AMERICAN INDUSTRIAL PROPERTIES REIT INC
8-K, 1998-08-05
REAL ESTATE INVESTMENT TRUSTS
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<PAGE>   1
                       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): July 30, 1998



                       AMERICAN INDUSTRIAL PROPERTIES REIT
             (Exact Name of Registrant as Specified in its Charter)



             Texas                        1-9016                  75-6335572
 (State or Other Jurisdiction of     (Commission File          (I.R.S. Employer
 Incorporation or Organization)          Number)             Identification No.)



         6210 North Beltline Road, Suite 170, Irving, Texas  75063-2656
              (Address of Principal Executive Offices)       (ZIP Code)



        Registrant's telephone number, including area code: (972)756-6000



                                 Not applicable
          (Former Name or Former Address, if Changed Since Last Report)


<PAGE>   2

ITEM 5.  OTHER EVENTS.

     On August 3, 1998, American Industrial Properties REIT (the "Trust")
entered into a definitive agreement providing for a strategic investment by
Developers Diversified Realty Corporation ("DDR") in the Trust. Under the terms
of the Share Purchase and Merger Agreements (the "Agreements"), dated to be
effective as of July 30, 1998, DDR will acquire approximately $115 million of
newly issued common shares of beneficial interest at $15.50 per share. The
investment will be made in two or more fundings. DDR made an initial purchase of
949,147 shares for $14.7 million and additionally acquired 1,258,477 shares in
exchange for five properties previously owned by DDR and valued at approximately
$19.5 million. The total shares acquired represent 19.9% of the Trust's
outstanding shares. DDR will purchase an additional 5,226,583 shares for $81.0
million, increasing its ownership to 40.0% of the Trust's shares on a
fully-diluted basis, following shareholder approval at a Special Meeting of
Shareholders to be held before the end of 1998, to fund property acquisitions.
The funds provided by DDR's investment will be used to continue the Trust's
strategy of consolidating the highly fragmented light industrial property
sector.

     The Trust acquired the five industrial properties ("DDR Portfolio") under a
merger agreement between the Trust and DDR Office Flex Corporation, a wholly
owned subsidiary of DDR. The five properties, consisting of light and bulk
industrial space totaling approximately 464,000 square feet, are located in the
Cleveland, Ohio area and represent the Trust's entry into the Ohio market. 

     Tenant sizes range from 6,426 square feet to 236,225 square feet, with
major tenants including Hardline Services, Reynolds Aluminum, VSA, and Steris.

     The DDR Portfolio includes the following properties:

     (1) HARDLINE SERVICES BUILDING. Hardline Services Building ("Hardline") is
comprised of one building located on 20.0 acres in Aurora, Ohio and contains
236,225 square feet of bulk industrial space. Hardline is 100% leased to one
tenant. Hardline was constructed in 1974 with a 100,000 square foot addition
completed in 1993.

     (2) HERITAGE VSA BUILDING. Heritage VSA Building ("Heritage VSA") is
comprised of one building located on 3.9 acres in Twinsburg, Ohio and contains
85,800 square feet of bulk industrial space. Heritage VSA is 100% leased to one
tenant. Heritage VSA was constructed in 1989.

     (3) ALUMAX BUILDING. Alumax Building ("Alumax") is comprised of one
building on 5.0 acres in Streetsboro, Ohio and contains 66,200 square feet of
bulk industrial space. Alumax is 100% leased to one tenant. Alumax was
constructed in 1982.

     (4) STERIS BUILDING. Steris Building ("Steris") consists of one building
located on 5.7 acres in Mentor, Ohio and contains 40,200 square feet of bulk
industrial space. Steris is 100% leased to one tenant. Steris was constructed in
1980.

     (5) HERITAGE BUSINESS CENTER. Heritage Business Center ("Heritage") is
comprised of one building located on 6.8 acres in Twinsburg, Ohio and contains
35,502 square feet of light industrial space. Heritage is 100% leased to four
tenants. Heritage was constructed in 1990.

     After the acquisition of the DDR Portfolio, the Trust now owns, directly or
through operating partnerships, 52 real estate properties in 13 states. The
Trust's industrial properties are concentrated in the Texas market with 23 of
the 40 industrial properties located in the Dallas, Austin and Houston areas.
The office buildings are primarily located in the west with three of the ten
located in California. The two retail properties are located in Colorado and
Florida.

     Concurrent with entering into the Agreements, the Trust increased its Board
of Trust Managers by four positions and appointed DDR designees Scott A.
Wolstein, Albert T. Adams, Robert H. Gidel and James A. Schoff to the Board. Mr.
Wolstein has been named Chairman of the Board of Trust Managers.


<PAGE>   3

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

(a)  Financial Statements of Businesses Acquired.

     Financial statements will be filed within sixty (60) days from the date
     this report is filed.

(b)  Pro forma Financial Information.

     Pro forma financial information will be filed within sixty (60) days from
     the date this report is filed.

(c)  Exhibits:

    *2.1   Agreement and Plan of Merger by and among the Trust, Developers
           Diversified Realty Corporation ("DDR") and DDR Office Flex 
           Corporation ("DDR Flex") dated July 30, 1998.

    *3.1   Statement of Designation of Series A Preferred Shares of Beneficial
           Interest of the Trust dated July 30, 1998.

    *10.1  Share Purchase Agreement by and between the Trust and DDR dated
           July 30, 1998.

    *10.2  Demand Promissory Note dated July 30, 1998.

    *10.3  Second Amended and Restated Registration Rights Agreement by and
           among the Trust, MS Real Estate Special Situations, Inc. ("MSRE") and
           Morgan Stanley Asset Management Inc. ("MSAM") dated July 30, 1998.

    *10.4  Second Amended and Restated Registration Rights Agreement by and
           between the Trust and USAA Real Estate Company ("USAA") dated
           July 30, 1998.

    *10.5  Registration Rights Agreement by and between the Trust and DDR dated
           July 30, 1998.

    *10.6  First Amended and Restated Registration Rights Agreement by and
           between the Trust and Praedium II Industrial Associates LLC
           ("Praedium") dated July 30, 1998.

    *10.7  Second Amended and Restated Registration Rights Agreement by and
           among the Trust, ABKB/LaSalle Securities Limited Partnership ("ABKB")
           and LaSalle Advisors Limited Partnership ("LaSalle") dated July 30,
           1998.

    *10.8  Letter Agreement by and between MSRE/MSAM and DDR dated July 30,
           1998.

    *10.9  Letter Agreement by and among ABKB, LaSalle and DDR dated July 30,
           1998.

    *10.10 Letter Agreement by and between Praedium and DDR dated July 30,
           1998.

    *10.11 Letter Agreement by and between USAA and DDR dated July 30, 1998.

- --------------------
*Filed herewith.
<PAGE>   4

                                   SIGNATURES


     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.


                                   AMERICAN INDUSTRIAL PROPERTIES REIT




                                   By:  /s/ Charles W. Wolcott
                                        ----------------------------------------
                                        Charles W. Wolcott
                                        President and Chief Executive Officer

Dated:  August 5, 1998


<PAGE>   5


                                  EXHIBIT LIST


    *2.1   Agreement and Plan of Merger by and among the Trust, Developers
           Diversified Realty Corporation ("DDR") and DDR Office Flex 
           Corporation ("DDR Flex") dated July 30, 1998.

    *3.1   Statement of Designation of Series A Preferred Shares of Beneficial
           Interest of the Trust dated July 30, 1998.

    *10.1  Share Purchase Agreement by and between the Trust and DDR dated
           July 30, 1998.

    *10.2  Demand Promissory Note dated July 30, 1998.

    *10.3  Second Amended and Restated Registration Rights Agreement by and
           among the Trust, MS Real Estate Special Situations, Inc. ("MSRE") and
           Morgan Stanley Asset Management Inc. ("MSAM") dated July 30, 1998.

    *10.4  Second Amended and Restated Registration Rights Agreement by and
           between the Trust and USAA Real Estate Company ("USAA") dated
           July 30, 1998.

    *10.5  Registration Rights Agreement by and between the Trust and DDR dated
           July 30, 1998.

    *10.6  First Amended and Restated Registration Rights Agreement by and
           between the Trust and Praedium II Industrial Associates LLC
           ("Praedium") dated July 30, 1998.

    *10.7  Second Amended and Restated Registration Rights Agreement by and
           among the Trust, ABKB/LaSalle Securities Limited Partnership ("ABKB")
           and LaSalle Advisors Limited Partnership ("LaSalle") dated July 30,
           1998.

    *10.8  Letter Agreement by and between MSRE/MSAM and DDR dated July 30,
           1998.

    *10.9  Letter Agreement by and among ABKB, LaSalle and DDR dated July 30,
           1998.

    *10.10 Letter Agreement by and between Praedium and DDR dated July 30,
           1998.

    *10.11 Letter Agreement by and between USAA and DDR dated July 30, 1998.

- --------------------
*Filed herewith.

<PAGE>   1
                                                                     EXHIBIT 2.1


- --------------------------------------------------------------------------------


                          AGREEMENT AND PLAN OF MERGER

                                     among

                      AMERICAN INDUSTRIAL PROPERTIES REIT,

                   DEVELOPERS DIVERSIFIED REALTY CORPORATION

                                      and

                          DDR OFFICE FLEX CORPORATION

                                  dated as of

                                 July 30, 1998


- --------------------------------------------------------------------------------
<PAGE>   2
                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                                      Page
                                                                                                                      ----
<S>                                                                                                                    <C>
ARTICLE 1  DEFINITIONS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   1

ARTICLE 2  THE MERGER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
         Section 2.1      The Merger  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
         Section 2.2      Closing; Effective Time of Merger . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
         Section 2.3      Certificate of Incorporation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
         Section 2.4      Effect of the Merger  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   5

ARTICLE 3  MERGER CONSIDERATION; STATUS AND CONVERSION OF SHARES  . . . . . . . . . . . . . . . . . . . . . . . . . .   5
         Section 3.1      Conversion or Cancellation of Shares in the Merger  . . . . . . . . . . . . . . . . . . . .   5
         Section 3.2      Payment for Buyer Sub Shares in the Merger  . . . . . . . . . . . . . . . . . . . . . . . .   6
         Section 3.3      No Further Ownership Rights in Shares . . . . . . . . . . . . . . . . . . . . . . . . . . .   7
         Section 3.4      Fractional Shares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   7

ARTICLE 4  REPRESENTATIONS AND WARRANTIES OF BUYER AND BUYER SUB  . . . . . . . . . . . . . . . . . . . . . . . . . .   7
         Section 4.1      Organization and Qualification; Subsidiaries  . . . . . . . . . . . . . . . . . . . . . . .   7
         Section 4.2      Authority Relative to Agreements; Board Approval  . . . . . . . . . . . . . . . . . . . . .   8
         Section 4.3      Capital Stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   8
         Section 4.4      No Conflicts; No Defaults; Required Filings and Consents  . . . . . . . . . . . . . . . . .   9
         Section 4.5      Insurance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  10
         Section 4.6      Litigation; Compliance With Law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  10
         Section 4.7      Absence of Certain Changes or Events  . . . . . . . . . . . . . . . . . . . . . . . . . . .  10
         Section 4.8      Tax Matters; REIT & Partnership Status  . . . . . . . . . . . . . . . . . . . . . . . . . .  10
         Section 4.9      Compliance with Agreements  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12
         Section 4.10     Financial Records; Certificate of Incorporation and By-laws; Corporate Records  . . . . . .  14
         Section 4.11     Properties  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  15
         Section 4.12     Environmental Matters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  19
         Section 4.13     Employees and Benefit Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  22
         Section 4.14     Labor Matters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  22
         Section 4.15     Confirmation of Representations and Warranties  . . . . . . . . . . . . . . . . . . . . . .  22
         Section 4.16     Brokers and Finders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  22
         Section 4.17     Affiliate Transactions  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  22
         Section 4.18     Knowledge Defined . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  22

ARTICLE 5  REPRESENTATION AND WARRANTY OF THE TRUST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23
         Section 5.1      Confirmation of Representations and Warranties  . . . . . . . . . . . . . . . . . . . . . .  23

ARTICLE 6  JOINT COVENANT OF THE PARTIES  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23
         Section 6.1      Section 368(a) Reorganization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23
</TABLE>





                                      -i-
<PAGE>   3
<TABLE>
<S>                                                                                                                    <C>
ARTICLE 7  CERTAIN ADDITIONAL COVENANTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23
         Section 7.1      Confirmation of Covenants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23
         Section 7.2      Resale  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23
         Section 7.3      Legends; Stop Transfer Orders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  24
         Section 7.4      Post-Closing Delivery of Preferred Shares . . . . . . . . . . . . . . . . . . . . . . . . .  24
         Section 7.6      Liability of Buyer  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  24
         Section 7.7      Title Insurance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25

ARTICLE 8  CLOSING DELIVERIES AND CLOSING CONDITIONS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
         Section 8.1      Closing Deliveries  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
         Section 8.2      Conditions to Closing for Buyer and Buyer Sub . . . . . . . . . . . . . . . . . . . . . . .  26
         Section 8.3      Conditions to Closing for the Trust . . . . . . . . . . . . . . . . . . . . . . . . . . . .  27

ARTICLE 9  SURVIVAL; INDEMNIFICATION  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  29
         Section 9.1      Survival  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  29
         Section 9.2      Indemnification by Buyer or the Trust . . . . . . . . . . . . . . . . . . . . . . . . . . .  29
         Section 9.3      Third-Party Claims  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  30

ARTICLE 10 TERMINATION  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
         Section 10.1     Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
         Section 10.2     Procedure and Effect of Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31

ARTICLE 11 MISCELLANEOUS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
         Section 11.1     Counterparts  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
         Section 11.2     Governing Law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
         Section 11.3     Jurisdiction  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
         Section 11.4     Entire Agreement  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  32
         Section 11.5     Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  32
         Section 11.6     Successors and Assigns  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33
         Section 11.7     Amendments and Waivers  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33
         Section 11.8     Interpretation; Absence of Presumption  . . . . . . . . . . . . . . . . . . . . . . . . . .  33
         Section 11.9     Severability  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34
         Section 11.10    Further Assurances  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34
         Section 11.11    Specific Performance  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34
</TABLE>





                                      -ii-
<PAGE>   4
                                   SCHEDULES

Schedule 4.3(a)                   Shareholder List
Schedule 4.4(d)                   Defaults
Schedule 4.6(a)                   Litigation; Compliance with Law
Schedule 4.7                      Absence of Certain Changes or Events
Schedule 4.9(c)                   Indebtedness; Joint Venture and
                                    Partnership Agreements
Schedule 4.9(d)                   Development, Construction,
                                    Management and Leasing Arrangements
Schedule 4.9(e)                   Other Material Agreements
Schedule 4.10(a)                  Corporate Records
Schedule 4.11(a)                  Properties
Schedule 4.11(b)                  Property Violations/Engineering
                                    Reports
Schedule 4.11(c)                  Property Road Changes
Schedule 4.11(f)                  Material Lease Information
Schedule 4.11(g)                  Property Letters of Intent or
                                    Similar Understandings
Schedule 4.11(h)                  Property Rights of First
                                    Refusal
Schedule 4.11(i)                  Property Noncompliance and
                                    Capital Expenditure Budget and
                                    Schedule
Schedule 4.12(a)                  Environmental Permits
Schedule 4.12(e)                  Environmental Concerns
Schedule 4.12(f)                  Environmental Reports
Schedule 4.14                     Collective Bargaining; Labor Union
                                    Agreements
Schedule 4.17                     Individuals for Knowledge Test
Schedule 5.4(d)                   Conflicts, Violations and Defaults


                                    EXHIBITS

Exhibit A                         Trust Declaration
Exhibit B                         Buyer Sub Certificate





                                     -iii-
<PAGE>   5
                 THIS AGREEMENT AND PLAN OF MERGER (the "Agreement"), dated as
of July 30, 1998, is made among American Industrial Properties REIT, a Texas
real estate investment trust (the "Trust"), Developers Diversified Realty
Corporation, an Ohio corporation ("Buyer"), and DDR Office Flex Corporation, a
Delaware corporation and a private REIT ("Buyer Sub").


                                   RECITALS:

                 WHEREAS, the Trust wishes to acquire, and Buyer wishes to
sell, Buyer Sub in a tax-free merger transaction pursuant to Section 368(a) of
the Code in exchange for an aggregate of 1,258,478 of the Trust's common shares
of beneficial interest, $0.10 par value ("Trust Common Shares"), having the
terms set forth in the Third Amended and Restated Declaration of Trust attached
as Exhibit A (the "Trust Declaration"); and

                 WHEREAS, Buyer and the Trust are entering into this Agreement
to provide for such merger and to establish various rights and obligations in
connection with this Agreement and the Share Purchase Agreement of even date
herewith between the Trust and Buyer (the "Purchase Agreement");

                 NOW, THEREFORE, in consideration of the premises and the
representations, warranties, covenants and agreements contained herein, and for
other good and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged, and intending to be legally bound hereby, the parties
hereto hereby agree as follows:


                                   ARTICLE 1

                                  DEFINITIONS

                 Capitalized terms used herein, but not defined herein, shall
have the meanings ascribed to them in the Purchase Agreement.

                 As used in this Agreement, the following terms have the
following respective meanings:

                 "Abstracts" has the meaning set forth in Section 4.11(f).

                 "Buyer" has the meaning set forth in the first paragraph
hereof.

                 "Buyer Sub" has the meaning set forth in the first paragraph
hereof.

                 "Buyer Sub Board" means the board of directors of Buyer Sub.





                                      -1-
<PAGE>   6
                 "Buyer Sub By-laws" means the By-laws of Buyer Sub.

                 "Buyer Sub Certificate" means the Certificate of Incorporation
of Buyer Sub in the form attached hereto as Exhibit B.

                 "Buyer Sub Reports" has the meaning set forth in Section
4.10(a).

                 "Buyer Sub Shares" means the Nonvoting Common Shares, the
Voting Common Shares and the Preferred Shares of Buyer Sub issued and
outstanding immediately prior to the Effective Time.

                 "Capital Expenditure Budget and Schedule" has the meaning set
forth in Section 4.11(i).

                 "Certificates" has the meaning set forth in Section 3.2(b).

                 "Certificate of Merger" has the meaning set forth in Section
2.2.

                 "Closing" has the meaning set forth in Section 2.2.

                 "Closing Date" has the meaning set forth in Section 2.2.

                 "Commitment" has the meaning set forth in Section 4.7.

                 "Cure Notice" has the meaning set forth in Section 2.5(b).

                 "DGCL" has the meaning set forth in Section 2.1.

                 "Effective Time" has the meaning set forth in Section 2.2.

                 "Employee Benefit Plans" has the meaning set forth in Section
4.12(h).

                 "Environmental Claim" has the meaning set forth in Section
4.12(g)(ii).

                 "Environmental Laws" has the meaning set forth in Section
4.12(g)(iii).

                 "Environmental Permits" has the meaning set forth in Section
4.12(a).

                 "Environmental Reports" has the meaning set forth in Section
4.12(a).

                 "Executive Summaries of Environmental Reports" has the meaning
set forth in Section 4.12(f).





                                      -2-
<PAGE>   7
                 "Indemnified Party" has the meaning set forth in Section 9.3.

                 "Insurance Policies" has the meaning set forth in Section 4.5.

                 "Leases" has the meaning set forth in Section 4.11(f).

                 "Loss and Expense" has the meaning set forth in Section
9.2(a).

                 "Material Adverse Effect" means a material adverse effect on
the financial condition, results of operations, business or prospects of Buyer
Sub, Office Flex I and Office Flex II, taken as a whole.

                 "Material Leases" has the meaning set forth in Section
4.11(f).

                 "Materials of Environmental Concern" has the meaning set forth
in Section 4.12(g)(iv).

                 "Merger" has the meaning set forth in Section 2.1.

                 "Merger Shares" has the meaning set forth in Section 3.1(c).

                 "Nonvoting Common Consideration" has the meaning set forth in
Section 3.1(a).

                 "Nonvoting Common Shares" has the meaning set forth in Section
3.1(a).

                 "Office Flex I" has the meaning set forth in Section 4.1(b).

                 "Office Flex II" has the meaning set forth in Section 4.1(b).

                 "Permitted Liens" means (i) Liens (other than Liens imposed
under ERISA or any Environmental Law or in connection with any Environmental
Claim) for taxes or other assessments or charges of Governmental Authorities
that are not yet delinquent or that are being contested in good faith by
appropriate proceedings in each case, and with respect to which adequate
reserves or other appropriate provisions are being maintained by Buyer Sub,
Office Flex I or Office Flex II to the extent required by GAAP, (ii) statutory
Liens of landlords, carriers, warehousemen, mechanics, materialmen and other
Liens (other than Liens imposed under ERISA or any Environmental Law or in
connection with any Environmental Claim) imposed by law and created in the
ordinary course of business for amounts not yet overdue or which are being
contested in good faith by appropriate proceedings, and in each case with
respect to which adequate reserves or other appropriate provisions are being
maintained by





                                      -3-
<PAGE>   8
Buyer Sub, Office Flex I or Office Flex II to the extent required by GAAP and
which do not exceed $25,000 in the aggregate, (iii) the Leases, (iv) easements,
rights-of-way and covenant restrictions which are customary and typical for
properties similar to the Properties and which do not (x) interfere materially
with the ordinary conduct of any Property or the business of Buyer Sub, Office
Flex I and Office Flex II taken as a whole or (y) detract materially from the
value or usefulness of the Property to which they apply, (v) the Liens which
were granted by Buyer Sub, Office Flex I or Office Flex II to lenders pursuant
to credit agreements in existence on the date hereof which are described in
Schedule 4.9(c), and (vi) such imperfections of title and encumbrances, if any,
as would not individually or in the aggregate reasonably be expected to result
in a Material Adverse Effect.

                 "Preferred Shares" has the meaning set forth in Section 3.1(c).

                 "Property" and "Properties" have the meanings set forth in 
Section 4.11(a).

                 "Property Restrictions" has the meaning set forth in Section
4.11(a).

                 "Purchase Agreement" has the meaning set forth in the second
paragraph of the Recitals to this Agreement.

                 "REIT" has the meaning set forth in Section 4.8(b).

                 "Release" has the meaning set forth in Section 4.12(g)(v).

                 "Rent Roll" has the meaning set forth in Section 4.11(f).

                 "Shareholders" means the holders of all of the issued and
outstanding shares of capital stock of Buyer Sub.

                 "Surviving Corporation" has the meaning set forth in Section
2.1.


                 "TREITA" has the meaning set forth in Section 2.1.

                 "Trust" has the meaning set forth in the first paragraph of
this Agreement.

                 "Trust Declaration" means the Third Amended and Restated
Declaration of Trust of the Trust attached hereto as Exhibit A.

                 "Voting Common Consideration" has the meaning set forth in
Section 3.1(b).





                                      -4-
<PAGE>   9
                 "Voting Common Shares" has the meaning set forth in Section
3.1(b).


                                   ARTICLE 2

                                   THE MERGER

                 Section 2.1      The Merger.  On the terms and subject to the
conditions hereof, at the Effective Time and in accordance with the Texas Real
Estate Investment Trust Act (the "TREITA") and the General Corporation Law of
the State of Delaware (the "DGCL"), Buyer Sub shall be merged with and into the
Trust (the "Merger") which shall be the surviving entity of the Merger (the
"Surviving Corporation").  At the Effective Time, the separate existence of
Buyer Sub shall cease and the Surviving Corporation shall continue in existence
under the TREITA.

                 Section 2.2      Closing; Effective Time of Merger.  The
closing of the Merger (the "Closing") shall take place at 10:00 a.m., local
time, at the offices of Liddell, Sapp, Zivley, Hill & LaBoon, L.L.P., 2001 Ross
Avenue, Suite 3000, Dallas, Texas 75201, on the Business Day following the
satisfaction or waiver of the last to be satisfied or waived of the conditions
set forth in Sections 8.2 and 8.3 (other than those conditions that are to be
satisfied concurrently with the Closing), or on such other date or at such
other time and place as the parties shall agree on in writing (the "Closing
Date").  At the Closing the parties hereto shall cause a certificate of merger
(the "Certificate of Merger") to be executed and filed with each of the County
Recorder of Dallas County, Texas, and the Secretary of State of the State of
Delaware in accordance with the DGCL.  The Merger shall become effective as of
the date and time (the "Effective Time") of the last of such filings or such
later time as may be specified in the Certificate of Merger.

                 Section 2.3      Certificate of Incorporation.  The
Certificate of Merger shall provide that, at the Effective Time, the Trust
Declaration of the Trust shall be the Trust Declaration of the Surviving
Corporation.

                 Section 2.4      Effect of the Merger.  Subject to the
foregoing, the effects of the Merger shall be as provided in the applicable
provisions of the TREITA and the DGCL.


                                   ARTICLE 3

             MERGER CONSIDERATION; STATUS AND CONVERSION OF SHARES

                 Section 3.1      Conversion or Cancellation of Shares in the
Merger.  On the terms and subject to the conditions of this Agreement, at the
Effective Time, by virtue of the Merger and without any action on the part of
the holders thereof, the shares





                                      -5-
<PAGE>   10
of Buyer Sub shall automatically be converted or canceled, as the case may be,
in the following manner:

                 (a)      Each outstanding share of Buyer Sub's Class B
Nonvoting Common Stock, $.01 par value per share (the "Nonvoting Common
Shares"), shall be converted into the right to receive 2,515.6657 Trust Common
Shares from the Trust (the "Nonvoting Common Consideration").

                 (b)      Each outstanding share of Buyer Sub's Class A Voting
Common Stock, $.01 par value per share (the "Voting Common Shares"), shall be
converted into the right to receive 6.4516 Trust Common Shares from the Trust
(the "Voting Common Consideration" and together with the Nonvoting Common
Consideration, the "Merger Shares").

                 (c)      Each outstanding share of Buyer Sub's Nonvoting
Preferred Stock, $.01 par value per share (the "Preferred Shares"), shall be
converted into the right to receive $100.00 in cash or by check from the Trust.

                 (d)      At the Effective Time, any share of stock of Buyer
Sub held in treasury immediately prior to the Effective Time shall be canceled
and retired and no consideration shall be delivered with respect thereto.

                 Section 3.2      Payment for Buyer Sub Shares in the Merger.
The manner of making payment for, and conversion of, Buyer Sub Shares in the
Merger shall be as follows:

                          Within five Business Days of the Effective Time,
Buyer shall surrender and deliver to the Trust the certificates representing
the Voting Common Shares and the Nonvoting Common Shares with all necessary
stock powers, share transfer and other documentary stamps attached and, within
30 days after the Effective Time, Buyer shall surrender and deliver to the
Trust the certificates representing the Preferred Shares with all necessary
stock powers, share transfer and other documentary stamps attached (all such
certificates for the Nonvoting Common Shares, the Voting Common Shares, and the
Preferred Shares together, the "Certificates"). Upon such surrender and
delivery, each holder of Certificates shall receive (i) a certificate
representing the number of whole Trust Common Shares into which the Nonvoting
Common Shares and the Voting Common Shares owned by such Shareholder have been
converted pursuant to Section 3.1 and a payment of cash in lieu of any
fractional Share otherwise issuable to the Shareholder as provided in Section
3.4, or (ii) a payment in cash representing the consideration into which the
Preferred Shares owned by such Shareholder have been converted pursuant to
Section 3.1, as applicable.  Until so surrendered, each Certificate shall
represent solely the right to receive the Trust Common Shares or payment with
respect to each of the Buyer Shares represented thereby.   No interest will be
paid or accrued on the cash payable upon the surrender of the Certificates.  No
dividends with respect to Trust Common Shares with a record date





                                      -6-
<PAGE>   11
after the Effective Time shall be paid to the holder of any Certificate with
respect to the Trust Common Shares represented thereby and no cash payment in
lieu of fractional shares shall be paid to any Shareholder pursuant to Section
3.4, in each case until the surrender of such Certificate in accordance with
this Article 3.

                 Section 3.3      No Further Ownership Rights in Shares. All
Merger Shares issued, or cash payments made, upon surrender of a Certificate in
accordance with the terms hereof shall be deemed to have been issued in full
satisfaction of all rights pertaining to the Buyer Sub Shares represented
thereby, and there shall be no further registration of transfers on the stock
transfer books of Buyer Sub of Buyer Sub Shares outstanding immediately prior
to the Effective Time.

                 Section 3.4      Fractional Shares.  No fractional Trust
Common Shares shall be issued in the Merger and fractional shares shall not
entitle the owner thereof to vote or to any rights of a shareholder of the
Trust.  In lieu of any fractional Trust Common Shares that a Shareholder would
otherwise be entitled to receive as a result of the Merger such fractional
Trust Common Shares shall be aggregated and if a fractional Trust Common Share
results from such aggregation, that Shareholder shall receive an amount in cash
determined by multiplying $15.50 by the fraction of a Trust Common Share that
such Shareholder would otherwise have been entitled to receive by virtue of the
Merger.


                                   ARTICLE 4

             REPRESENTATIONS AND WARRANTIES OF BUYER AND BUYER SUB

                 Except for the representation and warranty made in Section
4.15, which is made only by Buyer, Buyer and Buyer Sub hereby severally
represent and warrant to the Trust as follows:

                 Section 4.1      Organization and Qualification; Subsidiaries.
(a) Buyer Sub is a corporation duly organized, validly existing and in good
standing under the laws of the State of Delaware. Buyer Sub has all requisite
corporate power and authority to own, operate, lease and encumber its
properties and carry on its business as now conducted, and to enter into this
Agreement and to perform its obligations hereunder.

                 (b)      DDR Office Flex I LLC, an Ohio limited liability
company ("Office Flex I"), and DDR Office Flex II LLC, an Ohio limited
liability company ("Office Flex II"), are the only subsidiaries of Buyer Sub
and each is a limited liability company duly organized, validly existing and in
good standing under the laws of Ohio, and has the limited liability company
power and authority to own the Properties and carry on its business as it is
now being conducted.





                                      -7-
<PAGE>   12
                 (c)      Each of Buyer Sub, Office Flex I and Office Flex II
is duly qualified to do business and in good standing in such jurisdictions in
which the ownership of its property or the conduct of its business requires
such qualification, except for any jurisdiction in which any failure to be so
qualified or to be in good standing would not, individually or in the
aggregate, reasonably be expected to result in a Material Adverse Effect.

                 (d)      All of the issued and outstanding equity interests in
each of Office Flex I and Office Flex II are duly authorized, validly issued,
fully paid and nonassessable, and are owned by Buyer Sub free and clear of all
Liens.

                 Section 4.2      Authority Relative to Agreements; Board
Approval.  (a) The execution, delivery and performance of this Agreement and of
all of the documents and instruments delivered in connection herewith by Buyer
Sub are within the corporate power of Buyer Sub.  This Agreement is, and the
other documents and instruments required hereby will be, when executed and
delivered by Buyer Sub, the valid and binding obligations of Buyer Sub,
enforceable against Buyer Sub in accordance with their respective terms subject
only to bankruptcy, insolvency, reorganization, moratorium or similar laws at
the time in effect affecting the enforceability or right of creditors generally
and to general equitable principles which may limit the right to obtain
equitable remedies.

                 (b)      The Buyer Sub Board and the Shareholders with voting
rights with respect to this Agreement have approved this Agreement and the
transactions contemplated hereby.

                 Section 4.3      Capital Stock.  (a) The authorized capital
stock of Buyer Sub consists of 100 Voting Common Shares, 500 Nonvoting Common
Shares and 1500 Preferred Shares.  As of the date hereof, there are 100 Voting
Common Shares, 500 Nonvoting Common Shares and 237 Preferred Shares issued and
outstanding.  Each Shareholder owns the number of and class of Buyer Sub Shares
set forth next to that Shareholder's name on Schedule 4.3(a).  All such issued
and outstanding Buyer Sub Shares are duly authorized, validly issued, fully
paid, nonassessable and free of preemptive rights.  Buyer Sub has no
outstanding bonds, debentures, notes or other obligations the holders of which
have the right to vote (or which are convertible into or exercisable for
securities the holders of which have the right to vote) with the Shareholders
on any matter.  There are no existing options, warrants, calls, subscriptions,
convertible securities, or other rights, agreements or commitments which
obligate Buyer Sub to issue, transfer or sell any shares of capital stock or
other equity interests of Buyer Sub.

                 (b)      Neither of Office Flex I or Office Flex II has issued
or granted securities convertible into interests in Buyer Sub and neither of
Office Flex I or Office Flex II is a party to any outstanding commitment of any
kind relating to, or any presently effective agreement or understanding with
respect to,





                                      -8-
<PAGE>   13
interests in Buyer Sub or in Office Flex I or Office Flex II, whether issued or
unissued.

                 (c)      Except for Buyer Sub's interests in Office Flex I and
Office Flex II, none of Buyer Sub, Office Flex I or Office Flex II owns
directly or indirectly any interest or investment (whether equity or debt) in
any corporation, partnership, joint business, trust or other legal entity
(other than investments in short-term investment securities).

                 Section 4.4      No Conflicts; No Defaults; Required Filings
and Consents.  Neither the execution and delivery by Buyer Sub hereof nor the
consummation by Buyer Sub of the transactions contemplated hereby in accordance
with the terms hereof, will:

                 (a)      conflict with or result in a breach of any provisions
         of the Buyer Sub Certificate or the Buyer Sub By-laws or of any
         governing instrument of either Office Flex I or Office Flex II;

                 (b)      result in a breach or violation of, a default under,
         or the triggering of any payment or other obligation pursuant to, or
         accelerate vesting under, any Buyer Sub, Office Flex I or Office Flex
         II stock option plan, option plan or similar compensation plan or any
         grant or award made under any of the foregoing;

                 (c)      violate or conflict with any statute, regulation,
         judgment, order, writ, decree or injunction applicable to Buyer Sub,
         Office Flex I or to Office Flex II;

                 (d)      except as described in Schedule 4.4(d), violate or
         conflict with or result in a breach of any provision of, or constitute
         a default (or any event which, with notice or lapse of time or both,
         would constitute a default) under, or result in the termination or in
         a right of termination or cancellation of, or accelerate the
         performance required by, or result in the creation of any Lien upon
         any of the properties of Buyer Sub, Office Flex I or Office Flex II
         under, or result in being declared void, voidable or without further
         binding effect, any of the terms, conditions or provisions of any
         note, bond, mortgage, indenture, deed of trust or any franchise,
         permit, lease, contract, agreement or other instrument, commitment or
         obligation to which Buyer Sub, Office Flex I or Office Flex II is a
         party, or by which Buyer Sub, Office Flex I or Office Flex II or any
         of their properties is bound or affected; or

                 (e)      require any consent, approval or authorization of, or
         declaration, filing or registration with, any Government Authority,
         other than any required Filings, and any filings required to be made
         with the Delaware Department of Taxation.





                                      -9-
<PAGE>   14
                 Section 4.5      Insurance.  Buyer Sub maintains insurance
policies covering the assets, business, equipment, properties, operations,
employees, officers and managers of Buyer Sub, Office Flex I and Office Flex II
(collectively, the "Insurance Policies") which are of a type and in amounts
customarily carried by Persons similar in size to Buyer Sub conducting
businesses similar to those of Buyer Sub.  There is no material claim by Buyer
Sub, Office Flex I or Office Flex II pending under any of the Insurance
Policies as to which coverage has been questioned, denied or disputed by the
underwriters of such policies.

                 Section 4.6      Litigation; Compliance With Law. (a) Except
as disclosed in Schedule 4.6(a), there are no Actions pending or, to Buyer's
knowledge, threatened against Buyer Sub, Office Flex I or Office Flex II that
would, individually or in the aggregate, reasonably be expected to result in a
Material Adverse Effect, or which question the validity of this Agreement or of
any action taken or to be taken in connection herewith. Except as disclosed in
Schedule 4.6(a), there are no continuing orders, injunctions or decrees of any
Government Authority to which Buyer Sub, Office Flex I or Office Flex II is a
party or by which any of its properties or assets are bound.

                 (b)      None of Buyer Sub, Office Flex I or Office Flex II is
in material violation of any statute, rule, regulation, order, writ, decree or
injunction of any Government Authority or any body having jurisdiction over it
or any of its properties which, if enforced, would, individually or in the
aggregate, reasonably be expected to result in a Material Adverse Effect.

                 Section 4.7      Absence of Certain Changes or Events.  Except
as disclosed in Schedule 4.7 or in any Buyer Sub Report, since the date of
formation of each of Buyer Sub, Office Flex I and Office Flex II, each has
conducted its business only in the ordinary course of such business and has not
acquired any real estate or entered into any financing arrangement in
connection therewith, and there has not been (a) any change, circumstance or
event that would reasonably be expected to result in a Material Adverse Effect,
(b) any declaration, setting aside or payment of any dividend or other
distribution with respect to the Buyer Sub Shares, (c) any commitment,
contractual obligation, borrowing, capital expenditure or transaction (each, a
"Commitment") entered into by it other than Commitments which would not,
individually or in the aggregate, be expected to result in a Material Adverse
Effect, or (d) any change in its accounting principles, practices or methods.

                 Section 4.8      Tax Matters; REIT & Partnership Status. (a)
Each of Buyer Sub, Office Flex I and Office Flex II has timely filed with the
appropriate taxing authority all Tax Returns required to be filed by it or has
timely requested extensions and any such request has been granted and has not
expired.  Each such Tax Return is complete and accurate in all material
respects.  All information shown on any Tax Return is





                                      -10-
<PAGE>   15
correct in all material respects, and all Taxes shown as owed by Buyer Sub,
Office Flex I or Office Flex II on any Tax Return have been paid or accrued,
except for Taxes contested in good faith and for which adequate reserves have
been taken.  Each of Buyer Sub, Office Flex I and Office Flex II has properly
accrued all material Taxes for periods subsequent to the periods covered by
such Tax Returns as required by GAAP.  None of Buyer Sub, Office Flex I or
Office Flex II has executed or filed with the IRS or any other taxing authority
any agreement now in effect extending the period for assessment or collection
of any Tax.  None of Buyer Sub, Office Flex I or Office Flex II is a party to
any pending action or proceeding by any taxing authority for assessment or
collection of any Tax, and no claim for assessment or collection of any Tax has
been asserted against it.  No claim has been made by any authority in a
jurisdiction where any of Buyer Sub, Office Flex I or Office Flex II does not
file Tax Returns that it is or may be subject to taxation or reporting in that
jurisdiction.  There is no dispute or claim concerning any information,
reporting or tax liability of Buyer Sub, Office Flex I or Office Flex II (i)
claimed or raised by any taxing authority in writing or (ii) as to which Buyer,
Buyer Sub, Office Flex I or Office Flex II has knowledge.  Buyer Sub is a
"domestically-controlled" REIT within the meaning of Code Section 897(h)(4)(B).
No Person or entity which would be treated as an "individual" for purposes of
Section 542(a)(2) of the Code (as modified by Section 856(h) of the Code) owns
or would be considered to own (taking into account the ownership attribution
rules under Section 544 of the Code, as modified by Section 856(h) of the Code)
in excess of 9.8% of the value of the outstanding equity interests in Buyer
Sub.

                 (b)      Buyer Sub (i) intends in its federal income tax
return (separate from the tax return of Buyer) for the tax year that will end
on December 31, 1998, or for any shorter period for which Buyer Sub will be
required to file a federal income tax return because of the transactions
contemplated by this Agreement, to elect to be taxed as a real estate
investment trust within the meaning of Section 856 of the Code ("REIT") and has
complied (or will comply) with all applicable provisions of the Code relating
to a REIT, from the date of its formation through the date hereof, (ii) has
operated, and will to continue to operate, in such a manner as to qualify as a
REIT for 1998, (iii) has not taken or omitted to take any action which would
reasonably be expected to result in a challenge to its status as a REIT, and,
no such challenge is pending or threatened, and (iv) will not be rendered
unable to qualify as a REIT for federal income tax purposes as a consequence of
the transactions contemplated hereby and by the Purchase Agreement.

                 (c)      No amount or other entitlement that could be received
(whether in cash or property or the vesting of property) as a result of any of
the transactions contemplated hereby by any employee, officer or manager of
Buyer Sub, Office Flex I or Office Flex II or of any of their Affiliates who is
a "disqualified individual" (as such term is defined in proposed





                                      -11-
<PAGE>   16
Treasury Regulation Section 1.28OG-1) under any employment, severance or
termination agreement, other compensation arrangement or plan currently in
effect would be characterized as an "excess parachute payment" (as such term is
defined in Section 280G(b)(2) of the Code).

                 (d)      The disallowance of a deduction under Section 162(m)
of the Code for employee remuneration will not apply to any amount paid or
payable by Buyer Sub, Office Flex I or by Office Flex II under any contract,
stock plan, program, arrangement or understanding currently in effect.

                 (e)      Buyer Sub is eligible to and intends to validly elect
to be taxed as a REIT for federal income tax purposes for calendar year 1998.
Each of Office Flex I and Office Flex II was and continues to be classified as
a partnership for federal income tax purposes for all tax years.

                 (f)      For each taxable year beginning with Buyer Sub's
first taxable year that ends December 31, 1998, the dividends paid by Buyer Sub
on the Buyer Sub Shares have been and will continue to be paid pro rata, with
no preference to any Buyer Sub Shares as compared with other Buyer Sub Shares
of the same class.

                 (g)      Buyer Sub has not actively conducted a business (i)
from which it earns fees for services it performs and (ii) that would cause (a)
Buyer Sub's REIT status to be lost or (b) rents from real property to be
treated as not rent under the Code.

                 (h)      As required by Treasury Regulation Section 1.857-8,
Buyer Sub has maintained and will continue to maintain the necessary records
regarding the actual ownership of its shares, and will timely make (i.e., by
January 30 of each calendar year) the requisite information requests of its
shareholders regarding share ownership and will maintain a list of the Persons
failing or refusing to comply in whole or in part with Buyer Sub's demand for
statements regarding share ownership.  Buyer Sub will continue to maintain such
records for all tax years that it is in existence, as required by law.

                 (i)      Buyer Sub has never owned and will never own more
than ten percent (10%) of the common shares of any corporation other than a
"Qualified REIT Subsidiary," i.e., (i) before 1998, a corporation, all of whose
shares were always owned by Buyer Sub, and (ii) after January 1, 1998, a
corporation (a) all of whose shares are owned by Buyer Sub, and (b) all of
whose earnings and profits existing at the time Buyer Sub acquired all of its
shares are distributed before the end of the tax year in which all of the
shares are acquired.  With respect to Buyer Sub, Office Flex I and Office Flex
II, none has ever had "earnings and profits," as defined in the Code.

                 Section 4.9      Compliance with Agreements. (a) None of Buyer
Sub, Office Flex I or Office Flex II is in default under or





                                      -12-
<PAGE>   17
in violation of any provision of the Buyer Sub Certificate, the Buyer Sub
By-laws, or the operating agreement of either Office Flex I or Office Flex II.

                 (b)      Each of Buyer Sub, Office Flex I and Office Flex II
has filed all reports, registrations and statements, together with any
amendments required to be made with respect thereto, that it was required to
file with any Government Authority and all other reports and statements
required to be filed by it, including any report or statement required to be
filed pursuant to the laws, rules or regulations of the United States, and has
paid all fees or assessments due and payable in connection therewith.  There is
no unresolved violation asserted by any regulatory agency of which Buyer Sub,
Office Flex I or Office Flex II has received any written notice which, if
resolved in a manner unfavorable to Buyer Sub, Office Flex I or Office Flex II
would, individually or in the aggregate, reasonably be expected to result in a
Material Adverse Effect.

                 (c)      Schedule 4.9(c) sets forth (i) a description of all
material indebtedness of Buyer Sub, Office Flex I and Office Flex II, whether
unsecured or secured or collateralized by mortgages, deeds of trust or other
security interests in Property or any other assets of Buyer Sub, Office Flex I
or Office Flex II, or otherwise and (ii) each Commitment currently in effect
entered into by Buyer Sub, Office Flex I or Office Flex II (including any
guarantees of any third party's debt or any obligations in respect of letters
of credit issued for Buyer Sub's, Office Flex I's or Office Flex II's account)
which may result in total payments or liability in excess of $100,000,
excluding Commitments that are terminable on 30 days or less notice, and
excluding Commitments the breach of which would not, individually or in the
aggregate, reasonably be expected to result in a Material Adverse Effect.  None
of Buyer Sub, Office Flex I or Office Flex II is in default, and, to Buyer's
knowledge, no event has occurred which, with the giving of notice or the lapse
of time or both, would constitute a default, under any of the documents
described in clause (i) or (ii) of the first sentence of this paragraph or in
respect of any payment obligations thereunder.  All joint venture and
partnership agreements to which any of Buyer Sub, Office Flex I or Office Flex
II is a party as of the date hereof are described in Schedule 4.9(c), all of
which are in full force and effect as against Buyer Sub, Office Flex I or
Office Flex II and, to Buyer's knowledge, as against the other parties thereto,
and none of Buyer Sub, Office Flex I or Office Flex II is in default, and, to
Buyer's knowledge, no event has occurred which, with the giving of notice or
the lapse of time or both, would constitute a default, with respect to any
obligations thereunder, except as would not, individually or in the aggregate,
reasonably be expected to result in a Material Adverse Effect.  To Buyer's
knowledge, the other parties to such agreements are not in breach of any of
their respective obligations thereunder, except as would not, individually or
in the aggregate, reasonably be expected to result in a Material Adverse
Effect.  To Buyer's





                                      -13-
<PAGE>   18
knowledge, there is no condition with respect to Buyer Sub, Office Flex I or
Office Flex II that would, individually or in the aggregate, reasonably be
expected to result in a Material Adverse Effect.

                 (d)      Except as disclosed in any other Schedule hereto,
Schedule 4.9(d) sets forth a complete and accurate list of all material
agreements to which Buyer Sub, Office Flex I or Office Flex II is a party as of
the date hereof relating to the development or construction of, additions or
expansions to, or management or leasing services for, light industrial
properties or office buildings or other real properties which are currently in
effect and under which Buyer Sub, Office Flex I or Office Flex II currently
has, or expects to incur, any material obligation.

                 (e)      Except for (i) agreements made in the ordinary course
of business with a maturity of less than one year or that are terminable on 30
days or less notice, and (ii) agreements the breach or nonfulfillment of which
would not, individually or in the aggregate, reasonably be expected to result
in a Material Adverse Effect, Schedule 4.9(e) sets forth a complete and
accurate list of all material agreements to which either Buyer Sub, Office Flex
I or Office Flex II is a party as of the date hereof which are not listed in
any other Schedule hereto.  Each agreement listed in Schedule 4.9(e) is in full
force and effect as against Buyer Sub, Office Flex I or Office Flex II and, to
Buyer's knowledge, as against the other parties thereto, no payments, if any,
are delinquent, no notice of default thereunder has been sent or received by
Buyer Sub, Office Flex I or Office Flex II, and, to Buyer's knowledge, no event
has occurred which, with notice or lapse of time or both, would constitute such
a default, except for any default that would not, individually or in the
aggregate, reasonably be expected to result in a Material Adverse Effect.

                 (f)      Buyer Sub has no agreements or written policies in
effect on the date hereof relating to transactions with Affiliates and
potential conflicts of interest.

                 Section 4.10     Financial Records; Certificate of
Incorporation and By-laws; Corporate Records.  (a) The books of account and
other financial records, if any, of Buyer Sub, Office Flex I and Office Flex
II, are in all respects true and complete, have been maintained in accordance
with good business practices, and are accurately reflected in all respects in
all financial statements related to Buyer Sub provided to the Trust, and such
financial statements provided to the Trust are listed in Schedule 4.10(a) (the
"Buyer Sub Reports").

                 (b)      Buyer Sub has delivered or made available to the
Trust true and complete copies of the Buyer Sub Certificate and the Buyer Sub
By-laws, as amended to date, and the operating agreement of each of Office Flex
I and Office Flex II.





                                      -14-
<PAGE>   19
                 (c)      The minute books and other records of corporate or
limited liability company proceedings of Buyer Sub, Office Flex I and Office
Flex II contain accurate records of all meetings of the directors, equity
holders, members, managers and other governing bodies thereof and accurately
reflect in all material respects all other corporate action of the directors,
shareholders and any committees of the Buyer Sub Board, and all actions of the
members and managers of each of Office Flex I and Office Flex II.

                 Section 4.11     Properties.  (a) Schedule 4.11(a) sets forth
a complete and accurate list and the address of all real property owned or
leased by Buyer Sub, Office Flex I or Office Flex II or otherwise used by Buyer
Sub, Office Flex I or Office Flex II in the conduct of their business or
operations.  That real property, together with the land at each address
referenced in Schedule 4.11(a) and all buildings, structures and other
improvements and fixtures located on or under such land and all easements,
rights and other appurtenances to such land (each such property individually, a
"Property" and collectively, the "Properties").  To Buyer's knowledge Office
Flex I or Office Flex II owns good and indefeasible fee simple title to each of
the Properties, in each case free and clear of any Liens, title defects, common
restrictions or covenants, laws, ordinances or regulations affecting use or
occupancy (including zoning regulations and building codes) or reservations of
interests in title (collectively, "Property Restrictions"), except for (i)
Permitted Liens and (ii) Property Restrictions imposed or promulgated by law or
by any Government Authority which are customary and typical for similar
properties.  To Buyer's knowledge, none of the Permitted Liens interferes with,
impairs, or is violated by the present use, occupancy or operation (or if
applicable, development) of any Property and none of the Property Restrictions
interferes with, impairs, or is violated by, the existence of any building or
other structure or improvement which constitutes a part of, or the present use,
occupancy or operation (or, if applicable, development) of, any Property,
except, in each such case, to the extent that any interference, impairment or
violation would not, individually or in the aggregate, reasonably be expected
to have a Material Adverse Effect.

                 (b)      Except as described in Schedule 4.11(b), Buyer has no
knowledge (i) that any currently required certificate, permit or license
(including building permits and certificates of occupancy for tenant spaces)
from any Government Authority having jurisdiction over any Property or any
agreement, easement or other right that is necessary to permit the lawful use,
occupancy or operation of the existing buildings, structures or other
improvements that constitute a part of any of the Properties or which are
necessary to permit the lawful use and operation of any existing driveways,
roads or other areas of ingress and egress to and from any of the Properties
has not been obtained or is not in full force and effect, or of any pending
threat of modification or cancellation of any of same, or (ii) of any violation
by any Property of any federal, state or municipal law, ordinance,





                                      -15-
<PAGE>   20
order, regulation or requirement, including any applicable zoning law or
building code, arising from the use or occupancy of such Property or otherwise.
Except as described in Schedule 4.11(b), Buyer has no knowledge of any current
uninsured physical damage to any Property in excess of $100,000.  To Buyer's
knowledge, except for repairs identified in the Capital Expenditure Budget and
Schedule, each Property: (i) is in good operating condition and repair and is
structurally sound and free of defects, with no material alterations or repairs
being required thereto under applicable law or insurance company requirements,
and (ii) consists of sufficient land areas, driveways and other improvements
and lawful means of access and utility service and capacity to permit the use
thereof in the manner and for the purposes to which it is presently devoted,
except, in each such case, to the extent that failure to meet such standards
would not, individually or in the aggregate, reasonably be expected to have a
Material Adverse Effect.

                 (c)      Buyer has no knowledge (i) that any condemnation,
eminent domain or rezoning proceedings are pending or threatened with respect
to any of the Properties, (ii) except as described in Schedule 4.11(c), that
any road widening or change of grade of any road adjacent to any Property is
underway or has been proposed, (iii) of any proposed change in the assessed
valuation of any Property other than customarily scheduled revaluations, (iv)
of any special assessment made or threatened against any Property, or (v) that
any of the Properties is subject to any so-called "impact fee" or to any
agreement with any Government Authority to pay for sewer extension, oversizing
utilities, lighting or like expenses or charges for work or services by such
Government Authority, except, in the case of each of the foregoing, to the
extent that same would not, individually or in the aggregate, reasonably be
expected to have a Material Adverse Effect.

                 (d)      To Buyer's knowledge, each of the Properties is an
independent unit that does not rely on any facilities located on any property
not included in such Property to fulfill any municipal or governmental
requirement or for the furnishing to such Property of any essential building
systems or utilities, other than facilities the benefit of which inures to the
Properties pursuant to one or more valid easements.  Each of the Properties is
served by public water and sanitary systems and all other utilities, and, to
Buyer's knowledge, each of the Properties has lawful access to public roads, in
all cases sufficient for the current use and occupancy of that Property.  To
Buyer's knowledge, all parcels of land included in each Property that purport
to be contiguous are contiguous and are not separated by strips or gores.  To
Buyer's knowledge, no portion of any Property lies in any flood plain area (as
defined by the U.S. Army Corps of Engineers or otherwise) or includes any
wetlands or vegetation or species protected by any applicable laws.  To Buyer's
knowledge, no improvements constituting a part of any Property encroach on real
property not constituting a part of such Property.





                                      -16-
<PAGE>   21
                 (e)      Except for matters addressed in the Capital
Expenditure Budget and Schedule, no Property fails to comply with the
requirements of the ADA except for such noncompliance as Buyer Sub reasonably
believes will not, individually or in the aggregate, have a Material Adverse
Effect.

                 (f)      Buyer Sub has provided to Buyer an accurate rent roll
for each Property for the month ended June 30, 1998 (the "Rent Roll"), which
identifies and accurately describes each lease of space in each Property
(collectively, the "Leases").  Buyer Sub has delivered to Buyer an abstract of
each Lease (the "Abstracts") which accurately describes the material terms
thereof.  With respect to each Lease for premises larger than 20,000 square
feet of rentable space (collectively, the "Material Leases"), except as
described in Schedule 4.11(f) and except for matters that are not, individually
or in the aggregate, reasonably expected to have a material effect on any
Property, (i) each of the Material Leases is valid and subsisting and in full
force and effect as against each party thereto, and has not been amended,
modified or supplemented, other than by any amendment, modification or
supplement that has been provided to Buyer, (ii) the tenant under each of the
Material Leases is in actual possession of the premises leased thereunder,
(iii) no tenant under any Material Lease is more than 30 days in arrears in the
payment of rent, (iv) none of Buyer Sub, Office Flex I or Office Flex II has
received any written notice from any tenant under any Material Lease of its
intention to vacate, (v) none of Buyer Sub, Office Flex I or Office Flex II has
collected payment of rent under any Material Lease (other than security
deposits) for a period which is more than one month in advance, (vi) no notice
of default has been sent or received by the landlord under any Material Lease
with respect to any defect that remains uncured as of the date hereof, no
default has occurred under any Material Lease and, to Buyer's knowledge, no
event has occurred and is continuing which, with notice or lapse of time or
both, would constitute a default under any Material Lease, (vii) no tenant
under any Material Lease has any purchase option or kick-out right or is
entitled to any concession, allowance, abatement, set-off, rebate or refund,
(viii) none of the Material Leases and none of the rents or other amounts
payable thereunder has been assigned, pledged or encumbered except in
connection with financing secured by the applicable Property, which is
described in Schedule 4.9(c), (ix) no brokerage or leasing commission or other
compensation is due or payable to any Person with respect to or on account of
any of the Material Leases or any extensions or renewals thereof, (x) except as
set forth in the Abstracts, no space of a material size in any Property is
occupied by a tenant rent-free, (xi) no tenant under any of the Material Leases
has asserted any claim which is likely to affect the collection of rent from
such tenant, and (xii) the landlord under each Material Lease has fulfilled all
of its obligations thereunder in respect of tenant improvements and capital
expenditures.  Other than the tenants identified in the Rent Roll and the
Abstracts and parties to easement agreements which constitute Permitted Liens,
no third party has any right to occupy or use any portion of any Property.





                                      -17-
<PAGE>   22
The Rent Roll or the Abstracts include a budget for all material tenant
improvements and similar material work required to be performed by the lessor
under each of the Material Leases.

                 (g)      Schedule 4.11(g) sets forth a complete and accurate
list of all material commitments, letters of intent or written understandings
made or entered into by Buyer Sub, Office Flex I or Office Flex II as of the
date hereof (x) to lease any space larger than 20,000 rentable square feet at
any of the Properties, (y) to sell, mortgage, or pledge any Property or to
otherwise enter into a material transaction or arrangement in respect of the
ownership or financing of any Property, or (z) to purchase or acquire an
option, right of first refusal or similar right in respect of any real
property, which, in any such case has not yet been reduced to a written lease
or contract, and sets forth with respect to each such commitment, letter of
intent or other understanding the principal terms thereof.

                 (h)      Except as set forth in the Rent Roll or the
Abstracts, none of Buyer Sub, Office Flex I or Office Flex II has granted any
outstanding options or has entered into any outstanding contracts with others
for the sale, mortgage, pledge, hypothecation, assignment, sublease, lease or
other transfer of all or any part of any Property, and no Person has any right
or option to acquire, or right of refusal with respect to, Buyer Sub's, Office
Flex I's or Office Flex II's interest in any Property or any part thereof.
Except as described in Schedule 4.11(h), none of Buyer Sub, Office Flex I or
Office Flex II has any outstanding options or rights of first refusal or has
entered into any outstanding contracts with others for the purchase of any real
property.

                 (i)      Schedule 4.11(i) contains a complete and accurate
description of any material noncompliance by any Property, to Buyer's
knowledge, with any law, ordinance, code, health and safety regulation or
insurance requirement (except for the ADA, which is addressed in this respect
in Section 4.11(e) above) other than such noncompliance as would not,
individually or in the aggregate, reasonably be expected to have a Material
Adverse Effect.  Schedule 4.11(i) also sets forth Buyer Sub's, Office Flex I's
and Office Flex II's capital expenditure budget and schedule for each Property
(the "the Capital Expenditure Budget and Schedule"), which describes the
capital expenditures which Buyer Sub, Office Flex I or Office Flex II has
budgeted for such Property for the period from December 31, 1997 through
December 31, 1999.  To Buyer's knowledge, the costs and time schedules for 1998
and 1999 set forth in the Capital Expenditure Budget and Schedule are
reasonable estimates and projections.  Except as described in Schedule 4.11(i),
there are no outstanding, or to Buyer's knowledge, threatened requirements of
any insurance company which has issued an insurance policy covering any
Property, or of any board of fire underwriters or other body exercising similar
functions, requiring any repairs or alterations to be made to any Property.





