCURACY AND COMPLETENESS THEREOF) OR THE
RESULTS OF BPECW LLC'S, INVESTOR'S AND PUBLIC COMPANY'S DUE DILIGENCE
INVESTIGATIONS; AND (iii) BPECW LLC, INVESTOR AND PUBLIC COMPANY EACH HAS
CONFIRMED INDEPENDENTLY ALL INFORMATION THAT IT CONSIDERS MATERIAL TO ITS
ACQUISITION OF THE PROPERTY AND THE TRANSACTIONS CONTEMPLATED HEREBY.  BPECW
LLC, INVESTOR AND PUBLIC COMPANY EACH HEREBY SPECIFICALLY ACKNOWLEDGES THAT,
EXCEPT FOR THE PARTNERSHIP WARRANTIES, IT IS NOT RELYING AND SHALL NOT RELY ON
                                             ---                   ---        
(AND EACH OF THE PARTNERSHIP PARTIES DOES HEREBY DISCLAIM AND RENOUNCE) ANY
REPRESENTATIONS OR WARRANTIES OF ANY KIND OR NATURE WHATSOEVER, WHETHER ORAL OR
WRITTEN, EXPRESS, IMPLIED, STATUTORY OR OTHERWISE, FROM ANY OF THE PARTNERSHIP
PARTIES, AS TO:  (1) THE OPERATION OF THE 

                                       8

 
PROPERTY OR THE INCOME POTENTIAL, USES, OR MERCHANTABILITY OR FITNESS OF ANY
PORTION OF THE PROPERTY FOR A PARTICULAR PURPOSE; (2) THE PHYSICAL CONDITION OR
SAFETY OF THE PROPERTY OR ANY IMPROVEMENTS THEREON; (3) THE PRESENCE OR ABSENCE,
LOCATION OR SCOPE OF ANY HAZARDOUS MATERIALS IN, AT, OR UNDER THE PROPERTY; (4)
THE ACCURACY OF ANY STATEMENTS, CALCULATIONS OR CONDITIONS STATED OR SET FORTH
IN THE PARTNERSHIP'S OR PPS's BOOKS AND RECORDS CONCERNING THE PROPERTY OR SET
FORTH IN ANY OF THE PARTNERSHIP PARTIES' OFFERING MATERIALS WITH RESPECT TO THE
PROPERTY PRIOR TO THE DATE HEREOF; (5) THE DIMENSIONS OF THE PROPERTY OR THE
ACCURACY OF ANY FLOOR PLANS, SQUARE FOOTAGE, LEASE ABSTRACTS, SKETCHES, REVENUE
OR EXPENSE PROJECTIONS RELATED TO THE PROPERTY; (6) THE OPERATING PERFORMANCE,
THE INCOME AND EXPENSES OF THE PROPERTY OR THE ECONOMIC STATUS OF THE PROPERTY;
(7) THE ABILITY OF BPECW LLC, INVESTOR AND PUBLIC COMPANY TO OBTAIN ANY AND ALL
NECESSARY GOVERNMENTAL APPROVALS OR PERMITS FOR THE INTENDED USE AND DEVELOPMENT
OF THE PROPERTY; AND (8) THE LEASING STATUS OF THE PROPERTY OR THE INTENTIONS OF
ANY PERSONS WITH RESPECT TO THE NEGOTIATION AND/OR EXECUTION OF ANY LEASE FOR
ANY PORTION OF THE PROPERTY. BPECW LLC, INVESTOR AND PUBLIC COMPANY EACH FURTHER
ACKNOWLEDGES AND AGREES THAT, EXCEPT FOR THE PARTNERSHIP WARRANTIES, THE
PARTNERSHIP PARTIES ARE UNDER NO DUTY TO MAKE ANY AFFIRMATIVE DISCLOSURES OR
INQUIRY REGARDING ANY MATTER WHICH MAY BE KNOWN TO ANY OF THE PARTNERSHIP
PARTIES.

           4.2.2  Releases and Indemnities.  BPECW LLC'S, INVESTOR'S AND PUBLIC
                  ------------------------                                     
COMPANY'S RELEASE AND INDEMNITY:

                 (a) FROM AND AFTER THE DATE HEREOF, BPECW LLC SHALL ASSUME ALL
          RISKS WITH RESPECT TO THE PROPERTY, KNOWN AND UNKNOWN, SUSPECTED AND
          UNSUSPECTED, EXCEPTING ONLY THE EXCLUDED LIABILITIES (AS DEFINED IN
          SECTION 4.2.2(b) BELOW). EXCEPT AS OTHERWISE EXPRESSLY PROVIDED IN
          ----------------                                                  
          SECTION 4.2.2(b) BELOW WITH RESPECT TO EXCLUDED LIABILITIES AND
          ----------------                                               
          SECTION 4.2.2(c) BELOW WITH RESPECT TO THE PARTNERSHIP WARRANTIES,
          ----------------                                                  
          UPON THE CLOSING, BPECW LLC, INVESTOR, PUBLIC COMPANY AND THEIR
          AGENTS, EMPLOYEES, AFFILIATES, SUCCESSORS AND ASSIGNS (COLLECTIVELY,
          "TRANSFEREE PARTIES"), SHALL BE SOLELY LIABLE FOR, AND SHALL
          INDEMNIFY, DEFEND, PROTECT AND HOLD HARMLESS THE PARTNERSHIP PARTIES
          FROM ANY AND ALL CLAIMS, DEMANDS, CAUSES OF ACTION, LOSSES,
          LIABILITIES, COSTS AND EXPENSES (INCLUDING REASONABLE ATTORNEYS' FEES)
          AT LAW OR IN EQUITY, KNOWN OR UNKNOWN, SUSPECTED OR UNSUSPECTED,
          RELATING TO BODILY 

                                       9

 
          INJURY, DEATH, PROPERTY DAMAGE, ECONOMIC LOSS, OR OTHER DAMAGES
          SUFFERED BY ANY OF THE PARTNERSHIP PARTIES ARISING OUT OF OR RELATING
          TO THE PROPERTY, INCLUDING, WITHOUT LIMITATION, THE PHYSICAL,
          ENVIRONMENTAL, ECONOMIC, LEGAL OR OTHER CONDITION OF THE PROPERTY,
          INCLUDING, WITHOUT LIMITATION, ANY SUCH CLAIMS OR LIABILITIES RELATING
          TO THE PRESENCE, DISCOVERY OR REMOVAL OF ANY HAZARDOUS MATERIALS IN,
          AT, ABOUT OR UNDER THE PROPERTY, OR FOR, CONNECTED WITH OR ARISING OUT
          OF ANY AND ALL CLAIMS OR CAUSES OF ACTION BASED UPON CERCLA
          (COMPREHENSIVE ENVIRONMENTAL RESPONSE, COMPENSATION, AND LIABILITY ACT
          OF 1980, 42 U.S.C. (S)(S)9601 ET SEQ., AS AMENDED BY SARA [SUPERFUND
          AMENDMENT AND REAUTHORIZATION ACT OF 1986] AND AS MAY BE FURTHER
          AMENDED FROM TIME TO TIME), THE RESOURCE CONSERVATION AND RECOVERY ACT
          OF 1976, 42 U.S.C. (S)(S)6901 ET SEQ., OR ANY RELATED CLAIMS OR CAUSES
          OF ACTION OR ANY OTHER FEDERAL OR STATE BASED STATUTORY OR REGULATORY
          CAUSES OF ACTION FOR ENVIRONMENTAL CONTAMINATION AT, IN OR UNDER THE
          PROPERTY (HEREINAFTER "INVESTOR-COVERED CLAIMS").

               (b) NOTWITHSTANDING THE FOREGOING, THE TERM "INVESTOR-COVERED
          CLAIMS" SHALL EXCLUDE, AND NONE OF BPECW LLC, INVESTOR OR THE PUBLIC
          COMPANY SHALL ASSUME, THE FOLLOWING (COLLECTIVELY, "EXCLUDED
          LIABILITIES"): (x) ANY AND ALL LIABILITIES AND OBLIGATIONS OF THE
          PARTNERSHIP TO THE EXTENT THAT SUCH LIABILITIES AND OBLIGATIONS DO NOT
          ARISE FROM OR RELATE TO THE USE, OWNERSHIP OR OPERATION OF THE
          PROPERTY, AND (y) ANY AND ALL OBLIGATIONS AND LIABILITIES ARISING FROM
          OR IN CONNECTION WITH THE USE, OWNERSHIP OR OPERATION OF THE PROPERTY
          ACCRUING PRIOR TO THE DATE HEREOF OTHER THAN (i) OBLIGATIONS AND
          LIABILITIES ASSUMED IN WRITING BY BPECW LLC IN CONNECTION WITH THE
          LEASES AND/OR CONTRACTS AND ALL OTHER OBLIGATIONS AND LIABILITIES THAT
          BPECW LLC EXPRESSLY ASSUMES IN WRITING AT OR PRIOR TO THE CLOSING,
          (ii) OBLIGATIONS AND LIABILITIES FOR WHICH BPECW LLC OR INVESTOR HAS
          RECEIVED A PRORATION CREDIT PURSUANT TO EXHIBIT V OF THE MASTER
          TRANSACTION AGREEMENT, AND (iii) OBLIGATIONS AND LIABILITIES RELATING
          IN ANY WAY TO THE PHYSICAL OR ENVIRONMENTAL CONDITION OF THE PROPERTY
          OTHER THAN ANY CLAIMS MADE BY, OR CAUSES OF ACTION BROUGHT BY, ANY
          THIRD PARTY UNRELATED TO BPECW LLC, INVESTOR OR ANY OF THEIR
          AFFILIATES WHERE THE INJURY OR 

                                       10

 
          DAMAGE GIVING RISE TO SUCH CLAIM OR CAUSE OF ACTION AROSE OR OCCURRED
          DURING THE PERIOD PRIOR TO THE DATE HEREOF.

               (c) TRANSFEREE PARTIES EACH HEREBY GENERALLY AND FULLY RELEASE
          THE PARTNERSHIP PARTIES FROM ANY AND ALL STATEMENTS OR OPINIONS
          HERETOFORE MADE, OR INFORMATION FURNISHED IN CONNECTION WITH THE
          TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT, BY THE PARTNERSHIP
          PARTIES TO ANY OF THE TRANSFEREE PARTIES, EXCEPT FOR THE PARTNERSHIP
          WARRANTIES; AND FROM ANY AND ALL INVESTOR-COVERED CLAIMS, KNOWN OR
          UNKNOWN, SUSPECTED OR UNSUSPECTED.

               WITH RESPECT TO THE RELEASES AND WAIVERS CONTAINED IN THIS
          SUBSECTION 4.2.2(c), THE TRANSFEREE PARTIES EXPRESSLY WAIVE THE
          -------------------                                            
          BENEFITS OF SECTION 1542 OF THE CALIFORNIA CIVIL CODE, WHICH PROVIDES
          AS FOLLOWS:

               "A GENERAL RELEASE DOES NOT EXTEND TO CLAIMS WHICH THE CREDITOR
               DOES NOT KNOW OR SUSPECT TO EXIST IN HIS FAVOR AT THE TIME OF
               EXECUTING THE RELEASE, WHICH IF KNOWN BY HIM MUST HAVE MATERIALLY
               AFFECTED HIS SETTLEMENT WITH THE DEBTOR."

               BPECW LLC, INVESTOR AND PUBLIC COMPANY HAS EACH BEEN ADVISED BY
          ITS LEGAL COUNSEL AND UNDERSTANDS THE SIGNIFICANCE OF THIS WAIVER OF
          SECTION 1542 RELATING TO UNKNOWN, UNSUSPECTED AND CONCEALED CLAIMS.
          BY ITS INITIALS BELOW, EACH OF BPECW LLC, INVESTOR AND PUBLIC COMPANY
          ACKNOWLEDGES THAT IT FULLY UNDERSTANDS, APPRECIATES, AND ACCEPTS ALL
          OF THE TERMS OF THIS SUBSECTION 4.2.2(c).
                               ------------------- 

                                         _________________________
                                         BPECW LLC's Initials

                                         _________________________
                                         Investor's Initials

                                         _________________________
                                         Public Company's Initials

                                       11

 
                 (d) NOTWITHSTANDING THE FOREGOING, THE PARTNERSHIP SHALL BE
          SOLELY LIABLE FOR, AND SHALL INDEMNIFY, DEFEND (AND CONTROL THE
          RESOLUTION OF), PROTECT AND HOLD HARMLESS TRANSFEREE PARTIES FROM ANY
          AND ALL CLAIMS, DEMANDS, CAUSES OF ACTION, LOSSES, LIABILITIES, COSTS
          AND EXPENSES (INCLUDING REASONABLE ATTORNEYS' FEES) AT LAW OR IN
          EQUITY, KNOWN OR UNKNOWN, SUSPECTED OR UNSUSPECTED, RELATING TO BODILY
          INJURY, DEATH, PROPERTY DAMAGE, ECONOMIC LOSS, OR OTHER DAMAGES
          SUFFERED BY ANY TRANSFEREE PARTIES ARISING OUT OF OR RELATING TO THE
          EXCLUDED LIABILITIES.

          4.2.3  Definition of Hazardous Materials.  For purposes of this
                 ---------------------------------                       
Agreement, the term "HAZARDOUS MATERIAL" shall mean any substance, chemical,
waste or material that is or becomes regulated by any federal, state or local
governmental authority because of its toxicity, infectiousness, radioactivity,
explosiveness, ignitability, corrosiveness or reactivity, including, without
limitation, asbestos or any substance containing more than 0.1 percent asbestos,
the group of compounds known as polychlorinated biphenyls, flammable explosives,
oil, petroleum or any refined petroleum product.

          4.2.4  Provisions Material. BPECW LLC, Investor and Public Company
                 -------------------         
each acknowledges and agrees that the provisions of this Article 4 were a
                                                         ---------       
material factor in the transfer of the Property to BPECW LLC as a contribution
to Investor and the acceptance of the Contribution Value by the Partnership and,
while the Partnership has made the Documents available to BPECW LLC, Investor
and Public Company and cooperated with BPECW LLC, Investor and Public Company in
their due diligence investigations and inspections, the Partnership is unwilling
to contribute the Property to BPECW LLC unless the Partnership Parties are
expressly released as set forth in Subsection 4.2.2(b).
                                   ------------------- 

          4.2.5  Survivability. Notwithstanding anything to the contrary herein,
                 -------------        
the provisions of this Section 4.2 shall survive the Closing and shall not be
                       -----------                                           
merged in the transfer of the Property as a contribution to Investor.

                                   ARTICLE 5

               REPRESENTATIONS AND WARRANTIES AS TO THE PROPERTY
               -------------------------------------------------

     5.1  General Statement.  The Partnership and its Partners make the
          -----------------                                            
representations and warranties with respect to the Partnership and the Property
to BPECW LLC, Investor and Public Company which are set forth in this Article 5.
                                                                      ---------
All representations and warranties set forth in Section 5.3 below shall, subject
                                                -----------                     
 to the limitations of Section 11.1, survive the Closing (and none shall merge
                       ------------                                           
into any instrument of conveyance) for the period of time set forth in Article 8
                                                                       ---------
and all representations and warranties set forth in Sections 5.5 and 5.6 hereof
                                                    ------------     ---       
shall, subject to the 

                                       12

 
limitations of Section 11.1, survive the Closing (and none shall merge into any
               ------------                               
instrument of conveyance) for the period of any relevant statute of limitations
therefor. All representations and warranties of the Partnership are made as of
the date of this Agreement.

     5.2  Attribution.  For purposes of this Agreement, the words "knowledge of
          -----------                                                          
the Partnership" or "Partnership's knowledge" shall mean the actual and not
constructive knowledge of John Triece, Richard E. Salomon, Thomas Hendrian and
John Syage (collectively, the "PARTNERSHIP KNOWLEDGE PARTIES"). The Partnership
Knowledge Parties shall have no liability hereunder of any kind. Any fact,
matter or other statement shall not be deemed to be within the knowledge of the
Partnership or Partnership's knowledge unless the Partnership Knowledge Parties
have actual knowledge of such fact, matter or other statement. Notwithstanding
the foregoing, the representations and warranties made by the Partnership under
Sections 5.5 and 5.6 below are intended to be absolute in nature and are not
- ------------     ---                                                        
limited by the knowledge or attribution limitations of this Section 5.2.
                                                            ----------- 

     5.3  Representations and Warranties Re: Property.  The Partnership and its
          -------------------------------------------                          
Partners hereby represent and warrant to BPECW LLC, Investor and Public Company,
except as set forth on any Exhibit attached hereto and referred to below, that:
                           -------                                             

          5.3.1  The execution and delivery of this Agreement and the other
     documents to be executed by the Partnership or any Partner in connection
     herewith, and the consummation of the transactions described in this
     Agreement and such documents do not require, to the knowledge of the
     Partnership, the consent or approval of any governmental authority, nor to
     the Partnership's knowledge does the execution and delivery of this
     Agreement and the other documents to be executed by the Partnership or any
     Partner in connection herewith violate, in any way material to the
     transactions described herein, any contract or agreement to which the
     Partnership or any Partner is a party or (to the knowledge of the
     Partnership) any governmental or judicial order, judgment, decree, statute,
     law, rule or regulation applicable to the Partnership, any Partner or the
     Property, and this Agreement and all documents to be executed by the
     Partnership or any Partner in connection with the transactions described
     herein constitute the legal, valid and binding obligations of the
     Partnership and each such Partner.

          To the Partnership's knowledge, the Partnership and the Partners are
     not a party to, or bound by, any unexpired, undischarged or unsatisfied
     contract, agreement, indenture, mortgage (other than with respect to the
     Existing Mortgage Loans, ECW Swap Notes made by Three ECW and Three ECW I/P
     Loans), debenture, note or other instrument under the terms of which
     performance by the Partnership or any such Partner in accordance with the
     terms and provisions of this Agreement will be a default or an event of
     acceleration, or grounds for termination, and whereby such default,
     acceleration or termination would reasonably be expected to have a material
     adverse effect on the timely performance by the Partnership or any such
     Partner of its obligations under this Agreement and the other documents to
     be executed by the Partnership or such Partner in connection 

                                       13

 
     herewith, nor does the execution of this Agreement or the other documents
     to be executed by the Partnership or any such Partner in connection
     herewith, or the consummation of the transactions contemplated hereby and
     thereby, violate the partnership agreement of the Partnership or constitute
     a breach thereunder.

          5.3.2  The Partnership has no employees.

          5.3.3  To the Partnership's knowledge, except as listed on Exhibit D,
                                                                     --------- 
     the Partnership has not received any written notice of pending or
     threatened litigation, judgment, arbitration, investigation or proceeding
     against the Property that, if determined adversely, would reasonably be
     expected to have a material adverse effect on the operation, use or value
     of the Property or on BPECW LLC's or Investor's ability to obtain any
     financing necessary to close the transactions contemplated by this
     Agreement, nor has the Partnership received any explicit oral notice of any
     such threatened litigation, judgment, arbitration, investigation or
     proceeding.

          5.3.4  To the Partnership's knowledge, except as listed on Exhibit D,
                                                                     --------- 
     there are no Claims or liabilities affecting the Property that have not
     been previously disclosed in writing to BPECW LLC, Investor, Public Company
     or any of their Affiliates which would be binding upon BPECW LLC or
     Investor after Closing and have a material adverse effect on the operation,
     use or value of the Property or on BPECW LLC's or Investor's ability to
     obtain any financing necessary to close the transactions contemplated by
     this Agreement.

          5.3.5  To the Partnership's knowledge, except as listed on Exhibit D,
                                                                     --------- 
     the Partnership has not received any written notice from any governmental
     authority of any special assessment, pending condemnation, and to the
     Partnership's knowledge, the Property is not in violation and the
     Partnership has not received notice of violation of any zoning, building,
     fire, or health code, statute, ordinance, rule or regulation applicable to
     the Property that would reasonably be expected to have a material adverse
     effect on the operation, use or value of the Property or on BPECW LLC's or
     Investor's ability to obtain any financing necessary to close the
     transactions contemplated by this Agreement.

          5.3.6  To the Partnership's knowledge, the Partnership has not entered
     into any written equipment leases, service contracts or other such
     contracts or agreements affecting the Property which will remain in effect
     after the Closing Date and which will be binding upon BPECW LLC after the
     Closing Date and which are not terminable or cancelable upon thirty (30)
     days notice (collectively, "CONTRACTS") other than those listed on Exhibit
                                                                        -------
     B attached hereto.
     -                 

          5.3.7  To the Partnership's knowledge, the only Leases which will
     encumber the Property after the Closing are listed on Exhibit E attached
                                                           ---------         
     hereto.

                                       14

 
          5.3.8  To the Partnership's knowledge, there are no agreements
     affecting the Property with third parties for the provision of leasing
     brokerage services or under which leasing commissions would become due from
     and after the Closing, except as set forth on Exhibit D attached hereto.
                                                   ---------                 

          5.3.9  To the Partnership's knowledge, the Partnership is not in
     default and has not received any written notice of any defaults under the
     terms of any of the Contracts, Leases or Encumbrance Documents that would
     have a material adverse effect on the use, operation or value of the
     Property after the Closing or on BPECW LLC's or Investor's ability to
     obtain any financing necessary to close the transactions contemplated by
     this Agreement, except as set forth on Exhibit D. As used herein, the term
                                            ---------                           
     "ENCUMBRANCE DOCUMENTS" shall mean, collectively, all mortgages, deeds of
     trust, easements and other material agreements appurtenant to or burdening
     the Property.

          5.3.10 To the Partnership's knowledge, no rent or other amounts (other
     than security deposits) have been prepaid under any of the Leases,
     Contracts or Encumbrance Documents more than thirty (30) days in advance of
     the due dates thereof, except as set forth on Exhibit D or, in the case of
                                                   ---------                   
     Contracts, the proration schedule attached to Exhibit V of the Master
     Transaction Agreement (which will be provided on the date required by said
     Exhibit V).

     5.4  Qualifications to Representations and Warranties.  To the extent that
          ------------------------------------------------                     
any of the representations or warranties of the Partnership and its Partners
under Section 5.3 are known to BPECW LLC, Investor, Public Company or any of
      -----------                                                           
their Affiliates to be inaccurate on the Closing Date and such Persons
nevertheless close the transactions contemplated by this Agreement, such
representation(s) and warranty(ies) shall be deemed modified to the extent of
such known inaccuracy and the Partnership shall not be deemed in breach of the
representation or warranty. Notwithstanding anything to the contrary stated or
implied herein and in furtherance of the foregoing provisions of this Section
                                                                      -------
5.4, the Partnership shall have no liability for or with respect to any
- ---                                                                    
representation or warranty (or breach thereof) from and after the Closing if,
prior to the Closing, BPECW LLC, Investor, Public Company or any of their
Affiliates discovers or learns of information (from whatever source, including,
without limitation, the Partnership, its partners or any of their employees), or
any reports, instruments or other documentation which were reviewed by or made
available for review by BPECW LLC, Investor, Public Company or any of their
Affiliates in connection with the transactions contemplated hereby and/or by the
Master Transaction Agreement (including, without limitation, any reports,
surveys, and other due diligence documentation procured independently by BPECW
LLC, Investor, Public Company or any of their Affiliates in connection with the
transactions contemplated hereby) contain information that contradicts such
representation and warranty, or renders such representation and warranty untrue
or incorrect.

     5.5  Due Formation, Etc.  The Partnership is a limited partnership duly
          -------------------                                               
formed and existing under the laws of the State of California and is not
insolvent, and has all necessary power 

                                       15

 
and authority to execute and deliver this Agreement and all documents executed
by it in connection herewith and to perform all its obligations hereunder and
thereunder. This Agreement has been duly authorized by all requisite partnership
action on the part of the Partnership. The Partnership is not a Person other
than a United States Person within the meaning of the Code and the transactions
contemplated herein are not subject to the withholding provisions of section
3406 or subchapter A of Chapter 3 of the Code. The Partnership conducts business
in accordance with all statutes, laws, rules and regulations applicable to it,
and does not violate or fail to comply with, any statutes, laws, rules or
regulations applicable to it that would have a material adverse effect on the
business or operations of the Partnership or the Property or on the Investor's
ability to obtain any financing necessary to close the transactions contemplated
hereby or by the Master Transaction Agreement.

     5.6  Securities Laws.  Subject to the provisions of this Agreement, each of
          ---------------                                                       
the Partnership and each Partner hereby represents and warrants that it is
acquiring the Investor Preferred Units for its own account and not with a view
to or for sale in connection with any distribution thereof within the meaning of
the Securities Act.  The Partnership and each Partner understand that the
Investor Preferred Units and Investor Common Units that may be upon conversion
of Investor Preferred Units (and, subject to the Registration Rights Agreement,
the Shares that may be issued in lieu of redemption Investor Common Units) will
not be registered under the Securities Act or any state securities laws, will be
offered and sold pursuant to exemptions therefrom and cannot be resold without
registration thereunder or exemption therefrom.  Each of the Partnership and
each Partner represents that it has sufficient knowledge and experience in
financial and business matters to enable it to evaluate the merits and risks of
investment in the Investor Preferred Units and Investor Common Units that may be
issued upon conversion of Investor Preferred Units (and the Shares that may be
issued in lieu of redemption of Investor Common Units).  The Partnership and
each Partner have the ability to bear the economic risk of acquiring the
Investor Preferred Units and have been supplied with, or had access to,
information to which a reasonable investor would attach significance in making
investment decisions, including, but not limited to, all information as they
have requested, to answer all of their inquiries about Public Company, and to
enable them to make their decision to acquire the Investor Preferred Units and
the Investor Common Units that may be issued upon conversion of Investor
Preferred Units (and the Shares that may be issued in lieu of redemption of
Investor Common Units).  The Securities shall, if represented by certificates,
contain a prominent legend with respect to the foregoing restrictions.  Each of
the Partnership and each Partner further represents and warrants that it is an
"accredited investor" as such term is defined in Rule 501 under the Securities
Act.

                                       16

 
                                   ARTICLE 6

               REPRESENTATIONS AND WARRANTIES OF PUBLIC COMPANY
               ------------------------------------------------

      6.1 General Statement.  Public Company hereby makes the representations
          -----------------                                                  
and warranties to the Partnership and Prudential Partners which are set forth in
this Article 6.  All representations and warranties set forth in Section 6.4
     ---------                                                   -----------
shall survive the Closing (and none shall merge into any instrument of
conveyance) for the period of any relevant statute of limitations therefor.
Representations and warranties of Public Company are made as of the date of this
Agreement.

      6.2 Attribution.  For purposes of the representations and warranties of
          -----------                                                        
Public Company set forth in this Article 6 only, the words "knowledge of Public
                                 ---------                                     
Company" or "Public Company's knowledge" shall mean the actual and not
constructive knowledge of Mortimer Zuckerman, Edward Linde and Thomas O'Connor
(collectively, the "PUBLIC COMPANY KNOWLEDGE PARTIES"). The Public Company
Knowledge Parties shall have no liability hereunder of any kind.  Any fact,
matter or other statement shall not be deemed to be within the knowledge of
Public Company or Public Company's knowledge unless the Public Company Knowledge
Parties, or any of them, have actual knowledge of such fact, matter or other
statement.  Notwithstanding the foregoing, the representations and warranties
made by Public Company under Section 6.4 below are intended to be absolute in
                             -----------                                     
nature and are not limited by the knowledge or attribution limitations of this
Section 6.2.
- ----------- 

      6.3 Representations and Warranties Re: Public Company Business and
          --------------------------------------------------------------
Operations. Public Company hereby represents and warrants as follows:
- ----------                                                           

          6.3.1  Public Company is organized and, to Public Company's knowledge,
     has conducted its business in accordance with applicable laws, to the
     extent applicable, the failure or the violation of which would reasonably
     be expected to have a material adverse effect on the results of operations
     of the Public Company.

          6.3.2  There are no actions, suits or proceedings pending and, to
     Public Company's knowledge, no such proceedings are threatened or
     contemplated by governmental authorities or others, which would reasonably
     be expected to either (i) question the validity of this Agreement or the
     consummation of the transactions contemplated hereby, the issuance of the
     Shares that may be issued in lieu of redemption of Investor Common Units
     that may be issued upon conversion of Investor Preferred Units, any other
     agreements contemplated hereby or any actions taken pursuant to any of the
     foregoing or (ii) result in any material adverse change in the condition,
     financial or otherwise, or in the earnings, business affairs, management or
     business prospects of Public Company. As of the date hereof, there is no
     action or suit against Public Company pending or threatened by any Person
     which would reasonably be expected to have a material adverse effect on
     Public Company.

                                       17

 
          6.3.3  The Public Company has filed with the Securities and Exchange
     Commission (the "COMMISSION") all reports required by the Exchange Act to
     be filed by the Company (collectively, and in each case including all
     exhibits and schedules thereto and documents incorporated by reference
     therein, the "SEC DOCUMENTS").  As of their respective filing dates (or if
     amended, revised or superseded by a subsequent filing with the Commission,
     then on the date of such subsequent filing), the SEC Documents complied in
     all material respects with the requirements of the Securities Act or the
     Exchange Act, as the case may be, and none of the SEC Documents (including
     any and all financial statements included therein) as of such dates
     contained any untrue statement of a material fact or omitted to state a
     material fact required to be stated therein or necessary in order to make
     the statements therein, in light of the circumstances under which they are
     made, not misleading.  The consolidated financial statements of Public
     Company included in all SEC Documents, including any amendments thereto,
     comply as to form in all material respects with applicable accounting
     requirements and the published rules and regulations of the Commission with
     respect thereto.  Since the most recently filed SEC Document, there has not
     occurred or arisen any change in or event affecting Public Company that has
     had or would reasonably be expected to have a material adverse effect on
     the results of operations of Public Company.

          6.3.4  No proceeding or other action has been commenced or undertaken
     relating to the dissolution or merger of Public Company and none is
     presently contemplated except that this representation shall not apply to
     any merger of another entity with and into Public Company that meets the
     criteria of Section 251(f) of the Delaware General Corporation Law for
     consummating a merger without a vote of stockholders.

          6.3.5  As of the date of this Agreement, the authorized capital
     securities of Public Company consists of Preferred Stock, $.01 par value,
     50,000,000 Shares authorized, none issued or outstanding, Excess Stock,
     $.01 par value, 150,000,000 shares authorized, none issued or outstanding,
     and 250,000,000 Shares of common stock, $0.01 par value per share, of which
     63,526,785 Shares are currently issued and outstanding.  Except as
     contemplated pursuant to this Agreement, and except for (i) any Shares that
     may be issued in lieu of redemption of outstanding units of limited
     partnership in Investor and (ii) any Shares or units of limited partnership
     in Investor which may be issued in accordance with agreements that have
     been described in or filed with the SEC Filings or otherwise disclosed on
     Exhibit F, there are no securities convertible or exchangeable for Shares
     ---------                                                                
     or any rights or options to subscribe for or purchase any Shares or
     securities convertible or exchangeable for Shares.  All of the outstanding
     Shares have been duly and validly authorized and issued and are fully paid
     and non-assessable.  All of the outstanding Shares have been issued in
     compliance with all applicable federal and state securities laws.

                                       18

 
          6.3.6   The Shares that may be issued in lieu of redemption of
     Investor Common Units that may be issued upon conversion of Preferred Units
     issuable hereunder, when issued in accordance with the provisions of this
     Agreement and the Investor Agreement, will be duly and validly authorized
     and issued and will be fully paid and non-assessable. Neither Public
     Company, Investor nor any Person acting on their behalf has taken or will
     take any action which would subject the issuance of the Investor Preferred
     Units to the Partnership to the registration requirements of Section 5 of
     the Securities Act.

          6.3.7   Except as provided in Exhibit F, Public Company has no 
                                      ---------  
     obligation (contingent or other) to purchase, redeem or otherwise acquire
     any of its Shares or any interest therein or to pay any dividend or make
     any other distribution in respect thereof (except for any distribution that
     was declared prior to the date hereof and not paid on or before the date
     hereof). Public Company has authorized and reserved for issuance a
     sufficient number of Shares to satisfy its obligations under this Agreement
     and the Investor's Investor Agreement.

          6.3.8   Public Company has duly and timely filed with the appropriate
     governmental authorities all Tax Returns required to be filed by it for all
     periods ending on or prior to the Closing Date, except to the extent of any
     Tax Return for which an extension of time for filing has been properly
     filed.  Each such Tax Return is true and correct in all material respects.
     All Taxes owed by Public Company have been paid (whether or not shown on a
     Tax Return).  All Taxes which Public Company is required by law to withhold
     or collect, including, without limitation, Taxes required to have been
     withheld in connection with amounts paid or owing to any employee,
     independent contractor, creditor, partner, or other third party and sales,
     gross receipts and use taxes, have been duly withheld or collected and, to
     the extent required, have been paid over to the proper governmental
     authorities or are held in separate bank accounts for such purpose.  There
     are no liens for Taxes upon the assets of Public Company except for
     statutory liens for Taxes not yet due.

          6.3.9   Public Company has not filed for an extension of a statute of
     limitations with respect to any Taxes and no governmental authorities have
     requested an extension of the statute of limitations with respect to any
     Taxes.  Public Company is not a party to any pending action or any formal
     or informal proceeding by any taxing authority for a deficiency, assessment
     or collection of Taxes, and no claim of any deficiency, assessment or
     collection of Taxes has been asserted or, to the knowledge of Public
     Company, threatened against it, including claims by any taxing authority in
     a jurisdiction where Public Company does not file Tax Returns that it is or
     may be subject to taxation in that jurisdiction.

          6.3.10  Public Company is organized and has operated from its
     commencement through the date hereof in such a manner so as to qualify for
     taxation as a real estate investment trust under the Code, and Public
     Company intends to operate in such a manner so as to qualify and to
     continue to so qualify as a real estate investment trust.

                                       19

 
          6.3.11  Public Company does not hold "plan assets" within the meaning
     of 29 C.F.R. Section 2510.3-101.

      6.4 Due Organization, Etc. of Public Company.
          ---------------------------------------- 

          6.4.1  Public Company is a corporation duly organized, validly
     existing and in good standing under the laws of the State of Delaware, is
     (or prior to the Closing will be) duly qualified and in good standing as a
     foreign corporation under the laws of the State of California, and has all
     necessary power, corporate and otherwise, to execute and deliver this
     Agreement and all other documents and instruments to be executed and
     delivered by Public Company in connection herewith and to perform all its
     obligations hereunder and thereunder. This Agreement has been duly
     authorized by all requisite corporate action on the part of Public Company.
     The execution and delivery of this Agreement and the other documents and
     instruments to be executed and delivered by Public Company in connection
     with the transactions described herein, and the consummation of the
     transactions contemplated hereby and thereby, do not require the consent or
     approval of the shareholders of Public Company or, to the knowledge of
     Public Company, the consent or approval of any governmental authority, nor,
     to the knowledge of Public Company, does the execution and delivery of this
     Agreement violate, in any way material to the transactions contemplated
     hereby, any contract or agreement to which Public Company is a party or any
     governmental or judicial order, judgment, decree, statute, law, rule or
     regulation applicable to Public Company, and this Agreement and all
     documents and other instruments to be executed and delivered by Public
     Company in connection herewith constitute the legal, valid and binding
     obligations of Public Company.

          6.4.2  Public Company is not a party to, or bound by, any unexpired,
     undischarged or unsatisfied contract, agreement, indenture, mortgage,
     debenture, note or other instrument under the terms of which performance by
     Public Company according to the terms of this Agreement will be a default
     or an event of acceleration, or grounds for termination, or whereby timely
     performance by Public Company, according to the terms of this Agreement,
     may be prohibited, prevented or delayed.

                                   ARTICLE 7

           REPRESENTATIONS AND WARRANTIES OF INVESTOR AND BPECW LLC
           --------------------------------------------------------

      7.1 General Statement.  Investor and BPECW LLC hereby make the
          -----------------                                         
representations and warranties to the Partnership and the Prudential Partners
which are set forth in this Article 7. All representations and warranties set
                            ---------                                        
forth in Sections 7.4 and 7.5 shall survive the Closing (and none shall merge
         ------------     ---                                                
into any instrument of conveyance) for the period of any relevant statute of
limitations therefor.  Representations and warranties of Investor and BPECW LLC
are made as of the date of this Agreement.

                                       20

 
      7.2 Attribution.  For purposes of the representations and warranties of
          -----------                                                        
Investor and BPECW LLC set forth in this Article 7 only, the words "knowledge of
                                         ---------                              
Investor" or "knowledge of BPECW LLC" or "Investor's knowledge" or "BPECW LLC's
knowledge" shall mean the actual and not constructive knowledge of Mortimer
Zuckerman, Edward Linde and Thomas O'Connor (collectively, the "INVESTOR/BPECW
LLC KNOWLEDGE PARTIES").  The Investor/BPECW LLC Knowledge Parties shall have no
liability hereunder of any kind.  Any fact, matter or other statement shall not
be deemed to be within the knowledge of Investor or BPECW LLC or Investor's or
BPECW LLC's knowledge unless the Investor/BPECW LLC Knowledge Parties, or any of
them, have actual knowledge of such fact, matter or other statement.
Notwithstanding the foregoing, the representations and warranties made by
Investor under Section 7.4 below are intended to be absolute in nature and are
               -----------                                                    
not limited by the knowledge or attribution limitations of this Section 7.2.
                                                                ----------- 

      7.3 Representations and Warranties Re: Investor Business and Operations.
          -------------------------------------------------------------------  
Investor hereby represents and warrants as follows:

          7.3.1  Investor is organized and, to Investor's knowledge, has
     conducted its business in accordance with all applicable laws, to the
     extent applicable, the failure or the violation of which would reasonably
     be expected to have a material adverse effect on the results of operations
     of Investor.

          7.3.2  There are no actions, suits or proceedings pending and, to
     Investor's knowledge, no such proceedings are threatened or contemplated by
     governmental authorities or by others, which would reasonably be expected
     to either (i) question the validity of this Agreement or the consummation
     of the transactions contemplated hereby or the issuance of the Investor
     Preferred Units contemplated hereby, any other agreements contemplated
     hereby or any actions taken pursuant to any of the foregoing or (ii) result
     in any material adverse change in the condition, financial or otherwise, or
     in the earnings, business affairs, management or business prospects of
     Investor.  As of the date hereof, there is no material action or suit
     against Investor pending or threatened by any Person.

          7.3.3  No proceeding or other action has been commenced or undertaken
     relating to the dissolution or merger of Investor (except in connection
     with an acquisition of property for units in Investor in which Investor is
     the surviving party in the merger) and none is presently contemplated.

          7.3.4  Investor has duly and timely filed with the appropriate
     governmental authorities all Tax Returns required to be filed by it for all
     periods ending on or prior to the Closing Date, except to the extent of any
     Tax Return for which an extension of time for filing has been properly
     filed.  Each such Tax Return is true and correct in all material respects.
     All Taxes owed by Investor have been paid (whether or not shown on a Tax
     Return).  All Taxes which Investor is required by law to withhold or
     collect, including, without limitation, Taxes required to have been
     withheld in connection with amounts paid 

                                       21

 
     or owing to any employee, independent contractor, creditor, partner, or
     other third party and sales, gross receipts and use taxes, have been duly
     withheld or collected and, to the extent required, have been paid over to
     the proper governmental authorities or are held in separate bank accounts
     for such purpose. There are no liens for Taxes upon the assets of Investor
     except for statutory liens for Taxes not yet due.

          7.3.5  Investor has not filed for an extension of a statute of
     limitations with respect to any Taxes and no governmental authorities have
     requested an extension of the statute of limitations with respect to any
     Taxes.  Investor is not a party to any pending action or any formal or
     informal proceeding by any taxing authority for a deficiency, assessment or
     collection of Taxes, and no claim of any deficiency, assessment or
     collection of Taxes has been asserted or, to the knowledge of Investor,
     threatened against it, including claims by any taxing authority in a
     jurisdiction where Investor does not file Tax Returns that it is or may be
     subject to taxation in that jurisdiction.

          7.3.6  Investor is not, and will not become, a "publicly traded
     partnership" within the meaning of Section 7704 of the Code.

          7.3.7  Investor does not hold "plan assets" within the meaning of 29
     C.F.R. Section 2510.3-101.

          7.3.8  Investor is the sole member of BPECW LLC and has directed the
     Partnership to transfer the Property to BPECW LLC as a contribution to
     Investor in exchange for the Investor Preferred Units.

      7.4 Due Formation, Etc. of Investor.  Investor is a limited partnership
          -------------------------------                                    
duly formed and in good standing under the laws of the State of Delaware, is (or
prior to Closing will be) duly qualified and in good standing as a foreign
limited partnership under the laws of the State of California, and has all
necessary power, partnership and otherwise, to execute and deliver this
Agreement and all other documents and instruments to be executed and delivered
by Investor in connection herewith and to perform all its obligations hereunder
and thereunder.  This Agreement has been duly authorized by all requisite
partnership action on the part of Investor.  The execution and delivery of this
Agreement and the other documents and instruments to be executed and delivered
by Investor in connection with the transactions described herein, and the
consummation of the transactions contemplated hereby and thereby, do not require
the consent or approval of the partners of Investor or, to the knowledge of
Investor, the consent or approval of any governmental authority, nor, to the
knowledge of Investor, does the execution and delivery of this Agreement
violate, in any way material to the transactions contemplated hereby, any
contract or agreement to which Investor is a party or any governmental or
judicial order, judgment, decree, statute, law, rule or regulation applicable to
Investor, and this Agreement and all documents and other instruments to be
executed and delivered by Investor in connection herewith constitute the legal,
valid and binding obligations of Investor.  Investor is not a party to, or bound
by, any unexpired, undischarged or unsatisfied contract, agreement, indenture,
mortgage, debenture, note or other

                                       22

 
instrument under the terms of which performance by Investor according to the
terms of this Agreement will be a default or an event of acceleration, or
grounds for termination, or whereby timely performance by Investor, according to
the terms of this Agreement, may be prohibited, prevented or delayed.

      7.5 Due Organization, Etc. of BPECW LLC.
          ----------------------------------- 

          7.5.1  BPECW LLC is a limited liability company duly organized,
     validly existing and in good standing under the laws of the State of
     Delaware, is (or prior to the Closing will be) duly qualified and in good
     standing as a foreign limited liability company under the laws of the State
     of California, and has all necessary power, corporate and otherwise, to
     execute and deliver this Agreement and all other documents and instruments
     to be executed and delivered by BPECW LLC in connection herewith and to
     perform all its obligations hereunder and thereunder. This Agreement has
     been duly authorized by all requisite action on the part of BPECW LLC's
     member. The execution and delivery of this Agreement and the other
     documents and instruments to be executed and delivered by BPECW LLC in
     connection with the transactions described herein, and the consummation of
     the transactions contemplated hereby and thereby, do not require the
     consent or approval of the member of BPECW LLC or, to the knowledge of
     BPECW LLC, the consent or approval of any governmental authority, nor, to
     the knowledge of BPECW LLC, does the execution and delivery of this
     Agreement violate, in any way material to the transactions contemplated
     hereby, any contract or agreement to which BPECW LLC is a party or any
     governmental or judicial order, judgment, decree, statute, law, rule or
     regulation applicable to BPECW LLC, and this Agreement and all documents
     and other instruments to be executed and delivered by BPECW LLC in
     connection herewith constitute the legal, valid and binding obligations of
     BPECW LLC.

          7.5.2  BPECW LLC is not a party to, or bound by, any unexpired,
     undischarged or unsatisfied contract, agreement, indenture, mortgage,
     debenture, note or other instrument under the terms of which performance by
     BPECW LLC according to the terms of this Agreement will be a default or an
     event of acceleration, or grounds for termination, or whereby timely
     performance by BPECW LLC, according to the terms of this Agreement, may be
     prohibited, prevented or delayed.

          7.5.3  Investor is the sole member of BPECW LLC.


                                   ARTICLE 8

                                  LIMITATIONS
                                  -----------

      8.1 Limitations.  Except for the representations and warranties set forth
          -----------                                                          
in Sections 5.3, 6.3 and 7.3 above (which shall survive the Closing until a date
   ------------  ---     ---                                                    
(the "LIMITATION DATE") which is

                                       23

 
twelve (12) months after the Closing Date) all representations and warranties
shall survive the Closing without any time limit other than those limits imposed
by the applicable statute of limitations or other similar laws. The contractual
limitation on the Partnership's rights set forth in the preceding sentence shall
not constitute a waiver or release by the Partnership of its rights under
Federal Securities Laws. Notwithstanding the foregoing, the non-breaching
party(ies) shall have the right to commence or prosecute against the breaching
party(ies) any claim for the breach of a representation or warranty under 
Sections 5.3, 6.3 and 7.3 relating to events or occurrences which occurred 
- ------------  ---     ---
prior to the Limitation Date, provided such claim is actually filed no later
than forty-five (45) days after the Limitation Date, and otherwise no action
based thereon shall be commenced after the Closing Date. The representations and
warranties of the parties made in this Agreement are personal to the other
parties hereto and no Person other than a named party hereto shall be entitled
to bring any action based thereon. The representations and warranties set forth
above are further subject to the limitations of liability set forth in Section 
                                                                       -------
11.1 hereof and Article 12 of the Master Transaction Agreement, which 
- ----
limitations are in addition to (and not in lieu of) the limitations set forth in
this Agreement.


                                   ARTICLE 9

                                   COVENANTS
                                   ---------

      9.1 Confidentiality.
          --------------- 

          9.1.1  As used herein, "CONFIDENTIAL MATERIAL" means, with respect to
any party hereto (the "PROVIDING PARTY"), all information, whether oral, written
or otherwise, furnished to another party hereto (the "RECEIVING PARTY") or the
Receiving Party's directors, officers, partners, Affiliates, employees or
agents, or their respective representatives (collectively, "REPRESENTATIVES"),
by the Providing Party and all reports, analyses, compilations, studies and
other material prepared by the Receiving Party or its Representatives (in
whatever form maintained, whether documentary, computer storage or otherwise)
containing, reflecting or based upon, in whole or in part, any such information.
The term "CONFIDENTIAL MATERIAL" does not include information which (i) is or
becomes generally available to the public other than as a result of a disclosure
by the Receiving Party, its Representatives or anyone to whom the Receiving
Party or any of its Representatives transmit any Confidential Material in
violation of this Agreement or (ii) is or becomes known or available to the
Receiving Party on a nonconfidential basis from a source (other than the
Providing Party or one of its Representatives) who is not, to the knowledge of
the Receiving Party, prohibited from transmitting the information to the
Receiving Party or its Representatives by a contractual, legal, fiduciary or
other obligation.

          9.1.2  Subject to Section 9.1.3 below or except as required by
                            -------------                               
applicable laws, regulations or legal process as reasonably interpreted by
Public Company, the Confidential Material will be kept confidential and will
not, without the prior written consent of the Providing Party, be disclosed by
the Receiving Party or its Representatives, in whole or in part, and will not

                                       24

 
be used by the Receiving Party or its Representatives, directly or indirectly,
for any purpose other than in connection with this Agreement, the other
Transaction Documents and the transactions contemplated hereby or thereby or
evaluating, negotiating or advising with respect to such matters.
Notwithstanding anything to the contrary herein, the Receiving Party has the
right to transmit Confidential Material to its Representatives only if and to
the extent that such Representatives need to know the Confidential Material for
purposes of such transactions and are informed by the Receiving Party of the
confidential nature of the Confidential Material and of the terms of this
Section 9.1.2. Notwithstanding the foregoing, each of  Public Company, Investor,
- -------------
BPECW LLC, the Partnership and the Prudential Partners shall have the right to
disclose such Confidential Material to its actual or proposed financing and
capital sources and their respective representatives, provided that, prior to
disclosing such information to such Persons, as the case may be, it advises such
Persons of the confidential nature of such Confidential Information and causes
to be affixed to such Confidential Information and requires that such
Information be used only for the purposes specified by the parties hereto in
connection with the transactions contemplated by this Agreement and/or the
Master Transaction Agreement. In any event, the Receiving Party will be
responsible for any actions by its Representatives (and any other Person to whom
such Confidential Material is conveyed in accordance with the provisions hereof)
which are not in accordance with the provisions hereof.

          9.1.3  In the event that the Receiving Party, its Representatives or
anyone to whom the Receiving Party or its Representatives supply the
Confidential Material are requested (by oral questions, interrogatories,
requests for information or documents, subpoena, civil or criminal investigative
demand, any informal or formal investigation by any government or governmental
agency or authority or otherwise in connection with legal process) to disclose
any Confidential Material, the Receiving Party agrees (i) to immediately notify
the Providing Party of the existence, terms and circumstances surrounding such a
request, (ii) to consult with the Providing Party on the advisability of taking
legally available steps to resist or narrow such request, and (iii) if
disclosure of such information is required, to furnish only that portion of the
Confidential Material which, in the opinion of the Receiving Party's counsel,
the Receiving Party is legally compelled to disclose and to cooperate with any
action by the Providing Party to obtain an appropriate protective order or other
reliable assurance that confidential treatment will be accorded the Confidential
Material (it being agreed that the Providing Party shall reimburse the Receiving
Party for all reasonable out-of-pocket expenses incurred by the Receiving Party
in connection with such cooperation).

          9.1.4  In the event of the termination of this Agreement in accordance
with its terms, promptly upon request from the Providing Party, the Receiving
Party shall, except to the extent prohibited by applicable laws, regulations or
legal process, redeliver to the Providing Party or destroy all tangible
Confidential Material and will not retain any copies, extracts or other
reproductions thereof in whole or in part.  Any such destruction shall be
certified in writing to the Providing Party by an authorized officer of the
Receiving Party supervising the same.

                                       25

 
      9.2 Public Statements.  The parties hereto shall consult with each other
          -----------------                                                   
prior to issuing any press release or any written public statement with respect
to this Agreement or the transactions contemplated hereby and, except as shall
be required by applicable law or the rules or regulations of any securities
exchange, shall not issue any such press release or written public statement
prior to review and approval by the other parties, it being understood that such
approval will not be unreasonably withheld or delayed.

      9.3 Survival.  The covenants in this Article 9 shall survive the Closing.
          --------                         ---------                           


                                  ARTICLE 10

                                    CLOSING
                                    -------

      10.1 Closing Deliveries.
           ------------------ 

          10.1.1  Closing.  As used herein, the term "CLOSING" shall mean the
                  -------
consummation of all transactions contemplated in this Agreement as provided in
Sections 10.1.2 and 10.1.3 below.
- ---------------     ------       

          10.1.2  Closing Deliveries of the Partnership.  On the date hereof, 
                  -------------------------------------     
the Partnership is hereby concurrently delivering to BPECW LLC, Investor and/or
the Public Company, or causing to be delivered to the Escrow Agent, the
following:

                  (a) Deed.  A grant deed in the form of Exhibit G attached 
                      ----                               ---------  
          hereto and incorporated herein by this reference, conveying to BPECW
          LLC all of the Partnership's undivided tenancy-in-common right, title
          and interest in and to the Real Property, subject only to the
          Permitted Exceptions ("DEED").

                  (b) Bill of Sale.  A bill of sale in the form of Exhibit H
                      ------------                                 ---------
          attached hereto and incorporated herein by this reference, conveying
          to BPECW LLC all of the Partnership's undivided tenancy-in-common
          right, title and interest in and to the Personal Property.

                  (c) Assignment of Tenant Leases.  An assignment and 
                      ---------------------------
          assumption of leases in the form of Exhibit I attached hereto and
                                              ---------
          incorporated herein by this reference ("ASSIGNMENT OF LEASES"),
          transferring to BPECW LLC all of the Partnership's undivided tenancy-
          in-common interest in the Leases encumbering the Property on the date
          hereof described on Exhibit E attached hereto and incorporated herein
                              ---------
          by this reference and any amendments, guarantees and other documents
          relating thereto (herein collectively called the "LEASES"), together
          with all assignable non-cash security deposits deposited by the
          tenants thereunder and not applied by the Partnership in accordance
          with the terms of such Leases.

                                       26

 
               (d) Assignment of Equipment Leases and Service Contracts.  An
                   ----------------------------------------------------     
          assignment and assumption of equipment leases, service contracts,
          warranties and guaranties and the Other Property Rights (to the extent
          the same are not transferred by Deed, Bill of Sale or Assignment of
          Leases) in the form of Exhibit J attached hereto and incorporated
                                 ---------                                 
          herein by this reference ("ASSIGNMENT OF CONTRACTS"), transferring to
          BPECW LLC, to the extent assignable, without liability or expense to
          the Partnership, all of the Partnership's undivided tenancy-in-common
          interest in the equipment leases in effect at the Property on the date
          hereof, contracts described on Exhibit B, warranties and guaranties
                                         ---------                           
          which remain in effect on the date hereof and any Other Property
          Rights not otherwise transferred to BPECW LLC (all of the foregoing
          being herein collectively called the "ASSIGNED CONTRACTS").  The
          Partnership shall not assign any existing policies of insurance for
          the Property, and the Partnership shall terminate the management
          agreement for the Property on or before the date hereof.

               (e) Notices to Tenants.  A single form letter in the form of
                   ------------------                                      
          Exhibit K attached hereto and incorporated herein by this reference to
          ---------                                                             
          each tenant under the Leases, duplicate copies of which will be sent
          on or promptly after the date hereof notifying it of the transfer of
          the Property to BPECW LLC and advising it that all future payments of
          rent and other payments under the Leases are to be made to BPECW LLC
          at the address designated by BPECW LLC in such letter.

               (f) Non-Foreign Status Affidavit.  A non-foreign status affidavit
                   ----------------------------                                 
          in the form of Exhibit L attached hereto and incorporated herein by
                         ---------                                           
          this reference, as required by Section 1445 of the Internal Revenue
          Code.

               (g) Evidence of Authority.  (i) A certificate of each general
                   ---------------------                                    
          partner of the Partnership with respect to the authority to act on
          behalf of the Partnership to execute all documents contemplated by
          this Agreement and the authority of the individuals executing on
          behalf of the Partnership; and (ii) evidence of the organization,
          existence and authority of each Partner to enter into this Agreement
          and to consummate the transactions contemplated hereby, certified by
          an appropriate officer or partner of such Partner (together with an
          incumbency and signature certificate regarding the Person signing).

               (h) Property Documents.  (i) To the extent in the possession of
                   ------------------                                         
          the Partnership or PPS, (x) the original (or, if unavailable, a copy)
          of the existing certificate or certificates of occupancy for the
          Property, and (y) all originals (or, if unavailable, copies of)
          certificates, licenses, permits, authorizations and approvals issued
          for or with respect to the Property by governmental and quasi-
          governmental authorities having jurisdiction; and (ii) all books and
          records (excluding appraisals, budgets, the Partnership's and its
          partners' strategic plans for the Property, marketing information,
          submissions relating to the Partnership's

                                       27

 
          obtaining of corporate authorization, or other information in the
          possession or control of the Partnership, its partners or PPS prior to
          the date hereof and which is privileged, provided that inadvertent
          disclosure shall not constitute a waiver of any privilege) located at
          the Property or at the office of PPS relating to the Property and the
          ownership and operation thereof (the items described in clauses (i)
                                                                  -----------
          and (ii) being herein collectively called the "PROPERTY DOCUMENTS").
              ----      
           
               (i) Other Documents.  Such other documents as may be reasonably
                   ---------------                                            
          required by the Escrow Agent or as may be agreed upon by the
          Partnership and BPECW LLC to consummate the transactions contemplated
          by this Agreement.

               (j) Letters of Credit as Tenant Security Deposits.  With respect
                   ---------------------------------------------               
          to any security deposits which are letters of credit, the Partnership
          shall, if the same are assignable, (i) deliver to BPECW LLC on the
          date hereof such letters of credit, (ii) execute and deliver such
          other instruments as the issuers of such letters of credit shall
          reasonably require, and (iii) cooperate with BPECW LLC to change the
          named beneficiary under such letters of credit to BPECW LLC so long as
          the Partnership does not incur any additional liability or expense in
          connection therewith.

               (k) Keys and Original Documents.  Keys to all locks on the Real
                   ---------------------------                                
          Property (in the Partnership's or PPS's possession) and originals or,
          if originals are not available, copies, of the Leases and Assigned
          Contracts (unless canceled as set forth herein) encumbering the
          Property on the date hereof.

               (l) Transfer Taxes.  If applicable, duly completed and signed
                   --------------                                           
          real estate transfer tax forms (i.e., Preliminary Change of Ownership
                                          ----                                 
          Reports).

               (m) Investor Agreement.  The Investor Agreement in the form of
                   ------------------                                        
          Exhibit M attached hereto (the "INVESTOR AGREEMENT"), executed by the
          ---------                                                            
          Partnership.

               (n) Registration Rights Agreement.  The Registration Rights
                   -----------------------------                          
          Agreement in the form of Exhibit N attached hereto (the "REGISTRATION
                                   ---------                                   
          RIGHTS AGREEMENT"), executed by the Partnership.

               (o) Representation Letter.  A Representation Letter in the form
                   ---------------------                                      
          attached hereto as Exhibit O attached hereto executed by the
                             ---------                                
          Partnership indicating thereon that the Partnership is an "accredited
          investor".

               (p) Tax Reporting Agreement.  The Tax Reporting Agreement in the
                   -----------------------                                     
          form of Exhibit P attached hereto (the "TAX REPORTING AGREEMENT"),
                  ---------                                                 
          executed by the Partnership.

                                       28

 
          10.1.3  Closing Deliveries of BPECW LLC, Investor and/or Public 
                  -------------------------------------------------------
Company. On the date hereof, BPECW LLC, Investor and/or Public Company are
- -------
hereby concurrently delivering to the Partnership, or are causing to be
delivered to the Escrow Agent, the following:

                  (a) Assignment of Leases.  The Assignment of Leases executed 
                      --------------------    
          by BPECW LLC.

                  (b) Assignment of Equipment Leases and Service Contracts.  The
                      ----------------------------------------------------      
          Assignment of Contracts executed by BPECW LLC.

                  (c) Evidence of Authority.  Documentation to establish to the
                      ---------------------                                    
          Partnership's reasonable satisfaction the due authorization of BPECW
          LLC's acquisition of the Property and its signatories and Investor's
          delivery of the Contribution Units and documents required to be
          delivered by Investor pursuant to this Agreement.

                  (d) Other Documents.  Such other documents as may be 
                      ---------------      
          reasonably required by the Escrow Agent or may be agreed upon by the
          Partnership, BPECW LLC, Investor and Public Company to consummate the
          transactions contemplated by this Agreement.

                  (e) Transfer Taxes.  If applicable, duly completed and signed
                      --------------                                           
          real estate transfer tax forms (i.e., Preliminary Change of Ownership
                                          ----                                 
          Reports).

                  (f) Organization.  Evidence of the organization, existence and
                      ------------                                              
          authority of BPECW LLC, Public Company and Investor to enter into this
          Agreement and to consummate the transactions contemplated hereby,
          certified by an appropriate officer of BPECW LLC, Public Company or
          Investor, as appropriate (together with an incumbency and signature
          certificate regarding the officer(s) signing on their behalf).

                  (g) Investor Agreement.  The Investor Agreement executed by
                      ------------------                                     
          Public Company and any other partner whose execution is required by
          Investor's Investor Agreement, reflecting the issuance to the
          Partnership of the Investor Preferred Units in accordance with Section
                                                                         -------
          2.2 hereof.
          ---        

                  (h) Registration Rights Agreement.  The Registration Rights
                      -----------------------------                          
          Agreement, executed by Public Company.

                  (i) Tax Reporting Agreement.  The Tax Reporting Agreement,
                      -----------------------                               
          executed by the Partnership and Public Company.

                                       29

 
          10.1.4  Delivery of Deed.  Effective upon delivery of the Deed, actual
                  ----------------                                              
and exclusive possession (subject only to the Permitted Exceptions) and risk of
loss to the Property shall pass from the Partnership to BPECW LLC.

          10.1.5  Waiver of Failure of Conditions Precedent.  By closing the
                  -----------------------------------------                 
transactions contemplated by this Agreement, each party hereto shall be
conclusively deemed to have waived the benefit of any remaining unfulfilled
conditions precedent set forth in this Agreement and/or the Master Transaction
Agreement.

          10.1.6  Apportionment Credit.  The Contribution Value (and the amount
                  -------------------- 
of Contribution Units delivered to the Partnership) shall be adjusted to reflect
the prorations and other adjustments pursuant to and as provided in Exhibit V of
the Master Transaction Agreement.

          10.1.7  Delayed Adjustment.  Investor and the Partnership shall
                  ------------------                                     
administer the provisions of Exhibit V of the Master Transaction Agreement
following the Closing based on the closing of the Property's books for the
Closing Month.  If, as a result of the Final Audit to be conducted pursuant to
Exhibit V, the amount of an item listed in Exhibit V of the Master Transaction
Agreement shall prove to be incorrect (whether as a result of an error in
calculation or a lack of complete and accurate information as of the date
hereof), Investor and the Partnership shall adjust the Contribution Units
initially issued (proportionately to the Contribution Units initially issued) by
Investor delivering an amended schedule to the Investor Agreement as reasonably
agreed to by the Partnership reflecting the corrected number of Investor
Preferred Units issued to the Partnership in order to correct such error upon
receipt of reasonable proof of such error, provided that such proof is delivered
to the party from whom payment is requested within 90 days of the date hereof.
The correction of any such error shall be made effective as of the date hereof
and shall include the further payment by Investor, or repayment by the
Partnership, of any distributions made by Investor in respect of the increase,
or decrease, of the number of Contribution Units initially held by the
Partnership prior to such adjustment.

          10.1.8  Survivability.  The provisions of this Article 10 shall 
                  -------------                          ----------  
survive the Closing and not be merged therein for a period of six months after
the Closing or such longer period as may be necessary to complete the Final
Audit and make the adjustment described in Section 10.1.7.
                                           -------------- 

          10.1.9  Closing Costs.  The parties shall bear certain closing costs 
                  -------------
of the transactions contemplated hereby as set forth in Exhibit V of the Master
Transaction Agreement. Any other Closing costs not covered by Exhibit V of the
Master Transaction Agreement shall be allocated between the parties in
accordance with the local practice and custom in San Francisco, California.

                                       30

 
                                  ARTICLE 11

                       BREACH, DEFAULT, LIABILITY LIMITS
                       ---------------------------------

      11.1 Rights of Investor and Public Company.
           ------------------------------------- 

           11.1.1  In the event of any claim, suit or other action against the
Partnership or its Partners pertaining to (a) this Agreement, any of the
documents executed in connection herewith or any of the transactions
contemplated hereby or thereby (including, without limitation, any and all
indemnification obligations of the Partnership hereunder or thereunder) or (b) a
breach by the Partnership of any of the terms or provisions of this Agreement or
of any of the documents executed by the Partnership in connection with the
matters contemplated in this Agreement (including, without limitation, the
breach of any representation or warranty of the Partnership set forth herein or
therein), BPECW LLC's, Investor's and Public Company's sole remedy shall be an
action for monetary damages against the Partnership (or, only if the Partnership
has dissolved or does not hold sufficient Investor Preferred Units or other
Securities received in exchange therefor and/or cash to satisfy the judgment,
the Partners of the Partnership individually); provided that, except for the
                                               -------- ----                
breach of the representations and warranties set forth in Sections 5.3.1, 5.3.2,
                                                          --------------  ----- 
5.5 and 5.6 above (which will not be subject to any limitation on the amount of
- ---     ---                                                                    
such liability), and notwithstanding any provision to the contrary contained in
this Agreement, the Master Transaction Agreement or in any other documents
executed in connection herewith or therewith, the maximum aggregate liability of
the Partnership and its Partners, and the maximum aggregate amount which may be
awarded to and collected by BPECW LLC, Investor and Public Company or any other
Person, with respect to any claim, suit or other action relating to a breach of
a representation, covenant or indemnity of this Agreement, the Master
Transaction Agreement or any other documents executed in connection herewith or
therewith shall not exceed the Three ECW Building Maximum Liability Amount.
Each Partner's liability under this Agreement shall not exceed (x) an amount
equal to the Three ECW Building Maximum Liability Amount minus the sum of all
                                                         -----               
damages previously paid by, or concurrently being paid by, the Partnership,
multiplied by, (y) such partner's percentage interest in the Partnership
- ---------- --                                                           
immediately prior to the Closing. Notwithstanding the foregoing, the terms and
provisions of this Section 11.1.1 are further subject to the overall $43,000,000
                   --------------                                               
limitation of liability set forth in Section 12.1.2 of the Master Transaction
Agreement, it being acknowledged and agreed that the maximum liability caps
described hereinabove may be further reduced as a result of recoveries made by
BPECW LLC, Investor, Public Company or their Affiliates in connection with the
other transactions described in the Master Transaction Agreement in accordance
with said Section 12.1.2 of the Master Transaction Agreement.  Notwithstanding
the foregoing, the parties hereto hereby acknowledge and agree that the
foregoing limitations on the amount of liability (and any other cap on the
liability of the Partnership and/or its Partners set forth in any other
Transaction Document) does not apply to the breach of any of the representations
and warranties set forth in Sections 5.3.1, 5.3.2, 5.5 and 5.6 hereof.
                            --------------  -----  ---     ---        

                                       31

 
           11.1.2  Except as provided in the last sentence of this Section 
                                                                   -------
11.1.2, BPECW LLC's, Investor's and Public Company's sole recourse against the
- ------ 
Partnership and its Partners, individually and/or as a group, for liability
assumed by, and for any indemnity of or breach of representation or warranty
made by the Partnership shall be limited to the recovery by BPECW LLC, Investor
and/or Public Company of Investor Preferred Units (and any Securities received
in exchange therefor or upon conversion thereof) issued to the Partnership and
then held by the Partnership or any Partner, and none of the Partnership or any
of its Partners shall have any personal liability to pay any damages or other
amounts in cash in respect thereof, except to the extent that the Partnership
and its Partners collectively hold an insufficient amount of Investor Preferred
Units and Securities to satisfy the claim or judgment, in which event such
Person shall be obligated to pay any damages or other amounts not satisfied by
the transfer of Investor Preferred Units or Securities in cash.  The number of
Investor Preferred Units or Shares recoverable from the Partnership or the
Partners, as the case may be, in respect of any claim (or damages) to be
satisfied by such Person as provided in this Agreement shall be determined on a
full diluted basis as if converted by reference to the closing trading price of
the Public Company's common shares on the date of payment of the damages or
other amounts.

           11.1.3  Investor shall promptly give the Partnership notice of any
claim made by any third party which would reasonably be expected to result in
liability of the Partnership or any Partner in respect of a breach of a
representation made by the Partnership in this Agreement or otherwise and shall
give the Partnership and its Partners the opportunity to cure any alleged claim
and to defend against and settle all such claims at their sole cost. The failure
to give such notice, however, shall not relieve the Partnership of any
liabilities hereunder to the extent that it is not materially prejudiced as a
result thereof.

           11.1.4  The terms and provisions of this Section 11.1 shall survive 
                                                    ------------ 
the Closing and shall not be merged therein.

      11.2 Rights of Partnership.
           --------------------- 

           11.2.1  In the event of a breach by BPECW LLC, Investor or Public
Company of any of the terms or provisions of this Agreement or any of the
documents executed in connection herewith, the Partnership and Prudential
Partners shall be entitled to pursue any and all rights and remedies at law or
in equity available to the Partnership and/or its Partners with respect to such
breach; provided that, except for breaches of the representations and 
        -------- ----     
warranties set forth in Articles 6 and 7 (which will not be subject to any 
                        ----------     -       
liability cap), and except as otherwise expressly provided in any other
Transaction Document, the maximum aggregate liability of BPECW LLC, Investor and
Public Company for any and all breaches of the representations and warranties of
BPECW LLC, Investor and/or Public Company contained in any Transaction Document
shall not exceed an amount equal to Forty-Three Million Dollars ($43,000,000) in
the aggregate.

           11.2.2  The terms and provisions of this Section 11.2 shall survive 
                                                    ------------
the Closing and shall not be merged therein.

                                       32

 
                                  ARTICLE 12

                                 MISCELLANEOUS
                                 -------------

      12.1 Commissions.  The parties hereto each agree to indemnify, defend,
           -----------                                                      
protect and hold the others harmless from and against any and all commissions,
finder's and/or similar fees or compensation claimed by any broker or finder in
connection with the transactions described in this Agreement based on claimed
contacts with, or other acts or omissions of, such indemnifying party.  The
terms and provisions of this Section 12.1 shall survive the Closing or
                             ------------                             
termination of this Agreement.

      12.2 Expenses.  Except as otherwise expressly set forth herein or 
           --------  
expressly set forth in the Master Transaction Agreement, each party hereto shall
bear its own costs and expenses with respect to the transactions contemplated
hereby.

      12.3 Amendment.  This Agreement may be amended, modified or supplemented
           ---------                                                          
but only in writing signed by each of the parties hereto.

      12.4 Notices.  Any notice, request, instruction or other document to be
           -------                                                           
given hereunder by a party hereto shall be in writing and shall be deemed to
have been given, (a) when received if given in person or by courier or a courier
service, (b) on the date of transmission if sent by telex, facsimile or other
wire transmission or (c) three business days after being deposited in the U.S.
mail, certified or registered mail, postage prepaid:

           12.4.1  If to BPECW LLC, Public Company or Investor, addressed as
     follows:

           Boston Properties, Inc.
           8 Arlington Street
           Boston, Massachusetts 02116-3495
           Attention:  General Counsel
           Facsimile:  617-421-1555
           Telephone:  617-859-2600
         
           with a copy to:
         
           Goulston & Storrs, P.C.
           400 Atlantic Avenue
           Boston, Massachusetts 02110-3333
           Attention:  Eli Rubenstein, Esq.
           Facsimile:  617-574-4112
           Telephone:  617-482-1776
         

                                       33

 
           12.4.2  If to the Partnership, addressed as follows:
         
           Prudential Realty Group
           8 Campus Drive
           4th Floor - Arbor Circle South
           Parsippany, New Jersey 07054
           Attention:  John R. Triece
           Facsimile:  (201) 683-1797
         
           with a copy to:
         
           The Prudential Insurance Company
           of America
           c/o Prudential Capital Group
           Four Embarcadero Center
           Suite 2700
           San Francisco, California 94111
           Attention:  Harry Mixon, Esq.
           Facsimile:  (415) 956-2197
         
           and a copy to:
         
           O'Melveny & Myers LLP
           Embarcadero Center West
           275 Battery Street
           San Francisco, California 94111
           Attention:  Stephen A. Cowan, Esq.
           Facsimile:  (415) 984-8701

or to such other individual or address as a party hereto may designate for
itself by notice given as herein provided.

      12.5 Waivers.  The failure of a party hereto at any time or times to
           -------                                                        
require performance of any provision hereof shall in no manner affect its right
at a later time to enforce the same.  No waiver by a party of any condition or
of any breach of any term, covenant, representation or warranty contained in
this Agreement shall be effective unless in writing, and no waiver in any one or
more instances shall be deemed to be a further or continuing waiver of any such
condition or breach in other instances or a waiver of any other condition or
breach of any other term, covenant, representation or warranty.

      12.6 Counterparts.  This Agreement may be executed in counterparts, each 
           ------------
of which shall be deemed an original, but all of which together shall constitute
one and the same instrument.

                                       34

 
      12.7  Interpretation.  The headings preceding the text of Articles and
            --------------                                                  
Sections included in this Agreement and the headings to Exhibits and Schedules
attached to this Agreement are for convenience only and shall not be deemed part
of this Agreement or be given any effect in interpreting this Agreement.  The
use of the masculine, feminine or neuter gender herein shall not limit any
provision of this Agreement.  The use of the term "including" or "include" shall
in all cases herein mean "including, without limitation" or "include, without
limitation," respectively.  Underscored references to Articles, Sections,
Subsections, Exhibits or Schedules shall refer to those portions of this
Agreement.

      12.8  Governing Law.  THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN
            -------------                                                       
ACCORDANCE WITH THE LAWS OF THE STATE OF CALIFORNIA.

      12.9  Assignment.  This Agreement shall be binding upon and inure to the
            ----------                                                        
benefit of the parties hereto and their respective successors and assigns.  No
assignment of any rights or obligations shall be made by any party without the
written consent of each other party.

      12.10 No Third Party Beneficiaries.  This Agreement is solely for the
            ----------------------------                                   
benefit of the parties hereto and, to the extent provided herein, their
respective Representatives, and no provision of this Agreement shall be deemed
to confer upon other third parties any remedy, claim, liability, reimbursement,
cause of action or other right.

      12.11 Further Assurances.  Upon reasonable request of any party, each 
            ------------------    
other party will execute and deliver such other documents, releases, assignments
and other instruments as may be required to effectuate completely the transfer
and assignment to Investor of the Property and to issue the Investor Preferred
Units, Investor Common Units and the Shares and to otherwise carry out the
purposes of this Agreement.

      12.12 Severability.  If any provision of this Agreement shall be held
            ------------                                                   
invalid, illegal or unenforceable, the validity, legality or enforceability of
the other provisions hereof shall not be affected thereby, and there shall be
deemed substituted for the provision at issue a valid, legal and enforceable
provision as similar as possible to the provision at issue.

      12.13 Remedies Cumulative.  The remedies provided in this Agreement shall
            -------------------  
be cumulative and shall not preclude the assertion or exercise of any other
rights or remedies available by law, in equity or otherwise.

      12.14 Entire Understanding.  This Agreement, together with the other
            --------------------                                          
Transaction Documents, sets forth the entire agreement and understanding of the
parties hereto with respect to the matters set forth herein and supersedes any
and all prior agreements, arrangements and understandings among the parties.

      12.15 Consent to Jurisdiction and Service of Process.  ALL JUDICIAL
            ----------------------------------------------               
PROCEEDINGS BROUGHT AGAINST ANY PERSON ARISING OUT OF OR RELATING 

                                       35

 
TO THIS AGREEMENT MAY BE BROUGHT IN ANY STATE OR FEDERAL COURT OF COMPETENT
JURISDICTION IN THE STATE OF CALIFORNIA, AND BY EXECUTION AND DELIVERY OF THIS
AGREEMENT EACH PARTY HERETO ACCEPTS FOR ITSELF, GENERALLY AND UNCONDITIONALLY,
THE NONEXCLUSIVE JURISDICTION OF THE AFORESAID COURTS AND WAIVES ANY DEFENSE OF
FORUM NON CONVENIENS AND IRREVOCABLY AGREES TO BE BOUND BY ANY JUDGMENT RENDERED
THEREBY IN CONNECTION WITH THIS AGREEMENT. Each party hereby agrees that service
of all process in any such proceeding in any such court may be made by
registered or certified mail, return receipt requested, to any other party
hereto, at its address provided in this Agreement, such service being hereby
acknowledged by each party to be sufficient for personal jurisdiction in any
action against such party in any such court and to be otherwise effective and
binding service in every respect. Nothing herein shall affect the right to serve
process in any other manner permitted by law.

      12.16 Waiver of Jury Trial.  EACH OF THE PARTIES TO THIS AGREEMENT HEREBY
            --------------------                                               
AGREES TO WAIVE ITS RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF
ACTION BASED UPON OR ARISING OUT OF THIS AGREEMENT OR ANY DEALINGS BETWEEN THEM
RELATING TO THE SUBJECT MATTER OF THIS AGREEMENT.  The scope of this waiver is
intended to be all-encompassing of any and all disputes that may be filed in any
court and that relate to the subject matter of this transaction, including,
without limitation, contract claims, tort claims, breach of duty claims and all
other common law and statutory claims.  Each party hereto acknowledges that this
waiver is a material inducement to enter into a business relationship, that each
has already relied on this waiver in entering into this Agreement, and that each
shall continue to rely on this waiver in their related future dealings.  Each
party hereto further warrants and represents that it has reviewed this waiver
with its legal counsel and that it knowingly and voluntarily waives its jury
trial rights following consultation with such legal counsel.  THIS WAIVER IS
IRREVOCABLE, MEANING THAT IT MAY NOT BE MODIFIED EITHER ORALLY OR IN WRITING,
AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS
OR MODIFICATIONS TO THIS AGREEMENT.  In the event of litigation, this Agreement
may be filed as a written consent to a trial by the court.

                                       36

 
     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed and delivered as of the date first above written.


PARTNERSHIP:        THREE EMBARCADERO CENTER WEST,
                    a California limited partnership

                    By:  THE PRUDENTIAL INSURANCE COMPANY
                         OF AMERICA, a New Jersey corporation,
                         its General Partner



                         By: /s/ Gary L. Frazier
                            ----------------------------------
                         Name: _______________________________
                         Title: ______________________________


BPECW LLC:          BP EC WEST LLC,
                    a Delaware limited liability company

                    By:  BOSTON PROPERTIES LIMITED PARTNERSHIP,
                         a Delaware limited partnership,
                         its sole Member

                         By:  BOSTON PROPERTIES, INC.,
                              a Delaware corporation,
                              its General Partner



                              By: /s/ Thomas J. O'Connor
                                 -----------------------------
                              Name: Thomas J. O'Connor
                              Title: Vice President

                                       37

 
INVESTOR:           BOSTON PROPERTIES LIMITED PARTNERSHIP,
                    a Delaware limited partnership

                    By:  BOSTON PROPERTIES, INC.,
                         a Delaware corporation,
                         its General Partner


                         By: /s/ Thomas J. O'Connor
                            ------------------------------------
                              Name: Thomas J. O'Connor
                              Title: Vice President


PUBLIC COMPANY:     BOSTON PROPERTIES, INC.,
                    a Delaware corporation


                    By: /s/ William J. Wedge
                       ----------------------------------
                    Name: William J. Wedge
                    Title: Senior Vice President

PRUDENTIAL:         THE PRUDENTIAL INSURANCE COMPANY OF AMERICA, a New Jersey
                    corporation


                    By: /s/ Gary L. Frazier
                       -----------------------------------------
                    Name: ______________________________________
                    Title: _____________________________________

PIC:                PIC REALTY CORPORATION,
                    a Delaware corporation


                    By: /s/ Gary L. Frazier
                       -----------------------------------------
                    Name: ______________________________________
                    Title: _____________________________________

PRS:                PRUDENTIAL REALTY SECURITIES II, INC.,
                    a Delaware corporation

                    By: /s/ Duane H. Tucker, Jr.
                       -----------------------------------------
                    Name:  Duane H. Tucker, Jr.
                    Title:  President

                                      A-1


 
                                                                    EXHIBIT 99.6


                           [Embarcadero Portfolio Registration Rights Agreement]





                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT

                                 BY AND AMONG

        BOSTON PROPERTIES, INC., BOSTON PROPERTIES LIMITED PARTNERSHIP

                                    AND THE

                             HOLDERS NAMED HEREIN

                               November 12, 1998

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT

     This Registration Rights and Lock-Up Agreement (this "Agreement") is
                                                           ---------     
entered into as of November 12, 1998 by and among Boston Properties, Inc., a
Delaware corporation (the "Company"), Boston Properties Limited Partnership, a
                           -------                                            
Delaware limited partnership (the "Partnership" and, with the "Company,"
                                   -----------                 -------  
collectively, the "Acquiror"), and the Persons whose names are set forth on
                   --------                                                
Schedule A hereto (each a "Holder" and, collectively, the "Holders").
- ----------                 ------                          -------   

     WHEREAS, certain of the Holders are parties to a Contribution Agreement
(the "ECIP Contribution Agreement"), dated November 12, 1998, by and among the
      ---------------------------                                             
Partnership, Embarcadero Center Investors Partnership, a California limited
partnership ("ECIP"), and such Holders relating to the contribution of interests
              ----                                                              
in ECIP to the Partnership in exchange for preferred units of limited
partnership in the Partnership denominated as "Series Two Preferred Units";
                                               --------------------------  

     WHEREAS, certain of the Holders are parties to a Contribution Agreement
(the "Three ECW Contribution Agreement"), dated November 12, 1998, by and among
      --------------------------------                                         
the Partnership, Three Embarcadero Center West, a California limited partnership
("Three ECW"), and such other Holders relating to the contribution of interests
  ---------                                                                    
in Three ECW (other than those interests owned by The Prudential Insurance
Company of America ("Prudential") to the Partnership in exchange for Series Two
                     ----------                                                
Preferred Units issued to such Holders (except that One Embarcadero Center
Venture, Three Embarcadero Center Venture and Four Embarcadero Center Venture
received Series Three Preferred Units (as defined below));

     WHEREAS, Three ECW (a Holder under this Agreement) is a party to a
Contribution Agreement (the "Three ECW Property Contribution Agreement" and,
                             -----------------------------------------      
together with the ECIP Contribution Agreement and the Three ECW Contribution
Agreement, the "Contribution Agreements"), dated November 12, 1998, by and among
                -----------------------                                         
the Company, the Partnership, BP/ECW LLC, Three ECW, Prudential and certain
Prudential affiliates, relating to the contribution by Three ECW of its entire
undivided interest in the property known as Embarcadero Center West to the
Partnership in exchange for preferred units of limited partnership in the
Partnership denominated as "Series Three Preferred Units."  The Series Two
                            ----------------------------                  
Preferred Units and the Series Three Preferred Units are collectively known as
the "Preferred Units.";
     ---------------   

     WHEREAS, the Preferred Units are being issued to the Holders in a private
placement transaction and accordingly constitute restricted securities;

     WHEREAS, upon the presentation of Common Units of limited partnership in
the Partnership ("Common Units") (which may be acquired upon conversion of
                  ------------                                            
Preferred Units) for redemption in accordance with the terms hereof and the
terms of the Second Amended and 

 
Restated Agreement of Limited Partnership of the Partnership (as amended, the
"Limited Partnership Agreement"), the Common Units may be acquired by the
 -----------------------------                    
Company for shares of the Company's common stock, par value $.01 per share
("Common Shares"), and the Company has agreed to provide certain registration
  ------ ------                                         
rights to the Holders in respect of such Common Shares and the Holders have
agreed to certain restrictions on the transferability and redemption of the
Units and such Common Shares;

     WHEREAS, the Preferred Units generally may not be converted into Common
Units (and thus, from Common Units into Common Shares) until December 31, 2002
(the "Conversion Date"); and
      ---------------       

     WHEREAS, it is a condition precedent under the Contribution Agreements that
each of the Company, the Partnership and the Holders enter into this Agreement.

     NOW, THEREFORE, in consideration of the foregoing, the mutual promises and
agreements set forth herein, and other valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto hereby agree as
follows:

     1.   Certain Definitions.
          ------------------- 

     As used in this Agreement, the following capitalized terms shall have the
following meanings (such definitions to be equally applicable to both the
singular and plural forms of the terms defined):

     "Acquiror" shall have the meaning set forth in the recitals hereto.
      --------                                                          

     "Affiliate Holder" shall have the meaning set forth in Section 3A(a)
      ----------------                                                   
hereof.

     "Agreement" shall have the meaning set forth in the recitals hereto.
      ---------                                                          

     "Common Shares" shall have the meaning set forth in the recitals hereto.
      -------------                                                          

     "Company" shall have the meaning set forth in the recitals hereto.
      -------                                                          

     "Contribution Agreements" shall have the meaning set forth in the recitals
      -----------------------                                                  
hereto.

     "Conversion Date" shall have the meaning set forth in the recitals hereto.
      ---------------                                                          

     "Dispose" and "Disposition" means any direct offer, pledge (unless the
      -------       -----------                                            
pledgee cannot foreclose on pledged Units until after the expiration of the
Lock-Up Period), sale, contract to 

                                       2

 
sell, grant of an option to sell (unless the optionee cannot exercise such
option until after the expiration of the Lock-Up Period) or other disposition.

     "ECIP" shall have the meaning set forth in the recitals hereto.
      ----                                                          

     "ECIP Contribution Agreement" shall have the meaning set forth in the
      ---------------------------                                         
recitals hereto.

     "Exchange Act" shall mean the Securities Exchange Act of 1934, as amended.
      ------------                                                             

     "Holder" shall have the meaning set forth in the recitals hereto.
      ------                                                          

     "Issuance Registration Expiration Date" shall have the meaning set forth in
      -------------------------------------                                     
Section 3A(a) hereof.

     "Issuance Registration Statement" shall have the meaning set forth in
      -------------------------------                                     
Section 3A(a) hereof.

     "Limited Partnership Agreement" shall have the meaning set forth in the
      -----------------------------                                         
recitals hereto.

     "Maximum Share Number" shall mean 10,080,685 (i.e., that number of Common
      --------------------                                                    
Shares equal to the difference between (a) 20% of the Company's outstanding
Common Shares as of the date hereof (12,705,357) and (b) the number of Common
Shares issuable upon conversion of Series A Preferred Shares issued to
Prudential, or any of its designees, under that certain Stock Purchase Agreement
of even date herewith between the Company and Prudential (2,624,672)). The
Maximum Share Number shall be appropriately adjusted in the case of any
dividends on Common Shares payable in Common Shares, any split of Common Shares,
or any reverse split or combination of Common Shares.

     "NASD" means the National Association of Securities Dealers, Inc.
      ----                                                            

     "Non-Redemption Period" shall have the meaning set forth in Section 2(a)
      ---------------------                                                  
hereof.

     "Outside Effective Date" shall have the meaning set forth in Section 3A(a)
      ----------------------                                                   
hereof.

     "Partnership" shall have the meaning set forth in the recitals hereto.
      -----------                                                          

     "Permitted Distributee" means a direct or indirect holder of equity
      ---------------------                                             
interests, as of the date hereof, in a Holder, as listed on Schedule B hereto,
                                                            ----------        
which Permitted Distributee has delivered to the Company a Representation Letter
(as defined in the Contribution Agreements).

                                       3

 
     "Person" shall mean an individual, partnership, limited liability company,
      ------                                                                   
corporation, trust or unincorporated organization, or a government or agency or
political subdivision thereof.

     "Preferred Units" shall have the meaning set forth in the recitals hereto.
      ---------------                                                          

     "Prospectus" shall mean the prospectus included in a Registration
      ----------                                                      
Statement, including any preliminary prospectus, as amended or supplemented by
any prospectus supplement with respect to the terms of the offering of any
portion of the Registrable Shares covered by such Registration Statement, and by
all other amendments and supplements to such prospectus, including post-
effective amendments, and in each case including all material incorporated by
reference therein.

     "Prudential" shall have the meaning set forth in the recitals hereto.
      ----------                                                          

     "Resale Shelf Registration Expiration Date" shall have the meaning set
      -----------------------------------------                            
forth in Section 3(A)(b) hereof.

     "Resale Shelf Registration Statement" shall have the meaning set forth in
      -----------------------------------                                     
Section 3A(b) hereof.

     "Registrable Shares" (a) when used with respect to a non-Affiliate Holder,
      ------------------                                                       
shall mean the Shares of such Holder, excluding (i) Shares for which a
Registration Statement relating to the issuance or sale thereof shall have
become effective under the Securities Act and which have been issued or disposed
of under such Registration Statement, (ii) Shares sold pursuant to Rule 144 or
(iii) Shares eligible for sale pursuant to Rule 144(k) (or any successor
provision); (b) when used with respect to an Affiliate Holder, shall mean the
Shares of such Affiliate Holder, excluding (i) Shares for which a Registration
Statement relating to the sale thereof shall have become effective under the
Securities Act and which have been disposed of under such Registration
Statement, (ii) Shares sold pursuant to Rule 144 or (iii) Shares eligible for
sale pursuant to Rule 144(k) (or any successor provision); and (c) when used
without reference to a Holder, shall mean the Registrable Shares of all Holders.

     "Registration Expenses" shall mean any and all expenses incident to
      ---------------------                                             
performance of or compliance with this Agreement, including, without limitation:
(i) all SEC, stock exchange or NASD registration and filing fees; (ii) all fees
and expenses incurred in connection with compliance with state securities or
"blue sky" laws (including reasonable fees and disbursements of counsel in
connection with "blue sky" qualification of any of the Registrable Shares and
the preparation of a Blue Sky Memorandum) and compliance with the rules of the
NASD; (iii) all expenses of any Persons in preparing or assisting in preparing,
word processing, printing and distributing any Registration Statement, any
Prospectus, certificates 

                                       4

 
and other documents relating to the performance of and compliance with this
Agreement; (iv) all fees and expenses incurred in connection with the listing,
if any, of any of the Registrable Shares on any securities exchange or exchanges
pursuant to Section 5 hereof; and (v) the fees and disbursements of counsel for
the Company and of the independent public accountants of the Company.
Registration Expenses shall specifically exclude underwriting discounts and
commissions relating to the sale or disposition of Registrable Shares by a
selling Holder, the fees and disbursements of counsel representing a selling
Holder, and transfer taxes, if any, relating to the sale or disposition of
Registrable Shares by a selling Holder, all of which shall be borne by such
Holder in all cases.

     "Registration Statement" shall mean any registration statement of the
      ----------------------                                              
Company which covers the issuance or resale of any of the Registrable Shares on
an appropriate form, and all amendments and supplements to such registration
statement, including post-effective amendments, in each case including the
Prospectus contained therein, all exhibits thereto and all materials
incorporated by reference therein.

     "Rule 144" shall mean Rule 144 under the Securities Act (or any successor
      --------                                                                
provision).

     "Securities Act" shall mean the Securities Act of 1933, as amended.
      --------------                                                    

     "SEC" shall mean the Securities and Exchange Commission.
      ---                                                    

     "Series A Preferred Shares" shall mean shares of the Company's series of
      -------------------------                                              
preferred stock, par value $.01 per share, called the Series A Preferred Stock.

     "Series Three Preferred Units" shall have the meaning set forth in the
      ----------------------------                                         
recitals hereto.

     "Series Two Preferred Units" shall have the meaning set forth in the
      --------------------------                                         
recitals hereto.

     "Shares" (a) when used with respect to a Holder, shall mean any Common
      ------                                                               
Shares issued (or which are not currently outstanding but are issuable) to the
Holder upon redemption or in exchange for Source Common Units and (b) when used
without reference to a Holder, shall mean the Shares of all Holders; provided,
                                                                     -------- 
that any Common Shares issued in respect of Shares as a stock dividend or in
- ----                                                                        
connection with a stock split, reorganization, reclassification, merger,
consolidation or similar event shall also be deemed to be "Shares" for purposes
of this Agreement.

     "Source Common Units" shall mean Common Units which are held by a Holder
      -------------------                                                    
and which Common Units were issued, or which are not currently outstanding but
are issuable, upon conversion of Preferred Units which were issued by the
Partnership pursuant to a Contribution Agreement.

                                       5

 
     "Three ECW" shall have the meaning set forth in the recitals hereto.
      ---------                                                          

     "Three ECW Contribution Agreement" shall have the meaning set forth in the
      --------------------------------                                         
recitals hereto.

     "Three ECW Property Contribution Agreement" shall have the meaning set
      -----------------------------------------                            
forth in the recitals hereto.

     "Units" shall mean the Preferred Units and the Common Units that may be
      -----                                                                 
acquired upon conversion of the Preferred Units.

     2.   Disposition Restrictions; Mandatory Cash Redemptions.
          ---------------------------------------------------- 

     (a) Lock-Up Period.  Each Holder hereby agrees that for a period of one
         --------------                                                     
year after the date hereof (the "Lock-Up Period"), it will not Dispose of any
                                 --------------                              
Units; provided, however, that, subject to Sections 2(b), such Holder may:
       --------  -------                                                  

          (i)   Dispose of Units to a Permitted Distributee;

          (ii)  Dispose of Units to another Holder;

          (iii) Dispose of Units on his or her death to such Holder's estate,
                executor, administrator or personal representative or to such
                Holder's beneficiaries pursuant to a devise or bequest or by
                laws of descent and distribution; and

          (iv)  Dispose of Units to any other Person; provided, that within a
                                                      --------  ----         
                reasonable period of time (but in no event less than five (5)
                business days) prior to such Disposition, such Holder provides
                to the Company (i) written notice reasonably describing the
                terms, circumstances and intended date of such Disposition and
                (ii) a written opinion of nationally recognized counsel that
                such Disposition shall not cause the Company or the Partnership
                to (a) violate, or have been in violation of, any law, statute,
                code, rule, regulation, administrative or executive order or
                other requirement or policy of any governmental authority or (b)
                be subject to, or have been in violation of, the disclosure or
                proxy-related obligations for roll-up transactions set forth in
                Section 14(h) of the Exchange Act or Items 901-915 of Regulation
                S-K of the Securities Act in connection with the issuance of the
                Units pursuant to the Contribution Agreements;

                                       6

 
and provided, further, that the transferor shall, in connection with any
    --------  -------                                                   
Disposition, at the reasonable request of the Company, provide evidence
reasonably satisfactory to the Company that the transfer is exempt from the
registration requirements of the Securities Act.

     Following the expiration of the Lock-Up Period, the only contractual
restrictions on the Disposition of Units shall be those set forth herein and in
the Limited Partnership Agreement and the Company's Certificate of
Incorporation.

     (b)  Binding Obligation; Certain Provisions of Organizational Documents. If
          ------------------------------------------------------------------  
a Holder Disposes of Shares or Units under any provision of this Section 2, such
Shares and Units shall remain subject to this Agreement and, as a condition of
the validity of such disposition, the transferee shall be required to execute
and deliver a counterpart of this Agreement unless such transferee is already a
Holder.  Thereafter, such transferee shall be deemed to be a Holder for purposes
of this Agreement.  The provisions set forth in this Agreement permitting
Dispositions of the Shares and Units shall not be deemed in any manner to limit
any provision of the Company's Certificate of Incorporation or the Partnership's
Limited Partnership Agreement which set forth restrictions or limitations on the
transferability of Shares or Units.

     (c)  After a number of Common Shares equal to the Maximum Share Number has
been issued by the Company, pursuant to Section 8.6.B of the Limited Partnership
Agreement, in exchange for Source Common Units presented to the Partnership for
redemption, the Partnership shall be irrevocably obligated to pay to any Holder
that presents Source Common Units for redemption the appropriate Cash Amount (as
defined in the Limited Partnership Agreement), pursuant to Section 8.6.A of the
Limited Partnership Agreement (i.e., the Company shall lose its rights under
                               ----                                         
Section 8.6.B of the Limited Partnership Agreement to acquire such Units for
Common Shares).

     3A.  Registration with Respect to Holders.
          ------------------------------------ 

     (a)  Filing of Issuance Registration Statement.  Subject to the conditions
          -----------------------------------------                            
set forth in this Agreement, the Company shall cause to be filed with the SEC by
September 2, 2002 a Registration Statement (the "Issuance Registration
                                                 ---------------------
Statement") under Rule 415 under the Securities Act relating to (i) the issuance
to the Holders of Registrable Shares upon the redemption of Common Units or in
exchange for Common Units and (ii) the sale by any Holder who is an affiliate of
the Company (as defined in Rule 144(a) under the Securities Act) (each, an
                                                                          
"Affiliate Holder") of all of the Registrable Shares of such Holder or Holders
- -----------------                                                             
in accordance with the terms hereof, and shall use reasonable best efforts to
cause such Registration Statement to be declared effective by the SEC as soon as
practicable thereafter.  In the event that the Company is unable to cause the
Issuance Registration Statement to be declared effective by the SEC prior to
November 1, 2002 (the "Outside Effective Date"), then 
                       ----------------------                                  

                                       7

 
the provisions of Section 3A(b) shall apply. The Company agrees to use
reasonable best efforts to keep the Registration Statement, after its date of
effectiveness, continuously effective until the date on which (i) all Holders
have redeemed or exchanged for Common Shares the Common Units that may be issued
upon conversion of Preferred Units and (ii) the Affiliate Holders (A) no longer
hold any Registrable Shares or (B) may sell all of the Registrable Shares held
by such Affiliate Holders pursuant to Rule 144(k) (or any successor provision)
(hereinafter referred to as the "Issuance Registration Expiration Date").
                                 -------------------------------------   

     (a-1)   Notwithstanding the foregoing, in the event the Conversion Date
with respect to a Holder's Preferred Units accelerates due to the consummation
of a "Cash Business Combination" (as defined in the relevant Preferred Units'
Certificate of Designations), (i) the Company's obligations under Section 3A(b)
below shall become immediately effective with respect to such Holder (provided,
however, that the Company must file the Resale Registration Statement (as
defined below) within forty-five (45) days of the consummation of such
transaction) and (ii) the Company's obligations under Section 3A(a) above shall
terminate with respect to such Holder.

     (b)     Registration Statement Covering Resale of Common Shares.  In the
             -------------------------------------------------------    
event that the Company determines that it is unable to cause the Issuance
Registration Statement to be declared effective by the SEC by the Outside
Effective Date or (except as otherwise permitted by Sections 9(b) and 10) is
unable or it is impracticable to keep such Issuance Registration Statement
continuously effective until the Issuance Registration Expiration Date, the
Company shall cause to be filed with the SEC, within ten (10) business days
after the Company makes such determination, a Registration Statement (the
"Resale Shelf Registration Statement") under Rule 415 under the Securities Act
 -----------------------------------     
relating to the resale by each Holder of all Registrable Shares of such Holder.
The Company shall use reasonable best efforts to cause such Registration
Statement to be declared effective by the SEC as soon as practicable thereafter.
The Company agrees to use reasonable best efforts to keep the Resale Shelf
Registration Statement, after its date of effectiveness, continuously effective
until the earlier of (a) the date on which all Registrable Shares have been
disposed of by the Holders or (b) the date on which all Registrable Shares have
become eligible for sale pursuant to Rule 144(k) (or any successor provision)
(the "Resale Shelf Expiration Date"). After the Company has filed the Resale
      ---------------------------- 
Shelf Registration Statement, any obligation of the Company to file the Issuance
Registration Statement pursuant to Section 3A(a) shall be suspended for so long
as the Resale Shelf Registration Statement remains effective.

     (c)     Demand Registration.  Subject to the conditions set forth in this
             -------------------                                              
Agreement, at any time after the later of the Resale Shelf Registration
Expiration Date and the Issuance Registration Expiration Date and while any
Registrable Shares are outstanding (or are not currently outstanding, but are
issuable), the Company shall, at the written request of any Holder holding
Registrable Shares, cause to be filed within twenty (20) business days after the

                                       8

 
date of such request by such Holder a Registration Statement under Rule 415
under the Securities Act relating to the sale by the Holder of all of the
Registrable Shares held by such Holder in accordance with the terms hereof, and
shall use reasonable best efforts to cause such Registration Statement to be
declared effective by the SEC as soon as practicable thereafter. The Company
may, in its sole discretion, elect to file the Registration Statement before
receipt of notice from any Holder.  The Company agrees to use reasonable efforts
to keep the Registration Statement continuously effective, after its date of
effectiveness, until the date on which such Holder no longer holds any
Registrable Shares.

     (d)  Piggyback Registration.  If at any time after the  Conversion Date,
          ----------------------                                             
while any Registrable Shares of a Holder are outstanding (or are not currently
outstanding, but are issuable) and (except as otherwise permitted by Sections
9(b) and 10) a Registration Statement applicable to Holders under Sections
3A(a), 3A(b) or 3A(c) is not effective, the Company proposes to file a
registration statement under the Securities Act with respect to an offering
solely of Common Shares solely for cash (other than a registration statement (i)
on Form S-8 or any successor form to such Form or in connection with any
employee or director welfare, benefit or compensation plan, (ii) on Form S-4 or
any successor form to such Form or in connection with an exchange offer, (iii)
in connection with a rights offering exclusively to existing holders of Common
Shares, (iv) in connection with an offering solely to employees of the Company
or its subsidiaries, or (v) relating to a transaction pursuant to Rule 145 of
the Securities Act), for its own account or for the accounts of other Holders,
the Company shall give prompt written notice of such proposed filing to the
Holders.  The notice referred to in the preceding sentence shall offer the
Holders the opportunity to register such amount of Registrable Shares as each
Holder may request (a "Piggyback Registration").  Subject to the provisions of
                       ----------------------                                 
Section 4 below, the Company shall include in such Piggyback Registration, in
the registration and qualification for sale under the blue sky or securities
laws of the various states and in any underwriting in connection therewith all
Registrable Shares for which the Company has received written requests for
inclusion therein from Holders within twenty (20) calendar days after the notice
referred to above has been given by the Company to the Holders. Holders of
Registrable Shares shall be permitted to withdraw all or part of the Registrable
Shares from a Piggyback Registration at any time prior to the effective date of
such Piggyback Registration.  If a Piggyback Registration is an underwritten
primary registration on behalf of the Company and the managing underwriter
advises the Company that the total number of Common Shares requested to be
included in such registration by the Holders and holders under similar
registration rights agreements exceeds the number of Common Shares that can be
sold in such offering without impairing the pricing or other commercial
practicality of such offering, the Company will include in such registration in
the following priority:  (i) first, all Common Shares the Company proposes to
sell, (ii) second, up to the full number of applicable Common Shares requested
to be included in such registration by any holders identified in that certain
Registration Rights and Lock-Up Agreement dated June 23, 1997, as amended from
time to time, by and among the Company and such holders, and (iii) third, up to
the full 

                                       9

 
number of applicable Registrable Shares requested to be included in such
registration by any Holders and any other holders under similar registration
rights agreements with the Company which, in the case of this clause (iii), in
the opinion of such managing underwriter, can be sold without adversely
affecting the price range or probability of success of such offering (with, to
the extent necessary, Registrable Shares allocated pro rata among the Holders
                                                   --- ----          
and such other holders on the basis of the total number of Common Shares
requested to be included in such registration by all such holders). If in
connection with any registration under this Section 3A(d), the Common Shares to
be registered will be distributed by or through one or more underwriters, then
the Company will make reasonable efforts, upon the request of any Holder
requesting registration of Registrable Shares under this Section 3A(d), to
arrange for such underwriters to include the Registrable Shares of such Holder
among the Shares to be distributed by or through such underwriters.

     3B.  Miscellaneous Provisions Relating to Registration Statements.
          ------------------------------------------------------------ 

     (a)  Notification and Distribution of Materials.  The Company shall notify
          ------------------------------------------                           
each Holder of the effectiveness of any Registration Statement applicable to the
Shares of such Holder and shall furnish to each such Holder such number of
copies of the Registration Statement (including any amendments, supplements and
exhibits), the Prospectus contained therein (including each preliminary
prospectus and all related amendments and supplements) and any documents
incorporated by reference in the Registration Statement or such other documents
as such Holder may reasonably request in order to facilitate its sale of the
Registrable Shares in the manner described in the Registration Statement.

     (b)  Amendments and Supplements.  The Company shall prepare and file with
          --------------------------                                          
the SEC from time to time such amendments and supplements to the Registration
Statement and Prospectus used in connection therewith as may be necessary to
keep the Registration Statement effective and to comply with the provisions of
the Securities Act with respect to the disposition of all the Registrable Shares
until the earlier of (a) the Issuance Registration Expiration Date (in the case
of a Registration Statement filed pursuant to Section 3A(a) hereof) or the
Resale Registration Expiration Date (in the case of a Registration Statement
filed pursuant to Section 3A(b) hereof) or (b) the date on which the
Registration Statement ceases to be effective in accordance with the terms of
this Section 3.  Upon ten (10) business days' notice, the Company shall file any
supplement or post-effective amendment to the Registration Statement with
respect to the plan of distribution or such Holder's ownership interests in
Registrable Shares that is reasonably necessary to permit the sale of the
Holder's Registrable Shares pursuant to the Registration Statement.  The Company
shall file any necessary listing applications or amendments to the existing
applications to cause the Shares registered under any Registration Statement to
be then listed or quoted on the primary exchange or quotation system on which
the Common Shares are then listed or quoted.

                                      10

 
     (c)  Notice of Certain Events.  The Company shall promptly notify each
          ------------------------                                         
applicable Holder of, and confirm in writing, the filing of the Registration
Statement or any Prospectus, amendment or supplement related thereto or any
post-effective amendment to the Registration Statement applicable to such Holder
and the effectiveness of any post-effective amendment.

     At any time when a Prospectus relating to the Registration Statement is
required to be delivered under the Securities Act by a Holder to a transferee,
the Company shall immediately notify each Holder of the happening of any event
as a result of which the Prospectus included in such Registration Statement, as
then in effect, includes an untrue statement of a material fact or omits to
state any material fact required to be stated therein or necessary to make the
statements therein, in light of the circumstances under which they were made,
not misleading. In such event, the Company shall promptly prepare and furnish to
each applicable Holder a reasonable number of copies of a supplement to or an
amendment of such Prospectus as may be necessary so that, as thereafter
delivered to the purchasers of Registrable Shares, such Prospectus shall not
include an untrue statement of a material fact or omit to state a material fact
required to be stated therein or necessary to make the statements therein, in
light of the circumstances under which they are made, not misleading.  The
Company will, if necessary, amend the Registration Statement of which such
Prospectus is a part to reflect such amendment or supplement.

     (d)  Underwritten Offerings.  In the case of an underwritten offering of
          ----------------------                                             
Registrable Shares in which Holders will offer a number of Registrable Shares
with an aggregate offering price to the public of at least $35 million (provided
such number of shares represents at least 20 times the average daily trading
volume of Common Shares during the four weeks preceding the request by the
Holders to initiate an underwritten offering), the Company shall permit Holders
who hold a majority of all Registrable Shares held by the Holders who are
participating in such offering to select the investment banker(s) and manager(s)
who will administer such offering, subject to the approval of the Company which
will not be unreasonably withheld.  In connection with any such underwritten
offering, the Company (upon ten (10) business days advance notice) will (i)
enter into underwriting and related agreements reasonably acceptable to the
Company with customary terms (including representations and warranties and
indemnification provisions, such provisions to be, to the extent customary, in
favor of the selling Holders as well as the underwriters, but which terms,
however, shall be no less favorable to the Company than the most recent
underwriting agreement entered into by the Company); (ii) to the extent not
otherwise disruptive of the Company's operations, reasonably cooperate with the
underwriter(s); (iii) provide customary closing documentation; (iv) to the
extent necessary, amend the Registration Statement; (v) to the extent not
otherwise disruptive of the Company's operations, provide such information and
make available appropriate personnel as may reasonably be requested by the
Holders or the managing underwriters, and (vi) to the extent not otherwise
disruptive of the Company's operations, provide such Holder and underwriters and
their respective counsel and accountants, 

                                      11

 
if any, the opportunity to participate in the preparation of such Registration
Statement, provided, that (a) Company personnel will not be required to
           --------  ----            
participate in road show presentations (but, upon reasonable advance notice and
to the extent not unduly disruptive of the Company's operations, Company
personnel whose identity and office may be reasonably determined by the Company
will be available to participate in a reasonable number of conference calls) and
(b) the Company will be reimbursed by the Holders participating in the offering
(who shall be jointly and severally liable for such reimbursement) for any out
of pocket costs and expenses in connection with such cooperation to the extent
such expenses are greater than the expenses, or are not the type of expenses,
which would be borne by the Company in the case of other Registration Statements
filed hereunder (e.g., the cost of preparing glossy prospectuses with pictures
                 ----     
and the cost of any road show presentations in which the Company may in its sole
discretion may elect to participate).

     4.   State Securities Laws.  Subject to the conditions set forth in this
          ---------------------                                              
Agreement, the Company shall, in connection with the filing of any Registration
Statement hereunder, file such documents as may be necessary to register or
qualify the Registrable Shares under the securities or "Blue Sky" laws of such
states as any Holder may reasonably request, and the Company shall use its best
efforts to cause such filings to become effective; provided, however, that the
                                                   --------  -------          
Company shall not be obligated to qualify as a foreign corporation to do
business under the laws of any such state in which it is not then qualified or
to file any general consent to service of process in any such state.  Once
effective, the Company shall use its best efforts to keep such filings effective
until the earlier of (a) such time as all of the Registrable Shares have been
disposed of in accordance with the intended methods of disposition by the Holder
as set forth in the Registration Statement, (b) in the case of a particular
state, a Holder has notified the Company that it no longer requires an effective
filing in such state in accordance with its original request for filing or (c)
the date on which the Registration Statement ceases to be effective.

     5.   Expenses.  Except as provided in Section 3B(d), the Company shall bear
          --------                                                              
all Registration Expenses incurred in connection with the registration of the
Registrable Shares pursuant to this Agreement, except that each Holder shall be
responsible for any brokerage or underwriting commissions and taxes of any kind
(including, without limitation, transfer taxes) with respect to any disposition,
sale or transfer of Registrable Shares sold by it and for any legal, accounting
and other expenses incurred by it.

     6.   Indemnification by the Company.  The Company agrees to indemnify each
          ------------------------------                                       
of the Holders and their respective officers, directors, employees, agents,
representatives, fiduciaries and affiliates, and any underwriter (as defined in
the Securities Act (unless a formal underwriting agreement is entered into
between the Company and such underwriter, in which case the indemnification
provisions, if any, set forth therein shall apply), and each person or entity,
if any, that controls a Holder within the meaning of the Securities Act, and
each other 

                                      12

 
person or entity, if any, subject to liability because of his, her or its
connection with a Holder (each, an "Indemnitee"), against any and all losses,
                                    ----------                       
claims, damages, actions, liabilities, costs and expenses (including without
limitation reasonable fees, expenses and disbursements of attorneys and other
professionals), joint or several, arising out of or based upon any violation by
the Company of the Securities Act or of any rule or regulation promulgated
thereunder (i) applicable to the Company and relating to action or inaction
required of the Company in connection with any Registration Statement or
Prospectus, or (ii) upon any untrue or alleged untrue statement of material fact
contained in the Registration Statement or any Prospectus, or any omission or
alleged omission to state therein a material fact required to be stated therein
or necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading; provided, that the Company shall not be
                                      --------  ----    
liable to such Indemnitee or any person who participates as an underwriter in
the offering or sale of Registrable Shares or any other person, if any, who
controls such underwriter within the meaning of the Securities Act, in any such
case to the extent that any such loss, claim, damage, liability (or action or
proceeding in respect thereof) or expense arises out of or is based upon (a) an
untrue statement or alleged untrue statement or omission or alleged omission
made in such Registration Statement or in any such Prospectus in reliance upon
and in conformity with information regarding such Indemnitee or its plan of
distribution or ownership interests which was furnished in writing by such
person to the Company for use in connection with the Registration Statement or
the Prospectus contained therein by such Indemnitee or (b) such Holder's failure
to send or give a copy of the final, amended or supplemented prospectus
furnished to the Holder by the Company at or prior to the time such action is
required by the Securities Act to the person claiming an untrue statement or
alleged untrue statement or omission or alleged omission if such statement or
omission was corrected in such final, amended or supplemented prospectus.

     7.   Covenants of Holders.  Each of the Holders (severally and not jointly)
          --------------------                                                  
hereby agrees (a) to cooperate with the Company and to furnish to the Company
all such information concerning its plan of distribution and ownership interests
with respect to its Registrable Shares in connection with the preparation of a
Registration Statement with respect to such Holder's Registrable Shares and any
filings with any state securities commissions as the Company may reasonably
request, (b) to deliver or cause delivery of the Prospectus contained in such
Registration Statement to any purchaser of the shares covered by such
Registration Statement from the Holder and (c) to indemnify the Company, its
officers, directors, employees, agents, representatives and affiliates, and each
person, if any, who controls the Company within the meaning of the Securities
Act, and each other person, if any, subject to liability because of his
connection with the Company, against any and all losses, claims, damages,
actions, liabilities, costs and expenses (including, without limitation,
reasonable fees, expenses and disbursements of attorneys and other
professionals) arising out of or based upon (i) any untrue statement or alleged
untrue statement of material fact contained in either such Registration
Statement or the Prospectus contained therein, or any omission or alleged

                                      13

 
omission to state therein a material fact required to be stated therein or
necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading, if and to the extent that such statement
or omission occurs from reliance upon and in conformity with written information
regarding such Holder, its plan of distribution or its ownership interests,
which was furnished to the Company by such Holder expressly for use therein
unless such statement or omission was corrected in writing to the Company not
less than three (3) business days prior to the date of the final prospectus (as
supplemented or amended, as the case may be) or (ii) the failure by the Holder
to deliver or cause to be delivered the Prospectus contained in such
Registration Statement (as amended or supplemented, if applicable) furnished by
the Company to the Holder to any purchaser of the shares covered by such
Registration Statement from the Holder through no fault of the Company.
Notwithstanding the provisions of this Section 7, no Holder shall be required to
pay as indemnification hereunder any amount in excess of the gross proceeds from
the sale of Shares by such Holder which gave rise to the incurrence of such
indemnification.

      8.  Indemnification Procedures.
          -------------------------- 

     Any person entitled to indemnification under this Agreement shall notify
promptly the indemnifying party in writing of the commencement of any action or
proceeding with respect to which a claim for indemnification may be made
hereunder, but the failure of any indemnified party to provide such notice shall
not relieve the indemnifying party of its obligations hereunder, except to the
extent the indemnifying party is materially prejudiced thereby and shall not
relieve the indemnifying party from any liability which it may have to any
indemnified party otherwise than hereunder.  In case any action or proceeding is
brought against an indemnified party and it shall notify the indemnifying party
of the commencement thereof, the indemnifying party shall be entitled to
participate therein and, unless in the reasonable opinion of outside counsel to
the indemnified party a conflict of interest between such indemnified and
indemnifying parties may exist in respect of such claim, to assume the defense
thereof (alone or jointly with any other indemnifying party similarly notified),
to the extent that it chooses, with counsel reasonably satisfactory to such
indemnified party, and after notice from the indemnifying party to such
indemnified party that it so chooses, the indemnifying party shall not be liable
to such indemnified party for any legal or other expenses subsequently incurred
by such indemnified party in connection with the defense thereof; provided,
                                                                  -------- 
however, that (i) if the indemnifying party fails to take reasonable steps
- -------                                                                   
necessary to defend diligently the action or proceeding within twenty (20)
business days after receiving notice from such indemnified party that the
indemnified party believes it has failed to do so; or (ii) if such indemnified
party who is a defendant in any action or proceeding which is also brought
against the indemnifying party reasonably shall have reasonably concluded, based
on the advice of counsel, that there may be one or more legal defenses available
to such indemnified party which are not available to the indemnifying party; or
(iii) if representation of both parties by the same counsel is otherwise
inappropriate under applicable standards of 

                                      14

 
professional conduct, then, in any such case, the indemnified party shall have
the right to assume or continue its own defense as set forth above (but with no
more than one firm of counsel for all indemnified parties in each jurisdiction,
except to the extent any indemnified party or parties reasonably shall have
concluded, based on the advice of counsel, that there may be legal defenses
available to such party or parties which are not available to the other
indemnified parties or to the extent representation of all indemnified parties
by the same counsel is otherwise inappropriate under applicable standards of
professional conduct) and the indemnifying party shall be liable for any
expenses therefor. No indemnifying party shall, without the written consent of
the indemnified party (which shall not be unreasonably withheld), effect the
settlement or compromise of, or consent to the entry of any judgment with
respect to, any pending or (to the knowledge of the indemnifying party)
threatened action or claim in respect of which indemnification or contribution
may be sought hereunder (whether or not the indemnified party is an actual or
potential party to such action or claim) unless such settlement, compromise or
judgment (A) includes an unconditional release of the indemnified party from all
liability arising out of such action or claim and (B) does not include a
statement as to or an admission of fault, culpability or a failure to act, by or
on behalf of any indemnified party.

     9.   Suspension of Registration Requirement; Restriction on Sales.
          ------------------------------------------------------------ 

     (a)  The Company shall promptly notify each Holder of, and confirm in
writing, the issuance by the SEC of any stop order suspending the effectiveness
of a Registration Statement with respect to such Holder's Registrable Shares or
the initiation of any proceedings for that purpose.  The Company shall use its
best efforts to obtain the withdrawal of any order suspending the effectiveness
of such a Registration Statement at the earliest possible moment.

     (b)  Notwithstanding anything to the contrary set forth in this Agreement,
the Company's obligation under this Agreement to cause a Registration Statement
and any filings with any state securities commission to become effective or to
amend or supplement a Registration Statement shall be suspended in the event and
during such period as unforeseen circumstances exist (including without
limitation (i) an underwritten primary offering by the Company if the Company is
advised by the underwriters that the sale of Registrable Shares under the
Registration Statement would impair the pricing or commercial practicality of
the primary offering or (ii) pending negotiations relating to, or consummation
of, a transaction or the occurrence of an event that would require additional
disclosure of material information by the Company in the Registration Statement
or such filing, as to which the Company has a bona fide business purpose for
                                              ---- ----                     
preserving confidentiality or which renders the Company unable to comply with
SEC requirements) (such unforeseen circumstances being hereinafter referred to
as a "Suspension Event") that would make it impractical or unadvisable to cause
      ----------------                                                         
the Registration Statement or such filings to become effective or to amend or
supplement the 

                                      15

 
Registration Statement, but such suspension shall continue only for so long as
such event or its effect is continuing. The Company shall promptly notify the
Holders of the existence and, in the case of circumstances referred to in clause
(i) of this Section 9(b), nature of any Suspension Event, and shall promptly
notify the Holders upon the expiration of such Suspension Event.

     (c) Each holder of Registrable Shares agrees, if requested by the Company
in the case of a Company-initiated non-underwritten offering or if requested by
the managing underwriter or underwriters in a Company-initiated underwritten
offering, not to effect any public sale or distribution of any of the securities
of the Company, including a sale pursuant to Rule 144, during the fifteen (15)
day period prior to, and during the sixty (60) day period beginning on, the date
of commencement of such Company-initiated offering (such period, or such lesser
period as the Company may specify, a "Company Sale Period"), subject to its
                                      -------------------                  
rights under Section 3A(d) hereof, and provided, that any such request shall be
                                       --------  ----                          
made no more then two times in any twelve-month period.

     (d) Notwithstanding anything to the contrary in this Agreement, in no event
shall Suspension Events be permitted to take effect more than twice in any
twelve-month period and in no event shall Suspension Events and Company Sale
Periods be permitted to take effect for more than an aggregate of one hundred
twenty (120) days in any twelve-month period.

     10. Black-Out Period.  Each Holder agrees that, following the
         ----------------                                         
effectiveness of any Registration Statement (except an Issuance Registration
Statement) relating to Registrable Shares of such Holder, such Holder will not
effect any sales of the Registrable Shares pursuant to the Registration
Statement or any filings with any state Securities Commission at any time after
such Holder has received notice from the Company to suspend sales as a result of
the occurrence or existence of any Suspension Event or so that the Company may
correct or update the Registration Statement or such filing.  During such
period, the Company will not be obligated to effect redemptions of Common Units
under an Issuance Registration Statement.  The Holder may recommence effecting
sales of the Shares pursuant to the Registration Statement or such filings, and
the Company will be obligated to resume effecting redemptions of Common Units
under an Issuance Registration Statement, and all other obligations which are
suspended as a result of a Suspension Event shall no longer be so suspended,
following further notice to such effect from the Company, which notice shall be
given by the Company not later than five (5) business days after the conclusion
of any such Suspension Event.

     11. Additional Shares.  The Company, at its option, may register, under
         -----------------                                                  
any Registration Statement and any filings with any state securities commissions
filed pursuant to this Agreement, any number of unissued Common Shares of the
Company or any Common Shares of the Company owned by any other shareholder or
shareholders of the Company.

                                       16

 
     12.  Contribution.  If the indemnification provided for in Sections 6 and 7
          ------------                                                          
is unavailable to an indemnified party with respect to any losses, claims,
damages, actions, liabilities, costs or expenses referred to therein or is
insufficient to hold the indemnified party harmless as contemplated therein,
then the indemnifying party, in lieu of indemnifying such indemnified party,
shall contribute to the amount paid or payable by such indemnified party as a
result of such losses, claims, damages, actions, liabilities, costs or expenses
in such proportion as is appropriate to reflect the relative fault of the
Company, on the one hand, and the Indemnitee, on the other hand, in connection
with the statements or omissions which resulted in such losses, claims, damages,
actions, liabilities, costs or expenses as well as any other relevant equitable
considerations.  The relative fault of the Company, on the one hand, and of the
Indemnitee, on the other hand, shall be determined by reference to, among other
factors, whether the untrue or alleged untrue statement of a material fact or
omission to state a material fact relates to information supplied by the Company
or by the Indemnitee and the parties' relative intent, knowledge, access to
information and opportunity to correct or prevent such statement or omission;
provided, however, that in no event shall the obligation of any indemnifying
- --------  -------                                                           
party to contribute under this Section 12 exceed the amount that such
indemnifying party would have been obligated to pay by way of indemnification if
the indemnification provided for under Sections 6 or 7 hereof had been available
under the circumstances.

     The Company and the Holders agree that it would not be just and equitable
if contribution pursuant to this Section 12 were determined by pro rata
                                                               --- ----
allocation or by any other method of allocation that does not take account of
the equitable considerations referred to in the immediately preceding paragraph.

     Notwithstanding the provisions of this Section 12, no Holder shall be
required to contribute any amount in excess of the amount by which the gross
proceeds from the sale of Shares exceeds the amount of any damages that the
Holder has otherwise been required to pay by reason of such untrue or alleged
untrue statement or omission.  No indemnified party guilty of fraudulent
misrepresentation (within the meaning of Section 11(f) of the Securities Act)
shall be entitled to contribution from any indemnifying party who was not guilty
of such fraudulent misrepresentation.

     13.  Amendments and Waivers.  The provisions of this Agreement may not be
          ----------------------                                              
amended, modified, or supplemented or waived without the prior written consent
of the Company and Holders holding in excess of one-half of the aggregate of all
Shares held by (or issuable to) such Holders.

     14.  Notices.  Except as set forth below, all notices and other
          -------                                                   
communications provided for or permitted hereunder shall be in writing and shall
be deemed to have been duly given if delivered personally or sent by registered
or certified mail (return receipt requested), 

                                       17

 
postage prepaid or courier or overnight delivery service to the respective
parties at the following addresses (or at such other address for any party as
shall be specified by like notice, provided, that notices of a change of address
                                   --------  ----
shall be effective only upon receipt thereof):

          If to the Company:       Boston Properties, Inc.
                                   8 Arlington Street
                                   Boston, MA 02116
                                   Attn: Chief Financial Officer
                                   Telecopy:  (617) 536-4233
 
          with a copy to:          Goodwin, Procter & Hoar  LLP
                                   Exchange Place
                                   Boston, MA 02109
                                   Attn: Edward M. Schulman, Esq.
                                   Telecopy: (617) 523-1231

          If to the Holders:       As listed on the applicable Holder Signature
          (other than Holders of   Page
          Series Three Preferred Units)

          with a copy to:          Willkie Farr & Gallagher
                                   787 Seventh Avenue
                                   New York, NY 10019
                                   Attn: Bruce M. Montgomerie, Esq.
                                   Telecopy: (212) 728-8111

          If to Holders of Series
          Three Preferred Units:   As listed on the applicable Holder Signature
                                   Page

          with a copy to:          O'Melveny & Myers LLP
                                   Embarcadero Center West
                                   275 Battery Street
                                   San Francisco, CA 94111
                                   Attn: Stephen A. Cowan, Esq.
                                   Telecopy: (415) 984-8701

In addition to the manner of notice permitted above, notices given pursuant to
Sections 9 and 10 hereof may be effected telephonically and confirmed in writing
thereafter in the manner described above.

                                       18

 
     15.  Successors and Assigns.  This Agreement shall be binding upon the
          ----------------------                                           
parties hereto and their respective successors and assigns and shall inure to
the benefit of the parties hereto and their respective successors and assigns.
This Agreement may not be assigned by any Holder and any attempted assignment
hereof by any Holder will be void and of no effect and shall terminate all
obligations of the Company hereunder; provided, that any Holder may assign its
                                      --------  ----                          
rights hereunder to any person to whom such Holder may Dispose of Shares and/or
Units pursuant to Section 2 hereof.

     16.  Counterparts.  This Agreement may be executed in any number of
          ------------                                                  
counterparts and by the parties hereto in separate counterparts, each of which
when so executed shall be deemed to be an original and all of which taken
together shall constitute one and the same agreement.

     17.  Governing Law.  This Agreement shall be governed by and construed in
          -------------                                                       
accordance with the laws of the State of Delaware applicable to contracts made
and to be performed wholly within said State.

     18.  Severability.  In the event that any one or more of the provisions
          ------------                                                      
contained herein, or the application thereof in any circumstances, is held
invalid, illegal or unenforceable in any respect for any reason, the validity,
legality and enforceability of any such provision in every other respect and of
the remaining provisions contained herein shall not be in any way impaired
thereby, it being intended that all of the rights and privileges of the parties
hereto shall be enforceable to the fullest extent permitted by law.

     19.  Entire Agreement.  This Agreement is intended by the parties as a
          ----------------                                                 
final expression of their agreement and intended to be the complete and
exclusive statement of the agreement and understanding of the parties hereto in
respect of the subject matter contained herein.  There are no restrictions,
promises, warranties or undertakings, other than those set forth or referred to
herein, with respect to such subject matter.  This Agreement supersedes all
prior agreements and understandings between the parties with respect to such
subject matter.

                                       19

 
     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the date first written above.


                                    BOSTON PROPERTIES, INC.



                                    By: /s/ William J. Wedge
                                       ------------------------------------
                                        Name: William J. Wedge
                                        Title: Senior Vice President


                                    BOSTON PROPERTIES LIMITED
                                    PARTNERSHIP

                                    By:  Boston Properties, Inc.,
                                         its general partner


                                      By: /s/ William J. Wedge
                                         ----------------------------------
                                          Name: William J. Wedge
                                          Title: Senior Vice President

                                       20

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              THREE EMBARCADERO CENTER WEST,
                              a California limited partnership

                              By: THE PRUDENTIAL INSURANCE 
                                  COMPANY OF AMERICA, a New Jersey 
                                  corporation, General Partner

                                  By:   /s/ Gary L. Frazier
                                        -------------------------------------
                                        Name: Gary L. Frazier
                                        Title: Vice President

                                       21

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              Rockmark Corporation

                              /s/ Richard E. Salomon
                              --------------------------------------------
                              By: Richard E. Salomon, President

                                       22

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              Louis R. Benzak

                              By: Rockmark Corporation, attorney-in-fact

                              /s/ Richard E. Salomon
                              --------------------------------------------
                              Name: Richard E. Salomon, President

                                       23

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              John R. H. Blum

                              By: Rockmark Corporation, attorney-in-fact

                              /s/ Richard E. Salomon
                              --------------------------------------------
                              Name: Richard E. Salomon, President

                                       24

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              James R. Bronkema Trust

                              By: Rockmark Corporation, attorney-in-fact

                              /s/ Richard E. Salomon
                              --------------------------------------------
                              Name: Richard E. Salomon, President

                                       25

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              Vincent deP. Farrell

                              By: Rockmark Corporation, attorney-in-fact

                              /s/ Richard E. Salomon
                              --------------------------------------------
                              Name: Richard E. Salomon, President

                                       26

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              Leslie H. Larsen

                              By: Rockmark Corporation, attorney-in-fact

                              /s/ Richard E. Salomon
                              --------------------------------------------
                              Name: Richard E. Salomon, President

                                       27

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              Bruce M. Montgomerie

                              By: Rockmark Corporation, attorney-in-fact

                              /s/ Richard E. Salomon
                              --------------------------------------------
                              Name: Richard E. Salomon, President

                                       28

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              Bill F. Osborne

                              By: Rockmark Corporation, attorney-in-fact

                              /s/ Richard E. Salomon
                              --------------------------------------------
                              Name: Mr. Richard E. Salomon, President

                                       29

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              William F. Pounds

                              By: Rockmark Corporation, attorney-in-fact

                              /s/ Richard E. Salomon
                              --------------------------------------------
                              Name: Mr. Richard E. Salomon, President

                                       30

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              David Rockefeller

                              By: Rockmark Corporation, attorney-in-fact

                              /s/ Richard E. Salomon
                              --------------------------------------------
                              Name: Mr. Richard E. Salomon, President

                                       31

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              DR & Descendants Partnership

                              By: Rockmark Corporation, attorney-in-fact

                              /s/ Richard E. Salomon
                              --------------------------------------------
                              Name: Mr. Richard E. Salomon, President

                                       32

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              Estate of Richard B. Salomon

                              By: Rockmark Corporation, attorney-in-fact

                              /s/ Richard E. Salomon
                              -------------------------------------------
                              Name: Mr. Richard E. Salomon, President

                                       33

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
 
                               /s/ Richard E. Salomon
                               --------------------------------------------
                               Name: Mr. Richard E. Salomon

                                       34

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              Salomon 1968 Trust

                              By: Rockmark Corporation, attorney-in-fact

                              /s/ Richard E. Salomon
                              --------------------------------------------
                              Name: Mr. Richard E. Salomon, President

                                       35

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              Salomon 1969 Trust

                              By: Rockmark Corporation, attorney-in-fact

                              /s/ Richard E. Salomon
                              --------------------------------------------
                              Name: Mr. Richard E. Salomon, President

                                       36

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              William G. Spears

                              By: Rockmark Corporation, attorney-in-fact

                              /s/ Richard E. Salomon
                              --------------------------------------------
                              Name: Mr. Richard E. Salomon, President

                                       37

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              George M. Topliff

                              By: Rockmark Corporation, attorney-in-fact

                              /s/ Richard E. Salomon
                              --------------------------------------------
                              Name: Mr. Richard E. Salomon, President

                                       38

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              John O. Wolcott

                              By: Rockmark Corporation, attorney-in-fact

                              /s/ Richard E. Salomon
                              --------------------------------------------
                              Name: Richard E. Salomon, President

                                       39

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              Fedmark Corporation

                              By: Rockmark Corporation, attorney-in-fact

                              /s/ Richard E. Salomon
                              --------------------------------------------
                              Name: Richard E. Salomon, President

                                       40

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              ECW Investor Associates

                              By: Rockmark Corporation, attorney-in-fact

                              /s/ Richard E. Salomon
                              --------------------------------------------
                              Name: Richard E. Salomon, President

                                       41

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              Realrock I

                              By: Rockmark Corporation, attorney-in-fact

                              /s/ Richard E. Salomon
                              --------------------------------------------
                              Name: Richard E. Salomon, President

                                       42

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              ECW Claymark, Investors

                              By: Rockmark Corporation, attorney-in-fact

                              /s/ Richard E. Salomon
                              --------------------------------------------
                              Name: Richard E. Salomon, President

                                       43

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              WR Trust

                              By: Rockmark Corporation, attorney-in-fact

                              /s/ Richard E. Salomon
                              --------------------------------------------
                              Name: Richard E. Salomon, President

                                       44

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              EC Holdings, Inc.

                              [Signature Illegible]

                                       45

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


 
                              Portman Family Trust

                              By:  /s/ John C. Portman, Jr.
                                   -----------------------------------------

                              By:  /s/ Joan N. Portman
                                   -----------------------------------------

                              By:  /s/ John C. Portman III
                                   -----------------------------------------
 

                                      46

 

                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


                                         WRTEC, Inc.

                                         
                                         By: /s/ Marion Burton
                                            -------------------------------
                                            Name: Marion Burton, President


                                      47

 
                   REGISTRATION RIGHTS AND LOCK-UP AGREEMENT
                             HOLDER SIGNATURE PAGE


     Reference is made to that certain Registration Rights and Lock-Up Agreement
(the "Registration Rights Agreement") entered into on November 12, 1998 by and
      -----------------------------                                           
among Boston Properties, Inc., Boston Properties Limited Partnership, and the
Holders named therein.  The undersigned, by its execution hereof, agrees to be
bound by all the terms of a Holder thereunder.


                                        Winrock International Institute for
                                        Agricultural Development

         
                                        By:   /s/ Byron T. Edwards
                                              ---------------------------------
                                        Name: Byron T. Edwards, Presedent & CEO
                                                     



                                      48


 
                                                                      SCHEDULE A

                                LIST OF HOLDERS
                                ---------------

                          SERIES TWO PREFERRED UNITS

Rockmark Corporation
Louis R. Benzak
John R.H. Blum
James R. Bronkema Trust
Vincent deP. Farrell, Jr.
Leslie H. Larsen
Bruce M. Montgomerie
Bill F. Osborne
EC HOLDINGS, INC.
Portman Family Trust
William F. Pounds
David Rockefeller
DR & Descendants Partnership
Estate of Richard B. Salomon
Richard E. Salomon
Salomon 1968 Trust
Salomon 1969 Trust
William G. Spears
George M. Topliff
Winrock International Institute for Agricultural Development
WRTEC, INC.
John O. Wolcott
Fedmark Corporation
ECW Investor Associates
Realrock I
ECW Claymark Investors
WR Trust

                         SERIES THREE PREFERRED UNITS

One Embarcadero Center Venture
Three Embarcadero Center Venture
Four Embarcadero Center Venture
Three Embarcadero Center West

                                       49


 
                                                                    EXHIBIT 99.7

                          THIRD AMENDED AND RESTATED
                             PARTNERSHIP AGREEMENT

                                      OF

                        ONE EMBARCADERO CENTER VENTURE

 
                               TABLE OF CONTENTS

Page ---- ARTICLE 1 - THE PARTNERSHIP................................................................................... 2 SECTION 1.1 Continuation of the Partnership...................................................... 2 SECTION 1.2 Partnership Name..................................................................... 3 SECTION 1.3 Place of Business.................................................................... 3 SECTION 1.4 General Partnership.................................................................. 3 SECTION 1.5 Term of Partnership.................................................................. 3 SECTION 1.6 Purposes of the Partnership.......................................................... 3 SECTION 1.7 Definitions.......................................................................... 4 ARTICLE 2 - CAPITALIZATION.................................................................................... 7 SECTION 2.1 Partners' Percentage Interests....................................................... 7 SECTION 2.2 Additional Capital Contributions; Limitations on Future Capital Contributions; Obligation of Managing Partner to Purchase BP Notes.................................................................... 7 SECTION 2.3 Admission of Additional Partners..................................................... 8 SECTION 2.4 Return of Capital Accounts and Redemption of Partnership Interests............................................................................ 8 SECTION 2.5 Investment Loan, Equity Redemption Loan, Prudential Guarantied Loan, Existing Loans and Replacement Loans................................ 8 ARTICLE 3 - ALLOCATIONS OF PROFITS AND LOSSES................................................................. 9 SECTION 3.1 Capital Accounts and Allocations of Profit and Loss.................................. 9 ARTICLE 4 - DISTRIBUTIONS..................................................................................... 11 SECTION 4.1 Distributions........................................................................ 11 SECTION 4.2 Amounts Withheld..................................................................... 11 ARTICLE 5 - MANAGEMENT OF THE PARTNERSHIP..................................................................... 11 SECTION 5.1 Management........................................................................... 11 SECTION 5.2 Rights to Delegate and Employ........................................................ 11 SECTION 5.3 Enumeration of Specific Rights and Powers............................................ 12 SECTION 5.4 Limitations on Managing General Partner's Authority.................................. 13 SECTION 5.5 Filing of Returns and Other Writings................................................. 14 SECTION 5.6 Other Permissible Activities......................................................... 15
(i)
Page ---- SECTION 5.7 Contracts with Affiliates; Borrowing from Partners................................... 15 SECTION 5.8 Indemnification...................................................................... 15 SECTION 5.9 Liability of the Managing General Partner............................................ 17 SECTION 5.10 Other Matters Concerning the Managing General Partner................................ 18 ARTICLE 6 - ACCOUNTING........................................................................................ 18 SECTION 6.1 Fiscal Year and Tax Accounting Method................................................ 18 SECTION 6.2 Books, Records, and Tax Reports...................................................... 19 SECTION 6.3 Accounting Practice.................................................................. 19 SECTION 6.4 Accountants.......................................................................... 19 SECTION 6.5 Bank Accounts........................................................................ 19 ARTICLE 7 - RIGHTS AND OBLIGATIONS OF THE NON-MANAGING........................................................ 19 SECTION 7.1 Contributions by Non-Managing General Partners....................................... 19 SECTION 7.2 Corporate Authority.................................................................. 19 SECTION 7.3 Role of Non-Managing General Partners................................................ 19 SECTION 7.4 Rights and Obligations Under the Act................................................. 20 SECTION 7.5 Redemption Rights.................................................................... 20 ARTICLE 8 - WITHDRAWAL AND REPLACEMENT OF PARTNERS AND........................................................ 20 SECTION 8.1 Non-Managing General Partners........................................................ 20 SECTION 8.2 Managing General Partner............................................................. 20 SECTION 8.3 Transfer of Partnership Interests.................................................... 20 SECTION 8.4 Substituted Non-Managing General Partners............................................ 21 SECTION 8.5 Assignees............................................................................ 22 ARTICLE 9 - DISSOLUTION, LIQUIDATION AND TERMINATION.......................................................... 22 SECTION 9.1 Dissolution.......................................................................... 22 SECTION 9.2 Liquidation.......................................................................... 22 ARTICLE 10 - MISCELLANEOUS.................................................................................... 24 SECTION 10.1 Redemption Agreement................................................................. 24 SECTION 10.2 Notice............................................................................... 24 SECTION 10.3 Further Assurances................................................................... 24 SECTION 10.4 Agreement in Counterparts............................................................ 24 SECTION 10.5 Construction......................................................................... 24
(ii)
Page ---- SECTION 10.6 Governing Law........................................................................ 24 SECTION 10.7 Amendments........................................................................... 24 SECTION 10.8 Pronouns............................................................................. 24 SECTION 10.9 Successors in Interest............................................................... 25 SECTION 10.10 Headings............................................................................. 25 SECTION 10.11 Consent to Jurisdiction and Service of Process....................................... 25 SECTION 10.12 Waiver of Jury Trial................................................................. 25
(iii) SCHEDULES AND EXHIBITS Schedule A Partners and Percentage Interests Exhibit A Legal Description of Property Exhibit B Approved Terms and Conditions of Loans from Managing General Partner Exhibit C Description of Equity Redemption Loan Exhibit D Description of Prudential Guarantied Loan Exhibit E Description of Business Interruption and General Liability Insurance Exhibit F Description of Financing Plan for the Partnership Exhibit G Form of Special BP Loan Note (iv) THIRD AMENDED AND RESTATED PARTNERSHIP AGREEMENT OF ONE EMBARCADERO CENTER VENTURE This THIRD AMENDED AND RESTATED PARTNERSHIP AGREEMENT OF ONE EMBARCADERO CENTER VENTURE (this "Agreement") is entered into and shall be effective as of --------- the 12th day of November, 1998, by and between Boston Properties LLC, a Delaware limited liability company, having a mailing address c/o Boston Properties, Inc., 8 Arlington Street, Boston, Massachusetts 02116, as managing general partner ("BPLLC" or the "Managing General Partner"), BP EC1 Holdings LLC, a Delaware ------ ------------------------ limited liability company, having a mailing address c/o Boston Properties, Inc., 8 Arlington Street, Boston, Massachusetts 02116, as non-managing general partner ("Holdings LLC"), and PIC Realty Corporation, a Delaware corporation, having a ------------ mailing address c/o Prudential Realty Group, 8 Campus Drive, 4th Floor - Arbor Circle South, Parsippany, New Jersey 07054 ("PIC"), as non-managing general --- partner. Holdings LLC and PIC are sometimes hereinafter referred to as the "Non-Managing General Partners" and each as a "Non-Managing General Partner." ----------------------------- ---------------------------- The Managing General Partner and the Non-Managing General Partners are sometimes hereinafter referred to as the "Partners." -------- RECITALS: A. ONE EMBARCADERO CENTER VENTURE (the "Partnership") is a California ----------- general partnership formed pursuant to and governed by that certain Agreement of Partnership dated as of January 1, 1973, creating a general partnership named Block 230 Associates, and as subsequently amended on March 1, 1973 and June 10, 1977, amended and restated on January 1, 1979, and further amended on September 1, 1979, December 29, 1986, December 31, 1986, January 1, 1992 and September 28, 1998 (as revised to such date, the "Prior Partnership Agreement"). --------------------------- B. The Partnership owns and has in operation that certain parcel of real property situated in the City and County of San Francisco, California, and more particularly described on Exhibit A hereto, upon which is erected an office --------- building, related improvements and personal property owned by the Partnership and situated thereon or therein, known generally as One Embarcadero Center (the "Real Property"). ------------- C. On September 30, 1998, the interest of Fedmark Corporation, a Delaware corporation ("Fedmark"), in the Partnership was redeemed for cash. Following ------- such redemption, all of the outstanding partnership interests in the Partnership were held by PIC, with a 50.016956% partnership interest, and Embarcadero Center Investors Partnership, a California limited partnership ("ECIP"), with a ---- 49.983044% partnership interest. D. Pursuant to that certain Master Transaction Agreement, dated September 28, 1998 (the "Master Transaction Agreement"), by and among (i) The Prudential ---------------------------- Insurance Company of America, a New Jersey corporation, PIC, Fedmark, ECIP, Pacific Property Services, L.P., a California limited partnership, and the other persons identified therein on Exhibit A-1 thereto, on the one hand, and (ii) ----------- Boston Properties Limited Partnership, a Delaware limited partnership (the "Operating Partnership"), and Boston Properties, Inc., a Delaware corporation --------------------- ("Public Company") on the other hand, the Operating Partnership acquired the -------------- right, subject to the satisfaction of various conditions, to have all of the partners of ECIP contribute to the Operating Partnership all of their interests in ECIP. On November 12, 1998, following the redemption of Fedmark as a partner of the Partnership as described in the preceding paragraph, the closing of the transactions contemplated by the Master Transaction Agreement occurred, and the Operating Partnership directed the partners of ECIP to convey their interests in ECIP to Holdings LLC and the partners of ECIP did so convey their interests in ECIP to Holdings LLC (which conveyance constituted a contribution to the Operating Partnership). Upon such conveyance, by operation of law ECIP dissolved and Holdings LLC succeeded to ECIP's 49.983044% partnership interest in the Partnership. Prior to the amendment and restatement of this Agreement, Holdings LLC conveyed to BPLLC a 0.499830% partnership interest in the Partnership. As a result of the foregoing, (i) ECIP and Fedmark (the "Withdrawing Partners") have ceased to be partners of the Partnership, (ii) -------------------- BPLLC and Holdings LLC have been admitted as partners of the Partnership, and (iii) as of the date hereof BPLLC, PIC and Holdings LLC are the sole partners of the Partnership with percentage interests of 0.499830%, 50.016956% and 49.483214%, respectively. E. To reflect the transfers, successions, admissions and withdrawals recited above, to provide for the continuation of the Partnership as a California general partnership under the Act, and to provide for the revised terms and conditions under which the Partnership will continue in existence and be governed, the parties wish to amend and restate the Prior Partnership Agreement in its entirety, as provided herein. NOW, THEREFORE, in consideration of the foregoing, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows: I. Transfer of Partnership Interests. Pursuant to the transactions --------------------------------- described in the Recitals above, the Withdrawing Partners have ceased to be partners in the Partnership, BPLLC has been admitted as the Managing General Partner of the Partnership with a 0.499830% Percentage Interest and Holdings LLC has been admitted as a Non-Managing General Partner of the Partnership with a 49.483214% Percentage Interest. PIC shall continue as a Non-Managing General Partner of the Partnership with a 50.016956% Percentage Interest. II. Amendment and Restatement. The Original Partnership Agreement is ------------------------- hereby amended and restated in its entirety as follows: 2 ARTICLE 1 - THE PARTNERSHIP SECTION 1.1 Continuation of the Partnership. ------------------------------- The Partners hereby agree to continue the Partnership as a general partnership under and pursuant to the Uniform Partnership Act of the State of California (the "Act") as the same is now or hereafter amended. The Partners --- shall promptly execute, and the Managing General Partner shall promptly cause to be filed with the proper offices, any certificate or amendments thereto required by the Act or any other applicable partnership act, fictitious name act, or similar statute in effect, or for any reasonable purpose. SECTION 1.2 Partnership Name. ---------------- The name of the Partnership shall continue to be "ONE EMBARCADERO CENTER VENTURE." All business of the Partnership shall be conducted under such name or under such variations thereof as the Managing General Partner deems necessary or appropriate to comply with the requirements of law in any applicable jurisdiction in which the Partnership may do business. SECTION 1.3 Place of Business. ----------------- The principal place of business of the Partnership shall be c/o Boston Properties, Inc., Four Embarcadero Center, Suite 2600, San Francisco, California 94111, or at such other place or places as the Managing General Partner may designate. SECTION 1.4 General Partnership. ------------------- The Partnership shall be a general partnership, governed by the Act. The interests of the Partners in the Partnership shall be personal property for all purposes. All real and other property owned by the Partnership shall be deemed owned by the Partnership, as a partnership, and no Partner, individually, shall have any ownership of such property. SECTION 1.5 Term of Partnership. ------------------- The term of the Partnership shall continue until 12:00 noon on December 31, 2050, unless sooner terminated in accordance with the terms and conditions of this Agreement, or by applicable law. 3 SECTION 1.6 Purposes of the Partnership. --------------------------- The purpose of the Partnership shall be: (a) to own, manage, develop, improve, renovate, rehabilitate, operate, hold for investment, lease, encumber, mortgage, pledge, assign, exchange, sell and/or otherwise deal with the Property; (b) to retain managing agents and consultants therefor, and to do all things necessary or useful in connection with any of the foregoing; (c) in addition to, and in furtherance of these purposes and powers, the Partnership shall have the power (i) to borrow money and issue evidences of indebtedness and to secure same by mortgage, pledge or other lien (including, without limitation, obtaining the Equity Redemption Loan and Prudential Guarantied Loan), and (ii) to guarantee the obligations of any other Person when done in furtherance of the Partnership's business, including any indebtedness of such Person, and to secure such guarantee obligations by mortgage, pledge or other lien on any asset of the Partnership; (d) to make and service the Investment Loan as contemplated herein; (e) subject to the express terms, provisions and restrictions of this Agreement, to engage in and consummate the transactions described in the Master Transaction Agreement; (f) to enter into the Redemption Agreement and consummate the transactions described therein; and (g) to enter into, perform and carry out contracts of any kind necessary to, or in connection with, or incidental to the accomplishment of any of the foregoing purposes; and (h) to use the Excess Mortgage Loan Proceeds to make the Special BP Loan. The Partnership shall not engage in any other business. It is further agreed that the Partnership shall at all times adhere to at least the level of quality in the maintenance and operation of the Property as a first class office and retail complex as maintained by the Partnership during the twelve (12) month period preceding the date hereof. SECTION 1.7 Definitions. ----------- 4 In addition to the capitalized terms defined in the recitals and elsewhere herein, the following terms shall have the following meanings: "Act" has the meaning set forth in Section 1.1 hereof. --- "Affiliate" means, with respect to any Person, any Person directly or --------- indirectly controlling, controlled by or under common control with such Person. For purposes of this definition, "control," when used with respect to any Person, means the power to direct the management and policies of such Person, directly or indirectly, whether through the ownership of voting securities, by contract or otherwise, and the terms "controlling" and "controlled" have meanings correlative to the foregoing. No officer, director or equity owner of the Managing General Partner shall be considered an Affiliate of the Managing General Partner solely as a result of serving in such capacity or being an equity owner of the Managing General Partner. "Approved Loan Costs" shall mean all fees, costs and expenses incurred by ------------------- the Partnership or any Partner in connection with the Equity Redemption Loan or Prudential Guarantied Loan that are expressly approved by each of the Partners (which approval shall not be unreasonably withheld, conditioned or delayed), including, without limitation, (i) all fees and expenses of the lender(s) thereof subject to reimbursement by the Partnership or any Partner, and (ii) all of the reasonable legal fees and expenses incurred directly by such Persons (or any of their constituent owners) in connection with the Equity Redemption Loan and the Prudential Guarantied Loan. "Borrowing Costs" of a loan shall mean the cost of procuring and repaying --------------- such loan expressed as an "all-in" effective annual interest rate per annum to be determined taking into account all costs of procuring and repaying such loan including, without limitation, all (i) periodic interest and other amounts due and payable in connection with such loan, (ii) all loan points and fees paid with respect to such loan, (iii) all fees and expenses of the lender(s) thereof that are subject to payment or reimbursement by the borrower in connection therewith, and (iv) all legal fees and expenses incurred by the borrower in connection therewith; provided that, all points, fees, costs and expenses will -------- ---- be amortized on a straight-line basis over the term of the loan. "BP Note" means a note, in the form and for a purpose described in Exhibit ------- ------- B hereto, given by the Partnership to the Managing General Partner or any of its - - Affiliates. "BP Partners" means Boston Properties LLC, the Managing General Partner, ----------- and BP EC1 Holdings LLC, a Non-Managing General Partner. "Capital Contributions" means, with respect to any Partner, the amount of --------------------- money and the initial fair market value of any property (other than money) contributed to the Partnership with respect to the interest in the Partnership held by such Person less the amount of liabilities to which such property is subject and which the Partnership is considered to assume pursuant to the provisions of Section 752 of the Code (as defined below). 5 "Code" means the Internal Revenue Code of 1986, as amended from time to ---- time (or any corresponding provisions of succeeding law). "Equity Redemption Loan" shall mean a loan to the Partnership governed by ---------------------- the term loan agreement particularly described on Exhibit C attached hereto, a --------- true, correct and complete copy of which has been delivered to each of the Partners prior to the date hereof. "Equity Redemption Loan" shall also include any extension or modification of the Equity Redemption Loan and any new loan obtained by the Partnership to replace or refinance the Equity Redemption Loan; provided that, any such extension, modification or new loan shall be in - -------- ---- compliance with the terms and provisions of this Agreement and the Redemption Agreement. "Excess Mortgage Loan Proceeds" shall mean the excess proceeds of any new ----------------------------- mortgage loan borrowing secured by the Real Property over and above the amounts of such proceeds used to (i) repay any existing mortgage debt secured by the Real Property prior to the date hereof, (ii) pay any prepayment penalty, premium or fee in connection with any such existing mortgage loan that is repaid, and (iii) pay the transaction costs incurred by the Partnership in connection with such borrowing or the prepayment of any existing mortgage loan. "Indemnitee" means (i) any Person made a party to a claim or proceeding by ---------- reason of (A) his or its status as a Partner, or as a director or officer of the Partnership or a Partner, or (B) his or its liabilities, pursuant to a loan guarantee or otherwise, for any indebtedness of the Partnership (including, without limitation, any indebtedness which the Partnership has assumed or taken assets subject to); and (ii) such other Persons (including Affiliates of a Partner or the Partnership) as the Managing General Partner may reasonably designate from time to time (whether before or after the event giving rise to potential liability), for a purpose related to Partnership business. "Interest Rate Approved Loan Costs" has the meaning given thereto in --------------------------------- Section 2.5(e)(i). "Investment Loan" shall mean a loan made by the Partnership to the --------------- Investment Loan Borrower in an aggregate amount equal to $88,200,000 pursuant to (and in accordance with the terms and provisions of) that certain Note Purchase Agreement of even date herewith, by and between the Partnership and Investment Loan Borrower. "Investment Loan Borrower" shall mean Prudential Realty Securities, Inc., a ------------------------ Delaware corporation. "Investment Notes" means the promissory notes of the Investment Loan ---------------- Borrower acquired by the Partnership in connection with the Investment Loan. "Non-Managing General Partner" means BP EC1 Holdings LLC, a Delaware ---------------------------- limited liability company, and PIC Realty Corporation, a Delaware corporation, and any other Person who may become a Non-Managing General Partner pursuant to the terms of this Agreement, in each such case until such Person has ceased to be a Non-Managing General Partner pursuant to 6 the terms of this Agreement. "Non-Managing General Partners" means all such Persons, if there is more than one. If at any time there is more than one Non- Managing General Partner, then all references herein to the Non-Managing General Partner shall, unless the context requires otherwise, be deemed to refer to the Non-Managing General Partners. "Managing General Partner" means Boston Properties LLC, a Delaware limited ------------------------ liability company, and any other Person who may become a Managing General Partner pursuant to the terms of this Agreement, in either case until such Person has ceased to be a Managing General Partner pursuant to the terms of this Agreement. "Partnership" means the partnership governed by this Agreement and any ----------- partnership continuing the business of the Partnership in the event of dissolution as herein provided. "Percentage Interest" means, with respect to any Partner, the Percentage ------------------- Interest set forth opposite such Partner's name on Schedule A. In the event any ---------- Partner's interest in the Partnership is transferred in accordance with the provisions of this Agreement, the transferee of such interest shall succeed to the Percentage Interest of his transferor to the extent it relates to the transferred interest. "Person" means any individual, partnership, corporation, trust, or other ------ entity. "Property" shall mean the Real Property, including all real property, -------- improvements, leases, licenses, fixtures and tangible and intangible personal property (including, without limitation, cash, deposit accounts, money and other sums and Investment Notes so long as the Partnership holds the same) owned by the Partnership from time to time. "Prudential Guarantied Loan" shall mean a loan to the Partnership governed -------------------------- by the term loan agreement particularly described on Exhibit D attached hereto, --------- a true, correct and complete copy of which has been delivered to each of the Partners prior to the date hereof. "Redemption Agreement" shall mean that certain Redemption Agreement of even -------------------- date herewith, by and among the Partnership and each of the Partners. "Redemption Distribution" means the distribution to PIC, in full redemption ----------------------- of its interest in the Partnership, of all or a portion of the Investment Notes and, if applicable, cash, as determined in accordance with the Redemption Agreement. "Regulations" means the Income Tax Regulations promulgated under the Code, ----------- as such regulations may be amended from time to time (including corresponding provisions of succeeding regulations). "Special BP Loan" shall mean a loan in the principal amount equal to the --------------- Excess Mortgage Loan Proceeds and at an interest rate per annum equal to twelve (12) basis points above the Borrowing Costs of the Excess Mortgage Loan Proceeds, made by the Partnership to 7 any BP Partner, or any Affiliate of any BP Partner and evidenced by a promissory note in the form of Exhibit G attached hereto. --------- "Transfer" means, as a noun, any voluntary or involuntary transfer, sale, -------- pledge, hypothecation, or other disposition and, as a verb, voluntarily or involuntarily to transfer, sell, pledge, hypothecate, or otherwise dispose of. ARTICLE 2 - CAPITALIZATION SECTION 2.1 Partners' Percentage Interests. ------------------------------ The names and Percentage Interests of the Partners are set forth on Schedule A hereto. - ---------- SECTION 2.2 Additional Capital Contributions; Limitations on Future ------------------------------------------------------- Capital Contributions; Obligation of Managing Partner to -------------------------------------------------------- Purchase BP Notes. ----------------- (a) No Partner shall, except as otherwise required by the Act, other applicable law or this Agreement, be required to make any further Capital Contributions to the Partnership, and so long as PIC or any Affiliate of PIC is a Partner, no Capital Contributions shall be made to the Partnership without the prior written consent of PIC. (b) At no time prior to the second anniversary of the Redemption Distribution shall the Managing General Partner call or accept Capital Contributions from any Partner for the purpose of repaying the Equity Redemption Loan or any debt replacing or refinancing the Equity Redemption Loan, and during such period no Capital Contributions made after the date hereof shall be used in such manner. (c) To the extent that it is necessary or desirable for the Partnership, in the sole discretion of the Managing General Partner, to raise cash for the purpose of funding working capital, capital expenditures, leasing commissions, tenant improvements or other expenditures relating to the Property at a time when the Partnership is unable to raise such cash through the receipt of Capital Contributions because of the prohibition set forth in Section 2.2(a), the Managing General Partner agrees that it (or an Affiliate of the Managing General Partner) will lend funds to the Partnership for such purposes by purchasing BP Notes from the Partnership. SECTION 2.3 Admission of Additional Partners. -------------------------------- The Managing General Partner shall have the right, from time to time, provided it obtains the consent of the Non-Managing General Partners, to admit additional Non-Managing General Partners to the Partnership. 8 Upon the admission of any new Non-Managing General Partner, an amendment of this Agreement, reflecting such change, shall be signed by the Managing General Partner and the additional Non-Managing General Partner, and an amendment to the Certificate, reflecting such change, to the extent required or appropriate under applicable law, shall be signed by all Partners either individually or by the Managing General Partner on their behalf and filed with the Secretary of State of the State of California. SECTION 2.4 Return of Capital Accounts and Redemption of Partnership -------------------------------------------------------- Interests. --------- Except as otherwise provided in this Agreement or as set forth in the Redemption Agreement, (i) no Partner shall have the right to demand and withdraw a return of its Capital Account, and (ii) no Partner shall have the right to receive property other than cash upon a distribution to the Partners, redemption of any Partner's interest or liquidation of the Partnership. No Partner shall receive any interest, salary, or drawing with respect to its Capital Contributions or its Capital Account or for services rendered on behalf of the Partnership or otherwise in its capacity as Partner, except (i) interest received, if any, on BP Notes or (ii) as otherwise provided in this Agreement. SECTION 2.5 Investment Loan, Equity Redemption Loan, Prudential --------------------------------------------------- Guarantied Loan, Existing Loans and Replacement Loans. ----------------------------------------------------- (a) The Partnership is hereby authorized to, and shall, make the Investment Loan to Investment Loan Borrower and acquire the Investment Notes on the date hereof. (b) The Partnership is hereby authorized to, and shall, borrow the Equity Redemption Loan and Prudential Guarantied Loan on the date hereof and shall thereafter perform its obligations in respect thereof subject to the terms and limitations of this Agreement. The proceeds of the Equity Redemption Loan and Prudential Guarantied Loan shall be applied to make the Investment Loan and acquire the Investment Notes on the date hereof. (c) In accordance with Section 2.2(b), the Partnership shall not, at any time prior to the second anniversary of the Redemption Date, use Capital Contributions made after the date hereof for the purpose of repaying the Equity Redemption Loan or any debt replacing the Equity Redemption Loan. (d) Except as otherwise expressly provided in this Agreement, all costs, fees, penalties and expenses incurred in connection with the satisfaction of any debt of the Partnership on the date hereof shall be paid by PIC, on the one hand, and the BP Partners, on the other hand, in accordance with the terms and provisions of Exhibit V to the Master Transaction Agreement. All Borrowing --------- Costs of the Excess Mortgage Loan Proceeds ("Excess Proceeds Borrowing Costs") ------------------------------- shall be paid by the Partnership and capitalized and amortized over the term of the loan from which the Excess Mortgage Loan Proceeds were derived. All other Borrowing Costs 9 incurred in connection with any Partnership borrowing (other than those described hereinabove and in subsection (e) below) shall be paid by the BP -------------- Partners. (e) Notwithstanding anything to the contrary provided in this Agreement, all costs, fees and expenses incurred in connection with the consummation of the Equity Redemption Loan and Prudential Guarantied Loan shall be paid by the Partnership and borne by the Partners (and reflected in the Partnership's books as follows): (i) Any and all Approved Loan Costs paid in order to reduce or lock the interest rate for the Equity Redemption Loan or Prudential Guarantied Loan (including, without limitation, interest rate lock fees and loan points charged to obtain a reduced, fixed or more favorable rate (collectively, "Interest Rate Approved Loan Costs")) shall be paid by the --------------------------------- Partnership and capitalized and amortized over the term of the appropriate loan; (ii) All other Approved Loan Costs shall be paid by the Partnership as current expenses and borne by each Partner in accordance with its Percentage Interest on the date hereof; (iii) Any other costs and expenses incurred by the Partnership with respect to the Equity Redemption Loan shall be paid by the BP Partners; and (iv) Any other costs and expenses incurred by the Partnership with respect to the Prudential Guarantied Loan shall be paid by PIC. ARTICLE 3 - ALLOCATIONS OF PROFITS AND LOSSES AND MAINTENANCE OF CAPITAL ACCOUNTS SECTION 3.1 Capital Accounts and Allocations of Profit and Loss. --------------------------------------------------- (a) Capital Accounts. A separate capital account (a "Capital ---------------- ------- Account") shall be maintained for each Partner in accordance with Section 1.704- 1(b)(2)(iv) of the Regulations, and this Section 3.1 shall be interpreted and applied in a manner consistent with such section of the Regulations. The Partnership may, at the election of the Managing General Partner, adjust the Capital Accounts of its Partners to reflect revaluations of the Partnership property whenever the adjustment would be permitted under Regulations Section 1.704-1(b)(2)(iv)(f). In the event that the Capital Accounts of the Partners are so adjusted, (i) the Capital Accounts of the Partners shall be adjusted in accordance with Regulations Section 1.704-1(b)(2)(iv)(g) for allocations of depreciation, depletion, amortization and gain or loss, as computed for book purposes, with respect to such property, and (ii) the Partners' distributive shares of depreciation, depletion, amortization and gain or loss, as computed for tax purposes, with respect to such property shall be determined so as to take account of the variation between the adjusted tax basis and book value of such property in the same manner as under Section 704(c) of the Code. In the event that 10 Code Section 704(c) applies to partnership property, the Capital Accounts of the Partners shall be adjusted in accordance with Regulations Section 1.704- 1(b)(2)(iv)(g) for allocations of depreciation, depletion, amortization and gain and loss, as computed for book purposes, with respect to such property. The Partners' distributive shares of depreciation, depletion, amortization and gain or loss, as computed for tax purposes, with respect to such property shall be determined so as to take account of the variation between the adjusted tax basis and book value of such property in the same manner as under Code Section 704(c), and the amount of upward and/or downward adjustments to the book value of the Partnership property shall be treated as income, gain, deduction and/or loss for purposes of applying the allocation provisions of this Article 3. In the event that Code Section 704(c) applies to Partnership property, the Capital Accounts of the Partners shall be adjusted in accordance with Regulations Section 1.704- 1(b)(2)(iv)(g) for allocations of depreciation, depletion, amortization and gain and loss, as computed for book purposes, with respect to such property. The amount of all distributions to Partners shall be determined pursuant to Section 4.1 hereof. Notwithstanding any provision contained herein to the contrary, no Partner shall be required to restore any negative balance in its Capital Account. (b) Allocation of Profit and Loss. Generally, all profits and losses ----------------------------- will be allocated in accordance with the Percentage Interests of the Partners. It is the intention of the Partners that all items of Partnership income, gain, loss, and deduction, as determined for book purposes, shall be allocated among the Partners, and shall be credited or debited to their respective Capital Accounts in accordance with Regulations Section 1.704(b)(2)(iv), so as to ensure to the maximum extent possible (i) that such allocations satisfy the economic effect equivalence test of Regulations Section 1.704(b)(2)(ii)(i), by allocating items that can have economic effect in such a manner that the balance of each Partner's Capital Account at the end of any taxable year (increased by such Partner's "share of Partnership minimum gain and Partner minimum gain", as defined in Regulations Section 1.704-2) would be positive in the amount of cash that such Partner would receive (or would be negative in the amount of cash that such Partner would be required to contribute to the Partnership) if the Partnership sold all of its property for an amount of cash equal to the book value (as determined pursuant to Regulations Section 1.704-1(b)(2)(iv)) of such property (reduced, but not below zero, by the amount of nonrecourse debt to which such property is subject) and all of the cash of the Partnership remaining after payment of all liabilities (other than nonrecourse liabilities) of the Partnership were distributed in liquidation immediately following the end of such taxable year pursuant to Article 9, and (ii) that all allocations of items that cannot have economic effect (including credits and nonrecourse deductions) are allocated to the Partners in accordance with the Partners' interests in the Partnership, which, unless otherwise required by Code Section 704(b) and the Regulations promulgated thereunder, shall be their Percentage Interests for the taxable year. (c) Section 704(c) Items. Except to the extent otherwise required by -------------------- the Code, Regulations Section 1.704-3 shall apply to all tax allocations governed by Code Section 704(c) and all "reverse section 704(c) allocations". The Managing General Partner shall determine the method of allocation to be used pursuant to Regulations Section 1.704-3 and shall make all elections under such section; provided, however, that with respect to the "reverse -------- ------- 11 Section 704(c) allocations," caused by the transfers contemplated by the Master Transaction Agreement, the Partnership will use the "traditional method without curative allocations." (d) The tax returns for the Partnership for the 1998 calendar year shall be prepared using the interim closing of the books method. ARTICLE 4 - DISTRIBUTIONS SECTION 4.1 Distributions. ------------- (a) Except as provided in Section 4.1(b) or Section 7.5, and subject to the needs of the Partnership to accumulate reserves, which prior to the Redemption Distribution shall be determined in the sole discretion of the Managing General Partner, distributions to the Partners shall be made in proportion to the Partners' Percentage Interests. Distributions shall be made from time to time at the discretion of the Managing General Partner. (b) Notwithstanding anything to the contrary provided in this Agreement, all payments in respect of title insurance received by the Partnership the amount of which was affected by the non-imputation endorsement to the Partnership's title insurance policy issued as of the date hereof with respect to the Property will be distributed only to the BP Partners in proportion to their respective Percentage Interests. SECTION 4.2 Amounts Withheld. ---------------- All amounts withheld pursuant to the Code or any provision of any state or local tax law with respect to any payment or distribution to the Partnership, the Managing General Partner or the Non-Managing General Partners shall be treated as amounts distributed to the Managing General Partner or Non-Managing General Partners pursuant to this Article for all purposes under this Agreement. The Managing General Partner may allocate any such amounts among the Partners in any manner that is in accordance with applicable law. ARTICLE 5 - MANAGEMENT OF THE PARTNERSHIP SECTION 5.1 Management. ---------- The management powers over the business and affairs of the Partnership are and shall be exclusively vested in the Managing General Partner, who shall be subject to the provisions of this Agreement and to applicable law, and, subject to the consent rights set forth in Section 5.4 hereof, no Non-Managing General Partner shall have any right to participate in or exercise control or management power over the business and affairs of the Partnership. 12 SECTION 5.2 Rights to Delegate and Employ. ----------------------------- The Managing General Partner shall devote such time and effort to the Partnership as it deems necessary and may retain agents as reasonably required or desirable to assist it. The Managing General Partner shall review the status and condition of the Property and shall supervise the activities of any agents engaged by it. The Managing General Partner may delegate any of its powers, rights and obligations hereunder, and, in furtherance of any such delegation, may appoint, employ, contract or otherwise deal with any Person (including Affiliates, but only so long as such employment, contract or other deal is not less favorable to the Partnership than would be an arms-length transaction on market terms) for the transaction of the business of the Partnership, which Persons may, under the supervision of the Managing General Partner, perform any acts or services for the Partnership as the Managing General Partner may approve. SECTION 5.3 Enumeration of Specific Rights and Powers. ----------------------------------------- Subject to Section 5.4, the Managing General Partner shall have all the rights and powers which may be possessed by a general partner in a partnership formed under the Act, which are otherwise conferred by law or which are necessary, advisable or convenient to the discharge of duties under this Agreement and to the management, direction and control of the business and affairs of the Partnership, exercisable without the consent of the Non-Managing General Partners (except as herein expressly provided), including the following rights and powers: (a) to conduct the tax, financial and business affairs of the Partnership; (b) to take all action necessary to acquire, purchase, renovate, rehabilitate, hold, own, improve, operate, encumber, mortgage, pledge, assign, exchange, or to sign notes or guarantee payment of any loans relating to the purposes of the Partnership; (c) to manage, repair, insure, service, promote, advertise, lease, sublease, and create or release interests in the Partnership property; (d) to timely pay out of Partnership funds such expenses as are necessary to carry out the intentions and purposes of the Partnership including real estate taxes and debt service payments to the extent there is sufficient gross cash proceeds. (e) to sell and/or otherwise dispose of all or any portion of the Property; (f) to make appropriate elections permitted under any applicable tax law, provided that such elections will not, in the opinion of counsel or the accountants for the Partnership, be disadvantageous to a majority in interest of the Non-Managing General Partners; (g) to change the principal office of the Partnership to other places subject to the notice provision herein provided; 13 (h) to employ agents, attorneys, public accountants (which shall be, in all events, a "Big Five" accounting firm), and depositories and to grant powers of attorney; (i) to employ persons necessary and appropriate in the operation and management of the Partnership and the Property, including, but not limited to, supervisory managing agents, insurance brokers, real estate brokers, and loan brokers, on such terms and for such compensation which does not exceed generally prevailing market rates, all to act under the supervision of the Managing General Partner, and the Managing General Partner on behalf of the Partnership is hereby authorized to enter into an agreement with any Managing General Partner in their individual capacities or a corporation or other entity affiliated with any Managing General Partner for the performance of such services to the Partnership except as otherwise provided for in this Agreement; (j) to enter into any contract of insurance which the Managing General Partner deems necessary and proper for the protection of the Partnership, the conservation of the Property or any other asset of the Partnership, or for a purpose convenient or beneficial to the Partnership, including but not limited to, a contract naming the Managing General Partner as additional insured, and to continue in force any policies required by any mortgage, lease or other agreement relating to the Property or any part thereof; provided that, so long -------- ---- as PIC or any Affiliate of PIC is a Partner, (i) the Partnership shall maintain reasonable and customary insurance with respect to the Property with amounts and types of coverage that are at least comparable to that maintained by Affiliates of the BP Partners with respect to other properties owned by such Affiliates (after giving effect to differences in the value and nature of such properties) and (ii) the Partnership shall maintain business interruption and commercial general liability insurance in at least the amounts set forth on Exhibit E --------- hereto; (k) to pay, collect, compromise, arbitrate, resort to legal action or otherwise make or defend claims or demands of or against the Partnership; provided that, so long as PIC, or an Affiliate of PIC, is a Partner, neither the - -------- ---- Managing General Partner nor the Partnership shall compromise or settle any claim or demand of, or against, the Partnership without PIC's, or its Affiliate's, consent, which consent will not be unreasonably withheld; (l) to borrow money and issue evidences of indebtedness in furtherance of any and all purposes of the Partnership, including borrowings from Partners of the Partnership, as contemplated by Section 5.7 hereof or otherwise, and including borrowings made in accordance with the financing plan for the Partnership described in Exhibit F hereto; to guarantee the obligations of any --------- other Person (but only when such guaranty is made in furtherance of the business of the Partnership), including the indebtedness of such Person; and to secure any or all of the above by mortgage, pledge, guaranty or other lien on the Property and/or any other asset of the Partnership; and (m) to lend money to any BP Partner or any Affiliate of any BP Partner pursuant to a Special BP Loan. 14 SECTION 5.4 Limitations on Managing General Partner's Authority. --------------------------------------------------- (a) Notwithstanding anything in this Agreement to the contrary, for so long as PIC is a Partner, the Managing General Partner shall not have the power or authority to, and shall not, cause the Partnership to take any of the following actions, without the consent of PIC, which consent shall not be unreasonably withheld: (i) other than in the ordinary course of business, cause any closing of a material portion of the Property for renovations (other than repairs necessitated as a result of a fire or other casualty); (ii) cause or permit the engagement by the Partnership in any business other than as contemplated under Section 1.6; ----------- (iii) take any action or make any decision involving credit, management or servicing decisions relating to the Investment Notes other than making an election to accelerate the Investment Notes upon the occurrence of (and during the continuance of) an Event of Default or taking any action or decision relating to the Redemption Distribution; (iv) make a loan to or guarantee the indebtedness of any Person other than (A) loans to tenants of the Property for tenant improvements or (B) a Special BP Loan; (v) cause or permit the sale of (A) all or any material portion of the Property, except leases, concessionaire agreements and space licenses entered into in the ordinary course of business of the Property, or (B) except in connection with the Redemption Distribution, the Investment Notes or any portion thereof or interest therein; (vi) cause the Partnership to (A) obtain any borrowing, (B) issue evidences of indebtedness, or (C) guaranty the obligations of any Person, if such borrowing, issuance or guaranty provides for recourse to PIC (other than the Prudential Guarantied Loan or the Equity Redemption Loan or any Replacement Debt (as defined in Exhibit F); (vii) amend this Agreement if such amendment affects or could affect (A) the receipt, amount or timing of any distributions to PIC, or (B) PIC's rights or obligations under this Agreement or the Redemption Agreement; (viii) cause the dissolution of the Partnership, or cause the Partnership to file or otherwise commence a voluntary bankruptcy case, or consent to the commencement of an involuntary bankruptcy case, under the United States Code or under any other applicable bankruptcy, insolvency or similar law now or hereafter in effect, or consent to the entry of an order for relief in an involuntary case, or consent to the 15 appointment of or taking possession by a receiver, trustee or other custodian for all or a substantial part of the Property; (ix) borrow money from the Managing General Partner or any Affiliate of the Managing General Partner except as permitted or required under Sections 2.2(c) and 5.7 or otherwise in this Agreement; ----------------------- (x) assign, relinquish, settle, compromise, waive or impair any of the Partnership's rights under or with respect to, or amend, terminate, extend the term of (or time for payments due, or performance to be rendered, to the Partnership under) or otherwise modify any instrument or agreement under which the Partnership has rights and to which the Managing General Partner or any of its Related Parties is a party; or (xi) engage in any activity without a good faith business purpose therefor and with the intent of manipulating the "Operating Profits" or "Operating Losses" of the Partnership described in the Redemption Agreement in a manner intended to materially adversely affect, to the benefit of the other Partners, the amounts that PIC would be entitled to receive under this Agreement or the Redemption Agreement. SECTION 5.5 Filing of Returns and Other Writings. ------------------------------------ The Managing General Partner shall be the Tax Matters Partner and is also specifically authorized to and shall cause the preparation and timely filing of all Partnership tax returns and shall, on behalf of the Partnership, subject to the terms and provisions of the Redemption Agreement, make such tax elections for the Partnership as it, after consultation with the Partnership's accountants, shall determine to be in the best interests of the Partners. In addition, the Managing General Partner shall timely file all other forms, documents or other writings with respect to the business and operation of the Partnership which shall be required by any governmental agency or authority having jurisdiction to require such forms, documents or other writings, and shall transmit to each Partner any form or document required to be transmitted by any such governmental agency. SECTION 5.6 Other Permissible Activities. ---------------------------- Nothing herein contained shall be deemed to prevent any Partner or any shareholder or affiliate thereof from engaging in other activities for profit, whether in the real estate business or otherwise. The Managing General Partner (or any shareholder or affiliate thereof), or any Partner, may, in the future, organize and manage joint ventures, additional limited partnerships or other business entities for the acquisition, management and sale of real estate. Neither this Agreement nor any activity undertaken pursuant hereto shall prevent any Partner or any affiliate from engaging in such activities, or require any Partner to permit the Partnership or any Partner to participate in any such activities and, as a material part of the consideration for each Partner's execution hereof, each Partner, for the benefit of the other Partners, hereby waives, relinquishes and renounces any such right or claim of participation. 16 SECTION 5.7 Contracts with Affiliates; Borrowing from Partners. -------------------------------------------------- The Managing General Partner is authorized to enter into agreements on behalf of the Partnership with other persons or entities affiliated with the Partnership and the Partners, including with respect to the borrowing of money from, and issuance of evidences of indebtedness to, Partners of the Partnership in furtherance of any and all purposes of the Partnership, including borrowing from the Managing General Partner or any of its Affiliates for the purposes and on the terms set forth on Exhibit B attached hereto and incorporated herein by --------- reference; provided, however, that all such agreements (other than the giving of -------- ------- BP Notes and the making of the Special BP Loans) shall be disclosed to the other Partners and shall not be less favorable to the Partnership than had such agreement been negotiated at arms-length and on market terms. Notwithstanding any other provision of this Agreement, it is acknowledged and agreed that an Affiliate of the Managing General Partner shall enter into a management agreement with the Partnership for a management fee that does not exceed the management fee that was payable to Pacific Property Services, L.P. (the previous management company that managed the Property) as of May 1, 1998. SECTION 5.8 Indemnification. --------------- (a) To the fullest extent permitted by California law, the Partnership shall indemnify each Indemnitee from and against any and all losses, claims, damages, liabilities, joint or several, expenses (including, without limitation, attorneys fees and other legal fees and expenses), judgments, fines, settlements, and other amounts arising from any and all claims, demands, actions, suits or proceedings, civil, criminal, administrative or investigative, that relate to the operations of the Partnership as set forth in this Agreement, in which such Indemnitee may be involved, or is threatened to be involved, as a party or otherwise, unless it is established that: (i) the act or omission of the Indemnitee was material to the matter giving rise to the proceeding and either was committed in bad faith, was the result of active and deliberate dishonesty, or was the result of a breach of this Agreement by such Indemnitee (or by the Partner of which such Indemnitee is a director or officer); or (ii) the Indemnitee actually received an improper personal benefit in money, property or services, or in the case of any criminal proceeding, the Indemnitee had reasonable cause to believe that the act or omission was unlawful. Without limitation, the foregoing indemnity shall extend to any liability of any Indemnitee, pursuant to a loan guaranty (except a guaranty by a Partner of nonrecourse indebtedness of the Partnership or as otherwise provided in any such loan guaranty) or otherwise for any indebtedness of the Partnership, and the Managing General Partner is hereby authorized and empowered, on behalf of the Partnership, to enter into one or more indemnity agreements consistent with the provisions of this Section 5.8 in favor of any Indemnitee having or potentially having liability for any such indebtedness. The termination of any proceeding by conviction of an Indemnitee or upon a plea of nolo contendere or its equivalent by an Indemnitee, or an entry of an order of probation against an Indemnitee prior to judgment, creates a rebuttable presumption that such Indemnitee acted in a manner contrary to that specified in this Section 5.8(a). Any indemnification pursuant to this Section 5.8 shall be made only out of the assets of the Partnership and shall not impose any personal liability on any Partner, and neither the Managing General Partner nor any Non-Managing General 17 Partner shall have any obligation to contribute to the capital of the Partnership, or otherwise provide funds, to enable the Partnership to fund its obligations under this Section 5.8. (b) If the Managing General Partner avails itself of the indemnification provisions set forth herein, the Managing General Partner shall promptly notify in writing the other Partners of such fact and shall provide a brief description of the nature and magnitude of the indemnification claimed. An Indemnitee, other than the Managing General Partner, may assert a claim for indemnification hereunder by giving written notice thereof to the Managing General Partner. If indemnification is sought for a claim or liability asserted by a third party, the Indemnitee shall also give written notice thereof to the Managing General Partner promptly after it receives notice of the claim or liability being asserted. Such notice shall summarize the bases for the claim for indemnification and any claim or liability being asserted by a third party. The Managing General Partner, on behalf of the Partnership, shall be entitled to direct the defense against a third party claim or liability with counsel selected by it (subject to the consent of the Indemnitee, which consent shall not be unreasonably withheld) as long as the Partnership is conducting a good faith and diligent defense. The Indemnitee shall, at all times, have the right to fully participate in the defense of a third party claim or liability at its own expense, directly or through counsel; provided, however, that if the named -------- ------- parties to the action or proceeding include both the Partnership and the Indemnitee, and the Indemnitee is advised by counsel that representation of both parties by the same counsel would be inappropriate under applicable standards of professional conduct, the Indemnitee may engage separate counsel, whose reasonable fees and expenses shall be borne by the Partnership. If no notice of intent to dispute and defend a third party claim or liability is given by the Managing General Partner within 20 business days of receiving notice of such claim or liability, the Indemnitee shall have the right, at the expense of the Partnership, to undertake the defense of such claim or liability (with counsel selected by the Indemnitee), and to compromise or settle it, exercising reasonable business judgment. If the third party claim or liability is one that, by its nature, cannot be defended solely by the Partnership, then the Indemnitee shall make available such information and assistance as the Managing General Partner may reasonably request and shall cooperate with the Partnership in such defense, at the expense of the Partnership. (c) Subject to the procedures set forth in Section 5.8(b), reasonable expenses incurred by an Indemnitee who is a party to a proceeding in a matter for which the Indemnitee has undertaken the defense pursuant to the provisions of this Section 5.8 (other than as a result of the rejection or dispute by the Managing General Partner of a claim for indemnification under Section 5.8(b)) shall be paid or reimbursed by the Partnership in advance of the final disposition of the proceeding upon receipt by the Partnership of (i) a written affirmation by the Indemnitee of the Indemnitee's good faith belief that the standard of conduct necessary for indemnification by the Partnership as authorized in Section 5.8(a) has been met, and (ii) a written undertaking by or on behalf of the Indemnitee to repay the amount if it shall ultimately be determined that the standard of conduct has not been met. (d) The indemnification provided by this Section 5.8 shall be in addition to any other rights to which an Indemnitee or any other Person may be entitled under this 18 Agreement or any agreement, pursuant to any vote of the Partners, as a matter of law or otherwise, and shall continue as to an Indemnitee who has ceased to serve in such capacity unless otherwise provided in a written agreement pursuant to which such Indemnitee is indemnified. (e) The Partnership may, but shall not be obligated to, purchase and maintain insurance, on behalf of the Indemnitees and such other Persons as the Managing General Partner shall determine in its reasonable discretion, against any liability that may be asserted against or expenses that may be incurred by such Person in connection with the Partnership's activities, regardless of whether the Partnership would have the power to indemnify such Person against such liability under the provisions of this Agreement. (f) In no event may an Indemnitee subject any of the Partners to personal liability by reason of the indemnification provisions set forth in this Agreement. (g) An Indemnitee shall not be denied indemnification in whole or in part under this Section 5.8 solely because the Indemnitee had an interest in the transaction with respect to which the indemnification applies if the transaction was otherwise permitted by the terms of this Agreement. (h) The provisions of this Section 5.8 are for the benefit of the Indemnitees, their heirs, successors, assigns and administrators and shall not be deemed to create any rights for the benefit of any other Persons. Any amendment, modification or repeal of this Section 5.8 or any provision hereof shall be prospective only and shall not in any way affect the Partnership's liability to any Indemnitee under this Section 5.8, as in effect immediately prior to such amendment, modification, or repeal with respect to claims arising from or relating to matters occurring, in whole or in part, prior to such amendment, modification or repeal, regardless of when such claims may arise or be asserted. SECTION 5.9 Liability of the Managing General Partner. ----------------------------------------- (a) Notwithstanding anything to the contrary set forth in this Agreement, except as otherwise expressly provided in this Agreement, the Managing General Partner and its officers and directors shall not be liable for monetary damages to the Partnership, any Partners or any Assignees for losses sustained or liabilities incurred as a result of reasonable errors in judgment or of any act or omission if the Managing General Partner acted in good faith; provided, however, that the Managing General Partner shall be liable to the Partnership and Partners for its material breaches of this Agreement. (b) Subject to its obligations and duties as Managing General Partner set forth in Section 5.3 hereof, and subject to the limitations set forth in Section 5.4 hereof, the Managing General Partner may exercise any of the powers granted to it by this Agreement and perform any of the duties imposed upon it hereunder either directly or by or through its agents. The Managing General Partner shall not be responsible for any misconduct or negligence on the part 19 of any such agent appointed by the Managing General Partner in good faith, except as otherwise expressly provided herein. (c) Any amendment, modification or repeal of this Section 5.9 or any provision hereof shall be prospective only and shall not in any way affect the limitations on the Managing General Partner's liability (and that of its officers and directors) to the Partnership and the Non-Managing General Partners under this Section 5.9 as in effect immediately prior to such amendment, modification or repeal with respect to claims arising from or relating to matters occurring, in whole or in part, prior to such amendment, modification or repeal, regardless of when such claims may arise or be asserted. SECTION 5.10 Other Matters Concerning the Managing General Partner. ----------------------------------------------------- (a) The Managing General Partner may rely and shall be protected in acting, or refraining from acting, upon any resolution, certificate, statement, instrument, opinion, report, notice, request, consent, order, bond, debenture, or other paper or document believed by it in good faith to be genuine and to have been signed or presented by the proper party or parties. (b) The Managing General Partner may consult with legal counsel, accountants, appraisers, management consultants, investment bankers, architects, engineers, environmental consultants and other consultants and advisers selected by it, and any act taken or omitted to be taken in reliance upon the opinion of such Persons as to matters which such Managing General Partner reasonably believes to be within such Person's professional or expert competence shall be conclusively presumed to have been done or omitted in good faith and in accordance with such opinion. (c) The Managing General Partner shall have the right, in respect of any of its powers or obligations hereunder, to act through any of its duly authorized officers and duly appointed attorneys-in-fact. Each such attorney shall, to the extent provided by the Managing General Partner in the power of attorney, have full power and authority to do and perform all and every act and duty which is permitted or required to be done by the Managing General Partner hereunder. ARTICLE 6 - ACCOUNTING SECTION 6.1 Fiscal Year and Tax Accounting Method. ------------------------------------- The Partnership shall operate on the basis of a calendar year, and shall report its operations for tax and all other purposes in accordance with those methods the Managing General Partner and the Partnership's accountant deem advisable. 20 SECTION 6.2 Books, Records, and Tax Reports. ------------------------------- The Partnership shall maintain full and accurate books at its principal office which all Partners shall have the right to inspect and examine during business hours upon reasonable written notice to the Managing General Partner. The Managing General Partner shall keep or cause such books to be kept and shall fully and accurately enter all transactions of the Partnership therein. Such books shall be closed and balanced at the end of each calendar year. On or before March 31 of each year, the Managing General Partner will furnish the Non- Managing General Partners with a balance sheet and a statement of income and expenses of the Partners for the prior calendar year and a report on Treasury Form K-1 containing information relating to the Partnership to be used in preparing a Non-Managing General Partner's personal federal income tax return. SECTION 6.3 Accounting Practice. ------------------- The books of account of the Partnership shall be kept in accordance with good and accepted bookkeeping and accounting practices for similar properties, provided that all methods of accounting and of treating particular transactions shall be in accordance with the methods of accounting employed for Federal income tax purposes. The determinations of the Managing General Partner with respect to the treatment of any items or its allocation for federal, state or local tax purposes shall be binding upon all the Partners so long as such determination shall not be inconsistent with any express term hereof or of the Redemption Agreement. SECTION 6.4 Accountants. ----------- The Partnership's certified public accountant shall be designated by the Managing General Partner, subject to the terms and provisions of Section 5.3(h). SECTION 6.5 Bank Accounts. ------------- The Managing General Partner shall, on behalf of the Partnership, open and maintain a bank account or accounts in a bank or other financial institution of its choosing in which shall be deposited all of the capital, cash receipts and other funds of the Partnership. ARTICLE 7 - RIGHTS AND OBLIGATIONS OF THE NON-MANAGING GENERAL PARTNERS SECTION 7.1 Contributions by Non-Managing General Partners. ---------------------------------------------- Except as provided herein, the Non-Managing General Partners shall not be obligated to make a contribution of any sort whatsoever to the capital of the Partnership, or to provide a loan. SECTION 7.2 Corporate Authority. ------------------- 21 Each Partner hereby represents and covenants that its execution of this Agreement has been duly authorized by proper corporate action or otherwise. SECTION 7.3 Role of Non-Managing General Partners. ------------------------------------- Except as otherwise provided in this Agreement, no Non-Managing General Partner shall take part in, or interfere in any manner with, the conduct or control of the business of the Partnership, or shall have any right or authority to act for or bind the Partnership. SECTION 7.4 Rights and Obligations Under the Act. ------------------------------------ In addition to the foregoing rights (including any limitations thereof) and obligations, the Non-Managing General Partners shall each have those rights and obligations conferred or imposed upon partners of a general partnership under applicable law, to the extent not inconsistent with the terms hereof. SECTION 7.5 Redemption Rights. ----------------- Except as specifically provided in the Redemption Agreement, no Partner shall have the right to withdraw from the Partnership or have its interest in the Partnership redeemed by the Partnership. ARTICLE 8 - WITHDRAWAL AND REPLACEMENT OF PARTNERS AND TRANSFER OF PARTNERSHIP INTEREST SECTION 8.1 Non-Managing General Partners. ----------------------------- No Non-Managing General Partner's interest shall be sold, assigned, transferred, pledged or hypothecated or encumbered (any such transaction, a "Transfer"), in whole or in part, except in accordance with the terms and -------- conditions set forth in this Article 8. Any Transfer or purported Transfer of a Non-Managing General Partner's interest not made in accordance with this Article 8 shall be null and void. SECTION 8.2 Managing General Partner. ------------------------ The Managing General Partner may not Transfer its interest in the Partnership or withdraw from the Partnership without the consent of the Non- Managing General Partners. SECTION 8.3 Transfer of Partnership Interests. --------------------------------- (a) Subject to the provisions of this Article 8, a Non-Managing General Partner may transfer its interest in the Partnership with the consent of the Managing General Partner, which consent may be withheld by the Managing General Partner in its sole and absolute 22 discretion. Nothing in this Agreement shall be deemed to preclude the purchase by the Managing General Partner of any Non-Managing General Partnership interest and the admission of a Managing General Partner as a Non-Managing General Partner in connection therewith. (b) If the interest, or any part thereof, of a Partner in the Partnership is disposed of pursuant to this Section, such Partner shall nevertheless be entitled to a portion of the income, gain, loss, deduction and credit allocated to such interest or part thereof in accordance with the provisions of this agreement for the fiscal year of the Partnership in which such disposition occurs, based upon the number of months during such year that such Partner owned such interest or part thereof. Any predecessor or successor of such Partner in respect of such interest or part thereof shall share in such profits and losses for the fiscal year in which such disposition occurs and the Partnership shall be bound by such allocation, provided the same shall be deemed reasonable by the Partnership's accountants, upon being furnished with timely written notice of same. Distributions of cash or other property shall be made only to such persons who are Partners on the date of distribution. (c) Without limiting the foregoing, the Managing General Partner may prohibit any transfer by a Non-Managing General Partner of its interest in the Partnership if, in the opinion of legal counsel to the Partnership, such transfer would require filing of a registration statement under the Securities Act of 1933 or would otherwise violate any federal or state securities laws or regulations applicable to the Partnership or interests in the Partnership, or would cause a termination of the Partnership under Section 708 of the Code. (d) Without limiting the foregoing, no transfer by a Non-Managing General Partner of its interests in the Partnership may be made to any Person if (i) in the opinion of legal counsel for the Partnership, it would result in the Partnership being treated as an association taxable as a corporation; (ii) such transfer is effectuated through an "established securities market" or a "secondary market (or the substantial equivalent thereof)" within the meaning of Section 7704 of the Code; (iii) such transfer would cause the Partnership to become, with respect to any employee benefit plan subject to Title I of ERISA, a "party-in-interest" (as defined in Section 3(14) of ERISA) or a "disqualified person" (as defined in Section 4975(c) of the Code); (iv) such transfer would, in the opinion of legal counsel for the Partnership, cause any portion of the assets of the Partnership to constitute assets of any employee benefit plan pursuant to Department of Labor Regulations Section 2510.2-101; or (v) such transfer would subject the Partnership to be regulated under the Investment Company Act of 1940, the Investment Advisors Act of 1940 or the Employee Retirement Income Security Act of 1974, each as amended, or would violate any loan documents to which the Partnership is a party. (e) The transfer of a Partnership interest shall not constitute, or result in, a dissolution of the Partnership. SECTION 8.4 Substituted Non-Managing General Partners. ----------------------------------------- 23 (a) No Non-Managing General Partner shall have the right to substitute a transferee as a Non-Managing General Partner in his place. The Managing General Partner shall, however, have the right to consent to the admission of a transferee of the interest of a Non-Managing General Partner pursuant to this Section 8.4 as a Substituted Non-Managing General Partner, which consent may be given or withheld by the Managing General Partner in its sole and absolute discretion. The Managing General Partner's failure or refusal to permit a transferee of any such interests to become a Substituted Non-Managing General Partner shall not give rise to any cause of action against the Partnership or any Partner. (b) A transferee who has been admitted as a Substituted Non-Managing General Partner in accordance with this Article 8 shall have all the rights and powers and be subject to all the restrictions and liabilities of a Non-Managing General Partner under this Agreement. (c) Upon the admission of a Substituted Non-Managing General Partner, the Managing General Partner shall amend Schedule A to reflect the name, ---------- address, and Percentage Interest of such Substituted Non-Managing General Partner and to eliminate or adjust, if necessary, the name, address and interest of the predecessor of such Substituted Non-Managing General Partner. SECTION 8.5 Assignees. --------- If the Managing General Partner, in its sole and absolute discretion, does not consent to the admission of any permitted transferee as a Substituted Non- Managing General Partner, as described in Section 8.4, such transferee shall be considered an Assignee for purposes of this Agreement. An Assignee shall be deemed to have had assigned to it, and shall be entitled to receive distributions from the Partnership and the share of net income, net losses, and any other items, gain, loss deduction and credit of the Partnership attributable to the interest in the Partnership assigned to such transferee, but except as otherwise provided herein shall not be deemed to be a holder of an interest in the Partnership for any other purpose under this Agreement, and shall not be entitled to vote in any matter presented to the Non-Managing General Partners for a vote (such interest in the Partnership being deemed to have been voted on such matter in the same proportion as all other interests held by Non-Managing General Partners are voted). In the event any such transferee desires to make a further assignment of any such interest in the Partnership, such transferee shall be subject to all of the provisions of this Article 8 to the same extent and in the same manner as any Non-Managing General Partner desiring to make such an assignment. 24 ARTICLE 9 - DISSOLUTION, LIQUIDATION AND TERMINATION SECTION 9.1 Dissolution. ----------- (a) Except as herein otherwise expressly provided, the Partnership shall be dissolved upon the occurrence of any of the following events: (1) agreement by all of the Partners to dissolve the Partnership; (2) expiration of the term provided in Section 1.5 hereof; (3) sale or taking by eminent domain or other lawful government action resulting in transfer of title of substantially all of the Partnership's assets; or (4) any other event which, under applicable law, results in the dissolution of the Partnership. (b) Dissolution shall be effective on the date of the event giving rise to the dissolution, but the Partnership shall not terminate until the assets thereof have been distributed in accordance with the provisions of Section 9.2 hereof. SECTION 9.2 Liquidation. ----------- (a) If the Partnership shall be dissolved by reason of the occurrence of any of the circumstances described in Section 9.1, no further business shall be conducted by the Partnership except for taking of such action as shall be necessary for the winding up of its affairs and distribution of its assets to the Partners pursuant to the provisions of this Article 9. Upon such dissolution, the Managing General Partner shall act as liquidator or, if it is unable or unwilling to so act, it shall appoint one or more liquidators, who shall have full authority to wind up the affairs of the Partnership and to make final distribution as provided herein. Upon such dissolution of the Partnership, the liquidator(s) shall determine which, if any, Partnership properties and assets should be distributed in kind, and dispose of all other Partnership properties and assets at the best cash price obtainable therefor and distribute the proceeds as follows: (1) First, to the payment and discharge of all of the Partnership's debts and liabilities to creditors other than the Partners; (2) Second, to the payment and discharge of all of the Partnership's debts and liabilities to Partners in their capacities as creditors of the Partnership; (3) The balance, if any, to the Partners in accordance with the provisions of Article 4. 25 (b) Notwithstanding the foregoing, if any Partner shall be indebted to the Partnership, then, until payment of such indebtedness by said Partner, the liquidator(s) shall retain such Partner's distributive share of the Partnership properties and assets and, after applying the cost of operation of such properties and assets during the period of such liquidation against the income therefrom, the balance of such income shall be applied in liquidation of such indebtedness. However, if at the expiration of six (6) months after notice of such outstanding indebtedness has been given to such Partner and such amount has not been paid or otherwise liquidated in full, the liquidator(s) may sell the assets allocable to such Partner at public or private sale at the best price immediately obtainable, such best price to be determined in the sole judgement of the liquidator(s). So much of the proceeds of such sale as shall be necessary to liquidate such indebtedness shall then be so applied, and the balance of such proceeds, if any, shall be distributed to such Partner. Any gain or loss realized for Federal income tax purposes upon the disposition of such assets shall, to the extent permitted by law, be allocated to such Partner, and to the extent not so permitted, to the Partners. Thereafter, the liquidator(s) shall comply with all requirements of the Act, or other applicable law, pertaining to the winding up of a limited partnership, at which time the Partnership shall stand terminated. (c) In the event the Managing General Partner's interest in the Partnership is "liquidated" within the meaning of Regulations Section 1.704- 1(b)(2)(ii)(g) (including, without limitation, upon the liquidation of the Partnership) and the Managing General Partner's Capital Account has a deficit balance after giving effect to all contributions, distributions and allocations for all taxable years, including the year during which such liquidation occurs, the Managing General Partner shall contribute to the capital of the Partnership the amount necessary to restore such deficit balance to zero in compliance with Regulations Section 1.704-1(b)(2)(ii)(b)(3). ARTICLE 10 - MISCELLANEOUS SECTION 10.1 Redemption Agreement. -------------------- This Agreement and the Partners hereto are subject to the terms and provisions of the Redemption Agreement. If, and to the extent that, any terms or provisions of this Agreement are inconsistent with any terms and provisions of the Redemption Agreement, the terms and provisions of the Redemption Agreement shall govern and control. SECTION 10.2 Notice. ------ All notices, demands, consents, options, elections, or other communications hereunder shall be in writing and shall be deemed to have been exercised, made or given upon delivery if delivered by hand or by courier service and three (3) business days after being deposited in the United States mail and sent by certified or registered mail, return receipt requested, postage prepaid. Any notice required to be sent to any Partner shall be sent to the addresses specified on 26 Schedule A attached hereto and incorporated herein. Any party may designate an - ---------- alternative address on five (5) days' notice to the Partnership. SECTION 10.3 Further Assurances. ------------------ Each of the Partners will hereafter execute and deliver such further instruments, and do such further acts as may be required to carry out the intent and purposes of this Agreement. SECTION 10.4 Agreement in Counterparts. ------------------------- This Agreement may be executed in one or more counterparts and all such counterparts shall constitute one agreement binding on all the parties, notwithstanding that all the parties are not signatories to the original or the several counterparts. SECTION 10.5 Construction. ------------ None of the provisions of this Agreement shall be for the benefit or enforceable by the creditors of the Partnership. SECTION 10.6 Governing Law. ------------- This Agreement shall, except as herein otherwise expressly provided, be governed and construed in accordance with the laws of the State of California. SECTION 10.7 Amendments. ---------- This Agreement may be amended only by a written amendment signed by all of the Partners. SECTION 10.8 Pronouns. -------- Any pronouns and any variations thereof used herein shall be deemed to refer to the masculine, feminine, neuter, singular or plural, as the identity of the undersigned may require. SECTION 10.9 Successors in Interest. ---------------------- Except as otherwise provided herein, all provisions of this Agreement shall be binding upon, inure to the benefit of, and be enforceable by and against the respective heirs, executors, administrators, personal representatives, successors and permitted assigns of any of the parties to this Agreement. However, nothing in this Agreement, whether expressed or implied, is intended to confer upon any entity, other than specifically provided, any rights or benefits under or by reason of this Agreement. SECTION 10.10 Headings. -------- 27 The headings contained at the beginning of each Article and Section are for purposes of convenience only and are not intended to limit, expand or define the content thereof. SECTION 10.11 Consent to Jurisdiction and Service of Process. ---------------------------------------------- ALL JUDICIAL PROCEEDINGS BROUGHT AGAINST ANY PARTY HERETO ARISING OUT OF OR RELATING TO THIS AGREEMENT MAY BE BROUGHT IN ANY STATE OR FEDERAL COURT OF COMPETENT JURISDICTION IN THE STATE OF CALIFORNIA, AND BY EXECUTION AND DELIVERY OF THIS AGREEMENT EACH PARTY HERETO ACCEPTS FOR ITSELF, GENERALLY AND UNCONDITIONALLY, THE NONEXCLUSIVE JURISDICTION OF THE AFORESAID COURTS AND WAIVES ANY DEFENSE OF FORUM NON CONVENIENS AND IRREVOCABLY AGREES TO BE BOUND BY ANY JUDGMENT RENDERED THEREBY IN CONNECTION WITH THIS AGREEMENT. Each party hereby agrees that service of all process in any such proceeding in any such court may be made by registered or certified mail, return receipt requested, to any party hereto, at its address provided in this Agreement, such service being hereby acknowledged by each party to be sufficient for personal jurisdiction in any action against such party in any such court and to be otherwise effective and binding service in every respect. Nothing herein shall affect the right to serve process in any other manner permitted by law. SECTION 10.12 Waiver of Jury Trial. -------------------- EACH OF THE PARTIES TO THIS AGREEMENT HEREBY AGREES TO WAIVE ITS RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF ACTION BASED UPON OR ARISING OUT OF THIS AGREEMENT OR THE SUBJECT MATTER OF THIS AGREEMENT. The scope of this waiver is intended to be all-encompassing of any and all disputes that may be filed in any court and that relate to the subject matter of this Agreement, including, without limitation, contract claims, tort claims, beach of duty claims and all other common law and statutory claims. Each party hereto acknowledges that this waiver is a material inducement to enter into a business relationship, that each has already relied on this waiver in entering into this Agreement, and that each shall continue to rely on this waiver in their related future dealings. Each party hereto further warrants and represents that it has reviewed this waiver with its legal counsel and that it knowingly and voluntarily waives its jury trial rights following consultation with such legal counsel. THIS WAIVER IS IRREVOCABLE, MEANING THAT IT MAY NOT BE MODIFIED EITHER ORALLY OR IN WRITING, AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS OR MODIFICATIONS TO THIS AGREEMENT. In the event of litigation, this Agreement may be filed as a written consent to a trial by the court. 28 IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the day and year first above written. WITNESS: MANAGING GENERAL PARTNER: ------------------------ BOSTON PROPERTIES LLC By: Boston Properties Limited Partnership, Managing Member By: Boston Properties, Inc., General Partner /s/ Bradley A. Jacobson By: /s/ Thomas J. O'Connor ---------------------------- ------------------------------ Name: Thomas J. O'Connor Title: Vice President WITNESS: NON-MANAGING GENERAL PARTNERS: ----------------------------- BP EC1 HOLDINGS LLC By: Boston Properties Limited Partnership, Managing Member By: Boston Properties, Inc., General Partner /s/ Bradley A. Jacobson By: /s/ Thomas J. O'Connor ---------------------------- ------------------------------ Name: Thomas J. O'Connor Title: Vice President WITNESS: PIC REALTY CORPORATION /s/ Bradley A. Jacobson By: /s/ Gary L. Frazier ---------------------------- -------------------------------------- Name: Gary L. Frazier Title: Vice President 29 SCHEDULE A ---------- ATTACHED TO AMENDED AND RESTATED PARTNERSHIP AGREEMENT OF ONE EMBARCADERO CENTER VENTURE Managing General Partner ------------------------ Name and Address Percentage Interest - ---------------- ------------------- Boston Properties LLC 0.499830% c/o Boston Properties, Inc. 8 Arlington Street Boston, Massachusetts 02116 Non-Managing Partners --------------------- Name and Address Percentage Interest - ---------------- ------------------- BP EC1 Holdings LLC 49.483214% c/o Boston Properties, Inc. 8 Arlington Street Boston, Massachusetts 02116 PIC Realty Corporation 50.016956% c/o Prudential Realty Group 8 Campus Drive 4th Floor - Arbor Circle South Parsippany, New Jersey 07054 Attention: John R. Triece Facsimile: (201) 683-1797 with copies to: Prudential Insurance Company of America O'Melveny & Myers 4 Embarcadero Center, Suite 2700 Embarcadero Center West San Francisco, CA 94111 275 Battery Street Attention: Harry Mixon San Francisco, CA 94111 Facsimile: (415) 956-2197 Attention: Stephen A. Cowan Facsimile: (415) 984-8701 EXHIBIT A --------- Legal Description of One Embarcadero Center ------------------------------------------- [INTENTIONALLY OMITTED] EXHIBIT B --------- Approved Terms and Conditions of Loans from Managing General Partner The Partnership shall be permitted to borrow funds from the Managing General Partner from time to time, as determined in the sole discretion of the Managing General Partner, for the purpose of funding working capital, leasing commissions, tenant improvements, capital expenditures and other expenditures relating to the Property. Each such borrowing shall be in the form of an unsecured loan and shall be evidenced by a note issued by the Partnership to the Managing General Partner in the form of Exhibit A attached to this Exhibit B. --------- --------- Exhibit A [FORM OF BP NOTE] - --------- DELAYED DEMAND NOTE ------------------- $_____________________ San Francisco, California _____________, 19__ At any time after _________, 199_ [the date which is 120 days after the date of the Closing under the Master Transaction Agreement], FOR VALUE RECEIVED, ONE EMBARCADERO CENTER VENTURE, a California general partnership with a principal place of business in San Francisco, California (the "Maker"), promises ----- to pay [BOSTON PROPERTIES LIMITED PARTNERSHIP, a Delaware limited partnership] [other BPLLC affiliate] with a principal place of business in Boston, Massachusetts, ON DEMAND, the principal sum of _____________________ ($__________), with interest thereon at the rate of ten percent (10%) per annum. Interest shall be computed on the number of days principal is outstanding based on a 365 day year. All interest accruing under this Note shall be due and payable (i) monthly in arrears on the fifth (5th) day of each succeeding calendar month, commencing ________, 199_ [fifth day of calendar month following month in which note is made] and continuing thereafter until all amounts due hereunder have been paid in full, or (ii) at the option of the holder, on demand at any time after __________, 199_ [the date which is 120 days after the date of the Closing under the Master Transaction Agreement]. The outstanding balance of principal due hereunder may be prepaid in full at any time, or from time to time in part in multiples of One Thousand Dollars ($1,000.00) without any prepayment premium. The Maker agrees to pay all charges of the holder hereof in connection with the collection and enforcement of this Note, including reasonable attorneys' fees and disbursements. The Maker hereby waives presentment, demand, notice, protest and all other suretyship defenses generally and agrees that any renewal, extension or postponement of the time of payment or any other indulgence, may be effected without notice to and without releasing the Maker from any liability hereunder. This Note shall have the effect of an instrument under seal. ONE EMBARCADERO CENTER VENTURE By: Boston Properties LLC, its managing general partner By: Boston Properties Limited Partnership, its managing member By: Boston Properties, Inc., its general partner By:__________________________ Name: Title: EXHIBIT C --------- DESCRIPTION OF EQUITY REDEMPTION LOAN ------------------------------------- The "Equity Redemption Loan" shall mean that certain loan to the Partnership in the aggregate principal amount of $74,200,000, which loan is made pursuant to a certain Term Loan Agreement dated as of November 12, 1998 by and among BankBoston, N.A., The Chase Manhattan Bank, Fleet National Bank, PNC Bank, National Association, Dresdner Bank AG New York Branch and Grand Cayman Branch, The Bank of New York, Key Bank National Association, Citizens Bank and other banks which may become parties thereto as the lenders thereunder, and One Embarcadero Center Venture, Embarcadero Center Associates, Three Embarcadero Center Venture and Four Embarcadero Center Venture, collectively as the borrowers thereunder, which Term Loan Agreement provides for loans to the borrowers in the aggregate principal amount of $328,143,000. The $74,200,000 loan to the Partnership under such Term Loan Agreement is evidenced by a promissory note of the Partnership in the form provided in such Term Loan Agreement. EXHIBIT D --------- DESCRIPTION OF PRUDENTIAL GUARANTIED LOAN ----------------------------------------- The "Prudential Guarantied Loan" shall mean that certain loan to the Partnership in the aggregate principal amount of $14,000,000, which loan is made pursuant to a certain Term Loan Agreement dated as of November 12, 1998 by and among The Chase Manhattan Bank as lender thereunder, and One Embarcadero Center Venture, Embarcadero Center Associates, Three Embarcadero Center Venture and Four Embarcadero Center Venture, collectively as the borrowers thereunder, which Term Loan Agreement provides for loans to the borrowers in the aggregate principal amount of $92,000,000. The $14,000,000 loan to the Partnership under such Term Loan Agreement is evidenced by a promissory note of the Partnership in the form provided in such Term Loan Agreement. EXHIBIT E --------- Description of Business Interruption and General Liability Insurance Business Interruption Insurance $145,000,000 Commercial General Liability $ 2,000,000 Umbrella Liability Program $200,000,000 EXHIBIT F --------- Description of Financing Plan for One Embarcadero Center Venture 1. Equity Redemption Loan. Upon the execution of this Agreement, the ---------------------- Partnership will enter into a 90 day Term Loan Agreement with BankBoston, N.A., on behalf of itself and as agent for the several banks that are parties thereto, to borrow approximately $74,200,000 with a term of 90 days, which borrowing shall be guaranteed by Boston Properties Limited Partnership ("BPLP"). This ---- loan constitutes the Equity Redemption Loan. Interest on the outstanding indebtedness under the Equity Redemption Loan shall accrue at a rate equal to the 30 day Eurodollar rate plus 50 basis points. In addition, upon the closing of the Equity Redemption Loan, the Partnership will pay its proportionate share of the closing fee in the approximate aggregate amount of $116,000. The Partnership shall pledge the Investment Notes to secure obligations of the Partnership under the Equity Redemption Loan. 2. Prudential Guarantied Loan. Upon the execution of this Agreement, the -------------------------- Partnership will also enter into a Term Loan Agreement with The Chase Manhattan Bank, N.A. to borrow approximately $14,000,000 with a term of 90 days, which borrowing shall be guaranteed by The Prudential Insurance Company of America. This loan constitutes the Prudential Guarantied Loan. Interest on the outstanding indebtedness under the Prudential Guarantied Loan shall accrue at a rate equal to the 30 day Eurodollar rate plus 30 basis points. In addition, upon the closing of the Prudential Guarantied Loan, the Partnership will pay its proportionate share of the closing fee in the approximate aggregate amount of $40,000. 3. Advance Under BPLP Line of Credit. Upon the execution of this --------------------------------- Agreement, BPLP will amend its existing Amended and Restated Revolving Credit Agreement (the "Credit Agreement") with BankBoston, N.A., and certain other ---------------- banks for which BankBoston, N.A. serves as agent, to add, inter alia, the Partnership as a Borrower under the Credit Agreement for the purpose of the advance described in the next paragraph. The Equity Redemption Loan will, upon the earlier of the redemption of PIC Realty Corporation from the Partnership or the 90th day after the date of execution of this Agreement, be repaid through (i) a draw on the Credit Agreement by the Partnership of approximately $6,600,000 and (ii) cash of the Partnership in an amount equal to approximately $67,600,500, which cash will represent proceeds from the repayment of the Special BP Loan. As a result of the draw under the Credit Agreement, the Partnership will be a primary obligor with respect to approximately $6,600,000 of indebtedness under the Credit Agreement. 4. Assumption and Release with respect to Prudential Guarantied Loan. ----------------------------------------------------------------- The Prudential Guarantied Loan will, upon the redemption of the interest of PIC Realty Corporation in the Partnership, be assumed by PIC Realty Corporation and the Partnership will be released as a borrower with respect to the Prudential Guarantied Loan and all other obligations with respect thereto, as contemplated by, and subject to the terms and conditions of, the Redemption Agreement. In the event that the interest of PIC Realty Corporation in the Partnership is not redeemed by February 10, 1999, or in the event that the Partnership is not, by such date, released in full from all obligations with respect to the Prudential Guarantied Loan and related obligations, then either (i) Prudential shall continue to guaranty the Prudential Guarantied Loan until such redemption, assumption and release occurs or (ii) if the Partnership repays and refinances the Prudential Guarantied Loan by obtaining any replacement debt ("Replacement Debt"), Prudential shall guarantee the lenders thereof of the punctual payment in full and all other obligations of such Replacement Debt. 5. Secured Financing. Upon the execution of this Agreement, the ----------------- Partnership, as a co-borrower, will enter into a certain first deed of trust loan in the aggregate principal amount of $320 million with New York Life Insurance Company, The Equitable Life Assurance Society of the United States and Teachers Assurance and Annuity Association of America. As among the co- borrowers, the Partnership will be the primary obligor on $160 million.