                                      -18-
<PAGE>   23
                 (j)      Buyer Sub has disclosed to the Trust all adverse
matters known to Buyer Sub with respect to or in connection with the
Properties, including the Leases, which would, individually or in the
aggregate, reasonably be expected to have a Material Adverse Effect.

                 (k)      Each of Buyer Sub, Office Flex I and Office Flex II
has good and sufficient title to all the personal and other property and assets
reflected in its books and records as being owned by it, free and clear of all
liens, except for Permitted Liens which are not, individually or in the
aggregate, reasonably expected to have a material adverse effect on any
Property.

                 Section 4.12     Environmental Matters. (a) To Buyer's
knowledge, each of Buyer Sub, Office Flex I and Office Flex II has obtained and
now maintains as currently valid and effective all permits required under
Environmental Laws (the "Environmental Permits") in connection with the
operation of its businesses and properties, all of which are listed in Schedule
4.12(a). To Buyer's knowledge, except as disclosed in the Executive Summaries
of Environmental Reports, each of Buyer Sub, Office Flex I and Office Flex II,
and each Property, is and has been in compliance with all terms and conditions
of the Environmental Permits and all Environmental Laws, except for any
noncompliance that would not, individually or in the aggregate, reasonably be
expected to have a material adverse effect on any Property.  Buyer has no
knowledge of any circumstances that may prevent or interfere with such
compliance in the future.

                 (b)      Each of Buyer Sub, Office Flex I and Office Flex II
has provided to Buyer all material written information and written
communications (whether from a Government Authority, citizens' group, employee
or other Person) in its possession or control regarding (i) alleged or
suspected noncompliance of any of Properties with any Environmental Laws or
Environmental Permits or (ii) alleged or suspected liability of Buyer Sub,
Office Flex I or Office Flex II under any Environmental Law.

                 (c)      There are no environmental liens or encumbrances on
any of the Properties and, to Buyer's knowledge, no government actions have
been taken or are in process which are reasonably likely to subject any
Property to such liens or other encumbrances.

                 (d)      No Environmental Claim with respect to the operations
or the businesses of Buyer Sub, Office Flex I or Office Flex II, or with
respect to the Properties, has been asserted or, to Buyer's knowledge,
threatened, and, to Buyer's knowledge, no circumstances exist with respect to
Buyer Sub, Office Flex I or Office Flex II or the Properties that would
reasonably be expected to result in any Environmental Claim being asserted, in
any such case, against (i) Buyer Sub, Office Flex I or Office Flex II, or (ii)
any Person whose liability for any Environmental Claims Buyer Sub, Office Flex
I or Office Flex II





                                      -19-
<PAGE>   24
has or may have retained or assumed either contractually or by operation of
law.

                 (e)      Except as disclosed in Schedule 4.12(e) or set forth
in the Executive Summaries of Environmental Reports: (i) none of Buyer Sub,
Office Flex I or Office Flex II has been notified or has any reason to
anticipate being notified of potential responsibility in connection with any
site that has been placed on, or proposed to be placed on, the National
Priorities List or its state or foreign equivalent pursuant to CERCLA, or
analogous state or foreign laws, (ii) to Buyer's knowledge, no Materials of
Environmental Concern are present on, in or under any Property in a manner or
condition that is reasonably likely to give rise to an Environmental Claim
which would reasonably be expected to result in a Material Adverse Effect,
(iii) to Buyer's knowledge, none of Buyer Sub, Office Flex I, Office Flex II or
any tenant of any Property has Released or arranged for the Release of any
Materials of Environmental Concern at any location to an extent or in a manner
which would reasonably be expected to result in a material effect on any
Property, (iv) to Buyer's knowledge, no underground storage tanks, surface
disposal areas, pits, ponds, lagoons, open trenches or equipment is present at
any Property, (v) to Buyer's knowledge, no transformers, capacitors or other
equipment containing fluid with more than 50 parts per million polychlorinated
biphenyls are present at any Property, except for any such transformers,
capacitation or other equipment owned by any utility company, and (vi) to
Buyer's knowledge, no employee, agent, contractor, subcontractor or tenant of
Buyer Sub, Office Flex I or Office Flex II is now or has in the past been
exposed to friable asbestos or asbestos-containing material at any Property.

                 (f)      Schedule 4.12(f) contains a list of the most recent
Phase I environmental reports prepared for Buyer Sub, Office Flex I or Office
Flex II or otherwise in the possession of any of them with respect to the
environmental condition of any Property (collectively, the "Environmental
Reports").  True and complete copies of the executive summaries or conclusions
included in Environmental Reports (collectively, the "Executive Summaries of
Environmental Reports") have been delivered or made available by Buyer Sub to
the Trust.  To Buyer's knowledge, none of the matters disclosed by the
Executive Summaries of Environmental Reports would, individually or in the
aggregate, be reasonably likely to have a Material Adverse Effect.

                 (g)      For purposes of this Section 4.12, the terms listed
below have the following meanings:

                          (i)     "claim" means any action, cause of action,
                 suit, debt, dues, account, reckoning, bond, bill, covenant,
                 contract, controversy, promise, trespass, damage, judgment,
                 execution, claim, liability or demand whatsoever, in law or
                 equity.





                                      -20-
<PAGE>   25
                          (ii)    "Environmental Claim" means any Claim
                 investigation or notice (written or oral) by any Person
                 alleging potential liability (including potential liability
                 for investigatory costs, cleanup costs, governmental response
                 costs, natural resources damages, property damages, personal
                 injuries or fatalities, or penalties) arising out of, based on
                 or resulting from (A) the presence, generation,
                 transportation, treatment, use, storage, disposal or Release
                 of Materials of Environment Concern or the threatened Release
                 of Materials of Environmental Concern at any location, or (B)
                 activities or conditions forming the basis of any violation,
                 or alleged violation of, or liability or alleged liability
                 under, any Environmental Law.

                          (iii)   "Environmental Laws" means federal, state,
                 local, provincial, municipal and foreign laws, ordinances,
                 principles of common law, rules, by-laws, orders, governmental
                 policies, statutes, regulations, agreements, treaties,
                 customary law, and international principles relating to the
                 pollution or protection of the environment or of flora or
                 fauna or their habitat or of human health and safety, or to
                 the cleanup or restoration of the environment, including, but
                 not limited to, any laws relating to (A) generation,
                 treatment, storage, disposal or transportation of wastes,
                 emissions or discharges or protection of the environment from
                 the same, (B) exposure of Persons to, or Release or threat of
                 Release of, Materials of Environmental Concern, (C) noise, (D)
                 repetitive motion, and (E) the safety and health of workers
                 and employees.

                          (iv)    "Materials of Environmental Concern" means
                 all chemicals, pollutants, contaminants, wastes, toxic
                 substances, petroleum or any fraction thereof, petroleum
                 products and hazardous substances (as defined in Section
                 101(14) of CERCLA, 42 U.S.C.  Section  6601(14)), or solid or
                 hazardous wastes as now defined and regulated under any
                 Environmental Laws.

                          (v)     "Release" means any release, spill, emission,
                 leaking, pumping, injection, deposit, disposal, discharge,
                 dispersal, leaching or migration.





                                      -21-
<PAGE>   26
                 Section 4.13     Employees and Benefit Plans. Buyer Sub,
Office Flex I and Office Flex II have, and have had since their respective
dates of formation, no employees.

                 Section 4.14     Labor Matters.  Except as described in
Schedule 4.14, neither of Buyer Sub, Office Flex I or Office Flex II is a party
to, or bound by, any collective bargaining agreement, contract or other
agreement or understanding with a labor union or labor union organization.
Except for the matters described in Schedule 4.14 (none of which matters would,
individually or in the aggregate, reasonably be expected to have a Material
Adverse Effect), there is no unfair labor practice or labor arbitration
proceeding pending or, to the knowledge of Buyer, threatened against Buyer Sub,
Office Flex I or Office Flex II.  To the knowledge of Buyer, there are no
organizational efforts with respect to the formation of a collective bargaining
unit presently being made or threatened involving employees of Buyer Sub,
Office Flex I or Office Flex II.

                 Section 4.15     Confirmation of Representations and
Warranties.  Buyer hereby confirms that each of the representations and
warranties contained in Sections 4.1 through 4.8 of the Purchase Agreement are
accurate as of the date of this Agreement and incorporates those
representations and warranties herein by reference for the benefit of the Trust
under this Agreement.

                 Section 4.16     Brokers and Finders.  No agent, broker,
investment banker or other Person, including any of the foregoing that is an
Affiliate of Buyer Sub, is or will be entitled to any broker's or finder's fee
or any other commission or similar fee from Buyer, Buyer Sub, Office Flex I or
Office Flex II or in connection with this Agreement or any of the transactions
contemplated hereby for which Buyer Sub, Office Flex I, Office Flex II or the
Trust will be responsible.  The Trust acknowledges that Buyer is obligated to
pay a fee to Chadwick & Saylor in connection with the transactions contemplated
hereby and by the Purchase Agreement.

                 Section 4.17     Affiliate Transactions.  Schedule 4.17 sets
forth a complete and accurate list of all agreements and transactions or
currently proposed agreements and transactions or series of agreements and
related transactions with an aggregate value in excess of $60,000 entered into
by Buyer and any of its Affiliates, other than Buyer Sub, on the one hand, and
Buyer Sub, Office Flex I or Office Flex II, on the other hand, since January 1,
1996.

                 Section 4.18     Knowledge Defined.  As used herein, the
phrase "to Buyer's knowledge" (or words of similar import) means the knowledge
of those individuals identified in Schedule 4.17, and includes any facts,
matters or circumstances set forth in any written notice to Buyer, Buyer Sub,
Office Flex I or Office Flex II from any Government Authority or any other
material notice received by Buyer, Buyer Sub, Office Flex I or Office Flex II
and





                                      -22-
<PAGE>   27
also includes any matter of which Buyer informs the Trust in writing.


                                   ARTICLE 5

                    REPRESENTATION AND WARRANTY OF THE TRUST

                 The Trust hereby represents and warrants to Buyer and Buyer
Sub as follows:

                 Section 5.1      Confirmation of Representations and
Warranties.  The Trust hereby confirms that each of the representations and
warranties contained in Sections 3.1 through 3.20 of the Purchase Agreement are
accurate as of the date of this Agreement and incorporates those
representations and warranties herein by reference for the benefit of Buyer and
the Buyer Sub under this Agreement.


                                   ARTICLE 6

                         JOINT COVENANT OF THE PARTIES

                 Section 6.1      Section 368(a) Reorganization.  The parties
hereto agree to consummate the Merger pursuant to Texas and Delaware state
laws, and to treat the Merger for Federal income tax purposes as a Merger
pursuant to Section 368(a) of the Code.  No party hereto shall take any action
on or after the date of the Merger that might preclude such treatment.  This
Section 6.1 shall survive until the second anniversary of the Effective Time.


                                   ARTICLE 7

                          CERTAIN ADDITIONAL COVENANTS

                 Section 7.1      Confirmation of Covenants.  Buyer agrees to
perform, and to cause Buyer Sub to perform, and the Trust agrees to perform,
each of the covenants contained in Sections 6.1 through 6.12 of the Purchase
Agreement which are incorporated by reference herein as if Buyer Sub were Buyer
for purposes of these Sections.

                 Section 7.2      Resale.  Buyer acknowledges and agrees that
the Merger Shares will not, as of the Closing Date, be registered under the
Securities Act or the securities laws of any state and that they may be sold or
otherwise disposed of only in one or more transactions registered under the
Securities Act and, where applicable, such state securities laws or as to which
an exemption from the registration requirements of the Securities Act and,
where applicable, such state securities laws is available.  Buyer acknowledges
and agrees that the Merger Shares





                                      -23-
<PAGE>   28
are subject to the standstill provision set forth in Section 6.11 of the
Purchase Agreement.

                 Section 7.3      Legends; Stop Transfer Orders.  (a)  The
certificates for the Merger Shares will bear legends in substantially the
following form:

                 THE SHARES REPRESENTED HEREBY HAVE BEEN ACQUIRED FOR
                 INVESTMENT AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES
                 ACT OF 1933, AS AMENDED, OR UNDER THE SECURITIES LAWS OF ANY
                 STATE AND, ACCORDINGLY, MAY BE OFFERED, SOLD, TRANSFERRED OR
                 PLEDGED ONLY IN A TRANSACTION WHICH IS REGISTERED UNDER SUCH
                 ACT AND UNDER SUCH LAWS OR IS EXEMPTED FROM SUCH REGISTRATION
                 REQUIREMENTS.

                 THE SHARES ARE SUBJECT TO A STANDSTILL PROVISION SET FORTH IN
                 SECTION 6.11 OF THAT CERTAIN SHARE PURCHASE AGREEMENT DATED
                 JULY 30, 1998, BY AND BETWEEN THE ISSUER AND DEVELOPERS
                 DIVERSIFIED REALTY CORPORATION.

The legend set forth in the first paragraph shall be removed from any such
certificate at the request of the holder thereof at such times as the shares
represented thereby are registered under the Securities Act or become eligible
for resale under Rule 144 promulgated under the Securities Act.  The legend set
forth in the second paragraph shall be removed upon expiration of the
Standstill Period.

                 (b)      The certificates for the Merger Shares may also bear
any legend required by any applicable state blue sky law.

                 (c)      Any certificates for the Merger Shares will also bear
a legend relating to restrictions on transfer imposed pursuant to the
percentage ownership limitation contained in the Trust Declaration.

                 (d)      The Trust may impose appropriate stop-transfer
instructions relating to the restrictions set forth herein.

                 Section 7.4      Post-Closing Delivery of Preferred Shares.
Within 30 days after the Closing, Buyer agrees to deliver certificates
representing the Preferred Shares, free and clear of all Liens, with all
necessary stock powers, letters of transmittal, share transfer and other
documentary stamps attached, in exchange for the payments described in Section
3.1.

                 Section 7.5      Reimbursement of Expenses.  Within 10 days
after the Closing, the Trust shall reimburse Buyer, by wire transfer of
immediately available funds, for all third-party expenses, except for the fees
of Baker & Hostetler LLP, incurred by Buyer in connection with this Agreement
and the transactions contemplated hereby.





                                      -24-
<PAGE>   29
                 Section 7.6      Liability of Buyer.  Buyer agrees that for
the purpose of determining liability for any breach of the representations and
warranties made under this Agreement, each of the representations and
warranties made by Buyer Sub, Office Flex I or Office Flex II shall be treated
as if such representations and warranties were made by Buyer.

                 Section 7.7      Title Insurance.  At the Closing or within 10
Business Days after the Closing, Buyer agrees to provide evidence reasonably
satisfactory to the Trust of payment for American Land Title Association owners
title policies with extended coverage insuring the fee simple title of the
Trust to each of Property in amounts having an aggregate value of at least
$19,506,408.


                                   ARTICLE 8

                   CLOSING DELIVERIES AND CLOSING CONDITIONS

                 Section 8.1      Closing Deliveries.

                 (a)      Buyer Deliveries.  At the Closing, Buyer shall
deliver, or cause to be delivered, to the Trust the following:

                          (i)    certificates representing the Nonvoting Common
                 Shares and Voting Common Shares, free and clear of all Liens,
                 with all necessary stock powers, letters of transmittal, share
                 transfer and other documentary stamps attached;

                          (ii)   the certificate, dated the Closing Date and
                 validly executed on behalf of Buyer and Buyer Sub, required by
                 Section 8.3(a);

                          (iii)  resolutions of the Board of Directors of Buyer
                 Sub, certified by the Secretary of Buyer Sub, authorizing the
                 execution and delivery of this Agreement and the transactions
                 contemplated hereby;

                          (iv)   evidence or copies of any consents, approvals,
                 orders, qualifications or waivers required on behalf of Buyer
                 or Buyer Sub by Section 8.3;

                          (v)    if not theretofore delivered to the Trust, all
                 other certificates, documents, instruments and writings
                 required pursuant to this Agreement to be delivered by or on
                 behalf of Buyer or Buyer Sub at or before the Closing;

                          (vi)   the Merger Certificate, validly executed on
                 behalf of Buyer Sub;

                          (vii)  each of the legal opinions of Buyer's counsel
                 required by Sections 8.3(c) and 8.3(d); and





                                      -25-
<PAGE>   30
                          (viii) such other instruments reasonably requested by
                 the Trust as may be necessary or appropriate to confirm or
                 carry out the provisions of this Agreement.

                 (b)      Trust Deliveries.  At the Closing, the Trust shall
deliver, or cause to be delivered, to Buyer the following:

                          (i)    certificates representing the number of
                 Merger Shares, bearing the legends described in Section 7.3,
                 issued to Buyer and Scott A. Wolstein, as appropriate, free
                 and clear of all Liens (unless created by Buyer or any of its
                 Affiliates), with all necessary stock powers, share transfer
                 and other documentary stamps attached;

                          (ii)   the certificate, dated the Closing Date and
                 validly executed on behalf of the Trust, required by Section
                 8.2(a);

                          (iii)  resolutions of the Board of Managers, certified
                 by the Secretary of the Trust, authorizing the execution and
                 delivery of this Agreement, the Purchase Agreement and the
                 Registration Rights Agreement, and the transactions
                 contemplated hereby and thereby, including the creation and
                 issuance of the Buyer Preferred Shares;

                          (iv)   resolutions of the Board of Directors of the
                 Trust, certified by the Secretary of the Trust, authorizing
                 the execution and delivery of this Agreement and the
                 transactions contemplated hereby;

                          (v)    the legal opinion of the Trust's counsel
                 required by Section 8.2(c);

                          (vi)   evidence or copies of any consents, approvals,
                 orders, qualifications or waivers required by Section 8.1;

                          (vii)  all other certificates and instruments and
                 documents required pursuant this Agreement to be delivered by
                 the Trust to Buyer at or prior to the  Closing;

                          (vii)  a supplemental listing application executed by
                 the Trust and the NYSE authorizing the listing of the Merger
                 Shares (subject to official notice of issuance); and

                          (viii) such other instruments reasonably requested by
                 Buyer as may be necessary or appropriate to confirm or carry
                 out the provisions of this Agreement.





                                      -26-
<PAGE>   31
                 Section 8.2      Conditions to Closing for Buyer and Buyer
Sub.  The obligations of Buyer and Buyer Sub to consummate the transactions
contemplated hereby at the Closing are subject to the satisfaction or waiver of
each of the following conditions precedent:

                 (a)      Representations and Warranties; Covenants.  The
representations and warranties that are not qualified as to materiality of the
Trust contained herein shall have been true and correct in all material
respects on and as of the date hereof, and shall be true and correct in all
material respects on and as of the Closing Date with the same effect as though
such representations and warranties had been made on and as of the Closing Date
(except for representations and warranties that speak as of a specific date or
time other than the Closing Date (which need only be materially true and
correct in all respects as of such date or time)), and the representations and
warranties already qualified with respect to materiality shall have been true
and correct in all respects at each such date without regard to the materiality
qualification contained in this Section 8.2(a).  The covenants and agreements
of the Trust to be performed on or before the Closing Date in accordance with
this Agreement shall have been duly performed in all material respects.  The
Trust shall have delivered to Buyer and Buyer Sub at the Closing a certificate
of an appropriate officer in form and substance satisfactory to Buyer dated the
Closing Date to such effect.

                 (b)      No Limitation.  There shall not be in effect any
order, decree or injunction of a court or agency of competent jurisdiction
which enjoins or prohibits consummation of the transactions contemplated hereby
and there shall be no pending Action which would reasonably be expected to have
a material adverse effect on the ability of Buyer and Buyer Sub to consummate
the transactions contemplated hereby or to acquire the Merger Shares.

                 (c)      Opinion of Counsel.  Buyer shall have received a
legal opinion from Liddell, Sapp, Zivley, Hill & LaBoon, L.L.P.,  counsel to
the Trust, dated the Closing Date concerning, among other things, the
organization, authority, capitalization, SEC filings, contractual
relationships, compliance with law and other legal matters of each of the
Trust, and confirming that all shares issued pursuant to this Agreement will be
validly issued, fully paid and nonassessable, in form and substance reasonably
satisfactory to Buyer.

                 (d)      Conditions and Deliveries Under the Purchase
Agreement.  Except for Section 8.1(b)(i) of the Purchase Agreement (related to
the consummation of the transactions contemplated hereby), each of the
conditions precedent to Buyer's obligations and each of the deliveries required
to be made at the Initial Closing under the Purchase Agreement shall have been
satisfied, waived or made, as applicable.





                                      -27-
<PAGE>   32
                 Section 8.3      Conditions to Closing for the Trust.  The
obligations of the Trust to consummate the transactions contemplated hereby at
the Closing are subject to the satisfaction or waiver of each of the following
conditions precedent:

                 (a)      Representations and Warranties; Covenants.  The
representations and warranties of Buyer and Buyer Sub contained herein that are
not otherwise qualified as to materiality shall have been true and correct in
all material respects on and as of the date hereof, and shall be true and
correct in all material respects on and as of the Closing Date with the same
effect as though such representations and warranties had been made on and as of
the Closing Date (except for representations and warranties that speak as of a
specific date or time other than the Closing Date (which need only be
materially true and correct in all respects as of such date or time)), and the
representations and warranties already qualified with respect to materiality
shall have been true and correct in all respects at each such date without
regard to the materiality qualification contained in this Section 8.3(a).  The
covenants and agreements of Buyer and Buyer Sub to be performed on or before
the Closing Date in accordance with this Agreement shall have been duly
performed in all material respects.  Buyer and Buyer Sub shall have delivered
to the Trust at the Closing a certificate of an appropriate officer in form and
substance reasonably satisfactory to the Trust dated the Closing Date to such
effect.

                 (b)      No Limitation.  There shall not be in effect any
order, decree or injunction of a court or agency of competent jurisdiction
which enjoins or prohibits consummation of the transactions contemplated hereby
and there shall be no pending Action which would reasonably be expected to have
a material adverse effect on the ability of the Trust to consummate the actions
contemplated hereby or to issue the Merger Shares.

                 (c)      Opinion of Counsel.  The Trust shall have received a
legal opinion from Baker & Hostetler LLP, counsel to Buyer and Buyer Sub, dated
the Closing Date,  concerning, among other things, the organization, authority,
capitalization, SEC filings, contractual relationships, compliance with law and
other legal matters of each of Buyer and Buyer Sub, in form and substance
reasonably satisfactory to the Trust.

                 (d)      Tax Opinion.  The Trust shall have received the
opinion of Baker & Hostetler LLP, counsel for Buyer, in form and substance
reasonably satisfactory to the Trust, and dated the Closing Date, that (i)
commencing with its initial taxable year that will end December 31, 1998, Buyer
Sub has met the requirements under the Code for qualification and taxation as a
real estate investment trust and that, after giving effect to the transactions
contemplated hereby, Buyer Sub's proposed method of operation will enable it to
continue to meet the requirements for qualification and taxation as a real
estate investment trust under the Code and (ii) each subsidiary of Buyer Sub
has been,





                                      -28-
<PAGE>   33
since its formation, and continues to be, treated for federal income tax
purposes (a) as a partnership, and not as a corporation or an association
taxable as a corporation or (b) as an entity disregarded as separate from its
owner (in the case of (i) and (ii) above with customary assumptions and
qualifications).

                 (e)      Conditions and Deliveries Under the Purchase
Agreement.  Each of the conditions precedent to the Trust's obligation and each
of the deliveries required to be made at the Closing under the Purchase
Agreement shall have been satisfied, waived or made, as applicable.



                                   ARTICLE 9

                           SURVIVAL; INDEMNIFICATION

                 Section 9.1      Survival.  All representations, warranties
and (except as provided in the last sentence of this Section 9.1) covenants and
agreements of the parties contained herein, including indemnity or
indemnification agreements contained herein, or in any Schedule or Exhibit
hereto, or any certificate, document or other instrument delivered in
connection herewith shall survive until the first anniversary of the Closing.
No Action or proceeding may be brought with respect to any of the
representations and warranties or any of the covenants or agreements which so
survive unless written notice thereof, setting forth in reasonable detail the
claimed misrepresentation or breach of warranty or breach of covenant or
agreement, shall have been delivered to the party alleged to have breached such
representation or warranty or such covenant or agreement on or prior to the
first anniversary of the Closing and the party alleged to have breached such
representation or warranty has not cured the alleged breach within 30 days
after the receipt of such notice.  Those covenants or agreements that
contemplate or may involve actions to be taken or obligations to be in effect
after the Closing shall survive in accordance with their terms, and any action
or proceeding with respect to any such covenant or agreement may be brought
until the statute of limitations applicable thereto expires.

                 Section 9.2      Indemnification by Buyer or the Trust.  (a)
Subject to Section 9.1, from and after the Closing Date, Buyer shall indemnify
and hold harmless the Trust, its successors and assigns, from and against any
and all damages, claims, losses, expenses, costs, obligations and liabilities,
including liabilities for all reasonable attorneys' fees and expenses
(including attorney and expert fees and expenses incurred to enforce the terms
of this Agreement) (collectively, "Loss and Expense") suffered, directly or
indirectly, by the Trust by reason of, or arising out of, (i) any breach as of
the date made or deemed made or required to be true of any representation or
warranty made by Buyer or Buyer Sub in or pursuant to this





                                      -29-
<PAGE>   34
Agreement and the failure to cure such breach within the applicable cure
period, or (ii) any failure by Buyer or Buyer Sub to perform or fulfill any of
its covenants or agreements set forth herein.

                 (b)      Subject to Section 9.1, from and after the Closing
Date, the Trust shall indemnify and hold harmless Buyer, its successors and
assigns, from and against any and all Loss and Expense, suffered, directly or
indirectly, by Buyer by reason of, or arising out of, (i) any breach as of the
date made or deemed made or required to be true of any representation or
warranty made by the Trust in or pursuant to this Agreement or in any
certificate delivered pursuant to this Agreement and the failure to cure such
breach within the applicable cure period, or (ii) any failure by the Trust to
perform or fulfill any of its covenants or agreements set forth herein.

                 (c)      Notwithstanding the foregoing, neither Buyer nor the
Trust shall be responsible for any Loss and Expense as provided in paragraphs
(a) and (b), respectively, of this Section 9.2, until the cumulative aggregate
amount of such Loss and Expense suffered by Buyer and Buyer Sub, on one hand,
or the Trust, on the other hand, as the case may be, exceeds $50,000, in which
case Buyer or the Trust, as the case may be, shall then be liable for all such
Loss and Expense.  Except with respect to third-party claims being defended in
good faith or claims for indemnification with respect to which there exists a
good faith dispute, the indemnifying party shall satisfy its obligations
hereunder within 30 days of receipt of a notice of claim under this Article 9.
The liability of Buyer or the Trust, as applicable, under this Article 9 and
Article 9 of the Purchase Agreement, collectively, shall not exceed
$58,000,000.

                 Section 9.3      Third-Party Claims.  If a claim by a third
party is made against a party and if such party intends to seek indemnity with
respect thereto under this Article 9, such party (the "Indemnified Party")
shall promptly notify the indemnifying party in writing of such claim setting
forth such claim in reasonable detail.  The indemnifying party shall have 20
days after receipt of such notice to undertake, through counsel of its own
choosing and at its own expense, the settlement or defense thereof, and the
Indemnified Party shall cooperate with it in connection therewith, but the
Indemnified Party may participate in such settlement or defense through counsel
chosen by such Indemnified Party, so long as the fees and expenses of such
counsel are borne by that Indemnified Party.  The Indemnified Party shall not
pay or settle any claim which the indemnifying party is contesting.
Notwithstanding the foregoing, the Indemnified Party shall have the right to
pay or settle any such claim, but in such event it shall waive any right to
indemnity therefor by the indemnifying party.  If the indemnifying party does
not notify the Indemnified Party within 20 days after the receipt of the
Indemnified Party's notice of a claim of indemnity hereunder that it elects to
undertake the defense thereof, the Indemnified Party shall have the right to





                                      -30-
<PAGE>   35
contest or compromise the claim and no such contesting or compromise will
constitute a waiver of any right to indemnity therefor pursuant to this
Agreement.


                                   ARTICLE 10

                                  TERMINATION

                 Section 10.1     Termination.  This Agreement may be
terminated at any time prior to the Closing in accordance with the terms and
conditions of Article 10 of the Purchase Agreement which are incorporated by
reference herein and shall be given effect as if Buyer Sub were Buyer for
purposes of that Article.

                 Section 10.2     Procedure and Effect of Termination.  In the
event of termination of this Agreement by the Trust or Buyer pursuant to
Section 10.1, written notice thereof shall forthwith be given by the
terminating party to the other party hereto, and this Agreement shall thereupon
be and become void and have no effect, and the transactions contemplated hereby
shall be abandoned without further action by the parties hereto, except that
the provisions of Sections 6.1, as it relates to the Section 5.2 of the
Purchase Agreement (Public Announcements), 11.4 (Notices) and, the provisions
of Article 10 of the Purchase Agreement, as such provisions apply to this
Agreement, shall survive the termination of this Agreement, and no termination
of this Agreement shall relieve any party hereto of any liability for any
breach of this Agreement.  In addition, the Confidentiality Agreements executed
by each of the parties hereto prior to the date hereof shall survive any
termination of this Agreement in accordance with their terms.


                                   ARTICLE 11

                                 MISCELLANEOUS

                 Section 11.1     Counterparts.  This Agreement may be executed
in one or more counterparts, all of which shall be considered one and the same
agreement, and shall become effective when one or more counterparts have been
signed by each party hereto and delivered to the other party.  Copies of
executed counterparts transmitted by telecopy, telefax or other electronic
transmission service shall be considered original executed counterparts for
purposes of this Section, provided receipt of copies of such counterparts is
confirmed.

                 Section 11.2     Governing Law.  THIS AGREEMENT SHALL BE
GOVERNED BY AND CONSTRUED IN ACCORDANCE THE LAWS OF THE STATE OF TEXAS WITHOUT
REFERENCE TO THE CHOICE OF LAW PRINCIPLES THEREOF.

                 Section 11.3     Jurisdiction.  Each party to this Agreement
hereby irrevocably agrees that any legal action or proceeding





                                      -31-
<PAGE>   36
arising out of or relating to this Agreement or any agreements or transactions
contemplated hereby may be brought only in a federal district court of the
United States of America and hereby expressly submits to the personal
jurisdiction and venue of any such court of proper jurisdiction for the
purposes thereof and expressly waives any claim of improper venue and any claim
that such court is an inconvenient forum.  TO THE EXTENT NOT PROHIBITED BY
APPLICABLE LAW WHICH CANNOT BE WAIVED, EACH PARTY HEREBY WAIVES, AND COVENANTS
THAT IT WILL NOT ASSERT (WHETHER AS PLAINTIFF, DEFENDANT OR OTHERWISE), ANY
RIGHT TO TRIAL BY JURY IN ANY FORUM IN RESPECT OF ANY ISSUE, CLAIM, DEMAND,
ACTION, OR CAUSE OF ACTION ARISING OUT OF OR BASED UPON THIS AGREEMENT OR THE
SUBJECT MATTER HEREOF, IN EACH CASE WHETHER NOW EXISTING OR HEREAFTER ARISING
OR WHETHER IN CONTRACT OR TORT OR OTHERWISE.

                 Section 11.4     Entire Agreement.  This Agreement (including
the agreements incorporated herein) and the Schedules and Exhibits hereto
contain the entire agreement between the parties with respect to the subject
matter hereof and there are no agreements, understandings, representations or
warranties between the parties other than those set forth or referred to
herein.  This Agreement is not intended to confer upon any Person not a party
hereto (and their successors and assigns) any rights or remedies hereunder.

                 Section 11.5     Notices.  All notices and other
communications hereunder shall be sufficiently given for all purposes hereunder
if in writing and delivered personally, sent by documented overnight delivery
service or, to the extent receipt is confirmed, telecopy, telefax or other
electronic transmission service to the appropriate address or number as set
forth below, unless and until either of such parties notifies the other in
accordance with this section of a change of address or change of telecopy
number:

                 If to Buyer or Buyer Sub:

                           Developers Diversified Realty Corporation
                           34555 Chagrin Blvd.
                           Moreland Hills, Ohio 44022
                           Attention: Scott A. Wolstein
                           Telecopy Number: (440) 247-0434

                 with a copy to:

                           Baker & Hostetler LLP
                           3200 National City Center
                           1900 East 9th Street
                           Cleveland, Ohio 44114-3485
                           Attention: Albert T. Adams
                           Telecopy Number: (216) 696-0740





                                      -32-
<PAGE>   37
                 If to the Trust:

                           American Industrial Properties REIT
                           6210 North Beltline, Suite 170
                           Irving, Texas 75063
                           Attention: Charles W. Wolcott
                           Telecopy Number: (972) 756-0704

                 with a copy to:

                           Liddell, Sapp, Zivley, Hill & LaBoon, L.L.P.
                           2001 Ross Avenue, Suite 3000
                           Dallas, Texas 75201
                           Attention: Bryan L. Goolsby
                           Telecopy Number: (214) 849-5599

                 Section 11.6     Successors and Assigns.  This Agreement shall
be binding upon and inure to the benefit of the parties hereto and their
respective successors and permitted assigns, but neither this Agreement nor any
of the rights, interests or obligations hereunder may be assigned by either of
the parties hereto without the prior written consent of the other party.

                 Section 11.7     Amendments and Waivers.  This Agreement may
not be modified or amended except by an instrument in writing signed by the
party against whom enforcement of any such modification or amendment is sought.
Either party hereto may, only by an instrument in writing, waive compliance by
the other party hereto with any term or provision hereof on the part of such
other party hereto to be performed or complied with.  The waiver by any party
hereto of a breach of any term or provision hereof shall not be construed as a
waiver of any subsequent breach thereof.

                 Section 11.8     Interpretation; Absence of Presumption.  (a)
For the purposes hereof, (i) words in the singular shall be held to include the
plural and vice versa and words of one gender shall be held to include the
other gender as the context requires, (ii) the terms "hereof," "herein," and
"herewith" and words of similar import shall, unless otherwise stated, be
construed to refer to this Agreement as a whole (including all of the Schedules
and Exhibits hereto) and not to any particular provision of this Agreement, and
Article, Section, paragraph, Exhibit and Schedule references are to the
Articles, Sections, paragraphs, Exhibits and Schedules to this Agreement unless
otherwise specified, (iii) the word "including" and words of similar import
when used in this Agreement shall mean "including, without limitation," unless
otherwise specified, and (iv) the word "or" shall not be exclusive.

                 (b)      This Agreement will be construed without regard to
any presumption or rule requiring construction or interpretation against the
party drafting or causing any instrument to be drafted.





                                      -33-
<PAGE>   38
                 Section 11.9     Severability.  Any provision hereof which is
invalid or unenforceable shall be ineffective to the extent of such invalidity
or unenforceability then such invalid or unenforceable provision shall be
revised by a court of competent jurisdiction to make that provision valid or
enforceable.

                 Section 11.10    Further Assurances.  The Trust and Buyer agree
that, from time to time, whether before, at or after the Closing Date, each of
them will execute and deliver such further instruments and take such other
actions as may be necessary to carry out the purposes and intents hereof.

                 Section 11.11    Specific Performance.  Buyer, Buyer Sub and
the Trust each acknowledge that, in view of the uniqueness of the Merger Shares
and the properties to be acquired by the Trust pursuant to the Merger
Agreement, the parties hereto would not have an adequate remedy at law for
money damages if this Agreement were not performed in accordance with its
terms, and therefore agree that the parties hereto shall be entitled to
specific enforcement of the terms hereof in addition to any other remedy to
which the parties hereto be entitled at law or in equity.





                                      -34-
<PAGE>   39
                 IN WITNESS WHEREOF, this Agreement has been signed by or on
behalf of each of the parties hereto as of the date first above written.

                                        BUYER:

                                        DEVELOPERS DIVERSIFIED REALTY
                                        CORPORATION, an Ohio corporation
                                        
                                        
                                        
                                        By: /s/ Scott A. Wolstein
                                            ---------------------------------
                                        Name: Scott A. Wolstein
                                              -------------------------------
                                        Title: President
                                               ------------------------------
                                        
                                        
                                        BUYER SUB:
                                        
                                        DDR OFFICE FLEX CORPORATION,
                                        a Delaware corporation
                                        
                                        
                                        
                                        By: /s/ Scott A. Wolstein
                                            ---------------------------------
                                        Name: Scott A. Wolstein
                                              -------------------------------
                                        Title: President
                                               ------------------------------
                                        
                                        
                                        THE TRUST:
                                        
                                        AMERICAN INDUSTRIAL PROPERTIES
                                        REIT, a Texas real estate
                                        Investment trust
                                        
                                        
                                        
                                        By: /s/ Charles W. Wolcott
                                            ---------------------------------
                                        Name: Charles W. Wolcott
                                              -------------------------------
                                        Title: President & CEO
                                               ------------------------------

<PAGE>   1
                                                                     EXHIBIT 3.1




                            STATEMENT OF DESIGNATION
                                       OF
                     SERIES A CONVERTIBLE PREFERRED SHARES
                                       OF
                              BENEFICIAL INTEREST
                                       OF
                      AMERICAN INDUSTRIAL PROPERTIES REIT

                                  ARTICLE ONE

         AMERICAN INDUSTRIAL PROPERTIES REIT (the "Trust"), pursuant to the
provisions of Section 3.30 of the Texas Real Estate Investment Trust Act (the
"TREITA"), hereby files this Statement of Designation of Series A Convertible
Preferred Shares of Beneficial Interest of the Trust (the "Statement") prior to
the issuance of any shares of Series A Convertible Preferred Shares of
Beneficial Interest, such series of unissued shares having been established by
a resolution duly adopted by all necessary action on the part of the Trust and
the Board of Trust Managers, as provided for in the Third Amended and Restated
Declaration of Trust, as amended (the "Declaration of Trust").

                                  ARTICLE TWO

         The name of the Trust is American Industrial Properties REIT.

                                 ARTICLE THREE

         Pursuant to the authority conferred upon the Board of Trust Managers
by the Declaration of Trust and Section 3.30 of the TREITA, the Board of Trust
Managers, pursuant to Section 10.20 of the TREITA, adopted a resolution
establishing the Series A Preferred Shares of Beneficial Interest of the Trust
and designating the series and fixing and determining the preferences,
limitations, and relative rights thereof, as set forth in the true and correct
copy of the resolution attached hereto as Exhibit A (the "Designating
Resolution").

                                  ARTICLE FOUR

         The Designating Resolution was adopted effective as of July 29, 1998.

                                  ARTICLE FIVE

         The Designating Resolution was duly adopted by all necessary action on
the part of the Trust.
<PAGE>   2
         IN WITNESS WHEREOF, the undersigned officer has executed this
Statement effective as of July 30, 1998.


                               AMERICAN INDUSTRIAL PROPERTIES REIT
                               
                               
                               
                               By:       /s/ Charles W. Wolcott                
                                        ---------------------------------------
                                        Charles W. Wolcott
                                        President and Chief Executive Officer
                               
                               
                               /s/ Joan A. Rose                                
                               ------------------------------------------------
                               Notary Public, State of Texas
                               
                               
                               Joan A. Rose                                    
                               ------------------------------------------------
                               Printed Name of Notary:
                               
                               My Commission Expires:
                               
                               
                               April 1, 2000                                   
                               ------------------------------------------------


STATE OF TEXAS            )
                          )
COUNTY OF DALLAS          )



                 The foregoing instrument was acknowledged before me this 30th
day of July, 1998, by Charles W. Wolcott, President and Chief Executive Officer
of American Industrial Properties REIT, a Texas real estate investment trust,
on behalf of said corporation.


                               /s/ Joan A. Rose                                
                               ------------------------------------------------
                               Notary Public, State of Texas
                               
                               
                               Joan A. Rose                                    
                               ------------------------------------------------
                               Printed Name of Notary:
                               
                               My Commission Expires:
                               
                               
                               April 1, 2000                                   
                               ------------------------------------------------



                                      2
<PAGE>   3
                                   EXHIBIT A

                             DESIGNATING RESOLUTION
                            BOARD OF TRUST MANAGERS
                      AMERICAN INDUSTRIAL PROPERTIES REIT
                                 JULY 29, 1998


AUTHORIZATION OF SERIES A CONVERTIBLE PREFERRED SHARES OF BENEFICIAL INTEREST

         WHEREAS, the Board of Trust Managers of American Industrial Properties
REIT (the "Trust") has deemed it to be in the best interest of the Trust and
its shareholders for the Trust to establish a series of preferred shares
pursuant to the authority granted to the Board of Trust Managers in the Third
Amended and Restated Declaration of Trust, as amended (the "Declaration of
Trust"), of the Trust:

         NOW, THEREFORE, BE IT RESOLVED, that, pursuant to the authority vested
in the Board of Trust Managers by the Declaration of Trust, a series of
preferred shares is hereby established, and the terms of the same shall be as
follows:

         Section 1.       Number of Shares and Designation.  This series of
Preferred Shares of Beneficial Interest shall be designated as Series A
Convertible Preferred Shares of Beneficial Interest (the "Series A Preferred
Shares") and up to 14,285,715 shall be the number of such Preferred Shares of
Beneficial Interest constituting such series.

         Section 2.       Definitions.  For purposes of the Series A Preferred
Shares, the following terms shall have the meanings indicated:

         "Act" shall mean the Securities Act of 1933, as amended.

         "Trust Managers" shall mean the Trust Managers of the Trust or any
         committee authorized by such Trust Managers to perform any of its
         responsibilities with respect to the Series A Preferred Shares.

         "Common Shares" shall mean Common Shares of Beneficial Interest, $.10
         par value per share, of the Trust or such shares of the Trust's
         capital shares into which such Common Shares of Beneficial Interest
         shall be reclassified.

         "Conversion Rate" shall mean the conversion rate, as adjusted pursuant
         to paragraph (d) of Section 6.  The initial Conversion Rate shall be
         one Common Share for each Series A Preferred Share.

         "Current Market Price" of publicly traded Common Shares or any other
         class or series of capital shares or other security of the Trust or of
         any similar security of any other issuer for





                                       1
<PAGE>   4
         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 regular way on such day, 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 National Market of
         the National Association of Securities Dealers, Inc. Automated
         Quotations System ("NASDAQ") or, if such security is not quoted on
         such 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 or the Trust Managers or if any class or series of
         securities are not publicly traded, the fair value of the shares of
         such class as determined reasonably and in good faith by the Trust
         Managers.

         "Declaration of Trust" shall mean the Third Amended and Restated
         Declaration of Trust, as amended, of the Trust.

         "Funds Available for Distribution" shall mean funds from operations
         (net income, computed in accordance with generally accepted accounting
         principles excluding gains or losses from debt restructuring and sales
         of property, plus depreciation and amortization) minus non-revenue
         generating capital expenditures and debt principal amortization, as
         determined by the Trust Managers on a basis consistent with the
         policies and practices adopted by the Trust for reporting publicly its
         results of operations and financial condition.

         "Issue Date" shall mean the actual date of issuance of any Series A 
         Preferred Shares.

         "Junior Shares" shall mean the Common Shares and any other class or
         series of capital shares of the Trust over which the Series A
         Preferred Shares have preference or priority in the payment of
         dividends or in the distribution of assets on any liquidation,
         dissolution or winding up of the Trust.

         "Parity Shares" shall have the meaning set forth in paragraph (b) of 
         Section 7 hereof.

         "Person" shall mean any individual, firm, partnership, corporation or
         other entity and shall include any successor (by merger or otherwise)
         of such entity.

         "Series A Preferred Shares" shall have the meaning set forth in 
         Section 1 hereof.

         "Standstill Period" shall have the meaning set forth in that certain
         Share Purchase Agreement dated July 30, 1998,  by and between the
         Trust and Developers Diversified Realty Corporation.





                                       2
<PAGE>   5
         "Trading Day", as to any Common Shares, shall mean any day on which
         such Common Shares are traded on the NYSE or, if such Common Shares
         are not listed or admitted for trading on the NYSE, on the principal
         national securities exchange on which such Common Shares are listed or
         admitted or, if such Common Shares are not listed or admitted for
         trading on any national securities exchange, on the National Market of
         NASDAQ or, if such Common Shares are not quoted on such National
         Market, in the Common Shares market in which such Common Shares are
         traded.

         "Transaction" shall have the meaning set forth in paragraph (e) of 
         Section 6 hereof.

         "Transfer Agent" means Boston EquiServe, Bank of Boston (or its
         affiliates) or any U.S. bank with aggregate capital, surplus and
         undivided profits, as shown on its last published report, of at least
         $30,000,000 as may be designated by the Trust Managers or their
         designee as the transfer agent for the Series A Preferred Shares.

         "Voting Preferred Shares" shall have the meaning set forth in
         paragraph (b) of Section 8 hereof.

         Section 3.       Dividends.   The holders of each Series A Preferred
Share shall be entitled to receive dividends and distributions in an amount
equal to the amount of dividends and distributions paid on each Common Share,
when, as and if declared by the Board of Trust Managers of the Trust.

         Section 4.       Liquidation Preference.

                 (a)      In the event of any liquidation, dissolution or
winding up of the Trust, whether voluntary or involuntary, before any payment
or distribution of the assets of the Trust (whether capital or surplus) shall
be made to or set apart for the holders of Junior Shares, the holders of Series
A Preferred Shares shall be entitled to receive $0.001 per Series A Preferred
Share plus an amount equal to all accrued and unpaid dividends thereon to the
date fixed for distribution; but such holders shall not be entitled to any
further payment.  Until the holders of the Series A Preferred Shares have been
paid the liquidation preference in full, no payment will be made to any holder
of Junior Shares upon the liquidation, dissolution or winding up of the Trust.
If, upon any liquidation, dissolution or winding up of the Trust, the assets of
the Trust, or proceeds thereof, distributable among the holders of Series A
Preferred Shares shall be insufficient to pay in full the preferential amount
aforesaid and liquidating payments on any other shares of any class or series
of Parity Shares, then such assets, or the proceeds thereof, shall be
distributed among the holders of Series A Preferred Shares and any such other
Parity Shares ratably in the same proportion as the respective amounts that
would be payable on such Series A Preferred Shares and any such other Parity
Shares if all amounts payable thereon were paid in full.  For the purposes of
this Section 4, (i) a consolidation or merger of the Trust with one or more
corporations, (ii) a sale or transfer of all or substantially all of the
Trust's assets, or (iii) a statutory share exchange shall not be deemed to be a
liquidation, dissolution or winding up, voluntary or involuntary, of the Trust.







                                       3
<PAGE>   6
                 (b)      Subject to the rights of the holders of any Parity
Shares, upon any liquidation, dissolution or winding up of the Trust, after 
payment shall have been made in full to the holders of Series A Preferred
Shares and any Parity Shares, as provided in this Section 4, any other series
or class or classes of Junior Shares shall, subject to the respective terms
thereof, be entitled to receive any and all assets remaining to be paid or
distributed, and the holders of the Series A Preferred Shares and any Parity
Shares shall not be entitled to share therein.

         Section 5.       Shares To Be Retired.  All Series A Preferred Shares
which shall have been issued and reacquired in any manner by the Trust shall be
restored to the status of authorized, but unissued Preferred Shares, without
designation as to series.  The Trust may also retire any unissued Series A
Preferred Shares, and such shares shall then be restored to the status of
authorized but unissued Preferred Shares, without designation as to series.

         Section 6.       Conversion.

         Holders of Series A Preferred Shares shall have the right to convert
all or a portion of such shares into Common Shares, as follows:

                 (a)      Subject to and upon compliance with the provisions of
this Section 6, a holder of Series A Preferred Shares shall have the right, at
such holder's option, at any time after the end of the Standstill Period to
convert such shares, in whole or in part, into the number of fully paid and
nonassessable shares of authorized but previously unissued Common Shares
obtained by multiplying the Conversion Rate (as in effect at the time and on
the date provided for in the last clause of paragraph (b) of this Section 6) by
the number of Series A Preferred Shares to be converted by surrendering such
shares to be converted, such surrender to be made in the manner provided in
paragraph (b) of this Section 6.

                 (b)      In order to exercise the conversion right, the holder
of each Series A Preferred Share to be converted shall surrender the
certificate representing such shares, duly endorsed or assigned to the Trust or
in blank, at the office of the Transfer Agent, accompanied by written notice to
the Trust that the holder thereof elects to convert such Series A Preferred
Shares.  Unless the shares issuable on conversion are to be issued in the same
name as the name in which such Series A Preferred Shares are registered, each
share surrendered for conversion shall be accompanied by instruments of
transfer, in form satisfactory to the Trust, duly executed by the holder or
such holder's duly authorized attorney and an amount sufficient to pay any
transfer or similar tax (or evidence reasonably satisfactory to the Trust
demonstrating that such taxes have been paid).

         As promptly as practicable after the surrender of certificates for
Series A Preferred Shares as aforesaid, the Trust shall issue and shall deliver
at such office to such holder, or send on such holder's written order, a
certificate or certificates for the number of full Common Shares issuable upon
the conversion of such Series A Preferred Shares in accordance with provisions
of this Section 6, and any fractional interest in respect of a Common Share
arising upon such conversion shall be settled as provided in paragraph (c) of
this Section 6.





                                       4
<PAGE>   7
         Each conversion shall be deemed to have been effected immediately
prior to the close of business on the date on which the certificates for Series
A Preferred Shares shall have been surrendered and such notice received by the
Trust as aforesaid, and the person or persons in whose name or names any
certificate or certificates for Common Shares shall be issuable upon such
conversion shall be deemed to have become the holder or holders of record of
the shares represented thereby at such time on such date and such conversion
shall be at the Conversion Rate in effect at such time on such date unless the
share transfer books of the Trust shall be closed on that date, in which event
such person or persons shall be deemed to have become such holder or holders of
record at the close of business on the next succeeding day on which such
transfer books are open, but such conversion shall be at the Conversion Rate in
effect on the date on which such shares shall have been surrendered and such
notice received by the Trust.

                 (c)      No fractional Common Share or scrip representing
fractions of a Common Share shall be issued upon conversion of the Series A
Preferred Shares.  Instead of any fractional interest in a Common Share that
would otherwise be deliverable upon the conversion of Series A Preferred
Shares, the Trust shall pay to the holder of such share an amount in cash based
upon the Current Market Price of the Common Shares on the Trading Day
immediately preceding the date of conversion.  If more than one share shall be
surrendered for conversion at one time by the same holder, the number of full
Common Shares issuable upon conversion thereof shall be computed on the basis
of the aggregate number of Series A Preferred Shares so surrendered.

                 (d)      The Conversion Rate shall be adjusted from time to
time as follows:

                          (i)     If the Trust shall after the Issue Date (A)
         subdivide its outstanding Common Shares into a greater number of
         shares, (B) combine its outstanding Common Shares into a smaller
         number of shares, or (C) issue any capital shares by reclassification
         of its Common Shares, the Conversion Rate in effect 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 A Preferred Share
         thereafter surrendered for conversion shall be entitled to receive the
         number of Common Shares (or fraction of a Common Share) 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 A
         Preferred Share been converted immediately prior to the effective date
         of the  subdivision, combination or reclassification.  An adjustment
         made pursuant to this paragraph (d)(i) of this Section 6 shall become
         effective immediately after the opening of business on the day next
         following the effective date of the subdivision, combination or
         reclassification.

                          (ii)    No adjustment in the Conversion Rate shall be
         required unless such adjustment would require a cumulative increase or
         decrease of at least 1% in such rate; provided, however, that any
         adjustments that by reason of this paragraph (d)(ii) are not required
         to be made shall be carried forward and taken into account in any
         subsequent adjustment until made.  Notwithstanding any other
         provisions of this Section 6, the Trust shall not be required to make
         any adjustment of the Conversion Rate for the issuance of any Common
         Shares pursuant to any plan providing for the reinvestment of
         dividends or interest payable on securities of the Trust and the
         investment of additional optional amounts in





                                       5
<PAGE>   8
         Common Shares under such plan.  Anything in this paragraph (d) of this
         Section 6 to the contrary notwithstanding, the Trust shall be
         entitled, to the extent permitted by law, to make such adjustments in
         the Conversion Rate, in addition to those required by this paragraph
         (d), as the Trust in its discretion shall determine to be advisable in
         order that any share dividends, subdivision of shares,
         reclassification or combination of shares, distribution of rights or
         warrants to purchase shares or securities, or a distribution of other
         assets (other than cash dividends) hereafter made by the Trust to its
         shareholders shall not be taxable, or if that is not possible, to
         diminish any income taxes that are otherwise payable because of such
         event.

                 (e)      If the Trust shall be a party to any transaction
(including without limitation a merger, consolidation, statutory share
exchange, issuer or self tender offer for all or a substantial portion of the
Common Shares outstanding, sale of all or substantially all of the Trust's
assets or recapitalization of the Common Shares, but excluding any transaction
as to which paragraph (d)(i) of this Section 6 applies) (each of the foregoing
being referred to herein as a "Transaction"), in each case as a result of which
Common Shares shall be converted into the right to receive shares, securities
or other property (including cash or any combination thereof), each Series A
Preferred Share which is not converted into the right to receive shares,
securities or other property in connection with such Transaction shall
thereupon be convertible into the kind and amount of shares, securities and
other property (including cash or any combination thereof) receivable upon such
consummation by a holder of that number of Common Shares into which one Series
A Preferred Share was convertible immediately prior to such Transaction.  The
Trust shall not be a party to any Transaction unless the terms of such
Transaction are consistent with the provisions of this paragraph (e), and it
shall not consent or agree to the occurrence of any Transaction until the Trust
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 Shares
that will contain provisions enabling the holders of the Series A Preferred
Shares that remain outstanding after such Transaction to convert into the
consideration received by holders of Common Shares at the Conversion Rate in
effect immediately prior to such Transaction.  The provisions of this paragraph
(e) shall similarly apply to successive Transactions.

                 (f)      If:

                          (i)     there shall be any reclassification of the
         Common Shares or any consolidation or merger to which the Trust is a
         party and for which approval of any shareholders of the Trust is
         required, or a statutory share exchange, or an issuer or self tender
         offer by the Trust for all or a substantial portion of its outstanding
         Common Shares (or an amendment thereto changing the maximum number of
         shares sought or the amount or type of consideration being offered
         therefor) or the sale or transfer of all or substantially all of the
         assets of the Trust as an entirety; or

                          (ii)    there shall occur the voluntary or
         involuntary liquidation, dissolution or winding up of the Trust,





                                       6
<PAGE>   9
then the Trust shall cause to be filed with the Transfer Agent and shall cause
to be mailed to each holder of Series A Preferred Shares at such holder's
address as shown on the records of the Trust, as promptly as possible, but at
least 15 days prior to the applicable date hereinafter specified, a notice
stating (A) the date on which such reclassification, consolidation, merger,
statutory 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 Shares of record shall be entitled to exchange their
Common Shares for securities or other property, if any, deliverable upon such
reclassification, consolidation, merger, statutory share exchange, sale,
transfer, liquidation, dissolution or winding up or (B) the date on which such
tender offer commenced, the date on which such tender offer is scheduled to
expire unless extended, the consideration offered and the other material terms
thereof (or the material terms of any amendment thereto).  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 6.

                 (g)      Whenever the Conversion Rate is adjusted as herein
provided, the Trust shall promptly file with the Transfer Agent an officer's
certificate setting forth the Conversion Rate after such adjustment 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 delivery of such certificate, the Trust
shall prepare a notice of such adjustment of the Conversion Rate setting forth
the adjusted Conversion Rate and the effective date such adjustment becomes
effective and shall mail such notice of such adjustment of the Conversion Rate
to each holder of Series A Preferred Shares at such holder's last address as
shown on the share records of the Trust.

                 (h)      In any case in which paragraph (d) of this Section 6
provides that an adjustment shall become effective on the day next following
the record date for an event, the Trust may defer until the occurrence of such
event (A) issuing to the holder of any Series A Preferred Share converted after
such record date and before the occurrence of such event the additional Common
Shares issuable upon such conversion by reason of the adjustment required by
such event over and above the Common Shares issuable upon such conversion
before giving effect to such adjustment and (B) paying to such holder any
amount of cash in lieu of any fraction pursuant to paragraph (c) of this
Section 6.

                 (i)      There shall be no adjustment of the Conversion Rate
in case of the issuance of any capital shares of the Trust in a reorganization,
acquisition or other similar transaction except as specifically set forth in
this Section 6.  If any action or transaction would require adjustment of the
Conversion Rate pursuant to more than one paragraph of this Section 6, only one
adjustment shall be made and such adjustment shall be the amount of adjustment
that has the highest absolute value.

                 (j)      If the Trust shall take any action affecting the
Common Shares, other than  an action described in this Section 6, that in the
opinion of the Trust Managers would materially adversely affect the conversion
rights of the holders of Series A Preferred Shares, the Conversion Rate for the
Series A Preferred Shares may be adjusted, to the extent permitted by law, in
such manner, if any, and at such time as the Board of Trust Managers, in its
sole discretion, may determine to be equitable under the circumstances.





                                       7
<PAGE>   10
                 (k)      The Trust shall at all times reserve and keep
available, free from preemptive rights, out of the aggregate of its authorized
but unissued Common Shares solely for the purpose of effecting conversion of
the Series A Preferred Shares, the full number of Common Shares deliverable
upon the conversion of all outstanding Series A Preferred Shares not
theretofore converted into Common Shares.  For purposes of this paragraph (k),
the number of Common Shares that shall be deliverable upon the conversion of
all outstanding Series A Preferred Shares shall be computed as if at the time
of computation all such outstanding shares were held by a single holder.

         The Trust covenants that any Common Shares issued upon conversion of
the Series A Preferred Shares shall be validly issued, fully paid and
non-assessable.

         The Trust shall use its commercially reasonable efforts to list the
Common Shares required to be delivered upon conversion of the Series A
Preferred Shares, prior to such delivery, upon each national securities
exchange, if any, upon which the outstanding Common Shares are listed at the
time of such delivery.

                 (l)      The Trust will pay any and all documentary stamp or
similar issue or transfer taxes payable in respect of the issue or delivery of
Common Shares or other securities or property on conversion of Series A
Preferred Shares  pursuant hereto; provided, however, that the Trust shall not
be required to pay any tax that may be payable in respect of any transfer
involved in the issue or delivery of Common Shares or other securities or
property in a name other than that of the holder of the Series A Preferred
Shares to be converted, and no such issue or delivery shall be made unless and
until the person requesting such issue or delivery has paid to the Trust the
amount of any such tax or established, to the reasonable satisfaction of the
Trust, that such tax has been paid.