 
                                                                    EXHIBIT 99.8


                          THIRD AMENDED AND RESTATED
                             PARTNERSHIP AGREEMENT

                                      OF

                         EMBARCADERO CENTER ASSOCIATES

 
                               TABLE OF CONTENTS


Page ---- ARTICLE 1 - THE PARTNERSHIP........................................................................... 3 SECTION 1.1 Continuation of the Partnership................................................ 3 SECTION 1.2 Partnership Name............................................................... 3 SECTION 1.3 Place of Business.............................................................. 3 SECTION 1.4 General Partnership............................................................ 3 SECTION 1.5 Term of Partnership............................................................ 3 SECTION 1.6 Purposes of the Partnership.................................................... 3 SECTION 1.7 Definitions.................................................................... 4 ARTICLE 2 - CAPITALIZATION............................................................................ 8 SECTION 2.1 Partners' Percentage Interests................................................. 8 SECTION 2.2 Additional Capital Contributions; Limitations on Future Capital Contributions; Obligation of Managing Partner to Purchase BP Notes............. 8 SECTION 2.3 Admission of Additional Partners............................................... 8 SECTION 2.4 Return of Capital Accounts and Redemption of Partnership Interests. 9 SECTION 2.5 Investment Loan, Equity Redemption Loan, Prudential Guarantied Loan, Existing Loans and Replacement Loans........................................... 9 ARTICLE 3 - ALLOCATIONS OF PROFITS AND LOSSES......................................................... 10 SECTION 3.1 Capital Accounts and Allocations of Profit and Loss............................ 10 ARTICLE 4 - DISTRIBUTIONS............................................................................. 12 SECTION 4.1 Distributions.................................................................. 12 SECTION 4.2 Amounts Withheld............................................................... 12 ARTICLE 5 - MANAGEMENT OF THE PARTNERSHIP............................................................. 12 SECTION 5.1 Management..................................................................... 12 SECTION 5.2 Rights to Delegate and Employ.................................................. 13 SECTION 5.3 Enumeration of Specific Rights and Powers...................................... 13 SECTION 5.4 Limitations on Managing General Partner's Authority............................ 15 SECTION 5.5 Filing of Returns and Other Writings........................................... 16 SECTION 5.6 Other Permissible Activities................................................... 16 SECTION 5.7 Contracts with Affiliates; Borrowing from Partners............................. 17 SECTION 5.8 Indemnification................................................................ 17 SECTION 5.9 Liability of the Managing General Partner...................................... 19 SECTION 5.10 Other Matters Concerning the Managing General Partner.......................... 20 ARTICLE 6 - ACCOUNTING................................................................................ 20 SECTION 6.1 Fiscal Year and Tax Accounting Method.......................................... 20
(i)
Page ---- SECTION 6.2 Books, Records, and Tax Reports..................................... 21 SECTION 6.3 Accounting Practice................................................. 21 SECTION 6.4 Accountants......................................................... 21 SECTION 6.5 Bank Accounts....................................................... 21 ARTICLE 7 - RIGHTS AND OBLIGATIONS OF THE NON-MANAGING.................................... 21 SECTION 7.1 Contributions by Non-Managing General Partners...................... 21 SECTION 7.2 Corporate Authority................................................. 21 SECTION 7.3 Role of Non-Managing General Partners............................... 22 SECTION 7.4 Rights and Obligations Under the Act................................ 22 SECTION 7.5 Redemption Rights................................................... 22 ARTICLE 8 - WITHDRAWAL AND REPLACEMENT OF PARTNERS AND..................................... 22 SECTION 8.1 Non-Managing General Partners....................................... 22 SECTION 8.2 Managing General Partner............................................ 22 SECTION 8.3 Transfer of Partnership Interests................................... 22 SECTION 8.4 Substituted Non-Managing General Partners........................... 23 SECTION 8.5 Assignees........................................................... 24 ARTICLE 9 - DISSOLUTION, LIQUIDATION AND TERMINATION....................................... 25 SECTION 9.1 Dissolution......................................................... 25 SECTION 9.2 Liquidation......................................................... 25 ARTICLE 10 - MISCELLANEOUS................................................................. 26 SECTION 10.1 Redemption Agreement................................................ 26 SECTION 10.2 Notice.............................................................. 26 SECTION 10.3 Further Assurances.................................................. 27 SECTION 10.4 Agreement in Counterparts........................................... 27 SECTION 10.5 Construction........................................................ 27 SECTION 10.6 Governing Law....................................................... 27 SECTION 10.7 Amendments.......................................................... 27 SECTION 10.8 Pronouns............................................................ 27 SECTION 10.9 Successors in Interest.............................................. 27 SECTION 10.10 Headings............................................................ 27 SECTION 10.11 Consent to Jurisdiction and Service of Process...................... 28 SECTION 10.12 Waiver of Jury Trial................................................ 28
(ii) Schedules and Exhibits Schedule A Partners and Percentage Interests Exhibit A Legal Description of Property Exhibit B Approved Terms and Conditions of Loans from Managing General Partner Exhibit C Description of Equity Redemption Loan Exhibit D Description of Prudential Guarantied Loan Exhibit E Description of Business Interruption and General Liability Insurance Exhibit F Description of Financing Plan for the Partnership Exhibit G Form of Special BP Loan Note
(iii) THIRD AMENDED AND RESTATED PARTNERSHIP AGREEMENT OF EMBARCADERO CENTER ASSOCIATES This THIRD AMENDED AND RESTATED PARTNERSHIP AGREEMENT OF ONE EMBARCADERO CENTER VENTURE (this "Agreement") is entered into and shall be effective as of --------- the 12th day of November, 1998, by and between Boston Properties LLC, a Delaware limited liability company, having a mailing address c/o Boston Properties, Inc., 8 Arlington Street, Boston, Massachusetts 02116, as managing general partner ("BPLLC" or the "Managing General Partner"), BP EC2 Holdings LLC, a Delaware - ------- ------------------------ limited liability company, having a mailing address c/o Boston Properties, Inc., 8 Arlington Street, Boston, Massachusetts 02116, as non-managing general partner ("Holdings LLC"), and PIC Realty Corporation, a Delaware corporation, having a ------------ mailing address c/o Prudential Realty Group, 8 Campus Drive, 4th Floor - Arbor Circle South, Parsippany, New Jersey 07054 ("PIC"), as non-managing general --- partner. Holdings LLC and PIC are sometimes hereinafter referred to as the "Non-Managing General Partners" and each as a "Non-Managing General Partner." - ------------------------------ ---------------------------- The Managing General Partner and the Non-Managing General Partners are sometimes hereinafter referred to as the "Partners." -------- RECITALS: A. EMBARCADERO CENTER ASSOCIATES (the "Partnership") is a California ----------- general partnership formed pursuant to and governed by that certain Agreement of Partnership dated as of March 16, 1971, creating a general partnership named Embarcadero Center, and as subsequently amended on January 10, 1972, March 1, 1973, April 30, 1973, February 28, 1974, June 6, 1974, March 26, 1975, February 27, 1976, June 1, 1976, August 4, 1976 and June 10, 1977, amended and restated on January 1, 1979, and further amended on December 31, 1986, April 15, 1988, January 1, 1992 and September 28, 1998 (as revised to such date, the "Prior ----- Partnership Agreement"). - --------------------- B. The Partnership owns and has in operation that certain parcel of real property situated in the City and County of San Francisco, California, and more particularly described on Exhibit A hereto, upon which is erected an office --------- building, related improvements and personal property owned by the Partnership and situated thereon or therein, known generally as Two Embarcadero Center (the "Real Property"). ------------- C. On October 31, 1998, all of the outstanding partnership interests in the Partnership were held by PIC, with a 60.0% partnership interest, and Embarcadero Center Investors Partnership, a California limited partnership ("ECIP"), with a 40% partnership interest. ------ D. Pursuant to that certain Master Transaction Agreement, dated September 28, 1998 (the "Master Transaction Agreement"), by and among (i) The Prudential ---------------------------- Insurance Company of America, a New Jersey corporation, PIC, Fedmark Corporation, a Delaware corporation ("Fedmark"), ECIP, Pacific Property Services, L.P., a California limited partnership, and the other persons identified therein on Exhibit A thereto, on the one hand, and (ii) Boston --------- Properties Limited Partnership, a Delaware limited partnership (the "Operating --------- Partnership"), and Boston Properties, Inc., a Delaware corporation ("Public - ----------- ------ Company") on the other hand, the Operating Partnership acquired the right, - ------- subject to the satisfaction of various conditions, to have all of the partners of ECIP contribute to the Operating Partnership all of their interests in ECIP. On November 12, 1998, the closing of the transactions contemplated by the Master Transaction Agreement occurred, and the Operating Partnership directed the partners of ECIP to convey their interests in ECIP to BP EC1 Holdings LLC, a Delaware limited liability Company ("Holdings 1 LLC") and the partners of ECIP did so convey their interests in ECIP to Holdings 1 LLC (which conveyance constituted a contribution to the Operating Partnership). Upon such conveyance, by operation of law ECIP dissolved and Holdings 1 LLC succeeded to ECIP's 40% partnership interest in the Partnership. Prior to the amendment and restatement of this Agreement, Holdings 1 LLC conveyed to BPLLC a 0.4% partnership interest in the Partnership and conveyed to Holdings LLC a 39.6% Partnership interest in the Partnership. As a result of the foregoing, (i) ECIP (the "Withdrawing ----------- Partner") has ceased to be a partner of the Partnership, (ii) BPLLC and Holdings - ------- LLC have been admitted as partners of the Partnership, and (iii) as of the date hereof BPLLC, PIC and Holdings LLC are the sole partners of the Partnership with percentage interests of 0.4%, 60.0% and 39.6%, respectively. E. To reflect the transfers, successions, admissions and withdrawals recited above, to provide for the continuation of the Partnership as a California general partnership under the Act, and to provide for the revised terms and conditions under which the Partnership will continue in existence and be governed, the parties wish to amend and restate the Prior Partnership Agreement in its entirety, as provided herein. NOW, THEREFORE, in consideration of the foregoing, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows: I. Transfer of Partnership Interests. Pursuant to the transactions --------------------------------- described in the Recitals above, the Withdrawing Partners have ceased to be partners in the Partnership, BPLLC has been admitted as the Managing General Partner of the Partnership with a 0.4% Percentage Interest and Holdings LLC has been admitted as a Non-Managing General Partner of the Partnership with a 39.6% Percentage Interest. PIC shall continue as a Non-Managing General Partner of the Partnership with a 60.0% Percentage Interest. II. Amendment and Restatement. The Original Partnership Agreement is ------------------------- hereby amended and restated in its entirety as follows: 2 ARTICLE 1 - THE PARTNERSHIP SECTION 1.1 Continuation of the Partnership. ------------------------------- The Partners hereby agree to continue the Partnership as a general partnership under and pursuant to the Uniform Partnership Act of the State of California (the "Act") as the same is now or hereafter amended. The Partners --- shall promptly execute, and the Managing General Partner shall promptly cause to be filed with the proper offices, any certificate or amendments thereto required by the Act or any other applicable partnership act, fictitious name act, or similar statute in effect, or for any reasonable purpose. SECTION 1.2 Partnership Name. ---------------- The name of the Partnership shall continue to be "EMBARCADERO CENTER ASSOCIATES." All business of the Partnership shall be conducted under such name or under such variations thereof as the Managing General Partner deems necessary or appropriate to comply with the requirements of law in any applicable jurisdiction in which the Partnership may do business. SECTION 1.3 Place of Business. ----------------- The principal place of business of the Partnership shall be c/o Boston Properties, Inc., Four Embarcadero Center, Suite 2600, San Francisco, California 94111, or at such other place or places as the Managing General Partner may designate. SECTION 1.4 General Partnership. ------------------- The Partnership shall be a general partnership, governed by the Act. The interests of the Partners in the Partnership shall be personal property for all purposes. All real and other property owned by the Partnership shall be deemed owned by the Partnership, as a partnership, and no Partner, individually, shall have any ownership of such property. SECTION 1.5 Term of Partnership. ------------------- The term of the Partnership shall continue until 12:00 noon on December 31, 2050, unless sooner terminated in accordance with the terms and conditions of this Agreement, or by applicable law. SECTION 1.6 Purposes of the Partnership. --------------------------- The purpose of the Partnership shall be: 3 (a) to own, manage, develop, improve, renovate, rehabilitate, operate, hold for investment, lease, encumber, mortgage, pledge, assign, exchange, sell and/or otherwise deal with the Property; (b) to retain managing agents and consultants therefor, and to do all things necessary or useful in connection with any of the foregoing; (c) in addition to, and in furtherance of these purposes and powers, the Partnership shall have the power (i) to borrow money and issue evidences of indebtedness and to secure same by mortgage, pledge or other lien (including, without limitation, obtaining the Equity Redemption Loan and Prudential Guarantied Loan), and (ii) to guarantee the obligations of any other Person when done in furtherance of the Partnership's business, including any indebtedness of such Person, and to secure such guarantee obligations by mortgage, pledge or other lien on any asset of the Partnership; (d) to make and service the Investment Loan as contemplated herein; (e) subject to the express terms, provisions and restrictions of this Agreement, to engage in and consummate the transactions described in the Master Transaction Agreement; (f) to enter into the Redemption Agreement and consummate the transactions described therein; and (g) to enter into, perform and carry out contracts of any kind necessary to, or in connection with, or incidental to the accomplishment of any of the foregoing purposes; and (h) to use the Excess Mortgage Loan Proceeds to make the Special BP Loan. The Partnership shall not engage in any other business. It is further agreed that the Partnership shall at all times adhere to at least the level of quality in the maintenance and operation of the Property as a first class office and retail complex as maintained by the Partnership during the twelve (12) month period preceding the date hereof. SECTION 1.7 Definitions. ----------- In addition to the capitalized terms defined in the recitals and elsewhere herein, the following terms shall have the following meanings: "Act" has the meaning set forth in Section 1.1 hereof. --- 4 "Affiliate" means, with respect to any Person, any Person directly or --------- indirectly controlling, controlled by or under common control with such Person. For purposes of this definition, "control," when used with respect to any Person, means the power to direct the management and policies of such Person, directly or indirectly, whether through the ownership of voting securities, by contract or otherwise, and the terms "controlling" and "controlled" have meanings correlative to the foregoing. No officer, director or equity owner of the Managing General Partner shall be considered an Affiliate of the Managing General Partner solely as a result of serving in such capacity or being an equity owner of the Managing General Partner. "Approved Loan Costs" shall mean all fees, costs and expenses incurred by ------------------- the Partnership or any Partner in connection with the Equity Redemption Loan or Prudential Guarantied Loan that are expressly approved by each of the Partners (which approval shall not be unreasonably withheld, conditioned or delayed), including, without limitation, (i) all fees and expenses of the lender(s) thereof subject to reimbursement by the Partnership or any Partner, and (ii) all of the reasonable legal fees and expenses incurred directly by such Persons (or any of their constituent owners) in connection with the Equity Redemption Loan and the Prudential Guarantied Loan. "Borrowing Costs" of a loan shall mean the cost of procuring and repaying --------------- such loan expressed as an "all-in" effective annual interest rate per annum to be determined taking into account all costs of procuring and repaying such loan including, without limitation, all (i) periodic interest and other amounts due and payable in connection with such loan, (ii) all loan points and fees paid with respect to such loan, (iii) all fees and expenses of the lender(s) thereof that are subject to payment or reimbursement by the borrower in connection therewith, and (iv) all legal fees and expenses incurred by the borrower in connection therewith; provided that, all points, fees, costs and expenses will -------- ---- be amortized on a straight-line basis over the term of the loan. "BP Note" means a note, in the form and for a purpose described in Exhibit ------- ------- B hereto, given by the Partnership to the Managing General Partner or any of its - - Affiliates. "BP Partners" means Boston Properties LLC, the Managing General Partner, ----------- and BP EC2 Holdings LLC, a Non-Managing General Partner. "Capital Contributions" means, with respect to any Partner, the amount of --------------------- money and the initial fair market value of any property (other than money) contributed to the Partnership with respect to the interest in the Partnership held by such Person less the amount of liabilities to which such property is subject and which the Partnership is considered to assume pursuant to the provisions of Section 752 of the Code (as defined below). "Code" means the Internal Revenue Code of 1986, as amended from time to ---- time (or any corresponding provisions of succeeding law). 5 "Equity Redemption Loan" shall mean a loan to the Partnership governed by ---------------------- the term loan agreement described on Exhibit C attached hereto, a true, correct --------- and complete copy of which has been delivered to each of the Partners prior to the date hereof. "Equity Redemption Loan" shall also include any extension or modification of the Equity Redemption Loan and any new loan obtained by the Partnership to replace or refinance the Equity Redemption Loan; provided that, -------- ---- any such extension, modification or new loan shall be in compliance with the terms and provisions of this Agreement and the Redemption Agreement. "Excess Mortgage Loan Proceeds" shall mean the excess proceeds of any new ----------------------------- mortgage loan borrowing secured by the Real Property over and above the amounts of such proceeds used to (i) repay any existing mortgage debt secured by the Real Property prior to the date hereof, (ii) pay any prepayment penalty, premium or fee in connection with any such existing mortgage loan that is repaid, and (iii) pay the transaction costs incurred by the Partnership in connection with such borrowing or the prepayment of any existing mortgage loan. "Indemnitee" means (i) any Person made a party to a claim or proceeding by ---------- reason of (A) his or its status as a Partner, or as a director or officer of the Partnership or a Partner, or (B) his or its liabilities, pursuant to a loan guarantee or otherwise, for any indebtedness of the Partnership (including, without limitation, any indebtedness which the Partnership has assumed or taken assets subject to); and (ii) such other Persons (including Affiliates of a Partner or the Partnership) as the Managing General Partner may reasonably designate from time to time (whether before or after the event giving rise to potential liability), for a purpose related to Partnership business. "Interest Rate Approved Loan Costs" has the meaning given thereto in --------------------------------- Section 2.5(e)(i). "Investment Loan" shall mean a loan made by the Partnership to the --------------- Investment Loan Borrower in an amount equal to $111,927,000 pursuant to (and in accordance with the terms and provisions of) that certain Note Purchase Agreement of even date herewith, by and between the Partnership and Investment Loan Borrower. "Investment Loan Borrower" shall mean Prudential Realty Securities, Inc., a ------------------------ Delaware corporation. "Investment Notes" means the promissory notes of the Investment Loan ---------------- Borrower acquired by the Partnership in connection with the Investment Loan. "Managing General Partner" means Boston Properties LLC, a Delaware limited ------------------------ liability company, and any other Person who may become a Managing General Partner pursuant to the terms of this Agreement, in either case until such Person has ceased to be a Managing General Partner pursuant to the terms of this Agreement. "Non-Managing General Partner" means BP EC2 Holdings LLC, a Delaware ---------------------------- limited liability company, and PIC Realty Corporation, a Delaware corporation, and any other Person 6 who may become a Non-Managing General Partner pursuant to the terms of this Agreement, in each such case until such Person has ceased to be a Non-Managing General Partner pursuant to the terms of this Agreement. "Non-Managing General Partners" means all such Persons, if there is more than one. If at any time there is more than one Non-Managing General Partner, then all references herein to the Non-Managing General Partner shall, unless the context requires otherwise, be deemed to refer to the Non-Managing General Partners. "Partnership" means the partnership governed by this Agreement and any ----------- partnership continuing the business of the Partnership in the event of dissolution as herein provided. "Percentage Interest" means, with respect to any Partner, the Percentage ------------------- Interest set forth opposite such Partner's name on Schedule A. In the event any ---------- Partner's interest in the Partnership is transferred in accordance with the provisions of this Agreement, the transferee of such interest shall succeed to the Percentage Interest of his transferor to the extent it relates to the transferred interest. "Person" means any individual, partnership, corporation, trust, or other ------ entity. "Property" shall mean the Real Property, including all real property, -------- improvements, leases, licenses, fixtures and tangible and intangible personal property (including, without limitation, cash, deposit accounts, money and other sums and Investment Notes so long as the Partnership holds the same) owned by the Partnership from time to time. "Prudential Guarantied Loan" shall mean a loan to the Partnership governed -------------------------- by the term loan agreement described on Exhibit D attached hereto, a true, --------- correct and complete copy of which has been delivered to each of the Partners prior to the date hereof. "Redemption Agreement" shall mean that certain Redemption Agreement of even -------------------- date herewith, by and among the Partnership and each of the Partners. "Redemption Distribution" means the distribution to PIC, in full redemption ----------------------- of its interest in the Partnership, of all or a portion of the Investment Notes and, if applicable, cash, as determined in accordance with the Redemption Agreement. "Regulations" means the Income Tax Regulations promulgated under the Code, ----------- as such regulations may be amended from time to time (including corresponding provisions of succeeding regulations). "Special BP Loan" shall mean a loan in the principal amount equal to the --------------- Excess Mortgage Loan Proceeds and at an interest rate per annum equal to twelve (12) basis points above the Borrowing Costs of the Excess Mortgage Loan Proceeds, made by the Partnership to any BP Partner, or any Affiliate of any BP Partner and evidenced by a promissory note in the form of Exhibit G attached --------- hereto. 7 "Transfer" means, as a noun, any voluntary or involuntary transfer, sale, -------- pledge, hypothecation, or other disposition and, as a verb, voluntarily or involuntarily to transfer, sell, pledge, hypothecate, or otherwise dispose of. ARTICLE 2 - CAPITALIZATION SECTION 2.1 Partners' Percentage Interests. ------------------------------ The names and Percentage Interests of the Partners are set forth on Schedule A hereto. - ---------- SECTION 2.2 Additional Capital Contributions; Limitations on Future ------------------------------------------------------- Capital Contributions; Obligation of Managing Partner to -------------------------------------------------------- Purchase BP Notes. ----------------- (a) No Partner shall, except as otherwise required by the Act, other applicable law or this Agreement, be required to make any further Capital Contributions to the Partnership, and so long as PIC or any Affiliate of PIC is a Partner, no Capital Contributions shall be made to the Partnership without the prior written consent of PIC. (b) At no time prior to the second anniversary of the Redemption Distribution shall the Managing General Partner call or accept Capital Contributions from any Partner for the purpose of repaying the Equity Redemption Loan or any debt replacing or refinancing the Equity Redemption Loan, and during such period no Capital Contributions made after the date hereof shall be used in such manner. (c) To the extent that it is necessary or desirable for the Partnership, in the sole discretion of the Managing General Partner, to raise cash for the purpose of funding working capital, capital expenditures, leasing commissions, tenant improvements or other expenditures relating to the Property at a time when the Partnership is unable to raise such cash through the receipt of Capital Contributions because of the prohibition set forth in Section 2.2(a), the Managing General Partner agrees that it (or an Affiliate of the Managing General Partner) will lend funds to the Partnership for such purposes by purchasing BP Notes from the Partnership. SECTION 2.3 Admission of Additional Partners. -------------------------------- The Managing General Partner shall have the right, from time to time, provided it obtains the consent of the Non-Managing General Partners, to admit additional Non-Managing General Partners to the Partnership. Upon the admission of any new Non-Managing General Partner, an amendment of this Agreement, reflecting such change, shall be signed by the Managing General Partner and the additional Non-Managing General Partner, and an amendment to the Certificate, reflecting such change, to the extent required or appropriate under applicable law, shall be signed by all Partners 8 either individually or by the Managing General Partner on their behalf and filed with the Secretary of State of the State of California. SECTION 2.4 Return of Capital Accounts and Redemption of Partnership -------------------------------------------------------- Interests. --------- Except as otherwise provided in this Agreement or as set forth in the Redemption Agreement, (i) no Partner shall have the right to demand and withdraw a return of its Capital Account, and (ii) no Partner shall have the right to receive property other than cash upon a distribution to the Partners, redemption of any Partner's interest or liquidation of the Partnership. No Partner shall receive any interest, salary, or drawing with respect to its Capital Contributions or its Capital Account or for services rendered on behalf of the Partnership or otherwise in its capacity as Partner, except (i) interest received, if any, on BP Notes or (ii) as otherwise provided in this Agreement. SECTION 2.5 Investment Loan, Equity Redemption Loan, Prudential --------------------------------------------------- Guarantied Loan, Existing Loans and Replacement Loans. ----------------------------------------------------- (a) The Partnership is hereby authorized to, and shall, make the Investment Loan to Investment Loan Borrower and acquire the Investment Notes on the date hereof. (b) The Partnership is hereby authorized to, and shall, borrow the Equity Redemption Loan and Prudential Guarantied Loan on the date hereof and shall thereafter perform its obligations in respect thereof subject to the terms and limitations of this Agreement. The proceeds of the Equity Redemption Loan and Prudential Guarantied Loan shall be applied to make the Investment Loan and acquire the Investment Notes on the date hereof. (c) In accordance with Section 2.2(b), the Partnership shall not, at any time prior to the second anniversary of the Redemption Date, use Capital Contributions made after the date hereof for the purpose of repaying the Equity Redemption Loan or any debt replacing the Equity Redemption Loan. (d) Except as otherwise expressly provided in this Agreement, all costs, fees, penalties and expenses incurred in connection with the satisfaction of any debt of the Partnership on the date hereof shall be paid by PIC, on the one hand, and the BP Partners, on the other hand, in accordance with the terms and provisions of Exhibit V to the Master Transaction Agreement. All Borrowing --------- Costs of the Excess Mortgage Loan Proceeds ("Excess Proceeds Borrowing Costs") ------------------------------- shall be paid by the Partnership and capitalized and amortized over the term of the loan from which the Excess Mortgage Loan Proceeds were derived. All other Borrowing Costs incurred in connection with any Partnership borrowing (other than those described hereinabove and in subsection (e) below) shall be paid by -------------- the BP Partners. (e) Notwithstanding anything to the contrary provided in this Agreement, all costs, fees and expenses incurred in connection with the consummation of the Equity 9 Redemption Loan and Prudential Guarantied Loan shall be paid by the Partnership and borne by the Partners (and reflected in the Partnership's books as follows): (i) Any and all Approved Loan Costs paid in order to reduce or lock the interest rate for the Equity Redemption Loan or Prudential Guarantied Loan (including, without limitation, interest rate lock fees and loan points charged to obtain a reduced, fixed or more favorable rate (collectively, "Interest Rate Approved Loan Costs")) shall be paid by the --------------------------------- Partnership and capitalized and amortized over the term of the appropriate loan; (ii) All other Approved Loan Costs shall be paid by the Partnership as current expenses and borne by each Partner in accordance with its Percentage Interest on the date hereof; (iii) Any other costs and expenses incurred by the Partnership with respect to the Equity Redemption Loan shall be paid by the BP Partners; and (iv) Any other costs and expenses incurred by the Partnership with respect to the Prudential Guarantied Loan shall be paid by PIC. ARTICLE 3 - ALLOCATIONS OF PROFITS AND LOSSES AND MAINTENANCE OF CAPITAL ACCOUNTS SECTION 3.1 Capital Accounts and Allocations of Profit and Loss. --------------------------------------------------- (a) Capital Accounts. A separate capital account (a "Capital ---------------- ------- Account") shall be maintained for each Partner in accordance with Section 1.704- 1(b)(2)(iv) of the Regulations, and this Section 3.1 shall be interpreted and applied in a manner consistent with such section of the Regulations. The Partnership may, at the election of the Managing General Partner, adjust the Capital Accounts of its Partners to reflect revaluations of the Partnership property whenever the adjustment would be permitted under Regulations Section 1.704-1(b)(2)(iv)(f). In the event that the Capital Accounts of the Partners are so adjusted, (i) the Capital Accounts of the Partners shall be adjusted in accordance with Regulations Section 1.704-1(b)(2)(iv)(g) for allocations of depreciation, depletion, amortization and gain or loss, as computed for book purposes, with respect to such property, and (ii) the Partners' distributive shares of depreciation, depletion, amortization and gain or loss, as computed for tax purposes, with respect to such property shall be determined so as to take account of the variation between the adjusted tax basis and book value of such property in the same manner as under Section 704(c) of the Code. In the event that Code Section 704(c) applies to partnership property, the Capital Accounts of the Partners shall be adjusted in accordance with Regulations Section 1.704-1(b)(2)(iv)(g) for allocations of depreciation, depletion, amortization and gain and loss, as computed for book purposes, with respect to such property. The Partners' distributive shares of depreciation, depletion, amortization and gain or loss, as computed for tax purposes, with respect to such property shall 10 be determined so as to take account of the variation between the adjusted tax basis and book value of such property in the same manner as under Code Section 704(c), and the amount of upward and/or downward adjustments to the book value of the Partnership property shall be treated as income, gain, deduction and/or loss for purposes of applying the allocation provisions of this Article 3. In the event that Code Section 704(c) applies to Partnership property, the Capital Accounts of the Partners shall be adjusted in accordance with Regulations Section 1.704-1(b)(2)(iv)(g) for allocations of depreciation, depletion, amortization and gain and loss, as computed for book purposes, with respect to such property. The amount of all distributions to Partners shall be determined pursuant to Section 4.1 hereof. Notwithstanding any provision contained herein to the contrary, no Partner shall be required to restore any negative balance in its Capital Account. (b) Allocation of Profit and Loss. Generally, all profits and losses ----------------------------- will be allocated in accordance with the Percentage Interests of the Partners. It is the intention of the Partners that all items of Partnership income, gain, loss, and deduction, as determined for book purposes, shall be allocated among the Partners, and shall be credited or debited to their respective Capital Accounts in accordance with Regulations Section 1.704(b)(2)(iv), so as to ensure to the maximum extent possible (i) that such allocations satisfy the economic effect equivalence test of Regulations Section 1.704(b)(2)(ii)(i), by allocating items that can have economic effect in such a manner that the balance of each Partner's Capital Account at the end of any taxable year (increased by such Partner's "share of Partnership minimum gain and Partner minimum gain", as defined in Regulations Section 1.704-2) would be positive in the amount of cash that such Partner would receive (or would be negative in the amount of cash that such Partner would be required to contribute to the Partnership) if the Partnership sold all of its property for an amount of cash equal to the book value (as determined pursuant to Regulations Section 1.704-1(b)(2)(iv)) of such property (reduced, but not below zero, by the amount of nonrecourse debt to which such property is subject) and all of the cash of the Partnership remaining after payment of all liabilities (other than nonrecourse liabilities) of the Partnership were distributed in liquidation immediately following the end of such taxable year pursuant to Article 9, and (ii) that all allocations of items that cannot have economic effect (including credits and nonrecourse deductions) are allocated to the Partners in accordance with the Partners' interests in the Partnership, which, unless otherwise required by Code Section 704(b) and the Regulations promulgated thereunder, shall be their Percentage Interests for the taxable year. (c) Section 704(c) Items. Except to the extent otherwise required by -------------------- the Code, Regulations Section 1.704-3 shall apply to all tax allocations governed by Code Section 704(c) and all "reverse section 704(c) allocations". The Managing General Partner shall determine the method of allocation to be used pursuant to Regulations Section 1.704-3 and shall make all elections under such section; provided, however, that with respect to the "reverse Section 704(c) -------- ------- allocations," caused by the transfers contemplated by the Master Transaction Agreement, the Partnership will use the "traditional method without curative allocations." (d) The tax returns for the Partnership for the 1998 calendar year shall be prepared using the interim closing of the books method. 11 ARTICLE 4 - DISTRIBUTIONS SECTION 4.1 Distributions. ------------- (a) Except as provided in Section 4.1(b) or Section 7.5, and subject to the needs of the Partnership to accumulate reserves, which prior to the Redemption Distribution shall be determined in the sole discretion of the Managing General Partner, distributions to the Partners shall be made in proportion to the Partners' Percentage Interests. Distributions shall be made from time to time at the discretion of the Managing General Partner. (b) Notwithstanding anything to the contrary provided in this Agreement, all payments in respect of title insurance received by the Partnership the amount of which was affected by the non-imputation endorsement to the Partnership's title insurance policy issued as of the date hereof with respect to the Property will be distributed only to the BP Partners in proportion to their respective Percentage Interests. SECTION 4.2 Amounts Withheld. ---------------- All amounts withheld pursuant to the Code or any provision of any state or local tax law with respect to any payment or distribution to the Partnership, the Managing General Partner or the Non-Managing General Partners shall be treated as amounts distributed to the Managing General Partner or Non-Managing General Partners pursuant to this Article for all purposes under this Agreement. The Managing General Partner may allocate any such amounts among the Partners in any manner that is in accordance with applicable law. ARTICLE 5 - MANAGEMENT OF THE PARTNERSHIP SECTION 5.1 Management. ---------- The management powers over the business and affairs of the Partnership are and shall be exclusively vested in the Managing General Partner, who shall be subject to the provisions of this Agreement and to applicable law, and, subject to the consent rights set forth in Section 5.4 hereof, no Non-Managing General Partner shall have any right to participate in or exercise control or management power over the business and affairs of the Partnership. 12 SECTION 5.2 Rights to Delegate and Employ. ----------------------------- The Managing General Partner shall devote such time and effort to the Partnership as it deems necessary and may retain agents as reasonably required or desirable to assist it. The Managing General Partner shall review the status and condition of the Property and shall supervise the activities of any agents engaged by it. The Managing General Partner may delegate any of its powers, rights and obligations hereunder, and, in furtherance of any such delegation, may appoint, employ, contract or otherwise deal with any Person (including Affiliates, but only so long as such employment, contract or other deal is not less favorable to the Partnership than would be an arms-length transaction on market terms) for the transaction of the business of the Partnership, which Persons may, under the supervision of the Managing General Partner, perform any acts or services for the Partnership as the Managing General Partner may approve. SECTION 5.3 Enumeration of Specific Rights and Powers. ----------------------------------------- Subject to Section 5.4, the Managing General Partner shall have all the rights and powers which may be possessed by a general partner in a partnership formed under the Act, which are otherwise conferred by law or which are necessary, advisable or convenient to the discharge of duties under this Agreement and to the management, direction and control of the business and affairs of the Partnership, exercisable without the consent of the Non-Managing General Partners (except as herein expressly provided), including the following rights and powers: (a) to conduct the tax, financial and business affairs of the Partnership; (b) to take all action necessary to acquire, purchase, renovate, rehabilitate, hold, own, improve, operate, encumber, mortgage, pledge, assign, exchange, or to sign notes or guarantee payment of any loans relating to the purposes of the Partnership; (c) to manage, repair, insure, service, promote, advertise, lease, sublease, and create or release interests in the Partnership property; (d) to timely pay out of Partnership funds such expenses as are necessary to carry out the intentions and purposes of the Partnership including real estate taxes and debt service payments to the extent there is sufficient gross cash proceeds. (e) to sell and/or otherwise dispose of all or any portion of the Property; (f) to make appropriate elections permitted under any applicable tax law, provided that such elections will not, in the opinion of counsel or the accountants for the Partnership, be disadvantageous to a majority in interest of the Non-Managing General Partners; (g) to change the principal office of the Partnership to other places subject to the notice provision herein provided; 13 (h) to employ agents, attorneys, public accountants (which shall be, in all events, a "Big Five" accounting firm), and depositories and to grant powers of attorney; (i) to employ persons necessary and appropriate in the operation and management of the Partnership and the Property, including, but not limited to, supervisory managing agents, insurance brokers, real estate brokers, and loan brokers, on such terms and for such compensation which does not exceed generally prevailing market rates, all to act under the supervision of the Managing General Partner, and the Managing General Partner on behalf of the Partnership is hereby authorized to enter into an agreement with any Managing General Partner in their individual capacities or a corporation or other entity affiliated with any Managing General Partner for the performance of such services to the Partnership except as otherwise provided for in this Agreement; (j) to enter into any contract of insurance which the Managing General Partner deems necessary and proper for the protection of the Partnership, the conservation of the Property or any other asset of the Partnership, or for a purpose convenient or beneficial to the Partnership, including but not limited to, a contract naming the Managing General Partner as additional insured, and to continue in force any policies required by any mortgage, lease or other agreement relating to the Property or any part thereof; provided that, so long -------- ---- as PIC or any Affiliate of PIC is a Partner, (i) the Partnership shall maintain reasonable and customary insurance with respect to the Property with amounts and types of coverage that are at least comparable to that maintained by Affiliates of the BP Partners with respect to other properties owned by such Affiliates (after giving effect to differences in the value and nature of such properties) and (ii) the Partnership shall maintain business interruption and commercial general liability insurance in at least the amounts set forth on Exhibit E --------- hereto; (k) to pay, collect, compromise, arbitrate, resort to legal action or otherwise make or defend claims or demands of or against the Partnership; provided that, so long as PIC, or an Affiliate of PIC, is a Partner, neither the - -------- ---- Managing General Partner nor the Partnership shall compromise or settle any claim or demand of, or against, the Partnership without PIC's, or its Affiliate's, consent, which consent will not be unreasonably withheld; (l) to borrow money and issue evidences of indebtedness in furtherance of any and all purposes of the Partnership, including borrowings from Partners of the Partnership, as contemplated by Section 5.7 hereof or otherwise, and including borrowings made in accordance with the financing plan for the Partnership described in Exhibit F hereto; to guarantee the obligations of any --------- other Person (but only when such guaranty is made in furtherance of the business of the Partnership), including the indebtedness of such Person; and to secure any or all of the above by mortgage, pledge, guaranty or other lien on the Property and/or any other asset of the Partnership; and (m) to lend money to any BP Partner or any Affiliate of any BP Partner pursuant to a Special BP Loan. 14 SECTION 5.4 Limitations on Managing General Partner's Authority. --------------------------------------------------- (a) Notwithstanding anything in this Agreement to the contrary, for so long as PIC is a Partner, the Managing General Partner shall not have the power or authority to, and shall not, cause the Partnership to take any of the following actions, without the consent of PIC, which consent shall not be unreasonably withheld: (i) other than in the ordinary course of business, cause any closing of a material portion of the Property for renovations (other than repairs necessitated as a result of a fire or other casualty); (ii) cause or permit the engagement by the Partnership in any business other than as contemplated under Section 1.6; ----------- (iii) take any action or make any decision involving credit, management or servicing decisions relating to the Investment Notes other than making an election to accelerate the Investment Notes upon the occurrence of (and during the continuance of) an Event of Default or taking any action or decision relating to the Redemption Distribution; (iv) make a loan to or guarantee the indebtedness of any Person other than (A) loans to tenants of the Property for tenant improvements or (B) a Special BP Loan; (v) cause or permit the sale of (A) all or any material portion of the Property, except leases, concessionaire agreements and space licenses entered into in the ordinary course of business of the Property, or (B) except in connection with the Redemption Distribution, the Investment Notes or any portion thereof or interest therein; (vi) cause the Partnership to (A) obtain any borrowing, (B) issue evidences of indebtedness, or (C) guaranty the obligations of any Person, if such borrowing, issuance or guaranty provides for recourse to PIC (other than the Prudential Guarantied Loan or the Equity Redemption Loan or any Replacement Debt (as defined in Exhibit F); (vii) amend this Agreement if such amendment affects or could affect (A) the receipt, amount or timing of any distributions to PIC, or (B) PIC's rights or obligations under this Agreement or the Redemption Agreement; (viii) cause the dissolution of the Partnership, or cause the Partnership to file or otherwise commence a voluntary bankruptcy case, or consent to the commencement of an involuntary bankruptcy case, under the United States Code or under any other applicable bankruptcy, insolvency or similar law now or hereafter in effect, or consent to the entry of an order for relief in an involuntary case, or consent to the 15 appointment of or taking possession by a receiver, trustee or other custodian for all or a substantial part of the Property; (ix) borrow money from the Managing General Partner or any Affiliate of the Managing General Partner except as permitted or required under Sections 2.2(c) and 5.7 or otherwise in this Agreement; ----------------------- (x) assign, relinquish, settle, compromise, waive or impair any of the Partnership's rights under or with respect to, or amend, terminate, extend the term of (or time for payments due, or performance to be rendered, to the Partnership under) or otherwise modify any instrument or agreement under which the Partnership has rights and to which the Managing General Partner or any of its Related Parties is a party; or (xi) engage in any activity without a good faith business purpose therefor and with the intent of manipulating the "Operating Profits" or "Operating Losses" of the Partnership described in the Redemption Agreement in a manner intended to materially adversely affect, to the benefit of the other Partners, the amounts that PIC would be entitled to receive under this Agreement or the Redemption Agreement. SECTION 5.5 Filing of Returns and Other Writings. ------------------------------------ The Managing General Partner shall be the Tax Matters Partner and is also specifically authorized to and shall cause the preparation and timely filing of all Partnership tax returns and shall, on behalf of the Partnership, subject to the terms and provisions of the Redemption Agreement, make such tax elections for the Partnership as it, after consultation with the Partnership's accountants, shall determine to be in the best interests of the Partners. In addition, the Managing General Partner shall timely file all other forms, documents or other writings with respect to the business and operation of the Partnership which shall be required by any governmental agency or authority having jurisdiction to require such forms, documents or other writings, and shall transmit to each Partner any form or document required to be transmitted by any such governmental agency. SECTION 5.6 Other Permissible Activities. ---------------------------- Nothing herein contained shall be deemed to prevent any Partner or any shareholder or affiliate thereof from engaging in other activities for profit, whether in the real estate business or otherwise. The Managing General Partner (or any shareholder or affiliate thereof), or any Partner, may, in the future, organize and manage joint ventures, additional limited partnerships or other business entities for the acquisition, management and sale of real estate. Neither this Agreement nor any activity undertaken pursuant hereto shall prevent any Partner or any affiliate from engaging in such activities, or require any Partner to permit the Partnership or any Partner to participate in any such activities and, as a material part of the consideration for each Partner's execution hereof, each Partner, for the benefit of the other Partners, hereby waives, relinquishes and renounces any such right or claim of participation. 16 SECTION 5.7 Contracts with Affiliates; Borrowing from Partners. -------------------------------------------------- The Managing General Partner is authorized to enter into agreements on behalf of the Partnership with other persons or entities affiliated with the Partnership and the Partners, including with respect to the borrowing of money from, and issuance of evidences of indebtedness to, Partners of the Partnership in furtherance of any and all purposes of the Partnership, including borrowing from the Managing General Partner or any of its Affiliates for the purposes and on the terms set forth on Exhibit B attached hereto and incorporated herein by --------- reference; provided, however, that all such agreements (other than the giving of -------- ------- BP Notes and the making of the Special BP Loans) shall be disclosed to the other Partners and shall not be less favorable to the Partnership than had such agreement been negotiated at arms-length and on market terms. Notwithstanding any other provision of this Agreement, it is acknowledged and agreed that an Affiliate of the Managing General Partner shall enter into a management agreement with the Partnership for a management fee that does not exceed the management fee that was payable to Pacific Property Services, L.P. (the previous management company that managed the Property) as of May 1, 1998. SECTION 5.8 Indemnification. --------------- (a) To the fullest extent permitted by California law, the Partnership shall indemnify each Indemnitee from and against any and all losses, claims, damages, liabilities, joint or several, expenses (including, without limitation, attorneys fees and other legal fees and expenses), judgments, fines, settlements, and other amounts arising from any and all claims, demands, actions, suits or proceedings, civil, criminal, administrative or investigative, that relate to the operations of the Partnership as set forth in this Agreement, in which such Indemnitee may be involved, or is threatened to be involved, as a party or otherwise, unless it is established that: (i) the act or omission of the Indemnitee was material to the matter giving rise to the proceeding and either was committed in bad faith, was the result of active and deliberate dishonesty, or was the result of a breach of this Agreement by such Indemnitee (or by the Partner of which such Indemnitee is a director or officer); or (ii) the Indemnitee actually received an improper personal benefit in money, property or services, or in the case of any criminal proceeding, the Indemnitee had reasonable cause to believe that the act or omission was unlawful. Without limitation, the foregoing indemnity shall extend to any liability of any Indemnitee, pursuant to a loan guaranty (except a guaranty by a Partner of nonrecourse indebtedness of the Partnership or as otherwise provided in any such loan guaranty) or otherwise for any indebtedness of the Partnership, and the Managing General Partner is hereby authorized and empowered, on behalf of the Partnership, to enter into one or more indemnity agreements consistent with the provisions of this Section 5.8 in favor of any Indemnitee having or potentially having liability for any such indebtedness. The termination of any proceeding by conviction of an Indemnitee or upon a plea of nolo contendere or its equivalent by an Indemnitee, or an entry of an order of probation against an Indemnitee prior to judgment, creates a rebuttable presumption that such Indemnitee acted in a manner contrary to that specified in this Section 5.8(a). Any indemnification pursuant to this Section 5.8 shall be made only out of the assets of the Partnership and shall not impose any personal liability on any Partner, and neither the Managing General Partner nor any Non-Managing General 17 Partner shall have any obligation to contribute to the capital of the Partnership, or otherwise provide funds, to enable the Partnership to fund its obligations under this Section 5.8. (b) If the Managing General Partner avails itself of the indemnification provisions set forth herein, the Managing General Partner shall promptly notify in writing the other Partners of such fact and shall provide a brief description of the nature and magnitude of the indemnification claimed. An Indemnitee, other than the Managing General Partner, may assert a claim for indemnification hereunder by giving written notice thereof to the Managing General Partner. If indemnification is sought for a claim or liability asserted by a third party, the Indemnitee shall also give written notice thereof to the Managing General Partner promptly after it receives notice of the claim or liability being asserted. Such notice shall summarize the bases for the claim for indemnification and any claim or liability being asserted by a third party. The Managing General Partner, on behalf of the Partnership, shall be entitled to direct the defense against a third party claim or liability with counsel selected by it (subject to the consent of the Indemnitee, which consent shall not be unreasonably withheld) as long as the Partnership is conducting a good faith and diligent defense. The Indemnitee shall, at all times, have the right to fully participate in the defense of a third party claim or liability at its own expense, directly or through counsel; provided, however, that if the named -------- ------- parties to the action or proceeding include both the Partnership and the Indemnitee, and the Indemnitee is advised by counsel that representation of both parties by the same counsel would be inappropriate under applicable standards of professional conduct, the Indemnitee may engage separate counsel, whose reasonable fees and expenses shall be borne by the Partnership. If no notice of intent to dispute and defend a third party claim or liability is given by the Managing General Partner within 20 business days of receiving notice of such claim or liability, the Indemnitee shall have the right, at the expense of the Partnership, to undertake the defense of such claim or liability (with counsel selected by the Indemnitee), and to compromise or settle it, exercising reasonable business judgment. If the third party claim or liability is one that, by its nature, cannot be defended solely by the Partnership, then the Indemnitee shall make available such information and assistance as the Managing General Partner may reasonably request and shall cooperate with the Partnership in such defense, at the expense of the Partnership. (c) Subject to the procedures set forth in Section 5.8(b), reasonable expenses incurred by an Indemnitee who is a party to a proceeding in a matter for which the Indemnitee has undertaken the defense pursuant to the provisions of this Section 5.8 (other than as a result of the rejection or dispute by the Managing General Partner of a claim for indemnification under Section 5.8(b)) shall be paid or reimbursed by the Partnership in advance of the final disposition of the proceeding upon receipt by the Partnership of (i) a written affirmation by the Indemnitee of the Indemnitee's good faith belief that the standard of conduct necessary for indemnification by the Partnership as authorized in Section 5.8(a) has been met, and (ii) a written undertaking by or on behalf of the Indemnitee to repay the amount if it shall ultimately be determined that the standard of conduct has not been met. (d) The indemnification provided by this Section 5.8 shall be in addition to any other rights to which an Indemnitee or any other Person may be entitled under this 18 Agreement or any agreement, pursuant to any vote of the Partners, as a matter of law or otherwise, and shall continue as to an Indemnitee who has ceased to serve in such capacity unless otherwise provided in a written agreement pursuant to which such Indemnitee is indemnified. (e) The Partnership may, but shall not be obligated to, purchase and maintain insurance, on behalf of the Indemnitees and such other Persons as the Managing General Partner shall determine in its reasonable discretion, against any liability that may be asserted against or expenses that may be incurred by such Person in connection with the Partnership's activities, regardless of whether the Partnership would have the power to indemnify such Person against such liability under the provisions of this Agreement. (f) In no event may an Indemnitee subject any of the Partners to personal liability by reason of the indemnification provisions set forth in this Agreement. (g) An Indemnitee shall not be denied indemnification in whole or in part under this Section 5.8 solely because the Indemnitee had an interest in the transaction with respect to which the indemnification applies if the transaction was otherwise permitted by the terms of this Agreement. (h) The provisions of this Section 5.8 are for the benefit of the Indemnitees, their heirs, successors, assigns and administrators and shall not be deemed to create any rights for the benefit of any other Persons. Any amendment, modification or repeal of this Section 5.8 or any provision hereof shall be prospective only and shall not in any way affect the Partnership's liability to any Indemnitee under this Section 5.8, as in effect immediately prior to such amendment, modification, or repeal with respect to claims arising from or relating to matters occurring, in whole or in part, prior to such amendment, modification or repeal, regardless of when such claims may arise or be asserted. SECTION 5.9 Liability of the Managing General Partner. ----------------------------------------- (a) Notwithstanding anything to the contrary set forth in this Agreement, except as otherwise expressly provided in this Agreement, the Managing General Partner and its officers and directors shall not be liable for monetary damages to the Partnership, any Partners or any Assignees for losses sustained or liabilities incurred as a result of reasonable errors in judgment or of any act or omission if the Managing General Partner acted in good faith; provided, however, that the Managing General Partner shall be liable to the Partnership and Partners for its material breaches of this Agreement. (b) Subject to its obligations and duties as Managing General Partner set forth in Section 5.3 hereof, and subject to the limitations set forth in Section 5.4 hereof, the Managing General Partner may exercise any of the powers granted to it by this Agreement and perform any of the duties imposed upon it hereunder either directly or by or through its agents. The Managing General Partner shall not be responsible for any misconduct or negligence on the part 19 of any such agent appointed by the Managing General Partner in good faith, except as otherwise expressly provided herein. (c) Any amendment, modification or repeal of this Section 5.9 or any provision hereof shall be prospective only and shall not in any way affect the limitations on the Managing General Partner's liability (and that of its officers and directors) to the Partnership and the Non-Managing General Partners under this Section 5.9 as in effect immediately prior to such amendment, modification or repeal with respect to claims arising from or relating to matters occurring, in whole or in part, prior to such amendment, modification or repeal, regardless of when such claims may arise or be asserted. SECTION 5.10 Other Matters Concerning the Managing General Partner. ----------------------------------------------------- (a) The Managing General Partner may rely and shall be protected in acting, or refraining from acting, upon any resolution, certificate, statement, instrument, opinion, report, notice, request, consent, order, bond, debenture, or other paper or document believed by it in good faith to be genuine and to have been signed or presented by the proper party or parties. (b) The Managing General Partner may consult with legal counsel, accountants, appraisers, management consultants, investment bankers, architects, engineers, environmental consultants and other consultants and advisers selected by it, and any act taken or omitted to be taken in reliance upon the opinion of such Persons as to matters which such Managing General Partner reasonably believes to be within such Person's professional or expert competence shall be conclusively presumed to have been done or omitted in good faith and in accordance with such opinion. (c) The Managing General Partner shall have the right, in respect of any of its powers or obligations hereunder, to act through any of its duly authorized officers and duly appointed attorneys-in-fact. Each such attorney shall, to the extent provided by the Managing General Partner in the power of attorney, have full power and authority to do and perform all and every act and duty which is permitted or required to be done by the Managing General Partner hereunder. ARTICLE 6 - ACCOUNTING SECTION 6.1 Fiscal Year and Tax Accounting Method. ------------------------------------- The Partnership shall operate on the basis of a calendar year, and shall report its operations for tax and all other purposes in accordance with those methods the Managing General Partner and the Partnership's accountant deem advisable. 20 SECTION 6.2 Books, Records, and Tax Reports. ------------------------------- The Partnership shall maintain full and accurate books at its principal office which all Partners shall have the right to inspect and examine during business hours upon reasonable written notice to the Managing General Partner. The Managing General Partner shall keep or cause such books to be kept and shall fully and accurately enter all transactions of the Partnership therein. Such books shall be closed and balanced at the end of each calendar year. On or before March 31 of each year, the Managing General Partner will furnish the Non- Managing General Partners with a balance sheet and a statement of income and expenses of the Partners for the prior calendar year and a report on Treasury Form K-1 containing information relating to the Partnership to be used in preparing a Non-Managing General Partner's personal federal income tax return. SECTION 6.3 Accounting Practice. ------------------- The books of account of the Partnership shall be kept in accordance with good and accepted bookkeeping and accounting practices for similar properties, provided that all methods of accounting and of treating particular transactions shall be in accordance with the methods of accounting employed for Federal income tax purposes. The determinations of the Managing General Partner with respect to the treatment of any items or its allocation for federal, state or local tax purposes shall be binding upon all the Partners so long as such determination shall not be inconsistent with any express term hereof or of the Redemption Agreement. SECTION 6.4 Accountants. ----------- The Partnership's certified public accountant shall be designated by the Managing General Partner, subject to the terms and provisions of Section 5.3(h). SECTION 6.5 Bank Accounts. ------------- The Managing General Partner shall, on behalf of the Partnership, open and maintain a bank account or accounts in a bank or other financial institution of its choosing in which shall be deposited all of the capital, cash receipts and other funds of the Partnership. ARTICLE 7 - RIGHTS AND OBLIGATIONS OF THE NON-MANAGING GENERAL PARTNERS SECTION 7.1 Contributions by Non-Managing General Partners. ---------------------------------------------- Except as provided herein, the Non-Managing General Partners shall not be obligated to make a contribution of any sort whatsoever to the capital of the Partnership, or to provide a loan. 21 SECTION 7.2 Corporate Authority. ------------------- Each Partner hereby represents and covenants that its execution of this Agreement has been duly authorized by proper corporate action or otherwise. SECTION 7.3 Role of Non-Managing General Partners. ------------------------------------- Except as otherwise provided in this Agreement, no Non-Managing General Partner shall take part in, or interfere in any manner with, the conduct or control of the business of the Partnership, or shall have any right or authority to act for or bind the Partnership. SECTION 7.4 Rights and Obligations Under the Act. ------------------------------------ In addition to the foregoing rights (including any limitations thereof) and obligations, the Non-Managing General Partners shall each have those rights and obligations conferred or imposed upon partners of a general partnership under applicable law, to the extent not inconsistent with the terms hereof. SECTION 7.5 Redemption Rights. ----------------- Except as specifically provided in the Redemption Agreement, no Partner shall have the right to withdraw from the Partnership or have its interest in the Partnership redeemed by the Partnership. ARTICLE 8 - WITHDRAWAL AND REPLACEMENT OF PARTNERS AND TRANSFER OF PARTNERSHIP INTEREST SECTION 8.1 Non-Managing General Partners. ----------------------------- No Non-Managing General Partner's interest shall be sold, assigned, transferred, pledged or hypothecated or encumbered (any such transaction, a "Transfer"), in whole or in part, except in accordance with the terms and -------- conditions set forth in this Article 8. Any Transfer or purported Transfer of a Non-Managing General Partner's interest not made in accordance with this Article 8 shall be null and void. SECTION 8.2 Managing General Partner. ------------------------ The Managing General Partner may not Transfer its interest in the Partnership or withdraw from the Partnership without the consent of the Non- Managing General Partners. 22 SECTION 8.3 Transfer of Partnership Interests. --------------------------------- (a) Subject to the provisions of this Article 8, a Non-Managing General Partner may transfer its interest in the Partnership with the consent of the Managing General Partner, which consent may be withheld by the Managing General Partner in its sole and absolute discretion. Nothing in this Agreement shall be deemed to preclude the purchase by the Managing General Partner of any Non-Managing General Partnership interest and the admission of a Managing General Partner as a Non-Managing General Partner in connection therewith. (b) If the interest, or any part thereof, of a Partner in the Partnership is disposed of pursuant to this Section, such Partner shall nevertheless be entitled to a portion of the income, gain, loss, deduction and credit allocated to such interest or part thereof in accordance with the provisions of this agreement for the fiscal year of the Partnership in which such disposition occurs, based upon the number of months during such year that such Partner owned such interest or part thereof. Any predecessor or successor of such Partner in respect of such interest or part thereof shall share in such profits and losses for the fiscal year in which such disposition occurs and the Partnership shall be bound by such allocation, provided the same shall be deemed reasonable by the Partnership's accountants, upon being furnished with timely written notice of same. Distributions of cash or other property shall be made only to such persons who are Partners on the date of distribution. (c) Without limiting the foregoing, the Managing General Partner may prohibit any transfer by a Non-Managing General Partner of its interest in the Partnership if, in the opinion of legal counsel to the Partnership, such transfer would require filing of a registration statement under the Securities Act of 1933 or would otherwise violate any federal or state securities laws or regulations applicable to the Partnership or interests in the Partnership, or would cause a termination of the Partnership under Section 708 of the Code. (d) Without limiting the foregoing, no transfer by a Non-Managing General Partner of its interests in the Partnership may be made to any Person if (i) in the opinion of legal counsel for the Partnership, it would result in the Partnership being treated as an association taxable as a corporation; (ii) such transfer is effectuated through an "established securities market" or a "secondary market (or the substantial equivalent thereof)" within the meaning of Section 7704 of the Code; (iii) such transfer would cause the Partnership to become, with respect to any employee benefit plan subject to Title I of ERISA, a "party-in-interest" (as defined in Section 3(14) of ERISA) or a "disqualified person" (as defined in Section 4975(c) of the Code); (iv) such transfer would, in the opinion of legal counsel for the Partnership, cause any portion of the assets of the Partnership to constitute assets of any employee benefit plan pursuant to Department of Labor Regulations Section 2510.2-101; or (v) such transfer would subject the Partnership to be regulated under the Investment Company Act of 1940, the Investment Advisors Act of 1940 or the Employee Retirement Income Security Act of 1974, each as amended, or would violate any loan documents to which the Partnership is a party. 23 (e) The transfer of a Partnership interest shall not constitute, or result in, a dissolution of the Partnership. SECTION 8.4 Substituted Non-Managing General Partners. ----------------------------------------- (a) No Non-Managing General Partner shall have the right to substitute a transferee as a Non-Managing General Partner in his place. The Managing General Partner shall, however, have the right to consent to the admission of a transferee of the interest of a Non-Managing General Partner pursuant to this Section 8.4 as a Substituted Non-Managing General Partner, which consent may be given or withheld by the Managing General Partner in its sole and absolute discretion. The Managing General Partner's failure or refusal to permit a transferee of any such interests to become a Substituted Non- Managing General Partner shall not give rise to any cause of action against the Partnership or any Partner. (b) A transferee who has been admitted as a Substituted Non-Managing General Partner in accordance with this Article 8 shall have all the rights and powers and be subject to all the restrictions and liabilities of a Non-Managing General Partner under this Agreement. (c) Upon the admission of a Substituted Non-Managing General Partner, the Managing General Partner shall amend Schedule A to reflect the name, ---------- address, and Percentage Interest of such Substituted Non-Managing General Partner and to eliminate or adjust, if necessary, the name, address and interest of the predecessor of such Substituted Non-Managing General Partner. SECTION 8.5 Assignees. --------- If the Managing General Partner, in its sole and absolute discretion, does not consent to the admission of any permitted transferee as a Substituted Non- Managing General Partner, as described in Section 8.4, such transferee shall be considered an Assignee for purposes of this Agreement. An Assignee shall be deemed to have had assigned to it, and shall be entitled to receive distributions from the Partnership and the share of net income, net losses, and any other items, gain, loss deduction and credit of the Partnership attributable to the interest in the Partnership assigned to such transferee, but except as otherwise provided herein shall not be deemed to be a holder of an interest in the Partnership for any other purpose under this Agreement, and shall not be entitled to vote in any matter presented to the Non-Managing General Partners for a vote (such interest in the Partnership being deemed to have been voted on such matter in the same proportion as all other interests held by Non-Managing General Partners are voted). In the event any such transferee desires to make a further assignment of any such interest in the Partnership, such transferee shall be subject to all of the provisions of this Article 8 to the same extent and in the same manner as any Non-Managing General Partner desiring to make such an assignment. 24 ARTICLE 9 - DISSOLUTION, LIQUIDATION AND TERMINATION SECTION 9.1 Dissolution. ----------- (a) Except as herein otherwise expressly provided, the Partnership shall be dissolved upon the occurrence of any of the following events: (1) agreement by all of the Partners to dissolve the Partnership; (2) expiration of the term provided in Section 1.5 hereof; (3) sale or taking by eminent domain or other lawful government action resulting in transfer of title of substantially all of the Partnership's assets; or (4) any other event which, under applicable law, results in the dissolution of the Partnership. (b) Dissolution shall be effective on the date of the event giving rise to the dissolution, but the Partnership shall not terminate until the assets thereof have been distributed in accordance with the provisions of Section 9.2 hereof. SECTION 9.2 Liquidation. ----------- (a) If the Partnership shall be dissolved by reason of the occurrence of any of the circumstances described in Section 9.1, no further business shall be conducted by the Partnership except for taking of such action as shall be necessary for the winding up of its affairs and distribution of its assets to the Partners pursuant to the provisions of this Article 9. Upon such dissolution, the Managing General Partner shall act as liquidator or, if it is unable or unwilling to so act, it shall appoint one or more liquidators, who shall have full authority to wind up the affairs of the Partnership and to make final distribution as provided herein. Upon such dissolution of the Partnership, the liquidator(s) shall determine which, if any, Partnership properties and assets should be distributed in kind, and dispose of all other Partnership properties and assets at the best cash price obtainable therefor and distribute the proceeds as follows: (1) First, to the payment and discharge of all of the Partnership's debts and liabilities to creditors other than the Partners; (2) Second, to the payment and discharge of all of the Partnership's debts and liabilities to Partners in their capacities as creditors of the Partnership; (3) The balance, if any, to the Partners in accordance with the provisions of Article 4. 25 (b) Notwithstanding the foregoing, if any Partner shall be indebted to the Partnership, then, until payment of such indebtedness by said Partner, the liquidator(s) shall retain such Partner's distributive share of the Partnership properties and assets and, after applying the cost of operation of such properties and assets during the period of such liquidation against the income therefrom, the balance of such income shall be applied in liquidation of such indebtedness. However, if at the expiration of six (6) months after notice of such outstanding indebtedness has been given to such Partner and such amount has not been paid or otherwise liquidated in full, the liquidator(s) may sell the assets allocable to such Partner at public or private sale at the best price immediately obtainable, such best price to be determined in the sole judgement of the liquidator(s). So much of the proceeds of such sale as shall be necessary to liquidate such indebtedness shall then be so applied, and the balance of such proceeds, if any, shall be distributed to such Partner. Any gain or loss realized for Federal income tax purposes upon the disposition of such assets shall, to the extent permitted by law, be allocated to such Partner, and to the extent not so permitted, to the Partners. Thereafter, the liquidator(s) shall comply with all requirements of the Act, or other applicable law, pertaining to the winding up of a limited partnership, at which time the Partnership shall stand terminated. (c) In the event the Managing General Partner's interest in the Partnership is "liquidated" within the meaning of Regulations Section 1.704- 1(b)(2)(ii)(g) (including, without limitation, upon the liquidation of the Partnership) and the Managing General Partner's Capital Account has a deficit balance after giving effect to all contributions, distributions and allocations for all taxable years, including the year during which such liquidation occurs, the Managing General Partner shall contribute to the capital of the Partnership the amount necessary to restore such deficit balance to zero in compliance with Regulations Section 1.704-1(b)(2)(ii)(b)(3). ARTICLE 10 - MISCELLANEOUS SECTION 10.1 Redemption Agreement. -------------------- This Agreement and the Partners hereto are subject to the terms and provisions of the Redemption Agreement. If, and to the extent that, any terms or provisions of this Agreement are inconsistent with any terms and provisions of the Redemption Agreement, the terms and provisions of the Redemption Agreement shall govern and control. SECTION 10.2 Notice. ------ All notices, demands, consents, options, elections, or other communications hereunder shall be in writing and shall be deemed to have been exercised, made or given upon delivery if delivered by hand or by courier service and three (3) business days after being deposited in the United States mail and sent by certified or registered mail, return receipt requested, postage prepaid. Any notice required to be sent to any Partner shall be sent to the addresses specified on 26 Schedule A attached hereto and incorporated herein. Any party may designate an - ---------- alternative address on five (5) days' notice to the Partnership. SECTION 10.3 Further Assurances. ------------------ Each of the Partners will hereafter execute and deliver such further instruments, and do such further acts as may be required to carry out the intent and purposes of this Agreement. SECTION 10.4 Agreement in Counterparts. ------------------------- This Agreement may be executed in one or more counterparts and all such counterparts shall constitute one agreement binding on all the parties, notwithstanding that all the parties are not signatories to the original or the several counterparts. SECTION 10.5 Construction. ------------ None of the provisions of this Agreement shall be for the benefit or enforceable by the creditors of the Partnership. SECTION 10.6 Governing Law. ------------- This Agreement shall, except as herein otherwise expressly provided, be governed and construed in accordance with the laws of the State of California. SECTION 10.7 Amendments. ---------- This Agreement may be amended only by a written amendment signed by all of the Partners. SECTION 10.8 Pronouns. -------- Any pronouns and any variations thereof used herein shall be deemed to refer to the masculine, feminine, neuter, singular or plural, as the identity of the undersigned may require. SECTION 10.9 Successors in Interest. ---------------------- Except as otherwise provided herein, all provisions of this Agreement shall be binding upon, inure to the benefit of, and be enforceable by and against the respective heirs, executors, administrators, personal representatives, successors and permitted assigns of any of the parties to this Agreement. However, nothing in this Agreement, whether expressed or implied, is intended to confer upon any entity, other than specifically provided, any rights or benefits under or by reason of this Agreement. 27 SECTION 10.10 Headings. -------- The headings contained at the beginning of each Article and Section are for purposes of convenience only and are not intended to limit, expand or define the content thereof. SECTION 10.11 Consent to Jurisdiction and Service of Process. ---------------------------------------------- ALL JUDICIAL PROCEEDINGS BROUGHT AGAINST ANY PARTY HERETO ARISING OUT OF OR RELATING TO THIS AGREEMENT MAY BE BROUGHT IN ANY STATE OR FEDERAL COURT OF COMPETENT JURISDICTION IN THE STATE OF CALIFORNIA, AND BY EXECUTION AND DELIVERY OF THIS AGREEMENT EACH PARTY HERETO ACCEPTS FOR ITSELF, GENERALLY AND UNCONDITIONALLY, THE NONEXCLUSIVE JURISDICTION OF THE AFORESAID COURTS AND WAIVES ANY DEFENSE OF FORUM NON CONVENIENS AND IRREVOCABLY AGREES TO BE BOUND BY ANY JUDGMENT RENDERED THEREBY IN CONNECTION WITH THIS AGREEMENT. Each party hereby agrees that service of all process in any such proceeding in any such court may be made by registered or certified mail, return receipt requested, to any party hereto, at its address provided in this Agreement, such service being hereby acknowledged by each party to be sufficient for personal jurisdiction in any action against such party in any such court and to be otherwise effective and binding service in every respect. Nothing herein shall affect the right to serve process in any other manner permitted by law. SECTION 10.12 Waiver of Jury Trial. -------------------- EACH OF THE PARTIES TO THIS AGREEMENT HEREBY AGREES TO WAIVE ITS RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF ACTION BASED UPON OR ARISING OUT OF THIS AGREEMENT OR THE SUBJECT MATTER OF THIS AGREEMENT. The scope of this waiver is intended to be all-encompassing of any and all disputes that may be filed in any court and that relate to the subject matter of this Agreement, including, without limitation, contract claims, tort claims, beach of duty claims and all other common law and statutory claims. Each party hereto acknowledges that this waiver is a material inducement to enter into a business relationship, that each has already relied on this waiver in entering into this Agreement, and that each shall continue to rely on this waiver in their related future dealings. Each party hereto further warrants and represents that it has reviewed this waiver with its legal counsel and that it knowingly and voluntarily waives its jury trial rights following consultation with such legal counsel. THIS WAIVER IS IRREVOCABLE, MEANING THAT IT MAY NOT BE MODIFIED EITHER ORALLY OR IN WRITING, AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS OR MODIFICATIONS TO THIS AGREEMENT. In the event of litigation, this Agreement may be filed as a written consent to a trial by the court. 28 IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the day and year first above written. WITNESS: MANAGING GENERAL PARTNER: ------------------------ BOSTON PROPERTIES LLC By: Boston Properties Limited Partnership, Managing Member By: Boston Properties, Inc., General Partner /s/ Bradley A. Jacobson By: /s/ Thomas J. O'Connor - -------------------------- --------------------------------- Name: Thomas J. O'Connor Title: Vice President WITNESS: NON-MANAGING GENERAL PARTNERS: ----------------------------- BP EC2 HOLDINGS LLC By: Boston Properties Limited Partnership, Managing Member By: Boston Properties, Inc., General Partner /s/ Bradley A. Jacobson By: /s/ Thomas J. O'Connor - -------------------------- --------------------------------- Name: Thomas J. O'Connor Title: Vice President WITNESS: PIC REALTY CORPORATION /s/ Bradley A. Jacobson By: /s/ Gary L. Frazier - -------------------------- ------------------------------------------ Name: Gary L. Frazier Title: Vice President 29 SCHEDULE A ---------- ATTACHED TO AMENDED AND RESTATED PARTNERSHIP AGREEMENT OF EMBARCADERO CENTER ASSOCIATES Managing General Partner ------------------------ Name and Address Percentage Interest - ---------------- ------------------- Boston Properties LLC 0.4% c/o Boston Properties, Inc. 8 Arlington Street Boston, Massachusetts 02116 Non-Managing Partners --------------------- Name and Address Percentage Interest - ---------------- ------------------- BP EC2 Holdings LLC 39.6% c/o Boston Properties, Inc. 8 Arlington Street Boston, Massachusetts 02116 PIC Realty Corporation 60.0% c/o Prudential Realty Group 8 Campus Drive 4th Floor - Arbor Circle South Parsippany, New Jersey 07054 Attention: John R. Triece Facsimile: (201) 683-1797 with copies to: Prudential Insurance Company of America O'Melveny & Myers 4 Embarcadero Center, Suite 2700 Embarcadero Center West San Francisco, CA 94111 275 Battery Street Attention: Harry Mixon San Francisco, CA 94111 Facsimile: (415) 956-2197 Attention: Stephen A. Cowan Facsimile: (415) 984-8701 EXHIBIT A --------- Legal Description of Two Embarcadero Center ------------------------------------------- [INTENTIONALLY OMITTED] EXHIBIT B --------- Approved Terms and Conditions of Loans from Managing General Partner The Partnership shall be permitted to borrow funds from the Managing General Partner from time to time, as determined in the sole discretion of the Managing General Partner, for the purpose of funding working capital, leasing commissions, tenant improvements, capital expenditures and other expenditures relating to the Property. Each such borrowing shall be in the form of an unsecured loan and shall be evidenced by a note issued by the Partnership to the Managing General Partner in the form of Exhibit A attached to this Exhibit B. --------- --------- Exhibit A [FORM OF BP NOTE] - --------- DELAYED DEMAND NOTE ------------------- $____________________ San Francisco, California _____________, 19__ At any time after _________, 199_ [the date which is 120 days after the date of the Closing under the Master Transaction Agreement], FOR VALUE RECEIVED, EMBARCADERO CENTER ASSOCIATES, a California general partnership with a principal place of business in San Francisco, California (the "Maker"), promises to pay ----- [BOSTON PROPERTIES LIMITED PARTNERSHIP, a Delaware limited partnership] [other BPLLC affiliate] with a principal place of business in Boston, Massachusetts, ON DEMAND, the principal sum of _____________________ ($__________), with interest thereon at the rate of ten percent (10%) per annum. Interest shall be computed on the number of days principal is outstanding based on a 365 day year. All interest accruing under this Note shall be due and payable (i) monthly in arrears on the fifth (5th) day of each succeeding calendar month, commencing ________, 199_ [fifth day of calendar month following month in which note is made] and continuing thereafter until all amounts due hereunder have been paid in full, or (ii) at the option of the holder, on demand at any time after __________, 199_ [the date which is 120 days after the date of the Closing under the Master Transaction Agreement]. The outstanding balance of principal due hereunder may be prepaid in full at any time, or from time to time in part in multiples of One Thousand Dollars ($1,000.00) without any prepayment premium. The Maker agrees to pay all charges of the holder hereof in connection with the collection and enforcement of this Note, including reasonable attorneys' fees and disbursements. The Maker hereby waives presentment, demand, notice, protest and all other suretyship defenses generally and agrees that any renewal, extension or postponement of the time of payment or any other indulgence, may be effected without notice to and without releasing the Maker from any liability hereunder. This Note shall have the effect of an instrument under seal. EMBARCADERO CENTER ASSOCIATES By: Boston Properties LLC, its managing general partner By: Boston Properties Limited Partnership, its managing member By: Boston Properties, Inc., its general partner By:________________________ Name: Title: EXHIBIT C --------- DESCRIPTION OF EQUITY REDEMPTION LOAN ------------------------------------- The "Equity Redemption Loan" shall mean that certain loan to the Partnership in the aggregate principal amount of $95,927,000, which loan is made pursuant to a certain Term Loan Agreement dated as of November 12, 1998 by and among BankBoston, N.A., The Chase Manhattan Bank, Fleet National Bank, PNC Bank, National Association, Dresdner Bank AG New York Branch and Grand Cayman Branch, The Bank of New York, Key Bank National Association, Citizens Bank and other banks which may become parties thereto as the lenders thereunder, and One Embarcadero Center Venture, Embarcadero Center Associates, Three Embarcadero Center Venture and Four Embarcadero Center Venture, collectively as the borrowers thereunder, which Term Loan Agreement provides for loans to the borrowers in the aggregate principal amount of $328,143,000. The $95,927,000 loan to the Partnership under such Term Loan Agreement is evidenced by a promissory note of the Partnership in the form provided in such Term Loan Agreement. EXHIBIT D --------- DESCRIPTION OF PRUDENTIAL GUARANTIED LOAN ----------------------------------------- The "Prudential Guarantied Loan" shall mean that certain loan to the Partnership in the aggregate principal amount of $16,000,000, which loan is made pursuant to a certain Term Loan Agreement dated as of November 12, 1998 by and among The Chase Manhattan Bank as lender thereunder, and One Embarcadero Center Venture, Embarcadero Center Associates, Three Embarcadero Center Venture and Four Embarcadero Center Venture, collectively as the borrowers thereunder, which Term Loan Agreement provides for loans to the borrowers in the aggregate principal amount of $92,000,000. The $16,000,000 loan to the Partnership under such Term Loan Agreement is evidenced by a promissory note of the Partnership in the form provided in such Term Loan Agreement. EXHIBIT E --------- Description of Business Interruption and General Liability Insurance Business Interruption Insurance $145,000,000 Commercial General Liability $ 2,000,000 Umbrella Liability Program $200,000,000
EXHIBIT F --------- Description of Financing Plan for Embarcadero Center Associates 1. Equity Redemption Loan. Upon the execution of this Agreement, the ---------------------- Partnership will enter into a 90 day Term Loan Agreement with BankBoston, N.A., on behalf of itself and as agent for the several banks that are parties thereto, to borrow approximately $95,927,000 with a term of 90 days, which borrowing shall be guaranteed by Boston Properties Limited Partnership ("BPLP"). This ---- loan constitutes the Equity Redemption Loan. Interest on the outstanding indebtedness under the Equity Redemption Loan shall accrue at a rate equal to the 30 day Eurodollar rate plus 50 basis points. In addition, upon the closing of the Equity Redemption Loan, the Partnership will pay its proportionate share of the closing fee in the approximate aggregate amount of $116,000. The Partnership shall pledge the Investment Notes to secure obligations of the Partnership under the Equity Redemption Loan. 2. Prudential Guarantied Loan. Upon the execution of this Agreement, the -------------------------- Partnership will also enter into a Term Loan Agreement with The Chase Manhattan Bank, N.A. to borrow approximately $16,000,000 with a term of 90 days, which borrowing shall be guaranteed by The Prudential Insurance Company of America. This loan constitutes the Prudential Guarantied Loan. Interest on the outstanding indebtedness under the Prudential Guarantied Loan shall accrue at a rate equal to the 30 day Eurodollar rate plus 30 basis points. In addition, upon the closing of the Prudential Guarantied Loan, the Partnership will pay its proportionate share of the closing fee in the approximate aggregate amount of $40,000. 3. Advance Under BPLP Line of Credit. Upon the execution of this --------------------------------- Agreement, BPLP will amend its existing Amended and Restated Revolving Credit Agreement (the "Credit Agreement") with BankBoston, N.A., and certain other ---------------- banks for which BankBoston, N.A. serves as agent, to add, inter alia, the Partnership as a Borrower under the Credit Agreement for the purpose of the advance described in the next paragraph. The Equity Redemption Loan will, upon the earlier of the redemption of PIC Realty Corporation from the Partnership or the 90th day after the date of execution of this Agreement, be repaid through (i) a draw on the Credit Agreement by the Partnership of approximately $19,700,000 and (ii) cash of the Partnership in an amount equal to approximately $76,300,000, which cash will represent proceeds from the repayment of the Special BP Loan. As a result of the draw under the Credit Agreement, the Partnership will be a primary obligor with respect to approximately $19,700,000 of indebtedness under the Credit Agreement. 4. Assumption and Release with respect to Prudential Guarantied Loan. ----------------------------------------------------------------- The Prudential Guarantied Loan will, upon the redemption of the interest of PIC Realty Corporation in the Partnership, be assumed by PIC Realty Corporation and the Partnership will be released as a borrower with respect to the Prudential Guarantied Loan and all other obligations with respect thereto, as contemplated by, and subject to the terms and conditions of, the Redemption Agreement. In the event that the interest of PIC Realty Corporation in the Partnership is not redeemed by February 10, 1999, or in the event that the Partnership is not, by such date, released in full from all obligations with respect to the Prudential Guarantied Loan and related obligations, then either (i) Prudential shall continue to guaranty the Prudential Guarantied Loan until such redemption, assumption and release occurs or (ii) if the Partnership repays and refinances the Prudential Guarantied Loan by obtaining any replacement debt ("Replacement Debt"), Prudential shall guarantee the lenders thereof of the punctual payment in full and all other obligations of such Replacement Debt. 5. Secured Financing. Upon the execution of this Agreement, the ----------------- Partnership, as a co-borrower, will enter into a certain first deed of trust loan in the aggregate principal amount of $320 million with New York Life Insurance Company, The Equitable Life Assurance Society of the United States and Teachers Assurance and Annuity Association of America. As among the co- borrowers, the Partnership will be the primary obligor on $160 million.

 
                                                                    EXHIBIT 99.9



                          SECOND AMENDED AND RESTATED
                             PARTNERSHIP AGREEMENT

                                      OF

                       THREE EMBARCADERO CENTER VENTURE

 
                               TABLE OF CONTENTS

Page ---- ARTICLE 1 - THE PARTNERSHIP.................................................................................... 3 SECTION 1.1 Continuation of the Partnership....................................................... 3 SECTION 1.2 Partnership Name...................................................................... 3 SECTION 1.3 Place of Business..................................................................... 3 SECTION 1.4 General Partnership................................................................... 3 SECTION 1.5 Term of Partnership................................................................... 3 SECTION 1.6 Purposes of the Partnership........................................................... 3 SECTION 1.7 Definitions........................................................................... 4 ARTICLE 2 - CAPITALIZATION..................................................................................... 8 SECTION 2.1 Partners' Percentage Interests........................................................ 8 SECTION 2.2 Additional Capital Contributions; Limitations on Future Capital Contributions; Obligation of Managing Partner to Purchase BP Notes.......................................... 8 SECTION 2.3 Admission of Additional Partners...................................................... 8 SECTION 2.4 Return of Capital Accounts and Redemption of Partnership Interests.................... 9 SECTION 2.5 Investment Loan, Equity Redemption Loan, Prudential Guarantied Loan, Existing Loans and Replacement Loans.................................................................. 9 ARTICLE 3 - ALLOCATIONS OF PROFITS AND LOSSES.................................................................. 10 SECTION 3.1 Capital Accounts and Allocations of Profit and Loss................................... 10 ARTICLE 4 - DISTRIBUTIONS...................................................................................... 12 SECTION 4.1 Distributions......................................................................... 12 SECTION 4.2 Amounts Withheld...................................................................... 12 ARTICLE 5 - MANAGEMENT OF THE PARTNERSHIP...................................................................... 12 SECTION 5.1 Management............................................................................ 12 SECTION 5.2 Rights to Delegate and Employ......................................................... 13 SECTION 5.3 Enumeration of Specific Rights and Powers............................................. 13 SECTION 5.4 Limitations on Managing General Partner's Authority................................... 15 SECTION 5.5 Filing of Returns and Other Writings.................................................. 16 SECTION 5.6 Other Permissible Activities.......................................................... 16 SECTION 5.7 Contracts with Affiliates; Borrowing from Partners.................................... 17 SECTION 5.8 Indemnification....................................................................... 17 SECTION 5.9 Liability of the Managing General Partner............................................. 19 SECTION 5.10 Other Matters Concerning the Managing General Partner................................. 20 ARTICLE 6 - ACCOUNTING......................................................................................... 20 SECTION 6.1 Fiscal Year and Tax Accounting Method................................................. 20
(i)
Page ---- SECTION 6.2 Books, Records, and Tax Reports.................................................... 21 SECTION 6.3 Accounting Practice................................................................ 21 SECTION 6.4 Accountants........................................................................ 21 SECTION 6.5 Bank Accounts...................................................................... 21 ARTICLE 7 - RIGHTS AND OBLIGATIONS OF THE NON-MANAGING..................................................... 21 SECTION 7.1 Contributions by Non-Managing General Partners..................................... 21 SECTION 7.2 Corporate Authority................................................................ 21 SECTION 7.3 Role of Non-Managing General Partners.............................................. 22 SECTION 7.4 Rights and Obligations Under the Act............................................... 22 SECTION 7.5 Redemption Rights.................................................................. 22 ARTICLE 8 - WITHDRAWAL AND REPLACEMENT OF PARTNERS AND...................................................... 22 SECTION 8.1 Non-Managing General Partners...................................................... 22 SECTION 8.2 Managing General Partner........................................................... 22 SECTION 8.3 Transfer of Partnership Interests.................................................. 22 SECTION 8.4 Substituted Non-Managing General Partners.......................................... 24 SECTION 8.5 Assignees.......................................................................... 24 ARTICLE 9 - DISSOLUTION, LIQUIDATION AND TERMINATION........................................................ 25 SECTION 9.1 Dissolution........................................................................ 25 SECTION 9.2 Liquidation........................................................................ 25 ARTICLE 10 - MISCELLANEOUS.................................................................................. 26 SECTION 10.1 Redemption Agreement............................................................... 26 SECTION 10.2 Notice............................................................................. 26 SECTION 10.3 Further Assurances................................................................. 27 SECTION 10.4 Agreement in Counterparts.......................................................... 27 SECTION 10.5 Construction....................................................................... 27 SECTION 10.6 Governing Law...................................................................... 27 SECTION 10.7 Amendments......................................................................... 27 SECTION 10.8 Pronouns........................................................................... 27 SECTION 10.9 Successors in Interest............................................................. 27 SECTION 10.10 Headings........................................................................... 28 SECTION 10.11 Consent to Jurisdiction and Service of Process..................................... 28 SECTION 10.12 Waiver of Jury Trial............................................................... 28
(ii) SCHEDULES AND EXHIBITS Schedule A Partners and Percentage Interests Exhibit A Legal Description of Property Exhibit B Approved Terms and Conditions of Loans from Managing General Partner Exhibit C Description of Equity Redemption Loan Exhibit D Description of Prudential Guarantied Loan Exhibit E Description of Business Interruption and General Liability Insurance Exhibit F Description of Financing Plan for the Partnership Exhibit G Form of Special BP Loan Note (iii) SECOND AMENDED AND RESTATED PARTNERSHIP AGREEMENT OF THREE EMBARCADERO CENTER VENTURE This SECOND AMENDED AND RESTATED PARTNERSHIP AGREEMENT OF THREE EMBARCADERO CENTER VENTURE (this "Agreement") is entered into and shall be effective as of --------- the 12th day of November, 1998, by and between Boston Properties LLC, a Delaware limited liability company, having a mailing address c/o Boston Properties, Inc., 8 Arlington Street, Boston, Massachusetts 02116, as managing general partner ("BPLLC" or the "Managing General Partner"), BP EC3 Holdings LLC, a Delaware ----- ------------------------ limited liability company, having a mailing address c/o Boston Properties, Inc., 8 Arlington Street, Boston, Massachusetts 02116, as non-managing general partner ("Holdings LLC"), and The Prudential Insurance Company of America, a New Jersey ------------ corporation, having a mailing address c/o Prudential Realty Group, 8 Campus Drive, 4th Floor - Arbor Circle South, Parsippany, New Jersey 07054 ("Prudential"), as non-managing general partner. Holdings LLC and Prudential ---------- are sometimes hereinafter referred to as the "Non-Managing General Partners" and ----------------------------- each as a "Non-Managing General Partner." The Managing General Partner and the ---------------------------- Non-Managing General Partners are sometimes hereinafter referred to as the "Partners." -------- RECITALS: A. THREE EMBARCADERO CENTER VENTURE (the "Partnership") is a California ----------- general partnership formed pursuant to and governed by that certain Agreement of Partnership dated as of January 1, 1979, creating a general partnership named Three Embarcadero Center Venture, and as subsequently amended on December 29, 1986, December 31, 1986, January 1, 1992 and September 28, 1998 (as revised to such date, the "Prior Partnership Agreement"). --------------------------- B. The Partnership owns and has in operation that certain parcel of real property situated in the City and County of San Francisco, California, and more particularly described on Exhibit A hereto, upon which is erected an office --------- building, related improvements and personal property owned by the Partnership and situated thereon or therein, known generally as Three Embarcadero Center (the "Real Property"). ------------- C. On September 30, 1998, the interest of Fedmark Corporation, a Delaware corporation ("Fedmark"), in the Partnership was redeemed for cash. Following ------- such redemption, all of the outstanding partnership interests in the Partnership were held by Prudential, with a 50.025263% partnership interest, and Embarcadero Center Investors Partnership, a California limited partnership ("ECIP"), with a ---- 49.974737% partnership interest. D. Pursuant to that certain Master Transaction Agreement, dated September 28, 1998 (the "Master Transaction Agreement"), by and among (i) Prudential, PIC ---------------------------- Realty Corporation, a Delaware corporation ("PIC"), Fedmark, ECIP, Pacific Property Services, L.P., a California limited partnership, and the other persons identified therein on Exhibit A-1 thereto, on the one hand, and (ii) Boston ----------- Properties Limited Partnership, a Delaware limited partnership (the "Operating --------- Partnership"), and Boston Properties, Inc., a Delaware corporation ("Public - ----------- ------ Company") on the other hand, the Operating Partnership acquired the right, - ------- subject to the satisfaction of various conditions, to have all of the partners of ECIP contribute to the Operating Partnership all of their interests in ECIP. On November 12, 1998, following the redemption of Fedmark as a partner of the Partnership as described in the preceding paragraph, the closing of the transactions contemplated by the Master Transaction Agreement occurred, and the Operating Partnership directed the partners of ECIP to convey their interests in ECIP to BP EC1 Holding LLC, a Delaware limited liability company ("Holdings 1 LLC") and the partners of ECIP did so convey their interests in ECIP to Holdings 1 LLC (which conveyance constituted a contribution to the Operating Partnership). Upon such conveyance, by operation of law ECIP dissolved and Holdings 1 LLC succeeded to ECIP's 49.974737% partnership interest in the Partnership. Prior to the amendment and restatement of this Agreement, Holdings 1 LLC conveyed to BPLLC a 0.499747% partnership interest in the Partnership and conveyed to Holdings LLC a 49.474990% partnership interest in the Partnership. As a result of the foregoing, (i) ECIP and Fedmark (the "Withdrawing Partners") -------------------- have ceased to be partners of the Partnership, (ii) BPLLC and Holdings LLC have been admitted as partners of the Partnership, and (iii) as of the date hereof BPLLC, Prudential and Holdings LLC are the sole partners of the Partnership with percentage interests of 0.499747%, 50.025263% and 49.474990%, respectively. E. To reflect the transfers, successions, admissions and withdrawals recited above, to provide for the continuation of the Partnership as a California general partnership under the Act, and to provide for the revised terms and conditions under which the Partnership will continue in existence and be governed, the parties wish to amend and restate the Prior Partnership Agreement in its entirety, as provided herein. NOW, THEREFORE, in consideration of the foregoing, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows: I. Transfer of Partnership Interests. Pursuant to the transactions --------------------------------- described in the Recitals above, the Withdrawing Partners have ceased to be partners in the Partnership, BPLLC has been admitted as the Managing General Partner of the Partnership with a 0.499747% Percentage Interest and Holdings LLC has been admitted as a Non-Managing General Partner of the Partnership with a 49.474990% Percentage Interest. Prudential shall continue as a Non-Managing General Partner of the Partnership with a 50.025263% Percentage Interest. II. Amendment and Restatement. The Original Partnership Agreement is ------------------------- hereby amended and restated in its entirety as follows: 2 ARTICLE 1 - THE PARTNERSHIP SECTION 1.1 Continuation of the Partnership. ------------------------------- The Partners hereby agree to continue the Partnership as a general partnership under and pursuant to the Uniform Partnership Act of the State of California (the "Act") as the same is now or hereafter amended. The Partners --- shall promptly execute, and the Managing General Partner shall promptly cause to be filed with the proper offices, any certificate or amendments thereto required by the Act or any other applicable partnership act, fictitious name act, or similar statute in effect, or for any reasonable purpose. SECTION 1.2 Partnership Name. ---------------- The name of the Partnership shall continue to be "THREE EMBARCADERO CENTER VENTURE." All business of the Partnership shall be conducted under such name or under such variations thereof as the Managing General Partner deems necessary or appropriate to comply with the requirements of law in any applicable jurisdiction in which the Partnership may do business. SECTION 1.3 Place of Business. ----------------- The principal place of business of the Partnership shall be c/o Boston Properties, Inc., Four Embarcadero Center, Suite 2600, San Francisco, California 94111, or at such other place or places as the Managing General Partner may designate. SECTION 1.4 General Partnership. ------------------- The Partnership shall be a general partnership, governed by the Act. The interests of the Partners in the Partnership shall be personal property for all purposes. All real and other property owned by the Partnership shall be deemed owned by the Partnership, as a partnership, and no Partner, individually, shall have any ownership of such property. SECTION 1.5 Term of Partnership. ------------------- The term of the Partnership shall continue until 12:00 noon on December 31, 2050, unless sooner terminated in accordance with the terms and conditions of this Agreement, or by applicable law. SECTION 1.6 Purposes of the Partnership. --------------------------- The purpose of the Partnership shall be: 3 (a) to own, manage, develop, improve, renovate, rehabilitate, operate, hold for investment, lease, encumber, mortgage, pledge, assign, exchange, sell and/or otherwise deal with the Property; (b) to retain managing agents and consultants therefor, and to do all things necessary or useful in connection with any of the foregoing; (c) in addition to, and in furtherance of these purposes and powers, the Partnership shall have the power (i) to borrow money and issue evidences of indebtedness and to secure same by mortgage, pledge or other lien (including, without limitation, obtaining the Equity Redemption Loan and Prudential Guarantied Loan), and (ii) to guarantee the obligations of any other Person when done in furtherance of the Partnership's business, including any indebtedness of such Person, and to secure such guarantee obligations by mortgage, pledge or other lien on any asset of the Partnership; (d) to make and service the Investment Loan as contemplated herein; (e) subject to the express terms, provisions and restrictions of this Agreement, to engage in and consummate the transactions described in the Master Transaction Agreement; (f) to enter into the Redemption Agreement and consummate the transactions described therein; and (g) to enter into, perform and carry out contracts of any kind necessary to, or in connection with, or incidental to the accomplishment of any of the foregoing purposes; and (h) to use the Excess Mortgage Loan Proceeds to make the Special BP Loan. The Partnership shall not engage in any other business. It is further agreed that the Partnership shall at all times adhere to at least the level of quality in the maintenance and operation of the Property as a first class office and retail complex as maintained by the Partnership during the twelve (12) month period preceding the date hereof. SECTION 1.7 Definitions. ----------- In addition to the capitalized terms defined in the recitals and elsewhere herein, the following terms shall have the following meanings: "Act" has the meaning set forth in Section 1.1 hereof. --- 4 "Affiliate" means, with respect to any Person, any Person directly or --------- indirectly controlling, controlled by or under common control with such Person. For purposes of this definition, "control," when used with respect to any Person, means the power to direct the management and policies of such Person, directly or indirectly, whether through the ownership of voting securities, by contract or otherwise, and the terms "controlling" and "controlled" have meanings correlative to the foregoing. No officer, director or equity owner of the Managing General Partner shall be considered an Affiliate of the Managing General Partner solely as a result of serving in such capacity or being an equity owner of the Managing General Partner. "Approved Loan Costs" shall mean all fees, costs and expenses incurred by ------------------- the Partnership or any Partner in connection with the Equity Redemption Loan or Prudential Guarantied Loan that are expressly approved by each of the Partners (which approval shall not be unreasonably withheld, conditioned or delayed), including, without limitation, (i) all fees and expenses of the lender(s) thereof subject to reimbursement by the Partnership or any Partner, and (ii) all of the reasonable legal fees and expenses incurred directly by such Persons (or any of their constituent owners) in connection with the Equity Redemption Loan and the Prudential Guarantied Loan. "Borrowing Costs" of a loan shall mean the cost of procuring and repaying --------------- such loan expressed as an "all-in" effective annual interest rate per annum to be determined taking into account all costs of procuring and repaying such loan including, without limitation, all (i) periodic interest and other amounts due and payable in connection with such loan, (ii) all loan points and fees paid with respect to such loan, (iii) all fees and expenses of the lender(s) thereof that are subject to payment or reimbursement by the borrower in connection therewith, and (iv) all legal fees and expenses incurred by the borrower in connection therewith; provided that, all points, fees, costs and expenses will -------- ---- be amortized on a straight-line basis over the term of the loan. "BP Note" means a note, in the form and for a purpose described in Exhibit ------- ------- B hereto, given by the Partnership to the Managing General Partner or any of its - - Affiliates. "BP Partners" means Boston Properties LLC, the Managing General Partner, ----------- and BP EC3 Holdings LLC, a Non-Managing General Partner. "Capital Contributions" means, with respect to any Partner, the amount of --------------------- money and the initial fair market value of any property (other than money) contributed to the Partnership with respect to the interest in the Partnership held by such Person less the amount of liabilities to which such property is subject and which the Partnership is considered to assume pursuant to the provisions of Section 752 of the Code (as defined below). "Code" means the Internal Revenue Code of 1986, as amended from time to ---- time (or any corresponding provisions of succeeding law). 5 "Equity Redemption Loan" shall mean a loan to the Partnership governed by ---------------------- the term loan agreement particularly described on Exhibit C attached hereto, a --------- true, correct and complete copy of which has been delivered to each of the Partners prior to the date hereof. "Equity Redemption Loan" shall also include any extension or modification of the Equity Redemption Loan and any new loan obtained by the Partnership to replace or refinance the Equity Redemption Loan; provided that, any such extension, modification or new loan shall be in - -------- ---- compliance with the terms and provisions of this Agreement and the Redemption Agreement. "Excess Mortgage Loan Proceeds" shall mean the excess proceeds of any new ----------------------------- mortgage loan borrowing secured by the Real Property over and above the amounts of such proceeds used to (i) repay any existing mortgage debt secured by the Real Property prior to the date hereof, (ii) pay any prepayment penalty, premium or fee in connection with any such existing mortgage loan that is repaid, and (iii) pay the transaction costs incurred by the Partnership in connection with such borrowing or the prepayment of any existing mortgage loan. "Indemnitee" means (i) any Person made a party to a claim or proceeding by ---------- reason of (A) his or its status as a Partner, or as a director or officer of the Partnership or a Partner, or (B) his or its liabilities, pursuant to a loan guarantee or otherwise, for any indebtedness of the Partnership (including, without limitation, any indebtedness which the Partnership has assumed or taken assets subject to); and (ii) such other Persons (including Affiliates of a Partner or the Partnership) as the Managing General Partner may reasonably designate from time to time (whether before or after the event giving rise to potential liability), for a purpose related to Partnership business. "Interest Rate Approved Loan Costs" has the meaning given thereto in --------------------------------- Section 2.5(e)(i). "Investment Loan" shall mean a loan made by the Partnership to the --------------- Investment Loan Borrower in an amount equal to $76,897,000 pursuant to (and in accordance with the terms and provisions of) that certain Note Purchase Agreement of even date herewith, by and between the Partnership and Investment Loan Borrower. "Investment Loan Borrower" shall mean Prudential Realty Securities, Inc., a ------------------------ Delaware corporation. "Investment Notes" means the promissory notes of the Investment Loan ---------------- Borrower acquired by the Partnership in connection with the Investment Loan. "Managing General Partner" means Boston Properties LLC, a Delaware limited ------------------------ liability company, and any other Person who may become a Managing General Partner pursuant to the terms of this Agreement, in either case until such Person has ceased to be a Managing General Partner pursuant to the terms of this Agreement. "Non-Managing General Partner" means BP EC3 Holdings LLC, a Delaware ---------------------------- limited liability company, and The Prudential Insurance Company of America, a New Jersey 6 corporation, and any other Person who may become a Non-Managing General Partner pursuant to the terms of this Agreement, in each such case until such Person has ceased to be a Non-Managing General Partner pursuant to the terms of this Agreement. "Non-Managing General Partners" means all such Persons, if there is more than one. If at any time there is more than one Non-Managing General Partner, then all references herein to the Non-Managing General Partner shall, unless the context requires otherwise, be deemed to refer to the Non-Managing General Partners. "Partnership" means the partnership governed by this Agreement and any ----------- partnership continuing the business of the Partnership in the event of dissolution as herein provided. "Percentage Interest" means, with respect to any Partner, the Percentage ------------------- Interest set forth opposite such Partner's name on Schedule A. In the event any ---------- Partner's interest in the Partnership is transferred in accordance with the provisions of this Agreement, the transferee of such interest shall succeed to the Percentage Interest of his transferor to the extent it relates to the transferred interest. "Person" means any individual, partnership, corporation, trust, or other ------ entity. "Property" shall mean the Real Property, including all real property, -------- improvements, leases, licenses, fixtures and tangible and intangible personal property (including, without limitation, cash, deposit accounts, money and other sums and Investment Notes so long as the Partnership holds the same) owned by the Partnership from time to time. "Prudential Guarantied Loan" shall mean a loan to the Partnership governed -------------------------- by the term loan agreement particularly described on Exhibit D attached hereto, --------- a true, correct and complete copy of which has been delivered to each of the Partners prior to the date hereof. "Redemption Agreement" shall mean that certain Redemption Agreement of even -------------------- date herewith, by and among the Partnership and each of the Partners. "Redemption Distribution" means the distribution to Prudential, in full ----------------------- redemption of its interest in the Partnership, of all or a portion of the Investment Notes and, if applicable, cash, as determined in accordance with the Redemption Agreement. "Regulations" means the Income Tax Regulations promulgated under the Code, ----------- as such regulations may be amended from time to time (including corresponding provisions of succeeding regulations). "Special BP Loan" shall mean a loan in the principal amount equal to the --------------- Excess Mortgage Loan Proceeds and at an interest rate per annum equal to twelve (12) basis points above the Borrowing Costs of the Excess Mortgage Loan Proceeds, made by the Partnership to any BP Partner, or any Affiliate of any BP Partner and evidenced by a promissory note in the form of Exhibit G attached --------- hereto. 7 "Transfer" means, as a noun, any voluntary or involuntary transfer, sale, -------- pledge, hypothecation, or other disposition and, as a verb, voluntarily or involuntarily to transfer, sell, pledge, hypothecate, or otherwise dispose of. ARTICLE 2 - CAPITALIZATION SECTION 2.1 Partners' Percentage Interests. ------------------------------ The names and Percentage Interests of the Partners are set forth on Schedule A hereto. - ---------- SECTION 2.2 Additional Capital Contributions; Limitations on Future ------------------------------------------------------- Capital Contributions; Obligation of Managing Partner to -------------------------------------------------------- Purchase BP Notes. ----------------- (a) No Partner shall, except as otherwise required by the Act, other applicable law or this Agreement, be required to make any further Capital Contributions to the Partnership, and so long as Prudential or any Affiliate of Prudential is a Partner, no Capital Contributions shall be made to the Partnership without the prior written consent of Prudential. (b) At no time prior to the second anniversary of the Redemption Distribution shall the Managing General Partner call or accept Capital Contributions from any Partner for the purpose of repaying the Equity Redemption Loan or any debt replacing or refinancing the Equity Redemption Loan, and during such period no Capital Contributions made after the date hereof shall be used in such manner. (c) To the extent that it is necessary or desirable for the Partnership, in the sole discretion of the Managing General Partner, to raise cash for the purpose of funding working capital, capital expenditures, leasing commissions, tenant improvements or other expenditures relating to the Property at a time when the Partnership is unable to raise such cash through the receipt of Capital Contributions because of the prohibition set forth in Section 2.2(a), the Managing General Partner agrees that it (or an Affiliate of the Managing General Partner) will lend funds to the Partnership for such purposes by purchasing BP Notes from the Partnership. SECTION 2.3 Admission of Additional Partners. -------------------------------- The Managing General Partner shall have the right, from time to time, provided it obtains the consent of the Non-Managing General Partners, to admit additional Non-Managing General Partners to the Partnership. Upon the admission of any new Non-Managing General Partner, an amendment of this Agreement, reflecting such change, shall be signed by the Managing General Partner and the additional Non-Managing General Partner, and an amendment to the Certificate, reflecting such change, to the extent required or appropriate under applicable law, shall be signed by all Partners 8 either individually or by the Managing General Partner on their behalf and filed with the Secretary of State of the State of California. SECTION 2.4 Return of Capital Accounts and Redemption of Partnership -------------------------------------------------------- Interests. --------- Except as otherwise provided in this Agreement or as set forth in the Redemption Agreement, (i) no Partner shall have the right to demand and withdraw a return of its Capital Account, and (ii) no Partner shall have the right to receive property other than cash upon a distribution to the Partners, redemption of any Partner's interest or liquidation of the Partnership. No Partner shall receive any interest, salary, or drawing with respect to its Capital Contributions or its Capital Account or for services rendered on behalf of the Partnership or otherwise in its capacity as Partner, except (i) interest received, if any, on BP Notes or (ii) as otherwise provided in this Agreement. SECTION 2.5 Investment Loan, Equity Redemption Loan, Prudential --------------------------------------------------- Guarantied Loan, Existing Loans and Replacement Loans. ----------------------------------------------------- (a) The Partnership is hereby authorized to, and shall, make the Investment Loan to Investment Loan Borrower and acquire the Investment Notes on the date hereof. (b) The Partnership is hereby authorized to, and shall, borrow the Equity Redemption Loan and Prudential Guarantied Loan on the date hereof and shall thereafter perform its obligations in respect thereof subject to the terms and limitations of this Agreement. The proceeds of the Equity Redemption Loan and Prudential Guarantied Loan shall be applied to make the Investment Loan and acquire the Investment Notes on the date hereof. (c) In accordance with Section 2.2(b), the Partnership shall not, at any time prior to the second anniversary of the Redemption Date, use Capital Contributions made after the date hereof for the purpose of repaying the Equity Redemption Loan or any debt replacing the Equity Redemption Loan. (d) Except as otherwise expressly provided in this Agreement, all costs, fees, penalties and expenses incurred in connection with the satisfaction of any debt of the Partnership on the date hereof shall be paid by Prudential, on the one hand, and the BP Partners, on the other hand, in accordance with the terms and provisions of Exhibit V to the Master Transaction Agreement. All --------- Borrowing Costs of the Excess Mortgage Loan Proceeds ("Excess Proceeds Borrowing ------------------------- Costs") shall be paid by the Partnership and capitalized and amortized over the - ----- term of the loan from which the Excess Mortgage Loan Proceeds were derived. All other Borrowing Costs incurred in connection with any Partnership borrowing (other than those described hereinabove and in subsection (e) below) shall be -------------- paid by the BP Partners. (e) Notwithstanding anything to the contrary provided in this Agreement, all costs, fees and expenses incurred in connection with the consummation of the Equity 9 Redemption Loan and Prudential Guarantied Loan shall be paid by the Partnership and borne by the Partners (and reflected in the Partnership's books as follows): (i) Any and all Approved Loan Costs paid in order to reduce or lock the interest rate for the Equity Redemption Loan or Prudential Guarantied Loan (including, without limitation, interest rate lock fees and loan points charged to obtain a reduced, fixed or more favorable rate (collectively, "Interest Rate Approved Loan Costs")) shall be paid by the --------------------------------- Partnership and capitalized and amortized over the term of the appropriate loan; (ii) All other Approved Loan Costs shall be paid by the Partnership as current expenses and borne by each Partner in accordance with its Percentage Interest on the date hereof; (iii) Any other costs and expenses incurred by the Partnership with respect to the Equity Redemption Loan shall be paid by the BP Partners; and (iv) Any other costs and expenses incurred by the Partnership with respect to the Prudential Guarantied Loan shall be paid by Prudential. ARTICLE 3 - ALLOCATIONS OF PROFITS AND LOSSES AND MAINTENANCE OF CAPITAL ACCOUNTS SECTION 3.1 Capital Accounts and Allocations of Profit and Loss. --------------------------------------------------- (a) Capital Accounts. A separate capital account (a "Capital ---------------- ------- Account") shall be maintained for each Partner in accordance with Section 1.704- 1(b)(2)(iv) of the Regulations, and this Section 3.1 shall be interpreted and applied in a manner consistent with such section of the Regulations. The Partnership may, at the election of the Managing General Partner, adjust the Capital Accounts of its Partners to reflect revaluations of the Partnership property whenever the adjustment would be permitted under Regulations Section 1.704-1(b)(2)(iv)(f). In the event that the Capital Accounts of the Partners are so adjusted, (i) the Capital Accounts of the Partners shall be adjusted in accordance with Regulations Section 1.704-1(b)(2)(iv)(g) for allocations of depreciation, depletion, amortization and gain or loss, as computed for book purposes, with respect to such property, and (ii) the Partners' distributive shares of depreciation, depletion, amortization and gain or loss, as computed for tax purposes, with respect to such property shall be determined so as to take account of the variation between the adjusted tax basis and book value of such property in the same manner as under Section 704(c) of the Code. In the event that Code Section 704(c) applies to partnership property, the Capital Accounts of the Partners shall be adjusted in accordance with Regulations Section 1.704-1(b)(2)(iv)(g) for allocations of depreciation, depletion, amortization and gain and loss, as computed for book purposes, with respect to such property. The Partners' distributive shares of depreciation, depletion, amortization and gain or loss, as computed for tax purposes, with respect to such property shall 10 be determined so as to take account of the variation between the adjusted tax basis and book value of such property in the same manner as under Code Section 704(c), and the amount of upward and/or downward adjustments to the book value of the Partnership property shall be treated as income, gain, deduction and/or loss for purposes of applying the allocation provisions of this Article 3. In the event that Code Section 704(c) applies to Partnership property, the Capital Accounts of the Partners shall be adjusted in accordance with Regulations Section 1.704-1(b)(2)(iv)(g) for allocations of depreciation, depletion, amortization and gain and loss, as computed for book purposes, with respect to such property. The amount of all distributions to Partners shall be determined pursuant to Section 4.1 hereof. Notwithstanding any provision contained herein to the contrary, no Partner shall be required to restore any negative balance in its Capital Account. (b) Allocation of Profit and Loss. Generally, all profits and losses ----------------------------- will be allocated in accordance with the Percentage Interests of the Partners. It is the intention of the Partners that all items of Partnership income, gain, loss, and deduction, as determined for book purposes, shall be allocated among the Partners, and shall be credited or debited to their respective Capital Accounts in accordance with Regulations Section 1.704(b)(2)(iv), so as to ensure to the maximum extent possible (i) that such allocations satisfy the economic effect equivalence test of Regulations Section 1.704(b)(2)(ii)(i), by allocating items that can have economic effect in such a manner that the balance of each Partner's Capital Account at the end of any taxable year (increased by such Partner's "share of Partnership minimum gain and Partner minimum gain", as defined in Regulations Section 1.704-2) would be positive in the amount of cash that such Partner would receive (or would be negative in the amount of cash that such Partner would be required to contribute to the Partnership) if the Partnership sold all of its property for an amount of cash equal to the book value (as determined pursuant to Regulations Section 1.704-1(b)(2)(iv)) of such property (reduced, but not below zero, by the amount of nonrecourse debt to which such property is subject) and all of the cash of the Partnership remaining after payment of all liabilities (other than nonrecourse liabilities) of the Partnership were distributed in liquidation immediately following the end of such taxable year pursuant to Article 9, and (ii) that all allocations of items that cannot have economic effect (including credits and nonrecourse deductions) are allocated to the Partners in accordance with the Partners' interests in the Partnership, which, unless otherwise required by Code Section 704(b) and the Regulations promulgated thereunder, shall be their Percentage Interests for the taxable year. (c) Section 704(c) Items. Except to the extent otherwise required by -------------------- the Code, Regulations Section 1.704-3 shall apply to all tax allocations governed by Code Section 704(c) and all "reverse section 704(c) allocations". The Managing General Partner shall determine the method of allocation to be used pursuant to Regulations Section 1.704-3 and shall make all elections under such section; provided, however, that with respect to the "reverse Section 704(c) -------- ------- allocations," caused by the transfers contemplated by the Master Transaction Agreement, the Partnership will use the "traditional method without curative allocations." (d) The tax returns for the Partnership for the 1998 calendar year shall be prepared using the interim closing of the books method. 11 ARTICLE 4 - DISTRIBUTIONS SECTION 4.1 Distributions. ------------- (a) Except as provided in Section 4.1(b) or Section 7.5, and subject to the needs of the Partnership to accumulate reserves, which prior to the Redemption Distribution shall be determined in the sole discretion of the Managing General Partner, distributions to the Partners shall be made in proportion to the Partners' Percentage Interests. Distributions shall be made from time to time at the discretion of the Managing General Partner. (b) Notwithstanding anything to the contrary provided in this Agreement, all payments in respect of title insurance received by the Partnership the amount of which was affected by the non-imputation endorsement to the Partnership's title insurance policy issued as of the date hereof with respect to the Property will be distributed only to the BP Partners in proportion to their respective Percentage Interests. SECTION 4.2 Amounts Withheld. ---------------- All amounts withheld pursuant to the Code or any provision of any state or local tax law with respect to any payment or distribution to the Partnership, the Managing General Partner or the Non-Managing General Partners shall be treated as amounts distributed to the Managing General Partner or Non-Managing General Partners pursuant to this Article for all purposes under this Agreement. The Managing General Partner may allocate any such amounts among the Partners in any manner that is in accordance with applicable law. ARTICLE 5 - MANAGEMENT OF THE PARTNERSHIP SECTION 5.1 Management. ---------- The management powers over the business and affairs of the Partnership are and shall be exclusively vested in the Managing General Partner, who shall be subject to the provisions of this Agreement and to applicable law, and, subject to the consent rights set forth in Section 5.4 hereof, no Non-Managing General Partner shall have any right to participate in or exercise control or management power over the business and affairs of the Partnership. 12 SECTION 5.2 Rights to Delegate and Employ. ----------------------------- The Managing General Partner shall devote such time and effort to the Partnership as it deems necessary and may retain agents as reasonably required or desirable to assist it. The Managing General Partner shall review the status and condition of the Property and shall supervise the activities of any agents engaged by it. The Managing General Partner may delegate any of its powers, rights and obligations hereunder, and, in furtherance of any such delegation, may appoint, employ, contract or otherwise deal with any Person (including Affiliates, but only so long as such employment, contract or other deal is not less favorable to the Partnership than would be an arms-length transaction on market terms) for the transaction of the business of the Partnership, which Persons may, under the supervision of the Managing General Partner, perform any acts or services for the Partnership as the Managing General Partner may approve. SECTION 5.3 Enumeration of Specific Rights and Powers. ----------------------------------------- Subject to Section 5.4, the Managing General Partner shall have all the rights and powers which may be possessed by a general partner in a partnership formed under the Act, which are otherwise conferred by law or which are necessary, advisable or convenient to the discharge of duties under this Agreement and to the management, direction and control of the business and affairs of the Partnership, exercisable without the consent of the Non-Managing General Partners (except as herein expressly provided), including the following rights and powers: (a) to conduct the tax, financial and business affairs of the Partnership; (b) to take all action necessary to acquire, purchase, renovate, rehabilitate, hold, own, improve, operate, encumber, mortgage, pledge, assign, exchange, or to sign notes or guarantee payment of any loans relating to the purposes of the Partnership; (c) to manage, repair, insure, service, promote, advertise, lease, sublease, and create or release interests in the Partnership property; (d) to timely pay out of Partnership funds such expenses as are necessary to carry out the intentions and purposes of the Partnership including real estate taxes and debt service payments to the extent there is sufficient gross cash proceeds. (e) to sell and/or otherwise dispose of all or any portion of the Property; (f) to make appropriate elections permitted under any applicable tax law, provided that such elections will not, in the opinion of counsel or the accountants for the Partnership, be disadvantageous to a majority in interest of the Non-Managing General Partners; (g) to change the principal office of the Partnership to other places subject to the notice provision herein provided; 13 (h) to employ agents, attorneys, public accountants (which shall be, in all events, a "Big Five" accounting firm), and depositories and to grant powers of attorney; (i) to employ persons necessary and appropriate in the operation and management of the Partnership and the Property, including, but not limited to, supervisory managing agents, insurance brokers, real estate brokers, and loan brokers, on such terms and for such compensation which does not exceed generally prevailing market rates, all to act under the supervision of the Managing General Partner, and the Managing General Partner on behalf of the Partnership is hereby authorized to enter into an agreement with any Managing General Partner in their individual capacities or a corporation or other entity affiliated with any Managing General Partner for the performance of such services to the Partnership except as otherwise provided for in this Agreement; (j) to enter into any contract of insurance which the Managing General Partner deems necessary and proper for the protection of the Partnership, the conservation of the Property or any other asset of the Partnership, or for a purpose convenient or beneficial to the Partnership, including but not limited to, a contract naming the Managing General Partner as additional insured, and to continue in force any policies required by any mortgage, lease or other agreement relating to the Property or any part thereof; provided that, so long -------- ---- as Prudential or any Affiliate of Prudential is a Partner, (i) the Partnership shall maintain reasonable and customary insurance with respect to the Property with amounts and types of coverage that are at least comparable to that maintained by Affiliates of the BP Partners with respect to other properties owned by such Affiliates (after giving effect to differences in the value and nature of such properties) and (ii) the Partnership shall maintain business interruption and commercial general liability insurance in at least the amounts set forth on Exhibit E hereto; --------- (k) to pay, collect, compromise, arbitrate, resort to legal action or otherwise make or defend claims or demands of or against the Partnership; provided that, so long as Prudential, or an Affiliate of Prudential, is a - -------- ---- Partner, neither the Managing General Partner nor the Partnership shall compromise or settle any claim or demand of, or against, the Partnership without Prudential's, or its Affiliate's, consent, which consent will not be unreasonably withheld; (l) to borrow money and issue evidences of indebtedness in furtherance of any and all purposes of the Partnership, including borrowings from Partners of the Partnership, as contemplated by Section 5.7 hereof or otherwise, and including borrowings made in accordance with the financing plan for the Partnership described in Exhibit F hereto; to guarantee the obligations of any --------- other Person (but only when such guaranty is made in furtherance of the business of the Partnership), including the indebtedness of such Person; and to secure any or all of the above by mortgage, pledge, guaranty or other lien on the Property and/or any other asset of the Partnership; and (m) to lend money to any BP Partner or any Affiliate of any BP Partner pursuant to a Special BP Loan. 14 SECTION 5.4 Limitations on Managing General Partner's Authority. --------------------------------------------------- (a) Notwithstanding anything in this Agreement to the contrary, for so long as Prudential is a Partner, the Managing General Partner shall not have the power or authority to, and shall not, cause the Partnership to take any of the following actions, without the consent of Prudential, which consent shall not be unreasonably withheld: (i) other than in the ordinary course of business, cause any closing of a material portion of the Property for renovations (other than repairs necessitated as a result of a fire or other casualty); (ii) cause or permit the engagement by the Partnership in any business other than as contemplated under Section 1.6; ----------- (iii) take any action or make any decision involving credit, management or servicing decisions relating to the Investment Notes other than making an election to accelerate the Investment Notes upon the occurrence of (and during the continuance of) an Event of Default or taking any action or decision relating to the Redemption Distribution; (iv) make a loan to or guarantee the indebtedness of any Person other than (A) loans to tenants of the Property for tenant improvements or (B) a Special BP Loan; (v) cause or permit the sale of (A) all or any material portion of the Property, except leases, concessionaire agreements and space licenses entered into in the ordinary course of business of the Property, or (B) except in connection with the Redemption Distribution, the Investment Notes or any portion thereof or interest therein; (vi) cause the Partnership to (A) obtain any borrowing, (B) issue evidences of indebtedness, or (C) guaranty the obligations of any Person, if such borrowing, issuance or guaranty provides for recourse to Prudential (other than the Prudential Guarantied Loan or the Equity Redemption Loan or any Replacement Debt (as defined in Exhibit F); (vii) amend this Agreement if such amendment affects or could affect (A) the receipt, amount or timing of any distributions to Prudential, or (B) Prudential's rights or obligations under this Agreement or the Redemption Agreement; (viii) cause the dissolution of the Partnership, or cause the Partnership to file or otherwise commence a voluntary bankruptcy case, or consent to the commencement of an involuntary bankruptcy case, under the United States Code or under any other applicable bankruptcy, insolvency or similar law now or hereafter in effect, or consent to the entry of an order for relief in an involuntary case, or consent to the 15 appointment of or taking possession by a receiver, trustee or other custodian for all or a substantial part of the Property; (ix) borrow money from the Managing General Partner or any Affiliate of the Managing General Partner except as permitted or required under Sections 2.2(c) and 5.7 or otherwise in this Agreement; ----------------------- (x) assign, relinquish, settle, compromise, waive or impair any of the Partnership's rights under or with respect to, or amend, terminate, extend the term of (or time for payments due, or performance to be rendered, to the Partnership under) or otherwise modify any instrument or agreement under which the Partnership has rights and to which the Managing General Partner or any of its Related Parties is a party; or (xi) engage in any activity without a good faith business purpose therefor and with the intent of manipulating the "Operating Profits" or "Operating Losses" of the Partnership described in the Redemption Agreement in a manner intended to materially adversely affect, to the benefit of the other Partners, the amounts that Prudential would be entitled to receive under this Agreement or the Redemption Agreement. SECTION 5.5 Filing of Returns and Other Writings. ------------------------------------ The Managing General Partner shall be the Tax Matters Partner and is also specifically authorized to and shall cause the preparation and timely filing of all Partnership tax returns and shall, on behalf of the Partnership, subject to the terms and provisions of the Redemption Agreement, make such tax elections for the Partnership as it, after consultation with the Partnership's accountants, shall determine to be in the best interests of the Partners. In addition, the Managing General Partner shall timely file all other forms, documents or other writings with respect to the business and operation of the Partnership which shall be required by any governmental agency or authority having jurisdiction to require such forms, documents or other writings, and shall transmit to each Partner any form or document required to be transmitted by any such governmental agency. SECTION 5.6 Other Permissible Activities. ---------------------------- Nothing herein contained shall be deemed to prevent any Partner or any shareholder or affiliate thereof from engaging in other activities for profit, whether in the real estate business or otherwise. The Managing General Partner (or any shareholder or affiliate thereof), or any Partner, may, in the future, organize and manage joint ventures, additional limited partnerships or other business entities for the acquisition, management and sale of real estate. Neither this Agreement nor any activity undertaken pursuant hereto shall prevent any Partner or any affiliate from engaging in such activities, or require any Partner to permit the Partnership or any Partner to participate in any such activities and, as a material part of the consideration for each Partner's 16 execution hereof, each Partner, for the benefit of the other Partners, hereby waives, relinquishes and renounces any such right or claim of participation. SECTION 5.7 Contracts with Affiliates; Borrowing from Partners. -------------------------------------------------- The Managing General Partner is authorized to enter into agreements on behalf of the Partnership with other persons or entities affiliated with the Partnership and the Partners, including with respect to the borrowing of money from, and issuance of evidences of indebtedness to, Partners of the Partnership in furtherance of any and all purposes of the Partnership, including borrowing from the Managing General Partner or any of its Affiliates for the purposes and on the terms set forth on Exhibit B attached hereto and incorporated herein by --------- reference; provided, however, that all such agreements (other than the giving of -------- ------- BP Notes and the making of the Special BP Loans) shall be disclosed to the other Partners and shall not be less favorable to the Partnership than had such agreement been negotiated at arms-length and on market terms. Notwithstanding any other provision of this Agreement, it is acknowledged and agreed that an Affiliate of the Managing General Partner shall enter into a management agreement with the Partnership for a management fee that does not exceed the management fee that was payable to Pacific Property Services, L.P. (the previous management company that managed the Property) as of May 1, 1998. SECTION 5.8 Indemnification. --------------- (a) To the fullest extent permitted by California law, the Partnership shall indemnify each Indemnitee from and against any and all losses, claims, damages, liabilities, joint or several, expenses (including, without limitation, attorneys fees and other legal fees and expenses), judgments, fines, settlements, and other amounts arising from any and all claims, demands, actions, suits or proceedings, civil, criminal, administrative or investigative, that relate to the operations of the Partnership as set forth in this Agreement, in which such Indemnitee may be involved, or is threatened to be involved, as a party or otherwise, unless it is established that: (i) the act or omission of the Indemnitee was material to the matter giving rise to the proceeding and either was committed in bad faith, was the result of active and deliberate dishonesty, or was the result of a breach of this Agreement by such Indemnitee (or by the Partner of which such Indemnitee is a director or officer); or (ii) the Indemnitee actually received an improper personal benefit in money, property or services, or in the case of any criminal proceeding, the Indemnitee had reasonable cause to believe that the act or omission was unlawful. Without limitation, the foregoing indemnity shall extend to any liability of any Indemnitee, pursuant to a loan guaranty (except a guaranty by a Partner of nonrecourse indebtedness of the Partnership or as otherwise provided in any such loan guaranty) or otherwise for any indebtedness of the Partnership, and the Managing General Partner is hereby authorized and empowered, on behalf of the Partnership, to enter into one or more indemnity agreements consistent with the provisions of this Section 5.8 in favor of any Indemnitee having or potentially having liability for any such indebtedness. The termination of any proceeding by conviction of an Indemnitee or upon a plea of nolo contendere or its equivalent by an Indemnitee, or an entry of an order of probation against an Indemnitee prior to judgment, creates a rebuttable presumption that such Indemnitee acted in a manner 17 contrary to that specified in this Section 5.8(a). Any indemnification pursuant to this Section 5.8 shall be made only out of the assets of the Partnership and shall not impose any personal liability on any Partner, and neither the Managing General Partner nor any Non-Managing General Partner shall have any obligation to contribute to the capital of the Partnership, or otherwise provide funds, to enable the Partnership to fund its obligations under this Section 5.8. (b) If the Managing General Partner avails itself of the indemnification provisions set forth herein, the Managing General Partner shall promptly notify in writing the other Partners of such fact and shall provide a brief description of the nature and magnitude of the indemnification claimed. An Indemnitee, other than the Managing General Partner, may assert a claim for indemnification hereunder by giving written notice thereof to the Managing General Partner. If indemnification is sought for a claim or liability asserted by a third party, the Indemnitee shall also give written notice thereof to the Managing General Partner promptly after it receives notice of the claim or liability being asserted. Such notice shall summarize the bases for the claim for indemnification and any claim or liability being asserted by a third party. The Managing General Partner, on behalf of the Partnership, shall be entitled to direct the defense against a third party claim or liability with counsel selected by it (subject to the consent of the Indemnitee, which consent shall not be unreasonably withheld) as long as the Partnership is conducting a good faith and diligent defense. The Indemnitee shall, at all times, have the right to fully participate in the defense of a third party claim or liability at its own expense, directly or through counsel; provided, however, that if the named -------- ------- parties to the action or proceeding include both the Partnership and the Indemnitee, and the Indemnitee is advised by counsel that representation of both parties by the same counsel would be inappropriate under applicable standards of professional conduct, the Indemnitee may engage separate counsel, whose reasonable fees and expenses shall be borne by the Partnership. If no notice of intent to dispute and defend a third party claim or liability is given by the Managing General Partner within 20 business days of receiving notice of such claim or liability, the Indemnitee shall have the right, at the expense of the Partnership, to undertake the defense of such claim or liability (with counsel selected by the Indemnitee), and to compromise or settle it, exercising reasonable business judgment. If the third party claim or liability is one that, by its nature, cannot be defended solely by the Partnership, then the Indemnitee shall make available such information and assistance as the Managing General Partner may reasonably request and shall cooperate with the Partnership in such defense, at the expense of the Partnership. (c) Subject to the procedures set forth in Section 5.8(b), reasonable expenses incurred by an Indemnitee who is a party to a proceeding in a matter for which the Indemnitee has undertaken the defense pursuant to the provisions of this Section 5.8 (other than as a result of the rejection or dispute by the Managing General Partner of a claim for indemnification under Section 5.8(b)) shall be paid or reimbursed by the Partnership in advance of the final disposition of the proceeding upon receipt by the Partnership of (i) a written affirmation by the Indemnitee of the Indemnitee's good faith belief that the standard of conduct necessary for indemnification by the Partnership as authorized in Section 5.8(a) has been met, and (ii) a written undertaking by or on behalf of the Indemnitee to repay the amount if it shall ultimately be determined that the standard of conduct has not been met. 18 (d) The indemnification provided by this Section 5.8 shall be in addition to any other rights to which an Indemnitee or any other Person may be entitled under this Agreement or any agreement, pursuant to any vote of the Partners, as a matter of law or otherwise, and shall continue as to an Indemnitee who has ceased to serve in such capacity unless otherwise provided in a written agreement pursuant to which such Indemnitee is indemnified. (e) The Partnership may, but shall not be obligated to, purchase and maintain insurance, on behalf of the Indemnitees and such other Persons as the Managing General Partner shall determine in its reasonable discretion, against any liability that may be asserted against or expenses that may be incurred by such Person in connection with the Partnership's activities, regardless of whether the Partnership would have the power to indemnify such Person against such liability under the provisions of this Agreement. (f) In no event may an Indemnitee subject any of the Partners to personal liability by reason of the indemnification provisions set forth in this Agreement. (g) An Indemnitee shall not be denied indemnification in whole or in part under this Section 5.8 solely because the Indemnitee had an interest in the transaction with respect to which the indemnification applies if the transaction was otherwise permitted by the terms of this Agreement. (h) The provisions of this Section 5.8 are for the benefit of the Indemnitees, their heirs, successors, assigns and administrators and shall not be deemed to create any rights for the benefit of any other Persons. Any amendment, modification or repeal of this Section 5.8 or any provision hereof shall be prospective only and shall not in any way affect the Partnership's liability to any Indemnitee under this Section 5.8, as in effect immediately prior to such amendment, modification, or repeal with respect to claims arising from or relating to matters occurring, in whole or in part, prior to such amendment, modification or repeal, regardless of when such claims may arise or be asserted. SECTION 5.9 Liability of the Managing General Partner. ----------------------------------------- (a) Notwithstanding anything to the contrary set forth in this Agreement, except as otherwise expressly provided in this Agreement, the Managing General Partner and its officers and directors shall not be liable for monetary damages to the Partnership, any Partners or any Assignees for losses sustained or liabilities incurred as a result of reasonable errors in judgment or of any act or omission if the Managing General Partner acted in good faith; provided, however, that the Managing General Partner shall be liable to the Partnership and Partners for its material breaches of this Agreement. (b) Subject to its obligations and duties as Managing General Partner set forth in Section 5.3 hereof, and subject to the limitations set forth in Section 5.4 hereof, the Managing General Partner may exercise any of the powers granted to it by this Agreement and perform any of the duties imposed upon it hereunder either directly or by or through its agents. The 19 Managing General Partner shall not be responsible for any misconduct or negligence on the part of any such agent appointed by the Managing General Partner in good faith, except as otherwise expressly provided herein. (c) Any amendment, modification or repeal of this Section 5.9 or any provision hereof shall be prospective only and shall not in any way affect the limitations on the Managing General Partner's liability (and that of its officers and directors) to the Partnership and the Non-Managing General Partners under this Section 5.9 as in effect immediately prior to such amendment, modification or repeal with respect to claims arising from or relating to matters occurring, in whole or in part, prior to such amendment, modification or repeal, regardless of when such claims may arise or be asserted. SECTION 5.10 Other Matters Concerning the Managing General Partner. ----------------------------------------------------- (a) The Managing General Partner may rely and shall be protected in acting, or refraining from acting, upon any resolution, certificate, statement, instrument, opinion, report, notice, request, consent, order, bond, debenture, or other paper or document believed by it in good faith to be genuine and to have been signed or presented by the proper party or parties. (b) The Managing General Partner may consult with legal counsel, accountants, appraisers, management consultants, investment bankers, architects, engineers, environmental consultants and other consultants and advisers selected by it, and any act taken or omitted to be taken in reliance upon the opinion of such Persons as to matters which such Managing General Partner reasonably believes to be within such Person's professional or expert competence shall be conclusively presumed to have been done or omitted in good faith and in accordance with such opinion. (c) The Managing General Partner shall have the right, in respect of any of its powers or obligations hereunder, to act through any of its duly authorized officers and duly appointed attorneys-in-fact. Each such attorney shall, to the extent provided by the Managing General Partner in the power of attorney, have full power and authority to do and perform all and every act and duty which is permitted or required to be done by the Managing General Partner hereunder. ARTICLE 6 - ACCOUNTING SECTION 6.1 Fiscal Year and Tax Accounting Method. ------------------------------------- The Partnership shall operate on the basis of a calendar year, and shall report its operations for tax and all other purposes in accordance with those methods the Managing General Partner and the Partnership's accountant deem advisable. 20 SECTION 6.2 Books, Records, and Tax Reports. ------------------------------- The Partnership shall maintain full and accurate books at its principal office which all Partners shall have the right to inspect and examine during business hours upon reasonable written notice to the Managing General Partner. The Managing General Partner shall keep or cause such books to be kept and shall fully and accurately enter all transactions of the Partnership therein. Such books shall be closed and balanced at the end of each calendar year. On or before March 31 of each year, the Managing General Partner will furnish the Non- Managing General Partners with a balance sheet and a statement of income and expenses of the Partners for the prior calendar year and a report on Treasury Form K-1 containing information relating to the Partnership to be used in preparing a Non-Managing General Partner's personal federal income tax return. SECTION 6.3 Accounting Practice. ------------------- The books of account of the Partnership shall be kept in accordance with good and accepted bookkeeping and accounting practices for similar properties, provided that all methods of accounting and of treating particular transactions shall be in accordance with the methods of accounting employed for Federal income tax purposes. The determinations of the Managing General Partner with respect to the treatment of any items or its allocation for federal, state or local tax purposes shall be binding upon all the Partners so long as such determination shall not be inconsistent with any express term hereof or of the Redemption Agreement. SECTION 6.4 Accountants. ----------- The Partnership's certified public accountant shall be designated by the Managing General Partner, subject to the terms and provisions of Section 5.3(h). SECTION 6.5 Bank Accounts. ------------- The Managing General Partner shall, on behalf of the Partnership, open and maintain a bank account or accounts in a bank or other financial institution of its choosing in which shall be deposited all of the capital, cash receipts and other funds of the Partnership. ARTICLE 7 - RIGHTS AND OBLIGATIONS OF THE NON-MANAGING GENERAL PARTNERS SECTION 7.1 Contributions by Non-Managing General Partners. ---------------------------------------------- Except as provided herein, the Non-Managing General Partners shall not be obligated to make a contribution of any sort whatsoever to the capital of the Partnership, or to provide a loan. SECTION 7.2 Corporate Authority. ------------------- 21 Each Partner hereby represents and covenants that its execution of this Agreement has been duly authorized by proper corporate action or otherwise. SECTION 7.3 Role of Non-Managing General Partners. ------------------------------------- Except as otherwise provided in this Agreement, no Non-Managing General Partner shall take part in, or interfere in any manner with, the conduct or control of the business of the Partnership, or shall have any right or authority to act for or bind the Partnership. SECTION 7.4 Rights and Obligations Under the Act. ------------------------------------ In addition to the foregoing rights (including any limitations thereof) and obligations, the Non-Managing General Partners shall each have those rights and obligations conferred or imposed upon partners of a general partnership under applicable law, to the extent not inconsistent with the terms hereof. SECTION 7.5 Redemption Rights. ----------------- Except as specifically provided in the Redemption Agreement, no Partner shall have the right to withdraw from the Partnership or have its interest in the Partnership redeemed by the Partnership. ARTICLE 8 - WITHDRAWAL AND REPLACEMENT OF PARTNERS AND TRANSFER OF PARTNERSHIP INTEREST SECTION 8.1 Non-Managing General Partners. ----------------------------- No Non-Managing General Partner's interest shall be sold, assigned, transferred, pledged or hypothecated or encumbered (any such transaction, a "Transfer"), in whole or in part, except in accordance with the terms and - --------- conditions set forth in this Article 8. Any Transfer or purported Transfer of a Non-Managing General Partner's interest not made in accordance with this Article 8 shall be null and void. SECTION 8.2 Managing General Partner. ------------------------ The Managing General Partner may not Transfer its interest in the Partnership or withdraw from the Partnership without the consent of the Non- Managing General Partners. SECTION 8.3 Transfer of Partnership Interests. --------------------------------- (a) Subject to the provisions of this Article 8, a Non-Managing General Partner may transfer its interest in the Partnership with the consent of the Managing General Partner, which consent may be withheld by the Managing General Partner in its sole and absolute 22 discretion. Nothing in this Agreement shall be deemed to preclude the purchase by the Managing General Partner of any Non-Managing General Partnership interest and the admission of a Managing General Partner as a Non-Managing General Partner in connection therewith. (b) If the interest, or any part thereof, of a Partner in the Partnership is disposed of pursuant to this Section, such Partner shall nevertheless be entitled to a portion of the income, gain, loss, deduction and credit allocated to such interest or part thereof in accordance with the provisions of this agreement for the fiscal year of the Partnership in which such disposition occurs, based upon the number of months during such year that such Partner owned such interest or part thereof. Any predecessor or successor of such Partner in respect of such interest or part thereof shall share in such profits and losses for the fiscal year in which such disposition occurs and the Partnership shall be bound by such allocation, provided the same shall be deemed reasonable by the Partnership's accountants, upon being furnished with timely written notice of same. Distributions of cash or other property shall be made only to such persons who are Partners on the date of distribution. (c) Without limiting the foregoing, the Managing General Partner may prohibit any transfer by a Non-Managing General Partner of its interest in the Partnership if, in the opinion of legal counsel to the Partnership, such transfer would require filing of a registration statement under the Securities Act of 1933 or would otherwise violate any federal or state securities laws or regulations applicable to the Partnership or interests in the Partnership, or would cause a termination of the Partnership under Section 708 of the Code. (d) Without limiting the foregoing, no transfer by a Non-Managing General Partner of its interests in the Partnership may be made to any Person if (i) in the opinion of legal counsel for the Partnership, it would result in the Partnership being treated as an association taxable as a corporation; (ii) such transfer is effectuated through an "established securities market" or a "secondary market (or the substantial equivalent thereof)" within the meaning of Section 7704 of the Code; (iii) such transfer would cause the Partnership to become, with respect to any employee benefit plan subject to Title I of ERISA, a "party-in-interest" (as defined in Section 3(14) of ERISA) or a "disqualified person" (as defined in Section 4975(c) of the Code); (iv) such transfer would, in the opinion of legal counsel for the Partnership, cause any portion of the assets of the Partnership to constitute assets of any employee benefit plan pursuant to Department of Labor Regulations Section 2510.2-101; or (v) such transfer would subject the Partnership to be regulated under the Investment Company Act of 1940, the Investment Advisors Act of 1940 or the Employee Retirement Income Security Act of 1974, each as amended, or would violate any loan documents to which the Partnership is a party. (e) The transfer of a Partnership interest shall not constitute, or result in, a dissolution of the Partnership. 23 SECTION 8.4 Substituted Non-Managing General Partners. ----------------------------------------- (a) No Non-Managing General Partner shall have the right to substitute a transferee as a Non-Managing General Partner in his place. The Managing General Partner shall, however, have the right to consent to the admission of a transferee of the interest of a Non-Managing General Partner pursuant to this Section 8.4 as a Substituted Non-Managing General Partner, which consent may be given or withheld by the Managing General Partner in its sole and absolute discretion. The Managing General Partner's failure or refusal to permit a transferee of any such interests to become a Substituted Non-Managing General Partner shall not give rise to any cause of action against the Partnership or any Partner. (b) A transferee who has been admitted as a Substituted Non-Managing General Partner in accordance with this Article 8 shall have all the rights and powers and be subject to all the restrictions and liabilities of a Non-Managing General Partner under this Agreement. (c) Upon the admission of a Substituted Non-Managing General Partner, the Managing General Partner shall amend Schedule A to reflect the name, ---------- address, and Percentage Interest of such Substituted Non-Managing General Partner and to eliminate or adjust, if necessary, the name, address and interest of the predecessor of such Substituted Non-Managing General Partner. SECTION 8.5 Assignees. --------- If the Managing General Partner, in its sole and absolute discretion, does not consent to the admission of any permitted transferee as a Substituted Non- Managing General Partner, as described in Section 8.4, such transferee shall be considered an Assignee for purposes of this Agreement. An Assignee shall be deemed to have had assigned to it, and shall be entitled to receive distributions from the Partnership and the share of net income, net losses, and any other items, gain, loss deduction and credit of the Partnership attributable to the interest in the Partnership assigned to such transferee, but except as otherwise provided herein shall not be deemed to be a holder of an interest in the Partnership for any other purpose under this Agreement, and shall not be entitled to vote in any matter presented to the Non-Managing General Partners for a vote (such interest in the Partnership being deemed to have been voted on such matter in the same proportion as all other interests held by Non-Managing General Partners are voted). In the event any such transferee desires to make a further assignment of any such interest in the Partnership, such transferee shall be subject to all of the provisions of this Article 8 to the same extent and in the same manner as any Non-Managing General Partner desiring to make such an assignment. 24 ARTICLE 9 - DISSOLUTION, LIQUIDATION AND TERMINATION SECTION 9.1 Dissolution. ----------- (a) Except as herein otherwise expressly provided, the Partnership shall be dissolved upon the occurrence of any of the following events: (1) agreement by all of the Partners to dissolve the Partnership; (2) expiration of the term provided in Section 1.5 hereof; (3) sale or taking by eminent domain or other lawful government action resulting in transfer of title of substantially all of the Partnership's assets; or (4) any other event which, under applicable law, results in the dissolution of the Partnership. (b) Dissolution shall be effective on the date of the event giving rise to the dissolution, but the Partnership shall not terminate until the assets thereof have been distributed in accordance with the provisions of Section 9.2 hereof. SECTION 9.2 Liquidation. ----------- (a) If the Partnership shall be dissolved by reason of the occurrence of any of the circumstances described in Section 9.1, no further business shall be conducted by the Partnership except for taking of such action as shall be necessary for the winding up of its affairs and distribution of its assets to the Partners pursuant to the provisions of this Article 9. Upon such dissolution, the Managing General Partner shall act as liquidator or, if it is unable or unwilling to so act, it shall appoint one or more liquidators, who shall have full authority to wind up the affairs of the Partnership and to make final distribution as provided herein. Upon such dissolution of the Partnership, the liquidator(s) shall determine which, if any, Partnership properties and assets should be distributed in kind, and dispose of all other Partnership properties and assets at the best cash price obtainable therefor and distribute the proceeds as follows: (1) First, to the payment and discharge of all of the Partnership's debts and liabilities to creditors other than the Partners; (2) Second, to the payment and discharge of all of the Partnership's debts and liabilities to Partners in their capacities as creditors of the Partnership; (3) The balance, if any, to the Partners in accordance with the provisions of Article 4. 25 (b) Notwithstanding the foregoing, if any Partner shall be indebted to the Partnership, then, until payment of such indebtedness by said Partner, the liquidator(s) shall retain such Partner's distributive share of the Partnership properties and assets and, after applying the cost of operation of such properties and assets during the period of such liquidation against the income therefrom, the balance of such income shall be applied in liquidation of such indebtedness. However, if at the expiration of six (6) months after notice of such outstanding indebtedness has been given to such Partner and such amount has not been paid or otherwise liquidated in full, the liquidator(s) may sell the assets allocable to such Partner at public or private sale at the best price immediately obtainable, such best price to be determined in the sole judgement of the liquidator(s). So much of the proceeds of such sale as shall be necessary to liquidate such indebtedness shall then be so applied, and the balance of such proceeds, if any, shall be distributed to such Partner. Any gain or loss realized for Federal income tax purposes upon the disposition of such assets shall, to the extent permitted by law, be allocated to such Partner, and to the extent not so permitted, to the Partners. Thereafter, the liquidator(s) shall comply with all requirements of the Act, or other applicable law, pertaining to the winding up of a limited partnership, at which time the Partnership shall stand terminated. (c) In the event the Managing General Partner's interest in the Partnership is "liquidated" within the meaning of Regulations Section 1.704- 1(b)(2)(ii)(g) (including, without limitation, upon the liquidation of the Partnership) and the Managing General Partner's Capital Account has a deficit balance after giving effect to all contributions, distributions and allocations for all taxable years, including the year during which such liquidation occurs, the Managing General Partner shall contribute to the capital of the Partnership the amount necessary to restore such deficit balance to zero in compliance with Regulations Section 1.704-1(b)(2)(ii)(b)(3). ARTICLE 10 - MISCELLANEOUS SECTION 10.1 Redemption Agreement. -------------------- This Agreement and the Partners hereto are subject to the terms and provisions of the Redemption Agreement. If, and to the extent that, any terms or provisions of this Agreement are inconsistent with any terms and provisions of the Redemption Agreement, the terms and provisions of the Redemption Agreement shall govern and control. SECTION 10.2 Notice. ------ All notices, demands, consents, options, elections, or other communications hereunder shall be in writing and shall be deemed to have been exercised, made or given upon delivery if delivered by hand or by courier service and three (3) business days after being deposited in the United States mail and sent by certified or registered mail, return receipt requested, postage prepaid. Any notice required to be sent to any Partner shall be sent to the addresses specified on 26 Schedule A attached hereto and incorporated herein. Any party may designate an - ---------- alternative address on five (5) days' notice to the Partnership. SECTION 10.3 Further Assurances. ------------------ Each of the Partners will hereafter execute and deliver such further instruments, and do such further acts as may be required to carry out the intent and purposes of this Agreement. SECTION 10.4 Agreement in Counterparts. ------------------------- This Agreement may be executed in one or more counterparts and all such counterparts shall constitute one agreement binding on all the parties, notwithstanding that all the parties are not signatories to the original or the several counterparts. SECTION 10.5 Construction. ------------ None of the provisions of this Agreement shall be for the benefit or enforceable by the creditors of the Partnership. SECTION 10.6 Governing Law. ------------- This Agreement shall, except as herein otherwise expressly provided, be governed and construed in accordance with the laws of the State of California. SECTION 10.7 Amendments. ---------- This Agreement may be amended only by a written amendment signed by all of the Partners. SECTION 10.8 Pronouns. -------- Any pronouns and any variations thereof used herein shall be deemed to refer to the masculine, feminine, neuter, singular or plural, as the identity of the undersigned may require. SECTION 10.9 Successors in Interest. ---------------------- Except as otherwise provided herein, all provisions of this Agreement shall be binding upon, inure to the benefit of, and be enforceable by and against the respective heirs, executors, administrators, personal representatives, successors and permitted assigns of any of the parties to this Agreement. However, nothing in this Agreement, whether expressed or implied, is intended to confer upon any entity, other than specifically provided, any rights or benefits under or by reason of this Agreement. 27 SECTION 10.10 Headings. -------- The headings contained at the beginning of each Article and Section are for purposes of convenience only and are not intended to limit, expand or define the content thereof. SECTION 10.11 Consent to Jurisdiction and Service of Process. ---------------------------------------------- ALL JUDICIAL PROCEEDINGS BROUGHT AGAINST ANY PARTY HERETO ARISING OUT OF OR RELATING TO THIS AGREEMENT MAY BE BROUGHT IN ANY STATE OR FEDERAL COURT OF COMPETENT JURISDICTION IN THE STATE OF CALIFORNIA, AND BY EXECUTION AND DELIVERY OF THIS AGREEMENT EACH PARTY HERETO ACCEPTS FOR ITSELF, GENERALLY AND UNCONDITIONALLY, THE NONEXCLUSIVE JURISDICTION OF THE AFORESAID COURTS AND WAIVES ANY DEFENSE OF FORUM NON CONVENIENS AND IRREVOCABLY AGREES TO BE BOUND BY ANY JUDGMENT RENDERED THEREBY IN CONNECTION WITH THIS AGREEMENT. Each party hereby agrees that service of all process in any such proceeding in any such court may be made by registered or certified mail, return receipt requested, to any party hereto, at its address provided in this Agreement, such service being hereby acknowledged by each party to be sufficient for personal jurisdiction in any action against such party in any such court and to be otherwise effective and binding service in every respect. Nothing herein shall affect the right to serve process in any other manner permitted by law. SECTION 10.12 Waiver of Jury Trial. -------------------- EACH OF THE PARTIES TO THIS AGREEMENT HEREBY AGREES TO WAIVE ITS RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF ACTION BASED UPON OR ARISING OUT OF THIS AGREEMENT OR THE SUBJECT MATTER OF THIS AGREEMENT. The scope of this waiver is intended to be all-encompassing of any and all disputes that may be filed in any court and that relate to the subject matter of this Agreement, including, without limitation, contract claims, tort claims, beach of duty claims and all other common law and statutory claims. Each party hereto acknowledges that this waiver is a material inducement to enter into a business relationship, that each has already relied on this waiver in entering into this Agreement, and that each shall continue to rely on this waiver in their related future dealings. Each party hereto further warrants and represents that it has reviewed this waiver with its legal counsel and that it knowingly and voluntarily waives its jury trial rights following consultation with such legal counsel. THIS WAIVER IS IRREVOCABLE, MEANING THAT IT MAY NOT BE MODIFIED EITHER ORALLY OR IN WRITING, AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS OR MODIFICATIONS TO THIS AGREEMENT. In the event of litigation, this Agreement may be filed as a written consent to a trial by the court. 28 IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the day and year first above written. WITNESS: MANAGING GENERAL PARTNER: ------------------------ BOSTON PROPERTIES LLC By: Boston Properties Limited Partnership, Managing Member By: Boston Properties, Inc., General Partner /s/ Frank D. Burt By: /s/ Thomas J. O'Connor -------------------------------- ------------------------------- Name: Thomas J. O'Connor Title: Vice President WITNESS: NON-MANAGING GENERAL PARTNERS: ----------------------------- BP EC3 HOLDINGS LLC By: Boston Properties Limited Partnership, Managing Member By: Boston Properties, Inc., General Partner /s/ Frank D. Burt By: /s/ Thomas J. O'Connor - --------------------------------- ------------------------------- Name: Thomas J. O'Connor Title: Vice President WITNESS: THE PRUDENTIAL INSURANCE COMPANY OF AMERICA /s/ Frank D. Burt By: /s/ Gary L. Frazier - --------------------------------- ------------------------------ Name: Gary L. Frazier Title: Vice President 29 SCHEDULE A ---------- ATTACHED TO AMENDED AND RESTATED PARTNERSHIP AGREEMENT OF THREE EMBARCADERO CENTER VENTURE Managing General Partner ------------------------ Name and Address Percentage Interest - ---------------- ------------------- Boston Properties LLC 0.499747% c/o Boston Properties, Inc. 8 Arlington Street Boston, Massachusetts 02116 Non-Managing Partners --------------------- Name and Address Percentage Interest - ---------------- ------------------- BP EC3 Holdings LLC 49.474990% c/o Boston Properties, Inc. 8 Arlington Street Boston, Massachusetts 02116 The Prudential Insurance Company 50.025263% of America c/o Prudential Realty Group 8 Campus Drive 4th Floor - Arbor Circle South Parsippany, New Jersey 07054 Attention: John R. Triece Facsimile: (201) 683-1797 with copies to: Prudential Insurance Company of America O'Melveny & Myers 4 Embarcadero Center, Suite 2700 Embarcadero Center West San Francisco, CA 94111 275 Battery Street Attention: Harry Mixon San Francisco, CA 94111 Facsimile: (415) 956-2197 Attention: Stephen A. Cowan Facsimile: (415) 984-8701 EXHIBIT A --------- Legal Description of Three Embarcadero Center --------------------------------------------- [INTENTIONALLY OMITTED] EXHIBIT B --------- Approved Terms and Conditions of Loans from Managing General Partner The Partnership shall be permitted to borrow funds from the Managing General Partner from time to time, as determined in the sole discretion of the Managing General Partner, for the purpose of funding working capital, leasing commissions, tenant improvements, capital expenditures and other expenditures relating to the Property. Each such borrowing shall be in the form of an unsecured loan and shall be evidenced by a note issued by the Partnership to the Managing General Partner in the form of Exhibit A attached to this Exhibit B. --------- --------- Exhibit A [FORM OF BP NOTE] - --------- DELAYED DEMAND NOTE ------------------- $____________________ San Francisco, California _____________, 19__ At any time after _________, 199_ [the date which is 120 days after the date of the Closing under the Master Transaction Agreement], FOR VALUE RECEIVED, THREE EMBARCADERO CENTER VENTURE, a California general partnership with a principal place of business in San Francisco, California (the "Maker"), promises ----- to pay [BOSTON PROPERTIES LIMITED PARTNERSHIP, a Delaware limited partnership] [other BPLLC affiliate] with a principal place of business in Boston, Massachusetts, ON DEMAND, the principal sum of _____________________ ($__________), with interest thereon at the rate of ten percent (10%) per annum. Interest shall be computed on the number of days principal is outstanding based on a 365 day year. All interest accruing under this Note shall be due and payable (i) monthly in arrears on the fifth (5th) day of each succeeding calendar month, commencing ________, 199_ [fifth day of calendar month following month in which note is made] and continuing thereafter until all amounts due hereunder have been paid in full, or (ii) at the option of the holder, on demand at any time after __________, 199_ [the date which is 120 days after the date of the Closing under the Master Transaction Agreement]. The outstanding balance of principal due hereunder may be prepaid in full at any time, or from time to time in part in multiples of One Thousand Dollars ($1,000.00) without any prepayment premium. The Maker agrees to pay all charges of the holder hereof in connection with the collection and enforcement of this Note, including reasonable attorneys' fees and disbursements. The Maker hereby waives presentment, demand, notice, protest and all other suretyship defenses generally and agrees that any renewal, extension or postponement of the time of payment or any other indulgence, may be effected without notice to and without releasing the Maker from any liability hereunder. This Note shall have the effect of an instrument under seal. THREE EMBARCADERO CENTER VENTURE By: Boston Properties LLC, its managing general partner By: Boston Properties Limited Partnership, its managing member By: Boston Properties, Inc., its general partner By:________________________ Name: Title: EXHIBIT C --------- DESCRIPTION OF EQUITY REDEMPTION LOAN ------------------------------------- The "Equity Redemption Loan" shall mean that certain loan to the Partnership in the aggregate principal amount of $65,897,000, which loan is made pursuant to a certain Term Loan Agreement dated as of November 12, 1998 by and among BankBoston, N.A., The Chase Manhattan Bank, Fleet National Bank, PNC Bank, National Association, Dresdner Bank AG New York Branch and Grand Cayman Branch, The Bank of New York, Key Bank National Association, Citizens Bank and other banks which may become parties thereto as the lenders thereunder, and One Embarcadero Center Venture, Embarcadero Center Associates, Three Embarcadero Center Venture and Four Embarcadero Center Venture, collectively as the borrowers thereunder, which Term Loan Agreement provides for loans to the borrowers in the aggregate principal amount of $328,143,000. The $65,897,000 loan to the Partnership under such Term Loan Agreement is evidenced by a promissory note of the Partnership in the form provided in such Term Loan Agreement. EXHIBIT D --------- DESCRIPTION OF PRUDENTIAL GUARANTIED LOAN ----------------------------------------- The "Prudential Guarantied Loan" shall mean that certain loan to the Partnership in the aggregate principal amount of $11,000,000, which loan is made pursuant to a certain Term Loan Agreement dated as of November 12, 1998 by and among The Chase Manhattan Bank as lender thereunder, and One Embarcadero Center Venture, Embarcadero Center Associates, Three Embarcadero Center Venture and Four Embarcadero Center Venture, collectively as the borrowers thereunder, which Term Loan Agreement provides for loans to the borrowers in the aggregate principal amount of $92,000,000. The $11,000,000 loan to the Partnership under such Term Loan Agreement is evidenced by a promissory note of the Partnership in the form provided in such Term Loan Agreement. EXHIBIT E --------- Description of Business Interruption and General Liability Insurance
Business Interruption Insurance $145,000,000 Commercial General Liability $ 2,000,000 Umbrella Liability Program $200,000,000
EXHIBIT F --------- Description of Financing Plan for Three Embarcadero Center Venture 1. Equity Redemption Loan. Upon the execution of this Agreement, the ---------------------- Partnership will enter into a 90 day Term Loan Agreement with BankBoston, N.A., on behalf of itself and as agent for the several banks that are parties thereto, to borrow approximately $65,897,000 with a term of 90 days, which borrowing shall be guaranteed by Boston Properties Limited Partnership ("BPLP"). This ---- loan constitutes the Equity Redemption Loan. Interest on the outstanding indebtedness under the Equity Redemption Loan shall accrue at a rate equal to the 30 day Eurodollar rate plus 50 basis points. In addition, upon the closing of the Equity Redemption Loan, the Partnership will pay its proportionate share of the closing fee in the approximate aggregate amount of $116,000. The Partnership shall pledge the Investment Notes to secure obligations of the Partnership under the Equity Redemption Loan. 2. Prudential Guarantied Loan. Upon the execution of this Agreement, the -------------------------- Partnership will also enter into a Term Loan Agreement with The Chase Manhattan Bank, N.A. to borrow approximately $11,000,000 with a term of 90 days, which borrowing shall be guaranteed by The Prudential Insurance Company of America. This loan constitutes the Prudential Guarantied Loan. Interest on the outstanding indebtedness under the Prudential Guarantied Loan shall accrue at a rate equal to the 30 day Eurodollar rate plus 30 basis points. In addition, upon the closing of the Prudential Guarantied Loan, the Partnership will pay its proportionate share of the closing fee in the approximate aggregate amount of $40,000. 3. Advance Under BPLP Line of Credit. Upon the execution of this --------------------------------- Agreement, BPLP will amend its existing Amended and Restated Revolving Credit Agreement (the "Credit Agreement") with BankBoston, N.A., and certain other ---------------- banks for which BankBoston, N.A. serves as agent, to add, inter alia, the Partnership as a Borrower under the Credit Agreement for the purpose of the advance described in the next paragraph. The Equity Redemption Loan will, upon the earlier of the redemption of The Prudential Insurance Company of America from the Partnership or the 90th day after the date of execution of this Agreement, be repaid through (i) a draw on the Credit Agreement by the Partnership of approximately $8,826,000 and (ii) cash of the Partnership in an amount equal to approximately $57,100,000, which cash will represent proceeds from the repayment of the Special BP Loan. As a result of the draw under the Credit Agreement, the Partnership will be a primary obligor with respect to approximately $8,826,000 of indebtedness under the Credit Agreement. 4. Assumption and Release with respect to Prudential Guarantied Loan. ----------------------------------------------------------------- The Prudential Guarantied Loan will, upon the redemption of the interest of The Prudential Insurance Company of America in the Partnership, be assumed by The Prudential Insurance Company of America and the Partnership will be released as a borrower with respect to the Prudential Guarantied Loan and all other obligations with respect thereto, as contemplated by, and subject to the terms and conditions of, the Redemption Agreement. In the event that the interest of The Prudential Insurance Company of America in the Partnership is not redeemed by February 10, 1999, or in the event that the Partnership is not, by such date, released in full from all obligations with respect to the Prudential Guarantied Loan and related obligations, then either (i) Prudential shall continue to guaranty the Prudential Guarantied Loan until such redemption, assumption and release occurs or (ii) if the Partnership repays and refinances the Prudential Guarantied Loan by obtaining any replacement debt ("Replacement Debt"), Prudential shall guarantee the lenders thereof of the punctual payment in full and all other obligations of such Replacement Debt. 5. Secured Financing. Upon the execution of this Agreement, the ----------------- Partnership will enter into a certain $150 million first deed of trust loan with Connecticut General Life Insurance Company.