         Section 7.       Ranking.  Any class or series of capital shares of
the Trust shall be deemed to rank:

                 (a)      prior or senior to the Series A Preferred Shares, as
to the payment of dividends and as to distribution of assets upon liquidation,
dissolution or winding up, if the holders of such class or series shall be
entitled to the 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 Series A Preferred Shares;

                 (b)      on a parity with the Series A Preferred Shares, as to
the payment of dividends and as to distribution of assets upon liquidation,
dissolution or winding up, whether or not the dividend rates, dividend payment
dates or redemption or liquidation prices per share thereof be different from
those of the Series A Preferred Shares, if the holders of such class of Shares
or series and the Series A Preferred Shares 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 dividends
per share or liquidation preferences, without preference or priority one over
the other ("Parity Shares"); and





                                       8
<PAGE>   11
                 (c)      junior to the Series A Preferred Shares, as to the
payment of dividends or as to the distribution of assets upon liquidation,
dissolution or winding up, if such Shares or series shall be Common Shares or
if the holders of Series A Preferred Shares 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 ("Junior Shares").

         Section 8.       Voting.

                 (a)      Except as otherwise provided in Section 8(b) below,
the holders of Series A Preferred Shares shall have no right to vote on any
matter to be voted on by the shareholders of the Trust (including, without
limitation, any election or removal of a Trust Manager), and the Series A
Preferred Shares shall not be included in the number of shares voting or
entitled to vote on such matters.

                 (b)      So long as any Series A Preferred Shares are
outstanding, in addition to any other vote or consent of shareholders required
by law or by the Declaration of Trust, the affirmative vote of at least 66 2/3%
of the votes entitled to be cast by the holders of the Series A Preferred
Shares, together with the holders of every other series of Parity Shares (any
such other series, the "Voting Preferred Shares"), at the time outstanding,
acting as a single class regardless of series, given in person or by proxy,
either in writing without a meeting or by vote at any meeting called for the
purpose, shall be necessary for effecting or validating any amendment,
alteration or repeal of any of the provisions of this Statement of Designation,
the Declaration of Trust or the Bylaws of the Trust that materially adversely
affects the voting powers, rights or preferences of the holders of the Series A
Preferred Shares or the Voting Preferred Shares; provided, however, that the
amendment of the provisions of the Declaration of Trust so as to authorize or
create, or to increase the authorized amount of, any Junior Shares or any
shares of any class ranking prior to or on a parity with the Series A Preferred
Shares or the Voting Preferred Shares shall not be deemed to materially
adversely affect the voting powers, rights or preferences of the holders of
Series A Preferred Shares.

         Section 10.      Record Holders.  The Trust and the Transfer Agent may
deem and treat the record holder of any Series A Preferred Share as the true
and lawful owner thereof for all purposes, and neither the Trust nor the
Transfer Agent shall be affected by any notice to the contrary.

Ratification and Authorization

         RESOLVED, that any and all acts and deeds of any officer or Trust
Manager taken prior to the date hereof on behalf of the Trust with regard to
the foregoing resolutions are hereby approved, ratified and confirmed in all
respects as and for the acts and deeds of the Trust.

         FURTHER RESOLVED, that the officers of the Trust be, and each of them
hereby is, severally and without the necessity for joinder of any other person,
authorized, empowered and directed to execute and deliver any and all such
further documents and instruments and to do and perform any and all such
further acts and deeds that may be necessary or advisable to effectuate and
carry out the purposes and intents of the foregoing resolutions, including, but
not limited to, the filing of a statement with the County Clerk of Dallas
County, Texas, setting forth the designations,





                                       9
<PAGE>   12
preferences, limitations and rights of Series A Preferred Shares pursuant to
Section 3.30 of TREITA, all such actions to be performed in such manner, and
all such documents and instruments to be executed and delivered in such form,
as the officer performing or executing the same shall approve, the performance
or execution thereof by such officer to be conclusive evidence of the approval
thereof by such officer and by the Board of Trust Managers.





                                       10

<PAGE>   1
                                                                    EXHIBIT 10.1





- --------------------------------------------------------------------------------


                            SHARE PURCHASE AGREEMENT

                                    between

                      AMERICAN INDUSTRIAL PROPERTIES REIT

                                      and

                   DEVELOPERS DIVERSIFIED REALTY CORPORATION

                                  dated as of

                                 July 30, 1998


- --------------------------------------------------------------------------------
<PAGE>   2
                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                                     Page
                                                                                                                     ----

<S>                                                                                                                    <C>
ARTICLE 1        DEFINITIONS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   1

ARTICLE 2        PURCHASE AND SALE OF SHARES; CLOSING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   9
         Section 2.1      Purchase and Sale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   9
         Section 2.2      Consideration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   9
         Section 2.3      Closings  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   9

ARTICLE 3        REPRESENTATIONS AND WARRANTIES OF THE TRUST  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  10
         Section 3.1      Organization and Qualification; Subsidiaries  . . . . . . . . . . . . . . . . . . . . . . .  10
         Section 3.2      Authority Relative to Agreements; Board Approval  . . . . . . . . . . . . . . . . . . . . .  11
         Section 3.3      Capital Stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
         Section 3.4      No Conflicts; No Defaults; Required Filings and Consents  . . . . . . . . . . . . . . . . .  12
         Section 3.5      SEC Matters and Absence of Undisclosed Liabilities  . . . . . . . . . . . . . . . . . . . .  13
         Section 3.6      Litigation; Compliance With Law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  14
         Section 3.7      Absence of Certain Changes or Events  . . . . . . . . . . . . . . . . . . . . . . . . . . .  14
         Section 3.8      Tax Matters; REIT & Partnership Status  . . . . . . . . . . . . . . . . . . . . . . . . . .  15
         Section 3.9      Compliance with Agreements  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  17
         Section 3.10     Financial Records; Trust Declaration and By-Laws; Corporate Records . . . . . . . . . . . .  19
         Section 3.11     Properties  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  19
         Section 3.12     Environmental Matters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
         Section 3.13     Employees and Benefit Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  28
         Section 3.14     Labor Matters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  30
         Section 3.15     Affiliate Transactions  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  30
         Section 3.16     Insurance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  30
         Section 3.17     Proxy Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
         Section 3.18     Takeover Statutes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
         Section 3.19     Brokers and Finders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
         Section 3.20     Knowledge Defined . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31

ARTICLE 4        REPRESENTATIONS AND WARRANTIES OF BUYER  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
         Section 4.1      Organization  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
         Section 4.2      Due Authorization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  32
         Section 4.3      Conflicting Agreements and Other Matters  . . . . . . . . . . . . . . . . . . . . . . . . .  32
         Section 4.4      Acquisition for Investment; Sophistication  . . . . . . . . . . . . . . . . . . . . . . . .  32
         Section 4.5      Proxy Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  32
         Section 4.6      Brokers or Finders  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33
         Section 4.7      REIT Qualification Matters  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33
         Section 4.8      Investment  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33
         Section 4.9      Legends; Stop-Transfer Orders.  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33

ARTICLE 5        COVENANTS RELATING TO THE CLOSINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34
         Section 5.1      Taking of Necessary Action  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34
         Section 5.2      Public Announcement; Confidentiality  . . . . . . . . . . . . . . . . . . . . . . . . . . .  35
         Section 5.3      Conduct of Business . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  36
</TABLE>





                                      -i-
<PAGE>   3
<TABLE>
<S>                                                                                                                    <C>
         Section 5.4      No Solicitation of Transactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  36
         Section 5.5      Notification of Certain Matters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  37
         Section 5.6      Provision of Certain Documents  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  37
         Section 5.7      Registration Rights Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  38
         Section 5.8      Merger Agreement.   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  38
         Section 5.9      Compensation of Chairman of the Board . . . . . . . . . . . . . . . . . . . . . . . . . . .  38

ARTICLE 6        CERTAIN ADDITIONAL COVENANTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  38
         Section 6.1      Resale  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  38
         Section 6.2      REIT Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  38
         Section 6.3      Board Representation; Chairmanship; Visitation Rights; Voting Agreements  . . . . . . . . .  38
         Section 6.4      Listing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  40
         Section 6.5      Acknowledgment  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  40
         Section 6.6      Additional Purchased Shares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  40
         Section 6.7      Anti-Dilution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  41
         Section 6.8      No Repurchase Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  42
         Section 6.9      Excess Securities Provision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  42
         Section 6.10     Disinterested Managers  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  42
         Section 6.11     Standstill  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  42
         Section 6.12     Funding Prior to Second Closing.    . . . . . . . . . . . . . . . . . . . . . . . . . . . .  43

ARTICLE 7        CLOSING DELIVERIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  44
         Section 7.1      Initial Closing Deliveries  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  44
         Section 7.2      Second Closing Deliveries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  46
         Section 7.3      Additional Closings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  47

ARTICLE 8        CONDITIONS TO CLOSINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  49
         Section 8.1      Conditions to Purchase at Initial Closing . . . . . . . . . . . . . . . . . . . . . . . . .  49
         Section 8.2      Conditions of Sale at Initial Closing . . . . . . . . . . . . . . . . . . . . . . . . . . .  50
         Section 8.3      Conditions to Purchase at Second Closing  . . . . . . . . . . . . . . . . . . . . . . . . .  52
         Section 8.4      Conditions of Sale  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  52
         Section 8.5      Conditions to Purchase at each Additional Closing . . . . . . . . . . . . . . . . . . . . .  53
         Section 8.6      Conditions to Sale at each Additional Closing . . . . . . . . . . . . . . . . . . . . . . .  53

ARTICLE 9        SURVIVAL; INDEMNIFICATION  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  54
         Section 9.1      Survival  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  54
         Section 9.2      Indemnification by Buyer or the Trust . . . . . . . . . . . . . . . . . . . . . . . . . . .  54
         Section 9.3      Third-Party Claims  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  55

ARTICLE 10 TERMINATION  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  56
         Section 10.1     Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  56
         Section 10.2     Procedure and Effect of Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . .  56
         Section 10.3     Expenses; Breakup Fee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  57
         Section 10.4     Repurchase Obligation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  58

ARTICLE 11 MISCELLANEOUS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  58
         Section 11.1     Counterparts  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  58
         Section 11.2     Governing Law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  58
         Section 11.3     Jurisdiction  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  58
         Section 11.4     Entire Agreement  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  59
</TABLE>





                                      -ii-
<PAGE>   4
<TABLE>
         <S>              <C>                                                                                          <C>
         Section 11.5     Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  59
         Section 11.6     Successors and Assigns  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  59
         Section 11.7     Amendments and Waivers  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  60
         Section 11.8     Interpretation; Absence of Presumption  . . . . . . . . . . . . . . . . . . . . . . . . . .  60
         Section 11.9     Severability  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  60
         Section 11.10    Further Assurances  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  60
         Section 11.11    Specific Performance  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  60
</TABLE>





                                     -iii-
<PAGE>   5
                                   SCHEDULES

<TABLE>
<S>                               <C>
Schedule 3.1(d)                   Subsidiaries
Schedule 3.3(a)                   Partnership Units
Schedule 3.3(b)                   Options Under Option Plans
Schedule 3.3(c)                   Options, Warrants, Etc.
Schedule 3.4(b)                   Breaches, Defaults or Accelerations of Vesting
Schedule 3.4(d)                   Defaults
Schedule 3.6(a)                   Litigation; Compliance with Law
Schedule 3.7                      Absence of Certain Changes or Events
Schedule 3.8(a)                   Tax Matters
Schedule 3.8(c)                   Section 280G Matters
Schedule 3.8(d)                   Section 162(m) Matters
Schedule 3.9(c)                   Indebtedness; Joint Venture and Partnership Agreements
Schedule 3.9(d)                   Development, Construction, Management and Leasing Arrangements
Schedule 3.9(e)                   Other Material Agreements
Schedule 3.9(f)                   Conflict Policies & Agreements; Waivers
Schedule 3.10(b)                  Corporate Records
Schedule 3.11(a)                  Trust Properties
Schedule 3.11(b)                  Trust Property Violations/Engineering Reports
Schedule 3.11(c)                  Trust Property Road Changes
Schedule 3.11(f)                  Material Trust Lease Information
Schedule 3.11(g)                  Trust Property Letters of Intent or Similar Understandings
Schedule 3.11(h)                  Trust Property Rights of First Refusal
Schedule 3.11(i)                  Trust Property Noncompliance and Capital Expenditure Budget and Schedule
Schedule 3.11(j)                  Developed, Undeveloped, or Rehabilitated Land of Trust Property
Schedule 3.11(l)                  Trust Tenancy Leases
Schedule 3.12(a)                  Environmental Permits
Schedule 3.12(e)                  Environmental Concerns
Schedule 3.12(f)                  Environmental Reports
Schedule 3.13(a)                  Employment Agreements
Schedule 3.13(b)                  Employee Benefit Plans
Schedule 3.13(g)                  COBRA Participants
Schedule 3.13(k)                  Payments to Employees
Schedule 3.14                     Collective Bargaining; Labor Union Agreements
Schedule 3.15                     Affirmative Transactions
Schedule 3.20                     Individuals for Knowledge Test
Schedule 6.12                     Property Acquisitions for Funding Option
</TABLE>





                                      -iv-
<PAGE>   6
                                    EXHIBIT

<TABLE>
<S>                                                <C>
Exhibit A                                          Trust Declaration
Exhibit B                                          Terms of Buyer Preferred Shares
Exhibit C                                          Registration Rights Agreement
Exhibit D                                          Form of Promissory Note
</TABLE>





                                      -v-
<PAGE>   7
                 THIS SHARE PURCHASE AGREEMENT (the "Agreement"), dated as of
July 30, 1998, is made between American Industrial Properties REIT, a Texas
real estate investment trust (the "Trust"), and Developers Diversified Realty
Corporation, an Ohio corporation ("Buyer").

                                   RECITALS:

                 WHEREAS, Buyer wishes to purchase from the Trust, and the
Trust wishes to sell to Buyer, an aggregate of 6,175,730 of the Trust's common
shares of beneficial interest, par value $0.10 per share ("Trust Common
Shares"), having the terms set forth in the Third Amended and Restated
Declaration of Trust attached as Exhibit A (the "Trust Declaration"), in
exchange for the Initial Purchase Price and the Remaining Purchase Price, each
as defined herein; and

                 WHEREAS, Buyer and the Trust are entering into this Agreement
to provide for such purchase and sale and to establish various rights and
obligations in connection with this Agreement and the Merger Agreement, as
defined herein;

                 NOW, THEREFORE, in consideration of the premises and the
representations, warranties, covenants and agreements contained herein, and for
other good and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged, and intending to be legally bound hereby, the parties
hereto hereby agree as follows:

                                   ARTICLE 1

                                  DEFINITIONS

                 As used in this Agreement, the following terms have the
following respective meanings:

                 "Action" means any actual or threatened action, suit,
arbitration, inquiry, proceeding or investigation by or before any Government
Authority.

                 "ADA" has the meaning set forth in Section 3.11(e).

                 "Additional Closing Date" has the meaning set forth in Section
2.3(c).

                 "Additional Purchase Option" has the meaning set forth in
Section 6.6(a).

                 "Additional Purchased Shares" has the meaning set forth in
Section 6.6(a).

                 "Affiliate" has the meaning ascribed thereto in Rule 12b-2
promulgated under the Exchange Act, as in effect on the date hereof.





                                      -1-
<PAGE>   8
                 "Agreement" has the meaning set forth in the first paragraph
hereof.

                 "Benefit Arrangements" has the meaning set forth in Section
3.13(h).

                 "Beneficial Ownership" has the meaning set forth in Rule 13d-3
promulgated under the Exchange Act.

                 "Blue Sky Laws" has the meaning set forth in Section 3.4(e).

                 "Board of Managers" means the Board of Trust Managers of the
Trust.

                 "Breakup Fee" has the meaning set forth in Section 10.3(c).

                 "Business Day" means any day other than a Saturday, a Sunday
or a bank holiday in Cleveland, Ohio or Dallas, Texas.

                 "Buyer" has the meaning set forth in the first paragraph
hereof.

                 "Buyer Preferred Shares" means a class of preferred shares of
the Trust to be created by the Board of Managers on or prior to the date hereof
having the terms set forth in Exhibit B hereto.

                 "Buyer Representatives" has the meaning set forth in Section
6.3(a).

                 "Buyer Shares" means, at any time, the Initial Purchased
Shares and the Remaining Shares then issued and outstanding pursuant to this
Agreement, as adjusted for any share split, subdivision, combination, merger,
reclassification or share dividend related to the Trust Common Shares occurring
at or before that time.

                 "CERCLA" has the meaning set forth in Section 3.12(e).

                 "Claim" has the meaning set forth in Section 3.12(g)(i).

                 "Closing" has the meaning set forth in Section 2.3.

                 "Code" means the Internal Revenue Code of 1986, as  amended,
and any successor thereto, including all of the rules and regulations
promulgated thereunder.

                 "Commitment" has the meaning set forth in Section 3.7.

                 "Competing Transaction" means (i) any acquisition in any
manner, directly or indirectly (including through any option, right to acquire
or other Beneficial Ownership), of more than 10%





                                      -2-
<PAGE>   9
of any class of equity securities of the Trust or any Subsidiary or assets
representing a material portion of the assets of the Trust or any Subsidiary,
(ii) any merger, consolidation, sale of assets, share exchange,
recapitalization, other business combination, liquidation, or other action out
of the ordinary course of business of the Trust, or (iii) any public
announcement of a proposal, plan or intention to do any of the foregoing or any
agreement to engage in any of the foregoing.

                 "Controlled Group Liability" has the meaning set forth in
Section 3.13(h).

                 "Debt Instruments" means all notes, mortgages, deeds of  trust
or similar instruments which evidence or secure any indebtedness payable to the
Trust or any Subsidiary.

                 "Development Properties" has the meaning set forth in Section
3.11(j).

                 "Development Budget and Schedule"  has the meaning set forth
in Section 3.11(j).

                 "Disinterested Managers" has the meaning set forth in Section
6.11.

                 "Employee Benefit Plan" has the meaning set forth in Section
3.13(h).

                 "Employees" has the meaning set forth in Section 3.13(h).

                 "Environmental Claim" has the meaning set forth in Section
3.12(g)(ii).

                 "Environmental Laws" has the meaning set forth in Section
3.12(g)(iii).

                 "Environmental Permits" has the meaning set forth in Section
3.12(a).

                 "ERISA" means the Employee Income Security Act of 1974, as
amended, and any successor thereto.

                 "ERISA Affiliate" means, with respect to any entity, trade or
business, any other entity, trade or business that is a member of a group
described in Section 414(b), (c), (m) or (o) of the Code or Section 4001(b)(1)
of ERISA that includes the first entity, trade or business, or that is a member
of the same "controlled group" as the first entity, trade or business within
the meaning of Section 4001(a)(14) of ERISA.

                 "Exercise Date Trailing Average" has the meaning set forth in
Section 6.6(c).





                                      -3-
<PAGE>   10
                 "Exchange Act" has the meaning set forth in Section 3.4(e).

                 "Executive Summaries of the Trust Environmental Reports" has
the meaning set forth in Section 3.12(f).

                 "Forty Percent Threshold" has the meaning set forth in Section
6.7(a).

                 "GAAP" has the meaning set forth in Section 3.5(b).

                 "Government Authority" means any government or state (or any
subdivision thereof) of or in the United States, or any agency, authority,
bureau, commission, department or similar body or instrumentality thereof, or
any governmental court or tribunal.

                 "HSR Act" has the meaning set forth in Section 3.4(e).

                 "Indemnified Party" has the meaning set forth in Section 9.2.

                 "Initial Closing" has the meaning set forth in Section 2.2.

                 "Initial Closing Date" has the meaning set forth in Section
2.1(a).

                 "Initial Purchase Price" means $14,711,778.50.

                 "Initial Shares" has the meaning set forth in Section 2.1(a).

                 "Insurance Policies" has the meaning set forth in Section
3.16.

                 "IRS" means the Internal Revenue Service.

                 "Liabilities" means, as to any Person, all debts, adverse
claims, liabilities and obligations, direct, indirect, absolute or contingent
of such Person, whether accrued, vested or otherwise, whether in contract,
tort, strict liability or otherwise and whether or not actually reflected, or
required by GAAP to be reflected, in such Person's balance sheets or other
books and records, including (i) obligations arising from noncompliance with
any law, rule or regulation of any Government Authority or imposed by any court
or any arbitrator of any kind, (ii) all indebtedness or liability of such
Person for borrowed money, or for the purchase price of property or services
(including trade obligations), (iii) all obligations of such Person as lessee
under leases, capital or other, (iv) liabilities of such Person in respect of
plans covered by Title IV of ERISA, or otherwise arising in respect of plans
for employees or former employees or their respective families or
beneficiaries, (v) reimbursement obligations of such Person in respect of
letters of





                                      -4-
<PAGE>   11
credit, (vi) all obligations of such Person arising under acceptance
facilities, (vii) all liabilities of other Persons or entities, directly or
indirectly, guaranteed, endorsed (other than for collection or deposit in the
ordinary course of business) or discounted with recourse by such Person or with
respect to which such Person is otherwise directly or indirectly liable, (viii)
all obligations secured by any Lien on property of such Person, whether or not
the obligations have been assumed, and (ix) all other items which have been, or
in accordance with GAAP would be, included in determining total liabilities on
the liability side of such Person's balance sheet.

                 "Liens" means all liens, mortgages, deeds of trust, deeds to
secure debt, security interests, pledges, claims, charges, easements and other
encumbrances of any nature whatsoever.

                 "Loss and Expense" has the meaning set forth in Section
9.2(a).

                 "Manager" means a member of the Board of Managers.

                 "Material Adverse Effect" means a material adverse effect on
the financial condition, results of operations, business or prospects of the
Trust and its Subsidiaries (to the extent of the Trust's interests therein),
taken as a whole.

                 "Material Buyer Leases" has the meaning set forth in Section
4.9(f).

                 "Material Transaction" means any transaction between Buyer and
its Affiliates, on the one hand, and the Trust and its Affiliates, on the other
hand.

                 "Material Trust Leases" has the meaning set forth in Section
3.11(f).

                 "Materials of Environmental Concern" has the meaning set forth
in Section 3.12(g)(iv).

                 "Merger Agreement" means the Merger Agreement of even date
herewith among the Trust, Buyer and DDR Office Flex Corporation, a Delaware
corporation.

                 "Merger Shares" has the meaning set forth in Section 2.1.

                 "NYSE" means the New York Stock Exchange, Inc.

                 "Notice of Superior Proposal" has the meaning set forth in
Section 5.4.

                 "Other Filings" has the meaning set forth in Section 5.1(b).





                                      -5-
<PAGE>   12
                 "Partnership Units" has the meaning set forth in Section
3.3(a).

                 "Pension Plans" has the meaning set forth in Section 3.13(h).

                 "Person" means any individual, corporation, partnership,
limited liability company, joint venture, trust, unincorporated organization,
other form of business or legal entity or Government Authority.

                 "Project" has the meaning set forth in Section 3.11(j).

                 "Property Restrictions" has the meaning set forth in Section
3.11(a).

                 "Proxy Statement" has the meaning set forth in Section 5.1(b).

                 "Purchase Price" has the meaning set forth in Section 2.2.

                 "Purchased Shares" has the meaning set forth in Section 2.1.

                 "Qualified REIT Subsidiary" has the meaning set forth in
Section 3.8(i).

                 "Realco" has the meaning set forth in Section 3.15.

                 "Registration Rights Agreement" means an agreement in
substantially the same form as the agreement attached hereto as Exhibit C.

                 "Regulatory Filings" has the meaning set forth in Section
3.4(e).

                 "REIT" has the meaning set forth in Section 3.8(b).

                 "Release" has the meaning set forth in Section 3.12(g)(v).

                 "Remaining Purchase Price" means $81,012,036.50.

                 "Remaining Shares" has the meaning set forth in Section
2.1(b).

                 "SEC" has the meaning set forth in Section 3.5(a).

                 "Second Closing" has the meaning set forth in Section 2.2.

                 "Second Closing Date" has the meaning set forth in Section
2.3(b).





                                      -6-
<PAGE>   13
                 "Securities Act" has the meaning set forth in Section 3.4(c).

                 "Securities Laws" has the meaning set forth in Section 3.5(a).

                 "Standstill Period" has the meaning set forth in Section 6.11.

                 "Subsidiary" means each entity of which the Trust is the
direct or indirect general partner or as to which the Trust, directly or
through one or more intermediary entities, has the right to elect a majority of
the board of directors or other governing body or as to which the Trust has the
right to receive 50% or more of the economic value of any business or activity
in which such entity is engaged.

                 "Superior Proposal" means any bona fide written proposal for a
Competing Transaction that the Board of Managers determines in good faith
(after consultation with a financial adviser of nationally-recognized
reputation and the Trust's outside legal counsel) will provide greater
aggregate value to the Trust or the Trust's shareholders than the transaction
contemplated by this Agreement (and with a greater aggregate value than any
alternative transaction proposed by Buyer in accordance with Section 5.4).

                 "Tax" means any federal, state, local, or foreign income,
gross receipts, license, payroll, employment, excise, severance, stamp,
occupation, premium, windfall profits, environmental (including taxes under
Code Section 54A), customs duties, capital stock, profits, withholding, social
security (or similar), unemployment, disability, real property, personal
property, sales, use, transfer, registration, value added, alternative or
add-on minimum, estimated, or other tax of any kind whatsoever, including any
interest, penalty, or addition thereto, whether disputed or not.  The term
"Tax" also includes any amount payable pursuant to any tax sharing agreement
pursuant to which any relevant party is liable and any amount payable pursuant
to any similar contract.

                 "Tax Return" means any return, declaration, report, claim for
refund, or information return or statement relating to Taxes, including any
schedule or attachment thereto, and including any amendment thereof.

                 "Threshold Amount" has the meaning set forth in Section
6.6(b).

                 "Trust" has the meaning set forth in the first paragraph
hereof.

                 "Trust Abstracts" has the meaning set forth in Section
3.11(f).





                                      -7-
<PAGE>   14
                 "Trust Capital Expenditure Budget and Schedule" has the
meaning set forth in Section 3.11(i).

                 "Trust Common Shares" has the meaning set forth in the second
paragraph hereof.

                 "Trust Declaration" means the Third Amended and Restated
Declaration of Trust of the Trust attached hereto as Exhibit A.

                 "Trust Environmental Reports" has the meaning set forth in
Section 3.12(f).

                 "Trust Leases" has the meaning set forth in Section 3.11(f).

                 "Trust Permitted Liens" means (i) Liens (other than Liens
imposed under ERISA or any Environmental Law or in connection with any
Environmental Claim) for taxes or other assessments or charges of Governmental
Authorities that are not yet delinquent or that are being contested in good
faith by appropriate proceedings in each case, and with respect to which
adequate reserves or other appropriate provisions are being maintained by the
Trust or its Subsidiaries to the extent required by GAAP, (ii) statutory Liens
of landlords, carriers, warehousemen, mechanics, materialmen and other Liens
(other than Liens imposed under ERISA or any Environmental Law or in connection
with any Environmental Claim) imposed by law and created in the ordinary course
of business for amounts not yet overdue or which are being contested in good
faith by appropriate proceedings, and in each case with respect to which
adequate reserves or other appropriate provisions are being maintained by the
Trust or its Subsidiaries to the extent required by GAAP and which do not
exceed $25,000 in the aggregate, (iii) the Trust Leases, (iv) easements,
rights-of-way and covenant restrictions which are customary and typical for
properties similar to the Trust Properties and which do not (x) interfere
materially with the ordinary conduct of any Trust Property or the business of
the Trust and its Subsidiaries as a whole or (y) detract materially from the
value or usefulness of the Trust Property to which they apply, (v) the Liens
which were granted by the Trust or any of its Subsidiaries to lenders pursuant
to credit agreements in existence on the date hereof which are described in
Schedule 3.9(c), and (vi) such imperfections of title and encumbrances, if any,
as would not individually or in the aggregate reasonably be expected to result
in a Material Adverse Effect.

                 "Trust Plans" has the meaning set forth in Section 3.13(b).

                 "Trust Property" has the meaning set forth in Section 3.11(a).

                 "Trust Reports" has the meaning set forth in Section 3.5(a).





                                      -8-
<PAGE>   15
                 "Trust Rent Roll" has the meaning set forth in Section
3.11(f).

                 "Trust Tenancy Leases" has the meaning set forth in Section
3.11(l).

                 "Welfare Plans" has the meaning set forth in Section 3.13(h).


                                   ARTICLE 2

                      PURCHASE AND SALE OF SHARES; CLOSING

                 Section 2.1      Purchase and Sale.  On the terms and subject
to the conditions hereof: (a) at the Initial Closing, the Trust will issue and
deliver to Buyer 949,147 Trust Common Shares (the "Initial Shares"); and (b) at
the Second Closing, the Trust will issue and deliver to Buyer 5,226,583 Trust
Common Shares (the "Remaining Shares," and, together with the Initial Shares,
the Additional Purchased Shares (to the extent any are issued) and the Trust
Common Shares issued pursuant to the Merger Agreement (the "Merger Shares"),
the "Purchased Shares").  Any Additional Purchased Shares will be issued and
delivered on the terms and subject to the conditions described in this
Agreement, and the Merger Shares will be issued and delivered on the terms, and
subject to the conditions described in the Merger Agreement.

                 Section 2.2      Consideration.  On the terms and subject to
the conditions hereof, at the closing of the purchase of the Initial Shares
(the "Initial Closing"), Buyer shall deliver the Initial Purchase Price, in
immediately available funds, in exchange for the Initial Shares, and at the
closing of the purchase of the Remaining Shares (the "Second Closing"), Buyer
shall deliver the Remaining Purchase Price, in immediately available funds, in
exchange for the Remaining Shares.

                 Section 2.3      Closings.

                 (a)      Initial Closing.  The Initial Closing shall take
place at 10:00 a.m., local time, at the offices of Liddell, Sapp, Zivley, Hill
& LaBoon, L.L.P., 2001 Ross Avenue, Suite 3000, Dallas, Texas 75201, on the
Business Day following the satisfaction or waiver of the last to be satisfied
or waived of the conditions set forth in Sections 8.1 and 8.2 (other than those
conditions that are to be satisfied concurrently with the Initial Closing), or
on such other date or at such other time and place as the parties shall agree
on in writing (the "Initial Closing Date").

                 (b)      Second Closing.  The Second Closing shall take place
at 10:00 a.m., local time, at the offices of Liddell, Sapp, Zivley, Hill &
LaBoon, L.L.P., 2001 Ross Avenue, Suite 3000, Dallas, Texas 75201, on the
Business Day following the satisfaction or waiver of the last to be satisfied
or waived of





                                      -9-
<PAGE>   16
the conditions set forth in Sections 8.3 and 8.4 (other than those conditions
that are to be satisfied concurrently with the Second Closing), or on such
other date or at such other time and place as the parties shall agree on in
writing (the "Second Closing Date").

                 (c)      Additional Closings.  Any closing of any purchase of
Additional Purchased Shares (each, an "Additional Closing," and each of the
Initial Closing and the Second Closing and each Additional Closing, a
"Closing") shall take place at 10:00 a.m., local time, at the offices of
Liddell, Sapp, Zivley, Hill & LaBoon, L.L.P., 2001 Ross Avenue, Suite 3000,
Dallas, Texas 75201, on the Business Day following the satisfaction or waiver
of the last to be satisfied or waived of the agreements and conditions set
forth in Sections 6.6, 8.5 and 8.6 (other than those conditions that are to be
satisfied concurrently with that Additional Closing), or on such other date or
at such other time and place as the parties shall agree on in writing (each
date of an Additional Closing, an "Additional Closing Date").


                                   ARTICLE 3

                  REPRESENTATIONS AND WARRANTIES OF THE TRUST

                 The Trust hereby represents and warrants to Buyer as follows:

                 Section 3.1      Organization and Qualification; Subsidiaries.
(a) The Trust is a real estate investment trust duly organized and validly
existing under the laws of the State of Texas. The Trust has all requisite
power and authority to own, operate, lease and encumber its properties and
carry on its business as now conducted, and to enter into this Agreement and to
perform its obligations hereunder.

                 (b)      Each Subsidiary of the Trust is a corporation,
partnership or limited liability company duly organized, validly existing and
in good standing under the laws of the jurisdiction of its incorporation or
organization, and has the corporate, partnership or limited liability company
power and authority, as applicable, to own its properties and carry on its
business as it is now being conducted.

                 (c)      The Trust and each of its Subsidiaries is duly
qualified to do business and to the extent legally applicable is in good
standing in such jurisdictions in which the ownership of its property or the
conduct of its business requires such qualification, except for any
jurisdiction in which any failure to be so qualified or to be in good standing
would not, individually or in the aggregate, reasonably be expected to result
in a Material Adverse Effect.

                 (d)      Schedule 3.1(d) sets forth the name of each
Subsidiary (whether owned directly or indirectly through one or





                                      -10-
<PAGE>   17
more intermediaries).  All of the outstanding shares of capital stock of, or
other equity interests in, each of the Subsidiaries  are duly authorized,
validly issued, fully paid and nonassessable, and are owned, directly or
indirectly, by the Trust free and clear of all Liens, except as set forth in
Schedule 3.1(d).  The following information for each Subsidiary is set forth in
Schedule 3.1(d), if applicable: (i) its name and jurisdiction of incorporation
or organization; (ii) the type of and percentage interest held by the Trust in
the Subsidiary and the names of and percentage interest held by the other
interest holders, if any, in the Subsidiary; and (iii) any loans from the Trust
to, or payments payable to the Trust from, the Subsidiary, and the rate of
interest thereon.

                 Section 3.2      Authority Relative to Agreements; Board
Approval.  (a) The execution, delivery and performance of this Agreement and of
all of the documents and instruments delivered in connection herewith by the
Trust are within the power of the Trust.  This Agreement is, and the other
documents and instruments required hereby will be, when executed and delivered
by the Trust, the valid and binding obligations of the Trust, enforceable
against the Trust in accordance with their respective terms subject only to
bankruptcy, insolvency, reorganization, moratorium or similar laws at the time
in effect affecting the enforceability or right of creditors generally and to
general equitable principles which may limit the right to obtain equitable
remedies.

                 (b)      The Board of Managers has approved this Agreement and
the Merger Agreement and the transactions contemplated hereby and thereby and
has determined to recommend that the shareholders of the Trust vote in favor of
and approve the issuance of the Purchased Shares pursuant to this Agreement and
the Merger Agreement.

                 (c)      The Purchased Shares to be issued pursuant to this
Agreement and the Merger Agreement have been duly authorized, and upon issuance
on the terms set forth in this Agreement and the Merger Agreement will be duly
and validly issued, fully paid and nonassessable.  Upon consummation of the
transactions contemplated by this Agreement and the Merger Agreement, Buyer
will have good title to the Purchased Shares issued pursuant to this Agreement
and the Merger Agreement, free and clear of all Liens.

                 (d)      The sale of the Purchased Shares pursuant to this
Agreement and the Merger Agreement will not give any shareholder of the Trust
the right to demand payment for that shareholder's shares under the law of the
State of Texas, but may give them such rights under the Trust Declaration.

                 Section 3.3      Capital Stock. (a) The authorized capital
stock of the Trust on the date hereof consists of 500,000,000 Trust Common
Shares, and 50,000,000 preferred shares of beneficial interest, $.10 par value.
As of the date hereof,





                                      -11-
<PAGE>   18
there are 11,093,594 Trust Common Shares issued and outstanding, and no
preferred shares issued and outstanding.  All such issued and outstanding Trust
Common Shares are duly authorized, validly issued, fully paid, nonassessable
and free of preemptive rights. The Trust has no outstanding bonds, debentures,
notes or other obligations the holders of which have the right to vote (or
which are convertible into or exercisable for securities the holders of which
have the right to vote) with the shareholders of the Trust on any matter.
Other than (i) the limited partnership units ("Partnership Units") described in
Schedule 3.3(a) of this Agreement which may be put to the Trust by the holders
thereof for Trust Common Shares or the cash equivalent thereof (at the option
of the Trust), (ii) options subject to grant under the option plans described
in Schedule 3.3(b) of this Agreement, or (iii) as described in Schedule 3.3(c)
to this Agreement, there are no existing options, warrants, calls,
subscriptions, convertible securities, or other rights, agreements or
commitments which obligate the Trust to issue, transfer or sell any shares of
capital stock or other equity interests of the Trust.

                 (b)      Except as described in Schedule 3.3(a), no Subsidiary
has issued Partnership Units or granted securities convertible into interests
in the Trust or in any Subsidiary and no Subsidiary is a party to any
outstanding commitment of any kind relating to, or any presently effective
agreement or understanding with respect to, interests in the Trust or in any
Subsidiary, whether issued or unissued.

                 (c)      Except for the Trust's interests in the Subsidiaries
or as described in Schedule 3.3(c), none of the Trust or any of its
Subsidiaries owns directly or indirectly any interest or investment (whether
equity or debt) in any corporation, partnership, joint business, trust or other
legal entity (other than investments in short-term investment securities).

                 Section 3.4      No Conflicts; No Defaults; Required Filings
and Consents.  Neither the execution and delivery by the Trust hereof or of the
Merger Agreement nor the consummation by the Trust of the transactions
contemplated hereby or by the Merger Agreement in accordance with the terms
hereof and thereof, will:

                 (a)      conflict with or result in a breach of any provisions
         of the Trust Declaration or By-laws of the Trust;

                 (b)      except as described in Schedule 3.4(b), result in a
         breach or violation of, a default under, or the triggering of any
         payment or other obligation pursuant to, or accelerate vesting under,
         any Trust or Subsidiary stock option plan, option plan or similar
         compensation plan or any grant or award made under any of the
         foregoing;





                                      -12-
<PAGE>   19
                 (c)      violate or conflict with any statute, regulation,
         judgment, order, writ, decree or injunction applicable to the Trust or
         to any of its Subsidiaries;

                 (d)      except as described in Schedule 3.4(d), violate or
         conflict with or result in a breach of any provision of, or constitute
         a default (or any event which, with notice or lapse of time or both,
         would constitute a default) under, or result in the termination or in
         a right of termination or cancellation of, or accelerate the
         performance required by, or result in the creation of any Lien upon
         any of the properties of the Trust or of any of its Subsidiaries
         under, or result in being declared void, voidable or without further
         binding effect, any of the terms, conditions or provisions of any
         note, bond, mortgage, indenture, deed of trust or any franchise,
         permit, lease, contract, agreement or other instrument, commitment or
         obligation to which the Trust or any of its Subsidiaries is a party,
         or by which the Trust or any of its Subsidiaries or any of their
         properties is bound or affected; or

                 (e)      require any consent, approval or authorization of, or
         declaration, filing or registration with, any Government Authority,
         other than any filings required under the Securities Act of 1933, as
         amended (the "Securities Act"), the Securities Exchange Act of 1934,
         as amended (the "Exchange Act"), the Hart-Scott-Rodino Antitrust
         Improvements Act of 1976 (the "HSR Act"), state securities laws ("Blue
         Sky Laws") (collectively, the "Filings"), and any filings required to
         be made with the Texas State Department of Assessments and Taxation,
         if any, or any national securities exchange on which the Trust Common
         Shares are  listed.

                 Section 3.5      SEC Matters and Absence of Undisclosed
Liabilities.  (a) The Trust has delivered or made available to Buyer the Annual
Report on Form 10-K for the fiscal year ended December 31, 1997 filed by the
Trust with the Securities and Exchange Commission ("SEC") and all exhibits,
amendments and supplements thereto, including all documents incorporated by
reference therein (collectively, the "Form 10-K"), and each registration
statement, report, proxy statement or information statement and all exhibits
thereto prepared by the Trust or relating to the Trust Properties for the five
years prior to the date of this Agreement, each in the form (including exhibits
and any amendments thereto) filed with the SEC (collectively the "Trust
Reports").  The Trust Reports were filed with the SEC in a timely manner and
constitute all forms, reports and documents required to be filed by the Trust
under the Securities Act and the Exchange Act and the rules and regulations
promulgated thereunder (the "Securities Laws").  As of their respective dates,
the Trust Reports (i) complied as to form in all material respects with the
applicable requirements of the Securities Laws and (ii) did not contain any
untrue statement of a material fact or omit to state a material fact required
to be stated therein or





                                      -13-
<PAGE>   20
necessary to make the statements made therein, in the light of the
circumstances under which they were made, not misleading.  There is no
unresolved violation asserted by any Government Authority with respect to any
of the Trust Reports.

                 (b)      Each of the balance sheets included in or
incorporated by reference into the Trust Reports (including the related notes
and schedules) fairly presented the financial position of the entity or
entities to which it relates as of its date and each of the statements of
operations, shareholders' equity (deficit) and cash flows included in or
incorporated by reference into the Trust Reports (including any related notes
and schedules) fairly presented the results of operations, retained earnings or
cash flows, as the case may be, of the entity or entities to which it relates
for the period covered thereby, in each case in accordance with United States
generally accepted accounting principles ("GAAP") consistently applied during
the periods involved and in accordance with Regulation S-X promulgated by the
SEC, except as may be noted therein and except, in the case of the unaudited
statements, for normal recurring year-end adjustments which would not,
individually or in the aggregate, reasonably be expected to result in a
Material Adverse Effect.

                 (c)      Except as and to the extent set forth in the Trust
Reports or in any Schedule hereto, to the best of the Trust's knowledge, none
of the Trust or any of its Subsidiaries has any material Liabilities, nor do
there exist any circumstances that would, individually or in the aggregate,
reasonably be expected to result in a Material Adverse Effect.

                 Section 3.6      Litigation; Compliance With Law. (a) Except
as disclosed in Schedule 3.6(a), there are no Actions pending or, to the
Trust's knowledge, threatened against the Trust or any of its Subsidiaries that
would, individually or in the aggregate, reasonably be expected to result in a
Material Adverse Effect, or which question the validity hereof or of the Merger
Agreement or of the any action taken or to be taken in connection herewith or
with the Merger Agreement.  Except as disclosed in Schedule 3.6(a), there are
no continuing orders, injunctions or decrees of any Government Authority to
which the Trust or any of its Subsidiaries is a party or by which any of its
properties or assets are bound.

                 (b)      None of the Trust or any of its Subsidiaries is in
material violation of any statute, rule, regulation, order, writ, decree or
injunction of any Government Authority or any body having jurisdiction over
them or any of their respective properties which, if enforced, would,
individually or in the aggregate, reasonably be expected to result in a
Material Adverse Effect.

                 Section 3.7      Absence of Certain Changes or Events.  Except
as disclosed in Schedule 3.7 or in any Trust Report or other filings made by
the Trust with the SEC, since January 1,





                                      -14-
<PAGE>   21
1996, the Trust and each of its Subsidiaries has conducted its business only in
the ordinary course of such business and has not acquired any real estate or
entered into any financing arrangements in connection therewith, and there has
not been (a) any change, circumstance or event that would reasonably be
expected to result in a Material Adverse Effect, (b) any declaration, setting
aside or payment of any dividend or other distribution with respect to the
Trust Common Shares, (c) any commitment, contractual obligation, borrowing,
capital expenditure or transaction (each, a "Commitment") entered into by the
Trust or any of its Subsidiaries, other than Commitments which would not,
individually or in the aggregate, be expected to result in a Material Adverse
Effect, or (d) any change in the Trust's accounting principles, practices or
methods.

                 Section 3.8      Tax Matters; REIT & Partnership Status. (a)
The Trust and each of its Subsidiaries has timely filed with the appropriate
taxing authority all Tax Returns required to be filed by it or has timely
requested extensions and any such request has been granted and has not expired.
Each such Tax Return is complete and accurate in all material respects.  All
information shown on any Tax Return is correct in all material respects, and
all material Taxes shown as owed by the Trust or by any of its Subsidiaries on
any Tax Return have been paid or accrued, except for Taxes contested in good
faith and for which adequate reserves have been taken.  Each of the Trust and
each of its Subsidiaries has properly accrued all Taxes for periods subsequent
to the periods covered by such Tax Returns as required by GAAP.  None of the
Trust or any of its Subsidiaries has executed or filed with the IRS or any
other taxing authority any agreement now in effect extending the period for
assessment or collection of any Tax.  None of the Trust or any of its
Subsidiaries is a party to any pending action or proceeding by any taxing
authority for assessment or collection of any Tax, and no claim for assessment
or collection of any Tax has been asserted against it.  No claim has been made
by any authority in a jurisdiction where the Trust or any of its Subsidiaries
does not file Tax Returns that it is or may be subject to taxation or reporting
in that jurisdiction.  There is no dispute or claim concerning any information,
reporting or tax liability of the Trust or of any of its Subsidiaries, (i)
claimed or raised by any taxing authority in writing or (ii) as to which the
Trust or any of its Subsidiaries has knowledge.  The Trust is a
"domestically-controlled" REIT within the meaning of Code Section 897(h)(4)(B),
and all nondomestic registered, and to the knowledge of the Trust beneficial,
owners of Trust Common Shares are listed in Schedule 3.8(a).  To the Trust's
knowledge, no Person or entity which would be treated as an "individual" for
purposes of Section 542(a)(2) of the Code (as modified by Section 856(h) of the
Code) owns or would be considered to own (taking into account the ownership
attribution rules under Section 544 of the Code, as modified by Section 856(h)
of the Code) in excess of 9.8% of the value of the outstanding equity interests
in the Trust.





                                      -15-
<PAGE>   22
                 (b)      The Trust (i) intends in its federal income tax
return for the tax year ended December 31, 1997 and for the tax year that will
end on December 31, 1998 to elect to be taxed as a real estate investment trust
within the meaning of Section 856 of the Code ("REIT") and has complied (or
will comply) with all applicable provisions of the Code relating to a REIT, for
1993 through the date hereof, (ii) has operated, and will to continue to
operate, in such a manner as to qualify as a REIT for 1998, (iii) has not taken
or omitted to take any action which would reasonably be expected to result in a
challenge to its status as a REIT, and, no such challenge is pending or
threatened, and (iv) will not be rendered unable to qualify as a REIT for
federal income tax purposes as a consequence of the transactions contemplated
hereby and by the Merger Agreement.

                 (c)      Except as described in Schedule 3.8(c), no amount or
other entitlement that could be received (whether in cash or property or the
vesting of property) as a result of any of the transactions contemplated hereby
by any employee, officer, or manager of the Trust or of any of its Subsidiaries
or of any of their Affiliates who is a "disqualified individual" (as such term
is defined in proposed Treasury Regulation Section 1.28OG-1) under any
employment, severance or termination agreement, other compensation arrangement
or plan currently in effect would be characterized as an "excess parachute
payment" (as such term is defined in Section 280G(b)(2) of the Code).

                 (d)      Except as described in Schedule 3.8(d), the
disallowance of a deduction under Section 162(m) of the Code for employee
remuneration will not apply to any amount paid or payable by the Trust or by
any of its Subsidiaries under any contract, stock plan, program, arrangement or
understanding currently in effect.

                 (e)      The Trust was eligible to and did validly elect to be
taxed as a REIT for federal income tax purposes for calendar year 1993 and all
subsequent taxable periods.  Each Subsidiary organized as a partnership or
limited liability company (and any other Subsidiary that files Tax Returns as a
partnership for federal income tax purposes) was and, as of the date hereof,
continues to be, and will continue to be through the Second Closing Date,
classified as a partnership for federal income tax purposes.

                 (f)      For each taxable year beginning with the Trust's
first taxable year which ended December 31, 1985, the dividends paid by the
Trust on the Trust Common Shares have been and will continue to be paid pro
rata, with no preference to any Trust Common Share as compared with other
shares.

                 (g)      The Trust has not actively conducted a business (i)
from which it earns fees for services it performs and (ii) that would cause (a)
the Trust's REIT status to be lost or (b) rents from real property to be
treated as not rent under the Code.





                                      -16-
<PAGE>   23
                 (h)      As required by Treasury Regulation Section 1.857-8,
the Trust has maintained and will continue to maintain the necessary records
regarding the actual ownership of its shares, and will timely make (i.e., by
January 30 of each calendar year) the requisite information requests of its
shareholders regarding share ownership and will maintain a list of the Persons
failing or refusing to comply in whole or in part with the Trust's demand for
statements regarding share ownership.  The Trust will continue to maintain such
records for all years, as required by law.

                 (i)      The Trust has never owned more than ten percent (10%)
of the common shares of any corporation other than a "Qualified REIT
Subsidiary," i.e., (i) before 1998, a corporation, all of whose shares were
always owned by the Trust, and (ii) after January 1, 1998, a corporation (a)
all of whose shares are owned by the Trust, and (b) all of whose earnings and
profits existing at the time the Trust acquired all of its shares are
distributed before the end of the tax year in which all of the shares are
acquired.  With respect to any Subsidiary and the Trust itself, since January
1, 1993 none have had "earnings and profits," as defined in the Code.

                 Section 3.9      Compliance with Agreements. (a) Neither the
Trust nor any of the Subsidiaries is in default under or in violation of any
provision of the Trust Declaration, the By-laws of the Trust, its partnership
agreement, operating agreement or any similar organizational document.

                 (b)      Each of the Trust and each of its Subsidiaries has
filed all reports, registrations and statements, together with any amendments
required to be made with respect thereto, that it was required to file with any
Government Authority and all other reports and statements required to be filed
by it, including any report or statement required to be filed pursuant to the
laws, rules or regulations of the United States, and has paid all fees or
assessments due and payable in connection therewith.  There is no unresolved
violation asserted by any regulatory agency of which the Trust has received any
written notice which, if resolved in a manner unfavorable to the Trust or any
Subsidiary, would, individually or in the aggregate, reasonably be expected to
result in a Material Adverse Effect.

                 (c)      Schedule 3.9(c) sets forth (i) a description of all
material indebtedness of the Trust and of each of its Subsidiaries, whether
unsecured or secured or collateralized by mortgages, deeds of trust or other
security interests in the Trust Property or any other assets of the Trust or of
any Subsidiary, or otherwise and (ii) each Commitment currently in effect
entered into by the Trust or by any of the Subsidiaries (including any
guarantees of any third party's debt or any obligations in respect of letters
of credit issued for the Trust's or any Subsidiary's account) which may result
in total payments or liability in excess of $100,000, excluding Commitments
that are terminable on 30 days or less notice, and





                                      -17-
<PAGE>   24
excluding Commitments the breach of which would not, individually or in the
aggregate, reasonably be expected to result in a Material Adverse Effect.
Neither the Trust nor any of the Subsidiaries is in default, and, to the
Trust's knowledge, no event has occurred which, with the giving of notice or
the lapse of time or both, would constitute a default, under any of the
documents described in clause (i) or (ii) of the first sentence of this
paragraph or in respect of any payment obligations thereunder.  All joint
venture and partnership agreements to which the Trust or any of the
Subsidiaries is a party as of the date hereof are described in Schedule 3.9(c),
all of which are in full force and effect as against the Trust or the
applicable Subsidiary and, to the Trust's knowledge, as against the other
parties thereto, and none of the Trust or any of the Subsidiaries is in
default, and, to the Trust's knowledge, no event has occurred which, with the
giving of notice or the lapse of time or both, would constitute a default, with
respect to any obligations thereunder, except as would not, individually or in
the aggregate, reasonably be expected to result in a Material Adverse Effect.
To the Trust's knowledge, the other parties to such agreements are not in
breach of any of their respective obligations thereunder, except as would not,
individually or in the aggregate, reasonably be expected to result in a
Material Adverse Effect.  To the Trust's knowledge, there is no condition with
respect to any of the Subsidiaries (including with respect to the partnership
agreements for its Subsidiaries that are partnerships) that would, individually
or in the aggregate, reasonably be expected to result in a Material Adverse
Effect.

                 (d)      Except as disclosed in any other Schedule hereto,
Schedule 3.9(d) sets forth a complete and accurate list of all material
agreements to which the Trust or any of its Subsidiaries is a party as of the
date hereof relating to the development or construction of, additions or
expansions to, or management or leasing services for, light industrial
properties or office buildings or other real properties which are currently in
effect and under which the Trust or any of its Subsidiaries currently has, or
expects to incur, any material obligation.

                 (e)      Except for (i) agreements made in the ordinary course
of business with a maturity of less than one year or that are terminable on 30
days or less notice, and (ii) agreements the breach or nonfulfillment of which
would not, individually or in the aggregate, reasonably be expected to result
in a Material Adverse Effect, Schedule 3.9(e) sets forth a complete and
accurate list of all material agreements to which the Trust or any Subsidiary
is a party as of the date hereof which are not listed in any other Schedule
hereto or are not exhibits to any filing made by the Trust with the SEC.  Each
agreement listed on Schedule 3.9(e) is in full force and effect as against the
Trust and, to the Trust's knowledge, as against the other parties thereto, no
payments, if any, are delinquent, no notice of default thereunder has been sent
or received by the Trust or any of the Subsidiaries, and, to the Trust's
knowledge, no event has occurred which, with notice or lapse of time or both,
would





                                      -18-
<PAGE>   25
constitute such a default, except for any default that would not, individually
or in the aggregate, reasonably be expected to result in a Material Adverse
Effect.

                 (f)      Schedule 3.9(f) sets forth a complete and accurate
list of all agreements and written policies of the Trust in effect on the date
hereof relating to transactions with Affiliates and potential conflicts of
interest.  Each agreement or policy listed on Schedule 3.9(f) is in full force
and effect, and the Trust, each of the Subsidiaries and, to the Trust's
knowledge, the other parties thereto, are in compliance with such agreements or
policies, or such compliance has been waived by the Board of Managers as listed
on Schedule 3.9(f).

                 Section 3.10     Financial Records; Trust Declaration and
By-Laws; Corporate Records.  (a) The books of account and other financial
records of the Trust and of each of the Subsidiaries are in all respects true
and complete, have been maintained in accordance with good business practices,
and are accurately reflected in all respects in the financial statements
included in the Trust Reports.

                 (b)      The Trust has delivered or made available to Buyer
true and complete copies of the Trust Declaration and the By-laws of the Trust,
as amended to date, and the charter, by-laws, organizational documents,
partnership agreements and joint venture agreements of the Subsidiaries, and
all amendments thereto.  All such documents are listed in Schedule 3.10(b).

                 (c)      The minute books and other records of corporate,
trust or partnership proceedings of the Trust and of each of the Subsidiaries
contain accurate records of all meetings of the equity holders, managers and
other governing bodies thereof and accurately reflect in all material respects
all other corporate action of the Managers, shareholders and directors and any
committees of the Board of Managers and of the Subsidiaries which are
corporations and all actions of the partners of the Subsidiaries which are
partnerships.

                 Section 3.11     Properties.  (a) Schedule 3.11(a) sets forth
a complete and accurate list and the address of all real property owned or
leased by the Trust or by any of the Subsidiaries or otherwise used by the
Trust or by any of the Subsidiaries in the conduct of their business or
operations.  That real property, together with the land at each address
referenced in Schedule 3.11(a) and all buildings, structures and other
improvements and fixtures located on or under such land and all easements,
rights and other appurtenances to such land shall be referred to individually
as a "Trust Property" and collectively as the "Trust Properties".  To the
Trust's knowledge the Trust, or, in the case of Trust Properties owned by
Subsidiaries, the Subsidiary or trustees holding legal title solely for the
benefit of a Subsidiary indicated in Schedule 3.11(a), owns good and
indefeasible fee simple title (or, if so indicated in Schedule 3.11(a),
leasehold title) to each of the





                                      -19-
<PAGE>   26
Trust Properties, in each case free and clear of any Liens, title defects,
common restrictions or covenants, laws, ordinances or regulations affecting use
or occupancy (including zoning regulations and building codes) or reservations
of interests in title (collectively, "Property Restrictions"), except for (i)
Trust Permitted Liens and (ii) Property Restrictions imposed or promulgated by
law or by any Government Authority which are customary and typical for similar
properties.  To the Trust's knowledge, none of the Trust Permitted Liens
interferes with, impairs, or is violated by the present use, occupancy or
operation (or if applicable, development) of any Trust Property and none of the
Property Restrictions interferes with, impairs, or is violated by, the
existence of any building or other structure or improvement which constitutes a
part of, or the present use, occupancy or operation (or, if applicable,
development) of, any Trust Property, except, in each such case, to the extent
that any interference, impairment or violation would not, individually or in
the aggregate, reasonably be expected to have a Material Adverse Effect.
American Land Title Association policies of title insurance (or marked title
insurance commitments having the same force and effect as title insurance
policies) have been issued by national title insurance companies insuring the
fee simple or leasehold, as applicable, title of the Trust or a Subsidiary or a
trustee holding legal title solely for the benefit of a Subsidiary, as
applicable, to each of the Trust Properties in amounts at least equal to the
original cost thereof, subject only to Trust Permitted Liens, and to the
Trust's knowledge, such policies are valid and in full force and effect and no
claim has been made under any such policy.

                 (b)      Except as described in Schedule 3.11(b), the Trust
has no knowledge (i) that any currently required certificate, permit or license
(including building permits and certificates of occupancy for tenant spaces)
from any Government Authority having jurisdiction over any Trust Property or
any agreement, easement or other right that is necessary to permit the lawful
use, occupancy or operation of the existing buildings, structures or other
improvements that constitute a part of any of the Trust Properties or which are
necessary to permit the lawful use and operation of any existing driveways,
roads or other areas of ingress and egress to and from any of the Trust
Properties has not been obtained or is not in full force and effect, or of any
pending threat of modification or cancellation of any of same, or (ii) of any
violation by any Trust Property of any federal, state or municipal law,
ordinance, order, regulation or requirement, including any applicable zoning
law or building code, arising from the use or occupancy of such Trust Property
or otherwise.  Except as described in Schedule 3.11(b), the Trust has no
knowledge of any current uninsured physical damage to any Trust Property in
excess of $25,000.  To the Trust's knowledge, except for repairs identified in
the Trust Capital Expenditure Budget and Schedule, each Trust Property: (i) is
in good operating condition and repair and is structurally sound and free of
defects, with no material alterations or repairs being required





                                      -20-
<PAGE>   27
thereto under applicable law or insurance company requirements, and (ii)
consists of sufficient land areas, driveways and other improvements and lawful
means of access and utility service and capacity to permit the use thereof in
the manner and for the purposes to which it is presently devoted (or, in the
case of the Development Properties, for the development and operation thereon
of the applicable Project), except, in each such case, to the extent that
failure to meet such standards would not, individually or in the aggregate,
reasonably be expected to have a Material Adverse Effect.

                 (c)      The Trust has no knowledge (i) except as described in
Schedule 3.11(c) that any condemnation, eminent domain or rezoning proceedings
are pending or threatened with respect to any of the Trust Properties, (ii)
except as described in Schedule 3.11(c), that any road widening or change of
grade of any road adjacent to any Trust Property is underway or has been
proposed, (iii) of any proposed change in the assessed valuation of any Trust
Property other than customarily scheduled revaluations, (iv) of any special
assessment made or threatened against any Trust Property, or (v) that any of
the Trust Properties is subject to any so-called "impact fee" or to any
agreement with any Government Authority to pay for sewer extension, oversizing
utilities, lighting or like expenses or charges for work or services by such
Government Authority, except, in the case of each of the foregoing, to the
extent that same would not, individually or in the aggregate, reasonably be
expected to have a Material Adverse Effect.

                 (d)      To the Trust's knowledge, each of the Trust
Properties is an independent unit which does not rely on any facilities located
on any property not included in such Trust Property to fulfill any municipal or
governmental requirement or for the furnishing to such Trust Property of any
essential building systems or utilities, other than facilities the benefit of
which inures to the Trust Properties pursuant to one or more valid easements.
Each of the Trust Properties is served by public water and sanitary systems and
all other utilities, and, to the Trust's knowledge, each of the Trust
Properties has lawful access to public roads, in all cases sufficient for the
current use and occupancy of that Trust Property (or, in the case of the
Development Properties, for the development and operation thereon of the
applicable Project).  To the Trust's knowledge, all parcels of land included in
each Trust Property that purport to be contiguous are contiguous and are not
separated by strips or gores.  To the Trust's knowledge, no portion of any
Trust Property lies in any flood plain area (as defined by the U.S. Army Corps
of Engineers or otherwise) or includes any wetlands or vegetation or species
protected by any applicable laws.  To the Trust's knowledge, no improvements
constituting a part of any Trust Property encroach on real property not
constituting a part of such Trust Property.

                 (e)      Except for matters addressed in the Trust Capital
Expenditure Budget and Schedule, no Trust Property fails to





                                      -21-
<PAGE>   28
comply with the requirements of the ADA except for such noncompliance as the
Trust reasonably believes will not, individually or in the aggregate, have a
Material Adverse Effect.

                 (f)      The Trust has provided to Buyer an accurate rent roll
for each Trust Property for the month ended June 30, 1998 (the "Rent Roll"),
which identifies and accurately describes each lease of space in each Trust
Property (collectively, the "Trust Leases").  The Trust has delivered to Buyer
an abstract of each Trust Lease (the "Trust Abstracts") which accurately
describes the material terms thereof.  With respect to each Trust Lease for
premises larger than 20,000 square feet of rentable space (collectively, the
"Material Trust Leases"), except as described in Schedule 3.11(f) and except
for matters that are not, individually or in the aggregate, reasonably expected
to have a material effect on any Trust Property, (i) each of the Material Trust
Leases is valid and subsisting and in full force and effect as against each
party thereto, and has not been amended, modified or supplemented, other than
by any amendment, modification or supplement that has been provided to Buyer,
(ii) the tenant under each of the Material Trust Leases is in actual possession
of the premises leased thereunder, (iii) no tenant under any Material Trust
Lease is more than 30 days in arrears in the payment of rent, (iv) none of the
Trust or any of its Subsidiaries has received any written notice from any
tenant under any Material Trust Lease of its intention to vacate, (v) none of
the Trust or any of its Subsidiaries has collected payment of rent under any
Material Trust Lease (other than security deposits) for a period which is more
than one month in advance, (vi) no notice of default has been sent or received
by the landlord under any Material Trust Lease with respect to any defect that
remains uncured as of the date hereof, no default has occurred under any
Material Trust Lease and, to the Trust's knowledge, no event has occurred and
is continuing which, with notice or lapse of time or both, would constitute a
default under any Material Trust Lease, (vii) no tenant under any of the
Material Trust Leases has any purchase option or kick-out right or is entitled
to any concession, allowance, abatement, set-off, rebate or refund, (viii) none
of the Material Trust Leases and none of the rents or other amounts payable
thereunder has been assigned, pledged or encumbered except in connection with
financing secured by the applicable Trust Property, which is described in
Schedule 3.9(c), (ix) no brokerage or leasing commission or other compensation
is due or payable to any Person with respect to or on account of any of the
Material Trust Leases or any extensions or renewals thereof, (x) except as set
forth in the Trust Abstracts, no space of a material size in any Trust Property
is occupied by a tenant rent-free, (xi) no tenant under any of the Material
Trust Leases has asserted any claim which is likely to affect the collection of
rent from such tenant, and (xii) the landlord under each Material Trust Lease
has fulfilled all of its obligations thereunder in respect of tenant
improvements and capital expenditures.  Other than the tenants identified in
the Rent Roll and Trust Abstracts and parties to easement agreements which
constitute Trust Permitted Liens, no third party has any right to occupy or use
any portion of any Trust Property.  The Rent Roll





                                      -22-
<PAGE>   29
or Trust Abstracts include a budget for all material tenant improvements and
similar material work required to be performed by the lessor under each of the
Material Trust Leases.

                 (g)      Schedule 3.11(g) sets forth a complete and accurate
list of all material commitments, letters of intent or written understandings
made or entered into by the Trust or any of its Subsidiaries as of the date
hereof (x) to lease any space larger than 20,000 rentable square feet at any of
the Trust Properties, (y) to sell, mortgage, or pledge any Trust Property or to
otherwise enter into a material transaction or arrangement in respect of the
ownership or financing of any Trust Property, or (z) to purchase or acquire an
option, right of first refusal or similar right in respect of any real
property, which, in any such case has not yet been reduced to a written lease
or contract, and sets forth with respect to each such commitment, letter of
intent or other understanding the principal terms thereof.

                 (h)      Except as set forth in the Rent Roll or Trust
Abstracts, and except for certain rights of first refusal which are set forth
in the sections of the partnership agreements referenced in Schedule 3.1(d) and
which relate to partnerships in which the Trust, directly or indirectly, owns
less than a 100% interest, none of the Trust or any of its Subsidiaries has
granted any outstanding options or has entered into any outstanding contracts
with others for the sale, mortgage, pledge, hypothecation, assignment,
sublease, lease or other transfer of all or any part of any Trust Property, and
no Person has any right or option to acquire, or right of refusal with respect
to, the Trust's or any of its Subsidiaries' interest in any Trust Property or
any part thereof.  Except as described in Schedule 3.11(h) none of the Trust or
any Subsidiary has any outstanding options or rights of first refusal or has
entered into any outstanding contracts with others for the purchase of any real
property.

                 (i)      Schedule 3.11(i) contains a complete and accurate
description of any material noncompliance by any Trust Property, to the Trust's
knowledge, with any law, ordinance, code, health and safety regulation or
insurance requirement (except for the ADA, which is addressed in this respect
in Section 3.11(e) above) other than such noncompliance as would not,
individually or in the aggregate, reasonably be expected to have a Material
Adverse Effect.  Schedule 3.11(i) also sets forth the Trust's and each
Subsidiary's capital expenditure budget and schedule for each Trust Property
(the "Trust Capital Expenditure Budget and Schedule"), which describes the
capital expenditures which the Trust or any Subsidiary has budgeted for such
Trust Property that was acquired prior to March 25, 1998 for the period from
December 31, 1997 through December 31, 1999.  To the Trust's knowledge, the
costs and time schedules for 1998 and 1999 set forth in the Trust Capital
Expenditure Budget and Schedule are reasonable estimates and projections.
Except as described in Schedule 3.11(i), there are no outstanding, or to the
Trust's





                                      -23-
<PAGE>   30
knowledge, threatened requirements of any insurance company which has issued an
insurance policy covering any Trust Property, or of any board of fire
underwriters or other body exercising similar functions, requiring any repairs
or alterations to be made to any Trust Property.

                 (j)      Schedule 3.11(j) contains a list of each Trust
Property which consists of or includes undeveloped land or which is in the
process of being developed or rehabilitated (each, a "Development Property,"
and collectively, the "Development Properties") and a brief description of the
development or rehabilitation intended by the Trust or any Subsidiary to be
carried out or completed thereon (collectively, the "Projects"), including any
budget and development or rehabilitation schedule therefor prepared by or for
the Trust or any Subsidiary (collectively, the "Development Budget and
Schedule").  Except as disclosed in Schedule 3.11(j), each Development Property
is zoned for the lawful development thereon of the applicable Project, and the
Trust or a Subsidiary has obtained all permits, licenses, consents and
authorizations required for the lawful development or rehabilitation thereon of
such Project, except only for such failure to meet the foregoing standards as
would not, individually or in the aggregate, reasonably be expected to have a
Material Adverse Effect.  Except as described in Schedule 3.11(j), to the
Trust's knowledge, there are no material impediments to or constraints on the
development or rehabilitation of any Project in all material respects within
the time frame and for the cost set forth in the Development Budget and
Schedule applicable thereto.  In the case of each Project the development of
which has commenced, to the Trust's knowledge, the costs or expenses incurred
in connection with such Project and the progress thereof are, except as
described in Schedule 3.11(j), consistent and in compliance in all material
respects with all aspects of the Development Budget and Schedule applicable
thereto.

                 (k)      The Trust has disclosed to Buyer all adverse matters
known to the Trust with respect to or in connection with the Trust Properties
(including the Trust Leases and the Trust Tenancy Leases), which would,
individually or in the aggregate, reasonably be expected to have a Material
Adverse Effect.

                 (l)      The ground leases underlying the leased Trust
Properties referenced in Schedule 3.11(a) (collectively, the "Trust Tenancy
Leases") are listed in Schedule 3.11(l).  Each of the Trust Tenancy Leases is
valid, binding and in full force and effect against the applicable Subsidiary
and, to the Trust's knowledge, against the other party thereto.  Except as
indicated in Schedule 3.11(l), none of the Trust Tenancy Leases is subject to
any pledge, lien, sublease, assignment, license or other agreement granting to
any third party any interest in or any right to the use or occupancy of any
premises leased thereunder.  To the Trust's knowledge, except as described in
Schedule 3.11(l), there is no pending or threatened proceeding which is
reasonably likely to interfere with the quiet enjoyment of the





                                      -24-
<PAGE>   31
tenant under any of the leases.  Except as described in Schedule 3.11(l), no
payments under any Tenancy lease are delinquent and no notice of default
thereunder has been sent or received by the Trust or any of its Subsidiaries.
There does not exist under any of the Trust Tenancy Leases any default, and, to
the Trust's knowledge, no event has occurred which, with notice or lapse of
time or both, would constitute such a default, except as would not,
individually or in the aggregate, be reasonably expected to have a Material
Adverse Effect.

                 (m)      Each of the Trust and each of its Subsidiaries has
good and sufficient title to all the personal and other property and assets
reflected in their books and records as being owned by them (including those
reflected in the balance sheets of the Trust and its Subsidiaries as of March
31, 1998, except as since sold or otherwise disposed of in the ordinary course
of business), free and clear of all liens, except for Trust Permitted Liens
which are not, individually or in the aggregate, reasonably expected to have a
material adverse effect on any Trust Property.

                 Section 3.12     Environmental Matters. (a) To the Trust's
knowledge, each of the Trust and its Subsidiaries has obtained and now
maintains as currently valid and effective all permits required under
Environmental Laws (the "Environmental Permits") in connection with the
operation of its businesses and properties, all of which are listed in Schedule
3.12(a). To the Trust's knowledge, except as disclosed in the Executive
Summaries of the Trust Environmental Reports, each of the Trust and its
Subsidiaries, and each Trust Property, is and has been in compliance with all
terms and conditions of the Environmental Permits and all Environmental Laws,
except for any noncompliance that would not, individually or in the aggregate,
reasonably be expected to have a material adverse effect on any Trust Property.
The Trust has no knowledge of any circumstances that may prevent or interfere
with such compliance in the future.

                 (b)      Each of the Trust and its Subsidiaries has provided
to Buyer all material written information and written communications (whether
from a Government Authority, citizens' group, employee or other Person) in its
possession or control regarding (i) alleged or suspected noncompliance of any
of the Trust Properties with any Environmental Laws or Environmental Permits or
(ii) alleged or suspected liability of the Trust or its Subsidiaries under any
Environmental Law.

                 (c)      There are no environmental liens or encumbrances on
any of the Trust Properties and, to the Trust's knowledge, no government
actions have been taken or are in process which are reasonably likely to
subject any Trust Property to such liens or other encumbrances.

                 (d)      No Environmental Claim with respect to the operations
or the businesses of the Trust or of its Subsidiaries, or with respect to the
Trust Properties, has been asserted or, to





                                      -25-
<PAGE>   32
the Trust's knowledge, threatened, and, to the Trust's knowledge, no
circumstances exist with respect to the Trust or any of its Subsidiaries or the
Trust Properties that would reasonably be expected to result in any
Environmental Claim being asserted, in any such case, against (i) the Trust or
any of its Subsidiaries, or (ii) any Person whose liability for any
Environmental Claims the Trust or any of its Subsidiaries has or may have
retained or assumed either contractually or by operation of law.

                 (e)      Except as disclosed in Schedule 3.12(e) or set forth
in the Executive Summaries of the Trust Environmental Reports: (i) none of the
Trust or any of the Subsidiaries has been notified or has reason to anticipate
being notified of potential responsibility in connection with any site that has
been placed on, or proposed to be placed on, the National Priorities List or
its state or foreign equivalent pursuant to the Comprehensive Environmental
Response, Compensation and Liability Act ("CERCLA"), 42 U-S.C. Section  9601 et
seq., or analogous state or foreign laws, (ii) to the Trust's knowledge, no
Materials of Environmental Concern are present on, in or under any Trust
Property in a manner or condition that is reasonably likely to give rise to an
Environmental Claim which would reasonably be expected to result in a Material
Adverse Effect, (iii) to the Trust's knowledge, none of the Trust, any
Subsidiary or any tenant of any Trust Property has Released or arranged for the
Release of any Materials of Environmental Concern at any location to an extent
or in a manner which would reasonably be expected to result in a material
effect on any Trust Property, (iv) to the Trust's knowledge, no underground
storage tanks, surface disposal areas, pits, ponds, lagoons, open trenches or
equipment is present at any Trust Property, (v) to the Trust's knowledge, no
transformers, capacitors or other equipment containing fluid with more than 50
parts per million polychlorinated biphenyls are present at any Trust Property,
except for any such transformers, capacitation or other equipment owned by any
utility company, and (vi) to the Trust's knowledge, no employee, agent,
contractor, subcontractor or tenant of the Trust or of any of the Subsidiaries
is now or has in the past been exposed to friable asbestos or
asbestos-containing material at any Trust Property.

                 (f)      Schedule 3.12(f) contains a list of the most recent
Phase I environmental reports prepared for the Trust or the Subsidiaries or
otherwise in the possession of any of them with respect to the environmental
condition of any Trust Property (collectively, the "Trust Environmental
Reports").  True and complete copies of the executive summaries or conclusions
included in the Trust Environmental Reports (collectively, the "Executive
Summaries of the Trust Environmental Reports") have been delivered or made
available by the Trust to Buyer.  To the Trust's knowledge, none of the matters
disclosed by the Summaries of the Trust Environmental Reports would,
individually or in the aggregate, be reasonably likely to have a Material
Adverse Effect.





                                      -26-
<PAGE>   33
                 (g)      For purposes of this Section 3.12, the terms listed
below have the following meanings:

                          (i)     "claim" means any action, cause of action,
                 suit, debt, dues, account, reckoning, bond, bill, covenant,
                 contract, controversy, promise, trespass, damage, judgment,
                 execution, claim, liability or demand whatsoever, in law or
                 equity.

                          (ii)    "Environmental Claim" means any Claim
                 investigation or notice (written or oral) by any Person
                 alleging potential liability (including potential liability
                 for investigatory costs, cleanup costs, governmental response
                 costs, natural resources damages, property damages, personal
                 injuries or fatalities, or penalties) arising out of, based on
                 or resulting from (A) the presence, generation,
                 transportation, treatment, use, storage, disposal or Release
                 of Materials of Environment Concern or the threatened Release
                 of Materials of Environmental Concern at any location, or (B)
                 activities or conditions forming the basis of any violation,
                 or alleged violation of, or liability or alleged liability
                 under, any Environmental Law.

                          (iii)   "Environmental Laws" means federal, state,
                 local, provincial, municipal and foreign laws, ordinances,
                 principles of common law, rules, by-laws, orders, governmental
                 policies, statutes, regulations, agreements, treaties,
                 customary law, and international principles relating to the
                 pollution or protection of the environment or of flora or
                 fauna or their habitat or of human health and safety, or to
                 the cleanup or restoration of the environment, including, but
                 not limited to, any laws relating to (A) generation,
                 treatment, storage, disposal or transportation of wastes,
                 emissions or discharges or protection of the environment from
                 the same, (B) exposure of Persons to, or Release or threat of
                 Release of, Materials of Environmental Concern, (C) noise, (D)
                 repetitive motion, and (E) the safety and health of workers
                 and employees.

                          (iv)    "Materials of Environmental Concern" means
                 all chemicals, pollutants, contaminants, wastes, toxic
                 substances, petroleum or any fraction thereof, petroleum
                 products and hazardous substances (as defined





                                      -27-
<PAGE>   34
                 in Section 101(14) of CERCLA, 42 U.S.C. Section  6601(14)), or
                 solid or hazardous wastes as now defined and regulated under
                 any Environmental Laws.

                          (v)     "Release" means any release, spill, emission,
                 leaking, pumping, injection, deposit, disposal, discharge,
                 dispersal, leaching or migration.

                 Section 3.13     Employees and Benefit Plans. (a) Schedule
3.13(a) sets forth a complete and accurate list of all employment agreements
with employees of the Trust or of any of the Subsidiaries.  Except for the
employees who are parties to such employment agreements, all of the employees
of the Trust and of each of its Subsidiaries are employed in an at-will status
(except for restrictions or limitations on the at-will status of such employees
imposed by general principles of law or equity).

                 (b)      Schedule 3.13(b) sets forth a complete and accurate
list of all Employee Benefit Plans and all material Benefit Arrangements which
affect Employees of the Trust or of any of its Subsidiaries (each, a "Trust
Plan").

                 (c)      With respect to each Trust Plan, (i) the Trust and
each of its Subsidiaries is in compliance in all material respects with the
terms of that Trust Plan and with the requirements prescribed by all applicable
statutes, orders or governmental rules or regulations, (ii) the Trust and each
of its Subsidiaries has contributed to each Pension Plan included in the Trust
Plan not less than the amounts accrued for such plan for all plan periods for
which payment is due, and (iii) none of the Trust or any of its Subsidiaries
has any funding commitment or other liabilities except as reserved for in the
financial statements included in or incorporated by reference into the Trust
Reports, except, in the case of each of clauses (i) through (iii), for such
matters as would not, individually or in the aggregate, reasonably be expected
to result in a Material Adverse Effect.

                 (d)      None of the Trust or any of its Subsidiaries has made
any commitment to establish any new Employee Benefit Plan, to modify any
Employee Benefit Plan, or to increase benefits or compensation of Employees of
the Trust or of any of its Subsidiaries (except for normal increases in
compensation consistent with past practices), and to the Trust's knowledge, no
intention to do so has been communicated to Employees of the Trust or of any of
its Subsidiaries.

                 (e)      There are no pending or, to the Trust's knowledge,
anticipated claims against or otherwise involving any of the Trust Plans or any
fiduciaries thereof with respect to their duties to the Plans and no suit,
action or other litigation (excluding claims for benefits incurred in the
ordinary course of Trust Plan activities) has been brought against or with
respect to any Trust Plan.





                                      -28-
<PAGE>   35
                 (f)      Neither the Trust or any entity under "common
control" with the Trust within the meaning of Section 4001 of ERISA has
contributed to, or been required to contribute to, any "multiemployer plan" (as
defined in Section 3(37) and 4001(a)(3) of ERISA).

                 (g)      Except as described in Schedule 3.13(g), the Trust
and its Subsidiaries do not maintain or contribute to any plan or arrangement
which provides or has any liability to provide life insurance, medical or other
employee welfare benefits to any Employee during his employment or upon his
retirement or termination of employment and, to the Trust's knowledge, the
Trust and its Subsidiaries have never represented, promised or contracted
(whether in oral or written form) to any employee or former employee that such
benefits would be provided.

                 (h)      For purposes hereof, "Employee Benefit Plans" means
each and all "employee benefit plans" as defined in Section 3(3) of ERISA
maintained or contributed to by a party hereto or in which a party hereto
participates or participated and which provides benefits to Employees,
including (i) any such plans that are "employee welfare benefit plans" as
defined in Section 3(1) of ERISA, including retirement medical and life
insurance ("Welfare Plans"), and (ii) any such plans that constitute "employee
pension benefit plans" as defined in Section 3(2) of ERISA ("Pension Plans").
"Benefit Arrangements" means life and health, hospitalization, savings, bonus,
deferred compensation, incentive compensation, holiday, vacation, severance
pay, sick pay, sick leave, disability, tuition refund, service award, company
car, scholarship, relocation, patent award, fringe benefit, individual
employment, consultation or severance and other polices or practices of a party
hereto providing employee or executive compensation or benefits to Employees,
other than Employee Benefit Plans.  "Employees" means all current employees,
former employees and retired employees of a party hereto or of any of the
Subsidiaries, including employees on disability, layoff or leave status.
"Controlled Group Liability" means any and all liabilities under (i) Title IV
of ERISA, (ii) Section 302 of ERISA, (iii) Sections 412 and 4971 of the Code,
(iv) the continuation coverage requirements of Section 601 et seq, of ERISA and
Section 4980B of the Code, and (v) corresponding or similar provisions of
foreign laws or regulations, other than such liabilities that arise solely out
of, or relate solely to, the Plans.

                 (i)      To the Trust's knowledge, with respect to each plan
that is subject to Title IV or Section 302 of ERISA or Section 412 or 4971 of
the Code: (i) there does not exist any accumulated deficiency within the
meaning of Section 412 of the Code or Section 302 of ERISA, whether or not
waived, (ii) the fair market value of the assets of such plan equals or exceeds
the actuarial present value of all accrued benefits under the





                                      -29-
<PAGE>   36
plan (whether or not vested), on a termination basis, (iii) no reportable event
within the meaning of Section 4043(c) of ERISA has occurred, and the
consummation of the transactions contemplated by this Agreement and the Merger
Agreement will not result in the occurrence of any such reportable event, and
(iv) all premiums to the Pension Benefit Guaranty Corporation have been timely
paid in full.

                 (j) There does not now exist, nor do any circumstances exist
that could result in, any Controlled Group Liability that would be a liability
of the Trust following the Closing.  Without limiting the generality of the
foregoing, neither the Trust nor any ERISA Affiliate has engaged in any
transaction described in Section 4069 or Section 4204 of ERISA.

                 (k)      Except as set forth in Schedule 3.13(k), either the
execution and delivery of this Agreement or the Merger Agreement nor the
consummation of the transactions contemplated hereby and thereby will (either
alone or in conjunction with any other event) result in, cause the accelerated
vesting or delivery of, or increase the amount or value of, any payment or
benefit to any employee of the Trust or of any Subsidiary.

                 Section 3.14     Labor Matters.  None of the Trust or any of
its Subsidiaries is a party to, or bound by, any collective bargaining
agreement, contract or other agreement or understanding with a labor union or
labor union organization.  Except for the matters described in Schedule 3.14
(none of which matters would, individually or in the aggregate, reasonably be
expected to have a Material Adverse Effect), there is no unfair labor practice
or labor arbitration proceeding pending or, to the knowledge of the Trust,
threatened against the Trust or any of its Subsidiaries.  To the knowledge of
the Trust, there are no organizational efforts with respect to the formation of
a collective bargaining unit presently being made or threatened involving
employees of the Trust or of any of its Subsidiaries.

                 Section 3.15     Affiliate Transactions.  Other than any
transaction involving USAA Real Estate Company, a Delaware corporation
("Realco"), and its Affiliates, Schedule 3.15 sets forth a complete and
accurate list of all transactions or currently proposed transactions or series
of related transactions entered into by the Trust or any of its Subsidiaries
since January 1, 1996 which are of a type that would be required to be
disclosed by the Trust pursuant to Item 404 of Regulation S-K of the Securities
Laws.

                 Section 3.16     Insurance.  The Trust maintains insurance
policies covering the assets, business, equipment, properties, operations,
employees, officers, managers, and directors of the Trust and of each of its
Subsidiaries (collectively, the "Insurance Policies") which are of a type and
in amounts customarily carried by Persons similar in size to the Trust
conducting businesses similar to those of the Trust.  There is no material
claim by the Trust or by any of its Subsidiaries





                                      -30-
<PAGE>   37
pending under any of the Insurance Policies as to which coverage has been
questioned, denied or disputed by the underwriters of such policies.

                 Section 3.17     Proxy Statement.  The Proxy Statement and all
of the information included or incorporated by reference therein (other than
any information supplied or to be supplied by Buyer for inclusion or
incorporation by reference therein) will not, as of the date such Proxy
Statement is first made available to the shareholders of the Trust and as of
the time of the meeting of the shareholders of the Trust in connection with the
transactions contemplated hereby, contain any untrue statement of a material
fact or omit to state any 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 Proxy Statement
will comply as to form in all material respects with the provisions of the
Exchange Act and the rules and regulations promulgated by the SEC thereunder.

                 Section 3.18     Takeover Statutes.  No "fair price,"
"moratorium," "control share acquisition" or other anti-takeover statute or
similar statute or regulation enacted by the State of Texas applies to the
transactions contemplated by this Agreement or the Merger Agreement.

                 Section 3.19     Brokers and Finders. No agent, broker,
investment banker or other Person, including any of the foregoing that is an
Affiliate of the Trust, is or will be entitled to any broker's or finder's fee
or any other commission or similar fee from the Trust in connection with this
Agreement or any of the transactions contemplated hereby for which Buyer will
be responsible.  Buyer acknowledges that the Trust is obligated to pay a fee to
each of Salomon Smith Barney and Prudential Securities Incorporated in
connection with the transaction contemplated hereby and by the Merger
Agreement.

                 Section 3.20     Knowledge Defined.  As used herein, the
phrase "to the Trust's knowledge" (or words of similar import) means the
knowledge of those individuals identified in Schedule 3.20, and includes any
facts, matters or circumstances set forth in any written notice from any
Government Authority or any other material notice received by the Trust or any
Subsidiary, and also includes any matter of which Buyer informs the Trust in
writing.


                                   ARTICLE 4

                    REPRESENTATIONS AND WARRANTIES OF BUYER

                 Buyer hereby represents and warrants to the Trust as follows:

                 Section 4.1      Organization.  Buyer is a corporation duly
incorporated, validly existing and in good standing under the laws of Ohio.
Buyer has all requisite corporate power and





                                      -31-
<PAGE>   38
authority to own, operate, lease and encumber its properties and carry on its
business as now conducted, and to enter into this Agreement and to perform its
obligations hereunder.

                 Section 4.2      Due Authorization.  The execution, delivery
and performance of this Agreement and of all of the documents and instruments
delivered in connection herewith by Buyer has been duly and validly authorized
by all necessary corporate action on the part of Buyer.  This Agreement is, and
the other documents and instruments required hereby will be, when executed and
delivered by Buyer, the valid and binding obligations of Buyer, enforceable
against Buyer in accordance with their respective terms, subject only to
bankruptcy, insolvency, reorganization, moratorium or similar laws at the time
in effect affecting the enforceability or right of creditors generally and to
general equitable principles which may limit the right to obtain equitable
remedies.

                 Section 4.3      Conflicting Agreements and Other Matters.
Neither the execution and delivery of this Agreement nor the performance by
Buyer of its obligations hereunder will conflict with, result in a breach of
the terms, conditions or provisions of, constitute a default under, result in
the creation of any mortgage, security interest, encumbrance, lien or of any
kind upon any of the properties or assets of Buyer pursuant to, or require any
consent, approval or other action by or any notice to or filing with any
Government Authority pursuant to, the organizational documents of Buyer or any
agreement, instrument, order, judgment, decree, statute, law, rule or
regulation by which Buyer is bound, except for any filings required by Sections
13(d) and 16 of the Exchange Act following each Closing.

                 Section 4.4      Acquisition for Investment; Sophistication.
Buyer is acquiring the Purchased Shares being purchased by it for its own
account for the purpose of investment and not with a view to or for sale in
connection with any distribution thereof, and Buyer has no present intention or
plan to effect any "distribution" (within the meaning of the Securities Act) of
the Purchased Shares, but the disposition of the Purchased Shares owned by
Buyer shall at all times be and remain within its control, subject to the
provisions of this Agreement, the Registration Rights Agreement and the
Securities Act.  Buyer is able to bear the economic risk of the acquisition of
the Purchased Shares pursuant hereto and pursuant to the Merger Agreement and
can afford to sustain a total loss on such investment, and has such knowledge
and experience in financial and business matters that it is capable of
evaluating the merits and risks of the transactions contemplated hereby, and
therefore has the capacity to protect its own interests in connection with the
acquisition of Purchased Shares pursuant hereto and pursuant to the Merger
Agreement.

                 Section 4.5      Proxy Statement.  None of the information
supplied or to be supplied by Buyer for inclusion or incorporation by reference
in the Proxy Statement, as of the date





                                      -32-
<PAGE>   39
the Proxy Statement is mailed to the shareholders of the Trust and as of the
time of the meeting of the shareholders of the Trust in connection with the
transactions contemplated hereby, will contain any untrue statement of a
material fact or omit to state any 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.

                 Section 4.6      Brokers or Finders.  No agent, broker,
investment banker or other firm or Person, including any of the foregoing that
is an Affiliate of Buyer, is or will be entitled to any broker's or finder's
fee or any other commission or similar fee from the Trust in connection with
this Agreement or any of the transactions contemplated hereby.  The Trust
acknowledges that Buyer is obligated to pay a fee to Chadwick & Saylor in
connection with the transactions contemplated hereby and by the Merger
Agreement.

                 Section 4.7      REIT Qualification Matters.  To Buyer's
knowledge, no Person which would be treated as an "individual" for purposes of
Section 542(a)(2) of the Code (as modified by Section 856(h) of the Code) owns
or would be considered to own (taking into account the ownership attribution
rules under Section 544 of the Code, as modified by Section 856(h) of the Code)
in excess of 9.8% of the value of the outstanding equity interest in Buyer.  At
each Closing, applying the stock ownership rules of Section 856(h) of the Code,
Buyer will be treated as a corporation, and the Purchased Shares that it owns
will be treated as owned proportionately by Buyer's shareholders.

                 Section 4.8      Investment Company Matters.  Buyer is not,
and after giving effect to the acquisition of the Purchased Shares contemplated
hereby will not be, an "investment company" or an entity "controlled" by an
"investment company," as such terms are defined in the Investment Company Act
of 1940, as amended.

                 Section 4.9      Legends; Stop-Transfer Orders.  (a)  The
certificates for the Purchased Shares will bear legends in substantially the
following form:

                 THE SHARES REPRESENTED HEREBY HAVE BEEN ACQUIRED FOR
                 INVESTMENT AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES
                 ACT OF 1933, AS AMENDED, OR UNDER THE SECURITIES LAWS OF ANY
                 STATE AND, ACCORDINGLY, MAY BE OFFERED, SOLD, TRANSFERRED OR
                 PLEDGED ONLY IN A TRANSACTION WHICH IS REGISTERED UNDER SUCH
                 ACT AND UNDER SUCH LAWS OR IS EXEMPTED FROM SUCH REGISTRATION
                 REQUIREMENTS.

                 THE SHARES ARE SUBJECT TO A STANDSTILL PROVISION SET FORTH IN
                 SECTION 6.11 OF THAT CERTAIN SHARE PURCHASE AGREEMENT DATED
                 JULY 30, 1998, BY AND BETWEEN THE ISSUER AND DEVELOPERS
                 DIVERSIFIED REALTY CORPORATION.





                                      -33-
<PAGE>   40
The legend set forth in the first paragraph shall be removed from any such
certificate at the request of the holder thereof at such times as the shares
represented thereby are registered under the Securities Act or become eligible
for resale under Rule 144 promulgated under the Securities Act.  The legend set
forth in the second paragraph shall be removed upon expiration of the
Standstill Period.

                 (b)      The certificates for the Purchased Shares may also
bear any legend required by any applicable state blue sky law.

                 (c)      Any certificates for the Purchased Shares will also
bear a legend relating to restrictions on transfer imposed pursuant to the
percentage ownership limitation contained in the Trust Declaration.

                 (d)      The Trust may impose appropriate stop-transfer
instructions relating to the restrictions set forth herein.


                                   ARTICLE 5

                       COVENANTS RELATING TO THE CLOSINGS

                 Section 5.1      Taking of Necessary Action. (a) Each party
hereto agrees to use its commercially reasonable best efforts promptly to take
or cause to be taken all action and promptly to do or cause to be done all
things necessary, proper or advisable under applicable laws and regulations to
consummate and make effective the transactions contemplated by this Agreement
and the Merger Agreement, subject to the terms and conditions hereof and of the
Merger Agreement.

                 (b)      As promptly as practicable after the Initial Closing,
the Trust shall prepare and file with the SEC a preliminary proxy statement
(the "Proxy Statement") by which the Trust's shareholders will be asked to
approve, in accordance with the rules of the NYSE and any applicable laws, the
issuance of Trust Common Shares contemplated under this Agreement and the
Merger Agreement.  The Proxy Statement as initially filed with the SEC, as it
may be amended and refiled with the SEC and as mailed to the Trust's
shareholders, shall be in form and substance reasonably satisfactory to Buyer.
The Trust shall respond to any comments of the SEC, and cause the Proxy
Statement to be mailed to the Trust's shareholders and shall cause any meeting
of the Board of Managers or the Trust's shareholders required to be held to
approve the issuance of the Purchased Shares at the earliest practicable time.
As promptly as practicable after the date hereof, the Trust shall prepare and
file any other filings required under the Exchange Act, the Securities Act or
any other federal, state or local laws relating to this Agreement and the
Merger Agreement and the transactions





                                      -34-
<PAGE>   41
contemplated hereby and thereby, including under the HSR Act and any state
takeover laws (the "Other Filings"), and Buyer shall prepare and file any
filings required by the HSR Act.  The Trust will notify Buyer promptly of the
receipt of any comments from the SEC or its staff and of any request by the SEC
or its staff or any other government official for amendments or supplements to
the Proxy Statement or any Other Filing or for additional information and will
supply Buyer with copies of all correspondence between the Trust or any of its
representatives, on the one hand, and the SEC or its staff or any other
government official, on the other hand, with respect to the Proxy Statement or
any Other Filing.  The Trust shall cause the Proxy Statement and any Other
Filing to comply in all material respects with all applicable requirements of
law.  Buyer shall provide the Trust all information about Buyer required to be
included or incorporated by reference in the Proxy Statement or any Other
Filing and shall otherwise cooperate with the Trust in taking the actions
described in this Section 5.1(b).  Whenever any event occurs which is required
to be set forth in an amendment or supplement to the Proxy Statement or any
Other Filing, the Trust or Buyer, as applicable, shall promptly inform the
other party of such occurrence and cooperate in filing with the SEC or its
staff or any other government officials, or mailing to shareholders of the
Trust, as required, such amendment or supplement.  Subject to the provisions of
Section 5.4, the Proxy Statement shall include the recommendation of the Board
of Managers that the shareholders of the Trust vote in favor of the issuance of
the Purchased Shares pursuant to this Agreement and the Merger Agreement.

                 Section 5.2      Public Announcement; Confidentiality. (a)
The initial press release or releases with respect to the transactions
contemplated by this Agreement and the Merger Agreement shall be in the form
agreed to by the Trust and Buyer.  Thereafter, for as long as this Agreement is
in effect, neither the Trust nor the Buyer shall issue or cause the publication
of any press release or any other announcement with respect to this Agreement,
the Merger Agreement, the Registration Rights Agreement, or the transactions
contemplated hereby or thereby without the consent of the other, except when
such release or announcement is required by applicable law or pursuant to any
listing agreement with, or the rules or regulations of, any securities exchange
or any other regulatory requirement.

                 (b)      Buyer agrees that all information provided to Buyer
or any of its representatives pursuant to this Agreement shall be kept
confidential, and Buyer shall not disclose such information to any Persons
other than the directors, officers, employees, financial advisors, legal
advisors, accountants, consultants and affiliates of Buyer who reasonably need
to have access to the confidential information and who are advised of the
confidential nature of such information but the foregoing obligation of Buyer
shall not (i) relate to any information that (A) is or becomes generally
available other than as a result of unauthorized disclosure by Buyer or by
Persons to whom Buyer has made such information available, (B) is or becomes
available to





                                      -35-
<PAGE>   42
Buyer on a nonconfidential basis from a third party that is not, to Buyer's
knowledge, bound by any other confidentiality agreement with the Trust, or (ii)
prohibit disclosure of any information if required by law, rule, regulation,
court order or other legal or governmental process.

                 Section 5.3      Conduct of Business.  Except for the
transactions contemplated hereby, during the period from the date hereof to the
Second Closing Date, the Trust will, except as otherwise consented to or
approved by Buyer in writing or as expressly permitted or required hereby,
conduct the business of the Trust and its Subsidiaries and engage in
transactions only in the ordinary course of business, and the Trust will not,
except as otherwise approved by Buyer in writing or as expressly permitted or
required hereby:

                          (i)     change any provision of the Trust Declaration
                 or the By-laws of the Trust; or

                          (ii)    except for (A) issuances of Trust Common
                 Shares in consideration for the acquisition of assets by the
                 Trust in bona fide arm's length transactions subject to the
                 limitations set forth in the Trust Declaration, (B) grants of
                 options pursuant to the plans listed on Schedule 3.3(b) in the
                 ordinary course and consistent with past practice, (C)
                 issuances of Trust Common Shares upon the exercising of
                 options granted pursuant to the plans listed on Schedule
                 3.3(b) and (D) redemption of Partnership Units listed on
                 Schedule 3.3(a) for Trust Common Shares, change the authorized
                 or issued number of shares of the Trust or issue or grant any
                 option, warrant, call, commitment, subscription, right to
                 purchase or agreement of any character relating to the
                 authorized or issued capital stock of the Trust, or any
                 securities convertible into such shares (including Partnership
                 Units), or split, combine or reclassify any shares of the
                 capital stock of the Trust or declare, set aside or pay any
                 extraordinary dividend or other distribution (whether in cash,
                 stock or property or any combination thereof) in respect of
                 the capital stock of the Trust, or redeem or otherwise acquire
                 any shares of such capital stock.

                 Section 5.4      No Solicitation of Transactions.  Except as
otherwise contemplated by this Section 5.4, from and after the date hereof
until the earlier of the Second Closing or the termination of this Agreement
pursuant to Article 10, the Trust shall not, directly or indirectly, encourage,
solicit, participate in or initiate discussions or negotiations with, or





                                      -36-
<PAGE>   43
provide any information to, any Person or group (other than the Buyer or any
Affiliate of Buyer) concerning any proposal for a Competing Transaction
otherwise than in compliance with this Agreement.  Neither the Trust nor any
Subsidiary shall directly or indirectly, encourage, solicit, participate in or
initiate discussions or negotiations with or provide information to, any such
Person or group concerning any proposal for an acquisition of all or
substantially all of the business and properties or partnership units or
interests of the Trust or of any Subsidiary, whether by merger, tender offer,
purchase of assets or shares or partnership units or otherwise, otherwise than
in compliance with the provisions of this Section.  The Board of Managers may
take, and disclose to the Trust's shareholders, a position contemplated by
Rules 14d-9 and 14e-2 promulgated under the Exchange Act with respect to any
tender offer for Trust Common Shares, and the Trust and each Subsidiary may,
directly or indirectly, furnish information and access and may participate in
discussions and negotiate with any Person or group concerning any proposal with
respect to a Competing Transaction which the Board of Managers determines in
its good faith judgment, after consultation with the Trust's legal counsel,
that it is prudent to do so in the exercise of its fiduciary obligations.  The
Trust shall notify Buyer orally (within one Business Day) and in writing (as
promptly as practicable) of all of the relevant details relating to all
inquiries and proposals which it or any of its Subsidiaries or of any officer,
Manager, director, employee, investment banker, financial advisor, attorney,
accountant or other representative of the Trust or any Subsidiary, to the
extent of the Trust's knowledge of any such inquiry or proposal, may receive
relating to any Competing Transaction and if such Proposal is in writing, the
Trust shall deliver to Buyer a copy of such inquiry or proposal (within one
Business Day after the receipt of any such inquiry or proposal).  The Trust may
terminate this Agreement, subject to the payment of the fee required under
Article 10, at any time after the third Business Day following notice to Buyer
(a "Notice of Superior Proposal") advising Buyer that the Board of Managers has
received a Superior Proposal and specifying the structure and material terms of
such Superior Proposal, but only if a proposal continues to be a Superior
Proposal in light of any changes that Buyer proposes in the transactions
contemplated hereby and by the Merger Agreement prior to the end of that three
Business Day period.

                 Section 5.5      Notification of Certain Matters.  Each of
Buyer and the Trust shall notify the other party in writing of its discovery of
any matter that would render any of such party's or the other party's
representations and warranties contained herein untrue or incorrect in any
material respect, but the failure of either party to so notify the other party
of the inaccuracy of that other party's representations and warranties does not
constitute a breach of this Agreement.

                 Section 5.6      Provision of Certain Documents.  The Trust
shall, upon reasonable request by Buyer, deliver true and complete copies of
any documents to Buyer within three Business Days after the date of such
request.





                                      -37-
<PAGE>   44
                 Section 5.7      Registration Rights Agreement.  The Trust and
Buyer agree to enter into the Registration Rights Agreement at the Initial
Closing.

                 Section 5.8      Merger Agreement.  The Trust and Buyer agree
to enter into the Merger Agreement at or prior to the date hereof.

                 Section 5.9      Compensation of Chairman of the Board.
Subject to adjustment as described below, the Trust has awarded to Scott A.
Wolstein non-qualified options to purchase 100,000 Trust Common Shares at a
purchase price equal to the closing price of Trust Common Shares on the NYSE on
July 29, 1998, such options to vest on the Second Closing.  Promptly after the
Initial Closing, the Trust will engage an independent compensation consultant
(who shall be reasonably acceptable to Buyer) who shall prepare a proposed
compensation package for Mr. Wolstein.  The Board of Managers (excluding the
Buyer Representatives) shall vote on such proposed compensation and the grant
described above shall be adjusted based upon the recommendation of the
compensation consultant as approved by the Board of Managers (excluding the
Buyer Representatives).


                                   ARTICLE 6

                          CERTAIN ADDITIONAL COVENANTS

                 Section 6.1      Resale.  Buyer acknowledges and agrees that
the Purchased Shares will not, as of the Initial Closing Date, be registered
under the Securities Act or the securities laws of any state and that they may
be sold or otherwise disposed of only in one or more transactions registered
under the Securities Act and, where applicable, such state securities laws or
as to which an exemption from the registration requirements of the Securities
Act and, where applicable, such state securities laws is available.

                 Section 6.2      REIT Status.  From and after the date hereof
until Buyer no longer owns 10% or more of the aggregate number of outstanding
Trust Common Shares, the Trust will elect to be taxed as a REIT in its federal
income tax returns, will comply with all applicable laws, rules and regulations
of the Code relating to a REIT, and will not take any action or fail to take
any action which would, or would reasonably be expected to, alone or in
conjunction with any other factors, result in the loss of its status as a REIT
for federal income tax purposes.

                 Section 6.3      Board Representation; Chairmanship;
Visitation Rights; Voting Agreements.  (a) At the Initial Closing, Scott A.
Wolstein, Robert H. Gidal, Albert T. Adams and James Schoff, shall be appointed
to the Board of Managers (the





                                      -38-
<PAGE>   45
"Buyer Representatives") and shall cause Scott A. Wolstein to be elected
Chairman of the Board of Managers.  The Trust hereby confirms that William
Bricker has agreed not to stand for reelection at the Trust's next annual
meeting of shareholders and to retire from the Board of Managers.  The Trust
also hereby confirms that, upon Mr. Bricker's retirement from the Board of
Managers, the Board of Managers will consist of 10 members.

                 (b)      At any meeting of the shareholders of the Trust
thereafter held to elect Managers, Buyer shall be entitled to nominate three
Managers to the Board of Managers, including the Chairman of the Board of
Managers.  Buyer's right to nominate Managers to the Board of Managers shall
continue, based on its ownership of the Purchased Shares, as follows: (i) so
long as Buyer holds a number of Trust Common Shares that is equal to or greater
than 75% of the number of Buyer Shares, Buyer shall be entitled to nominate
three candidates for the Board of Managers, including the Chairman of the
Board; (ii) so long as Buyer holds a number of Trust Common Shares that is less
than 75%, but equal to or greater than 50%, of the number of Buyer Shares,
Buyer shall be entitled to nominate two candidates for the Board of Managers,
including the Chairman; (iii) so long as Buyer holds a number of Trust Common
Shares that is less than 50%, but equal to or greater than 25%, of the number
of Buyer Shares, Buyer shall be entitled to nominate one candidate for the
Board of Managers; and (iv) if Buyer holds a number of Trust Common Shares that
is less than 25% of the number of Buyer Shares, then Buyer's right to nominate
Managers shall terminate.  The Trust shall cause such nominees to be included
in the slate of nominees recommended by the Board of Managers to the Trust's
shareholders for election as Managers, and the Trust shall use its reasonable
best efforts to cause the election of such nominees.

                 (c)      If any such nominee of Buyer shall cease to serve as
a Manager for any reason, other than by reason of Buyer not being entitled to
nominate a nominee as provided in Section 6.5(b), the Trust shall use its
reasonable best efforts to cause the vacancy resulting thereby to be filled by
a nominee of Buyer, including by taking the actions specified in the last
sentence of Section 6.3(b).

                 (d)      If the Board of Managers of the Trust establishes
committees from time to time, to the extent not precluded by the NYSE, the
nominees of Buyer shall have the right to serve on each such committee in the
same ratio (as closely as practicable) as such nominees represent of the entire
Board of Managers.

                 (e)      So long as Buyer owns a number of Trust Common Shares
that is more than 10% but less than 25% of the number of Buyer Shares, in
addition to the rights granted pursuant to Sections 6.5(a) and (b) above, Buyer
shall have the right to have a representative attend all regular and special
meetings of the Board of Managers of the Trust and of its Subsidiaries and any
committees thereof.  This right shall include the right to receive the same
notice and materials provided to members of the Board of Managers and each
committee thereof.





                                      -39-
<PAGE>   46
                 (f)      On or before the date hereof, the Trust shall have
delivered to Buyer in form and substance satisfactory to Buyer, agreements duly
executed and delivered by each of Realco, ABKB/LaSalle Securities Limited
Partnership, LaSalle Advisors Limited Partnership, The Morgan Stanley Real
Estate Special Situations Fund I, L.P., The Morgan Stanley Real Estate Special
Situations Fund II, L.P., Morgan Stanley Asset Management Inc., and Praedium II
Industrial Associates LLC, or the entities, individuals or accounts represented
by such entities or individuals, pursuant to which each of them agrees to vote
its Trust Common Shares in favor of the transactions contemplated hereby and in
favor of the Buyer Representatives for so long as Buyer's right to nominate
Managers pursuant to this Section 6.4 continues.  Buyer agrees to vote all
Trust Common Shares held by Buyer and its affiliates in favor of the nominees
of each of the entities or individuals listed in the first sentence of this
Section 6.4(f) for so long as the right of each such entity or individual to
nominate Managers continues.

                 Section 6.4      Listing.  The Trust shall cause the Purchased
Shares to be approved for listing on the NYSE (subject to official notice of
issuance) prior to each of the Initial Closing Date, the Second Closing Date
and each Additional Closing Date, as applicable.  In addition, the Trust shall
cause the Trust Common Shares issuable upon conversion of Buyer Preferred
Shares to be approved for listing on the NYSE (subject to official notice of
issuance) prior to each Additional Closing Date, as applicable.

                 Section 6.5      Acknowledgment.  Buyer acknowledges that no
representation set forth in Section 3.11 shall be deemed to be untrue unless
such untruths are, individually or in the aggregate, reasonably expected to
have a Material Adverse Effect or to materially and adversely affect the use or
occupancy (or, if applicable, development) of the affected Trust Property.

                 Section 6.6      Additional Purchased Shares.

                 (a)      From time to time during the period commencing on the
Second Closing Date and ending on the second anniversary of the Second Closing
Date, the Trust shall have the option to sell, and Buyer agrees to purchase,
the additional shares described in Section 6.6(b) (the "Additional Purchased
Shares") for an aggregate purchase price that shall not exceed $200,000,000
(the "Additional Purchase Option") solely for the purpose of funding property
acquisitions approved by a majority of the Managers that are not Affiliates of
the seller of the property or of the assignor that assigned its right to
acquire such property to the Trust, on the terms and subject to the conditions
contained herein.  The Additional Purchase Option shall only be exercisable by
action of a majority of the Managers, excluding the Buyer Representatives.





                                      -40-
<PAGE>   47
                 (b)      The Additional Purchased Shares shall consist of all,
or any combination of the following, as the Trust elects subject to the
provisions of this Section 6.6: (i) Trust Common Shares at a price of $15.50
per share, or (ii) Buyer Preferred Shares at a price of $14.00 per share;
provided, however, that if Buyer would own, as a result of any such sale and
purchase, in excess of 49.9% of the outstanding Trust Common Shares, excluding
Buyer Preferred Shares (the "Threshold Amount"), the Trust may sell only Buyer
Preferred Shares to Buyer, on the terms described in Section 6.6(b)(ii).

                 (c)      The price per share described in Sections 6.6(b)(i)
and 6.6(b)(ii) shall be adjusted as follows: (i) if the average closing price
on the NYSE of one Trust Common Share, determined by reference to The Wall
Street Journal, for the ten trading days immediately preceding the date on
which the Additional Purchase Option is exercised (the "Exercise Date Trailing
Average") is less than $12.12, then the purchase price per Trust Common Share
or Buyer Preferred Share, as applicable, shall be adjusted downward by
multiplying the same by a fraction, the numerator of which shall be the
Exercise Date Trailing Average and the denominator of which shall be $12.12,
and (ii) in the event of any share split, subdivision, combination, merger,
reclassification or share dividend related to the Trust Common Shares or the
Buyer Preferred Shares, as applicable, the price per Trust Common Share or
Buyer Preferred Share shall be adjusted so that the price per share is
multiplied by a fraction the numerator of which is the total number of Trust
Common Shares and Buyer Preferred Shares outstanding on the date hereof and the
denominator is the total number of Trust Common Shares and Buyer Preferred
Shares outstanding on the date of any such share split, subdivision,
combination, merger, reclassification or share dividend.

                 (d)      Buyer shall purchase and pay for, and the Trust shall
deliver, the Additional Purchased Shares in one or more transactions within 14
days after the exercise of the Additional Purchase Option by the Board of
Managers under Section 6.6(a), subject to the satisfaction of the closing
conditions described in this Agreement.

                 Section 6.7      Anti-Dilution.  (a) If Buyer's Beneficial
Ownership of Trust Common Shares falls below forty percent (40%) of the
outstanding Trust Common Shares on a fully diluted basis (the "Forty Percent
Threshold"), Buyer shall have the right to purchase from time to time, and the
Trust hereby agrees to sell from time to time, at a price of $15.50 per Trust
Common Share, a number of Trust Common Shares such that, immediately after such
purchase and giving effect thereto, Buyer's Beneficial Ownership of Trust
Common Shares shall be less than or equal to the Forty Percent Threshold.  The
purchase price of all Trust Common Shares issued pursuant to this Section
6.7(a) shall reduce the Additional Purchase Option on a dollar for dollar
basis.





                                      -41-
<PAGE>   48
                 (b)      If Buyer's Beneficial Ownership of Trust Common
Shares falls below the Forty Percent Threshold after the Additional Purchase
Option has been exhausted or otherwise terminated, then, notwithstanding the
provisions of Section 6.6, Buyer shall have the right (to the extent permitted
by law) to purchase from time to time, in the open market or in one or more
privately negotiated transactions, a number of Trust Common Shares such that,
immediately after such purchase and giving effect thereto, Buyer's Beneficial
Ownership of Trust Common Shares shall be less than or equal to the Forty
Percent Threshold.

                 Section 6.8      No Repurchase Program.  The Trust shall not
engage in any open market repurchases of Trust Common Shares, whether pursuant
to a share repurchase program conducted in accordance with Rule 10b-18
promulgated under the Exchange Act or otherwise, if such repurchase program
would trigger the "poison pill" provisions contained in Article 13(b) of the
Trust Declaration.

                 Section 6.9      Excess Securities Provision.  The Trust shall
cause the Board of Managers to exempt Buyer from the "excess securities"
provision contained in Article 13 of the Trust Declaration, as permitted by
Article 13(h) of the Trust Declaration, for as long as Buyer owns any of the
Purchased Securities, provided that Buyer's Beneficial Ownership of the
Purchased Shares will not, in the opinion of counsel to the Trust (who must be
reasonably acceptable to Buyer), cause the Trust to lose its status as a REIT.
During each December in which Buyer owns any of the Purchased Shares, the Trust
shall certify its compliance with this Section 6.9 and Buyer shall provide
reasonable certification to the Trust that Buyer's Beneficial Ownership of the
Purchased Shares will not cause the Trust to lose its status as a REIT.

                 Section 6.10     Disinterested Managers.  Buyer and its
Affiliates will not engage in any Material Transaction with the Trust without
the prior approval of a majority of the Managers, excluding the Buyer
Representatives (the Managers other than the Buyer Representatives, the
"Disinterested Managers").  Buyer and the Trust agree that the approval of a
majority of the Disinterested Managers shall satisfy the requirements of any
provision of this Agreement requiring the approval of a majority of the
Managers if the transaction requiring such approval would constitute a Material
Transaction.

                 Section 6.11     Standstill.  For a period beginning on the
Initial Closing Date and ending on the third anniversary of the Second Closing
(the "Standstill Period"), Buyer and its Affiliates shall not, without the
prior approval of a majority of the Disinterested Managers:

                 (a)      Directly or indirectly acquire, or agree to acquire,
Beneficial Ownership of Trust Common Shares (or any other voting securities or
securities convertible into, or





                                      -42-
<PAGE>   49
exchangeable or redeemable for, Trust Common Shares) if, as a result of such
acquisition, Buyer and its Affiliates would own in excess of the Forty Percent
Threshold, other than an acquisition of Additional Purchased Shares or any
other acquisition permitted by this Agreement.  Trust Common Shares, and
options to purchase, or securities convertible into, Trust Common Shares
granted to, or purchased upon the exercise of such options or the conversion of
such securities, the Buyer Representatives in their capacities as Managers
shall not considered to be owned by Buyer and its Affiliates for purposes of
determining whether Buyer has exceeded the Forty Percent Threshold.

                 (b)      Form or join or act with any Person as a partnership,
voting trust, syndicate or other group, or otherwise act in concert with any
other Person, for the purpose of acquiring, holding, voting or disposing of
Trust Common Shares, or otherwise become a "group" within the meaning of
Section 13(d)(3) of the Exchange Act.

                 (c)      Solicit proxies or assist or participate in any way
or, directly or indirectly, become a "participant" in a "solicitation" (as such
terms are defined in Regulation 14A under the Exchange Act), or seek to advise
or influence any person or entity with respect to the voting of Trust Common
Shares in connection with any such solicitation, in opposition to the
recommendation of a majority of the Managers with respect to any matter.

                 (d)      Initiate, submit or propose any shareholder proposal
for submission to a vote of the shareholders of the Trust, or request, induce
or attempt to induce any other Person to initiate or propose any such proposal,
or seek to advise or influence any person or entity with respect to the voting
of Trust Common Shares in connection with any proposal, all with respect to the
Trust, in opposition to the recommendation of a majority of the Managers with
respect to any matter.

                 (e)      Directly or indirectly assist, encourage or induce
any Person to bid for or acquire Beneficial Ownership of Trust Common Shares in
excess of five percent (5%) of the outstanding Trust Common Shares, other than
in connection with any sale by Buyer or its Affiliates of Purchased Shares
conducted in accordance with this Agreement, the Registration Rights Agreement
(if applicable) and any applicable Securities Laws.

                 (f)      Take any other action in concert with any other
Person to seek to direct the management or policies of the Trust or otherwise
exercise control over the Trust.

                 (g)      Buyer shall not be deemed to have breached this
Section 6.11 solely as a result of any action taken by any Buyer Representative
solely in his or her capacity as a Manager.





                                      -43-
<PAGE>   50
                 Section 6.12     Funding Prior to Second Closing.

                 (a)      From time to time during the period commencing on the
Initial Closing Date and ending on the earlier of (i) the Second Closing Date,
(ii) the date 180 days after the Initial Closing Date, and (iii) the date this
Agreement is terminated pursuant to Article 10 hereto, the Trust shall have the
option (the "Funding Option") to borrow from Buyer, and Buyer agrees to lend
within 30 days from the date of the exercise of the Funding Option, amounts
that shall not in the aggregate exceed the Remaining Purchase Price, solely for
the purpose of funding the property acquisitions listed on Schedule 6.12.  Each
such acquisition shall be approved by a majority of the Managers that are not
Affiliates of the seller of the property or the assignor of the right to
purchase the property at any time between the Initial Closing Date and the
exercise of the Funding Option.  The Funding Option shall only be exercisable
by action of a majority of the Managers, excluding the Buyer Representatives.

                 (b)      All loans made by Buyer to the Trust pursuant to the
Funding Option shall be on the terms and conditions contained in the promissory
note attached hereto as Exhibit D.  Buyer shall make each such loan within ten
days after the date the applicable Funding Option is exercised in accordance
with Section 6.12(a).  All such loans shall be repaid at the earlier of: (i)
the Second Closing Date, (ii) the date that is 181 days after the Initial
Closing Date, and (iii) within 30 days of the date on which this Agreement is
terminated pursuant to Article 10 hereto.

                 6.13     Transfer of Shares.  During the Standstill Period,
any Purchased Shares transferred by Buyer shall be, in the possession of the
transferee, and the transferee shall be subject to the terms and conditions of
this Agreement and the Registration Rights Agreement, if applicable, including
but not limited to, the provisions of Section 6.11 of this Agreement.