 
                                                                   EXHIBIT 99.10



                          SECOND AMENDED AND RESTATED
                             PARTNERSHIP AGREEMENT

                                      OF

                        FOUR EMBARCADERO CENTER VENTURE

 
                               TABLE OF CONTENTS

Page ---- ARTICLE 1 - THE PARTNERSHIP......................................................................................... 3 SECTION 1.1 Continuation of the Partnership................................................................. 3 SECTION 1.2 Partnership Name................................................................................ 3 SECTION 1.3 Place of Business............................................................................... 3 SECTION 1.4 General Partnership............................................................................. 3 SECTION 1.5 Term of Partnership............................................................................. 3 SECTION 1.6 Purposes of the Partnership..................................................................... 3 SECTION 1.7 Definitions..................................................................................... 4 ARTICLE 2 - CAPITALIZATION.......................................................................................... 8 SECTION 2.1 Partners' Percentage Interests.................................................................. 8 SECTION 2.2 Additional Capital Contributions; Limitations on Future Capital Contributions; Obligation of Managing Partner to Purchase BP Notes....................................................... 8 SECTION 2.3 Admission of Additional Partners................................................................ 8 SECTION 2.4 Return of Capital Accounts and Redemption of Partnership Interests.............................. 9 SECTION 2.5 Investment Loan, Equity Redemption Loan, Prudential Guarantied Loan, Existing Loans and Replacement Loans............................................................................... 9 ARTICLE 3 - ALLOCATIONS OF PROFITS AND LOSSES....................................................................... 10 SECTION 3.1 Capital Accounts and Allocations of Profit and Loss............................................. 10 ARTICLE 4 - DISTRIBUTIONS........................................................................................... 12 SECTION 4.1 Distributions................................................................................... 12 SECTION 4.2 Amounts Withheld................................................................................ 12 ARTICLE 5 - MANAGEMENT OF THE PARTNERSHIP........................................................................... 12 SECTION 5.1 Management...................................................................................... 12 SECTION 5.2 Rights to Delegate and Employ................................................................... 13 SECTION 5.3 Enumeration of Specific Rights and Powers....................................................... 13 SECTION 5.4 Limitations on Managing General Partner's Authority............................................. 15 SECTION 5.5 Filing of Returns and Other Writings............................................................ 16 SECTION 5.6 Other Permissible Activities.................................................................... 16 SECTION 5.7 Contracts with Affiliates; Borrowing from Partners.............................................. 17 SECTION 5.8 Indemnification................................................................................. 17 SECTION 5.9 Liability of the Managing General Partner....................................................... 19 SECTION 5.10 Other Matters Concerning the Managing General Partner........................................... 20 ARTICLE 6 - ACCOUNTING.............................................................................................. 20 SECTION 6.1 Fiscal Year and Tax Accounting Method........................................................... 20
(i)
Page ---- SECTION 6.2 Books, Records, and Tax Reports................................................................. 21 SECTION 6.3 Accounting Practice............................................................................. 21 SECTION 6.4 Accountants..................................................................................... 21 SECTION 6.5 Bank Accounts................................................................................... 21 ARTICLE 7 - RIGHTS AND OBLIGATIONS OF THE NON-MANAGING............................................................. 21 SECTION 7.1 Contributions by Non-Managing General Partners.................................................. 21 SECTION 7.2 Corporate Authority............................................................................. 21 SECTION 7.3 Role of Non-Managing General Partners........................................................... 22 SECTION 7.4 Rights and Obligations Under the Act............................................................ 22 SECTION 7.5 Redemption Rights............................................................................... 22 ARTICLE 8 - WITHDRAWAL AND REPLACEMENT OF PARTNERS AND.............................................................. 22 SECTION 8.1 Non-Managing General Partners................................................................... 22 SECTION 8.2 Managing General Partner........................................................................ 22 SECTION 8.3 Transfer of Partnership Interests............................................................... 22 SECTION 8.4 Substituted Non-Managing General Partners....................................................... 23 SECTION 8.5 Assignees....................................................................................... 24 ARTICLE 9 - DISSOLUTION, LIQUIDATION AND TERMINATION................................................................ 25 SECTION 9.1 Dissolution..................................................................................... 25 SECTION 9.2 Liquidation..................................................................................... 25 ARTICLE 10 - MISCELLANEOUS.......................................................................................... 26 SECTION 10.1 Redemption Agreement............................................................................ 26 SECTION 10.2 Notice.......................................................................................... 26 SECTION 10.3 Further Assurances.............................................................................. 27 SECTION 10.4 Agreement in Counterparts....................................................................... 27 SECTION 10.5 Construction.................................................................................... 27 SECTION 10.6 Governing Law................................................................................... 27 SECTION 10.7 Amendments...................................................................................... 27 SECTION 10.8 Pronouns........................................................................................ 27 SECTION 10.9 Successors in Interest.......................................................................... 27 SECTION 10.10 Headings........................................................................................ 27 SECTION 10.11 Consent to Jurisdiction and Service of Process.................................................. 28 SECTION 10.12 Waiver of Jury Trial............................................................................ 28
(ii) SCHEDULES AND EXHIBITS Schedule A Partners and Percentage Interests Exhibit A Legal Description of Property Exhibit B Approved Terms and Conditions of Loans from Managing General Partner Exhibit C Description of Equity Redemption Loan Exhibit D Description of Prudential Guarantied Loan Exhibit E Description of Business Interruption and General Liability Insurance Exhibit F Description of Financing Plan for the Partnership Exhibit G Form of Special BP Loan Note (iii) SECOND AMENDED AND RESTATED PARTNERSHIP AGREEMENT OF FOUR EMBARCADERO CENTER VENTURE This SECOND AMENDED AND RESTATED PARTNERSHIP AGREEMENT OF FOUR EMBARCADERO CENTER VENTURE (this "Agreement") is entered into and shall be effective as of --------- the 12th day of November, 1998, by and between Boston Properties LLC, a Delaware limited liability company, having a mailing address c/o Boston Properties, Inc., 8 Arlington Street, Boston, Massachusetts 02116, as managing general partner ("BPLLC" or the "Managing General Partner"), BP EC4 Holdings LLC, a Delaware ------ ------------------------ limited liability company, having a mailing address c/o Boston Properties, Inc., 8 Arlington Street, Boston, Massachusetts 02116, as non-managing general partner ("Holdings LLC"), and The Prudential Insurance Company of America, a New Jersey ------------ corporation, having a mailing address c/o Prudential Realty Group, 8 Campus Drive, 4th Floor - Arbor Circle South, Parsippany, New Jersey 07054 ("Prudential"), as non-managing general partner. Holdings LLC and Prudential ---------- are sometimes hereinafter referred to as the "Non-Managing General Partners" and ----------------------------- each as a "Non-Managing General Partner." The Managing General Partner and the ---------------------------- Non-Managing General Partners are sometimes hereinafter referred to as the "Partners." -------- RECITALS: A. FOUR EMBARCADERO CENTER VENTURE (the "Partnership") is a California ----------- general partnership formed pursuant to and governed by that certain Agreement of Partnership dated as of January 1, 1979, creating a general partnership named Four Embarcadero Center Venture, and as subsequently amended on December 29, 1986, December 31, 1986, January 1, 1992 and September 28, 1998 (as revised to such date, the "Prior Partnership Agreement"). --------------------------- B. The Partnership owns and has in operation that certain parcel of real property situated in the City and County of San Francisco, California, and more particularly described on Exhibit A hereto, upon which is erected an office --------- building, related improvements and personal property owned by the Partnership and situated thereon or therein, known generally as Four Embarcadero Center (the "Real Property"). ------------- C. On September 30, 1998, the interest of Fedmark Corporation, a Delaware corporation ("Fedmark"), in the Partnership was redeemed for cash. Following ------- such redemption, all of the outstanding partnership interests in the Partnership were held by Prudential, with a 50.020258% partnership interest, and Embarcadero Center Investors Partnership, a California limited partnership ("ECIP"), with a ---- 49.979742% partnership interest. D. Pursuant to that certain Master Transaction Agreement, dated September 28, 1998 (the "Master Transaction Agreement"), by and among (i) Prudential, PIC ---------------------------- Realty Corporation, a Delaware corporation ("PIC"), Fedmark, ECIP, Pacific Property Services, L.P., a California limited partnership, and the other persons identified therein on Exhibit A thereto, on the one hand, and (ii) Boston --------- Properties Limited Partnership, a Delaware limited partnership (the "Operating --------- Partnership"), and Boston Properties, Inc., a Delaware corporation ("Public - ----------- ------ Company") on the other hand, the Operating Partnership acquired the right, - ------- subject to the satisfaction of various conditions, to have all of the partners of ECIP contribute to the Operating Partnership all of their interests in ECIP. On November 12, 1998, following the redemption of Fedmark as a partner of the Partnership as described in the preceding paragraph, the closing of the transactions contemplated by the Master Transaction Agreement occurred, and the Operating Partnership directed the partners of ECIP to convey their interests in ECIP to BP EC1 Holdings LLC, a Delaware limited liability company ("Holding 1 LLC") and the partners of ECIP did so convey their interests in ECIP to Holdings 1 LLC (which conveyance constituted a contribution to the Operating Partnership). Upon such conveyance, by operation of law ECIP dissolved and Holdings 1 LLC succeeded to ECIP's 49.979742% partnership interest in the Partnership. Prior to the amendment and restatement of this Agreement, Holdings 1 LLC conveyed to BPLLC a 0.499798% partnership interest in the Partnership and conveyed to Holdings LLC a 49.479944% partnership interest in the Partnership. As a result of the foregoing, (i) ECIP and Fedmark (the "Withdrawing Partners") -------------------- have ceased to be partners of the Partnership, (ii) BPLLC and Holdings LLC have been admitted as partners of the Partnership, and (iii) as of the date hereof BPLLC, Prudential and Holdings LLC are the sole partners of the Partnership with percentage interests of 0.499798%, 50.020258% and 49.479944%, respectively. E. To reflect the transfers, successions, admissions and withdrawals recited above, to provide for the continuation of the Partnership as a California general partnership under the Act, and to provide for the revised terms and conditions under which the Partnership will continue in existence and be governed, the parties wish to amend and restate the Prior Partnership Agreement in its entirety, as provided herein. NOW, THEREFORE, in consideration of the foregoing, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows: I. Transfer of Partnership Interests. Pursuant to the transactions --------------------------------- described in the Recitals above, the Withdrawing Partners have ceased to be partners in the Partnership, BPLLC has been admitted as the Managing General Partner of the Partnership with a 0.499798% Percentage Interest and Holdings LLC has been admitted as a Non-Managing General Partner of the Partnership with a 49.479944% Percentage Interest. Prudential shall continue as a Non-Managing General Partner of the Partnership with a 50.020258% Percentage Interest. II. Amendment and Restatement. The Original Partnership Agreement is ------------------------- hereby amended and restated in its entirety as follows: 2 ARTICLE 1 - THE PARTNERSHIP SECTION 1.1 Continuation of the Partnership. ------------------------------- The Partners hereby agree to continue the Partnership as a general partnership under and pursuant to the Uniform Partnership Act of the State of California (the "Act") as the same is now or hereafter amended. The Partners --- shall promptly execute, and the Managing General Partner shall promptly cause to be filed with the proper offices, any certificate or amendments thereto required by the Act or any other applicable partnership act, fictitious name act, or similar statute in effect, or for any reasonable purpose. SECTION 1.2 Partnership Name. ---------------- The name of the Partnership shall continue to be "FOUR EMBARCADERO CENTER VENTURE." All business of the Partnership shall be conducted under such name or under such variations thereof as the Managing General Partner deems necessary or appropriate to comply with the requirements of law in any applicable jurisdiction in which the Partnership may do business. SECTION 1.3 Place of Business. ----------------- The principal place of business of the Partnership shall be c/o Boston Properties, Inc., Four Embarcadero Center, Suite 2600, San Francisco, California 94111, or at such other place or places as the Managing General Partner may designate. SECTION 1.4 General Partnership. ------------------- The Partnership shall be a general partnership, governed by the Act. The interests of the Partners in the Partnership shall be personal property for all purposes. All real and other property owned by the Partnership shall be deemed owned by the Partnership, as a partnership, and no Partner, individually, shall have any ownership of such property. SECTION 1.5 Term of Partnership. ------------------- The term of the Partnership shall continue until 12:00 noon on December 31, 2050, unless sooner terminated in accordance with the terms and conditions of this Agreement, or by applicable law. SECTION 1.6 Purposes of the Partnership. --------------------------- The purpose of the Partnership shall be: 3 (a) to own, manage, develop, improve, renovate, rehabilitate, operate, hold for investment, lease, encumber, mortgage, pledge, assign, exchange, sell and/or otherwise deal with the Property; (b) to retain managing agents and consultants therefor, and to do all things necessary or useful in connection with any of the foregoing; (c) in addition to, and in furtherance of these purposes and powers, the Partnership shall have the power (i) to borrow money and issue evidences of indebtedness and to secure same by mortgage, pledge or other lien (including, without limitation, obtaining the Equity Redemption Loan and Prudential Guarantied Loan), and (ii) to guarantee the obligations of any other Person when done in furtherance of the Partnership's business, including any indebtedness of such Person, and to secure such guarantee obligations by mortgage, pledge or other lien on any asset of the Partnership; (d) to make and service the Investment Loan as contemplated herein; (e) subject to the express terms, provisions and restrictions of this Agreement, to engage in and consummate the transactions described in the Master Transaction Agreement; (f) to enter into the Redemption Agreement and consummate the transactions described therein; and (g) to enter into, perform and carry out contracts of any kind necessary to, or in connection with, or incidental to the accomplishment of any of the foregoing purposes; and (h) to use the Excess Mortgage Loan Proceeds to make the Special BP Loan. The Partnership shall not engage in any other business. It is further agreed that the Partnership shall at all times adhere to at least the level of quality in the maintenance and operation of the Property as a first class office and retail complex as maintained by the Partnership during the twelve (12) month period preceding the date hereof. SECTION 1.7 Definitions. ----------- In addition to the capitalized terms defined in the recitals and elsewhere herein, the following terms shall have the following meanings: "Act" has the meaning set forth in Section 1.1 hereof. --- 4 "Affiliate" means, with respect to any Person, any Person directly or --------- indirectly controlling, controlled by or under common control with such Person. For purposes of this definition, "control," when used with respect to any Person, means the power to direct the management and policies of such Person, directly or indirectly, whether through the ownership of voting securities, by contract or otherwise, and the terms "controlling" and "controlled" have meanings correlative to the foregoing. No officer, director or equity owner of the Managing General Partner shall be considered an Affiliate of the Managing General Partner solely as a result of serving in such capacity or being an equity owner of the Managing General Partner. "Approved Loan Costs" shall mean all fees, costs and expenses incurred by ------------------- the Partnership or any Partner in connection with the Equity Redemption Loan or Prudential Guarantied Loan that are expressly approved by each of the Partners (which approval shall not be unreasonably withheld, conditioned or delayed), including, without limitation, (i) all fees and expenses of the lender(s) thereof subject to reimbursement by the Partnership or any Partner, and (ii) all of the reasonable legal fees and expenses incurred directly by such Persons (or any of their constituent owners) in connection with the Equity Redemption Loan and the Prudential Guarantied Loan. "Borrowing Costs" of a loan shall mean the cost of procuring and repaying --------------- such loan expressed as an "all-in" effective annual interest rate per annum to be determined taking into account all costs of procuring and repaying such loan including, without limitation, all (i) periodic interest and other amounts due and payable in connection with such loan, (ii) all loan points and fees paid with respect to such loan, (iii) all fees and expenses of the lender(s) thereof that are subject to payment or reimbursement by the borrower in connection therewith, and (iv) all legal fees and expenses incurred by the borrower in connection therewith; provided that, all points, fees, costs and expenses will -------- ---- be amortized on a straight-line basis over the term of the loan. "BP Note" means a note, in the form and for a purpose described in Exhibit ------- ------- B hereto, given by the Partnership to the Managing General Partner or any of its - - Affiliates. "BP Partners" means Boston Properties LLC, the Managing General Partner, ----------- and BP EC4 Holdings LLC, a Non-Managing General Partner. "Capital Contributions" means, with respect to any Partner, the amount of --------------------- money and the initial fair market value of any property (other than money) contributed to the Partnership with respect to the interest in the Partnership held by such Person less the amount of liabilities to which such property is subject and which the Partnership is considered to assume pursuant to the provisions of Section 752 of the Code (as defined below). "Code" means the Internal Revenue Code of 1986, as amended from time to ---- time (or any corresponding provisions of succeeding law). 5 "Equity Redemption Loan" shall mean a loan to the Partnership governed by ---------------------- the term loan agreement particularly described on Exhibit C attached hereto, a --------- true, correct and complete copy of which has been delivered to each of the Partners prior to the date hereof. "Equity Redemption Loan" shall also include any extension or modification of the Equity Redemption Loan and any new loan obtained by the Partnership to replace or refinance the Equity Redemption Loan; provided that, any such extension, modification or new loan shall be in - -------- ---- compliance with the terms and provisions of this Agreement and the Redemption Agreement. "Excess Mortgage Loan Proceeds" shall mean the excess proceeds of any new ----------------------------- mortgage loan borrowing secured by the Real Property over and above the amounts of such proceeds used to (i) repay any existing mortgage debt secured by the Real Property prior to the date hereof, (ii) pay any prepayment penalty, premium or fee in connection with any such existing mortgage loan that is repaid, and (iii) pay the transaction costs incurred by the Partnership in connection with such borrowing or the prepayment of any existing mortgage loan. "Indemnitee" means (i) any Person made a party to a claim or proceeding by ---------- reason of (A) his or its status as a Partner, or as a director or officer of the Partnership or a Partner, or (B) his or its liabilities, pursuant to a loan guarantee or otherwise, for any indebtedness of the Partnership (including, without limitation, any indebtedness which the Partnership has assumed or taken assets subject to); and (ii) such other Persons (including Affiliates of a Partner or the Partnership) as the Managing General Partner may reasonably designate from time to time (whether before or after the event giving rise to potential liability), for a purpose related to Partnership business. "Interest Rate Approved Loan Costs" has the meaning given thereto in --------------------------------- Section 2.5(e)(i). "Investment Loan" shall mean a loan made by the Partnership to the --------------- Investment Loan Borrower in an amount equal to $143,119,000 pursuant to (and in accordance with the terms and provisions of) that certain Note Purchase Agreement of even date herewith, by and between the Partnership and Investment Loan Borrower. "Investment Loan Borrower" shall mean Prudential Realty Securities, Inc., a ------------------------ Delaware corporation. "Investment Notes" means the promissory notes of the Investment Loan ---------------- Borrower acquired by the Partnership in connection with the Investment Loan. "Managing General Partner" means Boston Properties LLC, a Delaware limited ------------------------ liability company, and any other Person who may become a Managing General Partner pursuant to the terms of this Agreement, in either case until such Person has ceased to be a Managing General Partner pursuant to the terms of this Agreement. "Non-Managing General Partner" means BP EC4 Holdings LLC, a Delaware ---------------------------- limited liability company, and The Prudential Insurance Company of America, a New Jersey 6 corporation, and any other Person who may become a Non-Managing General Partner pursuant to the terms of this Agreement, in each such case until such Person has ceased to be a Non-Managing General Partner pursuant to the terms of this Agreement. "Non-Managing General Partners" means all such Persons, if there is more than one. If at any time there is more than one Non-Managing General Partner, then all references herein to the Non-Managing General Partner shall, unless the context requires otherwise, be deemed to refer to the Non-Managing General Partners. "Partnership" means the partnership governed by this Agreement and any ----------- partnership continuing the business of the Partnership in the event of dissolution as herein provided. "Percentage Interest" means, with respect to any Partner, the Percentage ------------------- Interest set forth opposite such Partner's name on Schedule A. In the event any ---------- Partner's interest in the Partnership is transferred in accordance with the provisions of this Agreement, the transferee of such interest shall succeed to the Percentage Interest of his transferor to the extent it relates to the transferred interest. "Person" means any individual, partnership, corporation, trust, or other ------ entity. "Property" shall mean the Real Property, including all real property, -------- improvements, leases, licenses, fixtures and tangible and intangible personal property (including, without limitation, cash, deposit accounts, money and other sums and Investment Notes so long as the Partnership holds the same) owned by the Partnership from time to time. "Prudential Guarantied Loan" shall mean a loan to the Partnership governed -------------------------- by the term loan agreement particularly described on Exhibit D attached hereto, --------- a true, correct and complete copy of which has been delivered to each of the Partners prior to the date hereof. "Redemption Agreement" shall mean that certain Redemption Agreement of even -------------------- date herewith, by and among the Partnership and each of the Partners. "Redemption Distribution" means the distribution to Prudential, in full ----------------------- redemption of its interest in the Partnership, of all or a portion of the Investment Notes and, if applicable, cash, as determined in accordance with the Redemption Agreement. "Regulations" means the Income Tax Regulations promulgated under the Code, ----------- as such regulations may be amended from time to time (including corresponding provisions of succeeding regulations). "Special BP Loan" shall mean a loan in the principal amount equal to the --------------- Excess Mortgage Loan Proceeds and at an interest rate per annum equal to twelve (12) basis points above the Borrowing Costs of the Excess Mortgage Loan Proceeds, made by the Partnership to any BP Partner, or any Affiliate of any BP Partner and evidenced by a promissory note in the form of Exhibit G attached --------- hereto. 7 "Transfer" means, as a noun, any voluntary or involuntary transfer, sale, -------- pledge, hypothecation, or other disposition and, as a verb, voluntarily or involuntarily to transfer, sell, pledge, hypothecate, or otherwise dispose of. ARTICLE 2 - CAPITALIZATION SECTION 2.1 Partners' Percentage Interests. ------------------------------ The names and Percentage Interests of the Partners are set forth on Schedule A hereto. - ---------- SECTION 2.2 Additional Capital Contributions; Limitations on Future ------------------------------------------------------- Capital Contributions; Obligation of Managing Partner to -------------------------------------------------------- Purchase BP Notes. ----------------- (a) No Partner shall, except as otherwise required by the Act, other applicable law or this Agreement, be required to make any further Capital Contributions to the Partnership, and so long as Prudential or any Affiliate of Prudential is a Partner, no Capital Contributions shall be made to the Partnership without the prior written consent of Prudential. (b) At no time prior to the second anniversary of the Redemption Distribution shall the Managing General Partner call or accept Capital Contributions from any Partner for the purpose of repaying the Equity Redemption Loan or any debt replacing or refinancing the Equity Redemption Loan, and during such period no Capital Contributions made after the date hereof shall be used in such manner. (c) To the extent that it is necessary or desirable for the Partnership, in the sole discretion of the Managing General Partner, to raise cash for the purpose of funding working capital, capital expenditures, leasing commissions, tenant improvements or other expenditures relating to the Property at a time when the Partnership is unable to raise such cash through the receipt of Capital Contributions because of the prohibition set forth in Section 2.2(a), the Managing General Partner agrees that it (or an Affiliate of the Managing General Partner) will lend funds to the Partnership for such purposes by purchasing BP Notes from the Partnership. SECTION 2.3 Admission of Additional Partners. -------------------------------- The Managing General Partner shall have the right, from time to time, provided it obtains the consent of the Non-Managing General Partners, to admit additional Non-Managing General Partners to the Partnership. Upon the admission of any new Non-Managing General Partner, an amendment of this Agreement, reflecting such change, shall be signed by the Managing General Partner and the additional Non-Managing General Partner, and an amendment to the Certificate, reflecting such change, to the extent required or appropriate under applicable law, shall be signed by all Partners 8 either individually or by the Managing General Partner on their behalf and filed with the Secretary of State of the State of California. SECTION 2.4 Return of Capital Accounts and Redemption of Partnership -------------------------------------------------------- Interests. --------- Except as otherwise provided in this Agreement or as set forth in the Redemption Agreement, (i) no Partner shall have the right to demand and withdraw a return of its Capital Account, and (ii) no Partner shall have the right to receive property other than cash upon a distribution to the Partners, redemption of any Partner's interest or liquidation of the Partnership. No Partner shall receive any interest, salary, or drawing with respect to its Capital Contributions or its Capital Account or for services rendered on behalf of the Partnership or otherwise in its capacity as Partner, except (i) interest received, if any, on BP Notes or (ii) as otherwise provided in this Agreement. SECTION 2.5 Investment Loan, Equity Redemption Loan, Prudential --------------------------------------------------- Guarantied Loan, Existing Loans and Replacement Loans. ----------------------------------------------------- (a) The Partnership is hereby authorized to, and shall, make the Investment Loan to Investment Loan Borrower and acquire the Investment Notes on the date hereof. (b) The Partnership is hereby authorized to, and shall, borrow the Equity Redemption Loan and Prudential Guarantied Loan on the date hereof and shall thereafter perform its obligations in respect thereof subject to the terms and limitations of this Agreement. The proceeds of the Equity Redemption Loan and Prudential Guarantied Loan shall be applied to make the Investment Loan and acquire the Investment Notes on the date hereof. (c) In accordance with Section 2.2(b), the Partnership shall not, at any time prior to the second anniversary of the Redemption Date, use Capital Contributions made after the date hereof for the purpose of repaying the Equity Redemption Loan or any debt replacing the Equity Redemption Loan. (d) Except as otherwise expressly provided in this Agreement, all costs, fees, penalties and expenses incurred in connection with the satisfaction of any debt of the Partnership on the date hereof shall be paid by Prudential, on the one hand, and the BP Partners, on the other hand, in accordance with the terms and provisions of Exhibit V to the Master Transaction Agreement. All --------- Borrowing Costs of the Excess Mortgage Loan Proceeds ("Excess Proceeds Borrowing ------------------------- Costs") shall be paid by the Partnership and capitalized and amortized over the - ----- term of the loan from which the Excess Mortgage Loan Proceeds were derived. All other Borrowing Costs incurred in connection with any Partnership borrowing (other than those described hereinabove and in subsection (e) below) shall be -------------- paid by the BP Partners. (e) Notwithstanding anything to the contrary provided in this Agreement, all costs, fees and expenses incurred in connection with the consummation of the Equity 9 Redemption Loan and Prudential Guarantied Loan shall be paid by the Partnership and borne by the Partners (and reflected in the Partnership's books as follows): (i) Any and all Approved Loan Costs paid in order to reduce or lock the interest rate for the Equity Redemption Loan or Prudential Guarantied Loan (including, without limitation, interest rate lock fees and loan points charged to obtain a reduced, fixed or more favorable rate (collectively, "Interest Rate Approved Loan Costs")) shall be paid by the --------------------------------- Partnership and capitalized and amortized over the term of the appropriate loan; (ii) All other Approved Loan Costs shall be paid by the Partnership as current expenses and borne by each Partner in accordance with its Percentage Interest on the date hereof; (iii) Any other costs and expenses incurred by the Partnership with respect to the Equity Redemption Loan shall be paid by the BP Partners; and (iv) Any other costs and expenses incurred by the Partnership with respect to the Prudential Guarantied Loan shall be paid by Prudential. ARTICLE 3 - ALLOCATIONS OF PROFITS AND LOSSES AND MAINTENANCE OF CAPITAL ACCOUNTS SECTION 3.1 Capital Accounts and Allocations of Profit and Loss. --------------------------------------------------- (a) Capital Accounts. A separate capital account (a "Capital ---------------- ------- Account") shall be maintained for each Partner in accordance with Section 1.704- 1(b)(2)(iv) of the Regulations, and this Section 3.1 shall be interpreted and applied in a manner consistent with such section of the Regulations. The Partnership may, at the election of the Managing General Partner, adjust the Capital Accounts of its Partners to reflect revaluations of the Partnership property whenever the adjustment would be permitted under Regulations Section 1.704-1(b)(2)(iv)(f). In the event that the Capital Accounts of the Partners are so adjusted, (i) the Capital Accounts of the Partners shall be adjusted in accordance with Regulations Section 1.704-1(b)(2)(iv)(g) for allocations of depreciation, depletion, amortization and gain or loss, as computed for book purposes, with respect to such property, and (ii) the Partners' distributive shares of depreciation, depletion, amortization and gain or loss, as computed for tax purposes, with respect to such property shall be determined so as to take account of the variation between the adjusted tax basis and book value of such property in the same manner as under Section 704(c) of the Code. In the event that Code Section 704(c) applies to partnership property, the Capital Accounts of the Partners shall be adjusted in accordance with Regulations Section 1.704-1(b)(2)(iv)(g) for allocations of depreciation, depletion, amortization and gain and loss, as computed for book purposes, with respect to such property. The Partners' distributive shares of depreciation, depletion, amortization and gain or loss, as computed for tax purposes, with respect to such property shall 10 be determined so as to take account of the variation between the adjusted tax basis and book value of such property in the same manner as under Code Section 704(c), and the amount of upward and/or downward adjustments to the book value of the Partnership property shall be treated as income, gain, deduction and/or loss for purposes of applying the allocation provisions of this Article 3. In the event that Code Section 704(c) applies to Partnership property, the Capital Accounts of the Partners shall be adjusted in accordance with Regulations Section 1.704-1(b)(2)(iv)(g) for allocations of depreciation, depletion, amortization and gain and loss, as computed for book purposes, with respect to such property. The amount of all distributions to Partners shall be determined pursuant to Section 4.1 hereof. Notwithstanding any provision contained herein to the contrary, no Partner shall be required to restore any negative balance in its Capital Account. (b) Allocation of Profit and Loss. Generally, all profits and losses ----------------------------- will be allocated in accordance with the Percentage Interests of the Partners. It is the intention of the Partners that all items of Partnership income, gain, loss, and deduction, as determined for book purposes, shall be allocated among the Partners, and shall be credited or debited to their respective Capital Accounts in accordance with Regulations Section 1.704(b)(2)(iv), so as to ensure to the maximum extent possible (i) that such allocations satisfy the economic effect equivalence test of Regulations Section 1.704(b)(2)(ii)(i), by allocating items that can have economic effect in such a manner that the balance of each Partner's Capital Account at the end of any taxable year (increased by such Partner's "share of Partnership minimum gain and Partner minimum gain", as defined in Regulations Section 1.704-2) would be positive in the amount of cash that such Partner would receive (or would be negative in the amount of cash that such Partner would be required to contribute to the Partnership) if the Partnership sold all of its property for an amount of cash equal to the book value (as determined pursuant to Regulations Section 1.704-1(b)(2)(iv)) of such property (reduced, but not below zero, by the amount of nonrecourse debt to which such property is subject) and all of the cash of the Partnership remaining after payment of all liabilities (other than nonrecourse liabilities) of the Partnership were distributed in liquidation immediately following the end of such taxable year pursuant to Article 9, and (ii) that all allocations of items that cannot have economic effect (including credits and nonrecourse deductions) are allocated to the Partners in accordance with the Partners' interests in the Partnership, which, unless otherwise required by Code Section 704(b) and the Regulations promulgated thereunder, shall be their Percentage Interests for the taxable year. (c) Section 704(c) Items. Except to the extent otherwise required by -------------------- the Code, Regulations Section 1.704-3 shall apply to all tax allocations governed by Code Section 704(c) and all "reverse section 704(c) allocations". The Managing General Partner shall determine the method of allocation to be used pursuant to Regulations Section 1.704-3 and shall make all elections under such section; provided, however, that with respect to the "reverse Section 704(c) -------- ------- allocations," caused by the transfers contemplated by the Master Transaction Agreement, the Partnership will use the "traditional method without curative allocations." (d) The tax returns for the Partnership for the 1998 calendar year shall be prepared using the interim closing of the books method. 11 ARTICLE 4 - DISTRIBUTIONS SECTION 4.1 Distributions. ------------- (a) Except as provided in Section 4.1(b) or Section 7.5, and subject to the needs of the Partnership to accumulate reserves, which prior to the Redemption Distribution shall be determined in the sole discretion of the Managing General Partner, distributions to the Partners shall be made in proportion to the Partners' Percentage Interests. Distributions shall be made from time to time at the discretion of the Managing General Partner. (b) Notwithstanding anything to the contrary provided in this Agreement, all payments in respect of title insurance received by the Partnership the amount of which was affected by the non-imputation endorsement to the Partnership's title insurance policy issued as of the date hereof with respect to the Property will be distributed only to the BP Partners in proportion to their respective Percentage Interests. SECTION 4.2 Amounts Withheld. ---------------- All amounts withheld pursuant to the Code or any provision of any state or local tax law with respect to any payment or distribution to the Partnership, the Managing General Partner or the Non-Managing General Partners shall be treated as amounts distributed to the Managing General Partner or Non-Managing General Partners pursuant to this Article for all purposes under this Agreement. The Managing General Partner may allocate any such amounts among the Partners in any manner that is in accordance with applicable law. ARTICLE 5 - MANAGEMENT OF THE PARTNERSHIP SECTION 5.1 Management. ---------- The management powers over the business and affairs of the Partnership are and shall be exclusively vested in the Managing General Partner, who shall be subject to the provisions of this Agreement and to applicable law, and, subject to the consent rights set forth in Section 5.4 hereof, no Non-Managing General Partner shall have any right to participate in or exercise control or management power over the business and affairs of the Partnership. 12 SECTION 5.2 Rights to Delegate and Employ. ----------------------------- The Managing General Partner shall devote such time and effort to the Partnership as it deems necessary and may retain agents as reasonably required or desirable to assist it. The Managing General Partner shall review the status and condition of the Property and shall supervise the activities of any agents engaged by it. The Managing General Partner may delegate any of its powers, rights and obligations hereunder, and, in furtherance of any such delegation, may appoint, employ, contract or otherwise deal with any Person (including Affiliates, but only so long as such employment, contract or other deal is not less favorable to the Partnership than would be an arms-length transaction on market terms) for the transaction of the business of the Partnership, which Persons may, under the supervision of the Managing General Partner, perform any acts or services for the Partnership as the Managing General Partner may approve. SECTION 5.3 Enumeration of Specific Rights and Powers. ----------------------------------------- Subject to Section 5.4, the Managing General Partner shall have all the rights and powers which may be possessed by a general partner in a partnership formed under the Act, which are otherwise conferred by law or which are necessary, advisable or convenient to the discharge of duties under this Agreement and to the management, direction and control of the business and affairs of the Partnership, exercisable without the consent of the Non-Managing General Partners (except as herein expressly provided), including the following rights and powers: (a) to conduct the tax, financial and business affairs of the Partnership; (b) to take all action necessary to acquire, purchase, renovate, rehabilitate, hold, own, improve, operate, encumber, mortgage, pledge, assign, exchange, or to sign notes or guarantee payment of any loans relating to the purposes of the Partnership; (c) to manage, repair, insure, service, promote, advertise, lease, sublease, and create or release interests in the Partnership property; (d) to timely pay out of Partnership funds such expenses as are necessary to carry out the intentions and purposes of the Partnership including real estate taxes and debt service payments to the extent there is sufficient gross cash proceeds. (e) to sell and/or otherwise dispose of all or any portion of the Property; (f) to make appropriate elections permitted under any applicable tax law, provided that such elections will not, in the opinion of counsel or the accountants for the Partnership, be disadvantageous to a majority in interest of the Non-Managing General Partners; (g) to change the principal office of the Partnership to other places subject to the notice provision herein provided; 13 (h) to employ agents, attorneys, public accountants (which shall be, in all events, a "Big Five" accounting firm), and depositories and to grant powers of attorney; (i) to employ persons necessary and appropriate in the operation and management of the Partnership and the Property, including, but not limited to, supervisory managing agents, insurance brokers, real estate brokers, and loan brokers, on such terms and for such compensation which does not exceed generally prevailing market rates, all to act under the supervision of the Managing General Partner, and the Managing General Partner on behalf of the Partnership is hereby authorized to enter into an agreement with any Managing General Partner in their individual capacities or a corporation or other entity affiliated with any Managing General Partner for the performance of such services to the Partnership except as otherwise provided for in this Agreement; (j) to enter into any contract of insurance which the Managing General Partner deems necessary and proper for the protection of the Partnership, the conservation of the Property or any other asset of the Partnership, or for a purpose convenient or beneficial to the Partnership, including but not limited to, a contract naming the Managing General Partner as additional insured, and to continue in force any policies required by any mortgage, lease or other agreement relating to the Property or any part thereof; provided that, so long as Prudential or any Affiliate of Prudential is a - -------- ---- Partner, (i) the Partnership shall maintain reasonable and customary insurance with respect to the Property with amounts and types of coverage that are at least comparable to that maintained by Affiliates of the BP Partners with respect to other properties owned by such Affiliates (after giving effect to differences in the value and nature of such properties) and (ii) the Partnership shall maintain business interruption and commercial general liability insurance in at least the amounts set forth on Exhibit E hereto; --------- (k) to pay, collect, compromise, arbitrate, resort to legal action or otherwise make or defend claims or demands of or against the Partnership; provided that, so long as Prudential, or an Affiliate of Prudential, is a - -------- ---- Partner, neither the Managing General Partner nor the Partnership shall compromise or settle any claim or demand of, or against, the Partnership without Prudential's, or its Affiliate's, consent, which consent will not be unreasonably withheld; (l) to borrow money and issue evidences of indebtedness in furtherance of any and all purposes of the Partnership, including borrowings from Partners of the Partnership, as contemplated by Section 5.7 hereof or otherwise, and including borrowings made in accordance with the financing plan for the Partnership described in Exhibit F hereto; to guarantee the obligations --------- of any other Person (but only when such guaranty is made in furtherance of the business of the Partnership), including the indebtedness of such Person; and to secure any or all of the above by mortgage, pledge, guaranty or other lien on the Property and/or any other asset of the Partnership; and (m) to lend money to any BP Partner or any Affiliate of any BP Partner pursuant to a Special BP Loan. 14 SECTION 5.4 Limitations on Managing General Partner's Authority. --------------------------------------------------- (a) Notwithstanding anything in this Agreement to the contrary, for so long as Prudential is a Partner, the Managing General Partner shall not have the power or authority to, and shall not, cause the Partnership to take any of the following actions, without the consent of Prudential, which consent shall not be unreasonably withheld: (i) other than in the ordinary course of business, cause any closing of a material portion of the Property for renovations (other than repairs necessitated as a result of a fire or other casualty); (ii) cause or permit the engagement by the Partnership in any business other than as contemplated under Section 1.6; ----------- (iii) take any action or make any decision involving credit, management or servicing decisions relating to the Investment Notes other than making an election to accelerate the Investment Notes upon the occurrence of (and during the continuance of) an Event of Default or taking any action or decision relating to the Redemption Distribution; (iv) make a loan to or guarantee the indebtedness of any Person other than (A) loans to tenants of the Property for tenant improvements or (B) a Special BP Loan; (v) cause or permit the sale of (A) all or any material portion of the Property, except leases, concessionaire agreements and space licenses entered into in the ordinary course of business of the Property, or (B) except in connection with the Redemption Distribution, the Investment Notes or any portion thereof or interest therein; (vi) cause the Partnership to (A) obtain any borrowing, (B) issue evidences of indebtedness, or (C) guaranty the obligations of any Person, if such borrowing, issuance or guaranty provides for recourse to Prudential (other than the Prudential Guarantied Loan or the Equity Redemption Loan or Replacement Debt (as defined in Exhibit F); --------- (vii) amend this Agreement if such amendment affects or could affect (A) the receipt, amount or timing of any distributions to Prudential, or (B) Prudential's rights or obligations under this Agreement or the Redemption Agreement; (viii) cause the dissolution of the Partnership, or cause the Partnership to file or otherwise commence a voluntary bankruptcy case, or consent to the commencement of an involuntary bankruptcy case, under the United States Code or under any other applicable bankruptcy, insolvency or similar law now or hereafter in effect, or consent to the entry of an order for relief in an involuntary case, or consent to the 15 appointment of or taking possession by a receiver, trustee or other custodian for all or a substantial part of the Property; (ix) borrow money from the Managing General Partner or any Affiliate of the Managing General Partner except as permitted or required under Sections 2.2(c) and 5.7 or otherwise in this Agreement; ----------------------- (x) assign, relinquish, settle, compromise, waive or impair any of the Partnership's rights under or with respect to, or amend, terminate, extend the term of (or time for payments due, or performance to be rendered, to the Partnership under) or otherwise modify any instrument or agreement under which the Partnership has rights and to which the Managing General Partner or any of its Related Parties is a party; or (xi) engage in any activity without a good faith business purpose therefor and with the intent of manipulating the "Operating Profits" or "Operating Losses" of the Partnership described in the Redemption Agreement in a manner intended to materially adversely affect, to the benefit of the other Partners, the amounts that Prudential would be entitled to receive under this Agreement or the Redemption Agreement. SECTION 5.5 Filing of Returns and Other Writings. ------------------------------------ The Managing General Partner shall be the Tax Matters Partner and is also specifically authorized to and shall cause the preparation and timely filing of all Partnership tax returns and shall, on behalf of the Partnership, subject to the terms and provisions of the Redemption Agreement, make such tax elections for the Partnership as it, after consultation with the Partnership's accountants, shall determine to be in the best interests of the Partners. In addition, the Managing General Partner shall timely file all other forms, documents or other writings with respect to the business and operation of the Partnership which shall be required by any governmental agency or authority having jurisdiction to require such forms, documents or other writings, and shall transmit to each Partner any form or document required to be transmitted by any such governmental agency. SECTION 5.6 Other Permissible Activities. ---------------------------- Nothing herein contained shall be deemed to prevent any Partner or any shareholder or affiliate thereof from engaging in other activities for profit, whether in the real estate business or otherwise. The Managing General Partner (or any shareholder or affiliate thereof), or any Partner, may, in the future, organize and manage joint ventures, additional limited partnerships or other business entities for the acquisition, management and sale of real estate. Neither this Agreement nor any activity undertaken pursuant hereto shall prevent any Partner or any affiliate from engaging in such activities, or require any Partner to permit the Partnership or any Partner to participate in any such activities and, as a material part of the consideration for each Partner's 16 execution hereof, each Partner, for the benefit of the other Partners, hereby waives, relinquishes and renounces any such right or claim of participation. SECTION 5.7 Contracts with Affiliates; Borrowing from Partners. -------------------------------------------------- The Managing General Partner is authorized to enter into agreements on behalf of the Partnership with other persons or entities affiliated with the Partnership and the Partners, including with respect to the borrowing of money from, and issuance of evidences of indebtedness to, Partners of the Partnership in furtherance of any and all purposes of the Partnership, including borrowing from the Managing General Partner or any of its Affiliates for the purposes and on the terms set forth on Exhibit B attached hereto and incorporated herein by --------- reference; provided, however, that all such agreements (other than the giving of -------- ------- BP Notes and the making of the Special BP Loans) shall be disclosed to the other Partners and shall not be less favorable to the Partnership than had such agreement been negotiated at arms-length and on market terms. Notwithstanding any other provision of this Agreement, it is acknowledged and agreed that an Affiliate of the Managing General Partner shall enter into a management agreement with the Partnership for a management fee that does not exceed the management fee that was payable to Pacific Property Services, L.P. (the previous management company that managed the Property) as of May 1, 1998. SECTION 5.8 Indemnification. --------------- (a) To the fullest extent permitted by California law, the Partnership shall indemnify each Indemnitee from and against any and all losses, claims, damages, liabilities, joint or several, expenses (including, without limitation, attorneys fees and other legal fees and expenses), judgments, fines, settlements, and other amounts arising from any and all claims, demands, actions, suits or proceedings, civil, criminal, administrative or investigative, that relate to the operations of the Partnership as set forth in this Agreement, in which such Indemnitee may be involved, or is threatened to be involved, as a party or otherwise, unless it is established that: (i) the act or omission of the Indemnitee was material to the matter giving rise to the proceeding and either was committed in bad faith, was the result of active and deliberate dishonesty, or was the result of a breach of this Agreement by such Indemnitee (or by the Partner of which such Indemnitee is a director or officer); or (ii) the Indemnitee actually received an improper personal benefit in money, property or services, or in the case of any criminal proceeding, the Indemnitee had reasonable cause to believe that the act or omission was unlawful. Without limitation, the foregoing indemnity shall extend to any liability of any Indemnitee, pursuant to a loan guaranty (except a guaranty by a Partner of nonrecourse indebtedness of the Partnership or as otherwise provided in any such loan guaranty) or otherwise for any indebtedness of the Partnership, and the Managing General Partner is hereby authorized and empowered, on behalf of the Partnership, to enter into one or more indemnity agreements consistent with the provisions of this Section 5.8 in favor of any Indemnitee having or potentially having liability for any such indebtedness. The termination of any proceeding by conviction of an Indemnitee or upon a plea of nolo contendere or its equivalent by an Indemnitee, or an entry of an order of probation against an Indemnitee prior to judgment, creates a rebuttable presumption that such Indemnitee acted in a manner 17 contrary to that specified in this Section 5.8(a). Any indemnification pursuant to this Section 5.8 shall be made only out of the assets of the Partnership and shall not impose any personal liability on any Partner, and neither the Managing General Partner nor any Non-Managing General Partner shall have any obligation to contribute to the capital of the Partnership, or otherwise provide funds, to enable the Partnership to fund its obligations under this Section 5.8. (b) If the Managing General Partner avails itself of the indemnification provisions set forth herein, the Managing General Partner shall promptly notify in writing the other Partners of such fact and shall provide a brief description of the nature and magnitude of the indemnification claimed. An Indemnitee, other than the Managing General Partner, may assert a claim for indemnification hereunder by giving written notice thereof to the Managing General Partner. If indemnification is sought for a claim or liability asserted by a third party, the Indemnitee shall also give written notice thereof to the Managing General Partner promptly after it receives notice of the claim or liability being asserted. Such notice shall summarize the bases for the claim for indemnification and any claim or liability being asserted by a third party. The Managing General Partner, on behalf of the Partnership, shall be entitled to direct the defense against a third party claim or liability with counsel selected by it (subject to the consent of the Indemnitee, which consent shall not be unreasonably withheld) as long as the Partnership is conducting a good faith and diligent defense. The Indemnitee shall, at all times, have the right to fully participate in the defense of a third party claim or liability at its own expense, directly or through counsel; provided, however, that if the named -------- ------- parties to the action or proceeding include both the Partnership and the Indemnitee, and the Indemnitee is advised by counsel that representation of both parties by the same counsel would be inappropriate under applicable standards of professional conduct, the Indemnitee may engage separate counsel, whose reasonable fees and expenses shall be borne by the Partnership. If no notice of intent to dispute and defend a third party claim or liability is given by the Managing General Partner within 20 business days of receiving notice of such claim or liability, the Indemnitee shall have the right, at the expense of the Partnership, to undertake the defense of such claim or liability (with counsel selected by the Indemnitee), and to compromise or settle it, exercising reasonable business judgment. If the third party claim or liability is one that, by its nature, cannot be defended solely by the Partnership, then the Indemnitee shall make available such information and assistance as the Managing General Partner may reasonably request and shall cooperate with the Partnership in such defense, at the expense of the Partnership. (c) Subject to the procedures set forth in Section 5.8(b), reasonable expenses incurred by an Indemnitee who is a party to a proceeding in a matter for which the Indemnitee has undertaken the defense pursuant to the provisions of this Section 5.8 (other than as a result of the rejection or dispute by the Managing General Partner of a claim for indemnification under Section 5.8(b)) shall be paid or reimbursed by the Partnership in advance of the final disposition of the proceeding upon receipt by the Partnership of (i) a written affirmation by the Indemnitee of the Indemnitee's good faith belief that the standard of conduct necessary for indemnification by the Partnership as authorized in Section 5.8(a) has been met, and (ii) a written undertaking by or on behalf of the Indemnitee to repay the amount if it shall ultimately be determined that the standard of conduct has not been met. 18 (d) The indemnification provided by this Section 5.8 shall be in addition to any other rights to which an Indemnitee or any other Person may be entitled under this Agreement or any agreement, pursuant to any vote of the Partners, as a matter of law or otherwise, and shall continue as to an Indemnitee who has ceased to serve in such capacity unless otherwise provided in a written agreement pursuant to which such Indemnitee is indemnified. (e) The Partnership may, but shall not be obligated to, purchase and maintain insurance, on behalf of the Indemnitees and such other Persons as the Managing General Partner shall determine in its reasonable discretion, against any liability that may be asserted against or expenses that may be incurred by such Person in connection with the Partnership's activities, regardless of whether the Partnership would have the power to indemnify such Person against such liability under the provisions of this Agreement. (f) In no event may an Indemnitee subject any of the Partners to personal liability by reason of the indemnification provisions set forth in this Agreement. (g) An Indemnitee shall not be denied indemnification in whole or in part under this Section 5.8 solely because the Indemnitee had an interest in the transaction with respect to which the indemnification applies if the transaction was otherwise permitted by the terms of this Agreement. (h) The provisions of this Section 5.8 are for the benefit of the Indemnitees, their heirs, successors, assigns and administrators and shall not be deemed to create any rights for the benefit of any other Persons. Any amendment, modification or repeal of this Section 5.8 or any provision hereof shall be prospective only and shall not in any way affect the Partnership's liability to any Indemnitee under this Section 5.8, as in effect immediately prior to such amendment, modification, or repeal with respect to claims arising from or relating to matters occurring, in whole or in part, prior to such amendment, modification or repeal, regardless of when such claims may arise or be asserted. SECTION 5.9 Liability of the Managing General Partner. ----------------------------------------- (a) Notwithstanding anything to the contrary set forth in this Agreement, except as otherwise expressly provided in this Agreement, the Managing General Partner and its officers and directors shall not be liable for monetary damages to the Partnership, any Partners or any Assignees for losses sustained or liabilities incurred as a result of reasonable errors in judgment or of any act or omission if the Managing General Partner acted in good faith; provided, however, that the Managing General Partner shall be liable to the Partnership and Partners for its material breaches of this Agreement. (b) Subject to its obligations and duties as Managing General Partner set forth in Section 5.3 hereof, and subject to the limitations set forth in Section 5.4 hereof, the Managing General Partner may exercise any of the powers granted to it by this Agreement and perform any of the duties imposed upon it hereunder either directly or by or through its agents. The 19 Managing General Partner shall not be responsible for any misconduct or negligence on the part of any such agent appointed by the Managing General Partner in good faith, except as otherwise expressly provided herein. (c) Any amendment, modification or repeal of this Section 5.9 or any provision hereof shall be prospective only and shall not in any way affect the limitations on the Managing General Partner's liability (and that of its officers and directors) to the Partnership and the Non-Managing General Partners under this Section 5.9 as in effect immediately prior to such amendment, modification or repeal with respect to claims arising from or relating to matters occurring, in whole or in part, prior to such amendment, modification or repeal, regardless of when such claims may arise or be asserted. SECTION 5.10 Other Matters Concerning the Managing General Partner. ----------------------------------------------------- (a) The Managing General Partner may rely and shall be protected in acting, or refraining from acting, upon any resolution, certificate, statement, instrument, opinion, report, notice, request, consent, order, bond, debenture, or other paper or document believed by it in good faith to be genuine and to have been signed or presented by the proper party or parties. (b) The Managing General Partner may consult with legal counsel, accountants, appraisers, management consultants, investment bankers, architects, engineers, environmental consultants and other consultants and advisers selected by it, and any act taken or omitted to be taken in reliance upon the opinion of such Persons as to matters which such Managing General Partner reasonably believes to be within such Person's professional or expert competence shall be conclusively presumed to have been done or omitted in good faith and in accordance with such opinion. (c) The Managing General Partner shall have the right, in respect of any of its powers or obligations hereunder, to act through any of its duly authorized officers and duly appointed attorneys-in-fact. Each such attorney shall, to the extent provided by the Managing General Partner in the power of attorney, have full power and authority to do and perform all and every act and duty which is permitted or required to be done by the Managing General Partner hereunder. ARTICLE 6 - ACCOUNTING SECTION 6.1 Fiscal Year and Tax Accounting Method. ------------------------------------- The Partnership shall operate on the basis of a calendar year, and shall report its operations for tax and all other purposes in accordance with those methods the Managing General Partner and the Partnership's accountant deem advisable. 20 SECTION 6.2 Books, Records, and Tax Reports. ------------------------------- The Partnership shall maintain full and accurate books at its principal office which all Partners shall have the right to inspect and examine during business hours upon reasonable written notice to the Managing General Partner. The Managing General Partner shall keep or cause such books to be kept and shall fully and accurately enter all transactions of the Partnership therein. Such books shall be closed and balanced at the end of each calendar year. On or before March 31 of each year, the Managing General Partner will furnish the Non- Managing General Partners with a balance sheet and a statement of income and expenses of the Partners for the prior calendar year and a report on Treasury Form K-1 containing information relating to the Partnership to be used in preparing a Non-Managing General Partner's personal federal income tax return. SECTION 6.3 Accounting Practice. ------------------- The books of account of the Partnership shall be kept in accordance with good and accepted bookkeeping and accounting practices for similar properties, provided that all methods of accounting and of treating particular transactions shall be in accordance with the methods of accounting employed for Federal income tax purposes. The determinations of the Managing General Partner with respect to the treatment of any items or its allocation for federal, state or local tax purposes shall be binding upon all the Partners so long as such determination shall not be inconsistent with any express term hereof or of the Redemption Agreement. SECTION 6.4 Accountants. ----------- The Partnership's certified public accountant shall be designated by the Managing General Partner, subject to the terms and provisions of Section 5.3(h). SECTION 6.5 Bank Accounts. ------------- The Managing General Partner shall, on behalf of the Partnership, open and maintain a bank account or accounts in a bank or other financial institution of its choosing in which shall be deposited all of the capital, cash receipts and other funds of the Partnership. ARTICLE 7 - RIGHTS AND OBLIGATIONS OF THE NON-MANAGING GENERAL PARTNERS SECTION 7.1 Contributions by Non-Managing General Partners. ---------------------------------------------- Except as provided herein, the Non-Managing General Partners shall not be obligated to make a contribution of any sort whatsoever to the capital of the Partnership, or to provide a loan. SECTION 7.2 Corporate Authority. ------------------- 21 Each Partner hereby represents and covenants that its execution of this Agreement has been duly authorized by proper corporate action or otherwise. SECTION 7.3 Role of Non-Managing General Partners. ------------------------------------- Except as otherwise provided in this Agreement, no Non-Managing General Partner shall take part in, or interfere in any manner with, the conduct or control of the business of the Partnership, or shall have any right or authority to act for or bind the Partnership. SECTION 7.4 Rights and Obligations Under the Act. ------------------------------------ In addition to the foregoing rights (including any limitations thereof) and obligations, the Non-Managing General Partners shall each have those rights and obligations conferred or imposed upon partners of a general partnership under applicable law, to the extent not inconsistent with the terms hereof. SECTION 7.5 Redemption Rights. ----------------- Except as specifically provided in the Redemption Agreement, no Partner shall have the right to withdraw from the Partnership or have its interest in the Partnership redeemed by the Partnership. ARTICLE 8 - WITHDRAWAL AND REPLACEMENT OF PARTNERS AND TRANSFER OF PARTNERSHIP INTEREST SECTION 8.1 Non-Managing General Partners. ----------------------------- No Non-Managing General Partner's interest shall be sold, assigned, transferred, pledged or hypothecated or encumbered (any such transaction, a "Transfer"), in whole or in part, except in accordance with the terms and -------- conditions set forth in this Article 8. Any Transfer or purported Transfer of a Non-Managing General Partner's interest not made in accordance with this Article 8 shall be null and void. SECTION 8.2 Managing General Partner. ------------------------ The Managing General Partner may not Transfer its interest in the Partnership or withdraw from the Partnership without the consent of the Non- Managing General Partners. SECTION 8.3 Transfer of Partnership Interests. --------------------------------- (a) Subject to the provisions of this Article 8, a Non-Managing General Partner may transfer its interest in the Partnership with the consent of the Managing General Partner, which consent may be withheld by the Managing General Partner in its sole and absolute 22 discretion. Nothing in this Agreement shall be deemed to preclude the purchase by the Managing General Partner of any Non-Managing General Partnership interest and the admission of a Managing General Partner as a Non-Managing General Partner in connection therewith. (b) If the interest, or any part thereof, of a Partner in the Partnership is disposed of pursuant to this Section, such Partner shall nevertheless be entitled to a portion of the income, gain, loss, deduction and credit allocated to such interest or part thereof in accordance with the provisions of this agreement for the fiscal year of the Partnership in which such disposition occurs, based upon the number of months during such year that such Partner owned such interest or part thereof. Any predecessor or successor of such Partner in respect of such interest or part thereof shall share in such profits and losses for the fiscal year in which such disposition occurs and the Partnership shall be bound by such allocation, provided the same shall be deemed reasonable by the Partnership's accountants, upon being furnished with timely written notice of same. Distributions of cash or other property shall be made only to such persons who are Partners on the date of distribution. (c) Without limiting the foregoing, the Managing General Partner may prohibit any transfer by a Non-Managing General Partner of its interest in the Partnership if, in the opinion of legal counsel to the Partnership, such transfer would require filing of a registration statement under the Securities Act of 1933 or would otherwise violate any federal or state securities laws or regulations applicable to the Partnership or interests in the Partnership, or would cause a termination of the Partnership under Section 708 of the Code. (d) Without limiting the foregoing, no transfer by a Non-Managing General Partner of its interests in the Partnership may be made to any Person if (i) in the opinion of legal counsel for the Partnership, it would result in the Partnership being treated as an association taxable as a corporation; (ii) such transfer is effectuated through an "established securities market" or a "secondary market (or the substantial equivalent thereof)" within the meaning of Section 7704 of the Code; (iii) such transfer would cause the Partnership to become, with respect to any employee benefit plan subject to Title I of ERISA, a "party-in-interest" (as defined in Section 3(14) of ERISA) or a "disqualified person" (as defined in Section 4975(c) of the Code); (iv) such transfer would, in the opinion of legal counsel for the Partnership, cause any portion of the assets of the Partnership to constitute assets of any employee benefit plan pursuant to Department of Labor Regulations Section 2510.2-101; or (v) such transfer would subject the Partnership to be regulated under the Investment Company Act of 1940, the Investment Advisors Act of 1940 or the Employee Retirement Income Security Act of 1974, each as amended, or would violate any loan documents to which the Partnership is a party. (e) The transfer of a Partnership interest shall not constitute, or result in, a dissolution of the Partnership. SECTION 8.4 Substituted Non-Managing General Partners. ----------------------------------------- 23 (a) No Non-Managing General Partner shall have the right to substitute a transferee as a Non-Managing General Partner in his place. The Managing General Partner shall, however, have the right to consent to the admission of a transferee of the interest of a Non-Managing General Partner pursuant to this Section 8.4 as a Substituted Non-Managing General Partner, which consent may be given or withheld by the Managing General Partner in its sole and absolute discretion. The Managing General Partner's failure or refusal to permit a transferee of any such interests to become a Substituted Non- Managing General Partner shall not give rise to any cause of action against the Partnership or any Partner. (b) A transferee who has been admitted as a Substituted Non-Managing General Partner in accordance with this Article 8 shall have all the rights and powers and be subject to all the restrictions and liabilities of a Non-Managing General Partner under this Agreement. (c) Upon the admission of a Substituted Non-Managing General Partner, the Managing General Partner shall amend Schedule A to reflect the name, ---------- address, and Percentage Interest of such Substituted Non-Managing General Partner and to eliminate or adjust, if necessary, the name, address and interest of the predecessor of such Substituted Non-Managing General Partner. SECTION 8.5 Assignees. --------- If the Managing General Partner, in its sole and absolute discretion, does not consent to the admission of any permitted transferee as a Substituted Non- Managing General Partner, as described in Section 8.4, such transferee shall be considered an Assignee for purposes of this Agreement. An Assignee shall be deemed to have had assigned to it, and shall be entitled to receive distributions from the Partnership and the share of net income, net losses, and any other items, gain, loss deduction and credit of the Partnership attributable to the interest in the Partnership assigned to such transferee, but except as otherwise provided herein shall not be deemed to be a holder of an interest in the Partnership for any other purpose under this Agreement, and shall not be entitled to vote in any matter presented to the Non-Managing General Partners for a vote (such interest in the Partnership being deemed to have been voted on such matter in the same proportion as all other interests held by Non-Managing General Partners are voted). In the event any such transferee desires to make a further assignment of any such interest in the Partnership, such transferee shall be subject to all of the provisions of this Article 8 to the same extent and in the same manner as any Non-Managing General Partner desiring to make such an assignment. 24 ARTICLE 9 - DISSOLUTION, LIQUIDATION AND TERMINATION SECTION 9.1 Dissolution. ----------- (a) Except as herein otherwise expressly provided, the Partnership shall be dissolved upon the occurrence of any of the following events: (1) agreement by all of the Partners to dissolve the Partnership; (2) expiration of the term provided in Section 1.5 hereof; (3) sale or taking by eminent domain or other lawful government action resulting in transfer of title of substantially all of the Partnership's assets; or (4) any other event which, under applicable law, results in the dissolution of the Partnership. (b) Dissolution shall be effective on the date of the event giving rise to the dissolution, but the Partnership shall not terminate until the assets thereof have been distributed in accordance with the provisions of Section 9.2 hereof. SECTION 9.2 Liquidation. ----------- (a) If the Partnership shall be dissolved by reason of the occurrence of any of the circumstances described in Section 9.1, no further business shall be conducted by the Partnership except for taking of such action as shall be necessary for the winding up of its affairs and distribution of its assets to the Partners pursuant to the provisions of this Article 9. Upon such dissolution, the Managing General Partner shall act as liquidator or, if it is unable or unwilling to so act, it shall appoint one or more liquidators, who shall have full authority to wind up the affairs of the Partnership and to make final distribution as provided herein. Upon such dissolution of the Partnership, the liquidator(s) shall determine which, if any, Partnership properties and assets should be distributed in kind, and dispose of all other Partnership properties and assets at the best cash price obtainable therefor and distribute the proceeds as follows: (1) First, to the payment and discharge of all of the Partnership's debts and liabilities to creditors other than the Partners; (2) Second, to the payment and discharge of all of the Partnership's debts and liabilities to Partners in their capacities as creditors of the Partnership; (3) The balance, if any, to the Partners in accordance with the provisions of Article 4. 25 (b) Notwithstanding the foregoing, if any Partner shall be indebted to the Partnership, then, until payment of such indebtedness by said Partner, the liquidator(s) shall retain such Partner's distributive share of the Partnership properties and assets and, after applying the cost of operation of such properties and assets during the period of such liquidation against the income therefrom, the balance of such income shall be applied in liquidation of such indebtedness. However, if at the expiration of six (6) months after notice of such outstanding indebtedness has been given to such Partner and such amount has not been paid or otherwise liquidated in full, the liquidator(s) may sell the assets allocable to such Partner at public or private sale at the best price immediately obtainable, such best price to be determined in the sole judgement of the liquidator(s). So much of the proceeds of such sale as shall be necessary to liquidate such indebtedness shall then be so applied, and the balance of such proceeds, if any, shall be distributed to such Partner. Any gain or loss realized for Federal income tax purposes upon the disposition of such assets shall, to the extent permitted by law, be allocated to such Partner, and to the extent not so permitted, to the Partners. Thereafter, the liquidator(s) shall comply with all requirements of the Act, or other applicable law, pertaining to the winding up of a limited partnership, at which time the Partnership shall stand terminated. (c) In the event the Managing General Partner's interest in the Partnership is "liquidated" within the meaning of Regulations Section 1.704- 1(b)(2)(ii)(g) (including, without limitation, upon the liquidation of the Partnership) and the Managing General Partner's Capital Account has a deficit balance after giving effect to all contributions, distributions and allocations for all taxable years, including the year during which such liquidation occurs, the Managing General Partner shall contribute to the capital of the Partnership the amount necessary to restore such deficit balance to zero in compliance with Regulations Section 1.704-1(b)(2)(ii)(b)(3). ARTICLE 10 - MISCELLANEOUS SECTION 10.1 Redemption Agreement. -------------------- This Agreement and the Partners hereto are subject to the terms and provisions of the Redemption Agreement. If, and to the extent that, any terms or provisions of this Agreement are inconsistent with any terms and provisions of the Redemption Agreement, the terms and provisions of the Redemption Agreement shall govern and control. SECTION 10.2 Notice. ------ All notices, demands, consents, options, elections, or other communications hereunder shall be in writing and shall be deemed to have been exercised, made or given upon delivery if delivered by hand or by courier service and three (3) business days after being deposited in the United States mail and sent by certified or registered mail, return receipt requested, postage prepaid. Any notice required to be sent to any Partner shall be sent to the addresses specified on 26 Schedule A attached hereto and incorporated herein. Any party may designate an - ---------- alternative address on five (5) days' notice to the Partnership. SECTION 10.3 Further Assurances. ------------------ Each of the Partners will hereafter execute and deliver such further instruments, and do such further acts as may be required to carry out the intent and purposes of this Agreement. SECTION 10.4 Agreement in Counterparts. ------------------------- This Agreement may be executed in one or more counterparts and all such counterparts shall constitute one agreement binding on all the parties, notwithstanding that all the parties are not signatories to the original or the several counterparts. SECTION 10.5 Construction. ------------ None of the provisions of this Agreement shall be for the benefit or enforceable by the creditors of the Partnership. SECTION 10.6 Governing Law. ------------- This Agreement shall, except as herein otherwise expressly provided, be governed and construed in accordance with the laws of the State of California. SECTION 10.7 Amendments. ---------- This Agreement may be amended only by a written amendment signed by all of the Partners. SECTION 10.8 Pronouns. -------- Any pronouns and any variations thereof used herein shall be deemed to refer to the masculine, feminine, neuter, singular or plural, as the identity of the undersigned may require. SECTION 10.9 Successors in Interest. ---------------------- Except as otherwise provided herein, all provisions of this Agreement shall be binding upon, inure to the benefit of, and be enforceable by and against the respective heirs, executors, administrators, personal representatives, successors and permitted assigns of any of the parties to this Agreement. However, nothing in this Agreement, whether expressed or implied, is intended to confer upon any entity, other than specifically provided, any rights or benefits under or by reason of this Agreement. SECTION 10.10 Headings. -------- 27 The headings contained at the beginning of each Article and Section are for purposes of convenience only and are not intended to limit, expand or define the content thereof. SECTION 10.11 Consent to Jurisdiction and Service of Process. ---------------------------------------------- ALL JUDICIAL PROCEEDINGS BROUGHT AGAINST ANY PARTY HERETO ARISING OUT OF OR RELATING TO THIS AGREEMENT MAY BE BROUGHT IN ANY STATE OR FEDERAL COURT OF COMPETENT JURISDICTION IN THE STATE OF CALIFORNIA, AND BY EXECUTION AND DELIVERY OF THIS AGREEMENT EACH PARTY HERETO ACCEPTS FOR ITSELF, GENERALLY AND UNCONDITIONALLY, THE NONEXCLUSIVE JURISDICTION OF THE AFORESAID COURTS AND WAIVES ANY DEFENSE OF FORUM NON CONVENIENS AND IRREVOCABLY AGREES TO BE BOUND BY ANY JUDGMENT RENDERED THEREBY IN CONNECTION WITH THIS AGREEMENT. Each party hereby agrees that service of all process in any such proceeding in any such court may be made by registered or certified mail, return receipt requested, to any party hereto, at its address provided in this Agreement, such service being hereby acknowledged by each party to be sufficient for personal jurisdiction in any action against such party in any such court and to be otherwise effective and binding service in every respect. Nothing herein shall affect the right to serve process in any other manner permitted by law. SECTION 10.12 Waiver of Jury Trial. -------------------- EACH OF THE PARTIES TO THIS AGREEMENT HEREBY AGREES TO WAIVE ITS RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF ACTION BASED UPON OR ARISING OUT OF THIS AGREEMENT OR THE SUBJECT MATTER OF THIS AGREEMENT. The scope of this waiver is intended to be all-encompassing of any and all disputes that may be filed in any court and that relate to the subject matter of this Agreement, including, without limitation, contract claims, tort claims, beach of duty claims and all other common law and statutory claims. Each party hereto acknowledges that this waiver is a material inducement to enter into a business relationship, that each has already relied on this waiver in entering into this Agreement, and that each shall continue to rely on this waiver in their related future dealings. Each party hereto further warrants and represents that it has reviewed this waiver with its legal counsel and that it knowingly and voluntarily waives its jury trial rights following consultation with such legal counsel. THIS WAIVER IS IRREVOCABLE, MEANING THAT IT MAY NOT BE MODIFIED EITHER ORALLY OR IN WRITING, AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS OR MODIFICATIONS TO THIS AGREEMENT. In the event of litigation, this Agreement may be filed as a written consent to a trial by the court. 28 IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the day and year first above written. WITNESS: MANAGING GENERAL PARTNER: ------------------------ BOSTON PROPERTIES LLC By: Boston Properties Limited Partnership, Managing Member By: Boston Properties, Inc., General Partner /s/ Eli Rubenstein By: /s/ Thomas J. O'Connor - ------------------------ ------------------------- Name: Thomas J. O'Connor Title: Vice President WITNESS: NON-MANAGING GENERAL PARTNERS: ----------------------------- BP EC4 HOLDINGS LLC By: Boston Properties Limited Partnership, Managing Member By: Boston Properties, Inc., General Partner /s/ Eli Rubenstein By: /s/ Thomas J. O'Connor - ------------------------ ------------------------- Name: Thomas J. O'Connor Title: Vice President WITNESS: THE PRUDENTIAL INSURANCE COMPANY OF AMERICA /s/ Eli Rubenstein By: /s/ Gary L. Frazier - ------------------------ ------------------------- Name: Gary L. Frazier Title: Vice President 29 SCHEDULE A ---------- ATTACHED TO AMENDED AND RESTATED PARTNERSHIP AGREEMENT OF FOUR EMBARCADERO CENTER VENTURE Managing General Partner ------------------------ Name and Address Percentage Interest - ---------------- ------------------- Boston Properties LLC 0.499798% c/o Boston Properties, Inc. 8 Arlington Street Boston, Massachusetts 02116 Non-Managing Partners --------------------- Name and Address Percentage Interest - ---------------- ------------------- BP EC4 Holdings LLC 49.479944% c/o Boston Properties, Inc. 8 Arlington Street Boston, Massachusetts 02116 The Prudential Insurance Company 50.020258 of America c/o Prudential Realty Group 8 Campus Drive 4th Floor - Arbor Circle South Parsippany, New Jersey 07054 Attention: John R. Triece Facsimile: (201) 683-1797 with copies to: Prudential Insurance Company of America O'Melveny & Myers 4 Embarcadero Center, Suite 2700 Embarcadero Center West San Francisco, CA 94111 275 Battery Street Attention: Harry Mixon San Francisco, CA 94111 Facsimile: (415) 956-2197 Attention: Stephen A. Cowan Facsimile: (415) 984-8701 EXHIBIT A --------- Legal Description of Four Embarcadero Center -------------------------------------------- [INTENTIONALLY OMITTED] EXHIBIT B --------- Approved Terms and Conditions of Loans from Managing General Partner The Partnership shall be permitted to borrow funds from the Managing General Partner from time to time, as determined in the sole discretion of the Managing General Partner, for the purpose of funding working capital, leasing commissions, tenant improvements, capital expenditures and other expenditures relating to the Property. Each such borrowing shall be in the form of an unsecured loan and shall be evidenced by a note issued by the Partnership to the Managing General Partner in the form of Exhibit A attached to this Exhibit B. --------- --------- Exhibit A [FORM OF BP NOTE] - --------- DELAYED DEMAND NOTE ------------------- $_____________________ San Francisco, California _____________, 19__ At any time after _________, 199_ [the date which is 120 days after the date of the Closing under the Master Transaction Agreement], FOR VALUE RECEIVED, FOUR EMBARCADERO CENTER VENTURE, a California general partnership with a principal place of business in San Francisco, California (the "Maker"), promises ----- to pay [BOSTON PROPERTIES LIMITED PARTNERSHIP, a Delaware limited partnership] [other BPLLC affiliate] with a principal place of business in Boston, Massachusetts, ON DEMAND, the principal sum of _____________________ ($__________), with interest thereon at the rate of ten percent (10%) per annum. Interest shall be computed on the number of days principal is outstanding based on a 365 day year. All interest accruing under this Note shall be due and payable (i) monthly in arrears on the fifth (5th) day of each succeeding calendar month, commencing ________, 199_ [fifth day of calendar month following month in which note is made] and continuing thereafter until all amounts due hereunder have been paid in full, or (ii) at the option of the holder, on demand at any time after __________, 199_ [the date which is 120 days after the date of the Closing under the Master Transaction Agreement]. The outstanding balance of principal due hereunder may be prepaid in full at any time, or from time to time in part in multiples of One Thousand Dollars ($1,000.00) without any prepayment premium. The Maker agrees to pay all charges of the holder hereof in connection with the collection and enforcement of this Note, including reasonable attorneys' fees and disbursements. The Maker hereby waives presentment, demand, notice, protest and all other suretyship defenses generally and agrees that any renewal, extension or postponement of the time of payment or any other indulgence, may be effected without notice to and without releasing the Maker from any liability hereunder. This Note shall have the effect of an instrument under seal. FOUR EMBARCADERO CENTER VENTURE By: Boston Properties LLC, its managing general partner By: Boston Properties Limited Partnership, its managing member By: Boston Properties, Inc., its general partner By:________________________ Name: Title: EXHIBIT C --------- DESCRIPTION OF EQUITY REDEMPTION LOAN ------------------------------------- The "Equity Redemption Loan" shall mean that certain loan to the Partnership in the aggregate principal amount of $92,119,000, which loan is made pursuant to a certain Term Loan Agreement dated as of November 12, 1998 by and among BankBoston, N.A., The Chase Manhattan Bank, Fleet National Bank, PNC Bank, National Association, Dresdner Bank AG New York Branch and Grand Cayman Branch, The Bank of New York, Key Bank National Association, Citizens Bank and other banks which may become parties thereto as the lenders thereunder, and One Embarcadero Center Venture, Embarcadero Center Associates, Three Embarcadero Center Venture and Four Embarcadero Center Venture, collectively as the borrowers thereunder, which Term Loan Agreement provides for loans to the borrowers in the aggregate principal amount of $328,143,000. The $92,119,000 loan to the Partnership under such Term Loan Agreement is evidenced by a promissory note of the Partnership in the form provided in such Term Loan Agreement. EXHIBIT D --------- DESCRIPTION OF PRUDENTIAL GUARANTIED LOAN ----------------------------------------- The "Prudential Guarantied Loan" shall mean that certain loan to the Partnership in the aggregate principal amount of $51,000,000, which loan is made pursuant to a certain Term Loan Agreement dated as of November 12, 1998 by and among The Chase Manhattan Bank as lender thereunder, and One Embarcadero Center Venture, Embarcadero Center Associates, Three Embarcadero Center Venture and Four Embarcadero Center Venture, collectively as the borrowers thereunder, which Term Loan Agreement provides for loans to the borrowers in the aggregate principal amount of $92,000,000. The $51,000,000 loan to the Partnership under such Term Loan Agreement is evidenced by a promissory note of the Partnership in the form provided in such Term Loan Agreement. EXHIBIT E --------- Description of Business Interruption and General Liability Insurance Business Interruption Insurance $145,000,000 Commercial General Liability $ 2,000,000 Umbrella Liability Program $200,000,000 EXHIBIT F --------- Description of Financing Plan for Four Embarcadero Center Venture 1. Equity Redemption Loan. Upon the execution of this Agreement, the ---------------------- Partnership will enter into a 90 day Term Loan Agreement with BankBoston, N.A., on behalf of itself and as agent for the several banks that are parties thereto, to borrow approximately $92,119,000 with a term of 90 days, which borrowing shall be guaranteed by Boston Properties Limited Partnership ("BPLP"). This ---- loan constitutes the Equity Redemption Loan. Interest on the outstanding indebtedness under the Equity Redemption Loan shall accrue at a rate equal to the 30 day Eurodollar rate plus 50 basis points. In addition, upon the closing of the Equity Redemption Loan, the Partnership will pay its proportionate share of the closing fee in the approximate aggregate amount of $116,000. The Partnership shall pledge the Investment Notes to secure obligations of the Partnership under the Equity Redemption Loan. 2. Prudential Guarantied Loan. Upon the execution of this Agreement, the -------------------------- Partnership will also enter into a Term Loan Agreement with The Chase Manhattan Bank, N.A. to borrow approximately $51,000,000 with a term of 90 days, which borrowing shall be guaranteed by The Prudential Insurance Company of America. This loan constitutes the Prudential Guarantied Loan. Interest on the outstanding indebtedness under the Prudential Guarantied Loan shall accrue at a rate equal to the 30 day Eurodollar rate plus 30 basis points. In addition, upon the closing of the Prudential Guarantied Loan, the Partnership will pay its proportionate share of the closing fee in the approximate aggregate amount of $40,000. 3. Advance Under BPLP Line of Credit. Upon the execution of this --------------------------------- Agreement, BPLP will amend its existing Amended and Restated Revolving Credit Agreement (the "Credit Agreement") with BankBoston, N.A., and certain other ---------------- banks for which BankBoston, N.A. serves as agent, to add, inter alia, the Partnership as a Borrower under the Credit Agreement for the purpose of the advance described in the next paragraph. The Equity Redemption Loan will, upon the earlier of the redemption of The Prudential Insurance Company of America from the Partnership or the 90th day after the date of execution of this Agreement, be repaid through (i) a draw on the Credit Agreement by the Partnership of approximately $66,000,000 and (ii) cash of the Partnership in an amount equal to approximately $26,600,000, which cash will represent proceeds from the repayment of the Special BP Loan. As a result of the draw under the Credit Agreement, the Partnership will be a primary obligor with respect to approximately $66,000,000 of indebtedness under the Credit Agreement. 4. Assumption and Release with respect to Prudential Guarantied Loan. ----------------------------------------------------------------- The Prudential Guarantied Loan will, upon the redemption of the interest of The Prudential Insurance Company of America in the Partnership, be assumed by The Prudential Insurance Company of America and the Partnership will be released as a borrower with respect to the Prudential Guarantied Loan and all other obligations with respect thereto, as contemplated by, and subject to the terms and conditions of, the Redemption Agreement. In the event that the interest of The Prudential Insurance Company of America in the Partnership is not redeemed by February 10, 1999, or in the event that the Partnership is not, by such date, released in full from all obligations with respect to the Prudential Guarantied Loan and related obligations, then either (i) Prudential shall continue to guaranty the Prudential Guarantied Loan until such redemption, assumption and release occurs or (ii) if the Partnership repays and refinances the Prudential Guarantied Loan by obtaining any replacement debt ("Replacement Debt"), Prudential shall guarantee the lenders thereof of the punctual payment in full and all other obligations of such Replacement Debt. 5. Secured Financing. Upon the execution of this Agreement, the ----------------- Partnership will enter into an Amendment and Restatement of an existing deed of trust loan by and between the Partnership and Northwestern Mutual Life Insurance Company (the "Lender") pursuant to which Note B of the existing loan with the Lender is being satisfied and the loan is being increased to a new original principal amount of $160 million.

 
                                                                   EXHIBIT 99.11



                      PRUDENTIAL REALTY SECURITIES, INC.
                                8 CAMPUS DRIVE
                         PARSIPPANY, NEW JERSEY 07054


                                        As of November 12, 1998



ONE EMBARCADERO CENTER VENTURE
C/O BOSTON PROPERTIES, INC.
8 ARLINGTON STREET
BOSTON, MASSACHUSETTS 02116-3495
ATTN: GENERAL COUNCIL

Ladies and Gentlemen:

     The undersigned, PRUDENTIAL REALTY SECURITIES, INC. (herein called the
"COMPANY"), hereby agrees with you as follows:

     1.   AUTHORIZATION OF ISSUE OF NOTES.  The Company will authorize the issue
of up to eight (8) of its senior promissory notes in the aggregate principal
amount of $88,200,000, to be dated the date of issue thereof, to mature in the
case of each Note so issued, subject to the terms and provisions of the next
sentence below, not more than 15 years after the date of original issuance
thereof as set forth in each such Note (the "MATURITY DATE") and listed on
Schedule 1 attached hereto, to bear interest on the unpaid balance thereof from
- ----------                                                                     
the date thereof until the Rate Reset Date or, if such Note does not have a Rate
Reset Date, the Maturity Date for each such Note at the rate per annum equal to
the Initial Treasury plus the Margin, and from the Rate Reset Date (if any) of
any such Note until the principal thereof shall have become due and payable at
the rate per annum equal to the Reset Treasury plus the Margin, and to have such
other particular terms, as shall be specified herein and therein, and to be
substantially in the form of Exhibit A attached hereto. Notwithstanding the
                             ---------                                     
foregoing, each Note shall either mature or have a Rate Reset Date within ten
(10) years after the date of original issuance of such Note.  The term "Notes"
as used herein shall include each such senior promissory note delivered pursuant
to any provision of this Agreement and each such senior promissory note
delivered in substitution or exchange for any other Note pursuant to any such
provision.

     2.   PURCHASE AND SALE OF NOTES.  The Company hereby agrees to sell to you
and, subject to the terms and conditions herein set forth, you agree to purchase
from the Company, Notes in the aggregate principal amount of $88,200,000 at 100%
of such aggregate principal amount.  The Company will deliver to you, at the
offices of O'Melveny 

                                       1

 
& Myers LLP at 275 Battery Street, Suite 2600, San Francisco, California, (or
such other location to be determined by mutual agreement between the Company and
you) one or more Notes registered in your name, evidencing the aggregate
principal amount of Notes to be purchased by you and in the denomination or
denominations specified in the Purchaser Schedule attached hereto, against
payment of the purchase price thereof by transfer of immediately available funds
for credit to the Company's account #890-0305-525 at The Bank of New York, New
York, New York, ABA No. 021-000-018 on the date of closing, which shall be
November 12, 1998 or any other date on or before November 13, 1998 upon which
the Company and you may mutually agree (herein called the "CLOSING" or the "DATE
OF CLOSING").

     3.   CONDITIONS OF CLOSING.  Your obligation to purchase and pay for the
Notes to be purchased by you hereunder is subject to the satisfaction, on or
before the date of closing, of the following conditions:

     3A.  EXECUTION AND DELIVERY OF DOCUMENTS.  The Company shall have
delivered, or cause to be delivered, to you duly executed, original or certified
copies of the following documents, each to be dated the date of closing unless
otherwise indicated:

     (i)   the Note(s), originally executed and in substantially the form of
     Exhibit A attached hereto.
     ---------                 

     (ii)  a favorable opinion of Deborah Shulevitz, Esq., counsel to the
     Company (or such other counsel designated by the Company and acceptable to
     you) satisfactory to you and substantially in the form of Exhibit B
                                                               ---------        
     attached hereto and as to such other matters as you may reasonably request.
     
    (iii)  the Certificate of Incorporation of the Company certified as of a
    date within 10 Business Days of closing by the Secretary of State of
    Delaware.

     (iv)  the Bylaws of the Company certified by the Secretary of the Company.

     (v)   an incumbency certificate signed by the Secretary or an Assistant
     Secretary of the Company certifying as to the names, titles and true
     signatures of the officers of the Company authorized to sign this Agreement
     and the Notes and the other documents to be delivered hereunder.

     (vi)  a certificate of the Secretary or an Assistant Secretary of the
     Company (A) attaching resolutions of the Board of Directors of the Company
     evidencing approval of the transactions contemplated by this Agreement and
     the issuance of the Notes and the execution, delivery and performance
     thereof, and authorizing certain officers to execute and deliver the same,
     and certifying that such resolutions were duly and validly adopted at a
     meeting duly noticed and held and such resolutions have not since been
     amended, revoked or rescinded, (B) certifying that no dissolution or
     liquidation proceedings as to the Company have been commenced or are

                                       2

 
     contemplated, and (C) identifying and attaching any proposed or effected
     amendments to or changes in the Certificate of Incorporation of the Company
     since the date of the certified copies thereof provided pursuant to clause
                                                                         ------
     (iii) above or, if none, so certifying.
     -----                                  

     (vii)  (A) the representations and warranties contained in paragraph 8
                                                                -----------
     shall be true on and as of the date of closing, except to the extent of
     changes caused by the transactions herein contemplated; (B) there shall
     exist on the date of closing no Event of Default or Default and no Event of
     Default or Default will occur by reason of or immediately following the
     sale of the Notes hereunder; (C) no condition, event or act that has had or
     would have a Material Adverse Effect has occurred since December 31, 1997,
     and (D) you shall have received an Officer's Certificate certifying as to
     all of the foregoing.

     (viii) a corporate good standing certificate as to the Company from the
     State of New Jersey.

     (xi)  additional documents or certificates with respect to such legal
     matters or corporate or other proceedings related to the transactions
     contemplated hereby as may be reasonably requested by you.

     3B.  PURCHASE PERMITTED BY APPLICABLE LAWS.  The purchase of and payment
for the Notes to be purchased by you on the date of closing on the terms and
conditions herein provided (including the use of the proceeds of such Notes by
the Company) shall not violate any applicable law or governmental regulation
(including, without limitation, Section 5 of the Securities Act or Regulation T,
U or X of the Board of Governors of the Federal Reserve System) and shall not
subject you to any tax, penalty, liability or other onerous condition under or
pursuant to any applicable law or governmental regulation, and you shall have
received such certificates or other evidence as you may request to establish
compliance with this condition.

     3C.  PROCEEDINGS.  All corporate and other proceedings taken or to be taken
in connection with the transactions contemplated hereby and all documents
incident thereto shall be satisfactory in substance and form to you, and you
shall have received all such counterpart originals or certified or other copies
of such documents as you may reasonably request.

     3D.  RATING.  The Company shall have obtained a rating of the Notes, as of
a date not more than 30 days prior to the closing hereof, of A or better from
S&P and the equivalent rating from Fitch and shall provide written evidence of
the same.

     3E.  PHASE ONE TRANSACTIONS.  Phase One of the transactions shall have been
completed or shall be consummated concurrently with the consummation of the
transactions described herein.

                                       3

 
     3F.  EQUITY REDEMPTION AND PRUDENTIAL GUARANTIED LOANS.  You shall have
obtained the Prudential Guarantied Loan and Equity Redemption Loan or the
closing of such loans shall occur concurrently with the closing of the
transactions contemplated herein; and the lenders of the Prudential Guarantied
Loan and Equity Redemption Loan shall have made available to you in full the
proceeds of the Prudential Guarantied Loan and Equity Redemption Loan.

     4.   PREPAYMENTS.  The Notes are not prepayable during the first year of
the term thereof.  The Notes shall be subject to prepayment, in whole or in part
at any time after the first anniversary date of this Agreement, at the option of
the Company, at 100% of the principal amount so prepaid plus accrued interest
thereon to the prepayment date and the Yield-Maintenance Amount, if any, under
the applicable Note with respect to the principal amount so prepaid; provided,
however, that any prepayment, whether in whole or in part, made on a Rate Reset
Date shall be payable without any Yield-Maintenance Amount.  If the Company
elects to prepay any of the Notes at any time while any BP Party holds any
Notes, the Company shall first offer to prepay all Notes then held by such BP
Party(ies) before offering to prepay any Notes held by any other Person.  Within
three (3) business days after delivery to it of any such offer of prepayment,
each such BP Party shall provide the Company written notice of its election to
either have such BP Party's Notes prepaid first or to have the Notes held by
other Persons prepaid prior to the Notes held by such BP Party; provided that,
                                                                -------- ---- 
notwithstanding the election of any such BP Party to have Notes held by other
Persons paid first, the Company may prepay any portion of such BP Party's Notes
once the Company has prepaid in full all Notes held by such other Persons.  The
failure of any BP Party to provide such notice to the Company within such three
(3) business day period shall be deemed an election to prepay such BP Party's
Notes first.

     5.   AFFIRMATIVE COVENANTS.

     5A.  FINANCIAL STATEMENTS.  The Company covenants that it will deliver to
each Significant Holder in duplicate:

          (i) as soon as practicable and in any event within 60 days after the
     end of each quarterly period (other than the last quarterly period) in each
     fiscal year, statements of income, cash flows and shareholders' equity of
     the Company for the period from the beginning of the current year to the
     end of such quarterly period, and a balance sheet of the Company as at the
     end of such quarterly period, setting forth in comparative form statements
     of income and cash flows for the corresponding period in the preceding
     year, all in reasonable detail and certified by an authorized financial
     officer of the Company, subject to changes resulting from year-end
     adjustments;

          (ii)  as soon as practicable and in any event within 120 days after
     the end of each fiscal year, statements of income, cash flows and
     shareholders' equity of the Company for such year, and a balance sheet of
     the Company as at the end of such year, all prepared in accordance with
     GAAP, setting forth in each case in comparative form corresponding
     consolidated figures from the preceding annual 

                                       4

 
     audit, all in reasonable detail and satisfactory in form to the Required
     Holder(s)' and reported on by a Big Five Accounting Firm selected by the
     Company whose report shall be without limitation as to the scope of the
     audit and reasonably satisfactory in substance to the Required Holder(s)
     and shall be certified by such Big Five Accounting Firm to its knowledge
     with its unqualified opinion;

          (iii) promptly upon transmission thereof, copies of all such financial
     statements, proxy statements, notices and reports as it shall send to its
     stockholders;

          (iv) promptly upon receipt thereof, a copy of each other report or
     management letter submitted to the Company by its independent public
     accountants in connection with any annual, interim or special audit made by
     them of the books of the Company;

           (v) such other financial data and other information as the Company
     regularly provides to its other lenders, other holders of Debt or other
     creditors; and

          (vi) with reasonable promptness, such other information and documents
     as such Significant Holder may reasonably request.

Together with each delivery of financial statements required by clauses (i) and
                                                                -----------    
(ii) above, the Company will deliver to each Significant Holder an Officer's
- ----                                                                        
Certificate demonstrating (with computations in reasonable detail) compliance by
the Company and its Subsidiaries with the provisions of paragraph 6A and stating
                                                        ------------            
that there exists no Event of Default or Default, or, if any Event of Default or
Default exists, specifying the nature and period of existence thereof and what
action the Company proposes to take with respect thereto.  Together with each
delivery of financial statements required by clause (ii) above, the Company will
                                             -----------                        
deliver to each Significant Holder a certificate of such accountants stating
that, in making the audit necessary for their report on such financial
statements, they have obtained no knowledge of any Event of Default or Default,
or, if they have obtained knowledge of any Event of Default or Default,
specifying the nature and period of existence thereof.  Such accountants,
however, shall not be liable to anyone by reason of their failure to obtain
knowledge of any Event of Default or Default which would not be disclosed in the
course of an audit conducted in accordance with generally accepted auditing
standards.

     The Company also covenants that promptly after any Responsible Officer
obtains knowledge of an Event of Default or Default, it will deliver to each
Significant Holder an Officer's Certificate specifying the nature and period of
existence thereof and what action the Company has taken, is taking or proposes
to take with respect thereto.

     5B.  INSPECTION OF BOOKS AND RECORDS.  The Company covenants that it will
permit any Person designated by any Significant Holder in writing, at such
Significant Holder's expense, to visit the Company's place of business to
examine the corporate books and financial records of the Company and make copies
thereof or extracts therefrom and to 

                                       5

 
discuss the affairs, finances and accounts of the Company with the principal
officers thereof and its independent public accountants, all at such reasonable
times and as often as such Significant Holder may reasonably request; provided,
                                                                      --------
however that disclosure of any confidential or material non-public information
of the Company requested by such Person may be reasonably conditioned on such
Person's execution and delivery of a confidentiality agreement in form and
substance acceptable to Company.

     5C.  COVENANT TO SECURE NOTE EQUALLY.  The Company covenants that if it
shall create or assume any Lien upon any of its property or assets, whether now
owned or hereafter acquired, other than Liens permitted by the provisions of
paragraph 6C(1) (unless prior written consent to the creation or assumption
- ---------------                                                            
thereof shall have been obtained pursuant to paragraph 11C), it will make or
                                             -------------                  
cause to be made effective provision whereby the Notes will be secured by such
Lien equally and ratably with any and all other Debt thereby secured so long as
any such other Debt shall be so secured; provided that the creation and
                                         --------                      
maintenance of such equal and ratable Lien shall not in any way limit or modify
the right of the holders of the Notes to enforce the provisions of paragraph
                                                                   ---------
6C(1).
- ----- 

     5D.  COMPLIANCE WITH LAWS.  The Company covenants that it and all of its
properties and facilities will comply at all times in all material respects with
all federal, state, local and regional statutes, laws, ordinances and judicial
or administrative orders, judgments, rulings and regulations, including those
relating to protection of the environment except, in any such case, where
failure to comply would not result in a Material Adverse Effect on the business,
condition (financial or otherwise) or operations of the Company.

     5E.  PAYMENT OF TAXES.  The Company covenants that it will file or cause to
be filed all federal, state and other income tax returns which, to the knowledge
of the officers of the Company, are required to be filed, and will pay all taxes
as shown on such returns and on all assessments received by it to the extent
that such taxes become due, except such taxes as are subject to a Good Faith
Contest.

     5F.  ENFORCEMENT OF MORTGAGE PROVISIONS.  The Company covenants that it
shall require any Commercial Mortgage Loans originated or acquired by it to
contain covenants to the effect that (1) the mortgagor shall obtain and maintain
at all times appropriate insurance coverage with respect to the mortgaged
property and (2) the mortgagor shall promptly pay and discharge any indebtedness
or lawful claims against the mortgaged property which if unpaid would constitute
a Lien on such property.  The Company further covenants and agrees that it will
use commercially reasonable efforts to enforce such covenants.

     6.   NEGATIVE COVENANTS.  So long as any Note or amount owing under this
Agreement shall remain unpaid, the Company covenants that:

          6A(1). DEBT SERVICE COVERAGE RATIO.  The Company will not, at any
time, permit the Debt Service Coverage Ratio to be less than 1.4 to 1.

                                       6

 
          6A(2). DEBT TO TOTAL ASSETS RATIO.  The Company will not permit the
ratio of (i) Debt to (ii) the sum of Total Assets plus the cumulative
depreciation of any real property assets of the Company to exceed .70 to 1.

     6B.  RESTRICTED PAYMENTS.  The Company covenants that it will not make, pay
or declare, or commit to make, pay or declare, any Restricted Payment unless,
after giving effect thereto, (i) the aggregate amount of all Restricted Payments
made during the twelve month period commencing on the date hereof and expiring
on the one (1) year anniversary of the date hereof, and including all previously
made Restricted Payments, does not exceed 100% of the lesser of (A) Net Income
and (B) Net Income (determined without giving effect to any current income taxes
or any change in deferred taxes), in each case, for all such fiscal quarters
during such time period on a cumulative basis, and (ii) the aggregate amount of
all Restricted Payments made during any fiscal quarter after the expiration of
such twelve (12) month period, and including all previously made Restricted
Payments, does not exceed 105% of the lesser of (C) Net Income and (D) Net
Income (determined without giving effect to any current income taxes or any
change in deferred taxes), in each case, for all such fiscal quarters on a
cumulative basis, and (iii) no Default or Event of Default exists or would exist
after giving effect to such Restricted Payment.

          6C.  LIENS, DEBT, AND OTHER RESTRICTIONS.  The Company will not:

          6C(1).  LIENS.  Create, assume or suffer to exist any Lien upon any of
     its properties or assets, whether now owned or hereafter acquired, or any
     income, participation, royalty or profits therefrom (whether or not
     provision is made for the equal and ratable securing of the Notes in
     accordance with the provisions of paragraph 5C), except for the Liens
                                       ------------   ------              
     specified in clauses (i) through (xi) below (collectively, "PERMITTED
                  -----------         ----                                
     LIENS");

          (i)  Liens for taxes, assessments or other governmental levies or
     charges not yet due or which are subject to a Good Faith Contest;

          (ii) statutory Liens of landlords and Liens of carriers, contractors,
     warehousemen, mechanics and materialmen incurred in the ordinary course of
     business for sums not yet due or which are subject to a Good Faith Contest;

          (iii) Liens (other than any Lien imposed by the Employee Retirement
     Income Security Act of 1974, as amended ("ERISA")) incurred, or deposits
     made, in the ordinary course of business (A) in connection with workers'
     compensation, unemployment insurance, old age benefit and other types of
     social security, (B) to secure (or to obtain letters of credit that secure)
     the performance of tenders, statutory obligations, surety and appeal bonds,
     bids, leases, performance bonds, purchase, construction, government or
     sales contracts and other similar obligations or (C) otherwise to satisfy
     statutory or legal obligations; provided, that in each such case such Liens
                                     --------                                   
     (1) were not incurred or made in connection with the incurrence or
     maintenance of Indebtedness, the borrowing of money, the obtaining of
     advances or 

                                       7

 
     credit, and (2) do not in the aggregate materially detract from the value
     of the property or assets so encumbered or materially impair the use
     thereof in the operation of its business;

          (iv)  Liens existing (A) prior to the time of acquisition upon any
     property acquired by the Company through purchase, merger or consolidation
     or otherwise, whether or not expressly assumed by the Company, or (B)
     placed on property at the time of acquisition by the Company or to secure
     all or a portion of (or to secure Debt incurred to pay all or a portion of)
     the purchase price thereof; provided that such Lien shall not have been
                                 --------                                   
     created, incurred or assumed in contemplation of such purchase, merger,
     consolidation or other event;

          (v)  Liens now or hereafter required by this Agreement;

          (vi)  Liens in existence on the date hereof as set forth on Schedule
                                                                      --------
     6C(1) hereto;
     -----        

          (vii)  leases, subleases, licenses and sublicenses granted to third
     parties not interfering in any material respect with the business of the
     Company;

          (viii) minor survey exceptions or minor encumbrances, easements or
     reservations, or rights of others for rights-of-way, utilities and other
     similar purposes, or zoning or other restrictions as to use of real
     property, that are necessary for the conduct of the operations of the
     Company or that customarily exist on properties of corporations engaged in
     similar businesses and are similarly situated and that do not in any event
     materially impair their use in the operations of the Company;

          (ix)  any attachment or judgment Lien, unless the judgment it secures
     shall not, within 60 days after the entry thereof, have been discharged or
     execution thereof stayed pending appeal, or shall not have been discharged
     within 60 days after the expiration of any such stay; provided the
                                                           --------    
     aggregate amount of such attachment or judgment Liens shall not secure
     obligations in excess of $10,000,000 at any time;

          (x)  Liens other than those described in clauses (i) through (ix)
                                                   -----------         ----
     above that secure Debt permitted by clauses (i) and (ii) of paragraph
                                         -----------     ----    ---------
     6C(2); provided that no Default or Event of Default shall exist and be
            --------                                                       
     continuing or shall result therefrom; or

          (xi)  any Lien renewing, extending or refunding any Lien permitted by
                                                                               
     clause (x) above.
     ----------       

          6C(2).  DEBT.  Create, incur, assume or in any other way become liable
     in respect of any Debt, except
                             ------

               (i) the Notes;

                                       8

 
               (ii) Funded Debt of the Company described in Schedule 6C(2) and
                                                            --------------    
          outstanding as of the date hereof; and

               (iii) additional Funded Debt of the Company in an amount, which
          when added to all other Funded Debt of the Company then outstanding
          (but excluding the Funded Debt evidenced by the Notes and the Other EC
          Notes), does not exceed $1,000,000,000 at any one time outstanding.

          6C(3).  LOANS, ADVANCES, INVESTMENTS AND CONTINGENT LIABILITIES.  Make
     or permit to remain outstanding any loan or advance to, or extend credit
     other than credit extended in the normal course of business to any Person
     who is not an Affiliate of the Company to, or Guarantee, directly or
     indirectly, in connection with the obligations, stock or dividends of, or
     own, purchase or acquire any stock, obligations or securities of, or any
     other interest in, or make any capital contribution to, any Person, or
     commit to do any of the foregoing, (all of the foregoing collectively being
     "INVESTMENTS"), except for the Investments set forth in clauses (i) through
                     ------                                  -----------        
     (ix) below (collectively, "PERMITTED INVESTMENTS"):
     ----                                               

          (i)  obligations backed by the full faith and credit of the United
     States Government (whether issued by the United States Government or an
     agency thereof), and obligations guaranteed by the United States
     Government, in each case which mature within one year from the date
     acquired;

          (ii)  demand and time deposits with, Eurodollar deposits with or
     certificates of deposit issued by any commercial bank or trust company (1)
     organized under the laws of the United States or any of its states or
     having branch offices therein, (2) having equity capital in excess of
     $100,000,000 and (3) which issues either (x) senior debt securities rated A
     or better by S&P, A or better by Moody's or (y) commercial paper rated A-2
     or better by S&P or Prime-2 or better by Moody's (or, in either case, an
     equivalent rating from another nationally recognized credit rating agency)
     ("RATED BANKS"), in each case payable in the United States in United States
     dollars and in each case which mature within one year from the date
     acquired;

          (iii) marketable commercial paper and loan participations rated A-1 or
     better by S&P or P-1 or better by Moody's (or, in either case, an
     equivalent rating from another nationally recognized credit rating agency)
     and maturing not more than 270 days from the date acquired;

          (iv)  bonds, debentures, notes or similar debt instruments issued by a
     state or municipality given a "AA" rating or better by S&P or an equivalent
     rating by another nationally recognized credit rating agency and maturing
     not more than one year from the date acquired;

          (v) the loans, investments and advances existing as of the date hereof
     and listed on Schedule 6C(3) hereto;
                   --------------        

                                       9

 
          (vi) repurchase agreements and similar commercial undertakings for
     terms of less than one year with any Rated Bank, provided that such
                                                      --------          
     repurchase agreements or undertakings are secured and collateralized by
     obligations backed by the full faith and credit of the United States
     Government in aggregate face amount equal to or greater than the
     obligations so secured;

          (vii)   money market mutual funds that (A) are denominated in U.S.
     Dollars, (B) have average asset maturities not in excess of 365 days, (C)
     have total invested assets in excess of $1,000,000,000 and (D) invest
     exclusively in Permitted Investments other than those described in Clause
                                                                        ------
     (ix) below, or are rated at least BBB- by S&P;
     ----                                          

          (viii)  bonds, debentures, notes or similar debt instruments issued by
     a corporation organized and existing under the laws of any state of the
     United States of America or the District of Columbia and having a long term
     credit rating of BBB-or better from S&P or Baa3 or better from Moody's; and

          (ix)     Commercial Mortgage Loans and ABS originated, purchased or
     acquired by the Company in the ordinary course of its business, provided
     that any such Commercial Mortgage Loan or ABS shall comply with the
     investment guidelines set forth on Exhibit C hereto at the time of
                                        ---------                      
     origination, purchase, or acquisition by the Company; and further provided,
     that at all times the Company's portfolio of Investments, taken as a whole,
     shall be in compliance with such investment guidelines.

          6C(4).  MERGER AND CONSOLIDATION.  Merge or consolidate with any other
     Person, except that the Company may consolidate or merge with any other
     corporation if (A) the Company shall be the continuing or surviving
     corporation and (B) no Default or Event of Default exists or would exist
     after giving effect to such merger or consolidation.

          6C(5).  TRANSFER OF ASSETS.  Transfer, or agree or otherwise commit to
     Transfer, a substantial portion of its assets.

          6C(6)  ISSUANCE OF ADDITIONAL UNSECURED NOTES.  Issue any unsecured
     notes of the Company which are rated lower than the rating of the Notes on
     the date hereof.

          7.  EVENTS OF DEFAULT.

          7A.  ACCELERATION.  If any of the following events shall occur and be
     continuing for any reason whatsoever (and whether such occurrence shall be
     voluntary or involuntary or come about or be effected by operation of law
     or otherwise):

                                       10

 
               (i)    the Company defaults in the payment of any principal of or
          Yield-Maintenance Amount payable with respect to any Note when the
          same shall become due, either by the terms thereof or otherwise as
          herein provided; or

               (ii)   the Company defaults in the payment of any interest on any
          Note for more than 10 days after the date due; or

               (iii)  the Company defaults (whether as primary obligor or as
          guarantor or other surety) in any payment of principal of or interest
          on any other Debt (other than secured Debt which is non-recourse to
          the Company) beyond any period of grace provided with respect thereto,
          or the Company fails to perform or observe any other agreement, term
          or condition contained in any agreement under which any such Debt is
          created (or if any other event thereunder or under any such agreement
          shall occur and be continuing) and the effect of such failure or other
          event is to cause, or to permit the holder or holders of such (or a
          trustee on behalf of such holder or holders) to cause, such Debt to
          become due (or to be repurchased by the Company) prior to any stated
          maturity, provided that the aggregate amount of all Debt as to which
          such a payment default shall occur and be continuing or such a failure
          or other event causing or permitting acceleration (or resale to the
          Company) shall occur and be continuing exceeds an amount equal to the
          lesser of (x) $10,000,000 and (y) 5% of the net assets of the Company
          as reflected on its most recent balance sheet at the time of
          determination; or

               (iv)  any representation or warranty made by or on behalf of the
          Company or any of its officers herein or in any other writing
          furnished in connection with or pursuant to this Agreement or the
          transactions contemplated hereby shall be false in any material
          respect on the date as of which made; or

               (v)   the Company fails to perform or observe any agreement con
          tained in paragraph 6; or
                    -----------    

               (vi)  the Company fails to perform or observe any other
          agreement, term or condition contained herein and such failure shall
          not be remedied within 30 days after the Company receives written
          notice of such default from any holder of a Note; or

               (vii)  the Company makes an assignment for the benefit of
          creditors or is generally not paying its debts as such debts become
          due; or

               (viii)  any decree or order for relief in respect of the Company
          is entered under any bankruptcy, reorganization, compromise,
          arrangement, insolvency, readjustment of debt, dissolution or
          liquidation or similar law, 

                                       11

 
          whether now or hereafter in effect (herein called the "BANKRUPTCY
          LAW"), of any jurisdiction; or

               (ix)  the Company petitions or applies to any tribunal for, or
          consents to, the appointment of, or taking possession by, a trustee,
          receiver, custodian, liquidator or similar official of the Company, or
          of any substantial part of the assets of the Company, or commences a
          voluntary case under the Bankruptcy Law of the United States or any
          proceedings relating to the Company under the Bankruptcy Law of any
          other jurisdiction; or

               (x)   any such petition or application is filed, or any such
          proceedings are commenced, against the Company and the Company by any
          act indicates its approval thereof, consent thereto or acquiescence
          therein, or an order, judgment or decree is entered appointing any
          such trustee, receiver, custodian, liquidator or similar official, or
          approving the petition in any such proceedings, and such order,
          judgment or decree remains unstayed and in effect for more than 60
          days; or

               (xi)  any order, judgment or decree is entered in any proceedings
          decreeing the dissolution of the Company and such order, judgment or
          decree remains unstayed and in effect for more than 60 days; or

               (xii) one or more final judgments in an aggregate amount in
          excess of $10,000,000 is rendered against the Company and, within 60
          days after entry thereof, a solvent insurance carrier or carriers have
          not confirmed in writing that each such judgment is fully insured or
          any such judgment is not discharged or execution thereof stayed
          pending appeal, or within 60 days after the expiration of any such
          stay, any such judgment is not discharged;

     then (a) if such event is an Event of Default specified in clauses (i) or
                                                                -----------   
     (ii) of this paragraph 7A, the holder of any Note (other than the Company
     ----         ------------                                                
     or any of its Affiliates) may at its option during the continuance of such
     Event of Default, by notice in writing to the Company, declare such Note to
     be, and such Note shall thereupon be and become, immediately due and
     payable at par, together with interest accrued thereon, without
     presentment, demand, protest or other notice of any kind, all of which are
     hereby waived by the Company, (b) if such event is an Event of Default
     specified in clause (viii), (ix) or (x) of this paragraph 7A, all of the
                  -------------  ----    ---         ------------            
     Notes at the time outstanding shall automatically become immediately due
     and payable, together with interest accrued thereon and the Yield-
     Maintenance Amount, if any and to the extent permitted by law, with respect
     to each Note, without presentment, demand, protest or notice of any kind,
     all of which are hereby waived by the Company, and (c) with respect to any
     other event constituting an Event of Default, the Required Holder(s) may,
     at its or their option, by notice in writing to the Company, declare all of
     the Notes to be, and all of the Notes shall thereupon be and become,
     immediately due and payable together with interest accrued thereon and

                                       12

 
     together with the Yield-Maintenance Amount, if any, with respect to each
     Note, without presentment, demand, protest or other notice of any kind, all
     of which are hereby waived by the Company (provided that, so long as any BP
                                                -------- ----                   
     Party holds any Note(s), such BP Party may declare its Note(s) to be
     immediately due and payable with respect to any such other event
     constituting an Event of Default without the consent or approval of the
     other Holders).

          The Company acknowledges, and the parties hereto agree, that each
     holder of a Note has the right to maintain its investment in the Notes free
     from repayment by the Company (except as herein specifically provided for)
     and that the provision for payment of the Yield-Maintenance Amount by the
     Company in the event that the Notes are prepaid or are accelerated as a
     result of an Event of Default, is intended to provide compensation for the
     deprivation of such right under such circumstances.

          7B.  RESCISSION OF ACCELERATION.  At any time after any or all of the
     Notes shall have been declared immediately due and payable pursuant to
                                                                           
     paragraph 7A, the Required Holder(s) may, by notice in writing to the
     ------------                                                         
     Company, rescind and annul such declaration and its consequences if (i) the
     Company shall have paid all overdue interest on the Notes, the principal of
     and Yield-Maintenance Amount, if any, payable with respect to any Notes
     which have become due otherwise than by reason of such declaration, and
     interest on such overdue interest and overdue principal and Yield-
     Maintenance Amount at the applicable rate specified in the Notes, (ii) the
     Company shall not have paid any amounts which have become due solely by
     reason of such declaration, (iii) all Events of Default and Defaults, other
     than non-payment of amounts which have become due solely by reason of such
     declaration, shall have been cured or waived pursuant to paragraph 11C, and
                                                              -------------     
     (iv) no judgment or decree shall have been entered for the payment of any
     amounts due pursuant to the Notes or this Agreement.  Notwithstanding the
     foregoing, so long as any BP Holder holds any Note(s), only such BP Holder
     shall be permitted to rescind and annul any such declaration with respect
     to the Note(s) that it holds.  No such rescission or annulment shall extend
     to or affect any subsequent Event of Default or Default or impair any right
     arising therefrom.

          7C.  NOTICE OF ACCELERATION OR RESCISSION.  Whenever any Note shall be
     declared immediately due and payable pursuant to paragraph 7A or any such
                                                      ------------            
     declaration shall be rescinded and annulled pursuant to paragraph 7B, the
                                                             ------------     
     Company shall forthwith give written notice thereof to the holder of each
     Note at the time outstanding.

          7D.  OTHER REMEDIES.  If any Event of Default shall occur and be
     continuing, the holder of any Note may proceed to protect and enforce its
     rights under this Agreement and such Note by exercising such remedies as
     are available to such holder in respect thereof under applicable law,
     either by suit in equity or by action at law, or both, whether for specific
     performance of any covenant or other agreement contained in this Agreement
     or in aid of the exercise of any power granted 

                                       13

 
     in this Agreement. No remedy conferred in this Agreement upon the holder of
     any Note is intended to be exclusive of any other remedy, and each and
     every such remedy shall be cumulative and shall be in addition to every
     other remedy conferred herein or now or hereafter existing at law or in
     equity or by statute or otherwise.

          8.  REPRESENTATIONS, COVENANTS AND WARRANTIES. 
     The Company represents, covenants and warrants as follows:

          8A.  ORGANIZATION.  The Company is a corporation duly organized and
     existing in good standing under the laws of the State of Delaware, and is
     duly qualified as a foreign corporation and is in good standing in each
     jurisdiction in which such qualification is required by law, other than
     those jurisdictions as to which the failure to be so qualified or in good
     standing would not, individually or in the aggregate, reasonably be
     expected to have a Material Adverse Effect.  The Company has the corporate
     power and authority to own or hold under lease the properties it purports
     to own or hold under lease, to transact the business it transacts and
     proposes to transact, to execute and deliver this Agreement and the Notes
     and to perform the provisions hereof and thereof.  The Company has no
     Subsidiaries.

          8B.  FINANCIAL STATEMENTS.  The Company has furnished you with the
     unaudited financial statements, certified by a principal financial officer
     of the Company:  a balance sheet of the Company as of June 30, 1998 and
     statements of income, stockholders' equity and cash flows for the six-month
     period ended on such date, prepared by the Company.  To the Company's
     knowledge, such financial statements are true and correct in all material
     respects (subject, as to interim statements, to changes resulting from
     audits and year-end adjustments), have been prepared in accordance with
     GAAP consistently followed throughout the periods involved and show all
     liabilities, direct and contingent, of the Company required to be shown in
     accordance with such principles.  To the Company's knowledge, the balance
     sheets fairly present the condition of the Company as at the dates thereof,
     and the statements of income, stockholders' equity and cash flows fairly
     present the results of the operations of the Company and its cash flows for
     the periods indicated. To the knowledge of the Company, there has been no
     material adverse change in the business, condition (financial or otherwise)
     or operations of the Company since June 30, 1998.

          8C.  ACTIONS PENDING.  There is no action, suit, investigation or pro
     ceeding pending or, to the knowledge of the Company, threatened against the
     Company, or any properties or rights of the Company, by or before any
     court, arbitrator or administrative or governmental body which (i) might
     result in a Material Adverse Effect or (ii) purports to affect the validity
     or enforceability of this Agreement, any Note issued hereunder or the
     transactions contemplated hereby.

          8D.  TAXES.  The Company has filed all federal, state and other income
     tax returns which, to the knowledge of the officers of the Company, are
     required to be 

                                       14

 
     filed, and has paid all taxes as shown on such returns and on all
     assessments received by it to the extent that such taxes have become due,
     except such taxes as are subject to a Good Faith Contest.

          8E.  CONFLICTING AGREEMENTS AND OTHER MATTERS.  The Company is not a
     party to any contract or agreement or subject to any charter or other
     corporate restriction which materially and adversely affects its business,
     property or assets, or financial condition.  Neither the execution nor
     delivery of this Agreement or the Notes, nor the offering, issuance and
     sale of the Notes, nor fulfillment of nor compliance with the terms and
     provisions hereof and of the Notes will materially conflict with, or result
     in a material breach of the terms, conditions or provisions of, or
     constitute a default under, or result in any material violation of, or
     result in the creation of any Lien upon any of the properties or assets of
     the Company pursuant to, the charter or by-laws of the Company, any award
     of any arbitrator or any agree  ment (including any agreement with
     stockholders), instrument, order, judgment, decree, statute, law, rule or
     regulation to which the Company is subject.  Except as set forth in
     Schedule 8E attached hereto, the Company is not a party to, or otherwise
     -----------                                                             
     subject to any provision contained in, any instrument evidencing
     Indebtedness of the Company, any agreement relating thereto or any other
     contract or agreement (including its charter) which limits the amount of,
     or otherwise imposes restrictions on the incurring of, Debt of the Company
     of the type to be evidenced by the Notes.

          8F.  OFFERING OF NOTES.  Neither the Company nor any agent acting on
     its behalf has, directly or indirectly, offered the Notes or any similar
     security of the Company for sale to, or solicited any offers to buy the
     Notes or any similar security of the Company from, or otherwise approached
     or negotiated with respect thereto with, any Person other than
     Institutional Investors, and neither the Company nor any agent acting on
     its behalf has taken or will take any action which would subject the
     issuance or sale of the Notes to the provisions of section 5 of the
     Securities Act or to the provisions of any securities or Blue Sky law of
     any applicable  jurisdiction.

          8G.  USE OF PROCEEDS.  The Company does not own or have any present
     intention of acquiring any "margin stock" as defined in Regulation U (12
     CFR Part 207) of the Board of Governors of the Federal Reserve System
     (herein called "MARGIN STOCK").  The proceeds of sale of the Notes will be
     used to purchase Commercial Mortgage Loans and/or marketable debt
     securities, including, but not limited to, ABS.  None of such proceeds will
     be used, directly or indirectly, for the purpose, whether immediate,
     incidental or ultimate, of purchasing or carrying any margin stock or for
     the purpose of maintaining, reducing or retiring any Indebtedness which was
     originally incurred to purchase or carry any stock that is currently a
     margin stock or for any other purpose which might constitute this
     transaction a "purpose credit" within the meaning of such Regulation U.
     Neither the Company nor any agent acting on its behalf has taken or will
     take any action which might cause this Agreement or the Notes to violate
     Regulation U, Regulation T or any other 

                                       15

 
     regulation of the Board of Governors of the Federal Reserve System or to
     violate the Exchange Act, in each case as in effect now or as the same may
     hereafter be in effect.

          8H.  ERISA.  The Company has no retirement or employee benefit plans
     subject to ERISA.

          8I.  GOVERNMENTAL CONSENT.  No circumstance in connection with the
     offering, issuance, sale or delivery of the Notes is such as to require any
     authorization, consent, approval, exemption or other action by or notice to
     or filing with any court or administrative or governmental body in
     connection with the execution and delivery of this Agreement, the offering,
     issuance, sale or delivery of the Notes or fulfillment of or compliance
     with the terms and provisions hereof or of the Notes, if the failure to
     obtain any such consent would have a Material Adverse Effect.

          8J.  COMPLIANCE WITH LAWS.  The Company and all of its properties and
     facilities have complied at all times in all material respects with all
     federal, state, local and regional statutes, laws, ordinances and judicial
     or administrative orders, judgments, rulings and regulations, except, in
     any such case, where failure to comply would not result in a Material
     Adverse Effect on the business, condition (financial or otherwise) or
     operations of the Company.

          8K.  INVESTMENT COMPANY STATUS.  Neither the Company nor any
     Subsidiary is an "investment company" or a company "controlled" by an
     "investment company" within the meaning of the Investment Company Act of
     1940, as amended, or an "investment adviser" within the meaning of the
     Investment Advisers Act of 1940, as amended.

          8L.  DUE AUTHORIZATION, ETC.  This Agreement and the Notes have been
     duly authorized by all necessary corporate action on the part of the
     Company, and this Agreement constitutes, and upon execution and delivery
     thereof each Note will constitute, a legal, valid and binding obligation of
     the Company enforceable against the Company in accordance with its terms,
     except as such enforceability may be limited by (i) applicable bankruptcy,
     insolvency, reorganization, moratorium or other similar laws affecting the
     enforcement of creditors' rights generally and (ii) general principles of
     equity (regardless of whether such enforceability is considered in a
     proceeding in equity or at law).

          8M.  DISCLOSURE.  Neither this Agreement nor any other document,
     certificate or statement furnished to you by or on behalf of the Company in
     connection herewith contains any untrue statement of a material fact or
     omits to state a material fact necessary in order to make the statements
     contained herein and therein not misleading.  There is no fact peculiar to
     the Company which materially adversely affects or in the future may (so far
     as the Company can now foresee) materially adversely affect the business,
     property or assets, or financial condition of the 

                                       16

 
     Company and which has not been set forth in this Agreement or in the other
     docu ments, certificates and written statements furnished to you and Boston
     Properties Limited Partnership, a Delaware limited partnership by or on
     behalf of the Company prior to the date hereof in connection with the
     transactions contemplated hereby.

          8N.   INVESTMENTS.  All mortgage loans owned by the Company as of the
     date of this Agreement are Commercial Mortgage Loans which are not in
     default beyond any applicable cure periods pursuant to the terms thereof,
     and the Company has not extended any of the cure periods provided in the
     loan documents governing, evidencing and securing such Commercial Mortgage
     Loans and originally executed in connection therewith beyond the applicable
     cure periods provided in such loan documents.

          8O.   ENVIRONMENTAL MATTERS.  Except as disclosed on Schedule 8O
                                                               -----------
     hereto, the Company (i) has complied in all material respects with all
     applicable Environmental Laws, and the Company has not received (A) notice
     of any material failure so to comply, (B) any letter or request for
     information under Section 104 of CERCLA or comparable state laws or (C) any
     information that would lead it to believe that it is the subject of any
     federal, state or local investigation concerning Environmental Laws; (ii)
     does not manage, generate, transport, discharge or store any Hazardous
     Material in material violation of any material Environmental Laws; (iii)
     does not own, operate or maintain any underground storage tanks; and (iv)
     is not aware of any conditions or circumstances associated with its
     currently or previously owned or leased properties or operations (or those
     of any tenants of such properties) which may give rise to any liabilities
     under Environmental Laws which could have a Material Adverse Effect.

          9.    REPRESENTATIONS OF THE PURCHASER. You represent that you are not
     acquiring the Notes to be purchased by you hereunder with a view to or for
     sale in connection with any distribution thereof within the meaning of the
     Securities Act, provided that the disposition of your property shall at all
     times be and remain within your control. You understand that the Notes have
     not been registered under the Securities Act and may be resold only if
     registered pursuant to the provisions of the Securities Act or if an
     exemption from registration is available, except under circumstances where
     neither such registration nor such an exemption is required by law, and
     that the Company is not required to register the Notes.

          10.   DEFINITIONS; ACCOUNTING MATTERS.  For the purpose of this
     Agreement, the terms defined in paragraphs 10A and 10B (or within the text
                                     --------------     ---                    
     of any other paragraph) shall have the respective meanings specified
     therein and all accounting matters shall be subject to determination as
     provided in paragraph 10C.
                 ------------- 

          10A.  YIELD-MAINTENANCE TERMS.

                                       17

 
               "BUSINESS DAY" shall mean any day other than a Saturday, a Sunday
     or a day on which commercial banks in New York City are required or
     authorized to be closed.

               "CALLED PRINCIPAL" shall mean, with respect to any Note, the
     princi pal of such Note that is to be prepaid pursuant to paragraph 4 or is
                                                               -----------      
     declared to be immediately due and payable pursuant to paragraph 7A, as the
                                                            ------------        
     context requires.

               "DISCOUNTED VALUE" shall mean, with respect to the Called
     Principal of any Note, the amount obtained by discounting all Remaining
     Scheduled Payments with respect to such Called Principal from their
     respective scheduled due dates to the Settlement Date with respect to such
     Called Principal, in accordance with accepted financial practice and at a
     discount factor (as converted to reflect the periodic basis on which
     interest on the Notes is payable, if interest is payable other than on a
     semi-annual basis) equal to the Reinvestment Yield with respect to such
     Called Principal.

               "REINVESTMENT YIELD" shall mean, with respect to the Called
     Princi pal of any Note, the offered-side yield to maturity, as of 10:00
     a.m. (New York City time) on the Business Day next preceding the Settlement
     Date with respect to such Called Principal, of the U.S. Treasury security
     that was used to determine the then Treasury of such Investment Note.

               "REMAINING AVERAGE LIFE" shall mean, with respect to the Called
     Principal of any Note, the number of years (calculated to the nearest one-
     twelfth year) obtained by dividing (i) such Called Principal into (ii) the
     sum of the products obtained by multiplying (a) each Remaining Scheduled
     Payment of such Called Principal (but not of interest thereon) by (b) the
     number of years (calculated to the nearest one-twelfth year) which will
     elapse between the Settlement Date with respect to such Called Principal
     and the scheduled due date of such Remaining Scheduled Payment.

               "REMAINING SCHEDULED PAYMENTS" shall mean, with respect to the
     Called Principal of any Note, all payments of such Called Principal and
     interest thereon that would be due on or after the Settlement Date through
     and including the Rate Reset Date (assuming that the entire principal
     balance and all accrued interest as of such Rate Reset Date will be repaid
     on such Rate Reset Date), if the Settlement Date precedes such Rate Reset
     Date, or alternatively, the Maturity Date if the Settlement Date occurs
     after the Rate Reset Date.

               "SETTLEMENT DATE" shall mean, with respect to the Called
     Principal of any Note, the date on which such Called Principal is to be
     prepaid pursuant to paragraph 4 or is declared to be immediately due and
                         -----------                                         
     payable pursuant to paragraph 7A, as the context requires.
                         ------------                          

                                       18

 
               "YIELD-MAINTENANCE AMOUNT" shall mean, with respect to any Note,
     an amount equal to the excess, if any, of the Discounted Value of the
     Called Principal of such Note over the sum of (i) such Called Principal
     plus (ii) to the extent paid on the Settlement Date with the Called
     Principal, interest accrued thereon as of (including interest due on) the
     Settlement Date with respect to such Called Principal. The Yield-
     Maintenance Amount shall in no event be less than zero.

               10B.    OTHER TERMS.

               "ABS" shall mean mortgage, or other asset backed securities.

               "AFFILIATE" shall mean any Person directly or indirectly
     controlling, controlled by, or under direct or indirect common control
     with, the Company.  A Person shall be deemed to control a corporation if
     such Person possesses, directly or indirectly, the power to direct or cause
     the direction of the management and policies of such corporation, whether
     through the ownership of voting securities, by contract or otherwise.

               "BANKRUPTCY LAW" shall have the meaning specified in clause
                                                                    ------
     (viii) of paragraph 7A.
     ------    ------------ 

               "BIG FIVE ACCOUNTING FIRM" shall mean any of Arthur Andersen,
     Deloitte & Touche, KPMG Peat Marwick, PricewaterhouseCoopers and Ernst &
     Young.

               "BP PARTY" shall mean Boston Properties Limited Partnership, a
     Delaware limited partnership, and any Affiliate thereof, and shall also
     include, in all events, One Embarcadero Center Venture, a California
     general partnership.

               "CASH FLOW"  shall mean, in respect of any period, the sum of (a)
     Net Income for such period and (b) the amount of all depreciation and
     amortization allowances and other non-cash expenses of the Company but only
     to the extent deducted in the determination of Net Income for such period.

               "CERCLA" shall mean the Comprehensive Environmental Response,
     Compensation and Liability Act of 1980, as amended.

               "CODE" shall mean the Internal Revenue Code of 1986, as amended.

               "COMMERCIAL MORTGAGE LOANS" shall mean commercial mortgage loans
     made in substantial conformance with (x) standards prevailing in the
     commercial loan mortgage marketplace and (y) the guidelines contained in
     Exhibit C hereto.
     ---------        

                                       19

 
               "CURRENT DEBT" shall mean, with respect to the Company, all
     Indebtedness for borrowed money which by its terms or by the terms of any
     instrument or agreement relating thereto matures on demand or within one
     year from the date of the creation thereof and is not directly or
     indirectly renewable or extendible at the option of the debtor to a date
     more than one year from the date of the creation thereof, provided that
     Indebtedness for borrowed money outstanding under a revolving credit or
     similar agreement which obligates the lender or lenders to extend credit
     over a period of more than one year shall constitute Funded Debt and not
     Current Debt, even though such Indebtedness by its terms matures on demand
     or within one year from the date of the creation thereof.

               "DEBT" shall mean Current Debt and Funded Debt.

               "DEBT SERVICE" shall mean, with respect to any period, the sum of
     the following: (a) Interest Charges for such period, and (b) all payments
     of principal in respect of Debt of the Company paid or payable during such
     period.

               "DEBT SERVICE COVERAGE RATIO" shall mean, at any time of
     determination, the ratio of (a) Cash Flow for the most recent fiscal
     quarter to (b) Debt Service for such fiscal quarter.

               "DEFAULT" shall mean any of the events specified in paragraph 7A,
                                                                   ------------ 
     whether or not any requirement for such event to become an Event of Default
     has been satisfied.

               "DUFF & PHELPS" shall mean Duff & Phelps Corporation.

               "ENVIRONMENTAL LAWS" shall mean all laws relating to pollution,
     the release or other discharge, handling, disposition or treatment of
     Hazardous Materials and other substances or the protection of the
     environment or of employee health and safety, including, without
     limitation, CERCLA, the Hazardous Material Transportation Act (49 U.S.C.
     Section 1801 et. seq.), the Resource Conservation and Recovery Act (42
     U.S.C. Section 7401 et. seq.), the Clean Air Act (42 U.S.C. Section 401 et.
     seq.), the Toxic Substances Control Act (15 U.S.C. Section 651 et. seq.)
     and the Emergency Planning and Community Right-To-Know Act (42 U.S.C.
     Section 11001 et. seq.), each as the same may be amended and supplemented.

               "EVENT OF DEFAULT" shall mean any of the events specified in 
     paragraph 7A, provided that there has been satisfied any requirement in
     ------------
     connection with such event for the giving of notice, or the lapse of time,
     or the happening of any further condition, event or act.

               "EQUITY REDEMPTION LOAN" shall mean that certain loan in the
     aggregate principal amount of $328,143,000 by Bankboston. N.A., The Chase
     Manhattan Bank, Fleet National Bank, PNC Bank, National Association,
     Dresdner 

                                       20

 
     Bank AG New York Branch and Grand Cayman Branch, The Bank of New York, Key
     Bank National Association and Citizens Bank (and the other banks which may
     become parties to the Term Loan Agreement described immediately below) to
     you, Embarcadero Center Associates, Three Embarcadero Center Venture and
     Four Embarcadero Center Venture pursuant to that certain Term Loan
     Agreement dated as of November 12, 1998.

               "EXCHANGE ACT" shall mean the Securities Exchange Act of 1934, as
     amended.

               "FITCH" shall mean Fitch IVCA, Inc.

               "FUNDED DEBT" shall mean, with respect to any Person, all
     Indebtedness of such Person which by its terms or by the terms of any
     instrument or agreement relating thereto matures, or which is otherwise
     payable or unpaid, more than one year from, or is directly or indirectly
     renewable or extendible at the option of the debtor to a date more than one
     year (including an option of the debtor under a revolving credit or similar
     agreement obligating the lender or lenders to extend credit over a period
     of more than one year) from, the date of the creation thereof, including
     current maturities of long-term debt that appear as current liabilities in
     accordance with GAAP.

               "GAAP" shall have the meaning set forth in paragraph 10C.
                                                          ------------- 

               "GOOD FAITH CONTEST" shall mean, with respect to any tax,
     assessment, Lien, obligation, claim, liability, judgment, injunction,
     award, decree, order, law, regulation, statute or similar item, any
     challenge or contest thereof by appropriate proceedings timely initiated in
     good faith by the Company for which adequate reserves therefor have been
     taken in accordance with GAAP.

               "GUARANTEE" shall mean, with respect to any Person, any direct or
     indirect liability, contingent or otherwise, of such Person with respect to
     any indebtedness, lease, dividend or other obligation of another,
     including, without limitation, any such obligation directly or indirectly
     guaranteed, endorsed (otherwise than for collection or deposit in the
     ordinary course of business) or discounted or sold with recourse by such
     Person, or in respect of which such Person is otherwise directly or
     indirectly liable, including, without limitation, any such obligation in
     effect guaranteed by such Person through any agreement (contingent or
     otherwise) to

            (i) purchase, repurchase or otherwise acquire such obligation or any
          security therefor, or to provide funds for the payment or discharge of
          such obligation (whether in the form of loans, advances, stock
          purchases, capital contributions or otherwise);

                                       21

 
          (ii)  maintain the solvency or any balance sheet or other financial
          condition of the obligor of such obligation; or

          (iii) pay the purchase price for goods or services regardless of the
          non-delivery or non-furnishing thereof, in any such case if the
          purpose, intent or effect of such agreement is to provide assurance
          that such obligation will be paid or discharged, or that any
          agreements relating thereto will be complied with, or that the holders
          of such obligation will be protected against loss in respect thereof.

     The amount of any Guarantee shall be equal to the outstanding principal
     amount of the obligation guaranteed or such lesser amount to which the
     maximum exposure of the guarantor shall have been specifically limited.

               "HAZARDOUS MATERIALS"  shall mean (i) any material or substance
     defined as or included in the definition of "hazardous substances",
     "hazardous wastes", "hazardous material", "toxic substances" or any other
     formulations intended to define, list or classify substances by reason of
     their deleterious properties, (ii) any oil, petroleum or petroleum derived
     substance, (iii) any flammable substances or explosives, (iv) any
     radioactive materials, (v) asbestos in any form, (vi) electrical equipment
     that contains any oil or dielectric fluid containing levels or
     polychlorinated biphenyls in excess of 50 parts per million, (vii)
     pesticides or (viii) any other chemical, material or substance, exposure to
     which is prohibited, limited or regulated by any governmental agency or
     authority or which may or could pose a hazard to the health and safety of
     persons in the vicinity thereof.

               "INCLUDING" shall mean, unless the context clearly requires
     otherwise, "including without limitation".

               "INDEBTEDNESS" shall mean, with respect to any Person and without
     duplication (i) all items (excluding items of contingency reserves or of
     reserves for deferred income taxes) which in accordance with GAAP would be
     included in determining total liabilities as shown on the liability side of
     a balance sheet of such Person as of the date on which Indebtedness is to
     be determined, other than Preferred Stock of such Person except as set
     forth in clause (iv) below; (ii) all indebtedness secured by any Lien on,
              -----------                                                     
     or payable out of the proceeds or production from, any property or asset
     owned or held by such Person, whether or not the indebtedness secured
     thereby shall have been assumed, (iii) all indebtedness of third parties,
     including joint ventures and partnerships of which such Person is a
     venturer or general partner, recourse to which may be had against such
     Person, (iv) redemption obligations in respect of mandatorily redeemable
     Preferred Stock; and (v) all indebtedness and other obligations of others
     with respect to which such Person has become liable by way of a Guarantee.

                                       22

 
               "INITIAL TREASURY" shall mean, for any Note, the yield to
     maturity implied by (i) the bid-side yields reported, as of 10:00am (New
     York City time) (or, at your election, at such other time as we may
     mutually agree) on the Business Day next preceding the date upon which such
     Note is funded, on the display designated as "Page 8" on the Telerate
     Access Service, for actively traded U.S. Treasury securities having a
     maturity equal to the Rate Reset Date of such Note, or if such bid-side
     yields shall not be reported as of such time or the yields reported as of
     such time shall not be ascertainable, (ii) the Treasury Constant Maturity
     Series bid-side yields reported, for the latest day for which such yields
     shall have been so reported as of the Business Day next preceding the date
     upon which such Note is funded in Federal Reserve Statistical Release H.15
     (519) (or any comparable successor publication) for actively traded U.S.
     Treasury securities having a constant maturity equal to the Rate Reset Date
     of such Note.  Such implied yields shall be determined, if necessary, by
     (a) converting U.S. Treasury bill quotations to bond-equivalent yields in
     accordance with accepted financial practice and (b) interpolating linearly
     between yields reported for various maturities.  Notwithstanding the
     foregoing, subject to the Company's written approval (which approval shall
     not be unreasonably withheld or delayed), you shall be entitled to select a
     different actively traded U.S. Treasury security (which shall have a
     maturity date approximately equal and reasonably comparable to the first
     Rate Reset Date of such Note) the bid-side yield to maturity of which shall
     be the Initial Treasury for purposes of such Note; provided, however, that
                                                        --------  -------      
     if you select a different U.S. Treasury security which is approved by the
     Company pursuant to the foregoing or if a time other than 10:00 a.m. is
     used to determine the Initial Treasury, then the Margin for such Note shall
     be adjusted so that the interest rate on such Investment Note is no
     different than if you had not exercised your rights pursuant to this
     sentence to select a different U.S. Treasury or to agree to a different
     time for determining the Initial Treasury.  Schedule 1 sets forth the
                                                 ----------               
     definitive Initial Treasury for each Note.

               "INSTITUTIONAL INVESTOR" shall mean any insurance company,
     commercial, investment or merchant bank, finance company, mutual fund,
     registered money or asset manager, savings and loan association, credit
     union, registered investment advisor, pension fund, investment company,
     licensed broker-dealer, "qualified institutional buyer" (as such term is
     defined under Rule 144A promulgated under the Securities Act, or any
     successor law, rule or regulation) or "accredited investor" (as such term
     is defined under Regulation D promulgated under the Securities Act, or any
     successor law, rule or regulation).

               "INTANGIBLES" shall mean, without duplication, all Intellectual
     Property and operating agreements, treasury stock, deferred or capitalized
     research and development costs, goodwill (including any amounts, however
     designated, representing the cost of acquisition of business and
     investments in excess of the book value thereof), unamortized debt discount
     and expense, any write-up of asset value after June 30, 1997 and any other
     amounts reflected in contra-equity accounts, and any other assets treated
     as intangible assets under GAAP.

                                       23

 
               "INTELLECTUAL PROPERTY" shall mean all patents, trademarks,
     service marks, trade names, copyrights, brand names, mechanical or
     technical processes and paradigms, know-how, and similar intellectual
     property and applications, licenses and similar rights in respect of the
     same.

               "INTEREST CHARGES" shall mean, with respect to any period, the
     sum (without duplication) of the following: (a) all interest in respect of
     Debt of the Company deducted in determining Net Income for such period, and
     (b) all debt discount and expense amortized or required to be amortized in
     the determination of Net Income for such period.

               "INVESTMENTS" shall have the meaning provided in paragraph 6C(3).
                                                                --------------- 

               "LIEN" shall mean any mortgage, pledge, security interest,
     encumbrance, minimum or compensating deposit arrangement, lien (statutory
     or otherwise) or charge of any kind (including any agreement to give any of
     the foregoing, any conditional sale or other title retention agreement, any
     lease in the nature thereof, and the filing of or agreement to give any
     financing statement under the Uniform Commercial Code of any jurisdiction)
     or any other type of preferential arrangement for the purpose, or having
     the effect, of protecting a creditor against loss or securing the payment
     or performance of an obligation.

               "MARGIN" shall mean, for any Note, 165 basis points; provided
                                                                    --------
     that, if you select, for purposes of determining the Initial Treasury, a
     ----                                                                    
     different U.S. Treasury security from the U.S Treasury selected by the
     Company or if a time other than 10:00 a.m. is used to determine the Initial
     Treasury, in either case pursuant to your rights as described in the
     definition of Initial Treasury, then the Margin during the period of time
     commencing on the funding of the Investment Note until the first Rate Reset
     Date thereunder shall be adjusted as described in the last sentence of the
     definition of Initial Treasury and, from and after the first Rate Reset
     Date, the Margin shall again adjust to equal 165 basis points.  Schedule 1
                                                                     ----------
     sets forth the definitive initial Margin for each Note through the first
     Rate Reset Date of each Note.

               "MATERIAL ADVERSE EFFECT" shall mean (i) a material adverse
     effect on the business, assets, liabilities, operations, prospects or
     condition, financial or otherwise, of the Company, (ii) material impairment
     of the Company to perform any of its obligations under the Agreement and
     the Notes or (iii) material impairment of the validity or enforceability or
     the rights of, or the benefits available to, the holders of the Notes under
     this Agreement or the Notes.

               "MATURITY DATE" shall have the meaning set forth in paragraph 1
                                                                   -----------
     hereof.

               "MOODY'S" shall mean Moody's Investors Services, Inc., including
     the NCO/Moody's Commercial Division, or any successor Person.

                                       24

 
               "NET INCOME" shall mean, as to any period, consolidated gross
     revenues of the Company less all operating and non-operating expenses of
     the Company for such period, including all charges of a proper character
     (including current and deferred taxes on income, provision for taxes on
     unremitted foreign earnings which are included in gross revenues, and
     current additions to reserves), but not including in gross revenues the
     following:

               (i)    any gains (net of expenses and taxes applicable thereto)
               in excess of losses resulting from the Transfer of capital assets
               (i.e., assets other than current assets);

               (ii)   any gains resulting from the write-up of assets;

               (iii)  any equity of the Company in the undistributed earnings
               (but not losses) of any corporation which is not a Subsidiary;

               (iv)   any earnings or losses of any Person acquired by the
               Company through purchase, merger, consolidation or otherwise for
               any fiscal period prior to the fiscal period in which the
               acquisition occurs:

               (v)    gains or losses from the acquisition of securities or the
               retirement or extinguishment of Debt;

               (vi)   gains on collections from insurance policies or
               settlements;

               (vii)  any income or gain during such period from any change in
               accounting principles, from any discontinued operations or the
               disposition thereof, from any extraordinary items or from any
               prior period adjustment;

               (viii) in the case of a successor to the Company by consolidation
               or merger or as a transferee of its assets, any earnings of the
               successor corporation prior to such consolidation, merger or
               transfer of assets.

     If the preceding calculation results in a number less than zero, such
     amount shall be considered a net loss.

               "OFFICER'S CERTIFICATE" shall mean a certificate signed in the
     name of the Company by its President, one of its Vice Presidents or its
     Treasurer.

               "OTHER EC NOTES" shall mean those certain senior promissory notes
     of the Company issued by the Company on the date hereof to (a) Embarcadero
     Center Associates in the aggregate principal amount of $111,927,000 (b)
     Three Embarcadero Center Venture in the aggregate principal amount of
     $76,897,000 and 

                                       25

 
     (c) Four Embarcadero Center Venture in the aggregate principal amount of
     $143,119,000.

               "PERMITTED INVESTMENTS" shall have the meaning set forth in
     paragraph 6C(3).
     --------------- 

               "PERMITTED LIENS" shall have the meaning set forth in paragraph
                                                                     ---------
     6C(1).
     ----- 

               "PERSON" shall mean and include an individual, a partnership, a
     joint venture, a corporation, a limited liability company, a trust, an
     unincorporated organ  ization and a government or any department or agency
     thereof.

               "PHASE ONE" shall mean the closing and consummation of the
     transactions described in that certain Master Transaction Agreement dated
     as of September 28, 1998, by and among Prudential, PIC Realty Corporation,
     Fedmark Corporation, Embarcadero Center Investors Partnership, Pacific
     Property Services, L.P., the Persons listed on Exhibit A-1 attached
     thereto, Boston Properties Limited Partnership and Boston Properties, Inc.,
     which are to be consummated on the "Closing Date" (as defined in such
     Master Transaction Agreement).

               "PRUDENTIAL" shall mean The Prudential Insurance Company of
     America, a New Jersey mutual insurance company.

               "PRUDENTIAL GUARANTIED LOAN"  shall mean that certain loan in the
     aggregate principal amount of $92,000,000 by The Chase Manhattan Bank
     and/or any of its subsidiaries or affiliates (the "BANK") to you,
     Embarcadero Center Associates, Three Embarcadero Center Venture and Four
     Embarcadero Center Venture pursuant to that certain Term Loan Agreement
     dated as of November 12, 1998.
 
               "RATE RESET DATE", with respect to any Note, shall have the
meaning set forth in such Note.

               "RATED BANK" shall have the meaning set forth in paragraph
                                                                ---------
     6C(3)(ii).
     --------- 

               "RELEASE" shall mean any release, spill, emission, leaking,
     pumping, injection, deposit, disposal, discharge, leaching or migration
     into the indoor or outdoor environment, including, without limitation, the
     movement of Hazardous Materials through ambient air, soil, surface water,
     ground water, wetlands, land or subsurface strata, in violation of
     applicable law or prudent business practice.

               "REQUIRED HOLDER(S)" shall mean the holder or holders of at least
     51% of the aggregate principal amount of the Notes from time to time
     outstanding, 

                                       26

 
     but shall include, in any event, the BP Parties so long as any BP Party
     holds a direct or indirect interest in any Note.

               "RESET TREASURY" shall mean the yield to maturity implied by (i)
     the yields reported, as of 10:00am (New York City time) on the Business Day
     next preceding the Rate Reset Date for any Note, on the display designated
     as "Page 678" on the Telerate Access Service, for actively traded U.S.
     Treasury securities having a maturity equal to the earlier to occur of the
     next Rate Reset Date provided for in such Note (if any) and the Maturity
     Date of such Note, or if such yields shall not be reported as of such time
     or the yields reported as of such time shall not be ascertainable, (ii) the
     Treasury Constant Maturity Series yields reported, for the latest day for
     which such yields shall have been so reported as of the Business Day next
     preceding the Rate Reset Date in Federal Reserve Statistical Release H.15
     (519) (or any comparable successor publication) for actively traded U.S.
     Treasury securities having a constant maturity equal to the earlier to
     occur of the next Rate Reset Date provided for in such Note (if any) or the
     Maturity Date of such Note.  Such implied yields shall be determined, if
     necessary, by (a) converting U.S. Treasury bill quotations to bond-
     equivalent yields in accordance with accepted financial practice and (b)
     interpolating linearly between yields reported for various maturities.

               "RESPONSIBLE OFFICER" shall mean the chief executive officer,
     chief operating officer, chief financial officer or chief accounting
     officer of the Company or any other officer of the Company involved
     principally in its financial administration or its controllership function.

               "RESTRICTED INVESTMENT" shall mean any Investment other than a
     Permitted Investment.

               "RESTRICTED PAYMENTS" shall mean any of the following (provided
     that, notwithstanding anything to the contrary stated below, the term
     "Restricted Payments" does not include any distribution of capital gains by
     the Company to its shareholders):

               (i)   any dividend on any class of the Company's capital stock at
               any time after the date hereof;

               (ii)  any other distribution on account of any class of the
               Company's capital stock;

               (iii) any redemption, purchase or other acquisition, direct or
               indirect, of any shares of the Company's capital stock;

               (iv)  any unscheduled payment of principal of, or retirement,
               redemption, purchase or other acquisition of, any subordinated
               debt, 

                                       27

 
               including subordinated debt that is convertible into equity of
               the Company;

               (v)  any Restricted Investment;

               "S&P" shall mean Standard and Poor's Corporation, or any
     successor Person.

               "SECURITIES ACT" shall mean the Securities Act of 1933, as
     amended.

               "SHAREHOLDER" shall mean and include any Person who owns,
     beneficially or of record, directly or indirectly, at any time during any
     year with respect to which a computation is being made 5% or more of the
     outstanding voting stock of the Company.

               "SIGNIFICANT HOLDER" shall mean (i) any BP Party, so long as any
     BP Party shall hold (or be committed under this Agreement to purchase) any
     Note, or (ii) any other holder of at least 5% of the aggregate principal
     amount of the Notes from time to time outstanding.

               "SUBSIDIARY" shall mean any corporation or other entity at least
     51% of the total combined voting power of all classes of Voting Stock or
     similar securities of which shall, at the time as of which any
     determination is being made, be owned by the Company either directly or
     through Subsidiaries.

               "TOTAL ASSETS" shall mean, as at any time of determination, the
     total assets of a Person recorded on a balance sheet of such Person
     prepared in accordance with GAAP.

               "TRANSFER" shall mean, with respect to any item, the sale,
     exchange, conveyance, lease, transfer or other disposition of such item.

               "TRANSFEREE" shall mean any direct or indirect transferee of all
     or any part of any Note purchased by you under this Agreement.

               "TREASURY" shall mean, for any Note, the Initial Treasury or the
     then Reset Treasury, as the case may be, upon which the Margin under such
     Note is added to obtain the interest rate of such Note.

               "VOTING STOCK" shall mean, with respect to any corporation, any
     shares of stock of such corporation whose holders are entitled under
     ordinary circumstances to vote for the election of directors of such
     corporation (irrespective of whether at the time stock of any other class
     or classes shall have or might have voting power by reason of the happening
     of any contingency), and, with respect to any other entity, any similar
     security of such entity.

                                       28

 
          10C.    ACCOUNTING AND LEGAL PRINCIPLES, TERMS AND DETERMINATIONS.
     All references in this Agreement to "GAAP" shall mean generally accepted
     accounting principles, as in effect in the United States from time to time.
     Unless otherwise specified herein, all accounting terms used herein shall
     be interpreted, all determinations with respect to accounting matters
     hereunder shall be made, and all unaudited financial statements and
     certificates and reports as to financial matters required to be furnished
     hereunder shall be prepared, in accordance with GAAP (except as set forth
     in the next succeeding sentence of this paragraph 10C), applied on a basis
                                             -------------                     
     consistent with the most recent audited financial statements of the Company
     delivered pursuant to paragraph 5A(i) or (ii) or, if no such statements
                           ---------------    ----                          
     have been so delivered, the most recent audited financial statements
     referred to in clause (i) of paragraph 8B.  Notwithstanding the foregoing,
                    ----------    ------------                                 
     however, quarterly financial statements shall not include notes to
     financial statements and to that extent such statements will not have been
     prepared in accordance with GAAP. Any reference herein to any specific
     citation, section or form of law, statute, rule or regulation shall refer
     to such new, replacement or analogous citation, section or form should
     citation, section or form be modified, amended or replaced.

          11.  MISCELLANEOUS.

          11A.    NOTE PAYMENTS.  The Company agrees that, so long as you shall
     hold any Note, it will make payments of principal of, interest on and any
     Yield-Maintenance Amount payable with respect to such Note, which comply
     with the terms of this Agreement, by wire transfer of immediately available
     funds for credit (not later than 12:00 noon, New York City time, on the
     date due) to your account or accounts as specified in the Purchaser
     Schedule attached hereto, or such other account or accounts in the United
     States as you may designate in writing, notwithstanding any contrary
     provision herein or in any Note with respect to the place of payment.  You
     agree that, before disposing of any Note, you will make a notation thereon
     (or on a schedule attached thereto) of all principal payments previously
     made thereon and of the date to which interest thereon has been paid. Upon
     written request of the Company made concurrently with or reasonably
     promptly after payment or prepayment in full of any Note, you shall
     surrender such Note for cancellation, reasonably promptly after any such
     request, to the Company at its principal executive office.  The Company
     agrees to afford the benefits of this paragraph 11A to any Transferee which
                                           -------------                        
     shall have made the same agreement as you have made in this paragraph 11A.
                                                                 ------------- 

          11B.    EXPENSES.  The Company agrees, whether or not the transactions
     contemplated hereby shall be consummated, to pay, and save you and any
     Transferee harmless against liability for the payment of, all reasonable
     out-of-pocket costs and expenses arising in connection with such
     transactions, including:

                                       29

 
          (i) (A) all stamp and documentary taxes and similar charges and (B)
          costs of obtaining a private placement number for the Notes in each
          case as a result of the execution and delivery of this Agreement or
          the issuance of the Notes;

          (ii) document production and duplication charges and the reasonable
          fees and expenses of any special counsel engaged by you or such
          Transferee in connection with this Agreement and the transactions
          contemplated hereby;

          (iii) the costs and expenses, including reasonable attorneys' fees,
          incurred by you or such Transferee in enforcing any rights under this
          Agreement or the Notes; and

          (iv) any judgment, liability, claim, order, decree, cost, fee,
          expense, action or obligation resulting directly from the consummation
          of the transactions contemplated hereby, including the use of the
          proceeds of the Notes by the Company;

     provided that the Company shall not be responsible for (1) any of your
     --------                                                              
     expenses or those of a Transferee incurred solely in connection with any
     transfer of any Note or (2) the fees and expenses of more than one counsel
     for the holders of the Notes, except to the extent the Required Holders
     determine that (a) either legal advice is needed in a jurisdiction other
     than that specified in paragraph 11L or (b) there exists a conflict of
                            -------------                                  
     interest amongst the holders of the Notes.  The obligations of the Company
     under this paragraph 11B shall survive the transfer of any Note or portion
                -------------                                                  
     thereof or interest therein by you or any Transferee and the payment of any
     Note.

          11C.    CONSENT TO AMENDMENTS.  This Agreement may be amended, and the
     Company may take any action herein prohibited, or omit to perform any act
     herein required to be performed by it, if the Company shall obtain the
     written consent to such amendment, action or omission to act, of the
     Required Holder(s); except that, (i) without the written consent of the
                         ------ ----                                        
     holder or holders of all Notes at the time outstanding, no amendment to
     this Agreement shall change the maturity of any Note, or change the
     principal of, or the rate, method of computation or time of payment of
     interest on or any Yield-Maintenance Amount payable with respect to any
     Note, or affect the time, amount or allocation of any prepayments, or
     change the proportion of the principal amount of the Notes required with
     respect to any consent, amendment, waiver or declaration, and (ii) so long
     as any BP Holder holds any Note(s), no amendment, action or omission to act
     shall amend, modify or otherwise affect such BP Party's rights under the
     Note(s) that it holds (or its rights under this Agreement to the extent
     relating to such BP Party's Note(s)) without such BP Party's written
     consent.  Each holder of any Note at the time or thereafter outstanding
     shall be bound by any consent authorized by this paragraph 11C, whether or
                                                      -------------            
     not such Note shall have been marked to indicate such consent, but any
     Notes issued thereafter may bear a notation referring to any such consent.
     No course of dealing between the Company and the holder of any Note nor any
     delay in exercising any rights 

                                       30

 
     hereunder or under any Note shall operate as a waiver of any rights of any
     holder of such Note. As used herein and in the Notes, the term "this
     Agreement" and references thereto shall mean this Agreement as it may from
     time to time be amended or supplemented.

          11D.    FORM, REGISTRATION, TRANSFER AND EXCHANGE OF NOTES; LOST
     NOTES. The Notes are issuable as registered notes without coupons in
     denominations of at least $1,000,000, except as may be necessary to (i)
     reflect any principal amount not evenly divisible by $1,000,000 or (ii)
     enable the registration of transfer by a holder of its entire holding of
     Notes. The Company shall keep at its principal office a register in which
     the Company shall provide for the registration of Notes and of transfers of
     Notes. Upon surrender for registration of transfer of any Note at the
     principal office of the Company, the Company shall, at its expense, execute
     and deliver one or more new Notes of like tenor and of a like aggregate
     principal amount, registered in the name of such transferee or transferees.
     At the option of the holder of any Note, such Note may be exchanged for
     other Notes of like tenor and of any authorized denominations, of a like
     aggregate principal amount, upon surrender of the Note to be exchanged at
     the principal office of the Company. Whenever any Notes are so surrendered
     for exchange, the Company shall, at its expense, execute and deliver the
     Notes which the holder making the exchange is entitled to receive. Every
     Note surrendered for registration of transfer or exchange shall be duly
     endorsed, or be accompanied by a written instrument of transfer duly
     executed, by the holder of such Note or such holder's attorney duly
     authorized in writing. Any Note or Notes issued in exchange for any Note or
     upon transfer thereof shall carry the rights to unpaid interest and
     interest to accrue which were carried by the Note so exchanged or
     transferred, so that neither gain nor loss of interest shall result from
     any such transfer or exchange. Upon receipt of written notice from the
     holder of any Note of the loss, theft, destruction or mutilation of such
     Note and, in the case of any such loss, theft or destruction, upon receipt
     of such holder's indemnity agreement (which shall be unsecured if such
     holder is an Institutional Investor whose senior debt securities are rated
     BBB- or Baa3 or better by S&P or Moody's, respectively, and, otherwise,
     which shall be unsecured unless the Company requests in writing that such
     indemnity agreement be secured), or in the case of any such mutilation upon
     surrender and cancellation of such Note, the Company will make and deliver
     a new Note, of like tenor, in lieu of the lost, stolen, destroyed or
     mutilated Note. The Company shall give to any holder of a Note that is an
     Institutional Investor promptly upon request therefor, a complete and
     correct copy of the names and addresses of all registered holders of Notes.

          The Company may require payment of a sum sufficient to cover any stamp
     tax or governmental charge imposed in respect of any such transfer of
     Notes.

          11E.    TRANSFER OF NOTES; PERSONS DEEMED OWNERS.  Subject to the next
     succeeding sentence, you may transfer any Note or portion thereof in your
     sole discretion; provided, however, that any Transferee shall be an
     Institutional Investor. 

                                       31

 
     Prior to due presentment for registration of transfer, the Company may
     treat the Person in whose name any Note is registered as the owner and
     holder of such Note for the purpose of receiving payment of principal of,
     interest on and any Yield-Maintenance Amount payable with respect to such
     Note and for all other purposes whatsoever, whether or not such Note shall
     be overdue, and the Company shall not be affected by notice to the
     contrary.

          11F.    SURVIVAL OF REPRESENTATIONS AND WARRANTIES; ENTIRE AGREEMENT.
     All representations and warranties contained herein or made in writing by
     or on behalf of the Company in connection herewith shall survive the
     execution and delivery of this Agreement and the Notes, the transfer by you
     of any Note or portion thereof or interest therein and the payment of any
     Note, and may be relied upon by any Transferee, regardless of any
     investigation made at any time by or on behalf of you or any Transferee.
     Subject to the preceding sentence, this Agreement and the Notes embody the
     entire agreement and understanding between you and the Company and
     supersede all prior agreements and understandings between you and the
     Company relating to the subject matter hereof, and the Company shall not be
     affected by notice to the contrary.  No provision of this Agreement shall
     be interpreted for or against any party because that party or its legal
     representative drafted the provision.

          11G.    SUCCESSORS AND ASSIGNS.  All covenants and other agreements in
     this Agreement contained by or on behalf of either of the parties hereto
     shall bind and inure to the benefit of the respective successors and
     assigns of the parties hereto (including, without limitation, any
     Transferee) whether so expressed or not.

          11H.    NOTICES.  All written communications provided for hereunder
     shall be sent by first class mail or nationwide overnight delivery service
     (with charges prepaid) and (i) if to you, addressed to you at the address
     specified for such communications in the Purchaser Schedule attached
     hereto, or at such other address as you shall have specified to the Company
     in writing, (ii) if to any other holder of any Note, addressed to such
     other holder at such address as such other holder shall have specified to
     the Company in writing or, if any such other holder shall not have so
     specified an address to the Company, then addressed to such other holder in
     care of the last holder of such Note which shall have so specified an
     address to the Company, and (iii) if to the Company, addressed to it at
     Prudential Realty Group, 8 Campus Drive, 4th Floor, Arbor Circle South,
     Parsippany, New Jersey 07054, Attention: John Triece, or at such other
     address as the Company shall have specified to the holder of each Note in
     writing; provided, however, that any such communication to the Company may
     also, at the option of the holder of any Note, be delivered by any other
     means either to the Company at its address specified above or to any
     officer of the Company.

          11I.    PAYMENTS DUE ON NON-BUSINESS DAYS.  Anything in this Agreement
     or the Notes to the contrary notwithstanding, any payment of principal of
     or interest 

                                       32

 
     on any Note that is due on a date other than a Business Day shall be made
     on the next succeeding Business Day. If the date for any payment is
     extended to the next succeeding Business Day by reason of the preceding
     sentence, the period of such extension shall be included in the computation
     of the interest payable on such Business Day.

          11J.    SATISFACTION REQUIREMENT.  If any agreement, certificate or
     other writing, or any action taken or to be taken, is by the terms of this
     Agreement required to be satisfactory to you or to the Required Holder(s),
     the determination of such satisfaction shall be made by you or the Required
     Holder(s), as the case may be, in the reasonable judgment of the Person or
     Persons making such determination.

          11K.    INDEMNIFICATION.  The Company hereby agrees to indemnify you
     and your directors, officers, employees and agents from, and hold each of
     them harmless against, any and all losses, liabilities, claims, damages and
     expenses arising out of or by reason of any investigation or litigation or
     other proceeding relating to this Agreement, the Notes or the transactions
     contemplated hereby, including, without limitation, the reasonable fees and
     disbursements of counsel incurred in connection with any such investigation
     or litigation or other proceedings (but excluding any such losses,
     liabilities, claims, damages or expenses incurred by reason of the gross
     negligence or willful misconduct of the Person to be indemnified).

          11L.    GOVERNING LAW.  This Agreement shall be construed and enforced
     in accordance with, and the rights of the parties shall be governed by, the
     law of the State of New York.

          11M.    SEVERABILITY.  Any provision of this Agreement which is
     prohibited or unenforceable in any jurisdiction shall, as to such
     jurisdiction, be ineffective to the extent of such prohibition or
     unenforceability without invalidating the remaining provisions hereof, and
     any such prohibition or unenforceability in any jurisdiction shall not
     invalidate or render unenforceable such provision in any other
     jurisdiction.

          11N.    DESCRIPTIVE HEADINGS.  The descriptive headings of the several
     paragraphs of this Agreement are inserted for convenience only and do not
     constitute a part of this Agreement.

          11O.    COUNTERPARTS.  This Agreement may be executed in any number of
     counterparts, each of which shall be an original but all of which
     together shall constitute one instrument.

                                       33

 
          If you are in agreement with the foregoing, please sign the form of
     acceptance on the enclosed counterpart of this letter and return the same
     to the Company, whereupon this letter shall become a binding agreement
     between the Company and you.


                                    Very truly yours,


                                    PRUDENTIAL REALTY
                                    SECURITIES, INC.

                                    By: /s/ Paul D. Egan
                                       ------------------------
                                    Name: Paul D. Egan
                                    Title: Vice President


                                    By:________________________
                                    Name:______________________
                                    Title:_____________________

                                      S-1

 
The forgoing Agreement is
hereby accepted as of the
date first above written:

ONE EMBARCADERO CENTER VENTURE, a
California General Partnership

By:  BOSTON PROPERTIES LLC, as
     Managing General Partner

     By:  BOSTON PROPERTIES LIMITED
          PARTNERSHIP, as Manager

          By:  BOSTON PROPERTIES, INC.,
               as General Partner



               By: /s/ Thomas J. O'Connor
                  -------------------------------
               Name: Thomas J. O'Connor
               Title: Vice President

                                      S-2

 
                                   EXHIBIT A

                                [FORM OF NOTES]

                      PRUDENTIAL REALTY SECURITIES, INC.

                       SENIOR NOTE DUE __________, 200_

No. _____                                                     [Date]
$________


     FOR VALUE RECEIVED, the undersigned, PRUDENTIAL REALTY SECURITIES, INC.
(the "COMPANY"), a corporation organized and existing under the laws of the
State of Delaware, hereby promises to pay to ONE EMBARCADERO CENTER VENTURE, a
California general partnership, or registered assigns, the principal sum of
___________________________ DOLLARS ($______________) on _____________, ____
(the "Maturity Date"), with interest (computed on the basis of a 360-day year
comprised of 12 30-day months) on the unpaid balance thereof at the rate of
____% per annum from the date hereof through and including _______, ___ (the
"RATE RESET DATE") and thereafter through and including the Maturity Date, at a
rate of interest per annum equal to the sum of (i) ________ basis points, and
(ii) the Reset Treasury, as defined in the Note Agreement.  All such interest
shall be payable semiannually on the 15/th/ day of June and December in each
year, commencing with the first such date next succeeding the date hereof, until
the principal hereof shall have become due and payable, and shall be payable on
any overdue payment (including any overdue prepayment) of principal, any overdue
payment of interest and any overdue payment of any Yield-Maintenance Amount (as
defined in the Note Agreement), payable semiannually as aforesaid (or, at the
option of the registered holder hereof, on demand), at a rate per annum from
time to time equal to the lesser of (a) the maximum rate permitted by applicable
law and (b) 2.0% over the interest rate then in effect under this Note in
accordance with the foregoing terms and provisions.

     Payments of principal of, interest on and any Yield-Maintenance Amount
payable with respect to this Note are to be made in immediately available funds,
in lawful money of the United States of America, by wire transfer to [_______]
at [NAME OF BANK] in [New York City], ABA #________, Account # __________, or to
such other account or place as the registered holder hereof shall designate to
the Company in writing.

     This Note is one of a series of Senior Notes (the "NOTES") issued pursuant
to a Note Agreement, dated as of November 12, 1998 (the "NOTE AGREEMENT"),
between the Company and One Embarcadero Center Venture and is entitled to the
benefits thereof.

     This Note is a registered Note and, as provided in the Note Agreement, upon
surrender of this Note for registration of transfer, duly endorsed, or
accompanied by a written 

                                      A-1

 
instrument of transfer duly executed, by the registered holder hereof or such
holder's attorney duly authorized in writing, a new Note for a like principal
amount will be issued to, and registered in the name of, the transferee. Prior
to due presentment for registration of transfer, the Company may treat the
person in whose name this Note is registered as the owner hereof for the purpose
of receiving payment and for all other purposes, and the Company shall not be
affected by any notice to the contrary.

     This Note is subject to optional prepayment, in whole or from time to time
in part, on the terms specified in the Note Agreement.

     If an Event of Default, as defined in the Note Agreement, shall occur and
be continuing, the principal of this Note may be declared or otherwise become
due and payable in the manner and with the effect provided in the Note
Agreement.

     The Company and any and all endorsers, guarantors and sureties severally
waive grace, demand, presentment for payment, notice of dishonor or default,
notice of intent to accelerate, notice of acceleration (to the extent set forth
in the Note Agreement), protest and diligence in collecting.

     THIS NOTE IS INTENDED TO BE PERFORMED IN THE STATE OF NEW YORK AND SHALL BE
CONSTRUED AND ENFORCED IN ACCORDANCE WITH THE LAW OF SUCH STATE.

                              PRUDENTIAL REALTY SECURITIES, INC.



                              By_________________________
                                    [Vice] President


                              By_________________________
                                    Treasurer

                                      A-2

 
                                   EXHIBIT C

                             INVESTMENT GUIDELINES

1.   Invest only in investment grade fixed income assets that:

a) are current in payment and not in default (subject to cure periods):

b) minimally provide for interest payments which are (i) monthly in the case of
"non securities" investments (i.e., whole mortgage loans) or (ii) semi-annually
in the case of "securities" investments (i.e. ABS):

c) have a maturity date which is at least thirty months beyond the asset
purchase date:

d) include prepayment premiums providing for yield maintenance or the
substantial equivalent: and

e) on an individual basis, do not exceed 7% of the total portfolio:

2.   Make more than 80% of all investment in assets directly secured by first
mortgages. In addition: (a) no such assets may have a "loan to value" ratio
which exceeds 80%, and at least 90% of such assets shall have a "loan to value"
ratio which is 75% or less and (b) the overall portfolio of such assets shall be
geographically diverse.

 
                                                                   EXHIBIT 99.12


                      PRUDENTIAL REALTY SECURITIES, INC.
                                8 CAMPUS DRIVE
                         PARSIPPANY, NEW JERSEY 07054


As of November 12, 1998


EMBARCADERO CENTER ASSOCIATES
C/O BOSTON PROPERTIES, INC.
8 ARLINGTON STREET
BOSTON, MASSACHUSETTS 02116-3495
ATTN: GENERAL COUNCIL

Ladies and Gentlemen:

     The undersigned, PRUDENTIAL REALTY SECURITIES, INC. (herein called the
"COMPANY"), hereby agrees with you as follows:

     1.   AUTHORIZATION OF ISSUE OF NOTES.  The Company will authorize the issue
of up to eight (8) of its senior promissory notes in the aggregate principal
amount of $111,927,000 to be dated the date of issue thereof, to mature in the
case of each Note so issued, subject to the terms and provisions of the next
sentence below, not more than 15 years after the date of original issuance
thereof as set forth in each such Note (the "MATURITY DATE") and listed on
Schedule 1 attached hereto, to bear interest on the unpaid balance thereof from
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the date thereof until the Rate Reset Date or, if such Note does not have a Rate
Reset Date, the Maturity Date for each such Note at the rate per annum equal to
the Initial Treasury plus the Margin, and from the Rate Reset Date (if any) of
any such Note until the principal thereof shall have become due and payable at
the rate per annum equal to the Reset Treasury plus the Margin, and to have such
other particular terms, as shall be specified herein and therein, and to be
substantially in the form of Exhibit A attached hereto. Notwithstanding the
                             ---------                                     
foregoing, each Note shall either mature or have a Rate Reset Date within ten
(10) years after the date of original issuance of such Note.  The term "Notes"
as used herein shall include each such senior promissory note delivered pursuant
to any provision of this Agreement and each such senior promissory note
delivered in substitution or exchange for any other Note pursuant to any such
provision.

     2.   PURCHASE AND SALE OF NOTES.  The Company hereby agrees to sell to you
and, subject to the terms and conditions herein set forth, you agree to purchase
from the Company, Notes in the aggregate principal amount of $111,927,000 at
100% of such 

                                       1

 
aggregate principal amount. The Company will deliver to you, at the offices of
O'Melveny & Myers LLP at 275 Battery Street, Suite 2600, San Francisco,
California, (or such other location to be determined by mutual agreement between
the Company and you) one or more Notes registered in your name, evidencing the
aggregate principal amount of Notes to be purchased by you and in the
denomination or denominations specified in the Purchaser Schedule attached
hereto, against payment of the purchase price thereof by transfer of immediately
available funds for credit to the Company's account #890-0305-525 at The Bank of
New York, New York, New York, ABA No. 021-000-018 on the date of closing, which
shall be November 12, 1998 or any other date on or before November 13, 1998 upon
which the Company and you may mutually agree (herein called the "CLOSING" or the
"DATE OF CLOSING").

     3.   CONDITIONS OF CLOSING.  Your obligation to purchase and pay for the
Notes to be purchased by you hereunder is subject to the satisfaction, on or
before the date of closing, of the following conditions:

     3A.  EXECUTION AND DELIVERY OF DOCUMENTS.  The Company shall have
delivered, or cause to be delivered, to you duly executed, original or certified
copies of the following documents, each to be dated the date of closing unless
otherwise indicated:

          (i)   the Note(s), originally executed and in substantially the form
     of Exhibit A attached hereto.
        ---------                 

          (ii)  a favorable opinion of Deborah Shulevitz, Esq., counsel to the
     Company (or such other counsel designated by the Company and acceptable to
     you) satisfactory to you and substantially in the form of Exhibit B
                                                               ---------
     attached hereto and as to such other matters as you may reasonably request.

          (iii) the Certificate of Incorporation of the Company certified as of
     a date within 10 Business Days of closing by the Secretary of State of
     Delaware.

          (iv)  the Bylaws of the Company certified by the Secretary of the
     Company.

          (v)   an incumbency certificate signed by the Secretary or an
     Assistant Secretary of the Company certifying as to the names, titles and
     true signatures of the officers of the Company authorized to sign this
     Agreement and the Notes and the other documents to be delivered hereunder.

          (vi)  a certificate of the Secretary or an Assistant Secretary of the
     Company (A) attaching resolutions of the Board of Directors of the Company
     evidencing approval of the transactions contemplated by this Agreement and
     the issuance of the Notes and the execution, delivery and performance
     thereof, and authorizing certain officers to execute and deliver the same,
     and certifying that such resolutions were 

                                       2

 
     duly and validly adopted at a meeting duly noticed and held and such
     resolutions have not since been amended, revoked or rescinded, (B)
     certifying that no dissolution or liquidation proceedings as to the Company
     have been commenced or are contemplated, and (C) identifying and attaching
     any proposed or effected amendments to or changes in the Certificate of
     Incorporation of the Company since the date of the certified copies thereof
     provided pursuant to clause (iii) above or, if none, so certifying.
                          ------------                                  

          (vii)  (A) the representations and warranties contained in paragraph 8
                                                                     -----------
     shall be true on and as of the date of closing, except to the extent of
     changes caused by the transactions herein contemplated; (B) there shall
     exist on the date of closing no Event of Default or Default and no Event of
     Default or Default will occur by reason of or immediately following the
     sale of the Notes hereunder; (C) no condition, event or act that has had or
     would have a Material Adverse Effect has occurred since December 31, 1997,
     and (D) you shall have received an Officer's Certificate certifying as to
     all of the foregoing.

          (viii) a corporate good standing certificate as to the Company from
     the State of New Jersey.

          (xi)   additional documents or certificates with respect to such legal
     matters or corporate or other proceedings related to the transactions
     contemplated hereby as may be reasonably requested by you.

     3B.  PURCHASE PERMITTED BY APPLICABLE LAWS.  The purchase of and payment
for the Notes to be purchased by you on the date of closing on the terms and
conditions herein provided (including the use of the proceeds of such Notes by
the Company) shall not violate any applicable law or governmental regulation
(including, without limitation, Section 5 of the Securities Act or Regulation T,
U or X of the Board of Governors of the Federal Reserve System) and shall not
subject you to any tax, penalty, liability or other onerous condition under or
pursuant to any applicable law or governmental regulation, and you shall have
received such certificates or other evidence as you may request to establish
compliance with this condition.

     3C.  PROCEEDINGS.  All corporate and other proceedings taken or to be taken
in connection with the transactions contemplated hereby and all documents
incident thereto shall be satisfactory in substance and form to you, and you
shall have received all such counterpart originals or certified or other copies
of such documents as you may reasonably request.

     3D.  RATING.  The Company shall have obtained a rating of the Notes, as of
a date not more than 30 days prior to the closing hereof, of A or better from
S&P and the equivalent rating from Fitch and shall provide written evidence of
the same.

                                       3

 
     3E.  PHASE ONE TRANSACTIONS.  Phase One of the transactions shall have been
completed or shall be consummated concurrently with the consummation of the
transactions described herein.

     3F.  EQUITY REDEMPTION AND PRUDENTIAL GUARANTIED LOANS.  You shall have
obtained the Prudential Guarantied Loan and Equity Redemption Loan or the
closing of such loans shall occur concurrently with the closing of the
transactions contemplated herein; and the lenders of the Prudential Guarantied
Loan and Equity Redemption Loan shall have made available to you in full the
proceeds of the Prudential Guarantied Loan and Equity Redemption Loan.

     4.   PREPAYMENTS.  The Notes are not prepayable during the first year of
the term thereof.  The Notes shall be subject to prepayment, in whole or in part
at any time after the first anniversary date of this Agreement, at the option of
the Company, at 100% of the principal amount so prepaid plus accrued interest
thereon to the prepayment date and the Yield-Maintenance Amount, if any, under
the applicable Note with respect to the principal amount so prepaid; provided,
however, that any prepayment, whether in whole or in part, made on a Rate Reset
Date shall be payable without any Yield-Maintenance Amount.  If the Company
elects to prepay any of the Notes at any time while any BP Party holds any
Notes, the Company shall first offer to prepay all Notes then held by such BP
Party(ies) before offering to prepay any Notes held by any other Person.  Within
three (3) business days after delivery to it of any such offer of prepayment,
each such BP Party shall provide the Company written notice of its election to
either have such BP Party's Notes prepaid first or to have the Notes held by
other Persons prepaid prior to the Notes held by such BP Party; provided that,
                                                                -------- ---- 
notwithstanding the election of any such BP Party to have Notes held by other
Persons paid first, the Company may prepay any portion of such BP Party's Notes
once the Company has prepaid in full all Notes held by such other Persons.  The
failure of any BP Party to provide such notice to the Company within such three
(3) business day period shall be deemed an election to prepay such BP Party's
Notes first.

     5.   AFFIRMATIVE COVENANTS.

     5A.  FINANCIAL STATEMENTS.  The Company covenants that it will deliver to
each Significant Holder in duplicate:

          (i) as soon as practicable and in any event within 60 days after the
     end of each quarterly period (other than the last quarterly period) in each
     fiscal year, statements of income, cash flows and shareholders' equity of
     the Company for the period from the beginning of the current year to the
     end of such quarterly period, and a balance sheet of the Company as at the
     end of such quarterly period, setting forth in comparative form statements
     of income and cash flows for the corresponding period in the preceding
     year, all in reasonable detail and certified by an authorized financial
     officer of the Company, subject to changes resulting from year-end
     adjustments;

                                       4

 
          (ii)  as soon as practicable and in any event within 120 days after
     the end of each fiscal year, statements of income, cash flows and
     shareholders' equity of the Company for such year, and a balance sheet of
     the Company as at the end of such year, all prepared in accordance with
     GAAP, setting forth in each case in comparative form corresponding
     consolidated figures from the preceding annual audit, all in reasonable
     detail and satisfactory in form to the Required Holder(s)' and reported on
     by a Big Five Accounting Firm selected by the Company whose report shall be
     without limitation as to the scope of the audit and reasonably satisfactory
     in substance to the Required Holder(s) and shall be certified by such Big
     Five Accounting Firm to its knowledge with its unqualified opinion;

          (iii) promptly upon transmission thereof, copies of all such financial
     statements, proxy statements, notices and reports as it shall send to its
     stockholders;

          (iv)  promptly upon receipt thereof, a copy of each other report or
     management letter submitted to the Company by its independent public
     accountants in connection with any annual, interim or special audit made by
     them of the books of the Company;

           (v)  such other financial data and other information as the Company
     regularly provides to its other lenders, other holders of Debt or other
     creditors; and

          (vi)  with reasonable promptness, such other information and documents
     as such Significant Holder may reasonably request.

Together with each delivery of financial statements required by clauses (i) and
                                                                -----------    
(ii) above, the Company will deliver to each Significant Holder an Officer's
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Certificate demonstrating (with computations in reasonable detail) compliance by
the Company and its Subsidiaries with the provisions of paragraph 6A and stating
                                                        ------------            
that there exists no Event of Default or Default, or, if any Event of Default or
Default exists, specifying the nature and period of existence thereof and what
action the Company proposes to take with respect thereto.  Together with each
delivery of financial statements required by clause (ii) above, the Company will
                                             -----------                        
deliver to each Significant Holder a certificate of such accountants stating
that, in making the audit necessary for their report on such financial
statements, they have obtained no knowledge of any Event of Default or Default,
or, if they have obtained knowledge of any Event of Default or Default,
specifying the nature and period of existence thereof.  Such accountants,
however, shall not be liable to anyone by reason of their failure to obtain
knowledge of any Event of Default or Default which would not be disclosed in the
course of an audit conducted in accordance with generally accepted auditing
standards.

     The Company also covenants that promptly after any Responsible Officer
obtains knowledge of an Event of Default or Default, it will deliver to each
Significant Holder an 

                                       5

 
Officer's Certificate specifying the nature and period of existence thereof and
what action the Company has taken, is taking or proposes to take with respect
thereto.

     5B.  INSPECTION OF BOOKS AND RECORDS.  The Company covenants that it will
permit any Person designated by any Significant Holder in writing, at such
Significant Holder's expense, to visit the Company's place of business to
examine the corporate books and financial records of the Company and make copies
thereof or extracts therefrom and to discuss the affairs, finances and accounts
of the Company with the principal officers thereof and its independent public
accountants, all at such reasonable times and as often as such Significant
Holder may reasonably request; provided, however that disclosure of any
                               --------                                
confidential or material non-public information of the Company requested by such
Person may be reasonably conditioned on such Person's execution and delivery of
a confidentiality agreement in form and substance acceptable to Company.

     5C.  COVENANT TO SECURE NOTE EQUALLY.  The Company covenants that if it
shall create or assume any Lien upon any of its property or assets, whether now
owned or hereafter acquired, other than Liens permitted by the provisions of
paragraph 6C(1) (unless prior written consent to the creation or assumption
- ---------------                                                            
thereof shall have been obtained pursuant to paragraph 11C), it will make or
                                             -------------                  
cause to be made effective provision whereby the Notes will be secured by such
Lien equally and ratably with any and all other Debt thereby secured so long as
any such other Debt shall be so secured; provided that the creation and
                                         --------                      
maintenance of such equal and ratable Lien shall not in any way limit or modify
the right of the holders of the Notes to enforce the provisions of paragraph
                                                                   ---------
6C(1).
- ----- 

     5D.  COMPLIANCE WITH LAWS.  The Company covenants that it and all of its
properties and facilities will comply at all times in all material respects with
all federal, state, local and regional statutes, laws, ordinances and judicial
or administrative orders, judgments, rulings and regulations, including those
relating to protection of the environment except, in any such case, where
failure to comply would not result in a Material Adverse Effect on the business,
condition (financial or otherwise) or operations of the Company.

     5E.  PAYMENT OF TAXES.  The Company covenants that it will file or cause to
be filed all federal, state and other income tax returns which, to the knowledge
of the officers of the Company, are required to be filed, and will pay all taxes
as shown on such returns and on all assessments received by it to the extent
that such taxes become due, except such taxes as are subject to a Good Faith
Contest.

     5F.  ENFORCEMENT OF MORTGAGE PROVISIONS.  The Company covenants that it
shall require any Commercial Mortgage Loans originated or acquired by it to
contain covenants to the effect that (1) the mortgagor shall obtain and maintain
at all times appropriate insurance coverage with respect to the mortgaged
property and (2) the mortgagor shall promptly pay and discharge any indebtedness
or lawful claims against the mortgaged property which if unpaid would constitute
a Lien on such property.  The Company further 

                                       6

 
covenants and agrees that it will use commercially reasonable efforts to enforce
such covenants.

     6.     NEGATIVE COVENANTS.  So long as any Note or amount owing under this
Agreement shall remain unpaid, the Company covenants that:

     6A(1). DEBT SERVICE COVERAGE RATIO.  The Company will not, at any time,
permit the Debt Service Coverage Ratio to be less than 1.4 to 1.

     6A(2). DEBT TO TOTAL ASSETS RATIO.  The Company will not permit the ratio
of (i) Debt to (ii) the sum of Total Assets plus the cumulative depreciation of
any real property assets of the Company to exceed .70 to 1.

     6B.  RESTRICTED PAYMENTS.  The Company covenants that it will not make, pay
or declare, or commit to make, pay or declare, any Restricted Payment unless,
after giving effect thereto, (i) the aggregate amount of all Restricted Payments
made during the twelve month period commencing on the date hereof and expiring
on the one (1) year anniversary of the date hereof, and including all previously
made Restricted Payments, does not exceed 100% of the lesser of (A) Net Income
and (B) Net Income (determined without giving effect to any current income taxes
or any change in deferred taxes), in each case, for all such fiscal quarters
during such time period on a cumulative basis, and (ii) the aggregate amount of
all Restricted Payments made during any fiscal quarter after the expiration of
such twelve (12) month period, and including all previously made Restricted
Payments, does not exceed 105% of the lesser of (C) Net Income and (D) Net
Income (determined without giving effect to any current income taxes or any
change in deferred taxes), in each case, for all such fiscal quarters on a
cumulative basis, and (iii) no Default or Event of Default exists or would exist
after giving effect to such Restricted Payment.

     6C.  LIENS, DEBT, AND OTHER RESTRICTIONS.  The Company will not:

     6C(1).  LIENS.  Create, assume or suffer to exist any Lien upon any of its
properties or assets, whether now owned or hereafter acquired, or any income,
participation, royalty or profits therefrom (whether or not provision is made
for the equal and ratable securing of the Notes in accordance with the
provisions of paragraph 5C), except for the Liens specified in clauses (i)
              ------------   ------                            -----------
through (xi) below (collectively, "PERMITTED LIENS");
        ----                                         

             (i)  Liens for taxes, assessments or other governmental levies or
     charges not yet due or which are subject to a Good Faith Contest;

             (ii) statutory Liens of landlords and Liens of carriers,
     contractors, warehousemen, mechanics and materialmen incurred in the
     ordinary course of business for sums not yet due or which are subject to a
     Good Faith Contest;

                                       7

 
          (iii)  Liens (other than any Lien imposed by the Employee Retirement
     Income Security Act of 1974, as amended ("ERISA")) incurred, or deposits
     made, in the ordinary course of business (A) in connection with workers'
     compensation, unemployment insurance, old age benefit and other types of
     social security, (B) to secure (or to obtain letters of credit that secure)
     the performance of tenders, statutory obligations, surety and appeal bonds,
     bids, leases, performance bonds, purchase, construction, government or
     sales contracts and other similar obligations or (C) otherwise to satisfy
     statutory or legal obligations; provided, that in each such case such Liens
                                     --------                                   
     (1) were not incurred or made in connection with the incurrence or
     maintenance of Indebtedness, the borrowing of money, the obtaining of
     advances or credit, and (2) do not in the aggregate materially detract from
     the value of the property or assets so encumbered or materially impair the
     use thereof in the operation of its business;

          (iv)   Liens existing (A) prior to the time of acquisition upon any
     property acquired by the Company through purchase, merger or consolidation
     or otherwise, whether or not expressly assumed by the Company, or (B)
     placed on property at the time of acquisition by the Company or to secure
     all or a portion of (or to secure Debt incurred to pay all or a portion of)
     the purchase price thereof; provided that such Lien shall not have been
                                 --------                                   
     created, incurred or assumed in contemplation of such purchase, merger,
     consolidation or other event;

          (v)    Liens now or hereafter required by this Agreement;

          (vi)   Liens in existence on the date hereof as set forth on Schedule
                                                                       --------
     6C(1) hereto;
     -----        

          (vii)  leases, subleases, licenses and sublicenses granted to third
     parties not interfering in any material respect with the business of the
     Company;

          (viii) minor survey exceptions or minor encumbrances, easements or
     reservations, or rights of others for rights-of-way, utilities and other
     similar purposes, or zoning or other restrictions as to use of real
     property, that are necessary for the conduct of the operations of the
     Company or that customarily exist on properties of corporations engaged in
     similar businesses and are similarly situated and that do not in any event
     materially impair their use in the operations of the Company;

          (ix)   any attachment or judgment Lien, unless the judgment it secures
     shall not, within 60 days after the entry thereof, have been discharged or
     execution thereof stayed pending appeal, or shall not have been discharged
     within 60 days after the expiration of any such stay; provided the
                                                           --------    
     aggregate amount of such attachment or judgment Liens shall not secure
     obligations in excess of $10,000,000 at any time;

                                       8

 
          (x)   Liens other than those described in clauses (i) through (ix)
                                                    -----------         ----
     above that secure Debt permitted by clauses (i) and (ii) of paragraph
                                         -----------     ----    ---------
     6C(2); provided that no Default or Event of Default shall exist and be
     -----  --------                                                       
     continuing or shall result therefrom; or

          (xi)  any Lien renewing, extending or refunding any Lien permitted by
                                                                               
     clause (x) above.
     ----------       

     6C(2).  DEBT.  Create, incur, assume or in any other way become liable in
respect of any Debt, except
                     ------

             (i)   the Notes;

             (ii)  Funded Debt of the Company described in Schedule 6C(2) and
                                                           --------------    
     outstanding as of the date hereof; and

             (iii) additional Funded Debt of the Company in an amount, which
     when added to all other Funded Debt of the Company then outstanding (but
     excluding the Funded Debt evidenced by the Notes and the Other EC Notes),
     does not exceed $1,000,000,000 at any one time outstanding.

     6C(3).  LOANS, ADVANCES, INVESTMENTS AND CONTINGENT LIABILITIES.  Make or
permit to remain outstanding any loan or advance to, or extend credit other than
credit extended in the normal course of business to any Person who is not an
Affiliate of the Company to, or Guarantee, directly or indirectly, in connection
with the obligations, stock or dividends of, or own, purchase or acquire any
stock, obligations or securities of, or any other interest in, or make any
capital contribution to, any Person, or commit to do any of the foregoing, (all
of the foregoing collectively being "INVESTMENTS"), except for the Investments
                                                    ------                    
set forth in clauses (i) through (ix) below (collectively, "PERMITTED
             -----------         ----                                
INVESTMENTS"):

             (i)   obligations backed by the full faith and credit of the United
     States Government (whether issued by the United States Government or an
     agency thereof), and obligations guaranteed by the United States
     Government, in each case which mature within one year from the date
     acquired;

             (ii)  demand and time deposits with, Eurodollar deposits with or
     certificates of deposit issued by any commercial bank or trust company (1)
     organized under the laws of the United States or any of its states or
     having branch offices therein, (2) having equity capital in excess of
     $100,000,000 and (3) which issues either (x) senior debt securities rated A
     or better by S&P, A or better by Moody's or (y) commercial paper rated A-2
     or better by S&P or Prime-2 or better by Moody's (or, in either case, an
     equivalent rating from another nationally recognized credit rating agency)
     ("RATED BANKS"), in each case payable in the United States in United States
     dollars and in each case which mature within one year from the date
     acquired;

                                       9

 
          (iii)  marketable commercial paper and loan participations rated A-1
     or better by S&P or P-1 or better by Moody's (or, in either case, an
     equivalent rating from another nationally recognized credit rating agency)
     and maturing not more than 270 days from the date acquired;

          (iv)   bonds, debentures, notes or similar debt instruments issued by
     a state or municipality given a "AA" rating or better by S&P or an
     equivalent rating by another nationally recognized credit rating agency and
     maturing not more than one year from the date acquired;

          (v)    the loans, investments and advances existing as of the date
     hereof and listed on Schedule 6C(3) hereto;
                          --------------        

          (vi)   repurchase agreements and similar commercial undertakings for
     terms of less than one year with any Rated Bank, provided that such
                                                      --------          
     repurchase agreements or undertakings are secured and collateralized by
     obligations backed by the full faith and credit of the United States
     Government in aggregate face amount equal to or greater than the
     obligations so secured;

          (vii)  money market mutual funds that (A) are denominated in U.S.
     Dollars, (B) have average asset maturities not in excess of 365 days, (C)
     have total invested assets in excess of $1,000,000,000 and (D) invest
     exclusively in Permitted Investments other than those described in Clause
                                                                        ------
     (ix) below, or are rated at least BBB- by S&P;
     ----                                          

          (viii) bonds, debentures, notes or similar debt instruments issued by
     a corporation organized and existing under the laws of any state of the
     United States of America or the District of Columbia and having a long term
     credit rating of BBB-or better from S&P or Baa3 or better from Moody's; and

          (ix)   Commercial Mortgage Loans and ABS originated, purchased or
     acquired by the Company in the ordinary course of its business, provided
     that any such Commercial Mortgage Loan or ABS shall comply with the
     investment guidelines set forth on Exhibit C hereto at the time of
                                        ---------                      
     origination, purchase, or acquisition by the Company; and further provided,
     that at all times the Company's portfolio of Investments, taken as a whole,
     shall be in compliance with such investment guidelines.

     6C(4).  MERGER AND CONSOLIDATION.  Merge or consolidate with any other
Person, except that the Company may consolidate or merge with any other
corporation if (A) the Company shall be the continuing or surviving corporation
and (B) no Default or Event of Default exists or would exist after giving effect
to such merger or consolidation.

                                       10

 
     6C(5). TRANSFER OF ASSETS.  Transfer, or agree or otherwise commit to
Transfer, a substantial portion of its assets.

     6C(6) ISSUANCE OF ADDITIONAL UNSECURED NOTES.  Issue any unsecured notes
of the Company which are rated lower than the rating of the Notes on the date
hereof.

     7.     EVENTS OF DEFAULT.

     7A.    ACCELERATION.  If any of the following events shall occur and be
continuing for any reason whatsoever (and whether such occurrence shall be
voluntary or involuntary or come about or be effected by operation of law or
otherwise):

            (i)   the Company defaults in the payment of any principal of or
     Yield-Maintenance Amount payable with respect to any Note when the same
     shall become due, either by the terms thereof or otherwise as herein
     provided; or

            (ii)  the Company defaults in the payment of any interest on any
     Note for more than 10 days after the date due; or

            (iii) the Company defaults (whether as primary obligor or as
     guarantor or other surety) in any payment of principal of or interest on
     any other Debt (other than secured Debt which is non-recourse to the
     Company) beyond any period of grace provided with respect thereto, or the
     Company fails to perform or observe any other agreement, term or condition
     contained in any agreement under which any such Debt is created (or if any
     other event thereunder or under any such agreement shall occur and be
     continuing) and the effect of such failure or other event is to cause, or
     to permit the holder or holders of such (or a trustee on behalf of such
     holder or holders) to cause, such Debt to become due (or to be repurchased
     by the Company) prior to any stated maturity, provided that the aggregate
     amount of all Debt as to which such a payment default shall occur and be
     continuing or such a failure or other event causing or permitting
     acceleration (or resale to the Company) shall occur and be continuing
     exceeds an amount equal to the lesser of (x) $10,000,000 and (y) 5% of the
     net assets of the Company as reflected on its most recent balance sheet at
     the time of determination; or

            (iv)  any representation or warranty made by or on behalf of the
     Company or any of its officers herein or in any other writing furnished in
     connection with or pursuant to this Agreement or the transactions
     contemplated hereby shall be false in any material respect on the date as
     of which made; or

            (v)   the Company fails to perform or observe any agreement
     contained in paragraph 6; or
        

                                       11

 
          (vi)   the Company fails to perform or observe any other agreement,
     term or condition contained herein and such failure shall not be remedied
     within 30 days after the Company receives written notice of such default
     from any holder of a Note; or

          (vii)  the Company makes an assignment for the benefit of creditors or
     is generally not paying its debts as such debts become due; or

          (viii) any decree or order for relief in respect of the Company is
     entered under any bankruptcy, reorganization, compromise, arrangement,
     insolvency, readjustment of debt, dissolution or liquidation or similar
     law, whether now or hereafter in effect (herein called the "BANKRUPTCY
     LAW"), of any jurisdiction; or

          (ix)   the Company petitions or applies to any tribunal for, or
     consents to, the appointment of, or taking possession by, a trustee,
     receiver, custodian, liquidator or similar official of the Company, or of
     any substantial part of the assets of the Company, or commences a voluntary
     case under the Bankruptcy Law of the United States or any proceedings
     relating to the Company under the Bankruptcy Law of any other jurisdiction;
     or

          (x)    any such petition or application is filed, or any such
     proceedings are commenced, against the Company and the Company by any act
     indicates its approval thereof, consent thereto or acquiescence therein, or
     an order, judgment or decree is entered appointing any such trustee,
     receiver, custodian, liquidator or similar official, or approving the
     petition in any such proceedings, and such order, judgment or decree
     remains unstayed and in effect for more than 60 days; or

          (xi)   any order, judgment or decree is entered in any proceedings
     decreeing the dissolution of the Company and such order, judgment or decree
     remains unstayed and in effect for more than 60 days; or

          (xii)  one or more final judgments in an aggregate amount in excess of
     $10,000,000 is rendered against the Company and, within 60 days after entry
     thereof, a solvent insurance carrier or carriers have not confirmed in
     writing that each such judgment is fully insured or any such judgment is
     not discharged or execution thereof stayed pending appeal, or within 60
     days after the expiration of any such stay, any such judgment is not
     discharged;

     then (a) if such event is an Event of Default specified in clauses (i) or
                                                                -----------   
     (ii) of this paragraph 7A, the holder of any Note (other than the Company
     ----         ------------                                                
     or any of its Affiliates) may at its option during the continuance of such
     Event of Default, by notice in writing to the Company, declare such Note to
     be, and such Note shall thereupon be and become, immediately due and
     payable at par, together with interest accrued thereon, without
     presentment, demand, protest or other notice of any kind, 

                                       12

 
     all of which are hereby waived by the Company, (b) if such event is an
     Event of Default specified in clause (viii), (ix) or (x) of this paragraph
                                   -------------  ----    ---         ---------
     7A, all of the Notes at the time outstanding shall automatically become
     --
     immediately due and payable, together with interest accrued thereon and the
     Yield-Maintenance Amount, if any and to the extent permitted by law, with
     respect to each Note, without presentment, demand, protest or notice of any
     kind, all of which are hereby waived by the Company, and (c) with respect
     to any other event constituting an Event of Default, the Required Holder(s)
     may, at its or their option, by notice in writing to the Company, declare
     all of the Notes to be, and all of the Notes shall thereupon be and become,
     immediately due and payable together with interest accrued thereon and
     together with the Yield-Maintenance Amount, if any, with respect to each
     Note, without presentment, demand, protest or other notice of any kind, all
     of which are hereby waived by the Company (provided that, so long as any BP
                                                -------- ----                   
     Party holds any Note(s), such BP Party may declare its Note(s) to be
     immediately due and payable with respect to any such other event
     constituting an Event of Default without the consent or approval of the
     other Holders).

          The Company acknowledges, and the parties hereto agree, that each
     holder of a Note has the right to maintain its investment in the Notes free
     from repayment by the Company (except as herein specifically provided for)
     and that the provision for payment of the Yield-Maintenance Amount by the
     Company in the event that the Notes are prepaid or are accelerated as a
     result of an Event of Default, is intended to provide compensation for the
     deprivation of such right under such circumstances.

     7B.  RESCISSION OF ACCELERATION.  At any time after any or all of the Notes
shall have been declared immediately due and payable pursuant to paragraph 7A,
                                                                 ------------ 
the Required Holder(s) may, by notice in writing to the Company, rescind and
annul such declaration and its consequences if (i) the Company shall have paid
all overdue interest on the Notes, the principal of and Yield-Maintenance
Amount, if any, payable with respect to any Notes which have become due
otherwise than by reason of such declaration, and interest on such overdue
interest and overdue principal and Yield-Maintenance Amount at the applicable
rate specified in the Notes, (ii) the Company shall not have paid any amounts
which have become due solely by reason of such declaration, (iii) all Events of
Default and Defaults, other than non-payment of amounts which have become due
solely by reason of such declaration, shall have been cured or waived pursuant
to paragraph 11C, and (iv) no judgment or decree shall have been entered for the
   -------------                                                                
payment of any amounts due pursuant to the Notes or this Agreement.
Notwithstanding the foregoing, so long as any BP Holder holds any Note(s), only
such BP Holder shall be permitted to rescind and annul any such declaration with
respect to the Note(s) that it holds.  No such rescission or annulment shall
extend to or affect any subsequent Event of Default or Default or impair any
right arising therefrom.

     7C.  NOTICE OF ACCELERATION OR RESCISSION.  Whenever any Note shall be
declared immediately due and payable pursuant to paragraph 7A or any such
                                                 ------------            
declaration shall be 

                                       13

 
rescinded and annulled pursuant to paragraph 7B, the Company shall forthwith
                                   ------------     
give written notice thereof to the holder of each Note at the time outstanding.

     7D.  OTHER REMEDIES.  If any Event of Default shall occur and be
continuing, the holder of any Note may proceed to protect and enforce its rights
under this Agreement and such Note by exercising such remedies as are available
to such holder in respect thereof under applicable law, either by suit in equity
or by action at law, or both, whether for specific performance of any covenant
or other agreement contained in this Agreement or in aid of the exercise of any
power granted in this Agreement.  No remedy conferred in this Agreement upon the
holder of any Note is intended to be exclusive of any other remedy, and each and
every such remedy shall be cumulative and shall be in addition to every other
remedy conferred herein or now or hereafter existing at law or in equity or by
statute or otherwise.

     8.   REPRESENTATIONS, COVENANTS AND WARRANTIES.  The Company represents,
covenants and warrants as follows:

     8A.  ORGANIZATION.  The Company is a corporation duly organized and
existing in good standing under the laws of the State of Delaware, and is duly
qualified as a foreign corporation and is in good standing in each jurisdiction
in which such qualification is required by law, other than those jurisdictions
as to which the failure to be so qualified or in good standing would not,
individually or in the aggregate, reasonably be expected to have a Material
Adverse Effect.  The Company has the corporate power and authority to own or
hold under lease the properties it purports to own or hold under lease, to
transact the business it transacts and proposes to transact, to execute and
deliver this Agreement and the Notes and to perform the provisions hereof and
thereof.  The Company has no Subsidiaries.

     8B.  FINANCIAL STATEMENTS.  The Company has furnished you with the
unaudited financial statements, certified by a principal financial officer of
the Company:  a balance sheet of the Company as of June 30, 1998 and statements
of income, stockholders' equity and cash flows for the six-month period ended on
such date, prepared by the Company.  To the Company's knowledge, such financial
statements are true and correct in all material respects (subject, as to interim
statements, to changes resulting from audits and year-end adjustments), have
been prepared in accordance with GAAP consistently followed through  out the
periods involved and show all liabilities, direct and contingent, of the Company
required to be shown in accordance with such principles.  To the Company's
knowledge, the balance sheets fairly present the condition of the Company as at
the dates thereof, and the statements of income, stockholders' equity and cash
flows fairly present the results of the operations of the Company and its cash
flows for the periods indicated.  To the knowledge of the Company, there has
been no material adverse change in the business, condition (financial or
otherwise) or operations of the Company since June 30, 1998.

     8C.  ACTIONS PENDING.  There is no action, suit, investigation or
proceeding pending or, to the knowledge of the Company, threatened against the
Company, or any properties or rights of the Company, by or before any court,
arbitrator or administrative or 

                                       14

 
governmental body which (i) might result in a Material Adverse Effect or (ii)
purports to affect the validity or enforceability of this Agreement, any Note
issued hereunder or the transactions contemplated hereby.

     8D.  TAXES.  The Company has filed all federal, state and other income tax
returns which, to the knowledge of the officers of the Company, are required to
be filed, and has paid all taxes as shown on such returns and on all assessments
received by it to the extent that such taxes have become due, except such taxes
as are subject to a Good Faith Contest.

     8E.  CONFLICTING AGREEMENTS AND OTHER MATTERS.  The Company is not a party
to any contract or agreement or subject to any charter or other corporate
restriction which materially and adversely affects its business, property or
assets, or financial condition. Neither the execution nor delivery of this
Agreement or the Notes, nor the offering, issuance and sale of the Notes, nor
fulfillment of nor compliance with the terms and provisions hereof and of the
Notes will materially conflict with, or result in a material breach of the
terms, conditions or provisions of, or constitute a default under, or result in
any material violation of, or result in the creation of any Lien upon any of the
properties or assets of the Company pursuant to, the charter or by-laws of the
Company, any award of any arbitrator or any agreement (including any agreement
with stockholders), instrument, order, judgment, decree, statute, law, rule or
regulation to which the Company is subject.  Except as set forth in Schedule 8E
                                                                    -----------
attached hereto, the Company is not a party to, or otherwise subject to any
provision contained in, any instrument evidencing Indebtedness of the Company,
any agreement relating thereto or any other contract or agreement (including its
charter) which limits the amount of, or otherwise imposes restrictions on the
incurring of, Debt of the Company of the type to be evidenced by the Notes.

     8F.  OFFERING OF NOTES.  Neither the Company nor any agent acting on its
behalf has, directly or indirectly, offered the Notes or any similar security of
the Company for sale to, or solicited any offers to buy the Notes or any similar
security of the Company from, or otherwise approached or negotiated with respect
thereto with, any Person other than Institutional Investors, and neither the
Company nor any agent acting on its behalf has taken or will take any action
which would subject the issuance or sale of the Notes to the provisions of
section 5 of the Securities Act or to the provisions of any securities or Blue
Sky law of any applicable  jurisdiction.

     8G.  USE OF PROCEEDS.  The Company does not own or have any present
intention of acquiring any "margin stock" as defined in Regulation U (12 CFR
Part 207) of the Board of Governors of the Federal Reserve System (herein called
"MARGIN STOCK").  The proceeds of sale of the Notes will be used to purchase
Commercial Mortgage Loans and/or marketable debt securities, including, but not
limited to, ABS.  None of such proceeds will be used, directly or indirectly,
for the purpose, whether immediate, incidental or ultimate, of purchasing or
carrying any margin stock or for the purpose of maintaining, reducing or
retiring any Indebtedness which was originally incurred to purchase or carry any
stock that is currently a margin stock or for any other purpose which might
constitute this transaction a

                                       15

 
"purpose credit" within the meaning of such Regulation U. Neither the Company
nor any agent acting on its behalf has taken or will take any action which might
cause this Agreement or the Notes to violate Regulation U, Regulation T or any
other regulation of the Board of Governors of the Federal Reserve System or to
violate the Exchange Act, in each case as in effect now or as the same may
hereafter be in effect.

     8H.  ERISA.  The Company has no retirement or employee benefit plans
subject to ERISA.

     8I.  GOVERNMENTAL CONSENT.  No circumstance in connection with the
offering, issuance, sale or delivery of the Notes is such as to require any
authorization, consent, approval, exemption or other action by or notice to or
filing with any court or administrative or governmental body in connection with
the execution and delivery of this Agreement, the offering, issuance, sale or
delivery of the Notes or fulfillment of or compliance with the terms and
provisions hereof or of the Notes, if the failure to obtain any such consent
would have a Material Adverse Effect.

     8J.  COMPLIANCE WITH LAWS.  The Company and all of its properties and
facilities have complied at all times in all material respects with all federal,
state, local and regional statutes, laws, ordinances and judicial or
administrative orders, judgments, rulings and regulations, except, in any such
case, where failure to comply would not result in a Material Adverse Effect on
the business, condition (financial or otherwise) or operations of the Company.

     8K.  INVESTMENT COMPANY STATUS.  Neither the Company nor any Subsidiary is
an "investment company" or a company "controlled" by an "investment company"
within the meaning of the Investment Company Act of 1940, as amended, or an
"investment adviser" within the meaning of the Investment Advisers Act of 1940,
as amended.

     8L.  DUE AUTHORIZATION, ETC.  This Agreement and the Notes have been duly
authorized by all necessary corporate action on the part of the Company, and
this Agreement constitutes, and upon execution and delivery thereof each Note
will constitute, a legal, valid and binding obligation of the Company
enforceable against the Company in accordance with its terms, except as such
enforceability may be limited by (i) applicable bankruptcy, insolvency,
reorganization, moratorium or other similar laws affecting the enforcement of
creditors' rights generally and (ii) general principles of equity (regardless of
whether such enforceability is considered in a proceeding in equity or at law).

     8M.  DISCLOSURE. Neither this Agreement nor any other document, certificate
or statement furnished to you by or on behalf of the Company in connection
herewith contains any untrue statement of a material fact or omits to state a
material fact necessary in order to make the statements contained herein and
therein not misleading. There is no fact peculiar to the Company which
materially adversely affects or in the future may (so far as the Company can now
foresee) materially adversely affect the business, property or assets, or

                                       16

 
financial condition of the Company and which has not been set forth in this
Agreement or in the other documents, certificates and written statements
furnished to you and Boston Properties Limited Partnership, a Delaware limited
partnership by or on behalf of the Company prior to the date hereof in
connection with the transactions contemplated hereby.

     8N.  INVESTMENTS.  All mortgage loans owned by the Company as of the date
of this Agreement are Commercial Mortgage Loans which are not in default beyond
any applicable cure periods pursuant to the terms thereof, and the Company has
not extended any of the cure periods provided in the loan documents governing,
evidencing and securing such Commercial Mortgage Loans and originally executed
in connection therewith beyond the applicable cure periods provided in such loan
documents.

     8O.  ENVIRONMENTAL MATTERS.  Except as disclosed on Schedule 8O hereto, the
                                                         -----------            
Company (i) has complied in all material respects with all applicable
Environmental Laws, and the Company has not received (A) notice of any material
failure so to comply, (B) any letter or request for information under Section
104 of CERCLA or comparable state laws or (C) any information that would lead it
to believe that it is the subject of any federal, state or local investigation
concerning Environmental Laws; (ii) does not manage, generate, transport,
discharge or store any Hazardous Material in material violation of any material
Environmental Laws; (iii) does not own, operate or maintain any underground
storage tanks; and (iv) is not aware of any conditions or circumstances
associated with its currently or previously owned or leased properties or
operations (or those of any tenants of such properties) which may give rise to
any liabilities under Environmental Laws which could have a Material Adverse
Effect.

     9.   REPRESENTATIONS OF THE PURCHASER.  You represent that you are not
acquiring the Notes to be purchased by you hereunder with a view to or for sale
in connection with any distribution thereof within the meaning of the Securities
Act, provided that the disposition of your property shall at all times be and
remain within your control. You understand that the Notes have not been
registered under the Securities Act and may be resold only if registered
pursuant to the provisions of the Securities Act or if an exemption from
registration is available, except under circumstances where neither such
registration nor such an exemption is required by law, and that the Company is
not required to register the Notes.

     10.  DEFINITIONS; ACCOUNTING MATTERS.  For the purpose of this Agreement,
the terms defined in paragraphs 10A and 10B (or within the text of any other
                     --------------     ---                                 
paragraph) shall have the respective meanings specified therein and all
accounting matters shall be subject to determination as provided in paragraph
                                                                    ---------
10C.
- --- 

     10A. YIELD-MAINTENANCE TERMS.

                                       17

 
          "BUSINESS DAY" shall mean any day other than a Saturday, a Sunday or a
     day on which commercial banks in New York City are required or authorized
     to be closed.

          "CALLED PRINCIPAL" shall mean, with respect to any Note, the principal
     of such Note that is to be prepaid pursuant to paragraph 4 or is declared
                                                    -----------               
     to be immediately due and payable pursuant to paragraph 7A, as the context
                                                   ------------                
     requires.

          "DISCOUNTED VALUE" shall mean, with respect to the Called Principal of
     any Note, the amount obtained by discounting all Remaining Scheduled
     Payments with respect to such Called Principal from their respective
     scheduled due dates to the Settlement Date with respect to such Called
     Principal, in accordance with accepted financial practice and at a discount
     factor (as converted to reflect the periodic basis on which interest on the
     Notes is payable, if interest is payable other than on a semi-annual basis)
     equal to the Reinvestment Yield with respect to such Called Principal.

          "REINVESTMENT YIELD" shall mean, with respect to the Called Principal
     of any Note, the offered-side yield to maturity, as of 10:00 a.m. (New York
     City time) on the Business Day next preceding the Settlement Date with
     respect to such Called Principal, of the U.S. Treasury security that was
     used to determine the then Treasury of such Investment Note.

          "REMAINING AVERAGE LIFE" shall mean, with respect to the Called
     Principal of any Note, the number of years (calculated to the nearest one-
     twelfth year) obtained by dividing (i) such Called Principal into (ii) the
     sum of the products obtained by multiplying (a) each Remaining Scheduled
     Payment of such Called Principal (but not of interest thereon) by (b) the
     number of years (calculated to the nearest one-twelfth year) which will
     elapse between the Settlement Date with respect to such Called Principal
     and the scheduled due date of such Remaining Scheduled Payment.

          "REMAINING SCHEDULED PAYMENTS" shall mean, with respect to the Called
     Principal of any Note, all payments of such Called Principal and interest
     thereon that would be due on or after the Settlement Date through and
     including the Rate Reset Date (assuming that the entire principal balance
     and all accrued interest as of such Rate Reset Date will be repaid on such
     Rate Reset Date), if the Settlement Date precedes such Rate Reset Date, or
     alternatively, the Maturity Date if the Settlement Date occurs after the
     Rate Reset Date.

          "SETTLEMENT DATE" shall mean, with respect to the Called Principal of
     any Note, the date on which such Called Principal is to be prepaid pursuant
     to paragraph 4 or is declared to be immediately due and payable pursuant to
        -----------                                                             
     paragraph 7A, as the context requires.
     ------------                          

                                       18

 
          "YIELD-MAINTENANCE AMOUNT" shall mean, with respect to any Note, an
     amount equal to the excess, if any, of the Discounted Value of the Called
     Principal of such Note over the sum of (i) such Called Principal plus (ii)
     to the extent paid on the Settlement Date with the Called Principal,
     interest accrued thereon as of (including interest due on) the Settlement
     Date with respect to such Called Principal. The Yield-Maintenance Amount
     shall in no event be less than zero.

     10B. OTHER TERMS.

          "ABS" shall mean mortgage, or other asset backed securities.

          "AFFILIATE" shall mean any Person directly or indirectly controlling,
     controlled by, or under direct or indirect common control with, the
     Company.  A Person shall be deemed to control a corporation if such Person
     possesses, directly or indirectly, the power to direct or cause the
     direction of the management and policies of such corporation, whether
     through the ownership of voting securities, by contract or otherwise.

          "BANKRUPTCY LAW" shall have the meaning specified in clause (viii) of
                                                               -------------   
     paragraph 7A.
     ------------ 

          "BIG FIVE ACCOUNTING FIRM" shall mean any of Arthur Andersen, Deloitte
     & Touche, KPMG Peat Marwick, PricewaterhouseCoopers and Ernst & Young.

          "BP PARTY" shall mean Boston Properties Limited Partnership, a
     Delaware limited partnership, and any Affiliate thereof, and shall also
     include, in all events, One Embarcadero Center Venture, a California
     general partnership.

          "CASH FLOW"  shall mean, in respect of any period, the sum of (a) Net
     Income for such period and (b) the amount of all depreciation and
     amortization allowances and other non-cash expenses of the Company but only
     to the extent deducted in the determination of Net Income for such period.

          "CERCLA" shall mean the Comprehensive Environmental Response,
     Compensation and Liability Act of 1980, as amended.

          "CODE" shall mean the Internal Revenue Code of 1986, as amended.

          "COMMERCIAL MORTGAGE LOANS" shall mean commercial mortgage loans made
     in substantial conformance with (x) standards prevailing in the commercial
     loan mortgage marketplace and (y) the guidelines contained in Exhibit C
                                                                   ---------
     hereto.

          "CURRENT DEBT" shall mean, with respect to the Company, all
     Indebtedness for borrowed money which by its terms or by the terms of any
     instrument or 

                                       19

 
     agreement relating thereto matures on demand or within one year from the
     date of the creation thereof and is not directly or indirectly renewable or
     extendible at the option of the debtor to a date more than one year from
     the date of the creation thereof, provided that Indebtedness for borrowed
     money outstanding under a revolving credit or similar agreement which
     obligates the lender or lenders to extend credit over a period of more than
     one year shall constitute Funded Debt and not Current Debt, even though
     such Indebtedness by its terms matures on demand or within one year from
     the date of the creation thereof.

          "DEBT" shall mean Current Debt and Funded Debt.

          "DEBT SERVICE" shall mean, with respect to any period, the sum of the
     following: (a) Interest Charges for such period, and (b) all payments of
     principal in respect of Debt of the Company paid or payable during such
     period.

          "DEBT SERVICE COVERAGE RATIO" shall mean, at any time of
     determination, the ratio of (a) Cash Flow for the most recent fiscal
     quarter to (b) Debt Service for such fiscal quarter.

          "DEFAULT" shall mean any of the events specified in paragraph 7A,
                                                              ------------ 
     whether or not any requirement for such event to become an Event of Default
     has been satisfied.

          "DUFF & PHELPS" shall mean Duff & Phelps Corporation.

          "ENVIRONMENTAL LAWS" shall mean all laws relating to pollution, the
     release or other discharge, handling, disposition or treatment of Hazardous
     Materials and other substances or the protection of the environment or of
     employee health and safety, including, without limitation, CERCLA, the
     Hazardous Material Transportation Act (49 U.S.C. Section 1801 et. seq.),
     the Resource Conservation and Recovery Act (42 U.S.C. Section 7401 et.
     seq.), the Clean Air Act (42 U.S.C. Section 401 et. seq.), the Toxic
     Substances Control Act (15 U.S.C. Section 651 et. seq.) and the Emergency
     Planning and Community Right-To-Know Act (42 U.S.C. Section 11001 et.
     seq.), each as the same may be amended and supplemented.

          "EVENT OF DEFAULT" shall mean any of the events specified in paragraph
                                                                       ---------
     7A, provided that there has been satisfied any requirement in connection
     --                                                                      
     with such event for the giving of notice, or the lapse of time, or the
     happening of any further condition, event or act.

          "EQUITY REDEMPTION LOAN" shall mean that certain loan in the aggregate
     principal amount of $328,143,000 by Bankboston. N.A., The Chase Manhattan
     Bank, Fleet National Bank, PNC Bank, National Association, Dresdner Bank AG
     New York Branch and Grand Cayman Branch, The Bank of New York, Key Bank

                                       20

 
     National Association and Citizens Bank (and the other banks which may
     become parties to the Term Loan Agreement described immediately below) to
     you, One Embarcadero Center Venture, Three Embarcadero Center Venture and
     Four Embarcadero Center Venture pursuant to that certain Term Loan
     Agreement dated as of November 12, 1998.

          "EXCHANGE ACT" shall mean the Securities Exchange Act of 1934, as
     amended.

          "FITCH" shall mean Fitch IVCA, Inc.

          "FUNDED DEBT" shall mean, with respect to any Person, all Indebtedness
     of such Person which by its terms or by the terms of any instrument or
     agreement relating thereto matures, or which is otherwise payable or
     unpaid, more than one year from, or is directly or indirectly renewable or
     extendible at the option of the debtor to a date more than one year
     (including an option of the debtor under a revolving credit or similar
     agreement obligating the lender or lenders to extend credit over a period
     of more than one year) from, the date of the creation thereof, including
     current maturities of long-term debt that appear as current liabilities in
     accordance with GAAP.

          "GAAP" shall have the meaning set forth in paragraph 10C.
                                                     ------------- 

          "GOOD FAITH CONTEST" shall mean, with respect to any tax, assessment,
     Lien, obligation, claim, liability, judgment, injunction, award, decree,
     order, law, regulation, statute or similar item, any challenge or contest
     thereof by appropriate proceedings timely initiated in good faith by the
     Company for which adequate reserves therefor have been taken in accordance
     with GAAP.

          "GUARANTEE" shall mean, with respect to any Person, any direct or
     indirect liability, contingent or otherwise, of such Person with respect to
     any indebtedness, lease, dividend or other obligation of another,
     including, without limitation, any such obligation directly or indirectly
     guaranteed, endorsed (otherwise than for collection or deposit in the
     ordinary course of business) or discounted or sold with recourse by such
     Person, or in respect of which such Person is otherwise directly or
     indirectly liable, including, without limitation, any such obligation in
     effect guaranteed by such Person through any agreement (contingent or
     otherwise) to

          (i)  purchase, repurchase or otherwise acquire such obligation or any
     security therefor, or to provide funds for the payment or discharge of such
     obligation (whether in the form of loans, advances, stock purchases,
     capital contributions or otherwise);

          (ii) maintain the solvency or any balance sheet or other financial
     condition of the obligor of such obligation; or

                                       21

 
          (iii) pay the purchase price for goods or services regardless of the
     non-delivery or non-furnishing thereof, in any such case if the purpose,
     intent or effect of such agreement is to provide assurance that such
     obligation will be paid or discharged, or that any agreements relating
     thereto will be complied with, or that the holders of such obligation will
     be protected against loss in respect thereof.

     The amount of any Guarantee shall be equal to the outstanding principal
     amount of the obligation guaranteed or such lesser amount to which the
     maximum exposure of the guarantor shall have been specifically limited.

          "HAZARDOUS MATERIALS"  shall mean (i) any material or substance
     defined as or included in the definition of "hazardous substances",
     "hazardous wastes", "hazardous material", "toxic substances" or any other
     formulations intended to define, list or classify substances by reason of
     their deleterious properties, (ii) any oil, petroleum or petroleum derived
     substance, (iii) any flammable substances or explosives, (iv) any
     radioactive materials, (v) asbestos in any form, (vi) electrical equipment
     that contains any oil or dielectric fluid containing levels or
     polychlorinated biphenyls in excess of 50 parts per million, (vii)
     pesticides or (viii) any other chemical, material or substance, exposure to
     which is prohibited, limited or regulated by any governmental agency or
     authority or which may or could pose a hazard to the health and safety of
     persons in the vicinity thereof.

          "INCLUDING" shall mean, unless the context clearly requires otherwise,
     "including without limitation".

          "INDEBTEDNESS" shall mean, with respect to any Person and without
     duplication (i) all items (excluding items of contingency reserves or of
     reserves for deferred income taxes) which in accordance with GAAP would be
     included in determining total liabilities as shown on the liability side of
     a balance sheet of such Person as of the date on which Indebtedness is to
     be determined, other than Preferred Stock of such Person except as set
     forth in clause (iv) below; (ii) all indebtedness secured by any Lien on,
              -----------                                                     
     or payable out of the proceeds or production from, any property or asset
     owned or held by such Person, whether or not the indebtedness secured
     thereby shall have been assumed, (iii) all indebtedness of third parties,
     including joint ventures and partnerships of which such Person is a
     venturer or general partner, recourse to which may be had against such
     Person, (iv) redemption obligations in respect of mandatorily redeemable
     Preferred Stock; and (v) all indebtedness and other obligations of others
     with respect to which such Person has become liable by way of a Guarantee.

          "INITIAL TREASURY" shall mean, for any Note, the yield to maturity
     implied by (i) the bid-side yields reported, as of 10:00am (New York City
     time) (or, at your election, at such other time as we may mutually agree)
     on the Business Day next preceding the date upon which such Note is funded,
     on the display designated as 

                                       22

 
     "Page 678" on the Telerate Access Service, for actively traded U.S.
     Treasury securities having a maturity equal to the Rate Reset Date of such
     Note, or if such bid-side yields shall not be reported as of such time or
     the yields reported as of such time shall not be ascertainable, (ii) the
     Treasury Constant Maturity Series bid-side yields reported, for the latest
     day for which such yields shall have been so reported as of the Business
     Day next preceding the date upon which such Note is funded in Federal
     Reserve Statistical Release H.15 (519) (or any comparable successor
     publication) for actively traded U.S. Treasury securities having a constant
     maturity equal to the Rate Reset Date of such Note. Such implied yields
     shall be determined, if necessary, by (a) converting U.S. Treasury bill
     quotations to bond-equivalent yields in accordance with accepted financial
     practice and (b) interpolating linearly between yields reported for various
     maturities. Notwithstanding the foregoing, subject to the Company's written
     approval (which approval shall not be unreasonably withheld or delayed),
     you shall be entitled to select a different actively traded U.S. Treasury
     security (which shall have a maturity date approximately equal and
     reasonably comparable to the first Rate Reset Date of such Note) the bid-
     side yield to maturity of which shall be the Initial Treasury for purposes
     of such Note; provided, however, that if you select a different U.S.
                   --------  -------      
     Treasury security which is approved by the Company pursuant to the
     foregoing or if a time other than 10:00 a.m. is used to determine the
     Initial Treasury, then the Margin for such Note shall be adjusted so that
     the interest rate on such Investment Note is no different than if you had
     not exercised your rights pursuant to this sentence to select a different
     U.S. Treasury or to agree to a different time for determining the Initial
     Treasury. Schedule 1 sets forth the definitive Initial Treasury for each
               ----------               
     Note.

          "INSTITUTIONAL INVESTOR" shall mean any insurance company, commercial,
     investment or merchant bank, finance company, mutual fund, registered money
     or asset manager, savings and loan association, credit union, registered
     investment advisor, pension fund, investment company, licensed broker-
     dealer, "qualified institutional buyer" (as such term is defined under Rule
     144A promulgated under the Securities Act, or any successor law, rule or
     regulation) or "accredited investor" (as such term is defined under
     Regulation D promulgated under the Securities Act, or any successor law,
     rule or regulation).

          "INTANGIBLES" shall mean, without duplication, all Intellectual
     Property and operating agreements, treasury stock, deferred or capitalized
     research and development costs, goodwill (including any amounts, however
     designated, representing the cost of acquisition of business and
     investments in excess of the book value thereof), unamortized debt discount
     and expense, any write-up of asset value after June 30, 1997 and any other
     amounts reflected in contra-equity accounts, and any other assets treated
     as intangible assets under GAAP.

          "INTELLECTUAL PROPERTY" shall mean all patents, trademarks, service
     marks, trade names, copyrights, brand names, mechanical or technical
     processes and 

                                       23

 
     paradigms, know-how, and similar intellectual property and applications,
     licenses and similar rights in respect of the same.

          "INTEREST CHARGES" shall mean, with respect to any period, the sum
     (without duplication) of the following: (a) all interest in respect of Debt
     of the Company deducted in determining Net Income for such period, and (b)
     all debt discount and expense amortized or required to be amortized in the
     determination of Net Income for such period.

          "INVESTMENTS" shall have the meaning provided in paragraph 6C(3).
                                                           --------------- 

          "LIEN" shall mean any mortgage, pledge, security interest,
     encumbrance, minimum or compensating deposit arrangement, lien (statutory
     or otherwise) or charge of any kind (including any agreement to give any of
     the foregoing, any conditional sale or other title retention agreement, any
     lease in the nature thereof, and the filing of or agreement to give any
     financing statement under the Uniform Commercial Code of any jurisdiction)
     or any other type of preferential arrangement for the purpose, or having
     the effect, of protecting a creditor against loss or securing the payment
     or performance of an obligation.

          "MARGIN" shall mean, for any Note, 165 basis points; provided that, if
                                                               -------- ----    
     you select, for purposes of determining the Initial Treasury, a different
     U.S. Treasury security from the U.S Treasury selected by the Company
     or if a time other than 10:00 a.m. is used to determine the Initial
     Treasury, in either case pursuant to your rights as described in the
     definition of Initial Treasury, then the Margin during the period of time
     commencing on the funding of the Investment Note until the first Rate Reset
     Date thereunder shall be adjusted as described in the last sentence of the
     definition of Initial Treasury and, from and after the first Rate Reset
     Date, the Margin shall again adjust to equal 165 basis points.  Schedule 1
                                                                     ----------
     sets forth the definitive initial Margin for each Note through the first
     Rate Reset Date of each Note.

          "MATERIAL ADVERSE EFFECT" shall mean (i) a material adverse effect on
     the business, assets, liabilities, operations, prospects or condition,
     financial or otherwise, of the Company, (ii) material impairment of the
     Company to perform any of its obligations under the Agreement and the Notes
     or (iii) material impairment of the validity or enforceability or the
     rights of, or the benefits available to, the holders of the Notes under
     this Agreement or the Notes.

          "MATURITY DATE" shall have the meaning set forth in paragraph 1
                                                              -----------
     hereof.

          "MOODY'S" shall mean Moody's Investors Services, Inc., including the
     NCO/Moody's Commercial Division, or any successor Person.

                                       24

 
          "NET INCOME" shall mean, as to any period, consolidated gross revenues
     of the Company less all operating and non-operating expenses of the Company
     for such period, including all charges of a proper character (including
     current and deferred taxes on income, provision for taxes on unremitted
     foreign earnings which are included in gross revenues, and current
     additions to reserves), but not including in gross revenues the following:

          (i)    any gains (net of expenses and taxes applicable thereto) in
     excess of losses resulting from the Transfer of capital assets (i.e.,
     assets other than current assets);

          (ii)   any gains resulting from the write-up of assets;

          (iii)  any equity of the Company in the undistributed earnings (but
     not losses) of any corporation which is not a Subsidiary;

          (iv)   any earnings or losses of any Person acquired by the Company
     through purchase, merger, consolidation or otherwise for any fiscal period
     prior to the fiscal period in which the acquisition occurs;

          (v)    gains or losses from the acquisition of securities or the
     retirement or extinguishment of Debt;

          (vi)   gains on collections from insurance policies or settlements;

          (vii)  any income or gain during such period from any change in
     accounting principles, from any discontinued operations or the disposition
     thereof, from any extraordinary items or from any prior period adjustment;

          (viii) in the case of a successor to the Company by consolidation or
     merger or as a transferee of its assets, any earnings of the successor
     corporation prior to such consolidation, merger or transfer of assets.

     If the preceding calculation results in a number less than zero, such
     amount shall be considered a net loss.

          "OFFICER'S CERTIFICATE" shall mean a certificate signed in the name of
     the Company by its President, one of its Vice Presidents or its Treasurer.

          "OTHER EC NOTES" shall mean those certain senior promissory notes of
     the Company issued by the Company on the date hereof to (a) One Embarcadero
     Center Venture in the aggregate principal amount of $88,200,000 (b) Three
     Embarcadero Center Venture in the aggregate principal amount of $76,897,000
     and (c) Four Embarcadero Center Venture in the aggregate principal amount
     of $143,119,000.

                                       25

 
          "PERMITTED INVESTMENTS" shall have the meaning set forth in paragraph
                                                                      ---------
     6C(3).
     ----- 

          "PERMITTED LIENS" shall have the meaning set forth in paragraph 6C(1).
                                                                --------------- 

          "PERSON" shall mean and include an individual, a partnership, a joint
     venture, a corporation, a limited liability company, a trust, an
     unincorporated organization and a government or any department or agency
     thereof.

          "PHASE ONE" shall mean the closing and consummation of the
     transactions described in that certain Master Transaction Agreement dated
     as of September 28, 1998, by and among Prudential, PIC Realty Corporation,
     Fedmark Corporation, Embarcadero Center Investors Partnership, Pacific
     Property Services, L.P., the Persons listed on Exhibit A-1 attached
     thereto, Boston Properties Limited Partnership and Boston Properties, Inc.,
     which are to be consummated on the "Closing Date" (as defined in such
     Master Transaction Agreement).

          "PRUDENTIAL" shall mean The Prudential Insurance Company of America, a
     New Jersey mutual insurance company.

          "PRUDENTIAL GUARANTIED LOAN"  shall mean that certain loan in the
     aggregate principal amount of $92,000,000 by The Chase Manhattan Bank
     and/or any of its subsidiaries or affiliates (the "BANK") to you, One
     Embarcadero Center Venture, Three Embarcadero Center Venture and Four
     Embarcadero Center Venture pursuant to that certain Term Loan Agreement
     dated as of November 12, 1998.

          "RATE RESET DATE", with respect to any Note, shall have the meaning
     set forth in such Note.

          "RATED BANK" shall have the meaning set forth in paragraph 6C(3)(ii).
                                                           ------------------- 

          "RELEASE" shall mean any release, spill, emission, leaking, pumping,
     injection, deposit, disposal, discharge, leaching or migration into the
     indoor or outdoor environment, including, without limitation, the movement
     of Hazardous Materials through ambient air, soil, surface water, ground
     water, wetlands, land or subsurface strata, in violation of applicable law
     or prudent business practice.

          "REQUIRED HOLDER(S)" shall mean the holder or holders of at least 51%
     of the aggregate principal amount of the Notes from time to time
     outstanding, but shall include, in any event, the BP Parties so long as any
     BP Party holds a direct or indirect interest in any Note.

          "RESET TREASURY" shall mean the yield to maturity implied by (i) the
     yields reported, as of 10:00am (New York City time) on the Business Day
     next preceding 

                                       26

 
     the Rate Reset Date for any Note, on the display designated as "Page 678"
     on the Telerate Access Service, for actively traded U.S. Treasury
     securities having a maturity equal to the earlier to occur of the next Rate
     Reset Date provided for in such Note (if any) and the Maturity Date of such
     Note, or if such yields shall not be reported as of such time or the yields
     reported as of such time shall not be ascertainable, (ii) the Treasury
     Constant Maturity Series yields reported, for the latest day for which such
     yields shall have been so reported as of the Business Day next preceding
     the Rate Reset Date in Federal Reserve Statistical Release H.15 (519) (or
     any comparable successor publication) for actively traded U.S. Treasury
     securities having a constant maturity equal to the earlier to occur of the
     next Rate Reset Date provided for in such Note (if any) or the Maturity
     Date of such Note. Such implied yields shall be determined, if necessary,
     by (a) converting U.S. Treasury bill quotations to bond-equivalent yields
     in accordance with accepted financial practice and (b) interpolating
     linearly between yields reported for various maturities.

          "RESPONSIBLE OFFICER" shall mean the chief executive officer, chief
     operating officer, chief financial officer or chief accounting officer of
     the Company or any other officer of the Company involved principally in its
     financial administration or its controllership function.

          "RESTRICTED INVESTMENT" shall mean any Investment other than a
     Permitted Investment.

          "RESTRICTED PAYMENTS" shall mean any of the following (provided that,
     notwithstanding anything to the contrary stated below, the term "Restricted
     Payments" does not include any distribution of capital gains by the Company
     to its shareholders):

          (i)   any dividend on any class of the Company's capital stock at any
     time after the date hereof;

          (ii)  any other distribution on account of any class of the Company's
     capital stock;

          (iii) any redemption, purchase or other acquisition, direct or
     indirect, of any shares of the Company's capital stock;

          (iv)  any unscheduled payment of principal of, or retirement,
     redemption, purchase or other acquisition of, any subordinated debt,
     including subordinated debt that is convertible into equity of the Company;

          (v)   any Restricted Investment;

          "S&P" shall mean Standard and Poor's Corporation, or any successor
     Person.

                                       27

 
          "SECURITIES ACT" shall mean the Securities Act of 1933, as amended.

          "SHAREHOLDER" shall mean and include any Person who owns, beneficially
     or of record, directly or indirectly, at any time during any year with
     respect to which a computation is being made 5% or more of the outstanding
     voting stock of the Company.

          "SIGNIFICANT HOLDER" shall mean (i) any BP Party, so long as any BP
     Party shall hold (or be committed under this Agreement to purchase) any
     Note, or (ii) any other holder of at least 5% of the aggregate principal
     amount of the Notes from time to time outstanding.

          "SUBSIDIARY" shall mean any corporation or other entity at least 51%
     of the total combined voting power of all classes of Voting Stock or
     similar securities of which shall, at the time as of which any
     determination is being made, be owned by the Company either directly or
     through Subsidiaries.

          "TOTAL ASSETS" shall mean, as at any time of determination, the total
     assets of a Person recorded on a balance sheet of such Person prepared in
     accordance with GAAP.

          "TRANSFER" shall mean, with respect to any item, the sale, exchange,
     conveyance, lease, transfer or other disposition of such item.

          "TRANSFEREE" shall mean any direct or indirect transferee of all or
     any part of any Note purchased by you under this Agreement.

          "TREASURY" shall mean, for any Note, the Initial Treasury or the then
     Reset Treasury, as the case may be, upon which the Margin under such Note
     is added to obtain the interest rate of such Note.

          "VOTING STOCK" shall mean, with respect to any corporation, any shares
     of stock of such corporation whose holders are entitled under ordinary
     circumstances to vote for the election of directors of such corporation
     (irrespective of whether at the time stock of any other class or classes
     shall have or might have voting power by reason of the happening of any
     contingency), and, with respect to any other entity, any similar security
     of such entity.

     10C. ACCOUNTING AND LEGAL PRINCIPLES, TERMS AND  DETERMINATIONS.  All
references in this Agreement to "GAAP" shall mean generally accepted accounting
principles, as in effect in the United States from time to time.  Unless
otherwise specified herein, all accounting terms used herein shall be
interpreted, all determinations with respect to accounting matters hereunder
shall be made, and all unaudited financial statements and certificates and
reports as to financial matters required to be furnished hereunder shall be

                                       28

 
prepared, in accordance with GAAP (except as set forth in the next succeeding
sentence of this paragraph 10C), applied on a basis consistent with the most
                 -------------                                              
recent audited financial statements of the Company delivered pursuant to
paragraph 5A(i) or (ii) or, if no such statements have been so delivered, the
- ---------------    ----                                                      
most recent audited financial statements referred to in clause (i) of paragraph
                                                        ----------    ---------
8B.  Notwithstanding the foregoing, however, quarterly financial statements
- --                                                                         
shall not include notes to financial statements and to that extent such
statements will not have been prepared in accordance with GAAP.  Any reference
herein to any specific citation, section or form of law, statute, rule or
regulation shall refer to such new, replacement or analogous citation, section
or form should citation, section or form be modified, amended or replaced.


     11.  MISCELLANEOUS.

     11A. NOTE PAYMENTS. The Company agrees that, so long as you shall hold any
Note, it will make payments of principal of, interest on and any Yield-
Maintenance Amount payable with respect to such Note, which comply with the
terms of this Agreement, by wire transfer of immediately available funds for
credit (not later than 12:00 noon, New York City time, on the date due) to your
account or accounts as specified in the Purchaser Schedule attached hereto, or
such other account or accounts in the United States as you may designate in
writing, notwithstanding any contrary provision herein or in any Note with
respect to the place of payment. You agree that, before disposing of any Note,
you will make a notation thereon (or on a schedule attached thereto) of all
principal payments previously made thereon and of the date to which interest
thereon has been paid. Upon written request of the Company made concurrently
with or reasonably promptly after payment or prepayment in full of any Note, you
shall surrender such Note for cancellation, reasonably promptly after any such
request, to the Company at its principal executive office. The Company agrees to
afford the benefits of this paragraph 11A to any Transferee which shall have
                            -------------                                   
made the same agreement as you have made in this paragraph 11A.
                                                 ------------- 

     11B. EXPENSES.  The Company agrees, whether or not the transactions
contemplated hereby shall be consummated, to pay, and save you and any
Transferee harmless against liability for the payment of, all reasonable out-of-
pocket costs and expenses arising in connection with such transactions,
including:

          (i)  (A) all stamp and documentary taxes and similar charges and (B)
     costs of obtaining a private placement number for the Notes in each case as
     a result of the execution and delivery of this Agreement or the issuance of
     the Notes;

          (ii) document production and duplication charges and the reasonable
     fees and expenses of any special counsel engaged by you or such Transferee
     in connection with this Agreement and the transactions contemplated hereby;

                                       29

 
          (iii) the costs and expenses, including reasonable attorneys' fees,
     incurred by you or such Transferee in enforcing any rights under this
     Agreement or the Notes; and

          (iv)  any judgment, liability, claim, order, decree, cost, fee,
     expense, action or obligation resulting directly from the consummation of
     the transactions contemplated hereby, including the use of the proceeds of
     the Notes by the Company;

     provided that the Company shall not be responsible for (1) any of your
     --------                                                              
     expenses or those of a Transferee incurred solely in connection with any
     transfer of any Note or (2) the fees and expenses of more than one counsel
     for the holders of the Notes, except to the extent the Required Holders
     determine that (a) either legal advice is needed in a jurisdiction other
     than that specified in paragraph 11L or (b) there exists a conflict of
                            -------------                                  
     interest amongst the holders of the Notes.  The obligations of the Company
     under this paragraph 11B shall survive the transfer of any Note or portion
                -------------                                                  
     thereof or interest therein by you or any Transferee and the payment of any
     Note.

     11C. CONSENT TO AMENDMENTS.  This Agreement may be amended, and the Company
may take any action herein prohibited, or omit to perform any act herein
required to be performed by it, if the Company shall obtain the written consent
to such amendment, action or omission to act, of the Required Holder(s); except
                                                                         ------
that, (i) without the written consent of the holder or holders of all Notes at
- ----                                                                          
the time outstanding, no amendment to this Agreement shall change the maturity
of any Note, or change the principal of, or the rate, method of computation or
time of payment of interest on or any Yield-Maintenance Amount payable with
respect to any Note, or affect the time, amount or allocation of any
prepayments, or change the proportion of the principal amount of the Notes
required with respect to any consent, amendment, waiver or declaration, and (ii)
so long as any BP Holder holds any Note(s), no amendment, action or omission to
act shall amend, modify or otherwise affect such BP Party's rights under the
Note(s) that it holds (or its rights under this Agreement to the extent relating
to such BP Party's Note(s)) without such BP Party's written consent.  Each
holder of any Note at the time or thereafter outstanding shall be bound by any
consent authorized by this paragraph 11C, whether or not such Note shall have
                           -------------                                     
been marked to indicate such consent, but any Notes issued thereafter may bear a
notation referring to any such consent.  No course of dealing between the
Company and the holder of any Note nor any delay in exercising any rights
hereunder or under any Note shall operate as a waiver of any rights of any
holder of such Note.  As used herein and in the Notes, the term "this Agree
ment" and references thereto shall mean this Agreement as it may from time to
time be amended or supplemented.

     11D. FORM, REGISTRATION, TRANSFER AND EXCHANGE OF NOTES; LOST NOTES.  The
Notes are issuable as registered notes without coupons in denominations of at
least $1,000,000, except as may be necessary to (i) reflect any principal amount
not evenly divisible by $1,000,000 or (ii) enable the registration of transfer
by a holder of its entire holding of Notes.  The Company shall keep at its
principal office a register in which the 

                                       30

 
Company shall provide for the registration of Notes and of transfers of Notes.
Upon surrender for registration of transfer of any Note at the principal office
of the Company, the Company shall, at its expense, execute and deliver one or
more new Notes of like tenor and of a like aggregate principal amount,
registered in the name of such transferee or transferees. At the option of the
holder of any Note, such Note may be exchanged for other Notes of like tenor and
of any authorized denominations, of a like aggregate principal amount, upon
surrender of the Note to be exchanged at the principal office of the Company.
Whenever any Notes are so surrendered for exchange, the Company shall, at its
expense, execute and deliver the Notes which the holder making the exchange is
entitled to receive. Every Note surrendered for registration of transfer or
exchange shall be duly endorsed, or be accompanied by a written instrument of
transfer duly executed, by the holder of such Note or such holder's attorney
duly authorized in writing. Any Note or Notes issued in exchange for any Note or
upon transfer thereof shall carry the rights to unpaid interest and interest to
accrue which were carried by the Note so exchanged or transferred, so that
neither gain nor loss of interest shall result from any such transfer or
exchange. Upon receipt of written notice from the holder of any Note of the
loss, theft, destruction or mutilation of such Note and, in the case of any such
loss, theft or destruction, upon receipt of such holder's indemnity agreement
(which shall be unsecured if such holder is an Institutional Investor whose
senior debt securities are rated BBB- or Baa3 or better by S&P or Moody's,
respectively, and, otherwise, which shall be unsecured unless the Company
requests in writing that such indemnity agreement be secured), or in the case of
any such mutilation upon surrender and cancellation of such Note, the Company
will make and deliver a new Note, of like tenor, in lieu of the lost, stolen,
destroyed or mutilated Note. The Company shall give to any holder of a Note that
is an Institutional Investor promptly upon request therefor, a complete and
correct copy of the names and addresses of all registered holders of Notes.

     The Company may require payment of a sum sufficient to cover any stamp tax
or governmental charge imposed in respect of any such transfer of Notes.

     11E. TRANSFER OF NOTES; PERSONS DEEMED OWNERS.  Subject to the next
succeeding sentence, you may transfer any Note or portion thereof in your sole
discretion; provided, however, that any Transferee shall be an Institutional
Investor.  Prior to due presentment for registration of transfer, the Company
may treat the Person in whose name any Note is registered as the owner and
holder of such Note for the purpose of receiving payment of principal of,
interest on and any Yield-Maintenance Amount payable with respect to such Note
and for all other purposes whatsoever, whether or not such Note shall be
overdue, and the Company shall not be affected by notice to the contrary.

     11F. SURVIVAL OF REPRESENTATIONS AND WARRANTIES; ENTIRE AGREEMENT.  All
representations and warranties contained herein or made in writing by or on
behalf of the Company in connection herewith shall survive the execution and
delivery of this Agreement and the Notes, the transfer by you of any Note or
portion thereof or interest therein and the payment of any Note, and may be
relied upon by any Transferee, regardless of any investigation made at any time
by or on behalf of you or any Transferee. Subject to the preceding

                                       31

 
sentence, this Agreement and the Notes embody the entire agreement and
understanding between you and the Company and supersede all prior agreements and
understandings between you and the Company relating to the subject matter
hereof, and the Company shall not be affected by notice to the contrary. No
provision of this Agreement shall be interpreted for or against any party
because that party or its legal representative drafted the provision.

     11G. SUCCESSORS AND ASSIGNS.  All covenants and other agreements in this
Agreement contained by or on behalf of either of the parties hereto shall bind
and inure to the benefit of the respective successors and assigns of the parties
hereto (including, without limitation, any Transferee) whether so expressed or
not.

     11H. NOTICES.  All written communications provided for hereunder shall be
sent by first class mail or nationwide overnight delivery service (with charges
prepaid) and (i) if to you, addressed to you at the address specified for such
communications in the Purchaser Schedule attached hereto, or at such other
address as you shall have specified to the Company in writing, (ii) if to any
other holder of any Note, addressed to such other holder at such address as such
other holder shall have specified to the Company in writing or, if any such
other holder shall not have so specified an address to the Company, then
addressed to such other holder in care of the last holder of such Note which
shall have so specified an address to the Company, and (iii) if to the Company,
addressed to it at Prudential Realty Group, 8 Campus Drive, Parsippany, New
Jersey 07054, Attention: John Triece, or at such other address as the Company
shall have specified to the holder of each Note in writing; provided, however,
that any such communication to the Company may also, at the option of the holder
of any Note, be delivered by any other means either to the Company at its
address specified above or to any officer of the Company.

     11I. PAYMENTS DUE ON NON-BUSINESS DAYS.  Anything in this Agreement or the
Notes to the contrary notwithstanding, any payment of principal of or interest
on any Note that is due on a date other than a Business Day shall be made on the
next succeeding Business Day.  If the date for any payment is extended to the
next succeeding Business Day by reason of the preceding sentence, the period of
such extension shall be included in the computation of the interest payable on
such Business Day.

     11J. SATISFACTION REQUIREMENT.  If any agreement, certificate or other
writing, or any action taken or to be taken, is by the terms of this Agreement
required to be satisfactory to you or to the Required Holder(s), the
determination of such satisfaction shall be made by you or the Required
Holder(s), as the case may be, in the reasonable judgment of the Person or
Persons making such determination.

     11K. INDEMNIFICATION. The Company hereby agrees to indemnify you and your
directors, officers, employees and agents from, and hold each of them harmless
against, any and all losses, liabilities, claims, damages and expenses arising
out of or by reason of any investigation or litigation or other proceeding
relating to this Agreement, the Notes or the transactions contemplated hereby,
including, without limitation, the reasonable fees and

                                       32

 
disbursements of counsel incurred in connection with any such investigation or
litigation or other proceedings (but excluding any such losses, liabilities,
claims, damages or expenses incurred by reason of the gross negligence or
willful misconduct of the Person to be indemnified).

     11L. GOVERNING LAW.  This Agreement shall be construed and enforced in
accordance with, and the rights of the parties shall be governed by, the law of
the State of New York.

     11M. SEVERABILITY. Any provision of this Agreement which is prohibited or
unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective
to the extent of such prohibition or unenforceability without invalidating the
remaining provisions hereof, and any such prohibition or unenforceability in any
jurisdiction shall not invalidate or render unenforceable such provision in any
other jurisdiction.

     11N. DESCRIPTIVE HEADINGS. The descriptive headings of the several
paragraphs of this Agreement are inserted for convenience only and do not
constitute a part of this Agreement.

     11O. COUNTERPARTS. This Agreement may be executed in any number of
counterparts, each of which shall be an original but all of which together shall
constitute one instrument.



                 (Remainder of Page Intentionally Left Blank)

                                       33

 
     If you are in agreement with the foregoing, please sign the form of
acceptance on the enclosed counterpart of this letter and return the same to the
Company, whereupon this letter shall become a binding agreement between the
Company and you.



                                    Very truly yours,


                                    PRUDENTIAL REALTY
                                    SECURITIES, INC.

                                    By: /s/ Paul D. Egan
                                       ------------------------
                                    Name: Paul D. Egan
                                    Title: Vice President


                                    By:________________________
                                    Name:______________________
                                    Title:_____________________

                                      S-1

 
The forgoing Agreement is
hereby accepted as of the
date first above written

EMBARCADERO CENTER ASSOCIATES, a
California General Partnership

By:  BOSTON PROPERTIES LLC, as
     Managing General Partner

     By:  BOSTON PROPERTIES LIMITED
          PARTNERSHIP, as Manager

          By:  BOSTON PROPERTIES, INC.,
               as General Partner


               By: /s/ Thomas J. O'Connor
                  -------------------------
               Name: Thomas J. O'Connor
               Title: Vice President

                                      S-2

 
                                   EXHIBIT A
                                   ---------

                                [FORM OF NOTES]

                      PRUDENTIAL REALTY SECURITIES, INC.

                       SENIOR NOTE DUE __________, 200_

No. _____                                                             [Date]
$________


     FOR VALUE RECEIVED, the undersigned, PRUDENTIAL REALTY SECURITIES, INC.
(the "COMPANY"), a corporation organized and existing under the laws of the
State of Delaware, hereby promises to pay to EMBARCADERO CENTER ASSOCIATES, a
California general partnership, or registered assigns, the principal sum of
___________________________ DOLLARS ($______________) on _____________, ____
(the "Maturity Date"), with interest (computed on the basis of a 360-day year
comprised of 12 30-day months) on the unpaid balance thereof at the rate of
____% per annum from the date hereof through and including _______, ___ (the
"RATE RESET DATE") and thereafter through and including the Maturity Date, at a
rate of interest per annum equal to the sum of (i) ________ basis points, and
(ii) the Reset Treasury, as defined in the Note Agreement.  All such interest
shall be payable semiannually on the 15/th/ day of June and December in each
year, commencing with the first such date next succeeding the date hereof, until
the principal hereof shall have become due and payable, and shall be payable on
any overdue payment (including any overdue prepayment) of principal, any overdue
payment of interest and any overdue payment of any Yield-Maintenance Amount (as
defined in the Note Agreement), payable semiannually as aforesaid (or, at the
option of the registered holder hereof, on demand), at a rate per annum from
time to time equal to the lesser of (a) the maximum rate permitted by applicable
law and (b) 2.0% over the interest rate then in effect under this Note in
accordance with the foregoing terms and provisions.

     Payments of principal of, interest on and any Yield-Maintenance Amount
payable with respect to this Note are to be made in immediately available funds,
in lawful money of the United States of America, by wire transfer to [_______]
at [NAME OF BANK] in [New York City], ABA #________, Account # __________, or to
such other account or place as the registered holder hereof shall designate to
the Company in writing.

     This Note is one of a series of Senior Notes (the "NOTES") issued pursuant
to a Note Agreement, dated as of November 12, 1998 (the "NOTE AGREEMENT"),
between the Company and One Embarcadero Center Venture and is entitled to the
benefits thereof.

     This Note is a registered Note and, as provided in the Note Agreement, upon
surrender of this Note for registration of transfer, duly endorsed, or
accompanied by a written 

                                      S-1

 
instrument of transfer duly executed, by the registered holder hereof or such
holder's attorney duly authorized in writing, a new Note for a like principal
amount will be issued to, and registered in the name of, the transferee. Prior
to due presentment for registration of transfer, the Company -may treat the
person in whose name this Note is registered as the owner hereof for the purpose
of receiving payment and for all other purposes, and the Company shall not be
affected by any notice to the contrary.

     This Note is subject to optional prepayment, in whole or from time to time
in part, on the terms specified in the Note Agreement.

     If an Event of Default, as defined in the Note Agreement, shall occur and
be continuing, the principal of this Note may be declared or otherwise become
due and payable in the manner and with the effect provided in the Note
Agreement.

     The Company and any and all endorsers, guarantors and sureties severally
waive grace, demand, presentment for payment, notice of dishonor or default,
notice of intent to accelerate, notice of acceleration (to the extent set forth
in the Note Agreement), protest and diligence in collecting.

     THIS NOTE IS INTENDED TO BE PERFORMED IN THE STATE OF NEW YORK AND SHALL BE
CONSTRUED AND ENFORCED IN ACCORDANCE WITH THE LAW OF SUCH STATE.

                              PRUDENTIAL REALTY SECURITIES, INC.



                              By_________________________
                                    [Vice] President


                              By_________________________
                                    Treasurer

 
                                   EXHIBIT C
                                   ---------

                             INVESTMENT GUIDELINES

1. Invest only in investment grade fixed income assets that:

a) are current in payment and not in default (subject to cure periods):

b) minimally provide for interest payments which are (i) monthly in the case of
"non securities" investments (i.e., whole mortgage loans) or (ii) semi-annually
in the case of "securities" investments (i.e. ABS):

c) have a maturity date which is at least thirty months beyond the asset
purchase date:

d) include prepayment premiums providing for yield maintenance or the
substantial equivalent: and

e) on an individual basis, do not exceed 7% of the total portfolio.

2. Make more than 80% of all investment in assets directly secured by first
mortgages.  In addition: (a) no such assets may have a "loan to value" ratio
which exceeds 80%, and at least 90% of such assets shall have a "loan to value"
ratio which is 75% or less and (b) the overall portfolio of such assets shall be
geographically diverse.


 
                                                                   Exhibit 99.13

                      PRUDENTIAL REALTY SECURITIES, INC.
                                8 CAMPUS DRIVE
                         PARSIPPANY, NEW JERSEY 07054


                                                  As of November 12, 1998


THREE EMBARCADERO CENTER VENTURE
C/O BOSTON PROPERTIES, INC.
8 ARLINGTON STREET
BOSTON, MASSACHUSETTS 02116-3495
ATTN: GENERAL COUNCIL

Ladies and Gentlemen:

     The undersigned, PRUDENTIAL REALTY SECURITIES, INC. (herein called the
"COMPANY"), hereby agrees with you as follows:

     1.   AUTHORIZATION OF ISSUE OF NOTES.  The Company will authorize the issue
of up to eight (8) of its senior promissory notes in the aggregate principal
amount of $76,897,000, to be dated the date of issue thereof, to mature in the
case of each Note so issued, subject to the terms and provisions of the next
sentence below, not more than 15 years after the date of original issuance
thereof as set forth in each such Note (the "MATURITY DATE") and listed on
Schedule 1 attached hereto, to bear interest on the unpaid balance thereof from
- ----------                                                                     
the date thereof until the Rate Reset Date or, if such Note does not have a Rate
Reset Date, the Maturity Date for each such Note at the rate per annum equal to
the Initial Treasury plus the Margin, and from the Rate Reset Date (if any) of
any such Note until the principal thereof shall have become due and payable at
the rate per annum equal to the Reset Treasury plus the Margin, and to have such
other particular terms, as shall be specified herein and therein, and to be
substantially in the form of Exhibit A attached hereto. Notwithstanding the
                             ---------                                     
foregoing, each Note shall either mature or have a Rate Reset Date within ten
(10) years after the date of original issuance of such Note.  The term "Notes"
as used herein shall include each such senior promissory note delivered pursuant
to any provision of this Agreement and each such senior promissory note
delivered in substitution or exchange for any other Note pursuant to any such
provision.

     2.   PURCHASE AND SALE OF NOTES.  The Company hereby agrees to sell to you
and, subject to the terms and conditions herein set forth, you agree to purchase
from the Company, Notes in the aggregate principal amount of $76,897,000 at 100%
of such 

                                       1

 
aggregate principal amount. The Company will deliver to you, at the offices of
O'Melveny & Myers LLP at 275 Battery Street, Suite 2600, San Francisco,
California, (or such other location to be determined by mutual agreement between
the Company and you) one or more Notes registered in your name, evidencing the
aggregate principal amount of Notes to be purchased by you and in the
denomination or denominations specified in the Purchaser Schedule attached
hereto, against payment of the purchase price thereof by transfer of immediately
available funds for credit to the Company's account #890-0305-525 at The Bank of
New York, New York, New York, ABA No. 021-000-018 on the date of closing, which
shall be November 12, 1998 or any other date on or before November 13, 1998 upon
which the Company and you may mutually agree (herein called the "CLOSING" or the
"DATE OF CLOSING").

     3.   CONDITIONS OF CLOSING.  Your obligation to purchase and pay for the
Notes to be purchased by you hereunder is subject to the satisfaction, on or
before the date of closing, of the following conditions:

     3A.  EXECUTION AND DELIVERY OF DOCUMENTS.  The Company shall have
delivered, or cause to be delivered, to you duly executed, original or certified
copies of the following documents, each to be dated the date of closing unless
otherwise indicated:

          (i)       the Note(s), originally executed and in substantially the
     form of Exhibit A attached hereto.
             ---------                 

          (ii)      a favorable opinion of Deborah Shulevitz, Esq., counsel to
     the Company (or such other counsel designated by the Company and acceptable
     to you) satisfactory to you and substantially in the form of Exhibit B
                                                                  ---------
     attached hereto and as to such other matters as you may reasonably request.

          (iii)     the Certificate of Incorporation of the Company certified as
     of a date within 10 Business Days of closing by the Secretary of State of
     Delaware.

          (iv)      the Bylaws of the Company certified by the Secretary of the
     Company.

          (v)       an incumbency certificate signed by the Secretary or an
     Assistant Secretary of the Company certifying as to the names, titles and
     true signatures of the officers of the Company authorized to sign this
     Agreement and the Notes and the other documents to be delivered hereunder.

          (vi)      a certificate of the Secretary or Assistant Secretary of the
     Company (A) attaching resolutions of the Board of Directors of the Company
     evidencing approval of the transactions contemplated by this Agreement and
     the issuance of the Notes and the execution, delivery and performance
     thereof, and authorizing certain officers to execute and deliver the same,
     and certifying that such resolutions 

                                       2

 
     were duly and validly adopted at a meeting duly noticed and held and such
     resolutions have not since been amended, revoked or rescinded, (B)
     certifying that no dissolution or liquidation proceedings as to the Company
     have been commenced or are contemplated, and (C) identifying and attaching
     any proposed or effected amendments to or changes in the Certificate of
     Incorporation of the Company since the date of the certified copies thereof
     provided pursuant to clause (iii) above or, if none, so certifying.
                          ------------                                  

          (vii)     (A) the representations and warranties contained in
     paragraph 8 shall be true on and as of the date of closing, except to the
     -----------
     extent of changes caused by the transactions herein contemplated; (B) there
     shall exist on the date of closing no Event of Default or Default and no
     Event of Default or Default will occur by reason of or immediately
     following the sale of the Notes hereunder; (C) no condition, event or act
     that has had or would have a Material Adverse Effect has occurred since
     December 31, 1997, and (D) you shall have received an Officer's Certificate
     certifying as to all of the foregoing.

          (viii)    a corporate good standing certificate as to the Company from
     the State of New Jersey.

          (xi)      additional documents or certificates with respect to such
     legal matters or corporate or other proceedings related to the transactions
     contemplated hereby as may be reasonably requested by you.

     3B.  PURCHASE PERMITTED BY APPLICABLE LAWS.  The purchase of and payment
for the Notes to be purchased by you on the date of closing on the terms and
conditions herein provided (including the use of the proceeds of such Notes by
the Company) shall not violate any applicable law or governmental regulation
(including, without limitation, Section 5 of the Securities Act or Regulation T,
U or X of the Board of Governors of the Federal Reserve System) and shall not
subject you to any tax, penalty, liability or other onerous condition under or
pursuant to any applicable law or governmental regulation, and you shall have
received such certificates or other evidence as you may request to establish
compliance with this condition.

     3C.  PROCEEDINGS.  All corporate and other proceedings taken or to be taken
in connection with the transactions contemplated hereby and all documents
incident thereto shall be satisfactory in substance and form to you, and you
shall have received all such counterpart originals or certified or other copies
of such documents as you may reasonably request.

     3D.  RATING.  The Company shall have obtained a rating of the Notes, as of
a date not more than 30 days prior to the closing hereof, of A or better from
S&P and the equivalent rating from Fitch and shall provide written evidence of
the same.

                                       3

 
     3E.  PHASE ONE TRANSACTIONS.  Phase One of the transactions shall have been
completed or shall be consummated concurrently with the consummation of the
transactions described herein.

     3F.  EQUITY REDEMPTION AND PRUDENTIAL GUARANTIED LOANS.  You shall have
obtained the Prudential Guarantied Loan and Equity Redemption Loan or the
closing of such loans shall occur concurrently with the closing of the
transactions contemplated herein; and the lenders of the Prudential Guarantied
Loan and Equity Redemption Loan shall have made available to you in full the
proceeds of the Prudential Guarantied Loan and Equity Redemption Loan.

     4.   PREPAYMENTS.  The Notes are not prepayable during the first year of
the term thereof.  The Notes shall be subject to prepayment, in whole or in part
at any time after the first anniversary date of this Agreement, at the option of
the Company, at 100% of the principal amount so prepaid plus accrued interest
thereon to the prepayment date and the Yield-Maintenance Amount, if any, under
the applicable Note with respect to the principal amount so prepaid; provided,
however, that any prepayment, whether in whole or in part, made on a Rate Reset
Date shall be payable without any Yield-Maintenance Amount.  If the Company
elects to prepay any of the Notes at any time while any BP Party holds any
Notes, the Company shall first offer to prepay all Notes then held by such BP
Party(ies) before offering to prepay any Notes held by any other Person.  Within
three (3) business days after delivery to it of any such offer of prepayment,
each such BP Party shall provide the Company written notice of its election to
either have such BP Party's Notes prepaid first or to have the Notes held by
other Persons prepaid prior to the Notes held by such BP Party; provided that,
                                                                -------- ---- 
notwithstanding the election of any such BP Party to have Notes held by other
Persons paid first, the Company may prepay any portion of such BP Party's Notes
once the Company has prepaid in full all Notes held by such other Persons.  The
failure of any BP Party to provide such notice to the Company within such three
(3) business day period shall be deemed an election to prepay such BP Party's
Notes first.

     5.   AFFIRMATIVE COVENANTS.

     5A.  FINANCIAL STATEMENTS.  The Company covenants that it will deliver to
each Significant Holder in duplicate:

          (i) as soon as practicable and in any event within 60 days after the
     end of each quarterly period (other than the last quarterly period) in each
     fiscal year, statements of income, cash flows and shareholders' equity of
     the Company for the period from the beginning of the current year to the
     end of such quarterly period, and a balance sheet of the Company as at the
     end of such quarterly period, setting forth in comparative form statements
     of income and cash flows for the corresponding period in the preceding
     year, all in reasonable detail and certified by an authorized financial
     officer of the Company, subject to changes resulting from year-end
     adjustments;

                                       4

 
          (ii)  as soon as practicable and in any event within 120 days after
     the end of each fiscal year, statements of income, cash flows and
     shareholders' equity of the Company for such year, and a balance sheet of
     the Company as at the end of such year, all prepared in accordance with
     GAAP, setting forth in each case in comparative form corresponding
     consolidated figures from the preceding annual audit, all in reasonable
     detail and satisfactory in form to the Required Holder(s)' and reported on
     by a Big Five Accounting Firm selected by the Company whose report shall be
     without limitation as to the scope of the audit and reasonably satisfactory
     in substance to the Required Holder(s) and shall be certified by such Big
     Five Accounting Firm to its knowledge with its unqualified opinion;

          (iii) promptly upon transmission thereof, copies of all such financial
     statements, proxy statements, notices and reports as it shall send to its
     stockholders;

          (iv)  promptly upon receipt thereof, a copy of each other report or
     management letter submitted to the Company by its independent public
     accountants in connection with any annual, interim or special audit made by
     them of the books of the Company;

           (v)  such other financial data and other information as the Company
     regularly provides to its other lenders, other holders of Debt or other
     creditors; and

          (vi)  with reasonable promptness, such other information and documents
     as such Significant Holder may reasonably request.

Together with each delivery of financial statements required by clauses (i) and
                                                                -----------    
(ii) above, the Company will deliver to each Significant Holder an Officer's
- ----                                                                        
Certificate demonstrating (with computations in reasonable detail) compliance by
the Company and its Subsidiaries with the provisions of paragraph 6A and stating
                                                        ------------            
that there exists no Event of Default or Default, or, if any Event of Default or
Default exists, specifying the nature and period of existence thereof and what
action the Company proposes to take with respect thereto.  Together with each
delivery of financial statements required by clause (ii) above, the Company will
                                             -----------                        
deliver to each Significant Holder a certificate of such accountants stating
that, in making the audit necessary for their report on such financial
statements, they have obtained no knowledge of any Event of Default or Default,
or, if they have obtained knowledge of any Event of Default or Default,
specifying the nature and period of existence thereof.  Such accountants,
however, shall not be liable to anyone by reason of their failure to obtain
knowledge of any Event of Default or Default which would not be disclosed in the
course of an audit conducted in accordance with generally accepted auditing
standards.

     The Company also covenants that promptly after any Responsible Officer
obtains knowledge of an Event of Default or Default, it will deliver to each
Significant Holder an Officer's Certificate specifying the nature and period of
existence thereof and what action the Company has taken, is taking or proposes
to take with respect thereto.

                                       5

 
     5B.  INSPECTION OF BOOKS AND RECORDS.  The Company covenants that it will
permit any Person designated by any Significant Holder in writing, at such
Significant Holder's expense, to visit the Company's place of business to
examine the corporate books and financial records of the Company and make copies
thereof or extracts therefrom and to discuss the affairs, finances and accounts
of the Company with the principal officers thereof and its independent public
accountants, all at such reasonable times and as often as such Significant
Holder may reasonably request; provided, however that disclosure of any
                               --------                                
confidential or material non-public information of the Company requested by such
Person may be reasonably conditioned on such Person's execution and delivery of
a confidentiality agreement in form and substance acceptable to Company.

     5C.  COVENANT TO SECURE NOTE EQUALLY.  The Company covenants that if it
shall create or assume any Lien upon any of its property or assets, whether now
owned or hereafter acquired, other than Liens permitted by the provisions of
paragraph 6C(1) (unless prior written consent to the creation or assumption
- ---------------                                                            
thereof shall have been obtained pursuant to paragraph 11C), it will make or
                                             -------------                  
cause to be made effective provision whereby the Notes will be secured by such
Lien equally and ratably with any and all other Debt thereby secured so long as
any such other Debt shall be so secured; provided that the creation and
                                         --------                      
maintenance of such equal and ratable Lien shall not in any way limit or modify
the right of the holders of the Notes to enforce the provisions of paragraph
                                                                   ---------
6C(1).
- ----- 

     5D.  COMPLIANCE WITH LAWS.  The Company covenants that it and all of its
properties and facilities will comply at all times in all material respects with
all federal, state, local and regional statutes, laws, ordinances and judicial
or administrative orders, judgments, rulings and regulations, including those
relating to protection of the environment except, in any such case, where
failure to comply would not result in a Material Adverse Effect on the business,
condition (financial or otherwise) or operations of the Company.

     5E.  PAYMENT OF TAXES.  The Company covenants that it will file or cause to
be filed all federal, state and other income tax returns which, to the knowledge
of the officers of the Company, are required to be filed, and will pay all taxes
as shown on such returns and on all assessments received by it to the extent
that such taxes become due, except such taxes as are subject to a Good Faith
Contest.

     5F.  ENFORCEMENT OF MORTGAGE PROVISIONS.  The Company covenants that it
shall require any Commercial Mortgage Loans originated or acquired by it to
contain covenants to the effect that (1) the mortgagor shall obtain and maintain
at all times appropriate insurance coverage with respect to the mortgaged
property and (2) the mortgagor shall promptly pay and discharge any indebtedness
or lawful claims against the mortgaged property which if unpaid would constitute
a Lien on such property.  The Company further covenants and agrees that it will
use commercially reasonable efforts to enforce such covenants.

     6.   NEGATIVE COVENANTS.  So long as any Note or amount owing under this
Agreement shall remain unpaid, the Company covenants that:

                                       6

 
     6A(1). DEBT SERVICE COVERAGE RATIO.  The Company will not, at any time,
permit the Debt Service Coverage Ratio to be less than 1.4 to 1.

     6A(2). DEBT TO TOTAL ASSETS RATIO.  The Company will not permit the ratio
of (i) Debt to (ii) the sum of Total Assets plus the cumulative depreciation of
any real property assets of the Company to exceed .70 to 1.

     6B.  RESTRICTED PAYMENTS.  The Company covenants that it will not make, pay
or declare, or commit to make, pay or declare, any Restricted Payment unless,
after giving effect thereto, (i) the aggregate amount of all Restricted Payments
made during the twelve month period commencing on the date hereof and expiring
on the one (1) year anniversary of the date hereof, and including all previously
made Restricted Payments, does not exceed 100% of the lesser of (A) Net Income
and (B) Net Income (determined without giving effect to any current income taxes
or any change in deferred taxes), in each case, for all such fiscal quarters
during such time period on a cumulative basis, and (ii) the aggregate amount of
all Restricted Payments made during any fiscal quarter after the expiration of
such twelve (12) month period, and including all previously made Restricted
Payments, does not exceed 105% of the lesser of (C) Net Income and (D) Net
Income (determined without giving effect to any current income taxes or any
change in deferred taxes), in each case, for all such fiscal quarters on a
cumulative basis, and (iii) no Default or Event of Default exists or would exist
after giving effect to such Restricted Payment.

     6C.  LIENS, DEBT, AND OTHER RESTRICTIONS.  The Company will not:

     6C(1). LIENS.  Create, assume or suffer to exist any Lien upon any of its
properties or assets, whether now owned or hereafter acquired, or any income,
participation, royalty or profits therefrom (whether or not provision is made
for the equal and ratable securing of the Notes in accordance with the
provisions of paragraph 5C), except for the Liens specified in clauses (i)
              ------------   ------                            -----------
through (xi) below (collectively, "PERMITTED LIENS");
        ----                                         

          (i)   Liens for taxes, assessments or other governmental levies or
     charges not yet due or which are subject to a Good Faith Contest;

          (ii)  statutory Liens of landlords and Liens of carriers, contractors,
     warehousemen, mechanics and materialmen incurred in the ordinary course of
     business for sums not yet due or which are subject to a Good Faith Contest;

          (iii) Liens (other than any Lien imposed by the Employee Retirement
     Income Security Act of 1974, as amended ("ERISA")) incurred, or deposits
     made, in the ordinary course of business (A) in connection with workers'
     compensation, unemployment insurance, old age benefit and other types of
     social security, (B) to secure (or to obtain letters of credit that secure)
     the performance of tenders, statutory obligations, surety and appeal bonds,
     bids, leases, performance bonds, purchase, construction, government or
     sales contracts and other similar obligations or (C) otherwise to satisfy
     statutory or legal obligations; provided, that in each such case 
                                     --------

                                       7

 
     such Liens (1) were not incurred or made in connection with the incurrence
     or maintenance of Indebtedness, the borrowing of money, the obtaining of
     advances or credit, and (2) do not in the aggregate materially detract from
     the value of the property or assets so encumbered or materially impair the
     use thereof in the operation of its business;

          (iv)   Liens existing (A) prior to the time of acquisition upon any
     property acquired by the Company through purchase, merger or consolidation
     or otherwise, whether or not expressly assumed by the Company, or (B)
     placed on property at the time of acquisition by the Company or to secure
     all or a portion of (or to secure Debt incurred to pay all or a portion of)
     the purchase price thereof; provided that such Lien shall not have been
                                 --------                                   
     created, incurred or assumed in contemplation of such purchase, merger,
     consolidation or other event;

          (v)    Liens now or hereafter required by this Agreement;

          (vi)   Liens in existence on the date hereof as set forth on Schedule
                                                                       --------
     6C(1) hereto;
     -----        

          (vii)  leases, subleases, licenses and sublicenses granted to third
     parties not interfering in any material respect with the business of the
     Company;

          (viii) minor survey exceptions or minor encumbrances, easements or
     reservations, or rights of others for rights-of-way, utilities and other
     similar purposes, or zoning or other restrictions as to use of real
     property, that are necessary for the conduct of the operations of the
     Company or that customarily exist on properties of corporations engaged in
     similar businesses and are similarly situated and that do not in any event
     materially impair their use in the operations of the Company;

          (ix)   any attachment or judgment Lien, unless the judgment it secures
     shall not, within 60 days after the entry thereof, have been discharged or
     execution thereof stayed pending appeal, or shall not have been discharged
     within 60 days after the expiration of any such stay; provided the
                                                           --------    
     aggregate amount of such attachment or judgment Liens shall not secure
     obligations in excess of $10,000,000 at any time;

          (x)    Liens other than those described in clauses (i) through (ix)
                                                     -----------         ----
     above that secure Debt permitted by clauses (i) and (ii) of paragraph
                                         -----------     ----    ---------
     6C(2); provided that no Default or Event of Default shall exist and be
            --------                                                       
     continuing or shall result therefrom; or

          (xi)   any Lien renewing, extending or refunding any Lien permitted by
     clause (x) above.
     ----------       

     6C(2). DEBT.  Create, incur, assume or in any other way become liable in
respect of any Debt, except
                     ------

                                       8

 
          (i)   the Notes;

          (ii)  Funded Debt of the Company described in Schedule 6C(2) and
                                                        --------------    
     outstanding as of the date hereof; and

          (iii) additional Funded Debt of the Company in an amount, which when
     added to all other Funded Debt of the Company then outstanding (but
     excluding the Funded Debt evidenced by the Notes and the Other EC Notes),
     does not exceed $1,000,000,000 at any one time outstanding.

     6C(3). LOANS, ADVANCES, INVESTMENTS AND CONTINGENT LIABILITIES.  Make or
permit to remain outstanding any loan or advance to, or extend credit other than
credit extended in the normal course of business to any Person who is not an
Affiliate of the Company to, or Guarantee, directly or indirectly, in connection
with the obligations, stock or dividends of, or own, purchase or acquire any
stock, obligations or securities of, or any other interest in, or make any
capital contribution to, any Person, or commit to do any of the foregoing, (all
of the foregoing collectively being "INVESTMENTS"), except for the Investments
                                                    ------                    
set forth in clauses (i) through (ix) below (collectively, "PERMITTED
             -----------         ----                                
INVESTMENTS"):

          (i)   obligations backed by the full faith and credit of the United
     States Government (whether issued by the United States Government or an
     agency thereof), and obligations guaranteed by the United States
     Government, in each case which mature within one year from the date
     acquired;

          (ii)  demand and time deposits with, Eurodollar deposits with or
     certificates of deposit issued by any commercial bank or trust company (1)
     organized under the laws of the United States or any of its states or
     having branch offices therein, (2) having equity capital in excess of
     $100,000,000 and (3) which issues either (x) senior debt securities rated A
     or better by S&P, A or better by Moody's or (y) commercial paper rated A-2
     or better by S&P or Prime-2 or better by Moody's (or, in either case, an
     equivalent rating from another nationally recognized credit rating agency)
     ("RATED BANKS"), in each case payable in the United States in United States
     dollars and in each case which mature within one year from the date
     acquired;

          (iii) marketable commercial paper and loan participations rated A-1 or
     better by S&P or P-1 or better by Moody's (or, in either case, an
     equivalent rating from another nationally recognized credit rating agency)
     and maturing not more than 270 days from the date acquired;

          (iv)  bonds, debentures, notes or similar debt instruments issued by a
     state or municipality given a "AA" rating or better by S&P or an equivalent
     rating by another nationally recognized credit rating agency and maturing
     not more than one year from the date acquired;

                                       9

 
          (v)    the loans, investments and advances existing as of the date
     hereof and listed on Schedule 6C(3) hereto;
                          --------------        

          (vi)   repurchase agreements and similar commercial undertakings for
     terms of less than one year with any Rated Bank, provided that such
                                                      --------          
     repurchase agreements or undertakings are secured and collateralized by
     obligations backed by the full faith and credit of the United States
     Government in aggregate face amount equal to or greater than the
     obligations so secured;

          (vii)  money market mutual funds that (A) are denominated in U.S.
     Dollars, (B) have average asset maturities not in excess of 365 days, (C)
     have total invested assets in excess of $1,000,000,000 and (D) invest
     exclusively in Permitted Investments other than those described in Clause
                                                                        ------
     (ix) below, or are rated at least BBB- by S&P;
     ----                                          

          (viii) bonds, debentures, notes or similar debt instruments issued by
     a corporation organized and existing under the laws of any state of the
     United States of America or the District of Columbia and having a long term
     credit rating of BBB-or better from S&P or Baa3 or better from Moody's; and

          (ix)   Commercial Mortgage Loans and ABS originated, purchased or
     acquired by the Company in the ordinary course of its business, provided
     that any such Commercial Mortgage Loan or ABS shall comply with the
     investment guidelines set forth on Exhibit C hereto at the time of
                                        ---------                      
     origination, purchase, or acquisition by the Company; and further provided,
     that at all times the Company's portfolio of Investments, taken as a whole,
     shall be in compliance with such investment guidelines.

     6C(4).  MERGER AND CONSOLIDATION.  Merge or consolidate with any other
Person, except that the Company may consolidate or merge with any other
corporation if (A) the Company shall be the continuing or surviving corporation
and (B) no Default or Event of Default exists or would exist after giving effect
to such merger or consolidation.

     6C(5).  TRANSFER OF ASSETS.  Transfer, or agree or otherwise commit to
Transfer, a substantial portion of its assets.

     6C(6)   ISSUANCE OF ADDITIONAL UNSECURED NOTES.  Issue any unsecured notes
of the Company which are rated lower than the rating of the Notes on the date
hereof.

     7.   EVENTS OF DEFAULT.

     7A.  ACCELERATION.  If any of the following events shall occur and be
continuing for any reason whatsoever (and whether such occurrence shall be
voluntary or involuntary or come about or be effected by operation of law or
otherwise):

                                       10

 
          (i)    the Company defaults in the payment of any principal of or
     Yield-Maintenance Amount payable with respect to any Note when the same
     shall become due, either by the terms thereof or otherwise as herein
     provided; or

          (ii)   the Company defaults in the payment of any interest on any Note
     for more than 10 days after the date due; or

          (iii)  the Company defaults (whether as primary obligor or as
     guarantor or other surety) in any payment of principal of or interest on
     any other Debt (other than secured Debt which is non-recourse to the
     Company) beyond any period of grace provided with respect thereto, or the
     Company fails to perform or observe any other agreement, term or condition
     contained in any agreement under which any such Debt is created (or if any
     other event thereunder or under any such agreement shall occur and be
     continuing) and the effect of such failure or other event is to cause, or
     to permit the holder or holders of such (or a trustee on behalf of such
     holder or holders) to cause, such Debt to become due (or to be repurchased
     by the Company) prior to any stated maturity, provided that the aggregate
     amount of all Debt as to which such a payment default shall occur and be
     continuing or such a failure or other event causing or permitting
     acceleration (or resale to the Company) shall occur and be continuing
     exceeds an amount equal to the lesser of (x) $10,000,000 and (y) 5% of the
     net assets of the Company as reflected on its most recent balance sheet at
     the time of determination; or

          (iv)   any representation or warranty made by or on behalf of the
     Company or any of its officers herein or in any other writing furnished in
     connection with or pursuant to this Agreement or the transactions
     contemplated hereby shall be false in any material respect on the date as
     of which made; or

          (v)    the Company fails to perform or observe any agreement contained
     in paragraph 6; or
        -----------    

          (vi)   the Company fails to perform or observe any other agreement,
     term or condition contained herein and such failure shall not be remedied
     within 30 days after the Company receives written notice of such default
     from any holder of a Note; or

          (vii)  the Company makes an assignment for the benefit of creditors or
     is generally not paying its debts as such debts become due; or

          (viii) any decree or order for relief in respect of the Company is
     entered under any bankruptcy, reorganization, compromise, arrangement,
     insolvency, readjustment of debt, dissolution or liquidation or similar
     law, whether now or hereafter in effect (herein called the "BANKRUPTCY
     LAW"), of any jurisdiction; or

                                       11

 
          (ix)   the Company petitions or applies to any tribunal for, or
     consents to, the appointment of, or taking possession by, a trustee,
     receiver, custodian, liquidator or similar official of the Company, or of
     any substantial part of the assets of the Company, or commences a voluntary
     case under the Bankruptcy Law of the United States or any proceedings
     relating to the Company under the Bankruptcy Law of any other jurisdiction;
     or

          (x)    any such petition or application is filed, or any such
     proceedings are commenced, against the Company and the Company by any act
     indicates its approval thereof, consent thereto or acquiescence therein, or
     an order, judgment or decree is entered appointing any such trustee,
     receiver, custodian, liquidator or similar official, or approving the
     petition in any such proceedings, and such order, judgment or decree
     remains unstayed and in effect for more than 60 days; or

          (xi)   any order, judgment or decree is entered in any proceedings
     decreeing the dissolution of the Company and such order, judgment or decree
     remains unstayed and in effect for more than 60 days; or

          (xii)  one or more final judgments in an aggregate amount in excess of
     $10,000,000 is rendered against the Company and, within 60 days after entry
     thereof, a solvent insurance carrier or carriers have not confirmed in
     writing that each such judgment is fully insured or any such judgment is
     not discharged or execution thereof stayed pending appeal, or within 60
     days after the expiration of any such stay, any such judgment is not
     discharged;

     then (a) if such event is an Event of Default specified in clauses (i) or
                                                                -----------   
     (ii) of this paragraph 7A, the holder of any Note (other than the Company
     ----         ------------                                                
     or any of its Affiliates) may at its option during the continuance of such
     Event of Default, by notice in writing to the Company, declare such Note to
     be, and such Note shall thereupon be and become, immediately due and
     payable at par, together with interest accrued thereon, without
     presentment, demand, protest or other notice of any kind, all of which are
     hereby waived by the Company, (b) if such event is an Event of Default
     specified in clause (viii), (ix) or (x) of this paragraph 7A, all of the
                  -------------  ----    ---         ------------            
     Notes at the time outstanding shall automatically become immediately due
     and payable, together with interest accrued thereon and the Yield-
     Maintenance Amount, if any and to the extent permitted by law, with respect
     to each Note, without presentment, demand, protest or notice of any kind,
     all of which are hereby waived by the Company, and (c) with respect to any
     other event constituting an Event of Default, the Required Holder(s) may,
     at its or their option, by notice in writing to the Company, declare all of
     the Notes to be, and all of the Notes shall thereupon be and become,
     immediately due and payable together with interest accrued thereon and
     together with the Yield-Maintenance Amount, if any, with respect to each
     Note, without presentment, demand, protest or other notice of any kind, all
     of which are hereby waived by the Company (provided that, so long as any BP
                                                -------- ----                   
     Party holds any Note(s), such BP Party may declare its Note(s) to be
     immediately due and payable 

                                       12

 
     with respect to any such other event constituting an Event of Default
     without the consent or approval of the other Holders).

          The Company acknowledges, and the parties hereto agree, that each
     holder of a Note has the right to maintain its investment in the Notes free
     from repayment by the Company (except as herein specifically provided for)
     and that the provision for payment of the Yield-Maintenance Amount by the
     Company in the event that the Notes are prepaid or are accelerated as a
     result of an Event of Default, is intended to provide compensation for the
     deprivation of such right under such circumstances.

     7B.  RESCISSION OF ACCELERATION.  At any time after any or all of the Notes
shall have been declared immediately due and payable pursuant to paragraph 7A,
                                                                 ------------ 
the Required Holder(s) may, by notice in writing to the Company, rescind and
annul such declaration and its consequences if (i) the Company shall have paid
all overdue interest on the Notes, the principal of and Yield-Maintenance
Amount, if any, payable with respect to any Notes which have become due
otherwise than by reason of such declaration, and interest on such overdue
interest and overdue principal and Yield-Maintenance Amount at the applicable
rate specified in the Notes, (ii) the Company shall not have paid any amounts
which have become due solely by reason of such declaration, (iii) all Events of
Default and Defaults, other than non-payment of amounts which have become due
solely by reason of such declaration, shall have been cured or waived pursuant
to paragraph 11C, and (iv) no judgment or decree shall have been entered for the
   -------------                                                                
payment of any amounts due pursuant to the Notes or this Agreement.
Notwithstanding the foregoing, so long as any BP Holder holds any Note(s), only
such BP Holder shall be permitted to rescind and annul any such declaration with
respect to the Note(s) that it holds.  No such rescission or annulment shall
extend to or affect any subsequent Event of Default or Default or impair any
right arising therefrom.

     7C.  NOTICE OF ACCELERATION OR RESCISSION.  Whenever any Note shall be
declared immediately due and payable pursuant to paragraph 7A or any such
                                                 ------------            
declaration shall be rescinded and annulled pursuant to paragraph 7B, the
                                                        ------------     
Company shall forthwith give written notice thereof to the holder of each Note
at the time outstanding.

     7D.  OTHER REMEDIES.  If any Event of Default shall occur and be
continuing, the holder of any Note may proceed to protect and enforce its rights
under this Agreement and such Note by exercising such remedies as are available
to such holder in respect thereof under applicable law, either by suit in equity
or by action at law, or both, whether for specific performance of any covenant
or other agreement contained in this Agreement or in aid of the exercise of any
power granted in this Agreement.  No remedy conferred in this Agreement upon the
holder of any Note is intended to be exclusive of any other remedy, and each and
every such remedy shall be cumulative and shall be in addition to every other
remedy conferred herein or now or hereafter existing at law or in equity or by
statute or otherwise.

     8.   REPRESENTATIONS, COVENANTS AND WARRANTIES.  The Company represents,
covenants and warrants as follows:

                                       13

 
     8A.  ORGANIZATION.  The Company is a corporation duly organized and
existing in good standing under the laws of the State of Delaware, and is duly
qualified as a foreign corporation and is in good standing in each jurisdiction
in which such qualification is required by law, other than those jurisdictions
as to which the failure to be so qualified or in good standing would not,
individually or in the aggregate, reasonably be expected to have a Material
Adverse Effect.  The Company has the corporate power and authority to own or
hold under lease the properties it purports to own or hold under lease, to
transact the business it transacts and proposes to transact, to execute and
deliver this Agreement and the Notes and to perform the provisions hereof and
thereof.  The Company has no Subsidiaries.

     8B.  FINANCIAL STATEMENTS.  The Company has furnished you with the
unaudited financial statements, certified by a principal financial officer of
the Company:  a balance sheet of the Company as of June 30, 1998 and statements
of income, stockholders' equity and cash flows for the six-month period ended on
such date, prepared by the Company.  To the Company's knowledge, such financial
statements are true and correct in all material respects (subject, as to interim
statements, to changes resulting from audits and year-end adjustments), have
been prepared in accordance with GAAP consistently followed through  out the
periods involved and show all liabilities, direct and contingent, of the Company
required to be shown in accordance with such principles.  To the Company's
knowledge, the balance sheets fairly present the condition of the Company as at
the dates thereof, and the statements of income, stockholders' equity and cash
flows fairly present the results of the operations of the Company and its cash
flows for the periods indicated.  To the knowledge of the Company, there has
been no material adverse change in the business, condition (finan  cial or
otherwise) or operations of the Company since June 30, 1998.

     8C.  ACTIONS PENDING.  There is no action, suit, investigation or
proceeding pending or, to the knowledge of the Company, threatened against the
Company, or any properties or rights of the Company, by or before any court,
arbitrator or administrative or governmental body which (i) might result in a
Material Adverse Effect or (ii) purports to affect the validity or
enforceability of this Agreement, any Note issued hereunder or the transactions
contemplated hereby.

     8D.  TAXES.  The Company has filed all federal, state and other income tax
returns which, to the knowledge of the officers of the Company, are required to
be filed, and has paid all taxes as shown on such returns and on all assessments
received by it to the extent that such taxes have become due, except such taxes
as are subject to a Good Faith Contest.

     8E.  CONFLICTING AGREEMENTS AND OTHER MATTERS.  The Company is not a party
to any contract or agreement or subject to any charter or other corporate
restriction which materially and adversely affects its business, property or
assets, or financial condition. Neither the execution nor delivery of this
Agreement or the Notes, nor the offering, issuance and sale of the Notes, nor
fulfillment of nor compliance with the terms and provisions hereof and of the
Notes will materially conflict with, or result in a material breach of the
terms, conditions or provisions of, or constitute a default under, or result in
any material violation of, or result in the creation of any Lien upon any of the
properties or assets of the Company

                                       14

 
pursuant to, the charter or by-laws of the Company, any award of any arbitrator
or any agree ment (including any agreement with stockholders), instrument,
order, judgment, decree, statute, law, rule or regulation to which the Company
is subject. Except as set forth in Schedule 8E attached hereto, the Company is
                                   -----------      
not a party to, or otherwise subject to any provision contained in, any
instrument evidencing Indebtedness of the Company, any agreement relating
thereto or any other contract or agreement (including its charter) which limits
the amount of, or otherwise imposes restrictions on the incurring of, Debt of
the Company of the type to be evidenced by the Notes.

     8F.  OFFERING OF NOTES.  Neither the Company nor any agent acting on its
behalf has, directly or indirectly, offered the Notes or any similar security of
the Company for sale to, or solicited any offers to buy the Notes or any similar
security of the Company from, or otherwise approached or negotiated with respect
thereto with, any Person other than Institutional Investors, and neither the
Company nor any agent acting on its behalf has taken or will take any action
which would subject the issuance or sale of the Notes to the provisions of
section 5 of the Securities Act or to the provisions of any securities or Blue
Sky law of any applicable  jurisdiction.

     8G.  USE OF PROCEEDS.  The Company does not own or have any present
intention of acquiring any "margin stock" as defined in Regulation U (12 CFR
Part 207) of the Board of Governors of the Federal Reserve System (herein called
"MARGIN STOCK").  The proceeds of sale of the Notes will be used to purchase
Commercial Mortgage Loans and/or marketable debt securities, including, but not
limited to, ABS.  None of such proceeds will be used, directly or indirectly,
for the purpose, whether immediate, incidental or ultimate, of purchasing or
carrying any margin stock or for the purpose of maintaining, reducing or retir
ing any Indebtedness which was originally incurred to purchase or carry any
stock that is currently a margin stock or for any other purpose which might
constitute this transaction a "purpose credit" within the meaning of such
Regulation U.  Neither the Company nor any agent acting on its behalf has taken
or will take any action which might cause this Agreement or the Notes to violate
Regulation U, Regulation T or any other regulation of the Board of Governors of
the Federal Reserve System or to violate the Exchange Act, in each case as in
effect now or as the same may hereafter be in effect.

     8H.  ERISA.  The Company has no retirement or employee benefit plans
subject to ERISA.

     8I.  GOVERNMENTAL CONSENT.  No circumstance in connection with the
offering, issuance, sale or delivery of the Notes is such as to require any
authorization, consent, approval, exemption or other action by or notice to or
filing with any court or administrative or governmental body in connection with
the execution and delivery of this Agreement, the offering, issuance, sale or
delivery of the Notes or fulfillment of or compliance with the terms and
provisions hereof or of the Notes, if the failure to obtain any such consent
would have a Material Adverse Effect.

                                       15

 
     8J.  COMPLIANCE WITH LAWS.  The Company and all of its properties and
facilities have complied at all times in all material respects with all federal,
state, local and regional statutes, laws, ordinances and judicial or
administrative orders, judgments, rulings and regulations, except, in any such
case, where failure to comply would not result in a Material Adverse Effect on
the business, condition (financial or otherwise) or operations of the Company.

     8K.  INVESTMENT COMPANY STATUS.  Neither the Company nor any Subsidiary is
an "investment company" or a company "controlled" by an "investment company"
within the meaning of the Investment Company Act of 1940, as amended, or an
"investment adviser" within the meaning of the Investment Advisers Act of 1940,
as amended.

     8L.  DUE AUTHORIZATION, ETC.  This Agreement and the Notes have been duly
authorized by all necessary corporate action on the part of the Company, and
this Agreement constitutes, and upon execution and delivery thereof each Note
will constitute, a legal, valid and binding obligation of the Company
enforceable against the Company in accordance with its terms, except as such
enforceability may be limited by (i) applicable bankruptcy, insolvency,
reorganization, moratorium or other similar laws affecting the enforcement of
creditors' rights generally and (ii) general principles of equity (regardless of
whether such enforceability is considered in a proceeding in equity or at law).

     8M. DISCLOSURE.  Neither this Agreement nor any other document, certificate
or statement furnished to you by or on behalf of the Company in connection
herewith contains any untrue statement of a material fact or omits to state a
material fact necessary in order to make the statements contained herein and
therein not misleading.  There is no fact peculiar to the Company which
materially adversely affects or in the future may (so far as the Company can now
foresee) materially adversely affect the business, property or assets, or
financial condition of the Company and which has not been set forth in this
Agreement or in the other documents, certificates and written statements
furnished to you and Boston Properties Limited Partnership, a Delaware limited
partnership by or on behalf of the Company prior to the date hereof in
connection with the transactions contemplated hereby.

     8N.  INVESTMENTS.  All mortgage loans owned by the Company as of the date
of this Agreement are Commercial Mortgage Loans which are not in default beyond
any applicable cure periods pursuant to the terms thereof, and the Company has
not extended any of the cure periods provided in the loan documents governing,
evidencing and securing such Commercial Mortgage Loans and originally executed
in connection therewith beyond the applicable cure periods provided in such loan
documents.

     8O.  ENVIRONMENTAL MATTERS.  Except as disclosed on Schedule 8O hereto, the
                                                         -----------            
Company (i) has complied in all material respects with all applicable
Environmental Laws, and the Company has not received (A) notice of any material
failure so to comply, (B) any letter or request for information under Section
104 of CERCLA or comparable state laws or (C) any information that would lead it
to believe that it is the subject of any federal, state or local investigation
concerning Environmental Laws; (ii) does not manage, generate,

                                       16

 
transport, discharge or store any Hazardous Material in material violation of
any material Environmental Laws; (iii) does not own, operate or maintain any
underground storage tanks; and (iv) is not aware of any conditions or
circumstances associated with its currently or previously owned or leased
properties or operations (or those of any tenants of such properties) which may
give rise to any liabilities under Environmental Laws which could have a
Material Adverse Effect.

     9.   REPRESENTATIONS OF THE PURCHASER.  You represent that you are not
acquiring the Notes to be purchased by you hereunder with a view to or for sale
in connection with any distribution thereof within the meaning of the Securities
Act, provided that the disposition of your property shall at all times be and
remain within your control. You understand that the Notes have not been
registered under the Securities Act and may be resold only if registered
pursuant to the provisions of the Securities Act or if an exemption from
registration is available, except under circumstances where neither such
registration nor such an exemption is required by law, and that the Company is
not required to register the Notes.

     10.  DEFINITIONS; ACCOUNTING MATTERS.  For the purpose of this Agreement,
the terms defined in paragraphs 10A and 10B (or within the text of any other
                     --------------     ---                                 
paragraph) shall have the respective meanings specified therein and all
accounting matters shall be subject to determination as provided in paragraph
                                                                    ---------
10C.
- --- 

     10A. YIELD-MAINTENANCE TERMS.

               "BUSINESS DAY" shall mean any day other than a Saturday, a Sunday
     or a day on which commercial banks in New York City are required or
     authorized to be closed.

               "CALLED PRINCIPAL" shall mean, with respect to any Note, the
     princi pal of such Note that is to be prepaid pursuant to paragraph 4 or is
                                                               -----------      
     declared to be immediately due and payable pursuant to paragraph 7A, as the
                                                            ------------        
     context requires.

               "DISCOUNTED VALUE" shall mean, with respect to the Called
     Principal of any Note, the amount obtained by discounting all Remaining
     Scheduled Payments with respect to such Called Principal from their
     respective scheduled due dates to the Settlement Date with respect to such
     Called Principal, in accordance with accepted financial practice and at a
     discount factor (as converted to reflect the periodic basis on which
     interest on the Notes is payable, if interest is payable other than on a
     semi-annual basis) equal to the Reinvestment Yield with respect to such
     Called Principal.

               "REINVESTMENT YIELD" shall mean, with respect to the Called
     Princi pal of any Note, the offered-side yield to maturity, as of 10:00
     a.m. (New York City time) on the Business Day next preceding the Settlement
     Date with respect to such

                                       17

 
     Called Principal, of the U.S. Treasury security that was used to determine
     the then Treasury of such Investment Note.

               "REMAINING AVERAGE LIFE" shall mean, with respect to the Called
     Principal of any Note, the number of years (calculated to the nearest one-
     twelfth year) obtained by dividing (i) such Called Principal into (ii) the
     sum of the products obtained by multiplying (a) each Remaining Scheduled
     Payment of such Called Principal (but not of interest thereon) by (b) the
     number of years (calculated to the nearest one-twelfth year) which will
     elapse between the Settlement Date with respect to such Called Principal
     and the scheduled due date of such Remaining Scheduled Payment.

               "REMAINING SCHEDULED PAYMENTS" shall mean, with respect to the
     Called Principal of any Note, all payments of such Called Principal and
     interest thereon that would be due on or after the Settlement Date through
     and including the Rate Reset Date (assuming that the entire principal
     balance and all accrued interest as of such Rate Reset Date will be repaid
     on such Rate Reset Date), if the Settlement Date precedes such Rate Reset
     Date, or alternatively, the Maturity Date if the Settlement Date occurs
     after the Rate Reset Date.

               "SETTLEMENT DATE" shall mean, with respect to the Called
     Principal of any Note, the date on which such Called Principal is to be
     prepaid pursuant to paragraph 4 or is declared to be immediately due and
                         -----------                                         
     payable pursuant to paragraph 7A, as the context requires.
                         ------------                          

               "YIELD-MAINTENANCE AMOUNT" shall mean, with respect to any Note,
     an amount equal to the excess, if any, of the Discounted Value of the
     Called Principal of such Note over the sum of (i) such Called Principal
     plus (ii) to the extent paid on the Settlement Date with the Called
     Principal, interest accrued thereon as of (including interest due on) the
     Settlement Date with respect to such Called Principal. The Yield-
     Maintenance Amount shall in no event be less than zero.

     10B.    OTHER TERMS.

               "ABS" shall mean mortgage, or other asset backed securities.

               "AFFILIATE" shall mean any Person directly or indirectly
     controlling, controlled by, or under direct or indirect common control
     with, the Company.  A Person shall be deemed to control a corporation if
     such Person possesses, directly or indirectly, the power to direct or cause
     the direction of the management and policies of such corporation, whether
     through the ownership of voting securities, by contract or otherwise.

               "BANKRUPTCY LAW" shall have the meaning specified in clause
                                                                    ------
     (viii) of paragraph 7A.
     -----     ------------

                                       18

 
               "BIG FIVE ACCOUNTING FIRM" shall mean any of Arthur Andersen,
     Deloitte & Touche, KPMG Peat Marwick, PricewaterhouseCoopers and Ernst &
     Young.

               "BP PARTY" shall mean Boston Properties Limited Partnership, a
     Delaware limited partnership, and any Affiliate thereof, and shall also
     include, in all events, One Embarcadero Center Venture, a California
     general partnership.

               "CASH FLOW"  shall mean, in respect of any period, the sum of (a)
     Net Income for such period and (b) the amount of all depreciation and
     amortization allowances and other non-cash expenses of the Company but only
     to the extent deducted in the determination of Net Income for such period.

               "CERCLA" shall mean the Comprehensive Environmental Response,
     Compensation and Liability Act of 1980, as amended.

               "CODE" shall mean the Internal Revenue Code of 1986, as amended.

               "COMMERCIAL MORTGAGE LOANS" shall mean commercial mortgage loans
     made in substantial conformance with (x) standards prevailing in the
     commercial loan mortgage marketplace and (y) the guidelines contained in
     Exhibit C hereto.
     ---------        

               "CURRENT DEBT" shall mean, with respect to the Company, all
     Indebtedness for borrowed money which by its terms or by the terms of any
     instrument or agreement relating thereto matures on demand or within one
     year from the date of the creation thereof and is not directly or
     indirectly renewable or extendible at the option of the debtor to a date
     more than one year from the date of the creation thereof, provided that
     Indebtedness for borrowed money outstanding under a revolving credit or
     similar agreement which obligates the lender or lenders to extend credit
     over a period of more than one year shall constitute Funded Debt and not
     Current Debt, even though such Indebtedness by its terms matures on demand
     or within one year from the date of the creation thereof.

               "DEBT" shall mean Current Debt and Funded Debt.

               "DEBT SERVICE" shall mean, with respect to any period, the sum of
     the following: (a) Interest Charges for such period, and (b) all payments
     of principal in respect of Debt of the Company paid or payable during such
     period.

               "DEBT SERVICE COVERAGE RATIO" shall mean, at any time of
     determination, the ratio of (a) Cash Flow for the most recent fiscal
     quarter to (b) Debt Service for such fiscal quarter.

                                       19

 
               "DEFAULT" shall mean any of the events specified in paragraph 7A,
                                                                   ------------ 
     whether or not any requirement for such event to become an Event of Default
     has been satisfied.

               "DUFF & PHELPS" shall mean Duff & Phelps Corporation.

               "ENVIRONMENTAL LAWS" shall mean all laws relating to pollution,
     the release or other discharge, handling, disposition or treatment of
     Hazardous Materials and other substances or the protection of the
     environment or of employee health and safety, including, without
     limitation, CERCLA, the Hazardous Material Transportation Act (49 U.S.C.
     Section 1801 et. seq.), the Resource Conservation and Recovery Act (42
     U.S.C. Section 7401 et. seq.), the Clean Air Act (42 U.S.C. Section 401 et.
     seq.), the Toxic Substances Control Act (15 U.S.C. Section 651 et. seq.)
     and the Emergency Planning and Community Right-To-Know Act (42 U.S.C.
     Section 11001 et. seq.), each as the same may be amended and supplemented.

               "EVENT OF DEFAULT" shall mean any of the events specified in 
     paragraph 7A, provided that there has been satisfied any requirement in
     ------------                                                           
     connection with such event for the giving of notice, or the lapse of time,
     or the happening of any further condition, event or act.

               "EQUITY REDEMPTION LOAN" shall mean that certain loan in the
     aggregate principal amount of $328,143,000 by Bankboston. N.A., The Chase
     Manhattan Bank, Fleet National Bank, PNC Bank, National Association,
     Dresdner Bank AG New York Branch and Grand Cayman Branch, The Bank of New
     York, Key Bank National Association and Citizens Bank (and other banks
     which may become parties to the Term Loan Agreement described immediately
     below) to you, One Embarcadero Center Venture, Embarcadero Center
     Associates and Four Embarcadero Center Venture pursuant to that certain
     Term Loan Agreement dated as of November 12, 1998.

               "EXCHANGE ACT" shall mean the Securities Exchange Act of 1934, as
     amended.

               "FITCH" shall mean Fitch IVCA, Inc.

               "FUNDED DEBT" shall mean, with respect to any Person, all
     Indebtedness of such Person which by its terms or by the terms of any
     instrument or agreement relating thereto matures, or which is otherwise
     payable or unpaid, more than one year from, or is directly or indirectly
     renewable or extendible at the option of the debtor to a date more than one
     year (including an option of the debtor under a revolving credit or similar
     agreement obligating the lender or lenders to extend credit over a period
     of more than one year) from, the date of the creation thereof, including
     current maturities of long-term debt that appear as current liabilities in
     accordance with GAAP.

                                       20

 
               "GAAP" shall have the meaning set forth in paragraph 10C.
                                                          ------------- 

               "GOOD FAITH CONTEST" shall mean, with respect to any tax,
     assessment, Lien, obligation, claim, liability, judgment, injunction,
     award, decree, order, law, regulation, statute or similar item, any
     challenge or contest thereof by appropriate proceedings timely initiated in
     good faith by the Company for which adequate reserves therefor have been
     taken in accordance with GAAP.

               "GUARANTEE" shall mean, with respect to any Person, any direct or
     indirect liability, contingent or otherwise, of such Person with respect to
     any indebtedness, lease, dividend or other obligation of another,
     including, without limitation, any such obligation directly or indirectly
     guaranteed, endorsed (otherwise than for collection or deposit in the
     ordinary course of business) or discounted or sold with recourse by such
     Person, or in respect of which such Person is otherwise directly or
     indirectly liable, including, without limitation, any such obligation in
     effect guaranteed by such Person through any agreement (contingent or
     otherwise) to

            (i) purchase,repurchase or otherwise acquire such obligation or any
          security therefor, or to provide funds for the payment or discharge of
          such obligation (whether in the form of loans, advances, stock
          purchases, capital contributions or otherwise);

          (ii)  maintain the solvency or any balance sheet or other financial
          condition of the obligor of such obligation; or

          (iii) pay the purchase price for goods or services regardless of the
          non-delivery or non-furnishing thereof, in any such case if the
          purpose, intent or effect of such agreement is to provide assurance
          that such obligation will be paid or discharged, or that any
          agreements relating thereto will be complied with, or that the holders
          of such obligation will be protected against loss in respect thereof.

     The amount of any Guarantee shall be equal to the outstanding principal
     amount of the obligation guaranteed or such lesser amount to which the
     maximum exposure of the guarantor shall have been specifically limited.

               "HAZARDOUS MATERIALS"  shall mean (i) any material or substance
     defined as or included in the definition of "hazardous substances",
     "hazardous wastes", "hazardous material", "toxic substances" or any other
     formulations intended to define, list or classify substances by reason of
     their deleterious properties, (ii) any oil, petroleum or petroleum derived
     substance, (iii) any flammable substances or explosives, (iv) any
     radioactive materials, (v) asbestos in any form, (vi) electrical equipment
     that contains any oil or dielectric fluid containing levels or
     polychlorinated biphenyls in excess of 50 parts per million, (vii)
     pesticides or (viii)

                                       21

 
     any other chemical, material or substance, exposure to which is prohibited,
     limited or regulated by any governmental agency or authority or which may
     or could pose a hazard to the health and safety of persons in the vicinity
     thereof.

               "INCLUDING" shall mean, unless the context clearly requires
     otherwise, "including without limitation".

               "INDEBTEDNESS" shall mean, with respect to any Person and without
     duplication (i) all items (excluding items of contingency reserves or of
     reserves for deferred income taxes) which in accordance with GAAP would be
     included in determining total liabilities as shown on the liability side of
     a balance sheet of such Person as of the date on which Indebtedness is to
     be determined, other than Preferred Stock of such Person except as set
     forth in clause (iv) below; (ii) all indebtedness secured by any Lien on,
              -----------                                                     
     or payable out of the proceeds or production from, any property or asset
     owned or held by such Person, whether or not the indebtedness secured
     thereby shall have been assumed, (iii) all indebtedness of third parties,
     including joint ventures and partnerships of which such Person is a
     venturer or general partner, recourse to which may be had against such
     Person, (iv) redemption obligations in respect of mandatorily redeemable
     Preferred Stock; and (v) all indebtedness and other obligations of others
     with respect to which such Person has become liable by way of a Guarantee.

               "INITIAL TREASURY" shall mean, for any Note, the yield to
     maturity implied by (i) the bid-side yields reported, as of 10:00am (New
     York City time) (or, at your election, at such other time as we may
     mutually agree) on the Business Day next preceding the date upon which such
     Note is funded, on the display designated as "Page 678" on the Telerate
     Access Service, for actively traded U.S. Treasury securities having a
     maturity equal to the Rate Reset Date of such Note, or if such bid-side
     yields shall not be reported as of such time or the yields reported as of
     such time shall not be ascertainable, (ii) the Treasury Constant Maturity
     Series bid-side yields reported, for the latest day for which such yields
     shall have been so reported as of the Business Day next preceding the date
     upon which such Note is funded in Federal Reserve Statistical Release H.15
     (519) (or any comparable successor publication) for actively traded U.S.
     Treasury securities having a constant maturity equal to the Rate Reset Date
     of such Note.  Such implied yields shall be determined, if necessary, by
     (a) converting U.S. Treasury bill quotations to bond-equivalent yields in
     accordance with accepted financial practice and (b) interpolating linearly
     between yields reported for various maturities.  Notwithstanding the
     foregoing, subject to the Company's written approval (which approval shall
     not be unreasonably withheld or delayed), you shall be entitled to select a
     different actively traded U.S. Treasury security (which shall have a
     maturity date approximately equal and reasonably comparable to the first
     Rate Reset Date of such Note) the bid-side yield to maturity of which shall
     be the Initial Treasury for purposes of such Note; provided, however, that
                                                        --------  -------      
     if you select a different U.S. Treasury security which is approved by the
     Company pursuant to the foregoing or if a time other than 10:00 a.m. is
     used to determine the Initial Treasury,

                                       22

 
     then the Margin for such Note shall be adjusted so that the interest rate
     on such Investment Note is no different than if you had not exercised your
     rights pursuant to this sentence to select a different U.S. Treasury or to
     agree to a different time for determining the Initial Treasury. Schedule 1
                                                                     ----------
     sets forth the definitive Initial Treasury for each Note.

               "INSTITUTIONAL INVESTOR" shall mean any insurance company,
     commercial, investment or merchant bank, finance company, mutual fund,
     registered money or asset manager, savings and loan association, credit
     union, registered investment advisor, pension fund, investment company,
     licensed broker-dealer, "qualified institutional buyer" (as such term is
     defined under Rule 144A promulgated under the Securities Act, or any
     successor law, rule or regulation) or "accredited investor" (as such term
     is defined under Regulation D promulgated under the Securities Act, or any
     successor law, rule or regulation).

               "INTANGIBLES" shall mean, without duplication, all Intellectual
     Property and operating agreements, treasury stock, deferred or capitalized
     research and development costs, goodwill (including any amounts, however
     designated, representing the cost of acquisition of business and
     investments in excess of the book value thereof), unamortized debt discount
     and expense, any write-up of asset value after June 30, 1997 and any other
     amounts reflected in contra-equity accounts, and any other assets treated
     as intangible assets under GAAP.

               "INTELLECTUAL PROPERTY" shall mean all patents, trademarks,
     service marks, trade names, copyrights, brand names, mechanical or
     technical processes and paradigms, know-how, and similar intellectual
     property and applications, licenses and similar rights in respect of the
     same.

               "INTEREST CHARGES" shall mean, with respect to any period, the
     sum (without duplication) of the following: (a) all interest in respect of
     Debt of the Company deducted in determining Net Income for such period, and
     (b) all debt discount and expense amortized or required to be amortized in
     the determination of Net Income for such period.

               "INVESTMENTS" shall have the meaning provided in paragraph 6C(3).
                                                                --------------- 

               "LIEN" shall mean any mortgage, pledge, security interest,
     encumbrance, minimum or compensating deposit arrangement, lien (statutory
     or otherwise) or charge of any kind (including any agreement to give any of
     the foregoing, any conditional sale or other title retention agreement, any
     lease in the nature thereof, and the filing of or agreement to give any
     financing statement under the Uniform Commercial Code of any jurisdiction)
     or any other type of preferential arrangement for the purpose, or having
     the effect, of protecting a creditor against loss or securing the payment
     or performance of an obligation.

                                       23

 
               "MARGIN" shall mean, for any Note, 165 basis points; provided
                                                                    --------
     that, if you select, for purposes of determining the Initial Treasury, a
     ----                                                                    
     different U.S. Treasury security from the U.S Treasury selected by the
     Company or if a time other than 10:00 a.m. is used to determine the Initial
     Treasury, in either case pursuant to your rights as described in the
     definition of Initial Treasury, then the Margin during the period of time
     commencing on the funding of the Investment Note until the first Rate Reset
     Date thereunder shall be adjusted as described in the last sentence of the
     definition of Initial Treasury and, from and after the first Rate Reset
     Date, the Margin shall again adjust to equal 165 basis points.  Schedule 1
                                                                     ----------
     sets forth the definitive initial Margin for each Note through the first
     Rate Reset Date of each Note.

               "MATERIAL ADVERSE EFFECT" shall mean (i) a material adverse
     effect on the business, assets, liabilities, operations, prospects or
     condition, financial or otherwise, of the Company, (ii) material impairment
     of the Company to perform any of its obligations under the Agreement and
     the Notes or (iii) material impairment of the validity or enforceability or
     the rights of, or the benefits available to, the holders of the Notes under
     this Agreement or the Notes.

               "MATURITY DATE" shall have the meaning set forth in paragraph 1
                                                                   -----------
     hereof.

               "MOODY'S" shall mean Moody's Investors Services, Inc., including
     the NCO/Moody's Commercial Division, or any successor Person.

               "NET INCOME" shall mean, as to any period, consolidated gross
     revenues of the Company less all operating and non-operating expenses of
     the Company for such period, including all charges of a proper character
     (including current and deferred taxes on income, provision for taxes on
     unremitted foreign earnings which are included in gross revenues, and
     current additions to reserves), but not including in gross revenues the
     following:

               (i)   any gains (net of expenses and taxes applicable thereto) in
               excess of losses resulting from the Transfer of capital assets
               (i.e., assets other than current assets);

               (ii)  any gains resulting from the write-up of assets;

               (iii) any equity of the Company in the undistributed earnings
               (but not losses) of any corporation which is not a Subsidiary;

               (iv)  any earnings or losses of any Person acquired by the
               Company through purchase, merger, consolidation or otherwise for
               any fiscal period prior to the fiscal period in which the
               acquisition occurs;

                                       24

 
               (v)    gains or losses from the acquisition of securities or the
               retirement or extinguishment of Debt;

               (vi)   gains on collections from insurance policies or
               settlements;

               (vii)  any income or gain during such period from any change in
               accounting principles, from any discontinued operations or the
               disposition thereof, from any extraordinary items or from any
               prior period adjustment;

               (viii) in the case of a successor to the Company by consolidation
               or merger or as a transferee of its assets, any earnings of the
               successor corporation prior to such consolidation, merger or
               transfer of assets.

     If the preceding calculation results in a number less than zero, such
     amount shall be considered a net loss.

               "OFFICER'S CERTIFICATE" shall mean a certificate signed in the
     name of the Company by its President, one of its Vice Presidents or its
     Treasurer.

               "OTHER EC NOTES" shall mean those certain senior promissory notes
     of the Company issued by the Company on the date hereof to (a) One
     Embarcadero Center Venture in the aggregate principal amount of $88,200,000
     (b) Embarcadero Center Associates in the aggregate principal amount of
     $111,927,000 and (c) Four Embarcadero Center Venture in the aggregate
     principal amount of $143,119,000.

               "PERMITTED INVESTMENTS" shall have the meaning set forth in
     paragraph 6C(3).
     --------------- 

               "PERMITTED LIENS" shall have the meaning set forth in paragraph
                                                                     ---------
     6C(1).
     ----- 

               "PERSON" shall mean and include an individual, a partnership, a
     joint venture, a corporation, a limited liability company, a trust, an
     unincorporated organ  ization and a government or any department or agency
     thereof.

               "PHASE ONE" shall mean the closing and consummation of the
     transactions described in that certain Master Transaction Agreement dated
     as of September 28, 1998, by and among Prudential, PIC Realty Corporation,
     Fedmark Corporation, Embarcadero Center Investors Partnership, Pacific
     Property Services, L.P., the Persons listed on Exhibit A-1 attached
     thereto, Boston Properties Limited Partnership and Boston Properties, Inc.,
     which are to be consummated on the "Closing Date" (as defined in such
     Master Transaction Agreement).

                                       25

 
               "PRUDENTIAL" shall mean The Prudential Insurance Company of
     America, a New Jersey mutual insurance company.

               "PRUDENTIAL GUARANTIED LOAN"  shall mean that certain loan in the
     aggregate principal amount of $92,000,000 by The Chase Manhattan Bank
     and/or any of its subsidiaries or affiliates (the "BANK") to you, One
     Embarcadero Center Venture, Embarcadero Center Associates and Four
     Embarcadero Center Venture pursuant to that certain Term Loan Agreement
     dated as of November 12, 1998.

               "RATE RESET DATE", with respect to any Note, shall have the
     meaning set forth in such Note.

               "RATED BANK" shall have the meaning set forth in paragraph
                                                                ---------
     6C(3)(ii).
     --------- 

               "RELEASE" shall mean any release, spill, emission, leaking,
     pumping, injection, deposit, disposal, discharge, leaching or migration
     into the indoor or outdoor environment, including, without limitation, the
     movement of Hazardous Materials through ambient air, soil, surface water,
     ground water, wetlands, land or subsurface strata, in violation of
     applicable law or prudent business practice.

               "REQUIRED HOLDER(S)" shall mean the holder or holders of at least
     51% of the aggregate principal amount of the Notes from time to time
     outstanding, but shall include, in any event, the BP Parties so long as any
     BP Party holds a direct or indirect interest in any Note.

               "RESET TREASURY" shall mean the yield to maturity implied by (i)
     the yields reported, as of 10:00am (New York City time) on the Business Day
     next preceding the Rate Reset Date for any Note, on the display designated
     as "Page 678" on the Telerate Access Service, for actively traded U.S.
     Treasury securities having a maturity equal to the earlier to occur of the
     next Rate Reset Date provided for in such Note (if any) and the Maturity
     Date of such Note, or if such yields shall not be reported as of such time
     or the yields reported as of such time shall not be ascertainable, (ii) the
     Treasury Constant Maturity Series yields reported, for the latest day for
     which such yields shall have been so reported as of the Business Day next
     preceding the Rate Reset Date in Federal Reserve Statistical Release H.15
     (519) (or any comparable successor publication) for actively traded U.S.
     Treasury securities having a constant maturity equal to the earlier to
     occur of the next Rate Reset Date provided for in such Note (if any) or the
     Maturity Date of such Note.  Such implied yields shall be determined, if
     necessary, by (a) converting U.S. Treasury bill quotations to bond-
     equivalent yields in accordance with accepted financial practice and (b)
     interpolating linearly between yields reported for various maturities.

               "RESPONSIBLE OFFICER" shall mean the chief executive officer,
     chief operating officer, chief financial officer or chief accounting
     officer of the Company 

                                       26

 
     or any other officer of the Company involved principally in its financial
     administration or its controllership function.

               "RESTRICTED INVESTMENT" shall mean any Investment other than a
     Permitted Investment.

               "RESTRICTED PAYMENTS" shall mean any of the following (provided
     that, notwithstanding anything to the contrary stated below, the term
     "Restricted Payments" does not include any distribution of capital gains by
     the Company to its shareholders):

               (i)   any dividend on any class of the Company's capital stock at
               any time after the date hereof;

               (ii)  any other distribution on account of any class of the
               Company's capital stock;

               (iii) any redemption, purchase or other acquisition, direct or
               indirect, of any shares of the Company's capital stock;

               (iv)  any unscheduled payment of principal of, or retirement,
               redemption, purchase or other acquisition of, any subordinated
               debt, including subordinated debt that is convertible into equity
               of the Company;

               (v)   any Restricted Investment;

               "S&P" shall mean Standard and Poor's Corporation, or any
     successor Person.

               "SECURITIES ACT" shall mean the Securities Act of 1933, as
     amended.

               "SHAREHOLDER" shall mean and include any Person who owns,
     beneficially or of record, directly or indirectly, at any time during any
     year with respect to which a computation is being made 5% or more of the
     outstanding voting stock of the Company.

               "SIGNIFICANT HOLDER" shall mean (i) any BP Party, so long as any
     BP Party shall hold (or be committed under this Agreement to purchase) any
     Note, or (ii) any other holder of at least 5% of the aggregate principal
     amount of the Notes from time to time outstanding.

               "SUBSIDIARY" shall mean any corporation or other entity at least
     51% of the total combined voting power of all classes of Voting Stock or
     similar securities 

                                       27

 
     of which shall, at the time as of which any determination is being made, be
     owned by the Company either directly or through Subsidiaries.

               "TOTAL ASSETS" shall mean, as at any time of determination, the
     total assets of a Person recorded on a balance sheet of such Person
     prepared in accordance with GAAP.

               "TRANSFER" shall mean, with respect to any item, the sale,
     exchange, conveyance, lease, transfer or other disposition of such item.

               "TRANSFEREE" shall mean any direct or indirect transferee of all
     or any part of any Note purchased by you under this Agreement.

               "TREASURY" shall mean, for any Note, the Initial Treasury or the
     then Reset Treasury, as the case may be, upon which the Margin under such
     Note is added to obtain the interest rate of such Note.

               "VOTING STOCK" shall mean, with respect to any corporation, any
     shares of stock of such corporation whose holders are entitled under
     ordinary circumstances to vote for the election of directors of such
     corporation (irrespective of whether at the time stock of any other class
     or classes shall have or might have voting power by reason of the happening
     of any contingency), and, with respect to any other entity, any similar
     security of such entity.

     10C. ACCOUNTING AND LEGAL PRINCIPLES, TERMS AND  DETERMINATIONS.  All
references in this Agreement to "GAAP" shall mean generally accepted accounting
principles, as in effect in the United States from time to time.  Unless
otherwise specified herein, all accounting terms used herein shall be
interpreted, all determinations with respect to accounting matters hereunder
shall be made, and all unaudited financial statements and certificates and
reports as to financial matters required to be furnished hereunder shall be
prepared, in accordance with GAAP (except as set forth in the next succeeding
sentence of this paragraph 10C), applied on a basis consistent with the most
                 -------------                                              
recent audited financial statements of the Company delivered pursuant to
paragraph 5A(i) or (ii) or, if no such statements have been so delivered, the
- ---------------    ----                                                      
most recent audited financial statements referred to in clause (i) of paragraph
                                                        ----------    ---------
8B.  Notwithstanding the foregoing, however, quarterly financial statements
- --                                                                         
shall not include notes to financial statements and to that extent such
statements will not have been prepared in accordance with GAAP.  Any reference
herein to any specific citation, section or form of law, statute, rule or
regulation shall refer to such new, replacement or analogous citation, section
or form should citation, section or form be modified, amended or replaced.

     11.  MISCELLANEOUS.

     11A   NOTE PAYMENTS.  The Company agrees that, so long as you shall hold
any Note, it will make payments of principal of, interest on and any Yield-
Maintenance Amount 

                                       28

 
payable with respect to such Note, which comply with the terms of this
Agreement, by wire transfer of immediately available funds for credit (not later
than 12:00 noon, New York City time, on the date due) to your account or
accounts as specified in the Purchaser Schedule attached hereto, or such other
account or accounts in the United States as you may designate in writing,
notwithstanding any contrary provision herein or in any Note with respect to the
place of payment. You agree that, before disposing of any Note, you will make a
notation thereon (or on a schedule attached thereto) of all principal payments
previously made thereon and of the date to which interest thereon has been paid.
Upon written request of the Company made concurrently with or reasonably
promptly after payment or prepayment in full of any Note, you shall surrender
such Note for cancellation, reasonably promptly after any such request, to the
Company at its principal executive office. The Company agrees to afford the
benefits of this paragraph 11A to any Transferee which shall have
                 -------------                                   
made the same agreement as you have made in this paragraph 11A.
                                                 ------------- 

     11B. EXPENSES. The Company agrees, whether or not the transactions
contemplated hereby shall be consummated, to pay, and save you and any
Transferee harmless against liability for the payment of, all reasonable out-of-
pocket costs and expenses arising in connection with such transactions,
including:

          (i)    (A) all stamp and documentary taxes and similar charges and (B)
          costs of obtaining a private placement number for the Notes in each
          case as a result of the execution and delivery of this Agreement or
          the issuance of the Notes;

          (ii)   document production and duplication charges and the reasonable
          fees and expenses of any special counsel engaged by you or such
          Transferee in connection with this Agreement and the transactions
          contemplated hereby;

          (iii)  the costs and expenses, including reasonable attorneys' fees,
          incurred by you or such Transferee in enforcing any rights under this
          Agreement or the Notes; and

          (iv)   any judgment, liability, claim, order, decree, cost, fee,
          expense, action or obligation resulting directly from the consummation
          of the transactions contemplated hereby, including the use of the
          proceeds of the Notes by the Company;

provided that the Company shall not be responsible for (1) any of your expenses
- --------                                                                       
or those of a Transferee incurred solely in connection with any transfer of any
Note or (2) the fees and expenses of more than one counsel for the holders of
the Notes, except to the extent the Required Holders determine that (a) either
legal advice is needed in a jurisdiction other than that specified in paragraph
                                                                      ---------
11L or (b) there exists a conflict of interest amongst the holders of the Notes.
- --- 
The obligations of the Company under this paragraph 11B shall survive the
                                          -------------                  
transfer of any Note or portion thereof or interest therein by you or any
Transferee and the payment of any Note.

                                       29

 
     11C. CONSENT TO AMENDMENTS.  This Agreement may be amended, and the Company
may take any action herein prohibited, or omit to perform any act herein
required to be performed by it, if the Company shall obtain the written consent
to such amendment, action or omission to act, of the Required Holder(s); except
                                                                         ------
that, (i) without the written consent of the holder or holders of all Notes at
- ----                                                                          
the time outstanding, no amendment to this Agreement shall change the maturity
of any Note, or change the principal of, or the rate, method of computation or
time of payment of interest on or any Yield-Maintenance Amount payable with
respect to any Note, or affect the time, amount or allocation of any
prepayments, or change the proportion of the principal amount of the Notes
required with respect to any consent, amendment, waiver or declaration, and (ii)
so long as any BP Holder holds any Note(s), no amendment, action or omission to
act shall amend, modify or otherwise affect such BP Party's rights under the
Note(s) that it holds (or its rights under this Agreement to the extent relating
to such BP Party's Note(s)) without such BP Party's written consent.  Each
holder of any Note at the time or thereafter outstanding shall be bound by any
consent authorized by this paragraph 11C, whether or not such Note shall have
                           -------------                                     
been marked to indicate such consent, but any Notes issued thereafter may bear a
notation referring to any such consent.  No course of dealing between the
Company and the holder of any Note nor any delay in exercising any rights
hereunder or under any Note shall operate as a waiver of any rights of any
holder of such Note.  As used herein and in the Notes, the term "this Agree
ment" and references thereto shall mean this Agreement as it may from time to
time be amended or supplemented.

     11D. FORM, REGISTRATION, TRANSFER AND EXCHANGE OF NOTES; LOST NOTES.  The
Notes are issuable as registered notes without coupons in denominations of at
least $1,000,000, except as may be necessary to (i) reflect any principal amount
not evenly divisible by $1,000,000 or (ii) enable the registration of transfer
by a holder of its entire holding of Notes.  The Company shall keep at its
principal office a register in which the Company shall provide for the
registration of Notes and of transfers of Notes.  Upon surrender for
registration of transfer of any Note at the principal office of the Company, the
Company shall, at its expense, execute and deliver one or more new Notes of like
tenor and of a like aggregate principal amount, registered in the name of such
transferee or transferees. At the option of the holder of any Note, such Note
may be exchanged for other Notes of like tenor and of any authorized
denominations, of a like aggregate principal amount, upon surrender of the Note
to be exchanged at the principal office of the Company.  Whenever any Notes are
so surrendered for exchange, the Company shall, at its expense, execute and
deliver the Notes which the holder making the exchange is entitled to receive.
Every Note surrendered for registration of transfer or exchange shall be duly
endorsed, or be accompanied by a written instrument of transfer duly executed,
by the holder of such Note or such holder's attorney duly authorized in writing.
Any Note or Notes issued in exchange for any Note or upon transfer thereof shall
carry the rights to unpaid interest and interest to accrue which were carried by
the Note so exchanged or transferred, so that neither gain nor loss of interest
shall result from any such transfer or exchange.  Upon receipt of written notice
from the holder of any Note of the loss, theft, destruction or mutilation of
such Note and, in the case of any such loss, theft or destruction, upon receipt
of such holder's indemnity agreement (which shall be unsecured if such holder is
an Institutional Investor whose senior

                                       30

 
debt securities are rated BBB- or Baa3 or better by S&P or Moody's,
respectively, and, otherwise, which shall be unsecured unless the Company
requests in writing that such indemnity agreement be secured), or in the case of
any such mutilation upon surrender and cancellation of such Note, the Company
will make and deliver a new Note, of like tenor, in lieu of the lost, stolen,
destroyed or mutilated Note. The Company shall give to any holder of a Note that
is an Institutional Investor promptly upon request therefor, a complete and
correct copy of the names and addresses of all registered holders of Notes.

     The Company may require payment of a sum sufficient to cover any stamp tax
or governmental charge imposed in respect of any such transfer of Notes.

     11E. TRANSFER OF NOTES; PERSONS DEEMED OWNERS.  Subject to the next
succeeding sentence, you may transfer any Note or portion thereof in your sole
discretion; provided, however, that any Transferee shall be an Institutional
Investor.  Prior to due presentment for registration of transfer, the Company
may treat the Person in whose name any Note is registered as the owner and
holder of such Note for the purpose of receiving payment of principal of,
interest on and any Yield-Maintenance Amount payable with respect to such Note
and for all other purposes whatsoever, whether or not such Note shall be
overdue, and the Company shall not be affected by notice to the contrary.

     11F. SURVIVAL OF REPRESENTATIONS AND WARRANTIES; ENTIRE AGREEMENT.  All
representations and warranties contained herein or made in writing by or on
behalf of the Company in connection herewith shall survive the execution and
delivery of this Agreement and the Notes, the transfer by you of any Note or
portion thereof or interest therein and the payment of any Note, and may be
relied upon by any Transferee, regardless of any investi  gation made at any
time by or on behalf of you or any Transferee.  Subject to the preceding
sentence, this Agreement and the Notes embody the entire agreement and
understanding between you and the Company and supersede all prior agreements and
understandings between you and the Company relating to the subject matter
hereof, and the Company shall not be affected by notice to the contrary.  No
provision of this Agreement shall be interpreted for or against any party
because that party or its legal representative drafted the provision.

     11G. SUCCESSORS AND ASSIGNS.  All covenants and other agreements in this
Agreement contained by or on behalf of either of the parties hereto shall bind
and inure to the benefit of the respective successors and assigns of the parties
hereto (including, without limitation, any Transferee) whether so expressed or
not.

     11H. NOTICES.  All written communications provided for hereunder shall be
sent by first class mail or nationwide overnight delivery service (with charges
prepaid) and (i) if to you, addressed to you at the address specified for such
communications in the Purchaser Schedule attached hereto, or at such other
address as you shall have specified to the Company in writing, (ii) if to any
other holder of any Note, addressed to such other holder at such address as such
other holder shall have specified to the Company in writing or, if any such
other holder shall not have so specified an address to the Company, then
addressed to such other holder in care of the last holder of such Note which
shall have so specified an 

                                       31

 
address to the Company, and (iii) if to the Company, addressed to it at
Prudential Realty Group, 8 Campus Drive, Parsippany, New Jersey 07054,
Attention: John Triece, or at such other address as the Company shall have
specified to the holder of each Note in writing; provided, however, that any
such communication to the Company may also, at the option of the holder of any
Note, be delivered by any other means either to the Company at its address
specified above or to any officer of the Company.

     11I. PAYMENTS DUE ON NON-BUSINESS DAYS.  Anything in this Agreement or the
Notes to the contrary notwithstanding, any payment of principal of or interest
on any Note that is due on a date other than a Business Day shall be made on the
next succeeding Business Day.  If the date for any payment is extended to the
next succeeding Business Day by reason of the preceding sentence, the period of
such extension shall be included in the computation of the interest payable on
such Business Day.

     11J. SATISFACTION REQUIREMENT.  If any agreement, certificate or other
writing, or any action taken or to be taken, is by the terms of this Agreement
required to be satisfactory to you or to the Required Holder(s), the
determination of such satisfaction shall be made by you or the Required
Holder(s), as the case may be, in the reasonable judgment of the Person or
Persons making such determination.

     11K. INDEMNIFICATION.  The Company hereby agrees to indemnify you and
your directors, officers, employees and agents from, and hold each of them
harmless against, any and all losses, liabilities, claims, damages and expenses
arising out of or by reason of any investigation or litigation or other
proceeding relating to this Agreement, the Notes or the transactions
contemplated hereby, including, without limitation, the reasonable fees and
disbursements of counsel incurred in connection with any such investigation or
litigation or other proceedings (but excluding any such losses, liabilities,
claims, damages or expenses incurred by reason of the gross negligence or
willful misconduct of the Person to be indemnified).

     11L. GOVERNING LAW.  This Agreement shall be construed and enforced in
accordance with, and the rights of the parties shall be governed by, the law of
the State of New York.

     11M. SEVERABILITY.  Any provision of this Agreement which is prohibited
or unenforceable in any jurisdiction shall, as to such jurisdiction, be
ineffective to the extent of such prohibition or unenforceability without
invalidating the remaining provisions hereof, and any such prohibition or
unenforceability in any jurisdiction shall not invalidate or render
unenforceable such provision in any other jurisdiction.

     11N. DESCRIPTIVE HEADINGS.  The descriptive headings of the several
paragraphs of this Agreement are inserted for convenience only and do not
constitute a part of this Agreement.

                                       32

 
     11O.   COUNTERPARTS.  This Agreement may be executed in any number of
counterparts, each of which shall be an original but all of which together shall
constitute one instrument.


                          [INTENTIONALLY LEFT BLANK]

                                       33

 
     If you are in agreement with the foregoing, please sign the form of
acceptance on the enclosed counterpart of this letter and return the same to the
Company, whereupon this letter shall become a binding agreement between the
Company and you.



                                    Very truly yours,


                                    PRUDENTIAL REALTY
                                    SECURITIES, INC.

                                    By: /s/ Paul D. Egan
                                       -------------------------
                                    Name:  Paul D. Egan
                                    Title: Vice President


                                    By:________________________
                                    Name:______________________
                                    Title:_____________________

                                      S-1

 
The foregoing Agreement is
hereby accepted as of the
date first above written:



THREE EMBARCADERO CENTER VENTURE,
a California general partnership

By: BOSTON PROPERTIES LLC,
    as Managing General Partner

    By: BOSTON PROPERTIES LIMITED
        PARTNERSHIP, as Manager

        By: BOSTON PROPERTIES, INC.,
            as General Partner


            By: /s/ Thomas J. O'Connor
               -------------------------
            Name: Thomas J. O'Connor
            Title: Vice President

                                      S-2

 
                                   EXHIBIT A
                                   ---------

                                [FORM OF NOTES]

                      PRUDENTIAL REALTY SECURITIES, INC.

                       SENIOR NOTE DUE __________, 200_

No. _____                                                     [Date]
$________


     FOR VALUE RECEIVED, the undersigned, PRUDENTIAL REALTY SECURITIES, INC.
(the "COMPANY"), a corporation organized and existing under the laws of the
State of Delaware, hereby promises to pay to THREE EMBARCADERO CENTER VENTURE, a
California general partnership, or registered assigns, the principal sum of
_____________  ______________ DOLLARS ($______________) on _____________, ____
(the "Maturity Date"), with interest (computed on the basis of a 360-day year
comprised of 12 30-day months) on the unpaid balance thereof at the rate of
____% per annum from the date hereof through and including _______, ___ (the
"RATE RESET DATE") and thereafter through and including the Maturity Date, at a
rate of interest per annum equal to the sum of (i) ________ basis points, and
(ii) the Reset Treasury, as defined in the Note Agreement.  All such interest
shall be payable semiannually on the 15/th/ day of June and December in each
year, commencing with the first such date next succeeding the date hereof, until
the principal hereof shall have become due and payable, and shall be payable on
any overdue payment (including any overdue prepayment) of principal, any overdue
payment of interest and any overdue payment of any Yield-Maintenance Amount (as
defined in the Note Agreement), payable semiannually as aforesaid (or, at the
option of the registered holder hereof, on demand), at a rate per annum from
time to time equal to the lesser of (a) the maximum rate permitted by applicable
law and (b) 2.0% over the interest rate then in effect under this Note in
accordance with the foregoing terms and provisions.

     Payments of principal of, interest on and any Yield-Maintenance Amount
payable with respect to this Note are to be made in immediately available funds,
in lawful money of the United States of America, by wire transfer to [_______]
at [NAME OF BANK] in [New York City], ABA #________, Account # __________, or to
such other account or place as the registered holder hereof shall designate to
the Company in writing.

     This Note is one of a series of Senior Notes (the "NOTES") issued pursuant
to a Note Agreement, dated as of November 12, 1998 (the "NOTE AGREEMENT"),
between the Company and One Embarcadero Center Venture and is entitled to the
benefits thereof.

     This Note is a registered Note and, as provided in the Note Agreement, upon
surrender of this Note for registration of transfer, duly endorsed, or
accompanied by a written instrument of transfer duly executed, by the registered
holder hereof or such holder's attorney duly authorized in writing, a new Note
for a like principal amount will be issued to, and registered in the name of,
the transferee. 

                                      A-1

 
Prior to due presentment for registration of transfer, the Company may treat the
person in whose name this Note is registered as the owner hereof for the purpose
of receiving payment and for all other purposes, and the Company shall not be
affected by any notice to the contrary.

     This Note is subject to optional prepayment, in whole or from time to time
in part, on the terms specified in the Note Agreement.

     If an Event of Default, as defined in the Note Agreement, shall occur and
be continuing, the principal of this Note may be declared or otherwise become
due and payable in the manner and with the effect provided in the Note
Agreement.

     The Company and any and all endorsers, guarantors and sureties severally
waive grace, demand, presentment for payment, notice of dishonor or default,
notice of intent to accelerate, notice of acceleration (to the extent set forth
in the Note Agreement), protest and diligence in collecting.

     THIS NOTE IS INTENDED TO BE PERFORMED IN THE STATE OF NEW YORK AND SHALL BE
CONSTRUED AND ENFORCED IN ACCORDANCE WITH THE LAW OF SUCH STATE.

                              PRUDENTIAL REALTY SECURITIES, INC.



                              By_________________________
                                    [Vice] President


                              By_________________________
                                    Treasurer

                                      B-1

 
                                   EXHIBIT C
                                   ---------

                             INVESTMENT GUIDELINES
                             ---------------------


1. Invest only in investment grade fixed income assets that:

a) are current in payment and not in default (subject to cure periods):

b) minimally provide for interest payments which are (i) monthly in the case of
"non securities" investments (i.e., whole mortgage loans) or (ii) semi-annually
in the case of "securities" investments (i.e. ABS):

c) have a maturity date which is at least thirty months beyond the asset
purchase date:

d) include prepayment premiums providing for yield maintenance or the
substantial equivalent: and

e) on an individual basis, do not exceed 7% of the total portfolio.

2. Make more than 80% of all investment in assets directly secured by first
mortgages.  In addition: (a) no such assets may have a "loan to value" ratio
which exceeds 80%, and at least 90% of such assets shall have a "loan to value"
ratio which is 75% or less and (b) the overall portfolio of such assets shall be
geographically diverse.

                                      C-1

 
                                                                   EXHIBIT 99.14




                      PRUDENTIAL REALTY SECURITIES, INC.
                                8 CAMPUS DRIVE
                         PARSIPPANY, NEW JERSEY 07054


                                    As of November 12, 1998



FOUR EMBARCADERO CENTER VENTURE
C/O BOSTON PROPERTIES, INC.
8 ARLINGTON STREET
BOSTON, MASSACHUSETTS 02116-3495
ATTN: GENERAL COUNCIL

Ladies and Gentlemen:

     The undersigned, PRUDENTIAL REALTY SECURITIES, INC. (herein called the
"COMPANY"), hereby agrees with you as follows:

     1.   AUTHORIZATION OF ISSUE OF NOTES.  The Company will authorize the issue
of up to eight (8) of its senior promissory notes in the aggregate principal
amount of $143,119,000, to be dated the date of issue thereof, to mature in the
case of each Note so issued, subject to the terms and provisions of the next
sentence below, not more than 15 years after the date of original issuance
thereof as set forth in each such Note (the "MATURITY DATE") and listed on
Schedule 1 attached hereto, to bear interest on the unpaid balance thereof from
- ----------                                                                     
the date thereof until the Rate Reset Date or, if such Note does not have a Rate
Reset Date, the Maturity Date for each such Note at the rate per annum equal to
the Initial Treasury plus the Margin, and from the Rate Reset Date (if any) of
any such Note until the principal thereof shall have become due and payable at
the rate per annum equal to the Reset Treasury plus the Margin, and to have such
other particular terms, as shall be specified herein and therein, and to be
substantially in the form of Exhibit A attached hereto. Notwithstanding the
                             ---------                                     
foregoing, each Note shall either mature or have a Rate Reset Date within ten
(10) years after the date of original issuance of such Note.  The term "Notes"
as used herein shall include each such senior promissory note delivered pursuant
to any provision of this Agreement and each such senior promissory note
delivered in substitution or exchange for any other Note pursuant to any such
provision.

     2.   PURCHASE AND SALE OF NOTES.  The Company hereby agrees to sell to you
and, subject to the terms and conditions herein set forth, you agree to purchase
from the Company, Notes in the aggregate principal amount of $143,119,000 at
100% of such 

                                       1

 
aggregate principal amount. The Company will deliver to you, at the offices of
O'Melveny & Myers LLP at 275 Battery Street, Suite 2600, San Francisco,
California, (or such other location to be determined by mutual agreement between
the Company and you) one or more Notes registered in your name, evidencing the
aggregate principal amount of Notes to be purchased by you and in the
denomination or denominations specified in the Purchaser Schedule attached
hereto, against payment of the purchase price thereof by transfer of immediately
available funds for credit to the Company's account #890-0305-525 at The Bank of
New York, New York, New York, ABA No. 021-000-018 on the date of closing, which
shall be November 12, 1998 or any other date on or before November 13, 1998 upon
which the Company and you may mutually agree (herein called the "CLOSING" or the
"DATE OF CLOSING").

     3.   CONDITIONS OF CLOSING.  Your obligation to purchase and pay for the
Notes to be purchased by you hereunder is subject to the satisfaction, on or
before the date of closing, of the following conditions:

     3A.  EXECUTION AND DELIVERY OF DOCUMENTS.  The Company shall have
delivered, or cause to be delivered, to you duly executed, original or certified
copies of the following documents, each to be dated the date of closing unless
otherwise indicated:

          (i)    the Note(s), originally executed and in substantially the form
     of Exhibit A attached hereto.
        ---------                 

          (ii)   a favorable opinion of Deborah Shulevitz, Esq., counsel to the
     Company (or such other counsel designated by the Company and acceptable to
     you) satisfactory to you and substantially in the form of Exhibit B
                                                               ---------
     attached hereto and as to such other matters as you may reasonably request.

          (iii)  the Certificate of Incorporation of the Company certified as of
     a date within 10 Business Days of closing by the Secretary of State of
     Delaware.

          (iv)   the Bylaws of the Company certified by the Secretary of the
     Company.

          (v)    an incumbency certificate signed by the Secretary or an
     Assistant Secretary of the Company certifying as to the names, titles and
     true signatures of the officers of the Company authorized to sign this
     Agreement and the Notes and the other documents to be delivered hereunder.

          (vi)   a certificate of the Secretary or an Assistant Secretary of the
     Company (A) attaching resolutions of the Board of Directors of the Company
     evidencing approval of the transactions contemplated by this Agreement and
     the issuance of the Notes and the execution, delivery and performance
     thereof, and authorizing certain officers to execute and deliver the same,
     and certifying that such resolutions were duly and validly adopted at a
     meeting duly noticed and held and such resolutions 

                                       2

 
     have not since been amended, revoked or rescinded, (B) certifying that no
     dissolution or liquidation proceedings as to the Company have been
     commenced or are contemplated, and (C) identifying and attaching any
     proposed or effected amendments to or changes in the Certificate of
     Incorporation of the Company since the date of the certified copies thereof
     provided pursuant to clause (iii) above or, if none, so certifying.
                          -----------                

          (vii)  (A) the representations and warranties contained in paragraph 8
                                                                     -----------
     shall be true on and as of the date of closing, except to the extent of
     changes caused by the transactions herein contemplated; (B) there shall
     exist on the date of closing no Event of Default or Default and no Event of
     Default or Default will occur by reason of or immediately following the
     sale of the Notes hereunder; (C) no condition, event or act that has had or
     would have a Material Adverse Effect has occurred since December 31, 1997,
     and (D) you shall have received an Officer's Certificate certifying as to
     all of the foregoing.

          (viii) a corporate good standing certificate as to the Company from
     the State of New Jersey.

          (xi)   additional documents or certificates with respect to such legal
     matters or corporate or other proceedings related to the transactions
     contemplated hereby as may be reasonably requested by you.

     3B.  PURCHASE PERMITTED BY APPLICABLE LAWS.  The purchase of and payment
for the Notes to be purchased by you on the date of closing on the terms and
conditions herein provided (including the use of the proceeds of such Notes by
the Company) shall not violate any applicable law or governmental regulation
(including, without limitation, Section 5 of the Securities Act or Regulation T,
U or X of the Board of Governors of the Federal Reserve System) and shall not
subject you to any tax, penalty, liability or other onerous condition under or
pursuant to any applicable law or governmental regulation, and you shall have
received such certificates or other evidence as you may request to establish
compliance with this condition.

     3C.  PROCEEDINGS.  All corporate and other proceedings taken or to be taken
in connection with the transactions contemplated hereby and all documents
incident thereto shall be satisfactory in substance and form to you, and you
shall have received all such counterpart originals or certified or other copies
of such documents as you may reasonably request.

     3D.  RATING.  The Company shall have obtained a rating of the Notes, as of
a date not more than 30 days prior to the closing hereof, of A or better from
S&P and the equivalent rating from Fitch and shall provide written evidence of
the same.

                                       3

 
     3E.  PHASE ONE TRANSACTIONS.  Phase One of the transactions shall have been
completed or shall be consummated concurrently with the consummation of the
transactions described herein.

     3F.  EQUITY REDEMPTION AND PRUDENTIAL GUARANTIED LOANS.  You shall have
obtained the Prudential Guarantied Loan and Equity Redemption Loan or the
closing of such loans shall occur concurrently with the closing of the
transactions contemplated herein; and the lenders of the Prudential Guarantied
Loan and Equity Redemption Loan shall have made available to you in full the
proceeds of the Prudential Guarantied Loan and Equity Redemption Loan.

     4.   PREPAYMENTS.  The Notes are not prepayable during the first year of
the term thereof.  The Notes shall be subject to prepayment, in whole or in part
at any time after the first anniversary date of this Agreement, at the option of
the Company, at 100% of the principal amount so prepaid plus accrued interest
thereon to the prepayment date and the Yield-Maintenance Amount, if any, under
the applicable Note with respect to the principal amount so prepaid; provided,
however, that any prepayment, whether in whole or in part, made on a Rate Reset
Date shall be payable without any Yield-Maintenance Amount.  If the Company
elects to prepay any of the Notes at any time while any BP Party holds any
Notes, the Company shall first offer to prepay all Notes then held by such BP
Party(ies) before offering to prepay any Notes held by any other Person.  Within
three (3) business days after delivery to it of any such offer of prepayment,
each such BP Party shall provide the Company written notice of its election to
either have such BP Party's Notes prepaid first or to have the Notes held by
other Persons prepaid prior to the Notes held by such BP Party; provided that,
                                                                -------- ---- 
notwithstanding the election of any such BP Party to have Notes held by other
Persons paid first, the Company may prepay any portion of such BP Party's Notes
once the Company has prepaid in full all Notes held by such other Persons.  The
failure of any BP Party to provide such notice to the Company within such three
(3) business day period shall be deemed an election to prepay such BP Party's
Notes first.

     5.   AFFIRMATIVE COVENANTS.

     5A.  FINANCIAL STATEMENTS.  The Company covenants that it will deliver to
each Significant Holder in duplicate:

          (i)  as soon as practicable and in any event within 60 days after the
     end of each quarterly period (other than the last quarterly period) in each
     fiscal year, statements of income, cash flows and shareholders' equity of
     the Company for the period from the beginning of the current year to the
     end of such quarterly period, and a balance sheet of the Company as at the
     end of such quarterly period, setting forth in comparative form statements
     of income and cash flows for the corresponding period in the preceding
     year, all in reasonable detail and certified by an authorized financial
     officer of the Company, subject to changes resulting from year-end
     adjustments;

                                       4

 
          (ii)   as soon as practicable and in any event within 120 days after
     the end of each fiscal year, statements of income, cash flows and
     shareholders' equity of the Company for such year, and a balance sheet of
     the Company as at the end of such year, all prepared in accordance with
     GAAP, setting forth in each case in comparative form corresponding
     consolidated figures from the preceding annual audit, all in reasonable
     detail and satisfactory in form to the Required Holder(s)' and reported on
     by a Big Five Accounting Firm selected by the Company whose report shall be
     without limitation as to the scope of the audit and reasonably satisfactory
     in substance to the Required Holder(s) and shall be certified by such Big
     Five Accounting Firm to its knowledge with its unqualified opinion;

          (iii)  promptly upon transmission thereof, copies of all such
     financial statements, proxy statements, notices and reports as it shall
     send to its stockholders;

          (iv)   promptly upon receipt thereof, a copy of each other report or
     management letter submitted to the Company by its independent public
     accountants in connection with any annual, interim or special audit made by
     them of the books of the Company;

           (v)   such other financial data and other information as the Company
     regularly provides to its other lenders, other holders of Debt or other
     creditors; and

          (vi)   with reasonable promptness, such other information and
     documents as such Significant Holder may reasonably request.

Together with each delivery of financial statements required by clauses (i) and
                                                                -----------    
(ii) above, the Company will deliver to each Significant Holder an Officer's
- ----                                                                        
Certificate demonstrating (with computations in reasonable detail) compliance by
the Company and its Subsidiaries with the provisions of paragraph 6A and stating
                                                        ------------            
that there exists no Event of Default or Default, or, if any Event of Default or
Default exists, specifying the nature and period of existence thereof and what
action the Company proposes to take with respect thereto.  Together with each
delivery of financial statements required by clause (ii) above, the Company will
                                             -----------                        
deliver to each Significant Holder a certificate of such accountants stating
that, in making the audit necessary for their report on such financial
statements, they have obtained no knowledge of any Event of Default or Default,
or, if they have obtained knowledge of any Event of Default or Default,
specifying the nature and period of existence thereof.  Such accountants,
however, shall not be liable to anyone by reason of their failure to obtain
knowledge of any Event of Default or Default which would not be disclosed in the
course of an audit conducted in accordance with generally accepted auditing
standards.

     The Company also covenants that promptly after any Responsible Officer
obtains knowledge of an Event of Default or Default, it will deliver to each
Significant Holder an Officer's Certificate specifying the nature and period of
existence thereof and what action the Company has taken, is taking or proposes
to take with respect thereto.

                                       5

 
     5B.  INSPECTION OF BOOKS AND RECORDS.  The Company covenants that it will
permit any Person designated by any Significant Holder in writing, at such
Significant Holder's expense, to visit the Company's place of business to
examine the corporate books and financial records of the Company and make copies
thereof or extracts therefrom and to discuss the affairs, finances and accounts
of the Company with the principal officers thereof and its independent public
accountants, all at such reasonable times and as often as such Significant
Holder may reasonably request; provided, however that disclosure of any
                               --------                                
confidential or material non-public information of the Company requested by such
Person may be reasonably conditioned on such Person's execution and delivery of
a confidentiality agreement in form and substance acceptable to Company.

     5C.  COVENANT TO SECURE NOTE EQUALLY.  The Company covenants that if it
shall create or assume any Lien upon any of its property or assets, whether now
owned or hereafter acquired, other than Liens permitted by the provisions of
paragraph 6C(1) (unless prior written consent to the creation or assumption
- ---------------                                                            
thereof shall have been obtained pursuant to paragraph 11C), it will make or
                                             -------------                  
cause to be made effective provision whereby the Notes will be secured by such
Lien equally and ratably with any and all other Debt thereby secured so long as
any such other Debt shall be so secured; provided that the creation and
                                         --------                      
maintenance of such equal and ratable Lien shall not in any way limit or modify
the right of the holders of the Notes to enforce the provisions of paragraph
                                                                   ---------
6C(1).
- ----- 

     5D.  COMPLIANCE WITH LAWS.  The Company covenants that it and all of its
properties and facilities will comply at all times in all material respects with
all federal, state, local and regional statutes, laws, ordinances and judicial
or administrative orders, judgments, rulings and regulations, including those
relating to protection of the environment except, in any such case, where
failure to comply would not result in a Material Adverse Effect on the business,
condition (financial or otherwise) or operations of the Company.

     5E.  PAYMENT OF TAXES.  The Company covenants that it will file or cause to
be filed all federal, state and other income tax returns which, to the knowledge
of the officers of the Company, are required to be filed, and will pay all taxes
as shown on such returns and on all assessments received by it to the extent
that such taxes become due, except such taxes as are subject to a Good Faith
Contest.

     5F.  ENFORCEMENT OF MORTGAGE PROVISIONS.  The Company covenants that it
shall require any Commercial Mortgage Loans originated or acquired by it to
contain covenants to the effect that (1) the mortgagor shall obtain and maintain
at all times appropriate insurance coverage with respect to the mortgaged
property and (2) the mortgagor shall promptly pay and discharge any indebtedness
or lawful claims against the mortgaged property which if unpaid would constitute
a Lien on such property.  The Company further covenants and agrees that it will
use commercially reasonable efforts to enforce such covenants.

     6.   NEGATIVE COVENANTS.  So long as any Note or amount owing under this
Agreement shall remain unpaid, the Company covenants that:

                                       6

 
     6A(1). DEBT SERVICE COVERAGE RATIO.  The Company will not, at any time,
permit the Debt Service Coverage Ratio to be less than 1.4 to 1.

     6A(2). DEBT TO TOTAL ASSETS RATIO.  The Company will not permit the ratio
of (i) Debt to (ii) the sum of Total Assets plus the cumulative depreciation of
any real property assets of the Company to exceed .70 to 1.