                                   ARTICLE 7

                               CLOSING DELIVERIES

                 Section 7.1      Initial Closing Deliveries.

                 (a)      Trust Deliveries.  At the Initial Closing, the Trust
shall deliver, or cause to be delivered, to Buyer the following:

                          (i)     certificates representing the Initial Shares,
                 bearing the legends described in Section 4.9, free and clear
                 of all Liens (unless created by Buyer or any of its
                 Affiliates), with all necessary stock powers, share transfer
                 and other documentary stamps attached;

                          (ii)    the certificate, dated the Initial Closing
                 Date and validly executed on behalf of the Trust, required by
                 Section 8.1(a);





                                      -44-
<PAGE>   51
                          (iii) resolutions of the Board of Managers, certified
                 by the Secretary of the Trust, authorizing the execution and
                 delivery of this Agreement, the Merger Agreement and the
                 Registration Rights Agreement, and the transactions
                 contemplated hereby and thereby, including the creation and
                 issuance of the Buyer Preferred Shares;

                          (iv)    each of the legal opinions of the Trust's
                 counsel required by Sections 8.1(g) and 8.1(h);

                          (v)     evidence or copies of any consents,
                 approvals, orders, qualifications or waivers required by
                 Section 8.1;

                          (vi)    all other certificates and instruments and
                 documents required pursuant this Agreement to be delivered by
                 the Trust to Buyer at or prior to the Initial Closing;

                          (vii) the Registration Rights Agreement, duly
                 executed on behalf of the Trust;

                          (viii) evidence that the merger contemplated by the
                 Merger Agreement has occurred;

                          (ix)    a supplemental listing application executed
                 by the Trust and the NYSE authorizing the listing of the
                 Initial Shares (subject to official notice of issuance);

                          (x) such other instruments reasonably requested by
                 Buyer as may be necessary or appropriate to confirm or carry
                 out the provisions of this Agreement.

                 (b)      Buyer Deliveries.  At the Initial Closing, Buyer
shall deliver, or cause to be delivered, to the Trust the following:

                          (i) the Initial Purchase Price in immediately
                 available funds;

                          (ii) the certificate, dated the Initial Closing Date
                 and validly executed on behalf of Buyer, required by Section
                 8.2(a);

                          (iii) the Registration Rights Agreement, duly
                 executed on behalf of Buyer;

                          (iv) if not theretofore delivered to the Trust, all
                 other certificates, documents, instruments and writings
                 required pursuant to this Agreement to be delivered by or on
                 behalf of Buyer at or before the Initial Closing;





                                      -45-
<PAGE>   52
                          (v) each of the legal opinions of Buyer's counsel
                 required by Sections 8.2(e) and 8.2(f); and

                          (vi) such other instruments reasonably requested by
                 the Trust as may be necessary or appropriate to confirm or
                 carry out the provisions of this Agreement.

                 Section 7.2      Second Closing Deliveries.

                 (a)      Trust Deliveries.  At the Second Closing, the Trust
shall deliver, or cause to be delivered, to Buyer the following:

                          (i)     certificates representing the Remaining
                 Shares, bearing the legends described in Section 4.9, free and
                 clear of all Liens (unless created by Buyer or any of its
                 Affiliates), with all necessary stock powers, share transfer
                 and other documentary stamps attached;

                          (ii)    the certificate, dated the Second Closing
                 Date and validly executed on behalf of the Trust, required by
                 Section 8.3(a);

                          (iii) a certificate from the Secretary of the Trust
                 stating that the resolutions of the Board of Managers
                 authorizing the execution and delivery of this Agreement, the
                 Merger Agreement and the Registration Rights Agreement, and
                 the transactions contemplated hereby and thereby, remain in
                 full force and effect, and have not been amended, repealed or
                 altered in any way;

                          (iv)    a certificate of the Secretary of the Trust
                 that the shareholders of the Trust approved the issuance of
                 the Purchased Shares and the transactions contemplated by this
                 Agreement and the Merger Agreement at a special meeting of the
                 Trust's shareholders held in accordance with the rules of the
                 NYSE;

                          (v)     each of the legal opinions of the Trust's
                 counsel required by Sections 8.3(c);

                          (vi)    evidence or copies of any consents,
                 approvals, orders, qualifications or waivers required by
                 Section 8.4;

                          (vii) a supplemental listing application executed by
                 the Trust and the NYSE authorizing the listing of the
                 Remaining Shares (subject to official notice of issuance);

                          (viii) all other certificates and instruments and
                 documents required pursuant this Agreement to be delivered by
                 the Trust to Buyer at or prior to the Second Closing; and





                                      -46-
<PAGE>   53
                          (viii) such other instruments reasonably requested by
                 Buyer as may be necessary or appropriate to confirm or carry
                 out the provisions of this Agreement.

                 (b)      Buyer Deliveries.  At the Second Closing, Buyer shall
deliver, or cause to be delivered, to the Trust the following:

                          (i)     the Remaining Purchase Price in immediately
                 available funds;

                          (ii)  the certificate, dated the Second Closing Date
                 and validly executed on behalf of Buyer, required by Section
                 8.4(a);

                          (iii)  all other certificates, documents, instruments
                 and writings required pursuant to this Agreement to be
                 delivered by or on behalf of Buyer at or before the Second
                 Closing;

                          (iv)  each of the legal opinions of Buyer's counsel
                 required by Sections 8.2(e); and

                          (v)  such other instruments reasonably requested by
                 the Trust as may be necessary or appropriate to confirm or
                 carry out the provisions of this Agreement.

                 Section 7.3      Additional Closings.

                 (a)      Trust Deliveries.  At each Additional Closing, the
Trust shall deliver, or cause to be delivered, to Buyer the following:

                          (i) certificates representing the number of
                 Additional Purchased Shares to be purchased at that Additional
                 Closing, bearing the legends described in Section 4.9, free
                 and clear of all Liens (unless created by Buyer or any of its
                 Affiliates), with all necessary stock powers, share transfer
                 and other documentary stamps attached;

                          (ii) the certificate, dated that Additional Closing
                 Date and validly executed on behalf of the Trust, required by
                 Section 8.5;

                          (iii) a certificate from the Secretary of the Trust
                 stating that the resolutions of the Board of Managers
                 authorizing the execution and delivery of this Agreement, the
                 Merger Agreement and the Registration Rights Agreement, and
                 the transactions contemplated hereby and thereby, remain in
                 full force and effect, and have not been amended, repealed or
                 altered in any way;





                                      -47-
<PAGE>   54
                          (iv) evidence or copies of any consents, approvals,
                 orders, qualifications or waivers required by Section 8.5(a);

                          (v)     each of the legal opinions of the Trust's
                 counsel required by Section 8.5(b);

                          (vi)    a supplemental listing application executed
                 by the Trust and the NYSE authorizing the listing of the
                 Additional Purchased Shares to be purchased by Buyer at that
                 Additional Closing (subject to official notice of issuance);

                          (vii) all other certificates and instruments and
                 documents required pursuant to this Agreement to be delivered
                 by the Trust to Buyer at or prior to that Additional Closing;
                 and

                          (viii) such other instruments reasonably requested by
                 Buyer as may be necessary or appropriate to confirm or carry
                 out the provisions of this Agreement with respect to that
                 Additional Closing.

                 (b)      Buyer Deliveries.  At each Additional Closing, Buyer
shall deliver, or cause to be delivered, to the Trust the following:

                          (i) the amount of the purchase price, in immediately
                 available funds, for the Additional Purchased Shares to be
                 delivered at that Additional Closing;

                          (ii) the certificate, dated that Additional Closing
                 Date and validly executed by Buyer, required by Section
                 8.6(a);

                          (iii) each of the legal opinions of Buyer's counsel
                 required by Section 8.6(b);

                          (iv) all other certificates and instruments and
                 documents required pursuant to this Agreement to be delivered
                 by the Buyer to the Trust at or prior to each Additional
                 Closing; and

                          (v) such other instruments reasonably requested by
                 the Trust as may be necessary or appropriate to confirm or
                 carry out the provisions of this Agreement with respect to
                 that Additional Closing.





                                      -48-
<PAGE>   55
                                   ARTICLE 8

                             CONDITIONS TO CLOSINGS

                 Section 8.1      Conditions to Purchase at Initial Closing.
The obligations of Buyer to purchase and pay for the Initial Shares at the
Initial Closing are subject to the satisfaction or waiver of each of the
following conditions precedent:

                 (a)      Representations and Warranties; Covenants.
The representations and warranties of the Trust contained herein that are not
qualified as to materiality shall have been true and correct in all material
respects on and as of the date hereof, and shall be true and correct in all
material respects on and as of the Initial Closing Date with the same effect as
though such representations and warranties had been made on and as of the
Initial Closing Date (except for representations and warranties that speak as
of a specific date or time other than the Initial Closing Date (which need only
be materially true and correct in all respects as of such date or time)), and
the representations and warranties already qualified with respect to
materiality shall have been true and correct in all respects at each such date
without regard to the materiality qualification contained in this Section
8.1(a).  The covenants and agreements of the Trust to be performed on or before
the Initial Closing Date in accordance with this Agreement shall have been duly
performed in all material respects.  The Trust shall have delivered to Buyer at
the Initial Closing a certificate of an appropriate officer in form and
substance satisfactory to Buyer dated the Initial Closing Date to such effect.

                 (b)      No Material Adverse Change.  Since December 31, 1997,
there shall not have been any change, circumstance or event which has had or
would reasonably be expected to have a Material Adverse Effect.

                 (c)      HSR Act. Any waiting period applicable to the
consummation of the transactions contemplated by this Agreement and the Merger
Agreement under the HSR Act shall have expired or been terminated, and no
action shall have been instituted by the United States Department of Justice or
the United States Federal Trade Commission challenging or to enjoin the
consummation of the transactions contemplated hereby, which action shall not
have been withdrawn or terminated, or the Trust and Buyer shall have concluded
that no filing under the HSR Act is required with respect to the transactions
contemplated hereby.

                 (d)      No Limitation.  There shall not be in effect any
order, decree or injunction of a court or agency of competent jurisdiction
which enjoins or prohibits consummation of the transactions contemplated hereby
and there shall be no pending Action which would reasonably be expected to have
a material adverse effect on the ability of the Trust to consummate the actions
contemplated hereby or to issue the Initial Shares.





                                      -49-
<PAGE>   56
                 (e)      Proceedings.  All trust and other proceedings to be
taken by the Trust in connection with the transactions contemplated by this
Agreement and the Merger Agreement and all documents incident thereto shall be
reasonably satisfactory to Buyer and Buyer shall have received all such
counterpart originals or certified or other copies of such documents as it has
reasonably requested.

                 (f)      REIT Status.  The Trust shall have elected to be
taxed as a REIT in each of its federal income tax returns, and shall be in
compliance with all applicable laws, rules and regulations, including the Code,
necessary to permit it to be taxed as a REIT for all tax years since the
Trust's formation.  The Trust shall not have taken any action or have failed to
take any action which would reasonably be expected to, alone or in conjunction
with any other factors, result in the loss of its status as a REIT for federal
income tax purposes.

                 (g)      Opinion of Counsel.  Buyer shall have received a
legal opinion from Liddell, Sapp, Zivley, Hill & LaBoon, L.L.P.,  counsel to
the Trust, dated the Initial Closing Date concerning, among other things, the
Trust's organization, authority, capitalization, SEC filings (excluding
financial and statistical data contained therein), contractual relationships,
compliance with law and other legal matters, and confirming that all shares
issued pursuant to this Agreement will be validly issued, fully paid and
nonassessable, in form and substance reasonably satisfactory to Buyer.

                 (h)      Tax Opinion.  Buyer shall have received the opinion
of Liddell, Sapp, Zivley, Hill & LaBoon, L.L.P., counsel to the Trust, in form
and substance reasonably satisfactory to Buyer, and dated the Initial Closing
Date, that (i) commencing with its initial taxable year ended December 31,
1985, the Trust has met the requirements under the Code for qualification and
taxation as a real estate investment trust and that, after giving effect to the
transactions contemplated hereby, the Trust's proposed method of operation will
enable it to continue to meet the requirements for qualification and taxation
as a real estate investment trust under the Code and (ii) each Subsidiary of
the Trust has been, since its formation, and continues to be, treated for
federal income tax purposes (a) as a partnership, and not as a corporation or
an association taxable as a corporation or (b) as an entity disregarded as
separate from its owner (in the case of (i) and (ii) above with customary
assumptions and qualifications).

                 (i)      The Merger.  The merger contemplated by the Merger
Agreement shall have occurred.

                 Section 8.2      Conditions of Sale at Initial Closing.  The
obligation of the Trust to sell the Initial Shares at the Initial Closing is
subject to the satisfaction or waiver of each of the following conditions
precedent:





                                      -50-
<PAGE>   57
                 (a)      Representations and Warranties; Covenants.  The
representations and warranties of Buyer contained herein that are not qualified
as to materiality shall have been true and correct in all material respects on
and as of the date hereof, and shall be true and correct in all material
respects on and as of the Initial Closing Date with the same effect as though
such representations and warranties had been made on and as of the Initial
Closing Date (except for representations and warranties that speak as of a
specific date or time other than the Initial Closing Date (which need only be
materially true and correct in all material respects as of such date or time),
and the representations and warranties already qualified with respects to
materiality shall have been true and correct in all respect at each such date
without regard to the materiality qualification contained in this Section
8.2(a).  The covenants and agreements of Buyer to be performed on or before the
Initial Closing Date in accordance with this Agreement shall have been duly
performed in all respects.  Buyer shall have delivered to the Trust at the
Initial Closing a certificate of an appropriate officer in form and substance
reasonably satisfactory to the Trust dated the Initial Closing Date to such
effect.

                 (b)      No Limitation.  There shall not be in effect any
order, decree or injunction of a court or agency of competent jurisdiction
which enjoins or prohibits consummation of the transactions contemplated hereby
and there shall be no pending Action which would reasonably be expected to have
a material adverse effect on the ability of Buyer to consummate the
transactions contemplated hereby or to acquire the Initial Shares.

                 (c)      HSR Act. Any waiting period applicable to the
consummation of the transactions contemplated by this Agreement and the Merger
Agreement under the HSR Act shall have expired or been terminated, and no
action shall have been instituted by the United States Department of Justice or
the United States Federal Trade Commission challenging or to enjoin the
consummation of the transactions contemplated hereby, which action shall not
have been withdrawn or terminated, or the Trust and Buyer shall have concluded
that no filing under the HSR Act is required with respect to the transactions
contemplated hereby.

                 (d)      Proceedings.  All corporate and other proceedings to
be taken by Buyer in connection with the transactions contemplated by this
Agreement and the Merger Agreement and all documents incident thereto shall be
reasonably satisfactory in form and substance to the Trust and the Trust shall
have received all such counterpart originals or certified or other copies of
such documents as they may reasonably request.

                 (e)      Opinion of Counsel.  The Trust shall have received a
legal opinion from Baker & Hostetler LLP, counsel to Buyer, dated the Initial
Closing Date,  concerning, among other things, the matters described in Section
4.8, Buyer's organization, authority, capitalization, SEC filings, contractual
relationships, compliance with law and other legal matters, in form and
substance reasonably satisfactory to the Trust.





                                      -51-
<PAGE>   58
                 (f)      Tax Opinion.  The Trust shall have received the
opinion of Baker & Hostetler LLP, counsel for Buyer,  in form and substance
reasonably satisfactory to the Trust, and dated the Initial Closing Date,
concerning the matters described in Section 4.7 and that (i) commencing with
its initial taxable year ended December 31, 1993, Buyer has met the
requirements under the Code for qualification and taxation as a real estate
investment trust and that, after giving effect to the transactions contemplated
hereby, Buyer's proposed method of operation will enable it to continue to meet
the requirements for qualification and taxation as a real estate investment
trust under the Code and (ii) each subsidiary of the Buyer has been, since its
formation, and continues to be, treated for federal income tax purposes (a) as
a partnership, and not as a corporation or an association taxable as a
corporation or (b) as an entity disregarded as separate from its owner (in the
case of (i) and (ii) above with customary assumptions and qualifications).

                 Section 8.3      Conditions to Purchase at Second Closing.
The obligation of Buyer to purchase and pay for the Remaining Shares at the
Second Closing is subject to the satisfaction or waiver of each of the
following conditions precedent:

                 (a)      Conditions Met.  The conditions set forth in Sections
8.1(a)-(f) shall continue to be satisfied or to have been waived in all
respects on and as of the Second Closing Date, with references to the Initial
Closing Date in those conditions considered, for this purpose, to be references
to the Second Closing Date.  The Trust shall have delivered to Buyer at the
Second Closing a certificate of an appropriate officer in form and substance
satisfactory to Buyer dated the Second Closing Date stating that the conditions
contained in Sections 8.1(a)-(f) remain satisfied as of the Second Closing
Date.

                 (b)      Shareholder Approval.  The Trust shall have received
the shareholder approval contemplated by Section 5.1(b) and the Trust shall
have delivered to Buyer a certificate of an appropriate officer in form and
substance satisfactory to Buyer dated the Second Closing Date to that effect.

                 (c)      Opinions of Counsel.  Buyer shall have received each
of the legal opinions required by Section 8.1(g) and 8.1(h), dated the Second
Closing Date, with references to the Initial Closing Date in those Sections and
opinions considered, for this purpose, to be references to the Second Closing
Date.

                 Section 8.4      Conditions of Sale at Second Closing.  The
obligation of the Trust to sell the Remaining Shares at the Second Closing is
subject to satisfaction or waiver of each of the following conditions
precedent:





                                      -52-
<PAGE>   59
                 (a)      Conditions Met.  The conditions set forth in Sections
8.2(a)-(d) shall continue to be satisfied or to have been waived in all
respects on and as of the Second Closing Date, with references to the Initial
Closing Date in those conditions considered, for this purpose, to be references
to the Second Closing Date.  Buyer shall have delivered to the Trust at the
Second Closing a certificate of an appropriate officer in form and substance
satisfactory to the Trust dated the Second Closing Date stating that the
conditions contained in Sections 8.2(a)-(d) remain satisfied as of the Second
Closing Date.

                 (b)      Opinions of Counsel.  The Trust shall have received
each of the legal opinions required by Section 8.1(g) and 8.1(h), dated the
Second Closing Date, with references to the Initial Closing Date in those
Sections and opinions considered, for this purpose, to be references to the
Second Closing Date.

                 Section 8.5      Conditions to Purchase at each Additional
Closing.  The obligation of Buyer to purchase and pay for the Additional
Purchased Shares at each Additional Closing is subject to satisfaction or
waiver of each of the following conditions precedent:

                 (a)      Conditions Met.  The conditions set forth in Sections
8.1(a)-(f) shall continue to be satisfied or to have been waived in all
respects on and as of each Additional Closing Date, with references to the
Initial Closing Date in those conditions considered, for this purpose, to be
references to the applicable Additional Closing Date.  The Trust shall have
delivered to Buyer at each Additional Closing a certificate of an appropriate
officer in form and substance satisfactory to Buyer dated as of each Additional
Closing Date stating that the conditions contained in Sections 8.1(a)-(f)
remain satisfied as of each Additional Closing Date.

                 (b)      Opinions of Counsel.  Buyer shall have received each
of the legal opinions required by Section 8.1(g) and 8.1(h), dated as of each
Additional Closing Date, with references to the Initial Closing Date in those
Sections and opinions considered, for this purpose, to be references to
applicable Additional Closing Date.

                 Section 8.6      Conditions to Sale at each Additional
Closing.  The obligation of the Trust to sell the Additional Purchased Shares
at each Additional Closing is subject to satisfaction or waiver of the
following condition precedent:

                 (a)      Conditions Met.  The conditions set forth in Section
8.2(a)-(d) shall continue to be satisfied or to have been waived in all
respects on and as of each Additional Closing Date, with references to the
Initial Closing Date in those conditions considered, for this purpose, to be
references to applicable Additional Closing Date.  Buyer shall have delivered
to the Trust at each Additional Closing a certificate of an appropriate officer
in form and substance satisfactory to the Trust dated as





                                      -53-
<PAGE>   60
of each Additional Closing Date stating that the conditions contained in
Sections 8.2(a)-(d) remain satisfied as of each Additional Closing Date.

                 (b)      Opinions of Counsel.  The Trust shall have received
each of the legal opinions required by Section 8.1(g) and 8.1(h), dated the
applicable Additional Closing Date, with references to the Initial Closing Date
in those Sections and opinions considered, for this purpose, to be references
to the applicable Additional Closing Date.


                                   ARTICLE 9

                           SURVIVAL; INDEMNIFICATION

                 Section 9.1      Survival.  All representations, warranties
and (except as provided in the last sentence of this Section 9.1) covenants and
agreements of the parties contained herein, including indemnity or
indemnification agreements contained herein, or in any Schedule or Exhibit
hereto, or any certificate, document or other instrument delivered in
connection herewith shall survive until the first anniversary of each Closing.
No Action or proceeding may be brought with respect to any of the
representations and warranties or any of the covenants or agreements which so
survive unless written notice thereof, setting forth in reasonable detail the
claimed misrepresentation or breach of warranty or breach of covenant or
agreement, shall have been delivered to the party alleged to have breached such
representation or warranty or such covenant or agreement on or prior to the
first anniversary of each Closing and the party alleged to have breached such
representation or warranty has not cured the alleged breach within 30 days
after the receipt of such notice.  Those covenants or agreements that
contemplate or may involve actions to be taken or obligations to be in effect
after all Closings contemplated by this Agreement shall survive in accordance
with their terms, and any action or proceeding with respect to any such
covenant or agreement may be brought until the statute of limitations
applicable thereto expires.

                 Section 9.2      Indemnification by Buyer or the Trust.  (a)
Subject to Section 9.1, from and after the Initial Closing Date, Buyer shall
indemnify and hold harmless the Trust, its successors and assigns, from and
against any and all damages, claims, losses, expenses, costs, obligations and
liabilities, including liabilities for all reasonable attorneys' fees and
expenses (including attorney and expert fees and expenses incurred to enforce
the terms of this Agreement) (collectively,  "Loss and Expense") suffered,
directly or indirectly, by the Trust by reason of, or arising out of, (i) any
breach as of the date made or deemed made or required to be true of any
representation or warranty made by Buyer in or pursuant to this Agreement and
the failure to cure such breach within the applicable cure period, or (ii) any
failure by Buyer to perform or fulfill any of its covenants or agreements set
forth herein.





                                      -54-
<PAGE>   61
                 (b)      Subject to Section 9.1, from and after the Initial
Closing Date, the Trust shall indemnify and hold harmless Buyer, its successors
and assigns, from and against any and all Loss and Expense, suffered, directly
or indirectly, by Buyer by reason of, or arising out of, (i) any breach as of
the date made or deemed made or required to be true of any representation or
warranty made by the Trust in or pursuant to this Agreement or in any
certificate delivered pursuant to this Agreement and the failure to cure such
breach within the applicable cure period, or (ii) any failure by the Trust to
perform or fulfill any of its covenants or agreements set forth herein.

                 (c)      Notwithstanding the foregoing, neither Buyer nor the
Trust shall be responsible for any Loss and Expense as provided in paragraphs
(a) and (b), respectively, of this Section 9.2, until the cumulative aggregate
amount of such Loss and Expense suffered by Buyer or the Trust, as the case may
be, exceeds $50,000, in which case Buyer or the Trust, as the case may be,
shall then be liable for all such Loss and Expense.  Except with respect to
third- party claims being defended in good faith or claims for indemnification
with respect to which there exists a good faith dispute, the indemnifying party
shall satisfy its obligations hereunder within 30 days of receipt of a notice
of claim under this Article 9.  The liability of Buyer or the Trust, as
applicable, under this Article 9 and Article 9 of the Merger Agreement,
collectively, shall not exceed $58,000,000.

                 Section 9.3      Third-Party Claims.  If a claim by a third
party is made against a party and if such party intends to seek indemnity with
respect thereto under this Article, such party (the "Indemnified Party") shall
promptly notify the indemnifying party in writing of such claim setting forth
such claim in reasonable detail.  The indemnifying party shall have 10 days
after receipt of such notice to undertake, through counsel of its own choosing
and at its own expense, the settlement or defense thereof, and the Indemnified
Party shall cooperate with it in connection therewith, but the Indemnified
Party may participate in such settlement or defense through counsel chosen by
such Indemnified Party, so long as the fees and expenses of such counsel are
borne by that Indemnified Party.  The Indemnified Party shall not pay or settle
any claim which the indemnifying party is contesting.  Notwithstanding the
foregoing, the Indemnified Party shall have the right to pay or settle any such
claim, but in such event it shall waive any right to indemnity therefor by the
indemnifying party.  If the indemnifying party does not notify the Indemnified
Party within 10 days after the receipt of the Indemnified Party's notice of a
claim of indemnity hereunder that it elects to undertake the defense thereof,
the Indemnified Party shall have the right to contest or compromise the claim
and no such contesting or compromise will constitute a waiver of any right to
indemnity therefor pursuant to this Agreement.





                                      -55-
<PAGE>   62
                                   ARTICLE 10

                                  TERMINATION

                 Section 10.1     Termination.  This Agreement may be
terminated at any time prior to the Second Closing and the Merger Agreement may
be terminated at any time prior to the Initial Closing (provided that a
termination of either this Agreement or the Merger Agreement shall also
terminate the other agreement, but any termination after the Initial Closing
shall not, subject to the repurchase obligation described in Section 10.4,
terminate, rescind or undo the Merger Agreement or the transactions
contemplated thereby by:

                 (a)      the consent of each of the Trust and Buyer;

                 (b)      Buyer (if it is not in breach of any of its
obligations hereunder) in the event of a breach by the Trust of any
representation, warranty, covenant or agreement by the Trust contained in this
Agreement or in the Merger Agreement, which has not been, or cannot be, cured
within 30 days after written notice of such breach is given to the Trust;

                 (c)      the Trust (if it is not in breach of any of its
obligations hereunder) in the event of a breach by Buyer of any representation,
warranty, covenant or agreement by Buyer contained in this Agreement or in the
Merger Agreement which has not been, or cannot be, cured within 30 days after
written notice of such breach is given to Buyer;

                 (d)      the Trust, if terminated in accordance with Section
5.4 so long as the Trust shall have paid or shall contemporaneously pay to
Buyer the Breakup Fee;

                 (e)      either the Trust or Buyer if the Second Closing shall
not have occurred on or prior to the date 180 days after the date of this
Agreement, unless the failure of such occurrence shall be attributable to the
failure of the party seeking to terminate this Agreement to perform or observe
any covenant or agreement set forth herein required to be performed or observed
by such party on or before the Second Closing Date, as applicable; or

                 (f)      Buyer, if the Board of Managers shall have withdrawn,
modified or failed to make or refrained from making its recommendation that the
shareholders of the Trust approve the issuance of the Purchased Shares pursuant
to this Agreement and the Merger Agreement as provided for in Section 3.2(b)
and Section 5.1(b), or if the Board of Managers at any time refuses to
reaffirm, at Buyer's request, such recommendation and its determination to make
such recommendation to the shareholders of the Trust.

                 Section 10.2     Procedure and Effect of Termination.  In the
event of termination of this Agreement by the Trust or Buyer





                                      -56-
<PAGE>   63
pursuant to Section 10.1, written notice thereof shall forthwith be given by
the terminating party to the other party hereto, and this Agreement shall
thereupon be and become void and have no effect, and the transactions
contemplated hereby shall be abandoned without further action by the parties
hereto, except that the provisions of Sections 5.2 (Public Announcements), 10.3
(Expenses), 11.2 (Governing Law), 10.4 (Repurchase Obligation), and 11.4
(Notices) shall survive the termination of this Agreement, and no termination
of this Agreement shall relieve any party hereto of any liability for any
breach of this Agreement.  In addition, the Confidentiality Agreements executed
by each of the parties hereto prior to the date hereof shall survive any
termination of this Agreement in accordance with their terms.

                 Section 10.3     Expenses; Breakup Fee.  (a) Except as set
forth in this Agreement, whether or not the purchase of any Purchased Shares is
consummated, all legal and other costs and expenses incurred in connection with
this Agreement and the transactions contemplated hereby shall be paid by the
party incurring such costs and expenses.

                 (b)      If: (i) this Agreement and the transactions
contemplated hereby shall have been submitted to a vote of the Trust's
shareholders and the shareholders have failed for any reason to approve this
Agreement and the actions contemplated hereby by the requisite vote and Buyer
is not in breach of any of its material obligations hereunder; (ii) Buyer
terminates this Agreement under Section 10.1(b); (iii) the Trust terminates
this Agreement under Section 10.1(d); (iv) Buyer terminates this Agreement
under Section 10.1(f), provided that Buyer is not in material breach of any of
its obligations hereunder; or (v) the Trust fails to perform any of its
material obligations under this Agreement, provided that Buyer is not in
material breach of any of its obligations hereunder; then the Trust shall
immediately make payment to Buyer (by wire transfer) of a fee in the amount of
$3.5 million (the "Breakup Fee").

                 (c)      If the Trust shall terminate this Agreement under
Section 10.1(c) or Buyer shall fail to perform any of its material obligations
at the Initial Closing or the Second Closing, provided that the Trust is not in
material breach of any of its obligations hereunder, then Buyer shall
immediately make payment to the Trust (by wire transfer) of a fee in the amount
of $3.5 million.

                 (d)      From the date this Agreement is terminated under this
Section 10.3 and ending 30 days after such termination: (i) if this Agreement
is terminated under Section 10.3(b), then Buyer shall have the option to
require the Trust to assign, and the Trust agrees to assign, all of the
membership interests of Office Flex I and Office Flex II, each as defined in
the Merger Agreement, to Buyer in exchange for the Merger Shares and in lieu of
the Trust's obligation to repurchase the Merger Shares described in Section
10.4; and (ii) if this Agreement is terminated under Section 10.3(c), then the
Trust shall have the





                                      -57-
<PAGE>   64
option to assign, and Buyer agrees to accept such assignment, all of the
membership interests of Office Flex I and Office Flex II, to Buyer in exchange
for the Merger Shares and in lieu of the Trust's obligation to repurchase the
Merger Shares described in Section 10.4.

                 Section 10.4  Repurchase Obligation.  If this Agreement is
terminated for any reason after the Initial Closing and before the Second
Closing, the Trust shall repurchase, at a price of $15.50 per Trust Common
Share, all Trust Common Shares issued pursuant to this Agreement and the Merger
Agreement by wire transfer of immediately available funds to Buyer within 30
days following such termination against delivery of the certificates
representing such shares, with all necessary stock powers, share transfer and
other documentary stamps attached.  This repurchase obligation shall be in
addition to the fee required to be paid pursuant to Section 10.3.  Further,
each Buyer Representative then on the Board of Managers shall resign
immediately upon Buyer's receipt of all amounts due under this Section 10.4.


                                   ARTICLE 11

                                 MISCELLANEOUS

                 Section 11.1     Counterparts.  This Agreement may be executed
in one or more counterparts, all of which shall be considered one and the same
agreement, and shall become effective when one or more counterparts have been
signed by each party hereto and delivered to the other party.  Copies of
executed counterparts transmitted by telecopy, telefax or other electronic
transmission service shall be considered original executed counterparts for
purposes of this Section, provided receipt of copies of such counterparts is
confirmed.

                 Section 11.2     Governing Law.  THIS AGREEMENT SHALL BE
GOVERNED BY AND CONSTRUED IN ACCORDANCE THE LAWS OF THE STATE OF TEXAS WITHOUT
REFERENCE TO THE CHOICE OF LAW PRINCIPLES THEREOF.

                 Section 11.3     Jurisdiction.  Each party to this Agreement
hereby irrevocably agrees that any legal action or proceeding arising out of or
relating to this Agreement or any agreements or transactions contemplated
hereby may be brought only in a federal district court of the United States of
America and hereby expressly submits to the personal jurisdiction and venue of
any such court of proper jurisdiction for the purposes thereof and expressly
waives any claim of improper venue and any claim that such court is an
inconvenient forum.  TO THE EXTENT NOT PROHIBITED BY APPLICABLE LAW WHICH
CANNOT BE WAIVED, EACH PARTY HEREBY WAIVES, AND COVENANTS THAT IT WILL NOT
ASSERT (WHETHER AS PLAINTIFF, DEFENDANT OR OTHERWISE), ANY RIGHT TO TRIAL BY
JURY IN ANY FORUM IN RESPECT OF ANY ISSUE, CLAIM, DEMAND, ACTION, OR CAUSE OF
ACTION ARISING OUT OF OR BASED UPON





                                      -58-
<PAGE>   65
THIS AGREEMENT OR THE SUBJECT MATTER HEREOF, IN EACH CASE WHETHER NOW EXISTING
OR HEREAFTER ARISING OR WHETHER IN CONTRACT OR TORT OR OTHERWISE.

                 Section 11.4     Entire Agreement.  This Agreement (including
the agreements incorporated herein) and the Schedules and Exhibits hereto
contain the entire agreement between the parties with respect to the subject
matter hereof and there are no agreements, understandings, representations or
warranties between the parties other than those set forth or referred to
herein.  This Agreement is not intended to confer upon any Person not a party
hereto (and their successors and assigns) any rights or remedies hereunder.

                 Section 11.5     Notices.  All notices and other
communications hereunder shall be sufficiently given for all purposes hereunder
if in writing and delivered personally, sent by documented overnight delivery
service or, to the extent receipt is confirmed, telecopy, telefax or other
electronic transmission service to the appropriate address or number as set
forth below, unless and until either of such parties notifies the other in
accordance with this section of a change of address or change of telecopy
number:

         If to Buyer:             Developers Diversified
                                  Realty Corporation
                                  34555 Chagrin Blvd.
                                  Moreland Hills, Ohio 44022
                                  Attention: Scott A. Wolstein
                                  Telecopy Number: (440) 247-0434

         with a copy to:          Baker & Hostetler LLP
                                  3200 National City Center
                                  1900 East 9th Street
                                  Cleveland, Ohio 44114-3485
                                  Attention: Albert T. Adams
                                  Telecopy Number: (216) 696-0740

         If to the Trust:         American Industrial Properties REIT
                                  6210 North Beltline, Suite 170
                                  Irving, Texas 75063
                                  Attention: Charles W. Wolcott
                                  Telecopy Number: (972) 756-0704

         with a copy to:          Liddell, Sapp, Zivley, Hill
                                     & LaBoon, L.L.P.
                                  2001 Ross Avenue, Suite 3000
                                  Dallas, Texas 75201
                                  Attention: Bryan L. Goolsby
                                  Telecopy Number: (214) 849-5599

                 Section 11.6     Successors and Assigns.  This Agreement shall
be binding upon and inure to the benefit of the parties hereto and their
respective successors and permitted assigns, but





                                      -59-
<PAGE>   66
neither this Agreement nor any of the rights, interests or obligations
hereunder may be assigned by either of the parties hereto without the prior
written consent of the other party.

                 Section 11.7     Amendments and Waivers.  This Agreement may
not be modified or amended except by an instrument in writing signed by the
party against whom enforcement of any such modification or amendment is sought.
Either party hereto may, only by an instrument in writing, waive compliance by
the other party hereto with any term or provision hereof on the part of such
other party hereto to be performed or complied with.  The waiver by any party
hereto of a breach of any term or provision hereof shall not be construed as a
waiver of any subsequent breach thereof.

                 Section 11.8     Interpretation; Absence of Presumption.  (a)
For the purposes hereof, (i) words in the singular shall be held to include the
plural and vice versa and words of one gender shall be held to include the
other gender as the context requires, (ii) the terms "hereof," "herein," and
"herewith" and words of similar import shall, unless otherwise stated, be
construed to refer to this Agreement as a whole (including all of the Schedules
and Exhibits hereto) and not to any particular provision of this Agreement, and
Article, Section, paragraph, Exhibit and Schedule references are to the
Articles, Sections, paragraphs, Exhibits and Schedules to this Agreement unless
otherwise specified, (iii) the word "including" and words of similar import
when used in this Agreement shall mean "including, without limitation," unless
otherwise specified, and (iv) the word "or" shall not be exclusive.

                 (b)      This Agreement will be construed without regard to
any presumption or rule requiring construction or interpretation against the
party drafting or causing any instrument to be drafted.

                 Section 11.9     Severability.  Any provision hereof which is
invalid or unenforceable shall be ineffective to the extent of such invalidity
or unenforceability then such invalid or unenforceable provision shall be
revised by a court of competent jurisdiction to make that provision valid or
enforceable.

                 Section 11.10  Further Assurances.  The Trust and Buyer agree
that, from time to time, whether before, at or after the Initial Closing Date,
each of them will execute and deliver such further instruments and take such
other actions as may be necessary to carry out the purposes and intents hereof.

                 Section 11.11    Specific Performance.  Buyer and the Trust
each acknowledge that, in view of the uniqueness of the Purchased Shares and
the properties to be acquired by the Trust pursuant to the Merger Agreement,
the parties hereto would not have an adequate remedy at law for money damages
if this Agreement were not performed in accordance with its terms, and
therefore agree that the parties hereto shall be entitled to specific
enforcement of the terms hereof in addition to any other remedy to which the
parties hereto be entitled at law or in equity.





                                      -60-
<PAGE>   67
                 IN WITNESS WHEREOF, this Agreement has been signed by or on
behalf of each of the parties hereto as of the date first above written.

                                  BUYER:

                                  DEVELOPERS DIVERSIFIED REALTY
                                  CORPORATION, an Ohio corporation



                                  By: /s/ Scott A. Wolstein
                                     -----------------------------------
                                  Name: Scott A. Wolstein
                                       ---------------------------------
                                  Title: President
                                        --------------------------------
                                  
                                  
                                  THE TRUST:
                                  
                                  AMERICAN INDUSTRIAL PROPERTIES
                                  REIT, a Texas real estate
                                  investment trust



                                  By: /s/ Charles W. Wolcott
                                     -----------------------------------
                                  Name: Charles W. Wolcott
                                       ---------------------------------
                                  Title: President & CEO
                                        --------------------------------






<PAGE>   1
                                                                    EXHIBIT 10.2


                             DEMAND PROMISSORY NOTE


$6,532,5254.34                                                     July 30, 1998
                                                                   Dallas, Texas


         FOR VALUE RECEIVED, the undersigned, AMERICAN INDUSTRIAL PROPERTIES
REIT, a Texas real estate investment trust ("Maker"), hereby promises to pay to
the order of DEVELOPERS DIVERSIFIED REALTY CORPORATION, an Ohio corporation
("Payee"), the principal amount of SIX MILLION FIVE HUNDRED THRITY-TWO THOUSAND
FIVE HUNDRED TWENTY-FIVE DOLLARS AND 34/100 ($6,532,525.34), together with
interest upon the outstanding balance of the principal amount hereof at a rate
of interest of ten and one-quarter percent (10.25%) per annum. The principal of
and interest on this Demand Promissory Note are payable as follows: (a) accrued
and unpaid interest only on the outstanding principal balance of this Demand
Promissory Note shall be paid quarterly on the first day of each November,
February, May and August, commencing on November 1, 1998, until the principal
balance hereof is paid in full; and (b) the entire outstanding balance of the
principal hereof, together with all accrued and unpaid interest thereon, shall
be due and payable on the thirtieth calendar day following a demand by Payee.
Both principal and interest are payable in lawful money of the United States of
America to Payee at 34255 Chagrin Boulevard, Moreland Hills, Ohio 44022 or at
such other address as Payee may designate in writing from time to time to Maker,
in immediately available funds.

         Maker shall have the privilege of prepaying all or any part of the
amounts due under this Demand Promissory Note at any time and from time to time
without notice or any prepayment penalty. Any prepayment shall first be applied
to accrued but unpaid interest and thereafter applied to the unpaid principal
balance hereof.

         The invalidity or unenforceability of any term or provision of this
Demand Promissory Note, or the application of such term or provision to any
person or circumstance, shall not impair or affect the remainder of this Demand
Promissory Note and its application to other persons and circumstances and the
remaining terms and provisions hereof shall not be invalid, but shall remain in
full force and effect.

         This Demand Promissory Note shall be governed by and construed in
accordance with the laws of the State of Texas.

         This Demand Promissory Note has been executed at Dallas, Dallas County,
Texas, as of the date first above written.

                                       AMERICAN INDUSTRIAL PROPERTIES REIT,
                                       a Texas real estate investment trust


                                       By: /s/ Marc A. Simpson
                                           -------------------------------------
                                       Name: Marc A. Simpson
                                             -----------------------------------
                                       Title: Senior Vice President
                                              ----------------------------------

<PAGE>   1
                                                                    EXHIBIT 10.3




           SECOND AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT

                 This Second Amended and Restated Registration Rights Agreement
(the "Agreement") is made and entered into as of July 30, 1998, by and among
American Industrial Properties REIT, a Texas real estate investment trust (the
"Company"), and MS Real Estate Special Situations, Inc., a Delaware corporation
("MSRE") and Morgan Stanley Asset Management Inc., a Delaware corporation
("MSAM"), acting as agent and attorney-in-fact on behalf of the clients listed
on Schedule A hereto (the "MSAM Purchasers" and, together with MSRE, the
"Purchasers").


                                  WITNESSETH:

                 WHEREAS, pursuant to that certain Common Share Purchase
Agreement dated as of June 20, 1997, among the Company, MSRE and MSAM, as agent
for the MSAM Purchasers (the "Purchase Agreement"), the Purchasers, severally
and not jointly, purchased 8,163,265 Common Shares (the "Shares") of the
Company (subject to the Share Ownership Limited described in the Purchase
Agreement);

                 WHEREAS, the Company and the Purchasers entered into
Registration Rights Agreements dated as of July 8, 1997 and January 29, 1998
(the "Prior Registration Rights Agreement");

                 WHEREAS, the Company is entering into a Share Purchase
Agreement, an Agreement and Plan of Merger and a Registration Rights Agreement
on the date hereof with Developers Diversified Realty Corporation ("DDR"); and

                 WHEREAS, to enable the Company to enter into such agreements
with DDR, the Purchasers have agreed to amend the registration rights
previously granted to the Purchasers  by the Company;

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

         1.      Definitions.

                 As used in this Agreement, the following capitalized terms
shall have the following meanings:

                 Closing Date: The closing date as defined in the Purchase
Agreement.

                 Common Shares: The common shares of beneficial interest, $0.10
par value per share, of the Company.



                                      1
<PAGE>   2
                 Exchange Act: The Securities Exchange Act of 1934, as amended
from time to time.

                 Participating Purchasers: With respect to any Registration
Statement, any Purchasers holding any Registrable Securities covered by such
Registration Statement.

                 Person: An individual, partnership,  corporation, limited
liability company, trust or unincorporated organization, or a government or
agency or political subdivision thereof.

                 Preemptive Rights: As defined in the Purchase Agreement.

                 Prospectus: The prospectus included in any Registration
Statement, as amended or supplemented by any prospectus supplement with respect
to the terms of the offering of any portion of the Registrable Securities
covered by such Registration Statement and by all other amendments and
supplements to the prospectus, including post-effective amendments and all
material incorporated by reference in such prospectus.

                 Purchase Agreement: As defined in the Recitals to this
Agreement.

                 Purchasers: See Section 2(b) hereof.

                 Registrable Securities: (a) The Shares, (b) any securities
issued or issuable with respect to the Shares by way of share dividend or share
split or in connection with a combination of shares, recapitalization, merger,
consolidation or other reorganization or otherwise, and (c) any additional
Common Shares of the Company purchased by any Purchaser pursuant to the
exercise of Preemptive Rights.  Any Registrable Security will cease to be a
Registrable Security when (i) a registration statement covering such
Registrable Security has been declared effective by the SEC and the Registrable
Security has been disposed of pursuant to such effective registration
statement, (ii) the Registrable Security is sold under circumstances in which
all of the applicable conditions of Rule l44 (or any similar provisions then in
force) under the Securities Act are met, or (iii) the Registrable Security has
been otherwise transferred, the Company has delivered a new certificate or
other evidence of ownership for it not bearing a legend restricting further
transfer, and it may be resold without subsequent registration under the
Securities Act.

                 Registration Expenses: See Section 5 hereof.

                 Registration Statement: The Registration Statement of the
Company that covers any of the Registrable Securities pursuant to the
provisions of this Agreement, including the Prospectus included therein, all
amendments and supplements to such Registration Statement, including
post-effective amendments, all exhibits and all material incorporated by
reference in such Registration Statement.

                 Requesting Purchasers: Any one or more Purchasers holding
Registrable Securities representing in the aggregate not less than 25% of the
aggregate Registrable Securities outstanding.





                                       2
<PAGE>   3
                 SEC: The Securities and Exchange Commission or any successor
entity.

                 Securities Act: The Securities Act of 1933, as amended from
time to time.

                 Share Ownership Limitation: The limitation on ownership
contained in Section 2.4 of the Purchase Agreement.

                 Shares: As defined in the Recitals to this Agreement.

                 Shelf Registration: See Section 2(a) hereof.

                 Underwritten Registration or Underwritten Offering: A
registration in which securities of the Company are sold to an underwriter for
reoffering to the public.

         2.      Registration Rights.

                 (a)      Shelf Registration.  Upon the written request of one
or more Requesting Purchasers, the Company will file a "shelf" registration
statement on any appropriate form pursuant to Rule 415 (or similar rule that
may be adopted by the SEC) under the Securities Act (a "Shelf Registration"),
which Shelf Registration will cover (i) the Registrable Securities that the
Company has been so requested to register by the Requesting Purchasers and (ii)
all other Registrable Securities that the Company has been requested to
register by any other Purchasers by written request given to the Company within
15 days after the Company's giving of written notice of the Requesting
Purchasers' requested registration.

                 The Company hereby agrees to file such registration statement
as promptly as practicable following the request therefor, and in any event
within 60 days following the date such request is received by the Company, and
thereafter to use its commercially reasonable efforts to cause such Shelf
Registration to become effective and thereafter to keep it continuously
effective, and to prevent the happening of any event of the kind described in
Section 4(c)(3), (4), (5) or (6) hereof that requires the Company to give
notice pursuant to the last paragraph of Section 4 hereof, for a period
terminating on the third year anniversary of the date on which the SEC declares
the Shelf Registration effective, or such shorter period as shall terminate on
the date on which all the Registrable Securities covered by the Shelf
Registration have been sold pursuant to such Shelf Registration.  The Company
shall be obligated to file only one Shelf Registration and shall not be
obligated to file a Shelf Registration if three Demand Registrations
(hereinafter defined) have been effected under Section 2(b).

         The Company further agrees to promptly supplement or make amendments
to the Shelf Registration, if required by the rules, regulations or
instructions applicable to the registration form utilized by the Company or by
the Securities Act or rules and regulations thereunder for shelf registration
or if requested by Participating Purchasers holding in the aggregate in excess
of 50% of the Registrable Securities covered by the Shelf Registration or any
underwriter of the Registrable Securities.





                                       3
<PAGE>   4
         If Participating Purchasers holding in the aggregate in excess of 50%
of the Registrable Securities covered by the Shelf Registration so elect, the
offering of Registrable Securities pursuant to such registration shall be in
the form of an Underwritten Offering.

                 (b)      Demand Registration.  At any time during the five
year period following the Closing Date, one or more Requesting Purchasers may
make a written request (the "Demand Notice") for registration under the
Securities Act (a "Demand Registration") of the Registrable Securities held by
such Requesting Purchasers. The Demand Notice will specify the number of shares
of Registrable Securities proposed to be sold and will also specify the
intended method of disposition thereof.  Following receipt of a Demand Notice
from the Requesting Purchasers, the Company promptly will give written notice
of the requested registration to all other Purchasers, and will thereafter file
a registration statement on any appropriate form which will cover (i) the
Registrable Securities that the Company has been so requested to register by
such Requesting Purchasers and (ii) all other Registrable Securities that the
Company has been requested to register by any other Purchasers by written
request given to the Company within 15 days after the Company's giving of
written notice of the Requesting Purchasers' requested registration.

         Unless each Participating Holder shall consent in writing, no party
(including the Company) other than any Purchaser, DDR, USAA Real Estate Company
("Realco"), Praedium II Industrial Associates LLC ("Praedium"), LaSalle
Advisors Limited Partnership acting as agent for and on behalf of certain
clients ("LaSalle"), or ABKB/LaSalle Securities Limited Partnership ("ABKB" and
together with LaSalle, the "LaSalle Entities") shall be permitted to offer
securities under any such Demand Registration.  The Company shall not be
required to effect more than three Demand Registrations under this Section
2(b).  A registration requested pursuant to this Section 2(b) will not be
deemed to have been effected (and it shall not count as one of the three Demand
Registrations) unless the Registration Statement relating thereto has become
effective under the Securities Act; provided, however that if, after such
Registration Statement has become effective, the offering of the Registrable
Securities pursuant to such registration is interfered with by any stop order,
injunction or other order or requirement of the SEC or any other governmental
agency or court, such registration will be deemed not to have been effected
(and it shall not count as one of the three Demand Registrations).
Participating Purchasers holding in excess of 50% of the Registrable Securities
covered by a Demand Registration may at any time prior to the effective date of
the Registration Statement relating to such registration revoke a Demand Notice
by providing a written notice to the Company (in which case such Demand
Registration shall not count as one of the three Demand Registrations).

         If Participating Purchasers holding in the aggregate in excess of 50%
of the Registrable Securities covered by the Demand Registration so elect, the
offering of Registrable Securities pursuant to such registration shall be in
the form of an Underwritten Offering.  If the managing underwriter or
underwriters of such offering advise the Company and the Participating
Purchasers in writing that in their opinion the number of shares of Registrable
Securities and shares of DDR,





                                       4
<PAGE>   5
Realco, Praedium or the LaSalle Entities, if any,  requested to be included in
such offering is sufficiently large to materially and adversely affect the
success of such offering, the Company will include in such registration the
aggregate number of Registrable Securities and shares of DDR, Realco, Praedium
or the LaSalle Entities, if any, requested to be included,  which in the
opinion of such managing underwriter or underwriters can be sold without any
such material adverse effect; provided, however, that no Registrable Securities
or shares of DDR, Realco, Praedium or the LaSalle Entities, if any, may be
excluded before all shares proposed to be sold by other parties, including the
Company, have been excluded.  If  any Registrable Securities are excluded, such
registration shall not count as one of the three Demand Registrations.  If the
amount of Registrable Securities proposed to be registered hereunder are
required to be excluded pursuant to this paragraph, the number of Registrable
Securities of each Participating Purchaser and the number of shares of DDR,
Realco, Praedium or the LaSalle Entities, if any, to be included in such
Registration shall be reduced pro rata (according to the total number of
Registrable Securities or shares, as the case may be, beneficially owned by
each such holder), to the extent necessary to reduce the total amount necessary
to be included in the Offering to the amount recommended by such managing
underwriter or underwriters.

         No registration pursuant to a request or requests referred to in this
subsection 2(b) shall be deemed to be a Shelf Registration.

                 (c)      Incidental Registration.  If at any time during the
five year period following the Closing Date, the Company proposes to file a
registration statement under the Securities Act (other than in connection with
a Registration Statement on Form S-4 or S-8, or any form that is substituting
therefor or is a successor thereto) with respect to an offering of any class of
security by the Company for its own account or for the account of any of its
security holders, then the Company shall give written notice of such proposed
filing to all Purchasers as soon as practicable (but in no event less than 30
days before the anticipated filing date), and such notice shall (i) offer each
Purchaser the opportunity to register such number of Registrable Securities as
it may request and (ii) describe such securities and specify the form and
manner and other relevant facts involved in such proposed registration
(including, without limitation, (x) whether or not such registration will be in
connection with an Underwritten Offering and, if so, the identity of the
managing underwriter and whether such Underwritten Offering will be pursuant to
a "best efforts" or "firm commitment" underwriting and (y) the price (net of
any underwriting commissions, discounts and the like) at which the Registrable
Securities are reasonably expected to be sold, if such disclosure is acceptable
to the managing underwriter). Each Purchaser shall advise the Company in
writing within 20 days after the date of receipt of such notice from the
Company of the number of Registrable Securities for which registration is
requested.  The Company shall include in such Registration Statement all such
Registrable Securities so requested to be included therein, and, if such
registration is an Underwritten Registration, the Company shall use its
commercially reasonable efforts to cause the managing underwriter or
underwriters to permit the Registrable Securities requested to be included in
the registration statement for such offering to be included (on the same terms
and conditions as similar securities of the Company included therein to the
extent appropriate); provided, however, that if the managing underwriter or
underwriters of such offering deliver a written opinion to each





                                       5
<PAGE>   6
Participating Purchaser that either because of (i) the kind of securities which
such Purchasers, the Company, or any other Persons intend to include in such
offering or (ii) the size of the offering which such Purchasers, the Company,
or such other Persons intend to make, the success of the offering would be
materially and adversely affected by inclusion of the Registrable Securities
requested to be included, then (A) in the event that the size of the offering
is the basis of such managing underwriter's opinion, the amount of securities
to be offered for the account of each Participating Purchaser and other holders
registering securities of the Company pursuant to similar incidental
registration rights shall be reduced pro rata (according to the Registrable
Securities beneficially owned by each such holder) to the extent necessary to
reduce the total amount of securities to be included in such offering to the
amount recommended by such managing underwriter or underwriters; and (B) in the
event that the combination of securities to be offered is the basis of such
managing underwriter's opinion, (x) the Registrable Securities and other
securities to be included in such offering shall be reduced as described in
clause (A) above or, (y) if the actions described in clause (A) would, in the
judgment of the managing underwriter and pursuant to a written opinion
delivered to the Participating Purchasers, be insufficient to substantially
eliminate the adverse effect that inclusion of the Registrable Securities
requested to be included would have on such offering, such Registrable
Securities will be excluded from such offering.  Notwithstanding the foregoing,
if the Purchasers exercise an incidental registration in connection with DDR's
or Realco's or the Morgan Entities' or LaSalle Entities' demand registration
rights, then the managing underwriter's cutback provision under the demand
registration right set forth in Section 2(b) shall govern with respect to the
Participating Purchasers and not the managing underwriter's cutback provision
in this Section 2(c).

         No registration pursuant to a request or requests referred to in this
subsection 2(c) shall be deemed to be a Shelf Registration.

         3.      Hold-Back Agreements.

                 (a)      Restrictions on Public Sale by Holder of Registrable
Securities. Each Purchaser agrees, if reasonably requested by the managing
underwriters in an Underwritten Offering, not to effect any public sale or
distribution of securities of the Company of the same class as the securities
included in the Registration Statement relating to such Underwritten Offering,
including a sale pursuant to Rule 144 under the Securities Act (except as part
of such Underwritten Offering), during the 10-day period prior to the filing of
such Registration Statement, and during the 90-day period beginning on the
closing date of each Underwritten Offering made pursuant to such Registration
Statement, to the extent timely notified in writing by the Company or the
managing underwriters.

                 (b)      Restrictions on Sale of Securities by the Company.
The Company agrees not to effect any public sale or distribution of any
securities similar to those being registered, or any securities convertible
into or exchangeable or exercisable for such securities (except pursuant to a
registration statement on Form S-4 or S-8, or any substitute form that may be
adopted by the SEC) during the ten days prior to the filing of a registration
statement with respect to an Underwritten





                                       6
<PAGE>   7
Offering, and during the 90-day period beginning on the effective date of such
Registration Statement (except as part of such registration statement (x) where
each Purchaser participating in such registration statement consents, (y) where
any Purchasers are participating in such registration statement pursuant to
Section 2(c) hereof, such registration statement was filed by the Company with
respect to the sale of securities by the Company, and no Purchasers are
simultaneously participating in a registration statement pursuant to Section
2(b) hereof), or (z) with respect to DDR, Realco, Praedium or the LaSalle
Entities, if such parties are participating in a Demand Registration pursuant
to Section 2(b) hereof), or the commencement of a public distribution of
Registrable Securities pursuant to such registration statement.