     6B.  RESTRICTED PAYMENTS.  The Company covenants that it will not make, pay
or declare, or commit to make, pay or declare, any Restricted Payment unless,
after giving effect thereto, (i) the aggregate amount of all Restricted Payments
made during the twelve month period commencing on the date hereof and expiring
on the one (1) year anniversary of the date hereof, and including all previously
made Restricted Payments, does not exceed 100% of the lesser of (A) Net Income
and (B) Net Income (determined without giving effect to any current income taxes
or any change in deferred taxes), in each case, for all such fiscal quarters
during such time period on a cumulative basis, and (ii) the aggregate amount of
all Restricted Payments made during any fiscal quarter after the expiration of
such twelve (12) month period, and including all previously made Restricted
Payments, does not exceed 105% of the lesser of (C) Net Income and (D) Net
Income (determined without giving effect to any current income taxes or any
change in deferred taxes), in each case, for all such fiscal quarters on a
cumulative basis, and (iii) no Default or Event of Default exists or would exist
after giving effect to such Restricted Payment.

     6C.  LIENS, DEBT, AND OTHER RESTRICTIONS.  The Company will not:

     6C(1).  LIENS.  Create, assume or suffer to exist any Lien upon any of its
properties or assets, whether now owned or hereafter acquired, or any income,
participation, royalty or profits therefrom (whether or not provision is made
for the equal and ratable securing of the Notes in accordance with the
provisions of paragraph 5C), except for the Liens specified in clauses (i)
              ------------   ------                            -----------
through (xi) below (collectively, "PERMITTED LIENS");
        ----                                         

          (i)    Liens for taxes, assessments or other governmental levies or
     charges not yet due or which are subject to a Good Faith Contest;

          (ii)   statutory Liens of landlords and Liens of carriers,
     contractors, warehousemen, mechanics and materialmen incurred in the
     ordinary course of business for sums not yet due or which are subject to a
     Good Faith Contest;

          (iii)  Liens (other than any Lien imposed by the Employee Retirement
     Income Security Act of 1974, as amended ("ERISA")) incurred, or deposits
     made, in the ordinary course of business (A) in connection with workers'
     compensation, unemployment insurance, old age benefit and other types of
     social security, (B) to secure (or to obtain letters of credit that secure)
     the performance of tenders, statutory obligations, surety and appeal bonds,
     bids, leases, performance bonds, purchase, construction, government or
     sales contracts and other similar obligations or (C) otherwise to satisfy
     statutory or legal obligations; provided, that in each such case 
                                     --------                              

                                       7

 
     such Liens (1) were not incurred or made in connection with the incurrence
     or maintenance of Indebtedness, the borrowing of money, the obtaining of
     advances or credit, and (2) do not in the aggregate materially detract from
     the value of the property or assets so encumbered or materially impair the
     use thereof in the operation of its business;

          (iv)   Liens existing (A) prior to the time of acquisition upon any
     property acquired by the Company through purchase, merger or consolidation
     or otherwise, whether or not expressly assumed by the Company, or (B)
     placed on property at the time of acquisition by the Company or to secure
     all or a portion of (or to secure Debt incurred to pay all or a portion of)
     the purchase price thereof; provided that such Lien shall not have been
                                 --------                                   
     created, incurred or assumed in contemplation of such purchase, merger,
     consolidation or other event;

          (v)    Liens now or hereafter required by this Agreement;

          (vi)    Liens in existence on the date hereof as set forth on Schedule
                                                                        --------
     6C(1) hereto;
     -----        

          (vii)  leases, subleases, licenses and sublicenses granted to third
     parties not interfering in any material respect with the business of the
     Company;

          (viii) minor survey exceptions or minor encumbrances, easements or
     reservations, or rights of others for rights-of-way, utilities and other
     similar purposes, or zoning or other restrictions as to use of real
     property, that are necessary for the conduct of the operations of the
     Company or that customarily exist on properties of corporations engaged in
     similar businesses and are similarly situated and that do not in any event
     materially impair their use in the operations of the Company;

          (ix)   any attachment or judgment Lien, unless the judgment it secures
     shall not, within 60 days after the entry thereof, have been discharged or
     execution thereof stayed pending appeal, or shall not have been discharged
     within 60 days after the expiration of any such stay; provided the
                                                           --------    
     aggregate amount of such attachment or judgment Liens shall not secure
     obligations in excess of $10,000,000 at any time;

          (x)   Liens other than those described in clauses (i) through (ix)
                                                    -----------         ----
     above that secure Debt permitted by clauses (i) and (ii) of paragraph
                                         -----------     ----    ---------
     6C(2); provided that no Default or Event of Default shall exist and be
            --------                                                       
     continuing or shall result therefrom; or

          (xi)   any Lien renewing, extending or refunding any Lien permitted by
     clause (x) above.
     ----------       

     6C(2).  DEBT.  Create, incur, assume or in any other way become liable in
respect of any Debt, except
                     ------

                                       8

 
          (i)    the Notes;

          (ii)   Funded Debt of the Company described in Schedule 6C(2) and
                                                         --------------    
     outstanding as of the date hereof; and

          (iii)  additional Funded Debt of the Company in an amount, which when
     added to all other Funded Debt of the Company then outstanding (but
     excluding the Funded Debt evidenced by the Notes and the Other EC Notes),
     does not exceed $1,000,000,000 at any one time outstanding.

     6C(3).  LOANS, ADVANCES, INVESTMENTS AND CONTINGENT LIABILITIES.  Make or
permit to remain outstanding any loan or advance to, or extend credit other than
credit extended in the normal course of business to any Person who is not an
Affiliate of the Company to, or Guarantee, directly or indirectly, in connection
with the obligations, stock or dividends of, or own, purchase or acquire any
stock, obligations or securities of, or any other interest in, or make any
capital contribution to, any Person, or commit to do any of the foregoing, (all
of the foregoing collectively being "INVESTMENTS"), except for the Investments
                                                    ------                    
set forth in clauses (i) through (ix) below (collectively, "PERMITTED
             -----------         ----                                
INVESTMENTS"):

          (i)    obligations backed by the full faith and credit of the United
     States Government (whether issued by the United States Government or an
     agency thereof), and obligations guaranteed by the United States
     Government, in each case which mature within one year from the date
     acquired;

          (ii)   demand and time deposits with, Eurodollar deposits with or
     certificates of deposit issued by any commercial bank or trust company (1)
     organized under the laws of the United States or any of its states or
     having branch offices therein, (2) having equity capital in excess of
     $100,000,000 and (3) which issues either (x) senior debt securities rated A
     or better by S&P, A or better by Moody's or (y) commercial paper rated A-2
     or better by S&P or Prime-2 or better by Moody's (or, in either case, an
     equivalent rating from another nationally recognized credit rating agency)
     ("RATED BANKS"), in each case payable in the United States in United States
     dollars and in each case which mature within one year from the date
     acquired;

          (iii)  marketable commercial paper and loan participations rated A-1
     or better by S&P or P-1 or better by Moody's (or, in either case, an
     equivalent rating from another nationally recognized credit rating agency)
     and maturing not more than 270 days from the date acquired;

          (iv)   bonds, debentures, notes or similar debt instruments issued by
     a state or municipality given a "AA" rating or better by S&P or an
     equivalent rating by another nationally recognized credit rating agency and
     maturing not more than one year from the date acquired;

                                       9

 
          (v)    the loans, investments and advances existing as of the date
     hereof and listed on Schedule 6C(3) hereto;
                          --------------        

          (vi)   repurchase agreements and similar commercial undertakings for
     terms of less than one year with any Rated Bank, provided that such
                                                      --------          
     repurchase agreements or undertakings are secured and collateralized by
     obligations backed by the full faith and credit of the United States
     Government in aggregate face amount equal to or greater than the
     obligations so secured;

          (vii)  money market mutual funds that (A) are denominated in U.S.
     Dollars, (B) have average asset maturities not in excess of 365 days, (C)
     have total invested assets in excess of $1,000,000,000 and (D) invest
     exclusively in Permitted Investments other than those described in Clause
                                                                        ------
     (ix) below, or are rated at least BBB- by S&P;
     ----                                          

          (viii) bonds, debentures, notes or similar debt instruments issued by
     a corporation organized and existing under the laws of any state of the
     United States of America or the District of Columbia and having a long term
     credit rating of BBB-or better from S&P or Baa3 or better from Moody's; and

          (ix)   Commercial Mortgage Loans and ABS originated, purchased or
     acquired by the Company in the ordinary course of its business, provided
     that any such Commercial Mortgage Loan or ABS shall comply with the
     investment guidelines set forth on Exhibit C hereto at the time of
                                        ---------                      
     origination, purchase, or acquisition by the Company; and further provided,
     that at all times the Company's portfolio of Investments, taken as a whole,
     shall be in compliance with such investment guidelines.

     6C(4).  MERGER AND CONSOLIDATION.  Merge or consolidate with any other
Person, except that the Company may consolidate or merge with any other
corporation if (A) the Company shall be the continuing or surviving corporation
and (B) no Default or Event of Default exists or would exist after giving effect
to such merger or consolidation.

     6C(5).  TRANSFER OF ASSETS.  Transfer, or agree or otherwise commit to
Transfer, a substantial portion of its assets.

     6C(6)   ISSUANCE OF ADDITIONAL UNSECURED NOTES.  Issue any unsecured notes
of the Company which are rated lower than the rating of the Notes on the date
hereof.

     7.   EVENTS OF DEFAULT.

     7A.  ACCELERATION.  If any of the following events shall occur and be
continuing for any reason whatsoever (and whether such occurrence shall be
voluntary or involuntary or come about or be effected by operation of law or
otherwise):

                                       10

 
          (i)    the Company defaults in the payment of any principal of or
     Yield-Maintenance Amount payable with respect to any Note when the same
     shall become due, either by the terms thereof or otherwise as herein
     provided; or

          (ii)   the Company defaults in the payment of any interest on any Note
     for more than 10 days after the date due; or

          (iii)  the Company defaults (whether as primary obligor or as
     guarantor or other surety) in any payment of principal of or interest on
     any other Debt (other than secured Debt which is non-recourse to the
     Company) beyond any period of grace provided with respect thereto, or the
     Company fails to perform or observe any other agreement, term or condition
     contained in any agreement under which any such Debt is created (or if any
     other event thereunder or under any such agreement shall occur and be
     continuing) and the effect of such failure or other event is to cause, or
     to permit the holder or holders of such (or a trustee on behalf of such
     holder or holders) to cause, such Debt to become due (or to be repurchased
     by the Company) prior to any stated maturity, provided that the aggregate
     amount of all Debt as to which such a payment default shall occur and be
     continuing or such a failure or other event causing or permitting
     acceleration (or resale to the Company) shall occur and be continuing
     exceeds an amount equal to the lesser of (x) $10,000,000 and (y) 5% of the
     net assets of the Company as reflected on its most recent balance sheet at
     the time of determination; or

          (iv)   any representation or warranty made by or on behalf of the
     Company or any of its officers herein or in any other writing furnished in
     connection with or pursuant to this Agreement or the transactions
     contemplated hereby shall be false in any material respect on the date as
     of which made; or

          (v)    the Company fails to perform or observe any agreement contained
     in paragraph 6; or
        -----------    

          (vi)   the Company fails to perform or observe any other agreement,
     term or condition contained herein and such failure shall not be remedied
     within 30 days after the Company receives written notice of such default
     from any holder of a Note; or

          (vii)  the Company makes an assignment for the benefit of creditors or
     is generally not paying its debts as such debts become due; or

          (viii) any decree or order for relief in respect of the Company is
     entered under any bankruptcy, reorganization, compromise, arrangement,
     insolvency, readjustment of debt, dissolution or liquidation or similar
     law, whether now or hereafter in effect (herein called the "BANKRUPTCY
     LAW"), of any jurisdiction; or

                                       11

 
          (ix)   the Company petitions or applies to any tribunal for, or
     consents to, the appointment of, or taking possession by, a trustee,
     receiver, custodian, liquidator or similar official of the Company, or of
     any substantial part of the assets of the Company, or commences a voluntary
     case under the Bankruptcy Law of the United States or any proceedings
     relating to the Company under the Bankruptcy Law of any other jurisdiction;
     or

          (x)    any such petition or application is filed, or any such
     proceedings are commenced, against the Company and the Company by any act
     indicates its approval thereof, consent thereto or acquiescence therein, or
     an order, judgment or decree is entered appointing any such trustee,
     receiver, custodian, liquidator or similar official, or approving the
     petition in any such proceedings, and such order, judgment or decree
     remains unstayed and in effect for more than 60 days; or

          (xi)   any order, judgment or decree is entered in any proceedings
     decreeing the dissolution of the Company and such order, judgment or decree
     remains unstayed and in effect for more than 60 days; or

          (xii)  one or more final judgments in an aggregate amount in excess of
     $10,000,000 is rendered against the Company and, within 60 days after entry
     thereof, a solvent insurance carrier or carriers have not confirmed in
     writing that each such judgment is fully insured or any such judgment is
     not discharged or execution thereof stayed pending appeal, or within 60
     days after the expiration of any such stay, any such judgment is not
     discharged;

     then (a) if such event is an Event of Default specified in clauses (i) or
                                                                -----------   
     (ii) of this paragraph 7A, the holder of any Note (other than the Company
     ----         ------------                                                
     or any of its Affiliates) may at its option during the continuance of such
     Event of Default, by notice in writing to the Company, declare such Note to
     be, and such Note shall thereupon be and become, immediately due and
     payable at par, together with interest accrued thereon, without
     presentment, demand, protest or other notice of any kind, all of which are
     hereby waived by the Company, (b) if such event is an Event of Default
     specified in clause (viii), (ix) or (x) of this paragraph 7A, all of the
                  -------------  ----    ---         ------------            
     Notes at the time outstanding shall automatically become immediately due
     and payable, together with interest accrued thereon and the Yield-
     Maintenance Amount, if any and to the extent permitted by law, with respect
     to each Note, without presentment, demand, protest or notice of any kind,
     all of which are hereby waived by the Company, and (c) with respect to any
     other event constituting an Event of Default, the Required Holder(s) may,
     at its or their option, by notice in writing to the Company, declare all of
     the Notes to be, and all of the Notes shall thereupon be and become,
     immediately due and payable together with interest accrued thereon and
     together with the Yield-Maintenance Amount, if any, with respect to each
     Note, without presentment, demand, protest or other notice of any kind, all
     of which are hereby waived by the Company (provided that, so long as any BP
                                                -------- ----                   
     Party holds any Note(s), such BP Party may declare its Note(s) to be
     immediately due and payable with 

                                       12

 
     respect to any such other event constituting an Event of Default without
     the consent or approval of the other Holders).

          The Company acknowledges, and the parties hereto agree, that each
     holder of a Note has the right to maintain its investment in the Notes free
     from repayment by the Company (except as herein specifically provided for)
     and that the provision for payment of the Yield-Maintenance Amount by the
     Company in the event that the Notes are prepaid or are accelerated as a
     result of an Event of Default, is intended to provide compensation for the
     deprivation of such right under such circumstances.

          7B.  RESCISSION OF ACCELERATION.  At any time after any or all of the
     Notes shall have been declared immediately due and payable pursuant to
     paragraph 7A, the Required Holder(s) may, by notice in writing to the
     ------------                                                         
     Company, rescind and annul such declaration and its consequences if (i) the
     Company shall have paid all overdue interest on the Notes, the principal of
     and Yield-Maintenance Amount, if any, payable with respect to any Notes
     which have become due otherwise than by reason of such declaration, and
     interest on such overdue interest and overdue principal and Yield-
     Maintenance Amount at the applicable rate specified in the Notes, (ii) the
     Company shall not have paid any amounts which have become due solely by
     reason of such declaration, (iii) all Events of Default and Defaults, other
     than non-payment of amounts which have become due solely by reason of such
     declaration, shall have been cured or waived pursuant to paragraph 11C, and
                                                              -------------     
     (iv) no judgment or decree shall have been entered for the payment of any
     amounts due pursuant to the Notes or this Agreement.  Notwithstanding the
     foregoing, so long as any BP Holder holds any Note(s), only such BP Holder
     shall be permitted to rescind and annul any such declaration with respect
     to the Note(s) that it holds.  No such rescission or annulment shall extend
     to or affect any subsequent Event of Default or Default or impair any right
     arising therefrom.

          7C.  NOTICE OF ACCELERATION OR RESCISSION.  Whenever any Note shall be
     declared immediately due and payable pursuant to paragraph 7A or any such
                                                      ------------            
     declaration shall be rescinded and annulled pursuant to paragraph 7B, the
                                                             ------------     
     Company shall forthwith give written notice thereof to the holder of each
     Note at the time outstanding.

          7D.  OTHER REMEDIES.  If any Event of Default shall occur and be
     continuing, the holder of any Note may proceed to protect and enforce its
     rights under this Agreement and such Note by exercising such remedies as
     are available to such holder in respect thereof under applicable law,
     either by suit in equity or by action at law, or both, whether for specific
     performance of any covenant or other agreement contained in this Agreement
     or in aid of the exercise of any power granted in this Agreement.  No
     remedy conferred in this Agreement upon the holder of any Note is intended
     to be exclusive of any other remedy, and each and every such remedy shall
     be cumulative and shall be in addition to every other remedy conferred
     herein or now or hereafter existing at law or in equity or by statute or
     otherwise.

                                       13

 
          8.   REPRESENTATIONS, COVENANTS AND WARRANTIES. The Company
     represents, covenants and warrants as follows:

          8A.  ORGANIZATION.  The Company is a corporation duly organized and
     existing in good standing under the laws of the State of Delaware, and is
     duly qualified as a foreign corporation and is in good standing in each
     jurisdiction in which such qualification is required by law, other than
     those jurisdictions as to which the failure to be so qualified or in good
     standing would not, individually or in the aggregate, reasonably be
     expected to have a Material Adverse Effect.  The Company has the corporate
     power and authority to own or hold under lease the properties it purports
     to own or hold under lease, to transact the business it transacts and
     proposes to transact, to execute and deliver this Agreement and the Notes
     and to perform the provisions hereof and thereof.  The Company has no
     Subsidiaries.

          8B.  FINANCIAL STATEMENTS.  The Company has furnished you with the
     unaudited financial statements, certified by a principal financial officer
     of the Company:  a balance sheet of the Company as of June 30, 1998 and
     statements of income, stockholders' equity and cash flows for the six-month
     period ended on such date, prepared by the Company.  To the Company's
     knowledge, such financial statements are true and correct in all material
     respects (subject, as to interim statements, to changes resulting from
     audits and year-end adjustments), have been prepared in accordance with
     GAAP consistently followed throughout the periods involved and show all
     liabilities, direct and contingent, of the Company required to be shown in
     accordance with such principles.  To the Company's knowledge, the balance
     sheets fairly present the condition of the Company as at the dates thereof,
     and the statements of income, stockholders' equity and cash flows fairly
     present the results of the operations of the Company and its cash flows for
     the periods indicated. To the knowledge of the Company, there has been no
     material adverse change in the business, condition (financial or otherwise)
     or operations of the Company since June 30, 1998.

          8C.  ACTIONS PENDING.  There is no action, suit, investigation or pro
     ceeding pending or, to the knowledge of the Company, threatened against the
     Company, or any properties or rights of the Company, by or before any
     court, arbitrator or administrative or governmental body which (i) might
     result in a Material Adverse Effect or (ii) purports to affect the validity
     or enforceability of this Agreement, any Note issued hereunder or the
     transactions contemplated hereby.

          8D.  TAXES.  The Company has filed all federal, state and other income
     tax returns which, to the knowledge of the officers of the Company, are
     required to be filed, and has paid all taxes as shown on such returns and
     on all assessments received by it to the extent that such taxes have become
     due, except such taxes as are subject to a Good Faith Contest.

                                       14

 
          8E.  CONFLICTING AGREEMENTS AND OTHER MATTERS.  The Company is not a
     party to any contract or agreement or subject to any charter or other
     corporate restriction which materially and adversely affects its business,
     property or assets, or financial condition.  Neither the execution nor
     delivery of this Agreement or the Notes, nor the offering, issuance and
     sale of the Notes, nor fulfillment of nor compliance with the terms and
     provisions hereof and of the Notes will materially conflict with, or result
     in a material breach of the terms, conditions or provisions of, or
     constitute a default under, or result in any material violation of, or
     result in the creation of any Lien upon any of the properties or assets of
     the Company pursuant to, the charter or by-laws of the Company, any award
     of any arbitrator or any agree  ment (including any agreement with
     stockholders), instrument, order, judgment, decree, statute, law, rule or
     regulation to which the Company is subject.  Except as set forth in
     Schedule 8E attached hereto, the Company is not a party to, or otherwise
     -----------                                                             
     subject to any provision contained in, any instrument evidencing
     Indebtedness of the Company, any agreement relating thereto or any other
     contract or agreement (including its charter) which limits the amount of,
     or otherwise imposes restrictions on the incurring of, Debt of the Company
     of the type to be evidenced by the Notes.

          8F.  OFFERING OF NOTES.  Neither the Company nor any agent acting on
     its behalf has, directly or indirectly, offered the Notes or any similar
     security of the Company for sale to, or solicited any offers to buy the
     Notes or any similar security of the Company from, or otherwise approached
     or negotiated with respect thereto with, any Person other than
     Institutional Investors, and neither the Company nor any agent acting on
     its behalf has taken or will take any action which would subject the
     issuance or sale of the Notes to the provisions of section 5 of the
     Securities Act or to the provisions of any securities or Blue Sky law of
     any applicable  jurisdiction.

          8G.  USE OF PROCEEDS.  The Company does not own or have any present
     intention of acquiring any "margin stock" as defined in Regulation U (12
     CFR Part 207) of the Board of Governors of the Federal Reserve System
     (herein called "MARGIN STOCK").  The proceeds of sale of the Notes will be
     used to purchase Commercial Mortgage Loans and/or marketable debt
     securities, including, but not limited to, ABS.  None of such proceeds will
     be used, directly or indirectly, for the purpose, whether immediate,
     incidental or ultimate, of purchasing or carrying any margin stock or for
     the purpose of maintaining, reducing or retiring any Indebtedness which was
     originally incurred to purchase or carry any stock that is currently a
     margin stock or for any other purpose which might constitute this
     transaction a "purpose credit" within the meaning of such Regulation U.
     Neither the Company nor any agent acting on its behalf has taken or will
     take any action which might cause this Agreement or the Notes to violate
     Regulation U, Regulation T or any other regulation of the Board of
     Governors of the Federal Reserve System or to violate the Exchange Act, in
     each case as in effect now or as the same may hereafter be in effect.

          8H.  ERISA.  The Company has no retirement or employee benefit plans
     subject to ERISA.

                                       15

 
          8I.  GOVERNMENTAL CONSENT.  No circumstance in connection with the
     offering, issuance, sale or delivery of the Notes is such as to require any
     authorization, consent, approval, exemption or other action by or notice to
     or filing with any court or administrative or governmental body in
     connection with the execution and delivery of this Agreement, the offering,
     issuance, sale or delivery of the Notes or fulfillment of or compliance
     with the terms and provisions hereof or of the Notes, if the failure to
     obtain any such consent would have a Material Adverse Effect.

          8J.  COMPLIANCE WITH LAWS.  The Company and all of its properties and
     facilities have complied at all times in all material respects with all
     federal, state, local and regional statutes, laws, ordinances and judicial
     or administrative orders, judgments, rulings and regulations, except, in
     any such case, where failure to comply would not result in a Material
     Adverse Effect on the business, condition (financial or otherwise) or
     operations of the Company.

          8K.  INVESTMENT COMPANY STATUS.  Neither the Company nor any
     Subsidiary is an "investment company" or a company "controlled" by an
     "investment company" within the meaning of the Investment Company Act of
     1940, as amended, or an "investment adviser" within the meaning of the
     Investment Advisers Act of 1940, as amended.

          8L.  DUE AUTHORIZATION, ETC.  This Agreement and the Notes have been
     duly authorized by all necessary corporate action on the part of the
     Company, and this Agreement constitutes, and upon execution and delivery
     thereof each Note will constitute, a legal, valid and binding obligation of
     the Company enforceable against the Company in accordance with its terms,
     except as such enforceability may be limited by (i) applicable bankruptcy,
     insolvency, reorganization, moratorium or other similar laws affecting the
     enforcement of creditors' rights generally and (ii) general principles of
     equity (regardless of whether such enforceability is considered in a
     proceeding in equity or at law).

          8M.  DISCLOSURE.  Neither this Agreement nor any other document,
     certificate or statement furnished to you by or on behalf of the Company in
     connection herewith contains any untrue statement of a material fact or
     omits to state a material fact necessary in order to make the statements
     contained herein and therein not misleading.  There is no fact peculiar to
     the Company which materially adversely affects or in the future may (so far
     as the Company can now foresee) materially adversely affect the business,
     property or assets, or financial condition of the Company and which has not
     been set forth in this Agreement or in the other docu  ments, certificates
     and written statements furnished to you and Boston Properties Limited
     Partnership, a Delaware limited partnership by or on behalf of the Company
     prior to the date hereof in connection with the transactions contemplated
     hereby.

                                       16

 
          8N.  INVESTMENTS.  All mortgage loans owned by the Company as of the
     date of this Agreement are Commercial Mortgage Loans which are not in
     default beyond any applicable cure periods pursuant to the terms thereof,
     and the Company has not extended any of the cure periods provided in the
     loan documents governing, evidencing and securing such Commercial Mortgage
     Loans and originally executed in connection therewith beyond the applicable
     cure periods provided in such loan documents.

          8O.  ENVIRONMENTAL MATTERS.  Except as disclosed on Schedule 8O
                                                              -----------
     hereto, the Company (i) has complied in all material respects with all
     applicable Environmental Laws, and the Company has not received (A) notice
     of any material failure so to comply, (B) any letter or request for
     information under Section 104 of CERCLA or comparable state laws or (C) any
     information that would lead it to believe that it is the subject of any
     federal, state or local investigation concerning Environmental Laws; (ii)
     does not manage, generate, transport, discharge or store any Hazardous
     Material in material violation of any material Environmental Laws; (iii)
     does not own, operate or maintain any underground storage tanks; and (iv)
     is not aware of any conditions or circumstances associated with its
     currently or previously owned or leased properties or operations (or those
     of any tenants of such properties) which may give rise to any liabilities
     under Environmental Laws which could have a Material Adverse Effect.

          9.  REPRESENTATIONS OF THE PURCHASER.  You represent that you are not
     acquiring the Notes to be purchased by you hereunder with a view to or for
     sale in connection with any distribution thereof within the meaning of the
     Securities Act, provided that the disposition of your property shall at all
     times be and remain within your control.  You understand that the Notes
     have not been registered under the Securities Act and may be resold only if
     registered pursuant to the provisions of the Securities Act or if an
     exemption from registration is available, except under circumstances where
     neither such registration nor such an exemption is required by law, and
     that the Company is not required to register the Notes.

          10.  DEFINITIONS; ACCOUNTING MATTERS.  For the purpose of this
     Agreement, the terms defined in paragraphs 10A and 10B (or within the text
                                     --------------     ---                    
     of any other paragraph) shall have the respective meanings specified
     therein and all accounting matters shall be subject to determination as
     provided in paragraph 10C.
                 ------------- 

          10A.  YIELD-MAINTENANCE TERMS.

               "BUSINESS DAY" shall mean any day other than a Saturday, a Sunday
     or a day on which commercial banks in New York City are required or
     authorized to be closed.

                                       17

 
               "CALLED PRINCIPAL" shall mean, with respect to any Note, the
     princi pal of such Note that is to be prepaid pursuant to paragraph 4 or is
                                                               -----------      
     declared to be immediately due and payable pursuant to paragraph 7A, as the
                                                            ------------        
     context requires.

               "DISCOUNTED VALUE" shall mean, with respect to the Called
     Principal of any Note, the amount obtained by discounting all Remaining
     Scheduled Payments with respect to such Called Principal from their
     respective scheduled due dates to the Settlement Date with respect to such
     Called Principal, in accordance with accepted financial practice and at a
     discount factor (as converted to reflect the periodic basis on which
     interest on the Notes is payable, if interest is payable other than on a
     semi-annual basis) equal to the Reinvestment Yield with respect to such
     Called Principal.

               "REINVESTMENT YIELD" shall mean, with respect to the Called
     Princi pal of any Note, the offered-side yield to maturity, as of 10:00
     a.m. (New York City time) on the Business Day next preceding the Settlement
     Date with respect to such Called Principal, of the U.S. Treasury security
     that was used to determine the then Treasury of such Investment Note.

               "REMAINING AVERAGE LIFE" shall mean, with respect to the Called
     Principal of any Note, the number of years (calculated to the nearest one-
     twelfth year) obtained by dividing (i) such Called Principal into (ii) the
     sum of the products obtained by multiplying (a) each Remaining Scheduled
     Payment of such Called Principal (but not of interest thereon) by (b) the
     number of years (calculated to the nearest one-twelfth year) which will
     elapse between the Settlement Date with respect to such Called Principal
     and the scheduled due date of such Remaining Scheduled Payment.

               "REMAINING SCHEDULED PAYMENTS" shall mean, with respect to the
     Called Principal of any Note, all payments of such Called Principal and
     interest thereon that would be due on or after the Settlement Date through
     and including the Rate Reset Date (assuming that the entire principal
     balance and all accrued interest as of such Rate Reset Date will be repaid
     on such Rate Reset Date), if the Settlement Date precedes such Rate Reset
     Date, or alternatively, the Maturity Date if the Settlement Date occurs
     after the Rate Reset Date.

               "SETTLEMENT DATE" shall mean, with respect to the Called
     Principal of any Note, the date on which such Called Principal is to be
     prepaid pursuant to paragraph 4 or is declared to be immediately due and
                         -----------                                         
     payable pursuant to paragraph 7A, as the context requires.
                         ------------                          

               "YIELD-MAINTENANCE AMOUNT" shall mean, with respect to any Note,
     an amount equal to the excess, if any, of the Discounted Value of the
     Called Principal of such Note over the sum of (i) such Called Principal
     plus (ii) to the extent paid on the Settlement Date with the Called
     Principal, interest accrued thereon as of 

                                       18

 
     (including interest due on) the Settlement Date with respect to such Called
     Principal. The Yield-Maintenance Amount shall in no event be less than
     zero.

          10B.  OTHER TERMS.

                "ABS" shall mean mortgage, or other asset backed securities.

                "AFFILIATE" shall mean any Person directly or indirectly
     controlling, controlled by, or under direct or indirect common control
     with, the Company.  A Person shall be deemed to control a corporation if
     such Person possesses, directly or indirectly, the power to direct or cause
     the direction of the management and policies of such corporation, whether
     through the ownership of voting securities, by contract or otherwise.

                "BANKRUPTCY LAW" shall have the meaning specified in clause
                                                                    ------
     (viii) of paragraph 7A.
     ------    ------------ 

                "BIG FIVE ACCOUNTING FIRM" shall mean any of Arthur Andersen,
     Deloitte & Touche, KPMG Peat Marwick, PricewaterhouseCoopers and Ernst &
     Young.

                "BP PARTY" shall mean Boston Properties Limited Partnership, a
     Delaware limited partnership, and any Affiliate thereof, and shall also
     include, in all events, One Embarcadero Center Venture, a California
     general partnership.

                "CASH FLOW" shall mean, in respect of any period, the sum of (a)
     Net Income for such period and (b) the amount of all depreciation and
     amortization allowances and other non-cash expenses of the Company but only
     to the extent deducted in the determination of Net Income for such period.

                "CERCLA" shall mean the Comprehensive Environmental Response,
     Compensation and Liability Act of 1980, as amended.

                "CODE" shall mean the Internal Revenue Code of 1986, as amended.

                "COMMERCIAL MORTGAGE LOANS" shall mean commercial mortgage loans
     made in substantial conformance with (x) standards prevailing in the
     commercial loan mortgage marketplace and (y) the guidelines contained in
                                                                             
     Exhibit C hereto.
     ---------        

                "CURRENT DEBT" shall mean, with respect to the Company, all
     Indebtedness for borrowed money which by its terms or by the terms of any
     instrument or agreement relating thereto matures on demand or within one
     year from the date of the creation thereof and is not directly or
     indirectly renewable or extendible at the option of the debtor to a date
     more than one year from the date of 

                                       19

 
     the creation thereof, provided that Indebtedness for borrowed money
     outstanding under a revolving credit or similar agreement which obligates
     the lender or lenders to extend credit over a period of more than one year
     shall constitute Funded Debt and not Current Debt, even though such
     Indebtedness by its terms matures on demand or within one year from the
     date of the creation thereof.

                "DEBT" shall mean Current Debt and Funded Debt.

                "DEBT SERVICE" shall mean, with respect to any period, the sum
     of the following: (a) Interest Charges for such period, and (b) all
     payments of principal in respect of Debt of the Company paid or payable
     during such period.

                "DEBT SERVICE COVERAGE RATIO" shall mean, at any time of
     determination, the ratio of (a) Cash Flow for the most recent fiscal
     quarter to (b) Debt Service for such fiscal quarter.

                "DEFAULT" shall mean any of the events specified in paragraph
     7A, whether or not any requirement for such event to become an Event of
     Default has been satisfied.

               "DUFF & PHELPS" shall mean Duff & Phelps Corporation.

               "ENVIRONMENTAL LAWS" shall mean all laws relating to pollution,
     the release or other discharge, handling, disposition or treatment of
     Hazardous Materials and other substances or the protection of the
     environment or of employee health and safety, including, without
     limitation, CERCLA, the Hazardous Material Transportation Act (49 U.S.C.
     Section 1801 et. seq.), the Resource Conservation and Recovery Act (42
     U.S.C. Section 7401 et. seq.), the Clean Air Act (42 U.S.C. Section 401 et.
     seq.), the Toxic Substances Control Act (15 U.S.C. Section 651 et. seq.)
     and the Emergency Planning and Community Right-To-Know Act (42 U.S.C.
     Section 11001 et. seq.), each as the same may be amended and supplemented.

               "EVENT OF DEFAULT" shall mean any of the events specified in para
                                                                            ----
     graph 7A, provided that there has been satisfied any requirement in
     --------                                                           
     connection with such event for the giving of notice, or the lapse of time,
     or the happening of any further condition, event or act.

               "EQUITY REDEMPTION LOAN" shall mean that certain loan in the
     aggregate principal amount of $328,143,000 by Bankboston, N.A., The Chase
     Manhattan Bank, Fleet National Bank, PNC Bank, National Association,
     Dresdner Bank AG New York Branch and Grand Cayman Branch, The Bank of New
     York, Key Bank National Association and Citizens Bank (and other banks
     which may become parties to the Term Loan Agreement described immediately
     below) to you, One Embarcadero Center Venture, Three Embarcadero Center
     Venture and 

                                       20

 
     Embarcadero Center Associates pursuant to that certain Term Loan Agreement
     dated as of November 12, 1998.

               "EXCHANGE ACT" shall mean the Securities Exchange Act of 1934, as
     amended.

               "FITCH" shall mean Fitch IVCA, Inc.

               "FUNDED DEBT" shall mean, with respect to any Person, all
     Indebtedness of such Person which by its terms or by the terms of any
     instrument or agreement relating thereto matures, or which is otherwise
     payable or unpaid, more than one year from, or is directly or indirectly
     renewable or extendible at the option of the debtor to a date more than one
     year (including an option of the debtor under a revolving credit or similar
     agreement obligating the lender or lenders to extend credit over a period
     of more than one year) from, the date of the creation thereof, including
     current maturities of long-term debt that appear as current liabilities in
     accordance with GAAP.

               "GAAP" shall have the meaning set forth in paragraph 10C.
                                                          ------------- 

               "GOOD FAITH CONTEST" shall mean, with respect to any tax,
     assessment, Lien, obligation, claim, liability, judgment, injunction,
     award, decree, order, law, regulation, statute or similar item, any
     challenge or contest thereof by appropriate proceedings timely initiated in
     good faith by the Company for which adequate reserves therefor have been
     taken in accordance with GAAP.

               "GUARANTEE" shall mean, with respect to any Person, any direct or
     indirect liability, contingent or otherwise, of such Person with respect to
     any indebtedness, lease, dividend or other obligation of another,
     including, without limitation, any such obligation directly or indirectly
     guaranteed, endorsed (otherwise than for collection or deposit in the
     ordinary course of business) or discounted or sold with recourse by such
     Person, or in respect of which such Person is otherwise directly or
     indirectly liable, including, without limitation, any such obligation in
     effect guaranteed by such Person through any agreement (contingent or
     otherwise) to

            (i) purchase, repurchase or otherwise acquire such obligation or any
          security therefor, or to provide funds for the payment or discharge of
          such obligation (whether in the form of loans, advances, stock
          purchases, capital contributions or otherwise);

          (ii) maintain the solvency or any balance sheet or other financial
          condition of the obligor of such obligation; or

                                       21

 
          (iii) pay the purchase price for goods or services regardless of the
          non-delivery or non-furnishing thereof, in any such case if the
          purpose, intent or effect of such agreement is to provide assurance
          that such obligation will be paid or discharged, or that any
          agreements relating thereto will be complied with, or that the holders
          of such obligation will be protected against loss in respect thereof.

     The amount of any Guarantee shall be equal to the outstanding principal
     amount of the obligation guaranteed or such lesser amount to which the
     maximum exposure of the guarantor shall have been specifically limited.

               "HAZARDOUS MATERIALS"  shall mean (i) any material or substance
     defined as or included in the definition of "hazardous substances",
     "hazardous wastes", "hazardous material", "toxic substances" or any other
     formulations intended to define, list or classify substances by reason of
     their deleterious properties, (ii) any oil, petroleum or petroleum derived
     substance, (iii) any flammable substances or explosives, (iv) any
     radioactive materials, (v) asbestos in any form, (vi) electrical equipment
     that contains any oil or dielectric fluid containing levels or
     polychlorinated biphenyls in excess of 50 parts per million, (vii)
     pesticides or (viii) any other chemical, material or substance, exposure to
     which is prohibited, limited or regulated by any governmental agency or
     authority or which may or could pose a hazard to the health and safety of
     persons in the vicinity thereof.

               "INCLUDING" shall mean, unless the context clearly requires
     otherwise, "including without limitation".

               "INDEBTEDNESS" shall mean, with respect to any Person and without
     duplication (i) all items (excluding items of contingency reserves or of
     reserves for deferred income taxes) which in accordance with GAAP would be
     included in determining total liabilities as shown on the liability side of
     a balance sheet of such Person as of the date on which Indebtedness is to
     be determined, other than Preferred Stock of such Person except as set
     forth in clause (iv) below; (ii) all indebtedness secured by any Lien on,
              -----------                                                     
     or payable out of the proceeds or production from, any property or asset
     owned or held by such Person, whether or not the indebtedness secured
     thereby shall have been assumed, (iii) all indebtedness of third parties,
     including joint ventures and partnerships of which such Person is a
     venturer or general partner, recourse to which may be had against such
     Person, (iv) redemption obligations in respect of mandatorily redeemable
     Preferred Stock; and (v) all indebtedness and other obligations of others
     with respect to which such Person has become liable by way of a Guarantee.

               "INITIAL TREASURY" shall mean, for any Note, the yield to
     maturity implied by (i) the bid-side yields reported, as of 10:00am (New
     York City time) (or, at your election, at such other time as we may
     mutually agree) on the Business Day next preceding the date upon which such
     Note is funded, on the display designated 

                                       22

 
     as "Page 678" on the Telerate Access Service, for actively traded U.S.
     Treasury securities having a maturity equal to the Rate Reset Date of such
     Note, or if such bid-side yields shall not be reported as of such time or
     the yields reported as of such time shall not be ascertainable, (ii) the
     Treasury Constant Maturity Series bid-side yields reported, for the latest
     day for which such yields shall have been so reported as of the Business
     Day next preceding the date upon which such Note is funded in Federal
     Reserve Statistical Release H.15 (519) (or any comparable successor
     publication) for actively traded U.S. Treasury securities having a constant
     maturity equal to the Rate Reset Date of such Note. Such implied yields
     shall be determined, if necessary, by (a) converting U.S. Treasury bill
     quotations to bond-equivalent yields in accordance with accepted financial
     practice and (b) interpolating linearly between yields reported for various
     maturities. Notwithstanding the foregoing, subject to the Company's written
     approval (which approval shall not be unreasonably withheld or delayed),
     you shall be entitled to select a different actively traded U.S. Treasury
     security (which shall have am maturity date approximately equal and
     reasonably comparable to the first Rate Reset Date of such Note) the bid-
     side yield to maturity of which shall be the Initial Treasury for purposes
     of such Note; provided, however, that if you select a different U.S.
                   --------  ------- 
     Treasury security which is approved by the Company pursuant to the
     foregoing or if a time other than 10:00 a.m. is used to determine the
     Initial Treasury, then the Margin for such Note shall be adjusted so that
     the interest rate on such Investment Note is no different than if you had
     not exercised your rights pursuant to this sentence to select a different
     U.S. Treasury or to agree to a different time for determining the Initial
     Treasury. Schedule 1 sets forth the definitive Initial Treasury for each
               ----------
     Note.

               "INSTITUTIONAL INVESTOR" shall mean any insurance company,
     commercial, investment or merchant bank, finance company, mutual fund,
     registered money or asset manager, savings and loan association, credit
     union, registered investment advisor, pension fund, investment company,
     licensed broker-dealer, "qualified institutional buyer" (as such term is
     defined under Rule 144A promulgated under the Securities Act, or any
     successor law, rule or regulation) or "accredited investor" (as such term
     is defined under Regulation D promulgated under the Securities Act, or any
     successor law, rule or regulation).

               "INTANGIBLES" shall mean, without duplication, all Intellectual
     Property and operating agreements, treasury stock, deferred or capitalized
     research and development costs, goodwill (including any amounts, however
     designated, representing the cost of acquisition of business and
     investments in excess of the book value thereof), unamortized debt discount
     and expense, any write-up of asset value after June 30, 1997 and any other
     amounts reflected in contra-equity accounts, and any other assets treated
     as intangible assets under GAAP.

               "INTELLECTUAL PROPERTY" shall mean all patents, trademarks,
     service marks, trade names, copyrights, brand names, mechanical or
     technical processes and 

                                       23

 
     paradigms, know-how, and similar intellectual property and applications,
     licenses and similar rights in respect of the same.

               "INTEREST CHARGES" shall mean, with respect to any period, the
     sum (without duplication) of the following: (a) all interest in respect of
     Debt of the Company deducted in determining Net Income for such period, and
     (b) all debt discount and expense amortized or required to be amortized in
     the determination of Net Income for such period.

               "INVESTMENTS" shall have the meaning provided in paragraph 6C(3).
                                                                --------------- 

               "LIEN" shall mean any mortgage, pledge, security interest,
     encumbrance, minimum or compensating deposit arrangement, lien (statutory
     or otherwise) or charge of any kind (including any agreement to give any of
     the foregoing, any conditional sale or other title retention agreement, any
     lease in the nature thereof, and the filing of or agreement to give any
     financing statement under the Uniform Commercial Code of any jurisdiction)
     or any other type of preferential arrangement for the purpose, or having
     the effect, of protecting a creditor against loss or securing the payment
     or performance of an obligation.

               "MARGIN" shall mean, for any Note, 165 basis points; provided
                                                                    --------
     that, if you select, for purposes of determining the Initial Treasury, a
     ----                                                                    
     different U.S. Treasury security from the U.S Treasury selected by the
     Company or if a time other than 10:00 a.m. is used to determine the Initial
     Treasury, in either case pursuant to your rights as described in the
     definition of Initial Treasury, then the Margin during the period of time
     commencing on the funding of the Investment Note until the first Rate Reset
     Date thereunder shall be adjusted as described in the last sentence of the
     definition of Initial Treasury and, from and after the first Rate Reset
     Date, the Margin shall again adjust to equal 165 basis points.  Schedule 1
                                                                     ----------
     sets forth the definitive initial Margin for each Note through the first
     Rate Reset Date of each Note.

               "MATERIAL ADVERSE EFFECT" shall mean (i) a material adverse
     effect on the business, assets, liabilities, operations, prospects or
     condition, financial or otherwise, of the Company, (ii) material impairment
     of the Company to perform any of its obligations under the Agreement and
     the Notes or (iii) material impairment of the validity or enforceability or
     the rights of, or the benefits available to, the holders of the Notes under
     this Agreement or the Notes.

               "MATURITY DATE" shall have the meaning set forth in paragraph 1
                                                                   -----------
     hereof.

               "MOODY'S" shall mean Moody's Investors Services, Inc., including
     the NCO/Moody's Commercial Division, or any successor Person.

                                       24

 
               "NET INCOME" shall mean, as to any period, consolidated gross
     revenues of the Company less all operating and non-operating expenses of
     the Company for such period, including all charges of a proper character
     (including current and deferred taxes on income, provision for taxes on
     unremitted foreign earnings which are included in gross revenues, and
     current additions to reserves), but not including in gross revenues the
     following:

          (i) any gains (net of expenses and taxes applicable thereto) in excess
     of losses resulting from the Transfer of capital assets (i.e., assets other
     than current assets);

          (ii) any gains resulting from the write-up of assets;

          (iii) any equity of the Company in the undistributed earnings (but not
     losses) of any corporation which is not a Subsidiary;

          (iv)  any earnings or losses of any Person acquired by the Company
     through purchase, merger, consolidation or otherwise for any fiscal period
     prior to the fiscal period in which the acquisition occurs;

          (v) gains or losses from the acquisition of securities or the
     retirement or extinguishment of Debt;

          (vi) gains on collections from insurance policies or settlements;

          (vii) any income or gain during such period from any change in
     accounting principles, from any discontinued operations or the disposition
     thereof, from any extraordinary items or from any prior period adjustment;

          (viii) in the case of a successor to the Company by consolidation or
     merger or as a transferee of its assets, any earnings of the successor
     corporation prior to such consolidation, merger or transfer of assets.

     If the preceding calculation results in a number less than zero, such
amount shall be considered a net loss.

               "OFFICER'S CERTIFICATE" shall mean a certificate signed in the
     name of the Company by its President, one of its Vice Presidents or its
     Treasurer.
 
               "OTHER EC NOTES" shall mean those certain senior promissory notes
     of the Company issued by the Company on the date hereof to (a) One
     Embarcadero Center Venture in the aggregate principal amount of $88,200,000
     (b) Three Embarcadero Center Venture in the aggregate principal amount of
     $76,897,000 and (c) Embarcadero Center Associates in the aggregate
     principal amount of $111,927,000.

                                       25

 
               "PERMITTED INVESTMENTS" shall have the meaning set forth in
                                                                          
     paragraph 6C(3).
     --------------- 

               "PERMITTED LIENS" shall have the meaning set forth in paragraph
                                                                     ---------
     6C(1).
     ----- 

               "PERSON" shall mean and include an individual, a partnership, a
     joint venture, a corporation, a limited liability company, a trust, an
     unincorporated organ  ization and a government or any department or agency
     thereof.

               "PHASE ONE" shall mean the closing and consummation of the
     transactions described in that certain Master Transaction Agreement dated
     as of September 28, 1998, by and among Prudential, PIC Realty Corporation,
     Fedmark Corporation, Embarcadero Center Investors Partnership, Pacific
     Property Services, L.P., the Persons listed on Exhibit A-1 attached
     thereto, Boston Properties Limited Partnership and Boston Properties, Inc.,
     which are to be consummated on the "Closing Date" (as defined in such
     Master Transaction Agreement).

               "PRUDENTIAL" shall mean The Prudential Insurance Company of
     America, a New Jersey mutual insurance company.

               "PRUDENTIAL GUARANTIED LOAN"  shall mean that certain loan   in
     the aggregate principal amount of $92,000,000 by The Chase Manhattan Bank
     and/or any of its subsidiaries or affiliates (the "BANK") to you, One
     Embarcadero Center Venture, Three Embarcadero Center Venture and
     Embarcadero Center Associates pursuant to that certain Term Loan Agreement
     dated as of November 12, 1998.

               "RATE RESET DATE", with respect to any Note, shall have the
     meaning set forth in such Note.

               "RATED BANK" shall have the meaning set forth in paragraph
                                                                ---------
     6C(3)(ii).
     --------- 

               "RELEASE" shall mean any release, spill, emission, leaking,
     pumping, injection, deposit, disposal, discharge, leaching or migration
     into the indoor or outdoor environment, including, without limitation, the
     movement of Hazardous Materials through ambient air, soil, surface water,
     ground water, wetlands, land or subsurface strata, in violation of
     applicable law or prudent business practice.

               "REQUIRED HOLDER(S)" shall mean the holder or holders of at least
     51% of the aggregate principal amount of the Notes from time to time
     outstanding, but shall include, in any event, the BP Parties so long as any
     BP Party holds a direct or indirect interest in any Note.

                                       26

 
               "RESET TREASURY" shall mean the yield to maturity implied by (i)
     the yields reported, as of 10:00am (New York City time) on the Business Day
     next preceding the Rate Reset Date for any Note, on the display designated
     as "Page 678" on the Telerate Access Service, for actively traded U.S.
     Treasury securities having a maturity equal to the earlier to occur of the
     next Rate Reset Date provided for in such Note (if any) and the Maturity
     Date of such Note, or if such yields shall not be reported as of such time
     or the yields reported as of such time shall not be ascertainable, (ii) the
     Treasury Constant Maturity Series yields reported, for the latest day for
     which such yields shall have been so reported as of the Business Day next
     preceding the Rate Reset Date in Federal Reserve Statistical Release H.15
     (519) (or any comparable successor publication) for actively traded U.S.
     Treasury securities having a constant maturity equal to the earlier to
     occur of the next Rate Reset Date provided for in such Note (if any) or the
     Maturity Date of such Note.  Such implied yields shall be determined, if
     necessary, by (a) converting U.S. Treasury bill quotations to bond-
     equivalent yields in accordance with accepted financial practice and (b)
     interpolating linearly between yields reported for various maturities.

               "RESPONSIBLE OFFICER" shall mean the chief executive officer,
     chief operating officer, chief financial officer or chief accounting
     officer of the Company or any other officer of the Company involved
     principally in its financial administration or its controllership function.

               "RESTRICTED INVESTMENT" shall mean any Investment other than a
     Permitted Investment.

               "RESTRICTED PAYMENTS" shall mean any of the following (provided
     that, notwithstanding anything to the contrary stated below, the term
     "Restricted Payments" does not include any distribution of capital gains by
     the Company to its shareholders):

          (i)  any dividend on any class of the Company's capital stock at any
     time after the date hereof;

          (ii) any other distribution on account of any class of the Company's
     capital stock;

          (iii) any redemption, purchase or other acquisition, direct or
     indirect, of any shares of the Company's capital stock;

          (iv)  any unscheduled payment of principal of, or retirement,
     redemption, purchase or other acquisition of, any subordinated debt,
     including subordinated debt that is convertible into equity of the Company;

          (v)  any Restricted Investment;

                                       27

 
               "S&P" shall mean Standard and Poor's Corporation, or any
     successor Person.

               "SECURITIES ACT" shall mean the Securities Act of 1933, as
     amended.

               "SHAREHOLDER" shall mean and include any Person who owns,
     beneficially or of record, directly or indirectly, at any time during any
     year with respect to which a computation is being made 5% or more of the
     outstanding voting stock of the Company.

               "SIGNIFICANT HOLDER" shall mean (i) any BP Party, so long as any
     BP Party shall hold (or be committed under this Agreement to purchase) any
     Note, or (ii) any other holder of at least 5% of the aggregate principal
     amount of the Notes from time to time outstanding.

               "SUBSIDIARY" shall mean any corporation or other entity at least
     51% of the total combined voting power of all classes of Voting Stock or
     similar securities of which shall, at the time as of which any
     determination is being made, be owned by the Company either directly or
     through Subsidiaries.

               "TOTAL ASSETS" shall mean, as at any time of determination, the
     total assets of a Person recorded on a balance sheet of such Person
     prepared in accordance with GAAP.

               "TRANSFER" shall mean, with respect to any item, the sale,
     exchange, conveyance, lease, transfer or other disposition of such item.

               "TRANSFEREE" shall mean any direct or indirect transferee of all
     or any part of any Note purchased by you under this Agreement.

               "TREASURY" shall mean, for any Note, the Initial Treasury or the
     then Reset Treasury, as the case may be, upon which the Margin under such
     Note is added to obtain the interest rate of such Note.

               "VOTING STOCK" shall mean, with respect to any corporation, any
     shares of stock of such corporation whose holders are entitled under
     ordinary circumstances to vote for the election of directors of such
     corporation (irrespective of whether at the time stock of any other class
     or classes shall have or might have voting power by reason of the happening
     of any contingency), and, with respect to any other entity, any similar
     security of such entity.

          10C. ACCOUNTING AND LEGAL PRINCIPLES, TERMS AND  DETERMINATIONS.  All
     references in this Agreement to "GAAP" shall mean generally accepted
     accounting principles, as in effect in the United States from time to time.
     Unless otherwise specified herein, all accounting terms used herein shall
     be interpreted, all

                                       28

 
     determinations with respect to accounting matters hereunder shall be made,
     and all unaudited financial statements and certificates and reports as to
     financial matters required to be furnished hereunder shall be prepared, in
     accordance with GAAP (except as set forth in the next succeeding sentence
     of this paragraph 10C), applied on a basis consistent with the most recent
             -------------
     audited financial statements of the Company delivered pursuant to paragraph
                                                                       ---------
     5A(i) or (ii) or, if no such statements have been so delivered, the most
     -----    ---- 
     recent audited financial statements referred to in clause (i) of paragraph
                                                        ----------    ---------
     8B. Notwithstanding the foregoing, however, quarterly financial statements
     --
     shall not include notes to financial statements and to that extent such
     statements will not have been prepared in accordance with GAAP. Any
     reference herein to any specific citation, section or form of law, statute,
     rule or regulation shall refer to such new, replacement or analogous
     citation, section or form should citation, section or form be modified,
     amended or replaced.

          11.  MISCELLANEOUS.

          11A.   NOTE PAYMENTS.  The Company agrees that, so long as you shall
     hold any Note, it will make payments of principal of, interest on and any
     Yield-Maintenance Amount payable with respect to such Note, which comply
     with the terms of this Agreement, by wire transfer of immediately available
     funds for credit (not later than 12:00 noon, New York City time, on the
     date due) to your account or accounts as specified in the Purchaser
     Schedule attached hereto, or such other account or accounts in the United
     States as you may designate in writing, notwithstanding any contrary
     provision herein or in any Note with respect to the place of payment.  You
     agree that, before disposing of any Note, you will make a notation thereon
     (or on a schedule attached thereto) of all principal payments previously
     made thereon and of the date to which interest thereon has been paid. Upon
     written request of the Company made concurrently with or reasonably
     promptly after payment or prepayment in full of any Note, you shall
     surrender such Note for cancellation, reasonably promptly after any such
     request, to the Company at its principal executive office.  The Company
     agrees to afford the benefits of this paragraph 11A to any Transferee which
                                           -------------                        
     shall have made the same agreement as you have made in this paragraph 11A.
                                                                 ------------- 

          11B.   EXPENSES.  The Company agrees, whether or not the transactions
     contemplated hereby shall be consummated, to pay, and save you and any
     Transferee harmless against liability for the payment of, all reasonable
     out-of-pocket costs and expenses arising in connection with such
     transactions, including:

               (i) (A) all stamp and documentary taxes and similar charges and
          (B) costs of obtaining a private placement number for the Notes in
          each case as a result of the execution and delivery of this Agreement
          or the issuance of the Notes;

                                       29

 
               (ii)  document production and duplication charges and the
          reasonable fees and expenses of any special counsel engaged by you or
          such Transferee in connection with this Agreement and the transactions
          contemplated hereby;

               (iii) the costs and expenses, including reasonable attorneys'
          fees, incurred by you or such Transferee in enforcing any rights under
          this Agreement or the Notes; and

               (iv)  any judgment, liability, claim, order, decree, cost, fee,
          expense, action or obligation resulting directly from the consummation
          of the transactions contemplated hereby, including the use of the
          proceeds of the Notes by the Company;

provided that the Company shall not be responsible for (1) any of your expenses
- --------                                                                       
or those of a Transferee incurred solely in connection with any transfer of any
Note or (2) the fees and expenses of more than one counsel for the holders of
the Notes, except to the extent the Required Holders determine that (a) either
legal advice is needed in a jurisdiction other than that specified in paragraph
                                                                      ---------
11L or (b) there exists a conflict of interest amongst the holders of the Notes.
- ---                  
The obligations of the Company under this paragraph 11B shall survive the
                                          -------------                  
transfer of any Note or portion thereof or interest therein by you or any
Transferee and the payment of any Note.

          11C. CONSENT TO AMENDMENTS.  This Agreement may be amended, and the
     Company may take any action herein prohibited, or omit to perform any act
     herein required to be performed by it, if the Company shall obtain the
     written consent to such amendment, action or omission to act, of the
     Required Holder(s); except that, (i) without the written consent of the
                         ------ ----                                        
     holder or holders of all Notes at the time outstanding, no amendment to
     this Agreement shall change the maturity of any Note, or change the
     principal of, or the rate, method of computation or time of payment of
     interest on or any Yield-Maintenance Amount payable with respect to any
     Note, or affect the time, amount or allocation of any prepayments, or
     change the proportion of the principal amount of the Notes required with
     respect to any consent, amendment, waiver or declaration, and (ii) so long
     as any BP Holder holds any Note(s), no amendment, action or omission to act
     shall amend, modify or otherwise affect such BP Party's rights under the
     Note(s) that it holds (or its rights under this Agreement to the extent
     relating to such BP Party's Note(s)) without such BP Party's written
     consent.  Each holder of any Note at the time or thereafter outstanding
     shall be bound by any consent authorized by this paragraph 11C, whether or
                                                      -------------            
     not such Note shall have been marked to indicate such consent, but any
     Notes issued thereafter may bear a notation referring to any such consent.
     No course of dealing between the Company and the holder of any Note nor any
     delay in exercising any rights hereunder or under any Note shall operate as
     a waiver of any rights of any holder of such Note.  As used herein and in
     the Notes, the term "this Agreement" and references thereto shall mean this
     Agreement as it may from time to time be amended or supplemented.

                                       30

 
          11D.  FORM, REGISTRATION, TRANSFER AND EXCHANGE OF NOTES; LOST NOTES.
     The Notes are issuable as registered notes without coupons in denominations
     of at least $1,000,000, except as may be necessary to (i) reflect any
     principal amount not evenly divisible by $1,000,000 or (ii) enable the
     registration of transfer by a holder of its entire holding of Notes.  The
     Company shall keep at its principal office a register in which the Company
     shall provide for the registration of Notes and of transfers of Notes.
     Upon surrender for registration of transfer of any Note at the principal
     office of the Company, the Company shall, at its expense, execute and
     deliver one or more new Notes of like tenor and of a like aggregate
     principal amount, registered in the name of such transferee or transferees.
     At the option of the holder of any Note, such Note may be exchanged for
     other Notes of like tenor and of any authorized denominations, of a like
     aggregate principal amount, upon surrender of the Note to be exchanged at
     the principal office of the Company.  Whenever any Notes are so surrendered
     for exchange, the Company shall, at its expense, execute and deliver the
     Notes which the holder making the exchange is entitled to receive. Every
     Note surrendered for registration of transfer or exchange shall be duly
     endorsed, or be accompanied by a written instrument of transfer duly
     executed, by the holder of such Note or such holder's attorney duly
     authorized in writing.  Any Note or Notes issued in exchange for any Note
     or upon transfer thereof shall carry the rights to unpaid interest and
     interest to accrue which were carried by the Note so exchanged or
     transferred, so that neither gain nor loss of interest shall result from
     any such transfer or exchange.  Upon receipt of written notice from the
     holder of any Note of the loss, theft, destruction or mutilation of such
     Note and, in the case of any such loss, theft or destruction, upon receipt
     of such holder's indemnity agreement (which shall be unsecured if such
     holder is an Institutional Investor whose senior debt securities are rated
     BBB- or Baa3 or better by S&P or Moody's, respectively, and, otherwise,
     which shall be unsecured unless the Company requests in writing that such
     indemnity agreement be secured), or in the case of any such mutilation upon
     surrender and cancellation of such Note, the Company will make and deliver
     a new Note, of like tenor, in lieu of the lost, stolen, destroyed or
     mutilated Note.  The Company shall give to any holder of a Note that is an
     Institutional Investor promptly upon request therefor, a complete and
     correct copy of the names and addresses of all registered holders of Notes.

          The Company may require payment of a sum sufficient to cover any stamp
     tax or governmental charge imposed in respect of any such transfer of
     Notes.

          11E.  TRANSFER OF NOTES; PERSONS DEEMED OWNERS.  Subject to the next
     succeeding sentence, you may transfer any Note or portion thereof in your
     sole discretion; provided, however, that any Transferee shall be an
     Institutional Investor. Prior to due presentment for registration of
     transfer, the Company may treat the Person in whose name any Note is
     registered as the owner and holder of such Note for the purpose of
     receiving payment of principal of, interest on and any Yield-Maintenance
     Amount payable with respect to such Note and for all other

                                       31

 
     purposes whatsoever, whether or not such Note shall be overdue, and the
     Company shall not be affected by notice to the contrary.

          11F.  SURVIVAL OF REPRESENTATIONS AND WARRANTIES; ENTIRE AGREEMENT.
     All representations and warranties contained herein or made in writing by
     or on behalf of the Company in connection herewith shall survive the
     execution and delivery of this Agreement and the Notes, the transfer by you
     of any Note or portion thereof or interest therein and the payment of any
     Note, and may be relied upon by any Transferee, regardless of any
     investigation made at any time by or on behalf of you or any Transferee.
     Subject to the preceding sentence, this Agreement and the Notes embody the
     entire agreement and understanding between you and the Company and
     supersede all prior agreements and understandings between you and the
     Company relating to the subject matter hereof, and the Company shall not be
     affected by notice to the contrary.  No provision of this Agreement shall
     be interpreted for or against any party because that party or its legal
     representative drafted the provision.

          11G.  SUCCESSORS AND ASSIGNS.  All covenants and other agreements in
     this Agreement contained by or on behalf of either of the parties hereto
     shall bind and inure to the benefit of the respective successors and
     assigns of the parties hereto (including, without limitation, any
     Transferee) whether so expressed or not.

          11H.  NOTICES.  All written communications provided for hereunder
     shall be sent by first class mail or nationwide overnight delivery service
     (with charges prepaid) and (i) if to you, addressed to you at the address
     specified for such communications in the Purchaser Schedule attached
     hereto, or at such other address as you shall have specified to the Company
     in writing, (ii) if to any other holder of any Note, addressed to such
     other holder at such address as such other holder shall have specified to
     the Company in writing or, if any such other holder shall not have so
     specified an address to the Company, then addressed to such other holder in
     care of the last holder of such Note which shall have so specified an
     address to the Company, and (iii) if to the Company, addressed to it at
     Prudential Realty Group, 8 Campus Drive, 4th Floor, Arbor Circle South,
     Parsippany, New Jersey 07054, Attention: John Triece, or at such other
     address as the Company shall have specified to the holder of each Note in
     writing; provided, however, that any such communication to the Company may
     also, at the option of the holder of any Note, be delivered by any other
     means either to the Company at its address specified above or to any
     officer of the Company.

          11I.  PAYMENTS DUE ON NON-BUSINESS DAYS.  Anything in this Agreement
     or the Notes to the contrary notwithstanding, any payment of principal of
     or interest on any Note that is due on a date other than a Business Day
     shall be made on the next succeeding Business Day.  If the date for any
     payment is extended to the next succeeding Business Day by reason of the
     preceding sentence, the period of such

                                       32

 
     extension shall be included in the computation of the interest payable on
     such Business Day.

          11J.  SATISFACTION REQUIREMENT.  If any agreement, certificate or
     other writing, or any action taken or to be taken, is by the terms of this
     Agreement required to be satisfactory to you or to the Required Holder(s),
     the determination of such satisfaction shall be made by you or the Required
     Holder(s), as the case may be, in the reasonable judgment of the Person or
     Persons making such determination.

          11K.  INDEMNIFICATION.  The Company hereby agrees to indemnify you and
     your directors, officers, employees and agents from, and hold each of them
     harmless against, any and all losses, liabilities, claims, damages and
     expenses arising out of or by reason of any investigation or litigation or
     other proceeding relating to this Agreement, the Notes or the transactions
     contemplated hereby, including, without limitation, the reasonable fees and
     disbursements of counsel incurred in connection with any such investigation
     or litigation or other proceedings (but excluding any such losses,
     liabilities, claims, damages or expenses incurred by reason of the gross
     negligence or willful misconduct of the Person to be indemnified).

          11L.  GOVERNING LAW.  This Agreement shall be construed and enforced
     in accordance with, and the rights of the parties shall be governed by, the
     law of the State of New York.

          11M.   SEVERABILITY.  Any provision of this Agreement which is
     prohibited or unenforceable in any jurisdiction shall, as to such
     jurisdiction, be ineffective to the extent of such prohibition or
     unenforceability without invalidating the remaining provisions hereof, and
     any such prohibition or unenforceability in any jurisdiction shall not
     invalidate or render unenforceable such provision in any other
     jurisdiction.

          11N.  DESCRIPTIVE HEADINGS.  The descriptive headings of the several
     paragraphs of this Agreement are inserted for convenience only and do not
     constitute a part of this Agreement.

          11O.  COUNTERPARTS.  This Agreement may be executed in any number of
     counterparts, each of which shall be an original but all of which together
     shall constitute one instrument.

                                       33

 
          If you are in agreement with the foregoing, please sign the form of
     acceptance on the enclosed counterpart of this letter and return the same
     to the Company, whereupon this letter shall become a binding agreement
     between the Company and you.



                                    Very truly yours,


                                    PRUDENTIAL REALTY
                                    SECURITIES, INC.

                                    By: /s/ Paul D. Egan
                                       -------------------------------------
                                    Name: Paul D. Egan
                                    Title: Vice President


                                    By:_____________________________________
                                    Name:___________________________________
                                    Title:__________________________________

                                      S-1

 
The forgoing Agreement is
hereby accepted as of the
date first above written

FOUR EMBARCADERO CENTER VENTURE,
a California General Partnership

By:  BOSTON PROPERTIES LLC,
     as Managing General Partner

     By:  BOSTON PROPERTIES LIMITED
          PARTNERSHIP, as Manager

          By:  BOSTON PROPERTIES, INC.,
               as General Partner



               By: /s/ Thomas J. O'Connor
                  -------------------------
               Name: Thomas J. O'Connor
               Title: Vice President

                                      S-2

 
                                   EXHIBIT A
                                   ---------

                                [FORM OF NOTES]

                      PRUDENTIAL REALTY SECURITIES, INC.

                       SENIOR NOTE DUE __________, 200_


No. _____                                                     [Date]
$________


     FOR VALUE RECEIVED, the undersigned, PRUDENTIAL REALTY SECURITIES, INC.
(the "COMPANY"), a corporation organized and existing under the laws of the
State of Delaware, hereby promises to pay to FOUR EMBARCADERO CENTER VENTURE, a
California general partnership, or registered assigns, the principal sum of
___________________________ DOLLARS ($______________) on _____________, ____
(the "Maturity Date"), with interest (computed on the basis of a 360-day year
comprised of 12 30-day months) on the unpaid balance thereof at the rate of
____% per annum from the date hereof through and including _______, ___ (the
"RATE RESET DATE") and thereafter through and including the Maturity Date, at a
rate of interest per annum equal to the sum of (i) ________ basis points, and
(ii) the Reset Treasury, as defined in the Note Agreement.  All such interest
shall be payable semiannually on the 15/th/ day of June and December in each
year, commencing with the first such date next succeeding the date hereof, until
the principal hereof shall have become due and payable, and shall be payable on
any overdue payment (including any overdue prepayment) of principal, any overdue
payment of interest and any overdue payment of any Yield-Maintenance Amount (as
defined in the Note Agreement), payable semiannually as aforesaid (or, at the
option of the registered holder hereof, on demand), at a rate per annum from
time to time equal to the lesser of (a) the maximum rate permitted by applicable
law and (b) 2.0% over the interest rate then in effect under this Note in
accordance with the foregoing terms and provisions.

     Payments of principal of, interest on and any Yield-Maintenance Amount
payable with respect to this Note are to be made in immediately available funds,
in lawful money of the United States of America, by wire transfer to [_______]
at [NAME OF BANK] in [New York City], ABA #________, Account # __________, or to
such other account or place as the registered holder hereof shall designate to
the Company in writing.

     This Note is one of a series of Senior Notes (the "NOTES") issued pursuant
to a Note Agreement, dated as of November 12, 1998 (the "NOTE AGREEMENT"),
between the Company and One Embarcadero Center Venture and is entitled to the
benefits thereof.

     This Note is a registered Note and, as provided in the Note Agreement, upon
surrender of this Note for registration of transfer, duly endorsed, or
accompanied by a written

                                      A-1

 
instrument of transfer duly executed, by the registered holder hereof or such
holder's attorney duly authorized in writing, a new Note for a like principal
amount will be issued to, and registered in the name of, the transferee. Prior
to due presentment for registration of transfer, the Company may treat the
person in whose name this Note is registered as the owner hereof for the purpose
of receiving payment and for all other purposes, and the Company shall not be
affected by any notice to the contrary.

     This Note is subject to optional prepayment, in whole or from time to time
in part, on the terms specified in the Note Agreement.

     If an Event of Default, as defined in the Note Agreement, shall occur and
be continuing, the principal of this Note may be declared or otherwise become
due and payable in the manner and with the effect provided in the Note
Agreement.

     The Company and any and all endorsers, guarantors and sureties severally
waive grace, demand, presentment for payment, notice of dishonor or default,
notice of intent to accelerate, notice of acceleration (to the extent set forth
in the Note Agreement), protest and diligence in collecting.

     THIS NOTE IS INTENDED TO BE PERFORMED IN THE STATE OF NEW YORK AND SHALL BE
CONSTRUED AND ENFORCED IN ACCORDANCE WITH THE LAW OF SUCH STATE.

                              PRUDENTIAL REALTY SECURITIES, INC.



                              By_________________________
                                    [Vice] President


                              By_________________________
                                    Treasurer

                                      A-2

 
                                   EXHIBIT C
                                   ---------

                             INVESTMENT GUIDELINES
                             ---------------------


1.   Invest only in investment grade fixed income assets that:

a)   are current in payment and not in default (subject to cure periods):

b)   minimally provide for interest payments which are (i) monthly in the case
of "non securities" investments (i.e., whole mortgage loans) or (ii) semi-
annually in the case of "securities" investments (i.e., ABS):

c)   have a maturity date which is at least thirty months beyond the asset
purchase date:

d)   include prepayment premiums providing for yield maintenance or the
substantial equivalent: and

e)   on an individual basis, do not exceed 7% of the total portfolio.



2.   Make more than 80% of all investment in assets directly secured by first
mortgages. In addition: (a) no such assets may have a "loan to value" ratio
which exceeds 80%, and at least 90% of such assets shall have a "loan to value"
ratio which is 75% or less and (b) the overall portfolio of such assets shall be
geographically diverse.



 
                                                                   EXHIBIT 99.15

                             REDEMPTION AGREEMENT


          THIS REDEMPTION AGREEMENT (this "AGREEMENT") dated as of November 12,
1998, is made and entered into by and among ONE EMBARCADERO CENTER VENTURE, a
California general partnership ("PARTNERSHIP"), BOSTON PROPERTIES LLC, a
Delaware limited liability company ("BPLLC"), BP EC1 HOLDINGS LLC, a Delaware
limited liability company ("HOLDINGS LLC"), and PIC REALTY CORPORATION, a
Delaware corporation ("PIC").


                                R E C I T A L S
                                - - - - - - - -

          A.   Pursuant to that certain Master Transaction Agreement dated as of
September 28, 1998, by and among Boston Properties Limited Partnership, Boston
Properties, Inc., The Prudential Insurance Company of America, PIC, Fedmark
Corporation, Embarcadero Center Investors Partnership, Pacific Property
Services, L.P. and certain other persons listed on Exhibit A thereto (the
"MASTER TRANSACTION AGREEMENT"), BPLLC, Holdings LLC and PIC have become the
sole partners of the Partnership, which Partnership is currently governed by
that certain Third Amended and Restated Partnership Agreement of One Embarcadero
Center Venture of even date herewith (the "PARTNERSHIP AGREEMENT").  All
capitalized terms used herein without definition shall have the respective
meanings given such terms in the Partnership Agreement.

          B.   PIC desires to acquire the right to have its entire interest in
and to the Partnership (the "PIC INTEREST") redeemed by the Partnership at any
time from and after the date hereof in accordance with the terms and provisions
of this Agreement below, and BPLLC and Holdings LLC desire to acquire the right
to cause the PIC Interest to be redeemed by the Partnership at any time after
the date which is ninety (90) days after the date hereof in accordance with the
terms and provisions of this Agreement below, all as hereinafter provided.

          C.   In connection with the redemption transactions described in
Recital B above, the parties hereto desire to make certain additional covenants
- ---------                                                                      
and agreements as hereinafter set forth.

          NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged by the parties hereto, the parties
hereby agree as follows:

          1.   REDEMPTION EVENT.
               ---------------- 

          (A) The PIC Interest shall be fully redeemed by the Partnership in the
manner provided in Section 2 below in the event that a PIC Redemption Notice is
                   ---------                                                   
duly given to BPLLC or any other Person who is then the managing partner of the
Partnership (the "MANAGING 

                                       1

 
PARTNER") in accordance with subsection (b) below or a Partnership Redemption
                             --------------                   
Notice is duly given to PIC by BPLLC or Holdings LLC (on behalf of the
Partnership) in accordance with subsection (c) below.
                                --------------       

          (B) At any time after the date hereof, PIC may elect to have the PIC
Interest fully redeemed by the Partnership in accordance with Section 2 below by
                                                              ---------         
giving written notice (a "PIC REDEMPTION NOTICE") to the Managing Partner
stating that PIC is electing to have the PIC Interest fully redeemed pursuant to
this Agreement; provided that, notwithstanding the foregoing, PIC's right to
                -------- ----                                               
give a PIC Redemption Notice and to be redeemed at its election shall be
suspended during any period of time while there exists an Investment Loan
Borrower Credit Event (as defined in Exhibit A attached hereto).  A PIC
                                     ---------                         
Redemption Notice shall only be effective if simultaneously with the giving of
such notice (x) PIC delivers a similar notice with respect to the Redemption
Agreement of even date herewith to which PIC and Embarcadero Center Associates
are parties, (y) The Prudential Insurance Company of America delivers a similar
notice with respect to the Redemption Agreements of even date herewith to which
it is a party with Three Embarcadero Center Venture and Four Embarcadero Center
Venture, respectively (such similar notices of PIC and Prudential, the
"CORRESPONDING NOTICES"), and (z) each Corresponding Notice specifies the same
Redemption Date as is specified in the PIC Redemption Notice.

          (C) At any time on or after the date which is five (5) business days
prior to the date which is ninety (90) days after the date hereof (i.e., such
                                                                   ----      
that the Redemption Date selected by BPLLC or Holdings LLC shall not occur prior
to the date which is ninety (90) days after the date hereof), either BPLLC or
Holdings LLC may elect to have the Partnership fully redeem the PIC Interest in
accordance with Section 2 below by giving written notice (the "PARTNERSHIP
                ---------                                                 
REDEMPTION NOTICE") to PIC stating that the Partnership is electing to have the
PIC Interest fully redeemed pursuant to this Agreement; provided that,
                                                        -------- ---- 
notwithstanding the foregoing, BPLLC's and Holding LLC's right to give a
Partnership Redemption Notice and to cause the Partnership to redeem the PIC
Interest at either of their elections shall be suspended during any period of
time while any of the Investment Notes have been accelerated and such
acceleration has not been rescinded by the holder(s) of such Investment Notes.

          (D) As used herein, the following terms shall have the following
meanings:

          "AMORTIZED LEASING COSTS" shall mean, for any period, the sum of the
amortized portion of all Investor Leasing Costs (as defined in the Master
Transaction Agreement) and New Leasing Costs for such period, it being
acknowledged and agreed that all such Investor Leasing Costs and New Leasing
Costs shall be amortized on a straight-line basis monthly over the base term of
the applicable lease commencing on the rent commencement date for such lease,
plus interest on the unamortized portion of all Investor Leasing Costs and New
- ----                                                                          
Leasing Costs outstanding from time to time during such period at the rate of
ten percent (10%) per annum.

          "BROKEN LIBOR COST" shall mean the extra payment which the Partnership
must make on account of repaying the Equity Redemption Loan on a date other than
the end of an 

                                       2

 
"interest period" because the Redemption Date falls on a date other than the end
of an "interest period" (it being acknowledged and agreed by the parties hereto
that, if the Redemption Date falls on a date which is the end of an "interest
period", there shall be no Broken LIBOR Cost for purposes of this Agreement).
The Managing Partner shall, at the request of PIC, provide PIC with a schedule
showing the end of all "interest periods" for purposes of timing the Redemption
Distribution and PIC may rely on such schedule for purposes of designating a
Redemption Date.

          "FAIR MARKET VALUE OF THE INVESTMENT NOTES" shall be determined
pursuant to and in accordance with the terms and provisions of Exhibit A
                                                               ---------
attached hereto.

          "FAIR MARKET VALUE OF THE PIC INTEREST" shall equal, on the Redemption
Date, the sum of $75,168,203 (which amount equals PIC's Percentage Interest
immediately prior to the Redemption Distribution multiplied by the NMV (defined
in the Master Transaction Agreement) of the Property as of the date hereof,
adjusted to:

          (i)   add an amount equal to the product of PIC's Percentage Interest
                ---                                                            
     immediately prior to the Redemption Distribution, multiplied by any
                                                       ---------- --    
     Unrealized Gain (defined below), if any, on the Investment Notes as of the
     Determination Date (described in Exhibit A attached hereto) or deduct an
                                      ---------                     ------   
     amount equal to the product of PIC's Percentage Interest immediately prior
     to the Redemption Distribution, multiplied by any Unrealized Loss (defined
                                     ---------- --                             
     below), if any, on the Investment Notes as of the Determination Date;

          (ii)  deduct all distributions (other than the Redemption Distribution
                ------                                                          
     and any distribution of OP Units) actually made by the Partnership to (and
     received by) PIC from and after the date hereof through and including the
     Redemption Date;

          (iii) add any Capital Contributions made by PIC from and after the
                ---                                                         
     date hereof through and including the Redemption Date;

          (iv)  add an amount equal to the product of PIC's Percentage Interest
                ---                                                            
     immediately prior to the Redemption Distribution, multiplied by the
                                                       ---------- --    
     estimated Operating Profits, if any, for the period from and after the date
     hereof through and including the Redemption Date or deduct an amount equal
                                                         ------                
     to PIC's Percentage Interest immediately prior to the Redemption
     Distribution, multiplied by the estimated Operating Losses, if any, for the
                   ---------- --                                                
     period from and after the date hereof through and including the Redemption
     Date;

          (v)   deduct an amount equal to the unamortized portion of all
                ------                                                  
     Interest Rate Approved Loan Costs with respect to the Prudential Guarantied
     Loan (which Prudential Guarantied Loan will be assumed by PIC in connection
     with the Redemption Distribution);

          (vi)  add an amount equal to the product of (x) $1,000, multiplied by
                ---                                               ---------- --
     (y) the number of days from and including the date hereof and through and
     including the Redemption Date;

                                       3

 
          (vii)   add an amount equal to PIC's Percentage Interest in the
                  ---                                                    
     Partnership immediately prior to the Redemption Distribution multiplied by
     all cash distributions or cash proceeds ("MTA PROCEEDS") actually received
     by the Partnership from Two Embarcadero Center West and Three Embarcadero
     Center West from and after the date hereof; and

          (viii)  subtract an amount equal to the Broken Libor Cost (if any);
                  --------                                                   
     and

          (ix)    add an amount equal to the difference between the NEV (as
                  ---
     defined in the Master Transaction Agreement) of the Property minus the NMV
     of the Property (if such difference is a positive number) or subtract an
                                                                  --------
     amount equal to the difference between the NMV of the Property minus the
     NEV of the Property (if the difference is a positive number); provided
                                                                   --------
     that, if, as of the Redemption Date, the Adjusted NEV (as defined in the
     ----
     Master Transaction Agreement) shall have been determined in accordance with
     Exhibit V of the Master Transaction Agreement, then in lieu of the
     adjustment provided for in this clause (ix) above, an adjustment shall be
                                     -----------                              
     made to add an amount equal to the Revised NEV (defined immediately below)
             ---                                                               
     of the Property minus the NMV of the Property (if such difference is a
     positive number) or subtract an amount equal to the NMV of the Property
                         --------                                           
     minus the Revised NEV of the Property (if such difference is a positive
     number).  As used herein, the "REVISED NEV OF THE PROPERTY" shall mean an
     amount equal to the sum of the NEV of the Property plus or minus, as the
     case may be, the adjustment made to the NEV pursuant to Section V-9-1 of
     Exhibit V to the Master Transaction Agreement.

For purposes of determining estimated Operating Profits or Operating Losses
hereunder, the Managing Partner shall provide PIC with its calculation of
estimated Operating Profits or Operating Losses prior to the Redemption
Distribution, which calculation shall be subject to PIC's approval (not to be
unreasonably withheld or delayed), and the Partnership and PIC shall thereafter
make any necessary adjustments to said calculation as complete information
becomes available within thirty (30) days after the Redemption Date in
accordance with the terms and provisions of Section 2(e) below.
                                            ------------       

          "LEASING COSTS" shall mean any and all (i) tenant improvement
allowances, move-in allowances, brokerage commissions, expenses incurred or to
be incurred for repairs, improvements, equipment, painting, decorating,
partitioning and other items to satisfy the tenant's requirements for the
commencement of the applicable lease, (ii) the cost of removal and/or abatement
of asbestos or other hazards or toxic substances located in the demised space in
violation of law and as required in order to satisfy the tenant's requirements
for the commencement of the applicable lease, (iii) rent concessions as stated
in the respective lease (and applicable lease documents) relating to the demised
space provided the tenant has the right to take possession of such demised space
during the period of such rent concessions, (iv) base building modifications
required by the applicable lease, and (v) expenses incurred or to be incurred
for the purpose of satisfying or terminating the obligations of a tenant to the
landlord under another lease.

                                       4

 
          "OP UNITS" shall mean a number of Series Three Preferred Units in
Boston Properties Limited Partnership equal to the product of (i) PIC's
Percentage Interest in the Partnership immediately prior to the "Closing" under
the Master Transaction Agreement, multiplied by (ii) the total number of Series
                                  ---------- --                                
Three Preferred Units in Boston Properties Limited Partnership actually received
by the Partnership from Two Embarcadero Center West and Three Embarcadero Center
West.

          "NEW LEASING COSTS" shall mean all Leasing Costs incurred by the
Partnership in connection with any new Leases executed after the date hereof and
prior to the Redemption Date.

          "OPERATING ASSETS" shall mean all real property, improvements, leases,
licenses, fixtures and tangible and intangible personal property owned by the
Partnership on the date hereof other than cash, deposit accounts and money.

          For any period, "OPERATING PROFITS" shall mean the absolute value of
the following amount (if positive) and "OPERATING LOSSES" shall mean the
absolute value of the following amount (if negative): net income (loss) of the
Partnership for such period determined in accordance with GAAP without giving
effect to extraordinary gains (or losses) or any taxes on or measured by such
net income or loss, plus the sum of (i) all amortization and depreciation
                    ----                                                 
expense and other non-cash expenses (it being acknowledged by the parties hereto
that principal payments on account of debt and capital expenditures other than
those amortized during any period for which net income (loss) is being
determined are not taken into account or deducted when calculating net income
(loss) under GAAP), (ii) all Leasing Costs that are not treated as capital
expenditures under GAAP, (iii) all interest expense of the Partnership on loans
made by any BP Partner under the Partnership Agreement (which loans are
evidenced by a BP Note) and (iv) all fees, costs and expenses (other than
interest expense) incurred by the Partnership or any Partner in connection with
any Partnership loan which were deducted as an expense (rather than amortized)
other than non-amortizable fees, costs and expenses for Approved Loan Costs and
non-amortizable Excess Proceeds Borrowing Costs, minus the Amortized Leasing
                                                 -----                      
Costs for such period and the amortized portion of the Approved Loan Costs and
the Excess Proceeds Borrowing Costs for such period. Operating Profits and
Losses for any partial month shall be prorated on the basis of the actual number
of days of such month and a 365-day year.

          "REDEMPTION AMOUNT" shall equal (i) the Fair Market Value of the PIC
Interest on the Redemption Date, plus (ii) the outstanding principal balance of
                                 ----                                          
the Prudential Guarantied Loan assumed by PIC on the Redemption Date in
connection with the distribution of the Investment Notes to PIC, together with
all accrued but unpaid interest on the Prudential Guarantied Loan as of such
date.

          "REDEMPTION DATE" shall mean the earlier of (x) the date specified in
a PIC Redemption Notice given by PIC to the Managing Partner (provided that such
                                                              -------- ----     
date shall be at least five (5) business days after the giving of such PIC
Redemption Notice), and (y) the date specified in a Partnership Redemption
Notice given by BPLLC or Holdings LLC to PIC (provided that such
                                              -------- ----


                                       5

 
date shall be at least five (5) business days after the giving of such
Partnership Redemption Notice).

          "UNREALIZED GAIN" shall mean the excess (if any) of (x) the aggregate
Fair Market Value of all Investment Notes (provided that, in calculating the
Fair Market Value of the Investment Notes for purposes of determining Unrealized
Gain, the accrued and unpaid interest thereunder as of the Redemption Date shall
not be added to the Remaining Cash Flow), minus (y) the aggregate face amounts
                                          -----                               
of all Investment Notes.

          "UNREALIZED LOSS" shall mean the excess (if any) of (A) the aggregate
face amounts of all Investment Notes minus (B) the aggregate Fair Market Value
                                     -----                                    
of all Investment Notes (provided that, in calculating the Fair Market Value of
the Investment Notes for purposes of determining Unrealized Loss, the accrued
and unpaid interest thereunder as of the Redemption Date shall not be added to
the Remaining Cash Flow).

          2.   REDEMPTION DISTRIBUTION.
               ----------------------- 

          (A) On the Redemption Date the Partnership shall distribute to PIC, as
a "REDEMPTION DISTRIBUTION" in full redemption of the PIC Interest, (i) the
Partnership's entire right, title and interest in, to and under the Investment
Notes (subject to the Prudential Guarantied Loan) and all rights in, to and
under the other instruments and agreements relating to the Investment Loan
(collectively, the "INVESTMENT LOAN DOCUMENTS") (provided that, the Partnership
                                                 -------- ----                 
shall retain all claims, rights, obligations and liabilities under the
Investment Loan Documents accruing prior to the Redemption Date (except the
right to any accrued and unpaid interest under the Investment Notes distributed
to PIC as of the Redemption Date, which shall be paid to PIC after the
Redemption Date and which is included and accounted for in the calculation of
the Fair Market Value of the Investment Notes pursuant to Exhibit A attached
                                                          ---------         
hereto), and if the Partnership retains any Remainder Notes pursuant to the
provisions of this Section 2(a) below, the Partnership shall retain all rights,
                   ------------                                                
obligations and liabilities under the Investment Loan Documents relating to such
Remainder Notes, if any, retained by the Partnership (both accruing prior to and
after the Redemption Date), (ii) if the Redemption Amount exceeds the aggregate
Fair Market Value of the Investment Notes, cash in an amount equal to the
difference between the Redemption Amount and the aggregate Fair Market Value of
the Investment Notes, and (iii) if and to the extent that the Partnership has
not already distributed to PIC the OP Units, the OP Units. Notwithstanding the
foregoing, if the aggregate Fair Market Value of all Investment Notes on the
Redemption Date exceeds the Redemption Amount on such date, then (A) on the
Redemption Date the Partnership shall assign to PIC its entire interest in only
such Investment Notes (in the order provided in the next sentence) that
collectively have an aggregate Fair Market Value at the time of such assignment
equal to the Redemption Amount, and (B) the Partnership shall cause any
individual Investment Note which is only partially assigned to PIC in accordance
with the next sentence to be replaced by the issuer thereof with two notes in
accordance with the terms and provisions of the next sentence.  In connection
with the distribution of Investment Notes pursuant to the immediately preceding
sentence, the Partnership shall distribute to PIC those Investment 

                                       6

 
Notes with the latest maturity dates one by one beginning with the Investment
Note with the latest maturity date and then the Investment Note with the next
latest maturity date and so forth until the total Fair Market Value of all
Investment Notes distributed to PIC equals the Redemption Amount; provided that,
                                                                  -------- ----
if necessary in order to distribute to PIC Investment Notes with a Fair Market
Value exactly equal to the Redemption Amount, the last Investment Note to be
distributed will be divided into two notes collectively having an aggregate
principal amount equal to such original Investment Note and otherwise having
identical terms, so that one of such notes (when taken together with the other
Investment Notes distributed to PIC in accordance with the order of priority set
forth hereinabove) will have a Fair Market Value equal to the Redemption Amount
and such note shall be assigned to PIC by the Partnership. If less than all of
the Investment Notes are assigned to PIC in connection with the Redemption
Distribution as provided above, the Investment Note(s) retained by the
Partnership shall be collectively referred to herein as the "REMAINDER NOTES".

          (B) Concurrently with the Redemption Distribution, the Partnership
shall execute and deliver to PIC an Investment Loan Certificate in the form of
Exhibit B attached hereto without modification.
- ---------                                      

          (C) Concurrently with the Redemption Distribution, the Partnership
shall assign to PIC, and PIC shall accept and assume, the Prudential Guarantied
Loan and all instruments and agreements relating thereto, and PIC shall
thereafter be subject to all claims, rights, obligations and liabilities
thereunder accruing from and after the Redemption Date (except that PIC shall
also assume and be subject to the obligation to pay all accrued but unpaid
interest under such Prudential Guarantied Loan as of and including the
Redemption Date to the extent the same has not yet become due and payable under
the Prudential Guarantied Loan Documents); and the lender under such documents
shall release the Partnership, in a writing delivered to the Partnership, from
all claims, rights, obligations and liabilities thereunder accruing from and
after the Redemption Date and from the obligation to pay any accrued and unpaid
interest under such Prudential Guarantied Loan as of and including the
Redemption Date to the extent such interest payment has not yet become due and
payable under the Prudential Guarantied Loan Documents.

          (D) It shall be a condition precedent to the consummation of the
transactions described in subsections (a), (b) and (c) above that all occur
                          ---------------  ---     ---                     
simultaneously.

          (E) Within thirty (30) days after the end of the calendar month in
which the Redemption Date occurs, the Partnership and PIC shall obtain all
necessary and complete information regarding the Operating Profits or Operating
Losses of the Partnership accruing from the date hereof through and including
the Redemption Date and shall agree upon and make any necessary adjustments to
the estimated Operating Profits or Operating Losses of the Partnership which
were utilized in calculating the Fair Market Value of the PIC Interest on the
Redemption Date.  If, after making such adjustments, the actual Operating
Profits of the Partnership are greater than the estimated Operating Profits
utilized to determine the Fair Market Value of the PIC Interest on the
Redemption Date, or the actual Operating Losses are less than the estimated
Operating Losses, as the case may be, then the Partnership shall promptly make a
cash payment 

                                       7

 
to PIC equal to the difference. If, after making such adjustments, the actual
Operating Profits of the Partnership are less than the estimated Operating
Profits utilized to determine the Fair Market Value of the PIC Interest on the
Redemption Date, or the actual Operating Losses are greater than the estimated
Operating Losses, as the case may be, then PIC shall promptly make a cash
payment to the Partnership equal to the difference. In addition to the
foregoing, if the Adjusted NEV of the Property has not been determined pursuant
to Exhibit V of the Master Transaction Agreement as of the Redemption Date, then
promptly following such determination of Adjusted NEV of the Property, if any,
pursuant to said Exhibit V, if the Revised NEV of the Property exceeds the NEV
of the Property, the Partnership shall pay to PIC, in cash, a sum equal to such
difference, and if the NEV of the Property exceeds the Revised NEV of the
Property, then PIC shall pay to the Partnership, in cash, a sum equal to such
difference.

          3.   COVENANTS; INDEMNITIES.
               ---------------------- 

          (A)  BPLLC, Holdings LLC, PIC and the Partnership (on behalf of
themselves and their respective successors and assigns) each hereby covenants
and agrees with each other that, during the period of time from the date hereof
through and including the second (2nd) anniversary of the Redemption Date, (i)
none of the Equity Redemption Loan obtained by the Partnership on the date
hereof pursuant to the terms of the Partnership Agreement or any debt replacing
any such Equity Redemption Loan in accordance with the terms and provisions of
the Partnership Agreement, shall be repaid by any Capital Contributions made by
any Partner of the Partnership, (ii) the Partnership shall at all times maintain
and continue its existence as a general partnership under the laws of the State
of California and shall not be dissolved, wound-up or terminated during such
period of time, and (iii) except as otherwise expressly provided in this
Agreement, the Partnership shall not distribute all or any portion of its
Operating Assets to any Partner.  Each of the afore-mentioned Persons (on behalf
of themselves and their Affiliates) hereby covenants not to commit any act in
violation of this covenant (or to permit any successor or assign of any such
Person to commit any such act).

          (B)  In addition to, and not in limitation of, any other rights and
remedies available to the parties hereto under this Agreement or at law or in
equity, each party hereto (on behalf of itself) agrees that, in the event of a
breach by any party or its Affiliate (such party, the "breaching party") of any
of the covenants set forth in subsection (a) above, such breaching party shall
                              --------------                                  
indemnify, protect, defend and hold harmless the other party(ies) from and
against any and all claims, causes of action, losses, liabilities, damages,
costs and expenses of whatsoever kind or nature (including, without limitation,
reasonable attorneys' fees and expenses and any adverse income tax consequences,
including, but not limited to, any interest and penalties) arising out of or in
any way resulting from or directly relating to such breach.

          4.   TAX MATTERS.
               ----------- 

          (A)  If the PIC Interest is redeemed as contemplated by this Agreement
and the Internal Revenue Service ("IRS") subsequently questions, or determines
that it will examine, 

                                       8

 
investigate or audit any federal income tax returns filed by the Partnership in
respect of any taxable year of the Partnership ending in the calendar year in
which the Redemption Distribution occurred (the "SUBJECT RETURNS"), then (i) the
then Partners of the Partnership shall cause the Partnership to promptly furnish
PIC with copies of all written notices received from the IRS, and (ii) PIC shall
have the right, at its expense, to represent the Partnership (with professionals
of its choice) in dealing with the IRS in connection with any such questions,
examination, investigation or audit and in connection with any judicial or
administrative proceedings related thereto, in each case only to the extent that
they involve any items ("PIC ITEMS") which could have a material impact on PIC,
and to make decisions regarding or relating to all PIC Items, except that PIC
shall not make any decisions which could materially adversely impact BPLLC
and/or Holdings LLC without the prior written consent of BPLLC and Holdings LLC.
Each of BPLLC and Holdings LLC agrees (on behalf of itself and its successors
and assigns) that neither it nor the Partnership will settle with the IRS with
respect to any PIC Item without the prior written consent of PIC, which consent
will not be unreasonably withheld.

          (B) BPLLC and Holdings LLC shall cause the Partnership to, and the
Partnership shall, report the redemption of the PIC Interest pursuant to this
Agreement in a manner consistent with the characterization of such transaction
herein, that is, as a withdrawal of PIC from the Partnership and the redemption
by the Partnership of the PIC Interest in exchange for the distribution of
Partnership property in liquidation of the PIC Interest.  BPLLC and Holdings LLC
shall submit all Subject Returns to PIC for review and approval no later than
thirty (30) days prior to the filing thereof, whether or not PIC is still then a
Partner.  BPLLC and Holdings LLC agree to modify the reporting of the redemption
by the Partnership of the PIC Interest to the satisfaction of PIC to the extent
reasonably requested by PIC in writing within thirty (30) days of the receipt of
any such returns; provided that, such modification does not materially adversely
                  -------- ----                                                 
impact BPLLC and/or Holdings LLC or their Affiliates.  Notwithstanding the
redemption of the PIC Interest prior to the end of any particular calendar year,
BPLLC and Holdings LLC shall each report their participation in the Partnership
with respect to any years ending in the calendar year in which the Redemption
Distribution occurs consistent with the tax returns approved pursuant hereto and
consistent with this Agreement.

          (C) In accordance with Treasury Regulation Section 1.706-1(c)(ii), for
the taxable year of the Partnership in which the Redemption Distribution occurs,
PIC's distributive share of the items described in Section 702(a) of the
Internal Revenue Code of 1986, as amended, will be determined by reference to an
interim closing of the books.  In accordance with Treasury Regulation Section
1.751-1(c)(4)(iii), the Partnership, BPLLC, Holdings LLC, and PIC agree that, on
the Redemption Date, the fair market value of the Partnership's Section 1245
property (as defined in Section 1245(a)(3) of the Internal Revenue Code of 1986,
as amended) is equal to the adjusted tax basis of such property.

          5.   APPOINTMENT OF SUB-MANAGING PARTNER.  Notwithstanding anything to
               -----------------------------------                              
the contrary stated in the Partnership Agreement, in the event that the
Partnership fails to make the Redemption Distribution to PIC as required by
Sections 1 and 2 above on the Redemption Date, 
- ----------     -                                                             

                                       9

 
then PIC shall have the right, exercisable by written notice to the other
Partners of the Partnership, to appoint itself as the sub-managing partner
solely for the purpose of making the Redemption Distribution. In such event, PIC
shall be solely authorized and empowered, and its sole responsibility shall be,
to make the Redemption Distribution on, or as soon as practicable after, the
Redemption Date. The Managing Partner shall continue to act as the managing
partner under the Partnership Agreement during such time and shall fully and
faithfully discharge all obligations and duties of the managing partner under
the Partnership Agreement other than those pertaining to the Redemption
Distribution (which will be performed and discharged by PIC on behalf of the
Partnership). Immediately after the Redemption Distribution shall have been
accomplished, PIC shall resign as sub managing partner of the Partnership. Each
party hereto further appoints PIC as the attorney-in-fact of the Partnership to
prepare, sign, file and record any instruments, agreements or other documents,
and to take any other action deemed necessary, useful or desirable by PIC in
order to make the Redemption Distribution pursuant to this Agreement in the
event that the Managing Partner of the Partnership or the Partnership fails to
timely discharge its obligations hereunder within the time periods set forth
herein.

          6.   REMEDIES.  Any party hereto shall have the right to initiate an
               --------                                                       
action for specific performance with respect to any breach or default of this
Agreement by, or to enforce any obligation under this Agreement of, any other
party hereto (including, without limitation, the obligation of the Partnership
and the Managing Partner to make the Redemption Distribution pursuant hereto),
it being acknowledged and agreed by the parties hereto that monetary damages
would be an inadequate remedy and would not adequately compensate any non-
defaulting party. In addition to the remedy of specific performance, any non-
breaching party may initiate an action seeking actual damages (including,
without limitation, increased income tax liability which may result from such
breach).  Notwithstanding anything to the contrary stated herein, in the Master
Transaction Agreement or in the "Transaction Documents" described in such Master
Transaction Agreement, the limitations of liability set forth in Article 12 of
the Master Transaction Agreement and/or in any other Transaction Document shall
not apply to this Agreement, nor shall such limitations limit or restrict any
right or remedy available to any party hereunder as a result of the breach or
default of any other party under this Agreement.

          7.   NOTICES.  All notices, elections, consents, approvals, demands,
               -------                                                        
objections, requests or other communications which any party hereto may be
required or desire to give to any other party hereto must be in writing and sent
by (i) first class U.S. certified or registered mail, return receipt requested,
with postage prepaid, (ii) telecopy or facsimile (with a copy sent by first
class U.S. certified or registered mail, return receipt requested, with postage
prepaid), or (iii) express mail or a nationally recognized courier (for next
business day delivery).  For purposes of this Agreement, the addresses of the
parties hereto shall be as provided below:

     BPLLC, Holdings LLC
     or the Partnership:            Boston Properties, Inc.
                                    8 Arlington Street
                                    Boston, Massachusetts 02116-3495

                                       10

 
                                    Attn:  General Counsel
                                    Fax:   (617) 421-1555

          with a copy to:           Goulston & Storrs, P.C.
                                    400 Atlantic Avenue
                                    Boston, Massachusetts 02110-3333
                                    Attn:  Eli Rubenstein, Esq.
                                    Fax:   (617) 574-4112

     PIC or the Partnership:        Prudential Realty Group
                                    8 Campus Drive
                                    4th Floor - Arbor Circle South
                                    Parsippany, New Jersey 07054
                                    Attn:  John R. Triece
                                    Fax:   (201) 683-1797

          with a copy to:           Prudential Insurance Company
                                    of America
                                    Four Embarcadero Center
                                    Suite 2700
                                    San Francisco, California 94111
                                    Attn:  Harry Mixon, Esq.
                                    Fax:   (415) 956-2197

          and a copy to:            O'Melveny & Myers LLP
                                    Embarcadero Center West
                                    275 Battery Street
                                    San Francisco, California 94111
                                    Attn:  Stephen A. Cowan, Esq.
                                    Fax:   (415) 984-8701

Notwithstanding the foregoing, any party may designate another addressee or
change its address for notices and other communications hereunder by a notice
given to the other parties in the manner provided hereinabove.  A notice or
other communication sent in compliance with the provisions of this Section 7
                                                                   ---------
shall be deemed given and received on (a) the third (3rd) day following the date
it is deposited in the U.S. mail, (b) the date of confirmed dispatch if sent by
facsimile or telecopy (provided that a copy thereof is sent by mail in the
manner provided in clause (i) above), or (c) the date it is delivered to the
                   ----------                                               
other party if sent by express mail or courier.

          8.   ATTORNEYS' FEES.  If any action is brought by any party hereto
               ---------------                                               
against another party, relating to or arising out of this Agreement, any of the
transactions contemplated hereby or the enforcement hereof, the prevailing
party(ies) shall be entitled to recover from the other party(ies) reasonable
attorneys' fees and costs incurred in connection with the prosecution 

                                       11

 
or defense of such action. For purposes of this Agreement, the term "ATTORNEYS'
FEES" or "ATTORNEYS' FEES AND COSTS" shall mean the fees and expenses of counsel
to the parties hereto, which may include printing, photostating, duplicating and
other expenses, air freight charges, and fees billed for law clerks, paralegals
and other persons not admitted to the bar but performing services under the
supervision of an attorney, and the costs and fees incurred in connection with
the enforcement or collection of any judgment obtained in any such proceeding.
The provisions of this Section 8 shall survive the Redemption Distribution and
                       ---------                                              
the entry of any judgment, and shall not merge, or be deemed to have merged,
into any judgment.

          9.   SURVIVAL.  This Agreement and the obligations of the parties
               --------                                                    
hereto shall survive the redemption of the PIC Interest.

          10.  SUCCESSORS.  This Agreement and all the terms and provisions
               ----------                                                  
hereof shall be binding upon and shall inure to the benefit of all parties
hereto, and their legal representatives, successors and permitted assigns,
except as expressly herein otherwise provided.

          11.  EFFECT AND INTERPRETATION.  This Agreement shall be governed by
               -------------------------                                      
and construed in conformity with the laws of the State of California.

          12.  COUNTERPARTS.  This Agreement may be executed in any number of
               ------------                                                  
counterparts, each of which shall be deemed an original, but all of which when
taken together shall constitute one and the same instrument.  The signature page
of any counterpart may be detached therefrom without impairing the legal effect
of the signature(s) thereon provided such signature page is attached to any
other counterpart identical thereto except having additional signature pages
executed by other parties to this Agreement attached thereto.

          13.  AMENDMENTS.  Except as otherwise provided herein, this Agreement
               ----------                                                      
may not be changed, modified, supplemented or terminated, except by an
instrument in writing executed by the party(ies) hereto which is/are or will be
affected by the terms of such change, modification, supplement or termination,
or executed by the party(ies) authorized to act on behalf of the party(ies) so
affected.

          14.  TIME OF THE ESSENCE.  Time is of the essence of every term and
               -------------------                                           
provision of this Agreement.

          15.  SEVERABILITY.  If any provision of this Agreement, or the
               ------------                                             
application of such provision to any Person or circumstance, shall be held
invalid by a court of competent jurisdiction, the remainder of this Agreement,
or the application of such provision to Persons or circumstances other than
those to which it is held invalid by such court, shall not be affected thereby.

          16.  EXHIBITS.  Exhibits A through B attached hereto are incorporated
               --------   ----------         -                                 
herein by this reference.

                                       12

 
          17.  ENTIRE AGREEMENT.  This Agreement and the other Transaction
               ----------------                                           
Documents are the entire agreement between the parties with respect to the
subject matter hereof and supersede all prior agreements and negotiations.

          18.  AUTHORITY.  Each individual and entity executing this Agreement
               ---------                                                      
hereby represents and warrants that he, she or it has the capacity set forth on
the signature pages hereof with full power and authority to bind the party on
whose behalf he, she or it is executing this Agreement to the terms hereof.

          19.  INCONSISTENCIES WITH PARTNERSHIP AGREEMENT.  If and to the extent
               ------------------------------------------                       
that any terms or provisions of this Agreement are inconsistent with any terms
or provisions of the Partnership Agreement, the terms and provisions of this
Agreement shall govern and control.

          20.  CONSENT TO JURISDICTION AND SERVICE OF PROCESS.  ALL JUDICIAL
               ----------------------------------------------               
PROCEEDINGS BROUGHT AGAINST ANY PARTY HERETO ARISING OUT OF OR RELATING TO THIS
AGREEMENT MAY BE BROUGHT IN ANY STATE OR FEDERAL COURT OF COMPETENT JURISDICTION
IN THE STATE OF CALIFORNIA, AND BY EXECUTION AND DELIVERY OF THIS AGREEMENT EACH
PARTY HERETO ACCEPTS FOR ITSELF, GENERALLY AND UNCONDITIONALLY, THE NONEXCLUSIVE
JURISDICTION OF THE AFORESAID COURTS AND WAIVES ANY DEFENSE OF FORUM NON
CONVENIENS AND IRREVOCABLY AGREES TO BE BOUND BY ANY JUDGMENT RENDERED THEREBY
IN CONNECTION WITH THIS AGREEMENT.  Each party hereby agrees that service of all
process in any such proceeding in any such court may be made by registered or
certified mail, return receipt requested, to any party hereto, at its address
provided in this Agreement, such service being hereby acknowledged by each party
to be sufficient for personal jurisdiction in any action against such party in
any such court and to be otherwise effective and binding service in every
respect.  Nothing herein shall affect the right to serve process in any other
manner permitted by law.

          21.  WAIVER OF JURY TRIAL.  EACH OF THE PARTIES TO THIS AGREEMENT
               --------------------                                        
HEREBY AGREES TO WAIVE ITS RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR
CAUSE OF ACTION BASED UPON OR ARISING OUT OF THIS AGREEMENT OR THE SUBJECT
MATTER OF THIS AGREEMENT.  The scope of this waiver is intended to be all-
encompassing of any and all disputes that may be filed in any court and that
relate to the subject matter of this Agreement, including, without limitation,
contract claims, tort claims, breach of duty claims and all other common law and
statutory claims.  Each party hereto acknowledges that this waiver is a material
inducement to enter into a business relationship, that each has already relied
on this waiver in entering into this Agreement, and that each shall continue to
rely on this waiver in their related future dealings.  Each party hereto further
warrants and represents that is has reviewed this waiver with its legal counsel
and that it knowingly and voluntarily waives its jury trial rights following
consultation with such legal counsel.  THIS WAIVER IS IRREVOCABLE, MEANING THAT
IT MAY NOT BE MODIFIED EITHER ORALLY OR IN WRITING, AND THIS WAIVER SHALL APPLY
TO ANY 

                                       13

 
SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS OR MODIFICATIONS TO THIS AGREEMENT.
In the event of litigation, this Agreement may be filed as a written consent to
a trial by the court.


                           [SIGNATURES ON NEXT PAGE]

                                       14

 
  IN WITNESS WHEREOF, each of the parties hereto has executed this Agreement as
of the date and year first written above.

PARTNERSHIP:             ONE EMBARCADERO CENTER VENTURE,
                         a California general partnership

                         By:  BOSTON PROPERTIES LLC,
                              a Delaware limited liability company,
                              as Managing General Partner

                              By:   BOSTON PROPERTIES LIMITED
                                    PARTNERSHIP, a Delaware limited
                                    partnership, as Manager

                                    By:  BOSTON PROPERTIES, INC.,
                                         a Delaware corporation,
                                         as General Partner



                                         By: /s/ Thomas J. O'Connor
                                            -------------------------
                                         Name: Thomas J. O'Connor
                                         Title: Vice President


BPLLC:                   BOSTON PROPERTIES LLC,
                         a Delaware limited liability company

                         By:  BOSTON PROPERTIES LIMITED
                              PARTNERSHIP, a Delaware limited
                              partnership, as Manager

                              By:   BOSTON PROPERTIES, INC.,
                                    a Delaware corporation,
                                    as General Partner



                                    By: /s/ Thomas J. O'Connor
                                       -------------------------
                                    Name: Thomas J. O'Connor
                                    Title: Vice President

                      [SIGNATURES CONTINUED ON NEXT PAGE]

                                      S-1

 
HOLDINGS LLC:            BP EC1 HOLDINGS LLC,
                         a Delaware limited liability company

                         By:  BOSTON PROPERTIES LIMITED
                              PARTNERSHIP, a Delaware limited
                              partnership, its Manager

                              By:   BOSTON PROPERTIES, INC.,
                                    a Delaware corporation,
                                    as General Partner



                                    By: /s/ Thomas J. O'Connor
                                       -------------------------
                                    Name: Thomas J. O'Connor
                                    Title: Vice President


PIC:                     PIC REALTY CORPORATION,
                         a Delaware corporation



                         By: /s/ Gary L. Frazier
                            ---------------------------------
                         Name: ______________________________
                         Title: _____________________________

                                      S-2

 
                                   EXHIBIT A

                               DETERMINATION OF
                     FAIR MARKET VALUE OF INVESTMENT NOTES
                     -------------------------------------


     The Fair Market Value of each Investment Note shall equal the aggregate
Remaining Cash Flow for such Investment Note discounted from each respective
scheduled payment due date to the Redemption Date at a discount factor equal to
the Discount Rate for such Investment Note. Notwithstanding the foregoing, if on
the Determination Date an Investment Loan Borrower Credit Event exists, then the
Managing Partner shall appoint an investment banking firm of national
recognition (which will be satisfactory to PIC in its reasonable discretion) to
determine the change in the Fair Market Value of the Investment Notes for
purposes of this Agreement.  In the event that an investment banking firm is
appointed to determine the change in the Fair Market Value of any Investment
Note as of the Determination Date pursuant to the preceding sentence, such
investment banking firm shall be instructed to determine the change in the Fair
Market Value of such Investment Note based on the following four factors: (i)
changes in market interest rates since the date of funding of the Investment
Note, (ii) the time period remaining from the Determination Date until the
earlier of the next Rate Reset Date of such Investment Note and the maturity of
the Investment Note, (iii) the Remaining Cash Flow (as defined below) of the
Investment Note, and (iv) changes in the credit quality of the Investment Note
since the date of funding thereof.  The parties agree that an acceptable
investment banking firm would be Goldman Sachs or Merrill Lynch & Company.  As
used herein, the term "INVESTMENT LOAN BORROWER CREDIT EVENT" shall mean any of
the following events: (x) the credit rating of the Investment Notes has been
downgraded from the credit rating of the Investment Notes on the date hereof by
both of the Rating Agencies, or (y) in the reasonable discretion of the Managing
Partner, there has been, as compared to the date hereof, a material diminution
or degradation in the value of the assets of the Investment Loan Borrower, or
the ability of the Investment Loan Borrower to pay its outstanding obligations,
as they become due from the date hereof.

                                 Defined Terms
                                 -------------

     As used herein, the following terms shall have the following meanings:

     "DETERMINATION DATE" shall mean the date upon which the Fair Market Value
of the Investment Notes is determined and shall occur at noon (New York City
time) on the  business day immediately prior to the Redemption Date (which
Determination Date must be the calendar day immediately preceding the Redemption
Date).

     "DISCOUNT RATE" shall mean the Reinvestment Rate plus the Margin.

     "MARGIN" shall mean, with respect to any Investment Note, the Margin then
in effect (as defined in the Investment Loan Note Purchase Agreement) of such
Investment Note.

                                      A-1

 
     "RATING AGENCIES" shall mean Fitch IBCA, Inc. and Standard and Poor's
Corporation.

     "REINVESTMENT RATE" shall mean, with respect to any Investment Note, the
offered-side yield to maturity as of the Determination Date of the U.S. Treasury
security that was used to determine the then Treasury of such Investment Note.
Such offered-side yield to maturity shall be determined on or about noon on the
Determination Date and PIC and the Partnership shall cooperate in the
determination of such Reinvestment Rate.

     "REMAINING CASH FLOW" shall mean, for any Investment Note, the aggregate
amount of all accrued and unpaid interest, principal and other payments under
such Investment Note on the Redemption Date and all principal, interest and
other payments that will become due and owing under such Investment Note from
time to time from and after the Redemption Date through (x) the next Rate Reset
Date of such Investment Note (the "NEXT RESET DATE"), if the Fair Market Value
is determined prior to such Rate Reset Date, or (y) the maturity of such
Investment Note (including, without limitation, any balloon or other principal
payments due and owing on said maturity date), if the Fair Market Value is
determined after all Rate Reset Dates provided in such Investment Note, as each
such payment would become due and payable pursuant to the terms of the
applicable Investment Note and the Investment Loan Documents (but assuming, if
clause (x) above applies, that any interest that is scheduled to be accrued but
- ----------                                                                     
unpaid as of the Next Reset Date (i.e., because the interest payment date with
                                  ----                                        
respect thereto will not have occurred), and any outstanding principal and any
other amounts scheduled to be owing under the Investment Note on such Next Reset
Date, will be repaid in full on the Next Reset Date; and further assuming, for
purposes of calculating all future interest payments due under such Investment
Note, that the interest rate in effect with respect to the Investment Note on
the Redemption Date will remain constant for purposes of determining the Fair
Market Value of such Investment Note).

                                      A-2

 
                                   EXHIBIT B

                                  CERTIFICATE
                           REGARDING INVESTMENT LOAN
                           -------------------------

          THIS CERTIFICATE (this "CERTIFICATE") is made and dated as of
___________, by ONE EMBARCADERO CENTER VENTURE, a California general partnership
("PARTNERSHIP"), for the benefit of PIC REALTY CORPORATION, a Delaware
corporation ("PIC").

          Pursuant to that certain Redemption Agreement dated as of November 12,
1998 (the "REDEMPTION AGREEMENT"), the Partnership (and its partners other than
PIC) and PIC have been granted certain rights to cause PIC's interest in the
Partnership to be fully redeemed in exchange for the distribution of all or a
portion of the Investment Notes and, if applicable pursuant to the terms and
provisions of the Redemption Agreement, cash to PIC.  All capitalized terms used
herein without definition shall have the respective meanings given such terms in
the Redemption Agreement.

          Concurrently herewith and on the date hereof, the Partnership is
distributing the Investment Notes (or a portion thereof) to PIC in accordance
with the applicable terms and provisions of the Redemption Agreement.

          With respect to the distribution of such Investment Notes, the
Partnership hereby represents and warrants to PIC as of the date hereof as
follows:

          (a) Subject to the rights of The Prudential Insurance Company of
America or a permitted assignee or designee ("OPTIONEE") under that certain
Option and Put Agreement dated as of November 12, 1998 (the "OPTION AGREEMENT"),
the Partnership is the sole owner of the Investment Notes.  Further, the
Investment Notes delivered to PIC on the date hereof pursuant to the Redemption
Agreement are free and clear of all liens and third party interests of any kind
or nature other than the interests and rights of Optionee under the Option
Agreement.  The Partnership has not amended, modified, terminated or otherwise
by written agreement altered the Investment Notes or the Investment Loan
Documents except as specifically disclosed to PIC in writing prior to the date
hereof and except for the division of any Investment Note pursuant to Section
2(a) of the Redemption Agreement.

          (b) The Partnership has not assigned or transferred the Investment
Notes or any of the Investment Loan Documents (except to secure the Equity
Redemption Loan, which assignment has been or simultaneously herewith is being,
released in full in writing), nor are there any agreements to assign or convey
any portion of the Investment Notes or such Investment Loan Documents to any
Person other than PIC and Optionee (in accordance with the Option Agreement).

                                      B-1

 
          (c) The Partnership has all requisite power and authority to execute
and deliver all instruments and other documents to be executed and delivered by
the Partnership in connection with the distribution of the Investment Notes to
PIC on the date hereof and to execute this Certificate.

          (d) The Partnership is a duly formed general partnership under the
laws of the State of California, and is legally authorized to execute, deliver
and perform the Redemption Distribution and this Certificate, and this
Certificate is legal, valid and binding on the Partnership enforceable against
it in accordance with its terms, except to the extent that enforcement may be
limited by applicable bankruptcy, insolvency, moratorium and other principles
relating to or limiting the rights of contracting parties generally.

          (e) The execution of this Certificate and the performance of the
Redemption Distribution by the Partnership will not conflict with or result in a
breach of any statute, rule, regulation, judgment, decree or order of any court,
board, committee or governmental agency to which the Partnership is subject, nor
violate any agreement or contract to which the Partnership is a party or by
which the Partnership is bound.  No consent, approval, authorization or order of
any court or governmental agency or body is required for the execution, delivery
and performance by the Partnership of, or compliance by the Partnership with,
the Certificate or the consummation of the Redemption Distribution, except for
such consents, approvals, authorizations or orders, if any, that have been
obtained.

          Each of the foregoing representations and warranties are personal to
PIC and no Person other than PIC shall be entitled to bring any action based
thereon.  Each of the foregoing representations and warranties shall survive the
consummation of the Redemption Distribution.

          The Partnership hereby acknowledges that the acceptance of the
Redemption Distribution and the Investment Notes by PIC was made and will have
been made in material reliance by PIC on the aforestated representations and
warranties of the Partnership.

                                      B-2

 
          IN WITNESS WHEREOF, the Partnership has caused its duly authorized
representative to execute this Certificate as of the date first above written.

PARTNERSHIP:             ONE EMBARCADERO CENTER VENTURE,
                         a California general partnership

                         By:  BOSTON PROPERTIES LLC,
                              a Delaware limited liability company,
                              as Managing General Partner

                              By:   BOSTON PROPERTIES LIMITED
                                    PARTNERSHIP, a Delaware limited
                                    partnership, as Manager

                                    By:  BOSTON PROPERTIES, INC.,
                                         a Delaware corporation,
                                         as General Partner



                                         By:____________________________
                                         Name:__________________________
                                         Title:_________________________
 
                                      B-3

 
                                                                   EXHIBIT 99.16


                             REDEMPTION AGREEMENT


          THIS REDEMPTION AGREEMENT (this "AGREEMENT") dated as of November 12,
1998, is made and entered into by and among EMBARCADERO CENTER ASSOCIATES, a
California general partnership ("PARTNERSHIP"), BOSTON PROPERTIES LLC, a
Delaware limited liability company ("BPLLC"), BP EC2 HOLDINGS LLC, a Delaware
limited liability company ("HOLDINGS LLC"), and PIC REALTY CORPORATION, a
Delaware corporation ("PIC").


                                R E C I T A L S
                                - - - - - - - -

          A.   Pursuant to that certain Master Transaction Agreement dated as of
September 28, 1998, by and among Boston Properties Limited Partnership, Boston
Properties, Inc., The Prudential Insurance Company of America, PIC, Fedmark
Corporation, Embarcadero Center Investors Partnership, Pacific Property
Services, L.P. and certain other persons listed on Exhibit A thereto (the
"MASTER TRANSACTION AGREEMENT"), BPLLC, Holdings LLC and PIC have become the
sole partners of the Partnership, which Partnership is currently governed by
that certain Third Amended and Restated Partnership Agreement of Embarcadero
Center Associates of even date herewith (the "PARTNERSHIP AGREEMENT").  All
capitalized terms used herein without definition shall have the respective
meanings given such terms in the Partnership Agreement.

          B.   PIC desires to acquire the right to have its entire interest in
and to the Partnership (the "PIC INTEREST") redeemed by the Partnership at any
time from and after the date hereof in accordance with the terms and provisions
of this Agreement below, and BPLLC and Holdings LLC desire to acquire the right
to cause the PIC Interest to be redeemed by the Partnership at any time after
the date which is ninety (90) days after the date hereof in accordance with the
terms and provisions of this Agreement below, all as hereinafter provided.

          C.   In connection with the redemption transactions described in
Recital B above, the parties hereto desire to make certain additional covenants
- ---------                                                                      
and agreements as hereinafter set forth.

          NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged by the parties hereto, the parties
hereby agree as follows:

          1.   REDEMPTION EVENT.
               ---------------- 

          (A) The PIC Interest shall be fully redeemed by the Partnership in the
manner provided in Section 2 below in the event that a PIC Redemption Notice is
                   ---------                                                   
duly given to BPLLC 

                                       1

 
or any other Person who is then the managing partner of the Partnership (the
"MANAGING PARTNER") in accordance with subsection (b) below or a Partnership 
                                       --------------         
Redemption Notice is duly given to PIC by BPLLC or Holdings LLC (on behalf of
the Partnership) in accordance with subsection (c) below.
                                    --------------       

          (B) At any time after the date hereof, PIC may elect to have the PIC
Interest fully redeemed by the Partnership in accordance with Section 2 below by
                                                              ---------         
giving written notice (a "PIC REDEMPTION NOTICE") to the Managing Partner
stating that PIC is electing to have the PIC Interest fully redeemed pursuant to
this Agreement; provided that, notwithstanding the foregoing, PIC's right to
                -------- ----                                               
give a PIC Redemption Notice and to be redeemed at its election shall be
suspended during any period of time while there exists an Investment Loan
Borrower Credit Event (as defined in Exhibit A attached hereto).  A PIC
                                     ---------                         
Redemption Notice shall only be effective if simultaneously with the giving of
such notice (x) PIC delivers a similar notice with respect to the Redemption
Agreement of even date herewith to which PIC and One Embarcadero Center Venture
are parties, (y) The Prudential Insurance Company of America delivers a similar
notice with respect to the Redemption Agreements of even date herewith to which
it is a party with Three Embarcadero Center Venture and Four Embarcadero Center
Venture, respectively (such similar notices of PIC and Prudential, the
"CORRESPONDING NOTICES"), and (z) each Corresponding Notice specifies the same
Redemption Date as is specified in the PIC Redemption Notice.

          (C) At any time on or after the date which is five (5) business days
prior to the date which is ninety (90) days after the date hereof (i.e., such
                                                                   ----      
that the Redemption Date selected by BPLLC or Holdings LLC shall not occur prior
to the date which is ninety (90) days after the date hereof), either BPLLC or
Holdings LLC may elect to have the Partnership fully redeem the PIC Interest in
accordance with Section 2 below by giving written notice (the "PARTNERSHIP
                ---------                                                 
REDEMPTION NOTICE") to PIC stating that the Partnership is electing to have the
PIC Interest fully redeemed pursuant to this Agreement; provided that,
                                                        -------- ---- 
notwithstanding the foregoing, BPLLC's and Holding LLC's right to give a
Partnership Redemption Notice and to cause the Partnership to redeem the PIC
Interest at either of their elections shall be suspended during any period of
time while any of the Investment Notes have been accelerated and such
acceleration has not been rescinded by the holder(s) of such Investment Notes.

          (D) As used herein, the following terms shall have the following
meanings:

          "AMORTIZED LEASING COSTS" shall mean, for any period, the sum of the
amortized portion of all Investor Leasing Costs (as defined in the Master
Transaction Agreement) and New Leasing Costs for such period, it being
acknowledged and agreed that all such Investor Leasing Costs and New Leasing
Costs shall be amortized on a straight-line basis monthly over the base term of
the applicable lease commencing on the rent commencement date for such lease,
plus interest on the unamortized portion of all Investor Leasing Costs and New
- ----                                                                          
Leasing Costs outstanding from time to time during such period at the rate of
ten percent (10%) per annum.

                                       2

 
          "BROKEN LIBOR COST" shall mean the extra payment which the Partnership
must make on account of repaying the Equity Redemption Loan on a date other than
the end of an "interest period" because the Redemption Date falls on a date
other than the end of an "interest period" (it being acknowledged and agreed by
the parties hereto that, if the Redemption Date falls on a date which is the end
of an "interest period", there shall be no Broken LIBOR Cost for purposes of
this Agreement).  The Managing Partner shall, at the request of PIC, provide PIC
with a schedule showing the end of all "interest periods" for purposes of timing
the Redemption Distribution and PIC may rely on such schedule for purposes of
designating a Redemption Date.

          "FAIR MARKET VALUE OF THE INVESTMENT NOTES" shall be determined
pursuant to and in accordance with the terms and provisions of Exhibit A
                                                               ---------
attached hereto.

          "FAIR MARKET VALUE OF THE PIC INTEREST" shall equal, on the Redemption
Date, the sum of $96,178,575 (which amount equals PIC's Percentage Interest
immediately prior to the Redemption Distribution multiplied by the NMV (defined
in the Master Transaction Agreement) of the Property as of the date hereof,
adjusted to:

          (i)   add an amount equal to the product of PIC's Percentage Interest
                ---                                                            
     immediately prior to the Redemption Distribution, multiplied by any
                                                       ---------- --    
     Unrealized Gain (defined below), if any, on the Investment Notes as of the
     Determination Date (described in Exhibit A attached hereto) or deduct an
                                      ---------                     ------   
     amount equal to the product of PIC's Percentage Interest immediately prior
     to the Redemption Distribution, multiplied by any Unrealized Loss (defined
                                     ---------- --                             
     below), if any, on the Investment Notes as of the Determination Date;

          (ii)  deduct all distributions (other than the Redemption Distribution
                ------                                                          
     and any distribution of OP Units) actually made by the Partnership to (and
     received by) PIC from and after the date hereof through and including the
     Redemption Date;

          (iii) add any Capital Contributions made by PIC from and after the
                ---                                                         
     date hereof through and including the Redemption Date;

          (iv)  add an amount equal to the product of PIC's Percentage Interest
                ---                                                            
     immediately prior to the Redemption Distribution, multiplied by the
                                                       ---------- --    
     estimated Operating Profits, if any, for the period from and after the date
     hereof through and including the Redemption Date or deduct an amount equal
                                                         ------                
     to PIC's Percentage Interest immediately prior to the Redemption
     Distribution, multiplied by the estimated Operating Losses, if any, for the
                   ---------- --                                                
     period from and after the date hereof through and including the Redemption
     Date;

          (v)   deduct an amount equal to the unamortized portion of all
                ------                                                  
     Interest Rate Approved Loan Costs with respect to the Prudential Guarantied
     Loan (which Prudential Guarantied Loan will be assumed by PIC in connection
     with the Redemption Distribution); and

                                       3

 
          (vi)   subtract an amount equal to the Broken Libor Cost (if any); and
                 --------                                                       

          (vii)  add an amount equal to the difference between the NEV (as
                 ---                                                      
     defined in the Master Transaction Agreement) of the Property minus the NMV
     of the Property (if such difference is a positive number) or subtract an
                                                                  --------   
     amount equal to the difference between the NMV of the Property minus the
     NEV of the Property (if the difference is a positive number); provided
                                                                   --------
     that, if, as of the Redemption Date, the Adjusted NEV (as defined in the
     ----                                                                    
     Master Transaction Agreement) shall have been determined in accordance with
     Exhibit V of the Master Transaction Agreement, then in lieu of the
     adjustment provided for in this clause (vii) above, an adjustment shall be
                                     ------------                              
     made to add an amount equal to the Revised NEV (defined immediately below)
             ---                                                               
     of the Property minus the NMV of the Property (if such difference is a
     positive number) or subtract an amount equal to the NMV of the Property
                         --------                                           
     minus the Revised NEV of the Property (is such difference is a positive
     number).  As used herein, the "REVISED NEV OF THE PROPERTY" shall mean an
     amount equal to the sum of the NEV of the Property plus or minus, as the
     case may be, the adjustment made to the NEV pursuant to Section V-9-1 of
     Exhibit V of the Master Transaction Agreement.

For purposes of determining estimated Operating Profits or Operating Losses
hereunder, the Managing Partner shall provide PIC with its calculation of
estimated Operating Profits or Operating Losses prior to the Redemption
Distribution, which calculation shall be subject to PIC's approval (not to be
unreasonably withheld or delayed), and the Partnership and PIC shall thereafter
make any necessary adjustments to said calculation as complete information
becomes available within thirty (30) days after the Redemption Date in
accordance with the terms and provisions of Section 2(e) below.
                                            ------------       

          "LEASING COSTS" shall mean any and all (i) tenant improvement
allowances, move-in allowances, brokerage commissions, expenses incurred or to
be incurred for repairs, improvements, equipment, painting, decorating,
partitioning and other items to satisfy the tenant's requirements for the
commencement of the applicable lease, (ii) the cost of removal and/or abatement
of asbestos or other hazards or toxic substances located in the demised space in
violation of law and as required in order to satisfy the tenant's requirements
for the commencement of the applicable lease, (iii) rent concessions as stated
in the respective lease (and applicable lease documents) relating to the demised
space provided the tenant has the right to take possession of such demised space
during the period of such rent concessions, (iv) base building modifications
required by the applicable lease, and (v) expenses incurred or to be incurred
for the purpose of satisfying or terminating the obligations of a tenant to the
landlord under another lease.

          "OP UNITS" shall mean a number Series Three Preferred Units in Boston
Properties Limited Partnership equal to the product of (i) PIC's Percentage
Interest in the Partnership immediately prior to the "Closing" under the Master
Transaction Agreement, multiplied by (ii) the total number of Series Three
                       ---------- --                                      
Preferred Units in Boston Properties Limited Partnership actually received by
the Partnership from Two Embarcadero Center West and Three Embarcadero Center
West.

                                       4

 
          "NEW LEASING COSTS" shall mean all Leasing Costs incurred by the
Partnership in connection with any new Leases executed after the date hereof and
prior to the Redemption Date.

          "OPERATING ASSETS" shall mean all real property, improvements, leases,
licenses, fixtures and tangible and intangible personal property owned by the
Partnership on the date hereof other than cash, deposit accounts and money.

          For any period, "OPERATING PROFITS" shall mean the absolute value of
the following amount (if positive) and "OPERATING LOSSES" shall mean the
absolute value of the following amount (if negative): net income (loss) of the
Partnership for such period determined in accordance with GAAP without giving
effect to extraordinary gains (or losses) or any taxes on or measured by such
net income or loss, plus the sum of (i) all amortization and depreciation
                    ----                                                 
expense and other non-cash expenses (it being acknowledged by the parties hereto
that principal payments on account of debt and capital expenditures other than
those amortized during any period for which net income (loss) is being
determined are not taken into account or deducted when calculating net income
(loss) under GAAP), (ii) all Leasing Costs that are not treated as capital
expenditures under GAAP, (iii) all interest expense of the Partnership on loans
made by any BP Partner under the Partnership Agreement (which loans are
evidenced by a BP Note) and (iv) all fees, costs and expenses (other than
interest expense) incurred by the Partnership or any Partner in connection with
any Partnership loan which were deducted as an expense (rather than amortized)
other than non-amortizable fees, costs and expenses for Approved Loan Costs and
non-amortizable Excess Proceeds Borrowing Costs, minus the Amortized Leasing
                                                 -----                      
Costs for such period and the amortized portion of the Approved Loan Costs and
the Excess Proceeds Borrowing Costs for such period. Operating Profits and
Losses for any partial month shall be prorated on the basis of the actual number
of days of such month and a 365-day year.

          "REDEMPTION AMOUNT" shall equal (i) the Fair Market Value of the PIC
Interest on the Redemption Date, plus (ii) the outstanding principal balance of
                                 ----                                          
the Prudential Guarantied Loan assumed by PIC on the Redemption Date in
connection with the distribution of the Investment Notes to PIC, together with
all accrued but unpaid interest on the Prudential Guarantied Loan as of such
date.

          "REDEMPTION DATE" shall mean the earlier of (x) the date specified in
a PIC Redemption Notice given by PIC to the Managing Partner (provided that such
                                                              -------- ----     
date shall be at least five (5) business days after the giving of such PIC
Redemption Notice), and (y) the date specified in a Partnership Redemption
Notice given by BPLLC or Holdings LLC to PIC (provided that such date shall be
                                              -------- ----                   
at least five (5) business days after the giving of such Partnership Redemption
Notice).

          "UNREALIZED GAIN" shall mean the excess (if any) of (x) the aggregate
Fair Market Value of all Investment Notes (provided that, in calculating the
Fair Market Value of the Investment Notes for purposes of determining Unrealized
Gain, the accrued and unpaid interest 

                                       5

 
thereunder as of the Redemption Date shall not be added to the Remaining Cash
Flow), minus (y) the aggregate face amounts of all Investment Notes.
       -----                               

          "UNREALIZED LOSS" shall mean the excess (if any) of (A) the aggregate
face amounts of all Investment Notes minus (B) the aggregate Fair Market Value
                                     -----                                    
of all Investment Notes (provided that, in calculating the Fair Market Value of
the Investment Notes for purposes of determining Unrealized Loss, the accrued
and unpaid interest thereunder as of the Redemption Date shall not be added to
the Remaining Cash Flow).

          2.   REDEMPTION DISTRIBUTION.
               ----------------------- 

          (A) On the Redemption Date the Partnership shall distribute to PIC, as
a "REDEMPTION DISTRIBUTION" in full redemption of the PIC Interest, (i) the
Partnership's entire right, title and interest in, to and under the Investment
Notes (subject to the Prudential Guarantied Loan) and all rights in, to and
under the other instruments and agreements relating to the Investment Loan
(collectively, the "INVESTMENT LOAN DOCUMENTS") (provided that, the Partnership
                                                 -------- ----                 
shall retain all claims, rights, obligations and liabilities under the
Investment Loan Documents accruing prior to the Redemption Date (except the
right to any accrued and unpaid interest under the Investment Notes distributed
to PIC as of the Redemption Date, which shall be paid to PIC after the
Redemption Date and which is included and accounted for in the calculation of
the Fair Market Value of the Investment Notes pursuant to Exhibit A attached
                                                          ---------         
hereto), and if the Partnership retains any Remainder Notes pursuant to the
provisions of this Section 2(a) below, the Partnership shall retain all rights,
                   ------------                                                
obligations and liabilities under the Investment Loan Documents relating to such
Remainder Notes, if any, retained by the Partnership (both accruing prior to and
after the Redemption Date), (ii) if the Redemption Amount exceeds the aggregate
Fair Market Value of the Investment Notes, cash in an amount equal to the
difference between the Redemption Amount and the aggregate Fair Market Value of
the Investment Notes, and (iii) if and to the extent that the Partnership has
not already distributed to PIC the OP Units, the OP Units. Notwithstanding the
foregoing, if the aggregate Fair Market Value of all Investment Notes on the
Redemption Date exceeds the Redemption Amount on such date, then (A) on the
Redemption Date the Partnership shall assign to PIC its entire interest in only
such Investment Notes (in the order provided in the next sentence) that
collectively have an aggregate Fair Market Value at the time of such assignment
equal to the Redemption Amount, and (B) the Partnership shall cause any
individual Investment Note which is only partially assigned to PIC in accordance
with the next sentence to be replaced by the issuer thereof with two notes in
accordance with the terms and provisions of the next sentence.  In connection
with the distribution of Investment Notes pursuant to the immediately preceding
sentence, the Partnership shall distribute to PIC those Investment Notes with
the latest maturity dates one by one beginning with the Investment Note with the
latest maturity date and then the Investment Note with the next latest maturity
date and so forth until the total Fair Market Value of all Investment Notes
distributed to PIC equals the Redemption Amount; provided that, if necessary in
                                                 -------- ----                 
order to distribute to PIC Investment Notes with a Fair Market Value exactly
equal to the Redemption Amount, the last Investment Note to be distributed will
be divided into two notes collectively having an aggregate principal amount
equal to such original Investment

                                       6

 
Note and otherwise having identical terms, so that one of such notes (when taken
together with the other Investment Notes distributed to PIC in accordance with
the order of priority set forth hereinabove) will have a Fair Market Value equal
to the Redemption Amount and such note shall be assigned to PIC by the
Partnership. If less than all of the Investment Notes are assigned to PIC in
connection with the Redemption Distribution as provided above, the Investment
Note(s) retained by the Partnership shall be collectively referred to herein as
the "REMAINDER NOTES".

          (B) Concurrently with the Redemption Distribution, the Partnership
shall execute and deliver to PIC an Investment Loan Certificate in the form of
Exhibit B attached hereto without modification.
- ---------                                      

          (C) Concurrently with the Redemption Distribution, the Partnership
shall assign to PIC, and PIC shall accept and assume, the Prudential Guarantied
Loan and all instruments and agreements relating thereto, and PIC shall
thereafter be subject to all claims, rights, obligations and liabilities
thereunder accruing from and after the Redemption Date (except that PIC shall
also assume and be subject to the obligation to pay all accrued but unpaid
interest under such Prudential Guarantied Loan as of and including the
Redemption Date to the extent the same has not yet become due and payable under
the Prudential Guarantied Loan Documents); and the lender under such documents
shall release the Partnership, in a writing delivered to the Partnership, from
all claims, rights, obligations and liabilities thereunder accruing from and
after the Redemption Date and from the obligation to pay any accrued and unpaid
interest under such Prudential Guarantied Loan as of and including the
Redemption Date to the extent such interest payment has not yet become due and
payable under the Prudential Guarantied Loan Documents.

          (D) It shall be a condition precedent to the consummation of the
transactions described in subsections (a), (b) and (c) above that all occur
                          ---------------  ---     ---                     
simultaneously.

          (E) Within thirty (30) days after the end of the calendar month in
which the Redemption Date occurs, the Partnership and PIC shall obtain all
necessary and complete information regarding the Operating Profits or Operating
Losses of the Partnership accruing from the date hereof through and including
the Redemption Date and shall agree upon and make any necessary adjustments to
the estimated Operating Profits or Operating Losses of the Partnership which
were utilized in calculating the Fair Market Value of the PIC Interest on the
Redemption Date.  If, after making such adjustments, the actual Operating
Profits of the Partnership are greater than the estimated Operating Profits
utilized to determine the Fair Market Value of the PIC Interest on the
Redemption Date, or the actual Operating Losses are less than the estimated
Operating Losses, as the case may be, then the Partnership shall promptly make a
cash payment to PIC equal to the difference.  If, after making such adjustments,
the actual Operating Profits of the Partnership are less than the estimated
Operating Profits utilized to determine the Fair Market Value of the PIC
Interest on the Redemption Date, or the actual Operating Losses are greater than
the estimated Operating Losses, as the case may be, then PIC shall promptly make
a cash payment to the Partnership equal to the difference.  In addition to the
foregoing, if the Adjusted NEV of the Property has not been determined pursuant
to Exhibit V of the Master Transaction Agreement

                                       7

 
as of the Redemption Date, then promptly following such determination of
Adjusted NEV of the Property, if any, pursuant to said Exhibit V, if the Revised
NEV of the Property exceeds the NEV of the Property, the Partnership shall pay
to PIC, in cash, a sum equal to such difference, and if the NEV of the Property
exceeds the Revised NEV of the Property, then PIC shall pay to the Partnership,
in cash, a sum equal to such difference.

          3.   COVENANTS; INDEMNITIES.
               ---------------------- 

          (A)  BPLLC, Holdings LLC, PIC and the Partnership (on behalf of
themselves and their respective successors and assigns) each hereby covenants
and agrees with each other that, during the period of time from the date hereof
through and including the second (2nd) anniversary of the Redemption Date, (i)
none of the Equity Redemption Loan obtained by the Partnership on the date
hereof pursuant to the terms of the Partnership Agreement or any debt replacing
any such Equity Redemption Loan in accordance with the terms and provisions of
the Partnership Agreement, shall be repaid by any Capital Contributions made by
any Partner of the Partnership, (ii) the Partnership shall at all times maintain
and continue its existence as a general partnership under the laws of the State
of California and shall not be dissolved, wound-up or terminated during such
period of time, and (iii) except as otherwise expressly provided in this
Agreement, the Partnership shall not distribute all or any portion of its
Operating Assets to any Partner.  Each of the afore-mentioned Persons (on behalf
of themselves and their Affiliates) hereby covenants not to commit any act in
violation of this covenant (or to permit any successor or assign of any such
Person to commit any such act).

          (B)  In addition to, and not in limitation of, any other rights and
remedies available to the parties hereto under this Agreement or at law or in
equity, each party hereto (on behalf of itself) agrees that, in the event of a
breach by any party or its Affiliate (such party, the "breaching party") of any
of the covenants set forth in subsection (a) above, such breaching party shall
                              --------------                                  
indemnify, protect, defend and hold harmless the other party(ies) from and
against any and all claims, causes of action, losses, liabilities, damages,
costs and expenses of whatsoever kind or nature (including, without limitation,
reasonable attorneys' fees and expenses and any adverse income tax consequences,
including, but not limited to, any interest and penalties) arising out of or in
any way resulting from or directly relating to such breach.

          4.   TAX MATTERS.
               ----------- 

          (A)  If the PIC Interest is redeemed as contemplated by this Agreement
and the Internal Revenue Service ("IRS") subsequently questions, or determines
that it will examine, investigate or audit any federal income tax returns filed
by the Partnership in respect of any taxable year of the Partnership ending in
the calendar year in which the Redemption Distribution occurred (the "SUBJECT
RETURNS"), then (i) the then Partners of the Partnership shall cause the
Partnership to promptly furnish PIC with copies of all written notices received
from the IRS, and (ii) PIC shall have the right, at its expense, to represent
the Partnership (with professionals of its choice) in dealing with the IRS in
connection with any such questions, examination, investigation

                                       8

 
or audit and in connection with any judicial or administrative proceedings
related thereto, in each case only to the extent that they involve any items
("PIC ITEMS") which could have a material impact on PIC, and to make decisions
regarding or relating to all PIC Items, except that PIC shall not make any
decisions which could materially adversely impact BPLLC and/or Holdings LLC
without the prior written consent of BPLLC and Holdings LLC. Each of BPLLC and
Holdings LLC agrees (on behalf of itself and its successors and assigns) that
neither it nor the Partnership will settle with the IRS with respect to any PIC
Item without the prior written consent of PIC, which consent will not be
unreasonably withheld.

          (B) BPLLC and Holdings LLC shall cause the Partnership to, and the
Partnership shall, report the redemption of the PIC Interest pursuant to this
Agreement in a manner consistent with the characterization of such transaction
herein, that is, as a withdrawal of PIC from the Partnership and the redemption
by the Partnership of the PIC Interest in exchange for the distribution of
Partnership property in liquidation of the PIC Interest.  BPLLC and Holdings LLC
shall submit all Subject Returns to PIC for review and approval no later than
thirty (30) days prior to the filing thereof, whether or not PIC is still then a
Partner.  BPLLC and Holdings LLC agree to modify the reporting of the redemption
by the Partnership of the PIC Interest to the satisfaction of PIC to the extent
reasonably requested by PIC in writing within thirty (30) days of the receipt of
any such returns; provided that, such modification does not materially adversely
                  -------- ----                                                 
impact BPLLC and/or Holdings LLC or their Affiliates.  Notwithstanding the
redemption of the PIC Interest prior to the end of any particular calendar year,
BPLLC and Holdings LLC shall each report their participation in the Partnership
with respect to any years ending in the calendar year in which the Redemption
Distribution occurs consistent with the tax returns approved pursuant hereto and
consistent with this Agreement.

          (C) In accordance with Treasury Regulation Section 1.706-1(c)(ii), for
the taxable year of the Partnership in which the Redemption Distribution occurs,
PIC's distributive share of the items described in Section 702(a) of the
Internal Revenue Code of 1986, as amended, will be determined by reference to an
interim closing of the books.  In accordance with Treasury Regulation Section
1.751-1(c)(4)(iii), the Partnership, BPLLC, Holdings LLC, and PIC agree that, on
the Redemption Date, the fair market value of the Partnership's Section 1245
property (as defined in Section 1245(a)(3) of the Internal Revenue Code of 1986,
as amended) is equal to the adjusted tax basis of such property.

          5.   APPOINTMENT OF SUB-MANAGING PARTNER.  Notwithstanding anything to
               -----------------------------------                              
the contrary stated in the Partnership Agreement, in the event that the
Partnership fails to make the Redemption Distribution to PIC as required by
Sections 1 and 2 above on the Redemption Date, then PIC shall have the right,
- ----------     -                                                             
exercisable by written notice to the other Partners of the Partnership, to
appoint itself as the sub-managing partner solely for the purpose of making the
Redemption Distribution.  In such event, PIC shall be solely authorized and
empowered, and its sole responsibility shall be, to make the Redemption
Distribution on, or as soon as practicable after, the Redemption Date.  The
Managing Partner shall continue to act as the managing partner under the
Partnership Agreement during such time and shall fully and faithfully discharge
all obligations

                                       9

 
and duties of the managing partner under the Partnership Agreement other than
those pertaining to the Redemption Distribution (which will be performed and
discharged by PIC on behalf of the Partnership). Immediately after the
Redemption Distribution shall have been accomplished, PIC shall resign as sub
managing partner of the Partnership. Each party hereto further appoints PIC as
the attorney-in-fact of the Partnership to prepare, sign, file and record any
instruments, agreements or other documents, and to take any other action deemed
necessary, useful or desirable by PIC in order to make the Redemption
Distribution pursuant to this Agreement in the event that the Managing Partner
of the Partnership or the Partnership fails to timely discharge its obligations
hereunder within the time periods set forth herein.

          6.   REMEDIES.  Any party hereto shall have the right to initiate an
               --------                                                       
action for specific performance with respect to any breach or default of this
Agreement by, or to enforce any obligation under this Agreement of, any other
party hereto (including, without limitation, the obligation of the Partnership
and the Managing Partner to make the Redemption Distribution pursuant hereto),
it being acknowledged and agreed by the parties hereto that monetary damages
would be an inadequate remedy and would not adequately compensate any non-
defaulting party. In addition to the remedy of specific performance, any non-
breaching party may initiate an action seeking actual damages (including,
without limitation, increased income tax liability which may result from such
breach).  Notwithstanding anything to the contrary stated herein, in the Master
Transaction Agreement or in the "Transaction Documents" described in such Master
Transaction Agreement, the limitations of liability set forth in Article 12 of
the Master Transaction Agreement and/or in any other Transaction Document shall
not apply to this Agreement, nor shall such limitations limit or restrict any
right or remedy available to any party hereunder as a result of the breach or
default of any other party under this Agreement.

          7.   NOTICES.  All notices, elections, consents, approvals, demands,
               -------                                                        
objections, requests or other communications which any party hereto may be
required or desire to give to any other party hereto must be in writing and sent
by (i) first class U.S. certified or registered mail, return receipt requested,
with postage prepaid, (ii) telecopy or facsimile (with a copy sent by first
class U.S. certified or registered mail, return receipt requested, with postage
prepaid), or (iii) express mail or a nationally recognized courier (for next
business day delivery).  For purposes of this Agreement, the addresses of the
parties hereto shall be as provided below:

     BPLLC, Holdings LLC
     or the Partnership:                Boston Properties, Inc.
                                        8 Arlington Street
                                        Boston, Massachusetts 02116-3495
                                        Attn:  General Counsel
                                        Fax:   (617) 421-1555

          with a copy to:               Goulston & Storrs, P.C.
                                        400 Atlantic Avenue
                                        Boston, Massachusetts 02110-3333

                                       10

 
                                    Attn:  Eli Rubenstein, Esq.
                                    Fax:   (617) 574-4112

     PIC or the Partnership:        Prudential Realty Group
                                    8 Campus Drive
                                    4th Floor - Arbor Circle South
                                    Parsippany, New Jersey 07054
                                    Attn:  John R. Triece
                                    Fax:   (201) 683-1797

          with a copy to:           Prudential Insurance Company
                                    of America
                                    Four Embarcadero Center
                                    Suite 2700
                                    San Francisco, California 94111
                                    Attn:  Harry Mixon, Esq.
                                    Fax:   (415) 956-2197

          and a copy to:            O'Melveny & Myers LLP
                                    Embarcadero Center West
                                    275 Battery Street
                                    San Francisco, California 94111
                                    Attn:  Stephen A. Cowan, Esq.
                                    Fax:   (415) 984-8701

Notwithstanding the foregoing, any party may designate another addressee or
change its address for notices and other communications hereunder by a notice
given to the other parties in the manner provided hereinabove.  A notice or
other communication sent in compliance with the provisions of this Section 7
                                                                   ---------
shall be deemed given and received on (a) the third (3rd) day following the date
it is deposited in the U.S. mail, (b) the date of confirmed dispatch if sent by
facsimile or telecopy (provided that a copy thereof is sent by mail in the
manner provided in clause (i) above), or (c) the date it is delivered to the
                   ----------                                               
other party if sent by express mail or courier.

          8.   ATTORNEYS' FEES.  If any action is brought by any party hereto
               ---------------                                               
against another party, relating to or arising out of this Agreement, any of the
transactions contemplated hereby or the enforcement hereof, the prevailing
party(ies) shall be entitled to recover from the other party(ies) reasonable
attorneys' fees and costs incurred in connection with the prosecution or defense
of such action.  For purposes of this Agreement, the term "ATTORNEYS' FEES" or
"ATTORNEYS' FEES AND COSTS" shall mean the fees and expenses of counsel to the
parties hereto, which may include printing, photostating, duplicating and other
expenses, air freight charges, and fees billed for law clerks, paralegals and
other persons not admitted to the bar but performing services under the
supervision of an attorney, and the costs and fees incurred in connection with
the enforcement or collection of any judgment obtained in any such proceeding.
The provisions

                                       11

 
of this Section 8 shall survive the Redemption Distribution and the entry of any
        ---------
judgment, and shall not merge, or be deemed to have merged, into any judgment.

          9.   SURVIVAL.  This Agreement and the obligations of the parties
               --------                                                    
hereto shall survive the redemption of the PIC Interest.

          10.  SUCCESSORS.  This Agreement and all the terms and provisions
               ----------                                                  
hereof shall be binding upon and shall inure to the benefit of all parties
hereto, and their legal representatives, successors and permitted assigns,
except as expressly herein otherwise provided.

          11.  EFFECT AND INTERPRETATION.  This Agreement shall be governed by
               -------------------------                                      
and construed in conformity with the laws of the State of California.

          12.  COUNTERPARTS.  This Agreement may be executed in any number of
               ------------                                                  
counterparts, each of which shall be deemed an original, but all of which when
taken together shall constitute one and the same instrument.  The signature page
of any counterpart may be detached therefrom without impairing the legal effect
of the signature(s) thereon provided such signature page is attached to any
other counterpart identical thereto except having additional signature pages
executed by other parties to this Agreement attached thereto.

          13.  AMENDMENTS.  Except as otherwise provided herein, this Agreement
               ----------                                                      
may not be changed, modified, supplemented or terminated, except by an
instrument in writing executed by the party(ies) hereto which is/are or will be
affected by the terms of such change, modification, supplement or termination,
or executed by the party(ies) authorized to act on behalf of the party(ies) so
affected.

          14.  TIME OF THE ESSENCE.  Time is of the essence of every term and
               -------------------                                           
provision of this Agreement.

          15.  SEVERABILITY.  If any provision of this Agreement, or the
               ------------                                             
application of such provision to any Person or circumstance, shall be held
invalid by a court of competent jurisdiction, the remainder of this Agreement,
or the application of such provision to Persons or circumstances other than
those to which it is held invalid by such court, shall not be affected thereby.

          16.  EXHIBITS.  Exhibits A through B attached hereto are incorporated
               --------   ----------         -                                 
herein by this reference.

          17.  ENTIRE AGREEMENT.  This Agreement and the other Transaction
               ----------------                                           
Documents are the entire agreement between the parties with respect to the
subject matter hereof and supersede all prior agreements and negotiations.

          18.  AUTHORITY.  Each individual and entity executing this Agreement
               ---------                                                      
hereby represents and warrants that he, she or it has the capacity set forth on
the signature pages hereof 

                                      12

 
with full power and authority to bind the party on whose behalf he, she or it is
executing this Agreement to the terms hereof.

          19.  INCONSISTENCIES WITH PARTNERSHIP AGREEMENT.  If and to the extent
               ------------------------------------------                       
that any terms or provisions of this Agreement are inconsistent with any terms
or provisions of the Partnership Agreement, the terms and provisions of this
Agreement shall govern and control.

          20.  CONSENT TO JURISDICTION AND SERVICE OF PROCESS.  ALL JUDICIAL
               ----------------------------------------------               
PROCEEDINGS BROUGHT AGAINST ANY PARTY HERETO ARISING OUT OF OR RELATING TO THIS
AGREEMENT MAY BE BROUGHT IN ANY STATE OR FEDERAL COURT OF COMPETENT JURISDICTION
IN THE STATE OF CALIFORNIA, AND BY EXECUTION AND DELIVERY OF THIS AGREEMENT EACH
PARTY HERETO ACCEPTS FOR ITSELF, GENERALLY AND UNCONDITIONALLY, THE NONEXCLUSIVE
JURISDICTION OF THE AFORESAID COURTS AND WAIVES ANY DEFENSE OF FORUM NON
CONVENIENS AND IRREVOCABLY AGREES TO BE BOUND BY ANY JUDGMENT RENDERED THEREBY
IN CONNECTION WITH THIS AGREEMENT.  Each party hereby agrees that service of all
process in any such proceeding in any such court may be made by registered or
certified mail, return receipt requested, to any party hereto, at its address
provided in this Agreement, such service being hereby acknowledged by each party
to be sufficient for personal jurisdiction in any action against such party in
any such court and to be otherwise effective and binding service in every
respect.  Nothing herein shall affect the right to serve process in any other
manner permitted by law.

          21.  WAIVER OF JURY TRIAL.  EACH OF THE PARTIES TO THIS AGREEMENT
               --------------------                                        
HEREBY AGREES TO WAIVE ITS RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR
CAUSE OF ACTION BASED UPON OR ARISING OUT OF THIS AGREEMENT OR THE SUBJECT
MATTER OF THIS AGREEMENT.  The scope of this waiver is intended to be all-
encompassing of any and all disputes that may be filed in any court and that
relate to the subject matter of this Agreement, including, without limitation,
contract claims, tort claims, breach of duty claims and all other common law and
statutory claims.  Each party hereto acknowledges that this waiver is a material
inducement to enter into a business relationship, that each has already relied
on this waiver in entering into this Agreement, and that each shall continue to
rely on this waiver in their related future dealings.  Each party hereto further
warrants and represents that is has reviewed this waiver with its legal counsel
and that it knowingly and voluntarily waives its jury trial rights following
consultation with such legal counsel.  THIS WAIVER IS IRREVOCABLE, MEANING THAT
IT MAY NOT BE MODIFIED EITHER ORALLY OR IN WRITING, AND THIS WAIVER SHALL APPLY
TO ANY SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS OR MODIFICATIONS TO THIS
AGREEMENT.  In the event of litigation, this Agreement may be filed as a written
consent to a trial by the court.


                           [SIGNATURES ON NEXT PAGE]

                                      13

 
          IN WITNESS WHEREOF, each of the parties hereto has executed this
Agreement as of the date and year first written above.

PARTNERSHIP:             EMBARCADERO CENTER ASSOCIATES,
                         a California general partnership

                         By:  BOSTON PROPERTIES LLC,
                              a Delaware limited liability company,
                              as Managing General Partner

                              By:   BOSTON PROPERTIES LIMITED
                                    PARTNERSHIP, a Delaware limited
                                    partnership, as Manager

                                    By:  BOSTON PROPERTIES, INC.,
                                         a Delaware corporation,
                                         as General Partner



                                         By: /s/ Thomas J. O'Connor
                                            -------------------------
                                         Name: Thomas J. O'Connor
                                         Title: Vice President


BPLLC:                   BOSTON PROPERTIES LLC,
                         a Delaware limited liability company

                         By:  BOSTON PROPERTIES LIMITED
                              PARTNERSHIP, a Delaware limited
                              partnership, as Manager

                              By:   BOSTON PROPERTIES, INC.,
                                    a Delaware corporation,
                                    as General Partner



                                    By: /s/ Thomas J. O'Connor
                                       -------------------------
                                    Name: Thomas J. O'Connor
                                    Title: Vice President
 
                      
                      [SIGNATURES CONTINUED ON NEXT PAGE]

                                      S-1

 
HOLDINGS LLC:            BP EC2 HOLDINGS LLC,
                         a Delaware limited liability company

                         By:  BOSTON PROPERTIES LIMITED
                              PARTNERSHIP, a Delaware limited
                              partnership, as Manager

                              By:   BOSTON PROPERTIES, INC.,
                                    a Delaware corporation,
                                    as General Partner



                                    By: /s/ Thomas J. O'Connor
                                       -------------------------
                                    Name: Thomas J. O'Connor
                                    Title: Vice President
 
 
PIC:                     PIC REALTY CORPORATION,
                         a Delaware corporation



                         By: /s/ Gary L. Frazier
                            -----------------------------------
                         Name: ________________________________
                         Title: _______________________________

                                      S-2

 
                                   EXHIBIT A

                               DETERMINATION OF
                     FAIR MARKET VALUE OF INVESTMENT NOTES
                     -------------------------------------


     The Fair Market Value of each Investment Note shall equal the aggregate
Remaining Cash Flow for such Investment Note discounted from each respective
scheduled payment due date to the Redemption Date at a discount factor equal to
the Discount Rate for such Investment Note. Notwithstanding the foregoing, if on
the Determination Date an Investment Loan Borrower Credit Event exists, then the
Managing Partner shall appoint an investment banking firm of national
recognition (which will be satisfactory to PIC in its reasonable discretion) to
determine the change in the Fair Market Value of the Investment Notes for
purposes of this Agreement.  In the event that an investment banking firm is
appointed to determine the change in the Fair Market Value of any Investment
Note as of the Determination Date pursuant to the preceding sentence, such
investment banking firm shall be instructed to determine the change in the Fair
Market Value of such Investment Note based on the following four factors: (i)
changes in market interest rates since the date of funding of the Investment
Note, (ii) the time period remaining from the Determination Date until the
earlier of the next Rate Reset Date of such Investment Note and the maturity of
the Investment Note, (iii) the Remaining Cash Flow (as defined below) of the
Investment Note, and (iv) changes in the credit quality of the Investment Note
since the date of funding thereof.  The parties agree that an acceptable
investment banking firm would be Goldman Sachs or Merrill Lynch & Company.  As
used herein, the term "INVESTMENT LOAN BORROWER CREDIT EVENT" shall mean any of
the following events: (x) the credit rating of the Investment Notes has been
downgraded from the credit rating of the Investment Notes on the date hereof by
both of the Rating Agencies, or (y) in the reasonable discretion of the Managing
Partner, there has been, as compared to the date hereof, a material diminution
or degradation in the value of the assets of the Investment Loan Borrower, or
the ability of the Investment Loan Borrower to pay its outstanding obligations,
as they become due from the date hereof.

                                 Defined Terms
                                 -------------

     As used herein, the following terms shall have the following meanings:

     "DETERMINATION DATE" shall mean the date upon which the Fair Market Value
of the Investment Notes is determined and shall occur at noon (New York City
time) on the third business day after the date that the PIC Redemption Notice or
Partnership Redemption Notice, as the case may be, is received by the addressee
thereof.

     "DISCOUNT RATE" shall mean the Reinvestment Rate plus the Margin.

     "MARGIN" shall mean, with respect to any Investment Note, the Margin then
in effect (as defined in the Investment Loan Note Purchase Agreement) of such
Investment Note.

                                      A-1

 
     "RATING AGENCIES" shall mean Fitch IBCA, Inc. and Standard and Poor's
Corporation.

     "REINVESTMENT RATE" shall mean, with respect to any Investment Note, the
offered-side yield to maturity as of the Determination Date of the U.S. Treasury
security that was used to determine the then Treasury of such Investment Note.
Such offered-side yield to maturity shall be determined on or about noon on the
Determination Date and PIC and the Partnership shall cooperate in the
determination of such Reinvestment Rate.

     "REMAINING CASH FLOW" shall mean, for any Investment Note, the aggregate
amount of all accrued and unpaid interest, principal and other payments under
such Investment Note on the Redemption Date and all principal, interest and
other payments that will become due and owing under such Investment Note from
time to time from and after the Redemption Date through (x) the next Rate Reset
Date of such Investment Note (the "NEXT RESET DATE"), if the Fair Market Value
is determined prior to such Rate Reset Date, or (y) the maturity of such
Investment Note (including, without limitation, any balloon or other principal
payments due and owing on said maturity date), if the Fair Market Value is
determined after all Rate Reset Dates provided in such Investment Note, as each
such payment would become due and payable pursuant to the terms of the
applicable Investment Note and the Investment Loan Documents (but assuming, if
                                                                              
clause (x) above applies, that any interest that is scheduled to be accrued but
- ----------                                                                     
unpaid as of the Next Reset Date (i.e., because the interest payment date with
                                  ----                                        
respect thereto will not have occurred), and any outstanding principal and any
other amounts scheduled to be owing under the Investment Note on such Next Reset
Date, will be repaid in full on the Next Reset Date; and further assuming, for
purposes of calculating all future interest payments due under such Investment
Note, that the interest rate in effect with respect to the Investment Note on
the Redemption Date will remain constant for purposes of determining the Fair
Market Value of such Investment Note).

                                      A-2

 
                                   EXHIBIT B

                                  CERTIFICATE
                           REGARDING INVESTMENT LOAN
                           -------------------------

          THIS CERTIFICATE (this "CERTIFICATE") is made and dated as of
____________, 1998 by EMBARCADERO CENTER ASSOCIATES, a California general
partnership ("PARTNERSHIP"), for the benefit of PIC REALTY CORPORATION, a
Delaware corporation ("PIC").

          Pursuant to that certain Redemption Agreement dated as of November 12,
1998 (the "REDEMPTION AGREEMENT"), the Partnership (and its partners other than
PIC) and PIC have been granted certain rights to cause PIC's interest in the
Partnership to be fully redeemed in exchange for the distribution of all or a
portion of the Investment Notes and, if applicable pursuant to the terms and
provisions of the Redemption Agreement, cash to PIC.  All capitalized terms used
herein without definition shall have the respective meanings given such terms in
the Redemption Agreement.

          Concurrently herewith and on the date hereof, the Partnership is
distributing the Investment Notes (or a portion thereof) to PIC in accordance
with the applicable terms and provisions of the Redemption Agreement.

          With respect to the distribution of such Investment Notes, the
Partnership hereby represents and warrants to PIC as of the date hereof as
follows:

          (a) Subject to the rights of The Prudential Insurance Company of
America or a permitted assignee or designee ("OPTIONEE") under that certain
Option and Put Agreement dated as of November 12, 1998 (the "OPTION AGREEMENT"),
the Partnership is the sole owner of the Investment Notes.  Further, the
Investment Notes delivered to PIC on the date hereof pursuant to the Redemption
Agreement are free and clear of all liens and third party interests of any kind
or nature other than the interests and rights of Optionee under the Option
Agreement.  The Partnership has not amended, modified, terminated or otherwise
by written agreement altered the Investment Notes or the Investment Loan
Documents except as specifically disclosed to PIC in writing prior to the date
hereof and except for the division of any Investment Note pursuant to Section
2(a) of the Redemption Agreement.

          (b) The Partnership has not assigned or transferred the Investment
Notes or any of the Investment Loan Documents (except to secure the Equity
Redemption Loan, which assignment has been or simultaneously herewith is being,
released in full in writing), nor are there any agreements to assign or convey
any portion of the Investment Notes or such Investment Loan Documents to any
Person other than PIC and Optionee (in accordance with the Option Agreement).

                                      B-1

 
          (c) The Partnership has all requisite power and authority to execute
and deliver all instruments and other documents to be executed and delivered by
the Partnership in connection with the distribution of the Investment Notes to
PIC on the date hereof and to execute this Certificate.

          (d) The Partnership is a duly formed general partnership under the
laws of the State of California, and is legally authorized to execute, deliver
and perform the Redemption Distribution and this Certificate, and this
Certificate is legal, valid and binding on the Partnership enforceable against
it in accordance with its terms, except to the extent that enforcement may be
limited by applicable bankruptcy, insolvency, moratorium and other principles
relating to or limiting the rights of contracting parties generally.

          (e) The execution of this Certificate and the performance of the
Redemption Distribution by the Partnership will not conflict with or result in a
breach of any statute, rule, regulation, judgment, decree or order of any court,
board, committee or governmental agency to which the Partnership is subject, nor
violate any agreement or contract to which the Partnership is a party or by
which the Partnership is bound.  No consent, approval, authorization or order of
any court or governmental agency or body is required for the execution, delivery
and performance by the Partnership of, or compliance by the Partnership with,
the Certificate or the consummation of the Redemption Distribution, except for
such consents, approvals, authorizations or orders, if any, that have been
obtained.

          Each of the foregoing representations and warranties are personal to
PIC and no Person other than PIC shall be entitled to bring any action based
thereon.  Each of the foregoing representations and warranties shall survive the
consummation of the Redemption Distribution.

          The Partnership hereby acknowledges that the acceptance of the
Redemption Distribution and the Investment Notes by PIC was made and will have
been made in material reliance by PIC on the aforestated representations and
warranties of the Partnership.


                           [SIGNATURES ON NEXT PAGE]

                                      B-2

 
          IN WITNESS WHEREOF, the Partnership has caused its duly authorized
representative to execute this Certificate as of the date first above written.

PARTNERSHIP:             EMBARCADERO CENTER ASSOCIATES,
                         a California general partnership

                         By:  BOSTON PROPERTIES LLC,
                              a Delaware limited liability company,
                              as Managing General Partner

                              By:   BOSTON PROPERTIES LIMITED
                                    PARTNERSHIP, a Delaware limited
                                    partnership, as Manager

                                    By:  BOSTON PROPERTIES, INC.,
                                         a Delaware corporation,
                                         as General Partner



                                         By:__________________________
                                         Name:________________________
                                         Title:_______________________
 
                                      B-2

 
                                                                   EXHIBIT 99.17

                             REDEMPTION AGREEMENT


          THIS REDEMPTION AGREEMENT (this "AGREEMENT") dated as of November 12,
1998, is made and entered into by and among THREE EMBARCADERO CENTER VENTURE, a
California general partnership ("PARTNERSHIP"), BOSTON PROPERTIES LLC, a
Delaware limited liability company ("BPLLC"), BP EC3 HOLDINGS LLC, a Delaware
limited liability company ("HOLDINGS LLC"), and THE PRUDENTIAL INSURANCE COMPANY
OF AMERICA, a New Jersey corporation ("PRUDENTIAL").


                                R E C I T A L S
                                - - - - - - - -

          A.   Pursuant to that certain Master Transaction Agreement dated as of
September 28, 1998, by and among Boston Properties Limited Partnership, Boston
Properties, Inc., PIC Realty Corporation, a Delaware corporation, Prudential,
Fedmark Corporation, Embarcadero Center Investors Partnership, Pacific Property
Services, L.P. and certain other persons listed on Exhibit A thereto (the
"MASTER TRANSACTION AGREEMENT"), BPLLC, Holdings LLC and Prudential have become
the sole partners of the Partnership, which Partnership is currently governed by
that certain Second Amended and Restated Partnership Agreement of Three
Embarcadero Center Venture of even date herewith (the "PARTNERSHIP AGREEMENT").
All capitalized terms used herein without definition shall have the respective
meanings given such terms in the Partnership Agreement.

          B.   Prudential desires to acquire the right to have its entire
interest in and to the Partnership (the "PRUDENTIAL INTEREST") redeemed by the
Partnership at any time from and after the date hereof in accordance with the
terms and provisions of this Agreement below, and BPLLC and Holdings LLC desire
to acquire the right to cause the Prudential Interest to be redeemed by the
Partnership at any time after the date which is ninety (90) days after the date
hereof in accordance with the terms and provisions of this Agreement below, all
as hereinafter provided.

          C.   In connection with the redemption transactions described in
Recital B above, the parties hereto desire to make certain additional covenants
- ---------                                                                      
and agreements as hereinafter set forth.

          NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged by the parties hereto, the parties
hereby agree as follows:

          1.   REDEMPTION EVENT.
               ---------------- 

          (A)  The Prudential Interest shall be fully redeemed by the
Partnership in the manner provided in Section 2 below in the event that a
                                      ---------
Prudential Redemption Notice is duly given

                                       1

 
to BPLLC or any other Person who is then the managing partner of the Partnership
(the "MANAGING PARTNER") in accordance with subsection (b) below or a
                                            -------------- 
Partnership Redemption Notice is duly given to Prudential by BPLLC or Holdings
LLC (on behalf of the Partnership) in accordance with subsection (c) below.
                                                      --------------       

          (B)  At any time after the date hereof, Prudential may elect to have
the Prudential Interest fully redeemed by the Partnership in accordance with
Section 2 below by giving written notice (a "PRUDENTIAL REDEMPTION NOTICE") to
- ---------                                                                     
the Managing Partner stating that Prudential is electing to have the Prudential
Interest fully redeemed pursuant to this Agreement; provided that,
                                                    -------- ---- 
notwithstanding the foregoing, Prudential's right to give a Prudential
Redemption Notice and to be redeemed at its election shall be suspended during
any period of time while there exists an Investment Loan Borrower Credit Event
(as defined in Exhibit A attached hereto).  A Prudential Redemption Notice shall
               ---------                                                        
only be effective if simultaneously with the giving of such notice (x) PIC
Realty Corporation delivers a similar notice with respect to the Redemption
Agreements of even date herewith to which PIC and One Embarcadero Center Venture
and Embarcadero Center Associates are parties, respectively, (y) Prudential
delivers a similar notice with respect to the Redemption Agreement of even date
herewith to which Prudential and Four Embarcadero Center Venture are parties
(such similar notices of PIC and Prudential, the "CORRESPONDING NOTICES"), and
(z) each Corresponding Notice specifies the same Redemption Date as is specified
in the Prudential Redemption Notice.

          (C)  At any time on or after the date which is five (5) business days
prior to the date which is ninety (90) days after the date hereof (i.e., such
                                                                   ----      
that the Redemption Date selected by BPLLC or Holdings LLC shall not occur prior
to the date which is ninety (90) days after the date hereof), either BPLLC or
Holdings LLC may elect to have the Partnership fully redeem the Prudential
Interest in accordance with Section 2 below by giving written notice (the
                            ---------                                    
"PARTNERSHIP REDEMPTION NOTICE") to Prudential stating that the Partnership is
electing to have the Prudential Interest fully redeemed pursuant to this
Agreement; provided that, notwithstanding the foregoing, BPLLC's and Holding
           -------- ----                                                    
LLC's right to give a Partnership Redemption Notice and to cause the Partnership
to redeem the Prudential Interest at either of their elections shall be
suspended during any period of time while any of the Investment Notes have been
accelerated and such acceleration has not been rescinded by the holder(s) of
such Investment Notes.

          (D)  As used herein, the following terms shall have the following
meanings:

          "AMORTIZED LEASING COSTS" shall mean, for any period, the sum of the
amortized portion of all Investor Leasing Costs (as defined in the Master
Transaction Agreement) and New Leasing Costs for such period, it being
acknowledged and agreed that all such Investor Leasing Costs and New Leasing
Costs shall be amortized on a straight-line basis monthly over the base term of
the applicable lease commencing on the rent commencement date for such lease,
plus interest on the unamortized portion of all Investor Leasing Costs and New
- ----                                                                          
Leasing Costs outstanding from time to time during such period at the rate of
ten percent (10%) per annum.

                                       2

 
          "BROKEN LIBOR COST" shall mean the extra payment which the Partnership
must make on account of repaying the Equity Redemption Loan on a date other than
the end of an "interest period" because the Redemption Date falls on a date
other than the end of an "interest period" (it being acknowledged and agreed by
the parties hereto that, if the Redemption Date falls on a date which is the end
of an "interest period", there shall be no Broken LIBOR Cost for purposes of
this Agreement).  The Managing Partner shall, at the request of Prudential,
provide Prudential with a schedule showing the end of all "interest periods" for
purposes of timing the Redemption Distribution and Prudential may rely on such
schedule for purposes of designating a Redemption Date.

          "FAIR MARKET VALUE OF THE INVESTMENT NOTES" shall be determined
pursuant to and in accordance with the terms and provisions of Exhibit A
                                                               ---------
attached hereto.

          "FAIR MARKET VALUE OF THE PRUDENTIAL INTEREST" shall equal, on the
Redemption Date, the sum of $66,688,976 (which amount equals Prudential's
Percentage Interest immediately prior to the Redemption Distribution multiplied
by the NMV (defined in the Master Transaction Agreement) of the Property as of
the date hereof, adjusted to:

          (i)   add an amount equal to the product of Prudential's Percentage
                ---                                                          
     Interest immediately prior to the Redemption Distribution, multiplied by
                                                                ---------- --
     any Unrealized Gain (defined below), if any, on the Investment Notes as of
     the Determination Date (described in Exhibit A attached hereto) or deduct
                                          ---------                     ------
     an amount equal to the product of Prudential's Percentage Interest
     immediately prior to the Redemption Distribution, multiplied by any
                                                       ---------- --    
     Unrealized Loss (defined below), if any, on the Investment Notes as of the
     Determination Date;

          (ii)  deduct all distributions (other than the Redemption Distribution
                ------                                                          
     and any distribution of OP Units) actually made by the Partnership to (and
     received by) Prudential from and after the date hereof through and
     including the Redemption Date;

          (iii) add any Capital Contributions made by Prudential from and after
                ---                                                            
     the date hereof through and including the Redemption Date;

          (iv)  add an amount equal to the product of Prudential's Percentage
                ---                                                          
     Interest immediately prior to the Redemption Distribution, multiplied by
                                                                ---------- --
     the estimated Operating Profits, if any, for the period from and after the
     date hereof through and including the Redemption Date or deduct an amount
                                                              ------          
     equal to Prudential's Percentage Interest immediately prior to the
     Redemption Distribution, multiplied by the estimated Operating Losses, if
                              ---------- --                                   
     any, for the period from and after the date hereof through and including
     the Redemption Date;

          (v)   deduct an amount equal to the unamortized portion of all
                ------                                                  
     Interest Rate Approved Loan Costs with respect to the Prudential Guarantied
     Loan (which Prudential 

                                       3

 
     Guarantied Loan will be assumed by Prudential in connection with the
     Redemption Distribution);

          (vi)   add an amount equal to Prudential's Percentage Interest in the
                 ---                                                           
     Partnership immediately prior to the Redemption Distribution multiplied by
     all cash distributions or cash proceeds ("MTA PROCEEDS") actually received
     by the Partnership from Two Embarcadero Center West and Three Embarcadero
     Center West from and after the date hereof; and

          (vii)  subtract an amount equal to the Broken Libor Cost (if any); and
                 --------                                                       

          (viii) add an amount equal to the difference between the NEV (as
                 ---                                                      
     defined in the Master Transaction Agreement) of the Property minus the NMV
     of the Property (if such difference is a positive number) or subtract an
                                                                  --------   
     amount equal to the difference between the NMV of the Property minus the
     NEV of the Property (if the difference is a positive number); provided
                                                                   --------
     that, if as of the Redemption Date, the Adjusted NEV (as defined in the
     ----                                                                   
     Master Transaction Agreement) shall have been determined in accordance with
     Exhibit V of the Master Transaction Agreement, then in lieu of the
     adjustment provided for in this clause (viii) above, an adjustment shall be
                                     -------------                              
     made to add an amount equal to the Revised NEV (defined immediately below)
             ---                                                               
     of the Property minus the NMV of the Property (if such difference is a
     positive number) or subtract an amount equal to the NMV of the Property
                         --------                                           
     minus the Revised NEV of the Property (if such difference is a positive
     number).  As used herein, the "REVISED NEV OF THE PROPERTY" shall mean an
     amount equal to the sum of the NEV of the Property plus or minus, as the
     case may be, the adjustment made to the NEV pursuant to Section V-9-1 of
     Exhibit V to the Master Transaction Agreement.

For purposes of determining estimated Operating Profits or Operating Losses
hereunder, the Managing Partner shall provide Prudential with its calculation of
estimated Operating Profits or Operating Losses prior to the Redemption
Distribution, which calculation shall be subject to Prudential's approval (not
to be unreasonably withheld or delayed), and the Partnership and Prudential
shall thereafter make any necessary adjustments to said calculation as complete
information becomes available within thirty (30) days after the Redemption Date
in accordance with the terms and provisions of Section 2(e) below.
                                               ------------       

          "LEASING COSTS" shall mean any and all (i) tenant improvement
allowances, move-in allowances, brokerage commissions, expenses incurred or to
be incurred for repairs, improvements, equipment, painting, decorating,
partitioning and other items to satisfy the tenant's requirements for the
commencement of the applicable lease, (ii) the cost of removal and/or abatement
of asbestos or other hazards or toxic substances located in the demised space in
violation of law and as required in order to satisfy the tenant's requirements
for the commencement of the applicable lease, (iii) rent concessions as stated
in the respective lease (and applicable lease documents) relating to the demised
space provided the tenant has the right to take possession of such demised space
during the period of such rent concessions, (iv) base building 

                                       4

 
modifications required by the applicable lease, and (v) expenses incurred or to
be incurred for the purpose of satisfying or terminating the obligations of a
tenant to the landlord under another lease.

          "OP UNITS" shall mean a number Series Three Preferred Units in Boston
Properties Limited Partnership equal to the product of (i) Prudential's
Percentage Interest in the Partnership immediately prior to the "Closing" under
the Master Transaction Agreement, multiplied by (ii) the total number of Series
                                  ---------- --                                
Three Preferred Units in Boston Properties Limited Partnership actually received
by the Partnership from Two Embarcadero Center West and Three Embarcadero Center
West.

          "NEW LEASING COSTS" shall mean all Leasing Costs incurred by the
Partnership in connection with any new Leases executed after the date hereof and
prior to the Redemption Date.

          "OPERATING ASSETS" shall mean all real property, improvements, leases,
licenses, fixtures and tangible and intangible personal property owned by the
Partnership on the date hereof other than cash, deposit accounts and money.

          For any period, "OPERATING PROFITS" shall mean the absolute value of
the following amount (if positive) and "OPERATING LOSSES" shall mean the
absolute value of the following amount (if negative): net income (loss) of the
Partnership for such period determined in accordance with GAAP without giving
effect to extraordinary gains (or losses) or any taxes on or measured by such
net income or loss, plus the sum of (i) all amortization and depreciation
                    ----                                                 
expense and other non-cash expenses (it being acknowledged by the parties hereto
that principal payments on account of debt and capital expenditures other than
those amortized during any period for which net income (loss) is being
determined are not taken into account or deducted when calculating net income
(loss) under GAAP), (ii) all Leasing Costs that are not treated as capital
expenditures under GAAP, (iii) all interest expense of the Partnership on loans
made by any BP Partner under the Partnership Agreement (which loans are
evidenced by a BP Note) and (iv) all fees, costs and expenses (other than
interest expense) incurred by the Partnership or any Partner in connection with
any Partnership loan which were deducted as an expense (rather than amortized)
other than non-amortizable fees, costs and expenses for Approved Loan Costs and
non-amortizable Excess Proceeds Borrowing Costs, minus the Amortized Leasing
                                                 -----                      
Costs for such period and the amortized portion of the Approved Loan Costs and
the Excess Proceeds Borrowing Costs for such period. Operating Profits and
Losses for any partial month shall be prorated on the basis of the actual number
of days of such month and a 365-day year.