         4.      Registration Procedures.  In connection with the Company's
registration obligations pursuant to Section 2 hereof, the Company will use its
commercially reasonable efforts to effect such registration to permit the sale
of such Registrable Securities in accordance with the intended method or
methods of distribution thereof, and pursuant thereto the Company will use
commercially reasonable efforts to as expeditiously as possible:

                 (a)      prepare and file with the SEC, as soon as
practicable, and in any event within 60 days from the date of request, a
Registration Statement relating to the applicable registration on any
appropriate form under the Securities Act, which forms shall be available for
the sale of the Registrable Securities in accordance with the intended method
or methods of distribution thereof and shall include all financial statements
of the Company, and use its commercially reasonable efforts to cause such
Registration Statement to become effective; provided that before filing a
Registration Statement or Prospectus or any amendments or supplements thereto,
including documents incorporated by reference after the initial filing of the
Registration Statement, the Company will furnish each Participating Purchaser
and the underwriters, if any, copies of all such documents proposed to be
filed, which documents will be subject to the review of the Participating
Purchasers and the underwriters, if any, and the Company will not file any
Registration Statement or amendment thereto or any Prospectus or any supplement
thereto (including such documents incorporated by reference) to which
Participating Purchasers holding in the aggregate in excess of 50% of the
Registrable Securities covered by such Registration Statement or the
underwriters, if any, shall reasonably object (except in the case of a filing
pursuant to Section 2(c) hereof);

                 (b)      prepare and file with the SEC such amendments and
post-effective amendments to the Registration Statement as may be necessary to
keep the Registration Statement effective for the applicable period, or such
shorter period, which will terminate when all Registrable Securities included
in such Registration Statement have been sold; cause the Prospectus to be
supplemented by any required Prospectus supplement, and as so supplemented to
be filed pursuant to Rule 424 under the Securities Act; and comply with the
provisions of all securities included in such Registration Statement during the
applicable period in accordance with the intended method or methods of
distribution by the sellers thereof set forth in such Registration Statement or
supplement to the Prospectus; the Company shall not be deemed to have used
commercially reasonable efforts to keep a Registration Statement effective
during the applicable period if it voluntarily takes any action that would
result in the Purchasers not being able to sell their





                                       7
<PAGE>   8
Registrable Securities during that period unless such action is required under
applicable law; provided that the foregoing shall not apply to actions taken by
the Company in good faith and for valid business reasons, including without
limitation the acquisition or divestiture of assets, so long as the Company
promptly thereafter complies with the requirements of Section 4(k) hereof, if
applicable;

                 (c)      notify each Participating Purchaser and the managing
underwriters, if any, promptly (and in no event more than three days after the
occurrence of any of the following events), and (if requested by any such
Person) confirm such advice in writing, (l) when the Prospectus or any
Prospectus supplement or post-effective amendment has been filed, and, with
respect to the Registration Statement or any post-effective amendment, when the
same has become effective, (2) of any request by the SEC for amendments or
supplements to the Registration Statement or the Prospectus or for additional
information, (3) of the issuance by the SEC of any stop order suspending the
effectiveness of the Registration Statement or the initiation of any
proceedings for that purpose, (4) if at any time the representations and
warranties of the Company contemplated by paragraph (m) below cease to be true
and correct, (5) of the receipt by the Company of any notification with respect
to the suspension of the qualification of the Registrable Securities for sale
in any jurisdiction or the initiation or threatening of any proceeding for such
purpose and (6) of the happening of any event which makes any statement made in
the Registration Statement, the Prospectus or any document incorporated therein
by reference untrue or which requires the making of any changes in the
Registration Statement, the Prospectus or any document incorporated therein by
reference in order to make the statements therein not misleading;

                 (d)      obtain the withdrawal of any order suspending the
effectiveness of the Registration Statement at the earliest possible moment;

                 (e)      if reasonably requested by the managing underwriter
or underwriters or by Participating Purchasers holding in the aggregate in
excess of 50% of the Registrable Securities covered by the Registration
Statement, promptly incorporate in a Prospectus supplement or post-effective
amendment such information as the managing underwriters and such Participating
Purchasers agree should be included therein relating to the sale of the
Registrable Securities, including, without limitation, information with respect
to the number of Registrable Securities being sold to such underwriters, the
purchase price being paid therefor by such underwriters and with respect to any
other terms of the Underwritten (or best efforts underwritten) Offering of the
Registrable Securities to be sold in such offering; and make all required
filings of such Prospectus supplement or post-effective amendment as soon as
notified of the matters to be incorporated in such Prospectus supplement or
post-effective amendment;

                 (f)      furnish to each Participating Purchaser and each
managing underwriter, if any, without charge, at least one signed copy of the
Registration Statement and any post-effective amendment thereto, including
financial statements and schedules, all documents incorporated therein by
reference and all exhibits (including those incorporated by reference);





                                       8
<PAGE>   9
                 (g)      deliver to each Participating Purchaser and the
underwriters, if any, without charge, as many copies of the Prospectus
(including each preliminary prospectus) and any amendment or supplement thereto
as such Persons may reasonably request; the Company consents to the use of the
Prospectus or any amendment or supplement thereto by the Participating
Purchasers and the underwriters, if any, in connection with the offering and
sale of the Registrable Securities covered by the Prospectus or any amendment
or supplement thereto;

                 (h)      prior to any public offering of Registrable
Securities, register or qualify or cooperate with each Participating Purchaser,
the underwriters, if any, and their respective counsel in connection with the
registration or qualification of such Registrable Securities for offer and sale
under the securities or blue sky laws of such jurisdictions as any
Participating Purchaser or any underwriter reasonably requests in writing and
do any and all other acts or things necessary or advisable to enable the
disposition in such jurisdictions of the Registrable Securities covered by the
Registration Statement;

                 (i)      cooperate with the Participating Purchasers and the
managing underwriters, if any, to facilitate the timely preparation and
delivery of certificates representing Registrable Securities to be sold and not
bearing any restrictive legends (except as reasonably required to protect the
Company's status as a REIT); and enable such Registrable Securities to be in
such denominations and registered in such names as the managing underwriters
may request at least two business days prior to any sale of Registrable
Securities to the underwriters;

                 (j)      cause the Registrable Securities covered by the
applicable Registration Statement to be registered with or approved by such
other governmental agencies or authorities as may be necessary to enable each
Participating Purchaser or the underwriters, if any, to consummate the
disposition of such Registrable Securities;

                 (k)      upon the occurrence of any event contemplated by
Section 4(c)(6) above, prepare a supplement or post-effective amendment to the
Registration Statement or the related Prospectus or any document incorporated
therein by reference or file any other required document so that, as thereafter
delivered to the purchasers of the Registrable Securities, the Prospectus will
not contain an untrue statement of a material fact or omit to state any
material fact necessary to make the statements therein not misleading;

                 (l)      cause all Registrable Securities covered by the
Registration Statement to be listed on each securities exchange on which
similar securities issued by the Company are then listed;

                 (m)      enter into such agreements (including an underwriting
agreement) and take all such other actions in connection therewith in order to
expedite or facilitate the disposition of such Registrable Securities and in
connection therewith, whether or not an underwriting agreement is entered into
and whether or not the registration is an Underwritten Registration, (1) make
such representations and warranties to each Participating Purchaser and the
underwriters, if any, in form, substance and scope as are customarily made by
issuers to underwriters in primary underwritten





                                       9
<PAGE>   10
offerings; (2) obtain opinions of counsel to the Company and updates thereof
(which counsel and opinions (in form, scope and substance) shall be reasonably
satisfactory to each Participating Purchaser and the managing underwriters, if
any, covering the matters customarily covered in opinions requested in
Underwritten Offerings and such other matters as may be reasonably requested by
any Participating Purchaser and the underwriters, if any; (3) obtain "cold
comfort" letters and updates thereof from the Company's independent certified
public accountants addressed to each Participating Purchaser and the
underwriters, if any, such letters to be in customary form and covering matters
of the type customarily covered in "cold comfort" letters by underwriters in
connection with primary Underwritten Offerings; (4) if an underwriting
agreement is entered into, the same shall set forth in full the indemnification
provisions and procedures of Section 6 hereof with respect to all parties to be
indemnified pursuant to said Section; and (5) deliver such documents and
certificates as may be reasonably requested by any Participating Purchaser and
the managing underwriters, if any, to evidence compliance with clause (1) above
and with any customary conditions contained in the underwriting agreement or
other agreement entered into by the Company.  The above shall be done at each
closing under such underwriting or similar agreement or as and to the extent
required thereunder;

                 (n)      make available for inspection by a representative of
any Participating Purchaser, any underwriter participating in any disposition
pursuant to such registration, and any attorney or accountant retained by any
Participating Purchaser or any underwriter, all financial and other records,
pertinent corporate documents and properties of the Company and cause the
Company's officers, trust managers and employees to supply all information
reasonably requested by any such representative, underwriter, attorney or
accountant in connection with such registration; provided that any records,
information or documents that the Company designates in writing as confidential
shall be kept confidential by such Persons unless disclosure of such records,
information or documents is required by court or administrative order;

                 (o)      otherwise use its commercially reasonable efforts to
comply with all applicable rules and regulations of the SEC, and make available
to its security holders, as soon as reasonably practicable, an earnings
statement covering a period of 12 months, beginning within three months after
the effective date of the registration statement, which earnings statement
shall satisfy the provisions of section 11(a) of the Securities Act; and

                 (p)      cooperate with Participating Purchasers and each
underwriter participating in the disposition of such Registrable Securities and
their respective counsel in connection with any filings required to be made
with the National Association of Securities Dealers, Inc. (the "NASD").

         The Company may require the Purchasers to furnish to the Company such
information regarding the distribution of Registrable Securities as the Company
may from time to time reasonably request in writing.

         Each Purchaser agrees by acquisition of the Registrable Securities
that, upon receipt of any notice from the Company of the happening of any event
of the kind described in Section 4(k) hereof,





                                       10
<PAGE>   11
such Purchaser will forthwith discontinue disposition of Registrable Securities
until such Purchaser's  receipt of the copies of the supplemented or amended
Prospectus contemplated by Section 4(k) hereof, or until it is advised in
writing (the "Advice") by the Company that the use of the Prospectus may be
resumed, and has received copies of any additional or supplemental filings
which are incorporated by reference in the Prospectus, and, if so directed by
the Company, such Purchaser will deliver to the Company (at the Company's
expense), all copies, other than permanent file copies then in such Purchaser's
possession, of the Prospectus covering such Registrable Securities current at
the time of receipt of such notice.  In the event the Company shall give any
such notice, the time periods regarding the effectiveness of Registration
Statements set forth in Section 2 hereof and Section 4(b) hereof shall be
extended by the number of days during the period from and including the date of
the giving of such notice pursuant to Section 4(c)(6) hereof to the date when
such Purchaser shall receive copies of the supplemented or amended prospectus
contemplated by Section 4(k) hereof or the Advice.

                 5.       Registration Expenses.  All expenses incident to the
Company's performance of or compliance with this Agreement, including without
limitation: all registration and filing fees; fees with respect to filings
required to be made with the NASD; fees and expenses of compliance with
securities or blue sky laws (including reasonable fees and disbursements of
counsel for the underwriters or the Participating Purchasers in connection with
blue sky qualifications of the Registrable Securities and determination of
their eligibility for investment under the laws of such jurisdictions as the
managing underwriters and the Purchasers may designate); printing expenses,
messenger, telephone and delivery expenses; fees and disbursements of counsel
for the Company and fees and expenses for independent certified public
accountants retained by the Company (including the expenses of any comfort
letters or costs associated with the delivery by independent certified public
accountants of a comfort letter or comfort letters requested pursuant to
Section 4(m) hereof); securities acts liability insurance, if the Company so
desires; all internal expenses of the Company (including, without limitation,
all salaries and expenses of its officers and employees performing legal or
accounting duties); the expense of any annual audit; the fees and expenses
incurred in connection with the listing of the securities to be registered on
each securities exchange on which similar securities issued by the Company are
then listed; and the fees and expenses of any Person, including special
experts, retained by the Company (all such expenses being herein called
"Registration Expenses") will be borne by the Company regardless of whether the
Registration Statement becomes effective.  The Company shall not have any
obligation to pay any underwriting fees, discounts or commissions attributable
to the sale of Registrable Securities, or any legal fees and expenses of
counsel to the Participating Purchasers, except as expressly provided herein.

         6.      Indemnification: Contribution.

                 (a)      Indemnification by Company.  The Company agrees to
indemnify and hold harmless MSAM and each Purchaser and their respective
partners, officers, directors, employees and agents, and each Person who
controls any such Persons (within the meaning of Section 15 of the Securities
Act or Section 20 of the Exchange Act) against all losses, claims, damages,
liabilities and reasonable expenses arising out of or based upon any untrue or
alleged untrue statement of a material





                                       11
<PAGE>   12
fact contained in any Registration Statement, Prospectus or preliminary
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 not
misleading, except insofar as the same are caused by or contained in any
information furnished in writing to the Company by MSAM or such Purchaser, as
the case may be, expressly for use therein.  The Company will also indemnify
underwriters, selling brokers, dealer managers and similar securities industry
professionals participating in the distribution, their officers and trust
managers and each Person who controls such Persons (within the meaning of
Section 15 of the Securities Act or Section 20 of the Exchange Act) to the same
extent as provided above with respect to the indemnification of MSAM and each
Purchaser, if requested.

                 (b)      Indemnification By Holder of Registrable Securities.
Each Purchaser, severally and not jointly, agrees to indemnify and hold
harmless the Company and its trust managers, officers, employees and agents,
and each Person who controls the Company (within the meaning of Section 15 of
the Securities Act or Section 20 of the Exchange Act) against any losses,
claims, damages, liabilities and reasonable expenses resulting from any untrue
statement of a material fact or any omission of a material fact required to be
stated in the Registration Statement or Prospectus or preliminary prospectus or
necessary to make the statements therein not misleading, to the extent, but
only to the extent, that such untrue statement or omission is contained in any
information or affidavit so furnished in writing by such Purchaser to the
Company specifically for inclusion in such Registration Statement or
Prospectus.  In no event shall the liability of any Purchaser hereunder be
greater in amount than the dollar amount of the proceeds received by such
Person upon the sale of the Registrable Securities giving rise to such
indemnification obligation.  The Company shall be entitled to receive
indemnities from underwriters, selling brokers, dealer managers and similar
securities industry professionals participating in the distribution, to the
same extent as provided above with respect to information so furnished in
writing by such Persons specifically for inclusion in any Prospectus or
Registration Statement.

                 (c)      Conduct of Indemnification Proceedings.  Any Person
entitled to indemnification hereunder will (i) give prompt notice (and in any
event within 10 days) to the indemnifying party of any claim with respect to
which it seeks indemnification and (ii) permit such indemnifying party to
assume the defense of such claim with counsel reasonably satisfactory to the
indemnified party; provided, however that any Person entitled to
indemnification hereunder shall have the right to employ separate counsel and
to participate in the defense of such claim, but the fees and expenses of such
counsel shall be at the expense of such Person unless (a) the indemnifying
party has agreed to pay such fees or expenses, (b) the indemnifying party shall
have failed to assume the defense of such claim and employ counsel reasonably
satisfactory to such Person or (c) based upon written advice of counsel to such
Person, there shall be one or more defenses available to such Person that are
not available to the indemnifying party or there shall exist conflicts of
interest pursuant to applicable rules of professional conduct between such
Person and the indemnifying party (in which case, if the Person notifies the
indemnifying party in writing that such Person elects to employ separate
counsel at the expense of the indemnifying party, the indemnifying party shall
not have the right to assume the defense of such claim on behalf of such
Person), in each of which events the fees and expenses of such counsel shall be
at the expense of the indemnifying party.  The





                                       12
<PAGE>   13
indemnifying party will not be subject to any liability for any settlement made
without its consent (but such consent will not be unreasonably withheld), but
if settled with its written consent, or if there be a final judgment for the
plaintiff in any such action or proceeding, the indemnifying party shall
indemnify and hold harmless the indemnified parties from and against any loss
or liability (to the extent stated above) by reason of such settlement or
judgment.  No indemnified party will be required to consent to entry of any
judgment or enter into any settlement which does not include as an
unconditional term thereof the giving by the claimant or plaintiff to such
indemnified party of a release from all liability in respect to such claim or
litigation.

                 (d)      Contribution.  If for any reason the indemnification
provided for in the preceding clauses (a) and (b) is unavailable to an
indemnified party or insufficient to hold it harmless as contemplated by the
preceding clauses (a) and (b), then the indemnifying party shall contribute to
the amount paid or payable by the indemnified party as a result of such loss,
claim, damage or liability in such proportion as is appropriate to reflect not
only the relative benefits received by the indemnified party and the
indemnifying party, but also the relative fault of the indemnified party and
the indemnifying party, as well as any other relevant equitable considerations,
provided, that in no event shall any Purchaser be required to contribute an
amount greater than the dollar amount of the proceeds received by such
Purchaser  with respect to the sale of the Registrable Securities giving rise
to such indemnification obligation.  The relative fault of the Company on the
one hand and of the Purchasers on the other shall be determined by reference
to, among other things, whether the untrue or alleged untrue statement of a
material fact or the omission or alleged omission to state a material fact
relates to information supplied by such party, and the parties' relative
intent, knowledge, access to information, and opportunity to correct or prevent
such statement or omission.  No Person guilty of fraudulent misrepresentation
(within the meaning of Section 10(f) of the Securities Act) shall be entitled
to contribution from any Person who was not guilty of such fraudulent
misrepresentation.

         7.      Rule 144.  The Company hereby agrees that it will file the
reports required to be filed by it under the Securities Act and the Exchange
Act and the rules and regulations adopted by the SEC thereunder (or, if the
Company is not required to file such reports, it will, upon the request of the
Purchasers, make publicly available other information so long as necessary to
permit sales pursuant to Rule 144 under the Securities Act), and it will take
such further action as any Purchaser may reasonably request, all to the extent
required from time to time to enable each Purchaser to sell Registrable
Securities without registration under the Securities Act within the limitation
of the exemptions provided by (a) Rule 144 under the Securities Act, as such
Rule may be amended from time to time, or (b) any similar rule or regulation
hereafter adopted by the SEC.  Upon the request of any Purchaser, the Company
will deliver to such Purchaser a written statement as to whether it has
complied with such information and requirements.





                                       13
<PAGE>   14
         8.      Participation in Underwritten Registrations.

                 (a)      If any of the Registrable Securities covered by the
Shelf Registration are to be sold in an Underwritten Offering (excluding under
Section 2(c)), the investment banker or investment bankers and manager or
managers that will administer the offering will be selected by Participating
Purchasers holding in the aggregate in excess of 50% of the Registrable
Securities covered thereby; provided that such investment bankers and managers
must be reasonably satisfactory to the Company.

                 (b)      No Person may participate in any Underwritten
Registration hereunder unless such Person (i) agrees to sell such Person's
securities on the basis provided in any underwriting arrangements approved by
the Persons entitled hereunder to approve such arrangements and (ii) completes
and executes all questionnaires, powers of attorney, indemnities, underwriting
agreements and other documents required under the terms of such underwriting
arrangements.  Nothing in this Section 8 shall be construed to create any
additional rights regarding the registration of Registrable Securities in any
Person otherwise than as set forth herein.

         9.      Miscellaneous.

                 (a)      Remedies.  Each party hereto, in addition to being
entitled to exercise all rights provided herein or granted by law, including
recovery of damages, will be entitled to specific performance of its rights
under this Agreement to the extent available under applicable law.  Each party
hereto agrees that monetary damages would not be adequate compensation for any
loss incurred by reason of a breach by it of the provisions of this Agreement
and hereby agrees to waive the defense in any action for specific performance
that a remedy at law would be adequate.

                 (b)      Third Party Registration Rights.  The Company will
not after the date of this Agreement, enter into any agreement granting
registration rights to any other Person with respect to the securities of the
Company that are not junior or subordinate to the rights granted to the
Purchasers hereunder without the written consent of MSAM.

                 (c)      Successors and Assigns.  This Agreement shall inure
to the benefit of and be binding upon the successors and assigns of each of the
parties, including without limitation and without the need for an express
assignment, subsequent holders of Registrable Securities,  provided further,
that the Company cannot assign its rights hereunder except pursuant to a
merger.

                 (d)      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.

                 (e)      Headings.  The headings in this Agreement are for
convenience of reference only and shall not limit or otherwise affect the
meaning hereof.





                                       14
<PAGE>   15
                 (f)      Governing Law.  THIS AGREEMENT, AND THE RIGHTS AND
OBLIGATIONS OF THE PARTIES HERETO, SHALL BE GOVERNED BY AND CONSTRUED AND
ENFORCED IN ACCORDANCE WITH THE INTERNAL SUBSTANTIVE LAWS OF THE STATE OF
TEXAS, WITHOUT REGARD TO ITS PRINCIPLES OF CONFLICTS OF LAWS.

                 (g)      Severability.  If any provision of this Agreement is
held to be illegal, invalid or unenforceable under any current or future law,
and if the rights or obligations of the parties under this Agreement would not
be materially and adversely affected thereby, such provision shall be fully
separable, and this Agreement shall be construed and enforced as if such
illegal, invalid or unenforceable provision had never comprised a part thereof,
and the remaining provisions of this Agreement shall remain in full force and
effect and shall not be affected by the illegal, invalid or unenforceable
provision or by its severance therefrom.  In lieu of such illegal, invalid or
unenforceable provision, there shall be added simultaneously as a part of this
Agreement, a legal, valid and enforceable provision as similar in terms to such
illegal, invalid or unenforceable provision as may be possible, and the parties
hereto request the court or any arbitrator to whom disputes relating to this
Agreement are submitted to reform the otherwise illegal, invalid or
unenforceable provision in accordance with this Section 9(g).

                 (h)      Arbitration.  In the event of a dispute hereunder
which cannot be resolved by the parties, such dispute shall be settled by
arbitration in accordance with the Commercial Arbitration Rules of the American
Arbitration Association and judgment on the award rendered by the arbitration
panel may be entered in any court or tribunal of competent jurisdiction.  Any
arbitration occurring under this Section 9(h) shall be held in Dallas, Texas.

                 (i)      Entire Agreement.  This Agreement is intended by the
parties as a final expression of their agreement and intended to be a complete
and exclusive statement of the agreement and understanding of the parties
hereto in respect of the subject matter contained herein.  This Agreement
supersedes all prior agreements and understandings between the parties with
respect to such subject matter.

                 (j)      Attorneys' Fees.   In any proceeding brought to
enforce any provision of this Agreement the successful party shall be entitled
to recover reasonable attorneys' and accountants'  fees in addition to its
costs and expenses and any other available remedy.

                 (k)      MSAM as Agent.   (i) The Company, MSRE, MSAM and each
of the MSAM Purchasers acknowledge and agree that each of the MSAM Purchasers
has initially appointed MSAM to acts as its agent and attorney-in-fact in
connection with the matters contemplated by this Agreement.  Until such time as
the Company shall have received a written notice from any MSAM Purchaser that
MSAM is no longer acting as such Purchaser's agent hereunder, the Company shall
be entitled to rely on any instructions and notices received from MSAM on
behalf of such Purchaser as if received from such Purchaser directly.  The
parties hereto further acknowledge and agree that MSAM shall act solely as
agent on behalf of the MSAM Purchasers in connection with the matters set forth
in this Agreement, and that MSAM shall not, under any circumstances, have any
liability





                                       15
<PAGE>   16
to the Company in its individual capacity arising out of or in connection with
this Agreement or the transactions contemplated hereby.

                 (ii) The Company agrees that for so long as MSAM shall act as
agent on behalf of any of the MSAM Purchasers hereunder, it shall deliver to
MSAM copies of all documents and notices required to be delivered to the
Participating Purchasers pursuant to Section 4 of this Agreement.

                 (iii)    In the event that any MSAM Purchaser shall at any
time subsequent to the date hereof appoint a successor agent to MSAM in
connection with the matters est forth in this Agreement, such successor shall
be entitled to, and to exercise on behalf of such MSAM Purchaser, all of the
rights and remedies provided for herein with respect to MSAM or such MSAM
Purchaser, as the case may be, and the rights and remedies of such MSAM
Purchaser hereunder shall not in any way be modified, limited, delayed or
impaired as a consequence of such appointment.

                 (iv)     The provisions of Section 5, 6 and of this Section
9(k) shall remain in full force and effect with respect to MSAM notwithstanding
any termination of MSAM's appointment as agent on behalf of any or all of the
MSAM Purchasers hereunder.

                 (l)      Amendments and Waivers.  The provisions of this
Agreement, including the provisions of this sentence, may not be amended,
modified or supplemented, and waivers or consents to departures from the
provisions hereof may not be given without the written consent of the Company,
each Purchaser and, for so long as MSAM shall act as agent on behalf of any of
the MSAM Purchasers, MSAM; provided, that the provisions of Sections 5, 6 and
9(k) may not, under any circumstances and notwithstanding any termination of
MSAM's appointment as agent on behalf of any or all of the MSAM Purchasers
hereunder, be amended, modified, supplemented or waived without the written
consent of MSAM.

                 (m)      Notices.  The notice provisions contained in Section
12.11 of the Purchase Agreement shall be incorporated herein and shall be
governing under this Agreement.

                 (n)      Representation of the Trust.  The Trust hereby
represents and warrants to Investor that the rights granted to Investor
hereunder are pari passu to the registration rights granted by the Trust to
each of Praedium, USAA, the LaSalle Entities and DDR.





                                       16
<PAGE>   17
         IN WITNESS WHEREOF, the parties hereto have executed this Second
Amendment and Restated Registration Rights Agreement as of the date first
written above.





                                    "COMPANY"
                                    
                                    AMERICAN INDUSTRIAL PROPERTIES REIT
                                    
                                    
                                        /s/ Charles W. Wolcott                 
                                    -------------------------------------------
                                    

                                    Charles W.  Wolcott
                                    President and Chief Executive Officer
                                    
                                    
                                    "MSRE"
                                    
                                    MS REAL ESTATE SPECIAL SITUATIONS, INC.
                                    
                                    By: /s/ Russell Platt                      
                                        ---------------------------------------
                                    Name:    Russell Platt                     
                                            -----------------------------------
                                    Title: Managing Director                   
                                           ------------------------------------
                                    
                                    
                                    "MSAM"
                                    
                                    MORGAN STANLEY ASSET MANAGEMENT INC.,
                                    as agent and attorney-in-fact
                                    on behalf of the MSAM Purchasers
                                    
                                    By: /s/ Russell Platt                      
                                        ---------------------------------------
                                    Name:   Russell Platt                      
                                            -----------------------------------
                                    Title: Managing Director                   
                                           ------------------------------------





                                       17
<PAGE>   18
                                                                      SCHEDULE A

                                MSAM PURCHASERS


Stichting Pensioenfonds ABP
Stichting Bedrijfspensioenfonds voor de Metaalnijverheid
Morgan Stanley Real Estate Special Situations Fund II, L.P.
Morgan Stanley Real Estate Special Situations Fund I, L.P.





                                       18

<PAGE>   1
                                                                    EXHIBIT 10.4




           SECOND AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT

                 This Second Amended and Restated Registration Rights Agreement
(the "Agreement") is made and entered into as of July 30, 1998, by and between
American Industrial Properties REIT, a Texas real estate investment trust (the
"Company"), and USAA Real Estate Company, a Delaware corporation ("Investor").

                                  WITNESSETH:

                 WHEREAS, pursuant to that certain Share Purchase Agreement
dated as of December 13, 1996, between the Company and Investor, Investor
purchased 924,600 Common Shares from the Company;

                 WHEREAS, pursuant to that certain Share Purchase Agreement,
dated as of December 20, 1996, among the Company, American Industrial
Properties REIT, Inc., a Maryland corporation ("Sub") and Investor (together
with the Share Purchase Agreement referenced in the preceding recital, the
"Purchase Agreement"), Investor purchased 998,100 Common Shares from Sub;

                 WHEREAS, the Company and the Investor entered into
Registration Rights Agreements dated as of December 19, 1996, December 20,
1996, and January 29, 1998 (collectively, the "Prior Registration Rights
Agreement");

                 WHEREAS, on December 1, 1997, Investor converted the Company's
$5,449,618 principal amount note (the "Convertible Note") to Investor into
544,961 Common Shares (such shares and the 924,600 Common Shares and the
998,100 Common Shares shall be referred to herein collectively as the
"Shares");

                 WHEREAS, pursuant to the terms of the Share Purchase
Agreement, an Agreement and Plan of Merger  and the Convertible Note, the
Company and Investor agreed that the Company would grant certain registration
rights to Investor with respect to the Shares;

                 WHEREAS, the Company is entering into a Share Purchase
Agreement and a Registration Rights Agreement on the date hereof with
Developers Diversified Realty Corporation ("DDR"); and

                 WHEREAS, to enable the Company to enter into such agreements
with DDR, the Investor has agreed to amend the registration rights previously
granted to Investor by the Company;

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



                                      1
<PAGE>   2
         1.      Definitions.

                 As used in this Agreement, the following capitalized terms
shall have the following meanings:

                 Closing Date: The closing date as defined in the Purchase
Agreement.

                 Common Shares: The common shares of beneficial interest, $0.10
par value per share, of the Company.

                 Exchange Act: The Securities Exchange Act of 1934, as amended
from time to   time.

                 Person: An individual, partnership,  corporation, limited
liability company, trust or unincorporated organization, or a government or
agency or political subdivision thereof.

                 Prospectus: The prospectus included in any Registration
Statement, as amended or supplemented by any prospectus supplement with respect
to the terms of the offering of any portion of the Registrable Securities
covered by such Registration Statement and by all other amendments and
supplements to the prospectus, including post-effective amendments and all
material incorporated by reference in such prospectus.

                 Purchase Agreement: As defined in the Recitals to this
Agreement.

                 Purchasers: See Section 2(b) hereof.

                 Registrable Securities: (a) The Shares and (b) any securities
issued or issuable with respect to the Shares by way of share dividend or share
split or in connection with a combination of shares, recapitalization, merger,
consolidation or other reorganization or otherwise.  Any Registrable Security
will cease to be a Registrable Security when (i) a registration statement
covering such Registrable Security has been declared effective by the SEC and
the Registrable Security has been disposed of pursuant to such effective
registration statement, (ii) the Registrable Security is sold under
circumstances in which all of the applicable conditions of Rule l44 (or any
similar provisions then in force) under the Securities Act are met, or (iii)
the Registrable Security has been otherwise transferred, the Company has
delivered a new certificate or other evidence of ownership for it not bearing a
legend restricting further transfer, and it may be resold without subsequent
registration under the Securities Act.

                 Registration Expenses: See Section 5 hereof.

                 Registration Statement: The Registration Statement of the
Company that covers any of the Registrable Securities pursuant to the
provisions of this Agreement, including the Prospectus included therein, all
amendments and supplements to such Registration Statement, including





                                       2
<PAGE>   3
post-effective amendments, all exhibits and all material incorporated by
reference in such Registration Statement.

                 SEC: The Securities and Exchange Commission or any successor
entity.

                 Securities Act: The Securities Act of 1933, as amended from
time to time.

                 Shares: As defined in the Recitals to this Agreement.

                 Shelf Registration: See Section 2(a) hereof.

                 Underwritten Registration or Underwritten Offering: A
registration in which securities of the Company are sold to an underwriter for
reoffering to the public.

         2.      Registration Rights.

                 (a)      Shelf Registration.  Upon the written request of the
Investor, the Company will file a "shelf" registration statement on any
appropriate form pursuant to Rule 415 (or similar rule that may be adopted by
the SEC) under the Securities Act (a "Shelf Registration"), which Shelf
Registration will cover the Registrable Securities that the Company has been so
requested to register by the Investor.

                 The Company hereby agrees to file such registration statement
as promptly as practicable following the request therefor, and in any event
within 60 days following the date such request is received by the Company, and
thereafter to use its commercially reasonable efforts to cause such Shelf
Registration to become effective and thereafter to keep it continuously
effective, and to prevent the happening of any event of the kind described in
Section 4(c)(3), (4), (5) or (6) hereof that requires the Company to give
notice pursuant to the last paragraph of Section 4 hereof, for a period
terminating on the third year anniversary of the date on which the SEC declares
the Shelf Registration effective, or such shorter period as shall terminate on
the date on which all the Registrable Securities covered by the Shelf
Registration have been sold pursuant to such Shelf Registration.  The Company
shall be obligated to file only one Shelf Registration and shall not be
obligated to file a Shelf Registration if three Demand Registrations
(hereinafter defined) have been effected under Section 2(b).

         The Company further agrees to promptly supplement or make amendments
to the Shelf Registration, if required by the rules, regulations or
instructions applicable to the registration form utilized by the Company or by
the Securities Act or rules and regulations thereunder for shelf registration
or if requested by the Investor.

         If the Investor so elects, the offering of Registrable Securities
pursuant to such registration shall be in the form of an Underwritten Offering.





                                       3
<PAGE>   4
                 (b)      Demand Registration.  At any time during the five
year period following the Closing Date, the Investor  may make a written
request (the "Demand Notice") for registration under the Securities Act (a
"Demand Registration") of its Registrable Securities. The Demand Notice will
specify the number of shares of Registrable Securities proposed to be sold and
will also specify the intended method of disposition thereof.  Following
receipt of a Demand Notice from the Investor, the Company promptly will file a
registration statement on any appropriate form which will cover the Registrable
Securities that the Company has been so requested to register by the Investor.

         Unless the Investor shall consent in writing, no party (including the
Company) other than  DDR, Praedium II Industrial Associates LLC ("Praedium"),
MS Real Estate Special Situations Inc. ("MRSE"),  certain clients of  Morgan
Stanley Asset Management Inc. who have purchased Common Shares of the Company
(such clients together with MRSE, the "Morgan Entities"), LaSalle Advisors
Limited Partnership acting as agent for and on behalf of certain clients
("LaSalle"), or ABKB/LaSalle Securities Limited Partnership ("ABKB" and
together with LaSalle, the "LaSalle Entities") shall be permitted to offer
securities under any such Demand Registration.  The Company shall not be
required to effect more than three Demand Registrations under this Section
2(b).  A registration requested pursuant to this Section 2(b) will not be
deemed to have been effected (and it shall not count as one of the three Demand
Registrations) unless the Registration Statement relating thereto has become
effective under the Securities Act; provided, however that if, after such
Registration Statement has become effective, the offering of the Registrable
Securities pursuant to such registration is interfered with by any stop order,
injunction or other order or requirement of the SEC or any other governmental
agency or court, such registration will be deemed not to have been effected
(and it shall not count as one of the three Demand Registrations). The Investor
may at any time prior to the effective date of the Registration Statement
relating to such registration revoke a Demand Notice by providing a written
notice to the Company (in which case such Demand Registration shall not count
as one of the three Demand Registrations).

         If the Investor so elects, the offering of Registrable Securities
pursuant to such registration shall be in the form of an Underwritten Offering.
If the managing underwriter or underwriters of such offering advise the Company
and the Investor in writing that in their opinion the number of shares of
Registrable Securities and shares of DDR, Praedium, the Morgan Entities or the
LaSalle Entities, if any,  requested to be included in such offering is
sufficiently large to materially and adversely affect the success of such
offering, the Company will include in such registration the aggregate number of
Registrable Securities and shares of DDR, Praedium, the Morgan Entities or the
LaSalle Entities, if any, requested to be included,  which in the opinion of
such managing underwriter or underwriters can be sold without any such material
adverse effect; provided, however, that no Registrable Securities or shares of
DDR, Praedium, the Morgan Entities or the LaSalle Entities, if any, may be
excluded before all shares proposed to be sold by other parties, including the
Company, have been excluded.  If  any Registrable Securities are excluded, such
registration shall not count as one of the three Demand Registrations.  If the
amount of Registrable Securities proposed to be registered hereunder are
required to be excluded pursuant to this paragraph, the number of Registrable
Securities of the Investor and the number of shares of DDR, Praedium, the
Morgan Entities or the LaSalle Entities, if any, to be included in such
Registration shall be reduced





                                       4
<PAGE>   5
pro rata (according to the total number of Registrable Securities or shares, as
the case may be, beneficially owned by each such holder), to the extent
necessary to reduce the total amount necessary to be included in the Offering
to the amount recommended by such managing underwriter or underwriters.

         No registration pursuant to a request or requests referred to in this
subsection 2(b) shall be deemed to be a Shelf Registration.

                 (c)      Incidental Registration.  If at any time during the
five year period following the Closing Date, the Company proposes to file a
registration statement under the Securities Act (other than in connection with
a Registration Statement on Form S-4 or S-8, or any form that is substituting
therefor or is a successor thereto) with respect to an offering of any class of
security by the Company for its own account or for the account of any of its
security holders, then the Company shall give written notice of such proposed
filing to the Investor as soon as practicable (but in no event less than 30
days before the anticipated filing date), and such notice shall (i) offer the
Investor the opportunity to register such number of Registrable Securities as
it may request and (ii) describe such securities and specify the form and
manner and other relevant facts involved in such proposed registration
(including, without limitation, (x) whether or not such registration will be in
connection with an Underwritten Offering and, if so, the identity of the
managing underwriter and whether such Underwritten Offering will be pursuant to
a "best efforts" or "firm commitment" underwriting and (y) the price (net of
any underwriting commissions, discounts and the like) at which the Registrable
Securities are reasonably expected to be sold, if such disclosure is acceptable
to the managing underwriter). The Investor  shall advise the Company in writing
within 20 days after the date of receipt of such notice from the Company of the
number of Registrable Securities for which registration is requested.  The
Company shall include in such Registration Statement all such Registrable
Securities so requested to be included therein, and, if such registration is an
Underwritten Registration, the Company shall use its commercially reasonable
efforts to cause the managing underwriter or underwriters to permit the
Registrable Securities requested to be included in the registration statement
for such offering to be included (on the same terms and conditions as similar
securities of the Company included therein to the extent appropriate);
provided, however, that if the managing underwriter or underwriters of such
offering deliver a written opinion to the Investor that either because of (i)
the kind of securities which the Investor, the Company, or any other Persons
intend to include in such offering or (ii) the size of the offering which the
Investor, the Company, or such other Persons intend to make, the success of the
offering would be materially and adversely affected by inclusion of the
Registrable Securities requested to be included, then (A) in the event that the
size of the offering is the basis of such managing underwriter's opinion, the
amount of securities to be offered for the account of the Investor and other
holders registering securities of the Company pursuant to similar incidental
registration rights shall be reduced pro rata (according to the Registrable
Securities beneficially owned by each such holder) to the extent necessary to
reduce the total amount of securities to be included in such offering to the
amount recommended by such managing underwriter or underwriters; and (B) in the
event that the combination of securities to be offered is the basis of such
managing underwriter's opinion, (x) the Registrable Securities and other
securities to be included in such offering shall be reduced as described in
clause (A) above or, (y)





                                       5
<PAGE>   6
if the actions described in clause (A) would, in the judgment of the managing
underwriter and pursuant to a written opinion delivered to the Investor, be
insufficient to substantially eliminate the adverse effect that inclusion of
the Registrable Securities requested to be included would have on such
offering, such Registrable Securities will be excluded from such offering.
Notwithstanding the foregoing, if the Investor exercises an incidental
registration in connection with DDR's or Praedium's or the Morgan Entities' or
LaSalle Entities' demand registration rights, then the managing underwriter's
cutback provision under the demand registration right set forth in Section 2(b)
shall govern with respect to the Investor and not the managing underwriter's
cutback provision in this Section 2(c).

         No registration pursuant to a request or requests referred to in this
subsection 2(c) shall be deemed to be a Shelf Registration.

         3.      Hold-Back Agreements.

                 (a)      Restrictions on Public Sale by Holder of Registrable
Securities. The Investor agrees, if reasonably requested by the managing
underwriters in an Underwritten Offering, not to effect any public sale or
distribution of securities of the Company of the same class as the securities
included in the Registration Statement relating to such Underwritten Offering,
including a sale pursuant to Rule 144 under the Securities Act (except as part
of such Underwritten Offering), during the 10-day period prior to the filing of
such Registration Statement, and during the 90-day period beginning on the
closing date of each Underwritten Offering made pursuant to such Registration
Statement, to the extent timely notified in writing by the Company or the
managing underwriters.

                 (b)      Restrictions on Sale of Securities by the Company.
The Company agrees not to effect any public sale or distribution of any
securities similar to those being registered, or any securities convertible
into or exchangeable or exercisable for such securities (except pursuant to a
registration statement on Form S-4 or S-8, or any substitute form that may be
adopted by the SEC) during the ten days prior to the filing of a registration
statement with respect to an Underwritten Offering, and during the 90-day
period beginning on the effective date of such Registration Statement (except
as part of such registration statement (x) where the Investor participating in
such registration statement consents, (y) where the Investor is participating
in such registration statement pursuant to Section 2(c) hereof, such
registration statement was filed by the Company with respect to the sale of
securities by the Company, and the Investor is not simultaneously participating
in a registration statement pursuant to Section 2(b) hereof), or (z) with
respect to DDR, Praedium, the Morgan Entities or the LaSalle Entities, if such
parties are participating in a Demand Registration pursuant to Section 2(b)
hereof), or the commencement of a public distribution of Registrable Securities
pursuant to such registration statement.

         4.      Registration Procedures.  In connection with the Company's
registration obligations pursuant to Section 2 hereof, the Company will use its
commercially reasonable efforts to effect such registration to permit the sale
of such Registrable Securities in accordance with the intended method or
methods of distribution thereof, and pursuant thereto the Company will use
commercially reasonable efforts to as expeditiously as possible:





                                       6
<PAGE>   7
                 (a)      prepare and file with the SEC, as soon as
practicable, and in any event within 60 days from the date of request, a
Registration Statement relating to the applicable registration on any
appropriate form under the Securities Act, which forms shall be available for
the sale of the Registrable Securities in accordance with the intended method
or methods of distribution thereof and shall include all financial statements
of the Company, and use its commercially reasonable efforts to cause such
Registration Statement to become effective; provided that before filing a
Registration Statement or Prospectus or any amendments or supplements thereto,
including documents incorporated by reference after the initial filing of the
Registration Statement, the Company will furnish the Investor and the
underwriters, if any, copies of all such documents proposed to be filed, which
documents will be subject to the review of the Investor and the underwriters,
if any, and the Company will not file any Registration Statement or amendment
thereto or any Prospectus or any supplement thereto (including such documents
incorporated by reference) to which the Investor or the underwriters, if any,
shall reasonably object (except in the case of a filing pursuant to Section
2(c) hereof);

                 (b)      prepare and file with the SEC such amendments and
post-effective amendments to the Registration Statement as may be necessary to
keep the Registration Statement effective for the applicable period, or such
shorter period, which will terminate when all Registrable Securities included
in such Registration Statement have been sold; cause the Prospectus to be
supplemented by any required Prospectus supplement, and as so supplemented to
be filed pursuant to Rule 424 under the Securities Act; and comply with the
provisions of all securities included in such Registration Statement during the
applicable period in accordance with the intended method or methods of
distribution by the sellers thereof set forth in such Registration Statement or
supplement to the Prospectus; the Company shall not be deemed to have used
commercially reasonable efforts to keep a Registration Statement effective
during the applicable period if it voluntarily takes any action that would
result in the Investor not being able to sell its Registrable Securities during
that period unless such action is required under applicable law; provided that
the foregoing shall not apply to actions taken by the Company in good faith and
for valid business reasons, including without limitation the acquisition or
divestiture of assets, so long as the Company promptly thereafter complies with
the requirements of Section 4(k) hereof, if applicable;

                 (c)      notify the Investor and the managing underwriters, if
any, promptly (and in no event more than three days after the occurrence of any
of the following events), and (if requested by any such Person) confirm such
advice in writing, (l) when the Prospectus or any Prospectus supplement or
post-effective amendment has been filed, and, with respect to the Registration
Statement or any post-effective amendment, when the same has become effective,
(2) of any request by the SEC for amendments or supplements to the Registration
Statement or the Prospectus or for additional information, (3) of the issuance
by the SEC of any stop order suspending the effectiveness of the Registration
Statement or the initiation of any proceedings for that purpose, (4) if at any
time the representations and warranties of the Company contemplated by
paragraph (m) below cease to be true and correct, (5) of the receipt by the
Company of any notification with respect to the





                                       7
<PAGE>   8
suspension of the qualification of the Registrable Securities for sale in any
jurisdiction or the initiation or threatening of any proceeding for such
purpose and (6) of the happening of any event which makes any statement made in
the Registration Statement, the Prospectus or any document incorporated therein
by reference untrue or which requires the making of any changes in the
Registration Statement, the Prospectus or any document incorporated therein by
reference in order to make the statements therein not misleading;

                 (d)      obtain the withdrawal of any order suspending the
effectiveness of the Registration Statement at the earliest possible moment;

                 (e)      if reasonably requested by the managing underwriter
or underwriters or by the Investor, promptly incorporate in a Prospectus
supplement or post-effective amendment such information as the managing
underwriters and the Investor agree should be included therein relating to the
sale of the Registrable Securities, including, without limitation, information
with respect to the number of Registrable Securities being sold to such
underwriters, the purchase price being paid therefor by such underwriters and
with respect to any other terms of the Underwritten (or best efforts
underwritten) Offering of the Registrable Securities to be sold in such
offering; and make all required filings of such Prospectus supplement or
post-effective amendment as soon as notified of the matters to be incorporated
in such Prospectus supplement or post-effective amendment;

                 (f)      furnish to the Investor and each managing
underwriter, if any, without charge, at least one signed copy of the
Registration Statement and any post-effective amendment thereto, including
financial statements and schedules, all documents incorporated therein by
reference and all exhibits (including those incorporated by reference);

                 (g)      deliver to the Investor and the underwriters, if any,
without charge, as many copies of the Prospectus (including each preliminary
prospectus) and any amendment or supplement thereto as such Persons may
reasonably request; the Company consents to the use of the Prospectus or any
amendment or supplement thereto by the Investor and the underwriters, if any,
in connection with the offering and sale of the Registrable Securities covered
by the Prospectus or any amendment or supplement thereto;

                 (h)      prior to any public offering of Registrable
Securities, register or qualify or cooperate with the Investor, the
underwriters, if any, and their respective counsel in connection with the
registration or qualification of such Registrable Securities for offer and sale
under the securities or blue sky laws of such jurisdictions as the Investor or
any underwriter reasonably requests in writing and do any and all other acts or
things necessary or advisable to enable the disposition in such jurisdictions
of the Registrable Securities covered by the Registration Statement;

                 (i)      cooperate with the Investor and the managing
underwriters, if any, to facilitate the timely preparation and delivery of
certificates representing Registrable Securities to be sold and not bearing any
restrictive legends (except as reasonably required to protect the Company's
status as a REIT); and enable such Registrable Securities to be in such
denominations and registered in





                                       8
<PAGE>   9
such names as the managing underwriters may request at least two business days
prior to any sale of Registrable Securities to the underwriters;

                 (j)      cause the Registrable Securities covered by the
applicable Registration Statement to be registered with or approved by such
other governmental agencies or authorities as may be necessary to enable the
Investor or the underwriters, if any, to consummate the disposition of such
Registrable Securities;

                 (k)      upon the occurrence of any event contemplated by
Section 4(c)(6) above, prepare a supplement or post-effective amendment to the
Registration Statement or the related Prospectus or any document incorporated
therein by reference or file any other required document so that, as thereafter
delivered to the purchasers of the Registrable Securities, the Prospectus will
not contain an untrue statement of a material fact or omit to state any
material fact necessary to make the statements therein not misleading;

                 (l)      cause all Registrable Securities covered by the
Registration Statement to be listed on each securities exchange on which
similar securities issued by the Company are then listed;

                 (m)      enter into such agreements (including an underwriting
agreement) and take all such other actions in connection therewith in order to
expedite or facilitate the disposition of such Registrable Securities and in
connection therewith, whether or not an underwriting agreement is entered into
and whether or not the registration is an Underwritten Registration, (1) make
such representations and warranties to the Investor and the underwriters, if
any, in form, substance and scope as are customarily made by issuers to
underwriters in primary underwritten offerings; (2) obtain opinions of counsel
to the Company and updates thereof (which counsel and opinions (in form, scope
and substance) shall be reasonably satisfactory to the Investor and the
managing underwriters, if any, covering the matters customarily covered in
opinions requested in Underwritten Offerings and such other matters as may be
reasonably requested by the Investor and the underwriters, if any; (3) obtain
"cold comfort" letters and updates thereof from the Company's independent
certified public accountants addressed to the Investor and the underwriters, if
any, such letters to be in customary form and covering matters of the type
customarily covered in "cold comfort" letters by underwriters in connection
with primary Underwritten Offerings; (4) if an underwriting agreement is
entered into, the same shall set forth in full the indemnification provisions
and procedures of Section 6 hereof with respect to all parties to be
indemnified pursuant to said Section; and (5) deliver such documents and
certificates as may be reasonably requested by the Investor and the managing
underwriters, if any, to evidence compliance with clause (1) above and with any
customary conditions contained in the underwriting agreement or other agreement
entered into by the Company.  The above shall be done at each closing under
such underwriting or similar agreement or as and to the extent required
thereunder;

                 (n)      make available for inspection by a representative of
the Investor, any underwriter participating in any disposition pursuant to such
registration, and any attorney or accountant retained by the Investor or any
underwriter, all financial and other records, pertinent





                                       9
<PAGE>   10
corporate documents and properties of the Company and cause the Company's
officers, trust managers and employees to supply all information reasonably
requested by any such representative, underwriter, attorney or accountant in
connection with such registration; provided that any records, information or
documents that the Company designates in writing as confidential shall be kept
confidential by such Persons unless disclosure of such records, information or
documents is required by court or administrative order;

                 (o)      otherwise use its commercially reasonable efforts to
comply with all applicable rules and regulations of the SEC, and make available
to its security holders, as soon as reasonably practicable, an earnings
statement covering a period of 12 months, beginning within three months after
the effective date of the registration statement, which earnings statement
shall satisfy the provisions of section 11(a) of the Securities Act; and

                 (p)      cooperate with the Investor and each underwriter
participating in the disposition of such Registrable Securities and their
respective counsel in connection with any filings required to be made with the
National Association of Securities Dealers, Inc. (the "NASD").

         The Company may require the Investor to furnish to the Company such
information regarding the distribution of Registrable Securities as the Company
may from time to time reasonably request in writing.

         The Investor agrees by acquisition of the Registrable Securities that,
upon receipt of any notice from the Company of the happening of any event of
the kind described in Section 4(k) hereof, the Investor will forthwith
discontinue disposition of Registrable Securities until the Investor's receipt
of the copies of the supplemented or amended Prospectus contemplated by Section
4(k) hereof, or until it is advised in writing (the "Advice") by the Company
that the use of the Prospectus may be resumed, and has received copies of any
additional or supplemental filings which are incorporated by reference in the
Prospectus, and, if so directed by the Company, the Investor will deliver to
the Company (at the Company's expense), all copies, other than permanent file
copies then in the Investor's possession, of the Prospectus covering such
Registrable Securities current at the time of receipt of such notice.  In the
event the Company shall give any such notice, the time periods regarding the
effectiveness of Registration Statements set forth in Section 2 hereof and
Section 4(b) hereof shall be extended by the number of days during the period
from and including the date of the giving of such notice pursuant to Section
4(c)(6) hereof to the date when the Investor shall receive copies of the
supplemented or amended prospectus contemplated by Section 4(k) hereof or the
Advice.

                 5.       Registration Expenses.  All expenses incident to the
Company's performance of or compliance with this Agreement, including without
limitation: all registration and filing fees; fees with respect to filings
required to be made with the NASD; fees and expenses of compliance with
securities or blue sky laws (including reasonable fees and disbursements of
counsel for the underwriters or the Investor in connection with blue sky
qualifications of the Registrable Securities and determination of their
eligibility for investment under the laws of such jurisdictions as the





                                       10
<PAGE>   11
managing underwriters and the Investor may designate); printing expenses,
messenger, telephone and delivery expenses; fees and disbursements of counsel
for the Company and fees and expenses for independent certified public
accountants retained by the Company (including the expenses of any comfort
letters or costs associated with the delivery by independent certified public
accountants of a comfort letter or comfort letters requested pursuant to
Section 4(m) hereof); securities acts liability insurance, if the Company so
desires; all internal expenses of the Company (including, without limitation,
all salaries and expenses of its officers and employees performing legal or
accounting duties); the expense of any annual audit; the fees and expenses
incurred in connection with the listing of the securities to be registered on
each securities exchange on which similar securities issued by the Company are
then listed; and the fees and expenses of any Person, including special
experts, retained by the Company (all such expenses being herein called
"Registration Expenses") will be borne by the Company regardless of whether the
Registration Statement becomes effective.  The Company shall not have any
obligation to pay any underwriting fees, discounts or commissions attributable
to the sale of Registrable Securities, or any legal fees and expenses of
counsel to the Investor, except as expressly provided herein.

         6.      Indemnification: Contribution.

                 (a)      Indemnification by Company.  The Company agrees to
indemnify and hold harmless the Investor and its partners, officers, directors,
employees and agents, and each Person who controls any such Persons (within the
meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act)
against all losses, claims, damages, liabilities and reasonable expenses
arising out of or based upon any untrue or alleged untrue statement of a
material fact contained in any Registration Statement, Prospectus or
preliminary 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 not misleading, except insofar as the same are caused by or contained
in any information furnished in writing to the Company by the Investor
expressly for use therein.  The Company will also indemnify underwriters,
selling brokers, dealer managers and similar securities industry professionals
participating in the distribution, their officers and trust managers and each
Person who controls such Persons (within the meaning of Section 15 of the
Securities Act or Section 20 of the Exchange Act) to the same extent as
provided above with respect to the indemnification of the Investor, if
requested.

                 (b)      Indemnification By Holder of Registrable Securities.
The Investor agrees to indemnify and hold harmless the Company and its trust
managers, officers, employees and agents, and each Person who controls the
Company (within the meaning of Section 15 of the Securities Act or Section 20
of the Exchange Act) against any losses, claims, damages, liabilities and
reasonable expenses resulting from any untrue statement of a material fact or
any omission of a material fact required to be stated in the Registration
Statement or Prospectus or preliminary prospectus or necessary to make the
statements therein not misleading, to the extent, but only to the extent, that
such untrue statement or omission is contained in any information or affidavit
so furnished in writing by the Investor to the Company specifically for
inclusion in such Registration Statement or Prospectus.  In no event shall the
liability of the Investor hereunder be greater in amount than the





                                       11
<PAGE>   12
dollar amount of the proceeds received by such Person upon the sale of the
Registrable Securities giving rise to such indemnification obligation.  The
Company shall be entitled to receive indemnities from underwriters, selling
brokers, dealer managers and similar securities industry professionals
participating in the distribution, to the same extent as provided above with
respect to information so furnished in writing by such Persons specifically for
inclusion in any Prospectus or Registration Statement.

                 (c)      Conduct of Indemnification Proceedings.  Any Person
entitled to indemnification hereunder will (i) give prompt notice (and in any
event within 10 days) to the indemnifying party of any claim with respect to
which it seeks indemnification and (ii) permit such indemnifying party to
assume the defense of such claim with counsel reasonably satisfactory to the
indemnified party; provided, however that any Person entitled to
indemnification hereunder shall have the right to employ separate counsel and
to participate in the defense of such claim, but the fees and expenses of such
counsel shall be at the expense of such Person unless (a) the indemnifying
party has agreed to pay such fees or expenses, (b) the indemnifying party shall
have failed to assume the defense of such claim and employ counsel reasonably
satisfactory to such Person or (c) based upon written advice of counsel to such
Person, there shall be one or more defenses available to such Person that are
not available to the indemnifying party or there shall exist conflicts of
interest pursuant to applicable rules of professional conduct between such
Person and the indemnifying party (in which case, if the Person notifies the
indemnifying party in writing that such Person elects to employ separate
counsel at the expense of the indemnifying party, the indemnifying party shall
not have the right to assume the defense of such claim on behalf of such
Person), in each of which events the fees and expenses of such counsel shall be
at the expense of the indemnifying party.  The indemnifying party will not be
subject to any liability for any settlement made without its consent (but such
consent will not be unreasonably withheld), but if settled with its written
consent, or if there be a final judgment for the plaintiff in any such action
or proceeding, the indemnifying party shall indemnify and hold harmless the
indemnified parties from and against any loss or liability (to the extent
stated above) by reason of such settlement or judgment.  No indemnified party
will be required to consent to entry of any judgment or enter into any
settlement which does not include as an unconditional term thereof the giving
by the claimant or plaintiff to such indemnified party of a release from all
liability in respect to such claim or litigation.

                 (d)      Contribution.  If for any reason the indemnification
provided for in the preceding clauses (a) and (b) is unavailable to an
indemnified party or insufficient to hold it harmless as contemplated by the
preceding clauses (a) and (b), then the indemnifying party shall contribute to
the amount paid or payable by the indemnified party as a result of such loss,
claim, damage or liability in such proportion as is appropriate to reflect not
only the relative benefits received by the indemnified party and the
indemnifying party, but also the relative fault of the indemnified party and
the indemnifying party, as well as any other relevant equitable considerations,
provided, that in no event shall the Investor be required to contribute an
amount greater than the dollar amount of the proceeds received by Investor with
respect to the sale of the Registrable Securities giving rise to such
indemnification obligation.  The relative fault of the Company on the one hand
and of the Investor on the other shall be determined by reference to, among
other things, whether the untrue or alleged





                                       12
<PAGE>   13
untrue statement of a material fact or the omission or alleged omission to
state a material fact relates to information supplied by such party, and the
parties' relative intent, knowledge, access to information, and opportunity to
correct or prevent such statement or omission.  No Person guilty of fraudulent
misrepresentation (within the meaning of Section 10(f) of the Securities Act)
shall be entitled to contribution from any Person who was not guilty of such
fraudulent misrepresentation.

         7.      Rule 144.  The Company hereby agrees that it will file the
reports required to be filed by it under the Securities Act and the Exchange
Act and the rules and regulations adopted by the SEC thereunder (or, if the
Company is not required to file such reports, it will, upon the request of the
Investor, make publicly available other information so long as necessary to
permit sales pursuant to Rule 144 under the Securities Act), and it will take
such further action as the Investor may reasonably request, all to the extent
required from time to time to enable the Investor to sell Registrable
Securities without registration under the Securities Act within the limitation
of the exemptions provided by (a) Rule 144 under the Securities Act, as such
Rule may be amended from time to time, or (b) any similar rule or regulation
hereafter adopted by the SEC.  Upon the request of the Investor, the Company
will deliver to the Investor a written statement as to whether it has complied
with such information and requirements.

         8.      Participation in Underwritten Registrations.

                 (a)      If any of the Registrable Securities covered by the
Shelf Registration are to be sold in an Underwritten Offering (excluding under
Section 2(c)), the investment banker or investment bankers and manager or
managers that will administer the offering will be selected by the Investor;
provided that such investment bankers and managers must be reasonably
satisfactory to the Company.

                 (b)      No Person may participate in any Underwritten
Registration hereunder unless such Person (i) agrees to sell such Person's
securities on the basis provided in any underwriting arrangements approved by
the Persons entitled hereunder to approve such arrangements and (ii) completes
and executes all questionnaires, powers of attorney, indemnities, underwriting
agreements and other documents required under the terms of such underwriting
arrangements.  Nothing in this Section 8 shall be construed to create any
additional rights regarding the registration of Registrable Securities in any
Person otherwise than as set forth herein.

         9.      Miscellaneous.

                 (a)      Remedies.  Each party hereto, in addition to being
entitled to exercise all rights provided herein or granted by law, including
recovery of damages, will be entitled to specific performance of its rights
under this Agreement to the extent available under applicable law.  Each party
hereto agrees that monetary damages would not be adequate compensation for any
loss incurred by reason of a breach by it of the provisions of this Agreement
and hereby agrees to waive the defense in any action for specific performance
that a remedy at law would be adequate.





                                       13
<PAGE>   14
                 (b)      Third Party Registration Rights.  The Company will
not  after the date of this Agreement, enter into any agreement granting
registration rights to any other Person with respect to the securities of the
Company that are not junior or subordinate to the rights granted to the
Investor hereunder without the written consent of the Investor.

                 (c)      Amendments and Waivers.  The provisions of this
Agreement, including the provisions of this sentence, may not be amended,
modified or supplemented, and waivers or consents to departures from the
provisions hereof may not be given without the written consent of the Company
and Investor.

                 (d)      Notices. The notice provision contained in Section
9(d) of the Purchase Agreement shall be incorporated herein and shall be
governing under this Agreement.

                 (e)      Successors and Assigns.  This Agreement shall inure
to the benefit of and be binding upon the successors and assigns of each of the
parties, including without limitation and without the need for an express
assignment, subsequent holders of Registrable Securities,  provided further,
that the Company cannot assign its rights hereunder except pursuant to a
merger.

                 (f)      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.