          "REDEMPTION AMOUNT" shall equal (i) the Fair Market Value of the
Prudential Interest on the Redemption Date, plus (ii) the outstanding principal
                                            ----                               
balance of the Prudential Guarantied Loan assumed by Prudential on the
Redemption Date in connection with the distribution of the Investment Notes to
Prudential, together with all accrued but unpaid interest on the Prudential
Guarantied Loan as of such date.

                                       5

 
          "REDEMPTION DATE" shall mean the earlier of (x) the date specified in
a Prudential Redemption Notice given by Prudential to the Managing Partner
                                                                          
(provided that such date shall be at least five (5) business days after the
- --------- ----                                                             
giving of such Prudential Redemption Notice), and (y) the date specified in a
Partnership Redemption Notice given by BPLLC or Holdings LLC to Prudential
(provided that such date shall be at least five (5) business days after the
- --------- ----                                                             
giving of such Partnership Redemption Notice).

          "UNREALIZED GAIN" shall mean the excess (if any) of (x) the aggregate
Fair Market Value of all Investment Notes (provided that, in calculating the
Fair Market Value of the Investment Notes for purposes of determining Unrealized
Gain, the accrued and unpaid interest thereunder as of the Redemption Date shall
not be added to the Remaining Cash Flow), minus (y) the aggregate face amounts
                                          -----                               
of all Investment Notes.

          "UNREALIZED LOSS" shall mean the excess (if any) of (A) the aggregate
face amounts of all Investment Notes minus (B) the aggregate Fair Market Value
                                     -----                                    
of all Investment Notes (provided that, in calculating the Fair Market Value of
the Investment Notes for purposes of determining Unrealized Loss, the accrued
and unpaid interest thereunder as of the Redemption Date shall not be added to
the Remaining Cash Flow).

          2.   REDEMPTION DISTRIBUTION.
               ----------------------- 

          (A)  On the Redemption Date the Partnership shall distribute to
Prudential, as a "REDEMPTION DISTRIBUTION" in full redemption of the Prudential
Interest, (i) the Partnership's entire right, title and interest in, to and
under the Investment Notes (subject to the Prudential Guarantied Loan) and all
rights in, to and under the other instruments and agreements relating to the
Investment Loan (collectively, the "INVESTMENT LOAN DOCUMENTS") (provided that,
                                                                 -------- ---- 
the Partnership shall retain all claims, rights, obligations and liabilities
under the Investment Loan Documents accruing prior to the Redemption Date
(except the right to any accrued and unpaid interest under the Investment Notes
distributed to Prudential as of the Redemption Date, which shall be paid to
Prudential after the Redemption Date and which is included and accounted for in
the calculation of the Fair Market Value of the Investment Notes pursuant to
Exhibit A attached hereto), and if the Partnership retains any Remainder Notes
- ---------                                                                     
pursuant to the provisions of this Section 2(a) below, the Partnership shall
                                   ------------                             
retain all rights, obligations and liabilities under the Investment Loan
Documents relating to such Remainder Notes, if any, retained by the Partnership
(both accruing prior to and after the Redemption Date), (ii) if the Redemption
Amount exceeds the aggregate Fair Market Value of the Investment Notes, cash in
an amount equal to the difference between the Redemption Amount and the
aggregate Fair Market Value of the Investment Notes, and (iii) if and to the
extent that the Partnership has not already distributed to Prudential the OP
Units, the OP Units.  Notwithstanding the foregoing, if the aggregate Fair
Market Value of all Investment Notes on the Redemption Date exceeds the
Redemption Amount on such date, then (A) on the Redemption Date the Partnership
shall assign to Prudential its entire interest in only such Investment Notes (in
the order provided in the next sentence) that collectively have an aggregate
Fair Market Value at the time of such assignment equal to the Redemption 

                                       6

 
Amount, and (B) the Partnership shall cause any individual Investment Note which
is only partially assigned to Prudential in accordance with the next sentence to
be replaced by the issuer thereof with two notes in accordance with the terms
and provisions of the next sentence. In connection with the distribution of
Investment Notes pursuant to the immediately preceding sentence, the Partnership
shall distribute to Prudential those Investment Notes with the latest maturity
dates one by one beginning with the Investment Note with the latest maturity
date and then the Investment Note with the next latest maturity date and so
forth until the total Fair Market Value of all Investment Notes distributed to
Prudential equals the Redemption Amount; provided that, if necessary in order to
                                         -------- ----                          
distribute to Prudential Investment Notes with a Fair Market Value exactly equal
to the Redemption Amount, the last Investment Note to be distributed will be
divided into two notes collectively having an aggregate principal amount equal
to such original Investment Note and otherwise having identical terms, so that
one of such notes (when taken together with the other Investment Notes
distributed to Prudential in accordance with the order of priority set forth
hereinabove) will have a Fair Market Value equal to the Redemption Amount and
such note shall be assigned to Prudential by the Partnership.  If less than all
of the Investment Notes are assigned to Prudential in connection with the
Redemption Distribution as provided above, the Investment Note(s) retained by
the Partnership shall be collectively referred to herein as the "REMAINDER
NOTES".

          (B) Concurrently with the Redemption Distribution, the Partnership
shall execute and deliver to Prudential an Investment Loan Certificate in the
form of Exhibit B attached hereto without modification.
        ---------                                      

          (C) Concurrently with the Redemption Distribution, the Partnership
shall assign to Prudential, and Prudential shall accept and assume, the
Prudential Guarantied Loan and all instruments and agreements relating thereto,
and Prudential shall thereafter be subject to all claims, rights, obligations
and liabilities thereunder accruing from and after the Redemption Date (except
that Prudential shall also assume and be subject to the obligation to pay all
accrued but unpaid interest under such Prudential Guarantied Loan as of and
including the Redemption Date to the extent the same has not yet become due and
payable under the Prudential Guarantied Loan Documents); and the lender under
such documents shall release the Partnership, in a writing delivered to the
Partnership, from all claims, rights, obligations and liabilities thereunder
accruing from and after the Redemption Date and from the obligation to pay any
accrued and unpaid interest under such Prudential Guarantied Loan as of and
including the Redemption Date to the extent such interest payment has not yet
become due and payable under the Prudential Guarantied Loan Documents.

          (D) It shall be a condition precedent to the consummation of the
transactions described in subsections (a), (b) and (c) above that all occur
                          ---------------  ---     ---                     
simultaneously.

          (E) Within thirty (30) days after the end of the calendar month in
which the Redemption Date occurs, the Partnership and Prudential shall obtain
all necessary and complete information regarding the Operating Profits or
Operating Losses of the Partnership accruing from 

                                       7

 
the date hereof through and including the Redemption Date and shall agree upon
and make any necessary adjustments to the estimated Operating Profits or
Operating Losses of the Partnership which were utilized in calculating the Fair
Market Value of the Prudential Interest on the Redemption Date. If, after making
such adjustments, the actual Operating Profits of the Partnership are greater
than the estimated Operating Profits utilized to determine the Fair Market Value
of the Prudential Interest on the Redemption Date, or the actual Operating
Losses are less than the estimated Operating Losses, as the case may be, then
the Partnership shall promptly make a cash payment to Prudential equal to the
difference. If, after making such adjustments, the actual Operating Profits of
the Partnership are less than the estimated Operating Profits utilized to
determine the Fair Market Value of the Prudential Interest on the Redemption
Date, or the actual Operating Losses are greater than the estimated Operating
Losses, as the case may be, then Prudential shall promptly make a cash payment
to the Partnership equal to the difference. In addition to the foregoing, if the
Adjusted NEV of the Property has not been determined pursuant to Exhibit V of
the Master Transaction Agreement as of the Redemption Date, then promptly
following such determination of Adjusted NEV of the Property, if any, pursuant
to said Exhibit V, if the Revised NEV of the Property exceeds the NEV of the
Property, the Partnership shall pay to Prudential, in cash, a sum equal to such
difference, and if the NEV of the Property exceeds the Revised NEV of the
Property, then Prudential shall pay to the Partnership, in cash, a sum equal to
such difference.

          3.   COVENANTS; INDEMNITIES.
               ---------------------- 

          (A)  BPLLC, Holdings LLC, Prudential and the Partnership (on behalf of
themselves and their respective successors and assigns) each hereby covenants
and agrees with each other that, during the period of time from the date hereof
through and including the second (2nd) anniversary of the Redemption Date, (i)
none of the Equity Redemption Loan obtained by the Partnership on the date
hereof pursuant to the terms of the Partnership Agreement or any debt replacing
any such Equity Redemption Loan in accordance with the terms and provisions of
the Partnership Agreement, shall be repaid by any Capital Contributions made by
any Partner of the Partnership, (ii) the Partnership shall at all times maintain
and continue its existence as a general partnership under the laws of the State
of California and shall not be dissolved, wound-up or terminated during such
period of time, and (iii) except as otherwise expressly provided in this
Agreement, the Partnership shall not distribute all or any portion of its
Operating Assets to any Partner.  Each of the afore-mentioned Persons (on behalf
of themselves and their Affiliates) hereby covenants not to commit any act in
violation of this covenant (or to permit any successor or assign of any such
Person to commit any such act).

          (B)  In addition to, and not in limitation of, any other rights and
remedies available to the parties hereto under this Agreement or at law or in
equity, each party hereto (on behalf of itself) agrees that, in the event of a
breach by any party or its Affiliate (such party, the "breaching party") of any
of the covenants set forth in subsection (a) above, such breaching party shall
                              --------------                                  
indemnify, protect, defend and hold harmless the other party(ies) from and
against any and all claims, causes of action, losses, liabilities, damages,
costs and expenses of whatsoever kind 

                                       8

 
or nature (including, without limitation, reasonable attorneys' fees and
expenses and any adverse income tax consequences, including, but not limited to,
any interest and penalties) arising out of or in any way resulting from or
directly relating to such breach.

          4.   TAX MATTERS.
               ----------- 

          (A)  If the Prudential Interest is redeemed as contemplated by this
Agreement and the Internal Revenue Service ("IRS") subsequently questions, or
determines that it will examine, investigate or audit any federal income tax
returns filed by the Partnership in respect of any taxable year of the
Partnership ending in the calendar year in which the Redemption Distribution
occurred (the "SUBJECT RETURNS"), then (i) the then Partners of the Partnership
shall cause the Partnership to promptly furnish Prudential with copies of all
written notices received from the IRS, and (ii) Prudential shall have the right,
at its expense, to represent the Partnership (with professionals of its choice)
in dealing with the IRS in connection with any such questions, examination,
investigation or audit and in connection with any judicial or administrative
proceedings related thereto, in each case only to the extent that they involve
any items ("PRUDENTIAL ITEMS") which could have a material impact on Prudential,
and to make decisions regarding or relating to all Prudential Items, except that
Prudential shall not make any decisions which could materially adversely impact
BPLLC and/or Holdings LLC without the prior written consent of BPLLC and
Holdings LLC.  Each of BPLLC and Holdings LLC agrees (on behalf of itself and
its successors and assigns) that neither it nor the Partnership will settle with
the IRS with respect to any Prudential Item without the prior written consent of
Prudential, which consent will not be unreasonably withheld.

          (B)  BPLLC and Holdings LLC shall cause the Partnership to, and the
Partnership shall, report the redemption of the Prudential Interest pursuant to
this Agreement in a manner consistent with the characterization of such
transaction herein, that is, as a withdrawal of Prudential from the Partnership
and the redemption by the Partnership of the Prudential Interest in exchange for
the distribution of Partnership property in liquidation of the Prudential
Interest. BPLLC and Holdings LLC shall submit all Subject Returns to Prudential
for review and approval no later than thirty (30) days prior to the filing
thereof, whether or not Prudential is still then a Partner.  BPLLC and Holdings
LLC agree to modify the reporting of the redemption by the Partnership of the
Prudential Interest to the satisfaction of Prudential to the extent reasonably
requested by Prudential in writing within thirty (30) days of the receipt of any
such returns; provided that, such modification does not materially adversely
              -------- ----                                                 
impact BPLLC and/or Holdings LLC or their Affiliates.  Notwithstanding the
redemption of the Prudential Interest prior to the end of any particular
calendar year, BPLLC and Holdings LLC shall each report their participation in
the Partnership with respect to any years ending in the calendar year in which
the Redemption Distribution occurs consistent with the tax returns approved
pursuant hereto and consistent with this Agreement.

          (C)  In accordance with Treasury Regulation Section 1.706-1(c)(ii),
for the taxable year of the Partnership in which the Redemption Distribution
occurs, Prudential's

                                       9

 
distributive share of the items described in Section 702(a) of the Internal
Revenue Code of 1986, as amended, will be determined by reference to an interim
closing of the books. In accordance with Treasury Regulation Section 1.751-
1(c)(4)(iii), the Partnership, BPLLC, Holdings LLC, and Prudential agree that,
on the Redemption Date, the fair market value of the Partnership's Section 1245
property (as defined in Section 1245(a)(3) of the Internal Revenue Code of 1986,
as amended) is equal to the adjusted tax basis of such property.

          5.   APPOINTMENT OF SUB-MANAGING PARTNER.  Notwithstanding anything to
               -----------------------------------                              
the contrary stated in the Partnership Agreement, in the event that the
Partnership fails to make the Redemption Distribution to Prudential as required
by Sections 1 and 2 above on the Redemption Date, then Prudential shall have the
   ----------     -                                                             
right, exercisable by written notice to the other Partners of the Partnership,
to appoint itself as the sub-managing partner solely for the purpose of making
the Redemption Distribution.  In such event, Prudential shall be solely
authorized and empowered, and its sole responsibility shall be, to make the
Redemption Distribution on, or as soon as practicable after, the Redemption
Date.  The Managing Partner shall continue to act as the managing partner under
the Partnership Agreement during such time and shall fully and faithfully
discharge all obligations and duties of the managing partner under the
Partnership Agreement other than those pertaining to the Redemption Distribution
(which will be performed and discharged by Prudential on behalf of the
Partnership).  Immediately after the Redemption Distribution shall have been
accomplished, Prudential shall resign as sub managing partner of the
Partnership.  Each party hereto further appoints Prudential as the attorney-in-
fact of the Partnership to prepare, sign, file and record any instruments,
agreements or other documents, and to take any other action deemed necessary,
useful or desirable by Prudential in order to make the Redemption Distribution
pursuant to this Agreement in the event that the Managing Partner of the
Partnership or the Partnership fails to timely discharge its obligations
hereunder within the time periods set forth herein.

          6.   REMEDIES.  Any party hereto shall have the right to initiate an
               --------                                                       
action for specific performance with respect to any breach or default of this
Agreement by, or to enforce any obligation under this Agreement of, any other
party hereto (including, without limitation, the obligation of the Partnership
and the Managing Partner to make the Redemption Distribution pursuant hereto),
it being acknowledged and agreed by the parties hereto that monetary damages
would be an inadequate remedy and would not adequately compensate any non-
defaulting party. In addition to the remedy of specific performance, any non-
breaching party may initiate an action seeking actual damages (including,
without limitation, increased income tax liability which may result from such
breach).  Notwithstanding anything to the contrary stated herein, in the Master
Transaction Agreement or in the "Transaction Documents" described in such Master
Transaction Agreement, the limitations of liability set forth in Article 12 of
the Master Transaction Agreement and/or in any other Transaction Document shall
not apply to this Agreement, nor shall such limitations limit or restrict any
right or remedy available to any party hereunder as a result of the breach or
default of any other party under this Agreement.

          7.   NOTICES.  All notices, elections, consents, approvals, demands,
               -------                                                        
objections, requests or other communications which any party hereto may be
required or desire to give to any 

                                       10

 
other party hereto must be in writing and sent by (i) first class U.S. certified
or registered mail, return receipt requested, with postage prepaid, (ii)
telecopy or facsimile (with a copy sent by first class U.S. certified or
registered mail, return receipt requested, with postage prepaid), or (iii)
express mail or a nationally recognized courier (for next business day
delivery). For purposes of this Agreement, the addresses of the parties hereto
shall be as provided below:

     BPLLC, Holdings LLC
     or the Partnership:            Boston Properties, Inc.
                                    8 Arlington Street
                                    Boston, Massachusetts 02116-3495
                                    Attn:  General Counsel
                                    Fax:   (617) 421-1555

          with a copy to:           Goulston & Storrs, P.C.
                                    400 Atlantic Avenue
                                    Boston, Massachusetts 02110-3333
                                    Attn:  Eli Rubenstein, Esq.
                                    Fax:   (617) 574-4112

Prudential or the Partnership:      Prudential Insurance Company
                                    of America
                                    Four Embarcadero Center
                                    Suite 2700
                                    San Francisco, California 94111
                                    Attn:  Harry Mixon, Esq.
                                    Fax:   (415) 956-2197

          with a copy to:           Prudential Realty Group
                                    8 Campus Drive
                                    4th Floor - Arbor Circle South
                                    Parsippany, New Jersey 07054
                                    Attn:  John R. Triece
                                    Fax:   (201) 683-1797

          and a copy to:            O'Melveny & Myers LLP
                                    Embarcadero Center West
                                    275 Battery Street
                                    San Francisco, California 94111
                                    Attn:  Stephen A. Cowan, Esq.
                                    Fax:   (415) 984-8701

Notwithstanding the foregoing, any party may designate another addressee or
change its address for notices and other communications hereunder by a notice
given to the other parties in the 

                                       11

 
manner provided hereinabove. A notice or other communication sent in compliance
with the provisions of this Section 7 shall be deemed given and received on (a)
                            ---------
the third (3rd) day following the date it is deposited in the U.S. mail, (b) the
date of confirmed dispatch if sent by facsimile or telecopy (provided that a
copy thereof is sent by mail in the manner provided in clause (i) above), or (c)
                                                       ----------       
the date it is delivered to the other party if sent by express mail or courier.

          8.   ATTORNEYS' FEES.  If any action is brought by any party hereto
               ---------------                                               
against another party, relating to or arising out of this Agreement, any of the
transactions contemplated hereby or the enforcement hereof, the prevailing
party(ies) shall be entitled to recover from the other party(ies) reasonable
attorneys' fees and costs incurred in connection with the prosecution or defense
of such action.  For purposes of this Agreement, the term "ATTORNEYS' FEES" or
"ATTORNEYS' FEES AND COSTS" shall mean the fees and expenses of counsel to the
parties hereto, which may include printing, photostating, duplicating and other
expenses, air freight charges, and fees billed for law clerks, paralegals and
other persons not admitted to the bar but performing services under the
supervision of an attorney, and the costs and fees incurred in connection with
the enforcement or collection of any judgment obtained in any such proceeding.
The provisions of this Section 8 shall survive the Redemption Distribution and
                       ---------                                              
the entry of any judgment, and shall not merge, or be deemed to have merged,
into any judgment.

          9.   SURVIVAL.  This Agreement and the obligations of the parties
               --------                                                    
hereto shall survive the redemption of the Prudential Interest.

          10.  SUCCESSORS.  This Agreement and all the terms and provisions
               ----------                                                  
hereof shall be binding upon and shall inure to the benefit of all parties
hereto, and their legal representatives, successors and permitted assigns,
except as expressly herein otherwise provided.

          11.  EFFECT AND INTERPRETATION.  This Agreement shall be governed by
               -------------------------                                      
and construed in conformity with the laws of the State of California.

          12.  COUNTERPARTS.  This Agreement may be executed in any number of
               ------------                                                  
counterparts, each of which shall be deemed an original, but all of which when
taken together shall constitute one and the same instrument.  The signature page
of any counterpart may be detached therefrom without impairing the legal effect
of the signature(s) thereon provided such signature page is attached to any
other counterpart identical thereto except having additional signature pages
executed by other parties to this Agreement attached thereto.

          13.  AMENDMENTS.  Except as otherwise provided herein, this Agreement
               ----------                                                      
may not be changed, modified, supplemented or terminated, except by an
instrument in writing executed by the party(ies) hereto which is/are or will be
affected by the terms of such change, modification, supplement or termination,
or executed by the party(ies) authorized to act on behalf of the party(ies) so
affected.

                                       12

 
          14.  TIME OF THE ESSENCE.  Time is of the essence of every term and
               -------------------                                           
provision of this Agreement.

          15.  SEVERABILITY.  If any provision of this Agreement, or the
               ------------                                             
application of such provision to any Person or circumstance, shall be held
invalid by a court of competent jurisdiction, the remainder of this Agreement,
or the application of such provision to Persons or circumstances other than
those to which it is held invalid by such court, shall not be affected thereby.

          16.  EXHIBITS.  Exhibits A through B attached hereto are incorporated
               --------   ----------         -                                 
herein by this reference.

          17.  ENTIRE AGREEMENT.  This Agreement and the other Transaction
               ----------------                                           
Documents are the entire agreement between the parties with respect to the
subject matter hereof and supersede all prior agreements and negotiations.

          18.  AUTHORITY.  Each individual and entity executing this Agreement
               ---------                                                      
hereby represents and warrants that he, she or it has the capacity set forth on
the signature pages hereof with full power and authority to bind the party on
whose behalf he, she or it is executing this Agreement to the terms hereof.

          19.  INCONSISTENCIES WITH PARTNERSHIP AGREEMENT.  If and to the extent
               ------------------------------------------                       
that any terms or provisions of this Agreement are inconsistent with any terms
or provisions of the Partnership Agreement, the terms and provisions of this
Agreement shall govern and control.

          20.  CONSENT TO JURISDICTION AND SERVICE OF PROCESS.  ALL JUDICIAL
               ----------------------------------------------               
PROCEEDINGS BROUGHT AGAINST ANY PARTY HERETO ARISING OUT OF OR RELATING TO THIS
AGREEMENT MAY BE BROUGHT IN ANY STATE OR FEDERAL COURT OF COMPETENT JURISDICTION
IN THE STATE OF CALIFORNIA, AND BY EXECUTION AND DELIVERY OF THIS AGREEMENT EACH
PARTY HERETO ACCEPTS FOR ITSELF, GENERALLY AND UNCONDITIONALLY, THE NONEXCLUSIVE
JURISDICTION OF THE AFORESAID COURTS AND WAIVES ANY DEFENSE OF FORUM NON
CONVENIENS AND IRREVOCABLY AGREES TO BE BOUND BY ANY JUDGMENT RENDERED THEREBY
IN CONNECTION WITH THIS AGREEMENT.  Each party hereby agrees that service of all
process in any such proceeding in any such court may be made by registered or
certified mail, return receipt requested, to any party hereto, at its address
provided in this Agreement, such service being hereby acknowledged by each party
to be sufficient for personal jurisdiction in any action against such party in
any such court and to be otherwise effective and binding service in every
respect.  Nothing herein shall affect the right to serve process in any other
manner permitted by law.

          21.  WAIVER OF JURY TRIAL.  EACH OF THE PARTIES TO THIS AGREEMENT
               --------------------                                        
HEREBY AGREES TO WAIVE ITS RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR
CAUSE OF ACTION BASED UPON OR ARISING OUT OF 

                                      13

 
THIS AGREEMENT OR THE SUBJECT MATTER OF THIS AGREEMENT. The scope of this waiver
is intended to be all-encompassing of any and all disputes that may be filed in
any court and that relate to the subject matter of this Agreement, including,
without limitation, contract claims, tort claims, breach of duty claims and all
other common law and statutory claims. Each party hereto acknowledges that this
waiver is a material inducement to enter into a business relationship, that each
has already relied on this waiver in entering into this Agreement, and that each
shall continue to rely on this waiver in their related future dealings. Each
party hereto further warrants and represents that is has reviewed this waiver
with its legal counsel and that it knowingly and voluntarily waives its jury
trial rights following consultation with such legal counsel. THIS WAIVER IS
IRREVOCABLE, MEANING THAT IT MAY NOT BE MODIFIED EITHER ORALLY OR IN WRITING,
AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS
OR MODIFICATIONS TO THIS AGREEMENT. In the event of litigation, this Agreement
may be filed as a written consent to a trial by the court.


                           [SIGNATURES ON NEXT PAGE]

                                      14

 
     IN WITNESS WHEREOF, each of the parties hereto has executed this Agreement
as of the date and year first written above.

PARTNERSHIP:             THREE EMBARCADERO CENTER VENTURE,
                         a California general partnership

                         By:  BOSTON PROPERTIES LLC,
                              a Delaware limited liability company,
                              as Managing General Partner

                              By:   BOSTON PROPERTIES LIMITED
                                    PARTNERSHIP, a Delaware limited
                                    partnership, as Manager

                                    By:  BOSTON PROPERTIES, INC.,
                                         a Delaware corporation,
                                         as General Partner



                                         By: /s/ Thomas J. O'Connor
                                            -------------------------
                                         Name: Thomas J. O'Connor
                                         Title: Vice President
 
 

BPLLC:                   BOSTON PROPERTIES LLC,
                         a Delaware limited liability company

                         By:  BOSTON PROPERTIES LIMITED
                              PARTNERSHIP, a Delaware limited
                              partnership, as Manager

                              By:   BOSTON PROPERTIES, INC.,
                                    a Delaware corporation,
                                    as General Partner


                                    By: /s/ Thomas J. O'Connor
                                       -------------------------
                                    Name: Thomas J. O'Connor
                                    Title: Vice President
 
                      [SIGNATURES CONTINUED ON NEXT PAGE]

                                      S-1

 
HOLDINGS LLC:            BP EC3 HOLDINGS LLC,
                         a Delaware limited liability company

                         By:  BOSTON PROPERTIES LIMITED
                              PARTNERSHIP, a Delaware limited
                              partnership, as Manager

                              By:   BOSTON PROPERTIES, INC.,
                                    a Delaware corporation,
                                    as General Partner



                                    By: /s/ Thomas J. O'Connor
                                       -------------------------
                                    Name: Thomas J. O'Connor
                                    Title: Vice President


PRUDENTIAL:              THE PRUDENTIAL INSURANCE COMPANY OF
                         AMERICA, a New Jersey corporation



                         By: /s/ Gary L. Frazier
                            -----------------------------------
                         Name:_________________________________
                         Title:________________________________

                                      S-2

 
                                   EXHIBIT A

                               DETERMINATION OF
                     FAIR MARKET VALUE OF INVESTMENT NOTES
                     -------------------------------------


     The Fair Market Value of each Investment Note shall equal the aggregate
Remaining Cash Flow for such Investment Note discounted from each respective
scheduled payment due date to the Redemption Date at a discount factor equal to
the Discount Rate for such Investment Note. Notwithstanding the foregoing, if on
the Determination Date an Investment Loan Borrower Credit Event exists, then the
Managing Partner shall appoint an investment banking firm of national
recognition (which will be satisfactory to Prudential in its reasonable
discretion) to determine the change in the Fair Market Value of the Investment
Notes for purposes of this Agreement.  In the event that an investment banking
firm is appointed to determine the change in the Fair Market Value of any
Investment Note as of the Determination Date pursuant to the preceding sentence,
such investment banking firm shall be instructed to determine the change in the
Fair Market Value of such Investment Note based on the following four factors:
(i) changes in market interest rates since the date of funding of the Investment
Note, (ii) the time period remaining from the Determination Date until the
earlier of the next Rate Reset Date of such Investment Note and the maturity of
the Investment Note, (iii) the Remaining Cash Flow (as defined below) of the
Investment Note, and (iv) changes in the credit quality of the Investment Note
since the date of funding thereof.  The parties agree that an acceptable
investment banking firm would be Goldman Sachs or Merrill Lynch & Company.  As
used herein, the term "INVESTMENT LOAN BORROWER CREDIT EVENT" shall mean any of
the following events: (x) the credit rating of the Investment Notes has been
downgraded from the credit rating of the Investment Notes on the date hereof by
both of the Rating Agencies, or (y) in the reasonable discretion of the Managing
Partner, there has been, as compared to the date hereof, a material diminution
or degradation in the value of the assets of the Investment Loan Borrower, or
the ability of the Investment Loan Borrower to pay its outstanding obligations,
as they become due from the date hereof.

                                 Defined Terms
                                 -------------

     As used herein, the following terms shall have the following meanings:

     "DETERMINATION DATE" shall mean the date upon which the Fair Market Value
of the Investment Notes is determined and shall occur at noon (New York City
time) on the third business day after the date that the Prudential Redemption
Notice or Partnership Redemption Notice, as the case may be, is received by the
addressee thereof.

     "DISCOUNT RATE" shall mean the Reinvestment Rate plus the Margin.

     "MARGIN" shall mean, with respect to any Investment Note, the Margin then
in effect (as defined in the Investment Loan Note Purchase Agreement) of such
Investment Note.

                                      A-1

 
     "RATING AGENCIES" shall mean Fitch IBCA, Inc. and Standard and Poor's
Corporation.

     "REINVESTMENT RATE" shall mean, with respect to any Investment Note, the
offered-side yield to maturity as of the Determination Date of the U.S. Treasury
security that was used to determine the then Treasury of such Investment Note.
Such offered-side yield to maturity shall be determined on or about noon on the
Determination Date and Prudential and the Partnership shall cooperate in the
determination of such Reinvestment Rate.

     "REMAINING CASH FLOW" shall mean, for any Investment Note, the aggregate
amount of all accrued and unpaid interest, principal and other payments under
such Investment Note on the Redemption Date and all principal, interest and
other payments that will become due and owing under such Investment Note from
time to time from and after the Redemption Date through (x) the next Rate Reset
Date of such Investment Note (the "NEXT RESET DATE"), if the Fair Market Value
is determined prior to such Rate Reset Date, or (y) the maturity of such
Investment Note (including, without limitation, any balloon or other principal
payments due and owing on said maturity date), if the Fair Market Value is
determined after all Rate Reset Dates provided in such Investment Note, as each
such payment would become due and payable pursuant to the terms of the
applicable Investment Note and the Investment Loan Documents (but assuming, if
                                                                              
clause (x) above applies, that any interest that is scheduled to be accrued but
- ----------                                                                     
unpaid as of the Next Reset Date (i.e., because the interest payment date with
                                  ----                                        
respect thereto will not have occurred), and any outstanding principal and any
other amounts scheduled to be owing under the Investment Note on such Next Reset
Date, will be repaid in full on the Next Reset Date; and further assuming, for
purposes of calculating all future interest payments due under such Investment
Note, that the interest rate in effect with respect to the Investment Note on
the Redemption Date will remain constant for purposes of determining the Fair
Market Value of such Investment Note).

                                      A-2

 
                                   EXHIBIT B

                                  CERTIFICATE
                           REGARDING INVESTMENT LOAN
                           -------------------------

          THIS CERTIFICATE (this "CERTIFICATE") is made and dated as of
____________, by THREE EMBARCADERO CENTER VENTURE, a California general
partnership ("PARTNERSHIP"), for the benefit of THE PRUDENTIAL INSURANCE COMPANY
OF AMERICA, a New Jersey corporation ("").

          Pursuant to that certain Redemption Agreement dated as of November 12,
1998 (the "REDEMPTION AGREEMENT"), the Partnership (and its partners other than
) and Prudential have been granted certain rights to cause Prudential's interest
in the Partnership to be fully redeemed in exchange for the distribution of all
or a portion of the Investment Notes and, if applicable pursuant to the terms
and provisions of the Redemption Agreement, cash to Prudential.  All capitalized
terms used herein without definition shall have the respective meanings given
such terms in the Redemption Agreement.

          Concurrently herewith and on the date hereof, the Partnership is
distributing the Investment Notes (or a portion thereof) to Prudential in
accordance with the applicable terms and provisions of the Redemption Agreement.

          With respect to the distribution of such Investment Notes, the
Partnership hereby represents and warrants to Prudential as of the date hereof
as follows:

          (a) Subject to the rights of The Prudential Insurance Company of
America or a permitted assignee or designee ("OPTIONEE") under that certain
Option and Put Agreement dated as of November 12, 1998 (the "OPTION AGREEMENT"),
the Partnership is the sole owner of the Investment Notes.  Further, the
Investment Notes delivered to Prudential on the date hereof pursuant to the
Redemption Agreement are free and clear of all liens and third party interests
of any kind or nature other than the interests and rights of Optionee under the
Option Agreement. The Partnership has not amended, modified, terminated or
otherwise by written agreement altered the Investment Notes or the Investment
Loan Documents except as specifically disclosed to Prudential in writing prior
to the date hereof and except for the division of any Investment Note pursuant
to Section 2(a) of the Redemption Agreement.

          (b) The Partnership has not assigned or transferred the Investment
Notes or any of the Investment Loan Documents (except to secure the Equity
Redemption Loan, which assignment has been or simultaneously herewith is being,
released in full in writing), nor are there any agreements to assign or convey
any portion of the Investment Notes or such Investment Loan Documents to any
Person other than Prudential and Optionee (in accordance with the Option
Agreement).

                                      B-1

 
          (c) The Partnership has all requisite power and authority to execute
and deliver all instruments and other documents to be executed and delivered by
the Partnership in connection with the distribution of the Investment Notes to
Prudential on the date hereof and to execute this Certificate.

          (d) The Partnership is a duly formed general partnership under the
laws of the State of California, and is legally authorized to execute, deliver
and perform the Redemption Distribution and this Certificate, and this
Certificate is legal, valid and binding on the Partnership enforceable against
it in accordance with its terms, except to the extent that enforcement may be
limited by applicable bankruptcy, insolvency, moratorium and other principles
relating to or limiting the rights of contracting parties generally.

          (e) The execution of this Certificate and the performance of the
Redemption Distribution by the Partnership will not conflict with or result in a
breach of any statute, rule, regulation, judgment, decree or order of any court,
board, committee or governmental agency to which the Partnership is subject, nor
violate any agreement or contract to which the Partnership is a party or by
which the Partnership is bound.  No consent, approval, authorization or order of
any court or governmental agency or body is required for the execution, delivery
and performance by the Partnership of, or compliance by the Partnership with,
the Certificate or the consummation of the Redemption Distribution, except for
such consents, approvals, authorizations or orders, if any, that have been
obtained.

          Each of the foregoing representations and warranties are personal to
Prudential and no Person other than Prudential shall be entitled to bring any
action based thereon.  Each of the foregoing representations and warranties
shall survive the consummation of the Redemption Distribution.

          The Partnership hereby acknowledges that the acceptance of the
Redemption Distribution and the Investment Notes by Prudential was made and will
have been made in material reliance by Prudential on the aforestated
representations and warranties of the Partnership.

                                      B-2

 
          IN WITNESS WHEREOF, the Partnership has caused its duly authorized
representative to execute this Certificate as of the date first above written.

PARTNERSHIP:             THREE EMBARCADERO CENTER VENTURE,
                         a California general partnership

                         By:  BOSTON PROPERTIES LLC,
                              a Delaware limited liability company,
                              as Managing General Partner

                              By:   BOSTON PROPERTIES LIMITED
                                    PARTNERSHIP, a Delaware limited
                                    partnership, as Manager

                                    By:  BOSTON PROPERTIES, INC.,
                                         a Delaware corporation,
                                         as General Partner



                                         By:__________________________
                                         Name:________________________
                                         Title:_______________________

                                      B-3

 
                                                                   EXHIBIT 99.18


                             REDEMPTION AGREEMENT


          THIS REDEMPTION AGREEMENT (this "AGREEMENT") dated as of November 12,
1998, is made and entered into by and among FOUR EMBARCADERO CENTER VENTURE, a
California general partnership ("PARTNERSHIP"), BOSTON PROPERTIES LLC, a
Delaware limited liability company ("BPLLC"), BP EC4 HOLDINGS LLC, a Delaware
limited liability company ("HOLDINGS LLC"), and THE PRUDENTIAL INSURANCE COMPANY
OF AMERICA, a New Jersey corporation ("PRUDENTIAL").


                                R E C I T A L S
                                - - - - - - - -

          A.   Pursuant to that certain Master Transaction Agreement dated as of
September 28, 1998, by and among Boston Properties Limited Partnership, Boston
Properties, Inc., Prudential, PIC Realty Corporation, a Delaware corporation,
Fedmark Corporation, Embarcadero Center Investors Partnership, Pacific Property
Services, L.P. and certain other persons listed on Exhibit A thereto (the
"MASTER TRANSACTION AGREEMENT"), BPLLC, Holdings LLC and Prudential have become
the sole partners of the Partnership, which Partnership is currently governed by
that certain Second Amended and Restated Partnership Agreement of Four
Embarcadero Center Venture of even date herewith (the "PARTNERSHIP AGREEMENT").
All capitalized terms used herein without definition shall have the respective
meanings given such terms in the Partnership Agreement.

          B.   Prudential desires to acquire the right to have its entire
interest in and to the Partnership (the "PRUDENTIAL INTEREST") redeemed by the
Partnership at any time from and after the date hereof in accordance with the
terms and provisions of this Agreement below, and BPLLC and Holdings LLC desire
to acquire the right to cause the Prudential Interest to be redeemed by the
Partnership at any time after the date which is ninety (90) days after the date
hereof in accordance with the terms and provisions of this Agreement below, all
as hereinafter provided.

          C.   In connection with the redemption transactions described in
Recital B above, the parties hereto desire to make certain additional covenants
- ---------                                                                      
and agreements as hereinafter set forth.

          NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged by the parties hereto, the parties
hereby agree as follows:

          1.   REDEMPTION EVENT.
               ---------------- 

          (A) The Prudential Interest shall be fully redeemed by the Partnership
in the manner provided in Section 2 below in the event that a Prudential
                          ---------                                     
Redemption Notice is duly given

                                       1

 
to BPLLC or any other Person who is then the managing partner of the Partnership
(the "MANAGING PARTNER") in accordance with subsection (b) below or a
                                            --------------
Partnership Redemption Notice is duly given to Prudential by BPLLC or Holdings
LLC (on behalf of the Partnership) in accordance with subsection (c) below.
                                                      --------------

          (B) At any time after the date hereof, Prudential may elect to have
the Prudential Interest fully redeemed by the Partnership in accordance with
Section 2 below by giving written notice (a "PRUDENTIAL REDEMPTION NOTICE") to
- ---------                                                                     
the Managing Partner stating that Prudential is electing to have the Prudential
Interest fully redeemed pursuant to this Agreement; provided that,
                                                    -------- ---- 
notwithstanding the foregoing, Prudential's right to give a Prudential
Redemption Notice and to be redeemed at its election shall be suspended during
any period of time while there exists an Investment Loan Borrower Credit Event
(as defined in Exhibit A attached hereto).  A Prudential Redemption Notice shall
               ---------                                                        
only be effective if simultaneously with the giving of such notice (x) PIC
delivers a similar notice with respect to the Redemption Agreements of even date
herewith to which it is a party with One Embarcadero Center Venture and
Embarcadero Center Associates, respectively, (y) Prudential delivers a similar
notice with respect to the Redemption Agreement of even date herewith to which
Prudential and Three Embarcadero Center Venture are parties (such similar
notices of PIC and Prudential, the "CORRESPONDING NOTICES"), and (z) each
Corresponding Notice specifies the same Redemption Date as is specified in the
Prudential Redemption Notice.

          (C) At any time on or after the date which is five (5) business days
prior to the date which is ninety (90) days after the date hereof (i.e., such
                                                                   ----      
that the Redemption Date selected by BPLLC or Holdings LLC shall not occur prior
to the date which is ninety (90) days after the date hereof), either BPLLC or
Holdings LLC may elect to have the Partnership fully redeem the Prudential
Interest in accordance with Section 2 below by giving written notice (the
                            ---------                                    
"PARTNERSHIP REDEMPTION NOTICE") to Prudential stating that the Partnership is
electing to have the Prudential Interest fully redeemed pursuant to this
Agreement; provided that, notwithstanding the foregoing, BPLLC's and Holding
           -------- ----                                                    
LLC's right to give a Partnership Redemption Notice and to cause the Partnership
to redeem the Prudential Interest at either of their elections shall be
suspended during any period of time while any of the Investment Notes have been
accelerated and such acceleration has not been rescinded by the holder(s) of
such Investment Notes.

          (D) As used herein, the following terms shall have the following
meanings:

          "AMORTIZED LEASING COSTS" shall mean, for any period, the sum of the
amortized portion of all Investor Leasing Costs (as defined in the Master
Transaction Agreement) and New Leasing Costs for such period, it being
acknowledged and agreed that all such Investor Leasing Costs and New Leasing
Costs shall be amortized on a straight-line basis monthly over the base term of
the applicable lease commencing on the rent commencement date for such lease,
plus interest on the unamortized portion of all Investor Leasing Costs and New
- ----                                                                          
Leasing Costs outstanding from time to time during such period at the rate of
ten percent (10%) per annum.

                                       2

 
          "BROKEN LIBOR COST" shall mean the extra payment which the Partnership
must make on account of repaying the Equity Redemption Loan on a date other than
the end of an "interest period" because the Redemption Date falls on a date
other than the end of an "interest period" (it being acknowledged and agreed by
the parties hereto that, if the Redemption Date falls on a date which is the end
of an "interest period", there shall be no Broken LIBOR Cost for purposes of
this Agreement).  The Managing Partner shall, at the request of Prudential,
provide Prudential with a schedule showing the end of all "interest periods" for
purposes of timing the Redemption Distribution and Prudential may rely on such
schedule for purposes of designating a Redemption Date.

          "FAIR MARKET VALUE OF THE INVESTMENT NOTES" shall be determined
pursuant to and in accordance with the terms and provisions of Exhibit A
                                                               ---------
attached hereto.

          "FAIR MARKET VALUE OF THE PRUDENTIAL INTEREST" shall equal, on the
Redemption Date, the sum of $93,840,807 (which amount equals Prudential's
Percentage Interest immediately prior to the Redemption Distribution multiplied
by the NMV (defined in the Master Transaction Agreement) of the Property as of
the date hereof, adjusted to:

          (i)   add an amount equal to the product of Prudential's Percentage
                ---                                                          
     Interest immediately prior to the Redemption Distribution, multiplied by
                                                                ---------- --
     any Unrealized Gain (defined below), if any, on the Investment Notes as of
     the Determination Date (described in Exhibit A attached hereto) or deduct
                                          ---------                     ------
     an amount equal to the product of Prudential's Percentage Interest
     immediately prior to the Redemption Distribution, multiplied by any
                                                       ---------- --    
     Unrealized Loss (defined below), if any, on the Investment Notes as of the
     Determination Date;

          (ii)  deduct all distributions (other than the Redemption Distribution
                ------                                                          
     and any distribution of OP Units) actually made by the Partnership to (and
     received by) Prudential from and after the date hereof through and
     including the Redemption Date;

          (iii) add any Capital Contributions made by Prudential from and after
                ---                                                            
     the date hereof through and including the Redemption Date;

          (iv)  add an amount equal to the product of Prudential's Percentage
                ---                                                          
     Interest immediately prior to the Redemption Distribution, multiplied by
                                                                ---------- --
     the estimated Operating Profits, if any, for the period from and after the
     date hereof through and including the Redemption Date or deduct an amount
                                                              ------          
     equal to Prudential's Percentage Interest immediately prior to the
     Redemption Distribution, multiplied by the estimated Operating Losses, if
                              ---------- --                                   
     any, for the period from and after the date hereof through and including
     the Redemption Date;

          (v)   deduct an amount equal to the unamortized portion of all
                ------                                                  
     Interest Rate Approved Loan Costs with respect to the Prudential Guarantied
     Loan (which Prudential

                                       3

 
     Guarantied Loan will be assumed by Prudential in connection with the
     Redemption Distribution);

          (vi)   add an amount equal to Prudential's Percentage Interest in the
                 ---                                                           
     Partnership immediately prior to the Redemption Distribution multiplied by
     all cash distributions or cash proceeds ("MTA PROCEEDS") actually received
     by the Partnership from Two Embarcadero Center West and Three Embarcadero
     Center West from and after the date hereof;

          (vii)  subtract an amount equal to the Broken Libor Cost (if any); and
                 --------                                                       

          (viii) add an amount equal to the difference between the NEV (as
                 ---                                                      
     defined in the Master Transaction Agreement) of the Property minus the NMV
     of the Property (if such difference is a positive number) or subtract an
                                                                  --------   
     amount equal to the difference between the NMV of the Property minus the
     NEV of the Property (if the difference is a positive number); provided
                                                                   --------
     that, if, as of the Redemption Date, the Adjusted NEV (as defined in the
     ----                                                                    
     Master Transaction Agreement) shall have been determined in accordance with
     Exhibit V of the Master Transaction Agreement, then in lieu of the
     adjustment provided for in this clause (viii) above, an adjustment shall be
                                     -------------                              
     made to add an amount equal to the Revised NEV (defined immediately below)
             ---                                                               
     of the Property minus the NMV of the Property (if such difference is a
     positive number) or subtract an amount equal to the NMV of the Property
                         --------                                           
     minus the Revised NEV of the Property (if such difference is a positive
     number).  As used herein, the "REVISED NEV OF THE PROPERTY" shall mean an
     amount equal to the sum of the NEV of the Property plus or minus, as the
     case may be, the adjustment made to the NEV pursuant to Section V-9-1 of
     Exhibit V of the Master Transaction Agreement.

For purposes of determining estimated Operating Profits or Operating Losses
hereunder, the Managing Partner shall provide Prudential with its calculation of
estimated Operating Profits or Operating Losses prior to the Redemption
Distribution, which calculation shall be subject to Prudential's approval (not
to be unreasonably withheld or delayed), and the Partnership and Prudential
shall thereafter make any necessary adjustments to said calculation as complete
information becomes available within thirty (30) days after the Redemption Date
in accordance with the terms and provisions of Section 2(e) below.
                                               ------------       

          "LEASING COSTS" shall mean any and all (i) tenant improvement
allowances, move-in allowances, brokerage commissions, expenses incurred or to
be incurred for repairs, improvements, equipment, painting, decorating,
partitioning and other items to satisfy the tenant's requirements for the
commencement of the applicable lease, (ii) the cost of removal and/or abatement
of asbestos or other hazards or toxic substances located in the demised space in
violation of law and as required in order to satisfy the tenant's requirements
for the commencement of the applicable lease, (iii) rent concessions as stated
in the respective lease (and applicable lease documents) relating to the demised
space provided the tenant has the right to take possession of such demised space
during the period of such rent concessions, (iv) base building

                                       4

 
modifications required by the applicable lease, and (v) expenses incurred or to
be incurred for the purpose of satisfying or terminating the obligations of a
tenant to the landlord under another lease.

          "OP UNITS" shall mean a number of Series Three Preferred Units in
Boston Properties Limited Partnership equal to the product of (i) Prudential's
Percentage Interest in the Partnership immediately prior to the "Closing" under
the Master Transaction Agreement, multiplied by (ii) the total number of Series
                                  ---------- --                                
Three Preferred Units in Boston Properties Limited Partnership actually received
by the Partnership from Two Embarcadero Center West and Three Embarcadero Center
West.

          "NEW LEASING COSTS" shall mean all Leasing Costs incurred by the
Partnership in connection with any new Leases executed after the date hereof and
prior to the Redemption Date.

          "OPERATING ASSETS" shall mean all real property, improvements, leases,
licenses, fixtures and tangible and intangible personal property owned by the
Partnership on the date hereof other than cash, deposit accounts and money.

          For any period, "OPERATING PROFITS" shall mean the absolute value of
the following amount (if positive) and "OPERATING LOSSES" shall mean the
absolute value of the following amount (if negative): net income (loss) of the
Partnership for such period determined in accordance with GAAP without giving
effect to extraordinary gains (or losses) or any taxes on or measured by such
net income or loss, plus the sum of (i) all amortization and depreciation
                    ----                                                 
expense and other non-cash expenses (it being acknowledged by the parties hereto
that principal payments on account of debt and capital expenditures other than
those amortized during any period for which net income (loss) is being
determined are not taken into account or deducted when calculating net income
(loss) under GAAP), (ii) all Leasing Costs that are not treated as capital
expenditures under GAAP, (iii) all interest expense of the Partnership on loans
made by any BP Partner under the Partnership Agreement (which loans are
evidenced by a BP Note) and (iv) all fees, costs and expenses (other than
interest expense) incurred by the Partnership or any Partner in connection with
any Partnership loan which were deducted as an expense (rather than amortized)
other than non-amortizable fees, costs and expenses for Approved Loan Costs and
non-amortizable Excess Proceeds Borrowing Costs, minus the Amortized Leasing
                                                 -----                      
Costs for such period and the amortized portion of the Approved Loan Costs and
the Excess Proceeds Borrowing Costs for such period. Operating Profits and
Losses for any partial month shall be prorated on the basis of the actual number
of days of such month and a 365-day year.

          "REDEMPTION AMOUNT" shall equal (i) the Fair Market Value of the
Prudential Interest on the Redemption Date, plus (ii) the outstanding principal
                                            ----                               
balance of the Prudential Guarantied Loan assumed by Prudential on the
Redemption Date in connection with the distribution of the Investment Notes to
Prudential, together with all accrued but unpaid interest on the Prudential
Guarantied Loan as of such date.

                                       5

 
          "REDEMPTION DATE" shall mean the earlier of (x) the date specified in
a Prudential Redemption Notice given by Prudential to the Managing Partner
(provided that such date shall be at least five (5) business days after the
- --------- ----                                                             
giving of such Prudential Redemption Notice), and (y) the date specified in a
Partnership Redemption Notice given by BPLLC or Holdings LLC to Prudential
(provided that such date shall be at least five (5) business days after the
- --------- ----                                                             
giving of such Partnership Redemption Notice).

          "UNREALIZED GAIN" shall mean the excess (if any) of (x) the aggregate
Fair Market Value of all Investment Notes (provided that, in calculating the
Fair Market Value of the Investment Notes for purposes of determining Unrealized
Gain, the accrued and unpaid interest thereunder as of the Redemption Date shall
not be added to the Remaining Cash Flow), minus (y) the aggregate face amounts
                                          -----                               
of all Investment Notes.

          "UNREALIZED LOSS" shall mean the excess (if any) of (A) the aggregate
face amounts of all Investment Notes minus (B) the aggregate Fair Market Value
                                     -----                                    
of all Investment Notes (provided that, in calculating the Fair Market Value of
the Investment Notes for purposes of determining Unrealized Loss, the accrued
and unpaid interest thereunder as of the Redemption Date shall not be added to
the Remaining Cash Flow).

          2.   REDEMPTION DISTRIBUTION.
               ----------------------- 

          (A) On the Redemption Date the Partnership shall distribute to
Prudential, as a "REDEMPTION DISTRIBUTION" in full redemption of the Prudential
Interest, (i) the Partnership's entire right, title and interest in, to and
under the Investment Notes (subject to the Prudential Guarantied Loan) and all
rights in, to and under the other instruments and agreements relating to the
Investment Loan (collectively, the "INVESTMENT LOAN DOCUMENTS") (provided that,
                                                                 -------- ---- 
the Partnership shall retain all claims, rights, obligations and liabilities
under the Investment Loan Documents accruing prior to the Redemption Date
(except the right to any accrued and unpaid interest under the Investment Notes
distributed to Prudential as of the Redemption Date, which shall be paid to
Prudential after the Redemption Date and which is included and accounted for in
the calculation of the Fair Market Value of the Investment Notes pursuant to
Exhibit A attached hereto), and if the Partnership retains any Remainder Notes
- ---------                                                                     
pursuant to the provisions of this Section 2(a) below, the Partnership shall
                                   ------------                             
retain all rights, obligations and liabilities under the Investment Loan
Documents relating to such Remainder Notes, if any, retained by the Partnership
(both accruing prior to and after the Redemption Date), (ii) if the Redemption
Amount exceeds the aggregate Fair Market Value of the Investment Notes, cash in
an amount equal to the difference between the Redemption Amount and the
aggregate Fair Market Value of the Investment Notes, and (iii) if and to the
extent that the Partnership has not already distributed to Prudential the OP
Units, the OP Units.  Notwithstanding the foregoing, if the aggregate Fair
Market Value of all Investment Notes on the Redemption Date exceeds the
Redemption Amount on such date, then (A) on the Redemption Date the Partnership
shall assign to Prudential its entire interest in only such Investment Notes (in
the order provided in the next sentence) that collectively have an aggregate
Fair Market Value at the time of such assignment equal to the Redemption

                                       6

 
Amount, and (B) the Partnership shall cause any individual Investment Note which
is only partially assigned to Prudential in accordance with the next sentence to
be replaced by the issuer thereof with two notes in accordance with the terms
and provisions of the next sentence. In connection with the distribution of
Investment Notes pursuant to the immediately preceding sentence, the Partnership
shall distribute to Prudential those Investment Notes with the latest maturity
dates one by one beginning with the Investment Note with the latest maturity
date and then the Investment Note with the next latest maturity date and so
forth until the total Fair Market Value of all Investment Notes distributed to
Prudential equals the Redemption Amount; provided that, if necessary in order to
                                         -------- ----                          
distribute to Prudential Investment Notes with a Fair Market Value exactly equal
to the Redemption Amount, the last Investment Note to be distributed will be
divided into two notes collectively having an aggregate principal amount equal
to such original Investment Note and otherwise having identical terms, so that
one of such notes (when taken together with the other Investment Notes
distributed to Prudential in accordance with the order of priority set forth
hereinabove) will have a Fair Market Value equal to the Redemption Amount and
such note shall be assigned to Prudential by the Partnership.  If less than all
of the Investment Notes are assigned to Prudential in connection with the
Redemption Distribution as provided above, the Investment Note(s) retained by
the Partnership shall be collectively referred to herein as the "REMAINDER
NOTES".

          (B) Concurrently with the Redemption Distribution, the Partnership
shall execute and deliver to Prudential an Investment Loan Certificate in the
form of Exhibit B attached hereto without modification.
        ---------                                      

          (C) Concurrently with the Redemption Distribution, the Partnership
shall assign to Prudential, and Prudential shall accept and assume, the
Prudential Guarantied Loan and all instruments and agreements relating thereto,
and Prudential shall thereafter be subject to all claims, rights, obligations
and liabilities thereunder accruing from and after the Redemption Date (except
that Prudential shall also assume and be subject to the obligation to pay all
accrued but unpaid interest under such Prudential Guarantied Loan as of and
including the Redemption Date to the extent the same has not yet become due and
payable under the Prudential Guarantied Loan Documents); and the lender under
such documents shall release the Partnership, in a writing delivered to the
Partnership, from all claims, rights, obligations and liabilities thereunder
accruing from and after the Redemption Date and from the obligation to pay any
accrued and unpaid interest under such Prudential Guarantied Loan as of and
including the Redemption Date to the extent such interest payment has not yet
become due and payable under the Prudential Guarantied Loan Documents.

          (D) It shall be a condition precedent to the consummation of the
transactions described in subsections (a), (b) and (c) above that all occur
                          ---------------  ---     ---                     
simultaneously.

          (E) Within thirty (30) days after the end of the calendar month in
which the Redemption Date occurs, the Partnership and Prudential shall obtain
all necessary and complete information regarding the Operating Profits or
Operating Losses of the Partnership accruing from

                                       7

 
the date hereof through and including the Redemption Date and shall agree upon
and make any necessary adjustments to the estimated Operating Profits or
Operating Losses of the Partnership which were utilized in calculating the Fair
Market Value of the Prudential Interest on the Redemption Date. If, after making
such adjustments, the actual Operating Profits of the Partnership are greater
than the estimated Operating Profits utilized to determine the Fair Market Value
of the Prudential Interest on the Redemption Date, or the actual Operating
Losses are less than the estimated Operating Losses, as the case may be, then
the Partnership shall promptly make a cash payment to Prudential equal to the
difference. If, after making such adjustments, the actual Operating Profits of
the Partnership are less than the estimated Operating Profits utilized to
determine the Fair Market Value of the Prudential Interest on the Redemption
Date, or the actual Operating Losses are greater than the estimated Operating
Losses, as the case may be, then Prudential shall promptly make a cash payment
to the Partnership equal to the difference. In addition to the foregoing, if the
Adjusted NEV of the Property has not been determined pursuant to Exhibit V of
the Master Transaction Agreement as of the Redemption Date, then promptly
following such determination of Adjusted NEV of the Property, if any, pursuant
to said Exhibit V, if the Revised NEV of the Property exceeds the NEV of the
Property, the Partnership shall pay to Prudential, in cash, a sum equal to such
difference, and if the NEV of the Property exceeds the Revised NEV of the
Property, then Prudential shall pay to the Partnership, in cash, a sum equal to
such difference.

          3.   COVENANTS; INDEMNITIES.
               ---------------------- 

          (A)  BPLLC, Holdings LLC, Prudential and the Partnership (on behalf of
themselves and their respective successors and assigns) each hereby covenants
and agrees with each other that, during the period of time from the date hereof
through and including the second (2nd) anniversary of the Redemption Date, (i)
none of the Equity Redemption Loan obtained by the Partnership on the date
hereof pursuant to the terms of the Partnership Agreement or any debt replacing
any such Equity Redemption Loan in accordance with the terms and provisions of
the Partnership Agreement, shall be repaid by any Capital Contributions made by
any Partner of the Partnership, (ii) the Partnership shall at all times maintain
and continue its existence as a general partnership under the laws of the State
of California and shall not be dissolved, wound-up or terminated during such
period of time, and (iii) except as otherwise expressly provided in this
Agreement, the Partnership shall not distribute all or any portion of its
Operating Assets to any Partner.  Each of the afore-mentioned Persons (on behalf
of themselves and their Affiliates) hereby covenants not to commit any act in
violation of this covenant (or to permit any successor or assign of any such
Person to commit any such act).

          (B)  In addition to, and not in limitation of, any other rights and
remedies available to the parties hereto under this Agreement or at law or in
equity, each party hereto (on behalf of itself) agrees that, in the event of a
breach by any party or its Affiliate (such party, the "breaching party") of any
of the covenants set forth in subsection (a) above, such breaching party shall
                              --------------                                  
indemnify, protect, defend and hold harmless the other party(ies) from and
against any and all claims, causes of action, losses, liabilities, damages,
costs and expenses of whatsoever kind 

                                       8

 
or nature (including, without limitation, reasonable attorneys' fees and
expenses and any adverse income tax consequences, including, but not limited to,
any interest and penalties) arising out of or in any way resulting from or
directly relating to such breach.

          4.   TAX MATTERS.
               ----------- 

          (A) If the Prudential Interest is redeemed as contemplated by this
Agreement and the Internal Revenue Service ("IRS") subsequently questions, or
determines that it will examine, investigate or audit any federal income tax
returns filed by the Partnership in respect of any taxable year of the
Partnership ending in the calendar year in which the Redemption Distribution
occurred (the "SUBJECT RETURNS"), then (i) the then Partners of the Partnership
shall cause the Partnership to promptly furnish Prudential with copies of all
written notices received from the IRS, and (ii) Prudential shall have the right,
at its expense, to represent the Partnership (with professionals of its choice)
in dealing with the IRS in connection with any such questions, examination,
investigation or audit and in connection with any judicial or administrative
proceedings related thereto, in each case only to the extent that they involve
any items ("PRUDENTIAL ITEMS") which could have a material impact on Prudential,
and to make decisions regarding or relating to all Prudential Items, except that
Prudential shall not make any decisions which could materially adversely impact
BPLLC and/or Holdings LLC without the prior written consent of BPLLC and
Holdings LLC.  Each of BPLLC and Holdings LLC agrees (on behalf of itself and
its successors and assigns) that neither it nor the Partnership will settle with
the IRS with respect to any Prudential Item without the prior written consent of
Prudential, which consent will not be unreasonably withheld.

          (B) BPLLC and Holdings LLC shall cause the Partnership to, and the
Partnership shall, report the redemption of the Prudential Interest pursuant to
this Agreement in a manner consistent with the characterization of such
transaction herein, that is, as a withdrawal of Prudential from the Partnership
and the redemption by the Partnership of the Prudential Interest in exchange for
the distribution of Partnership property in liquidation of the Prudential
Interest. BPLLC and Holdings LLC shall submit all Subject Returns to Prudential
for review and approval no later than thirty (30) days prior to the filing
thereof, whether or not Prudential is still then a Partner.  BPLLC and Holdings
LLC agree to modify the reporting of the redemption by the Partnership of the
Prudential Interest to the satisfaction of Prudential to the extent reasonably
requested by Prudential in writing within thirty (30) days of the receipt of any
such returns; provided that, such modification does not materially adversely
              -------- ----                                                 
impact BPLLC and/or Holdings LLC or their Affiliates.  Notwithstanding the
redemption of the Prudential Interest prior to the end of any particular
calendar year, BPLLC and Holdings LLC shall each report their participation in
the Partnership with respect to any years ending in the calendar year in which
the Redemption Distribution occurs consistent with the tax returns approved
pursuant hereto and consistent with this Agreement.

          (C) In accordance with Treasury Regulation Section 1.706-1(c)(ii), for
the taxable year of the Partnership in which the Redemption Distribution occurs,
Prudential's

                                       9

 
distributive share of the items described in Section 702(a) of the Internal
Revenue Code of 1986, as amended, will be determined by reference to an interim
closing of the books. In accordance with Treasury Regulation Section 1.751-
1(c)(4)(iii), the Partnership, BPLLC, Holdings LLC, and Prudential agree that,
on the Redemption Date, the fair market value of the Partnership's Section 1245
property (as defined in Section 1245(a)(3) of the Internal Revenue Code of 1986,
as amended) is equal to the adjusted tax basis of such property.

          5.   APPOINTMENT OF SUB-MANAGING PARTNER.  Notwithstanding anything to
               -----------------------------------                              
the contrary stated in the Partnership Agreement, in the event that the
Partnership fails to make the Redemption Distribution to Prudential as required
by Sections 1 and 2 above on the Redemption Date, then Prudential shall have the
   ----------     -                                                             
right, exercisable by written notice to the other Partners of the Partnership,
to appoint itself as the sub-managing partner solely for the purpose of making
the Redemption Distribution.  In such event, Prudential shall be solely
authorized and empowered, and its sole responsibility shall be, to make the
Redemption Distribution on, or as soon as practicable after, the Redemption
Date.  The Managing Partner shall continue to act as the managing partner under
the Partnership Agreement during such time and shall fully and faithfully
discharge all obligations and duties of the managing partner under the
Partnership Agreement other than those pertaining to the Redemption Distribution
(which will be performed and discharged by Prudential on behalf of the
Partnership).  Immediately after the Redemption Distribution shall have been
accomplished, Prudential shall resign as sub managing partner of the
Partnership.  Each party hereto further appoints Prudential as the attorney-in-
fact of the Partnership to prepare, sign, file and record any instruments,
agreements or other documents, and to take any other action deemed necessary,
useful or desirable by Prudential in order to make the Redemption Distribution
pursuant to this Agreement in the event that the Managing Partner of the
Partnership or the Partnership fails to timely discharge its obligations
hereunder within the time periods set forth herein.

          6.   REMEDIES.  Any party hereto shall have the right to initiate an
               --------                                                       
action for specific performance with respect to any breach or default of this
Agreement by, or to enforce any obligation under this Agreement of, any other
party hereto (including, without limitation, the obligation of the Partnership
and the Managing Partner to make the Redemption Distribution pursuant hereto),
it being acknowledged and agreed by the parties hereto that monetary damages
would be an inadequate remedy and would not adequately compensate any non-
defaulting party. In addition to the remedy of specific performance, any non-
breaching party may initiate an action seeking actual damages (including,
without limitation, increased income tax liability which may result from such
breach).  Notwithstanding anything to the contrary stated herein, in the Master
Transaction Agreement or in the "Transaction Documents" described in such Master
Transaction Agreement, the limitations of liability set forth in Article 12 of
the Master Transaction Agreement and/or in any other Transaction Document shall
not apply to this Agreement, nor shall such limitations limit or restrict any
right or remedy available to any party hereunder as a result of the breach or
default of any other party under this Agreement.

          7.   NOTICES.  All notices, elections, consents, approvals, demands,
               -------                                                        
objections, requests or other communications which any party hereto may be
required or desire to give to any

                                       10

 
other party hereto must be in writing and sent by (i) first class U.S. certified
or registered mail, return receipt requested, with postage prepaid, (ii)
telecopy or facsimile (with a copy sent by first class U.S. certified or
registered mail, return receipt requested, with postage prepaid), or (iii)
express mail or a nationally recognized courier (for next business day
delivery). For purposes of this Agreement, the addresses of the parties hereto
shall be as provided below:

     BPLLC, Holdings LLC
     or the Partnership:            Boston Properties, Inc.
                                    8 Arlington Street
                                    Boston, Massachusetts 02116-3495
                                    Attn:  General Counsel
                                    Fax:   (617) 421-1555

          with a copy to:           Goulston & Storrs, P.C.
                                    400 Atlantic Avenue
                                    Boston, Massachusetts 02110-3333
                                    Attn:  Eli Rubenstein, Esq.
                                    Fax:   (617) 574-4112

Prudential or the Partnership:      Prudential Insurance Company
                                    of America
                                    Four Embarcadero Center
                                    Suite 2700
                                    San Francisco, California 94111
                                    Attn:  Harry Mixon, Esq.
                                    Fax:   (415) 956-2197

          with a copy to:           Prudential Realty Group
                                          8 Campus Drive
                                    4th Floor - Arbor Circle South
                                    Parsippany, New Jersey 07054
                                    Attn:  John R. Triece
                                    Fax:   (201) 683-1797

          and a copy to:            O'Melveny & Myers LLP
                                    Embarcadero Center West
                                    275 Battery Street
                                    San Francisco, California 94111
                                    Attn:  Stephen A. Cowan, Esq.
                                    Fax:   (415) 984-8701

Notwithstanding the foregoing, any party may designate another addressee or
change its address for notices and other communications hereunder by a notice
given to the other parties in the 

                                       11

 
manner provided hereinabove. A notice or other communication sent in compliance
with the provisions of this Section 7 shall be deemed given and received on (a)
                            ---------
the third (3rd) day following the date it is deposited in the U.S. mail, (b) the
date of confirmed dispatch if sent by facsimile or telecopy (provided that a
copy thereof is sent by mail in the manner provided in clause (i) above), or (c)
                                                       ---------- 
the date it is delivered to the other party if sent by express mail or courier.

          8.   ATTORNEYS' FEES.  If any action is brought by any party hereto
               ---------------                                               
against another party, relating to or arising out of this Agreement, any of the
transactions contemplated hereby or the enforcement hereof, the prevailing
party(ies) shall be entitled to recover from the other party(ies) reasonable
attorneys' fees and costs incurred in connection with the prosecution or defense
of such action.  For purposes of this Agreement, the term "ATTORNEYS' FEES" or
"ATTORNEYS' FEES AND COSTS" shall mean the fees and expenses of counsel to the
parties hereto, which may include printing, photostating, duplicating and other
expenses, air freight charges, and fees billed for law clerks, paralegals and
other persons not admitted to the bar but performing services under the
supervision of an attorney, and the costs and fees incurred in connection with
the enforcement or collection of any judgment obtained in any such proceeding.
The provisions of this Section 8 shall survive the Redemption Distribution and
                       ---------                                              
the entry of any judgment, and shall not merge, or be deemed to have merged,
into any judgment.

          9.   SURVIVAL.  This Agreement and the obligations of the parties
               --------                                                    
hereto shall survive the redemption of the Prudential Interest.

          10.  SUCCESSORS.  This Agreement and all the terms and provisions
               ----------                                                  
hereof shall be binding upon and shall inure to the benefit of all parties
hereto, and their legal representatives, successors and permitted assigns,
except as expressly herein otherwise provided.

          11.  EFFECT AND INTERPRETATION.  This Agreement shall be governed by
               -------------------------                                      
and construed in conformity with the laws of the State of California.

          12.  COUNTERPARTS.  This Agreement may be executed in any number of
               ------------                                                  
counterparts, each of which shall be deemed an original, but all of which when
taken together shall constitute one and the same instrument.  The signature page
of any counterpart may be detached therefrom without impairing the legal effect
of the signature(s) thereon provided such signature page is attached to any
other counterpart identical thereto except having additional signature pages
executed by other parties to this Agreement attached thereto.

          13.  AMENDMENTS.  Except as otherwise provided herein, this Agreement
               ----------                                                      
may not be changed, modified, supplemented or terminated, except by an
instrument in writing executed by the party(ies) hereto which is/are or will be
affected by the terms of such change, modification, supplement or termination,
or executed by the party(ies) authorized to act on behalf of the party(ies) so
affected.

                                       12

 
          14.  TIME OF THE ESSENCE.  Time is of the essence of every term and
               -------------------                                           
provision of this Agreement.

          15.  SEVERABILITY.  If any provision of this Agreement, or the
               ------------                                             
application of such provision to any Person or circumstance, shall be held
invalid by a court of competent jurisdiction, the remainder of this Agreement,
or the application of such provision to Persons or circumstances other than
those to which it is held invalid by such court, shall not be affected thereby.

          16.  EXHIBITS.  Exhibits A through B attached hereto are incorporated
               --------   ----------         -                                 
herein by this reference.

          17.  ENTIRE AGREEMENT.  This Agreement and the other Transaction
               ----------------                                           
Documents are the entire agreement between the parties with respect to the
subject matter hereof and supersede all prior agreements and negotiations.

          18.  AUTHORITY.  Each individual and entity executing this Agreement
               ---------                                                      
hereby represents and warrants that he, she or it has the capacity set forth on
the signature pages hereof with full power and authority to bind the party on
whose behalf he, she or it is executing this Agreement to the terms hereof.

          19.  INCONSISTENCIES WITH PARTNERSHIP AGREEMENT.  If and to the extent
               ------------------------------------------                       
that any terms or provisions of this Agreement are inconsistent with any terms
or provisions of the Partnership Agreement, the terms and provisions of this
Agreement shall govern and control.

          20.  CONSENT TO JURISDICTION AND SERVICE OF PROCESS.  ALL JUDICIAL
               ----------------------------------------------               
PROCEEDINGS BROUGHT AGAINST ANY PARTY HERETO ARISING OUT OF OR RELATING TO THIS
AGREEMENT MAY BE BROUGHT IN ANY STATE OR FEDERAL COURT OF COMPETENT JURISDICTION
IN THE STATE OF CALIFORNIA, AND BY EXECUTION AND DELIVERY OF THIS AGREEMENT EACH
PARTY HERETO ACCEPTS FOR ITSELF, GENERALLY AND UNCONDITIONALLY, THE NONEXCLUSIVE
JURISDICTION OF THE AFORESAID COURTS AND WAIVES ANY DEFENSE OF FORUM NON
CONVENIENS AND IRREVOCABLY AGREES TO BE BOUND BY ANY JUDGMENT RENDERED THEREBY
IN CONNECTION WITH THIS AGREEMENT.  Each party hereby agrees that service of all
process in any such proceeding in any such court may be made by registered or
certified mail, return receipt requested, to any party hereto, at its address
provided in this Agreement, such service being hereby acknowledged by each party
to be sufficient for personal jurisdiction in any action against such party in
any such court and to be otherwise effective and binding service in every
respect.  Nothing herein shall affect the right to serve process in any other
manner permitted by law.

          21.  WAIVER OF JURY TRIAL.  EACH OF THE PARTIES TO THIS AGREEMENT
               --------------------                                        
HEREBY AGREES TO WAIVE ITS RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR
CAUSE OF ACTION BASED UPON OR ARISING OUT OF 

                                       13

 
THIS AGREEMENT OR THE SUBJECT MATTER OF THIS AGREEMENT. The scope of this waiver
is intended to be all-encompassing of any and all disputes that may be filed in
any court and that relate to the subject matter of this Agreement, including,
without limitation, contract claims, tort claims, breach of duty claims and all
other common law and statutory claims. Each party hereto acknowledges that this
waiver is a material inducement to enter into a business relationship, that each
has already relied on this waiver in entering into this Agreement, and that each
shall continue to rely on this waiver in their related future dealings. Each
party hereto further warrants and represents that is has reviewed this waiver
with its legal counsel and that it knowingly and voluntarily waives its jury
trial rights following consultation with such legal counsel. THIS WAIVER IS
IRREVOCABLE, MEANING THAT IT MAY NOT BE MODIFIED EITHER ORALLY OR IN WRITING,
AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS
OR MODIFICATIONS TO THIS AGREEMENT. In the event of litigation, this Agreement
may be filed as a written consent to a trial by the court.


                           [SIGNATURES ON NEXT PAGE]

                                       14

 
     IN WITNESS WHEREOF, each of the parties hereto has executed this Agreement
as of the date and year first written above.

PARTNERSHIP:             FOUR EMBARCADERO CENTER VENTURE,
                         a California general partnership

                         By:  BOSTON PROPERTIES LLC,
                              a Delaware limited liability company,
                              as Managing General Partner

                              By:   BOSTON PROPERTIES LIMITED
                                    PARTNERSHIP, a Delaware limited
                                    partnership, as Manager

                                    By:  BOSTON PROPERTIES, INC.,
                                         a Delaware corporation,
                                         as General Partner



                                         By: /s/ Thomas J. O'Connor
                                            -------------------------
                                         Name: Thomas J. O'Connor
                                         Title: Vice President


BPLLC:                   BOSTON PROPERTIES LLC,
                         a Delaware limited liability company

                         By:  BOSTON PROPERTIES LIMITED
                              PARTNERSHIP, a Delaware limited
                              partnership, as Manager

                              By:   BOSTON PROPERTIES, INC.,
                                    a Delaware corporation,
                                    as General Partner



                                    By: /s/ Thomas J. O'Connor
                                       -------------------------
                                    Name: Thomas J. O'Connor
                                    Title: Vice President


                      [SIGNATURES CONTINUED ON NEXT PAGE]

                                      S-1

 
HOLDINGS LLC:            BP EC4 HOLDINGS LLC,
                         a Delaware limited liability company

                         By:  BOSTON PROPERTIES LIMITED
                              PARTNERSHIP, a Delaware limited
                              partnership, as Manager

                              By:   BOSTON PROPERTIES, INC.,
                                    a Delaware corporation,
                                    as General Partner



                                    By: /s/ Thomas J. O'Connor
                                       -------------------------
                                    Name: Thomas J. O'Connor
                                    Title: Vice President


PRUDENTIAL:              THE PRUDENTIAL INSURANCE COMPANY OF
                         AMERICA, a New Jersey corporation



                         By: /s/ Gary L. Frazier
                            -------------------------
                         Name:_______________________
                         Title:______________________

                                      S-2

 
                                   EXHIBIT A

                               DETERMINATION OF
                     FAIR MARKET VALUE OF INVESTMENT NOTES
                     -------------------------------------


     The Fair Market Value of each Investment Note shall equal the aggregate
Remaining Cash Flow for such Investment Note discounted from each respective
scheduled payment due date to the Redemption Date at a discount factor equal to
the Discount Rate for such Investment Note. Notwithstanding the foregoing, if on
the Determination Date an Investment Loan Borrower Credit Event exists, then the
Managing Partner shall appoint an investment banking firm of national
recognition (which will be satisfactory to Prudential in its reasonable
discretion) to determine the change in the Fair Market Value of the Investment
Notes for purposes of this Agreement.  In the event that an investment banking
firm is appointed to determine the change in the Fair Market Value of any
Investment Note as of the Determination Date pursuant to the preceding sentence,
such investment banking firm shall be instructed to determine the change in the
Fair Market Value of such Investment Note based on the following four factors:
(i) changes in market interest rates since the date of funding of the Investment
Note, (ii) the time period remaining from the Determination Date until the
earlier of the next Rate Reset Date of such Investment Note and the maturity of
the Investment Note, (iii) the Remaining Cash Flow (as defined below) of the
Investment Note, and (iv) changes in the credit quality of the Investment Note
since the date of funding thereof.  The parties agree that an acceptable
investment banking firm would be Goldman Sachs or Merrill Lynch & Company.  As
used herein, the term "INVESTMENT LOAN BORROWER CREDIT EVENT" shall mean any of
the following events: (x) the credit rating of the Investment Notes has been
downgraded from the credit rating of the Investment Notes on the date hereof by
both of the Rating Agencies, or (y) in the reasonable discretion of the Managing
Partner, there has been, as compared to the date hereof, a material diminution
or degradation in the value of the assets of the Investment Loan Borrower, or
the ability of the Investment Loan Borrower to pay its outstanding obligations,
as they become due from the date hereof.

                                 Defined Terms
                                 -------------

     As used herein, the following terms shall have the following meanings:

     "DETERMINATION DATE" shall mean the date upon which the Fair Market Value
of the Investment Notes is determined and shall occur at noon (New York City
time) on the third business day after the date that the Prudential Redemption
Notice or Partnership Redemption Notice, as the case may be, is received by the
addressee thereof.

     "DISCOUNT RATE" shall mean the Reinvestment Rate plus the Margin.

     "MARGIN" shall mean, with respect to any Investment Note, the Margin then
in effect (as defined in the Investment Loan Note Purchase Agreement) of such
Investment Note.

                                      A-1

 
     "RATING AGENCIES" shall mean Fitch IBCA, Inc. and Standard and Poor's
Corporation.

     "REINVESTMENT RATE" shall mean, with respect to any Investment Note, the
offered-side yield to maturity as of the Determination Date of the U.S. Treasury
security that was used to determine the then Treasury of such Investment Note.
Such offered-side yield to maturity shall be determined on or about noon on the
Determination Date and Prudential and the Partnership shall cooperate in the
determination of such Reinvestment Rate.

     "REMAINING CASH FLOW" shall mean, for any Investment Note, the aggregate
amount of all accrued and unpaid interest, principal and other payments under
such Investment Note on the Redemption Date and all principal, interest and
other payments that will become due and owing under such Investment Note from
time to time from and after the Redemption Date through (x) the next Rate Reset
Date of such Investment Note (the "NEXT RESET DATE"), if the Fair Market Value
is determined prior to such Rate Reset Date, or (y) the maturity of such
Investment Note (including, without limitation, any balloon or other principal
payments due and owing on said maturity date), if the Fair Market Value is
determined after all Rate Reset Dates provided in such Investment Note, as each
such payment would become due and payable pursuant to the terms of the
applicable Investment Note and the Investment Loan Documents (but assuming, if
clause (x) above applies, that any interest that is scheduled to be accrued but
- ----------                                                                     
unpaid as of the Next Reset Date (i.e., because the interest payment date with
                                  ----                                        
respect thereto will not have occurred), and any outstanding principal and any
other amounts scheduled to be owing under the Investment Note on such Next Reset
Date, will be repaid in full on the Next Reset Date; and further assuming, for
purposes of calculating all future interest payments due under such Investment
Note, that the interest rate in effect with respect to the Investment Note on
the Redemption Date will remain constant for purposes of determining the Fair
Market Value of such Investment Note).

                                      A-2

 
                                   EXHIBIT B

                                  CERTIFICATE
                           REGARDING INVESTMENT LOAN
                           -------------------------

          THIS CERTIFICATE (this "CERTIFICATE") is made and dated as of
______________, 1998 by FOUR EMBARCADERO CENTER VENTURE, a California general
partnership ("PARTNERSHIP"), for the benefit of THE PRUDENTIAL INSURANCE COMPANY
OF AMERICA, a New Jersey corporation ("PRUDENTIAL").

          Pursuant to that certain Redemption Agreement dated as of November 12,
1998 (the "REDEMPTION AGREEMENT"), the Partnership (and its partners other than
Prudential) and Prudential have been granted certain rights to cause
Prudential's interest in the Partnership to be fully redeemed in exchange for
the distribution of all or a portion of the Investment Notes and, if applicable
pursuant to the terms and provisions of the Redemption Agreement, cash to
Prudential. All capitalized terms used herein without definition shall have the
respective meanings given such terms in the Redemption Agreement.

          Concurrently herewith and on the date hereof, the Partnership is
distributing the Investment Notes (or a portion thereof) to Prudential in
accordance with the applicable terms and provisions of the Redemption Agreement.

          With respect to the distribution of such Investment Notes, the
Partnership hereby represents and warrants to Prudential as of the date hereof
as follows:

          (a)  Subject to the rights of The Prudential Insurance Company of
America or a permitted assignee or designee ("OPTIONEE") under that certain
Option and Put Agreement dated as of November 12, 1998 (the "OPTION AGREEMENT"),
the Partnership is the sole owner of the Investment Notes.  Further, the
Investment Notes delivered to Prudential on the date hereof pursuant to the
Redemption Agreement are free and clear of all liens and third party interests
of any kind or nature other than the interests and rights of Optionee under the
Option Agreement. The Partnership has not amended, modified, terminated or
otherwise by written agreement altered the Investment Notes or the Investment
Loan Documents except as specifically disclosed to Prudential in writing prior
to the date hereof and except for the division of any Investment Note pursuant
to Section 2(a) of the Redemption Agreement.

          (b)  The Partnership has not assigned or transferred the Investment
Notes or any of the Investment Loan Documents (except to secure the Equity
Redemption Loan, which assignment has been or simultaneously herewith is being,
released in full in writing), nor are there any agreements to assign or convey
any portion of the Investment Notes or such Investment Loan Documents to any
Person other than Prudential and Optionee (in accordance with the Option
Agreement).

                                      B-1

 
          (c)  The Partnership has all requisite power and authority to execute
and deliver all instruments and other documents to be executed and delivered by
the Partnership in connection with the distribution of the Investment Notes to
Prudential on the date hereof and to execute this Certificate.

          (d)  The Partnership is a duly formed general partnership under the
laws of the State of California, and is legally authorized to execute, deliver
and perform the Redemption Distribution and this Certificate, and this
Certificate is legal, valid and binding on the Partnership enforceable against
it in accordance with its terms, except to the extent that enforcement may be
limited by applicable bankruptcy, insolvency, moratorium and other principles
relating to or limiting the rights of contracting parties generally.

          (e)  The execution of this Certificate and the performance of the
Redemption Distribution by the Partnership will not conflict with or result in a
breach of any statute, rule, regulation, judgment, decree or order of any court,
board, committee or governmental agency to which the Partnership is subject, nor
violate any agreement or contract to which the Partnership is a party or by
which the Partnership is bound.  No consent, approval, authorization or order of
any court or governmental agency or body is required for the execution, delivery
and performance by the Partnership of, or compliance by the Partnership with,
the Certificate or the consummation of the Redemption Distribution, except for
such consents, approvals, authorizations or orders, if any, that have been
obtained.

          Each of the foregoing representations and warranties are personal to
Prudential and no Person other than Prudential shall be entitled to bring any
action based thereon.  Each of the foregoing representations and warranties
shall survive the consummation of the Redemption Distribution.

          The Partnership hereby acknowledges that the acceptance of the
Redemption Distribution and the Investment Notes by Prudential was made and will
have been made in material reliance by Prudential on the aforestated
representations and warranties of the Partnership.

                                      B-2

 
          IN WITNESS WHEREOF, the Partnership has caused its duly authorized
representative to execute this Certificate as of the date first above written.

PARTNERSHIP:             FOUR EMBARCADERO CENTER VENTURE,
                         a California general partnership

                         By:  BOSTON PROPERTIES LLC,
                              a Delaware limited liability company,
                              as Managing General Partner

                              By:   BOSTON PROPERTIES LIMITED
                                    PARTNERSHIP, a Delaware limited
                                    partnership, as Manager

                                    By:  BOSTON PROPERTIES, INC.,
                                         a Delaware corporation,
                                         as General Partner



                                         By:________________________
                                         Name:______________________
                                         Title:_____________________

                                      B-3

 
                                                                   EXHIBIT 99.19

                           OPTION AND PUT AGREEMENT



          THIS OPTION AND PUT AGREEMENT (this "AGREEMENT") is entered into as of
November 12, 1998, by and between ONE EMBARCADERO CENTER VENTURE, a California
general partnership ("OPTIONOR"), and THE PRUDENTIAL INSURANCE COMPANY OF
AMERICA, a New Jersey corporation ("PRUDENTIAL" and together with any permitted
assignee or designee hereunder hereinafter sometimes referred to as "OPTIONEE").

                                    RECITALS
                                    --------

          A.   Optionor is the "holder" of and "payee" under those certain
Senior Notes of even date herewith, executed and delivered by Prudential Realty
Securities, Inc., a Delaware corporation ("INVESTMENT LOAN BORROWER"), in the
aggregate principal amount of Eighty-Eight Million Two Hundred Thousand and
No/100 Dollars ($88,200,000.00) (the "INVESTMENT LOAN"), copies of which notes
are attached hereto as Exhibit A (the "INVESTMENT NOTES").  The Investment Notes
                       ---------                                                
were made pursuant to the Note Purchase Agreement of even date herewith, by and
between Optionor and Investment Loan Borrower (the "INVESTMENT LOAN NOTE
PURCHASE AGREEMENT").

          B.   Pursuant to that certain Redemption Agreement of even date
herewith, by and among Optionor, PIC Realty Corporation ("PIC"), Boston
Properties LLC and BP EC1 Holdings LLC (the "REDEMPTION AGREEMENT"), the
Investment Notes (or certain of the Investment Notes or portions thereof as
provided in accordance with the terms and provisions of the Redemption
Agreement) may be distributed (together with cash, if necessary pursuant to the
Redemption Agreement) to PIC in full redemption of its partnership interest in
Optionor.  The date on which such Investment Notes (or portions thereof) are
distributed to PIC and PIC's partnership interest in the Optionor is fully
redeemed (such that PIC is no longer a partner or constituent of Optionor)
pursuant to the Redemption Agreement shall be referred to in this Agreement as
the "REDEMPTION DATE".

          C.   Pursuant to certain terms, provisions and conditions of the
Redemption Agreement, less than the entire principal face amount of all
Investment Notes may be distributed to PIC on the Redemption Date.  In such
event, the Optionor may retain, as payee, a portion of the aggregate principal
amount of all Investment Notes (the "REMAINDER") after the Redemption Date,
which Remainder will be evidenced by one or more of the Investment Notes that
are retained by Optionor pursuant to the Redemption Agreement and, if applicable
pursuant to the terms and provisions of the Redemption Agreement and the
Investment Loan Note Purchase Agreement, a new promissory note issued by the
Investment Loan Borrower in accordance with Section 2 of the Redemption
Agreement, all of which notes shall have an aggregate principal amount equal to
the Remainder (collectively, the "REMAINDER NOTES").  All documents and
instruments evidencing, securing or relating to the Investment Notes or
Remainder Notes (including, without limitation,

                                       1

 
the Investment Loan Note Purchase Agreement) shall be herein referred to as the
"INVESTMENT LOAN DOCUMENTS".

          D.   Optionee desires to acquire an option to purchase and acquire
Optionor's entire interest in, to and under any such Remainder Notes and
Optionor is willing to grant such option, and Optionor desires to acquire a put
right to cause Optionee to purchase and acquire Optionor's entire interest in,
to and under any such Remainder Notes and Optionee is willing to grant such put
right to Optionor, all upon the terms and conditions hereinafter set forth.

                                   AGREEMENT
                                   ---------

          NOW, THEREFORE, in consideration of the benefits accruing to the
parties hereto, and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged by Optionor and Optionee, Optionor
and Optionee hereby agree as follows:

          1.   OPTION.
               ------ 

          (A) Grant of Option.  Optionor hereby unconditionally and irrevocably
              ---------------                                                  
grants, conveys, transfers and assigns to Optionee (or its designee) the
exclusive option and right to, subject to the terms and provisions of this
Agreement, acquire Optionor's entire right, title and interest in, to and under
all Remainder Notes in accordance with and subject to the terms and conditions
of this Agreement; provided that, Optionee shall assume all of Optionor's
                   -------- ----                                         
duties, obligations and liabilities arising under the Remainder Notes and the
Investment Loan Documents (but only to the extent the same relate to the
Remainder Notes) accruing from and after the Closing Date (the "OPTION").

          (B) Term and Exercise of Option.  Optionee may exercise the Option at
              ---------------------------                                      
any time from and after the Redemption Date and on or before 6:00 p.m pacific
coast time on the earlier of (x) the date which is one hundred and sixty-five
(165) days after the Redemption Date and (y) August 31, 2002 (the "OPTION
ELECTION PERIOD") by giving Optionor no less than ten (10) business days'
written notice of exercise (the "OPTION ELECTION NOTICE"); provided that,
                                                           -------- ---- 
notwithstanding the foregoing, Optionee's right to give an Option Election
Notice and to purchase the Remainder Notes pursuant to its option shall be
suspended during any period of time while there exists an "Investment Loan
Borrower Credit Event" (as defined in Exhibit B attached hereto).  The Option
                                      ---------                              
Election Notice shall include (i) the proposed closing date, which shall not be
less than ten (10) business days after the delivery thereof nor more than twenty
(20) business days after the delivery thereof, and (ii) the Optionee's
calculation of the Fair Market Value (as defined in Section 3 below) of the
                                                    ---------              
Remainder Notes based on the proposed closing date.  In the event that the
Option is not exercised on or before the expiration of the Option Election
Period, or the transaction has not closed within twenty (20) business days after
the expiration of the Option Election Period for any reason other than the
default of the Optionor, then the Option shall become null and void and of no
further force or effect, and the parties hereto shall be released from all
further liabilities and obligations hereunder with respect to the Option (except
as otherwise expressly provided herein).

                                       2

 
          (C)  Option Fee.  No later than three (3) calendar days after the
               ----------                                                  
execution of this Agreement by Optionor and Optionee, Optionee shall pay to
Optionor the sum of One Hundred Dollars ($100) (the "OPTION FEE").  The Option
Fee is non-refundable (except as otherwise expressly provided in this
Agreement); provided that, the Option Fee shall be credited against the Purchase
            -------- ----                                                       
Price (as defined in Section 3 below) payable at Closing (as defined in Section
                     ---------                                          -------
4(a) below).
- ----        

          2.   PUT.
               --- 

          (A)  Grant of Put.  Optionee hereby unconditionally and irrevocably
               ------------                                                  
grants, conveys, transfers and assigns to Optionor the exclusive right to,
subject to the terms and provisions of this Agreement, put and sell to Optionee
Optionor's entire right, title and interest in, to and under all Remainder Notes
in accordance with and subject to the terms and conditions of this Agreement
(the "PUT").  Optionee shall be obligated to acquire such Remainder Notes upon
the exercise of Optionor's Put and to assume all of Optionor's duties,
obligations and liabilities arising under the Remainder Notes and the Investment
Loan Documents (but only to the extent the same relate to the Remainder Notes)
accruing from and after the Closing Date.  In the event that Optionor exercises
its Put, the Option Fee shall be credited against the Purchase Price payable at
Closing.

          (B)  Term and Exercise of Put.  Optionor may exercise the Put at any
               ------------------------                                       
time during the Put Period (defined immediately below) by giving Optionee no
less than ten (10) business days' written notice of exercise (the "PUT ELECTION
NOTICE") at any time prior to the expiration of the Put Period; provided that,
                                                                -------- ---- 
notwithstanding the foregoing, Optionor's right to give a Put Election Notice
and to put the Remainder Notes to Optionee pursuant to this Agreement shall be
suspended during any period of time while the Remainder Notes have been
accelerated and such acceleration has not been rescinded by the holders of the
Remainder Notes.  The Put Election Notice shall include (i) the proposed closing
date, which shall not be less than ten (10) business days after the delivery
thereof nor more than twenty (20) business days after the delivery thereof, and
(ii) the Optionor's calculation of the Fair Market Value of the Remainder Notes
based on the proposed closing date.  In the event that the Put is not exercised
prior to the expiration of the Put Period, and the transaction has not closed on
or before the date which is twenty (20) business days after the expiration of
the Put Period for any reason other than the default of the Optionee, then the
Put shall become null and void and of no further force or effect, and the
parties hereto shall be released from all further liabilities and obligations
hereunder with respect to the Put (except as otherwise expressly provided
herein).  As used herein, the "PUT PERIOD" shall mean the period of time
commencing on the thirty-first (31st) day after the expiration of the Option
Election Period and expiring at 6:00 p.m. pacific coast time on the thirtieth
(30th) day thereafter.

          3.   PURCHASE PRICE.  The total purchase price ("PURCHASE PRICE")
               --------------                                              
which Optionee shall pay to Optionor for the Remainder Notes upon the exercise
of the Option or Put shall be the Fair Market Value of such Remainder Notes on
the date of Closing.  At Closing, Optionee shall pay to Optionor the entire
balance of the Purchase Price, over and above the Option

                                       3

 
Fee previously paid to Optionor and credited to the Purchase Price in accordance
with the terms and provisions of Sections 1(c) and 2(a) above (provided that the
                                 -------------     ----
parties acknowledge and agree that no interest or other income earned by
Optionor on the Option Fee shall be credited against the Purchase Price), by
wire transfer of immediately available funds. The "FAIR MARKET VALUE" of the
Remainder Notes shall be calculated and determined as of the Closing Date as
provided in Exhibit B attached hereto.
            --------- 

          4.   CLOSING.
               ------- 

          (A)  Closing.  Upon exercise of the Option or Put as provided in (and
               -------                                                         
in accordance with) any of Sections 1 or 2 above, the purchase and sale of the
                           ----------    -                                    
Remainder Notes shall close on the closing date specified in the Option Election
Notice or Put Election Notice, as applicable, in accordance with the terms of
Sections 1(b) and 2(b), respectively (the "CLOSING DATE").  As used herein, the
- -------------     ----                                                         
term "CLOSING" means the date and time that the Purchase Price due under Section
                                                                         -------
3 above is paid to Optionor for the Remainder Notes, and the Remainder Notes are
- -                                                                               
endorsed to the order of Optionee and all other documents and instruments of
transfer and assumption are executed and delivered by the parties in accordance
with the terms and provisions of subsection (b) below.
                                 --------------       

          (B)  Closing Procedure.  The sale of the Remainder Notes shall be
               -----------------                                           
consummated on the Closing Date as follows:

               (I)    On or before the Closing Date, Optionor shall execute and
     deliver to Optionee (A) an Allonge to each Remainder Note in the form of
     Exhibit C attached hereto (the "ALLONGE"); (B) counterpart originals of an
     ---------                                                                 
     Assignment and Assumption of Loan in the form of Exhibit D attached hereto
                                                      ---------                
     (the "ASSIGNMENT"), executed by Optionor; and (C) the original Remainder
     Notes and originals or copies of all other Investment Loan Documents in
     Optionor's possession or within its control.

               (II)   On or before the Closing Date, Optionee shall deliver to
     Optionor, (A) in immediately available funds the Purchase Price (less the
     Option Fee) and such additional amounts as may be required to satisfy
     Optionee's share of any Closing costs; and (B) counterpart originals of the
     Assignment, executed by Optionee.

               (III)  All reasonable Closing and escrow fees and costs incurred
     in connection with the transactions described in this Agreement shall be
     paid fifty percent (50%) by Optionor and fifty percent (50%) by Optionee;
     provided that, each party hereto shall bear the expense of its own counsel.
     -------- ----                                                              

          5.   OPTIONOR'S REPRESENTATIONS AND WARRANTIES.  Optionor hereby
               -----------------------------------------                  
represents and warrants to Optionee as of the date hereof and as of the Closing
Date as follows:

                                       4

 
          (A)  Subject to the rights of PIC under the Redemption Agreement,
Optionor is the sole owner of the Investment Notes on the date hereof, and on
the Closing Date, Optionor shall be the sole owner of the Remainder Notes.
Further, the Investment Notes are free and clear of all liens and third party
interests on the date hereof (other than the interests and rights in favor of
PIC under the Redemption Agreement and any pledge of the Investment Notes
securing the Equity Redemption Loan (as defined in the Redemption Agreement)),
and on the Closing Date, the Remainder Notes shall be free and clear of all
liens and third party interests of any kind or nature, except as created by this
Agreement.  Optionor has not amended, modified, terminated or otherwise by
written agreement altered the Investment Notes or other Investment Loan
Documents except as specifically disclosed to Optionee in writing prior to the
date hereof, and on the Closing Date, except as otherwise amended, modified or
altered in connection with the transactions contemplated in the Redemption
Agreement, Optionor shall not have amended, modified, terminated or otherwise
altered the Investment Notes, Remainder Notes or other Investment Loan Documents
without Optionee's written consent obtained in accordance with Section 7 hereof.
                                                               ---------        

          (B)  As of the date hereof, Optionor has not assigned or transferred
the Investment Notes or any of the other Investment Loan Documents (except for
any pledge of the Investment Notes securing the Equity Redemption Loan), nor are
there any agreements to assign or convey any portion of such Investment Loan
Documents to any person other than Optionee and PIC in accordance with this
Agreement and the Redemption Agreement, respectively.  On the Closing Date,
Optionor shall not have assigned or transferred the Remainder Notes or any of
the other Investment Loan Documents (except for such portion of the Investment
Notes transferred to PIC in accordance with the Redemption Agreement), nor shall
there be any agreements to assign or convey the Remainder Notes or any portion
of such Investment Loan Documents to any person other than Optionee (except with
respect to PIC's rights under the Redemption Agreement).

          (C)  To Optionor's knowledge, Optionor has all requisite power and
authority to execute and deliver, and to perform all of its obligations under,
this Agreement and all instruments and other documents to be executed and
delivered to Optionee in connection with the transactions described herein.

          (D)  To Optionor's knowledge, Optionor is a duly formed general
partnership under the laws of the State of California, and this Agreement, and
all the instruments and documents to be executed and delivered by Optionor in
connection herewith, are legal, valid and binding obligations of Optionor
enforceable against it in accordance with their respective terms, except to the
extent that enforcement may be limited by applicable bankruptcy, insolvency,
moratorium and other principles relating to or limiting the rights of
contracting parties generally.

          (E)  To Optionor's knowledge, the execution of this Agreement and the
performance of Optionor's obligations hereunder will not conflict with or result
in a breach of any statute, rule, regulation, judgment, decree or order of any
court, board, committee or governmental agency to which Optionor is subject, nor
violate any agreement or contract to which Optionor is a party or by which
Optionor is bound.  To Optionor's knowledge, no consent, approval, authorization
or

                                       5

 
order of any court or governmental agency or body is required for the execution,
delivery and performance by Optionor of, or compliance by Optionor with, this
Agreement or the consummation of the transactions contemplated by it, except for
such consents, approvals, authorizations or orders, if any, that have been
obtained.

Each of the foregoing representations and warranties shall survive the Closing
for a period of twelve (12) months immediately thereafter.

          6.   OPTIONEE'S REPRESENTATIONS, WARRANTIES AND ACKNOWLEDGMENTS.
               ---------------------------------------------------------- 
Optionee hereby represents, warrants and acknowledges to Optionor as of the date
hereof and as of the Closing Date as follows:

          (A)  Optionee is a corporation duly organized, validly existing and in
good standing under the laws of the State of New Jersey.  Optionee has all
requisite power and authority to execute and deliver, and to perform all of its
obligations under, this Agreement and all instruments and other documents
executed and delivered by Optionee in connection with the transactions
contemplated herein.  This Agreement, and all the instruments and documents to
be executed and delivered by Optionee in connection herewith, are legal, valid
and binding obligations of Optionee enforceable against it in accordance with
their respective terms, except to the extent that enforcement may be limited by
applicable bankruptcy, insolvency, moratorium and other principles relating to
or limiting the rights of contracting parties generally.

          (B)  The execution, delivery and performance of this Agreement has
been duly authorized by all necessary action on the part of Optionee and does
not require any consent or approval of any party that has not been obtained.

          (C)  The execution of this Agreement and the performance of Optionee's
obligations hereunder will not conflict with or result in a breach of any
statute, rule, regulation, judgment, decree or order of any court, board,
committee or governmental agency to which Optionee is subject, nor violate any
agreement or contract to which Optionee is a party or by which Optionee is
bound.  No consent, approval, authorization or order of any court or
governmental agency or body is required for the execution, delivery and
performance by Optionee of, or compliance by Optionee with, this Agreement or
the consummation of the transactions contemplated by it, except for such
consents, approvals, authorizations or orders, if any, that have been obtained.

          (D)  Optionee has made, and will make, prior to the Closing, such
examination, review and investigation of the facts and circumstances as
necessary to evaluate the Remainder Notes.  Optionee further acknowledges that
in acquiring the Remainder Notes, Optionee is assuming the risk of full or
partial loss which is inherent with the credit, collateral and collectibility
risks associated with the quality and character of the loan evidenced by the
Remainder Notes.

                                       6

 
          (E)  Optionee is an "accredited investor" as defined in Regulation D
under the Securities Act of 1933, as amended.  The Remainder Notes will be
acquired by Optionee for its own account for investment only and not with a view
to, or with any intention of, a distribution or resale thereof, in whole or in
part.

          (F)  Optionee has not relied upon any representations, warranties or
statements of any kind made by, or on behalf of, Optionor, except as
specifically set forth in this Agreement. Optionee acknowledges that, except for
the express representations and warranties by Optionor set forth in, or to be
made in instruments delivered pursuant to, this Agreement, Optionor negates and
disclaims all representations, warranties and statements of every kind or type
(express or implied) and, except for the Optionor's representations and
warranties set forth herein, the Remainder Notes are being acquired "as is" with
no recourse to Optionor for any default thereunder or diminution in value with
respect thereto.

Each of the foregoing representations and warranties shall survive the Closing
for a period of twelve (12) months immediately thereafter.

          7.   COVENANTS.  Optionor hereby covenants and agrees that, from and
               ---------                                                      
after the date hereof, except as otherwise contemplated in and permitted by the
Redemption Agreement, Optionor will not, without Optionee's prior written
consent, (a) amend, modify, cancel or terminate, any of the Investment Notes,
Remainder Notes or Investment Loan Documents in any manner which will adversely
affect or impact the interest of the "payee" under the Remainder Notes and
Investment Loan Documents if and when such Remainder Notes are transferred to
Optionee, (b) waive, relinquish or allow to lapse any right of Optionor as
"lender/payee" under the Investment Notes, Remainder Notes or Investment Loan
Documents which will in any manner adversely affect or impact the interest of
the "payee" under the Remainder Notes and other Investment Loan Documents if and
when such Remainder Notes are transferred to Optionee, or (c) agree or consent
to any agreements or understandings that will impact the Remainder Notes if and
when such Remainder Notes are transferred to Optionee.  In furtherance of the
foregoing, except for the transfer of Investment Notes to PIC pursuant to the
Redemption Agreement and any pledge of the Investment Notes to secure the Equity
Redemption Loan, Optionor shall not sell, assign or otherwise transfer any of
the Investment Notes or Remainder Notes prior to the expiration of the Option
Election Period; provided that, (i) Optionor shall be permitted to transfer any
                 -------- ----                                                 
Remainder Notes after the "Redemption Distribution" under the Redemption
Agreement subject to this Agreement, and (ii) all restrictions on the
transferability of the Investment Notes and Remainder Notes shall cease upon the
expiration of the Option Election Period and Optionor shall thereafter be
permitted to freely transfer the Investment Notes and/or Remainder Notes without
restriction.  Upon written request by either party at or prior to the Closing,
the other party shall give to the requesting party written notice of any newly
discovered information that causes any of the representations or warranties of
such responding party made in this Agreement to be materially untrue or
incorrect, or of the occurrence of any event or circumstance that would
materially modify or affect the substance of such representations and
warranties.

                                       7

 
          8.   CONFIDENTIALITY; PRESS RELEASES.  Each party hereto hereby agrees
               -------------------------------                                  
that, except as required by law or the regulations of an exchange on which
securities of such party are listed or unless compelled by an order of a court,
and except for such disclosures to each party's lenders, consultants, attorneys,
prospective investors, agents, assignees, partners, officers, directors,
employees and advisors as may be necessary or advisable in connection with the
consummation of the transactions contemplated herein (provided each such person
is instructed to comply with the terms of this confidentiality provision), it
shall keep the contents of this Agreement and the transactions contemplated
hereby confidential and further agrees to refrain from generating or
participating in any publicity statement, press release, or other public notice
regarding this Agreement or the transactions contemplated hereby, without the
prior written consent of the other party, which consent shall not be
unreasonably withheld.  The terms and provisions of this Section 8 shall survive
                                                         ---------              
the Closing or any termination of this Agreement and shall not be merged into
any instrument or conveyance delivered at the Closing.

          9.   COMMISSIONS.  Optionor and Optionee each agrees to indemnify,
               -----------                                                  
defend, protect and hold the other harmless from and against any and all
commissions, finder's and/or similar fees or compensation claimed by any broker
or finder in connection with Optionee's purchase of the Remainder Notes based on
claimed contacts with, or other acts or omissions of, such indemnifying party.
The terms and provisions of this Section 9 shall survive the Closing or
                                 ---------                             
termination of this Agreement.

          10.  REMEDIES.  In the event of any material breach by either party to
               --------                                                         
this Agreement, the remedy at law in favor of the other party may be inadequate
and such other party, in addition to all other rights and remedies which may be
available to it at law or in equity, shall have the right of specific
performance in the event of any material breach, or injunction in the event of
an anticipatory material breach, of this Agreement by the other party.
Furthermore, upon the material breach of this Agreement by any party, the other
party shall have the right to terminate this Agreement and to recover its
damages, and, upon a material breach by Optionor, Optionee shall also have the
right to receive a refund of the Option Fee.  Such refund of the Option Fee
shall be in addition to, and not in lieu of, any other remedies which Optionee
may have against Optionor at law or in equity arising from Optionor's breach.

          11.  INDEMNIFICATION.  Optionor hereby agrees to indemnify, protect,
               ---------------                                                
defend, save and hold harmless Optionee, and Optionee's trustees, officers,
directors, shareholders, beneficiaries, members, partners, agents, employees,
investment advisors and independent contractors from and against any and all
duties, obligations, liabilities, suits, claims, demands, causes of action,
costs and expenses (including, without limitation, reasonable attorneys' fees
and costs), arising out of a breach by the Optionor of any of its
representations and warranties made in Section 5.  Optionee hereby agrees to
                                       ---------                            
indemnify, protect, defend, save and hold harmless Optionor, and Optionor's
trustees, officers, directors, shareholders, beneficiaries, members, partners,
agents, employees, investment advisors and independent contractors from and
against any and all duties, obligations, liabilities, suits, claims, demands,
causes of action, costs and expenses (including, without limitation, reasonable
attorneys' fees and costs), arising out of a

                                       8

 
breach by the Optionee of any of its representations and warranties made in
Section 6. The terms and provisions of this Section 11 shall survive the Closing
- ---------                                   ----------
or the termination of this Agreement for a period of twelve (12) months
immediately thereafter.

          12.  ESCROW INSTRUCTIONS.  Upon the request of either Optionor or
               -------------------                                         
Optionee, the parties hereto shall execute and deliver any and all escrow
documents reasonably approved by such party and perform any and all acts
reasonably necessary or appropriate to open and enter into an escrow in order to
consummate the transactions contemplated herein.  Such agreements may include,
without limitation, customary escrow instructions (including, without
limitation, standard general terms and conditions to the extent the appointed
escrow agent demands such provisions in order to serve as escrow agent), as may
be reasonably necessary or desirable in order to enable the escrow agent to
comply with the terms of this Agreement.  The escrow agent shall be selected by
the party making the request for an escrow (and shall not be affiliated with
such party), but shall be subject to the written approval of the other party,
which approval shall not be unreasonably withheld or delayed.  The parties shall
share equally the costs and expenses of the escrow and escrow agent.

          13.  MISCELLANEOUS.
               ------------- 

          (A)  Authority.  Each individual and entity executing this Agreement
               ---------                                                      
represents and warrants that he, she or it has the capacity set forth on the
signature pages hereof with full power and authority to bind the party on whose
behalf he, she or it is executing this Agreement to the terms hereof.

          (B)  Further Assurances.  Optionor and Optionee shall each execute and
               ------------------                                               
deliver to the other such further documents and instruments as may be reasonably
requested by either of them in order to effectuate the intent of this Agreement
and to obtain the full benefit of this Agreement.  Any request by either party
under this Section 13(b) shall be accompanied by the document proposed for
           -------------                                                  
signature by the party requesting it, in form and substance satisfactory to the
party of whom the request is made and its attorneys.  The party making the
request shall bear and discharge any fees or expenses incident to the
preparation, filing or recording of the document requested pursuant to this
Section 13(b).
- ------------- 

          (C)  Time of the Essence. Time is of the essence in the performance
               -------------------
               of and compliance with each of the provisions of this Agreement.

          (D)  Governing Law.  This Agreement shall be governed by and
               -------------                                          
interpreted in accordance with the laws of the State of California, without
reference to California's conflicts or choice of law principles.

          (E)  Entire Agreement.  THIS AGREEMENT, THE MASTER TRANSACTION
               ----------------                                         
AGREEMENT OF EVEN DATE HEREWITH, BY AND AMONG PRUDENTIAL, PIC, CERTAIN PERSONS
LISTED ON EXHIBIT A THERETO, FEDMARK CORPORATION,

                                       9

 
EMBARCADERO CENTER INVESTORS PARTNERSHIP, PACIFIC PROPERTY SERVICES, L.P.,
BOSTON PROPERTIES LIMITED PARTNERSHIP AND BOSTON PROPERTIES, INC. AND ALL
TRANSACTION DOCUMENTS DESCRIBED THEREIN (COLLECTIVELY, THE "TRANSACTION
DOCUMENTS") REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE
CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENT
OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES. The
parties make no representations or warranties to each other, except as
specifically contained in this Agreement or in the accompanying exhibits or the
certificates or other closing documents delivered according to this Agreement or
in the other Transaction Documents. All prior agreements and understanding
between the parties hereto with respect to the transactions contemplated hereby,
whether verbal or in writing, are superseded by, and are deemed to have been
merged into, this Agreement and all other Transaction Documents. Any waiver,
modification, consent or acquiescence with respect to any provision of this
Agreement shall be set forth in writing and duly executed by or in behalf of the
party to be bound thereby. No waiver by any party of any breach hereunder shall
be deemed a waiver of any other or subsequent breach.

          (F)  Modifications.  This Agreement may not be changed, waived,
               -------------                                             
discharged or terminated orally, but only by an instrument in writing signed by
the party against which enforcement of such change, waiver, discharge or
termination is sought.

          (G)  Severability.  If any provision of this Agreement shall be
               ------------                                              
determined to be invalid, illegal or unenforceable, the balance of this
Agreement shall remain in full force and effect and if any provision is
inapplicable to any person or circumstance, it shall nevertheless remain
applicable to all other persons and circumstances.

          (H)  Assignee; Designee.  Optionee may assign this Agreement or
               ------------------                                        
designate a designee to acquire Optionor's entire right, title and interest in
and to the Remainder Notes at any time prior to the Closing; provided that, in
                                                             -------- ----    
no event shall Prudential be released from any of the obligations or liabilities
of the "Optionee" hereunder without the prior written consent of Optionor.  This
Agreement may not otherwise be assigned, nor may any interest herein be
assigned, by Optionee without Optionor's prior written consent.

          (I)  Notices.  All notices, elections, consents, approvals, demands,
               -------                                                        
objections, requests or other communications which any party hereto may be
required or desire to give to the other party hereto must be in writing and sent
by (i) first class U.S. certified or registered mail, return receipt requested,
with postage prepaid, (ii) telecopy or facsimile (with a copy sent by first
class U.S. certified or registered mail, return receipt requested, with postage
prepaid), or (iii) express mail or a nationally recognized courier (for next
business day delivery).  A notice or other communication sent in compliance with
the provisions of this Section 13(i) shall be deemed given and received on (a)
                       -------------                                          
the third (3rd) day following the date it is deposited in the U.S. mail, (b) the
date of confirmed dispatch if sent by facsimile or telecopy (provided that a
copy thereof is sent by

                                       10

 
mail in the manner provided in clause (i) above), or (c) the date it is
                               ---------- 
delivered to the other party if sent by express mail or courier. The addresses
for the parties are as follows:

          All notices and other communications to Optionor shall be given to it
at:

          c/o Boston Properties, Inc.
          8 Arlington Street
          Boston, Massachusetts 02116-3495
          Attention:  General Counsel
          Facsimile No.:  (617) 421-1555

          with a copy to:

          Goulston & Storrs, P.C.
          400 Atlantic Avenue
          Boston, Massachusetts 02110-3333
          Attention:  Eli Rubenstein, Esq.
          Facsimile No.:  (617) 574-4112

          All notices and other communications to Optionee shall be given to it
at:

          The Prudential Insurance Company of America
          Prudential Realty Group
          8 Campus Drive, 4th Floor
          Arbor Circle South
          Parsippany, New Jersey 07054
          Attention:  John R. Triece
          Facsimile No.:  (201) 734-1472

          with a copy to:

          The Prudential Insurance Company of America
          Prudential Capital Group
          Four Embarcadero Center
          Suite 2700
          San Francisco, California 94111
          Attention:  Harry N. Mixon, Esq.
          Facsimile No.:  (415) 956-2197

          and a copy to:

          O'Melveny & Myers LLP
          Embarcadero Center West

                                       11

 
          275 Battery Street
          Suite 2600
          San Francisco, California 94111
          Attention:   Stephen A. Cowan, Esq.
          Facsimile No.:   (415) 984-8701

Any party may designate another addressee or change its address for notices and
other communications hereunder by a notice given to the other parties in the
manner provided in this Section 13(i).
                        ------------- 

          (J)  Attorneys' Fees. If any action is brought by either party against
               ---------------
the other party relating to or arising out of this Agreement, the transactions
described herein or the enforcement hereof, the prevailing party shall be
entitled to recover from the other party reasonable attorneys' fees and costs
incurred in connection with the prosecution or defense of such action. For
purposes of this Agreement, the term "ATTORNEYS' FEES" or "ATTORNEYS' FEES AND
COSTS" shall mean the fees and expenses of counsel to the parties hereto, which
may include printing, photostating, duplicating and other expenses, air freight
charges, and fees billed for law clerks, paralegals and other persons not
admitted to the bar but performing services under the supervision of an
attorney, and the costs and fees incurred in connection with the enforcement or
collection of any judgment obtained in any such proceeding.

          (K)  Counterparts.  This Agreement may be executed in one or more
               ------------                                                
counterparts, each of which shall constitute an original, but all of which, when
taken together, shall constitute only one instrument.  The signature page of any
counterpart may be detached therefrom without impairing the legal effect of the
signature(s) thereon provided such signature page is attached to any other
counterpart identical thereto except having additional signature pages executed
by other parties to this Agreement attached thereto.

          (L)  Successors and Assigns.  This Agreement shall be binding upon and
               ----------------------                                           
inure to the benefit of each of the parties hereto and to their respective
permitted transferees, successors and assigns.

          (M)  Exhibits.  All Exhibits attached hereto are hereby incorporated
               --------                                                       
herein.

          (N)  No Third Party Beneficiaries. Persons who are not parties to this
               ----------------------------
Agreement shall have no rights or privileges (whether as a third party
beneficiary or otherwise) under or by virtue of this Agreement.

          (O)  Business Days.  In the event that any of the dates specified in
               -------------                                                  
this Agreement shall fall on a Saturday, Sunday, or a holiday recognized by the
State of California or the Commonwealth of Massachusetts, then the date of such
action shall be deemed to be extended to the next business day.

                                       12

 
          (P) Consent to Jurisdiction and Service of Process.  ALL JUDICIAL
              ----------------------------------------------               
PROCEEDINGS BROUGHT AGAINST ANY PERSON ARISING OUT OF OR RELATING TO THIS
AGREEMENT MAY BE BROUGHT IN ANY STATE OR FEDERAL COURT OF COMPETENT JURISDICTION
IN THE STATE OF CALIFORNIA, AND BY EXECUTION AND DELIVERY OF THIS AGREEMENT EACH
PARTY HERETO ACCEPTS FOR ITSELF, GENERALLY AND UNCONDITIONALLY, THE NONEXCLUSIVE
JURISDICTION OF THE AFORESAID COURTS AND WAIVES ANY DEFENSE OF FORUM NON
CONVENIENS AND IRREVOCABLY AGREES TO BE BOUND BY ANY JUDGMENT RENDERED THEREBY
IN CONNECTION WITH THIS AGREEMENT.  Each party hereby agrees that service of all
process in any such proceeding in any such court may be made by registered or
certified mail, return receipt requested, to any other party hereto, at its
address provided in this Agreement, such service being hereby acknowledged by
each party to be sufficient for personal jurisdiction in any action against such
party in any such court and to be otherwise effective and binding service in
every respect.  Nothing herein shall affect the right to serve process in any
other manner permitted by law.

          (Q) Waiver of Jury Trial.  EACH OF THE PARTIES TO THIS AGREEMENT
              --------------------                                        
HEREBY AGREES TO WAIVE ITS RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR
CAUSE OF ACTION BASED UPON OR ARISING OUT OF THIS AGREEMENT OR ANY DEALINGS
RELATING TO THE SUBJECT MATTER OF THIS AGREEMENT. The scope of this waiver is
intended to be all-encompassing of any and all disputes that may be filed in any
court and that relate to the subject matter of this transaction, including,
without limitation, contract claims, tort claims, breach of duty claims and all
common law and statutory rights.  Each party hereto acknowledges that this
waiver is a material inducement to enter into a business relationship, that each
has already relied on this waiver in entering into this Agreement, and that each
shall continue to rely on this waiver in their related future dealings.  Each
party hereto further warrants and represents that it has reviewed this waiver
with its legal counsel and that it knowingly and voluntarily waives its jury
trial rights following consultation with such legal counsel.  THIS WAIVER IS
IRREVOCABLE, MEANING THAT IT MAY NOT BE MODIFIED EITHER ORALLY OR IN WRITING,
AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS
OR MODIFICATIONS OF THIS AGREEMENT.  In the event of litigation, this Agreement
may be filed as a written consent to a trial by the court.



                           [SIGNATURES ON NEXT PAGE]

                                       13

 
          IN WITNESS WHEREOF, the undersigned have duly executed this Agreement
as of the date first above written.

                              "OPTIONOR"

                              ONE EMBARCADERO CENTER VENTURE, a
                              California General Partnership

                              By:   BOSTON PROPERTIES LLC,
                                    a Delaware limited liability company,
                                    as Managing General Partner

                                    By:  BOSTON PROPERTIES LIMITED
                                         PARTNERSHIP, a Delaware limited
                                         partnership, as Manager

                                         By:  BOSTON PROPERTIES,
                                              INC., a Delaware corporation,
                                              as General Partner



                                              By: /s/ Thomas J. O'Connor
                                                 -----------------------
                                              Name: Thomas J. O'Connor
                                              Title: Vice President


                              "OPTIONEE"

                              THE PRUDENTIAL INSURANCE COMPANY
                              OF AMERICA, a New Jersey corporation



                              By: /s/ Gary L. Frazier
                                  ----------------------------------
                              Name: ________________________________
                              Title: _______________________________

                                      S-1

 
                                    JOINDER


          The undersigned, as maker of the Remainder Notes, agrees that on the
Closing Date, at the request of Optionor, it will execute the Joinder and
Release on the Assignment and Assumption of Loan in the form attached hereto as
Exhibit D, which will be executed at such Closing.
- ---------                                         


                              PRUDENTIAL REALTY SECURITIES, INC.,
                              a Delaware corporation



                              By: /s/ Paul D. Egan
                                  ----------------------------------------------
                              Name: Paul D. Egan
                              Title: Vice President

                                      S-2

 
                                   EXHIBIT A

                                INVESTMENT NOTES
                                ----------------

                                      A-1

 
                                   EXHIBIT B

                                 CALCULATION OF
                               FAIR MARKET VALUE
                               -----------------


     The Fair Market Value of the Remainder Notes shall equal the aggregate
Remaining Cash Flow for all Remainder Notes discounted from each respective
scheduled payment due date to the Closing Date at a discount factor equal to the
Discount Rate for each such Remainder Note.  Notwithstanding the foregoing, if
on the Determination Date an Investment Loan Borrower Credit Event exists, then
Optionor shall appoint an investment banking firm of national recognition (which
will be satisfactory to Optionee in its reasonable discretion) to determine the
change in the Fair Market Value of the Remainder Notes for purposes of this
Agreement.  In the event that an investment banking firm is appointed to
determine the change in the Fair Market Value of any Remainder Note as of the
Determination Date pursuant to the preceding sentence, such investment banking
firm shall be instructed to determine the change in the Fair Market Value of
such Remainder Note based on the following four factors: (i) changes in market
interest rates since the date of funding of the Remainder Note, (ii) the time
period remaining from the Determination Date until the earlier of the next Rate
Reset Date of such Remainder Note and the maturity of the Remainder Note, (iii)
the Remaining Cash Flow (as defined below) of the Remainder Note, and (iv)
changes in the credit quality of the Remainder Note since the date of funding
thereof.  The parties agree that an acceptable investment banking firm would be
Goldman Sachs or Merrill Lynch.  As used herein, the term "INVESTMENT LOAN
BORROWER CREDIT EVENT" shall mean any of the following events: (x) the credit
rating of the Remainder Notes has been downgraded from the credit rating of the
Remainder Notes on the date hereof by both of the Rating Agencies, or (y) in the
reasonable discretion of the managing general partner of Optionor, there has
been, as compared to the date hereof, a material diminution or degradation in
the value of the assets of the Investment Loan Borrower or the ability of the
Investment Loan Borrower to pay its outstanding obligations as they become due
from the date hereof.


                                 Defined Terms
                                 -------------

     As used herein, the following terms shall have the following meanings:

     "DETERMINATION DATE" shall mean the date upon which the Fair Market Value
of the Remainder Notes is determined and shall occur at 10:00 a.m. (New York
City time) on the date that the Option Election Notice or Put Election Notice,
as the case may be, is received by the addressee thereof.

     "DISCOUNT RATE" shall mean the Reinvestment Rate plus the Margin.

                                      B-1

 
     "MARGIN" shall mean, with respect to any Remainder Note, the Margin (as
defined in the Investment Loan Note Purchase Agreement) of such Remainder Note.

     "RATING AGENCIES" shall mean Fitch IBCA, Inc. and Standard and Poor's
Corporation.

     "REINVESTMENT RATE" shall mean, with respect to any Remainder Note, the
offered-side yield to maturity as of the Determination Date of the U.S. Treasury
security that was used to determine the then Treasury (as defined in the
Investment Loan Note Purchase Agreement) of such Investment Note.

     "REMAINING CASH FLOW" shall mean, for any Remainder Note, the aggregate
amount of all accrued and unpaid interest, principal and other payments under
such Remainder Note on the Closing Date and all principal, interest and other
payments that will become due and owing under such Remainder Note from time to
time from and after the Closing Date through (x) the next Rate Reset Date of
such Remainder Note (the "Next Reset Date"), if the Fair Market Value is
determined prior to such Rate Reset Date, or (y) the maturity of such Remainder
Note (including, without limitation, any balloon or other principal payments due
and owing on said maturity date), if the Fair Market Value is determined after
all Rate Reset Dates provided in such Remainder Note, as each such payment would
become due and payable pursuant to the terms of the applicable Remainder Note
and the Investment Loan Documents ( but assuming, if Clause (x) above applies,
                                                     ----------  
that any interest that is scheduled to be accrued but unpaid as of the Next
Reset Date (i.e., because the interest payment date with respect thereto will
            ---   
not have occurred), and any outstanding principal and any other amounts under
the Investment Note on such Next Reset Date, will be repaid in full on the Next
Reset Date; and further assuming, for purposes of calculating all future
interest payments due under such Remainder Note, that the interest rate in
effect with respect to the Remainder Note on the Closing Date will remain
constant for purposes of determining the Fair Market Value of such Remainder
Note).

                                      B-2

 
                                   EXHIBIT C

                       FORM OF ALLONGE TO REMAINDER NOTES
                       ----------------------------------


Date of Note:  ____________________
Maker:  Prudential Realty Securities, Inc.
Face Amount:  $__________________


PAY TO THE ORDER OF __________________________________, WITHOUT RECOURSE,
REPRESENTATION OR WARRANTY, EXCEPT AS SPECIFICALLY PROVIDED IN THAT CERTAIN
OPTION AND PUT AGREEMENT DATED AS OF NOVEMBER ___, 1998, BY AND AMONG ONE
EMBARCADERO CENTER VENTURE, AS OPTIONOR, AND THE PRUDENTIAL INSURANCE COMPANY OF
AMERICA, AS OPTIONEE.

Dated:  ______________, 199__



                         ONE EMBARCADERO CENTER VENTURE,
                         a California general partnership

                         By:  BOSTON PROPERTIES LLC,
                              a Delaware limited liability company,
                              its Managing General Partner

                              By:   BOSTON PROPERTIES LIMITED
                                    PARTNERSHIP, a Delaware limited
                                    partnership, as Manager

                                    By:  BOSTON PROPERTIES, INC.
                                         a Delaware Corporation,
                                         as General Partner


                                         By:   _________________________________
                                         Name: _________________________________
                                         Title:_________________________________

                                      C-1

 
                                   EXHIBIT D

                       FORM OF ASSIGNMENT AND ASSUMPTION
                       ---------------------------------
                                    OF LOAN
                                    -------


                           ASSIGNMENT AND ASSUMPTION
                                    OF LOAN


          FOR VALUE RECEIVED, the receipt and sufficiency of which are hereby
acknowledged, ONE EMBARCADERO CENTER VENTURE, a California general partnership
("ASSIGNOR"), hereby sells, grants, assigns and transfers to __________________
("ASSIGNEE"), without recourse, representation or warranty (except as expressly
set forth in that certain Option and Put Agreement dated as of ________, 1998,
by and between Assignor and The Prudential Insurance Company of America), and
Assignee hereby purchases and assumes from Assignor, (i) all right, title and
interest of Assignor under and in connection with those certain promissory notes
evidencing the principal amount of _________________________ Dollars
($_______________), executed and delivered by Prudential Realty Securities,
Inc., as "maker" (the "REMAINDER NOTES"), and (ii) the rights of Assignor in, to
and under all documents and instruments listed on Exhibit A attached hereto and
                                                  ---------                    
incorporated herein by this reference, which documents and instruments further
evidence, secure and/or govern the Remainder Notes; but only to the extent that
such documents and instruments relate to the Remainder Notes (it being
acknowledged and agreed that the Remainder Notes are a portion of a
$_____________ loan and that the principal balance of such loan that is not
evidenced by the Remainder Notes (and all documents and instruments relating to
such principal balance) has been transferred to PIC Realty Corporation).  The
Remainder Notes and all other documents listed on Exhibit A attached hereto to
                                                  ---------                   
the extent they relate to the Remainder Notes shall sometimes hereinafter be
collectively referred to as the "INVESTMENT LOAN DOCUMENTS".

          Assignee hereby accepts the foregoing assignment and agrees to assume,
pay, perform and discharge, as and when due, all of the agreements, obligations
and liabilities of Assignor under or arising from or out of the Remainder Notes
and the Investment Loan Documents (but only to the extent relating to the
Remainder Notes) to be paid, performed or discharged on and after the date
hereof and agrees to be bound by all of the terms and conditions of the
Investment Loan Documents to be performed on and after the date hereof (but only
to the extent relating to the Remainder Notes) (all such items, collectively,
the "POST-CLOSING OBLIGATIONS").

                                      D-1

 
          This Assignment shall be binding upon and inure to the benefit of
Assignor and Assignee, and their respective successors and assigns.

                         "ASSIGNOR"

                         ONE EMBARCADERO CENTER VENTURE, a 
                         California General Partnership

                         By:  BOSTON PROPERTIES LLC,
                              a Delaware limited liability company,
                              as Managing General Partner

                              By:   BOSTON PROPERTIES LIMITED
                                    PARTNERSHIP, a Delaware limited
                                    partnership, as Manager

                                    By:  BOSTON PROPERTIES, INC.,
                                         a Delaware corporation,
                                         as General Partner



                                         By:_______________________
                                         Name:_____________________
                                         Title:____________________


                              "ASSIGNEE"

                              [INSERT ASSIGNEE SIGNATURE BLOCK]

                                      D-2

 
                              JOINDER AND RELEASE
                              -------------------


          The undersigned, as maker of the Remainder Notes, hereby agrees to
release the Assignor from all Post-Closing Obligations and shall look only to
Assignee for satisfaction of the same.

                              PRUDENTIAL REALTY SECURITIES, INC.,
                              a Delaware corporation



                              By: _________________________________
                              Name: _______________________________
                              Title: ______________________________

                                      D-3

 
                                                                   EXHIBIT 99.20


                           OPTION AND PUT AGREEMENT


          THIS OPTION AND PUT AGREEMENT (this "AGREEMENT") is entered into as of
November 12, 1998, by and between EMBARCADERO CENTER ASSOCIATES, a California
general partnership ("OPTIONOR"), and THE PRUDENTIAL INSURANCE COMPANY OF
AMERICA, a New Jersey corporation ("PRUDENTIAL" and together with any permitted
assignee or designee hereunder hereinafter sometimes referred to as "OPTIONEE").

                                   RECITALS
                                   --------

          A.   Optionor is the "holder" of and "payee" under those certain
Senior Notes of even date herewith, executed and delivered by Prudential Realty
Securities, Inc., a Delaware corporation ("INVESTMENT LOAN BORROWER"), in the
aggregate principal amount of One Hundred Eleven Million Nine Hundred Twenty-
Seven Thousand and No/100 Dollars ($111,927,000) (the "INVESTMENT LOAN"), copies
of which notes are attached hereto as Exhibit A (the "INVESTMENT NOTES").  The
                                      ---------                               
Investment Notes were made pursuant to the Note Purchase Agreement of even date
herewith, by and between Optionor and Investment Loan Borrower (the "INVESTMENT
LOAN NOTE PURCHASE AGREEMENT").

          B.   Pursuant to that certain Redemption Agreement of even date
herewith, by and among Optionor, PIC Realty Corporation ("PIC"), Boston
Properties LLC and BP EC2 Holdings LLC (the "REDEMPTION AGREEMENT"), the
Investment Notes (or certain of the Investment Notes or portions thereof as
provided in accordance with the terms and provisions of the Redemption
Agreement) may be distributed (together with cash, if necessary pursuant to the
Redemption Agreement) to PIC in full redemption of its partnership interest in
Optionor.  The date on which such Investment Notes (or portions thereof) are
distributed to PIC and PIC's partnership interest in the Optionor is fully
redeemed (such that PIC is no longer a partner or constituent of Optionor)
pursuant to the Redemption Agreement shall be referred to in this Agreement as
the "REDEMPTION DATE".

          C.   Pursuant to certain terms, provisions and conditions of the
Redemption Agreement, less than the entire principal face amount of all
Investment Notes may be distributed to PIC on the Redemption Date.  In such
event, the Optionor may retain, as payee, a portion of the aggregate principal
amount of all Investment Notes (the "REMAINDER") after the Redemption Date,
which Remainder will be evidenced by one or more of the Investment Notes that
are retained by Optionor pursuant to the Redemption Agreement and, if applicable
pursuant to the terms and provisions of the Redemption Agreement and the
Investment Loan Note Purchase Agreement, a new promissory note issued by the
Investment Loan Borrower in accordance with Section 2 of the Redemption
Agreement, all of which notes shall have an aggregate principal amount equal to
the Remainder (collectively, the "REMAINDER NOTES").  All documents and
instruments evidencing, securing or relating to the Investment Notes or
Remainder Notes (including, without limitation, 

                                       1

 
the Investment Loan Note Purchase Agreement) shall be herein referred to as the
"INVESTMENT LOAN DOCUMENTS".

          D.   Optionee desires to acquire an option to purchase and acquire
Optionor's entire interest in, to and under any such Remainder Notes and
Optionor is willing to grant such option, and Optionor desires to acquire a put
right to cause Optionee to purchase and acquire Optionor's entire interest in,
to and under any such Remainder Notes and Optionee is willing to grant such put
right to Optionor, all upon the terms and conditions hereinafter set forth.

                                   AGREEMENT
                                   ---------

          NOW, THEREFORE, in consideration of the benefits accruing to the
parties hereto, and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged by Optionor and Optionee, Optionor
and Optionee hereby agree as follows:

          1.   OPTION.
               ------ 

          (A)  Grant of Option.  Optionor hereby unconditionally and irrevocably
               ---------------                                                  
grants, conveys, transfers and assigns to Optionee (or its designee) the
exclusive option and right to, subject to the terms and provisions of this
Agreement, acquire Optionor's entire right, title and interest in, to and under
all Remainder Notes in accordance with and subject to the terms and conditions
of this Agreement; provided that, Optionee shall assume all of Optionor's
                   -------- ----                                         
duties, obligations and liabilities arising under the Remainder Notes and the
Investment Loan Documents (but only to the extent the same relate to the
Remainder Notes) accruing from and after the Closing Date (the "OPTION").

          (B)  Term and Exercise of Option.  Optionee may exercise the Option at
               ---------------------------                                      
any time from and after the Redemption Date and on or before 6:00 p.m pacific
coast time on the earlier of (x) the date which is one hundred and sixty-five
(165) days after the Redemption Date and (y) August 31, 2002 (the "OPTION
ELECTION PERIOD") by giving Optionor no less than ten (10) business days'
written notice of exercise (the "OPTION ELECTION NOTICE"); provided that,
                                                           -------- ---- 
notwithstanding the foregoing, Optionee's right to give an Option Election
Notice and to purchase the Remainder Notes pursuant to its option shall be
suspended during any period of time while there exists an "Investment Loan
Borrower Credit Event" (as defined in Exhibit B attached hereto).  The Option
                                      ---------                              
Election Notice shall include (i) the proposed closing date, which shall not be
less than ten (10) business days after the delivery thereof nor more than twenty
(20) business days after the delivery thereof, and (ii) the Optionee's
calculation of the Fair Market Value (as defined in Section 3 below) of the
                                                    ---------              
Remainder Notes based on the proposed closing date.  In the event that the
Option is not exercised on or before the expiration of the Option Election
Period, or the transaction has not closed within twenty (20) business days after
the expiration of the Option Election Period for any reason other than the
default of the Optionor, then the Option shall become null and void and of no
further force or effect, and the parties hereto shall be released from all
further liabilities and obligations hereunder with respect to the Option (except
as otherwise expressly provided herein).

                                       2

 
          (C)  Option Fee.  No later than three (3) calendar days after the
              ----------                                                  
execution of this Agreement by Optionor and Optionee, Optionee shall pay to
Optionor the sum of One Hundred Dollars ($100) (the "OPTION FEE").  The Option
Fee is non-refundable (except as otherwise expressly provided in this
Agreement); provided that, the Option Fee shall be credited against the Purchase
            -------- ----                                                       
Price (as defined in Section 3 below) payable at Closing (as defined in Section
                     ---------                                          -------
4(a) below).
- ----        

          2.   PUT.
               --- 

          (A)  Grant of Put.  Optionee hereby unconditionally and irrevocably
               ------------                                                  
grants, conveys, transfers and assigns to Optionor the exclusive right to,
subject to the terms and provisions of this Agreement, put and sell to Optionee
Optionor's entire right, title and interest in, to and under all Remainder Notes
in accordance with and subject to the terms and conditions of this Agreement
(the "PUT").  Optionee shall be obligated to acquire such Remainder Notes upon
the exercise of Optionor's Put and to assume all of Optionor's duties,
obligations and liabilities arising under the Remainder Notes and the Investment
Loan Documents (but only to the extent the same relate to the Remainder Notes)
accruing from and after the Closing Date.  In the event that Optionor exercises
its Put, the Option Fee shall be credited against the Purchase Price payable at
Closing.

          (B)  Term and Exercise of Put.  Optionor may exercise the Put at any
               ------------------------                                       
time during the Put Period (defined immediately below) by giving Optionee no
less than ten (10) business days' written notice of exercise (the "PUT ELECTION
NOTICE") at any time prior to the expiration of the Put Period; provided that,
                                                                -------- ---- 
notwithstanding the foregoing, Optionor's right to give a Put Election Notice
and to put the Remainder Notes to Optionee pursuant to this Agreement shall be
suspended during any period of time while the Remainder Notes have been
accelerated and such acceleration has not been rescinded by the holders of the
Remainder Notes.  The Put Election Notice shall include (i) the proposed closing
date, which shall not be less than ten (10) business days after the delivery
thereof nor more than twenty (20) business days after the delivery thereof, and
(ii) the Optionor's calculation of the Fair Market Value of the Remainder Notes
based on the proposed closing date.  In the event that the Put is not exercised
prior to the expiration of the Put Period, and the transaction has not closed on
or before the date which is twenty (20) business days after the expiration of
the Put Period for any reason other than the default of the Optionee, then the
Put shall become null and void and of no further force or effect, and the
parties hereto shall be released from all further liabilities and obligations
hereunder with respect to the Put (except as otherwise expressly provided
herein).  As used herein, the "PUT PERIOD" shall mean the period of time
commencing on the thirty-first (31st) day after the expiration of the Option
Election Period and expiring at 6:00 p.m. pacific coast time on the thirtieth
(30th) day thereafter.

          3.   PURCHASE PRICE.  The total purchase price ("PURCHASE PRICE")
               --------------                                              
which Optionee shall pay to Optionor for the Remainder Notes upon the exercise
of the Option or Put shall be the Fair Market Value of such Remainder Notes on
the date of Closing.  At Closing, Optionee shall pay to Optionor the entire
balance of the Purchase Price, over and above the Option 

                                       3

 
Fee previously paid to Optionor and credited to the Purchase Price in accordance
with the terms and provisions of Sections 1(c) and 2(a) above (provided that the
                                 -------------     ---- 
parties acknowledge and agree that no interest or other income earned by
Optionor on the Option Fee shall be credited against the Purchase Price), by
wire transfer of immediately available funds. The "FAIR MARKET VALUE" of the
Remainder Notes shall be calculated and determined as of the Closing Date as
provided in Exhibit B attached hereto.
            ---------

          4.   CLOSING.
               ------- 

          (A)  Closing.  Upon exercise of the Option or Put as provided in (and
               -------                                                         
in accordance with) any of Sections 1 or 2 above, the purchase and sale of the
                           ----------    -                                    
Remainder Notes shall close on the closing date specified in the Option Election
Notice or Put Election Notice, as applicable, in accordance with the terms of
Sections 1(b) and 2(b), respectively (the "CLOSING DATE").  As used herein, the
- -------------     ----                                                         
term "CLOSING" means the date and time that the Purchase Price due under Section
                                                                         -------
3 above is paid to Optionor for the Remainder Notes, and the Remainder Notes are
- -                                                                               
endorsed to the order of Optionee and all other documents and instruments of
transfer and assumption are executed and delivered by the parties in accordance
with the terms and provisions of subsection (b) below.
                                 --------------       

          (B)  Closing Procedure.  The sale of the Remainder Notes shall be
               -----------------                                           
consummated on the Closing Date as follows:

               (I)    On or before the Closing Date, Optionor shall execute and
     deliver to Optionee (A) an Allonge to each Remainder Note in the form of
     Exhibit C attached hereto (the "ALLONGE"); (B) counterpart originals of an
     ---------                                                                 
     Assignment and Assumption of Loan in the form of Exhibit D attached hereto
                                                      ---------                
     (the "ASSIGNMENT"), executed by Optionor; and (C) the original Remainder
     Notes and originals or copies of all other Investment Loan Documents in
     Optionor's possession or within its control.

               (II)   On or before the Closing Date, Optionee shall deliver to
     Optionor, (A) in immediately available funds the Purchase Price (less the
     Option Fee) and such additional amounts as may be required to satisfy
     Optionee's share of any Closing costs; and (B) counterpart originals of the
     Assignment, executed by Optionee.

               (III)  All reasonable Closing and escrow fees and costs incurred
     in connection with the transactions described in this Agreement shall be
     paid fifty percent (50%) by Optionor and fifty percent (50%) by Optionee;
     provided that, each party hereto shall bear the expense of its own counsel.
     -------- ----                                                              

          5.   OPTIONOR'S REPRESENTATIONS AND WARRANTIES.  Optionor hereby
               -----------------------------------------                  
represents and warrants to Optionee as of the date hereof and as of the Closing
Date as follows:

                                       4

 
          (A)  Subject to the rights of PIC under the Redemption Agreement,
Optionor is the sole owner of the Investment Notes on the date hereof, and on
the Closing Date, Optionor shall be the sole owner of the Remainder Notes.
Further, the Investment Notes are free and clear of all liens and third party
interests on the date hereof (other than the interests and rights in favor of
PIC under the Redemption Agreement and any pledge of the Investment Notes
securing the Equity Redemption Loan (as defined in the Redemption Agreement)),
and on the Closing Date, the Remainder Notes shall be free and clear of all
liens and third party interests of any kind or nature, except as created by this
Agreement.  Optionor has not amended, modified, terminated or otherwise by
written agreement altered the Investment Notes or other Investment Loan
Documents except as specifically disclosed to Optionee in writing prior to the
date hereof, and on the Closing Date, except as otherwise amended, modified or
altered in connection with the transactions contemplated in the Redemption
Agreement, Optionor shall not have amended, modified, terminated or otherwise
altered the Investment Notes, Remainder Notes or other Investment Loan Documents
without Optionee's written consent obtained in accordance with Section 7 hereof.
                                                               ---------        

          (B)  As of the date hereof, Optionor has not assigned or transferred
the Investment Notes or any of the other Investment Loan Documents (except for
any pledge of the Investment Notes securing the Equity Redemption Loan), nor are
there any agreements to assign or convey any portion of such Investment Loan
Documents to any person other than Optionee and PIC in accordance with this
Agreement and the Redemption Agreement, respectively.  On the Closing Date,
Optionor shall not have assigned or transferred the Remainder Notes or any of
the other Investment Loan Documents (except for such portion of the Investment
Notes transferred to PIC in accordance with the Redemption Agreement), nor shall
there be any agreements to assign or convey the Remainder Notes or any portion
of such Investment Loan Documents to any person other than Optionee (except with
respect to PIC's rights under the Redemption Agreement).

          (C)  To Optionor's knowledge, Optionor has all requisite power and
authority to execute and deliver, and to perform all of its obligations under,
this Agreement and all instruments and other documents to be executed and
delivered to Optionee in connection with the transactions described herein.

          (D)  To Optionor's knowledge, Optionor is a duly formed general
partnership under the laws of the State of California, and this Agreement, and
all the instruments and documents to be executed and delivered by Optionor in
connection herewith, are legal, valid and binding obligations of Optionor
enforceable against it in accordance with their respective terms, except to the
extent that enforcement may be limited by applicable bankruptcy, insolvency,
moratorium and other principles relating to or limiting the rights of
contracting parties generally.

          (E)  To Optionor's knowledge, the execution of this Agreement and the
performance of Optionor's obligations hereunder will not conflict with or result
in a breach of any statute, rule, regulation, judgment, decree or order of any
court, board, committee or governmental agency to which Optionor is subject, nor
violate any agreement or contract to which Optionor is a party or by which
Optionor is bound.  To Optionor's knowledge, no consent, approval, authorization
or 

                                       5

 
order of any court or governmental agency or body is required for the execution,
delivery and performance by Optionor of, or compliance by Optionor with, this
Agreement or the consummation of the transactions contemplated by it, except for
such consents, approvals, authorizations or orders, if any, that have been
obtained.

Each of the foregoing representations and warranties shall survive the Closing
for a period of twelve (12) months immediately thereafter.

          6.   OPTIONEE'S REPRESENTATIONS, WARRANTIES AND ACKNOWLEDGMENTS.
               ---------------------------------------------------------- 
Optionee hereby represents, warrants and acknowledges to Optionor as of the date
hereof and as of the Closing Date as follows:

          (A)  Optionee is a corporation duly organized, validly existing and in
good standing under the laws of the State of New Jersey.  Optionee has all
requisite power and authority to execute and deliver, and to perform all of its
obligations under, this Agreement and all instruments and other documents
executed and delivered by Optionee in connection with the transactions
contemplated herein.  This Agreement, and all the instruments and documents to
be executed and delivered by Optionee in connection herewith, are legal, valid
and binding obligations of Optionee enforceable against it in accordance with
their respective terms, except to the extent that enforcement may be limited by
applicable bankruptcy, insolvency, moratorium and other principles relating to
or limiting the rights of contracting parties generally.

          (B)  The execution, delivery and performance of this Agreement has
been duly authorized by all necessary action on the part of Optionee and does
not require any consent or approval of any party that has not been obtained.

          (C)  The execution of this Agreement and the performance of Optionee's
obligations hereunder will not conflict with or result in a breach of any
statute, rule, regulation, judgment, decree or order of any court, board,
committee or governmental agency to which Optionee is subject, nor violate any
agreement or contract to which Optionee is a party or by which Optionee is
bound.  No consent, approval, authorization or order of any court or
governmental agency or body is required for the execution, delivery and
performance by Optionee of, or compliance by Optionee with, this Agreement or
the consummation of the transactions contemplated by it, except for such
consents, approvals, authorizations or orders, if any, that have been obtained.

          (D)  Optionee has made, and will make, prior to the Closing, such
examination, review and investigation of the facts and circumstances as
necessary to evaluate the Remainder Notes.  Optionee further acknowledges that
in acquiring the Remainder Notes, Optionee is assuming the risk of full or
partial loss which is inherent with the credit, collateral and collectibility
risks associated with the quality and character of the loan evidenced by the
Remainder Notes.

                                       6

 
          (E)  Optionee is an "accredited investor" as defined in Regulation D
under the Securities Act of 1933, as amended.  The Remainder Notes will be
acquired by Optionee for its own account for investment only and not with a view
to, or with any intention of, a distribution or resale thereof, in whole or in
part.

          (F)  Optionee has not relied upon any representations, warranties or
statements of any kind made by, or on behalf of, Optionor, except as
specifically set forth in this Agreement. Optionee acknowledges that, except for
the express representations and warranties by Optionor set forth in, or to be
made in instruments delivered pursuant to, this Agreement, Optionor negates and
disclaims all representations, warranties and statements of every kind or type
(express or implied) and, except for the Optionor's representations and
warranties set forth herein, the Remainder Notes are being acquired "as is" with
no recourse to Optionor for any default thereunder or diminution in value with
respect thereto.

Each of the foregoing representations and warranties shall survive the Closing
for a period of twelve (12) months immediately thereafter.

          7.   COVENANTS.  Optionor hereby covenants and agrees that, from and
               ---------                                                      
after the date hereof, except as otherwise contemplated in and permitted by the
Redemption Agreement, Optionor will not, without Optionee's prior written
consent, (a) amend, modify, cancel or terminate, any of the Investment Notes,
Remainder Notes or Investment Loan Documents in any manner which will adversely
affect or impact the interest of the "payee" under the Remainder Notes and
Investment Loan Documents if and when such Remainder Notes are transferred to
Optionee, (b) waive, relinquish or allow to lapse any right of Optionor as
"lender/payee" under the Investment Notes, Remainder Notes or Investment Loan
Documents which will in any manner adversely affect or impact the interest of
the "payee" under the Remainder Notes and other Investment Loan Documents if and
when such Remainder Notes are transferred to Optionee, or (c) agree or consent
to any agreements or understandings that will impact the Remainder Notes if and
when such Remainder Notes are transferred to Optionee.  In furtherance of the
foregoing, except for the transfer of Investment Notes to PIC pursuant to the
Redemption Agreement and any pledge of the Investment Notes to secure the Equity
Redemption Loan, Optionor shall not sell, assign or otherwise transfer any of
the Investment Notes or Remainder Notes prior to the expiration of the Option
Election Period; provided that, (i) Optionor shall be permitted to transfer any
                 -------- ----                                                 
Remainder Notes after the "Redemption Distribution" under the Redemption
Agreement subject to this Agreement, and (ii) all restrictions on the
transferability of the Investment Notes and Remainder Notes shall cease upon the
expiration of the Option Election Period and Optionor shall thereafter be
permitted to freely transfer the Investment Notes and/or Remainder Notes without
restriction.  Upon written request by either party at or prior to the Closing,
the other party shall give to the requesting party written notice of any newly
discovered information that causes any of the representations or warranties of
such responding party made in this Agreement to be materially untrue or
incorrect, or of the occurrence of any event or circumstance that would
materially modify or affect the substance of such representations and
warranties.

                                       7

 
          8.   CONFIDENTIALITY; PRESS RELEASES.  Each party hereto hereby agrees
               -------------------------------                                  
that, except as required by law or the regulations of an exchange on which
securities of such party are listed or unless compelled by an order of a court,
and except for such disclosures to each party's lenders, consultants, attorneys,
prospective investors, agents, assignees, partners, officers, directors,
employees and advisors as may be necessary or advisable in connection with the
consummation of the transactions contemplated herein (provided each such person
is instructed to comply with the terms of this confidentiality provision), it
shall keep the contents of this Agreement and the transactions contemplated
hereby confidential and further agrees to refrain from generating or
participating in any publicity statement, press release, or other public notice
regarding this Agreement or the transactions contemplated hereby, without the
prior written consent of the other party, which consent shall not be
unreasonably withheld.  The terms and provisions of this Section 8 shall survive
                                                         ---------              
the Closing or any termination of this Agreement and shall not be merged into
any instrument or conveyance delivered at the Closing.

          9.   COMMISSIONS.  Optionor and Optionee each agrees to indemnify,
               -----------                                                  
defend, protect and hold the other harmless from and against any and all
commissions, finder's and/or similar fees or compensation claimed by any broker
or finder in connection with Optionee's purchase of the Remainder Notes based on
claimed contacts with, or other acts or omissions of, such indemnifying party.
The terms and provisions of this Section 9 shall survive the Closing or
                                 ---------                             
termination of this Agreement.

          10.  REMEDIES.  In the event of any material breach by either party to
               --------                                                         
this Agreement, the remedy at law in favor of the other party may be inadequate
and such other party, in addition to all other rights and remedies which may be
available to it at law or in equity, shall have the right of specific
performance in the event of any material breach, or injunction in the event of
an anticipatory material breach, of this Agreement by the other party.
Furthermore, upon the material breach of this Agreement by any party, the other
party shall have the right to terminate this Agreement and to recover its
damages, and, upon a material breach by Optionor, Optionee shall also have the
right to receive a refund of the Option Fee.  Such refund of the Option Fee
shall be in addition to, and not in lieu of, any other remedies which Optionee
may have against Optionor at law or in equity arising from Optionor's breach.

          11.  INDEMNIFICATION.  Optionor hereby agrees to indemnify, protect,
               ---------------                                                
defend, save and hold harmless Optionee, and Optionee's trustees, officers,
directors, shareholders, beneficiaries, members, partners, agents, employees,
investment advisors and independent contractors from and against any and all
duties, obligations, liabilities, suits, claims, demands, causes of action,
costs and expenses (including, without limitation, reasonable attorneys' fees
and costs), arising out of a breach by the Optionor of any of its
representations and warranties made in Section 5.  Optionee hereby agrees to
                                       ---------                            
indemnify, protect, defend, save and hold harmless Optionor, and Optionor's
trustees, officers, directors, shareholders, beneficiaries, members, partners,
agents, employees, investment advisors and independent contractors from and
against any and all duties, obligations, liabilities, suits, claims, demands,
causes of action, costs and expenses (including, without limitation, reasonable
attorneys' fees and costs), arising out of a 

                                       8

 
breach by the Optionee of any of its representations and warranties made in
Section 6. The terms and provisions of this Section 11 shall survive the 
- ---------                                   ----------   
Closing or the termination of this Agreement for a period of twelve (12) months
immediately thereafter.

          12.  ESCROW INSTRUCTIONS.  Upon the request of either Optionor or
               -------------------                                         
Optionee, the parties hereto shall execute and deliver any and all escrow
documents reasonably approved by such party and perform any and all acts
reasonably necessary or appropriate to open and enter into an escrow in order to
consummate the transactions contemplated herein.  Such agreements may include,
without limitation, customary escrow instructions (including, without
limitation, standard general terms and conditions to the extent the appointed
escrow agent demands such provisions in order to serve as escrow agent), as may
be reasonably necessary or desirable in order to enable the escrow agent to
comply with the terms of this Agreement.  The escrow agent shall be selected by
the party making the request for an escrow (and shall not be affiliated with
such party), but shall be subject to the written approval of the other party,
which approval shall not be unreasonably withheld or delayed.  The parties shall
share equally the costs and expenses of the escrow and escrow agent.

          13.  MISCELLANEOUS.
               ------------- 

          (A)  Authority.  Each individual and entity executing this Agreement
               ---------                                                      
represents and warrants that he, she or it has the capacity set forth on the
signature pages hereof with full power and authority to bind the party on whose
behalf he, she or it is executing this Agreement to the terms hereof.

          (B)  Further Assurances.  Optionor and Optionee shall each execute and
               ------------------                                               
deliver to the other such further documents and instruments as may be reasonably
requested by either of them in order to effectuate the intent of this Agreement
and to obtain the full benefit of this Agreement.  Any request by either party
under this Section 13(b) shall be accompanied by the document proposed for
           -------------                                                  
signature by the party requesting it, in form and substance satisfactory to the
party of whom the request is made and its attorneys.  The party making the
request shall bear and discharge any fees or expenses incident to the
preparation, filing or recording of the document requested pursuant to this
Section 13(b).
- ------------- 

          (C)  Time of the Essence. Time is of the essence in the performance of
               -------------------  
and compliance with each of the provisions of this Agreement.

          (D)  Governing Law.  This Agreement shall be governed by and
               -------------                                          
interpreted in accordance with the laws of the State of California, without
reference to California's conflicts or choice of law principles.

          (E)  Entire Agreement.  THIS AGREEMENT, THE MASTER TRANSACTION
               ----------------                                         
AGREEMENT DATED AS OF SEPTEMBER 28, 1998, BY AND AMONG PRUDENTIAL, PIC, CERTAIN
PERSONS LISTED ON EXHIBIT A THERETO, FEDMARK CORPORATION, 

                                       9

 
EMBARCADERO CENTER INVESTORS PARTNERSHIP, PACIFIC PROPERTY SERVICES, L.P.,
BOSTON PROPERTIES LIMITED PARTNERSHIP AND BOSTON PROPERTIES, INC. AND ALL
TRANSACTION DOCUMENTS DESCRIBED THEREIN (COLLECTIVELY, THE "TRANSACTION
DOCUMENTS") REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE
CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENT
OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES. The
parties make no representations or warranties to each other, except as
specifically contained in this Agreement or in the accompanying exhibits or the
certificates or other closing documents delivered according to this Agreement or
in the other Transaction Documents. All prior agreements and understanding
between the parties hereto with respect to the transactions contemplated hereby,
whether verbal or in writing, are superseded by, and are deemed to have been
merged into, this Agreement and all other Transaction Documents. Any waiver,
modification, consent or acquiescence with respect to any provision of this
Agreement shall be set forth in writing and duly executed by or in behalf of the
party to be bound thereby. No waiver by any party of any breach hereunder shall
be deemed a waiver of any other or subsequent breach.

          (F)  Modifications.  This Agreement may not be changed, waived,
               -------------                                             
discharged or terminated orally, but only by an instrument in writing signed by
the party against which enforcement of such change, waiver, discharge or
termination is sought.

          (G)  Severability.  If any provision of this Agreement shall be
               ------------                                              
determined to be invalid, illegal or unenforceable, the balance of this
Agreement shall remain in full force and effect and if any provision is
inapplicable to any person or circumstance, it shall nevertheless remain
applicable to all other persons and circumstances.

          (H)  Assignee; Designee.  Optionee may assign this Agreement or
               ------------------                                        
designate a designee to acquire Optionor's entire right, title and interest in
and to the Remainder Notes at any time prior to the Closing; provided that, in
                                                             -------- ----    
no event shall Prudential be released from any of the obligations or liabilities
of the "Optionee" hereunder without the prior written consent of Optionor.  This
Agreement may not otherwise be assigned, nor may any interest herein be
assigned, by Optionee without Optionor's prior written consent.

          (I)  Notices.  All notices, elections, consents, approvals, demands,
               -------                                                        
objections, requests or other communications which any party hereto may be
required or desire to give to the other party hereto must be in writing and sent
by (i) first class U.S. certified or registered mail, return receipt requested,
with postage prepaid, (ii) telecopy or facsimile (with a copy sent by first
class U.S. certified or registered mail, return receipt requested, with postage
prepaid), or (iii) express mail or a nationally recognized courier (for next
business day delivery).  A notice or other communication sent in compliance with
the provisions of this Section 13(i) shall be deemed given and received on (a)
                       -------------                                          
the third (3rd) day following the date it is deposited in the U.S. mail, (b) the
date of confirmed dispatch if sent by facsimile or telecopy (provided that a
copy thereof is sent by 

                                       10

 
mail in the manner provided in clause (i) above), or (c) the date it is
                               ----------               
delivered to the other party if sent by express mail or courier. The addresses
for the parties are as follows:

          All notices and other communications to Optionor shall be given to it
at:

          c/o Boston Properties, Inc.
          8 Arlington Street
          Boston, Massachusetts 02116-3495
          Attention:  General Counsel
          Facsimile No.: (617) 421-1555

          with a copy to:

          Goulston & Storrs, P.C.
          400 Atlantic Avenue
          Boston, Massachusetts 02110-3333
          Attention:  Eli Rubenstein, Esq.
          Facsimile No.: (617) 574-4112

          All notices and other communications to Optionee shall be given to it
at:

          The Prudential Insurance Company of America
          Prudential Realty Group
          8 Campus Drive, 4th Floor
          Arbor Circle South
          Parsippany, New Jersey 07054
          Attention:  John R. Triece
          Facsimile No.: (201) 734-1472

          with a copy to:

          The Prudential Insurance Company of America
          Prudential Capital Group
          Four Embarcadero Center
          Suite 2700
          San Francisco, California 94111
          Attention:  Harry N. Mixon, Esq.
          Facsimile No.: (415) 956-2197

          and a copy to:

          O'Melveny & Myers LLP
          Embarcadero Center West

                                       11

 
          275 Battery Street
          Suite 2600
          San Francisco, California 94111
          Attention:  Stephen A. Cowan, Esq.
          Facsimile No.:  (415) 984-8701

Any party may designate another addressee or change its address for notices and
other communications hereunder by a notice given to the other parties in the
manner provided in this Section 13(i).
                        ------------- 

          (J)  Attorneys' Fees. If any action is brought by either party against
               ---------------  
the other party relating to or arising out of this Agreement, the transactions
described herein or the enforcement hereof, the prevailing party shall be
entitled to recover from the other party reasonable attorneys' fees and costs
incurred in connection with the prosecution or defense of such action.  For
purposes of this Agreement, the term "ATTORNEYS' FEES" or "ATTORNEYS' FEES AND
COSTS" shall mean the fees and expenses of counsel to the parties hereto, which
may include printing, photostating, duplicating and other expenses, air freight
charges, and fees billed for law clerks, paralegals and other persons not
admitted to the bar but performing services under the supervision of an
attorney, and the costs and fees incurred in connection with the enforcement or
collection of any judgment obtained in any such proceeding.

          (K)  Counterparts.  This Agreement may be executed in one or more
               ------------                                                
counterparts, each of which shall constitute an original, but all of which, when
taken together, shall constitute only one instrument.  The signature page of any
counterpart may be detached therefrom without impairing the legal effect of the
signature(s) thereon provided such signature page is attached to any other
counterpart identical thereto except having additional signature pages executed
by other parties to this Agreement attached thereto.

          (L)  Successors and Assigns.  This Agreement shall be binding upon and
               ----------------------                                           
inure to the benefit of each of the parties hereto and to their respective
permitted transferees, successors and assigns.

          (M)  Exhibits.  All Exhibits attached hereto are hereby incorporated
               --------                                                       
herein.

          (N)  No Third Party Beneficiaries. Persons who are not parties to this
               ----------------------------  
Agreement shall have no rights or privileges (whether as a third party
beneficiary or otherwise) under or by virtue of this Agreement.

          (O)  Business Days.  In the event that any of the dates specified in
               -------------                                                  
this Agreement shall fall on a Saturday, Sunday, or a holiday recognized by the
State of California or the Commonwealth of Massachusetts, then the date of such
action shall be deemed to be extended to the next business day.

                                       12

 
          (P) Consent to Jurisdiction and Service of Process.  ALL JUDICIAL
              ----------------------------------------------               
PROCEEDINGS BROUGHT AGAINST ANY PERSON ARISING OUT OF OR RELATING TO THIS
AGREEMENT MAY BE BROUGHT IN ANY STATE OR FEDERAL COURT OF COMPETENT JURISDICTION
IN THE STATE OF CALIFORNIA, AND BY EXECUTION AND DELIVERY OF THIS AGREEMENT EACH
PARTY HERETO ACCEPTS FOR ITSELF, GENERALLY AND UNCONDITIONALLY, THE NONEXCLUSIVE
JURISDICTION OF THE AFORESAID COURTS AND WAIVES ANY DEFENSE OF FORUM NON
CONVENIENS AND IRREVOCABLY AGREES TO BE BOUND BY ANY JUDGMENT RENDERED THEREBY
IN CONNECTION WITH THIS AGREEMENT.  Each party hereby agrees that service of all
process in any such proceeding in any such court may be made by registered or
certified mail, return receipt requested, to any other party hereto, at its
address provided in this Agreement, such service being hereby acknowledged by
each party to be sufficient for personal jurisdiction in any action against such
party in any such court and to be otherwise effective and binding service in
every respect.  Nothing herein shall affect the right to serve process in any
other manner permitted by law.

          (Q) Waiver of Jury Trial.  EACH OF THE PARTIES TO THIS AGREEMENT
              --------------------                                        
HEREBY AGREES TO WAIVE ITS RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR
CAUSE OF ACTION BASED UPON OR ARISING OUT OF THIS AGREEMENT OR ANY DEALINGS
RELATING TO THE SUBJECT MATTER OF THIS AGREEMENT. The scope of this waiver is
intended to be all-encompassing of any and all disputes that may be filed in any
court and that relate to the subject matter of this transaction, including,
without limitation, contract claims, tort claims, breach of duty claims and all
common law and statutory rights.  Each party hereto acknowledges that this
waiver is a material inducement to enter into a business relationship, that each
has already relied on this waiver in entering into this Agreement, and that each
shall continue to rely on this waiver in their related future dealings.  Each
party hereto further warrants and represents that it has reviewed this waiver
with its legal counsel and that it knowingly and voluntarily waives its jury
trial rights following consultation with such legal counsel.  THIS WAIVER IS
IRREVOCABLE, MEANING THAT IT MAY NOT BE MODIFIED EITHER ORALLY OR IN WRITING,
AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS
OR MODIFICATIONS OF THIS AGREEMENT.  In the event of litigation, this Agreement
may be filed as a written consent to a trial by the court.


                           [SIGNATURES ON NEXT PAGE]

                                       13

 
          IN WITNESS WHEREOF, the undersigned have duly executed this Agreement
as of the date first above written.

                              "OPTIONOR"

                              EMBARCADERO CENTER ASSOCIATES,
                              a California General Partnership

                              By:   BOSTON PROPERTIES LLC,
                                    a Delaware limited liability company,
                                    as Managing General Partner

                                    By:  BOSTON PROPERTIES LIMITED
                                         PARTNERSHIP, a Delaware limited
                                         partnership, as Manager

                                         By:  BOSTON PROPERTIES,
                                              INC., a Delaware corporation,
                                              its General Partner



                                              By: /s/ Thomas J. O'Connor
                                                 -------------------------
                                              Name: Thomas J. O'Connor
                                              Title: Vice President


                              "OPTIONEE"

                              THE PRUDENTIAL INSURANCE COMPANY OF
                              AMERICA, a New Jersey corporation



                              By: /s/ Gary L. Frazier
                                 -------------------------------------
                              Name: __________________________________
                              Title: _________________________________

                                      S-1

 
                                    JOINDER

          The undersigned, as maker of the Remainder Notes, agrees that on the
Closing Date, at the request of Optionor, it will execute the Joinder and
Release on the Assignment and Assumption of Loan in the form attached hereto as
Exhibit D, which will be executed at such Closing.
- ---------                                         


                              PRUDENTIAL REALTY SECURITIES, INC.,
                              a Delaware corporation



                              By:   /s/ Paul D. Egan
                                  --------------------------------
                              Name:  Paul D. Egan
                              Title: Vice President

                                      S-2

 
                                   EXHIBIT A

                               INVESTMENT NOTES
                               ----------------

                                      A-1

 
                                   EXHIBIT B

                                CALCULATION OF
                               FAIR MARKET VALUE
                               -----------------


     The Fair Market Value of the Remainder Notes shall equal the aggregate
Remaining Cash Flow for all Remainder Notes discounted from each respective
scheduled payment due date to the Closing Date at a discount factor equal to the
Discount Rate for each such Remainder Note. Notwithstanding the foregoing, if on
the Determination Date an Investment Loan Borrower Credit Event exists, then
Optionor shall appoint an investment banking firm of national recognition (which
will be satisfactory to Optionee in its reasonable discretion) to determine the
change in the Fair Market Value of the Remainder Notes for purposes of this
Agreement.  In the event that an investment banking firm is appointed to
determine the change in the Fair Market Value of any Remainder Note as of the
Determination Date pursuant to the preceding sentence, such investment banking
firm shall be instructed to determine the change in the Fair Market Value of
such Remainder Note based on the following four factors: (i) changes in market
interest rates since the date of funding of the Remainder Note, (ii) the time
period remaining from the Determination Date until the earlier of the next Rate
Reset Date of such Remainder Note and the maturity of the Remainder Note, (iii)
the Remaining Cash Flow (as defined below) of the Remainder Note, and (iv)
changes in the credit quality of the Remainder Note since the date of funding
thereof.  The parties agree that an acceptable investment banking firm would be
Goldman Sachs or Merrill Lynch.  As used herein, the term "INVESTMENT LOAN
BORROWER CREDIT EVENT" shall mean any of the following events: (x) the credit
rating of the Remainder Notes has been downgraded from the credit rating of the
Remainder Notes on the date hereof by both of the Rating Agencies, or (y) in the
reasonable discretion of the managing general partner of Optionor, there has
been, as compared to the date hereof, a material diminution or degradation in
the value of the assets of the Investment Loan Borrower or the ability of the
Investment Loan Borrower to pay its outstanding obligations as they become due
from the date hereof.


                                 Defined Terms
                                 -------------

     As used herein, the following terms shall have the following meanings:

     "DETERMINATION DATE" shall mean the date upon which the Fair Market Value
of the Remainder Notes is determined and shall occur at 10:00 a.m. (New York
City time) on the date that the Option Election Notice or Put Election Notice,
as the case may be, is received by the addressee thereof.

     "DISCOUNT RATE" shall mean the Reinvestment Rate plus the Margin.

 
     "MARGIN" shall mean, with respect to any Remainder Note, the Margin (as
defined in the Investment Loan Note Purchase Agreement) of such Remainder Note.

     "RATING AGENCIES" shall mean Fitch IBCA, Inc. and Standard and Poor's
Corporation.

     "REINVESTMENT RATE" shall mean, with respect to any Remainder Note, the
offered-side yield to maturity as of the Determination Date of the U.S. Treasury
security that was used to determine the then Treasury (as defined in the
Investment Loan Note Purchase Agreement) of such Investment Note.

     "REMAINING CASH FLOW" shall mean, for any Remainder Note, the aggregate
amount of all accrued and unpaid interest, principal and other payments under
such Remainder Note on the Closing Date and all principal, interest and other
payments that will become due and owing under such Remainder Note from time to
time from and after the Closing Date through (x) the next Rate Reset Date of
such Remainder Note (the "Next Reset Date"), if the Fair Market Value is
determined prior to such Rate Reset Date, or (y) the maturity of such Remainder
Note (including, without limitation, any balloon or other principal payments due
and owing on said maturity date), if the Fair Market Value is determined after
all Rate Reset Dates provided in such Remainder Note, as each such payment would
become due and payable pursuant to the terms of the applicable Remainder Note
and the Investment Loan Documents ( but assuming, if clause (x) above applies,
                                                     ----------               
that any interest that is scheduled to be accrued but unpaid as of the Next
Reset Date (i.e., because the interest payment date with respect thereto will
            ----                                                             
not have occurred), and any outstanding principal and any other amounts under
the Investment Note on such Next Reset Date, will be repaid in full on the Next
Reset Date; and further assuming, for purposes of calculating all future
interest payments due under such Remainder Note, that the interest rate in
effect with respect to the Remainder Note on the Closing Date will remain
constant for purposes of determining the Fair Market Value of such Remainder
Note).

                                      B-2

 
                                   EXHIBIT C

                      FORM OF ALLONGE TO REMAINDER NOTES
                      ----------------------------------

Date of Note:  __________________________
Maker:  Prudential Realty Securities, Inc.
Face Amount:  $___________________________


PAY TO THE ORDER OF __________________________________, WITHOUT RECOURSE,
REPRESENTATION OR WARRANTY, EXCEPT AS SPECIFICALLY PROVIDED IN THAT CERTAIN
OPTION AND PUT AGREEMENT DATED AS OF NOVEMBER ___ 1998, BY AND AMONG EMBARCADERO
CENTER ASSOCIATES, AS OPTIONOR, AND THE PRUDENTIAL INSURANCE COMPANY OF AMERICA,
AS OPTIONEE.

Dated:  ______________, 199__



                         EMBARCADERO CENTER ASSOCIATES,
                         a California general partnership

                         By:  BOSTON PROPERTIES LLC,
                              a Delaware limited liability company,
                              as Managing General Partner

                              By:   BOSTON PROPERTIES LIMITED
                                    PARTNERSHIP, a Delaware limited
                                    partnership, as Manager

                                    By:  BOSTON PROPERTIES, INC.
                                         a Delaware Corporation,
                                         as General Partner


                                         By:  __________________________________
                                         Name: _________________________________
                                         Title:   ______________________________

                                      C-1

 
                                   EXHIBIT D

                       FORM OF ASSIGNMENT AND ASSUMPTION
                       ---------------------------------
                                    OF LOAN
                                    -------

                           ASSIGNMENT AND ASSUMPTION
                                    OF LOAN


          FOR VALUE RECEIVED, the receipt and sufficiency of which are hereby
acknowledged, EMBARCADERO CENTER ASSOCIATES, a California general partnership
("ASSIGNOR"), hereby sells, grants, assigns and transfers to __________________
("ASSIGNEE"), without recourse, representation or warranty (except as expressly
set forth in that certain Option and Put Agreement dated as of November ___,
1998, by and between Assignor and The Prudential Insurance Company of America),
and Assignee hereby purchases and assumes from Assignor, (i) all right, title
and interest of Assignor under and in connection with those certain promissory
notes evidencing the principal amount of _________________________ Dollars
($_______________), executed and delivered by Prudential Realty Securities,
Inc., as "maker" (the "REMAINDER NOTES"), and (ii) the rights of Assignor in, to
and under all documents and instruments listed on Exhibit A attached hereto and
                                                  ---------                    
incorporated herein by this reference, which documents and instruments further
evidence, secure and/or govern the Remainder Notes; but only to the extent that
such documents and instruments relate to the Remainder Notes (it being
acknowledged and agreed that the Remainder Notes are a portion of a
$_____________ loan and that the principal balance of such loan that is not
evidenced by the Remainder Notes (and all documents and instruments relating to
such principal balance) has been transferred to PIC Realty Corporation). The
Remainder Notes and all other documents listed on Exhibit A attached hereto to
                                                  ---------                   
the extent they relate to the Remainder Notes shall sometimes hereinafter be
collectively referred to as the "INVESTMENT LOAN DOCUMENTS".

          Assignee hereby accepts the foregoing assignment and agrees to assume,
pay, perform and discharge, as and when due, all of the agreements, obligations
and liabilities of Assignor under or arising from or out of the Remainder Notes
and the Investment Loan Documents (but only to the extent relating to the
Remainder Notes) to be paid, performed or discharged on and after the date
hereof and agrees to be bound by all of the terms and conditions of the
Investment Loan Documents to be performed on and after the date hereof (but only
to the extent relating to the Remainder Notes) (all such items, collectively,
the "POST-CLOSING OBLIGATIONS").

                                      D-1

 
          This Assignment shall be binding upon and inure to the benefit of
Assignor and Assignee, and their respective successors and assigns.

                         "ASSIGNOR"

                         EMBARCADERO CENTER ASSOCIATES,
                         a California General Partnership

                         By:  BOSTON PROPERTIES, LLC,
                              a Delaware limited liability company,
                              its Managing General Partner

                              By:   BOSTON PROPERTIES LIMITED
                                    PARTNERSHIP, a Delaware limited
                                    partnership, as Manager

                                    By:  BOSTON PROPERTIES, INC.,
                                         a Delaware corporation,
                                         as General Partner



                                         By:___________________________
                                         Name:_________________________
                                         Title:________________________


                         "ASSIGNEE"

                         [INSERT SIGNATURE BLOCK]

                                      D-1

 
                              JOINDER AND RELEASE
                              -------------------


          The undersigned, as maker of the Remainder Notes, hereby agrees to
release the Assignor from all Post-Closing Obligations and shall look only to
Assignee for satisfaction of the same.

                              PRUDENTIAL REALTY SECURITIES, INC.,
                              a Delaware corporation



                              By: _________________________________
                              Name: _______________________________
                              Title: ______________________________

                                      D-3

 

                                                                   Exhibit 99.21

                           OPTION AND PUT AGREEMENT


          THIS OPTION AND PUT AGREEMENT (this "AGREEMENT") is entered into as of
November 12, 1998, by and between THREE EMBARCADERO CENTER VENTURE, a California
general partnership ("OPTIONOR"), and THE PRUDENTIAL INSURANCE COMPANY OF
AMERICA, a New Jersey corporation ("PRUDENTIAL" and together with any permitted
assignee or designee hereunder hereinafter sometimes referred to as "OPTIONEE").

                                   RECITALS
                                   --------

          A.   Optionor is the "holder" of and "payee" under those certain
Senior Notes of even date herewith, executed and delivered by Prudential Realty
Securities, Inc., a Delaware corporation ("INVESTMENT LOAN BORROWER"), in the
aggregate principal amount of Seventy-Six Million Eight Hundred Ninety-Seven
Thousand and No/100 Dollars ($76,897,000.00) (the "INVESTMENT LOAN"), copies of
which notes are attached hereto as Exhibit A (the "INVESTMENT NOTES").  The
                                   ---------                               
Investment Notes were made pursuant to the Note Purchase Agreement of even date
herewith, by and between Optionor and Investment Loan Borrower (the "INVESTMENT
LOAN NOTE PURCHASE AGREEMENT").

          B.   Pursuant to that certain Redemption Agreement of even date
herewith, by and among Optionor, Prudential, Boston Properties LLC and BP EC3
Holdings LLC (the "REDEMPTION AGREEMENT"), the Investment Notes (or certain of
the Investment Notes or portions thereof as provided in accordance with the
terms and provisions of the Redemption Agreement) may be distributed (together
with cash, if necessary pursuant to the Redemption Agreement) to Prudential in
full redemption of its partnership interest in Optionor.  The date on which such
Investment Notes (or portions thereof) are distributed to Prudential and
Prudential's partnership interest in the Optionor is fully redeemed (such that
Prudential is no longer a partner or constituent of Optionor) pursuant to the
Redemption Agreement shall be referred to in this Agreement as the "REDEMPTION
DATE".

          C.   Pursuant to certain terms, provisions and conditions of the
Redemption Agreement, less than the entire principal face amount of all
Investment Notes may be distributed to Prudential on the Redemption Date.  In
such event, the Optionor may retain, as payee, a portion of the aggregate
principal amount of all Investment Notes (the "REMAINDER") after the Redemption
Date, which Remainder will be evidenced by one or more of the Investment Notes
that are retained by Optionor pursuant to the Redemption Agreement and, if
applicable pursuant to the terms and provisions of the Redemption Agreement and
the Investment Loan Note Purchase Agreement, a new promissory note issued by the
Investment Loan Borrower in accordance with Section 2 of the Redemption
Agreement, all of which notes shall have an aggregate principal amount equal to
the Remainder (collectively, the "REMAINDER NOTES").  All documents and
instruments evidencing, securing or relating to the Investment Notes or
Remainder Notes (including, without limitation, 

                                       1

 
the Investment Loan Note Purchase Agreement) shall be herein referred to as the
"INVESTMENT LOAN DOCUMENTS".

          D.   Optionee desires to acquire an option to purchase and acquire
Optionor's entire interest in, to and under any such Remainder Notes and
Optionor is willing to grant such option, and Optionor desires to acquire a put
right to cause Optionee to purchase and acquire Optionor's entire interest in,
to and under any such Remainder Notes and Optionee is willing to grant such put
right to Optionor, all upon the terms and conditions hereinafter set forth.

                                   AGREEMENT
                                   ---------

          NOW, THEREFORE, in consideration of the benefits accruing to the
parties hereto, and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged by Optionor and Optionee, Optionor
and Optionee hereby agree as follows:

          1.   OPTION.
               ------ 

          (A)  Grant of Option.  Optionor hereby unconditionally and irrevocably
               ---------------                                                  
grants, conveys, transfers and assigns to Optionee (or its designee) the
exclusive option and right to, subject to the terms and provisions of this
Agreement, acquire Optionor's entire right, title and interest in, to and under
all Remainder Notes in accordance with and subject to the terms and conditions
of this Agreement; provided that, Optionee shall assume all of Optionor's
                   -------- ----                                         
duties, obligations and liabilities arising under the Remainder Notes and the
Investment Loan Documents (but only to the extent the same relate to the
Remainder Notes) accruing from and after the Closing Date (the "OPTION").

          (B)  Term and Exercise of Option.  Optionee may exercise the Option at
               ---------------------------                                      
any time from and after the Redemption Date and on or before 6:00 p.m pacific
coast time on the earlier of (x) the date which is one hundred and sixty-five
(165) days after the Redemption Date and (y) August 31, 2002 (the "OPTION
ELECTION PERIOD") by giving Optionor no less than ten (10) business days'
written notice of exercise (the "OPTION ELECTION NOTICE"); provided that,
                                                           -------- ---- 
notwithstanding the foregoing, Optionee's right to give an Option Election
Notice and to purchase the Remainder Notes pursuant to its option shall be
suspended during any period of time while there exists an "Investment Loan
Borrower Credit Event" (as defined in Exhibit B attached hereto).  The Option
                                      ---------                              
Election Notice shall include (i) the proposed closing date, which shall not be
less than ten (10) business days after the delivery thereof nor more than twenty
(20) business days after the delivery thereof, and (ii) the Optionee's
calculation of the Fair Market Value (as defined in Section 3 below) of the
                                                    ---------              
Remainder Notes based on the proposed closing date.  In the event that the
Option is not exercised on or before the expiration of the Option Election
Period, or the transaction has not closed within twenty (20) business days after
the expiration of the Option Election Period for any reason other than the
default of the Optionor, then the Option shall become null and void and of no
further force or effect, and the parties hereto shall be released from all
further liabilities and obligations hereunder with respect to the Option (except
as otherwise expressly provided herein).

                                       2

 
          (C)  Option Fee.  No later than three (3) calendar days after the
               ----------                                                  
execution of this Agreement by Optionor and Optionee, Optionee shall pay to
Optionor the sum of One Hundred Dollars ($100) (the "OPTION FEE").  The Option
Fee is non-refundable (except as otherwise expressly provided in this
Agreement); provided that, the Option Fee shall be credited against the Purchase
            -------- ----                                                       
Price (as defined in Section 3 below) payable at Closing (as defined in Section
                     ---------                                          -------
4(a) below).
- ----        

          2.   PUT.
               --- 

          (A)  Grant of Put.  Optionee hereby unconditionally and irrevocably
               ------------                                                  
grants, conveys, transfers and assigns to Optionor the exclusive right to,
subject to the terms and provisions of this Agreement, put and sell to Optionee
Optionor's entire right, title and interest in, to and under all Remainder Notes
in accordance with and subject to the terms and conditions of this Agreement
(the "PUT").  Optionee shall be obligated to acquire such Remainder Notes upon
the exercise of Optionor's Put and to assume all of Optionor's duties,
obligations and liabilities arising under the Remainder Notes and the Investment
Loan Documents (but only to the extent the same relate to the Remainder Notes)
accruing from and after the Closing Date.  In the event that Optionor exercises
its Put, the Option Fee shall be credited against the Purchase Price payable at
Closing.

          (B)  Term and Exercise of Put.  Optionor may exercise the Put at any
               ------------------------                                       
time during the Put Period (defined immediately below) by giving Optionee no
less than ten (10) business days' written notice of exercise (the "PUT ELECTION
NOTICE") at any time prior to the expiration of the Put Period; provided that,
                                                                -------- ---- 
notwithstanding the foregoing, Optionor's right to give a Put Election Notice
and to put the Remainder Notes to Optionee pursuant to this Agreement shall be
suspended during any period of time while the Remainder Notes have been
accelerated and such acceleration has not been rescinded by the holders of the
Remainder Notes.  The Put Election Notice shall include (i) the proposed closing
date, which shall not be less than ten (10) business days after the delivery
thereof nor more than twenty (20) business days after the delivery thereof, and
(ii) the Optionor's calculation of the Fair Market Value of the Remainder Notes
based on the proposed closing date.  In the event that the Put is not exercised
prior to the expiration of the Put Period, and the transaction has not closed on
or before the date which is twenty (20) business days after the expiration of
the Put Period for any reason other than the default of the Optionee, then the
Put shall become null and void and of no further force or effect, and the
parties hereto shall be released from all further liabilities and obligations
hereunder with respect to the Put (except as otherwise expressly provided
herein).  As used herein, the "PUT PERIOD" shall mean the period of time
commencing on the thirty-first (31st) day after the expiration of the Option
Election Period and expiring at 6:00 p.m. pacific coast time on the thirtieth
(30th) day thereafter.

          3.   PURCHASE PRICE.  The total purchase price ("PURCHASE PRICE")
               --------------                                              
which Optionee shall pay to Optionor for the Remainder Notes upon the exercise
of the Option or Put shall be the Fair Market Value of such Remainder Notes on
the date of Closing.  At Closing, Optionee shall pay to Optionor the entire
balance of the Purchase Price, over and above the Option 

                                       3

 
Fee previously paid to Optionor and credited to the Purchase Price in accordance
with the terms and provisions of Sections 1(c) and 2(a) above (provided that the
                                 -------------     ----
parties acknowledge and agree that no interest or other income earned by
Optionor on the Option Fee shall be credited against the Purchase Price), by
wire transfer of immediately available funds. The "FAIR MARKET VALUE" of the
Remainder Notes shall be calculated and determined as of the Closing Date as
provided in Exhibit B attached hereto.
            ------- -
                 

          4.   CLOSING.
               ------- 

          (A)  Closing.  Upon exercise of the Option or Put as provided in (and
               -------                                                         
in accordance with) any of Sections 1 or 2 above, the purchase and sale of the
                           ----------    -                                    
Remainder Notes shall close on the closing date specified in the Option Election
Notice or Put Election Notice, as applicable, in accordance with the terms of
Sections 1(b) and 2(b), respectively (the "CLOSING DATE").  As used herein, the
- -------------     ----                                                         
term "CLOSING" means the date and time that the Purchase Price due under Section
                                                                         -------
3 above is paid to Optionor for the Remainder Notes, and the Remainder Notes are
- -                                                                               
endorsed to the order of Optionee and all other documents and instruments of
transfer and assumption are executed and delivered by the parties in accordance
with the terms and provisions of subsection (b) below.
                                 --------------       

          (B)  Closing Procedure.  The sale of the Remainder Notes shall be
               -----------------                                           
consummated on the Closing Date as follows:

               (I)   On or before the Closing Date, Optionor shall execute and
     deliver to Optionee (A) an Allonge to each Remainder Note in the form of
     Exhibit C attached hereto (the "ALLONGE"); (B) counterpart originals of an
     ---------                                                                 
     Assignment and Assumption of Loan in the form of Exhibit D attached hereto
                                                      ---------                
     (the "ASSIGNMENT"), executed by Optionor; and (C) the original Remainder
     Notes and originals or copies of all other Investment Loan Documents in
     Optionor's possession or within its control.

               (II)  On or before the Closing Date, Optionee shall deliver to
     Optionor, (A) in immediately available funds the Purchase Price (less the
     Option Fee) and such additional amounts as may be required to satisfy
     Optionee's share of any Closing costs; and (B) counterpart originals of the
     Assignment, executed by Optionee.

               (III) All reasonable Closing and escrow fees and costs incurred
     in connection with the transactions described in this Agreement shall be
     paid fifty percent (50%) by Optionor and fifty percent (50%) by Optionee;
     provided that, each party hereto shall bear the expense of its own counsel.
     -------- ----                                                              

          5.   OPTIONOR'S REPRESENTATIONS AND WARRANTIES.  Optionor hereby
               -----------------------------------------                  
represents and warrants to Optionee as of the date hereof and as of the Closing
Date as follows:

                                       4

 
          (A)  Subject to the rights of Prudential under the Redemption
Agreement, Optionor is the sole owner of the Investment Notes on the date
hereof, and on the Closing Date, Optionor shall be the sole owner of the
Remainder Notes.  Further, the Investment Notes are free and clear of all liens
and third party interests on the date hereof (other than the interests and
rights in favor of Prudential under the Redemption Agreement and any pledge of
the Investment Notes securing the Equity Redemption Loan (as defined in the
Redemption Agreement)), and on the Closing Date, the Remainder Notes shall be
free and clear of all liens and third party interests of any kind or nature,
except as created by this Agreement.  Optionor has not amended, modified,
terminated or otherwise by written agreement altered the Investment Notes or
other Investment Loan Documents except as specifically disclosed to Optionee in
writing prior to the date hereof, and on the Closing Date, except as otherwise
amended, modified or altered in connection with the transactions contemplated in
the Redemption Agreement, Optionor shall not have amended, modified, terminated
or otherwise altered the Investment Notes, Remainder Notes or other Investment
Loan Documents without Optionee's written consent obtained in accordance with
Section 7 hereof.
- ---------        

          (B)  As of the date hereof, Optionor has not assigned or transferred
the Investment Notes or any of the other Investment Loan Documents (except for
any pledge of the Investment Notes securing the Equity Redemption Loan), nor are
there any agreements to assign or convey any portion of such Investment Loan
Documents to any person other than Optionee and Prudential in accordance with
this Agreement and the Redemption Agreement, respectively.  On the Closing Date,
Optionor shall not have assigned or transferred the Remainder Notes or any of
the other Investment Loan Documents (except for such portion of the Investment
Notes transferred to Prudential in accordance with the Redemption Agreement),
nor shall there be any agreements to assign or convey the Remainder Notes or any
portion of such Investment Loan Documents to any person other than Optionee
(except with respect to Prudential's rights under the Redemption Agreement).

          (C)  To Optionor's knowledge, Optionor has all requisite power and
authority to execute and deliver, and to perform all of its obligations under,
this Agreement and all instruments and other documents to be executed and
delivered to Optionee in connection with the transactions described herein.

          (D)  To Optionor's knowledge, Optionor is a duly formed general
partnership under the laws of the State of California, and this Agreement, and
all the instruments and documents to be executed and delivered by Optionor in
connection herewith, are legal, valid and binding obligations of Optionor
enforceable against it in accordance with their respective terms, except to the
extent that enforcement may be limited by applicable bankruptcy, insolvency,
moratorium and other principles relating to or limiting the rights of
contracting parties generally.

          (E)  To Optionor's knowledge, the execution of this Agreement and the
performance of Optionor's obligations hereunder will not conflict with or result
in a breach of any statute, rule, regulation, judgment, decree or order of any
court, board, committee or governmental agency to 

                                       5

 
which Optionor is subject, nor violate any agreement or contract to which
Optionor is a party or by which Optionor is bound. To Optionor's knowledge, no
consent, approval, authorization or order of any court or governmental agency or
body is required for the execution, delivery and performance by Optionor of, or
compliance by Optionor with, this Agreement or the consummation of the
transactions contemplated by it, except for such consents, approvals,
authorizations or orders, if any, that have been obtained.

Each of the foregoing representations and warranties shall survive the Closing
for a period of twelve (12) months immediately thereafter.

          6.   OPTIONEE'S REPRESENTATIONS, WARRANTIES AND ACKNOWLEDGMENTS.
               ---------------------------------------------------------- 
Optionee hereby represents, warrants and acknowledges to Optionor as of the date
hereof and as of the Closing Date as follows:

          (A)  Optionee is a corporation duly organized, validly existing and in
good standing under the laws of the State of New Jersey.  Optionee has all
requisite power and authority to execute and deliver, and to perform all of its
obligations under, this Agreement and all instruments and other documents
executed and delivered by Optionee in connection with the transactions
contemplated herein.  This Agreement, and all the instruments and documents to
be executed and delivered by Optionee in connection herewith, are legal, valid
and binding obligations of Optionee enforceable against it in accordance with
their respective terms, except to the extent that enforcement may be limited by
applicable bankruptcy, insolvency, moratorium and other principles relating to
or limiting the rights of contracting parties generally.

          (B)  The execution, delivery and performance of this Agreement has
been duly authorized by all necessary action on the part of Optionee and does
not require any consent or approval of any party that has not been obtained.

          (C)  The execution of this Agreement and the performance of Optionee's
obligations hereunder will not conflict with or result in a breach of any
statute, rule, regulation, judgment, decree or order of any court, board,
committee or governmental agency to which Optionee is subject, nor violate any
agreement or contract to which Optionee is a party or by which Optionee is
bound.  No consent, approval, authorization or order of any court or
governmental agency or body is required for the execution, delivery and
performance by Optionee of, or compliance by Optionee with, this Agreement or
the consummation of the transactions contemplated by it, except for such
consents, approvals, authorizations or orders, if any, that have been obtained.

          (D)  Optionee has made, and will make, prior to the Closing, such
examination, review and investigation of the facts and circumstances as
necessary to evaluate the Remainder Notes.  Optionee further acknowledges that
in acquiring the Remainder Notes, Optionee is assuming the risk of full or
partial loss which is inherent with the credit, collateral and collectibility
risks associated with the quality and character of the loan evidenced by the
Remainder Notes.

                                       6

 
          (E)  Optionee is an "accredited investor" as defined in Regulation D
under the Securities Act of 1933, as amended.  The Remainder Notes will be
acquired by Optionee for its own account for investment only and not with a view
to, or with any intention of, a distribution or resale thereof, in whole or in
part.

          (F)  Optionee has not relied upon any representations, warranties or
statements of any kind made by, or on behalf of, Optionor, except as
specifically set forth in this Agreement. Optionee acknowledges that, except for
the express representations and warranties by Optionor set forth in, or to be
made in instruments delivered pursuant to, this Agreement, Optionor negates and
disclaims all representations, warranties and statements of every kind or type
(express or implied) and, except for the Optionor's representations and
warranties set forth herein, the Remainder Notes are being acquired "as is" with
no recourse to Optionor for any default thereunder or diminution in value with
respect thereto.

Each of the foregoing representations and warranties shall survive the Closing
for a period of twelve (12) months immediately thereafter.

          7.   COVENANTS.  Optionor hereby covenants and agrees that, from and
               ---------                                                      
after the date hereof, except as otherwise contemplated in and permitted by the
Redemption Agreement, Optionor will not, without Optionee's prior written
consent, (a) amend, modify, cancel or terminate, any of the Investment Notes,
Remainder Notes or Investment Loan Documents in any manner which will adversely
affect or impact the interest of the "payee" under the Remainder Notes and
Investment Loan Documents if and when such Remainder Notes are transferred to
Optionee, (b) waive, relinquish or allow to lapse any right of Optionor as
"lender/payee" under the Investment Notes, Remainder Notes or Investment Loan
Documents which will in any manner adversely affect or impact the interest of
the "payee" under the Remainder Notes and other Investment Loan Documents if and
when such Remainder Notes are transferred to Optionee, or (c) agree or consent
to any agreements or understandings that will impact the Remainder Notes if and
when such Remainder Notes are transferred to Optionee.  In furtherance of the
foregoing, except for the transfer of Investment Notes to Prudential pursuant to
the Redemption Agreement and any pledge of the Investment Notes to secure the
Equity Redemption Loan, Optionor shall not sell, assign or otherwise transfer
any of the Investment Notes or Remainder Notes prior to the expiration of the
Option Election Period; provided that, (i) Optionor shall be permitted to
                        -------- ----                                    
transfer any Remainder Notes after the "Redemption Distribution" under the
Redemption Agreement subject to this Agreement, and (ii) all restrictions on the
transferability of the Investment Notes and Remainder Notes shall cease upon the
expiration of the Option Election Period and Optionor shall thereafter be
permitted to freely transfer the Investment Notes and/or Remainder Notes without
restriction.  Upon written request by either party at or prior to the Closing,
the other party shall give to the requesting party written notice of any newly
discovered information that causes any of the representations or warranties of
such responding party made in this Agreement to be materially untrue or
incorrect, or of the occurrence of any event or circumstance that would
materially modify or affect the substance of such representations and
warranties.

                                       7

 
          8.   CONFIDENTIALITY; PRESS RELEASES.  Each party hereto hereby agrees
               -------------------------------                                  
that, except as required by law or the regulations of an exchange on which
securities of such party are listed or unless compelled by an order of a court,
and except for such disclosures to each party's lenders, consultants, attorneys,
prospective investors, agents, assignees, partners, officers, directors,
employees and advisors as may be necessary or advisable in connection with the
consummation of the transactions contemplated herein (provided each such person
is instructed to comply with the terms of this confidentiality provision), it
shall keep the contents of this Agreement and the transactions contemplated
hereby confidential and further agrees to refrain from generating or
participating in any publicity statement, press release, or other public notice
regarding this Agreement or the transactions contemplated hereby, without the
prior written consent of the other party, which consent shall not be
unreasonably withheld.  The terms and provisions of this Section 8 shall survive
                                                         ---------              
the Closing or any termination of this Agreement and shall not be merged into
any instrument or conveyance delivered at the Closing.

          9.   COMMISSIONS.  Optionor and Optionee each agrees to indemnify,
               -----------                                                  
defend, protect and hold the other harmless from and against any and all
commissions, finder's and/or similar fees or compensation claimed by any broker
or finder in connection with Optionee's purchase of the Remainder Notes based on
claimed contacts with, or other acts or omissions of, such indemnifying party.
The terms and provisions of this Section 9 shall survive the Closing or
                                 ---------                             
termination of this Agreement.

          10.  REMEDIES.  In the event of any material breach by either party to
               --------                                                         
this Agreement, the remedy at law in favor of the other party may be inadequate
and such other party, in addition to all other rights and remedies which may be
available to it at law or in equity, shall have the right of specific
performance in the event of any material breach, or injunction in the event of
an anticipatory material breach, of this Agreement by the other party.
Furthermore, upon the material breach of this Agreement by any party, the other
party shall have the right to terminate this Agreement and to recover its
damages, and, upon a material breach by Optionor, Optionee shall also have the
right to receive a refund of the Option Fee.  Such refund of the Option Fee
shall be in addition to, and not in lieu of, any other remedies which Optionee
may have against Optionor at law or in equity arising from Optionor's breach.

          11.  INDEMNIFICATION.  Optionor hereby agrees to indemnify, protect,
               ---------------                                                
defend, save and hold harmless Optionee, and Optionee's trustees, officers,
directors, shareholders, beneficiaries, members, partners, agents, employees,
investment advisors and independent contractors from and against any and all
duties, obligations, liabilities, suits, claims, demands, causes of action,
costs and expenses (including, without limitation, reasonable attorneys' fees
and costs), arising out of a breach by the Optionor of any of its
representations and warranties made in Section 5.  Optionee hereby agrees to
                                       ---------                            
indemnify, protect, defend, save and hold harmless Optionor, and Optionor's
trustees, officers, directors, shareholders, beneficiaries, members, partners,
agents, employees, investment advisors and independent contractors from and
against any and all duties, obligations, liabilities, suits, claims, demands,
causes of action, costs and expenses (including, without limitation, reasonable
attorneys' fees and costs), arising out of a 

                                       8

 
breach by the Optionee of any of its representations and warranties made in
Section 6. The terms and provisions of this Section 11 shall survive the Closing
- ---------                                   ----------
or the termination of this Agreement for a period of twelve (12) months
immediately thereafter.

          12.  ESCROW INSTRUCTIONS.  Upon the request of either Optionor or
               -------------------                                         
Optionee, the parties hereto shall execute and deliver any and all escrow
documents reasonably approved by such party and perform any and all acts
reasonably necessary or appropriate to open and enter into an escrow in order to
consummate the transactions contemplated herein.  Such agreements may include,
without limitation, customary escrow instructions (including, without
limitation, standard general terms and conditions to the extent the appointed
escrow agent demands such provisions in order to serve as escrow agent), as may
be reasonably necessary or desirable in order to enable the escrow agent to
comply with the terms of this Agreement.  The escrow agent shall be selected by
the party making the request for an escrow (and shall not be affiliated with
such party), but shall be subject to the written approval of the other party,
which approval shall not be unreasonably withheld or delayed.  The parties shall
share equally the costs and expenses of the escrow and escrow agent.

          13.  MISCELLANEOUS.
               ------------- 

          (A)  Authority.  Each individual and entity executing this Agreement
               ---------                                                      
represents and warrants that he, she or it has the capacity set forth on the
signature pages hereof with full power and authority to bind the party on whose
behalf he, she or it is executing this Agreement to the terms hereof.

          (B)  Further Assurances.  Optionor and Optionee shall each execute and
               ------------------                                               
deliver to the other such further documents and instruments as may be reasonably
requested by either of them in order to effectuate the intent of this Agreement
and to obtain the full benefit of this Agreement.  Any request by either party
under this Section 13(b) shall be accompanied by the document proposed for
           -------------                                                  
signature by the party requesting it, in form and substance satisfactory to the
party of whom the request is made and its attorneys.  The party making the
request shall bear and discharge any fees or expenses incident to the
preparation, filing or recording of the document requested pursuant to this
Section 13(b).
- ------------- 

          (C)  Time of the Essence.  Time is of the essence in the performance
               -------------------
of and compliance with each of the provisions of this Agreement.

          (D)  Governing Law.  This Agreement shall be governed by and
               -------------                                          
interpreted in accordance with the laws of the State of California, without
reference to California's conflicts or choice of law principles.

          (E)  Entire Agreement.  THIS AGREEMENT, THE MASTER TRANSACTION
               ----------------                                         
AGREEMENT OF EVEN DATE HEREWITH, BY AND AMONG PRUDENTIAL, PIC REALTY
CORPORATION, CERTAIN PERSONS LISTED ON EXHIBIT A THERETO, 

                                       9

 
FEDMARK CORPORATION, EMBARCADERO CENTER INVESTORS PARTNERSHIP, PACIFIC PROPERTY
SERVICES, L.P., BOSTON PROPERTIES LIMITED PARTNERSHIP AND BOSTON PROPERTIES,
INC. AND ALL TRANSACTION DOCUMENTS DESCRIBED THEREIN (COLLECTIVELY, THE
"TRANSACTION DOCUMENTS") REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES AND
MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENT ORAL
AGREEMENT OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE
PARTIES. The parties make no representations or warranties to each other, except
as specifically contained in this Agreement or in the accompanying exhibits or
the certificates or other closing documents delivered according to this
Agreement or in the other Transaction Documents. All prior agreements and
understanding between the parties hereto with respect to the transactions
contemplated hereby, whether verbal or in writing, are superseded by, and are
deemed to have been merged into, this Agreement and all other Transaction
Documents. Any waiver, modification, consent or acquiescence with respect to any
provision of this Agreement shall be set forth in writing and duly executed by
or in behalf of the party to be bound thereby. No waiver by any party of any
breach hereunder shall be deemed a waiver of any other or subsequent breach.

          (F)  Modifications.  This Agreement may not be changed, waived,
               -------------                                             
discharged or terminated orally, but only by an instrument in writing signed by
the party against which enforcement of such change, waiver, discharge or
termination is sought.

          (G)  Severability.  If any provision of this Agreement shall be
               ------------                                              
determined to be invalid, illegal or unenforceable, the balance of this
Agreement shall remain in full force and effect and if any provision is
inapplicable to any person or circumstance, it shall nevertheless remain
applicable to all other persons and circumstances.

          (H)  Assignee; Designee.  Optionee may assign this Agreement or
               ------------------                                        
designate a designee to acquire Optionor's entire right, title and interest in
and to the Remainder Notes at any time prior to the Closing; provided that, in
                                                             -------- ----    
no event shall Prudential be released from any of the obligations or liabilities
of the "Optionee" hereunder without the prior written consent of Optionor.  This
Agreement may not otherwise be assigned, nor may any interest herein be
assigned, by Optionee without Optionor's prior written consent.

          (I)  Notices.  All notices, elections, consents, approvals, demands,
               -------                                                        
objections, requests or other communications which any party hereto may be
required or desire to give to the other party hereto must be in writing and sent
by (i) first class U.S. certified or registered mail, return receipt requested,
with postage prepaid, (ii) telecopy or facsimile (with a copy sent by first
class U.S. certified or registered mail, return receipt requested, with postage
prepaid), or (iii) express mail or a nationally recognized courier (for next
business day delivery).  A notice or other communication sent in compliance with
the provisions of this Section 13(i) shall be deemed given and received on (a)
                       -------------                                          
the third (3rd) day following the date it is deposited in the U.S. mail, (b) the
date of confirmed dispatch if sent by facsimile or telecopy (provided that a
copy thereof is sent by 

                                       10

 
mail in the manner provided in clause (i) above), or (c) the date it is
                               ----------               
delivered to the other party if sent by express mail or courier. The addresses
for the parties are as follows:

          All notices and other communications to Optionor shall be given to it
at:

          c/o Boston Properties, Inc.
          8 Arlington Street
          Boston, Massachusetts 02116-3495
          Attention:  General Counsel
          Facsimile No.:  (617) 421-1555

          with a copy to:

          Goulston & Storrs, P.C.
          400 Atlantic Avenue
          Boston, Massachusetts 02110-3333
          Attention:  Eli Rubenstein, Esq.
          Facsimile No.:  (617) 574-4112

          All notices and other communications to Optionee shall be given to it
at:

          The Prudential Insurance Company of America
          Prudential Realty Group
          8 Campus Drive, 4th Floor
          Arbor Circle South
          Parsippany, New Jersey 07054
          Attention:  John R. Triece
          Facsimile No.:  (201) 734-1472

          with a copy to:

          The Prudential Insurance Company of America
          Prudential Capital Group
          Four Embarcadero Center
          Suite 2700
          San Francisco, California 94111
          Attention:  Harry N. Mixon, Esq.
          Facsimile No.:  (415) 956-2197

          and a copy to:

          O'Melveny & Myers LLP
          Embarcadero Center West

                                       11

 
          275 Battery Street
          Suite 2600
          San Francisco, California 94111
          Attention:   Stephen A. Cowan, Esq.
          Facsimile No.:   (415) 984-8701

Any party may designate another addressee or change its address for notices and
other communications hereunder by a notice given to the other parties in the
manner provided in this Section 13(i).
                        ------------- 

          (J)  Attorneys' Fees.  If any action is brought by either party
               ---------------
against the other party relating to or arising out of this Agreement, the
transactions described herein or the enforcement hereof, the prevailing party
shall be entitled to recover from the other party reasonable attorneys' fees and
costs incurred in connection with the prosecution or defense of such action. For
purposes of this Agreement, the term "ATTORNEYS' FEES" or "ATTORNEYS' FEES AND
COSTS" shall mean the fees and expenses of counsel to the parties hereto, which
may include printing, photostating, duplicating and other expenses, air freight
charges, and fees billed for law clerks, paralegals and other persons not
admitted to the bar but performing services under the supervision of an
attorney, and the costs and fees incurred in connection with the enforcement or
collection of any judgment obtained in any such proceeding.

          (K)  Counterparts.  This Agreement may be executed in one or more
               ------------                                                
counterparts, each of which shall constitute an original, but all of which, when
taken together, shall constitute only one instrument.  The signature page of any
counterpart may be detached therefrom without impairing the legal effect of the
signature(s) thereon provided such signature page is attached to any other
counterpart identical thereto except having additional signature pages executed
by other parties to this Agreement attached thereto.

          (L)  Successors and Assigns.  This Agreement shall be binding upon and
               ----------------------                                           
inure to the benefit of each of the parties hereto and to their respective
permitted transferees, successors and assigns.

          (M)  Exhibits.  All Exhibits attached hereto are hereby incorporated
               --------                                                       
herein.

          (N)  No Third Party Beneficiaries.  Persons who are not parties to
               ----------------------------
this Agreement shall have no rights or privileges (whether as a third party
beneficiary or otherwise) under or by virtue of this Agreement.

          (O)  Business Days.  In the event that any of the dates specified in
               -------------                                                  
this Agreement shall fall on a Saturday, Sunday, or a holiday recognized by the
State of California or the Commonwealth of Massachusetts, then the date of such
action shall be deemed to be extended to the next business day.

                                       12

 
          (P)  Consent to Jurisdiction and Service of Process.  ALL JUDICIAL
               ----------------------------------------------               
PROCEEDINGS BROUGHT AGAINST ANY PERSON ARISING OUT OF OR RELATING TO THIS
AGREEMENT MAY BE BROUGHT IN ANY STATE OR FEDERAL COURT OF COMPETENT JURISDICTION
IN THE STATE OF CALIFORNIA, AND BY EXECUTION AND DELIVERY OF THIS AGREEMENT EACH
PARTY HERETO ACCEPTS FOR ITSELF, GENERALLY AND UNCONDITIONALLY, THE NONEXCLUSIVE
JURISDICTION OF THE AFORESAID COURTS AND WAIVES ANY DEFENSE OF FORUM NON
CONVENIENS AND IRREVOCABLY AGREES TO BE BOUND BY ANY JUDGMENT RENDERED THEREBY
IN CONNECTION WITH THIS AGREEMENT.  Each party hereby agrees that service of all
process in any such proceeding in any such court may be made by registered or
certified mail, return receipt requested, to any other party hereto, at its
address provided in this Agreement, such service being hereby acknowledged by
each party to be sufficient for personal jurisdiction in any action against such
party in any such court and to be otherwise effective and binding service in
every respect.  Nothing herein shall affect the right to serve process in any
other manner permitted by law.

          (Q)  Waiver of Jury Trial.  EACH OF THE PARTIES TO THIS AGREEMENT
               --------------------                                        
HEREBY AGREES TO WAIVE ITS RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR
CAUSE OF ACTION BASED UPON OR ARISING OUT OF THIS AGREEMENT OR ANY DEALINGS
RELATING TO THE SUBJECT MATTER OF THIS AGREEMENT. The scope of this waiver is
intended to be all-encompassing of any and all disputes that may be filed in any
court and that relate to the subject matter of this transaction, including,
without limitation, contract claims, tort claims, breach of duty claims and all
common law and statutory rights.  Each party hereto acknowledges that this
waiver is a material inducement to enter into a business relationship, that each
has already relied on this waiver in entering into this Agreement, and that each
shall continue to rely on this waiver in their related future dealings.  Each
party hereto further warrants and represents that it has reviewed this waiver
with its legal counsel and that it knowingly and voluntarily waives its jury
trial rights following consultation with such legal counsel.  THIS WAIVER IS
IRREVOCABLE, MEANING THAT IT MAY NOT BE MODIFIED EITHER ORALLY OR IN WRITING,
AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS
OR MODIFICATIONS OF THIS AGREEMENT.  In the event of litigation, this Agreement
may be filed as a written consent to a trial by the court.



                           [SIGNATURES ON NEXT PAGE]

                                       13

 
          IN WITNESS WHEREOF, the undersigned have duly executed this Agreement
as of the date first above written.

                              "OPTIONOR"

                              THREE EMBARCADERO CENTER VENTURE,
                              a California General Partnership

                              By:   BOSTON PROPERTIES LLC,
                                    a Delaware limited liability company,
                                    as Managing General Partner

                                    By:  BOSTON PROPERTIES LIMITED
                                         PARTNERSHIP, a Delaware limited
                                         partnership, as Manager

                                         By:  BOSTON PROPERTIES,
                                              INC., a Delaware corporation,
                                              as General Partner



                                              By: /s/ Thomas J. O'Connor
                                                 -------------------------
                                              Name: Thomas J. O'Connor
                                              Title: Vice President


                              "OPTIONEE"

                              THE PRUDENTIAL INSURANCE COMPANY
                              OF AMERICA, a New Jersey corporation


                              By: /s/ Gary L. Frazier
                                 -----------------------------------------
                              Name: ________________________________
                              Title: _______________________________

                                      S-1

 
                                    JOINDER


          The undersigned, as maker of the Remainder Notes, agrees that on the
Closing Date, at the request of Optionor, it will execute the Joinder and
Release on the Assignment and Assumption of Loan in the form attached hereto as
Exhibit D, which will be executed at such Closing.
- ---------                                         


                              PRUDENTIAL REALTY SECURITIES, INC.,
                              a Delaware corporation



                              By: /s/ Paul D. Egan
                                 ---------------------------------------
                              Name: Paul D. Egan
                              Title: Vice President

                                      S-2

 
                                   EXHIBIT A

                               INVESTMENT NOTES
                               ----------------

                                      A-1

 
                                   EXHIBIT B

                                CALCULATION OF
                               FAIR MARKET VALUE
                               -----------------


     The Fair Market Value of the Remainder Notes shall equal the aggregate
Remaining Cash Flow for all Remainder Notes discounted from each respective
scheduled payment due date to the Closing Date at a discount factor equal to the
Discount Rate for each such Remainder Note. Notwithstanding the foregoing, if on
the Determination Date an Investment Loan Borrower Credit Event exists, then
Optionor shall appoint an investment banking firm of national recognition (which
will be satisfactory to Optionee in its reasonable discretion) to determine the
change in the Fair Market Value of the Remainder Notes for purposes of this
Agreement.  In the event that an investment banking firm is appointed to
determine the change in the Fair Market Value of any Remainder Note as of the
Determination Date pursuant to the preceding sentence, such investment banking
firm shall be instructed to determine the change in the Fair Market Value of
such Remainder Note based on the following four factors: (i) changes in market
interest rates since the date of funding of the Remainder Note, (ii) the time
period remaining from the Determination Date until the earlier of the next Rate
Reset Date of such Remainder Note and the maturity of the Remainder Note, (iii)
the Remaining Cash Flow (as defined below) of the Remainder Note, and (iv)
changes in the credit quality of the Remainder Note since the date of funding
thereof.  The parties agree that an acceptable investment banking firm would be
Goldman Sachs or Merrill Lynch.  As used herein, the term "INVESTMENT LOAN
BORROWER CREDIT EVENT" shall mean any of the following events: (x) the credit
rating of the Remainder Notes has been downgraded from the credit rating of the
Remainder Notes on the date hereof by both of the Rating Agencies, or (y) in the
reasonable discretion of the managing general partner of Optionor, there has
been, as compared to the date hereof, a material diminution or degradation in
the value of the assets of the Investment Loan Borrower or the ability of the
Investment Loan Borrower to pay its outstanding obligations as they become due
from the date hereof.


                                 Defined Terms
                                 -------------

     As used herein, the following terms shall have the following meanings:

     "DETERMINATION DATE" shall mean the date upon which the Fair Market Value
of the Remainder Notes is determined and shall occur at 10:00 a.m. (New York
City time) on the date that the Option Election Notice or Put Election Notice,
as the case may be, is received by the addressee thereof.

     "DISCOUNT RATE" shall mean the Reinvestment Rate plus the Margin.

                                      B-1

 
     "MARGIN" shall mean, with respect to any Remainder Note, the Margin (as
defined in the Investment Loan Note Purchase Agreement) of such Remainder Note.

     "RATING AGENCIES" shall mean Fitch IBCA, Inc. and Standard and Poor's
Corporation.

     "REINVESTMENT RATE" shall mean, with respect to any Remainder Note, the
offered-side yield to maturity as of the Determination Date of the U.S. Treasury
security that was used to determine the then Treasury (as defined in the
Investment Loan Note Purchase Agreement) of such Investment Note.

     "REMAINING CASH FLOW" shall mean, for any Remainder Note, the aggregate
amount of all accrued and unpaid interest, principal and other payments under
such Remainder Note on the Closing Date and all principal, interest and other
payments that will become due and owing under such Remainder Note from time to
time from and after the Closing Date through (x) the next Rate Reset Date of
such Remainder Note (the "Next Reset Date"), if the Fair Market Value is
determined prior to such Rate Reset Date, or (y) the maturity of such Remainder
Note (including, without limitation, any balloon or other principal payments due
and owing on said maturity date), if the Fair Market Value is determined after
all Rate Reset Dates provided in such Remainder Note, as each such payment would
become due and payable pursuant to the terms of the applicable Remainder Note
and the Investment Loan Documents ( but assuming, if clause (x) above applies,
                                                     ----------
that any interest that is scheduled to be accrued but unpaid as of the Next
Reset Date (i.e., because the interest payment date with respect thereto will
            ---- 
not have occurred), and any outstanding principal and any other amounts under
the Investment Note on such Next Reset Date, will be repaid in full on the Next
Reset Date; and further assuming, for purposes of calculating all future
interest payments due under such Remainder Note, that the interest rate in
effect with respect to the Remainder Note on the Closing Date will remain
constant for purposes of determining the Fair Market Value of such Remainder
Note).

                                      B-2

 
                                   EXHIBIT C

                      FORM OF ALLONGE TO REMAINDER NOTES
                      ----------------------------------


Date of Note:  ____________________
Maker:  Prudential Realty Securities, Inc.
Face Amount:   $__________________


PAY TO THE ORDER OF __________________________________, WITHOUT RECOURSE,
REPRESENTATION OR WARRANTY, EXCEPT AS SPECIFICALLY PROVIDED IN THAT CERTAIN
OPTION AND PUT AGREEMENT DATED AS OF NOVEMBER ___, 1998, BY AND AMONG THREE
EMBARCADERO CENTER VENTURE, AS OPTIONOR, AND THE PRUDENTIAL INSURANCE COMPANY OF
AMERICA, AS OPTIONEE.

Dated:  ______________, 199__



                         THREE EMBARCADERO CENTER VENTURE,
                         a California general partnership

                         By:  BOSTON PROPERTIES LLC,
                              a Delaware limited liability company,
                              its Managing General Partner

                              By:   BOSTON PROPERTIES LIMITED
                                    PARTNERSHIP, a Delaware limited
                                    partnership, as Manager

                                    By:  BOSTON PROPERTIES, INC.
                                         a Delaware Corporation,
                                         as General Partner


                                         By:  __________________________________
                                         Name: _________________________________
                                         Title:   ______________________________

                                      C-1

 
                                   EXHIBIT D

                       FORM OF ASSIGNMENT AND ASSUMPTION
                       ---------------------------------
                                    OF LOAN
                                    -------


                           ASSIGNMENT AND ASSUMPTION
                                    OF LOAN


          FOR VALUE RECEIVED, the receipt and sufficiency of which are hereby
acknowledged, THREE EMBARCADERO CENTER VENTURE, a California general partnership
("ASSIGNOR"), hereby sells, grants, assigns and transfers to __________________
("ASSIGNEE"), without recourse, representation or warranty (except as expressly
set forth in that certain Option and Put Agreement dated as of ________, 1998,
by and between Assignor and The Prudential Insurance Company of America), and
Assignee hereby purchases and assumes from Assignor, (i) all right, title and
interest of Assignor under and in connection with those certain promissory notes
evidencing the principal amount of _________________________ Dollars
($_______________), executed and delivered by Prudential Realty Securities,
Inc., as "maker" (the "REMAINDER NOTES"), and (ii) the rights of Assignor in, to
and under all documents and instruments listed on Exhibit A attached hereto and
                                                  ---------                    
incorporated herein by this reference, which documents and instruments further
evidence, secure and/or govern the Remainder Notes; but only to the extent that
such documents and instruments relate to the Remainder Notes (it being
acknowledged and agreed that the Remainder Notes are a portion of a
$_____________ loan and that the principal balance of such loan that is not
evidenced by the Remainder Notes (and all documents and instruments relating to
such principal balance) has been transferred to The Prudential Insurance Company
of America).  The Remainder Notes and all other documents listed on Exhibit A
                                                                    ---------
attached hereto to the extent they relate to the Remainder Notes shall sometimes
hereinafter be collectively referred to as the "INVESTMENT LOAN DOCUMENTS".

          Assignee hereby accepts the foregoing assignment and agrees to assume,
pay, perform and discharge, as and when due, all of the agreements, obligations
and liabilities of Assignor under or arising from or out of the Remainder Notes
and the Investment Loan Documents (but only to the extent relating to the
Remainder Notes) to be paid, performed or discharged on and after the date
hereof and agrees to be bound by all of the terms and conditions of the
Investment Loan Documents to be performed on and after the date hereof (but only
to the extent relating to the Remainder Notes) (all such items, collectively,
the "POST-CLOSING OBLIGATIONS").

                                      D-1

 
          This Assignment shall be binding upon and inure to the benefit of
Assignor and Assignee, and their respective successors and assigns.

                         "ASSIGNOR"

                         THREE EMBARCADERO CENTER VENTURE, a
                         California General Partnership

                         By:  BOSTON PROPERTIES LLC,
                              a Delaware limited liability company,
                              as Managing General Partner

                              By:   BOSTON PROPERTIES LIMITED
                                    PARTNERSHIP, a Delaware limited
                                    partnership, as Manager

                                    By:  BOSTON PROPERTIES, INC.,
                                         a Delaware corporation,
                                         as General Partner



                                         By:_______________________
                                         Name:_____________________
                                         Title:____________________


                              "ASSIGNEE"

                              [INSERT ASSIGNEE SIGNATURE BLOCK]

                                      D-2

 
                              JOINDER AND RELEASE
                              -------------------

          The undersigned, as maker of the Remainder Notes, hereby agrees to
release the Assignor from all Post-Closing Obligations and shall look only to
Assignee for satisfaction of the same.

                              PRUDENTIAL REALTY SECURITIES, INC.,
                              a Delaware corporation



                              By: _________________________________
                              Name: _______________________________
                              Title: ______________________________

                                      D-3

 
                                                                   EXHIBIT 99.22
 
                           OPTION AND PUT AGREEMENT


          THIS OPTION AND PUT AGREEMENT (this "AGREEMENT") is entered into as of
November 12, 1998, by and between FOUR EMBARCADERO CENTER VENTURE, a California
general partnership ("OPTIONOR"), and THE PRUDENTIAL INSURANCE COMPANY OF
AMERICA, a New Jersey corporation ("PRUDENTIAL" and together with any permitted
assignee or designee hereunder hereinafter sometimes referred to as "OPTIONEE").

                                   RECITALS
                                   --------

          A.   Optionor is the "holder" of and "payee" under those certain
Senior Notes of even date herewith, executed and delivered by Prudential Realty
Securities, Inc., a Delaware corporation ("INVESTMENT LOAN BORROWER"), in the
aggregate principal amount of One Hundred Forty-Three Million One Hundred
Nineteen Thousand and No/100 Dollars ($143,119,000.00) (the "INVESTMENT LOAN"),
copies of which notes are attached hereto as Exhibit A (the "INVESTMENT NOTES").
                                             ---------           
The Investment Notes were made pursuant to the Note Purchase Agreement of even
date herewith, by and between Optionor and Investment Loan Borrower (the
"INVESTMENT LOAN NOTE PURCHASE AGREEMENT").

          B.   Pursuant to that certain Redemption Agreement of even date
herewith, by and among Optionor, Prudential, Boston Properties LLC and BP EC4
Holdings LLC (the "REDEMPTION AGREEMENT"), the Investment Notes (or certain of
the Investment Notes or portions thereof as provided in accordance with the
terms and provisions of the Redemption Agreement) may be distributed (together
with cash, if necessary pursuant to the Redemption Agreement) to Prudential in
full redemption of its partnership interest in Optionor.  The date on which such
Investment Notes (or portions thereof) are distributed to Prudential and
Prudential's partnership interest in the Optionor is fully redeemed (such that
Prudential is no longer a partner or constituent of Optionor) pursuant to the
Redemption Agreement shall be referred to in this Agreement as the "REDEMPTION
DATE".

          C.   Pursuant to certain terms, provisions and conditions of the
Redemption Agreement, less than the entire principal face amount of all
Investment Notes may be distributed to Prudential on the Redemption Date.  In
such event, the Optionor may retain, as payee, a portion of the aggregate
principal amount of all Investment Notes (the "REMAINDER") after the Redemption
Date, which Remainder will be evidenced by one or more of the Investment Notes
that are retained by Optionor pursuant to the Redemption Agreement and, if
applicable pursuant to the terms and provisions of the Redemption Agreement and
the Investment Loan Note Purchase Agreement, a new promissory note issued by the
Investment Loan Borrower in accordance with Section 2 of the Redemption
Agreement, all of which notes shall have an aggregate principal amount equal to
the Remainder (collectively, the "REMAINDER NOTES").  All documents and
instruments evidencing, securing or relating to the Investment Notes or
Remainder Notes (including, without limitation,

                                       1

 
the Investment Loan Note Purchase Agreement) shall be herein referred to as the
"INVESTMENT LOAN DOCUMENTS".

          D.   Optionee desires to acquire an option to purchase and acquire
Optionor's entire interest in, to and under any such Remainder Notes and
Optionor is willing to grant such option, and Optionor desires to acquire a put
right to cause Optionee to purchase and acquire Optionor's entire interest in,
to and under any such Remainder Notes and Optionee is willing to grant such put
right to Optionor, all upon the terms and conditions hereinafter set forth.

                                   AGREEMENT
                                   ---------

          NOW, THEREFORE, in consideration of the benefits accruing to the
parties hereto, and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged by Optionor and Optionee, Optionor
and Optionee hereby agree as follows:

          1.   OPTION.
               ------ 

          (A) Grant of Option.  Optionor hereby unconditionally and irrevocably
              ---------------                                                  
grants, conveys, transfers and assigns to Optionee (or its designee) the
exclusive option and right to, subject to the terms and provisions of this
Agreement, acquire Optionor's entire right, title and interest in, to and under
all Remainder Notes in accordance with and subject to the terms and conditions
of this Agreement; provided that, Optionee shall assume all of Optionor's
                   -------- ----                                         
duties, obligations and liabilities arising under the Remainder Notes and the
Investment Loan Documents (but only to the extent the same relate to the
Remainder Notes) accruing from and after the Closing Date (the "OPTION").

          (B) Term and Exercise of Option.  Optionee may exercise the Option at
              ---------------------------                                      
any time from and after the Redemption Date and on or before 6:00 p.m pacific
coast time on the earlier of (x) the date which is one hundred and sixty-five
(165) days after the Redemption Date and (y) August 31, 2002 (the "OPTION
ELECTION PERIOD") by giving Optionor no less than ten (10) business days'
written notice of exercise (the "OPTION ELECTION NOTICE"); provided that,
                                                           -------- ---- 
notwithstanding the foregoing, Optionee's right to give an Option Election
Notice and to purchase the Remainder Notes pursuant to its option shall be
suspended during any period of time while there exists an "Investment Loan
Borrower Credit Event" (as defined in Exhibit B attached hereto).  The Option
                                      ---------                              
Election Notice shall include (i) the proposed closing date, which shall not be
less than ten (10) business days after the delivery thereof nor more than twenty
(20) business days after the delivery thereof, and (ii) the Optionee's
calculation of the Fair Market Value (as defined in Section 3 below) of the
                                                    ---------              
Remainder Notes based on the proposed closing date.  In the event that the
Option is not exercised on or before the expiration of the Option Election
Period, or the transaction has not closed within twenty (20) business days after
the expiration of the Option Election Period for any reason other than the
default of the Optionor, then the Option shall become null and void and of no
further force or effect, and the parties hereto shall be released from all
further liabilities and obligations hereunder with respect to the Option (except
as otherwise expressly provided herein).

                                       2

 
          (C) Option Fee.  No later than three (3) calendar days after the
              ----------                                                  
execution of this Agreement by Optionor and Optionee, Optionee shall pay to
Optionor the sum of One Hundred Dollars ($100) (the "OPTION FEE").  The Option
Fee is non-refundable (except as otherwise expressly provided in this
Agreement); provided that, the Option Fee shall be credited against the Purchase
            -------- ----                                                       
Price (as defined in Section 3 below) payable at Closing (as defined in Section
                     ---------                                          -------
4(a) below).
- ----        

          2.   PUT.
               --- 

          (A) Grant of Put.  Optionee hereby unconditionally and irrevocably
              ------------                                                  
grants, conveys, transfers and assigns to Optionor the exclusive right to,
subject to the terms and provisions of this Agreement, put and sell to Optionee
Optionor's entire right, title and interest in, to and under all Remainder Notes
in accordance with and subject to the terms and conditions of this Agreement
(the "PUT").  Optionee shall be obligated to acquire such Remainder Notes upon
the exercise of Optionor's Put and to assume all of Optionor's duties,
obligations and liabilities arising under the Remainder Notes and the Investment
Loan Documents (but only to the extent the same relate to the Remainder Notes)
accruing from and after the Closing Date.  In the event that Optionor exercises
its Put, the Option Fee shall be credited against the Purchase Price payable at
Closing.

          (B) Term and Exercise of Put.  Optionor may exercise the Put at any
              ------------------------                                       
time during the Put Period (defined immediately below) by giving Optionee no
less than ten (10) business days' written notice of exercise (the "PUT ELECTION
NOTICE") at any time prior to the expiration of the Put Period; provided that,
                                                                -------- ---- 
notwithstanding the foregoing, Optionor's right to give a Put Election Notice
and to put the Remainder Notes to Optionee pursuant to this Agreement shall be
suspended during any period of time while the Remainder Notes have been
accelerated and such acceleration has not been rescinded by the holders of the
Remainder Notes.  The Put Election Notice shall include (i) the proposed closing
date, which shall not be less than ten (10) business days after the delivery
thereof nor more than twenty (20) business days after the delivery thereof, and
(ii) the Optionor's calculation of the Fair Market Value of the Remainder Notes
based on the proposed closing date.  In the event that the Put is not exercised
prior to the expiration of the Put Period, and the transaction has not closed on
or before the date which is twenty (20) business days after the expiration of
the Put Period for any reason other than the default of the Optionee, then the
Put shall become null and void and of no further force or effect, and the
parties hereto shall be released from all further liabilities and obligations
hereunder with respect to the Put (except as otherwise expressly provided
herein).  As used herein, the "PUT PERIOD" shall mean the period of time
commencing on the thirty-first (31st) day after the expiration of the Option
Election Period and expiring at 6:00 p.m. pacific coast time on the thirtieth
(30th) day thereafter.

          3.   PURCHASE PRICE.  The total purchase price ("PURCHASE PRICE")
               --------------                                              
which Optionee shall pay to Optionor for the Remainder Notes upon the exercise
of the Option or Put shall be the Fair Market Value of such Remainder Notes on
the date of Closing.  At Closing, Optionee shall pay to Optionor the entire
balance of the Purchase Price, over and above the Option

                                       3

 
Fee previously paid to Optionor and credited to the Purchase Price in accordance
with the terms and provisions of Sections 1(c) and 2(a) above (provided that the
                                 -------------     ----
parties acknowledge and agree that no interest or other income earned by
Optionor on the Option Fee shall be credited against the Purchase Price), by
wire transfer of immediately available funds. The "FAIR MARKET VALUE" of the
Remainder Notes shall be calculated and determined as of the Closing Date as
provided in Exhibit B attached hereto.
            ---------                 

          4.   CLOSING.
               ------- 

          (A) Closing.  Upon exercise of the Option or Put as provided in (and
              -------                                                         
in accordance with) any of Sections 1 or 2 above, the purchase and sale of the
                           ----------    -                                    
Remainder Notes shall close on the closing date specified in the Option Election
Notice or Put Election Notice, as applicable, in accordance with the terms of
Sections 1(b) and 2(b), respectively (the "CLOSING DATE").  As used herein, the
- -------------     ----                                                         
term "CLOSING" means the date and time that the Purchase Price due under Section
                                                                         -------
3 above is paid to Optionor for the Remainder Notes, and the Remainder Notes are
- -                                                                               
endorsed to the order of Optionee and all other documents and instruments of
transfer and assumption are executed and delivered by the parties in accordance
with the terms and provisions of subsection (b) below.
                                 --------------       

          (B)  Closing Procedure.  The sale of the Remainder Notes shall be
               -----------------                                           
consummated on the Closing Date as follows:

               (I)   On or before the Closing Date, Optionor shall execute and
     deliver to Optionee (A) an Allonge to each Remainder Note in the form of
     Exhibit C attached hereto (the "ALLONGE"); (B) counterpart originals of an
     ---------                                                                 
     Assignment and Assumption of Loan in the form of Exhibit D attached hereto
                                                      ---------                
     (the "ASSIGNMENT"), executed by Optionor; and (C) the original Remainder
     Notes and originals or copies of all other Investment Loan Documents in
     Optionor's possession or within its control.

               (II)  On or before the Closing Date, Optionee shall deliver to
     Optionor, (A) in immediately available funds the Purchase Price (less the
     Option Fee) and such additional amounts as may be required to satisfy
     Optionee's share of any Closing costs; and (B) counterpart originals of the
     Assignment, executed by Optionee.

               (III) All reasonable Closing and escrow fees and costs incurred
     in connection with the transactions described in this Agreement shall be
     paid fifty percent (50%) by Optionor and fifty percent (50%) by Optionee;
     provided that, each party hereto shall bear the expense of its own counsel.
     -------- ----                                                              

          5.   OPTIONOR'S REPRESENTATIONS AND WARRANTIES.  Optionor hereby
               -----------------------------------------                  
represents and warrants to Optionee as of the date hereof and as of the Closing
Date as follows:

                                       4

 
          (A) Subject to the rights of Prudential under the Redemption
Agreement, Optionor is the sole owner of the Investment Notes on the date
hereof, and on the Closing Date, Optionor shall be the sole owner of the
Remainder Notes.  Further, the Investment Notes are free and clear of all liens
and third party interests on the date hereof (other than the interests and
rights in favor of Prudential under the Redemption Agreement and any pledge of
the Investment Notes securing the Equity Redemption Loan (as defined in the
Redemption Agreement)), and on the Closing Date, the Remainder Notes shall be
free and clear of all liens and third party interests of any kind or nature,
except as created by this Agreement.  Optionor has not amended, modified,
terminated or otherwise by written agreement altered the Investment Notes or
other Investment Loan Documents except as specifically disclosed to Optionee in
writing prior to the date hereof, and on the Closing Date, except as otherwise
amended, modified or altered in connection with the transactions contemplated in
the Redemption Agreement, Optionor shall not have amended, modified, terminated
or otherwise altered the Investment Notes, Remainder Notes or other Investment
Loan Documents without Optionee's written consent obtained in accordance with
Section 7 hereof.
- ---------        

          (B) As of the date hereof, Optionor has not assigned or transferred
the Investment Notes or any of the other Investment Loan Documents (except for
any pledge of the Investment Notes securing the Equity Redemption Loan), nor are
there any agreements to assign or convey any portion of such Investment Loan
Documents to any person other than Optionee and Prudential in accordance with
this Agreement and the Redemption Agreement, respectively.  On the Closing Date,
Optionor shall not have assigned or transferred the Remainder Notes or any of
the other Investment Loan Documents (except for such portion of the Investment
Notes transferred to Prudential in accordance with the Redemption Agreement),
nor shall there be any agreements to assign or convey the Remainder Notes or any
portion of such Investment Loan Documents to any person other than Optionee
(except with respect to Prudential's rights under the Redemption Agreement).

          (C) To Optionor's knowledge, Optionor has all requisite power and
authority to execute and deliver, and to perform all of its obligations under,
this Agreement and all instruments and other documents to be executed and
delivered to Optionee in connection with the transactions described herein.

          (D) To Optionor's knowledge, Optionor is a duly formed general
partnership under the laws of the State of California, and this Agreement, and
all the instruments and documents to be executed and delivered by Optionor in
connection herewith, are legal, valid and binding obligations of Optionor
enforceable against it in accordance with their respective terms, except to the
extent that enforcement may be limited by applicable bankruptcy, insolvency,
moratorium and other principles relating to or limiting the rights of
contracting parties generally.

          (E)  To Optionor's knowledge, the execution of this Agreement and the
performance of Optionor's obligations hereunder will not conflict with or result
in a breach of any statute, rule, regulation, judgment, decree or order of any
court, board, committee or governmental agency to

                                       5

 
which Optionor is subject, nor violate any agreement or contract to which
Optionor is a party or by which Optionor is bound. To Optionor's knowledge, no
consent, approval, authorization or order of any court or governmental agency or
body is required for the execution, delivery and performance by Optionor of, or
compliance by Optionor with, this Agreement or the consummation of the
transactions contemplated by it, except for such consents, approvals,
authorizations or orders, if any, that have been obtained.

Each of the foregoing representations and warranties shall survive the Closing
for a period of twelve (12) months immediately thereafter.

          6.   OPTIONEE'S REPRESENTATIONS, WARRANTIES AND ACKNOWLEDGMENTS.
               ---------------------------------------------------------- 
Optionee hereby represents, warrants and acknowledges to Optionor as of the date
hereof and as of the Closing Date as follows:

          (A) Optionee is a corporation duly organized, validly existing and in
good standing under the laws of the State of New Jersey.  Optionee has all
requisite power and authority to execute and deliver, and to perform all of its
obligations under, this Agreement and all instruments and other documents
executed and delivered by Optionee in connection with the transactions
contemplated herein.  This Agreement, and all the instruments and documents to
be executed and delivered by Optionee in connection herewith, are legal, valid
and binding obligations of Optionee enforceable against it in accordance with
their respective terms, except to the extent that enforcement may be limited by
applicable bankruptcy, insolvency, moratorium and other principles relating to
or limiting the rights of contracting parties generally.

          (B) The execution, delivery and performance of this Agreement has been
duly authorized by all necessary action on the part of Optionee and does not
require any consent or approval of any party that has not been obtained.

          (C)  The execution of this Agreement and the performance of Optionee's
obligations hereunder will not conflict with or result in a breach of any
statute, rule, regulation, judgment, decree or order of any court, board,
committee or governmental agency to which Optionee is subject, nor violate any
agreement or contract to which Optionee is a party or by which Optionee is
bound.  No consent, approval, authorization or order of any court or
governmental agency or body is required for the execution, delivery and
performance by Optionee of, or compliance by Optionee with, this Agreement or
the consummation of the transactions contemplated by it, except for such
consents, approvals, authorizations or orders, if any, that have been obtained.

          (D) Optionee has made, and will make, prior to the Closing, such
examination, review and investigation of the facts and circumstances as
necessary to evaluate the Remainder Notes.  Optionee further acknowledges that
in acquiring the Remainder Notes, Optionee is assuming the risk of full or
partial loss which is inherent with the credit, collateral and collectibility
risks associated with the quality and character of the loan evidenced by the
Remainder Notes.

                                       6

 
          (E)  Optionee is an "accredited investor" as defined in Regulation D
under the Securities Act of 1933, as amended.  The Remainder Notes will be
acquired by Optionee for its own account for investment only and not with a view
to, or with any intention of, a distribution or resale thereof, in whole or in
part.

          (F)  Optionee has not relied upon any representations, warranties or
statements of any kind made by, or on behalf of, Optionor, except as
specifically set forth in this Agreement. Optionee acknowledges that, except for
the express representations and warranties by Optionor set forth in, or to be
made in instruments delivered pursuant to, this Agreement, Optionor negates and
disclaims all representations, warranties and statements of every kind or type
(express or implied) and, except for the Optionor's representations and
warranties set forth herein, the Remainder Notes are being acquired "as is" with
no recourse to Optionor for any default thereunder or diminution in value with
respect thereto.

Each of the foregoing representations and warranties shall survive the Closing
for a period of twelve (12) months immediately thereafter.

          7.   COVENANTS.  Optionor hereby covenants and agrees that, from and
               ---------                                                      
after the date hereof, except as otherwise contemplated in and permitted by the
Redemption Agreement, Optionor will not, without Optionee's prior written
consent, (a) amend, modify, cancel or terminate, any of the Investment Notes,
Remainder Notes or Investment Loan Documents in any manner which will adversely
affect or impact the interest of the "payee" under the Remainder Notes and
Investment Loan Documents if and when such Remainder Notes are transferred to
Optionee, (b) waive, relinquish or allow to lapse any right of Optionor as
"lender/payee" under the Investment Notes, Remainder Notes or Investment Loan
Documents which will in any manner adversely affect or impact the interest of
the "payee" under the Remainder Notes and other Investment Loan Documents if and
when such Remainder Notes are transferred to Optionee, or (c) agree or consent
to any agreements or understandings that will impact the Remainder Notes if and
when such Remainder Notes are transferred to Optionee.  In furtherance of the
foregoing, except for the transfer of Investment Notes to Prudential pursuant to
the Redemption Agreement and any pledge of the Investment Notes to secure the
Equity Redemption Loan, Optionor shall not sell, assign or otherwise transfer
any of the Investment Notes or Remainder Notes prior to the expiration of the
Option Election Period; provided that, (i) Optionor shall be permitted to
                        -------- ----                                    
transfer any Remainder Notes after the "Redemption Distribution" under the
Redemption Agreement subject to this Agreement, and (ii) all restrictions on the
transferability of the Investment Notes and Remainder Notes shall cease upon the
expiration of the Option Election Period and Optionor shall thereafter be
permitted to freely transfer the Investment Notes and/or Remainder Notes without
restriction.  Upon written request by either party at or prior to the Closing,
the other party shall give to the requesting party written notice of any newly
discovered information that causes any of the representations or warranties of
such responding party made in this Agreement to be materially untrue or
incorrect, or of the occurrence of any event or circumstance that would
materially modify or affect the substance of such representations and
warranties.

                                       7

 
          8.   CONFIDENTIALITY; PRESS RELEASES.  Each party hereto hereby agrees
               -------------------------------                                  
that, except as required by law or the regulations of an exchange on which
securities of such party are listed or unless compelled by an order of a court,
and except for such disclosures to each party's lenders, consultants, attorneys,
prospective investors, agents, assignees, partners, officers, directors,
employees and advisors as may be necessary or advisable in connection with the
consummation of the transactions contemplated herein (provided each such person
is instructed to comply with the terms of this confidentiality provision), it
shall keep the contents of this Agreement and the transactions contemplated
hereby confidential and further agrees to refrain from generating or
participating in any publicity statement, press release, or other public notice
regarding this Agreement or the transactions contemplated hereby, without the
prior written consent of the other party, which consent shall not be
unreasonably withheld.  The terms and provisions of this Section 8 shall survive
                                                         ---------              
the Closing or any termination of this Agreement and shall not be merged into
any instrument or conveyance delivered at the Closing.

          9.   COMMISSIONS.  Optionor and Optionee each agrees to indemnify,
               -----------                                                  
defend, protect and hold the other harmless from and against any and all
commissions, finder's and/or similar fees or compensation claimed by any broker
or finder in connection with Optionee's purchase of the Remainder Notes based on
claimed contacts with, or other acts or omissions of, such indemnifying party.
The terms and provisions of this Section 9 shall survive the Closing or
                                 ---------                             
termination of this Agreement.

          10.  REMEDIES.  In the event of any material breach by either party to
               --------                                                         
this Agreement, the remedy at law in favor of the other party may be inadequate
and such other party, in addition to all other rights and remedies which may be
available to it at law or in equity, shall have the right of specific
performance in the event of any material breach, or injunction in the event of
an anticipatory material breach, of this Agreement by the other party.
Furthermore, upon the material breach of this Agreement by any party, the other
party shall have the right to terminate this Agreement and to recover its
damages, and, upon a material breach by Optionor, Optionee shall also have the
right to receive a refund of the Option Fee.  Such refund of the Option Fee
shall be in addition to, and not in lieu of, any other remedies which Optionee
may have against Optionor at law or in equity arising from Optionor's breach.

          11.  INDEMNIFICATION.  Optionor hereby agrees to indemnify, protect,
               ---------------                                                
defend, save and hold harmless Optionee, and Optionee's trustees, officers,
directors, shareholders, beneficiaries, members, partners, agents, employees,
investment advisors and independent contractors from and against any and all
duties, obligations, liabilities, suits, claims, demands, causes of action,
costs and expenses (including, without limitation, reasonable attorneys' fees
and costs), arising out of a breach by the Optionor of any of its
representations and warranties made in Section 5.  Optionee hereby agrees to
                                       ---------                            
indemnify, protect, defend, save and hold harmless Optionor, and Optionor's
trustees, officers, directors, shareholders, beneficiaries, members, partners,
agents, employees, investment advisors and independent contractors from and
against any and all duties, obligations, liabilities, suits, claims, demands,
causes of action, costs and expenses (including, without limitation, reasonable
attorneys' fees and costs), arising out of a

                                       8

 
breach by the Optionee of any of its representations and warranties made in
Section 6. The terms and provisions of this Section 11 shall survive the 
- ---------                                   ----------
Closing or the termination of this Agreement for a period of twelve (12) months
immediately thereafter.

          12.  ESCROW INSTRUCTIONS.  Upon the request of either Optionor or
               -------------------                                         
Optionee, the parties hereto shall execute and deliver any and all escrow
documents reasonably approved by such party and perform any and all acts
reasonably necessary or appropriate to open and enter into an escrow in order to
consummate the transactions contemplated herein.  Such agreements may include,
without limitation, customary escrow instructions (including, without
limitation, standard general terms and conditions to the extent the appointed
escrow agent demands such provisions in order to serve as escrow agent), as may
be reasonably necessary or desirable in order to enable the escrow agent to
comply with the terms of this Agreement.  The escrow agent shall be selected by
the party making the request for an escrow (and shall not be affiliated with
such party), but shall be subject to the written approval of the other party,
which approval shall not be unreasonably withheld or delayed.  The parties shall
share equally the costs and expenses of the escrow and escrow agent.

          13.  MISCELLANEOUS.
               ------------- 

          (A)  Authority.  Each individual and entity executing this Agreement
               ---------                                                      
represents and warrants that he, she or it has the capacity set forth on the
signature pages hereof with full power and authority to bind the party on whose
behalf he, she or it is executing this Agreement to the terms hereof.

          (B)  Further Assurances.  Optionor and Optionee shall each execute and
               ------------------                                               
deliver to the other such further documents and instruments as may be reasonably
requested by either of them in order to effectuate the intent of this Agreement
and to obtain the full benefit of this Agreement.  Any request by either party
under this Section 13(b) shall be accompanied by the document proposed for
           -------------                                                  
signature by the party requesting it, in form and substance satisfactory to the
party of whom the request is made and its attorneys.  The party making the
request shall bear and discharge any fees or expenses incident to the
preparation, filing or recording of the document requested pursuant to this
Section 13(b).
- ------------- 

          (C)  Time of the Essence.  Time is of the essence in the performance 
               ------------------- 
of and compliance with each of the provisions of this Agreement.

          (D)  Governing Law.  This Agreement shall be governed by and
               -------------                                          
interpreted in accordance with the laws of the State of California, without
reference to California's conflicts or choice of law principles.

          (E)  Entire Agreement.  THIS AGREEMENT, THE MASTER TRANSACTION
               ----------------                                         
AGREEMENT DATED AS OF SEPTEMBER 28, 1998, BY AND AMONG PRUDENTIAL, PIC, CERTAIN
PERSONS LISTED ON EXHIBIT A THERETO, FEDMARK CORPORATION, 

                                       9

 
EMBARCADERO CENTER INVESTORS PARTNERSHIP, PACIFIC PROPERTY SERVICES, L.P.,
BOSTON PROPERTIES LIMITED PARTNERSHIP AND BOSTON PROPERTIES, INC. AND ALL
TRANSACTION DOCUMENTS DESCRIBED THEREIN (COLLECTIVELY, THE "TRANSACTION
DOCUMENTS") REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE
CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENT
OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES. The
parties make no representations or warranties to each other, except as
specifically contained in this Agreement or in the accompanying exhibits or the
certificates or other closing documents delivered according to this Agreement or
in the other Transaction Documents. All prior agreements and understanding
between the parties hereto with respect to the transactions contemplated hereby,
whether verbal or in writing, are superseded by, and are deemed to have been
merged into, this Agreement and all other Transaction Documents. Any waiver,
modification, consent or acquiescence with respect to any provision of this
Agreement shall be set forth in writing and duly executed by or in behalf of the
party to be bound thereby. No waiver by any party of any breach hereunder shall
be deemed a waiver of any other or subsequent breach.

          (F) Modifications.  This Agreement may not be changed, waived,
              -------------                                             
discharged or terminated orally, but only by an instrument in writing signed by
the party against which enforcement of such change, waiver, discharge or
termination is sought.

          (G) Severability.  If any provision of this Agreement shall be
              ------------                                              
determined to be invalid, illegal or unenforceable, the balance of this
Agreement shall remain in full force and effect and if any provision is
inapplicable to any person or circumstance, it shall nevertheless remain
applicable to all other persons and circumstances.

          (H) Assignee; Designee.  Optionee may assign this Agreement or
              ------------------                                        
designate a designee to acquire Optionor's entire right, title and interest in
and to the Remainder Notes at any time prior to the Closing; provided that, in
                                                             -------- ----    
no event shall Prudential be released from any of the obligations or liabilities
of the "Optionee" hereunder without the prior written consent of Optionor.  This
Agreement may not otherwise be assigned, nor may any interest herein be
assigned, by Optionee without Optionor's prior written consent.

          (I) Notices.  All notices, elections, consents, approvals, demands,
              -------                                                        
objections, requests or other communications which any party hereto may be
required or desire to give to the other party hereto must be in writing and sent
by (i) first class U.S. certified or registered mail, return receipt requested,
with postage prepaid, (ii) telecopy or facsimile (with a copy sent by first
class U.S. certified or registered mail, return receipt requested, with postage
prepaid), or (iii) express mail or a nationally recognized courier (for next
business day delivery).  A notice or other communication sent in compliance with
the provisions of this Section 13(i) shall be deemed given and received on (a)
                       -------------                                          
the third (3rd) day following the date it is deposited in the U.S. mail, (b) the
date of confirmed dispatch if sent by facsimile or telecopy (provided that a
copy thereof is sent by

                                       10

 
mail in the manner provided in clause (i) above), or (c) the date it is 
                               ----------               
delivered to the other party if sent by express mail or courier. The addresses
for the parties are as follows:

          All notices and other communications to Optionor shall be given to it
at:

          c/o Boston Properties, Inc.
          8 Arlington Street
          Boston, Massachusetts 02116-3495
          Attention:  General Counsel
          Facsimile No.:  (617) 421-1555

          with a copy to:

          Goulston & Storrs, P.C.
          400 Atlantic Avenue
          Boston, Massachusetts 02110-3333
          Attention:  Eli Rubenstein, Esq.
          Facsimile No.:  (617) 574-4112

          All notices and other communications to Optionee shall be given to it
at:

          The Prudential Insurance Company of America
          Prudential Realty Group
          8 Campus Drive, 4th Floor
          Arbor Circle South
          Parsippany, New Jersey 07054
          Attention:  John R. Triece
          Facsimile No.:  (201) 734-1472

          with a copy to:

          The Prudential Insurance Company of America
          Prudential Capital Group
          Four Embarcadero Center
          Suite 2700
          San Francisco, California 94111
          Attention:  Harry N. Mixon, Esq.
          Facsimile No.:  (415) 956-2197

          and a copy to:

          O'Melveny & Myers LLP
          Embarcadero Center West

                                       11

 
          275 Battery Street
          Suite 2600
          San Francisco, California 94111
          Attention:   Stephen A. Cowan, Esq.
          Facsimile No.:   (415) 984-8701

Any party may designate another addressee or change its address for notices and
other communications hereunder by a notice given to the other parties in the
manner provided in this Section 13(i).
                        ------------- 

          (J) Attorneys' Fees.  If any action is brought by either party against
              ---------------                                                   
the other party relating to or arising out of this Agreement, the transactions
described herein or the enforcement hereof, the prevailing party shall be
entitled to recover from the other party reasonable attorneys' fees and costs
incurred in connection with the prosecution or defense of such action.  For
purposes of this Agreement, the term "ATTORNEYS' FEES" or "ATTORNEYS' FEES AND
COSTS" shall mean the fees and expenses of counsel to the parties hereto, which
may include printing, photostating, duplicating and other expenses, air freight
charges, and fees billed for law clerks, paralegals and other persons not
admitted to the bar but performing services under the supervision of an
attorney, and the costs and fees incurred in connection with the enforcement or
collection of any judgment obtained in any such proceeding.

          (K) Counterparts.  This Agreement may be executed in one or more
              ------------                                                
counterparts, each of which shall constitute an original, but all of which, when
taken together, shall constitute only one instrument.  The signature page of any
counterpart may be detached therefrom without impairing the legal effect of the
signature(s) thereon provided such signature page is attached to any other
counterpart identical thereto except having additional signature pages executed
by other parties to this Agreement attached thereto.

          (L) Successors and Assigns.  This Agreement shall be binding upon and
              ----------------------                                           
inure to the benefit of each of the parties hereto and to their respective
permitted transferees, successors and assigns.

          (M) Exhibits.  All Exhibits attached hereto are hereby incorporated
              --------                                                       
herein.

          (N) No Third Party Beneficiaries.  Persons who are not parties to this
              ----------------------------                                      
Agreement shall have no rights or privileges (whether as a third party
beneficiary or otherwise) under or by virtue of this Agreement.

          (O) Business Days.  In the event that any of the dates specified in
              -------------                                                  
this Agreement shall fall on a Saturday, Sunday, or a holiday recognized by the
State of California or the Commonwealth of Massachusetts, then the date of such
action shall be deemed to be extended to the next business day.

                                       12

 
          (P) Consent to Jurisdiction and Service of Process.  ALL JUDICIAL
              ----------------------------------------------               
PROCEEDINGS BROUGHT AGAINST ANY PERSON ARISING OUT OF OR RELATING TO THIS
AGREEMENT MAY BE BROUGHT IN ANY STATE OR FEDERAL COURT OF COMPETENT JURISDICTION
IN THE STATE OF CALIFORNIA, AND BY EXECUTION AND DELIVERY OF THIS AGREEMENT EACH
PARTY HERETO ACCEPTS FOR ITSELF, GENERALLY AND UNCONDITIONALLY, THE NONEXCLUSIVE
JURISDICTION OF THE AFORESAID COURTS AND WAIVES ANY DEFENSE OF FORUM NON
CONVENIENS AND IRREVOCABLY AGREES TO BE BOUND BY ANY JUDGMENT RENDERED THEREBY
IN CONNECTION WITH THIS AGREEMENT.  Each party hereby agrees that service of all
process in any such proceeding in any such court may be made by registered or
certified mail, return receipt requested, to any other party hereto, at its
address provided in this Agreement, such service being hereby acknowledged by
each party to be sufficient for personal jurisdiction in any action against such
party in any such court and to be otherwise effective and binding service in
every respect.  Nothing herein shall affect the right to serve process in any
other manner permitted by law.

          (Q) Waiver of Jury Trial.  EACH OF THE PARTIES TO THIS AGREEMENT
              --------------------                                        
HEREBY AGREES TO WAIVE ITS RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR
CAUSE OF ACTION BASED UPON OR ARISING OUT OF THIS AGREEMENT OR ANY DEALINGS
RELATING TO THE SUBJECT MATTER OF THIS AGREEMENT. The scope of this waiver is
intended to be all-encompassing of any and all disputes that may be filed in any
court and that relate to the subject matter of this transaction, including,
without limitation, contract claims, tort claims, breach of duty claims and all
common law and statutory rights.  Each party hereto acknowledges that this
waiver is a material inducement to enter into a business relationship, that each
has already relied on this waiver in entering into this Agreement, and that each
shall continue to rely on this waiver in their related future dealings.  Each
party hereto further warrants and represents that it has reviewed this waiver
with its legal counsel and that it knowingly and voluntarily waives its jury
trial rights following consultation with such legal counsel.  THIS WAIVER IS
IRREVOCABLE, MEANING THAT IT MAY NOT BE MODIFIED EITHER ORALLY OR IN WRITING,
AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS
OR MODIFICATIONS OF THIS AGREEMENT.  In the event of litigation, this Agreement
may be filed as a written consent to a trial by the court.


                           [SIGNATURES ON NEXT PAGE]

                                       13

 
   IN WITNESS WHEREOF, the undersigned have duly executed this Agreement as of
the date first above written.

                              "OPTIONOR"

                              FOUR EMBARCADERO CENTER VENTURE,             
                              a California General Partnership

                              By:   BOSTON PROPERTIES LLC,
                                    a Delaware limited liability company,
                                    as Managing General Partner

                                    By:  BOSTON PROPERTIES LIMITED
                                         PARTNERSHIP, a Delaware limited
                                         partnership, as Manager

                                         By:  BOSTON PROPERTIES,
                                              INC., a Delaware corporation,
                                              General Partner


                                              By: /s/ Thomas J. O'Connor
                                                 ---------------------------
                                              Name: Thomas J. O'Connor
                                                   -------------------------
                                              Title: Vice President
                                                    ------------------------


                              "OPTIONEE"

                              THE PRUDENTIAL INSURANCE COMPANY OF
                              AMERICA, a New Jersey corporation



                              By: /s/ Gary L. Frazier
                                 ---------------------------------
                              Name: ______________________________
                              Title: _____________________________

                                      S-1

 
                                    JOINDER

          The undersigned, as maker of the Remainder Notes, agrees that on the
Closing Date, at the request of Optionor, it will execute the Joinder and
Release on the Assignment and Assumption of Loan in the form attached hereto as
Exhibit D, which will be executed at such Closing.
- ---------                                         


                              PRUDENTIAL REALTY SECURITIES, INC.,
                              a Delaware corporation



                              By: /s/ Paul D. Egan
                                 ------------------------------------
                              Name: Paul D. Egan
                                   ----------------------------------
                              Title: Vice President
                                    ---------------------------------

                                      S-2

 
                                   EXHIBIT A

                               INVESTMENT NOTES
                               ----------------

                                      A-1

 
                                   EXHIBIT B

                                CALCULATION OF
                               FAIR MARKET VALUE
                               -----------------


     The Fair Market Value of the Remainder Notes shall equal the aggregate
Remaining Cash Flow for all Remainder Notes discounted from each respective
scheduled payment due date to the Closing Date at a discount factor equal to the
Discount Rate for each such Remainder Note. Notwithstanding the foregoing, if on
the Determination Date an Investment Loan Borrower Credit Event exists, then
Optionor shall appoint an investment banking firm of national recognition (which
will be satisfactory to Optionee in its reasonable discretion) to determine the
change in the Fair Market Value of the Remainder Notes for purposes of this
Agreement.  In the event that an investment banking firm is appointed to
determine the change in the Fair Market Value of any Remainder Note as of the
Determination Date pursuant to the preceding sentence, such investment banking
firm shall be instructed to determine the change in the Fair Market Value of
such Remainder Note based on the following four factors: (i) changes in market
interest rates since the date of funding of the Remainder Note, (ii) the time
period remaining from the Determination Date until the earlier of the next Rate
Reset Date of such Remainder Note and the maturity of the Remainder Note, (iii)
the Remaining Cash Flow (as defined below) of the Remainder Note, and (iv)
changes in the credit quality of the Remainder Note since the date of funding
thereof.  The parties agree that an acceptable investment banking firm would be
Goldman Sachs or Merrill Lynch.  As used herein, the term "INVESTMENT LOAN
BORROWER CREDIT EVENT" shall mean any of the following events: (x) the credit
rating of the Remainder Notes has been downgraded from the credit rating of the
Remainder Notes on the date hereof by both of the Rating Agencies, or (y) in the
reasonable discretion of the managing general partner of Optionor, there has
been, as compared to the date hereof, a material diminution or degradation in
the value of the assets of the Investment Loan Borrower or the ability of the
Investment Loan Borrower to pay its outstanding obligations as they become due
from the date hereof.


                                 Defined Terms
                                 -------------

     As used herein, the following terms shall have the following meanings:

     "DETERMINATION DATE" shall mean the date upon which the Fair Market Value
of the Remainder Notes is determined and shall occur at 10:00 a.m. (New York
City time) on the date that the Option Election Notice or Put Election Notice,
as the case may be, is received by the addressee thereof.

     "DISCOUNT RATE" shall mean the Reinvestment Rate plus the Margin.

                                      B-1

 
     "MARGIN" shall mean, with respect to any Remainder Note, the Margin (as
defined in the Investment Loan Note Purchase Agreement) of such Remainder Note.

     "RATING AGENCIES" shall mean Fitch IBCA, Inc. and Standard and Poor's
Corporation.

     "REINVESTMENT RATE" shall mean, with respect to any Remainder Note, the
offered-side yield to maturity as of the Determination Date of the U.S. Treasury
security that was used to determine the then Treasury (as defined in the
Investment Loan Note Purchase Agreement) of such Investment Note.

     "REMAINING CASH FLOW" shall mean, for any Remainder Note, the aggregate
amount of all accrued and unpaid interest, principal and other payments under
such Remainder Note on the Closing Date and all principal, interest and other
payments that will become due and owing under such Remainder Note from time to
time from and after the Closing Date through (x) the next Rate Reset Date of
such Remainder Note (the "Next Reset Date"), if the Fair Market Value is
determined prior to such Rate Reset Date, or (y) the maturity of such Remainder
Note (including, without limitation, any balloon or other principal payments due
and owing on said maturity date), if the Fair Market Value is determined after
all Rate Reset Dates provided in such Remainder Note, as each such payment would
become due and payable pursuant to the terms of the applicable Remainder Note
and the Investment Loan Documents ( but assuming, if clause (x) above applies,
                                                     ----------               
that any interest that is scheduled to be accrued but unpaid as of the Next
Reset Date (i.e., because the interest payment date with respect thereto will
            ----                                                             
not have occurred), and any outstanding principal and any other amounts under
the Investment Note on such Next Reset Date, will be repaid in full on the Next
Reset Date; and further assuming, for purposes of calculating all future
interest payments due under such Remainder Note, that the interest rate in
effect with respect to the Remainder Note on the Closing Date will remain
constant for purposes of determining the Fair Market Value of such Remainder
Note).

                                      B-2

 
                                   EXHIBIT C

                      FORM OF ALLONGE TO REMAINDER NOTES
                      ----------------------------------


Date of Note:  __________________________
Maker:  Prudential Realty Securities, Inc.
Face Amount:  $__________________________


PAY TO THE ORDER OF __________________________________, WITHOUT RECOURSE,
REPRESENTATION OR WARRANTY, EXCEPT AS SPECIFICALLY PROVIDED IN THAT CERTAIN
OPTION AND PUT AGREEMENT DATED AS OF NOVEMBER ___, 1998, BY AND AMONG FOUR
EMBARCADERO CENTER VENTURE, AS OPTIONOR, AND THE PRUDENTIAL INSURANCE COMPANY OF
AMERICA, AS OPTIONEE.

Dated:  ______________, 199__



                         FOUR EMBARCADERO CENTER VENTURE,
                         a California general partnership

                         By:  BOSTON PROPERTIES LLC,
                              a Delaware limited liability company,
                              as Managing General Partner

                              By:   BOSTON PROPERTIES LIMITED
                                    PARTNERSHIP, a Delaware limited
                                    partnership, as Manager

                                    By:  BOSTON PROPERTIES, INC.
                                         a Delaware Corporation,
                                         as General Partner



                                         By:  __________________________________
                                         Name: _________________________________
                                         Title:   ______________________________

                                      C-1

 
                                   EXHIBIT D

                       FORM OF ASSIGNMENT AND ASSUMPTION
                       ---------------------------------
                                    OF LOAN
                                    -------


                           ASSIGNMENT AND ASSUMPTION
                                    OF LOAN

          FOR VALUE RECEIVED, the receipt and sufficiency of which are hereby
acknowledged, FOUR EMBARCADERO CENTER VENTURE, a California general partnership
("ASSIGNOR"), hereby sells, grants, assigns and transfers to __________________
("ASSIGNEE"), without recourse, representation or warranty (except as expressly
set forth in that certain Option and Put Agreement dated as of November ___,
1998, by and between Assignor and The Prudential Insurance Company of America),
and Assignee hereby purchases and assumes from Assignor, (i) all right, title
and interest of Assignor under and in connection with those certain promissory
notes evidencing the principal amount of _________________________ Dollars
($_______________), executed and delivered by Prudential Realty Securities,
Inc., as "maker" (the "REMAINDER NOTES"), and (ii) the rights of Assignor in, to
and under all documents and instruments listed on Exhibit A attached hereto and
                                                  ---------                    
incorporated herein by this reference, which documents and instruments further
evidence, secure and/or govern the Remainder Notes; but only to the extent that
such documents and instruments relate to the Remainder Notes (it being
acknowledged and agreed that the Remainder Notes are a portion of a
$_____________ loan and that the principal balance of such loan that is not
evidenced by the Remainder Notes (and all documents and instruments relating to
such principal balance) has been transferred to The Prudential Insurance Company
of America).  The Remainder Notes and all other documents listed on Exhibit A
                                                                    ---------
attached hereto to the extent they relate to the Remainder Notes shall sometimes
hereinafter be collectively referred to as the "INVESTMENT LOAN DOCUMENTS".

          Assignee hereby accepts the foregoing assignment and agrees to assume,
pay, perform and discharge, as and when due, all of the agreements, obligations
and liabilities of Assignor under or arising from or out of the Remainder Notes
and the Investment Loan Documents (but only to the extent relating to the
Remainder Notes) to be paid, performed or discharged on and after the date
hereof and agrees to be bound by all of the terms and conditions of the
Investment Loan Documents to be performed on and after the date hereof (but only
to the extent relating to the Remainder Notes) (all such items, collectively,
the "POST-CLOSING OBLIGATIONS").


                           [SIGNATURES ON NEXT PAGE]

                                      D-1

 
          This Assignment shall be binding upon and inure to the benefit of
Assignor and Assignee, and their respective successors and assigns.

                              "ASSIGNOR"

                              FOUR EMBARCADERO CENTER VENTURE,
                              a California General Partnership

                              By:   BOSTON PROPERTIES LLC,
                                    a Delaware limited liability company,
                                    as Managing General Partner

                                    By:  BOSTON PROPERTIES LIMITED
                                         PARTNERSHIP, a Delaware limited
                                         partnership, as Manager

                                         By:  BOSTON PROPERTIES,
                                              INC., a Delaware corporation,
                                              as General Partner



                                              By:_____________________
                                              Name:___________________
                                              Title:__________________


                              "ASSIGNEE"

                              [INSERT ASSIGNEE SIGNATURE BLOCK]

                                      D-2

 
                              JOINDER AND RELEASE
                              -------------------


     The undersigned, as maker of the Remainder Notes, hereby agrees to release
the Assignor from all Post-Closing Obligations and shall look only to Assignee
for satisfaction of the same.

                              PRUDENTIAL REALTY SECURITIES, INC.,
                              a Delaware corporation



                              By: _________________________________
                              Name: _______________________________
                              Title: ______________________________

                                      D-3

 
                                                                   EXHIBIT 99.23

                           STOCK PURCHASE AGREEMENT

                                by and between


                 THE PRUDENTIAL INSURANCE COMPANY OF AMERICA,
                                  as Investor

                                      and

                            BOSTON PROPERTIES, INC.
                                  as Company



                           Dated: September 28, 1998

 
                           STOCK PURCHASE AGREEMENT

                                     INDEX

                                                                                            
SECTION 1.          SALE OF SHARES AND AGGREGATE PURCHASE PRICE.............................    1
- ----------          -------------------------------------------
              1.1   Purchase Price and Payment..............................................    1
                    --------------------------
              1.2   Transfer of Shares......................................................    1
                    ------------------
              1.3   Time and Place of Closing...............................................    2
                    -------------------------
              1.4   Further Assurances......................................................    2
                    ------------------

SECTION 2.          REPRESENTATIONS AND WARRANTIES OF THE COMPANY...........................    2
- ----------          ---------------------------------------------
              2.1   Making of Representations and Warranties................................    2
                    ----------------------------------------
              2.2   Organization, Good Standing and Authority...............................    2
                    -----------------------------------------
              2.3   Company's Authorization and Binding Effect..............................    3
                    ------------------------------------------
              2.4   Capitalization; Status of Shares........................................    3
                    --------------------------------
              2.5   Conflicting Agreements and Other Matters................................    4
                    ----------------------------------------
              2.6   Litigation, Proceedings, etc............................................    5
                    ----------------------------
              2.7   No Default or Violation.................................................    5
                    -----------------------
              2.8   Governmental Consents, etc..............................................    5
                    --------------------------
              2.9   No Registration Under the Securities Act; No
                    --------------------------------------------
                    General Solicitation. Registration of Shares............................    6
                    --------------------------------------------
              2.10  Insurance...............................................................    6
                    ---------
              2.11  Information Provided....................................................    6
                    --------------------
              2.12  No Other Liabilities....................................................    7
                    --------------------
              2.13  The Partnership; Taxes; REIT Status.....................................    7
                    -----------------------------------
              2.14  Compliance With Laws....................................................    7
                    --------------------
              2.15  SEC Documents...........................................................    7
                    -------------
              2.16  Material Contracts......................................................    8
                    ------------------
              2.17  No Merger Agreement.....................................................    8
                    -------------------
              2.18  Certain Actions by the Company..........................................    8
                    ------------------------------
              2.19  No Investment Company Status............................................    8
                    ----------------------------

SECTION 3.          COVENANTS OF THE COMPANY................................................    9
                    ------------------------
              3.1   Making of Covenants and Agreements......................................    9
                    ----------------------------------
              3.2   Conduct of Business.....................................................    9
                    -------------------
              3.3   Information Rights......................................................    9
                    ------------------
              3.4   Consultation Rights.....................................................   10
                    -------------------
              3.5   Notice of Default.......................................................   10
                    -----------------
              3.6   Consummation of Agreement...............................................   10
                    -------------------------
              3.7   Cooperation of the Company..............................................   10
                    --------------------------
              3.8   Negative Covenants of the Company.......................................   10
                    ---------------------------------
              3.9   Survival................................................................   11
                    --------
(i) SECTION 4. REPRESENTATIONS AND WARRANTIES OF INVESTOR.............................. 11 - ---------- ------------------------------------------ 4.1 Making of Representations and Warranties of Investor.................... 11 ---------------------------------------------------- 4.2 Investor's Organization................................................. 11 ----------------------- 4.3 Investment Intent....................................................... 11 ----------------- 4.4 Investor Status......................................................... 11 --------------- 4.5 Access to Information................................................... 12 --------------------- 4.6 Reliance................................................................ 12 -------- 4.7 No Advertisement or Solicitation........................................ 12 -------------------------------- 4.8 Other Investor Representations.......................................... 12 ------------------------------ SECTION 5. COVENANTS OF INVESTOR................................................... 13 - ---------- --------------------- 5.1 Making of Covenants and Agreement....................................... 13 --------------------------------- 5.2 Legends................................................................. 13 ------- 5.3 Confidentiality of Information.......................................... 13 ------------------------------ 5.4 Consummation of Agreement............................................... 14 ------------------------- 5.5 Cooperation of Investor................................................. 14 ----------------------- SECTION 6. CONDITIONS.............................................................. 14 - ---------- ---------- 6.1 Conditions to the Obligations of Investor............................... 14 ----------------------------------------- 6.2 Conditions to Obligations of the Company................................ 17 ---------------------------------------- SECTION 7. TERMINATION OF AGREEMENT; RIGHTS TO PROCEED............................. 17 - ---------- ------------------------------------------- 7.1 Termination............................................................. 17 ----------- 7.2 Effect of Termination................................................... 18 --------------------- 7.3 Right to Proceed........................................................ 18 ---------------- SECTION 8. RIGHTS AND OBLIGATIONS SUBSEQUENT TO CLOSING............................ 18 - ---------- -------------------------------------------- 8.1 Survival................................................................ 18 -------- SECTION 9. INDEMNIFICATION......................................................... 18 - ---------- --------------- 9.1 Indemnification by the Company.......................................... 18 ------------------------------ 9.2 Indemnification by Investor............................................. 19 --------------------------- 9.3 Notice; Defense of Claims............................................... 19 ------------------------- SECTION 10. MISCELLANEOUS........................................................... 20 - ----------- ------------- 10.1 Fees and Expenses....................................................... 20 ----------------- 10.2 Governing Law........................................................... 20 ------------- 10.3 Notices................................................................. 20 ------- 10.4 Entire Agreement........................................................ 21 ---------------- 10.5 Assignability; Binding Effect........................................... 21 ----------------------------- 10.6 Captions and Gender..................................................... 22 ------------------- 10.7 Execution in Counterparts............................................... 22 ------------------------- 10.8 Amendments.............................................................. 22 ---------- 10.9 Publicity and Disclosures............................................... 22 -------------------------
(ii) 10.10 Consent to Jurisdiction................................................. 22 ----------------------- 10.11 Specific Performance.................................................... 22 --------------------
Schedule 2.4 - Capitalization, Status of Shares Schedule 2.5 - Conflicting Agreements Schedule 2.8 - Required Governmental Consents Schedule 2.11 - Information Provided Schedule 2.12 - Other Liabilities Schedule 2.16 - Material Contracts Schedule 2.17 - Merger Agreements Schedule 4.8(a) - Litigation Exhibit A - Form of Registration Rights Agreement Exhibit B - Form of Opinions of Company's Counsel Exhibit C - Confidentiality Agreement Exhibit D - Form of Agreement Regarding Certain Information Exhibit E - Form of Certificate of Designations Exhibit F - Form of Ownership Resolutions (iii) STOCK PURCHASE AGREEMENT ------------------------ THIS STOCK PURCHASE AGREEMENT (this "AGREEMENT") is entered into as of September ___, 1998, by and between BOSTON PROPERTIES INC., a Delaware corporation (the "COMPANY"), and THE PRUDENTIAL INSURANCE COMPANY OF AMERICA, a New Jersey corporation (the "INVESTOR"). W I T N E S S E T H ------------------- WHEREAS, the Company has agreed to issue and sell to Investor, and Investor has agreed to purchase from the Company, shares of a newly created class of the Company's Series A Convertible Redeemable Preferred Stock (the "SERIES A PREFERRED STOCK"), for aggregate cash consideration of $100,000,000.00; and WHEREAS, Investor desires to purchase such Series A Preferred Stock on the terms and subject to the conditions set forth in this Agreement. NOW, THEREFORE, in order to consummate said purchase and sale and in consideration of the mutual agreements set forth herein, the parties hereto agree as follows: SECTION 1. SALE OF SHARES AND AGGREGATE PURCHASE PRICE. - ---------------------------------------------------------- 1.1 Purchase Price and Payment. (a) In consideration of the sale by the -------------------------- Company to Investor of the 2,000,000 shares of Series A Preferred Stock to be acquired by Investor pursuant to this Agreement (the "SHARES") and in reliance upon the representations and warranties of the Company herein contained and to be reconfirmed at the Closing and subject to the satisfaction of all of the conditions contained herein, Investor agrees that at the Closing, Investor will deliver to the Company the aggregate amount of $100,000,000.00 (the " PURCHASE PRICE"). (b) The purchase price per Share (the "PER SHARE PRICE") shall be equal to $50.00 per share. (c) The Purchase Price shall be delivered on the Closing Date to the Company by wire transfer of immediately available funds, to a bank account of the Company specified by the Company at least three (3) business days prior to the Closing. 1.2 Transfer of Shares. At the Closing the Company shall deliver or cause ------------------ to be delivered to Investor one or more certificates (in Investor's name or in the name of Investor's nominees or designees as the Investor shall have informed the Company at least three (3) business days prior to the Closing), representing the 2,000,000 Shares that Investor is entitled to receive. 1.3 Time and Place of Closing. The closing of the purchase and sale ------------------------- provided for in this Agreement (herein called the "CLOSING") shall be held at the offices of Goodwin, Procter & Hoar LLP, 599 Lexington Avenue, 40th Floor, New York, New York 10022, on the Closing Date. For purposes of this Agreement, "CLOSING DATE" means the earlier to occur of: (i) ninety (90) days after the "CLOSING DATE" (as defined in that certain Master Transaction Agreement of even date herewith, by and among the Company, Investor, Boston Properties Limited Partnership, PIC Realty Corporation, Fedmark Corporation, Embarcadero Center Investors Partnership, Pacific Property Services, L.P. and certain other persons listed on Exhibit A attached thereto (the "MASTER TRANSACTION AGREEMENT")) , or if such ninetieth (90th) day is not a business day, the next ensuing business day (the "OUTSIDE DATE"); and (ii) the date (the "REDEMPTION DATE") that the redemption transactions described in those certain Redemption Agreements (as defined in the Master Transaction Agreement) are consummated in accordance with the terms of such Redemption Agreements; provided, however, that in the event the Redemption Date is the earlier date, then the Company (in its sole discretion) may elect, by written notice provided to the Investor within three (3) business days of receipt of a Redemption Notice (as defined in the Redemption Agreements), to delay the Closing until any future date prior to and including the Outside Date (provided that the Company provides Investor with at least five (5) business days written notice of the date of such delayed Closing hereunder). 1.4 Further Assurances. The Company from time to time after the Closing ------------------ at the request of Investor and without further consideration shall execute and deliver further instruments of transfer and assignment and take such other action as Investor may reasonably require to more effectively transfer and assign to, and vest in, Investor the Shares and all rights thereto, and to fully implement the provisions of this Agreement. SECTION 2. REPRESENTATIONS AND WARRANTIES OF THE COMPANY. - ------------------------------------------------------------ 2.1 Making of Representations and Warranties. As a material inducement to ---------------------------------------- Investor to enter into this Agreement and consummate the transactions contemplated hereby, the Company hereby makes to Investor the representations and warranties contained in this Section 2. --------- 2.2 Organization, Good Standing and Authority. The Company is a ----------------------------------------- corporation, and the Boston Properties Limited Partnership (the "PARTNERSHIP") and each other entity in which the Company directly or indirectly owns, holds or controls twenty percent (20%) or more of any class of voting equity securities of such entity and an equity investment with a current fair market value of $10,000,000.00 or more (collectively, the "SUBSIDIARIES," or individually, a "SUBSIDIARY") is a general or limited partnership, limited liability company or corporation, each of which is (a) duly organized, validly existing and in good standing under the laws of its respective state of incorporation or formation and (b) duly qualified to do business in all jurisdictions where such qualification is necessary to carry on its business as now conducted, except where failure to do so would not have a material adverse effect upon the assets, liabilities, financial condition, earnings 2 or operations of the Company and the Subsidiaries, taken as a whole (such change a "MATERIAL ADVERSE EFFECT") and the Company and each Subsidiary of the Company is authorized to consummate the transactions contemplated hereby and fulfill all of their respective obligations hereunder and under all documents contemplated hereunder to be executed by the Company and/or any such Subsidiary of the Company, and has all necessary power to execute and deliver this Agreement and all documents contemplated hereunder to be executed by the Company and/or any such Subsidiary of the Company, and to perform all of their respective obligations hereunder and thereunder. The Company has (i) delivered to Investor true, correct and complete copies of (a) its certificate of incorporation and bylaws and (b) the Amended and Restated Agreement of Limited Partnership (the "PARTNERSHIP AGREEMENT") of the Partnership and the Partnership's certificate of limited partnership and (ii) made available to Investor the certificate of incorporation and bylaws, or the partnership agreement and certificate of partnership or certificate of limited partnership or other formation and organizational documents, as the case may be, of each of the Subsidiaries. 2.3 Company's Authorization and Binding Effect. This Agreement has, and ------------------------------------------ all documents contemplated hereunder to be executed by the Company when executed and delivered will have been duly authorized by all requisite corporate action on the part of the Company and are, or will be upon execution and delivery, as applicable, the valid and legally binding obligation of the Company enforceable in accordance with their respective terms, subject to bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium and similar laws of general applicability relating to or affecting creditors' rights generally and to general principles of equity. Neither the execution and delivery of this Agreement and all documents contemplated hereunder to be executed by the Company, nor the performance of the obligations of the Company hereunder or thereunder will result in the violation of any provision of the certificate of organization or bylaws of the Company, or will conflict with any order or decree of any court or governmental instrumentality of any nature by which the Company is bound. 2.4 Capitalization; Status of Shares. -------------------------------- (a) Schedule 2.4 sets forth as of the date of this Agreement (i) the ------------ total number of shares of the outstanding capital stock of the Company and the Subsidiaries, (ii) all options, warrants and registration rights with respect to such stock, (iii) contractual obligations, commitments, understandings or arrangements of the Company or any of its Subsidiaries to repurchase, redeem or otherwise acquire, require or make any payment in respect of any shares of equity securities of the Company or any such Subsidiary, (iv) contractual restrictions on the payment of dividends or other distributions or amount on or in respect of any of the Company's capital stock, and (v) agreements or arrangements restricting the voting or transfer of any equity securities of the Company. All of the outstanding shares of capital stock of the Company (including the Shares when issued and delivered as contemplated by the terms of this Agreement) or any Subsidiary are duly and validly issued, fully paid and non-assessable and not subject to any preemptive rights of other shareholders. At the Closing the Company will have transferred the Shares to be issued 3 hereunder free and clear of all liens, pledges, encumbrances, mortgages, charges or security interests of any kind (each individually a "LIEN" and collectively referred to as "LIENS"). The issuance of the Shares to Investor at the Closing will not require any material approval or consent of any individual, partnership, corporation, trust, unincorporated organization, or any government or agency or political subdivision thereof (each a "PERSON") except any such approval that shall have been obtained on or prior to the Closing. (b) The shares of common stock of the Company, $0.01 par value (the "COMMON STOCK") issuable upon the conversion of Series A Preferred Stock in accordance with the terms of the Certificate of Designations (defined below) will be duly and validly reserved for issuance and when issued upon such conversion will be duly and validly authorized and issued, fully paid and non- assessable. Upon conversion of any shares of Series A Preferred Stock in accordance with the terms of the Certificate of Designations, the Common Stock issuable upon such conversion will be issued free and clear of all Liens and the issuance of such Common Stock will not require any approval or consent of any Person except any such approval that shall have been obtained on or prior to the Closing. 2.5 Conflicting Agreements and Other Matters. Neither the Company nor any ---------------------------------------- Subsidiary is a party to any contract or agreement or subject to any certificate of incorporation or other corporate restriction compliance with which could reasonably be expected to have Material Adverse Effect. Neither the execution and delivery of the documents relating to the transaction contemplated herein nor fulfillment of nor compliance with the terms and provisions thereof, nor the issuance of the Shares to Investor (or the issuance of Common Stock upon a conversion of the Shares) pursuant to this Agreement will (i) to the Company's knowledge violate any provision of any law, statute, ordinance, order, rule, regulation or interpretation of any thereof presently in effect or in effect at the Closing Date having applicability to the Company or any Subsidiary or any of their properties, except such violations as could not reasonably be expected to have a Material Adverse Effect, (ii) conflict with or result in a breach of or constitute a default under the certificate of incorporation or bylaws or any other organizational document of either the Company or any Subsidiary, (iii) except as set forth in Schedule 2.5, require any consent, approval or notice ------------ under, or conflict with or result in a breach of, constitute a default or accelerate any right under, any note, bond, mortgage, license, indenture or loan or credit agreement, or any other agreement or instrument, to which the Company or any Subsidiary is a party or by which any of their respective properties is bound, except where the failure to obtain such consents, approvals, notices, conflicts, breaches or defaults could not reasonably be expected to have a Material Adverse Effect or (iv) result in, or require the creation or imposition of, any Lien upon or with respect to any of the properties now owned or hereafter acquired by the Company or any Subsidiary. Neither the Company nor any Subsidiary is bound by any agreement which would impose upon Investor any personal obligation or personal liability which is greater than the personal obligations and personal liabilities imposed upon Investor under this Agreement and the Registration Rights Agreement (as defined in Section 6.1(d) below). In -------------- addition, the Company 4 is not aware of any facts or circumstances that, individually or in the aggregate, could reasonably be expected to have a Material Adverse Effect. 2.6 Litigation, Proceedings, etc. There is (a) no action, suit, notice of ---------------------------- violation or proceeding pending or, to the best knowledge of the Company, threatened against or affecting the Company or any Subsidiary or any of their respective properties before or by any agency, bureau, commission, court, department, official, political subdivision, tribunal or other instrumentality of any government, whether federal, state or local, domestic or foreign (each a "GOVERNMENTAL ENTITY") which could (individually or in the aggregate) reasonably be expected to have a Material Adverse Effect, and (b) to the best knowledge of the Company, there is no investigation or pending against or affecting the Company or any Subsidiary or any of their respective properties by any Governmental Entity which in either case (i) challenges the legality, validity or enforceability of any of the documents relating to the transactions contemplated under this Agreement, or (ii) could (individually or in the aggregate) reasonably be expected to have a Material Adverse Effect, or (iii) would (individually or in the aggregate) impair the ability of the Company to perform fully on a timely basis any obligations which it has under this Agreement or the Registration Rights Agreement. 2.7 No Default or Violation. Neither the Company nor any Subsidiary is ----------------------- (i) in default under or in violation of any indenture, loan or credit agreement or any other agreement or instrument to which it is a party or by which it or any of its properties is bound, except for violations or defaults that would not result in a Material Adverse Effect, (ii) in violation of any order, decree, injunction, judgment, ruling, assessment, writ, or executive mandate of any Governmental Entity, except for violations or defaults that would not result in a Material Adverse Effect, or (iii) in violation of any law which could reasonably be expected to (A) adversely affect the legality, validity or enforceability of this Agreement, (B) have a Material Adverse Effect or (C) adversely impair the Company or any Subsidiary's ability or obligation to perform fully on a timely basis any obligation which it has under this Agreement or the Registration Rights Agreement. 2.8 Governmental Consents, etc. Except as may be required under any -------------------------- applicable securities law in connection with the performance by the Company of its obligations under the Registration Rights Agreement, and assuming the accuracy of the representations and warranties of, and the performance of the agreements of, Investor set forth herein, no authorization, consent, approval, waiver, license, qualification or formal exemption from, nor any filing, declaration, qualification or registration with, any Governmental Entity or any securities exchange is required in connection with the execution, delivery or performance by the Company of this Agreement and the issuance of the Shares to Investor pursuant to this Agreement except for the filing of the Certificate of Designations (defined below) with the Delaware Secretary of State and except for those that (i) have been made or obtained by the Company as of the date hereof or (ii) are set forth in Schedule 2.8. At the Closing Date, the Company will ------------ have made all filings and given all notices to Governmental Entities and obtained all necessary ordinances, registrations, declarations, 5 approvals, orders, consents, qualifications, franchises, certificates, permits and authorizations from any Governmental Entity, to own or lease its properties and to conduct its property and businesses as currently conducted, except where failure to do so could not reasonably be expected to have a Material Adverse Effect. At the Closing Date, all such registrations, declarations, approvals, orders, consents, qualifications, franchises, certificates, permits and authorizations, the failure of which to file, give notice of or obtain could reasonably be expected to have a Material Adverse Effect, will be in full force and effect. The assets of the Company qualify as exempt assets for purposes of the Hart-Scott-Rodino Act and no filing under the Hart-Scott-Rodino Act is required in connection with the issuance of the Shares to Investor pursuant to this Agreement. 2.9 No Registration Under the Securities Act; No General Solicitation. ------------------------------------------------------------------ Registration of Shares. - ---------------------- (a) Assuming the continuing accuracy of Investor's representations set forth in Section 4 and compliance by Investor with the transfer restrictions set --------- forth in the legends on the certificates evidencing the Shares, it is not necessary in connection with the offer, sale and delivery of the Shares in the manner contemplated by this Agreement (or the conversion of the Shares into Common Stock in accordance with their terms) to register the Shares (or such Common Stock) under the Securities Act of 1933, as amended (the "SECURITIES ACT"). (b) Neither the Company nor any affiliate (as defined in Rule 501(b) of Regulation D under the Securities Act, an "AFFILIATE") of the Company has directly, or through an agent, (i) sold, offered for sale, solicited offers to buy or otherwise negotiated in respect of any security (as defined in the Securities Act) which is or will be integrated with the sale of the Shares in a manner that would require registration under the Securities Act of the Shares or (ii) engaged in any form of general solicitation or general advertising in connection with the offering of the Shares (as those terms are used in Regulation D under the Securities Act). 2.10 Insurance. At Closing, the Company and/or any Subsidiary will have --------- (i) with respect to each property owned by the Company or any Subsidiary, "all risk" property insurance, including fire, flood, earthquake, extended coverage and rental loss insurance and (ii) with respect to the Company and each of the Subsidiaries, and each property owned by the Company or any Subsidiary, general commercial liability insurance, in each case under such terms and in such amounts and covering such risks that are customary for properties and businesses similar to those of the Company and any Subsidiary. There are currently no outstanding material losses for which the Company or any Subsidiary has failed to give or present notice or claim under any policy. Policies for all the insurance are in full force and effect and none of the Company or any or the Subsidiaries is in default in any material respect under any of the policies. 2.11 Information Provided. Neither (a) this Agreement, the schedules and -------------------- exhibits hereto, nor (b) any other written document delivered to Investor in connection with the transactions contemplated hereby and identified on Schedule -------- 2.11 attached hereto, contain any - ---- 6 untrue statement of a material fact or omit any material fact necessary to make the statements herein or therein, as the case may be, in light of the circumstances under which it was made, not misleading, and all material information regarding the Company and all Subsidiaries is provided therein or in the SEC Documents referred to in Section 2.15 below. ------------ 2.12 No Other Liabilities. Except as set forth in Schedule 2.12, neither -------------------- ------------- the Company nor any of the Subsidiaries has any material liability whether absolute, accrued, contingent or otherwise, of a nature required to be disclosed in financial statements (or the notes thereto) prepared in accordance with generally accepted accounting principles, consistently applied, except liabilities (i) reflected on the consolidated balance sheet of the Company and the Subsidiaries as of December 31, 1997 (or the notes thereto), or (ii) liabilities that (1) were incurred by the Company or any of the Subsidiaries after December 31, 1997 in the ordinary course of business or (2) could not reasonably be expected to have a Material Adverse Effect. 2.13 The Partnership; Taxes; REIT Status. The Partnership Agreement of ----------------------------------- the Partnership is in full force and effect, a true, complete and correct copy thereof has been delivered to Investor and there are no dissolution, termination or liquidation proceedings pending or contemplated with respect to the Partnership. The Partnership is, and has been since the date of formation, taxable as a "partnership" as defined in Section 7701(a) of the Internal Revenue Code of 1986, as amended (together with the rules and regulations promulgated thereunder as in effect on the date hereof, the "CODE"), and is, and has been since the date of formation, not taxable as a corporation by reason of not being a publicly traded partnership within the meaning of Section 7704 of the Code. Each of the Company and Subsidiaries has filed all tax returns that are required to be filed with any Governmental Entity (except in any case in which the failure so to file would not have a Material Adverse Effect), and has paid all taxes due pursuant to the tax returns or any assessment received by it or otherwise required to be paid, except taxes being contested in good faith by appropriate proceedings and for which adequate reserves or other provisions are maintained. The Company has (i) elected to be taxed as a REIT effective for the taxable year ending December 31, 1997, (ii) has not revoked such election, (iii) qualifies for taxation as a REIT for such taxable year and for its current taxable year, (iv) operates, and intends to continue to operate, in a manner so as to qualify as a REIT, and (v) has not sold or otherwise disposed of any assets which could give rise to a material amount of tax pursuant to any election made by the Company under Notice 88-19, 1988-1 CB 486 and does not expect to effect any such sale or other disposition. 2.14 Compliance With Laws. Neither the Company nor any Subsidiary has been -------------------- in or is in, and none of them has received written notice of, violation of or default with respect to, any law or any decision, ruling, order or award of any arbitrator applicable to it or its business, properties or operations except for violations or defaults that, individually or in the aggregate, would not result in a Material Adverse Effect. 2.15 SEC Documents. The Company has filed with the Securities and Exchange ------------- Commission (the "Commission") all financial statements, reports, schedules, forms, statements 7 and other documents required by the Securities Act, and Securities Exchange Act of 1934, as amended, (the "EXCHANGE ACT") to be filed by the Company (collectively, and in each case including all exhibits and schedules thereto and documents incorporated by reference therein, the "SEC DOCUMENTS"). The Company has delivered or made available to Investor all SEC Documents. As of their respective filing dates, (or if amended, revised or superseded by a subsequent filing with the Commission, then as of the date of such subsequent filing), the SEC Documents complied in all material respects with the requirements of the Securities Act or the Exchange Act, as the case may be, and none of the SEC Documents (including any and all financial statements included or incorporated by reference therein) as of such dates contained any untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary in order to make the statements therein, in light of the circumstances under which they are made, not misleading. The consolidated financial statements of the Company and its Subsidiaries included in all SEC Documents, including any amendments thereto, comply as to form in all material respects with applicable accounting requirements and the published rules and regulations of the Commission with respect thereto. 2.16 Material Contracts. The SEC Documents and Schedule 2.16 include a ------------------ ------------- correct and complete list of the following with respect to the Company and the Subsidiaries: (i) agreements with any shareholder having beneficial ownership of 5% or more of the shares of the stock of the Company then issued and outstanding, director or officer of the Company and all shareholders' agreements and voting trusts; and (ii) agreements not made in the ordinary course of business and which would reasonably be expected to result in a Material Adverse Effect. 2.17 No Merger Agreement. As of the date hereof, except as set forth in ------------------- Schedule 2.17, neither the Company nor any Subsidiary has entered into any - ------------- agreement with any person or entity which has not been terminated as of the date of this Agreement and under which there remains any material liability or obligation thereof with respect to a merger or consolidation with either the Company or any Subsidiary, or any other acquisition of a substantial amount of the assets of the Company or any Subsidiary which would reasonably be expected to result in a Material Adverse Effect. 2.18 Certain Actions by the Company. Neither the Company nor any of the ------------------------------ Subsidiaries has: (i) made a general assignment for the benefit of creditors; (ii) filed any voluntary petition in bankruptcy or suffered the filing of any involuntary petition by such entities' creditors; (iii) suffered the appointment of a receiver to take possession of all or substantially all of such entities' assets; (iv) suffered the attachment or other judicial seizure of all, or substantially all, of such entities' assets; (v) admitted in writing such entities' inability to pay its debts as they come due; or (vi) made an offer of settlement, extension, or composition to its creditors generally. 2.19 No Investment Company Status. The Company is not subject to ---------------------------- registration as an investment company under the Investment Company Act of 1940, as amended, and the transactions 8 contemplated by this Agreement will not cause the Company to become an investment company subject to registration under such Act. SECTION 3. COVENANTS OF THE COMPANY - ------------------------------------- 3.1 Making of Covenants and Agreements. The Company hereby makes the ---------------------------------- covenants and agreements set forth in this Section 3. --------- 3.2 Conduct of Business. Between the date of this Agreement and the ------------------- Closing Date, the Company and each of its Subsidiaries will: (a) Conduct its business only in the ordinary course and refrain from changing or introducing any method of management or operations except in the ordinary course of business and consistent with prior practices, provided that the Company shall not have breached its obligation with respect to this subsection 3.2(a) as long as the aggregate effect of all changes in the conduct - ----------------- of the Company's business and its methods of management and operations could not reasonably be expected to result in a Material Adverse Effect; and (b) Use its reasonable best efforts to keep intact its business organization and use reasonable efforts to keep available its present officers and employees and to preserve the goodwill of all individuals and entities having business relations with it. 3.3 Information Rights. For the period that the Prudential Investors (as ------------------ such term is defined in Section 10.5) own, in the aggregate at least $40,000,000 of the Company's Common Stock, including all Common Stock issuable to any such Prudential Investor or any affiliate of Investor upon a conversion of Shares or upon a redemption or in exchange for limited partnership units in the Partnership, on a fully diluted basis (the "QUALIFICATION PERIOD"), Investor shall be entitled to receive from the Company: (i) upon reasonable notice to the Company, reasonable access to the books and records of the Company and the Subsidiaries during normal business hours to review any information that is reasonably related to or necessary for Investor to formulate informed opinions regarding the operating and financial matters of the Company and to effectively exercise Investor's consultation rights pursuant to Section 3.4 hereof; ----------- provided, however, that with respect to this clause (i), Investor acknowledges - -------- ------- that (a) the Company will not be required to furnish or provide access to any information that the Company reasonably believes would constitute material nonpublic information, unless, at the Company's request, Investor agrees with the Company in writing, substantially in the form attached hereto as Exhibit D, --------- not to trade in the securities of the Company until such time as such material information becomes public and (b) Investor shall, in any event, be required to keep all material nonpublic information received by Investor pursuant to this clause (i) confidential (which precludes the disclosure of such information to any other party, including Prudential Securities Incorporated or investors or potential investors in Investor) and shall not use such information for any purpose other than evaluating its investment in the Company and evaluating the operating and financial matters of the Company in connection 9 with Investor's consultation rights pursuant to Section 3.4 hereof; (ii) ----------- information filed with the Commission including amendments thereto, and non- confidential filings with any other regulatory bodies; and (iii) non- confidential operating information of the same general nature as the Company provides to financial analysts, concurrently with its provision of such information to financial analysts. 3.4 Consultation Rights. During the Qualification Period, Investor shall ------------------- have the right to consult from time to time (but in any event not more frequently than five (5) times in any calendar year) with the management of the Company and the Subsidiaries, upon reasonable notice and during normal business hours, at their respective places of business regarding operating and financial matters of the Company and the Subsidiaries. 3.5 Notice of Default. Between the date of this Agreement and Closing, ----------------- promptly upon the occurrence of, or promptly upon the Company becoming aware of the impending or threatened occurrence of, any event which would cause or constitute a breach or default, or would have caused or constituted a breach or default had such event occurred or been known to the Company prior to the date hereof, of any of the representations, warranties or covenants of the Company contained in or referred to in this Agreement or in any Schedule or Exhibit referred to in this Agreement, the Company shall give detailed written notice thereof to Investor and the Company shall use its best efforts to prevent or promptly remedy the same. 3.6 Consummation of Agreement. The Company shall use its reasonable best ------------------------- efforts to perform and fulfill all conditions and obligations on its part to be performed and fulfilled under this Agreement, to the end that the transactions contemplated by this Agreement shall be fully carried out. To this end, the Company will obtain prior to the Closing all necessary authorizations or approvals of its stockholders and Board of Directors. 3.7 Cooperation of the Company. The Company shall cooperate with all -------------------------- reasonable requests of Investor and Investor's counsel in connection with the consummation of the transactions contemplated hereby. 3.8 Negative Covenants of the Company. The Company covenants and agrees --------------------------------- as follows, and shall not enter into any agreement or take any other action inconsistent with the following, in each case until the earlier of the Closing or the termination of this Agreement, except as specifically contemplated by this Agreement or to the extent such action shall not reasonably be expected to result in a Material Adverse Effect: (a) Organizational Documents. The Company shall not amend the ------------------------ Company's articles of incorporation or by-laws and shall not permit any of the Subsidiaries to amend its articles or certificate of incorporation, by-laws or other relevant organizational documents. (b) Mergers, Etc. Except as shall have been previously agreed in ------------- writing by Investor and the Company, the Company shall not, and shall not permit any of the Subsidiaries to, 10 merge or consolidate with any entity, sell, lease, license or otherwise dispose of all or substantially all of its assets (whether now owned or hereafter acquired) to any entity or acquire all or substantially all of the assets or business of any entity in each case whether in one transaction or in a series of transactions pursuant to which the Company or such Subsidiary shall not be the surviving entity. 3.9 Survival. The covenants of the Company in this Section 3 shall, -------- --------- except to the extent they terminate by their express terms, survive the Closing in accordance with their terms and shall not be merged therein. SECTION 4. REPRESENTATIONS AND WARRANTIES OF INVESTOR. - -------------------------------------------------------- 4.1 Making of Representations and Warranties of Investor. As a material ---------------------------------------------------- inducement to the Company to enter into this Agreement and consummate the transactions contemplated hereby, Investor hereby makes the representations and warranties to the Company contained in this Section 4. --------- 4.2 Investor's Organization. Investor represents and warrants that it (a) ----------------------- is a corporation duly organized, validly existing and in good standing under the laws of New Jersey, (b) is authorized to consummate the transactions contemplated by this Agreement and under all documents contemplated hereunder to be executed by such Investor, and (c) has all the necessary corporate power to execute and deliver this Agreement and all documents contemplated hereunder to be executed by such Investor and to perform its obligations hereunder and thereunder. This Agreement and all documents contemplated hereunder to be executed by such Investor have been duly authorized by all requisite corporate action on the part of such Investor and are valid and legally binding obligations of such Investor and enforceable in accordance with their respective terms, subject to bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium and similar laws of general applicability relating to or affecting creditor's rights generally and to the general principals of equity. Neither the execution and delivery of this Agreement and all documents contemplated hereunder to be executed by such Investor nor the performance of the obligations of such Investor hereunder or thereunder will result in the violation of any provision of the operating agreement or other organizational document of such Investor or will conflict with any order or decree of any court or governmental instrumentality of any nature by which Investor is bound. 4.3 Investment Intent. Investor represents and warrants to Company that ----------------- the Shares to be acquired by it hereunder are being acquired for its own account for investment and with no intention of distributing or reselling such Shares or any part thereof or interest therein in any transaction which would be in violation of the securities laws of the United States of America or any state or any foreign country or jurisdiction. 4.4 Investor Status. Investor represents and warrants to, and covenants --------------- and agrees with, Company that (i) at the time such Investor was offered the Shares, it was, (ii) at the date hereof, it is, and (iii) at the Closing Date, it will be an "accredited investor" as defined in Rule 501 under the 11 Securities Act, and has such knowledge, sophistication and experience in business and financial matters so as to be capable of evaluating the Company and an investment in the Company, and is able to bear the economic risk of such investment. 4.5 Access to Information. Investor acknowledges as of the date hereof --------------------- that it has been afforded: (i) the opportunity to ask such questions as it has deemed necessary of, and to receive answers from, representatives of the Company concerning the terms and conditions of the offering of the Shares and the merits and risks of investing in the Company; (ii) access to information about the Company, the Company's financial condition, pro forma results of operations, business properties, management and prospects sufficient to enable it to evaluate its investment in the Shares; and (iii) the opportunity to obtain such additional information which the Company possesses or can acquire without unreasonable effort or expense that is necessary to verify the accuracy and completeness of the information contained in the SEC Documents. 4.6 Reliance. Investor also understands and acknowledges that (i) the -------- Shares may not be sold, transferred, offered for sale, pledged, hypothecated or otherwise disposed of without registration under the Securities Act, except pursuant to an exemption from such registration available under such Act, and without compliance with state, local and foreign securities laws, in each case, to the extent applicable, (ii) the Shares are being offered and sold to such Investor without registration under the Securities Act in a transaction that is exempt from the registration provisions of the Securities Act and (iii) the availability of such exception depends in part on, and that the Company and, for the purposes of the opinion to be delivered to such Investor pursuant to Section ------- 6.1(f) hereof, Wachtell, Lipton, Rosen & Katz will rely upon, the accuracy and - ------ truthfulness of the foregoing representations and Investor hereby consents to such reliance. 4.7 No Advertisement or Solicitation. Investor acknowledges that the -------------------------------- offer and sale of the Shares to it has not been accomplished by any form of general solicitation or general advertising, including, but not limited to, (i) any advertisement, article, notice or other communication published in any newspaper, magazine or similar media, or broadcast over television or radio and (ii) any seminar or meeting whose attendees have been invited by any general solicitation or general advertising. 4.8 Other Investor Representations. ------------------------------ (a) Except as listed on Schedule 4.8(a) attached hereto and --------------- incorporated herein by this reference, Investor has not received any written notice of any threatened litigation, claim condemnation, administrative proceeding, or special assessment against Investor which would have a material adverse effect on the ability of Investor to perform its obligations under this Agreement; and (b) There is no proceeding pending or to Investor's knowledge threatened by or against Investor under the United States Bankruptcy Code. 12 SECTION 5. COVENANTS OF INVESTOR. - ---------- --------------------- 5.1 Making of Covenants and Agreement. Investor hereby makes the --------------------------------- covenants and agreements set forth in this Section 5. --------- 5.2 Legends. To the extent applicable or appropriate, any Certificates ------- or other documents issued in respect of any Shares shall be endorsed with the legends set forth below, and Investor covenants that, except to the extent such restrictions are waived by the Company, such Investor shall not transfer any Shares without complying with the restrictions on transfer described in such legends: (i) "THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED, OR REGISTERED OR QUALIFIED UNDER THE SECURITIES LAWS OF ANY STATES AND MAY NOT BE SOLD, TRANSFERRED, ASSIGNED, PLEDGED, OR HYPOTHECATED ABSENT AN EFFECTIVE REGISTRATION THEREOF UNDER SUCH ACT OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO THE COMPANY WHICH OPINION IS REASONABLY SATISFACTORY IN FORM AND SUBSTANCE TO THE COMPANY AND ITS COUNSEL, TO THE EFFECT THAT SUCH REGISTRATION IS NOT REQUIRED UNDER SAID ACT OR THE SECURITIES LAWS OF SUCH STATES OR THAT SUCH TRANSACTION COMPLIES WITH THE RULES PROMULGATED BY THE SECURITIES AND EXCHANGE COMMISSION UNDER SAID ACT OR THE SECURITIES LAWS OF SUCH STATES. THIS LEGEND MAY ONLY BE REMOVED AS PROVIDED FOR IN SECTION 5.2 OF THAT CERTAIN STOCK PURCHASE AGREEMENT DATED AS OF SEPTEMBER 28, 1998 ENTERED INTO BETWEEN THE HOLDER HEREOF AND THE COMPANY. A COPY OF SAID AGREEMENT MAY BE INSPECTED AT THE OFFICES OF THE COMPANY." (ii) Any legend required by any applicable state securities law. The legends set forth above may be removed if and when the Shares represented by such certificate are disposed of pursuant to an effective registration statement under the Securities Act or upon the Company's receipt of an opinion of counsel, in form and substance and from counsel reasonably satisfactory to the Company and its counsel, confirming that any sale or transfer of such securities will not require registration of such securities under the Securities Act or under any "Blue Sky" or similar laws. 5.3 Confidentiality of Information. Subject to the Investor's ------------------------------ conditional obligations with respect to certain information provided to Investor in accordance with Section 3.3, Investor shall keep all information furnished to ----------- such Investor by the Company concerning the business and properties of the Company and other activities of the Company confidential in accordance with the terms of that certain Confidentiality Agreement, dated as of January 15, 1998, by and between the Company and Prudential, a copy of which is attached hereto as Exhibit C. - --------- 13 5.4 Consummation of Agreement. The Investor shall use its reasonable ------------------------- best efforts to perform and fulfill all conditions and obligations on its part to be performed and fulfilled under this Agreement, to the end that the transactions contemplated by this Agreement shall be fully carried out. To this end, Investor will obtain prior to the Closing (i) all necessary authorizations or approvals of the Investment Committee of its Board of Directors and (ii) all necessary authorizations, consents and permits of others required to permit the consummation by the Investor of the transactions contemplated by this Agreement. 5.5 Cooperation of Investor. The Investor shall cooperate with all ----------------------- reasonable requests of the Company and the Company's counsel in connection with the consummation of the transactions contemplated hereby. SECTION 6. CONDITIONS. - --------------------- 6.1 Conditions to the Obligations of Investor. The obligation of Investor ----------------------------------------- to consummate this Agreement and the transactions contemplated hereby are subject to the fulfillment, prior to or at the Closing, of the following conditions precedent: (a) Representations; Warranties; Covenants. Each of the -------------------------------------- representations and warranties of the Company contained in Section 2 shall be --------- true and correct in all material respects (except for such representations and warranties that are qualified by their terms as to materiality, which representations and warranties as so qualified shall be true in all respects) as of the date of this Agreement and as of the Closing Date as though made on and as of the Closing; and the Company shall, on or before the Closing, have performed all of its obligations hereunder which by the terms hereof are to be performed on or before the Closing; provided, however, that for purposes of determining compliance with this Section 6.1(a) and for purposes of Section 6.1(b), each as of the Closing Date, "Material Adverse Effect" shall mean (A) the Company or any of its Subsidiaries has: (i) made a general assignment for the benefit of creditors; (ii) filed any voluntary petition in bankruptcy or suffered the filing of any involuntary petition by such entity's creditors; (iii) suffered the appointment of a receiver to take possession of all or substantially all of such entity's assets; (iv) suffered the attachment or other judicial seizure of all, or substantially all, of such entity's assets; (v) admitted in writing such entity's inability to pay its debts as they come due; or (vi) made an offer of settlement, extension or composition to its creditors generally, or (B) the total liabilities of the Company and its consolidated subsidiaries are greater than the total assets of the Company and its consolidated subsidiaries, each as determined in accordance with generally accepted accounting principles, or (C) any combination of the foregoing. (b) No Material Change. There shall have been no change since the ------------------ date hereof, whether or not in the ordinary course of business, which has had a Material Adverse Effect, as defined in Section 6.1(a). 14 (c) Certificate from Officers. The Company shall have delivered to ------------------------- Investor a certificate of the Company's President and Chief Financial Officer dated as of the Closing to the effect that the statements set forth in paragraphs (a) and (b) above in this Section 6.1 are true and correct. ----------- (d) Registration Rights Agreement. Simultaneous with the Closing, the ----------------------------- Company and Investor shall have entered into a Registration Rights Agreement in the form attached hereto as Exhibit A. (the "REGISTRATION RIGHTS AGREEMENT"). --------- (e) Certificate of Designations. At or prior to the Closing, the --------------------------- Company shall have adopted a Certificate of Designations in the form attached hereto as Exhibit E (the "CERTIFICATE OF DESIGNATIONS") and as of the Closing, --------- such Certificate of Designations (i) shall be in full force and effect, (ii) shall not have been modified, amended, supplemented, rescinded or revoked in any way, and (iii) shall have been filed with and accepted for recording by the Secretary of State of the State of Delaware; provided, however, that if any event has occurred or any action has been taken by the Company between the date hereof and the Closing which, if the Shares had been issued on the "Closing Date" as defined in the Master Transaction Agreement, would have resulted in any benefit to the holders of the Shares (other than a "Regular Dividend" (as defined in the Certificate of Designations) but including, without limitation, any extraordinary dividend or distribution, any transaction resulting in an adjustment to the "Conversion Price" (as defined in the Certificate of Designations) or any acceleration of the convertibility of the Shares), then the ---- Certificate of Designations as adopted and filed shall be modified to provide such benefit to the holders of the Shares as if the Shares had been issued to the holders on the "Closing Date", as defined in the Master Transaction Agreement. (f) Opinions of Counsel. On the Closing Date, Investor shall have ------------------- received (i) from Wachtell, Lipton, Rosen & Katz, counsel for the Company, an opinion as of said date, in form attached hereto as Exhibit B-1, and (ii) from Goodwin, Procter & Hoar llp, an opinion as of said date, in form attached hereto as Exhibit B-2. (g) No Order or Judgments. No Governmental Entity shall have enacted, --------------------- issued, promulgated, enforced or entered any law, order, decree, injunction, judgment, ruling, assessment, writ, or executive mandate (whether temporary, preliminary or permanent) which is in effect and has the effect of making the transactions contemplated by this Agreement illegal or otherwise restraining or prohibiting the consummation of such transactions; provided, however, that from -------- ------- the date any such law, order, decree, injunction, judgment, ruling, assessment, writ, or executive mandate is binding or effective upon the Company, the Company shall use all reasonable efforts to have any such law, order, decree, injunction, judgment, ruling, assessment, writ, or executive mandate vacated. (h) Consents. The Company shall have made all filings with and -------- notifications of governmental authorities, regulatory agencies and other entities set forth on Schedule 2.8; and the ------------ 15 Company and Investor shall have received all authorizations, waivers, consents and permits set forth on Schedules 2.5 and 2.8, in form and substance reasonably ------------- --- satisfactory to Investor. (i) Waiver of Ownership Limits. The Board of Directors of the Company -------------------------- shall have duly adopted resolutions substantially in the form attached hereto as Exhibit F (the "OWNERSHIP RESOLUTIONS") and such resolutions shall be in full force and effect on the Closing Date. The Company covenants and agrees with Investor, for the benefit of Investor and its permitted transferees and subsequent transferees of the securities and interests which are the subject of the Ownership Resolutions, that upon adoption by the Board of Directors of the Ownership Resolutions, the application of the provisions of the Company's Amended and Restated Articles of Incorporation (the "CHARTER") shall be effectively modified so as to waive the Ownership Limit, as defined in the Charter, with respect to the acquisition, ownership, conversion, transfer and redemption of such securities and interests in accordance with the terms of, and subject to the limitations set forth in, the Ownership Resolutions, and that the waiver and modification effected by the Ownership Resolutions will not be subsequently modified or rescinded without the written consent of Investor. In connection with the Ownership Resolutions, Investor acknowledges that any Beneficial Ownership or Constructive Ownership by Investor or any other "Person", as defined in the Charter, in which Investor is included of Common Stock in the aggregate in excess of 9.8% of the Common Stock outstanding ("INVESTOR'S COMMON LIMIT") or of Series A Preferred Stock in the aggregate in excess of the limitation set forth in the proviso in the last sentence of the first Ownership Resolution (the "PREFERRED LIMIT") or any violation or attempted violation of such limitations shall result, as of the time of such occurrence, violation or attempted violation even if discovered after such occurrence, violation or attempted violation, in the conversion of such shares of Common Stock in excess of Investor's Common Limit Beneficially Owned or Constructively Owned by Investor or any other "Person" in which Investor is included or such shares of Series A Preferred Stock in excess of the Preferred Limit Beneficially Owned or Constructively Owned by Investor or any other "Person" in which Investor is included (but not of any other shares of Common Stock or shares of Series A Preferred Stock) into shares of Excess Stock pursuant to Section (D)(1) of Article IV of the Charter. The preceding sentence may be relied upon by the Board of Directors of the Company. Notwithstanding Section 8.1 hereof, the ----------- covenants, agreements and acknowledgments contained in this paragraph shall survive the Closing. (j) Master Transaction Agreement. On or before the Closing, all ---------------------------- transactions described in Articles 2 and 10 of the Master Transaction Agreement shall have closed or shall close in the manner and order provided in Section 10.2 of the Master Transaction Agreement. (k) Amendment to Partnership Agreement. The Partnership Agreement ---------------------------------- shall have been amended to create preferred partnership interests with economic attributes and priorities substantially identical to those of the Series A Preferred Stock and such interests shall have been issued to the Company. 16 6.2 Conditions to Obligations of the Company. The obligation of the ---------------------------------------- Company to consummate this Agreement and the transactions contemplated hereby is subject to the fulfillment, prior to or at the Closing, of the following conditions precedent: (a) Representations; Warranties; Covenants. Each of the -------------------------------------- representations and warranties of Investor contained in Section 4 shall be true --------- and correct in all material respects (except for such representations and warranties that are qualified by their terms as to materiality, which representations and warranties as so qualified shall be true in all respects) as of the date of this Agreement and as of the Closing Date as though made on and as of the Closing; and Investor shall, on or before the Closing, have performed all of its obligations hereunder which by the terms hereof are to be performed on or before the Closing. (b) No Order or Judgments. No Governmental Entity shall have enacted, --------------------- issued, promulgated, enforced or entered any law, order, decree, injunction, judgment, ruling, assessment, writ, or executive mandate (whether temporary, preliminary or permanent) which is in effect and has the effect of making the transactions contemplated by this Agreement illegal or otherwise restraining or prohibiting the consummation of such transactions; provided, however, that from -------- ------- the date any such law, order, decree, injunction, judgment, ruling, assessment, writ, or executive mandate is binding or effective upon Investor, Investor shall use all reasonable efforts to have any such law, order, decree, injunction, judgment, ruling, assessment, writ, or executive mandate vacated. (c) Master Transaction Agreement. On or before the Closing, all ---------------------------- transactions described in Articles 2 and 10 of the Master Transaction Agreement shall have closed or shall close in the manner and order provided in Section 10.2 of the Master Transaction Agreement. SECTION 7. TERMINATION OF AGREEMENT; RIGHTS TO PROCEED. - ----------------------------------------------------- 7.1 Termination. At any time prior to the Closing, this Agreement may be ----------- terminated as follows: (i) by mutual written consent of all of the parties to this Agreement; (ii) by Investor, pursuant to written notice by such Investor to the Company, if any of the conditions set forth in Section 6.1 of this ----------- Agreement have not been satisfied at or prior to the Closing Date, or if it has become reasonably and objectively certain that any of such conditions, other than a condition within the control of the Company or any Subsidiary will not be satisfied at or prior to the Closing Date, such written notice to set forth such conditions which have not been or will not be so satisfied; or (iii) by the Company, pursuant to written notice by the Company to Investor, if any of the conditions set forth in Section 6.2 of this ----------- Agreement have not been satisfied at or prior to the Closing Date, or if it has become reasonably and objectively certain that any of such conditions, other than a condition within the control of Investor, will not be 17 satisfied at or prior to the Closing Date, such written notice to set forth such conditions which have not been or will not be so satisfied. 7.2 Effect of Termination. All obligations of the parties hereunder shall --------------------- cease upon any termination pursuant to Section 7.1, provided, however, that (i) ----------- the provisions of this Section 7.2, Section 10.1 and Section 10.9 hereof shall ----------- ------------ ------------ survive any termination of this Agreement and (ii) nothing herein shall relieve any breaching party from any liability for any wilful breach of this Agreement giving rise to such termination. 7.3 Right to Proceed. Anything in this Agreement to the contrary ---------------- notwithstanding, if any of the conditions specified in Section 6.1 hereof have ----------- not been satisfied, Investor shall have the right to proceed with the transactions contemplated hereby and if any of the conditions specified in Section 6.2 hereof have not been satisfied, the Company shall have the right to - ----------- proceed with the transactions contemplated hereby; provided, however, that if -------- ------- the Company or Investor proceed with such contemplated transactions, such action shall not be deemed a waiver of any of such party's rights hereunder except to the extent that such party had actual knowledge prior to Closing of such failure of one or more conditions to such party's performance; provided further, that to ---------------- the extent any such party had actual knowledge prior to Closing of any such failure, such action shall be deemed a waiver of such party's rights hereunder with respect to such failure. SECTION 8. RIGHTS AND OBLIGATIONS SUBSEQUENT TO CLOSING. - ------------------------------------------------------ 8.1 Survival. Except to the extent expressly provided to the contrary -------- herein, each of the representations, warranties, agreements, covenants and obligations herein or in any schedule, exhibit, certificate or financial statement delivered by any party to the other party incident to the transactions contemplated hereby, shall be deemed to have been relied upon by the other party and shall survive the Closing regardless of any investigation and shall not merge in the performance of any obligation by either party hereto; provided, -------- however, that the liability of either party to this Agreement (i) with respect - ------- to the representations and warranties (excluding for purposes of this limitation the representations and warranties of the Company in Sections 2.2, 2.3, 2.4 and ------------ --- --- 2.9) made by such party herein or in any schedule, exhibit, certificate or - --- financial statement delivered by such party incident to the transactions contemplated hereby shall expire and be terminated on the second anniversary of the Closing Date and (ii) with respect to the covenants made by such party in this Agreement (other than the obligations of the Company and Investor with respect to Section 9 hereof) shall expire and be terminated upon the date which --------- is the final day of the Qualification Period. SECTION 9. INDEMNIFICATION. - --------------------------- 9.1 Indemnification by the Company. The Company agrees to indemnify and ------------------------------ hold Investor and its subsidiaries and affiliates and persons serving as officers, directors, partners, members or employees thereof harmless from and against any damages, liabilities, losses, taxes, 18 fines, penalties, costs, and expenses (including, without limitation, reasonable fees of counsel) of any kind or nature whatsoever (whether or not arising out of third-party claims and including all amounts paid in the investigation, defense or settlement of the foregoing) which may be sustained or suffered by any of them arising out of or based upon any of the following matters: (a) a deliberate or wilful breach by the Company of any of its covenants under this Agreement or in any certificate, schedule or exhibit delivered pursuant hereto; and (b) any fraud, intentional misrepresentation, other material breach of any representation, warranty or covenant of the Company under this Agreement or in any certificate, schedule or exhibit delivered pursuant hereto, or by reason of any claim, action or proceeding asserted or instituted growing out of any matter or thing constituting a material breach of such representations, warranties or covenants. 9.2 Indemnification by Investor. Investor agrees to indemnify and hold --------------------------- the Company, the Subsidiaries, and their respective affiliates and persons serving as officers, directors, partners or employees thereof harmless from and against any damages, liabilities, losses, taxes, fines, penalties, costs and expenses (including, without limitation, reasonable fees of counsel) of any kind or nature whatsoever (whether or not arising out of third-party claims and including all amounts paid in the investigation, defense or settlement of the foregoing) which may be sustained or suffered by any of them arising out of or based upon any of the following matters: (a) a deliberate or wilful breach by the Investor of any of its covenants under this Agreement or in any certificate, schedule or exhibit delivered pursuant hereto; and (b) any fraud, intentional misrepresentation, other material breach of any representation, warranty or covenant of the Investor under this Agreement or in any certificate, schedule or exhibit delivered pursuant hereto, or by reason of any claim, action or proceeding asserted or instituted growing out of any matter or thing constituting a material breach of such representations, warranties or covenants. 9.3 Notice; Defense of Claims. An indemnified party may make claims for ------------------------- indemnification hereunder by giving written notice thereof to the indemnifying party within the period in which indemnification claims can be made hereunder. If indemnification is sought for a claim or liability asserted by a third party, the indemnified party shall also give written notice thereof to the indemnifying party promptly after it receives notice of the claim or liability being asserted, but the failure to do so shall not relieve the indemnifying party from any liability except to the extent that it is prejudiced by the failure or delay in giving such notice. Such notice shall summarize the basis for the claim for indemnification and any claim or liability being asserted by a third party. Within 20 days after receiving such notice the indemnifying party shall give written notice to the indemnified party stating whether it disputes the claim for indemnification and whether it will defend against any third party claim or liability at its own cost and expense. If the indemnifying party fails to give notice that it disputes an indemnification claim within 20 days after receipt of notice thereof, 19 it shall be deemed to have accepted and agreed to the claim, which shall become immediately due and payable. The indemnifying party shall be entitled to direct the defense against a third party claim or liability with counsel selected by it (subject to the consent of the indemnified party, which consent shall not be unreasonably withheld) as long as the indemnifying party is conducting a good faith and diligent defense. The indemnified party shall at all times have the right to fully participate in the defense of a third party claim or liability at its own expense directly or through counsel; provided, however, that if the named parties to the action or proceeding include both the indemnifying party and the indemnified party and the indemnified party is advised that representation of both parties by the same counsel would be inappropriate under applicable standards of professional conduct, the indemnified party may engage separate counsel at the expense of the indemnifying party. If no such notice of intent to dispute and defend a third party claim or liability is given by the indemnifying party, or if such good faith and diligent defense is not being or ceases to be conducted by the indemnifying party, the indemnified party shall have the right, at the expense of the indemnifying party, to undertake the defense of such claim or liability (with counsel selected by the indemnified party), and to compromise or settle it, exercising reasonable business judgment. If the third party claim or liability is one that by its nature cannot be defended solely by the indemnifying party, then the indemnified party shall make available such information and assistance as the indemnifying party may reasonably request and shall cooperate with the indemnifying party in such defense, at the expense of the indemnifying party. SECTION 10. MISCELLANEOUS. - -------------------------- 10.1 Fees and Expenses. ----------------- (a) Each of the parties will bear its own expenses in connection with the negotiation and the consummation of the transactions contemplated by this Agreement, and no expenses of the Company or any Subsidiary relating in any way to the purchase and sale of the Shares hereunder and the transactions contemplated hereby, including without limitation legal, accounting or other professional expenses of the Company or any Subsidiary, shall be charged to or paid by Investor. (b) The Company will pay all costs incurred, whether at or subsequent to the Closing, in connection with the transfer of the Shares to Investor as contemplated by this Agreement, including without limitation, all transfer taxes and charges applicable to such transfer, and all costs of obtaining permits, waivers, registrations or consents with respect to any assets, rights or contracts of the Company or any Subsidiary. 10.2 Governing Law. This Agreement shall be construed under and governed ------------- by the internal laws of the state of New York without regard to its conflict of laws provisions. 10.3 Notices. Except as set forth below, all notices and other ------- communications provided for or permitted hereunder shall be in writing and shall be deemed to have been duly given if 20 delivered personally or sent by telex or telecopier, registered or certified mail (return receipt requested), postage prepaid or courier or overnight delivery service to the respective parties at the following addresses (or at such other address for any party as shall be specified by like notice, provided that notices of a change of address shall be effective only upon receipt thereof): If to the Company: Boston Properties, Inc. 8 Arlington Street Boston, Massachusetts 02116 Attn: Edward H. Linde, President Telecopy: (617) 536-4233 with a copy to: Wachtell, Lipton, Rosen & Katz 51 West 52nd Street New York, New York 10019 Attn: Adam O. Emmerich, Esq. Telecopy: (212) 403-2234 If to the Investor: The Prudential Insurance Company of America 8 Campus Drive, 4th Floor Parsippany, New Jersey 07054-4493 Attn: Robert Falzon Telecopy: (973) 683-1752 with a copy to: Goodwin, Procter & Hoar LLP 599 Lexington Avenue 40th Floor New York, New York 10022 Attn: Robert S. Insolia, Esq. Telecopy: (212) 355-3333 10.4 Entire Agreement. This Agreement, including the Schedules and ---------------- Exhibits referred to herein and the other writings specifically identified herein or contemplated hereby, is complete, reflects the entire agreement of the parties with respect to its subject matter, and supersedes all previous written or oral negotiations, commitments and writings. No promises, representations, understandings, warranties and agreements have been made by any of the parties hereto except as referred to herein or in such Schedules and Exhibits or in such other writings; and all inducements to the making of this Agreement relied upon by either party hereto have been expressed herein or in such Schedules or Exhibits or in such other writings. 10.5 Assignability; Binding Effect. The terms and conditions of this ----------------------------- Agreement shall be binding upon and enforceable by, and shall inure to the benefit of, the parties hereto and their respective successors and permitted assigns. This Agreement may not be assigned by the Company without the prior written consent of Investor. This Agreement shall only be assignable by Investor 21 to another Prudential Investor and by a Prudential Investor to another Prudential Investor. For purposes of this Agreement, "PRUDENTIAL INVESTOR" shall mean (i) Investor, (ii) any Person controlled (as such term is defined in Rule 12b-2 under the Exchange Act), directly or indirectly, by Prudential, (iii) Strategic Value Investors, LLC, Strategic Value Investors International, LLC and/or Strategic Value Investors II, LLC, (iv) any investor in Strategic Value Investors, LLC, Strategic Value Investors International, LLC and/or Strategic Value Investors II, LLC, and (v) any entity directly or indirectly owned by one or more investors in Strategic Value Investors, LLC, Strategic Value Investors International, LLC and/or Strategic Value Investors II, LLC. Nothing in this Agreement, express or implied, is intended to confer upon any party other than the parties hereto or their respective successors and assigns any rights, remedies, obligations, or liabilities under or by reason of this Agreement. 10.6 Captions and Gender. The captions in this Agreement are for ------------------- convenience only and shall not affect the construction or interpretation of any term or provision hereof. The use in this Agreement of the masculine pronoun in reference to a party hereto shall be deemed to include the feminine or neuter, as the context may require. 10.7 Execution in Counterparts. For the convenience of the parties and to ------------------------- facilitate execution, this Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which shall constitute one and the same document. 10.8 Amendments. This Agreement may not be amended or modified, nor may ---------- compliance with any condition or covenant set forth herein be waived, except by a writing duly and validly executed by each party hereto, or in the case of a waiver, the party waiving compliance. 10.9 Publicity and Disclosures. With respect to the initial public ------------------------- disclosures of the transactions contemplated by this Agreement, Investor shall have the right to review, before any filing or public announcement is made, any such filing or press releases that refer to Investor or the transaction contemplated by this Agreement. Investor shall have the right to review before filing or public announcement any subsequent public disclosures that specifically refer to this transaction or to Investor. 10.10 Consent to Jurisdiction. Each of the parties hereby consents to ----------------------- personal jurisdiction, service of process and venue in the federal or state courts of New York for any claim, suit or proceeding arising under this Agreement, or in the case of a third party claim subject to indemnification hereunder, in the court where such claim is brought. 10.11 Specific Performance. The parties agree that it would be difficult -------------------- to measure damages which might result from a breach of this Agreement by the Company and that money damages would be an inadequate remedy for such a breach. Accordingly, if there is a breach or proposed breach of any provision of this Agreement by the Company, and Investor does not elect to terminate under Section ------- 7, Investor shall be entitled, in addition to any other remedies which it may - - have, to an 22 injunction or other appropriate equitable relief to restrain such breach without having to show or prove actual damage to Investor. [THE REMAINDER OF THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK] 23 IN WITNESS WHEREOF the parties hereto have caused this Agreement to be executed as of the date set forth above by their duly authorized representatives. INVESTOR: -------- THE PRUDENTIAL INSURANCE COMPANY OF AMERICA, a New Jersey corporation By: [Signature Illegible] COMPANY: ------- BOSTON PROPERTIES, INC., a Delaware corporation By: /s/ Mortimer B. Zuckerman --------------------------------------- Name: Mortimer B. Zuckerman Title: Chairman S-1

 
                                                                   EXHIBIT 99.24


                     BOSTON PROPERTIES LIMITED PARTNERSHIP

                          CERTIFICATE OF DESIGNATIONS

              ESTABLISHING AND FIXING THE RIGHTS, LIMITATIONS AND

                  PREFERENCES OF A SERIES OF PREFERRED UNITS

     Reference is made to the Second Amended and Restated Agreement of Limited
Partnership (the "Partnership Agreement") of Boston Properties Limited
Partnership, a Delaware limited partnership (the "Partnership"), of which this
Certificate of Designations (this "Certificate") shall become a part.
Capitalized terms used herein and not defined herein have the meanings ascribed
thereto in the main part of the Partnership Agreement.  Section references are
(unless otherwise specified) references to sections in this Certificate.

     WHEREAS, Section 14.1.B(3) of the main part of the Partnership Agreement
permits the General Partner, without the consent of the Limited Partners, to
amend the Partnership Agreement for the purpose of setting forth and reflecting
in the Partnership Agreement the designations, rights, powers, duties, and
preferences of holders of any additional Partnership Interests issued pursuant
to Section 4.2.A of the main part of the Partnership Agreement; and

     WHEREAS, the General Partner desires by this Certificate to so amend the
Partnership Agreement as of this 12th day of November, 1998 (the "Closing
Date").

     NOW, THEREFORE, the General Partner has set forth in this Certificate the
following description of the preferences and other rights, voting powers,
restrictions, limitations as to distributions, qualifications and terms and
conditions of conversion and redemption of a class and series of Partnership
Interest to be represented by Partnership Units which shall be referred to as
"Series Two Preferred Units":

(1)  Designation and Number.  A series of Preferred Units, designated the
     ----------------------                                              
     "Series Two Preferred Units," is hereby established.

(2)  Definitions.  For purposes of this Certificate of Designations, the
     -----------                                                        
     following terms shall have the meanings indicated:

     "Cash Business Combination" means a Transaction in which the fair market
     value of the aggregate consideration into which

 
     the outstanding Common Units are or will be exchanged or converted, or
     which the holders of such Units will be entitled to receive, consists of
     60% or more cash. In determining whether a Transaction is a Cash Business
     Combination, the following will apply: (a) if elections for the type of
     consideration may be made by the holders of Common Units and cash is one of
     the types of elections that may be made, it will be assumed that all
     holders of Common Units elect or will elect cash, (b) the determination
     shall be made in good faith by the General Partner, based on the fair
     market values of the consideration to be issued in the Transaction as of
     the date the definitive merger or other agreement relating thereto is
     entered into, and (c) if any of the consideration to be issued in the
     Transaction is a publicly traded security, the fair market value of that
     security shall be the Current Market Price of such security as of the date
     the definitive merger or other agreement relating thereto is entered into.

     "Closing Date" shall have the meaning set forth in the recitals above.

     "Conversion Price" shall mean the conversion price per Common Unit for
     which the Series Two Preferred Units are convertible, as such Conversion
     Price may be adjusted pursuant to Section 7 hereof. The initial Conversion
     Price shall be $38.10 per REIT Share.

     "Conversion Date" shall have the meaning set forth in paragraph (d) of
     Section 7 hereof.

     "Conversion Period" shall have the meaning set forth in paragraph (a) of
     Section 7 hereof.

     "Conversion Right" shall have the meaning set forth in paragraph (a) of
     Section 7 hereof.

     "Current Market Price" of a REIT Share or of a publicly traded security 
     of any other issuer for any day shall mean the last reported sales price,
     regular way, on such day, or, if no sale takes place on such day, the
     average of the reported closing bid and asked prices on such day, regular
     way, in either case as reported on the New York Stock Exchange ("NYSE") or,
     if such security is not listed or admitted for trading on the NYSE, on the
     principal national securities exchange on which such security is listed or
     admitted for trading or, if not listed or admitted for trading on any
     national securities exchange, on the Nasdaq National Market or, if such
     security is not quoted on such Nasdaq National Market, the average of the
     closing bid and asked prices on such day in the over-the-counter market as

                                      -2-

 
     reported by Nasdaq or, if bid and asked prices for such security on such
     day shall not have been reported through Nasdaq, the average of the bid and
     asked prices on such day as furnished by any NYSE member firm regularly
     making a market in such security selected for such purpose by the Chief
     Executive Officer of the Partnership or the General Partner.  "Current
     Market Price" of a Common Unit as of any day means the Current Market Price
     of a REIT Share multiplied by the Conversion Factor, as such term is
     defined in the main part of the Partnership Agreement.

     "Distribution Payment Date" shall mean the fifteenth day of February, May,
     August and November, in each year, commencing on November 16, 1998;
     provided, however, that if any Distribution Payment Date falls on any day
     other than a Business Day, the distribution payment due on such
     Distribution Payment Date shall be paid on the first Business Day
     immediately following such Distribution Payment Date.

     "Distribution Periods" shall mean quarterly distribution periods from and
     after a Distribution Payment Date and to and excluding the next succeeding
     Distribution Payment Date (other than the initial Distribution Period,
     which shall commence on the day after the Closing Date and end on and
     exclude November 16, 1998).

     "Fair Market Value" shall mean the average of the daily Current Market
     Prices per REIT Share during the ten (10) consecutive Trading Days selected
     by the Partnership commencing not more than 20 Trading Days before, and
     ending not later than, the earlier of the day in question and the day
     before the "ex" date with respect to the issuance or distribution requiring
     such computation. The term "`ex' date," when used with respect to any
     issuance or distribution, means the first day on which REIT Shares trade
     regular way, without the right to receive such issuance or distribution, on
     the exchange or in the market, as the case may be, used to determine that
     day's Current Market Price.

     "Forced Conversion" has the meaning set forth in Section 7(b) hereof.

     "Forced Conversion Amount" shall mean the number of Series Two Preferred
     Units which the General Partner may require to be converted as provided in
     paragraph 7(b);

     "Forced Conversion Option" shall have the meaning set forth in paragraph
     (b) of Section 7 hereof.

                                      -3-

 
     "Issue Date" shall mean, with respect to a Series Two Preferred Unit, the
     day after the Closing Date.

     "Junior Preferred Units" shall mean any class or series of Partnership
     Units the holders of which are entitled to the receipt of distributions or
     of amounts distributable upon liquidation, dissolution or winding up, as
     the case may be, junior in priority to the holders of the Series Two
     Preferred Units, but senior in priority to the holders of Common Units.

     "Junior Units" shall mean the Common Units and any other class or series of
     Partnership Units constituting junior units within the meaning set forth in
     paragraph (a) of Section 9 hereof.

     "Liquidation Preference" shall have the meaning set forth in paragraph (a)
     of Section 4 hereof.

     "Option Strike Date" shall have the meaning set forth in paragraph (a) of
     Section 5 hereof.

     "Parity Units" shall have the meaning set forth in paragraph (b) of Section
     9 hereof.

     "Preferred Rate" shall mean, at any given time, the rate per annum as to
     which distributions accrue on each Series Two Preferred Unit, based on the
     Liquidation Preference, for purposes of determining the Stated Quarterly
     Distribution in effect at such time, as set forth in the following
     schedule:


     Time Period                                      Preferred Rate
     -----------                                      --------------

     November 12, 1998 to March 31, 1999                   5.0%
     April 1, 1999 to December 31, 1999                    5.5%
     January 1, 2000 to December 31, 2000                  5.625%
     January 1, 2001 to December 31, 2001                  6.0%
     January 1, 2002 to December 31, 2002                  6.5%
     January 1, 2003 to May 12, 2009                       7.0%
     May 13, 2009 and thereafter                           6.0%

     "Ratchet Distribution" shall mean for each Distribution Payment Date a
     distribution payable, if applicable, per Series Two Preferred Unit in
     respect of the Distribution Period ending on such Distribution Payment
     Date.  The Ratchet Distribution for each Distribution Period shall be equal
     to the distribution which would have been paid in respect of such Series
     Two Preferred Unit had (i) such Series Two Preferred Unit been converted
     into (x) a number of Common Units determined by dividing the Liquidation
     Preference by the Conversion Price in effect on such Distribution Payment
     Date and any (y) Other Securities (as defined below) issuable upon such
     conversion and (ii) there

                                      -4-

 
     had been paid in respect of each such Common Unit and Other Securities
     (including any fractional portion thereof to the fourth decimal) a
     distribution (the "Regular Distribution") equal to the regular, quarterly
     cash distribution paid to holders of record of Common Units and Other
     Securities on that record date (the "Reference Record Date") which is
     closest to the end of the calendar quarter preceding such Distribution
     Payment Date. For purposes of determining the Ratchet Distribution, in the
     event that a special cash distribution was paid to holders of Common Units
     and Other Securities on the Reference Record Date or at any time prior to
     the Reference Record Date and after the last record date for regular,
     quarterly cash distributions, then in such event the Ratchet Distribution
     shall include, in addition to the Regular Distribution paid in respect of
     the Reference Record Date, the amount of such special cash distribution
     paid in respect of each Common Unit or Other Security (for clarity, it is
     noted that the effect of this sentence is to assure that in calculating the
     Ratchet Distribution the holders of Series Two Preferred Units will benefit
     from any cash distributions paid in respect of Common Units and Other
     Securities even if such cash distributions might not be characterized as
     "regular, quarterly cash distributions"). In the event that a Series Two
     Preferred Unit is outstanding for only a portion of a Distribution Period,
     then the Ratchet Distribution with respect to such Series Two Preferred
     Unit and such Distribution Period shall be determined as provided in the
     preceding sentence but shall then be adjusted by multiplying such amount by
     a fraction, the numerator of which equals the number of days such Series
     Two Preferred Unit had been outstanding during such period and the
     denominator of which shall equal the total number of days during such
     Distribution Period. As used herein, the term "Other Security" means any
     security in addition to Common Units (including Junior Preferred Units)
     which may be issuable to a holder of Series Two Preferred Units upon
     conversion of a Series Two Preferred Unit.
 
     "Redemption Notice" shall have the meaning set forth in paragraph (b) of
     Section 5 hereof.

     "Redemption Right" shall have the meaning set forth in paragraph (a) of
     Section 5 hereof.

     "Securities" shall have the meaning set forth in paragraph (g)(iii) of
     Section 7 hereof.

     "Source Agreements" shall mean that certain Master Transaction Agreement
     dated September 28, 1998 by and among the General Partner, the Partnership
     and, among others, the

                                      -5-

 
     holders of the Series Two Preferred Units designated hereby, and each of
     the other agreements contemplated therein.

     "Stated Quarterly Distribution" shall mean for each Distribution Payment
     Date a distribution payable, if applicable, per each Series Two Preferred
     Unit in respect of the Distribution Period ending on such Distribution
     Payment Date. The Stated Quarterly Distribution for each Distribution
     Period shall equal the sum of the following products for each day in such
     Distribution Period on which the Series Two Preferred Unit is outstanding:
     (i) the Preferred Rate in effect on such day divided by 365, multiplied by
     (ii) the Liquidation Preference.

     "Target Amount" shall mean that number of Series Two Preferred Units having
     a Liquidation Preference equal to one-sixth of the aggregate Liquidation
     Preference of the Series Two Preferred Units issued under the Source
     Agreements.

     "Trading Day" shall mean any day on which the securities in question are
     traded on the New York Stock Exchange ("NYSE"), or if such securities are
     not listed or admitted for trading on the NYSE, on the principal national
     securities exchange on which such securities are listed or admitted, or if
     not listed or admitted for trading on any national securities exchange, on
     the Nasdaq National Market, or if such securities are not quoted on such
     Nasdaq National Market, in the applicable securities market in which the
     securities are traded.

     "Transaction" shall have the meaning set forth in paragraph (h) of Section
     7 hereof.

(3)  Distributions.
     -------------
 
     (a)  The holders of Series Two Preferred Units shall be entitled to 
          receive, in respect of each Distribution Payment Date, when, as and
          if authorized and declared by the General Partner out of assets
          legally available for that purpose, cumulative preferential
          distributions payable in cash in an amount per Series Two Preferred
          Unit equal to the greater of (i) the Stated Quarterly Distribution for
          such Distribution Payment Date or (ii) the Ratchet Distribution for
          such Distribution Payment Date. Such distributions shall, with respect
          to each Series Two Preferred Unit, be cumulative from and including
          its Issue Date, whether or not in, or with respect to, any
          Distribution Period or Periods (i) such distributions are declared,
          (ii) the Partnership is contractually prohibited from paying such
          distributions

                                      -6-

 
          or (iii) there shall be assets of the Partnership legally available
          for the payment of such distributions, and shall be payable quarterly,
          when, as and if authorized and declared by the General Partner, in
          arrears on Distribution Payment Dates, commencing on the first
          Distribution Payment Date after the Issue Date of such Series Two
          Preferred Units. Distributions are cumulative from the most recent
          Distribution Payment Date to which distributions have been paid,
          whether or not, or with respect to, in any Distribution Period or
          Periods (i) such distributions are declared, (ii) the Partnership is
          contractually prohibited from paying such distributions or (iii) there
          shall be assets legally available therefor. Each such distribution
          shall be payable in arrears to the holders of record of the Series Two
          Preferred Units, as they appear on the records of the Partnership at
          the close of business on such record dates, not more than 30 days
          preceding the applicable Distribution Payment Date (the "Distribution
          Payment Record Date") (or, in the case of a Distribution Payment
          Record Date that coincides with a record date for payment of
          distributions on Common Units, not more than 60 days preceding the
          applicable Distribution Payment Date), as shall be fixed by the
          General Partner; provided, however, that with respect to the first
          Distribution Period, the Distribution Payment Record Date for such
          period will be on or after the Issue Date. Accrued and unpaid
          distributions for any past Distribution Periods and any additional
          amounts as provided in subsection (f) may be authorized and declared
          and paid at any time, without reference to any regular Distribution
          Payment Date, to holders of record on such date, not exceeding 45 days
          preceding the payment date thereof (or, in the case of a record date
          that coincides with a record date for payment of distributions on
          Common Units, not more than 60 days preceding the applicable payment
          date thereof), as may be fixed by the General Partner.

     (b)  The first Distribution Period with respect to the first Series Two
          Preferred Units issued shall be for the period from on and after the
          Closing Date to the first Distribution Payment Date of (and excluding)
          November 16, 1998.

     (c)  So long as any Series Two Preferred Units are outstanding, no 
          distributions (whether in cash or in kind or upon liquidation of the
          Partnership), except as described in the immediately following
          sentence, shall be authorized and declared or paid on any series or
          class or classes of Parity Units for any period nor

                                      -7-

 
          shall any Parity Units be redeemed, purchased or otherwise acquired
          for any consideration or any moneys to be paid to or made available
          for a sinking fund for the redemption of any Parity Units, directly or
          indirectly (except by conversion into or exchange for Parity Units or
          Junior Units), unless full cumulative distributions, including, if
          applicable, the further preferential distribution provided in
          subsection (f), have been or contemporaneously are authorized and
          declared and paid on the Series Two Preferred Units for all
          Distribution Periods terminating on or prior to the distribution
          payment date on (or date of purchase, redemption or other acquisition
          of) such class or series of Parity Units. When distributions are not
          paid in full upon the Series Two Preferred Units and any other class
          or classes of Parity Units, all distributions authorized upon the
          Series Two Preferred Units and any other class or classes of Parity
          Units shall be authorized and declared ratably in proportion to the
          respective amounts of distributions accumulated and unpaid on the
          Series Two Preferred Units and such Parity Units (which shall not
          include any accrual in respect of unpaid distributions for prior
          distribution periods if such Parity Units do not have a cumulative
          distribution).

     (d)  So long as any Series Two Preferred Units are outstanding, no 
          distributions (other than distributions paid solely in Junior Units,
          or options, warrants or rights to subscribe for or purchase Junior
          Units) shall be authorized and declared or paid or other distribution
          authorized and declared or made upon Junior Units for any period, nor
          shall any Junior Units be redeemed, purchased or otherwise acquired
          (other than a redemption, purchase or other acquisition of Common
          Units made for purposes of and in compliance with requirements of
          employee incentive or employee benefit plans of the Partnership or the
          General Partner or any of their subsidiaries), for any consideration
          (or any moneys to be paid to or made available for a sinking fund for
          the redemption of any Junior Units) by the Partnership, directly or
          indirectly (except by conversion into or exchange for Junior Units),
          unless in each case (i) the full cumulative distributions on all
          outstanding Series Two Preferred Units, including, if applicable, the
          further preferential distribution provided in subsection (f), and any
          other Parity Units of the Partnership shall have been paid for all
          past Distribution Periods with respect to the Series Two Preferred
          Units and all past distribution periods with respect to such Parity
          Units and (ii) sufficient funds

                                      -8-

 
          shall have been paid for or irrevocably set aside and designated for
          payment of the distribution due for the current Distribution Period
          with respect to the Series Two Preferred Units.

     (e)  Without limiting the other provisions hereof, no distributions on 
          Series Two Preferred Units (other than liquidating distributions made
          in accordance with Section 13.2 of the main part of the Partnership
          Agreement and Section 4 hereof) shall be paid by the Partnership at
          such time as the terms and provisions of any agreement of the
          Partnership or its affiliates or subsidiaries, relating to bona fide
          indebtedness for borrowed money, prohibits such declaration or payment
          or provides that such declaration or payment would constitute a breach
          thereof or a default thereunder, or if such declaration or payment
          shall be restricted or prohibited by law (and such failure to pay
          distributions on the Series Two Preferred Units shall prohibit other
          distributions by the Partnership as described in Sections 3(c) and
          (d)).

     (f)  Notwithstanding the foregoing, distributions on the Series Two 
          Preferred Units shall accrue whether or not the terms and provisions
          set forth in Section 3(e) hereof at any time prohibit the current
          payment of distributions, whether or not the Partnership has earnings,
          whether or not there are funds legally available for the payment of
          such distributions and whether or not such distributions are declared.
          Accrued but unpaid distributions on the Series Two Preferred Units
          will accumulate as of the Distribution Payment Date on which they
          first become payable and a further preferential distribution at the
          per annum rate then applicable for the period or periods specified in
          subsection (a) above shall accrue during the period of accumulation
          and be distributed in respect of such unpaid distributions until the
          amount thereof and the further preferential amount thereon shall have
          been distributed in full.

     (g)  Upon liquidation, dissolution or winding up of the Partnership, no
          distributions shall be made to any series or class or classes of
          Junior Units until after payment shall have been made in full to the
          holders of the Series Two Preferred Units, as provided in Section
          4(a).

     (h)  Any distribution made on the Series Two Preferred Units shall first be
          credited against the further preferential distribution provided in
          subsection (f)

                                      -9-

 
          above and then against the earliest accrued but unpaid distribution
          due with respect to such Series Two Preferred Units which remains
          payable. Other than liquidating distributions described in Section 4,
          the Series Two Preferred Units shall be entitled only to the
          distributions on the Series Two Preferred Units as described in this
          Section 3.


(4)  Liquidation Preference.
     ----------------------
 
     (a)  In the event of any liquidation, dissolution or winding up of the
          Partnership, whether voluntary or involuntary, before any payment or
          distribution of the assets of the Partnership (whether capital or
          surplus) shall be made to the holders of Junior Units, the holders of
          the Series Two Preferred Units shall be entitled to receive Fifty
          Dollars ($50.00) per Series Two Preferred Unit (the "Liquidation
          Preference") or, if greater, the amount which each holder would
          receive in respect of the Common Units and Other Securities and
          property it would receive upon conversion of its Series Two Preferred
          Units if all Series Two Preferred Units were converted pursuant to
          Section 7 immediately prior to the distribution of liquidation
          proceeds under the Partnership Agreement, plus an amount equal to all
          distributions (whether or not earned or declared) accrued and unpaid
          thereon pursuant to Section 3 to the date of final distribution to
          such holder; but such holders of Series Two Preferred Units shall not
          be entitled to any further payment. If, upon any such liquidation,
          dissolution or winding up of the Partnership, the assets of the
          Partnership, or proceeds thereof, distributable among the holders of
          Series Two Preferred Units shall be insufficient to pay in full the
          preferential amount aforesaid and liquidating payments on any other
          Parity Units, then such assets, or the proceeds thereof, shall be
          distributed among the holders of such Series Two Preferred Units and
          any such other Parity Units ratably in accordance with the respective
          amounts that would be payable on such Series Two Preferred Units and
          any such other Parity Units if all amounts payable thereon were paid
          in full.

     (b)  Upon any liquidation, dissolution or winding up of the Partnership, 
          after payment shall have been made in full to the holders of the
          Series Two Preferred Units and Parity Units, as provided in this
          Section 4, any series or class or classes of Junior Units shall,
          subject to any respective terms and provisions applying thereto, be
          entitled to receive any and all assets remaining to be paid or
          distributed.

                                      -10-

 
     (c)  After payment of the full amount of the liquidating distributions to
          which they are entitled pursuant to Sections 4(a) and (b), the holders
          of Series Two Preferred Units will have no right or claim to any of
          the remaining assets of the Partnership.

     (d)  The consolidation or merger of the Partnership with or into any other
          corporation, partnership, trust or entity or of any other corporation,
          partnership, trust or entity with or into the Partnership, or an
          exchange of Units or partnership interests, or the sale, lease or
          conveyance of all or substantially all of the property or business of
          the Partnership (unless the net proceeds of any of the foregoing
          transactions shall be distributed to the holders of Units rather than
          reinvested), shall not be deemed to constitute a liquidation,
          dissolution or winding up of the Partnership.


(5)  Redemption.
     ---------- 

     (a)  Subject to adjustment as provided in this Section 5, on each of May
          12, 2009; May 12, 2010; May 12, 2011; May 14, 2012; May 14, 2013; and
          May 12, 2014 (each an "Option Strike Date") (i) each of the Series Two
          Preferred Unit holders, upon giving prior written notice as provided
          below, shall have the right (the "Redemption Right") to require that
          the Partnership redeem for cash, at a redemption price of $50 per
          Series Two Preferred Unit, Series Two Preferred Units held by such
          holder; provided that the maximum number of Series Two Preferred Units
          that may be required to be redeemed from all such holders is equal to
          the Target Amount; provided, further, that a holder may not exercise
          the Redemption Right for less than one thousand (1,000) Series Two
          Preferred Units or, if such holder holds less than one thousand Series
          Two Preferred Units, all of the Series Two Preferred Units held by
          such holder; and (ii) the General Partner, upon giving prior written
          notice as provided below, shall have the Redemption Right to require
          the redemption for cash, at a redemption price of $50 per Series Two
          Preferred Unit, of a number of Series Two Preferred Units equal to,
          but not in excess of, the Target Amount (in the aggregate from all
          holders); provided, however, that the General Partner may not require
          the redemption by the Partnership on any Option Strike Date of more
          than the lesser of (A) the Target Amount in respect of such Option
          Strike Date or (B) such number of Series Two Preferred Units as shall
          have an aggregate

                                      -11-

 
          Liquidation Preference equal to the excess of (i) the aggregate
          Liquidation Preference of the sum of the Target Amounts for all prior
          Option Strike Dates and the currently applicable Option Strike Date
          over (ii) the aggregate Liquidation Preference of all Series Two
          Preferred Units previously converted (including Forced Conversions),
          noticed for conversion on such Option Strike Date, previously
          redeemed, and noticed for redemption on such Option Strike Date.

          The exercise of a Redemption Right on any Option Strike Date shall not
          be cumulative (i.e., the Target Amount with respect to any Option
          Strike Date is the maximum number of Series Two Preferred Units
          subject to mandatory redemption by either the Partnership or the
          holders of Series Two Preferred Units on each Option Strike Date); any
          Series Two Preferred Units that are not converted pursuant to Section
          7 or redeemed pursuant to this Section 5 on or before May 12, 2014
          shall remain outstanding and shall have all of the rights and
          preferences set forth in this Certificate except that the provisions
          of this Section 5 shall not apply to any Series Two Preferred Units
          outstanding after such date.

     (b)  In order to exercise its Redemption Right, a holder of Series Two 
          Preferred Units shall deliver a notice (a "Redemption Notice," such
          term to also include the notice required to be delivered by the
          General Partner upon exercise of its Redemption Right) in the form
          attached hereto as Exhibit B to the Partnership (with a copy to the
          General Partner) not less than 40 nor more than 70 days prior to an
          Option Strike Date. If a holder of Series Two Preferred Units who has
          delivered a Redemption Notice pursuant to this Section 5 converts the
          Units tendered for redemption prior to the redemption date, the
          Redemption Notice shall be deemed revoked. The General Partner may
          exercise its Redemption Right by delivering in writing a Redemption
          Notice, containing the information provided in subsection (e), to each
          holder of record of Series Two Preferred Units, not less than 30 nor
          more than 70 days prior to an Option Strike Date.

          If, pursuant to the exercise of a Redemption Right by holders of the
          Series Two Preferred Units, with such redemption to be effective on an
          Option Strike Date, holders tender for redemption a number of Series
          Two Preferred Units having an aggregate Liquidation Preference greater
          than the Target Amount, the Partnership may redeem all such Units
          tendered for

                                      -12-

 
          redemption or a lesser number of Units, as the General Partner
          determines in its sole discretion, but not less than the Target
          Amount; provided, however, that if the Partnership does not redeem all
          Series Two Preferred Units so tendered for redemption, the Partnership
          shall redeem Units ratably from each tendering holder in proportion to
          the respective number of Units tendered. If the holders have tendered
          for redemption a number of Series Two Preferred Units of less than the
          Target Amount and the General Partner delivers a Redemption Notice to
          redeem a number of Series Two Preferred Units greater than the number
          of Units tendered for redemption by the holders, the Partnership shall
          first redeem the Series Two Preferred Units of those holders
          exercising their Redemption Right pursuant to this Section 5 and shall
          then redeem, on a pro rata basis, Series Two Preferred Units from all
          holders who hold Units after giving effect to such redemption;
          provided, however, that in such case, (i) the General Partner shall
          deliver a separate notice at least 30 days prior to the Option Strike
          Date, containing the information provided in subsection (e), to all
          holders of the Series Two Preferred Units to be so redeemed indicating
          the number of Units to be so redeemed, and (ii) the total number of
          Units to be redeemed (upon notice by the General Partner and the
          holders, collectively) shall not exceed the Target Amount.

          If the General Partner delivers a Redemption Notice to the holders of
          the Series Two Preferred Units, the holders shall have the right,
          subject to Section 7(a), to convert their Series Two Preferred Units
          into Common Units, pursuant to Section 7, on or before the Option
          Strike Date. To the extent that such Series Two Preferred Units are so
          converted, the right of the General Partner to require the redemption
          of Series Two Preferred Units shall be reduced by the aggregate
          Liquidation Preference of the Series Two Preferred Units so converted
          (and the reduction in the number of Series Two Preferred Units to be
          redeemed from each holder shall be allocated first to the holders who
          so elected to convert their Units and second pro rata among all other
          holders).

          Within two Business Days of a redemption of Series Two Preferred
          Units, the Partnership shall pay the redemption price by certified
          check to or on the order of those holders whose Series Two Preferred
          Units have been redeemed.

                                      -13-

 
     (c)  Immediately prior to any redemption of Series Two Preferred Units and
          as a condition to such redemption, the Partnership shall pay, in cash,
          all accumulated and unpaid distributions, including the further
          preferential distribution provided in Section 3(f), through the Option
          Strike Date in respect of all Series Two Preferred Units, including
          those Series Two Preferred Units to be redeemed. Unless full
          cumulative distributions on all Series Two Preferred Units have been
          paid, the Partnership may not require the Series Two Preferred Units
          to be redeemed.

     (d)  The Assignee of any Limited Partner pursuant to Section 11 of the
          main part of the Partnership Agreement may exercise the rights of such
          Limited Partner pursuant to this Section 5, and such Limited Partner
          shall be deemed to have assigned such rights to such Assignee and
          shall be bound by the exercise of such rights by the Assignee. In
          connection with any exercise of such rights by an Assignee of a
          Limited Partner, the cash amount shall be paid by the Partnership
          directly to such Assignee and not to such Limited Partner.

     (e)  A Redemption Notice shall be provided in the manner provided in 
          Section 12. Any defect in a Redemption Notice or in the mailing
          thereof, to any particular holder, the Partnership or the General
          Partner shall not affect the sufficiency of the notice or the validity
          of the proceedings for redemption with respect to the other holders.
          Any notice that was mailed in the manner herein provided shall be
          conclusively presumed to have been duly given on the date of deemed
          delivery provided in Section 12, whether or not the holder receives
          the notice. Each of the General Partner's Redemption Notices shall
          state, as appropriate: (1) the Option Strike Date; (2) the number of
          Series Two Preferred Units to be redeemed in the aggregate from all
          holders and, if fewer than all the Series Two Preferred Units held by
          such holder are to be redeemed, the number of such Series Two
          Preferred Units to be redeemed from such holder; and (3) that
          distributions on the Series Two Preferred Units to be redeemed shall
          cease to accrue on such Option Strike Date except as otherwise
          provided herein. Notice having been delivered as aforesaid, from and
          after the Option Strike Date (unless the Partnership shall fail to pay
          the redemption price on the date required), (i) except as otherwise
          provided herein, distributions on the Series Two Preferred Units so
          called for redemption shall cease to accrue, (ii) said Units shall no
          longer be deemed to be outstanding, and all rights of the

                                      -14-

 
          holders thereof as holders of Series Two Preferred Units of the
          Partnership shall cease (except the right to receive the redemption
          price and the amounts required to be paid under subsection (c)).

          After the redemption of Series Two Preferred Units as aforesaid, the
          Partnership shall deliver to such holder, upon his written request, a
          certificate of the General Partner certifying the number of Common
          Units and Series Two Preferred Units held by such person immediately
          after such redemption. The Partnership shall also advise each holder
          as to the number of Series Two Preferred Units redeemed and the number
          of Series Two Preferred Units which remain outstanding.

     (f)  Each Series Two Preferred Unit holder covenants and agrees with the
          Partnership that all Series Two Preferred Units delivered for
          redemption pursuant to this Section 5 shall be delivered to the
          Partnership free and clear of all liens, and, notwithstanding anything
          contained herein to the contrary, the Partnership shall not be under
          any obligation to acquire Series Two Preferred Units which are or may
          be subject to any liens.

(6)  The rights of each Series Two Preferred Unit holder pursuant to this
     Certificate arise solely from its ownership as a Limited Partner of
     Partnership Interests in the Partnership and not from it being a creditor
     of the Partnership and none of such rights with respect to any required
     redemption shall constitute a "claim" as such term is defined in Section
     101 of the United States Bankruptcy Code as in effect as of the date of
     this Certificate; provided, however, that any rights in respect of such
     Series Two Preferred Units shall constitute equity interests of each
     Partner hereunder, it being agreed and understood that no Partner is
     waiving any equity interest it has in the Partnership or any rights to
     assert any such interests in any bankruptcy proceeding or otherwise.

(7)  Conversion.  Holders of the Series Two Preferred Units shall have the right
     ----------                                                                 
     (the "Conversion Right") to convert all or a portion of such Units into
     Common Units (provided, however, that a holder may not exercise the
     Conversion Right for less than one thousand (1,000) Series Two Preferred
     Units or, if such holder holds less than one thousand Series Two Preferred
     Units, all of the Series Two Preferred Units held by such holder), and the
     General Partner shall have the right on each Option Strike Date to cause a
     conversion of Series Two Preferred Units into Common Units, subject, in
     each case, to the following conditions and procedures:

                                      -15-

 
     (a)  Subject to and upon compliance with the provisions of this Section 7,
          a holder of Series Two Preferred Units shall have the right, at his or
          her option, at any time and from time to time during the period on or
          after the earlier of (i) December 31, 2002, and (ii) the effective
          time of a Cash Business Combination (the period beginning on and after
          the earlier of such dates, the "Conversion Period"), to convert such
          Units into the number of fully paid and non-assessable Common Units
          obtained by dividing the aggregate Liquidation Preference of such
          Series Two Preferred Units by the Conversion Price as in effect as of
          such time (i.e. after adjustment as described in subsection (g)) by
          delivering a Conversion Notice in the form attached hereto as Exhibit
          A within the time period specified in paragraph (d) below and in the
          manner provided in Section 12; provided, however, that the right to
          deliver a conversion notice with respect to Series Two Preferred Units
          called or tendered for redemption pursuant to Section 5 hereof shall
          terminate on that day which is the fifth business day prior to the
          applicable Option Strike Date on which such Units are to be redeemed,
          unless the Partnership shall default in making any cash payment
          required upon a redemption on such date as provided in Section 5
          hereof. A conversion of Series Two Preferred Units specified in the
          Conversion Notice shall occur automatically at the close of business
          on the applicable Conversion Date without any action on the part of
          the holders of Series Two Preferred Units, and immediately after the
          close of business on the Conversion Date the holders of Series Two
          Preferred Units who had all or a portion of their Series Two Preferred
          Units converted shall be credited on the books and records of the
          Partnership with the issuance as of the opening of business on the
          next day of the Common Units issuable upon such conversion.

     (b)  If, as of an applicable Option Strike Date, the Target Amount for such
          Option Strike Date has not been redeemed and/or converted (or noticed
          for conversion and/or redemption on such Option Strike Date) as a
          result of Series Two Preferred Unit holders and/or the General Partner
          exercising Redemption Rights pursuant to Section 5 and/or such holders
          exercising their conversion rights pursuant to this Section 7, the
          Partnership, at the election of the General Partner and subject to and
          upon compliance with the provisions of this Section 7, may convert (a
          "Forced Conversion") not more than the lesser of (A) the Target Amount
          in

                                      -16-

 
          respect of such Option Strike Date or (B) such number of Series Two
          Preferred Units as shall have an aggregate Liquidation Preference
          equal to the excess of (i) the aggregate Liquidation Preference of the
          sum of the Target Amounts for all prior Option Strike Dates and the
          currently applicable Option Strike Date over (ii) the aggregate
          Liquidation Preference of all Series Two Preferred Units previously
          converted, noticed for conversion by the holders on such Option Strike
          Date, previously redeemed, and noticed for redemption on such Option
          Strike Date (the "Forced Conversion Amount") of Series Two Preferred
          Units into a number of Common Units determined in accordance with the
          Conversion Price in effect on such date as determined in accordance
          with subsection (a) by transmitting for delivery a Conversion Notice,
          in the manner prescribed in Section 12 within one business day after
          the applicable Option Strike Date, to the holders of the Series Two
          Preferred Units which are to be so converted (the "Forced Conversion
          Option") ratably in proportion to the Series Two Preferred Units then
          outstanding from the holders thereof (after giving effect to the
          redemptions and conversions otherwise noticed to occur on such Option
          Strike Date); provided, further, however, that such Forced Conversion
          Option may only be exercised by the Partnership if the value of the
          REIT Shares, calculated on their weighted average closing price during
          the 10 Trading Days prior to the second Trading Day preceding the
          exercise of the Forced Conversion Option, is equal to or greater than
          110% of the Conversion Price.