                 (g)      Headings.  The headings in this Agreement are for
convenience of reference only and shall not limit or otherwise affect the
meaning hereof.

                 (h)      Governing Law.  THIS AGREEMENT, AND THE RIGHTS AND
OBLIGATIONS OF THE PARTIES HERETO, SHALL BE GOVERNED BY AND CONSTRUED AND
ENFORCED IN ACCORDANCE WITH THE INTERNAL SUBSTANTIVE LAWS OF THE STATE OF
TEXAS, WITHOUT REGARD TO ITS PRINCIPLES OF CONFLICTS OF LAWS.

                 (i)      Severability.  If any provision of this Agreement is
held to be illegal, invalid or unenforceable under any current or future law,
and if the rights or obligations of the parties under this Agreement would not
be materially and adversely affected thereby, such provision shall be fully
separable, and this Agreement shall be construed and enforced as if such
illegal, invalid or unenforceable provision had never comprised a part thereof,
and the remaining provisions of this Agreement shall remain in full force and
effect and shall not be affected by the illegal, invalid or unenforceable
provision or by its severance therefrom.  In lieu of such illegal, invalid or
unenforceable provision, there shall be added simultaneously as a part of this
Agreement, a legal, valid and enforceable provision as similar in terms to such
illegal, invalid or unenforceable provision as may be possible, and the parties
hereto request the court or any arbitrator to whom disputes relating to this
Agreement are submitted to reform the otherwise illegal, invalid or
unenforceable provision in accordance with this Section 9(i).





                                       14
<PAGE>   15
                 (j)      Arbitration.  In the event of a dispute hereunder
which cannot be resolved by the parties, such dispute shall be settled by
arbitration in accordance with the Commercial Arbitration Rules of the American
Arbitration Association and judgment on the award rendered by the arbitration
panel may be entered in any court or tribunal of competent jurisdiction.  Any
arbitration occurring under this Section 9(j) shall be held in Dallas, Texas.

                 (k)      Entire Agreement.  This Agreement is intended by the
parties as a final expression of their agreement and intended to be a complete
and exclusive statement of the agreement and understanding of the parties
hereto in respect of the subject matter contained herein.  This Agreement
supersedes all prior agreements and understandings between the parties with
respect to such subject matter, including, but not limited to, the Prior
Registration Rights Agreement.

                 (l)      Attorneys' Fees.  In any proceeding brought to
enforce any provision of this Agreement the successful party shall be entitled
to recover reasonable attorneys' and accountants' fees in addition to its costs
and expenses and any other available remedy.

                 (m)      Representation of the Trust.  The Trust hereby
represents and warrants to Investor that the rights granted to Investor
hereunder are pari passu to the registration rights granted by the Trust to
each of Praedium, the Morgan Entities, the LaSalle Entities and DDR.

         IN WITNESS WHEREOF, the parties hereto have executed this Second
Amended and Restated Registration Rights Agreement as of the date first written
above.


                                  "COMPANY"
                                   
                                  AMERICAN INDUSTRIAL PROPERTIES REIT
                                   
                                   
                                      /s/ Charles W. Wolcott                   
                                  ---------------------------------------------
                                   

                                  Charles W.  Wolcott
                                  President and Chief Executive Officer
                                   
                                   
                                  "INVESTOR"
                                   
                                  USAA REAL ESTATE COMPANY
                                   
                                   
                                    /s/ T. Patrick Duncan                      
                                  ---------------------------------------------
                                   

                                  T. Patrick Duncan
                                  Senior Vice President - Real Estate Operations
                          




                                       15

<PAGE>   1
                                                                    EXHIBIT 10.5




                         REGISTRATION RIGHTS AGREEMENT

                 This Registration Rights Agreement (the "AGREEMENT") is made
and entered into as of  July 30, 1998, by and between American Industrial
Properties REIT, a Texas real estate investment trust (the "COMPANY"), and
Developers Diversified Realty Corporation, an Ohio corporation  ("Investor").


                                  WITNESSETH:

                 WHEREAS, pursuant to that certain Share Purchase Agreement
(the "Purchase Agreement") dated as of July 30, 1998, between the Company and
Investor, Investor has agreed to purchase up to 6,137,251 Common Shares from
the Company;

                 WHEREAS, pursuant to that certain Merger Agreement dated as of
July 30, 1998, by and among the Trust, Investor and DDR Office Flex
Corporation, a Delaware corporation, Investor will acquire 1,258,478 Common
Shares (collectively with the 6,137,251 Common Shares, the "Shares") from the
Company;

                 WHEREAS, pursuant to the terms of the Share Purchase
Agreement, the Company and Investor agreed that the Company would grant certain
registration rights to Investor with respect to the Shares;

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

         1.      Definitions.

                 As used in this Agreement, the following capitalized terms
shall have the following meanings:

                 Closing Date: The closing date as defined in the Purchase 
Agreement.

                 Common Shares: The common shares of beneficial interest, $0.10
par value per share, of the Company.

                 Exchange Act: The Securities Exchange Act of 1934, as amended 
from time to time.

                 Person: An individual, partnership, corporation, limited
liability company, trust or unincorporated organization, or a government or
agency or political subdivision thereof.



                                      1
<PAGE>   2
                 Prospectus: The prospectus included in any Registration
Statement, as amended or supplemented by any prospectus supplement with respect
to the terms of the offering of any portion of the Registrable Securities
covered by such Registration Statement and by all other amendments and
supplements to the prospectus, including post-effective amendments and all
material incorporated by reference in such prospectus.

                 Purchase Agreement: As defined in the Recitals to this
Agreement.

                 Purchasers: See Section 2(b) hereof.

                 Registrable Securities: (a) The Shares and (b) any securities
issued or issuable with respect to the Shares by way of share dividend or share
split or in connection with a combination of shares, recapitalization, merger,
consolidation or other reorganization or otherwise.  Any Registrable Security
will cease to be a Registrable Security when (i) a registration statement
covering such Registrable Security has been declared effective by the SEC and
the Registrable Security has been disposed of pursuant to such effective
registration statement, (ii) the Registrable Security is sold under
circumstances in which all of the applicable conditions of Rule l44 (or any
similar provisions then in force) under the Securities Act are met, or (iii)
the Registrable Security has been otherwise transferred, the Company has
delivered a new certificate or other evidence of ownership for it not bearing a
legend restricting further transfer, and it may be resold without subsequent
registration under the Securities Act.

                 Registration Expenses: See Section 5 hereof.

                 Registration Statement: The Registration Statement of the
Company that covers any of the Registrable Securities pursuant to the
provisions of this Agreement, including the Prospectus included therein, all
amendments and supplements to such Registration Statement, including
post-effective amendments, all exhibits and all material incorporated by
reference in such Registration Statement.

                 SEC: The Securities and Exchange Commission or any successor
entity.

                 Securities Act: The Securities Act of 1933, as amended from
time to time.

                 Shares: As defined in the Recitals to this Agreement.

                 Shelf Registration: See Section 2(a) hereof.

                 Underwritten Registration or Underwritten Offering: A
registration in which securities of the Company are sold to an underwriter for
reoffering to the public.





                                       2
<PAGE>   3
         2.      Registration Rights.

                 (a)      Shelf Registration.  Upon the written request of the
Investor, the Company will file a "shelf" registration statement on any
appropriate form pursuant to Rule 415 (or similar rule that may be adopted by
the SEC) under the Securities Act (a "SHELF REGISTRATION"), which Shelf
Registration will cover the Registrable Securities that the Company has been so
requested to register by the Investor.

                 The Company hereby agrees to file such registration statement
as promptly as practicable following the request therefor, and in any event
within 60 days following the date such request is received by the Company, and
thereafter to use its commercially reasonable efforts to cause such Shelf
Registration to become effective and thereafter to keep it continuously
effective, and to prevent the happening of any event of the kind described in
Section 4(c)(3), (4), (5) or (6) hereof that requires the Company to give
notice pursuant to the last paragraph of Section 4 hereof, for a period
terminating on the third year anniversary of the date on which the SEC declares
the Shelf Registration effective, or such shorter period as shall terminate on
the date on which all the Registrable Securities covered by the Shelf
Registration have been sold pursuant to such Shelf Registration.  The Company
shall be obligated to file only one Shelf Registration and shall not be
obligated to file a Shelf Registration if three Demand Registrations
(hereinafter defined) have been effected under Section 2(b).

         The Company further agrees to promptly supplement or make amendments
to the Shelf Registration, if required by the rules, regulations or
instructions applicable to the registration form utilized by the Company or by
the Securities Act or rules and regulations thereunder for shelf registration
or if requested by the Investor.

         If the Investor so elects, the offering of Registrable Securities
pursuant to such registration shall be in the form of an Underwritten Offering.

                 (b)      Demand Registration.  At any time during the five
year period following the Closing Date, the Investor  may make a written
request (the "DEMAND NOTICE") for registration under the Securities Act (a
"DEMAND REGISTRATION") of its Registrable Securities. The Demand Notice will
specify the number of shares of Registrable Securities proposed to be sold and
will also specify the intended method of disposition thereof.  Following
receipt of a Demand Notice from the Investor, the Company promptly will file a
registration statement on any appropriate form which will cover the Registrable
Securities that the Company has been so requested to register by the Investor.

         Unless the Investor shall consent in writing, no party (including the
Company) other than  _USAA Real Estate Company ("USAA"), Praedium II Industrial
Associates LLC ("Praedium"),  MS Real Estate Special Situations Inc. ("MRSE"),
certain clients of  Morgan Stanley Asset Management Inc. who have purchased
Common Shares of the Company (such clients together with MRSE, the "Morgan
Entities"), LaSalle Advisors Limited Partnership acting as agent for and on
behalf of certain clients ("LaSalle"), or ABKB/LaSalle Securities Limited
Partnership ("ABKB" and together





                                       3
<PAGE>   4
with LaSalle, the "LaSalle Entities") shall be permitted to offer securities
under any such Demand Registration.  The Company shall not be required to
effect more than three Demand Registrations under this Section 2(b).  A
registration requested pursuant to this Section 2(b) will not be deemed to have
been effected (and it shall not count as one of the three Demand Registrations)
unless the Registration Statement relating thereto has become effective under
the Securities Act; provided, however that if, after such Registration
Statement has become effective, the offering of the Registrable Securities
pursuant to such registration is interfered with by any stop order, injunction
or other order or requirement of the SEC or any other governmental agency or
court, such registration will be deemed not to have been effected (and it shall
not count as one of the three Demand Registrations). The Investor may at any
time prior to the effective date of the Registration Statement relating to such
registration revoke a Demand Notice by providing a written notice to the
Company (in which case such Demand Registration shall not count as one of the
three Demand Registrations).

         If the Investor so elects, the offering of Registrable Securities
pursuant to such registration shall be in the form of an Underwritten Offering.
If the managing underwriter or underwriters of such offering advise the Company
and the Investor in writing that in their opinion the number of shares of
Registrable Securities and shares of USAA, Praedium, the Morgan Entities or the
LaSalle Entities, if any,  requested to be included in such offering is
sufficiently large to materially and adversely affect the success of such
offering, the Company will include in such registration the aggregate number of
Registrable Securities and shares of USAA, Praedium, the Morgan Entities or the
LaSalle Entities, if any, requested to be included,  which in the opinion of
such managing underwriter or underwriters can be sold without any such material
adverse effect; provided, however, that no Registrable Securities or shares of
USAA, Praedium, the Morgan Entities or the LaSalle Entities, if any, may be
excluded before all shares proposed to be sold by other parties, including the
Company, have been excluded.  If  any Registrable Securities are excluded, such
registration shall not count as one of the three Demand Registrations.  If the
amount of Registrable Securities proposed to be registered hereunder are
required to be excluded pursuant to this paragraph, the number of Registrable
Securities of the Investor and the number of shares of USAA, Praedium, the
Morgan Entities or the LaSalle Entities, if any, to be included in such
Registration shall be reduced pro rata (according to the total number of
Registrable Securities or shares, as the case may be, beneficially owned by
each such holder), to the extent necessary to reduce the total amount necessary
to be included in the Offering to the amount recommended by such managing
underwriter or underwriters.

         No registration pursuant to a request or requests referred to in this
subsection 2(b) shall be deemed to be a Shelf Registration.

                 (c)      Incidental Registration.  If at any time during the
five year period following the Closing Date, the Company proposes to file a
registration statement under the Securities Act (other than in connection with
a Registration Statement on Form S-4 or S-8, or any form that is substituting
therefor or is a successor thereto) with respect to an offering of any class of
security by the Company for its own account or for the account of any of its
security holders, then the Company





                                       4
<PAGE>   5
shall give written notice of such proposed filing to the Investor as soon as
practicable (but in no event less than 30 days before the anticipated filing
date), and such notice shall (i) offer the Investor the opportunity to register
such number of Registrable Securities as it may request and (ii) describe such
securities and specify the form and manner and other relevant facts involved in
such proposed registration (including, without limitation, (x) whether or not
such registration will be in connection with an Underwritten Offering and, if
so, the identity of the managing underwriter and whether such Underwritten
Offering will be pursuant to a "best efforts" or "firm commitment" underwriting
and (y) the price (net of any underwriting commissions, discounts and the like)
at which the Registrable Securities are reasonably expected to be sold, if such
disclosure is acceptable to the managing underwriter). The Investor  shall
advise the Company in writing within 20 days after the date of receipt of such
notice from the Company of the number of Registrable Securities for which
registration is requested.  The Company shall include in such Registration
Statement all such Registrable Securities so requested to be included therein,
and, if such registration is an Underwritten Registration, the Company shall
use its commercially reasonable efforts to cause the managing underwriter or
underwriters to permit the Registrable Securities requested to be included in
the registration statement for such offering to be included (on the same terms
and conditions as similar securities of the Company included therein to the
extent appropriate); provided, however, that if the managing underwriter or
underwriters of such offering deliver a written opinion to the Investor that
either because of (i) the kind of securities which the Investor, the Company,
or any other Persons intend to include in such offering or (ii) the size of the
offering which the Investor, the Company, or such other Persons intend to make,
the success of the offering would be materially and adversely affected by
inclusion of the Registrable Securities requested to be included, then (A) in
the event that the size of the offering is the basis of such managing
underwriter's opinion, the amount of securities to be offered for the account
of the Investor and other holders registering securities of the Company
pursuant to similar incidental registration rights shall be reduced pro rata
(according to the Registrable Securities beneficially owned by each such
holder) to the extent necessary to reduce the total amount of securities to be
included in such offering to the amount recommended by such managing
underwriter or underwriters; and (B) in the event that the combination of
securities to be offered is the basis of such managing underwriter's opinion,
(x) the Registrable Securities and other securities to be included in such
offering shall be reduced as described in clause (A) above or, (y) if the
actions described in clause (A) would, in the judgment of the managing
underwriter and pursuant to a written opinion delivered to the Investor, be
insufficient to substantially eliminate the adverse effect that inclusion of
the Registrable Securities requested to be included would have on such
offering, such Registrable Securities will be excluded from such offering.
Notwithstanding the foregoing, if the Investor exercises an incidental
registration in connection with USAA's or  Praedium's or the Morgan Entities'
or LaSalle Entities' demand registration rights, then the managing
underwriter's cutback provision under the demand registration right set forth
in Section 2(b) shall govern with respect to the Investor and not the managing
underwriter's cutback provision in this Section 2(c).

         No registration pursuant to a request or requests referred to in this
subsection 2(c) shall be deemed to be a Shelf Registration.





                                       5
<PAGE>   6
         3.      Hold-Back Agreements.

                 (a)      Restrictions on Public Sale by Holder of Registrable
Securities. The Investor agrees, if reasonably requested by the managing
underwriters in an Underwritten Offering, not to effect any public sale or
distribution of securities of the Company of the same class as the securities
included in the Registration Statement relating to such Underwritten Offering,
including a sale pursuant to Rule 144 under the Securities Act (except as part
of such Underwritten Offering), during the 10-day period prior to the filing of
such Registration Statement, and during the 90-day period beginning on the
closing date of each Underwritten Offering made pursuant to such Registration
Statement, to the extent timely notified in writing by the Company or the
managing underwriters.

                 (b)      Restrictions on Sale of Securities by the Company.
The Company agrees not to effect any public sale or distribution of any
securities similar to those being registered, or any securities convertible
into or exchangeable or exercisable for such securities (except pursuant to a
registration statement on Form S-4 or S-8, or any substitute form that may be
adopted by the SEC) during the ten days prior to the filing of a registration
statement with respect to an Underwritten Offering, and during the 90-day
period beginning on the effective date of such Registration Statement (except
as part of such registration statement (x) where the Investor participating in
such registration statement consents, (y) where the Investor is participating
in such registration statement pursuant to Section 2(c) hereof, such
registration statement was filed by the Company with respect to the sale of
securities by the Company, and the Investor is not simultaneously participating
in a registration statement pursuant to Section 2(b) hereof), or (z) with
respect to USAA, Praedium, the Morgan Entities or the LaSalle Entities, if such
parties are participating in a Demand Registration pursuant to Section 2(b)
hereof), or the commencement of a public distribution of Registrable Securities
pursuant to such registration statement.

         4.      Registration Procedures.  In connection with the Company's
registration obligations pursuant to Section 2 hereof, the Company will use its
commercially reasonable efforts to effect such registration to permit the sale
of such Registrable Securities in accordance with the intended method or
methods of distribution thereof, and pursuant thereto the Company will use
commercially reasonable efforts to as expeditiously as possible:

                 (a)      prepare and file with the SEC, as soon as
practicable, and in any event within 60 days from the date of request, a
Registration Statement relating to the applicable registration on any
appropriate form under the Securities Act, which forms shall be available for
the sale of the Registrable Securities in accordance with the intended method
or methods of distribution thereof and shall include all financial statements
of the Company, and use its commercially reasonable efforts to cause such
Registration Statement to become effective; provided that before filing a
Registration Statement or Prospectus or any amendments or supplements thereto,
including documents incorporated by reference after the initial filing of the
Registration Statement, the Company will furnish the Investor and the
underwriters, if any, copies of all such documents proposed to be filed, which
documents will be subject to the review of the Investor and the underwriters,
if any, and the Company will not file any Registration Statement or amendment
thereto or any Prospectus or any





                                       6
<PAGE>   7
supplement thereto (including such documents incorporated by reference) to
which the Investor or the underwriters, if any, shall reasonably object (except
in the case of a filing pursuant to Section 2(c) hereof);

                 (b)      prepare and file with the SEC such amendments and
post-effective amendments to the Registration Statement as may be necessary to
keep the Registration Statement effective for the applicable period, or such
shorter period, which will terminate when all Registrable Securities included
in such Registration Statement have been sold; cause the Prospectus to be
supplemented by any required Prospectus supplement, and as so supplemented to
be filed pursuant to Rule 424 under the Securities Act; and comply with the
provisions of all securities included in such Registration Statement during the
applicable period in accordance with the intended method or methods of
distribution by the sellers thereof set forth in such Registration Statement or
supplement to the Prospectus; the Company shall not be deemed to have used
commercially reasonable efforts to keep a Registration Statement effective
during the applicable period if it voluntarily takes any action that would
result in the Investor not being able to sell its Registrable Securities during
that period unless such action is required under applicable law; provided that
the foregoing shall not apply to actions taken by the Company in good faith and
for valid business reasons, including without limitation the acquisition or
divestiture of assets, so long as the Company promptly thereafter complies with
the requirements of Section 4(k) hereof, if applicable;

                 (c)      notify the Investor and the managing underwriters, if
any, promptly (and in no event more than three days after the occurrence of any
of the following events), and (if requested by any such Person) confirm such
advice in writing, (l) when the Prospectus or any Prospectus supplement or
post-effective amendment has been filed, and, with respect to the Registration
Statement or any post-effective amendment, when the same has become effective,
(2) of any request by the SEC for amendments or supplements to the Registration
Statement or the Prospectus or for additional information, (3) of the issuance
by the SEC of any stop order suspending the effectiveness of the Registration
Statement or the initiation of any proceedings for that purpose, (4) if at any
time the representations and warranties of the Company contemplated by
paragraph (m) below cease to be true and correct, (5) of the receipt by the
Company of any notification with respect to the suspension of the qualification
of the Registrable Securities for sale in any jurisdiction or the initiation or
threatening of any proceeding for such purpose and (6) of the happening of any
event which makes any statement made in the Registration Statement, the
Prospectus or any document incorporated therein by reference untrue or which
requires the making of any changes in the Registration Statement, the
Prospectus or any document incorporated therein by reference in order to make
the statements therein not misleading;

                 (d)      obtain the withdrawal of any order suspending the
effectiveness of the Registration Statement at the earliest possible moment;

                 (e)      if reasonably requested by the managing underwriter
or underwriters or by the Investor, promptly incorporate in a Prospectus
supplement or post-effective amendment such information as the managing
underwriters and the Investor agree should be included therein relating





                                       7
<PAGE>   8
to the sale of the Registrable Securities, including, without limitation,
information with respect to the number of Registrable Securities being sold to
such underwriters, the purchase price being paid therefor by such underwriters
and with respect to any other terms of the Underwritten (or best efforts
underwritten) Offering of the Registrable Securities to be sold in such
offering; and make all required filings of such Prospectus supplement or
post-effective amendment as soon as notified of the matters to be incorporated
in such Prospectus supplement or post-effective amendment;

                 (f)      furnish to the Investor and each managing
underwriter, if any, without charge, at least one signed copy of the
Registration Statement and any post-effective amendment thereto, including
financial statements and schedules, all documents incorporated therein by
reference and all exhibits (including those incorporated by reference);

                 (g)      deliver to the Investor and the underwriters, if any,
without charge, as many copies of the Prospectus (including each preliminary
prospectus) and any amendment or supplement thereto as such Persons may
reasonably request; the Company consents to the use of the Prospectus or any
amendment or supplement thereto by the Investor and the underwriters, if any,
in connection with the offering and sale of the Registrable Securities covered
by the Prospectus or any amendment or supplement thereto;

                 (h)      prior to any public offering of Registrable
Securities, register or qualify or cooperate with the Investor, the
underwriters, if any, and their respective counsel in connection with the
registration or qualification of such Registrable Securities for offer and sale
under the securities or blue sky laws of such jurisdictions as the Investor or
any underwriter reasonably requests in writing and do any and all other acts or
things necessary or advisable to enable the disposition in such jurisdictions
of the Registrable Securities covered by the Registration Statement;

                 (i)      cooperate with the Investor and the managing
underwriters, if any, to facilitate the timely preparation and delivery of
certificates representing Registrable Securities to be sold and not bearing any
restrictive legends (except as reasonably required to protect the Company's
status as a REIT); and enable such Registrable Securities to be in such
denominations and registered in such names as the managing underwriters may
request at least two business days prior to any sale of Registrable Securities
to the underwriters;

                 (j)      cause the Registrable Securities covered by the
applicable Registration Statement to be registered with or approved by such
other governmental agencies or authorities as may be necessary to enable the
Investor or the underwriters, if any, to consummate the disposition of such
Registrable Securities;

                 (k)      upon the occurrence of any event contemplated by
Section 4(c)(6) above, prepare a supplement or post-effective amendment to the
Registration Statement or the related Prospectus or any document incorporated
therein by reference or file any other required document so that, as thereafter
delivered to the purchasers of the Registrable Securities, the Prospectus will
not contain an untrue statement of a material fact or omit to state any
material fact necessary to make the statements therein not misleading;





                                       8
<PAGE>   9
                 (l)      cause all Registrable Securities covered by the
Registration Statement to be listed on each securities exchange on which
similar securities issued by the Company are then listed;

                 (m)      enter into such agreements (including an underwriting
agreement) and take all such other actions in connection therewith in order to
expedite or facilitate the disposition of such Registrable Securities and in
connection therewith, whether or not an underwriting agreement is entered into
and whether or not the registration is an Underwritten Registration, (1) make
such representations and warranties to the Investor and the underwriters, if
any, in form, substance and scope as are customarily made by issuers to
underwriters in primary underwritten offerings; (2) obtain opinions of counsel
to the Company and updates thereof (which counsel and opinions (in form, scope
and substance) shall be reasonably satisfactory to the Investor and the
managing underwriters, if any, covering the matters customarily covered in
opinions requested in Underwritten Offerings and such other matters as may be
reasonably requested by the Investor and the underwriters, if any; (3) obtain
"cold comfort" letters and updates thereof from the Company's independent
certified public accountants addressed to the Investor and the underwriters, if
any, such letters to be in customary form and covering matters of the type
customarily covered in "cold comfort" letters by underwriters in connection
with primary Underwritten Offerings; (4) if an underwriting agreement is
entered into, the same shall set forth in full the indemnification provisions
and procedures of Section 6 hereof with respect to all parties to be
indemnified pursuant to said Section; and (5) deliver such documents and
certificates as may be reasonably requested by the Investor and the managing
underwriters, if any, to evidence compliance with clause (1) above and with any
customary conditions contained in the underwriting agreement or other agreement
entered into by the Company.  The above shall be done at each closing under
such underwriting or similar agreement or as and to the extent required
thereunder;

                 (n)      make available for inspection by a representative of
the Investor, any underwriter participating in any disposition pursuant to such
registration, and any attorney or accountant retained by the Investor or any
underwriter, all financial and other records, pertinent corporate documents and
properties of the Company and cause the Company's officers, trust managers and
employees to supply all information reasonably requested by any such
representative, underwriter, attorney or accountant in connection with such
registration; provided that any records, information or documents that the
Company designates in writing as confidential shall be kept confidential by
such Persons unless disclosure of such records, information or documents is
required by court or administrative order;

                 (o)      otherwise use its commercially reasonable efforts to
comply with all applicable rules and regulations of the SEC, and make available
to its security holders, as soon as reasonably practicable, an earnings
statement covering a period of 12 months, beginning within three months after
the effective date of the registration statement, which earnings statement
shall satisfy the provisions of section 11(a) of the Securities Act; and





                                       9
<PAGE>   10
                 (p)      cooperate with the Investor and each underwriter
participating in the disposition of such Registrable Securities and their
respective counsel in connection with any filings required to be made with the
National Association of Securities Dealers, Inc. (the "NASD").

         The Company may require the Investor to furnish to the Company such
information regarding the distribution of Registrable Securities as the Company
may from time to time reasonably request in writing.

         The Investor agrees by acquisition of the Registrable Securities that,
upon receipt of any notice from the Company of the happening of any event of
the kind described in Section 4(k) hereof, the Investor will forthwith
discontinue disposition of Registrable Securities until the Investor's receipt
of the copies of the supplemented or amended Prospectus contemplated by Section
4(k) hereof, or until it is advised in writing (the "ADVICE") by the Company
that the use of the Prospectus may be resumed, and has received copies of any
additional or supplemental filings which are incorporated by reference in the
Prospectus, and, if so directed by the Company, the Investor will deliver to
the Company (at the Company's expense), all copies, other than permanent file
copies then in the Investor's possession, of the Prospectus covering such
Registrable Securities current at the time of receipt of such notice.  In the
event the Company shall give any such notice, the time periods regarding the
effectiveness of Registration Statements set forth in Section 2 hereof and
Section 4(b) hereof shall be extended by the number of days during the period
from and including the date of the giving of such notice pursuant to Section
4(c)(6) hereof to the date when the Investor shall receive copies of the
supplemented or amended prospectus contemplated by Section 4(k) hereof or the
Advice.

         5.      Registration Expenses.  All expenses incident to the Company's
performance of or compliance with this Agreement, including without limitation:
all registration and filing fees; fees with respect to filings required to be
made with the NASD; fees and expenses of compliance with securities or blue sky
laws (including reasonable fees and disbursements of counsel for the
underwriters or the Investor in connection with blue sky qualifications of the
Registrable Securities and determination of their eligibility for investment
under the laws of such jurisdictions as the managing underwriters and the
Investor may designate); printing expenses, messenger, telephone and delivery
expenses; fees and disbursements of counsel for the Company and fees and
expenses for independent certified public accountants retained by the Company
(including the expenses of any comfort letters or costs associated with the
delivery by independent certified public accountants of a comfort letter or
comfort letters requested pursuant to Section 4(m) hereof); securities acts
liability insurance, if the Company so desires; all internal expenses of the
Company (including, without limitation, all salaries and expenses of its
officers and employees performing legal or accounting duties); the expense of
any annual audit; the fees and expenses incurred in connection with the listing
of the securities to be registered on each securities exchange on which similar
securities issued by the Company are then listed; and the fees and expenses of
any Person, including special experts, retained by the Company (all such
expenses being herein called "REGISTRATION EXPENSES") will be borne by the
Company regardless of whether the Registration Statement becomes effective.
The Company shall not have any obligation to pay any underwriting fees,
discounts or commissions





                                       10
<PAGE>   11
attributable to the sale of Registrable Securities, or any legal fees and
expenses of counsel to the Investor, except as expressly provided herein.

         6.      Indemnification: Contribution.

                 (a)      Indemnification by Company.  The Company agrees to
indemnify and hold harmless the Investor and its partners, officers, directors,
employees and agents, and each Person who controls any such Persons (within the
meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act)
against all losses, claims, damages, liabilities and reasonable expenses
arising out of or based upon any untrue or alleged untrue statement of a
material fact contained in any Registration Statement, Prospectus or
preliminary 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 not misleading, except insofar as the same are caused by or contained
in any information furnished in writing to the Company by the Investor
expressly for use therein.  The Company will also indemnify underwriters,
selling brokers, dealer managers and similar securities industry professionals
participating in the distribution, their officers and trust managers and each
Person who controls such Persons (within the meaning of Section 15 of the
Securities Act or Section 20 of the Exchange Act) to the same extent as
provided above with respect to the indemnification of the Investor, if
requested.

                 (b)      Indemnification By Holder of Registrable Securities.
The Investor agrees to indemnify and hold harmless the Company and its trust
managers, officers, employees and agents, and each Person who controls the
Company (within the meaning of Section 15 of the Securities Act or Section 20
of the Exchange Act) against any losses, claims, damages, liabilities and
reasonable expenses resulting from any untrue statement of a material fact or
any omission of a material fact required to be stated in the Registration
Statement or Prospectus or preliminary prospectus or necessary to make the
statements therein not misleading, to the extent, but only to the extent, that
such untrue statement or omission is contained in any information or affidavit
so furnished in writing by the Investor to the Company specifically for
inclusion in such Registration Statement or Prospectus.  In no event shall the
liability of the Investor hereunder be greater in amount than the dollar amount
of the proceeds received by such Person upon the sale of the Registrable
Securities giving rise to such indemnification obligation.  The Company shall
be entitled to receive indemnities from underwriters, selling brokers, dealer
managers and similar securities industry professionals participating in the
distribution, to the same extent as provided above with respect to information
so furnished in writing by such Persons specifically for inclusion in any
Prospectus or Registration Statement.

                 (c)      Conduct of Indemnification Proceedings.  Any Person
entitled to indemnification hereunder will (i) give prompt notice (and in any
event within 10 days) to the indemnifying party of any claim with respect to
which it seeks indemnification and (ii) permit such indemnifying party to
assume the defense of such claim with counsel reasonably satisfactory to the
indemnified party; provided, however that any Person entitled to
indemnification hereunder shall have the right to employ separate counsel and
to participate in the defense of such claim, but the fees





                                       11
<PAGE>   12
and expenses of such counsel shall be at the expense of such Person unless (a)
the indemnifying party has agreed to pay such fees or expenses, (b) the
indemnifying party shall have failed to assume the defense of such claim and
employ counsel reasonably satisfactory to such Person or (c) based upon written
advice of counsel to such Person, there shall be one or more defenses available
to such Person that are not available to the indemnifying party or there shall
exist conflicts of interest pursuant to applicable rules of professional
conduct between such Person and the indemnifying party (in which case, if the
Person notifies the indemnifying party in writing that such Person elects to
employ separate counsel at the expense of the indemnifying party, the
indemnifying party shall not have the right to assume the defense of such claim
on behalf of such Person), in each of which events the fees and expenses of
such counsel shall be at the expense of the indemnifying party.  The
indemnifying party will not be subject to any liability for any settlement made
without its consent (but such consent will not be unreasonably withheld), but
if settled with its written consent, or if there be a final judgment for the
plaintiff in any such action or proceeding, the indemnifying party shall
indemnify and hold harmless the indemnified parties from and against any loss
or liability (to the extent stated above) by reason of such settlement or
judgment.  No indemnified party will be required to consent to entry of any
judgment or enter into any settlement which does not include as an
unconditional term thereof the giving by the claimant or plaintiff to such
indemnified party of a release from all liability in respect to such claim or
litigation.

                 (d)      Contribution.  If for any reason the indemnification
provided for in the preceding clauses (a) and (b) is unavailable to an
indemnified party or insufficient to hold it harmless as contemplated by the
preceding clauses (a) and (b), then the indemnifying party shall contribute to
the amount paid or payable by the indemnified party as a result of such loss,
claim, damage or liability in such proportion as is appropriate to reflect not
only the relative benefits received by the indemnified party and the
indemnifying party, but also the relative fault of the indemnified party and
the indemnifying party, as well as any other relevant equitable considerations,
provided, that in no event shall the Investor be required to contribute an
amount greater than the dollar amount of the proceeds received by Investor with
respect to the sale of the Registrable Securities giving rise to such
indemnification obligation.  The relative fault of the Company on the one hand
and of the Investor on the other shall be determined by reference to, among
other things, whether the untrue or alleged untrue statement of a material fact
or the omission or alleged omission to state a material fact relates to
information supplied by such party, and the parties' relative intent,
knowledge, access to information, and opportunity to correct or prevent such
statement or omission.  No Person guilty of fraudulent misrepresentation
(within the meaning of Section 10(f) of the Securities Act) shall be entitled
to contribution from any Person who was not guilty of such fraudulent
misrepresentation.

         7.      Rule 144.  The Company hereby agrees that it will file the
reports required to be filed by it under the Securities Act and the Exchange
Act and the rules and regulations adopted by the SEC thereunder (or, if the
Company is not required to file such reports, it will, upon the request of the
Investor, make publicly available other information so long as necessary to
permit sales pursuant to Rule 144 under the Securities Act), and it will take
such further action as the Investor may reasonably request, all to the extent
required from time to time to enable the Investor to sell Registrable
Securities without registration under the Securities Act within the limitation
of the





                                       12
<PAGE>   13
exemptions provided by (a) Rule 144 under the Securities Act, as such Rule may
be amended from time to time, or (b) any similar rule or regulation hereafter
adopted by the SEC.  Upon the request of the Investor, the Company will deliver
to the Investor a written statement as to whether it has complied with such
information and requirements.

         8.      Participation in Underwritten Registrations.

                 (a)      If any of the Registrable Securities covered by the
Shelf Registration are to be sold in an Underwritten Offering (excluding under
Section 2(c)), the investment banker or investment bankers and manager or
managers that will administer the offering will be selected by the Investor;
provided that such investment bankers and managers must be reasonably
satisfactory to the Company.

                 (b)      No Person may participate in any Underwritten
Registration hereunder unless such Person (i) agrees to sell such Person's
securities on the basis provided in any underwriting arrangements approved by
the Persons entitled hereunder to approve such arrangements and (ii) completes
and executes all questionnaires, powers of attorney, indemnities, underwriting
agreements and other documents required under the terms of such underwriting
arrangements.  Nothing in this Section 8 shall be construed to create any
additional rights regarding the registration of Registrable Securities in any
Person otherwise than as set forth herein.

         9.      Miscellaneous.

                 (a)      Remedies.  Each party hereto, in addition to being
entitled to exercise all rights provided herein or granted by law, including
recovery of damages, will be entitled to specific performance of its rights
under this Agreement to the extent available under applicable law.  Each party
hereto agrees that monetary damages would not be adequate compensation for any
loss incurred by reason of a breach by it of the provisions of this Agreement
and hereby agrees to waive the defense in any action for specific performance
that a remedy at law would be adequate.

                 (b)      Third Party Registration Rights.  The Company will
not  after the date of this Agreement, enter into any agreement granting
registration rights to any other Person with respect to the securities of the
Company that are not junior or subordinate to the rights granted to the
Investor hereunder without the written consent of the Investor.

                 (c)      Amendments and Waivers.  The provisions of this
Agreement, including the provisions of this sentence, may not be amended,
modified or supplemented, and waivers or consents to departures from the
provisions hereof may not be given without the written consent of the Company
and Investor.

                 (d)      Notices. The notice provision contained in Section
9(d) of the Purchase Agreement shall be incorporated herein and shall be
governing under this Agreement.





                                       13
<PAGE>   14
                 (e)      Successors and Assigns.  This Agreement shall inure
to the benefit of and be binding upon the successors and assigns of each of the
parties, including without limitation and without the need for an express
assignment, subsequent holders of Registrable Securities,  provided further,
that the Company cannot assign its rights hereunder except pursuant to a
merger.

                 (f)      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.

                 (g)      Headings.  The headings in this Agreement are for
convenience of reference only and shall not limit or otherwise affect the
meaning hereof.

                 (h)      Governing Law.  THIS AGREEMENT, AND THE RIGHTS AND
OBLIGATIONS OF THE PARTIES HERETO, SHALL BE GOVERNED BY AND CONSTRUED AND
ENFORCED IN ACCORDANCE WITH THE INTERNAL SUBSTANTIVE LAWS OF THE STATE OF
TEXAS, WITHOUT REGARD TO ITS PRINCIPLES OF CONFLICTS OF LAWS.

                 (i)      Severability.  If any provision of this Agreement is
held to be illegal, invalid or unenforceable under any current or future law,
and if the rights or obligations of the parties under this Agreement would not
be materially and adversely affected thereby, such provision shall be fully
separable, and this Agreement shall be construed and enforced as if such
illegal, invalid or unenforceable provision had never comprised a part thereof,
and the remaining provisions of this Agreement shall remain in full force and
effect and shall not be affected by the illegal, invalid or unenforceable
provision or by its severance therefrom.  In lieu of such illegal, invalid or
unenforceable provision, there shall be added simultaneously as a part of this
Agreement, a legal, valid and enforceable provision as similar in terms to such
illegal, invalid or unenforceable provision as may be possible, and the parties
hereto request the court or any arbitrator to whom disputes relating to this
Agreement are submitted to reform the otherwise illegal, invalid or
unenforceable provision in accordance with this Section 9(i).

                 (j)      Arbitration.  In the event of a dispute hereunder
which cannot be resolved by the parties, such dispute shall be settled by
arbitration in accordance with the Commercial Arbitration Rules of the American
Arbitration Association and judgment on the award rendered by the arbitration
panel may be entered in any court or tribunal of competent jurisdiction.  Any
arbitration occurring under this Section 9(j) shall be held in Dallas, Texas.

                 (k)      Entire Agreement.  This Agreement is intended by the
parties as a final expression of their agreement and intended to be a complete
and exclusive statement of the agreement and understanding of the parties
hereto in respect of the subject matter contained herein.  This Agreement
supersedes all prior agreements and understandings between the parties with
respect to such subject matter.





                                       14
<PAGE>   15
                 (l)      Attorneys' Fees.  In any proceeding brought to
enforce any provision of this Agreement the successful party shall be entitled
to recover reasonable attorneys' and accountants' fees in addition to its costs
and expenses and any other available remedy.

                 (m)      Representation of the Trust.  The Trust hereby
represents and warrants to Investor that the rights granted to Investor
hereunder are pari passu to the registration rights granted by the Trust to
each of USAA, Praedium, the Morgan Entities and the LaSalle Entities.


         IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the date first written above.


                                "COMPANY"
                                  
                                AMERICAN INDUSTRIAL PROPERTIES REIT,
                                a Texas real estate investment trust
                                  
                                  
                                By:    /s/ Charles W. Wolcott                 
                                    ------------------------------------------
                                Name: Charles W. Wolcott                     
                                      ----------------------------------------
                                Title:    President and Chief Executive Officer
                                      ----------------------------------------



                                "INVESTOR"
                                
                                DEVELOPERS DIVERSIFIED REALTY CORPORATION,
                                an Ohio corporation
                                
                                
                                
                                By: /s/ Joan U. Allgood                       
                                   -------------------------------------------
                                Name: Joan U. Allgood                         
                                     -----------------------------------------
                                Title: Vice President                         
                                      ----------------------------------------





                                       15

<PAGE>   1
                                                                    EXHIBIT 10.6


            FIRST AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT

                  This First Amended and Restated Registration Rights Agreement
(the "AGREEMENT") is made and entered into as of July 30, 1998, by and between
American Industrial Properties REIT, a Texas real estate investment trust (the
"COMPANY"), and Praedium II Industrial Associates LLC, a Delaware limited
liability company (the "Investor").

                                   WITNESSETH:

                  WHEREAS, pursuant to certain Common Share Purchase Agreement,
dated as of January 29, 1998, between the Company and the Investor (the
"PURCHASE AGREEMENT"), the Investor purchased 733,945 Common Shares (the
"SHARES") of the Company;

                  WHEREAS, pursuant to the terms of the Purchase Agreement, the
Company and the Investor agreed that the Company would grant certain
registration rights to the Investor with respect to the Shares;

                  WHEREAS, the Company and the Investor entered into a
Registration Rights Agreement dated as of January 29, 1998 (the "Prior
Registration Rights Agreement");

                  WHEREAS, the Company is entering into a Share Purchase
Agreement, an Agreement and Plan of Merger and a Registration Rights Agreement
on the date hereof with Developers Diversified Realty Corporation ("DDR"); and

                  WHEREAS, to enable the Company to enter into such agreements
with DDR, the Investor has agreed to amend the registration rights previously
granted to the Investor by the Company;

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

         1.       Definitions.

                  As used in this Agreement, the following capitalized terms
shall have the following meanings:

                  Closing Date: The closing date as defined in the Purchase 
Agreement.

                  Common Shares: The common shares of beneficial interest, $0.10
par value per share, of the Company.

                  Exchange Act: The Securities Exchange Act of 1934, as amended
from time to time.



<PAGE>   2
                  Person: An individual, partnership, corporation, limited
liability company, trust or unincorporated organization, or a government or
agency or political subdivision thereof.

                  Prospectus: The prospectus included in any Registration
Statement, as amended or supplemented by any prospectus supplement with respect
to the terms of the offering of any portion of the Registrable Securities
covered by such Registration Statement and by all other amendments and
supplements to the prospectus, including post-effective amendments and all
material incorporated by reference in such prospectus.

                  Purchase Agreement: As defined in the Recitals to this
Agreement.

                  Purchasers: See Section 2(b) hereof.

                  Registrable Securities: (a) The Shares and (b) any securities
issued or issuable with respect to the Shares by way of share dividend or share
split or in connection with a combination of shares, recapitalization, merger,
consolidation or other reorganization or otherwise. Any Registrable Security
will cease to be a Registrable Security when (i) a registration statement
covering such Registrable Security has been declared effective by the SEC and
the Registrable Security has been disposed of pursuant to such effective
registration statement, (ii) the Registrable Security is sold under
circumstances in which all of the applicable conditions of Rule l44 (or any
similar provisions then in force) under the Securities Act are met, or (iii) the
Registrable Security has been otherwise transferred, the Company has delivered a
new certificate or other evidence of ownership for it not bearing a legend
restricting further transfer, and it may be resold without subsequent
registration under the Securities Act.

                  Registration Expenses: See Section 5 hereof.

                  Registration Statement: The Registration Statement of the
Company that covers any of the Registrable Securities pursuant to the provisions
of this Agreement, including the Prospectus included therein, all amendments and
supplements to such Registration Statement, including post-effective amendments,
all exhibits and all material incorporated by reference in such Registration
Statement.

                  SEC: The Securities and Exchange Commission or any successor
entity.

                  Securities Act: The Securities Act of 1933, as amended from
time to time.

                  Shares: As defined in the Recitals to this Agreement.

                  Shelf Registration: See Section 2(a) hereof.

                  Underwritten Registration or Underwritten Offering: A
registration in which securities of the Company are sold to an underwriter for
reoffering to the public.


                                        2

<PAGE>   3
         2.       Registration Rights.

                  (a) Shelf Registration. Upon the written request of the
Investor, the Company will file a "shelf" registration statement on any
appropriate form pursuant to Rule 415 (or similar rule that may be adopted by
the SEC) under the Securities Act (a "SHELF REGISTRATION"), which Shelf
Registration will cover the Registrable Securities that the Company has been so
requested to register by the Investor.

                  The Company hereby agrees to file such registration statement
as promptly as practicable following the request therefor, and in any event
within 60 days following the date such request is received by the Company, and
thereafter to use its commercially reasonable efforts to cause such Shelf
Registration to become effective and thereafter to keep it continuously
effective, and to prevent the happening of any event of the kind described in
Section 4(c)(3), (4), (5) or (6) hereof that requires the Company to give notice
pursuant to the last paragraph of Section 4 hereof, for a period terminating on
the third year anniversary of the date on which the SEC declares the Shelf
Registration effective, or such shorter period as shall terminate on the date on
which all the Registrable Securities covered by the Shelf Registration have been
sold pursuant to such Shelf Registration. The Company shall be obligated to file
only one Shelf Registration and shall not be obligated to file a Shelf
Registration if three Demand Registrations (hereinafter defined) have been
effected under Section 2(b).

         The Company further agrees to promptly supplement or make amendments to
the Shelf Registration, if required by the rules, regulations or instructions
applicable to the registration form utilized by the Company or by the Securities
Act or rules and regulations thereunder for shelf registration or if requested
by the Investor.

         If the Investor so elects, the offering of Registrable Securities
pursuant to such registration shall be in the form of an Underwritten Offering.

                  (b) Demand Registration. At any time during the five year
period following the Closing Date, the Investor may make a written request (the
"DEMAND NOTICE") for registration under the Securities Act (a "DEMAND
REGISTRATION") of its Registrable Securities. The Demand Notice will specify the
number of shares of Registrable Securities proposed to be sold and will also
specify the intended method of disposition thereof. Following receipt of a
Demand Notice from the Investor, the Company promptly will file a registration
statement on any appropriate form which will cover the Registrable Securities
that the Company has been so requested to register by the Investor.

         Unless the Investor shall consent in writing, no party (including the
Company) other than DDR, USAA Real Estate Company ("Realco"), MS Real Estate
Special Situations Inc. ("MRSE"), certain clients of Morgan Stanley Asset
Management Inc. who have purchased Common Shares of the Company (such clients
together with MRSE, the "Morgan Entities"), LaSalle Advisors Limited Partnership
acting as agent for and on behalf of certain clients ("LaSalle"), or
ABKB/LaSalle Securities Limited Partnership ("ABKB" and together with LaSalle,
the "LaSalle Entities") shall be


                                        3

<PAGE>   4
permitted to offer securities under any such Demand Registration. The Company
shall not be required to effect more than three Demand Registrations under this
Section 2(b). A registration requested pursuant to this Section 2(b) will not be
deemed to have been effected (and it shall not count as one of the three Demand
Registrations) unless the Registration Statement relating thereto has become
effective under the Securities Act; provided, however that if, after such
Registration Statement has become effective, the offering of the Registrable
Securities pursuant to such registration is interfered with by any stop order,
injunction or other order or requirement of the SEC or any other governmental
agency or court, such registration will be deemed not to have been effected (and
it shall not count as one of the three Demand Registrations). The Investor may
at any time prior to the effective date of the Registration Statement relating
to such registration revoke a Demand Notice by providing a written notice to the
Company (in which case such Demand Registration shall not count as one of the
three Demand Registrations).

         If the Investor so elects, the offering of Registrable Securities
pursuant to such registration shall be in the form of an Underwritten Offering.
If the managing underwriter or underwriters of such offering advise the Company
and the Investor in writing that in their opinion the number of shares of
Registrable Securities and shares of DDR, Realco, the Morgan Entities or the
LaSalle Entities, if any, requested to be included in such offering is
sufficiently large to materially and adversely affect the success of such
offering, the Company will include in such registration the aggregate number of
Registrable Securities and shares of DDR, Realco, the Morgan Entities or the
LaSalle Entities, if any, requested to be included, which in the opinion of such
managing underwriter or underwriters can be sold without any such material
adverse effect; provided, however, that no Registrable Securities or shares of
DDR, Realco, the Morgan Entities or the LaSalle Entities, if any, may be
excluded before all shares proposed to be sold by other parties, including the
Company, have been excluded. If any Registrable Securities are excluded, such
registration shall not count as one of the three Demand Registrations. If the
amount of Registrable Securities proposed to be registered hereunder are
required to be excluded pursuant to this paragraph, the number of Registrable
Securities of the Investor and the number of shares of DDR, Realco, the Morgan
Entities or the LaSalle Entities, if any, to be included in such Registration
shall be reduced pro rata (according to the total number of Registrable
Securities or shares, as the case may be, beneficially owned by each such
holder), to the extent necessary to reduce the total amount necessary to be
included in the Offering to the amount recommended by such managing underwriter
or underwriters.

         No registration pursuant to a request or requests referred to in this
subsection 2(b) shall be deemed to be a Shelf Registration.

                  (c) Incidental Registration. If at any time during the five
year period following the Closing Date, the Company proposes to file a
registration statement under the Securities Act (other than in connection with a
Registration Statement on Form S-4 or S-8, or any form that is substituting
therefor or is a successor thereto) with respect to an offering of any class of
security by the Company for its own account or for the account of any of its
security holders, then the Company shall give written notice of such proposed
filing to the Investor as soon as practicable (but in no event less than 30 days
before the anticipated filing date), and such notice shall (i) offer the
Investor


                                        4

<PAGE>   5
the opportunity to register such number of Registrable Securities as it may
request and (ii) describe such securities and specify the form and manner and
other relevant facts involved in such proposed registration (including, without
limitation, (x) whether or not such registration will be in connection with an
Underwritten Offering and, if so, the identity of the managing underwriter and
whether such Underwritten Offering will be pursuant to a "best efforts" or "firm
commitment" underwriting and (y) the price (net of any underwriting commissions,
discounts and the like) at which the Registrable Securities are reasonably
expected to be sold, if such disclosure is acceptable to the managing
underwriter). The Investor shall advise the Company in writing within 20 days
after the date of receipt of such notice from the Company of the number of
Registrable Securities for which registration is requested. The Company shall
include in such Registration Statement all such Registrable Securities so
requested to be included therein, and, if such registration is an Underwritten
Registration, the Company shall use its commercially reasonable efforts to cause
the managing underwriter or underwriters to permit the Registrable Securities
requested to be included in the registration statement for such offering to be
included (on the same terms and conditions as similar securities of the Company
included therein to the extent appropriate); provided, however, that if the
managing underwriter or underwriters of such offering deliver a written opinion
to the Investor that either because of (i) the kind of securities which the
Investor, the Company, or any other Persons intend to include in such offering
or (ii) the size of the offering which the Investor, the Company, or such other
Persons intend to make, the success of the offering would be materially and
adversely affected by inclusion of the Registrable Securities requested to be
included, then (A) in the event that the size of the offering is the basis of
such managing underwriter's opinion, the amount of securities to be offered for
the account of the Investor and other holders registering securities of the
Company pursuant to similar incidental registration rights shall be reduced pro
rata (according to the Registrable Securities beneficially owned by each such
holder) to the extent necessary to reduce the total amount of securities to be
included in such offering to the amount recommended by such managing underwriter
or underwriters; and (B) in the event that the combination of securities to be
offered is the basis of such managing underwriter's opinion, (x) the Registrable
Securities and other securities to be included in such offering shall be reduced
as described in clause (A) above or, (y) if the actions described in clause (A)
would, in the judgment of the managing underwriter and pursuant to a written
opinion delivered to the Investor, be insufficient to substantially eliminate
the adverse effect that inclusion of the Registrable Securities requested to be
included would have on such offering, such Registrable Securities will be
excluded from such offering. Notwithstanding the foregoing, if the Investor
exercises an incidental registration in connection with DDR's or Realco's or the
Morgan Entities' or LaSalle Entities' demand registration rights, then the
managing underwriter's cutback provision under the demand registration right set
forth in Section 2(b) shall govern with respect to the Investor and not the
managing underwriter's cutback provision in this Section 2(c).

         No registration pursuant to a request or requests referred to in this
subsection 2(c) shall be deemed to be a Shelf Registration.


                                        5

<PAGE>   6
         3.       Hold-Back Agreements.

                  (a) Restrictions on Public Sale by Holder of Registrable
Securities. The Investor agrees, if reasonably requested by the managing
underwriters in an Underwritten Offering, not to effect any public sale or
distribution of securities of the Company of the same class as the securities
included in the Registration Statement relating to such Underwritten Offering,
including a sale pursuant to Rule 144 under the Securities Act (except as part
of such Underwritten Offering), during the 10-day period prior to the filing of
such Registration Statement, and during the 90-day period beginning on the
closing date of each Underwritten Offering made pursuant to such Registration
Statement, to the extent timely notified in writing by the Company or the
managing underwriters.

                  (b) Restrictions on Sale of Securities by the Company. The
Company agrees not to effect any public sale or distribution of any securities
similar to those being registered, or any securities convertible into or
exchangeable or exercisable for such securities (except pursuant to a
registration statement on Form S-4 or S-8, or any substitute form that may be
adopted by the SEC) during the ten days prior to the filing of a registration
statement with respect to an Underwritten Offering, and during the 90-day period
beginning on the effective date of such Registration Statement (except as part
of such registration statement (x) where the Investor participating in such
registration statement consents, (y) where the Investor is participating in such
registration statement pursuant to Section 2(c) hereof, such registration
statement was filed by the Company with respect to the sale of securities by the
Company, and the Investor is not simultaneously participating in a registration
statement pursuant to Section 2(b) hereof), or (z) with respect to DDR, Realco,
the Morgan Entities or the LaSalle Entities, if such parties are participating
in a Demand Registration pursuant to Section 2(b) hereof), or the commencement
of a public distribution of Registrable Securities pursuant to such registration
statement.

         4.       Registration Procedures. In connection with the Company's
registration obligations pursuant to Section 2 hereof, the Company will use its
commercially reasonable efforts to effect such registration to permit the sale
of such Registrable Securities in accordance with the intended method or methods
of distribution thereof, and pursuant thereto the Company will use commercially
reasonable efforts to as expeditiously as possible:

                  (a) prepare and file with the SEC, as soon as practicable, and
in any event within 60 days from the date of request, a Registration Statement
relating to the applicable registration on any appropriate form under the
Securities Act, which forms shall be available for the sale of the Registrable
Securities in accordance with the intended method or methods of distribution
thereof and shall include all financial statements of the Company, and use its
commercially reasonable efforts to cause such Registration Statement to become
effective; provided that before filing a Registration Statement or Prospectus or
any amendments or supplements thereto, including documents incorporated by
reference after the initial filing of the Registration Statement, the Company
will furnish the Investor and the underwriters, if any, copies of all such
documents proposed to be filed, which documents will be subject to the review of
the Investor and the underwriters, if any, and the Company will not file any
Registration Statement or amendment thereto or any Prospectus or any supplement
thereto (including such documents incorporated by reference) to which the
Investor or


                                        6

<PAGE>   7
the underwriters, if any, shall reasonably object (except in the case of a
filing pursuant to Section 2(c) hereof);

                  (b) prepare and file with the SEC such amendments and
post-effective amendments to the Registration Statement as may be necessary to
keep the Registration Statement effective for the applicable period, or such
shorter period, which will terminate when all Registrable Securities included in
such Registration Statement have been sold; cause the Prospectus to be
supplemented by any required Prospectus supplement, and as so supplemented to be
filed pursuant to Rule 424 under the Securities Act; and comply with the
provisions of all securities included in such Registration Statement during the
applicable period in accordance with the intended method or methods of
distribution by the sellers thereof set forth in such Registration Statement or
supplement to the Prospectus; the Company shall not be deemed to have used
commercially reasonable efforts to keep a Registration Statement effective
during the applicable period if it voluntarily takes any action that would
result in the Investor not being able to sell its Registrable Securities during
that period unless such action is required under applicable law; provided that
the foregoing shall not apply to actions taken by the Company in good faith and
for valid business reasons, including without limitation the acquisition or
divestiture of assets, so long as the Company promptly thereafter complies with
the requirements of Section 4(k) hereof, if applicable;

                  (c) notify the Investor and the managing underwriters, if any,
promptly (and in no event more than three days after the occurrence of any of
the following events), and (if requested by any such Person) confirm such advice
in writing, (l) when the Prospectus or any Prospectus supplement or
post-effective amendment has been filed, and, with respect to the Registration
Statement or any post-effective amendment, when the same has become effective,
(2) of any request by the SEC for amendments or supplements to the Registration
Statement or the Prospectus or for additional information, (3) of the issuance
by the SEC of any stop order suspending the effectiveness of the Registration
Statement or the initiation of any proceedings for that purpose, (4) if at any
time the representations and warranties of the Company contemplated by paragraph
(m) below cease to be true and correct, (5) of the receipt by the Company of any
notification with respect to the suspension of the qualification of the
Registrable Securities for sale in any jurisdiction or the initiation or
threatening of any proceeding for such purpose and (6) of the happening of any
event which makes any statement made in the Registration Statement, the
Prospectus or any document incorporated therein by reference untrue or which
requires the making of any changes in the Registration Statement, the Prospectus
or any document incorporated therein by reference in order to make the
statements therein not misleading;

                  (d) obtain the withdrawal of any order suspending the
effectiveness of the Registration Statement at the earliest possible moment;

                  (e) if reasonably requested by the managing underwriter or
underwriters or by the Investor, promptly incorporate in a Prospectus supplement
or post-effective amendment such information as the managing underwriters and
the Investor agree should be included therein relating to the sale of the
Registrable Securities, including, without limitation, information with respect
to


                                        7

<PAGE>   8
the number of Registrable Securities being sold to such underwriters, the
purchase price being paid therefor by such underwriters and with respect to any
other terms of the Underwritten (or best efforts underwritten) Offering of the
Registrable Securities to be sold in such offering; and make all required
filings of such Prospectus supplement or post-effective amendment as soon as
notified of the matters to be incorporated in such Prospectus supplement or
post-effective amendment;

                  (f) furnish to the Investor and each managing underwriter, if
any, without charge, at least one signed copy of the Registration Statement and
any post-effective amendment thereto, including financial statements and
schedules, all documents incorporated therein by reference and all exhibits
(including those incorporated by reference);

                  (g) deliver to the Investor and the underwriters, if any,
without charge, as many copies of the Prospectus (including each preliminary
prospectus) and any amendment or supplement thereto as such Persons may
reasonably request; the Company consents to the use of the Prospectus or any
amendment or supplement thereto by the Investor and the underwriters, if any, in
connection with the offering and sale of the Registrable Securities covered by
the Prospectus or any amendment or supplement thereto;

                  (h) prior to any public offering of Registrable Securities,
register or qualify or cooperate with the Investor, the underwriters, if any,
and their respective counsel in connection with the registration or
qualification of such Registrable Securities for offer and sale under the
securities or blue sky laws of such jurisdictions as the Investor or any
underwriter reasonably requests in writing and do any and all other acts or
things necessary or advisable to enable the disposition in such jurisdictions of
the Registrable Securities covered by the Registration Statement;

                  (i) cooperate with the Investor and the managing underwriters,
if any, to facilitate the timely preparation and delivery of certificates
representing Registrable Securities to be sold and not bearing any restrictive
legends (except as reasonably required to protect the Company's status as a
REIT); and enable such Registrable Securities to be in such denominations and
registered in such names as the managing underwriters may request at least two
business days prior to any sale of Registrable Securities to the underwriters;

                  (j) cause the Registrable Securities covered by the applicable
Registration Statement to be registered with or approved by such other
governmental agencies or authorities as may be necessary to enable the Investor
or the underwriters, if any, to consummate the disposition of such Registrable
Securities;

                  (k) upon the occurrence of any event contemplated by Section
4(c)(6) above, prepare a supplement or post-effective amendment to the
Registration Statement or the related Prospectus or any document incorporated
therein by reference or file any other required document so that, as thereafter
delivered to the purchasers of the Registrable Securities, the Prospectus will
not contain an untrue statement of a material fact or omit to state any material
fact necessary to make the statements therein not misleading;


                                        8

<PAGE>   9
                  (l) cause all Registrable Securities covered by the
Registration Statement to be listed on each securities exchange on which similar
securities issued by the Company are then listed;

                  (m) enter into such agreements (including an underwriting
agreement) and take all such other actions in connection therewith in order to
expedite or facilitate the disposition of such Registrable Securities and in
connection therewith, whether or not an underwriting agreement is entered into
and whether or not the registration is an Underwritten Registration, (1) make
such representations and warranties to the Investor and the underwriters, if
any, in form, substance and scope as are customarily made by issuers to
underwriters in primary underwritten offerings; (2) obtain opinions of counsel
to the Company and updates thereof (which counsel and opinions (in form, scope
and substance) shall be reasonably satisfactory to the Investor and the managing
underwriters, if any, covering the matters customarily covered in opinions
requested in Underwritten Offerings and such other matters as may be reasonably
requested by the Investor and the underwriters, if any; (3) obtain "cold
comfort" letters and updates thereof from the Company's independent certified
public accountants addressed to the Investor and the underwriters, if any, such
letters to be in customary form and covering matters of the type customarily
covered in "cold comfort" letters by underwriters in connection with primary
Underwritten Offerings; (4) if an underwriting agreement is entered into, the
same shall set forth in full the indemnification provisions and procedures of
Section 6 hereof with respect to all parties to be indemnified pursuant to said
Section; and (5) deliver such documents and certificates as may be reasonably
requested by the Investor and the managing underwriters, if any, to evidence
compliance with clause (1) above and with any customary conditions contained in
the underwriting agreement or other agreement entered into by the Company. The
above shall be done at each closing under such underwriting or similar agreement
or as and to the extent required thereunder;

                  (n) make available for inspection by a representative of the
Investor, any underwriter participating in any disposition pursuant to such
registration, and any attorney or accountant retained by the Investor or any
underwriter, all financial and other records, pertinent corporate documents and
properties of the Company and cause the Company's officers, trust managers and
employees to supply all information reasonably requested by any such
representative, underwriter, attorney or accountant in connection with such
registration; provided that any records, information or documents that the
Company designates in writing as confidential shall be kept confidential by such
Persons unless disclosure of such records, information or documents is required
by court or administrative order;

                  (o) otherwise use its commercially reasonable efforts to
comply with all applicable rules and regulations of the SEC, and make available
to its security holders, as soon as reasonably practicable, an earnings
statement covering a period of 12 months, beginning within three months after
the effective date of the registration statement, which earnings statement shall
satisfy the provisions of section 11(a) of the Securities Act; and


                                        9

<PAGE>   10
                  (p) cooperate with the Investor and each underwriter
participating in the disposition of such Registrable Securities and their
respective counsel in connection with any filings required to be made with the
National Association of Securities Dealers, Inc. (the "NASD").