     (c)  Immediately prior to any conversion of Series Two Preferred Units, the
          Partnership shall pay, in cash, all accumulated and unpaid
          distributions including the further preferential distributions
          provided in Section 3(f) through the Conversion Date on all Series Two
          Preferred Units. A holder of Series Two Preferred Units shall have no
          right with respect to any Series Two Preferred Units so converted to
          receive any distributions paid after the Conversion Date with respect
          to such Series Two Preferred Units and his interest in the Partnership
          as to such converted Units shall be terminated; provided, however,
          that in the event the Partnership is legally or contractually
          prohibited from paying, or fails for any other reason to pay, such
          accumulated and unpaid distributions prior to any conversion and such
          holder elects to continue with and permit such conversion after notice
          from the Partnership of such inability or failure, such holder shall
          still be entitled to receive all such accumulated

                                      -17-

 
          and unpaid distributions, if any, that remain unpaid after such
          conversion, as well as a further preferential distribution on such
          unpaid distributions as provided in Section 3(f), which distributions
          shall be paid by the Partnership as soon as it is legally and
          contractually permitted to do so.

     (d)  After the conversion of Series Two Preferred Units as aforesaid, the
          Partnership shall deliver to such holder, upon his written request, a
          certificate of the General Partner certifying the number of Common
          Units and Preferred Units held by such person immediately after such
          conversion.

          Each conversion shall be deemed to have been effected immediately 
          prior to the close of business on the date (the "Conversion Date")
          specified in the Conversion Notice (which shall not be earlier than 5
          days after mailing of the Conversion Notice nor later than sixty (60)
          days after such date) or upon the Option Strike Date in the case of a
          Forced Conversion pursuant to Section 7(b) and the Series Two
          Preferred Units so presented for conversion shall be deemed converted
          into Common Units at the close of business on such date, and such
          conversion shall be in accordance with the Conversion Price in effect
          on such date (unless such day is not a Business Day, in which event
          such conversion shall be deemed to have become effective at the close
          of business on the next succeeding Business Day) as determined in
          accordance with subsection (a).

     (e)  No fractions of Common Units shall be issued upon conversion of the
          Series Two Preferred Units. Instead of any fractional interest in a
          Common Unit that would otherwise be deliverable upon the conversion of
          a Series Two Preferred Unit, the Partnership shall pay to the holder
          of such Series Two Preferred Unit an amount in cash based upon the
          Current Market Price of Common Units on the Trading Day immediately
          preceding the date of conversion. If more than one Series Two
          Preferred Unit shall be surrendered for conversion at one time by the
          same holder, the number of full Common Units issuable upon conversion
          thereof shall be computed on the basis of the aggregate number of
          Series Two Preferred Units so surrendered.

     (f)  The Assignee of any Limited Partner pursuant to Section 11 of the
          main part of the Partnership Agreement may exercise the rights of such
          Limited Partner pursuant to this Section 7, and such Limited Partner
          shall be deemed to have assigned such rights to such Assignee and
          shall be bound by the exercise of such rights by the Assignee.

                                      -18-

 
     (g)  The Conversion Price shall be adjusted from time to time as follows:

          (i)  If the Partnership shall after the Issue Date (A) pay or make a
               distribution to holders of its Common Units in Common Units, (B)
               subdivide its outstanding Common Units into a greater number of
               Common Units, (C) combine its outstanding Common Units into a
               smaller number of Common Units or (D) issue any Common Units by
               reclassification of its Common Units, the Conversion Price in
               effect at the opening of business on the day following the date
               fixed for the determination of Common Unit holders entitled to
               receive such distribution or at the opening of business on the
               day following the day on which such subdivision, combination or
               reclassification becomes effective, as the case may be, shall be
               adjusted so that the holder of any Series Two Preferred Unit
               thereafter surrendered for conversion shall be entitled to
               receive the number of Common Units that such holder would have
               owned or have been entitled to receive after the happening of any
               of the events described above had such Series Two Preferred Units
               been converted immediately prior to the record date in the case
               of a distribution or the effective date in the case of a
               subdivision, combination, or reclassification. An adjustment made
               pursuant to this subsection (g)(i) shall become effective
               immediately after the opening of business on the day next
               following the record date in the case of a distribution and shall
               become effective immediately after the opening of business on the
               day next following the effective date in the case of a
               subdivision, combination, or reclassification and automatically
               without any further required action of the Partnership or the
               Series Two Preferred Unit holders.

          (ii) If the Partnership shall issue after the Issue Date rights, 
               options or warrants to all holders of Common Units entitling them
               to subscribe for or purchase Common Units (or securities
               convertible into or exchangeable for Common Units) at a price per
               Common Unit less than the Fair Market Value per Common Unit on
               the record date for the determination of Common Unit holders
               entitled to receive such rights, options or warrants, then the

                                      -19-

 
               Conversion Price in effect at the opening of business on the day
               next following such record date shall be adjusted to equal the
               price determined by multiplying (I) the Conversion Price in
               effect immediately prior to the opening of business on the day
               following the record date fixed for such determination by (II) a
               fraction, the numerator of which shall be the sum of (A) the
               number of Common Units outstanding on the close of business on
               the record date fixed for such determination and (B) the number
               of Common Units that the aggregate proceeds to the Partnership
               from the exercise of such rights, options or warrants for Common
               Units would purchase at such Fair Market Value, and the
               denominator of which shall be the sum of (A) the number of Common
               Units outstanding on the close of business on the date fixed for
               such determination and (B) the number of additional Common Units
               offered for subscription or purchase pursuant to such rights,
               options or warrants. Such adjustment shall become effective
               immediately upon the opening of business on the day next
               following such record date (subject to paragraph (l) below). In
               determining whether any rights, options or warrants entitle the
               holders of Common Units to subscribe for or purchase Common Units
               at less than such Fair Market Value, there shall be taken into
               account any consideration received by the Partnership upon
               issuance and upon exercise of such rights, options or warrants,
               the value of such consideration, if other than cash, to be
               determined in good faith by the General Partner.

         (iii) If the Partnership shall distribute to all holders of its 
               Common Units any Partnership Units (other than Common Units) or
               evidence of its indebtedness or assets (excluding (x) cash
               distributions that were taken into account in calculating the
               distribution payable under Section 3(a), and (y) cash
               distributions to the extent that after giving effect to such
               distributions the fair market value of the assets of the
               Partnership exceed the sum of the liabilities of the Partnership,
               as determined in good faith by the General Partner) or rights or
               warrants to subscribe for or purchase any of its securities
               (excluding those rights and warrants issued to all holders of
               Common Units entitling them to subscribe for or purchase Common
               Units or securities convertible into or exchangeable for Common
               Units, which rights and warrants and

                                      -20-

 
               convertible or exchangeable securities are referred to in and
               treated under subparagraph (ii) above) (any of the foregoing
               being hereinafter in this subparagraph (iii) called the
               "Securities"), then in each case the Conversion Price shall be
               adjusted so that it shall equal the price determined by
               multiplying (I) the Conversion Price in effect immediately prior
               to the close of business on the date fixed for the determination
               of Unit holders entitled to receive such distribution by (II) a
               fraction, the numerator of which shall be the Fair Market Value
               per Unit of the Common Units on the record date mentioned below
               less the then fair market value (as determined by the General
               Partner in good faith) of the portion of the Units or assets or
               evidences of indebtedness so distributed or of such rights or
               warrants applicable to one Common Unit, and the denominator of
               which shall be the Fair Market Value per Unit of the Common Units
               on the record date mentioned below. Such adjustment shall become
               effective immediately upon the opening of business on the day
               next following the record date for the determination of Unit
               holders entitled to receive such distribution (subject to
               paragraph (l) below). For the purposes of this subparagraph
               (iii), the distribution of a Security, which is distributed not
               only to the holders of the Common Units on the date fixed for the
               determination of Unit holders entitled to such distribution of
               such Security, but also is required to be distributed with each
               Common Unit delivered to a person converting a Series Two
               Preferred Unit after such determination date, shall not require
               an adjustment of the Conversion Price pursuant to this
               subparagraph (iii); provided that on the date, if any, on which a
               person converting a Series Two Preferred Unit would no longer be
               entitled to receive such Security with a Common Unit (other than
               as a result of the termination of all such Securities), a
               distribution of such Securities shall be deemed to have occurred,
               and the Conversion Price shall be adjusted as provided in this
               subparagraph (iii) (and such day shall be deemed to be "the date
               fixed for the determination of the Unit holders entitled to
               receive such distribution" and "the record date" within the
               meaning of the two preceding sentences).

          (iv) Notwithstanding the foregoing, no adjustment shall be made 
               pursuant to the preceding clauses (ii) and

                                      -21-

 
               (iii) that would result in any increase in the Conversion Price.
               No adjustment in the Conversion Price shall be required unless
               such adjustment would require a cumulative increase or decrease
               of at least 1% in such price; provided, however, that any
               adjustments that by reason of this subsection (g)(iv) are not
               required to be made shall be carried forward and taken into
               account in any subsequent adjustment until made; and provided,
               further, that any adjustment shall be required and made in
               accordance with the provisions of this Section 7 (other than this
               subsection (g)(iv)) not later than such time as may be required
               in order to preserve the tax-free nature of a distribution to the
               holders of Common Units. Notwithstanding any other provisions of
               this Section 7, the Partnership shall not be required to make any
               adjustment of the Conversion Price for the issuance of any Common
               Units pursuant to any employee benefit or compensation plan or
               other plan providing for the reinvestment of distributions or
               interest payable on securities of the Partnership and the
               investment of additional optional amounts in Common Units under
               such plan (or the issuance of any Common Units to the General
               Partner in respect of a capital contribution by it resulting from
               an analogous sale of its securities). All calculations under this
               Section 7 shall be made to the nearest cent (with $.005 being
               rounded upward) or to the nearest one-tenth of a Unit (with .05
               of a Unit being rounded upward), as the case may be. Anything in
               this paragraph (g) to the contrary notwithstanding, the
               Partnership shall be entitled, to the extent permitted by law, to
               make such adjustments in the Conversion Price (but without
               adversely affecting the economic value of a Series Two Preferred
               Unit), in addition to those required by this paragraph (g), as it
               in its discretion shall determine to be advisable in order that
               any Series Two Preferred Unit distributions, subdivision of
               Series Two Preferred Units, reclassification or combination of
               Series Two Preferred Units, distribution of rights, options or
               warrants to purchase stock or securities, or a distribution of
               other assets (other than cash distributions) hereafter made by
               the Partnership to the holders of the Series Two Preferred Units
               shall not be taxable.

                                      -22-

 
          (h)  If the Partnership or the General Partner shall be a party to any
               transaction (including without limitation a merger,
               consolidation, unit exchange, self tender offer for all or
               substantially all Common Units, sale of all or substantially all
               of the Partnership's assets or recapitalization of the Common
               Units and excluding any transaction as to which subparagraph
               (g)(i) of this Section 7 applies) (each of the foregoing being
               referred to herein as a "Transaction"), in each case as a result
               of which Common Units shall be exchanged for or converted into
               the right, or the holders of such Units shall otherwise be
               entitled, to receive securities or other property (including cash
               or any combination thereof), each Series Two Preferred Unit shall
               upon the commencement of the Conversion Period be convertible
               into the kind and amount of Units or securities and other
               property (including cash or any combination thereof)(the "Per
               Series Two Preferred Unit Merger Consideration") receivable upon
               the consummation of such Transaction by a holder of that number
               of Common Units into which one Series Two Preferred Unit was
               convertible immediately prior to such Transaction (unless, in
               connection with such Transaction, the Series Two Preferred Units
               had been converted into the right to receive such consideration
               (and thus, are no longer outstanding)), assuming such holder of
               Common Units is not a Person with which the Partnership
               consolidated or into which the Partnership merged or which merged
               into the Partnership or to which such sale or transfer was made,
               as the case may be (a "Constituent Person"), or an affiliate of a
               Constituent Person. In the event that holders of Common Units
               have the opportunity to elect the form or type of consideration
               to be received upon consummation of the Transaction, prior to
               such transaction the General Partner shall give prompt written
               notice to each Series Two Preferred Unit holder of such election,
               and each Series Two Preferred Unit holder shall also have the
               right to elect, by written notice to the General Partner, the
               form or type of consideration to be received upon conversion of
               each Series Two Preferred Unit held by such holder following
               consummation of such Transaction, and after such election the
               consideration thereby elected shall be the "Per Series Two
               Preferred Unit Merger Consideration" for each Series Two
               Preferred Unit held by such holder or any transferee thereof. If
               a holder of Series Two Preferred Units fails to make such an
               election, such holder (and any of its transferees) shall receive
               upon conversion of each Series Two Preferred Unit held by such
               holder (or by

                                      -23-

 
               any of its transferees) the same Per Series Two Preferred Unit
               Merger Consideration that a holder of that number of Common Units
               into which one Series Two Preferred Unit was convertible
               immediately prior to such Transaction would receive if such
               Common Unit holder failed to make such an election. The
               Partnership shall not be a party to any Transaction unless the
               terms of such Transaction are consistent with the provisions of
               this paragraph (h), and it shall not consent or agree to the
               occurrence of any Transaction until the Partnership has entered
               into an agreement with the successor or purchasing entity, as the
               case may be, for the benefit of the holders of the Series Two
               Preferred Units that will contain provisions enabling the holders
               of the Series Two Preferred Units that remain outstanding after
               such Transaction to convert their Series Two Preferred Units into
               the consideration provided for herein and that shall preserve the
               distribution preference, conversion, redemption, and other rights
               set forth in this Certificate.
 
         (i)   If:

                (i) the Partnership shall declare a distribution on the Common
                    Units (excluding cash distributions to the extent that after
                    giving effect to such distributions the fair market value of
                    the assets of the Partnership exceed the sum of the
                    liabilities of the Partnership, as determined in good faith
                    by the General Partner); or

               (ii) the Partnership shall authorize the granting to the holders
                    of the Commo n Units of rights or warrants to subscribe for
                    or purchase any Units of any class or any other rights or
                    warrants; or

              (iii) there shall be any reclassification of the Common Units
                    (other than an event to which subparagraph (g)(i) of this
                    Section 7 applies) or any consolidation or merger to which
                    the Partnership is a party and for which approval of any
                    Unit holders of the Partnership is required, or a unit
                    exchange involving the conversion or exchange of Common
                    Units into securities or other property, or a self tender
                    offer by the Partnership for all or substantially all of its
                    outstanding Common Units, or the sale or transfer of all or
                    substantially all of the assets of the Partnership as an
                    entirety and for which approval of any Unit holders of the
                    Partnership is required; or

                                      -24-

 
               (iv) if there shall occur the voluntary or involuntary
                    liquidation, dissolution or winding up of the Partnership;

               then the Partnership shall cause to be mailed to the holders of
               the Series Two Preferred Units at their addresses as shown on the
               records of the Partnership, as promptly as possible, but at least
               15 days prior to the applicable date hereinafter specified, a
               notice stating (A) the date on which a record is to be taken for
               the purpose of such distribution or granting of rights or
               warrants, or, if a record is not to be taken, the date as of
               which the holders of Common Units of record to be entitled to
               such distribution or granting of rights or warrants are to be
               determined or (B) the date on which such reclassification,
               consolidation, merger, unit exchange, sale, transfer,
               liquidation, dissolution or winding up is expected to become
               effective, and the date as of which it is expected that holders
               of Common Units of record shall be entitled to exchange their
               Common Units for securities or other property, if any,
               deliverable upon such reclassification, consolidation, merger,
               unit exchange, sale, transfer, liquidation, dissolution or
               winding up. Failure to give or receive such notice or any defect
               therein shall not affect the legality or validity of the
               proceedings described in this Section 7.

          (j)  In the event that a Cash Business Combination is to be 
               consummated or proposed to the holders of Common Units, the
               notice referred to in subparagraph (i)(iii) above shall specify
               such fact and such notice shall be mailed to the holders of the
               Series Two Preferred Units simultaneously with the mailing of
               notice to holders of Common Units of the holding of a meeting or
               written consent or making of elections with respect to the Cash
               Business Combination. In such event, the holders of Series Two
               Preferred Units shall be permitted to tender their Series Two
               Preferred Units for conversion, in accordance with Section 7
               hereof, and may condition such tender upon the consummation of
               such Cash Business Combination. Any such conversion of Series Two
               Preferred Units shall happen simultaneously with the consummation
               of the Cash Business Combination such that holders of Series Two
               Preferred Units receive, at the consummation of the Cash Business
               Combination, the consideration described in Section 7(h).

          (k)  Whenever the Conversion Price is adjusted as herein provided, the
               Partnership shall promptly file in the books and records of the
               Partnership and provide to

                                      -25-

 
               each holder an officer's certificate setting forth the Conversion
               Price after such adjustment as required by the terms hereof and
               setting forth a brief statement of the facts requiring such
               adjustment, which certificate shall be conclusive evidence of the
               correctness of such adjustment absent manifest error. Promptly
               after filing of such certificate, the Partnership shall prepare a
               notice of such adjustment of the Conversion Price setting forth
               the adjusted Conversion Price and the effective date such
               adjustment becomes effective and shall mail such notice of such
               adjustment of the Conversion Price to the holders of each Series
               Two Preferred Unit at such holder's last address as shown on the
               records of the Partnership.

          (l)  In any case in which paragraph (g) of this Section 7 provides 
               that an adjustment shall become effective on the day next
               following the record date for an event, the Partnership may defer
               until the occurrence of such event (A) issuing to the holder of
               any Series Two Preferred Unit converted after such record date
               and before the occurrence of such event the additional Common
               Units issuable upon such conversion by reason of the adjustment
               required by such event over and above the Common Units issuable
               upon such conversion before giving effect to such adjustment and
               (B) paying to such holder any amount of cash in lieu of any
               fractional Common Unit.

          (m)  There shall be no adjustment of the Conversion Price in case of
               the issuance of any Units in a reorganization, acquisition or
               other similar transaction except as specifically set forth in
               this Section 7. If any action would require adjustment of the
               Conversion Price pursuant to more than one paragraph of this
               Section 7, only one adjustment shall be made, and such adjustment
               shall be the amount of adjustment that has the highest absolute
               value; provided, however, that multiple actions taken at or about
               the same time shall be subject to separate adjustments.

          (n)  If the Partnership shall take any action affecting the Common
               Units, other than action described in this Section 7, that in the
               opinion of the General Partner would materially adversely affect
               the conversion rights of the holders of the Series Two Preferred
               Units, the Conversion Price for the Series Two Preferred Units
               may be adjusted, to the extent permitted by law, in such manner,
               if any, and at such time, as the General Partner, in its sole
               discretion, may determine to be equitable in the circumstances.

                                      -26-

 
(8)  Voting Rights.
     ------------- 

     (a)  Holders of the Series Two Preferred Units will not have any voting 
          rights, except as set forth below or as otherwise from time to time
          required by law.

     (b)  So long as any Series Two Preferred Units remain outstanding, the
          Partnership shall not, without the affirmative vote of the holders of
          at least a majority of the Series Two Preferred Units outstanding at
          the time, given in person or by proxy, either in writing or at a
          meeting (voting separately as a class), amend, alter or repeal the
          provisions of the Partnership Agreement, increase the number of
          authorized Series Two Preferred Units or create any additional class
          or series of Preferred Units, whether by merger, consolidation or
          otherwise, so as to materially and adversely affect any right,
          preference, privilege or voting power of the Series Two Preferred
          Units or the holders thereof in their capacity as holders of Series
          Two Preferred Units; but subject, in any event, to the following
          provisions:

          (i)  With respect to the occurrence of any merger, consolidation or 
               other business combination or reorganization, so long as the
               Series Two Preferred Units remain outstanding with the terms
               thereof materially unchanged or, if the Partnership is not the
               surviving entity in such transaction, are exchanged for a
               security of the surviving entity with terms that are materially
               the same with respect to rights to distributions, voting,
               redemption and conversion as the Series Two Preferred Units and
               without any income, gain or loss expected to be recognized by the
               holder upon the exchange for federal income tax purposes (and
               with the terms of the Common Units or such other securities for
               which the Series Two Preferred Units (or the substitute security
               therefor) are convertible materially the same with respect to
               rights to distributions, voting, redemption and conversion), the
               occurrence of any such event shall not be deemed to materially
               and adversely affect such rights, preferences, privileges or
               voting powers of the holders of the Series Two Preferred Units.

          (ii) Any creation or issuance of any Common Units or of any class or
               series of Preferred Units, in each case ranking junior to the
               Series Two Preferred Units with respect to payment of
               distributions,

                                      -27-

 
               redemption rights and the distribution of assets upon
               liquidation, dissolution or winding up, shall not be deemed to
               materially and adversely affect such rights, preferences,
               privileges or voting powers of the holders of the Series Two
               Preferred Units.

        (iii)  Any creation or issuance of any series of Preferred Units (other
               than an issuance of additional Series Two Preferred Units, as to
               which a class vote shall be required; provided that no class vote
               shall be required for any issuance of Series Two Preferred Units
               in connection with or as contemplated by any of the Source
               Agreements), or any increase in the amount of authorized Units of
               such series, in each case ranking on a parity with the Series Two
               Preferred Units with respect to payment of distributions, voting,
               redemption and the distribution of assets upon liquidation,
               dissolution or winding up, shall not be deemed to materially and
               adversely affect such rights, preferences, privileges or voting
               powers of the holders of the Series Two Preferred Units if such
               issuance is done (x) in connection with an issuance of
               Partnership Units in exchange for non-cash assets (including,
               without limitation, (i) securities, partnership interests,
               membership interests or other interests in an entity and (ii)
               real estate, personal property and intangibles), or to the
               Company following the issuance of securities by it for such non-
               cash assets and the contribution of such non-cash assets to the
               Partnership or (y) in connection with a bona fide capital raising
               transaction or to the Company in consideration of a cash
               contribution to the Partnership following a sale of preferred
               stock by the General Partner in a bona fide capital raising
               transaction.

          (iv) Any creation or issuance of any class or series of Preferred 
               Units ranking senior to the Series Two Preferred Units with
               respect to the payment of distributions, redemption rights and
               the distribution of assets upon liquidation, dissolution or
               winding up, to the extent the issuance of such Units was in
               compliance with the standard set forth in Section 9(c) hereof,
               shall not be deemed to materially and adversely affect such
               rights, preferences, privileges or voting powers of the holders
               of the Series Two Preferred Units.


                                      -28-

 
     (c)  In addition to the voting rights granted in paragraph (b) above, the
          holders of Series Two Preferred Units shall be entitled to vote at any
          time that the Limited Partners are entitled to vote according to the
          Partnership Agreement. The Series Two Preferred Units shall be
          entitled to vote the same number of votes as the Common Units into
          which they may be converted and shall vote with the Holders of Common
          Units as a single class with the Common Units.

     (d)  The foregoing voting provisions will not apply if, at or prior to
          the time when the act, with respect to which such vote would otherwise
          be required, will be effected, all outstanding Series Two Preferred
          Units shall have been converted and/or redeemed.

 
(9)  Ranking.  The Series Two Preferred Units shall be deemed to rank:
     -------                                                          

     (a)  Senior to any class or series of Units of the Partnership, if such 
          class or series shall be Common Units or if the holders of Series Two
          Preferred Units shall be entitled to receipt of distributions or of
          amounts distributable upon liquidation, dissolution or winding up, as
          the case may be, in preference or priority to the holders of Units of
          such class or series, including Junior Preferred Units ("Junior
          Units");

     (b)  On a parity with the Series One Preferred Units, the Series Three 
          Preferred Units and with any other class or series of Units of the
          Partnership, if the holders of such other class or series of Unit and
          the Series Two Preferred Units shall be entitled to the receipt of
          distributions and of amounts distributable upon liquidation,
          dissolution or winding up in proportion to their respective amounts of
          accrued and unpaid distributions per Unit or liquidation preferences,
          without preference or priority one over the other ("Parity Units");
          and

     (c)  Junior only to (I) any indebtedness issued by the Partnership and (II)
          senior preferred units issued only to the General Partner having the
          same distribution rate, term, preferences and other material terms
          (including conversion rights) as preferred shares of stock (A) issued
          only for cash by the General Partner in a public offering, or (B)
          issued only for cash or property in an arm's length transaction (x) to
          one or more institutional investors who are (but for the preferred
          shares so issued) not affiliated with the

                                      -29-

 
          Partnership, the General Partner or any Affiliate (as defined in
          Section 10) thereof and (y) not in connection with any other
          transaction or transactions with any of such Affiliates and (z) which
          would be permitted by Section 10 if such preferred shares were Junior
          Preferred Units, and (C) in either case, the entire cash proceeds (net
          of any arm's length commissions paid to third parties who are not
          Affiliates) of which are contributed by the General Partner to the
          Partnership and used by the Partnership solely for (i) the acquisition
          of assets to be held in the Partnership's business, (ii) capital
          expenditures or maintenance expenses in respect of assets held by the
          Partnership, (iii) other ordinary course expenses of the Partnership,
          or (iv) repayment of indebtedness of the Partnership (including
          indebtedness convertible into Junior Preferred Units or Common Units),
          and (v) none of which proceeds are used (AA) to purchase, redeem,
          retire or otherwise acquire directly or indirectly any Junior
          Preferred Units, Common Units, or shares of preferred stock junior to
          the Series A Preferred Stock of the General Partner or common stock
          issued by the General Partner, or options, warrants, rights to
          purchase or any other securities convertible into the foregoing (other
          than debt repayable pursuant to subclause (iv)) or (BB) to make
          distributions or to pay dividends in respect of any securities
          described in subclause (AA). Any references to the term "Affiliate" in
          this Section 9(c) (including by way of the cross-reference and
          incorporation in clause (z) of the preceding sentence) shall have the
          meaning given thereto in the Amended and Restated By-laws of the
          General Partner as of the date hereof (except that the 5% threshold
          referred to therein shall be deemed for these purposes to be a 10%
          threshold).

(10) Junior Preferred Units.  The Partnership may, at its option, issue Junior
     ----------------------                                                   
     Preferred Units in exchange for arm's length consideration, the adequacy of
     such consideration to be determined in good faith by the Board of Directors
     of the General Partner; provided, however, that the Partnership may not,
     without the consent of holders of a majority of the Series Two Preferred
     Units, (i) issue Junior Preferred Units to any Affiliate (as such term is
     defined in the Amended and Restated By-Laws of the General Partner as of
     the date hereof) of the General Partner or the Partnership, (ii) distribute
     Junior Preferred Units to any holder of Common Units, (iii) issue Junior
     Preferred Units ratably to holders of Common Units for cash or any other
     consideration,  or (iv) issue Junior Preferred Units in exchange for Common
     Units.  Notwithstanding the foregoing, in connection with

                                      -30-

 
     the General Partner's issuance of preferred shares of stock, the
     Partnership may issue Junior Preferred Units to the General Partner having
     the same distribution rate, term, preferences and other material terms as
     such preferred shares, provided the issuance of such preferred shares would
     not violate this Section 10 if such shares were Junior Preferred Units and
     such issuance would comply with the requirements of Section 9 (c) (II) if
     they were senior preferred shares (but without giving effect to the word
     "institutional" in clause (B)(x) of Section 9(c)(II)).

(11) Allocation of Nonrecourse Debt. The provisions of that certain Tax
     ------------------------------                                    
     Reporting Agreement (including but not limited to paragraphs 3 and 4
     thereof) dated the date hereof among the Partnership and such holders are
     hereby incorporated herein by reference.

(12) Notices.  All notices, demand, requests or other communications which may
     -------                                                                  
     be or are required to be given, served or sent hereunder will be in writing
     and delivered by certified U.S. mail, return receipt required, with postage
     prepaid, or by nationally recognized overnight courier service that
     provides tracking and proof of receipt.  Notices shall be deemed delivered
     upon the earlier of (i) delivery, (ii) refusal of delivery by addressee,
     (iii) two Business Days after deposit in the U.S. Mails in the case of
     certified U.S. mail, or (iv) one Business Day after deposit with a
     nationally recognized overnight courier.  Notices to Series Two Preferred
     Unit holders shall be sent to their address of record with the Partnership.
     Any Series Two Preferred Unit holder may change its address of record by
     written notice as given as aforesaid.  Notices delivered to the Partnership
     shall be addressed to Boston Properties Limited Partnership, Attn.: Chief
     Financial Officer, 8 Arlington Street, Boston, MA 02116 or to such other
     address as the Partnership may have notified holders in the manner provided
     in this Section 12.  Notices to be delivered to the General Partner shall
     be addressed to Boston Properties, Inc., Attn: Chief Financial Officer, 
     8 Arlington Street, Boston, MA 02116, or to such other address as the 
     General Partner may have notified holders in the manner provided in this 
     Section 12.

(13) Section 8.6.C of Partnership Agreement.  The provisions of Section 8.6.C of
     --------------------------------------                                     
     the main part of the Partnership Agreement shall not apply to Series Two
     Preferred Units tendered or required to be tendered pursuant to Section 5,
     which shall control over any other provision of the Partnership Agreement.
     The provisions of Section 8.6.C of the Partnership Agreement also shall not
     apply to any Common Units that may be issued upon a conversion of Series
     Two

                                      -31-

 
     Preferred Units ("Conversion Units"). For clarity, it is noted that the
     effect of this provision is that the restriction on the Redemption Right
     set forth in Section 8.6.C of the main part of the Partnership Agreement
     shall not apply to Conversion Units such that if a holder of a Conversion
     Unit presents a Conversion Unit for redemption and the delivery of REIT
     Shares to such holder is prohibited under the Certificate of Incorporation
     of the Company because such delivery would cause such holder to violate the
     Ownership Limit, then (i) the Company may not exercise its rights under
     Section 8.6.B to acquire such Conversion Unit for the REIT Shares Amount
     unless the Company waives or modifies the Ownership Limit applicable to
     such holder and (ii) if the Company does not so waive or modify the
     Ownership Limit then the Partnership must pay such holder the applicable
     Cash Amount to redeem such holder's Conversion Unit.

(14) In the event this Certificate of Designation is amended or modified by the
     parties hereto, the holders of the Series Three Preferred Units issued by
     the Partnership and the Series A Convertible Redeemable Preferred Stock
     issued by the General Partner in accordance with the Source Agreements
     shall each have the right to elect, by vote of a majority in interest of
     such securities, to adopt amendments or modifications of their respective
     securities comparable to the amendments or modifications of this
     Certificate, and in the event of any modification or amendment of such
     securities, the holders of Series Two Preferred Units shall have the right
     to elect, by vote of a majority in interests of the Series Two Preferred
     Units, to adopt amendments or modifications of this Certificate of
     Designation comparable to amendments and modifications of such securities.
     The Partnership and the General Partner agree for the benefit of the
     holders of Series Two Preferred Units that neither of them shall permit the
     amendment or modification of such other securities without causing this
     Section 14 to be given full effect, and the Partnership and the General
     Partner shall take such action as reasonably appropriate or necessary to
     give full effect to this Section 14.

     IN WITNESS WHEREOF, Boston Properties, Inc., as General Partner of the
Partnership, has caused this Certificate of Designations to become effective,
and the Partnership Agreement is hereby amended by giving effect to the terms
set forth herein.

                                      -32-

 
                              BOSTON PROPERTIES, INC.


                              By: /s/ William J. Wedge
                                 --------------------------------
                              Name:  William J. Wedge
                              Title: Senior Vice President 
                                     

                                      -33-

 
Exhibit A to the Certificate of Designations for the Series Two Preferred Units


                   NOTICE OF ELECTION BY PARTNER TO CONVERT
                 SERIES TWO PREFERRED UNITS INTO COMMON UNITS


     The undersigned Series Two Preferred Unit holder hereby (i) elects to
convert the number of Series Two Preferred Units in Boston Properties Limited
Partnership (the "Partnership") set forth below into Common Units in accordance
with the terms of the Second Amended and Restated Agreement of Limited
Partnership of the Partnership and the Certificate of Designations relating to
the Series Two Preferred Units that is a part thereof; and (ii) directs that any
cash in lieu of fractional Common Units that may be deliverable upon such
conversion be delivered to the address specified below.  The undersigned hereby
represents, warrants, and certifies that the undersigned (a) has title to such
Series Two Preferred Units, free and clear of the rights or interests of any
other person or entity other than the Partnership; (b) has the full right,
power, and authority to cause the conversion of such Series Two Preferred Units
as provided herein; and (c) has obtained the consent or approval of all persons
or entities, if any, having the right to consent or approve such conversion.


Name of Series Two Preferred Unit holder: ___________________________________
                                          (Please Print: Exact Name as 
                                          Registered with Partnership)


Date of this Notice:_________________________



Date the Series Two Preferred Units are to be converted:________________/1/


Number of Series Two Preferred Units to be converted:_________________



                                   _____________________________________________
                                   (Signature of Limited Partner: Sign Exact
                                   Name as Registered with Partnership)


                                   _____________________________________________
                                   (Street Address)


                                   _____________________________________________
                                   (City)             (State)         (Zip Code)


        
                                   Signature Guaranteed by:


                                   _____________________________________________

________________________

/1/       Not earlier than 15 days nor later than 60 days after the date this
Notice is deposited in the U.S. mails (certified mail, postage prepaid, return
receipt requested) or deposited with a nationally recognized overnight courier
guaranteeing next business day delivery.

                                      -34-

 
Exhibit B to the Certificate of Designations for the Series Two Preferred Units


                    NOTICE OF ELECTION BY PARTNER TO REDEEM
                      SERIES TWO PREFERRED UNITS FOR CASH


  The undersigned Series Two Preferred Unit holder hereby (i) elects to redeem
the number of Series Two Preferred Units in Boston Properties Limited
Partnership (the "Partnership") set forth below for the redemption price
determined in accordance with the terms of the Second Amended and Restated
Agreement of Limited Partnership of the Partnership and the Certificate of
Designations (the "Certificate") relating to the Series Two Preferred Units that
is a part thereof; and (ii) directs that such redemption price be delivered by
certified check to the address specified below.  The undersigned hereby
represents, warrants, and certifies that the undersigned (a) has title to such
Series Two Preferred Units, free and clear of the rights or interests of any
other person or entity other than the Partnership; (b) has the full right,
power, and authority to cause the redemption of such Series Two Preferred Units
as provided herein; and (c) has obtained the consent or approval of all persons
or entities, if any, having the right to consent or approve such redemption.
The undersigned hereby acknowledges that, except as provided in the Certificate,
distributions on the Series Two Preferred Units to be redeemed shall cease to
accrue on the redemption date indicated below.


Name of Series Two Preferred Unit holder: ___________________________________
                                          (Please Print: Exact Name as 
                                          Registered with Partnership)


Date of this Notice:_________________________



Option Strike Date on which the Series Two Preferred Units are to be
redeemed:________________


Number of Series Two Preferred Units to be redeemed:_________________



                                   _____________________________________________
                                   (Signature of Limited Partner: Sign Exact
                                   Name as Registered with Partnership)


                                   _____________________________________________
                                   (Street Address)


                                   _____________________________________________
                                   (City)             (State)         (Zip Code)



                                   Signature Guaranteed by:
               

                                   _____________________________________________


Note:  Redemptions are subject to reduction and proration as provided in the
       Certificate of Designations and the Partnership Agreement in respect of
       the Series Two Preferred Units.

                                      -35-

 
                                                                   EXHIBIT 99.25


                     BOSTON PROPERTIES LIMITED PARTNERSHIP

                          CERTIFICATE OF DESIGNATIONS

              ESTABLISHING AND FIXING THE RIGHTS, LIMITATIONS AND

                  PREFERENCES OF A SERIES OF PREFERRED UNITS

     Reference is made to the Second Amended and Restated Agreement of Limited
Partnership (the "Partnership Agreement") of Boston Properties Limited
Partnership, a Delaware limited partnership (the "Partnership"), of which this
Certificate of Designations (this "Certificate") shall become a part.
Capitalized terms used herein and not defined herein have the meanings ascribed
thereto in the main part of the Partnership Agreement.  Section references are
(unless otherwise specified) references to sections in this Certificate.

     WHEREAS, Section 14.1.B(3) of the main part of the Partnership Agreement
permits the General Partner, without the consent of the Limited Partners, to
amend the Partnership Agreement for the purpose of setting forth and reflecting
in the Partnership Agreement the designations, rights, powers, duties, and
preferences of holders of any additional Partnership Interests issued pursuant
to Section 4.2.A of the main part of the Partnership Agreement; and

     WHEREAS, the General Partner desires by this Certificate to so amend the
Partnership Agreement as of this 12th day of November, 1998 (the "Closing
Date").

     NOW, THEREFORE, the General Partner has set forth in this Certificate the
following description of the preferences and other rights, voting powers,
restrictions, limitations as to distributions, qualifications and terms and
conditions of conversion and redemption of a class and series of Partnership
Interest to be represented by Partnership Units which shall be referred to as
"Series Three Preferred Units":

     (1) Designation and Number.  A series of Preferred Units, designated the
         ----------------------                                              
         "Series Three Preferred Units," is hereby established.

     (2) Definitions.  For purposes of this Certificate of Designations, the
         -----------                                                        
         following terms shall have the meanings indicated:

     "Cash Business Combination" means a Transaction in which the fair market
     value of the aggregate consideration into which the outstanding Common
     Units are or will be exchanged or converted, or which holders of such Units
     will be entitled to receive, consists of 40% or less voting common equity.
     In determining whether a Transaction is a Cash Business Combination, the
     following will apply: (a) if elections for the type of consideration may be
     made by the holders of Common Units, it will be assumed that all holders of
     Common Units elect or will elect consideration other than voting common
     equity, (b) the determination shall be made in good faith by the General
     Partner, based on the fair market values of the consideration to be issued
     in the Transaction as of the date the definitive merger or other agreement
     relating thereto is entered into, and (c) if

 
     any of the consideration to be issued in the Transaction is a publicly
     traded security, the fair market value of that security shall be the
     Current Market Price of such security as of the date the definitive merger
     or other agreement relating thereto is entered into.

     "Closing Date" shall have the meaning set forth in the recitals above.

     "Conversion Price" shall mean the conversion price per Common Unit for
     which the Series Three Preferred Units are convertible, as such Conversion
     Price may be adjusted pursuant to Section 7 hereof.  The initial Conversion
     Price shall be an amount equal to $38.10 per REIT Share.

     "Conversion Date" shall have the meaning set forth in paragraph (d) of
     Section 7 hereof.

     "Conversion Period" shall have the meaning set forth in paragraph (a) of
     Section 7 hereof.

     "Conversion Right" shall have the meaning set forth in paragraph (a) of
     Section 7 hereof.

     "Current Market Price" of a REIT Share or of a publicly traded security of
     any other issuer for any day shall mean the last reported sales price,
     regular way, on such day, or, if no sale takes place on such day, the
     average of the reported closing bid and asked prices on such day, regular
     way, in either case as reported on the New York Stock Exchange ("NYSE") or,
     if such security is not listed or admitted for trading on the NYSE, on the
     principal national securities exchange on which such security is listed or
     admitted for trading or, if not listed or admitted for trading on any
     national securities exchange, on the Nasdaq National Market or, if such
     security is not quoted on such Nasdaq National Market, the average of the
     closing bid and asked prices on such day in the over-the-counter market as
     reported by Nasdaq or, if bid and asked prices for such security on such
     day shall not have been reported through Nasdaq, the average of the bid and
     asked prices on such day as furnished by any NYSE member firm regularly
     making a market in such security selected for such purpose by the Chief
     Executive Officer of the Partnership or the General Partner.  "Current
     Market Price" of a Common Unit as of any day means the Current Market Price
     of a REIT Share multiplied by the Conversion Factor, as such term is
     defined in the main part of the Partnership Agreement.

     "Distribution Payment Date" shall mean the fifteenth day of February, May,
     August and November, in each year, commencing on November 16, 1998;
     provided, however, that if any Distribution Payment Date falls on any day
     other than a Business Day, the distribution payment due on such
     Distribution Payment Date shall be paid on the first Business Day
     immediately following such Distribution Payment Date.

                                       2

 
     "Distribution Periods" shall mean quarterly distribution periods from and
     after a Distribution Payment Date and to and excluding the next succeeding
     Distribution Payment Date (other than the initial Distribution Period,
     which shall commence on the day after the Closing Date and end on and
     exclude November 16, 1998).

     "Fair Market Value" shall mean the average of the daily Current Market
     Prices per Common Unit during the ten (10) consecutive Trading Days
     selected by the Partnership commencing not more than 20 Trading Days
     before, and ending not later than, the earlier of the day in question and
     the day before the "ex" date with respect to the issuance or distribution
     requiring such computation. The term "`ex' date," when used with respect to
     any issuance or distribution, means the first day on which REIT Shares
     trade regular way, without the right to receive such issuance or
     distribution, on the exchange or in the market, as the case may be, used to
     determine that day's Current Market Price.

     "Forced Conversion" has the meaning set forth in Section 7(b) hereof.

     "Forced Conversion Amount" shall mean the number of Series Three Preferred
     Units which the General Partner may require to be converted as provided in
     paragraph 7(b);

     "Forced Conversion Option" shall have the meaning set forth in paragraph
     (b) of Section 7 hereof.

     "Issue Date" shall mean, with respect to a Series Three Preferred Unit, the
     day after the Closing Date.

     "Junior Preferred Units" shall mean any class or series of Partnership
     Units the holders of which are entitled to the receipt of distributions or
     of amounts distributable upon liquidation, dissolution or winding up, as
     the case may be, junior in priority to the holders of the Series Three
     Preferred Units, but senior in priority to the holders of Common Units.

     "Junior Units" shall mean the Common Units and any other class or series of
     Partnership Units constituting junior units within the meaning set forth in
     paragraph (a) of Section 9 hereof.

     "Liquidation Preference" shall have the meaning set forth in paragraph (a)
     of Section 4 hereof.

     "Option Strike Date" shall have the meaning set forth in paragraph (a) of
     Section 5 hereof.

     "Parity Units" shall have the meaning set forth in paragraph (b) of 
     Section 9 hereof.

                                       3

 
     "Preferred Rate" shall mean, at any given time, the rate per annum as to
     which distributions accrue on each Series Three Preferred Unit, based on
     the Liquidation Preference, for purposes of determining the Stated
     Quarterly Distribution in effect at such time, as set forth in the
     following schedule:

     Time Period                               Preferred Rate
     -----------                               --------------
     November 12, 1998 to March 31, 1999            5.0%
     April 1, 1999 to December 31, 1999             5.5%
     January 1, 2000 to December 31, 2000           5.625%
     January 1, 2001 to December 31, 2001           6.0%
     January 1, 2002 to December 31, 2002           6.5%
     January 1, 2003 to May 12, 2009                7.0%
     May 13, 2009 and thereafter                    6.0%

     "Ratchet Distribution" shall mean for each Distribution Payment Date a
     distribution payable, if applicable, per Series Three Preferred Unit in
     respect of the Distribution Period ending on such Distribution Payment
     Date.  The Ratchet Distribution for each Distribution Period shall be equal
     to the distribution which would have been paid in respect of such Series
     Three Preferred Unit had (i) such Series Three Preferred Unit been
     converted into (x) a number of Common Units determined by dividing the
     Liquidation Preference by the Conversion Price in effect on such
     Distribution Payment Date and any (y) Other Securities (as defined below)
     issuable upon such conversion and (ii) there had been paid in respect of
     each such Common Unit and Other Securities (including any fractional
     portion thereof to the fourth decimal) a distribution (the "Regular
     Distribution") equal to the regular, quarterly cash distribution paid to
     holders of record of Common Units and Other Securities on that record date
     (the "Reference Record Date") which is closest to the end of the calendar
     quarter preceding such Distribution Payment Date.  For purposes of
     determining the Ratchet Distribution, in the event that a special cash
     distribution was paid to holders of Common Units and Other Securities on
     the Reference Record Date or at any time prior to the Reference Record Date
     and after the last record date for regular, quarterly cash distributions,
     then in such event the Ratchet Distribution shall include, in addition to
     the Regular Distribution paid in respect of the Reference Record Date, the
     amount of such special cash distribution paid in respect of each Common
     Unit or Other Security (for clarity, it is noted that the effect of this
     sentence is to assure that in calculating the Ratchet Distribution the
     holders of Series Three Preferred Units will benefit from any cash
     distributions paid in respect of Common Units and Other Securities even if
     such cash distributions might not be characterized as "regular, quarterly
     cash distributions").  In the event that a Series Three Preferred Unit is
     outstanding for only a portion of a Distribution Period, then the Ratchet
     Distribution with respect to such Series Three Preferred Unit and such
     Distribution Period shall be determined as provided in the preceding
     sentence but shall then be adjusted by multiplying such amount by a
     fraction, the numerator of which equals the number of days such Series
     Three Preferred Unit had been outstanding during such period and the
     denominator of which shall equal the total number of days during such
     Distribution Period.  As used herein, the term "Other 

                                       4

 
     Security" means any security in addition to Common Units (including
     Junior Preferred Units) which may be issuable to a holder of Series Three
     Preferred Units upon conversion of a Series Three Preferred Unit.

     "Redemption Notice" shall have the meaning set forth in paragraph (b) of
     Section 5 hereof.

     "Redemption Right" shall have the meaning set forth in paragraph (a) of
     Section 5 hereof.

     "Securities" shall have the meaning set forth in paragraph (g)(iii) of
     Section 7 hereof.

     "Source Agreements" shall mean that certain Master Transaction Agreement
     dated September 28, 1998 by and among the General Partner, the Partnership
     and, among others, the holders of the Series Three Preferred Units
     designated hereby, and each of the other agreements contemplated therein.

     "Stated Quarterly Distribution" shall mean for each Distribution Payment
     Date a distribution payable, if applicable, per each Series Three Preferred
     Unit in respect of the Distribution Period ending on such Distribution
     Payment Date.  The Stated Quarterly Distribution for each Distribution
     Period shall equal the sum of the following products for each day in such
     Distribution Period on which the Series Three Preferred Unit is
     outstanding: (i) the Preferred Rate in effect on such day divided by 365,
     multiplied by (ii) the Liquidation Preference.

     "Target Amount" shall mean that number of Series Three Preferred Units
     having a Liquidation Preference equal to one-sixth of the aggregate
     Liquidation Preference of the Series Three Preferred Units issued under the
     Source Agreements.

     "Trading Day" shall mean any day on which the securities in question are
     traded on the New York Stock Exchange ("NYSE"), or if such securities are
     not listed or admitted for trading on the NYSE, on the principal national
     securities exchange on which such securities are listed or admitted, or if
     not listed or admitted for trading on any national securities exchange, on
     the Nasdaq National Market, or if such securities are not quoted on such
     Nasdaq National Market, in the applicable securities market in which the
     securities are traded.

     "Transaction" shall have the meaning set forth in paragraph (h) of 
     Section 7 hereof.

     (3)  Distributions.
          ------------- 

          (a) The holders of Series Three Preferred Units shall be entitled to
              receive, in respect of each Distribution Payment Date, when, as
              and if authorized and declared by the General Partner out of
              assets legally available for

                                       5

 
              that purpose, cumulative preferential distributions payable in
              cash in an amount per Series Three Preferred Unit equal to the
              greater of (i) the Stated Quarterly Distribution for such
              Distribution Payment Date or (ii) the Ratchet Distribution for
              such Distribution Payment Date. Such distributions shall, with
              respect to each Series Three Preferred Unit, be cumulative from
              and including its Issue Date, whether or not in, or with respect
              to, any Distribution Period or Periods (i) such distributions are
              declared, (ii) the Partnership is contractually prohibited from
              paying such distributions or (iii) there shall be assets of the
              Partnership legally available for the payment of such
              distributions, and shall be payable quarterly, when, as and if
              authorized and declared by the General Partner, in arrears on
              Distribution Payment Dates, commencing on the first Distribution
              Payment Date after the Issue Date of such Series Three Preferred
              Units. Distributions are cumulative from the most recent
              Distribution Payment Date to which distributions have been paid,
              whether or not, or with respect to, in any Distribution Period or
              Periods (i) such distributions are declared, (ii) the Partnership
              is contractually prohibited from paying such distributions or
              (iii) there shall be assets legally available therefor. Each such
              distribution shall be payable in arrears to the holders of record
              of the Series Three Preferred Units, as they appear on the records
              of the Partnership at the close of business on such record dates,
              not more than 30 days preceding the applicable Distribution
              Payment Date (the "Distribution Payment Record Date") (or, in the
              case of a Distribution Payment Record Date that coincides with a
              record date for payment of distributions on Common Units, not more
              than 60 days preceding the applicable Distribution Payment Date),
              as shall be fixed by the General Partner; provided, however, that
              with respect to the first Distribution Period, the Distribution
              Payment Record Date for such period will be on or after the Issue
              Date. Accrued and unpaid distributions for any past Distribution
              Periods and any additional amounts as provided in subsection (f)
              may be authorized and declared and paid at any time, without
              reference to any regular Distribution Payment Date, to holders of
              record on such date, not exceeding 45 days preceding the payment
              date thereof (or, in the case of a record date that coincides with
              a record date for payment of distributions on Common Units, not
              more than 60 days preceding the applicable payment date thereof),
              as may be fixed by the General Partner.

          (b) The first Distribution Period with respect to the first Series
              Three Preferred Units issued shall be for the period from on and
              after the Closing Date to the first Distribution Payment Date of
              (and excluding) November 16, 1998.

                                       6

 
          (c) So long as any Series Three Preferred Units are outstanding, no
              distributions (whether in cash or in kind or upon liquidation of
              the Partnership), except as described in the immediately following
              sentence, shall be authorized and declared or paid on any series
              or class or classes of Parity Units for any period nor shall any
              Parity Units be redeemed, purchased or otherwise acquired for any
              consideration or any moneys to be paid to or made available for a
              sinking fund for the redemption of any Parity Units, directly or
              indirectly (except by conversion into or exchange for Parity Units
              or Junior Units), unless full cumulative distributions, including,
              if applicable, the further preferential distribution provided in
              subsection (f), have been or contemporaneously are authorized and
              declared and paid on the Series Three Preferred Units for all
              Distribution Periods terminating on or prior to the distribution
              payment date on (or date of purchase, redemption or other
              acquisition of) such class or series of Parity Units. When
              distributions are not paid in full upon the Series Three Preferred
              Units and any other class or classes of Parity Units, all
              distributions authorized upon the Series Three Preferred Units and
              any other class or classes of Parity Units shall be authorized and
              declared ratably in proportion to the respective amounts of
              distributions accumulated and unpaid on the Series Three Preferred
              Units and such Parity Units (which shall not include any accrual
              in respect of unpaid distributions for prior distribution periods
              if such Parity Units do not have a cumulative distribution).

          (d) So long as any Series Three Preferred Units are outstanding, no
              distributions (other than distributions paid solely in Junior
              Units, or options, warrants or rights to subscribe for or purchase
              Junior Units) shall be authorized and declared or paid or other
              distribution authorized and declared or made upon Junior Units for
              any period, nor shall any Junior Units be redeemed, purchased or
              otherwise acquired (other than a redemption, purchase or other
              acquisition of Common Units made for purposes of and in compliance
              with requirements of employee incentive or employee benefit plans
              of the Partnership or the General Partner or any of their
              subsidiaries), for any consideration (or any moneys to be paid to
              or made available for a sinking fund for the redemption of any
              Junior Units) by the Partnership, directly or indirectly (except
              by conversion into or exchange for Junior Units), unless in each
              case (i) the full cumulative distributions on all outstanding
              Series Three Preferred Units, including, if applicable, the
              further preferential distribution provided in subsection (f), and
              any other Parity Units of the Partnership shall have been paid for
              all past Distribution Periods with respect to the Series Three
              Preferred Units and all past distribution periods with respect to
              such Parity Units and (ii) sufficient funds shall have been paid
              for or irrevocably set aside and designated for payment of the

                                       7

 
              distribution due for the current Distribution Period with respect
              to the Series Three Preferred Units.

          (e) Without limiting the other provisions hereof, no distributions on
              Series Three Preferred Units (other than liquidating distributions
              made in accordance with Section 13.2 of the main part of the
              Partnership Agreement and Section 4 hereof) shall be paid by the
              Partnership at such time as the terms and provisions of any
              agreement of the Partnership or its affiliates or subsidiaries,
              relating to bona fide indebtedness for borrowed money, prohibits
              such declaration or payment or provides that such declaration or
              payment would constitute a breach thereof or a default thereunder,
              or if such declaration or payment shall be restricted or
              prohibited by law (and such failure to pay distributions on the
              Series Three Preferred Units shall prohibit other distributions by
              the Partnership as described in Sections 3(c) and (d)).

          (f) Notwithstanding the foregoing, distributions on the Series Three
              Preferred Units shall accrue whether or not the terms and
              provisions set forth in Section 3(e) hereof at any time prohibit
              the current payment of distributions, whether or not the
              Partnership has earnings, whether or not there are funds legally
              available for the payment of such distributions and whether or not
              such distributions are declared. Accrued but unpaid distributions
              on the Series Three Preferred Units will accumulate as of the
              Distribution Payment Date on which they first become payable and a
              further preferential distribution at the per annum rate then
              applicable for the period or periods specified in subsection (a)
              above shall accrue during the period of accumulation and be
              distributed in respect of such unpaid distributions until the
              amount thereof and the further preferential amount thereon shall
              have been distributed in full.

          (g) Upon liquidation, dissolution or winding up of the Partnership, no
              distributions shall be made to any series or class or classes of
              Junior Units until after payment shall have been made in full to
              the holders of the Series Three Preferred Units, as provided in
              Section 4(a).

          (h) Any distribution made on the Series Three Preferred Units shall
              first be credited against the further preferential distribution
              provided in subsection (f) above and then against the earliest
              accrued but unpaid distribution due with respect to such Series
              Three Preferred Units which remains payable. Other than
              liquidating distributions described in Section 4, the Series Three
              Preferred Units shall be entitled only to the distributions on the
              Series Three Preferred Units as described in this Section 3.

                                       8

 
     (4)  Liquidation Preference.
          ---------------------- 

          (a) In the event of any liquidation, dissolution or winding up of the
              Partnership, whether voluntary or involuntary, before any payment
              or distribution of the assets of the Partnership (whether capital
              or surplus) shall be made to the holders of Junior Units, the
              holders of the Series Three Preferred Units shall be entitled to
              receive Fifty Dollars ($50.00) per Series Three Preferred Unit
              (the "Liquidation Preference") or, if greater, the amount which
              each holder would receive in respect of the Common Units and Other
              Securities and property it would receive upon conversion of its
              Series Three Preferred Units if all Series Three Preferred Units
              were converted pursuant to Section 7 immediately prior to the
              distribution of liquidation proceeds under the Partnership
              Agreement, plus an amount equal to all distributions (whether or
              not earned or declared) accrued and unpaid thereon pursuant to
              Section 3 to the date of final distribution to such holder; but
              such holders of Series Three Preferred Units shall not be entitled
              to any further payment. If, upon any such liquidation, dissolution
              or winding up of the Partnership, the assets of the Partnership,
              or proceeds thereof, distributable among the holders of Series
              Three Preferred Units shall be insufficient to pay in full the
              preferential amount aforesaid and liquidating payments on any
              other Parity Units, then such assets, or the proceeds thereof,
              shall be distributed among the holders of such Series Three
              Preferred Units and any such other Parity Units ratably in
              accordance with the respective amounts that would be payable on
              such Series Three Preferred Units and any such other Parity Units
              if all amounts payable thereon were paid in full.

          (b) Upon any liquidation, dissolution or winding up of the
              Partnership, after payment shall have been made in full to the
              holders of the Series Three Preferred Units and Parity Units, as
              provided in this Section 4, any series or class or classes of
              Junior Units shall, subject to any respective terms and provisions
              applying thereto, be entitled to receive any and all assets
              remaining to be paid or distributed.

          (c) After payment of the full amount of the liquidating distributions
              to which they are entitled pursuant to Sections 4(a) and (b), the
              holders of Series Three Preferred Units will have no right or
              claim to any of the remaining assets of the Partnership.

          (d) The consolidation or merger of the Partnership with or into any
              other corporation, partnership, trust or entity or of any other
              corporation, partnership, trust or entity with or into the
              Partnership, or an exchange of Units or partnership interests, or
              the sale, lease or conveyance of all

                                       9

 
              or substantially all of the property or business of the
              Partnership (unless the net proceeds of any of the foregoing
              transactions shall be distributed to the holders of Units rather
              than reinvested), shall not be deemed to constitute a liquidation,
              dissolution or winding up of the Partnership.

     (5)  Redemption.
          ---------- 

          (a) Subject to adjustment as provided in this Section 5, on each of
              May 12, 2009; May 12, 2010; May 12, 2011; May 14, 2012; May 14,
              2013; and May 12, 2014 (each an "Option Strike Date") (i) each of
              the Series Three Preferred Unit holders, upon giving prior written
              notice as provided below, shall have the right (the "Redemption
              Right") to require that the Partnership redeem for cash, at a
              redemption price of $50 per Series Three Preferred Unit, Series
              Three Preferred Units held by such holder; provided that the
              maximum number of Series Three Preferred Units that may be
              required to be redeemed from all such holders is equal to the
              Target Amount; provided, further, that a holder may not exercise
              the Redemption Right for less than one thousand (1,000) Series
              Three Preferred Units or, if such holder holds less than one
              thousand Series Three Preferred Units, all of the Series Three
              Preferred Units held by such holder; and (ii) the General Partner,
              upon giving prior written notice as provided below, shall have the
              Redemption Right to require the redemption for cash, at a
              redemption price of $50 per Series Three Preferred Unit, of a
              number of Series Three Preferred Units equal to, but not in excess
              of, the Target Amount (in the aggregate from all holders);
              provided, however, that the General Partner may not require the
              redemption by the Partnership on any Option Strike Date of more
              than the lesser of (A) the Target Amount in respect of such Option
              Strike Date or (B) such number of Series Three Preferred Units as
              shall have an aggregate Liquidation Preference equal to the excess
              of (i) the aggregate Liquidation Preference of the sum of the
              Target Amounts for all prior Option Strike Dates and the currently
              applicable Option Strike Date over (ii) the aggregate Liquidation
              Preference of all Series Three Preferred Units previously
              converted (including Forced Conversions), noticed for conversion
              on such Option Strike Date, previously redeemed, and noticed for
              redemption on such Option Strike Date.

              The exercise of a Redemption Right on any Option Strike Date
              shall not be cumulative (i.e., the Target Amount with respect to
              any Option Strike Date is the maximum number of Series Three
              Preferred Units subject to mandatory redemption by either the
              Partnership or the holders of Series Three Preferred Units on each
              Option Strike Date); any Series Three Preferred Units that are not
              converted pursuant to Section 7 or redeemed

                                       10

 
              pursuant to this Section 5 on or before May 12, 2014 shall remain
              outstanding and shall have all of the rights and preferences set
              forth in this Certificate except that the provisions of this
              Section 5 shall not apply to any Series Three Preferred Units
              outstanding after such date.

          (b) In order to exercise its Redemption Right, a holder of Series
              Three Preferred Units shall deliver a notice (a "Redemption
              Notice," such term to also include the notice required to be
              delivered by the General Partner upon exercise of its Redemption
              Right) in the form attached hereto as Exhibit B to the Partnership
              (with a copy to the General Partner) not less than 40 nor more
              than 70 days prior to an Option Strike Date. If a holder of Series
              Three Preferred Units who has delivered a Redemption Notice
              pursuant to this Section 5 converts the Units tendered for
              redemption prior to the redemption date, the Redemption Notice
              shall be deemed revoked. The General Partner may exercise its
              Redemption Right by delivering in writing a Redemption Notice,
              containing the information provided in subsection (e), to each
              holder of record of Series Three Preferred Units, not less than 30
              nor more than 70 days prior to an Option Strike Date.

              If, pursuant to the exercise of a Redemption Right by holders of
              the Series Three Preferred Units, with such redemption to be
              effective on an Option Strike Date, holders tender for redemption
              a number of Series Three Preferred Units having an aggregate
              Liquidation Preference greater than the Target Amount, the
              Partnership may redeem all such Units tendered for redemption or a
              lesser number of Units, as the General Partner determines in its
              sole discretion, but not less than the Target Amount; provided,
              however, that if the Partnership does not redeem all Series Three
              Preferred Units so tendered for redemption, the Partnership shall
              redeem Units ratably from each tendering holder in proportion to
              the respective number of Units tendered. If the holders have
              tendered for redemption a number of Series Three Preferred Units
              less than the Target Amount and the General Partner delivers a
              Redemption Notice to redeem a number of Series Three Preferred
              Units greater than the number of Units tendered for redemption by
              the holders, the Partnership shall first redeem the Series Three
              Preferred Units of those holders exercising their Redemption Right
              pursuant to this Section 5 and shall then redeem, on a pro rata
              basis, Series Three Preferred Units from all holders who hold
              Units after giving effect to such redemption; provided, however,
              that in such case, (i) the General Partner shall deliver a
              separate notice at least 30 days prior to the Option Strike Date,
              containing the information provided in subsection (e), to all
              holders of the Series Three Preferred Units to be so redeemed
              indicating

                                       11

 
              the number of Units to be so redeemed, and (ii) the total number
              of Units to be redeemed (upon notice by the General Partner and
              the holders, collectively) shall not exceed the Target Amount.

              If the General Partner delivers a Redemption Notice to the
              holders of the Series Three Preferred Units, the holders shall
              have the right, subject to Section 7(a), to convert their Series
              Three Preferred Units into Common Units, pursuant to Section 7, on
              or before the Option Strike Date. To the extent that such Series
              Three Preferred Units are so converted, the right of the General
              Partner to require the redemption of Series Three Preferred Units
              shall be reduced by the aggregate Liquidation Preference of the
              Series Three Preferred Units so converted (and the reduction in
              the number of Series Three Preferred Units to be redeemed from
              each holder shall be allocated first to the holders who so elected
              to convert their Units and second pro rata among all other
              holders).

              Within two Business Days of a redemption of Series Three
              Preferred Units, the Partnership shall pay the redemption price by
              certified check to or on the order of those holders whose Series
              Three Preferred Units have been redeemed.

          (c) Immediately prior to any redemption of Series Three Preferred
              Units and as a condition to such redemption, the Partnership shall
              pay, in cash, all accumulated and unpaid distributions, including
              the further preferential distribution provided in Section 3(f),
              through the Option Strike Date in respect of all Series Three
              Preferred Units, including those Series Three Preferred Units to
              be redeemed. Unless full cumulative distributions on all Series
              Three Preferred Units have been paid, the Partnership may not
              require the Series Three Preferred Units to be redeemed.

          (d) The Assignee of any Limited Partner pursuant to Section 11 of the
              main part of the Partnership Agreement may exercise the rights of
              such Limited Partner pursuant to this Section 5, and such Limited
              Partner shall be deemed to have assigned such rights to such
              Assignee and shall be bound by the exercise of such rights by the
              Assignee. In connection with any exercise of such rights by an
              Assignee of a Limited Partner, the cash amount shall be paid by
              the Partnership directly to such Assignee and not to such Limited
              Partner.

          (e) A Redemption Notice shall be provided in the manner provided in
              Section 12. Any defect in a Redemption Notice or in the mailing
              thereof to any particular holder, the Partnership or the General
              Partner shall not affect the sufficiency of the notice or the
              validity of the proceedings for redemption with respect to the
              other holders. Any notice that was

                                       12

 
              mailed in the manner herein provided shall be conclusively
              presumed to have been duly given on the date of deemed delivery
              provided in Section 12, whether or not the holder receives the
              notice. Each of the General Partner's Redemption Notices shall
              state, as appropriate: (1) the Option Strike Date; (2) the number
              of Series Three Preferred Units to be redeemed in the aggregate
              from all holders and, if fewer than all the Series Three Preferred
              Units held by such holder are to be redeemed, the number of such
              Series Three Preferred Units to be redeemed from such holder; and
              (3) that distributions on the Series Three Preferred Units to be
              redeemed shall cease to accrue on such Option Strike Date except
              as otherwise provided herein. Notice having been delivered as
              aforesaid, from and after the Option Strike Date (unless the
              Partnership shall fail to pay the redemption price on the date
              required), (i) except as otherwise provided herein, distributions
              on the Series Three Preferred Units so called for redemption shall
              cease to accrue, (ii) said Units shall no longer be deemed to be
              outstanding, and all rights of the holders thereof as holders of
              Series Three Preferred Units of the Partnership shall cease
              (except the right to receive the redemption price and the amounts
              required to be paid under subsection (c)).

              After the redemption of Series Three Preferred Units as
              aforesaid, the Partnership shall deliver to such holder, upon his
              written request, a certificate of the General Partner certifying
              the number of Common Units and Series Three Preferred Units held
              by such person immediately after such redemption. The Partnership
              shall also advise each holder as to the number of Series Three
              Preferred Units redeemed and the number of Series Three Preferred
              Units which remain outstanding.

          (f) Each Series Three Preferred Unit holder covenants and agrees with
              the Partnership that all Series Three Preferred Units delivered
              for redemption pursuant to this Section 5 shall be delivered to
              the Partnership free and clear of all liens, and, notwithstanding
              anything contained herein to the contrary, the Partnership shall
              not be under any obligation to acquire Series Three Preferred
              Units which are subject to any liens.

     (6)  The rights of each Series Three Preferred Unit holder pursuant to this
          Certificate arise solely from its ownership as a Limited Partner of
          Partnership Interests in the Partnership and not from it being a
          creditor of the Partnership and none of such rights with respect to
          any required redemption shall constitute a "claim" as such term is
          defined in Section 101 of the United States Bankruptcy Code as in
          effect as of the date of this Certificate; provided, however, that any
          rights in respect of such Series Three Preferred Units shall
          constitute equity interests of each Partner hereunder, it being agreed
          and understood that no

                                       13

 
          Partner is waiving any equity interest it has in the Partnership or
          any rights to assert any such interests in any bankruptcy proceeding
          or otherwise.

     (7)  Conversion.  Holders of the Series Three Preferred Units shall have 
          ----------
          the right (the "Conversion Right") to convert all or a portion of such
          Units into Common Units (provided, however, that a holder may not
          exercise the Conversion Right for less than one thousand (1,000)
          Series Three Preferred Units or, if such holder holds less than one
          thousand Series Three Preferred Units, all of the Series Three
          Preferred Units held by such holder), and the General Partner shall
          have the right on each Option Strike Date to cause a conversion of
          Series Three Preferred Units into Common Units, subject, in each case,
          to the following conditions and procedures:

          (a)  Subject to and upon compliance with the provisions of this
               Section 7, a holder of Series Three Preferred Units shall have
               the right, at his or her option, at any time and from time to
               time during the period on or after the earlier of (i) December
               31, 2002 and (ii) the effective time of a Cash Business
               Combination (the period beginning on and after the earlier of
               such dates, the "Conversion Period"), to convert such Units into
               the number of fully paid and non-assessable Common Units obtained
               by dividing the aggregate Liquidation Preference of such Series
               Three Preferred Units by the Conversion Price as in effect as of
               such time (i.e. after adjustment as described in subsection (g))
               by delivering a Conversion Notice in the form attached hereto as
               Exhibit A within the time period specified in paragraph (d) below
               and in the manner provided in Section 12; provided, however, that
               the right to deliver a conversion notice with respect to Series
               Three Preferred Units called or tendered for redemption pursuant
               to Section 5 hereof shall terminate on that day which is the
               fifth business day prior to the applicable Option Strike Date on
               which such Units are to be redeemed, unless the Partnership shall
               default in making any cash payment required upon a redemption on
               such date as provided in Section 5 hereof. A conversion of Series
               Three Preferred Units specified in the Conversion Notice shall
               occur automatically at the close of business on the applicable
               Conversion Date without any action on the part of the holders of
               Series Three Preferred Units, and immediately after the close of
               business on the Conversion Date the holders of Series Three
               Preferred Units who had all or a portion of their Series Three
               Preferred Units converted shall be credited on the books and
               records of the Partnership with the issuance as of the opening of
               business on the next day of the Common Units issuable upon such
               conversion.

                                       14

 
          (b)  If, as of an applicable Option Strike Date, the Target Amount for
               such Option Strike Date has not been redeemed and/or converted
               (or noticed for conversion and/or redemption on such Option
               Strike Date) as a result of Series Three Preferred Unit holders
               and/or the General Partner exercising Redemption Rights pursuant
               to Section 5 and/or such holders exercising their conversion
               rights pursuant to this Section 7, the Partnership, at the
               election of the General Partner and subject to and upon
               compliance with the provisions of this Section 7, may convert (a
               "Forced Conversion") not more than the lesser of (A) the Target
               Amount in respect of such Option Strike Date or (B) such number
               of Series Three Preferred Units as shall have an aggregate
               Liquidation Preference equal to the excess of (i) the aggregate
               Liquidation Preference of the sum of the Target Amounts for all
               prior Option Strike Dates and the currently applicable Option
               Strike Date over (ii) the aggregate Liquidation Preference of all
               Series Three Preferred Units previously converted, noticed for
               conversion by the holders on such Option Strike Date, previously
               redeemed, and noticed for redemption on such Option Strike Date
               (the "Forced Conversion Amount") of Series Three Preferred Units
               into a number of Common Units determined in accordance with the
               Conversion Price in effect on such date as determined in
               accordance with subsection (a) by transmitting for delivery a
               Conversion Notice, in the manner prescribed in Section 12 within
               one business day after the applicable Option Strike Date, to the
               holders of the Series Three Preferred Units which are to be so
               converted (the "Forced Conversion Option") ratably in proportion
               to the Series Three Preferred Units then outstanding from the
               holders thereof (after giving effect to the redemptions and
               conversions otherwise noticed to occur on such Option Strike
               Date); provided, further, however, that such Forced Conversion
               Option may only be exercised by the Partnership if the value of
               the REIT Shares, calculated on their weighted average closing
               price during the 10 Trading Days prior to the second Trading Day
               preceding the exercise of the Forced Conversion Option, is equal
               to or greater than 110% of the Conversion Price.

          (c)  Immediately prior to any conversion of Series Three Preferred
               Units, the Partnership shall pay, in cash, all accumulated and
               unpaid distributions including the further preferential
               distributions provided in Section 3(f) through the Conversion
               Date on all Series Three Preferred Units. A holder of Series
               Three Preferred Units shall have no right with respect to any
               Series Three Preferred Units so converted to receive any
               distributions paid after the Conversion Date with respect to such
               Series Three Preferred Units and his interest in the Partnership
               as to such converted Units shall be terminated; provided,
               however, that in the event the Partnership is legally or
               contractually prohibited from paying, or

                                       15

 
               fails for any other reason to pay, such accumulated and unpaid
               distributions prior to any conversion and such holder elects to
               continue with and permit such conversion after notice from the
               Partnership of such inability or failure, such holder shall still
               be entitled to receive all such accumulated and unpaid
               distributions, if any, that remain unpaid after such conversion,
               as well as a further preferential distribution on such unpaid
               distributions as provided in Section 3(f), which distributions
               shall be paid by the Partnership as soon as it is legally and
               contractually permitted to do so.

          (d)  After the conversion of Series Three Preferred Units as 
               aforesaid, the Partnership shall deliver to such holder, upon his
               written request, a certificate of the General Partner certifying
               the number of Common Units and Preferred Units held by such
               person immediately after such conversion.

               Each conversion shall be deemed to have been effected immediately
               prior to the close of business on the date (the "Conversion
               Date") specified in the Conversion Notice (which shall not be
               earlier than 5 days after mailing of the Conversion Notice nor
               later than sixty (60) days after such date) or upon the Option
               Strike Date in the case of a Forced Conversion pursuant to
               Section 7(b) and the Series Three Preferred Units so presented
               for conversion shall be deemed converted into Common Units at the
               close of business on such date, and such conversion shall be in
               accordance with the Conversion Price in effect on such date
               (unless such day is not a Business Day, in which event such
               conversion shall be deemed to have become effective at the close
               of business on the next succeeding Business Day) as determined in
               accordance with subsection (a).

          (e)  No fractions of Common Units shall be issued upon conversion of
               the Series Three Preferred Units. Instead of any fractional
               interest in a Common Unit that would otherwise be deliverable
               upon the conversion of a Series Three Preferred Unit, the
               Partnership shall pay to the holder of such Series Three
               Preferred Unit an amount in cash based upon the Current Market
               Price of Common Units on the Trading Day immediately preceding
               the date of conversion. If more than one Series Three Preferred
               Unit shall be surrendered for conversion at one time by the same
               holder, the number of full Common Units issuable upon conversion
               thereof shall be computed on the basis of the aggregate number of
               Series Three Preferred Units so surrendered.

          (f)  The Assignee of any Limited Partner pursuant to Section 11 of the
               main part of the Partnership Agreement may exercise the rights 
               of such

                                       16

 
               Limited Partner pursuant to this Section 7, and such Limited
               Partner shall be deemed to have assigned such rights to such
               Assignee and shall be bound by the exercise of such rights by the
               Assignee.

          (g)  The Conversion Price shall be adjusted from time to time as
               follows:

               (i)  If the Partnership shall after the Issue Date (A) pay or
                    make a distribution to holders of its Common Units in Common
                    Units, (B) subdivide its outstanding Common Units into a
                    greater number of Common Units, (C) combine its outstanding
                    Common Units into a smaller number of Common Units or (D)
                    issue any Common Units by reclassification of its Common
                    Units, the Conversion Price in effect at the opening of
                    business on the day following the date fixed for the
                    determination of Common Unit holders entitled to receive
                    such distribution or at the opening of business on the day
                    following the day on which such subdivision, combination or
                    reclassification becomes effective, as the case may be,
                    shall be adjusted so that the holder of any Series Three
                    Preferred Unit thereafter surrendered for conversion shall
                    be entitled to receive the number of Common Units that such
                    holder would have owned or have been entitled to receive
                    after the happening of any of the events described above had
                    such Series Three Preferred Units been converted immediately
                    prior to the record date in the case of a distribution or
                    the effective date in the case of a subdivision,
                    combination, or reclassification. An adjustment made
                    pursuant to this subsection (g)(i) shall become effective
                    immediately after the opening of business on the day next
                    following the record date in the case of a distribution and
                    shall become effective immediately after the opening of
                    business on the day next following the effective date in the
                    case of a subdivision, combination, or reclassification and
                    automatically without any further required action of the
                    Partnership or the Series Three Preferred Unit holders.

               (ii) If the Partnership shall issue after the Issue Date rights,
                    options or warrants to all holders of Common Units entitling
                    them to subscribe for or purchase Common Units (or
                    securities convertible into or exchangeable for Common
                    Units) at a price per Common Unit less than the Fair Market
                    Value per Common Unit on the record date for the
                    determination of Common Unit holders entitled to receive
                    such rights, options or warrants, then the Conversion Price
                    in effect at the opening of business on the day next
                    following such record date shall be adjusted to equal the
                    price determined by multiplying (I) the Conversion Price in
                    effect

                                       17

 
                    immediately prior to the opening of business on the day
                    following the record date fixed for such determination by
                    (II) a fraction, the numerator of which shall be the sum of
                    (A) the number of Common Units outstanding on the close of
                    business on the record date fixed for such determination and
                    (B) the number of Common Units that the aggregate proceeds
                    to the Partnership from the exercise of such rights, options
                    or warrants for Common Units would purchase at such Fair
                    Market Value, and the denominator of which shall be the sum
                    of (A) the number of Common Units outstanding on the close
                    of business on the date fixed for such determination and (B)
                    the number of additional Common Units offered for
                    subscription or purchase pursuant to such rights, options or
                    warrants. Such adjustment shall become effective immediately
                    upon the opening of business on the day next following such
                    record date (subject to paragraph (l) below). In determining
                    whether any rights, options or warrants entitle the holders
                    of Common Units to subscribe for or purchase Common Units at
                    less than such Fair Market Value, there shall be taken into
                    account any consideration received by the Partnership upon
                    issuance and upon exercise of such rights, options or
                    warrants, the value of such consideration, if other than
                    cash, to be determined in good faith by the General Partner.

              (iii) If the Partnership shall distribute to all holders of its
                    Common Units any Partnership Units (other than Common Units)
                    or evidence of its indebtedness or assets (excluding cash
                    distributions to the extent that after giving effect to such
                    distributions the fair market value of the assets of the
                    Partnership exceed the sum of the liabilities of the
                    Partnership, as determined in good faith by the General
                    Partner) or rights or warrants to subscribe for or purchase
                    any of its securities (excluding those rights and warrants
                    issued to all holders of Common Units entitling them to
                    subscribe for or purchase Common Units or securities
                    convertible into or exchangeable for Common Units, which
                    rights and warrants and convertible or exchangeable
                    securities are referred to in and treated under subparagraph
                    (ii) above) (any of the foregoing being hereinafter in this
                    subparagraph (iii) called the "Securities"), then in each
                    case the Conversion Price shall be adjusted so that it shall
                    equal the price determined by multiplying (I) the Conversion
                    Price in effect immediately prior to the close of business
                    on the date fixed for the determination of Unit holders
                    entitled to receive such distribution by (II) a fraction,
                    the numerator of which shall be the Fair Market Value per
                    Unit of the Common Units on the record

                                       18

 
                    date mentioned below less the then fair market value (as
                    determined by the General Partner in good faith) of the
                    portion of the Units or assets or evidences of indebtedness
                    so distributed or of such rights or warrants applicable to
                    one Common Unit, and the denominator of which shall be the
                    Fair Market Value per Unit of the Common Units on the record
                    date mentioned below. Such adjustment shall become effective
                    immediately upon the opening of business on the day next
                    following the record date for the determination of Unit
                    holders entitled to receive such distribution (subject to
                    paragraph (l) below). For the purposes of this subparagraph
                    (iii), the distribution of a Security, which is distributed
                    not only to the holders of the Common Units on the date
                    fixed for the determination of Unit holders entitled to such
                    distribution of such Security, but also is required to be
                    distributed with each Common Unit delivered to a person
                    converting a Series Three Preferred Unit after such
                    determination date, shall not require an adjustment of the
                    Conversion Price pursuant to this subparagraph (iii);
                    provided that on the date, if any, on which a person
                    converting a Series Three Preferred Unit would no longer be
                    entitled to receive such Security with a Common Unit (other
                    than as a result of the termination of all such Securities),
                    a distribution of such Securities shall be deemed to have
                    occurred, and the Conversion Price shall be adjusted as
                    provided in this subparagraph (iii) (and such day shall be
                    deemed to be "the date fixed for the determination of the
                    Unit holders entitled to receive such distribution" and "the
                    record date" within the meaning of the two preceding
                    sentences).

               (iv) Notwithstanding the foregoing, no adjustment shall be made
                    pursuant to the preceding clauses (ii) and (iii) that would
                    result in any increase in the Conversion Price. No
                    adjustment in the Conversion Price shall be required unless
                    such adjustment would require a cumulative increase or
                    decrease of at least 1% in such price; provided, however,
                    that any adjustments that by reason of this subsection
                    (g)(iv) are not required to be made shall be carried forward
                    and taken into account in any subsequent adjustment until
                    made; and provided, further, that any adjustment shall be
                    required and made in accordance with the provisions of this
                    Section 7 (other than this subsection (g)(iv)) not later
                    than such time as may be required in order to preserve the
                    tax-free nature of a distribution to the holders of Common
                    Units. Notwithstanding any other provisions of this Section
                    7, the Partnership shall not be required to make any
                    adjustment of the Conversion Price for the issuance of any
                    Common Units pursuant

                                       19

 
                    to any employee benefit or compensation plan or other plan
                    providing for the reinvestment of distributions or interest
                    payable on securities of the Partnership and the investment
                    of additional optional amounts in Common Units under such
                    plan (or the issuance of any Common Units to the General
                    Partner in respect of a capital contribution by it resulting
                    from an analogous sale of its securities). All calculations
                    under this Section 7 shall be made to the nearest cent (with
                    $.005 being rounded upward) or to the nearest one-tenth of a
                    Unit (with .05 of a Unit being rounded upward), as the case
                    may be. Anything in this paragraph (g) to the contrary
                    notwithstanding, the Partnership shall be entitled, to the
                    extent permitted by law, to make such adjustments in the
                    Conversion Price (but without adversely affecting the
                    economic value of a Series Three Preferred Unit), in
                    addition to those required by this paragraph (g), as it in
                    its discretion shall determine to be advisable in order that
                    any Series Three Preferred Unit distributions, subdivision
                    of Series Three Preferred Units, reclassification or
                    combination of Series Three Preferred Units, distribution of
                    rights, options or warrants to purchase stock or securities,
                    or a distribution of other assets (other than cash
                    distributions) hereafter made by the Partnership to the
                    holders of the Series Three Preferred Units shall not be
                    taxable.

          (h)  If the Partnership or the General Partner shall be a party to any
               transaction (including without limitation a merger,
               consolidation, unit exchange, self tender offer for all or
               substantially all Common Units, sale of all or substantially all
               of the Partnership's assets or recapitalization of the Common
               Units and excluding any transaction as to which subparagraph
               (g)(i) of this Section 7 applies) (each of the foregoing being
               referred to herein as a "Transaction"), in each case as a result
               of which Common Units shall be exchanged for or converted into
               the right, or the holders of such Units shall otherwise be
               entitled, to receive securities or other property (including cash
               or any combination thereof), each Series Three Preferred Unit
               shall upon the commencement of the Conversion Period be
               convertible into the kind and amount of Units or securities and
               other property (including cash or any combination thereof) (the
               "Per Series Three Preferred Unit Merger Consideration")
               receivable upon the consummation of such Transaction by a holder
               of that number of Common Units into which one Series Three
               Preferred Unit was convertible immediately prior to such
               Transaction (unless, in connection with such Transaction, the
               Series Three Preferred Units had been converted into the right to
               receive such consideration (and thus, are no longer
               outstanding)), assuming such holder of Common Units is not a
               Person with which the Partnership consolidated or into which the

                                       20

 
               Partnership merged or which merged into the Partnership or to
               which such sale or transfer was made, as the case may be (a
               "Constituent Person"), or an affiliate of a Constituent Person.
               In the event that holders of Common Units have the opportunity to
               elect the form or type of consideration to be received upon
               consummation of the Transaction, prior to such transaction the
               General Partner shall give prompt written notice to each Series
               Three Preferred Unit holder of such election, and each Series
               Three Preferred Unit holder shall also have the right to elect,
               by written notice to the General Partner, the form or type of
               consideration to be received upon conversion of each Series Three
               Preferred Unit held by such holder following consummation of such
               Transaction, and after such election the consideration thereby
               elected shall be the "Per Series Three Preferred Unit Merger
               Consideration" for each Series Three Preferred Unit held by such
               holder or any transferee thereof. If a holder of Series Three
               Preferred Units fails to make such an election, such holder (and
               any of its transferees) shall receive upon conversion of each
               Series Three Preferred Unit held by such holder (or by any of its
               transferees) the same Per Series Three Preferred Unit Merger
               Consideration that a holder of that number of Common Units into
               which one Series Three Preferred Unit was convertible immediately
               prior to such Transaction would receive if such Common Unit
               holder failed to make such an election.

                    The Partnership shall not be a party to any Transaction
               unless the terms of such Transaction are consistent with the
               provisions of this paragraph (h), and it shall not consent or
               agree to the occurrence of any Transaction until the Partnership
               has entered into an agreement with the successor or purchasing
               entity, as the case may be, for the benefit of the holders of the
               Series Three Preferred Units that will contain provisions
               enabling the holders of the Series Three Preferred Units that
               remain outstanding after such Transaction to convert their Series
               Three Preferred Units into the consideration provided for herein
               and that shall preserve the distribution preference, conversion,
               redemption, and other rights set forth in this Certificate.

          (i)   If:

               (i)  the Partnership shall declare a distribution on the Common
                    Units (excluding cash distributions to the extent that after
                    giving effect to such distributions the fair market value of
                    the assets of the Partnership exceed the sum of the
                    liabilities of the Partnership, as determined in good faith
                    by the General Partner); or

                                       21

 
              (ii)  the Partnership shall authorize the granting to the holders
                    of the Common Units of rights or warrants to subscribe for
                    or purchase any Units of any class or any other rights or
                    warrants; or

             (iii)  there shall be any reclassification of the Common Units
                    (other than an event to which subparagraph (g)(i) of this
                    Section 7 applies) or any consolidation or merger to which
                    the Partnership is a party and for which approval of any
                    Unit holders of the Partnership is required, or a unit
                    exchange involving the conversion or exchange of Common
                    Units into securities or other property, or a self tender
                    offer by the Partnership for all or substantially all of its
                    outstanding Common Units, or the sale or transfer of all or
                    substantially all of the assets of the Partnership as an
                    entirety and for which approval of any Unit holders of the
                    Partnership is required; or

              (iv)  if there shall occur the voluntary or involuntary
                    liquidation, dissolution or winding up of the Partnership;

               then the Partnership shall cause to be mailed to the holders of
               the Series Three Preferred Units at their addresses as shown on
               the records of the Partnership, as promptly as possible, but at
               least 15 days prior to the applicable date hereinafter specified,
               a notice stating (A) the date on which a record is to be taken
               for the purpose of such distribution or granting of rights or
               warrants, or, if a record is not to be taken, the date as of
               which the holders of Common Units of record to be entitled to
               such distribution or granting of rights or warrants are to be
               determined or (B) the date on which such reclassification,
               consolidation, merger, unit exchange, sale, transfer,
               liquidation, dissolution or winding up is expected to become
               effective, and the date as of which it is expected that holders
               of Common Units of record shall be entitled to exchange their
               Common Units for securities or other property, if any,
               deliverable upon such reclassification, consolidation, merger,
               unit exchange, sale, transfer, liquidation, dissolution or
               winding up. Failure to give or receive such notice or any defect
               therein shall not affect the legality or validity of the
               proceedings described in this Section 7.

          (j)  In the event that a Cash Business Combination is to be 
               consummated or proposed to the holders of Common Units, the
               notice referred to in subparagraph (i)(iii) above shall specify
               such fact and such notice shall be mailed to the holders of the
               Series Three Preferred Units simultaneously with the mailing of
               notice to holders of Common Units of the holding of a meeting or
               written consent or making of elections with respect to the Cash
               Business Combination. In such event, the holders of

                                       22

 
               Series Three Preferred Units shall be permitted to tender their
               Series Three Preferred Units for conversion, in accordance with
               Section 7 hereof, and may condition such tender upon the
               consummation of such Cash Business Combination. Any such
               conversion of Series Three Preferred Units shall happen
               simultaneously with the consummation of the Cash Business
               Combination such that holders of Series Three Preferred Units
               receive, at the consummation of the Cash Business Combination,
               the consideration described in Section 7(h).

          (k)  Whenever the Conversion Price is adjusted as herein provided, the
               Partnership shall promptly file in the books and records of the
               Partnership and provide to each holder an officer's certificate
               setting forth the Conversion Price after such adjustment as
               required by the terms hereof and setting forth a brief statement
               of the facts requiring such adjustment, which certificate shall
               be conclusive evidence of the correctness of such adjustment
               absent manifest error. Promptly after filing of such certificate,
               the Partnership shall prepare a notice of such adjustment of the
               Conversion Price setting forth the adjusted Conversion Price and
               the effective date such adjustment becomes effective and shall
               mail such notice of such adjustment of the Conversion Price to
               the holders of each Series Three Preferred Unit at such holder's
               last address as shown on the records of the Partnership.

          (l)  In any case in which paragraph (g) of this Section 7 provides 
               that an adjustment shall become effective on the day next
               following the record date for an event, the Partnership may defer
               until the occurrence of such event (A) issuing to the holder of
               any Series Three Preferred Unit converted after such record date
               and before the occurrence of such event the additional Common
               Units issuable upon such conversion by reason of the adjustment
               required by such event over and above the Common Units issuable
               upon such conversion before giving effect to such adjustment and
               (B) paying to such holder any amount of cash in lieu of any
               fractional Common Unit.

          (m)  There shall be no adjustment of the Conversion Price in case of
               the issuance of any Units in a reorganization, acquisition or
               other similar transaction except as specifically set forth in
               this Section 7. If any action would require adjustment of the
               Conversion Price pursuant to more than one paragraph of this
               Section 7, only one adjustment shall be made, and such adjustment
               shall be the amount of adjustment that has the highest absolute
               value; provided, however, that multiple actions taken at or about
               the same time shall be subject to separate adjustments.

                                       23

 
          (n)  If the Partnership shall take any action affecting the Common
               Units, other than action described in this Section 7, that in the
               opinion of the General Partner would materially adversely affect
               the conversion rights of the holders of the Series Three
               Preferred Units, the Conversion Price for the Series Three
               Preferred Units may be adjusted, to the extent permitted by law,
               in such manner, if any, and at such time, as the General Partner,
               in its sole discretion, may determine to be equitable in the
               circumstances.

     (8)  Voting Rights.
          ------------- 

          (a)  Holders of the Series Three Preferred Units will not have any
               voting rights, except as set forth below or as otherwise from
               time to time required by law.

          (b)  So long as any Series Three Preferred Units remain outstanding,
               the Partnership shall not, without the affirmative vote of the
               holders of at least a majority of the Series Three Preferred
               Units outstanding at the time, given in person or by proxy,
               either in writing or at a meeting (voting separately as a class),
               amend, alter or repeal the provisions of the Partnership
               Agreement, increase the number of authorized Series Three
               Preferred Units or create any additional class or series of
               Preferred Units, whether by merger, consolidation or otherwise,
               so as to materially and adversely affect any right, preference,
               privilege or voting power of the Series Three Preferred Units or
               the holders thereof in their capacity as holders of Series Three
               Preferred Units; but subject, in any event, to the following
               provisions:

               (i)  With respect to the occurrence of any merger, consolidation
                    or other business combination or reorganization, so long as
                    the Series Three Preferred Units remain outstanding with the
                    terms thereof materially unchanged or, if the Partnership is
                    not the surviving entity in such transaction, are exchanged
                    for a security of the surviving entity with terms that are
                    materially the same with respect to rights to distributions,
                    voting, redemption and conversion as the Series Three
                    Preferred Units and without any income, gain or loss
                    expected to be recognized by the holder upon the exchange
                    for federal income tax purposes (and with the terms of the
                    Common Units or such other securities for which the Series
                    Three Preferred Units (or the substitute security therefor)
                    are convertible materially the same with respect to rights
                    to distributions, voting, redemption and conversion), the
                    occurrence of any such event shall not be deemed to
                    materially and adversely affect such rights, preferences,
                    privileges or voting powers of the holders of the Series
                    Three Preferred Units.

                                       24

 
              (ii)  Any creation or issuance of any Common Units or of any class
                    or series of Preferred Units, in each case ranking junior to
                    the Series Three Preferred Units with respect to payment of
                    distributions, redemption rights and the distribution of
                    assets upon liquidation, dissolution or winding up, shall
                    not be deemed to materially and adversely affect such
                    rights, preferences, privileges or voting powers of the
                    holders of the Series Three Preferred Units.

             (iii)  Any creation or issuance of any series of Preferred Units
                    (other than an issuance of additional Series Three Preferred
                    Units, as to which a class vote shall be required; provided
                    that no class vote shall be required for any issuance of
                    Series Three Preferred Units in connection with or as
                    contemplated by any of the Source Agreements), or any
                    increase in the amount of authorized Units of such series,
                    in each case ranking on a parity with the Series Three
                    Preferred Units with respect to payment of distributions,
                    voting, redemption and the distribution of assets upon
                    liquidation, dissolution or winding up, shall not be deemed
                    to materially and adversely affect such rights, preferences,
                    privileges or voting powers of the holders of the Series
                    Three Preferred Units if such issuance is done (x) in
                    connection with an issuance of Partnership Units in exchange
                    for non-cash assets (including, without limitation, (i)
                    securities, partnership interests, membership interests or
                    other interests in an entity and (ii) real estate, personal
                    property and intangibles), or to the Company following the
                    issuance of securities by it for such non-cash assets and
                    the contribution of such non-cash assets to the Partnership
                    or (y) in connection with a bona fide capital raising
                    transaction or to the Company in consideration of a cash
                    contribution to the Partnership following a sale of
                    preferred stock by the General Partner in a bona fide
                    capital raising transaction.

               (iv) Any creation or issuance of any class or series of Preferred
                    Units ranking senior to the Series Three Preferred Units
                    with respect to the payment of distributions, redemption
                    rights and the distribution of assets upon liquidation,
                    dissolution or winding up, to the extent the issuance of
                    such Units was in compliance with the standard set forth in
                    Section 9(c) hereof, shall not be deemed to materially and
                    adversely affect such rights, preferences, privileges or
                    voting powers of the holders of the Series Three Preferred
                    Units.

                                       25

 
                (c) In addition to the voting rights granted in paragraph (b)
                    above, the holders of Series Three Preferred Units shall be
                    entitled to vote at any time that the Limited Partners are
                    entitled to vote according to the Partnership Agreement. The
                    Series Three Preferred Units shall be entitled to vote the
                    same number of votes as the Common Units into which they may
                    be converted and shall vote with the Holders of Common Units
                    as a single class with the Common Units.

                (d) The foregoing voting provisions will not apply if, at or 
                    prior to the time when the act, with respect to which such
                    vote would otherwise be required, will be effected, all
                    outstanding Series Three Preferred Units shall have been
                    converted and/or redeemed.

     (9) Ranking.  The Series Three Preferred Units shall be deemed to rank:
         -------                                                            

                (a) Senior to any class or series of Units of the Partnership,
                    if such class or series shall be Common Units or if the
                    holders of Series Three Preferred Units shall be entitled to
                    receipt of distributions or of amounts distributable upon
                    liquidation, dissolution or winding up, as the case may be,
                    in preference or priority to the holders of Units of such
                    class or series, including Junior Preferred Units ("Junior
                    Units");

                (b) On a parity with the Series One Preferred Units, the Series 
                    Two Preferred Units and with any other class or series of
                    Units of the Partnership, if the holders of such other class
                    or series of Unit and the Series Three Preferred Units shall
                    be entitled to the receipt of distributions and of amounts
                    distributable upon liquidation, dissolution or winding up in
                    proportion to their respective amounts of accrued and unpaid
                    distributions per Unit or liquidation preferences, without
                    preference or priority one over the other ("Parity Units");
                    and

                (c) Junior only to (I) any indebtedness issued by the
                    Partnership and (II) senior preferred units issued only to
                    the General Partner having the same distribution rate, term,
                    preferences and other material terms (including conversion
                    rights) as preferred shares of stock (A) issued only for
                    cash by the General Partner in a public offering, or (B)
                    issued only for cash or property in an arm's length
                    transaction (x) to one or more institutional investors who
                    are (but for the preferred shares so issued) not affiliated
                    with the Partnership, the General Partner or any Affiliate
                    (as defined in Section 10) thereof and (y) not in connection
                    with any other transaction or transactions with any of such
                    Affiliates and (z) which would be permitted by Section 10 if
                    such preferred shares were Junior Preferred Units, and (C)
                    in either case, the entire cash proceeds (net of any arm's
                    length commissions paid to third parties who are not
                    Affiliates) of which

                                       26

 
                    are contributed by the General Partner to the Partnership
                    and used by the Partnership solely for (i) the acquisition
                    of assets to be held in the Partnership's business, (ii)
                    capital expenditures or maintenance expenses in respect of
                    assets held by the Partnership, (iii) other ordinary course
                    expenses of the Partnership, or (iv) repayment of
                    indebtedness of the Partnership (including indebtedness
                    convertible into Junior Preferred Units or Common Units),
                    and (v) none of which proceeds are used (AA) to purchase,
                    redeem, retire or otherwise acquire directly or indirectly
                    any Junior Preferred Units or Common Units, or shares of
                    preferred stock junior to the Series A Preferred Stock of
                    the General Partner, or common stock of the General Partner,
                    or options, warrants, rights to purchase or any other
                    securities convertible into the foregoing (other than debt
                    repayable pursuant to subclause (iv)) or (BB) to make
                    distributions or to pay dividends in respect of any
                    securities described in subclause (AA). Any references to
                    the term "Affiliate" in this Section 9(c) (including by way
                    of the cross-reference and incorporation in clause (z) of
                    the preceding sentence) shall have the meaning given thereto
                    in the Amended and Restated By-laws of the General Partner
                    as of the date hereof (except that the 5% threshold referred
                    to therein shall be deemed for these purposes to be a 10%
                    threshold).

     (10) Junior Preferred Units.  The Partnership may, at its option, issue
          ----------------------                                            
          Junior Preferred Units in exchange for arm's length consideration, the
          adequacy of such consideration to be determined in good faith by the
          Board of Directors of the General Partner; provided, however, that the
          Partnership may not, without the consent of holders of a majority of
          the Series Three Preferred Units, (i) issue Junior Preferred Units to
          any Affiliate (as such term is defined in the Amended and Restated By-
          Laws of the General Partner as of the date hereof) of the General
          Partner or the Partnership, (ii) distribute Junior Preferred Units to
          any holder of Common Units, (iii) issue Junior Preferred Units ratably
          to holders of Common Units for cash or any other consideration, or
          (iv) issue Junior Preferred Units in exchange for Common Units.
          Notwithstanding the foregoing, in connection with the General
          Partner's issuance of preferred shares of stock, the Partnership may
          issue Junior Preferred Units to the General Partner having the same
          distribution rate, term, preferences and other material terms as such
          preferred shares, provided the issuance of such preferred shares would
          not violate this Section 10 if such shares were Junior Preferred Units
          and such issuance would comply with the requirements of Section 9 (c)
          (II) if they were senior preferred shares (but without giving effect
          to the word "institutional" in clause (B)(x) of Section 9(c)(II)).

     (11) Allocation of Nonrecourse Debt.  The provisions of that certain Tax
          ------------------------------                                     
          Reporting Agreement (including but not limited to paragraphs 3 and 4
          thereof) dated the

                                       27

 
          date hereof among the Partnership and such holders are hereby
          incorporated herein by reference.

     (12) Notices.  All notices, demand, requests or other communications which
          -------                                                              
          may be or are required to be given, served or sent hereunder will be
          in writing and delivered by certified U.S. mail, return receipt
          required, with postage prepaid, or by nationally recognized overnight
          courier service that provides tracking and proof of receipt. Notices
          shall be deemed delivered upon the earlier of (i) delivery, (ii)
          refusal of delivery by addressee, (iii) two Business Days after
          deposit in the U.S. Mails in the case of certified U.S. mail, or (iv)
          one Business Day after deposit with a nationally recognized overnight
          courier. Notices to Series Three Preferred Unit holders shall be sent
          to their address of record with the Partnership. Any Series Three
          Preferred Unit holder may change its address of record by written
          notice as given as aforesaid. Notices delivered to the Partnership
          shall be addressed to Boston Properties Limited Partnership, Attn.:
          Chief Financial Officer, 8 Arlington Street, Boston, MA 02116 or to
          such other address as the Partnership may have notified holders in the
          manner provided in this Section 12. Notices to be delivered to the
          General Partner shall be addressed to Boston Properties, Inc., Attn:
          Chief Financial Officer, 8 Arlington Street, Boston, MA 02116, or to
          such other address as the General Partner may have notified holders in
          the manner provided in this Section 12.

     (13) Section 8.6.C of Partnership Agreement.  The provisions of Section 
          -------------------------------------- 
          8.6.C of the main part of the Partnership Agreement shall not apply to
          Series Three Preferred Units tendered or required to be tendered
          pursuant to Section 5, which shall control over any other provision of
          the Partnership Agreement. The provisions of Section 8.6.C of the
          Partnership Agreement also shall not apply to any Common Units that
          may be issued upon a conversion of Series Three Preferred Units
          ("Conversion Units"). For clarity, it is noted that the effect of this
          provision is that the restriction on the Redemption Right set forth in
          Section 8.6.C of the main part of the Partnership Agreement shall not
          apply to Conversion Units such that if a holder of a Conversion Unit
          presents a Conversion Unit for redemption and the delivery of REIT
          Shares to such holder is prohibited under the Certificate of
          Incorporation of the Company because such delivery would cause such
          holder to violate the Ownership Limit, then (i) the Company may not
          exercise its rights under Section 8.6.B to acquire such Conversion
          Unit for the REIT Shares Amount unless the Company waives or modifies
          the Ownership Limit applicable to such holder and (ii) if the Company
          does not so waive or modify the Ownership Limit then the Partnership
          must pay such holder the applicable Cash Amount to redeem such
          holder's Conversion Unit.

     (14) In the event this Certificate of Designations is amended or modified
          by the parties hereto, the holders of the Series Two Preferred Units
          issued by the

                                       28

 
          Partnership and the Series A Preferred Stock issued by the General
          Partner in accordance with the Source Agreements shall each have the
          right to elect, by vote of a majority-in-interest of such securities,
          to adopt amendments or modifications of their respective securities
          comparable to the amendments or modifications of this Certificate, and
          in the event of any modification or amendment of such securities, the
          holders of Series Three Preferred Units shall have the right to elect,
          by vote of a majority-in-interest of the Series Three Preferred Units,
          to adopt amendments or modifications of this Certificate of
          Designations comparable to amendments and modifications of such
          securities. The Partnership and the General Partner agree for the
          benefit of the holders of Series Three Preferred Units that neither of
          them shall permit the amendment or modification of such other
          securities without causing this Section 14 to be given full effect,
          and the Partnership and the General Partner shall take such action as
          is reasonably appropriate or necessary to give full effect to this
          Section 14.

                                       29

 
     IN WITNESS WHEREOF, Boston Properties, Inc., as General Partner of the
Partnership, has caused this Certificate of Designations to become effective,
and the Partnership Agreement is hereby amended by giving effect to the terms
set forth herein.

                                    BOSTON PROPERTIES, INC.


                                    By: /s/ William J. Wedge
                                       ---------------------------------
                                    Name:  William J. Wedge
                                    Title: Senior Vice President 



                                       30

 
             Exhibit A to the Certificate of Designations for the
                         Series Three Preferred Units


                    NOTICE OF ELECTION BY PARTNER TO CONVERT
                 SERIES THREE PREFERRED UNITS INTO COMMON UNITS


     The undersigned Series Three Preferred Unit holder hereby (i) elects to
convert the number of Series Three Preferred Units in Boston Properties Limited
Partnership (the "Partnership") set forth below into Common Units in accordance
with the terms of the Second Amended and Restated Agreement of Limited
Partnership of the Partnership and the Certificate of Designations relating to
the Series Three Preferred Units that is a part thereof; and (ii) directs that
any cash in lieu of fractional Common Units that may be deliverable upon such
conversion be delivered to the address specified below.  The undersigned hereby
represents, warrants, and certifies that the undersigned (a) has title to such
Series Three Preferred Units, free and clear of the rights or interests of any
other person or entity other than the Partnership; (b) has the full right,
power, and authority to cause the conversion of such Series Three Preferred
Units as provided herein; and (c) has obtained the consent or approval of all
persons or entities, if any, having the right to consent or approve such
conversion.


Name of Series Three Preferred Unit holder: ___________________________________
                                            (Please Print: Exact Name as 
                                            Registered with Partnership)


Date of this Notice: _____________________________________


Date the Series Three Preferred Units are to be converted: ________________/1/


Number of Series Three Preferred Units to be converted: ______________________



                                     _________________________________________ 
                                     (Signature of Limited Partner: Sign Exact
                                     Name as Registered with Partnership)


                                     _________________________________________  
                                     (Street Address)



                                     _________________________________________ 
                                     (City)          (State)        (Zip Code)


                                     Signature Guaranteed by:


                                     _________________________________________ 

- -------------------
/1/ Not earlier than 15 days nor later than 60 days after the date this
Notice is deposited in the U.S. mails (certified mail, postage prepaid, return
receipt requested) or deposited with a nationally recognized overnight courier
guaranteeing next business day delivery.
 

                                       31

 
             Exhibit B to the Certificate of Designations for the
                         Series Three Preferred Units


                    NOTICE OF ELECTION BY PARTNER TO REDEEM
                     SERIES THREE PREFERRED UNITS FOR CASH


     The undersigned Series Three Preferred Unit holder hereby (i) elects to
redeem the number of Series Three Preferred Units in Boston Properties Limited
Partnership (the "Partnership") set forth below for the redemption price
determined in accordance with the terms of the Second Amended and Restated
Agreement of Limited Partnership of the Partnership and the Certificate of
Designations (the "Certificate") relating to the Series Three Preferred Units
that is a part thereof; and (ii) directs that such redemption price be delivered
by certified check to the address specified below.  The undersigned hereby
represents, warrants, and certifies that the undersigned (a) has title to such
Series Three Preferred Units, free and clear of the rights or interests of any
other person or entity other than the Partnership; (b) has the full right,
power, and authority to cause the redemption of such Series Three Preferred
Units as provided herein; and (c) has obtained the consent or approval of all
persons or entities, if any, having the right to consent or approve such
redemption.  The undersigned hereby acknowledges that, except as provided in the
Certificate,  distributions on the Series Three Preferred Units to be redeemed
shall cease to accrue on the redemption date indicated below.


Name of Series Three Preferred Unit holder: ___________________________________
                                            (Please Print: Exact Name as 
                                            Registered with Partnership)


Date of this Notice: _____________________________________


Option Strike Date on which the
Series Three Preferred Units are to be redeemed: ______________________


Number of Series Three Preferred Units to be converted: ______________________



                                     _________________________________________ 
                                     (Signature of Limited Partner: Sign Exact
                                     Name as Registered with Partnership)


                                     _________________________________________  
                                     (Street Address)



                                     _________________________________________ 
                                     (City)          (State)        (Zip Code)


                                     Signature Guaranteed by:


                                     _________________________________________ 

 

Note:  Redemptions are subject to reduction and proration as provided in the
       Certificate of Designations and the Partnership Agreement in respect of
       the Series Three Preferred Units.

                                       32

 
                                                                   EXHIBIT 99.26

                                    FORM OF

                          CERTIFICATE OF DESIGNATIONS

                                      OF

              THE SERIES A CONVERTIBLE REDEEMABLE PREFERRED STOCK

                                      OF

                            BOSTON PROPERTIES, INC.

                               ________________

     Boston Properties, Inc., a corporation organized and existing under the
laws of the State of Delaware (the "Corporation"), does hereby certify:

     That, pursuant to authority conferred upon the Board of Directors of the
Corporation by the Amended and Restated Certificate of Incorporation of said
Corporation, and pursuant to the provisions of Section 151 the Delaware General
Corporation Law, said Board of Directors, at a meeting duly held on September
__, 1998, adopted a resolution providing for the designations, preferences and
relative, participating, optional or other rights, and the qualifications,
limitations or restrictions thereof, of a series of preferred stock, which
resolution is as follows:

     RESOLVED, that pursuant to the authority vested in the Board of Directors
of the Corporation in accordance with the provisions of the Amended and Restated
Certificate of Incorporation of the Corporation, a series of preferred stock of
the Corporation designated as Series A Convertible Redeemable Preferred Stock
be, and it hereby is, created and authorized, and the issuance thereof is
provided for, and that the designation and number of shares, and relative
rights, preferences and powers thereof, shall be as set forth in the form
appended hereto as Exhibit A.
                   --------- 

     IN WITNESS WHEREOF, Boston Properties, Inc. has caused this certificate to
be executed in its name and on its behalf by its _____________ as of this ___
day of ______, 1998.

                               BOSTON PROPERTIES, INC.

                               By: 
                                   -------------------------
                                   Name:
                                   Title:

 
                                   EXHIBIT A
                                   ---------

(1)  Designation and Number.  A series of Preferred Stock, designated the
     ----------------------                                              
     "Series A Convertible Redeemable Preferred Stock" (the "Series A Preferred
     Stock") is hereby established.  The number of shares of Series A Preferred
     Stock hereby authorized shall be two million (2,000,000).

(2)  Definitions.  For purposes of the Series A Preferred Stock, the following
     -----------                                                              
     terms shall have the meanings indicated:

     "Cash Business Combination" means a Transaction in which the fair market
     value of the aggregate consideration into which the outstanding shares of
     Common Stock are or will be exchanged or converted, or which holders of
     such shares will be entitled to receive, consists of 40% or less voting
     common equity.  In determining whether a Transaction is a Cash Business
     Combination, the following will apply: (a) if elections for the type of
     consideration may be made by the holders of Common Stock, it will be
     assumed that all holders of Common Stock elect or will elect consideration
     other than voting common equity, (b) the determination shall be made in
     good faith by the Board of Directors, based on the fair market values of
     the consideration to be issued in the Transaction as of the date the
     definitive merger or other agreement relating thereto is entered into, and
     (c) if any of the consideration to be issued in the Transaction is a
     publicly traded security, the fair market value of that security shall be
     the Current Market Price of such security as of the date the definitive
     merger or other agreement relating thereto is entered into.

     "Common Stock" shall mean the common stock, par value $.01 per share, of
     the Corporation.

     "Conversion Price" shall mean the conversion price per share of Common
     Stock for which each share of Series A Preferred Stock is convertible, as
     such Conversion Price may be adjusted pursuant to Section 7 hereof.  The
     initial Conversion Price shall be an amount equal to $38.10.

     "Conversion Date" shall have the meaning set forth in paragraph (d) of
     Section 7 hereof.

     "Conversion Period" shall have the meaning set forth in paragraph (a) of
     Section 7 hereof.

     "Conversion Right" shall have the meaning set forth in paragraph (a) of
     Section 7 hereof.

     "Current Market Price" of a share of Common Stock or of a publicly traded
     security of any other issuer for any day shall mean the last reported sales
     price, regular way, on 

                                       2

 
     such day, or, if no sale takes place on such day, the average of the
     reported closing bid and asked prices on such day, regular way, in either
     case as reported on the New York Stock Exchange ("NYSE") or, if such
     security is not listed or admitted for trading on the NYSE, on the
     principal national securities exchange on which such security is listed or
     admitted for trading or, if not listed or admitted for trading on any
     national securities exchange, on the Nasdaq National Market or, if such
     security is not quoted on such Nasdaq National Market, the average of the
     closing bid and asked prices on such day in the over-the-counter market as
     reported by Nasdaq or, if bid and asked prices for such security on such
     day shall not have been reported through Nasdaq, the average of the bid and
     asked prices on such day as furnished by any NYSE member firm regularly
     making a market in such security selected for such purpose by the Chief
     Executive Officer of the Corporation.

     "Dividend Payment Date" shall mean the fifteenth day of February, May,
     August and November, in each year, commencing on ___________, 199_;
     provided, however, that if any Dividend Payment Date falls on any day other
     than a Business Day, the dividend payment due on such Dividend Payment Date
     shall be paid on the first Business Day immediately following such Dividend
     Payment Date.

     "Dividend Periods" shall mean quarterly dividend periods from and after a
     Dividend Payment Date and to and excluding the next succeeding Dividend
     Payment Date (other than the initial Dividend Period, which shall commence
     on the day after the Issue Date and end on and exclude __________, 199_)

     "Fair Market Value" shall mean the average of the daily Current Market
     Prices per share of Common Stock during the ten (10) consecutive Trading
     Days selected by the Corporation commencing not more than 20 Trading Days
     before, and ending not later than, the earlier of the day in question and
     the day before the "ex" date with respect to the issuance or distribution
     requiring such computation. The term "`ex' date," when used with respect to
     any issuance or distribution, means the first day on which shares of Common
     Stock trade regular way, without the right to receive such issuance or
     distribution, on the exchange or in the market, as the case may be, used to
     determine that day's Current Market Price.

     "Forced Conversion" has the meaning set forth in Section 7(b) hereof.

     "Forced Conversion Amount" shall mean the number of shares of Series A
     Preferred Stock which the Corporation may require to be converted as
     provided in paragraph 7(b).

     "Forced Conversion Option" shall have the meaning set forth in paragraph
     (b) of Section 7 hereof.

     "Issue Date" shall mean ____________, 199_ [the date the shares are
     purchased].

                                       3

 
     "Junior Preferred Stock" shall mean any class or series of capital stock of
     the Corporation the holders of which are entitled to the receipt of
     dividends or of amounts distributable upon liquidation, dissolution or
     winding up, as the case may be, junior in priority to the holders of the
     Series A Preferred Stock, but senior in priority to the holders of Common
     Stock.

     "Junior Stock" shall mean the Common Stock and any other class or series of
     capital stock of the Corporation constituting junior stock within the
     meaning set forth in paragraph (a) of Section 9 hereof.

     "Liquidation Preference" shall have the meaning set forth in paragraph (a)
     of Section 4 hereof.

     "Option Strike Date" shall have the meaning set forth in paragraph (a) of
     Section 5 hereof.

     "Parity Stock" shall have the meaning set forth in paragraph (b) of Section
     9 hereof.

     "Partnership" shall mean Boston Properties Limited Partnership, a Delaware
     limited partnership, or any successor entity.

     "Preferred Rate" shall mean, at any given time, the rate per annum as to
     which dividends accrue on each share of Series A Preferred Stock, based on
     the Liquidation Preference, for purposes of determining the Stated
     Quarterly Dividend in effect at such time, as set forth in the following
     schedule:

     Time Period                              Preferred Rate
     -----------                              --------------

     [Issue Date] to March 31, 1999           5.0%
     April 1, 1999 to December 31, 1999       5.5%
     January 1, 2000 to December 31, 2000     5.625%
     January 1, 2001 to December 31, 2001     6.0%
     January 1, 2002 to December 31, 2002     6.5%
     January 1, 2003 to _______, 2009 
          [up to the midpoint of year 11]     7.0%
     ________, 2009 and thereafter            6.0%

     "Ratchet Dividend" shall mean for each Dividend Payment Date a dividend
     payable, if applicable, per share of Series A Preferred Stock in respect of
     the Dividend Period ending on such Dividend Payment Date.  The Ratchet
     Dividend for each Dividend Period shall be equal to the dividend which
     would have been paid in respect of such share of Series A Preferred Stock
     had (i) such share of Series A Preferred Stock been converted into (x) a
     number of shares of Common Stock determined by dividing the Liquidation
     Preference by the Conversion Price in effect on such Dividend Payment Date
     and any (y) Other Securities (as defined below) issuable upon such
     conversion and (ii) there had been paid in respect of each such share of
     Common Stock and Other Securities (including any fractional portion thereof
     to the fourth decimal) a dividend (the "Regular Dividend") equal to the
     regular, quarterly cash dividend paid to holders 

                                       4

 
     of record of Common Stock and Other Securities on that record date (the
     "Reference Record Date") which is closest to the end of the calendar
     quarter preceding such Dividend Payment Date. For purposes of determining
     the Ratchet Dividend, in the event that a special cash dividend or
     distribution was paid to holders of Common Stock and Other Securities on
     the Reference Record Date or at any time prior to the Reference Record Date
     and after the last record date for regular, quarterly cash dividends, then
     in such event the Ratchet Dividend shall include, in addition to the
     Regular Dividend paid in respect of the Reference Record Date, the amount
     of such special cash dividend or distribution paid in respect of each share
     of Common Stock or Other Security (for clarity, it is noted that the effect
     of this sentence is to assure that in calculating the Ratchet Dividend the
     holders of Series A Preferred Stock will benefit from any cash dividends or
     distributions paid in respect of Common Stock and Other Securities even if
     such cash dividends or distributions might not be characterized as
     "regular, quarterly cash dividends"). In the event that a share of Series A
     Preferred Stock is outstanding for only a portion of a Dividend Period,
     then the Ratchet Dividend with respect to such share of Series A Preferred
     Stock and such Dividend Period shall be determined as provided in the
     preceding sentence but shall then be adjusted by multiplying such amount by
     a fraction, the numerator of which equals the number of days such share of
     Series A Preferred Stock had been outstanding during such period and the
     denominator of which shall equal the total number of days during such
     Dividend Period. As used herein, the term "Other Security" means any
     security in addition to Common Stock (including Junior Preferred Stock)
     which may be issuable to a holder of Series A Preferred Stock upon
     conversion of a share of Series A Preferred Stock.

     "Redemption Notice" shall have the meaning set forth in paragraph (b) of
     Section 5 hereof.

     "Redemption Right" shall have the meaning set forth in paragraph (a) of
     Section 5 hereof.

     "Securities" shall have the meaning set forth in paragraph (g)(iii) of
     Section 7 hereof.

     "Series A Preferred Nominee" shall have the meaning set forth in Section
     3(j).

     "Series A Preferred Stock" shall have the meaning set forth in Section 1
     hereof.

     "Source Agreements" shall mean that certain Master Transaction Agreement
     dated September __, 1998 by and among the Corporation, the Partnership and
     certain other parties listed therein, and each of the other agreements
     contemplated therein.

     "Stated Quarterly Dividend" shall mean for each Dividend Payment Date a
     dividend payable, if applicable, per share of Series A Preferred Stock in
     respect of the Dividend Period ending on such Dividend Payment Date.  The
     Stated Quarterly Dividend for 

                                       5

 
     each Dividend Period shall equal the sum of the following products for each
     day in such Dividend Period on which the share of Series A Preferred Stock
     is outstanding: (i) the Preferred Rate in effect on such day divided by
     365, multiplied by (ii) the Liquidation Preference.

     "Target Amount" shall mean that number of shares of Series A Preferred
     Stock having a Liquidation Preference equal to one-sixth of the aggregate
     Liquidation Preference of the Series A Preferred Stock created hereby and
     issued on the Issue Date.

     "Trading Day" shall mean any day on which the securities in question are
     traded on the New York Stock Exchange ("NYSE"), or if such securities are
     not listed or admitted for trading on the NYSE, on the principal national
     securities exchange on which such securities are listed or admitted, or if
     not listed or admitted for trading on any national securities exchange, on
     the Nasdaq National Market, or if such securities are not quoted on such
     Nasdaq National Market, in the applicable securities market in which the
     securities are traded.

     "Transaction" shall have the meaning set forth in paragraph (h) of Section
     7 hereof.

(3)  Dividends.
     --------- 

     (a)  The holders of Series A Preferred Stock shall be entitled to receive,
          in respect of each Dividend Payment Date, when, as and if authorized
          and declared by the Board of Directors out of assets legally available
          for that purpose, cumulative preferential dividends payable in cash in
          an amount per share of Series A Preferred Stock equal to the greater
          of (i) the Stated Quarterly Dividend for such Dividend Payment Date or
          (ii) the Ratchet Dividend for such Dividend Payment Date.  Such
          dividends shall, with respect to each share of Series A Preferred
          Stock, be cumulative from and including the Issue Date, whether or not
          in, or with respect to, any Dividend Period or Periods (i) such
          dividends are declared, (ii) the Corporation is contractually
          prohibited from paying such dividends or (iii) there shall be assets
          of the Corporation legally available for the payment of such
          dividends, and shall be payable quarterly, when, as and if authorized
          and declared by the Board of Directors, in arrears on Dividend Payment
          Dates, commencing on the first Dividend Payment Date after the Issue
          Date. Dividends are cumulative from the most recent Dividend Payment
          Date to which dividends have been paid, whether or not in, or with
          respect to, any Dividend Period or Periods (i) such dividends are
          declared, (ii) the Corporation is contractually prohibited from paying
          such dividends or (iii) there shall be assets legally available
          therefor.  Each such dividend shall be payable in arrears to the
          holders of record of the Series A Preferred Stock, as they appear on
          the stock records of the Corporation at the close of business on such
          record dates, not more than 30 days preceding the applicable Dividend
          Payment Date (the "Dividend Payment Record Date") (or, in the case of
          a Dividend Payment 

                                       6

 
          Record Date that coincides with a record date for payment of dividends
          on Common Stock, not more than 60 days preceding the applicable
          Dividend Payment Date), as shall be fixed by the Board of Directors;
          provided, however, that with respect to the first Dividend Period, the
          Dividend Payment Record Date for such period will be on or after the
          Issue Date. Accrued and unpaid dividends for any past Dividend Periods
          and any additional amounts as provided in subsection (f) may be
          authorized and declared and paid at any time, without reference to any
          regular Dividend Payment Date, to holders of record on such date, not
          exceeding 45 days preceding the payment date thereof (or, in the case
          of a record date that coincides with a record date for payment of
          dividends on Common Stock, not more than 60 days preceding the
          applicable payment date thereof), as may be fixed by the Board of
          Directors.

     (b)  The first Dividend Period with respect to the Series A Preferred Stock
          shall be for the period from on and after the Issue Date to the first
          Dividend Payment Date of (and excluding) ____________, 199_.

     (c)  So long as any shares of Series A Preferred Stock are outstanding, no
          dividends (whether in cash or in kind or upon liquidation of the
          Corporation), except as described in the immediately following
          sentence, shall be authorized and declared or paid on any series or
          class or classes of Parity Stock for any period nor shall any shares
          of Parity Stock be redeemed, purchased or otherwise acquired for any
          consideration or any moneys to be paid to or made available for a
          sinking fund for the redemption of any shares of Parity Stock,
          directly or indirectly (except by conversion into or exchange for
          shares of Parity Stock or Junior Stock), unless full cumulative
          dividends, including, if applicable, the further preferential dividend
          provided in subsection (f), have been or contemporaneously are
          authorized and declared and paid on the Series A Preferred Stock for
          all Dividend Periods terminating on or prior to the dividend payment
          date on (or date of purchase, redemption or other acquisition of) such
          class or series of Parity Stock.  When dividends are not paid in full
          upon the Series A Preferred Stock and any other class or classes of
          Parity Stock, all dividends authorized upon the Series A Preferred
          Stock and any other class or classes of Parity Stock shall be
          authorized and declared ratably in proportion to the respective
          amounts of dividends accumulated and unpaid on the Series A Preferred
          Stock and such Parity Stock (which shall not include any accrual in
          respect of unpaid dividends for prior dividend periods if such Parity
          Stock does not have a cumulative dividend).

     (d)  So long as any shares of Series A Preferred Stock are outstanding, no
          dividends (other than dividends or distributions paid solely in shares
          of Junior Stock, or options, warrants or rights to subscribe for or
          purchase shares of Junior Stock) shall be authorized and declared or
          paid or other distribution authorized and declared or made upon shares
          of Junior Stock for any period, nor shall any 

                                       7

 
          shares of Junior Stock be redeemed, purchased or otherwise acquired
          (other than a redemption, purchase or other acquisition of Common
          Stock made for purposes of and in compliance with requirements of
          employee incentive or employee benefit plans of the Corporation or any
          of its subsidiaries), for any consideration (or any moneys to be paid
          to or made available for a sinking fund for the redemption of any
          shares of Junior Stock) by the Corporation, directly or indirectly
          (except by conversion into or exchange for Junior Stock), unless in
          each case (i) the full cumulative dividends on all outstanding shares
          of Series A Preferred Stock, including, if applicable, the further
          preferential dividend provided in subsection (f), and any other Parity
          Stock of the Corporation shall have been paid for all past Dividend
          Periods with respect to the Series A Preferred Stock and all past
          dividend periods with respect to such Parity Stock and (ii) sufficient
          funds shall have been paid for or irrevocably set aside and designated
          for payment of the dividend due for the current Dividend Period with
          respect to the Series A Preferred Stock.

     (e)  Without limiting the other provisions hereof, no dividends on shares
          of Series A Preferred Stock (other than liquidating distributions made
          in accordance with Section 4 hereof) shall be paid by the Corporation
          at such time as the terms and provisions of any agreement of the
          Corporation or its affiliates or subsidiaries, relating to bona fide
          indebtedness for borrowed money, prohibits such declaration or payment
          or provides that such declaration or payment would constitute a breach
          thereof or a default thereunder, or if such declaration or payment
          shall be restricted or prohibited by law (and such failure to pay
          dividends on the Series A Preferred Stock shall prohibit other
          dividends and distributions by the Corporation as described in
          Sections 3(c) and (d)).

     (f)  Notwithstanding the foregoing, dividends on the Series A Preferred
          Stock shall accrue whether or not the terms and provisions set forth
          in Section 3(e) hereof at any time prohibit the current payment of
          dividends, whether or not the Corporation has earnings, whether or not
          there are funds legally available for the payment of such dividends
          and whether or not such dividends are declared. Accrued but unpaid
          dividends on the Series A Preferred Stock will accumulate as of the
          Dividend Payment Date on which they first become payable and a further
          preferential dividend at the per annum rate then applicable for the
          period or periods specified in subsection (a) above shall accrue
          during the period of accumulation and be paid in respect of such
          unpaid dividends until the amount thereof and the further preferential
          amount thereon shall have been paid in full.

     (g)  Upon liquidation, dissolution or winding up of the Corporation, no
          dividends shall be paid to any series or class or classes of Junior
          Stock until after payment shall have been made in full to the holders
          of the Series A Preferred Stock, as provided in Section 4(a).

                                       8

 
     (h)  Any dividend made on the Series A Preferred Stock shall first be
          credited against the further preferential dividend provided in
          subsection (f) above and then against the earliest accrued but unpaid
          dividend due with respect to such Series A Preferred Stock which
          remains payable.  The only dividends to which the Series A Preferred
          Stock shall be entitled are those described in this Section 3.

     (j)  The holders of Series A Preferred Stock will be eligible to nominate,
          and to have appointed, one director to the Company's Board of
          Directors, subject to the following conditions, qualifications and
          procedures:

               (I)  The provisions of this subparagraph (j) shall only apply for
               so long as The Prudential Insurance Company of America
               ("Prudential"), directly or indirectly through affiliates,
               beneficially owns 2,000,000 shares of Series A Preferred Stock
               (subject to adjustment in the event of a stock split or reverse
               stock split in the Series A Preferred Stock).  As used in the
               preceding sentence, "beneficially owns" has the meaning ascribed
               thereto in Rule 13d-3, as in effect on the date hereof, under the
               Securities Exchange Act of 1934, except that it shall not include
               "shared" voting or investment power (i.e., Prudential will be
               deemed to beneficially own the Series A Preferred Stock only if
               it and its affiliates have sole voting or investment power with
               respect thereto).  The provisions of this subparagraph (j) shall
               not benefit any subsequent transferee of the Series A Preferred
               Stock except for affiliates of Prudential (i.e., transferees that
               are controlled by, control or are under common control with
               Prudential), and in any event only if Prudential or such
               affiliate is deemed to beneficially own the shares of Series A
               Preferred Stock acquired by such affiliate.  As a condition to
               implementation of the rights of the holders of Series A Preferred
               Stock set forth in this subparagraph (j), the Corporation may
               require certification by Prudential that the condition set forth
               in this clause (I) is met.

               (II) If and for so long as an aggregate of six quarterly
               dividends payable on the Series A Preferred Stock are in arrears
               (which shall, with respect to any such quarterly dividend, mean
               that any such dividend has not been paid in full), whether or not
               (i) such dividends are declared, (ii) the Corporation is
               contractually prohibited from paying such dividends or (iii)
               there shall be assets of the Corporation legally available for
               the payment of such dividends, the number of directors then
               constituting the Board of Directors shall be increased by one and
               the Board of Directors shall appoint a Series A Preferred Nominee
               to fill the vacancy thus created.  A "Series A Preferred Nominee"
               means a person that the holders of a majority of the Series A
               Preferred Stock, by written consent of such 

                                       9

 
               holders or by vote at a special meeting of the holders of Series
               A Preferred Stock, have formally nominated to be appointed to the
               Board of Directors to fill such vacancy, provided that the Board
               of Directors shall only be obligated to appoint a Series A
               Preferred Nominee to fill such vacancy if:

                    (A)  The holders of Series A Preferred Stock nominate three
                    Series A Preferred Nominees, from which the Board of
                    Directors may select one such person to fill such vacancy,
                    and

                    (B)  Each Series A Preferred Nominee (other than any Series
                    A Preferred Nominee that is an employee of Prudential or an
                    affiliate of Prudential) is reasonably acceptable to the
                    Board of Directors, and

                    (C)  Each such Series A Preferred Nominee submits to the
                    Board of Directors a duly-executed, binding and enforceable
                    letter of resignation from the Board, to be effective
                    immediately upon the date on which all arrears in dividends
                    on the Series A Preferred Stock shall have been paid and
                    dividends thereon for the current quarterly dividend period
                    shall have been paid or declared and set apart for payment.

               (III) Whenever all arrears in dividends on the Series A Preferred
               Stock shall have been paid and full dividends thereon for the
               current quarterly dividend period shall have been paid or
               declared and set apart for payment, then the right of the holders
               of the Series A Preferred Stock to have a Series A Preferred
               Nominee appointed to, and remain on, the Board of Directors shall
               cease (but subject always to the same provision for the vesting
               of  the rights set forth in this subparagraph (j) in the case of
               any similar future arrearages in six quarterly dividends), and
               the term of office of the Series A Preferred Nominee that was
               appointed to the Board of Directors shall forthwith terminate and
               the number directors constituting the Board of Directors shall be
               reduced accordingly.

               (IV) At any time after the rights of the holders of Series A
               Preferred Stock set forth in this subparagraph (j) shall be in
               effect, the Secretary of the Corporation shall upon the written
               request of any holder of Series A Preferred Stock (addressed to
               the Secretary at the principal office of the Corporation), call a
               special meeting of the holders of the Series A Preferred Stock
               for the election of three Series A Preferred Nominees.

               (V)  The Series A Preferred Nominee that is appointed to the
               Board of Directors shall hold office until the next annual
               meeting of the stockholders if such office shall not have
               previously terminated as above 

                                       10

 
               provided. At such annual meeting, the holders of the Series A
               Preferred Stock may (i) reelect such Series A Preferred Nominee
               by majority consent or vote or (ii) repeat the procedures
               described above to have a successor appointed by the Board of
               Directors. If any vacancy shall occur in the office reserved for
               the Series A Preferred Nominee, a successor shall be appointed by
               the Board of Directors after repeating the procedures described
               above.

(4)  Liquidation Preference.
     ---------------------- 

     (a)  In the event of any liquidation, dissolution or winding up of the
          Corporation, whether voluntary or involuntary, before any payment or
          distribution of the assets of the Corporation (whether capital or
          surplus) shall be made to the holders of Junior Stock, the holders of
          the Series A Preferred Stock shall be entitled to receive Fifty
          Dollars ($50.00) per share of Series A Preferred Stock (the
          "Liquidation Preference") or, if greater, the amount which each holder
          would receive in respect of the Common Stock and Other Securities and
          property it would receive upon conversion of its shares of Series A
          Preferred Stock if all shares of Series A Preferred Stock were
          converted pursuant to Section 7 immediately prior to the distribution
          of liquidation proceeds, plus an amount equal to all dividends
          (whether or not earned or declared) accrued and unpaid thereon
          pursuant to Section 3 to the date of final distribution to such
          holder; but such holders of Series A Preferred Stock shall not be
          entitled to any further payment.  If, upon any such liquidation,
          dissolution or winding up of the Corporation, the assets of the
          Corporation, or proceeds thereof, distributable among the holders of
          Series A Preferred Stock shall be insufficient to pay in full the
          preferential amount aforesaid and liquidating payments on any other
          Parity Stock, then such assets, or the proceeds thereof, shall be
          distributed among the holders of such Series A Preferred Stock and any
          such other Parity Stock ratably in accordance with the respective
          amounts that would be payable on such Series A Preferred Stock and any
          such other Parity Stock if all amounts payable thereon were paid in
          full.

     (b)  Upon any liquidation, dissolution or winding up of the Corporation,
          after payment shall have been made in full to the holders of the
          Series A Preferred Stock and Parity Stock, as provided in this Section
          4, any series or class or classes of Junior Stock shall, subject to
          any respective terms and provisions applying thereto, be entitled to
          receive any and all assets remaining to be paid or distributed.

     (c)  After payment of the full amount of the liquidating distributions to
          which they are entitled pursuant to Sections 4(a) and (b), the holders
          of Series A Preferred Stock will have no right or claim to any of the
          remaining assets of the Corporation.

                                       11

 
     (d)  The consolidation or merger of the Corporation with or into any other
          corporation, partnership, trust or entity or of any other corporation,
          partnership, trust or entity with or into the Corporation, or an
          exchange of capital stock, or the sale, lease or conveyance of all or
          substantially all of the property or business of the Corporation
          (unless the net proceeds of any of the foregoing transactions shall be
          distributed to the holders of capital stock rather than reinvested),
          shall not be deemed to constitute a liquidation, dissolution or
          winding up of the Corporation.

(5)  Redemption.
     ---------- 

     (a)  Subject to adjustment as provided in this Section 5, on each of [each
          of those Business Days which is six months after the tenth, eleventh,
          twelfth, thirteenth, fourteenth and fifteenth anniversary of the
          Closing Date of the transactions contemplated in the Master
          Transaction Agreement] (each an "Option Strike Date") (i) each of the
          holders of Series A Preferred Stock, upon giving prior written notice
          as provided below, shall have the right (the "Redemption Right") to
          require that the Corporation redeem for cash, at a redemption price of
          $50 per share of Series A Preferred Stock, shares of Series A
          Preferred Stock held by such holder; provided that the maximum number
          of shares of Series A Preferred Stock that may be required to be
          redeemed from all such holders is equal to the Target Amount;
          provided, further, that a holder may not exercise the Redemption Right
          for less than one thousand (1,000) shares of Series A Preferred Stock
          or, if such holder holds less than one thousand shares of Series A
          Preferred Stock, all of the shares of Series A Preferred Stock held by
          such holder; and (ii) the Corporation, upon giving prior written
          notice as provided below, shall have the Redemption Right to require
          the redemption for cash, at a redemption price of $50 per share of
          Series A Preferred Stock, of a number of shares of Series A Preferred
          Stock equal to, but not in excess of, the Target Amount (in the
          aggregate from all holders); provided, however, that the Corporation
          may not require the redemption on any Option Strike Date of more than
          the lesser of (A) the Target Amount in respect of such Option Strike
          Date or (B) such number of shares of Series A Preferred Stock as shall
          have an aggregate Liquidation Preference equal to the excess of (i)
          the aggregate Liquidation Preference of the sum of the Target Amounts
          for all prior Option Strike Dates and the currently applicable Option
          Strike Date over (ii) the aggregate Liquidation Preference of all
          shares of Series A Preferred Stock previously converted (including
          Forced Conversions), noticed for conversion on such Option Strike
          Date, previously redeemed, and noticed for redemption on such Option
          Strike Date.

          The exercise of a Redemption Right on any Option Strike Date shall not
          be cumulative (i.e., the Target Amount with respect to any Option
          Strike Date is the maximum number of shares of Series A Preferred
          Stock subject to 

                                       12

 
          mandatory redemption by either the Corporation or the holders of
          Series A Preferred Stock on each Option Strike Date); any shares of
          Series A Preferred Stock that are not converted pursuant to Section 7
          or redeemed pursuant to this Section 5 on or before ______ [the last
          Option Strike Date] shall remain outstanding and shall have all of the
          rights and preferences set forth in this Certificate except that the
          provisions of this Section 5 shall not apply to any shares of Series A
          Preferred Stock outstanding after such date.

     (b)  In order to exercise its Redemption Right, a holder of Series A
          Preferred Stock shall deliver a notice (a "Redemption Notice," such
          term to also include the notice required to be delivered by the
          Corporation upon exercise of its Redemption Right) in the form
          attached hereto as Exhibit B to the Corporation not less than 40 nor
          more than 70 days prior to an Option Strike Date.  If a holder of
          Series A Preferred Stock who has delivered a Redemption Notice
          pursuant to this Section 5 converts the shares tendered for redemption
          prior to the redemption date, the Redemption Notice shall be deemed
          revoked.  The Corporation may exercise its Redemption Right by
          delivering in writing a Redemption Notice, containing the information
          provided in subsection (d), to each holder of record of Series A
          Preferred Stock, not less than 30 nor more than 70 days prior to an
          Option Strike Date.

          If, pursuant to the exercise of a Redemption Right by holders of the
          Series A Preferred Stock, with such redemption to be effective on an
          Option Strike Date, holders tender for redemption a number of shares
          of Series A Preferred Stock having an aggregate Liquidation Preference
          greater than the Target Amount, the Corporation may redeem all such
          shares tendered for redemption or a lesser number of shares, as the
          Corporation determines in its sole discretion, but not less than the
          Target Amount; provided, however, that if the Corporation does not
          redeem all shares of Series A Preferred Stock so tendered for
          redemption, the Corporation shall redeem shares ratably from each
          tendering holder in proportion to the respective number of shares
          tendered.  If the holders have tendered for redemption a number of
          shares of Series A Preferred Stock less than the Target Amount and the
          Corporation delivers a Redemption Notice to redeem a number of shares
          of Series A Preferred Stock greater than the number of shares tendered
          for redemption by the holders, the Corporation shall first redeem the
          shares of Series A Preferred Stock of those holders exercising their
          Redemption Right pursuant to this Section 5 and shall then redeem, on
          a pro rata basis, shares of Series A Preferred Stock from all holders
          who hold shares after giving effect to such redemption; provided,
          however, that in such case, (i) the Corporation shall deliver a
          separate notice at least 30 days prior to the Option Strike Date,
          containing the information provided in subsection (d), to all holders
          of the shares of Series A Preferred Stock to be so redeemed indicating
          the number of shares to be so redeemed, and (ii) the total number of
          shares to be 

                                       13

 
          redeemed (upon notice by the Corporation and the holders,
          collectively) shall not exceed the Target Amount.

          If the Corporation delivers a Redemption Notice to the holders of the
          Series A Preferred Stock, the holders shall have the right, subject to
          Section 7(a), to convert their shares of Series A Preferred Stock into
          Common Stock, pursuant to Section 7, on or before the Option Strike
          Date.  To the extent that such shares of Series A Preferred Stock are
          so converted, the right of the Corporation to require the redemption
          of Series A Preferred Stock shall be reduced by the aggregate
          Liquidation Preference of the shares of Series A Preferred Stock so
          converted (and the reduction in the number of shares of Series A
          Preferred Stock to be redeemed from each holder shall be allocated
          first to the holders who so elected to convert their shares and second
          pro rata among all other holders).

          Within two Business Days of a redemption of Series A Preferred Stock,
          the Corporation shall pay the redemption price by certified check to
          or on the order of those holders whose shares of Series A Preferred
          Stock have been redeemed.

     (c)  Immediately prior to any redemption of Series A Preferred Stock and as
          a condition to such redemption, the Corporation shall pay, in cash,
          all accumulated and unpaid dividends, including the further
          preferential dividend provided in Section 3(f), through the Option
          Strike Date in respect of all shares of Series A Preferred Stock,
          including those shares to be redeemed.  Unless full cumulative
          dividends on all shares of Series A Preferred Stock have been paid,
          the Corporation may not require the shares of Series A Preferred Stock
          to be redeemed.

     (d)  A Redemption Notice shall be provided in the manner provided in
          Section 11. Any defect in a Redemption Notice or in the mailing
          thereof to any particular holder or the Corporation shall not affect
          the sufficiency of the notice or the validity of the proceedings for
          redemption with respect to the other holders. Any notice that was
          mailed in the manner herein provided shall be conclusively presumed to
          have been duly given on the date of deemed delivery provided in
          Section 11, whether or not the holder receives the notice.  Each of
          the Corporation's Redemption Notices shall state, as appropriate: (1)
          the Option Strike Date; (2) the number of shares of Series A Preferred
          Stock to be redeemed in the aggregate from all holders and, if fewer
          than all the shares of Series A Preferred Stock held by such holder
          are to be redeemed, the number of such shares of Series A Preferred
          Stock to be redeemed from such holder; and (3) that dividends on the
          shares of Series A Preferred Stock to be redeemed shall cease to
          accrue on such Option Strike Date except as otherwise provided herein.
          Notice having been delivered as aforesaid, from and after the Option
          Strike Date (unless the Corporation shall fail to pay the redemption
          price on the date 

                                       14

 
          required), (i) except as otherwise provided herein, dividends on the
          shares of Series A Preferred Stock so called for redemption shall
          cease to accrue, (ii) said shares shall no longer be deemed to be
          outstanding, and all rights of the holders thereof as holders of
          Series A Preferred Stock of the Corporation shall cease (except the
          right to receive the redemption price and the amounts required to be
          paid under subsection (c)).

          After the redemption of Series A Preferred Stock as aforesaid, the
          Corporation shall deliver to such holder, upon his written request, a
          certificate of the Corporation certifying the number of shares of
          Common Stock and Series A Preferred Stock held by such person
          immediately after such redemption.  The Corporation shall also advise
          each holder as to the number of shares of Series A Preferred Stock
          redeemed and the number of shares of Series A Preferred Stock which
          remain outstanding.

     (e)  Each holder of Series A Preferred Stock covenants and agrees with the
          Corporation that all shares of Series A Preferred Stock delivered for
          redemption pursuant to this Section 5 shall be delivered to the
          Corporation free and clear of all liens, and, notwithstanding anything
          contained herein to the contrary, the Corporation shall not be under
          any obligation to acquire shares of Series A Preferred Stock which are
          subject to any liens.

(6)  Intentionally Omitted.

(7)  Conversion.  Holders of Series A Preferred Stock shall have the right (the
     ----------                                                                
     "Conversion Right") to convert all or a portion of their shares of Series A
     Preferred Stock into shares of Common Stock (provided, however, that a
     holder may not exercise the Conversion Right for less than one thousand
     (1,000) shares of Series A Preferred Stock or, if such holder holds less
     than one thousand shares of Series A Preferred Stock, all of the shares of
     Series A Preferred Stock held by such holder), and the Corporation shall
     have the right on each Option Strike Date to cause a conversion of shares
     of Series A Preferred Stock into shares of Common Stock, subject, in each
     case, to the following conditions and procedures:

     (a)  Subject to and upon compliance with the provisions of this Section 7,
          a holder of Series A Preferred Stock shall have the right, at his or
          her option, at any time and from time to time during the period on or
          after the earlier of (i) __________ [the last Business Day of the
          calendar year of the fourth anniversary of the Closing Date of the
          transactions contemplated in the Master Transaction Agreement] and
          (ii) the effective time of a Cash Business Combination (the period
          beginning on and after the earlier of such dates, the "Conversion
          Period"), to convert its shares of Series A Preferred Stock into the
          number of fully paid and non-assessable shares of Common Stock
          obtained by dividing the aggregate Liquidation Preference of such
          shares of Series A Preferred Stock by 

                                       15

 
          the Conversion Price as in effect as of such time (i.e. after
          adjustment as described in subsection (g)) by delivering a Conversion
          Notice in the form attached hereto as Exhibit A within the time period
          specified in paragraph (d) below and in the manner provided in Section
          11; provided, however, that the right to deliver a conversion notice
          with respect to shares of Series A Preferred Stock called or tendered
          for redemption pursuant to Section 5 hereof shall terminate on that
          day which is the fifth business day prior to the applicable Option
          Strike Date on which such shares are to be redeemed, unless the
          Corporation shall default in making any cash payment required upon a
          redemption on such date as provided in Section 5 hereof. A conversion
          of shares of Series A Preferred Stock specified in the Conversion
          Notice shall occur automatically at the close of business on the
          applicable Conversion Date without any action on the part of the
          holders of Series A Preferred Stock, and immediately after the close
          of business on the Conversion Date the holders of Series A Preferred
          Stock who had all or a portion of their shares of Series A Preferred
          Stock converted shall be credited on the books and records of the
          Corporation with the issuance as of the opening of business on the
          next day of the shares of Common Stock issuable upon such conversion.

     (b)  If, as of an applicable Option Strike Date, the Target Amount for such
          Option Strike Date has not been redeemed and/or converted (or noticed
          for conversion and/or redemption on such Option Strike Date) as a
          result of holders of Series A Preferred Stock and/or the Corporation
          exercising Redemption Rights pursuant to Section 5 and/or such holders
          exercising their conversion rights pursuant to this Section 7, the
          Corporation, subject to and upon compliance with the provisions of
          this Section 7, may convert (a "Forced Conversion") not more than the
          lesser of (A) the Target Amount in respect of such Option Strike Date
          or (B) such number of shares of Series A Preferred Stock as shall have
          an aggregate Liquidation Preference equal to the excess of (i) the
          aggregate Liquidation Preference of the sum of the Target Amounts for
          all prior Option Strike Dates and the currently applicable Option
          Strike Date over (ii) the aggregate Liquidation Preference of all
          shares of Series A Preferred Stock previously converted, noticed for
          conversion by the holders on such Option Strike Date, previously
          redeemed, and noticed for redemption on such Option Strike Date (the
          "Forced Conversion Amount") of Series A Preferred Stock into a number
          of shares of Common Stock determined in accordance with the Conversion
          Price in effect on such date as determined in accordance with
          subsection (a) by transmitting for delivery a Conversion Notice, in
          the manner prescribed in Section 11 within one business day after the
          applicable Option Strike Date, to the holders of the shares of Series
          A Preferred Stock which are to be so converted (the "Forced Conversion
          Option") ratably in proportion to the shares of Series A Preferred
          Stock then outstanding from the holders thereof (after giving effect
          to the redemptions and conversions otherwise noticed to occur on such
          Option Strike Date); provided, further, however, that such 

                                       16

 
          Forced Conversion Option may only be exercised by the Corporation if
          the value of a share of Common Stock, calculated on its weighted
          average closing price during the 10 Trading Days prior to the second
          Trading Day preceding the exercise of the Forced Conversion Option, is
          equal to or greater than 110% of the Conversion Price.

     (c)  Immediately prior to any conversion of shares of Series A Preferred
          Stock, the Corporation shall pay, in cash, all accumulated and unpaid
          dividends including the further preferential dividends provided in
          Section 3(f) through the Conversion Date on all shares of Series A
          Preferred Stock.  A holder of shares of Series A Preferred Stock shall
          have no right with respect to any shares of Series A Preferred Stock
          so converted to receive any distributions paid after the Conversion
          Date with respect to such shares and his interest in the Corporation
          as to such converted shares shall be terminated; provided, however,
          that in the event the Corporation is legally or contractually
          prohibited from paying, or fails for any other reason to pay, such
          accumulated and unpaid dividends prior to any conversion and such
          holder elects to continue with and permit such conversion after notice
          from the Corporation of such inability or failure, such holder shall
          still be entitled to receive all such accumulated and unpaid
          dividends, if any, that remain unpaid after such conversion, as well
          as a further preferential dividend on such unpaid dividends as
          provided in Section 3(f), which dividends shall be paid by the
          Corporation as soon as it is legally and contractually permitted to do
          so.

     (d)  After the conversion of shares of Series A Preferred Stock as
          aforesaid, the Corporation shall deliver to such holder, upon his
          written request, a certificate of the Corporation certifying the
          number of shares of Common Stock and Series A Preferred Stock held by
          such person immediately after such conversion.

          Each conversion shall be deemed to have been effected immediately
          prior to the close of business on the date (the "Conversion Date")
          specified in the Conversion Notice (which shall not be earlier than 5
          days after mailing of the Conversion Notice nor later than sixty (60)
          days after such date) or upon the Option Strike Date in the case of a
          Forced Conversion pursuant to Section 7(b) and the shares of Series A
          Preferred Stock so presented for conversion shall be deemed converted
          into shares of Common Stock at the close of business on such date, and
          such conversion shall be in accordance with the Conversion Price in
          effect on such date (unless such day is not a Business Day, in which
          event such conversion shall be deemed to have become effective at the
          close of business on the next succeeding Business Day) as determined
          in accordance with subsection (a).

     (e)  No fractions of shares of Common Stock shall be issued upon conversion
          of shares of Series A Preferred Stock.  Instead of any fractional
          interest in a share 

                                       17

 
          of Common Stock that would otherwise be deliverable upon the
          conversion of a share of Series A Preferred Stock, the Corporation
          shall pay to the holder of such share of Series A Preferred Stock an
          amount in cash based upon the Current Market Price of the Common Stock
          on the Trading Day immediately preceding the date of conversion. If
          more than one share of Series A Preferred Stock shall be surrendered
          for conversion at one time by the same holder, the number of full
          shares of Common Stock issuable upon conversion thereof shall be
          computed on the basis of the aggregate number of shares of Series A
          Preferred Stock so surrendered.

     (f)  Intentionally Omitted.

     (g)  The Conversion Price shall be adjusted from time to time as follows:

          (i)  If the Corporation shall after the Issue Date (A) pay a dividend
               or make a distribution to holders of its Common Stock in shares
               of Common Stock, (B) subdivide its outstanding Common Stock into
               a greater number of shares of Common Stock, (C) combine its
               outstanding Common Stock into a smaller number of shares of
               Common Stock or (D) issue any shares of Common Stock by
               reclassification of its Common Stock, the Conversion Price in
               effect at the opening of business on the day following the date
               fixed for the determination of holders of Common Stock entitled
               to receive such dividend or distribution or at the opening of
               business on the day following the day on which such subdivision,
               combination or reclassification becomes effective, as the case
               may be, shall be adjusted so that the holder of any share of
               Series A Preferred Stock thereafter surrendered for conversion
               shall be entitled to receive the number of shares of Common Stock
               that such holder would have owned or have been entitled to
               receive after the happening of any of the events described above
               had such share of Series A Preferred Stock been converted
               immediately prior to the record date in the case of a dividend or
               distribution or the effective date in the case of a subdivision,
               combination, or reclassification. An adjustment made pursuant to
               this subsection (g)(i) shall become effective immediately after
               the opening of business on the day next following the record date
               in the case of a dividend or distribution and shall become
               effective immediately after the opening of business on the day
               next following the effective date in the case of a subdivision,
               combination, or reclassification and automatically without any
               further required action of the Corporation or the holders of
               Series A Preferred Stock.

          (ii) If the Corporation shall issue after the Issue Date rights,
               options or warrants to all holders of Common Stock entitling them
               to subscribe for or purchase Common Stock (or securities
               convertible into or 

                                       18

 
               exchangeable for Common Stock) at a price per share of Common
               Stock less than the Fair Market Value per share of Common Stock
               on the record date for the determination of holders of Common
               Stock entitled to receive such rights, options or warrants, then
               the Conversion Price in effect at the opening of business on the
               day next following such record date shall be adjusted to equal
               the price determined by multiplying (I) the Conversion Price in
               effect immediately prior to the opening of business on the day
               following the record date fixed for such determination by (II) a
               fraction, the numerator of which shall be the sum of (A) the
               number of shares of Common Stock outstanding on the close of
               business on the record date fixed for such determination and (B)
               the number of shares of Common Stock that the aggregate proceeds
               to the Corporation from the exercise of such rights, options or
               warrants for Common Stock would purchase at such Fair Market
               Value, and the denominator of which shall be the sum of (A) the
               number of shares of Common Stock outstanding on the close of
               business on the date fixed for such determination and (B) the
               number of additional shares of Common Stock offered for
               subscription or purchase pursuant to such rights, options or
               warrants. Such adjustment shall become effective immediately upon
               the opening of business on the day next following such record
               date (subject to paragraph (l) below). In determining whether any
               rights, options or warrants entitle the holders of Common Stock
               to subscribe for or purchase Common Stock at less than such Fair
               Market Value, there shall be taken into account any consideration
               received by the Corporation upon issuance and upon exercise of
               such rights, options or warrants, the value of such
               consideration, if other than cash, to be determined in good faith
               by the Board of Directors.

         (iii) If the Corporation shall distribute to all holders of its Common
               Stock any shares of capital stock of the Corporation (other than
               Common Stock) or evidence of its indebtedness or assets
               (excluding (x) cash dividends and distributions that were taken
               into account in calculating the dividend payable under Section
               3(a), and (y) cash dividends and cash distributions to the extent
               that after giving effect to such dividends and distributions the
               fair market value of the assets of the Corporation exceed the sum
               of the liabilities of the Corporation, as determined in good
               faith by the Board of Directors) or rights or warrants to
               subscribe for or purchase any of its securities (excluding those
               rights and warrants issued to all holders of Common Stock
               entitling them to subscribe for or purchase Common Stock or
               securities convertible into or exchangeable for Common Stock,
               which rights and warrants and convertible or exchangeable
               securities are referred to in and treated under subparagraph (ii)
               above) (any of the foregoing being hereinafter in this
               subparagraph (iii) called the "Securities"), then in each case
               the Conversion Price shall 

                                       19

 
               be adjusted so that it shall equal the price determined by
               multiplying (I) the Conversion Price in effect immediately prior
               to the close of business on the date fixed for the determination
               of stockholders entitled to receive such distribution by (II) a
               fraction, the numerator of which shall be the Fair Market Value
               per share of Common Stock on the record date mentioned below less
               the then fair market value (as determined by the Board of
               Directors in good faith) of the portion of the capital stock or
               assets or evidences of indebtedness so distributed or of such
               rights or warrants applicable to one share of Common Stock, and
               the denominator of which shall be the Fair Market Value per share
               of Common Stock on the record date mentioned below. Such
               adjustment shall become effective immediately upon the opening of
               business on the day next following the record date for the
               determination of stockholders entitled to receive such
               distribution (subject to paragraph (l) below). For the purposes
               of this subparagraph (iii), the distribution of a Security, which
               is distributed not only to the holders of the Common Stock on the
               date fixed for the determination of stockholders entitled to such
               distribution of such Security, but also is required to be
               distributed with each share of Common Stock delivered to a person
               converting a share of Series A Preferred Stock after such
               determination date, shall not require an adjustment of the
               Conversion Price pursuant to this subparagraph (iii); provided
               that on the date, if any, on which a person converting a share of
               Series A Preferred Stock would no longer be entitled to receive
               such Security with a share of Common Stock (other than as a
               result of the termination of all such Securities), a distribution
               of such Securities shall be deemed to have occurred, and the
               Conversion Price shall be adjusted as provided in this
               subparagraph (iii) (and such day shall be deemed to be "the date
               fixed for the determination of the stockholders entitled to
               receive such distribution" and "the record date" within the
               meaning of the two preceding sentences).

          (iv) Notwithstanding the foregoing, no adjustment shall be made
               pursuant to the preceding clauses (ii) and (iii) that would
               result in any increase in the Conversion Price. No adjustment in
               the Conversion Price shall be required unless such adjustment
               would require a cumulative increase or decrease of at least 1% in
               such price; provided, however, that any adjustments that by
               reason of this subsection (g)(iv) are not required to be made
               shall be carried forward and taken into account in any subsequent
               adjustment until made; and provided, further, that any adjustment
               shall be required and made in accordance with the provisions of
               this Section 7 (other than this subsection (g)(iv)) not later
               than such time as may be required in order to preserve the tax-
               free nature of a distribution to the holders of Common Stock.
               Notwithstanding any other provisions of this Section 7, the
               Corporation shall not be required to 

                                       20

 
               make any adjustment of the Conversion Price for the issuance of
               any shares of Common Stock pursuant to any employee benefit or
               compensation plan or other plan providing for the reinvestment of
               dividends or interest payable on securities of the Corporation
               and the investment of additional optional amounts in shares of
               Common Stock under such plan. All calculations under this Section
               7 shall be made to the nearest cent (with $.005 being rounded
               upward) or to the nearest one-tenth of a share (with .05 of a
               share being rounded upward), as the case may be. Anything in this
               paragraph (g) to the contrary notwithstanding, the Corporation
               shall be entitled, to the extent permitted by law, to make such
               adjustments in the Conversion Price (but without adversely
               affecting the economic value of a share of Series A Preferred
               Stock), in addition to those required by this paragraph (g), as
               it in its discretion shall determine to be advisable in order
               that any Series A Preferred Stock dividends, subdivision of
               shares of Series A Preferred Stock, reclassification or
               combination of shares of Series A Preferred Stock, distribution
               of rights, options or warrants to purchase stock or securities,
               or a distribution of other assets (other than cash dividends)
               hereafter made by the Corporation to the holders of the Series A
               Preferred Stock shall not be taxable.

     (h)  If the Corporation shall be a party to any transaction (including
          without limitation a merger, consolidation, share exchange, self
          tender offer for all or substantially all of the shares of Common
          Stock, sale of all or substantially all of the Corporation's assets or
          recapitalization of the Common Stock and excluding any transaction as
          to which subparagraph (g)(i) of this Section 7 applies) (each of the
          foregoing being referred to herein as a "Transaction"), in each case
          as a result of which shares of Common Stock shall be exchanged for or
          converted into the right, or the holders of such shares shall
          otherwise be entitled, to receive securities or other property
          (including cash or any combination thereof), each share of Series A
          Preferred Stock shall upon the commencement of the Conversion Period
          be convertible into the kind and amount of shares of stock or
          securities and other property (including cash or any combination
          thereof) (the "Series A Preferred Stock Merger Consideration")
          receivable upon the consummation of such Transaction by a holder of
          that number of shares of Common Stock into which one share of Series A
          Preferred Stock was convertible immediately prior to such Transaction
          (unless, in connection with such Transaction, the shares of Series A
          Preferred Stock had been converted into the right to receive such
          consideration (and thus, are no longer outstanding)), assuming such
          holder of Common Stock is not a Person with which the Corporation
          consolidated or into which the Corporation merged or which merged into
          the Corporation or to which such sale or transfer was made, as the
          case may be (a "Constituent Person"), or an affiliate of a Constituent
          Person. In the event that holders of Common Stock have the opportunity
          to 

                                       21

 
          elect the form or type of consideration to be received upon
          consummation of the Transaction, prior to such transaction the
          Corporation shall give prompt written notice to the holders of Series
          A Preferred Stock of such election, and the holders of Series A
          Preferred Stock shall also have the right to elect, by written notice
          to the Corporation, the form or type of consideration to be received
          upon conversion of shares of Series A Preferred Stock following
          consummation of such Transaction, and after such election the
          consideration thereby elected by holders of a majority of the shares
          of Series A Preferred Stock shall be the "Series A Preferred Stock
          Merger Consideration" for each share of Series A Preferred Stock. If
          holders of a majority of shares of Series A Preferred Stock fail to
          make such an election, the "Series A Preferred Stock Merger
          Consideration" for each share of Series A Preferred Stock shall be the
          consideration that a holder of that number of shares of Common Stock
          into which one share of Series A Preferred Stock was convertible
          immediately prior to such Transaction would receive if such holder of
          Common Stock failed to make such an election.

               The Corporation shall not be a party to any Transaction unless
          the terms of such Transaction are consistent with the provisions of
          this paragraph (h), and it shall not consent or agree to the
          occurrence of any Transaction until the Corporation has entered into
          an agreement with the successor or purchasing entity, as the case may
          be, for the benefit of the holders of the Series A Preferred Stock
          that will contain provisions enabling the holders of the Series A
          Preferred Stock that remains outstanding after such Transaction to
          convert their shares of Series A Preferred Stock into the
          consideration provided for herein and that shall preserve the
          distribution preference, conversion, redemption, and other rights set
          forth in this Certificate.



     (i)  If:

          (i)  the Corporation shall declare a dividend (or any other
               distribution) on the Common Stock (excluding cash dividends and
               cash distributions to the extent that after giving effect to such
               dividends and distributions the fair market value of the assets
               of the Corporation exceed the sum of the liabilities of the
               Corporation, as determined in good faith by the Board of
               Directors); or

          (ii) the Corporation shall authorize the granting to the holders of
               the Common Stock of rights or warrants to subscribe for or
               purchase any shares of any class or series of capital stock of
               the Corporation or any other rights or warrants; or

                                       22

 
         (iii) there shall be any reclassification of the Common Stock (other
               than an event to which subparagraph (g)(i) of this Section 7
               applies) or any consolidation or merger to which the Corporation
               is a party and for which approval of any stockholders of the
               Corporation is required, or a share exchange involving the
               conversion or exchange of Common Stock into securities or other
               property, or a self tender offer by the Corporation for all or
               substantially all of its outstanding Common Stock, or the sale or
               transfer of all or substantially all of the assets of the
               Corporation as an entirety and for which approval of any
               stockholders of the Corporation is required; or

         (iv)  if there shall occur the voluntary or involuntary liquidation,
               dissolution or winding up of the Corporation;

         then the Corporation shall cause to be mailed to the holders of the
         Series A Preferred Stock at their addresses as shown on the stock
         records of the Corporation, as promptly as possible, but at least 15
         days prior to the applicable date hereinafter specified, a notice
         stating (A) the date on which a record is to be taken for the purpose
         of such dividend, distribution or granting of rights or warrants, or,
         if a record is not to be taken, the date as of which the holders of
         Common Stock of record to be entitled to such dividend, distribution or
         granting of rights or warrants are to be determined or (B) the date on
         which such reclassification, consolidation, merger, share exchange,
         sale, transfer, liquidation, dissolution or winding up is expected to
         become effective, and the date as of which it is expected that holders
         of Common Stock of record shall be entitled to exchange their shares of
         Common Stock for securities or other property, if any, deliverable upon
         such reclassification, consolidation, merger, share exchange, sale,
         transfer, liquidation, dissolution or winding up. Failure to give or
         receive such notice or any defect therein shall not affect the legality
         or validity of the proceedings described in this Section 7.

     (j) In the event that a Cash Business Combination is to be consummated or
         proposed to the holders of Common Stock, the notice referred to in
         subparagraph (i)(iii) above shall specify such fact and such notice
         shall be mailed to the holders of the Series A Preferred Stock
         simultaneously with the mailing of notice to holders of Common Stock of
         the holding of a meeting or written consent or making of elections with
         respect to the Cash Business Combination. In such event, the holders of
         Series A Preferred Stock shall be permitted to tender their shares for
         conversion, in accordance with Section 7 hereof, and may condition such
         tender upon the consummation of such Cash Business Combination. Any
         such conversion of Series A Preferred Stock shall happen simultaneously
         with the consummation of the Cash Business Combination such that
         holders of Series A Preferred Stock receive, at the 

                                       23

 
          consummation of the Cash Business Combination, the consideration
          described in Section 7(h).

     (k)  Whenever the Conversion Price is adjusted as herein provided, the
          Corporation shall promptly file in the books and records of the
          Corporation and provide to each holder an officer's certificate
          setting forth the Conversion Price after such adjustment as required
          by the terms hereof and setting forth a brief statement of the facts
          requiring such adjustment, which certificate shall be conclusive
          evidence of the correctness of such adjustment absent manifest error.
          Promptly after filing of such certificate, the Corporation shall
          prepare a notice of such adjustment of the Conversion Price setting
          forth the adjusted Conversion Price and the effective date such
          adjustment becomes effective and shall mail such notice of such
          adjustment of the Conversion Price to the holders of each share of
          Series A Preferred Stock at such holder's last address as shown on the
          stock records of the Corporation.

     (l)  In any case in which paragraph (g) of this Section 7 provides that an
          adjustment shall become effective on the day next following the record
          date for an event, the Corporation may defer until the occurrence of
          such event (A) issuing to the holder of any share of Series A
          Preferred Stock converted after such record date and before the
          occurrence of such event the additional Common Stock issuable upon
          such conversion by reason of the adjustment required by such event
          over and above the Common Stock issuable upon such conversion before
          giving effect to such adjustment and (B) paying to such holder any
          amount of cash in lieu of any fractional share of Common Stock.

     (m)  There shall be no adjustment of the Conversion Price in case of the
          issuance of any capital stock of the Corporation in a reorganization,
          acquisition or other similar transaction except as specifically set
          forth in this Section 7. If any action would require adjustment of the
          Conversion Price pursuant to more than one paragraph of this Section
          7, only one adjustment shall be made, and such adjustment shall be the
          amount of adjustment that has the highest absolute value; provided,
          however, that multiple actions taken at or about the same time shall
          be subject to separate adjustments.

     (n)  If the Corporation shall take any action affecting the Common Stock,
          other than action described in this Section 7, that in the opinion of
          the Board of Directors would materially adversely affect the
          conversion rights of the holders of the Series A Preferred Stock, the
          Conversion Price for the Series A Preferred Stock may be adjusted, to
          the extent permitted by law, in such manner, if any, and at such time,
          as the Board of Directors, in its sole discretion, may determine to be
          equitable in the circumstances.

                                       24

 
(8)  Voting Rights.
     ------------- 

     (a)  Holders of the Series A Preferred Stock will not have any voting
          rights, except as set forth in Section 3(j) or as set forth below or
          as otherwise from time to time required by law.

     (b)  So long as any shares of Series A Preferred Stock remain outstanding,
          the Corporation shall not, without the affirmative vote of the holders
          of at least a majority of the shares of Series A Preferred Stock
          outstanding at the time, given in person or by proxy, either in
          writing or at a meeting (voting separately as a class), amend, alter
          or repeal the provisions of this Certificate, the Amended and Restated
          Certificate of Incorporation or the amended and Restated Bylaws of the
          Corporation, increase the number of authorized shares of Series A
          Preferred Stock or create any additional class or series of Preferred
          Stock, whether by merger, consolidation or otherwise, so as to
          materially and adversely affect any right, preference, privilege or
          voting power of the Series A Preferred Stock or the holders thereof in
          their capacity as holders of Series A Preferred Stock; but subject, in
          any event, to the following provisions:

          (i)   With respect to the occurrence of any merger, consolidation or
                other business combination or reorganization, so long as shares
                of the Series A Preferred Stock remain outstanding with the
                terms thereof materially unchanged or, if the Corporation is not
                the surviving entity in such transaction, are exchanged for a
                security of the surviving entity with terms that are materially
                the same with respect to rights to dividends, liquidation or
                other distributions, voting, redemption and conversion as the
                Series A Preferred Stock (and with the terms of the Common Stock
                or such other securities for which the Series A Preferred Stock
                (or the substitute security therefor) is convertible materially
                the same with respect to rights to dividends, liquidation or
                other distributions, voting, redemption and conversion), the
                occurrence of any such event shall not be deemed to materially
                and adversely affect such rights, preferences, privileges or
                voting powers of the holders of the Series A Preferred Stock.

          (ii)  Any creation or issuance of any class or series of capital stock
                of the Corporation ranking junior to the Series A Preferred
                Stock with respect to payment of dividends, redemption rights
                and the distribution of assets upon liquidation, dissolution or
                winding up, shall not be deemed to materially and adversely
                affect such rights, preferences, privileges or voting powers of
                the holders of the Series A Preferred Stock.

          (iii) Any creation or issuance of any class or series of Preferred
                Stock (other than an issuance of additional shares of Series A
                Preferred Stock, as to which a class vote shall be required), or
                any increase in the amount of authorized shares of such series,
                in each case ranking on a parity with 

                                       25

 
               the Series A Preferred Stock with respect to payment of
               dividends, voting, redemption and the distribution of assets upon
               liquidation, dissolution or winding up, shall not be deemed to
               materially and adversely affect such rights, preferences,
               privileges or voting powers of the holders of the Series A
               Preferred Stock if such issuance is done (x) in connection with
               an issuance of Preferred Stock in exchange for non-cash assets
               (including, without limitation, (i) securities, partnership
               interests, membership interests or other interests in an entity
               and (ii) real estate, personal property and intangibles), or (y)
               in connection with a bona fide capital raising transaction.

          (iv) Any creation or issuance of any class or series of Preferred
               Stock ranking senior to the Series A Preferred Stock with respect
               to the payment of dividends, redemption rights and the
               distribution of assets upon liquidation, dissolution or winding
               up, to the extent the issuance of such Preferred Stock was in
               compliance with the standard set forth in Section 9(c) hereof,
               shall not be deemed to materially and adversely affect such
               rights, preferences, privileges or voting powers of the holders
               of the Series A Preferred Stock.

     (c)  The foregoing voting provisions will not apply if, at or prior to the
          time when the act, with respect to which such vote would otherwise be
          required, will be effected, all outstanding shares of Series A
          Preferred Stock shall have been converted and/or redeemed.

(9)  Ranking.  The Series A Preferred Stock shall be deemed to rank:
     -------                                                        

     (a)  Senior to any class or series of capital stock of the Corporation, if
          such class or series shall be Common Stock or if the holders of Series
          A Preferred Stock shall be entitled to receipt of dividends or of
          amounts distributable upon liquidation, dissolution or winding up, as
          the case may be, in preference or priority to the holders of shares of
          such class or series, including Junior Preferred Stock ("Junior
          Stock");

     (b)  On a parity with any other class or series of capital stock of the
          Corporation, if the holders of such other class or series of capital
          stock and the Series A Preferred Stock shall be entitled to the
          receipt of dividends and of amounts distributable upon liquidation,
          dissolution or winding up in proportion to their respective amounts of
          accrued and unpaid distributions per share or liquidation preferences,
          without preference or priority one over the other ("Parity Stock");
          and

     (c)  Junior only to (I) any indebtedness issued by the Corporation and (II)
          senior preferred stock (A) issued only for cash by the Corporation in
          a public offering, 

                                       26

 
          or (B) issued only for cash or property in an arm's length transaction
          (x) to one or more institutional investors who are (but for the shares
          of preferred stock so issued) not affiliated with the Corporation or
          any Affiliate (as defined in Section 10) thereof and (y) not in
          connection with any other transaction or transactions with any of such
          Affiliates and (z) which would be permitted by Section 10 if such
          shares of preferred stock were Junior Preferred Stock, and (C) in
          either case, the entire cash proceeds (net of any arm's length
          commissions paid to third parties who are not Affiliates) of which are
          contributed by the Corporation to the Partnership and used by the
          Partnership solely for (i) the acquisition of assets to be held in the
          Partnership's business, (ii) capital expenditures or maintenance
          expenses in respect of assets held by the Partnership, (iii) other
          ordinary course expenses of the Partnership, or (iv) repayment of
          indebtedness of the Partnership (including indebtedness convertible
          into preferred units of the Partnership junior to the Series Two
          Preferred Units and the Series Three Preferred Units of the
          Partnership or common units of the Partnership), and (v) none of which
          proceeds are used (AA) to purchase, redeem, retire or otherwise
          acquire directly or indirectly any preferred units of the Partnership
          junior to the Series Two Preferred Units and the Series Three
          Preferred Units of the Partnership or common units of the Partnership,
          or shares of Junior Preferred Stock or Common Stock of the
          Corporation, or options, warrants, rights to purchase or any other
          securities convertible into the foregoing (other than debt repayable
          pursuant to subclause (iv)) or (BB) to make distributions or to pay
          dividends in respect of any securities described in subclause (AA).
          Any references to the term "Affiliate" in this Section 9(c) (including
          by way of the cross-reference and incorporation in clause (z) of the
          preceding sentence) shall have the meaning given thereto in the
          Amended and Restated By-laws of the Corporation as of the date hereof
          (except that the 5% threshold referred to therein shall be deemed for
          these purposes to be a 10% threshold).

(10) Junior Preferred Stock.  The Corporation may, at its option, issue Junior
     ----------------------                                                   
     Preferred Stock in exchange for arm's length consideration, the adequacy of
     such consideration to be determined in good faith by the Board of
     Directors; provided, however, that the Corporation may not, without the
     consent of holders of a majority of the shares of the Series A Preferred
     Stock, (i) issue Junior Preferred Stock to any Affiliate (as such term is
     defined in the Amended and Restated By-Laws of the Corporation as of the
     date hereof) of the Corporation, (ii) distribute Junior Preferred Stock to
     any holder of Common Stock, (iii) issue Junior Preferred Stock ratably to
     holders of Common Stock for cash or any other consideration,  or (iv) issue
     Junior Preferred Stock in exchange for Common Stock.

(11) Notices.  All notices, demand, requests or other communications which may
     -------                                                                    
     be or are required to be given, served or sent hereunder will be in writing
     and delivered by certified U.S. mail, return receipt required, with postage
     prepaid, or by nationally recognized overnight courier service that
     provides tracking and proof of receipt. 

                                       27

 
     Notices shall be deemed delivered upon the earlier of (i) delivery, (ii)
     refusal of delivery by addressee, (iii) two Business Days after deposit in
     the U.S. Mails in the case of certified U.S. mail, or (iv) one Business Day
     after deposit with a nationally recognized overnight courier. Notices to
     holders of Series A Preferred Stock shall be sent to their address of
     record with the Corporation. Any holder of Series A Preferred Stock may
     change its address of record by written notice as given as aforesaid.
     Notices delivered to the Corporation shall be addressed to Boston
     Properties, Inc. Attn.: Chief Financial Officer, 8 Arlington Street,
     Boston, MA 02116 or to such other address as the Corporation may have
     notified holders in the manner provided in this Section 11.

(12) Certificates.  Notwithstanding anything to the contrary contained in the
     ------------                                                            
     foregoing Sections:

     (a)  In the event of a redemption pursuant to Section 5, on or before the
          applicable Option Strike Date, a holder of shares of Series A
          Preferred Stock subject to such redemption shall surrender
          certificates ("Series A Certificates") representing such shares to the
          place or places designated by the Corporation in writing. The date on
          which the Corporation shall be required to pay to such holder the
          redemption price and the amounts required to be paid under Section
          5(c) shall be the later of (i) the date set forth in the last
          paragraph of Section 5(b) and (ii) two Business Days after the date
          such Series A Certificates have been so surrendered. From and after
          the Option Strike Date, such Series A Certificates shall (subject to
          the last sentence of the first paragraph of Section 5(d)) represent
          only the right to receive the redemption price and the amounts
          required to be paid under Section 5(c), without interest thereon.

     (b)  In the event of a conversion pursuant to Section 7, within 5 days of
          the Conversion Date, a holder of shares of Series A Preferred Stock
          subject to such conversion shall surrender Series A Certificates
          representing such shares to the place or places designated by the
          Corporation in writing. As promptly as practicable after the surrender
          of such Series A Certificates, the Corporation shall cause to be
          issued and delivered to such holder a certificate or certificates
          representing the number of full shares of Common Stock issuable upon
          such conversion. From and after the Conversion Date, such Series A
          Certificates shall represent only the right to receive the number of
          full shares of Common Stock issuable upon such conversion and the
          amounts required to be paid under Sections 7(c) and 7(e) (if such
          amounts have not yet been paid) without interest thereon.

     (c)  A holder of Series A Preferred Stock shall be deemed to have
          surrendered the certificate or certificates representing such stock
          only if (i) the holder surrenders such certificate to the
          Corporation's headquarters, attention Chief Financial Officer, or to
          such other place as the Corporation may specify in writing in its
          Redemption Notice or Conversion Notice, and (ii) such surrendered
          certificate is 

                                       28

 
          duly endorsed or assigned to the Corporation or in blank and is
          accompanied by any other duly executed instruments of transfer that
          the Corporation or its transfer agent may reasonably specify.


(13) Status of Reacquired Stock.  All shares of Series A Preferred Stock which
     --------------------------                                               
     shall have been issued and reacquired in any manner by the Corporation
     shall be restored to the status of authorized, but unissued, shares or
     Preferred Stock, without designation as to series.

(14) In the event this Certificate of Designations is amended or modified by the
     parties hereto, the holders of the Series Two Preferred Units issued by the
     Partnership and the Series Three Preferred Units issued by the Partnership
     in accordance with the Source Agreements shall each have the right to
     elect, by vote of a majority-in-interest of such securities, to adopt
     amendments or modifications of their respective securities comparable to
     the amendments or modifications of this Certificate, and in the event of
     any modification or amendment of such securities, the holders of Series A
     Preferred Stock shall have the right to elect, by vote of a majority-in-
     interest of the Series A Preferred Stock, to adopt amendments or
     modifications of this Certificate of Designations comparable to amendments
     and modifications of such securities. The Corporation agrees for the
     benefit of the holders of Series A Preferred Stock that the Corporation, as
     the general partner of the Partnership, shall not permit the amendment or
     modification of such other securities without causing this Section 14 to be
     given full effect, and the Corporation shall take such action as is
     reasonably appropriate or necessary to give full effect to this Section 14.

                                       29

 
 Exhibit A to the Certificate of Designations for the Series A Preferred Stock


                    NOTICE OF ELECTION BY HOLDER TO CONVERT
                  SERIES A PREFERRED STOCK INTO COMMON STOCK


     The undersigned holder of Series A Preferred Stock hereby (i) elects to
convert the number of shares of Series A Preferred Stock in Boston Properties,
Inc. (the "Corporation") set forth below into shares of Common Stock in
accordance with the terms of the Certificate of Designations relating to the
Series A Preferred Stock; and (ii) directs that any cash in lieu of fractional
shares of Common Stock that may be deliverable upon such conversion be delivered
to the address specified below.  The undersigned hereby represents, warrants,
and certifies that the undersigned (a) has title to such shares of Series A
Preferred Stock, free and clear of the rights or interests of any other person
or entity other than the Corporation; (b) has the full right, power, and
authority to cause the conversion of such shares of Series A Preferred Stock as
provided herein; and (c) has obtained the consent or approval of all persons or
entities, if any, having the right to consent or approve such conversion.


Name of holder of Series A Preferred Stock:  ___________________________________
                                             (Please Print: Exact Name as 
                                              Registered with Corporation)


Date of this Notice:_________________________



Date the shares of Series A Preferred Stock are to be converted:_____________/1/


Number of shares of Series A Preferred Stock to be converted:_________________



     _____________________________________________________________________
     (Signature of Holder: Sign Exact Name as Registered with Corporation)


     _____________________________________________________________________
     (Street Address)


     _____________________________________________________________________
     (City)                    (State)                    (Zip Code)



     Signature Guaranteed by:


     _____________________________________________

________________________

/1/  Not earlier than 15 days nor later than 60 days after the date this Notice
is deposited in the U.S. mails (certified mail, postage prepaid, return receipt
requested) or deposited with a nationally recognized overnight courier
guaranteeing next business day delivery.

                                       30

 
 Exhibit B to the Certificate of Designations for the Series A Preferred Stock


                    NOTICE OF ELECTION BY HOLDER TO REDEEM
                       SERIES A PREFERRED STOCK FOR CASH


     The undersigned holder of Series A Preferred Stock hereby (i) elects to
redeem the number of shares of Series A Preferred Stock in Boston Properties,
Inc. (the "Corporation") set forth below for the redemption price determined in
accordance with the terms of the Certificate of Designations (the "Certificate")
relating to the Series A Preferred Stock; and (ii) directs that such redemption
price be delivered by certified check to the address specified below. The
undersigned hereby represents, warrants, and certifies that the undersigned (a)
has title to such shares of Series A Preferred Stock, free and clear of the
rights or interests of any other person or entity other than the Corporation;
(b) has the full right, power, and authority to cause the redemption of such
shares of Series A Preferred Stock as provided herein; and (c) has obtained the
consent or approval of all persons or entities, if any, having the right to
consent or approve such redemption. The undersigned hereby acknowledges that,
except as provided in the Certificate, dividends on the shares of Series A
Preferred Stock to be redeemed shall cease to accrue on the redemption date
indicated below.


Name of holder of Series A Preferred Stock:  ___________________________________
                                             (Please Print: Exact Name as 
                                              Registered with Corporation)


Date of this Notice:_________________________



Option Strike Date on which the shares of Series A Preferred Stock are to be
redeemed:________________


Number of shares of  Series A Preferred Stock to be redeemed:_________________



     _____________________________________________________________________
     (Signature of Holder: Sign Exact Name as Registered with Corporation)


     _____________________________________________
     (Street Address)


     _____________________________________________
     (City)            (State)      (Zip Code)



     Signature Guaranteed by:


     _____________________________________________


Note:  Redemptions are subject to reduction and proration as provided in the
       Certificate of Designations in respect of the Series A Preferred Stock.

                                      31