         The Company may require the Investor to furnish to the Company such
information regarding the distribution of Registrable Securities as the Company
may from time to time reasonably request in writing.

         The Investor agrees by acquisition of the Registrable Securities that,
upon receipt of any notice from the Company of the happening of any event of the
kind described in Section 4(k) hereof, the Investor will forthwith discontinue
disposition of Registrable Securities until the Investor's receipt of the copies
of the supplemented or amended Prospectus contemplated by Section 4(k) hereof,
or until it is advised in writing (the "ADVICE") by the Company that the use of
the Prospectus may be resumed, and has received copies of any additional or
supplemental filings which are incorporated by reference in the Prospectus, and,
if so directed by the Company, the Investor will deliver to the Company (at the
Company's expense), all copies, other than permanent file copies then in the
Investor's possession, of the Prospectus covering such Registrable Securities
current at the time of receipt of such notice. In the event the Company shall
give any such notice, the time periods regarding the effectiveness of
Registration Statements set forth in Section 2 hereof and Section 4(b) hereof
shall be extended by the number of days during the period from and including the
date of the giving of such notice pursuant to Section 4(c)(6) hereof to the date
when the Investor shall receive copies of the supplemented or amended prospectus
contemplated by Section 4(k) hereof or the Advice.

         5.       Registration Expenses. All expenses incident to the
Company's performance of or compliance with this Agreement, including without
limitation: all registration and filing fees; fees with respect to filings
required to be made with the NASD; fees and expenses of compliance with
securities or blue sky laws (including reasonable fees and disbursements of
counsel for the underwriters or the Investor in connection with blue sky
qualifications of the Registrable Securities and determination of their
eligibility for investment under the laws of such jurisdictions as the managing
underwriters and the Investor may designate); printing expenses, messenger,
telephone and delivery expenses; fees and disbursements of counsel for the
Company and fees and expenses for independent certified public accountants
retained by the Company (including the expenses of any comfort letters or costs
associated with the delivery by independent certified public accountants of a
comfort letter or comfort letters requested pursuant to Section 4(m) hereof);
securities acts liability insurance, if the Company so desires; all internal
expenses of the Company (including, without limitation, all salaries and
expenses of its officers and employees performing legal or accounting duties);
the expense of any annual audit; the fees and expenses incurred in connection
with the listing of the securities to be registered on each securities exchange
on which similar securities issued by the Company are then listed; and the fees
and expenses of any Person, including special experts, retained by the Company
(all such expenses being herein called "REGISTRATION EXPENSES") will be borne by
the Company regardless of whether the Registration Statement becomes effective.
The Company shall not have any obligation to pay any underwriting fees,
discounts or commissions


                                       10

<PAGE>   11



attributable to the sale of Registrable Securities, or any legal fees and
expenses of counsel to the Investor, except as expressly provided herein.

         6.       Indemnification: Contribution.

                  (a) Indemnification by Company. The Company agrees to
indemnify and hold harmless the Investor and its partners, officers, directors,
employees and agents, and each Person who controls any such Persons (within the
meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act)
against all losses, claims, damages, liabilities and reasonable expenses arising
out of or based upon any untrue or alleged untrue statement of a material fact
contained in any Registration Statement, Prospectus or preliminary 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 not misleading,
except insofar as the same are caused by or contained in any information
furnished in writing to the Company by the Investor expressly for use therein.
The Company will also indemnify underwriters, selling brokers, dealer managers
and similar securities industry professionals participating in the distribution,
their officers and trust managers and each Person who controls such Persons
(within the meaning of Section 15 of the Securities Act or Section 20 of the
Exchange Act) to the same extent as provided above with respect to the
indemnification of the Investor, if requested.

                  (b) Indemnification By Holder of Registrable Securities. The
Investor agrees to indemnify and hold harmless the Company and its trust
managers, officers, employees and agents, and each Person who controls the
Company (within the meaning of Section 15 of the Securities Act or Section 20 of
the Exchange Act) against any losses, claims, damages, liabilities and
reasonable expenses resulting from any untrue statement of a material fact or
any omission of a material fact required to be stated in the Registration
Statement or Prospectus or preliminary prospectus or necessary to make the
statements therein not misleading, to the extent, but only to the extent, that
such untrue statement or omission is contained in any information or affidavit
so furnished in writing by the Investor to the Company specifically for
inclusion in such Registration Statement or Prospectus. In no event shall the
liability of the Investor hereunder be greater in amount than the dollar amount
of the proceeds received by such Person upon the sale of the Registrable
Securities giving rise to such indemnification obligation. The Company shall be
entitled to receive indemnities from underwriters, selling brokers, dealer
managers and similar securities industry professionals participating in the
distribution, to the same extent as provided above with respect to information
so furnished in writing by such Persons specifically for inclusion in any
Prospectus or Registration Statement.

                  (c) Conduct of Indemnification Proceedings. Any Person
entitled to indemnification hereunder will (i) give prompt notice (and in any
event within 10 days) to the indemnifying party of any claim with respect to
which it seeks indemnification and (ii) permit such indemnifying party to assume
the defense of such claim with counsel reasonably satisfactory to the
indemnified party; provided, however that any Person entitled to indemnification
hereunder shall have the right to employ separate counsel and to participate in
the defense of such claim, but the fees


                                       11

<PAGE>   12



and expenses of such counsel shall be at the expense of such Person unless (a)
the indemnifying party has agreed to pay such fees or expenses, (b) the
indemnifying party shall have failed to assume the defense of such claim and
employ counsel reasonably satisfactory to such Person or (c) based upon written
advice of counsel to such Person, there shall be one or more defenses available
to such Person that are not available to the indemnifying party or there shall
exist conflicts of interest pursuant to applicable rules of professional conduct
between such Person and the indemnifying party (in which case, if the Person
notifies the indemnifying party in writing that such Person elects to employ
separate counsel at the expense of the indemnifying party, the indemnifying
party shall not have the right to assume the defense of such claim on behalf of
such Person), in each of which events the fees and expenses of such counsel
shall be at the expense of the indemnifying party. The indemnifying party will
not be subject to any liability for any settlement made without its consent (but
such consent will not be unreasonably withheld), but if settled with its written
consent, or if there be a final judgment for the plaintiff in any such action or
proceeding, the indemnifying party shall indemnify and hold harmless the
indemnified parties from and against any loss or liability (to the extent stated
above) by reason of such settlement or judgment. No indemnified party will be
required to consent to entry of any judgment or enter into any settlement which
does not include as an unconditional term thereof the giving by the claimant or
plaintiff to such indemnified party of a release from all liability in respect
to such claim or litigation.

                  (d) Contribution. If for any reason the indemnification
provided for in the preceding clauses (a) and (b) is unavailable to an
indemnified party or insufficient to hold it harmless as contemplated by the
preceding clauses (a) and (b), then the indemnifying party shall contribute to
the amount paid or payable by the indemnified party as a result of such loss,
claim, damage or liability in such proportion as is appropriate to reflect not
only the relative benefits received by the indemnified party and the
indemnifying party, but also the relative fault of the indemnified party and the
indemnifying party, as well as any other relevant equitable considerations,
provided, that in no event shall the Investor be required to contribute an
amount greater than the dollar amount of the proceeds received by Investor with
respect to the sale of the Registrable Securities giving rise to such
indemnification obligation. The relative fault of the Company on the one hand
and of the Investor on the other shall be determined by reference to, among
other things, whether the untrue or alleged untrue statement of a material fact
or the omission or alleged omission to state a material fact relates to
information supplied by such party, and the parties' relative intent, knowledge,
access to information, and opportunity to correct or prevent such statement or
omission. No Person guilty of fraudulent misrepresentation (within the meaning
of Section 10(f) of the Securities Act) shall be entitled to contribution from
any Person who was not guilty of such fraudulent misrepresentation.

         7. Rule 144. The Company hereby agrees that it will file the reports
required to be filed by it under the Securities Act and the Exchange Act and the
rules and regulations adopted by the SEC thereunder (or, if the Company is not
required to file such reports, it will, upon the request of the Investor, make
publicly available other information so long as necessary to permit sales
pursuant to Rule 144 under the Securities Act), and it will take such further
action as the Investor may reasonably request, all to the extent required from
time to time to enable the Investor to sell Registrable Securities without
registration under the Securities Act within the limitation of the


                                       12

<PAGE>   13
exemptions provided by (a) Rule 144 under the Securities Act, as such Rule may
be amended from time to time, or (b) any similar rule or regulation hereafter
adopted by the SEC. Upon the request of the Investor, the Company will deliver
to the Investor a written statement as to whether it has complied with such
information and requirements.

         8.       Participation in Underwritten Registrations.

                  (a) If any of the Registrable Securities covered by the Shelf
Registration are to be sold in an Underwritten Offering (excluding under Section
2(c)), the investment banker or investment bankers and manager or managers that
will administer the offering will be selected by the Investor; provided that
such investment bankers and managers must be reasonably satisfactory to the
Company.

                  (b) No Person may participate in any Underwritten Registration
hereunder unless such Person (i) agrees to sell such Person's securities on the
basis provided in any underwriting arrangements approved by the Persons entitled
hereunder to approve such arrangements and (ii) completes and executes all
questionnaires, powers of attorney, indemnities, underwriting agreements and
other documents required under the terms of such underwriting arrangements.
Nothing in this Section 8 shall be construed to create any additional rights
regarding the registration of Registrable Securities in any Person otherwise
than as set forth herein.

         9.       Miscellaneous.

                  (a) Remedies. Each party hereto, in addition to being entitled
to exercise all rights provided herein or granted by law, including recovery of
damages, will be entitled to specific performance of its rights under this
Agreement to the extent available under applicable law. Each party hereto agrees
that monetary damages would not be adequate compensation for any loss incurred
by reason of a breach by it of the provisions of this Agreement and hereby
agrees to waive the defense in any action for specific performance that a remedy
at law would be adequate.

                  (b) Third Party Registration Rights. The Company will not on
or after the date of this Agreement, enter into any agreement granting
registration rights to any other Person with respect to the securities of the
Company that are not junior or subordinate to the rights granted to the Investor
hereunder without the written consent of the Investor. The Company hereby
represents and warrants to the Investor that it has obtained all necessary
consents or waivers of Realco, the Morgan Entities and the LaSalle Entities in
connection with the execution of this Agreement and the consummation of the
transactions contemplated hereby.

                  (c) Amendments and Waivers. The provisions of this Agreement,
including the provisions of this sentence, may not be amended, modified or
supplemented, and waivers or consents to departures from the provisions hereof
may not be given without the written consent of the Company and Investor.


                                       13

<PAGE>   14
                  (d) Notices. The notice provisions contained in Section 9.11
of the Purchase Agreements shall be incorporated herein and shall be governing
under this Agreement.

                  (e) Successors and Assigns. This Agreement shall inure to the
benefit of and be binding upon the successors and assigns of each of the
parties, including without limitation and without the need for an express
assignment, subsequent holders of Registrable Securities, provided further, that
the Company cannot assign its rights hereunder except pursuant to a merger.

                  (f) 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.

                  (g) Headings. The headings in this Agreement are for
convenience of reference only and shall not limit or otherwise affect the
meaning hereof.

                  (h) Governing Law. THIS AGREEMENT, AND THE RIGHTS AND
OBLIGATIONS OF THE PARTIES HERETO, SHALL BE GOVERNED BY AND CONSTRUED AND
ENFORCED IN ACCORDANCE WITH THE INTERNAL SUBSTANTIVE LAWS OF THE STATE OF TEXAS,
WITHOUT REGARD TO ITS PRINCIPLES OF CONFLICTS OF LAWS.

                  (i) Severability. If any provision of this Agreement is held
to be illegal, invalid or unenforceable under any current or future law, and if
the rights or obligations of the parties under this Agreement would not be
materially and adversely affected thereby, such provision shall be fully
separable, and this Agreement shall be construed and enforced as if such
illegal, invalid or unenforceable provision had never comprised a part thereof,
and the remaining provisions of this Agreement shall remain in full force and
effect and shall not be affected by the illegal, invalid or unenforceable
provision or by its severance therefrom. In lieu of such illegal, invalid or
unenforceable provision, there shall be added simultaneously as a part of this
Agreement, a legal, valid and enforceable provision as similar in terms to such
illegal, invalid or unenforceable provision as may be possible, and the parties
hereto request the court or any arbitrator to whom disputes relating to this
Agreement are submitted to reform the otherwise illegal, invalid or
unenforceable provision in accordance with this Section 9(i).

                  (j) Arbitration. In the event of a dispute hereunder which
cannot be resolved by the parties, such dispute shall be settled by arbitration
in accordance with the Commercial Arbitration Rules of the American Arbitration
Association and judgment on the award rendered by the arbitration panel may be
entered in any court or tribunal of competent jurisdiction. Any arbitration
occurring under this Section 9(j) shall be held in Dallas, Texas.

                  (k) Entire Agreement. This Agreement is intended by the
parties as a final expression of their agreement and intended to be a complete
and exclusive statement of the agreement and understanding of the parties hereto
in respect of the subject matter contained herein.


                                       14

<PAGE>   15
This Agreement supersedes all prior agreements and understandings between the
parties with respect to such subject matter.

                  (l) Attorneys' Fees. In any proceeding brought to enforce any
provision of this Agreement the successful party shall be entitled to recover
reasonable attorneys' and accountants' fees in addition to its costs and
expenses and any other available remedy.

                  (m) Representation of the Trust. The Trust hereby represents
and warrants to Investor that the rights granted to Investor hereunder are pari
passu to the registration rights granted by the Trust to each of the Morgan
Entities, the LaSalle Entities, USAA and DDR.

         IN WITNESS WHEREOF, the parties hereto have executed this First Amended
and Restated Registration Rights Agreement as of the date first written above.

                                 "COMPANY"

                                 AMERICAN INDUSTRIAL PROPERTIES REIT

                                 /s/ Charles W.  Wolcott
                                 -----------------------------------------------
                                 Charles W.  Wolcott
                                 President and Chief Executive Officer

                                 "INVESTOR"

                                 By: PRAEDIUM II INDUSTRIAL ASSOCIATES LLC,
                                     a Delaware limited liability company

                                     By: THE PRAEDIUM OPPORTUNITY FUND II, L.P.,
                                         its member

                                     By: PRAEDIUM ADVISORS, INC., its managing 
                                         general partner

                                         By: /s/  Christopher Hughes
                                             -----------------------------------
                                             Name: Christopher Hughes
                                                   -----------------------------
                                             Title: Vice President
                                                    ----------------------------

                                     By: PRAEDIUM PARTNERS, LLC, its investment
                                         general partner

                                         By: /s/ Christopher Hughes
                                             -----------------------------------
                                             Name: Christopher Hughes
                                                   -----------------------------
                                             Title: Vice President
                                                    ----------------------------


                                       15

<PAGE>   1
                                                                    EXHIBIT 10.7


            SECOND AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT

                  This Second Amended and Restated Registration Rights Agreement
(the "Agreement") is made and entered into as of July 30, 1998, by and among
American Industrial Properties REIT, a Texas real estate investment trust (the
"Company"), ABKB/LaSalle Securities Limited Partnership ("ABKB"), acting as
agent for and on behalf of a particular client and LaSalle Advisors Limited
Partnership ("LaSalle," and together with ABKB, the "Investor"), acting as agent
for and on behalf of certain of their respective clients(the "Pecuniary
Owners").

                                   WITNESSETH:

                  WHEREAS, pursuant to certain Common Share Purchase Agreements,
each dated as of July 3, 1997, among the Company and the Investor, as agent for
and on behalf of each of the Pecuniary Owners (collectively, the "Purchase
Agreement"), the Investor purchased 6,122,449 Common Shares (the "Shares") of
the Company as agent for and on behalf of the Pecuniary Owners;

                  WHEREAS, pursuant to the terms of the Purchase Agreement, the
Company and Investor agreed that the Company would grant certain registration
rights to the Investor with respect to the Shares;

                  WHEREAS, the Company and the Investor entered into
Registration Rights Agreements as of July 10, 1997 and January 29, 1998 (the
"Prior Registration Rights Agreement");

                  WHEREAS, the Company is entering into a Share Purchase
Agreement, an Agreement and Plan of Merger and a Registration Rights Agreement
on the date hereof with Developers Diversified Realty Corporation ("DDR"); and

                  WHEREAS, to enable the Company to enter into such agreements
with DDR, the Investor has agreed to amend the registration rights previously
granted to Investor by the Company;

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

         1.       Definitions.

                  As used in this Agreement, the following capitalized terms
shall have the following meanings:

                  Closing Date: The closing date as defined in the Purchase
Agreement.

                  Common Shares: The common shares of beneficial interest, $0.10
par value per share, of the Company.


                                        1

<PAGE>   2



                  Exchange Act: The Securities Exchange Act of 1934, as amended
from time to time.

                  Person: An individual, partnership, corporation, limited
liability company, trust or unincorporated organization, or a government or
agency or political subdivision thereof.

                  Preemptive Rights: As defined in the Purchase Agreement.

                  Prospectus: The prospectus included in any Registration
Statement, as amended or supplemented by any prospectus supplement with respect
to the terms of the offering of any portion of the Registrable Securities
covered by such Registration Statement and by all other amendments and
supplements to the prospectus, including post-effective amendments and all
material incorporated by reference in such prospectus.

                  Purchase Agreement: As defined in the Recitals to this
Agreement.

                  Purchasers: See Section 2(b) hereof.

                  Registrable Securities: (a) The Shares, (b) any securities
issued or issuable with respect to the Shares by way of share dividend or share
split or in connection with a combination of shares, recapitalization, merger,
consolidation or other reorganization or otherwise and (c) any additional Common
Shares of the Company purchased by the Investor (as agent for and on behalf of
the Pecuniary Owners or on behalf of any other client of the Investor that was
assigned Preemptive Rights under the Purchase Agreement) purchase to the
exercise of Preemptive Rights. Any Registrable Security will cease to be a
Registrable Security when (i) a registration statement covering such Registrable
Security has been declared effective by the SEC and the Registrable Security has
been disposed of pursuant to such effective registration statement, (ii) the
Registrable Security is sold under circumstances in which all of the applicable
conditions of Rule l44 (or any similar provisions then in force) under the
Securities Act are met, or (iii) the Registrable Security has been otherwise
transferred, the Company has delivered a new certificate or other evidence of
ownership for it not bearing a legend restricting further transfer, and it may
be resold without subsequent registration under the Securities Act.

                  Registration Expenses: See Section 5 hereof.

                  Registration Statement: The Registration Statement of the
Company that covers any of the Registrable Securities pursuant to the provisions
of this Agreement, including the Prospectus included therein, all amendments and
supplements to such Registration Statement, including post-effective amendments,
all exhibits and all material incorporated by reference in such Registration
Statement.

                  SEC: The Securities and Exchange Commission or any successor
entity.


                                        2

<PAGE>   3



                  Securities Act: The Securities Act of 1933, as amended from
time to time.

                  Shares: As defined in the Recitals to this Agreement.

                  Shelf Registration: See Section 2(a) hereof.

                  Underwritten Registration or Underwritten Offering: A
registration in which securities of the Company are sold to an underwriter for
reoffering to the public.

         2.       Registration Rights.

                  (a)    Shelf Registration. Upon the written request of the
Investor, holding, in the aggregate not less than (i) 25% of the aggregate
Registrable Securities outstanding, (ii) Registrable Securities having a fair
market value of at least $2 million whichever is less, that the Company effect
the registration under the Securities Act of such Registrable Securities
pursuant to a "shelf" registration statement, the Company will file such a
"shelf" registration statement on any appropriate form pursuant to Rule 415 (or
similar rule that may be adopted by the SEC) under the Securities Act (a "Shelf
Registration"), which Shelf Registration will cover (1) the Registrable
Securities that the Company has been so requested to register by the Investor,
and (2) all other Registrable Securities that the Company has been requested to
register by any other Pecuniary Owners by written request given to the Company
within 15 days after the Company's giving of written notice of the requesting
Investor's requested registration.

                  The Company hereby agrees to file such registration statement
as promptly as practicable following the request therefor, and in any event
within 60 days following the date such request is received by the Company, and
thereafter to use its commercially reasonable efforts to cause such Shelf
Registration to become effective and thereafter to keep it continuously
effective, and to prevent the happening of any event of the kind described in
Section 4(c)(3), (4), (5) or (6) hereof that requires the Company to give notice
pursuant to the last paragraph of Section 4 hereof, for a period terminating on
the third year anniversary of the date on which the SEC declares the Shelf
Registration effective, or such shorter period as shall terminate on the date on
which all the Registrable Securities covered by the Shelf Registration have been
sold pursuant to such Shelf Registration. The Company shall be obligated to file
only one Shelf Registration and shall not be obligated to file a Shelf
Registration if three Demand Registrations (hereinafter defined) have been
effected under Section 2(b).

         The Company further agrees to promptly supplement or make amendments to
the Shelf Registration, if required by the rules, regulations or instructions
applicable to the registration form utilized by the Company or by the Securities
Act or rules and regulations thereunder for shelf registration or if requested
by the Investor holding in the aggregate in excess of 50% of the Registrable
Securities covered by the Shelf Registration or any underwriter of the
Registrable Securities.


                                        3

<PAGE>   4



         If the Investor holding in the aggregate in excess of 50% of the
Registrable Securities covered by the Shelf Registration so elects, the offering
of Registrable Securities pursuant to such registration shall be in the form of
an Underwritten Offering.

                  (b)    Demand Registration. At any time during the five year
period following the Closing Date, the Investor holding in the aggregate not
less than (i) 25% of the aggregate Registrable Securities outstanding or (ii)
Registrable Securities having a fair market value of at least $2 million,
whichever is less, may make a written request (the "Demand Notice") for
registration under the Securities Act (a "Demand Registration") of its
Registrable Securities. The Demand Notice will specify the number of shares of
Registrable Securities proposed to be sold and will also specify the intended
method of disposition thereof. Following receipt of a Demand Notice from the
Investor, the Company promptly will file a registration statement on any
appropriate form which will cover the Registrable Securities that the Company
has been so requested to register by the Investor.

         Unless the Investor shall consent in writing, no party (including the
Company) other than a Pecuniary Owner, DDR, USAA Real Estate Company ("Realco"),
MS Real Estate Special Situations Inc. ("MRSE"), certain clients of Morgan
Stanley Asset Management Inc. who have purchased Common Shares of the Company
(such clients together with MRSE, the "Morgan Entities"), and Praedium II
Industrial Associates LLC ("Praedium") shall be permitted to offer securities
under any such Demand Registration. The Company shall not be required to effect
more than three Demand Registrations under this Section 2(b). A registration
requested pursuant to this Section 2(b) will not be deemed to have been effected
(and it shall not count as one of the three Demand Registrations) unless the
Registration Statement relating thereto has become effective under the
Securities Act; provided, however that if, after such Registration Statement has
become effective, the offering of the Registrable Securities pursuant to such
registration is interfered with by any stop order, injunction or other order or
requirement of the SEC or any other governmental agency or court, such
registration will be deemed not to have been effected (and it shall not count as
one of the three Demand Registrations). The Investor, holding in excess of 50%
of the Registrable Securities covered by a Demand Registration may at any time
prior to the effective date of the Registration Statement relating to such
registration revoke a Demand Notice by providing a written notice to the Company
(in which case such Demand Registration shall not count as one of the three
Demand Registrations).

         If the Investor holding in the aggregate in excess of 50% of the
Registrable Securities covered by the Demand Registration so elects, the
offering of Registrable Securities pursuant to such registration shall be in the
form of an Underwritten Offering. If the managing underwriter or underwriters of
such offering advise the Company and the Investor in writing that in their
opinion the number of shares of Registrable Securities and shares of DDR,
Realco, the Morgan Entities or Praedium, if any, requested to be included in
such offering is sufficiently large to materially and adversely affect the
success of such offering, the Company will include in such registration the
aggregate number of Registrable Securities and shares of DDR, Realco, the Morgan
Entities or Praedium, if any, requested to be included, which in the opinion of
such managing underwriter or underwriters can be sold without any such material
adverse effect; provided, however, that no

                                        4

<PAGE>   5



Registrable Securities or shares of DDR, Realco, the Morgan Entities or
Praedium, if any, may be excluded before all shares proposed to be sold by other
parties, including the Company, have been excluded. If any Registrable
Securities are excluded, such registration shall not count as one of the three
Demand Registrations. If the amount of Registrable Securities proposed to be
registered hereunder are required to be excluded pursuant to this paragraph, the
number of Registrable Securities of the Investor and the number of shares of
DDR, Realco, the Morgan Entities or Praedium, if any, to be included in such
Registration shall be reduced pro rata (according to the total number of
Registrable Securities or shares, as the case may be, beneficially owned by each
such holder), to the extent necessary to reduce the total amount necessary to be
included in the Offering to the amount recommended by such managing underwriter
or underwriters.

         No registration pursuant to a request or requests referred to in this
subsection 2(b) shall be deemed to be a Shelf Registration.

                  (c)    Incidental Registration. If at any time during the five
year period following the Closing Date, the Company proposes to file a
registration statement under the Securities Act (other than in connection with a
Registration Statement on Form S-4 or S-8, or any form that is substituting
therefor or is a successor thereto) with respect to an offering of any class of
security by the Company for its own account or for the account of any of its
security holders, then the Company shall give written notice of such proposed
filing to the Investor as soon as practicable (but in no event less than 30 days
before the anticipated filing date), and such notice shall (i) offer the
Investor the opportunity to register such number of Registrable Securities as it
may request and (ii) describe such securities and specify the form and manner
and other relevant facts involved in such proposed registration (including,
without limitation, (x) whether or not such registration will be in connection
with an Underwritten Offering and, if so, the identity of the managing
underwriter and whether such Underwritten Offering will be pursuant to a "best
efforts" or "firm commitment" underwriting and (y) the price (net of any
underwriting commissions, discounts and the like) at which the Registrable
Securities are reasonably expected to be sold, if such disclosure is acceptable
to the managing underwriter). The Investor shall advise the Company in writing
within 20 days after the date of receipt of such notice from the Company of the
number of Registrable Securities for which registration is requested. The
Company shall include in such Registration Statement all such Registrable
Securities so requested to be included therein, and, if such registration is an
Underwritten Registration, the Company shall use its commercially reasonable
efforts to cause the managing underwriter or underwriters to permit the
Registrable Securities requested to be included in the registration statement
for such offering to be included (on the same terms and conditions as similar
securities of the Company included therein to the extent appropriate); provided,
however, that if the managing underwriter or underwriters of such offering
deliver a written opinion to the Investor that either because of (i) the kind of
securities which the Investor, the Company, or any other Persons intend to
include in such offering or (ii) the size of the offering which the Investor,
the Company, or such other Persons intend to make, the success of the offering
would be materially and adversely affected by inclusion of the Registrable
Securities requested to be included, then (A) in the event that the size of the
offering is the basis of such managing underwriter's opinion, the amount of
securities to be offered for the account of the Investor and other holders
registering securities of the Company

                                        5

<PAGE>   6



pursuant to similar incidental registration rights shall be reduced pro rata
(according to the Registrable Securities beneficially owned by each such holder)
to the extent necessary to reduce the total amount of securities to be included
in such offering to the amount recommended by such managing underwriter or
underwriters; and (B) in the event that the combination of securities to be
offered is the basis of such managing underwriter's opinion, (x) the Registrable
Securities and other securities to be included in such offering shall be reduced
as described in clause (A) above or, (y) if the actions described in clause (A)
would, in the judgment of the managing underwriter and pursuant to a written
opinion delivered to the Investor, be insufficient to substantially eliminate
the adverse effect that inclusion of the Registrable Securities requested to be
included would have on such offering, such Registrable Securities will be
excluded from such offering. Notwithstanding the foregoing, if the Investor
exercises an incidental registration in connection with DDR's or Realco's or the
Morgan Entities' or Praedium's demand registration rights, then the managing
underwriter's cutback provision under the demand registration right set forth in
Section 2(b) shall govern with respect to the Investor and not the managing
underwriter's cutback provision in this Section 2(c).

         No registration pursuant to a request or requests referred to in this
subsection 2(c) shall be deemed to be a Shelf Registration.

         3.       Hold-Back Agreements.

                  (a)    Restrictions on Public Sale by Holder of Registrable
Securities. The Investor agrees, if reasonably requested by the managing
underwriters in an Underwritten Offering, not to effect any public sale or
distribution of securities of the Company of the same class as the securities
included in the Registration Statement relating to such Underwritten Offering,
including a sale pursuant to Rule 144 under the Securities Act (except as part
of such Underwritten Offering), during the 10-day period prior to the filing of
such Registration Statement, and during the 90-day period beginning on the
closing date of each Underwritten Offering made pursuant to such Registration
Statement, to the extent timely notified in writing by the Company or the
managing underwriters.

                  (b)    Restrictions on Sale of Securities by the Company. The
Company agrees not to effect any public sale or distribution of any securities
similar to those being registered, or any securities convertible into or
exchangeable or exercisable for such securities (except pursuant to a
registration statement on Form S-4 or S-8, or any substitute form that may be
adopted by the SEC) during the ten days prior to the filing of a registration
statement with respect to an Underwritten Offering, and during the 90-day period
beginning on the effective date of such Registration Statement (except as part
of such registration statement (x) where the Investor participating in such
registration statement consents, (y) where the Investor is participating in such
registration statement pursuant to Section 2(c) hereof, such registration
statement was filed by the Company with respect to the sale of securities by the
Company, and the Investor is not simultaneously participating in a registration
statement pursuant to Section 2(b) hereof), or (z) with respect to DDR, Realco,
the Morgan Entities or Praedium, if such parties are participating in a Demand
Registration pursuant to Section 2(b) hereof), or the commencement of a public
distribution of Registrable Securities pursuant to such registration statement.

                                        6

<PAGE>   7



         4.       Registration Procedures. In connection with the Company's
registration obligations pursuant to Section 2 hereof, the Company will use its
commercially reasonable efforts to effect such registration to permit the sale
of such Registrable Securities in accordance with the intended method or methods
of distribution thereof, and pursuant thereto the Company will use commercially
reasonable efforts to as expeditiously as possible:

                  (a)    prepare and file with the SEC, as soon as practicable,
and in any event within 60 days from the date of request, a Registration
Statement relating to the applicable registration on any appropriate form under
the Securities Act, which forms shall be available for the sale of the
Registrable Securities in accordance with the intended method or methods of
distribution thereof and shall include all financial statements of the Company,
and use its commercially reasonable efforts to cause such Registration Statement
to become effective; provided that before filing a Registration Statement or
Prospectus or any amendments or supplements thereto, including documents
incorporated by reference after the initial filing of the Registration
Statement, the Company will furnish the Investor and the underwriters, if any,
copies of all such documents proposed to be filed, which documents will be
subject to the review of the Investor and the underwriters, if any, and the
Company will not file any Registration Statement or amendment thereto or any
Prospectus or any supplement thereto (including such documents incorporated by
reference) to which the Investor holding in the aggregate in excess of 50% of
the Registrable Securities covered by such Registration Statement or the
underwriters, if any, shall reasonably object (except in the case of a filing
pursuant to Section 2(c) hereof);

                  (b)    prepare and file with the SEC such amendments and
post-effective amendments to the Registration Statement as may be necessary to
keep the Registration Statement effective for the applicable period, or such
shorter period, which will terminate when all Registrable Securities included in
such Registration Statement have been sold; cause the Prospectus to be
supplemented by any required Prospectus supplement, and as so supplemented to be
filed pursuant to Rule 424 under the Securities Act; and comply with the
provisions of all securities included in such Registration Statement during the
applicable period in accordance with the intended method or methods of
distribution by the sellers thereof set forth in such Registration Statement or
supplement to the Prospectus; the Company shall not be deemed to have used
commercially reasonable efforts to keep a Registration Statement effective
during the applicable period if it voluntarily takes any action that would
result in the Investor not being able to sell its Registrable Securities during
that period unless such action is required under applicable law; provided that
the foregoing shall not apply to actions taken by the Company in good faith and
for valid business reasons, including without limitation the acquisition or
divestiture of assets, so long as the Company promptly thereafter complies with
the requirements of Section 4(k) hereof, if applicable;

                  (c)    notify the Investor and the managing underwriters, if
any, promptly (and in no event more than three days after the occurrence of any
of the following events), and (if requested by any such Person) confirm such
advice in writing, (l) when the Prospectus or any Prospectus supplement or
post-effective amendment has been filed, and, with respect to the Registration
Statement or any post-effective amendment, when the same has become effective,
(2) of any request

                                        7

<PAGE>   8



by the SEC for amendments or supplements to the Registration Statement or the
Prospectus or for additional information, (3) of the issuance by the SEC of any
stop order suspending the effectiveness of the Registration Statement or the
initiation of any proceedings for that purpose, (4) if at any time the
representations and warranties of the Company contemplated by paragraph (m)
below cease to be true and correct, (5) of the receipt by the Company of any
notification with respect to the suspension of the qualification of the
Registrable Securities for sale in any jurisdiction or the initiation or
threatening of any proceeding for such purpose and (6) of the happening of any
event which makes any statement made in the Registration Statement, the
Prospectus or any document incorporated therein by reference untrue or which
requires the making of any changes in the Registration Statement, the Prospectus
or any document incorporated therein by reference in order to make the
statements therein not misleading;

                  (d)    obtain the withdrawal of any order suspending the
effectiveness of the Registration Statement at the earliest possible moment;

                  (e)    if reasonably requested by the managing underwriter or
underwriters or by the Investor holding in the aggregate in excess of 50% of the
Registrable Securities covered by the Registration Statement, promptly
incorporate in a Prospectus supplement or post-effective amendment such
information as the managing underwriters and the Investor agree should be
included therein relating to the sale of the Registrable Securities, including,
without limitation, information with respect to the number of Registrable
Securities being sold to such underwriters, the purchase price being paid
therefor by such underwriters and with respect to any other terms of the
Underwritten (or best efforts underwritten) Offering of the Registrable
Securities to be sold in such offering; and make all required filings of such
Prospectus supplement or post-effective amendment as soon as notified of the
matters to be incorporated in such Prospectus supplement or post-effective
amendment;

                  (f)    furnish to the Investor and each managing underwriter,
if any, without charge, at least one signed copy of the Registration Statement
and any post-effective amendment thereto, including financial statements and
schedules, all documents incorporated therein by reference and all exhibits
(including those incorporated by reference);

                  (g)    deliver to the Investor and the underwriters, if any,
without charge, as many copies of the Prospectus (including each preliminary
prospectus) and any amendment or supplement thereto as such Persons may
reasonably request; the Company consents to the use of the Prospectus or any
amendment or supplement thereto by the Investor and the underwriters, if any, in
connection with the offering and sale of the Registrable Securities covered by
the Prospectus or any amendment or supplement thereto;

                  (h)    prior to any public offering of Registrable Securities,
register or qualify or cooperate with the Investor, the underwriters, if any,
and their respective counsel in connection with the registration or
qualification of such Registrable Securities for offer and sale under the
securities or blue sky laws of such jurisdictions as the Investor or any
underwriter reasonably requests in

                                        8

<PAGE>   9



writing and do any and all other acts or things necessary or advisable to enable
the disposition in such jurisdictions of the Registrable Securities covered by
the Registration Statement;

                  (i)    cooperate with the Investor and the managing
underwriters, if any, to facilitate the timely preparation and delivery of
certificates representing Registrable Securities to be sold and not bearing any
restrictive legends (except as reasonably required to protect the Company's
status as a REIT); and enable such Registrable Securities to be in such
denominations and registered in such names as the managing underwriters may
request at least two business days prior to any sale of Registrable Securities
to the underwriters;

                  (j)    cause the Registrable Securities covered by the
applicable Registration Statement to be registered with or approved by such
other governmental agencies or authorities as may be necessary to enable the
Investor or the underwriters, if any, to consummate the disposition of such
Registrable Securities;

                  (k)    upon the occurrence of any event contemplated by
Section 4(c)(6) above, prepare a supplement or post-effective amendment to the
Registration Statement or the related Prospectus or any document incorporated
therein by reference or file any other required document so that, as thereafter
delivered to the purchasers of the Registrable Securities, the Prospectus will
not contain an untrue statement of a material fact or omit to state any material
fact necessary to make the statements therein not misleading;

                  (l)    cause all Registrable Securities covered by the
Registration Statement to be listed on each securities exchange on which similar
securities issued by the Company are then listed;

                  (m)    enter into such agreements (including an underwriting
agreement) and take all such other actions in connection therewith in order to
expedite or facilitate the disposition of such Registrable Securities and in
connection therewith, whether or not an underwriting agreement is entered into
and whether or not the registration is an Underwritten Registration, (1) make
such representations and warranties to the Investor and each Pecuniary Owner, as
applicable, and the underwriters, if any, in form, substance and scope as are
customarily made by issuers to underwriters in primary underwritten offerings;
(2) obtain opinions of counsel to the Company and updates thereof (which counsel
and opinions (in form, scope and substance) shall be reasonably satisfactory to
the Investor and the managing underwriters, if any, covering the matters
customarily covered in opinions requested in Underwritten Offerings and such
other matters as may be reasonably requested by the Investor and the
underwriters, if any; (3) obtain "cold comfort" letters and updates thereof from
the Company's independent certified public accountants addressed to the Investor
and the underwriters, if any, such letters to be in customary form and covering
matters of the type customarily covered in "cold comfort" letters by
underwriters in connection with primary Underwritten Offerings; (4) if an
underwriting agreement is entered into, the same shall set forth in full the
indemnification provisions and procedures of Section 6 hereof with respect to
all parties to be indemnified pursuant to said Section; and (5) deliver such
documents and certificates as may be reasonably requested by the Investor and
the managing underwriters, if any, to evidence compliance

                                        9

<PAGE>   10



with clause (1) above and with any customary conditions contained in the
underwriting agreement or other agreement entered into by the Company. The above
shall be done at each closing under such underwriting or similar agreement or as
and to the extent required thereunder;

                  (n)    make available for inspection by a representative of
the Investor, any underwriter participating in any disposition pursuant to such
registration, and any attorney or accountant retained by the Investor or any
underwriter, all financial and other records, pertinent corporate documents and
properties of the Company and cause the Company's officers, trust managers and
employees to supply all information reasonably requested by any such
representative, underwriter, attorney or accountant in connection with such
registration; provided that any records, information or documents that the
Company designates in writing as confidential shall be kept confidential by such
Persons unless disclosure of such records, information or documents is required
by court or administrative order;

                  (o)    otherwise use its commercially reasonable efforts to
comply with all applicable rules and regulations of the SEC, and make available
to its security holders, as soon as reasonably practicable, an earnings
statement covering a period of 12 months, beginning within three months after
the effective date of the registration statement, which earnings statement shall
satisfy the provisions of section 11(a) of the Securities Act; and

                  (p)    cooperate with the Investor and each underwriter
participating in the disposition of such Registrable Securities and their
respective counsel in connection with any filings required to be made with the
National Association of Securities Dealers, Inc. (the "NASD").

         The Company may require the Investor or each Pecuniary Owner, as
applicable, to furnish to the Company such information regarding the
distribution of Registrable Securities as the Company may from time to time
reasonably request in writing.

         The Investor agrees by acquisition of the Registrable Securities that,
upon receipt of any notice from the Company of the happening of any event of the
kind described in Section 4(k) hereof, the Investor will forthwith discontinue
disposition of Registrable Securities until the Investor's receipt of the copies
of the supplemented or amended Prospectus contemplated by Section 4(k) hereof,
or until it is advised in writing (the "Advice") by the Company that the use of
the Prospectus may be resumed, and has received copies of any additional or
supplemental filings which are incorporated by reference in the Prospectus, and,
if so directed by the Company, the Investor will deliver to the Company (at the
Company's expense), all copies, other than permanent file copies then in the
Investor's possession, of the Prospectus covering such Registrable Securities
current at the time of receipt of such notice. In the event the Company shall
give any such notice, the time periods regarding the effectiveness of
Registration Statements set forth in Section 2 hereof and Section 4(b) hereof
shall be extended by the number of days during the period from and including the
date of the giving of such notice pursuant to Section 4(c)(6) hereof to the date
when the Investor shall receive copies of the supplemented or amended prospectus
contemplated by Section 4(k) hereof or the Advice.

                                       10

<PAGE>   11



                  5.     Registration Expenses. All expenses incident to the
Company's performance of or compliance with this Agreement, including without
limitation: all registration and filing fees; fees with respect to filings
required to be made with the NASD; fees and expenses of compliance with
securities or blue sky laws (including reasonable fees and disbursements of
counsel for the underwriters or the Investor in connection with blue sky
qualifications of the Registrable Securities and determination of their
eligibility for investment under the laws of such jurisdictions as the managing
underwriters and the Investor may designate); printing expenses, messenger,
telephone and delivery expenses; fees and disbursements of counsel for the
Company and fees and expenses for independent certified public accountants
retained by the Company (including the expenses of any comfort letters or costs
associated with the delivery by independent certified public accountants of a
comfort letter or comfort letters requested pursuant to Section 4(m) hereof);
securities acts liability insurance, if the Company so desires; all internal
expenses of the Company (including, without limitation, all salaries and
expenses of its officers and employees performing legal or accounting duties);
the expense of any annual audit; the fees and expenses incurred in connection
with the listing of the securities to be registered on each securities exchange
on which similar securities issued by the Company are then listed; and the fees
and expenses of any Person, including special experts, retained by the Company
(all such expenses being herein called "Registration Expenses") will be borne by
the Company regardless of whether the Registration Statement becomes effective.
The Company shall not have any obligation to pay any underwriting fees,
discounts or commissions attributable to the sale of Registrable Securities, or
any legal fees and expenses of counsel to the Investor, except as expressly
provided herein.

         6.       Indemnification: Contribution.

                  (a)    Indemnification by Company. The Company agrees to
indemnify and hold harmless the Investor, each Pecuniary Owner and their
respective partners, officers, directors, employees and agents, and each Person
who controls any such Persons (within the meaning of Section 15 of the
Securities Act or Section 20 of the Exchange Act) against all losses, claims,
damages, liabilities and reasonable expenses arising out of or based upon any
untrue or alleged untrue statement of a material fact contained in any
Registration Statement, Prospectus or preliminary 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 not misleading, except insofar as
the same are caused by or contained in any information furnished in writing to
the Company by the Investor or such Pecuniary Owner, as the case may be,
expressly for use therein. The Company will also indemnify underwriters, selling
brokers, dealer managers and similar securities industry professionals
participating in the distribution, their officers and trust managers and each
Person who controls such Persons (within the meaning of Section 15 of the
Securities Act or Section 20 of the Exchange Act) to the same extent as provided
above with respect to the indemnification of the Investor, if requested.

                  (b)    Indemnification By Holder of Registrable Securities.
The Investor and each Pecuniary Owner, severally and not jointly, agrees to
indemnify and hold harmless the Company and its trust managers, officers,
employees and agents, and each Person who controls the Company

                                       11

<PAGE>   12



(within the meaning of Section 15 of the Securities Act or Section 20 of the
Exchange Act) against any losses, claims, damages, liabilities and reasonable
expenses resulting from any untrue statement of a material fact or any omission
of a material fact required to be stated in the Registration Statement or
Prospectus or preliminary prospectus or necessary to make the statements therein
not misleading, to the extent, but only to the extent, that such untrue
statement or omission is contained in any information or affidavit so furnished
in writing by the Investor, as agent for and on behalf of each Pecuniary Owner,
to the Company specifically for inclusion in such Registration Statement or
Prospectus. In no event shall the liability of the Investor or any Pecuniary
Owner hereunder be greater in amount than the dollar amount of the proceeds
received by such Person upon the sale of the Registrable Securities giving rise
to such indemnification obligation. The Company shall be entitled to receive
indemnities from underwriters, selling brokers, dealer managers and similar
securities industry professionals participating in the distribution, to the same
extent as provided above with respect to information so furnished in writing by
such Persons specifically for inclusion in any Prospectus or Registration
Statement.

                  (c)    Conduct of Indemnification Proceedings. Any Person
entitled to indemnification hereunder will (i) give prompt notice (and in any
event within 10 days) to the indemnifying party of any claim with respect to
which it seeks indemnification and (ii) permit such indemnifying party to assume
the defense of such claim with counsel reasonably satisfactory to the
indemnified party; provided, however that any Person entitled to indemnification
hereunder shall have the right to employ separate counsel and to participate in
the defense of such claim, but the fees and expenses of such counsel shall be at
the expense of such Person unless (a) the indemnifying party has agreed to pay
such fees or expenses, (b) the indemnifying party shall have failed to assume
the defense of such claim and employ counsel reasonably satisfactory to such
Person or (c) based upon written advice of counsel to such Person, there shall
be one or more defenses available to such Person that are not available to the
indemnifying party or there shall exist conflicts of interest pursuant to
applicable rules of professional conduct between such Person and the
indemnifying party (in which case, if the Person notifies the indemnifying party
in writing that such Person elects to employ separate counsel at the expense of
the indemnifying party, the indemnifying party shall not have the right to
assume the defense of such claim on behalf of such Person), in each of which
events the fees and expenses of such counsel shall be at the expense of the
indemnifying party. The indemnifying party will not be subject to any liability
for any settlement made without its consent (but such consent will not be
unreasonably withheld), but if settled with its written consent, or if there be
a final judgment for the plaintiff in any such action or proceeding, the
indemnifying party shall indemnify and hold harmless the indemnified parties
from and against any loss or liability (to the extent stated above) by reason of
such settlement or judgment. No indemnified party will be required to consent to
entry of any judgment or enter into any settlement which does not include as an
unconditional term thereof the giving by the claimant or plaintiff to such
indemnified party of a release from all liability in respect to such claim or
litigation.

                  (d)    Contribution. If for any reason the indemnification
provided for in the preceding clauses (a) and (b) is unavailable to an
indemnified party or insufficient to hold it harmless as contemplated by the
preceding clauses (a) and (b), then the indemnifying party shall contribute

                                       12

<PAGE>   13



to the amount paid or payable by the indemnified party as a result of such loss,
claim, damage or liability in such proportion as is appropriate to reflect not
only the relative benefits received by the indemnified party and the
indemnifying party, but also the relative fault of the indemnified party and the
indemnifying party, as well as any other relevant equitable considerations,
provided, that in no event shall the Investor or any Pecuniary Owner be required
to contribute an amount greater than the dollar amount of the proceeds received
by Investor with respect to the sale of the Registrable Securities giving rise
to such indemnification obligation. The relative fault of the Company on the one
hand and of the Investor and each Pecuniary Owner on the other shall be
determined by reference to, among other things, whether the untrue or alleged
untrue statement of a material fact or the omission or alleged omission to state
a material fact relates to information supplied by such party, and the parties'
relative intent, knowledge, access to information, and opportunity to correct or
prevent such statement or omission. No Person guilty of fraudulent
misrepresentation (within the meaning of Section 10(f) of the Securities Act)
shall be entitled to contribution from any Person who was not guilty of such
fraudulent misrepresentation.

         7.       Rule 144. The Company hereby agrees that it will file the
reports required to be filed by it under the Securities Act and the Exchange Act
and the rules and regulations adopted by the SEC thereunder (or, if the Company
is not required to file such reports, it will, upon the request of the Investor,
make publicly available other information so long as necessary to permit sales
pursuant to Rule 144 under the Securities Act), and it will take such further
action as the Investor may reasonably request, all to the extent required from
time to time to enable the Investor to sell Registrable Securities without
registration under the Securities Act within the limitation of the exemptions
provided by (a) Rule 144 under the Securities Act, as such Rule may be amended
from time to time, or (b) any similar rule or regulation hereafter adopted by
the SEC. Upon the request of the Investor, the Company will deliver to the
Investor a written statement as to whether it has complied with such information
and requirements.

         8.       Participation in Underwritten Registrations.

                  (a)    If any of the Registrable Securities covered by the
Shelf Registration are to be sold in an Underwritten Offering (excluding under
Section 2(c)), the investment banker or investment bankers and manager or
managers that will administer the offering will be selected by the Investor
holding in the aggregate in excess of 50% of the Registrable Securities covered
thereby; provided that such investment bankers and managers must be reasonably
satisfactory to the Company.

                  (b)    No Person may participate in any Underwritten
Registration hereunder unless such Person (i) agrees to sell such Person's
securities on the basis provided in any underwriting arrangements approved by
the Persons entitled hereunder to approve such arrangements and (ii) completes
and executes all questionnaires, powers of attorney, indemnities, underwriting
agreements and other documents required under the terms of such underwriting
arrangements. Nothing in this Section 8 shall be construed to create any
additional rights regarding the registration of Registrable Securities in any
Person otherwise than as set forth herein.

                                       13

<PAGE>   14



         9.       Miscellaneous.

                  (a)    Remedies. Each party hereto, in addition to being
entitled to exercise all rights provided herein or granted by law, including
recovery of damages, will be entitled to specific performance of its rights
under this Agreement to the extent available under applicable law. Each party
hereto agrees that monetary damages would not be adequate compensation for any
loss incurred by reason of a breach by it of the provisions of this Agreement
and hereby agrees to waive the defense in any action for specific performance
that a remedy at law would be adequate.

                  (b)    Third Party Registration Rights. The Company will not
after the date of this Agreement, enter into any agreement granting registration
rights to any other Person with respect to the securities of the Company that
are not junior or subordinate to the rights granted to the Investor hereunder
without the written consent of the Investor. The Company hereby represents and
warrants to the Investor that it has obtained all necessary consents or waivers
of Realco, the Morgan Entities and Praedium in connection with the execution of
this Agreement and the consummation of the transactions contemplated hereby.

                  (c)    Amendments and Waivers. The provisions of this
Agreement, including the provisions of this sentence, may not be amended,
modified or supplemented, and waivers or consents to departures from the
provisions hereof may not be given without the written consent of the Company
and Investor.

                  (d)    Notices. The notice provisions contained in Section
12.11 of the Purchase Agreement shall be incorporated herein and shall be
governing under this Agreement.

                  (e)    Successors and Assigns. This Agreement shall inure to
the benefit of and be binding upon the successors and assigns of each of the
parties, including without limitation and without the need for an express
assignment, subsequent holders of Registrable Securities, provided further, that
the Company cannot assign its rights hereunder except pursuant to a merger.

                  (f)    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.

                  (g)    Headings. The headings in this Agreement are for
convenience of reference only and shall not limit or otherwise affect the
meaning hereof.

                  (h)    Governing Law. THIS AGREEMENT, AND THE RIGHTS AND
OBLIGATIONS OF THE PARTIES HERETO, SHALL BE GOVERNED BY AND CONSTRUED AND
ENFORCED IN ACCORDANCE WITH THE INTERNAL SUBSTANTIVE LAWS OF THE STATE OF TEXAS,
WITHOUT REGARD TO ITS PRINCIPLES OF CONFLICTS OF LAWS.


                                       14

<PAGE>   15



                  (i)    Severability. If any provision of this Agreement is
held to be illegal, invalid or unenforceable under any current or future law,
and if the rights or obligations of the parties under this Agreement would not
be materially and adversely affected thereby, such provision shall be fully
separable, and this Agreement shall be construed and enforced as if such
illegal, invalid or unenforceable provision had never comprised a part thereof,
and the remaining provisions of this Agreement shall remain in full force and
effect and shall not be affected by the illegal, invalid or unenforceable
provision or by its severance therefrom. In lieu of such illegal, invalid or
unenforceable provision, there shall be added simultaneously as a part of this
Agreement, a legal, valid and enforceable provision as similar in terms to such
illegal, invalid or unenforceable provision as may be possible, and the parties
hereto request the court or any arbitrator to whom disputes relating to this
Agreement are submitted to reform the otherwise illegal, invalid or
unenforceable provision in accordance with this Section 9(i).

                  (j)    Arbitration. In the event of a dispute hereunder which
cannot be resolved by the parties, such dispute shall be settled by arbitration
in accordance with the Commercial Arbitration Rules of the American Arbitration
Association and judgment on the award rendered by the arbitration panel may be
entered in any court or tribunal of competent jurisdiction. Any arbitration
occurring under this Section 9(j) shall be held in Dallas, Texas.

                  (k)    Entire Agreement. This Agreement is intended by the
parties as a final expression of their agreement and intended to be a complete
and exclusive statement of the agreement and understanding of the parties hereto
in respect of the subject matter contained herein. This Agreement supersedes all
prior agreements and understandings between the parties with respect to such
subject matter, including, but not limited to, the Prior Registration Rights
Agreement.

                  (l)    Attorneys' Fees. In any proceeding brought to enforce
any provision of this Agreement the successful party shall be entitled to
recover reasonable attorneys' and accountants' fees in addition to its costs and
expenses and any other available remedy.

                  (m)    Investor as Agent. (i) The Company acknowledges and
agrees that each of the Pecuniary Owners has initially appointed the Investor to
act as its agent and on its behalf in connection with the matters contemplated
by this Agreement. Until such time as the Company shall have received a written
notice from any Pecuniary Owner or the Investor that the Investor is no longer
acting as such Pecuniary Owner's agent hereunder, the Company shall be entitled
to rely on any instructions and notices received from the Investor on behalf of
Pecuniary Owner as if received from such Pecuniary Owner directly. The parties
hereto further acknowledge and agree that Investor shall act solely as agent for
and on behalf of the Pecuniary Owners in connection with the matters set forth
in this Agreement, and that the Investor shall not, under any circumstances,
have any liability to the Company in its individual capacity arising out of or
in connection with this Agreement or the transactions contemplated hereby.

                  (ii)   In the event that any Pecuniary Owner shall at anytime
subsequent to the date hereof appoint a successor agent to the Investor in
connection with the matters set forth in this

                                       15

<PAGE>   16


Agreement, such successor shall be entitled to, and to exercise on behalf of
such Pecuniary Owner, all of the rights and remedies provided for herein with
respect to the Investor or such Pecuniary Owner, as the case may be, and the
rights and remedies of such Pecuniary Owner hereunder shall not in any way be
modified, limited, delayed or impaired as a consequence of such appointment.

                  (iii)  The provisions of Sections 5, 6 and of this Section 
9(m) shall remain in full force and effect with respect to the Investor
notwithstanding any termination of the Investor's appointment as agent for and
on behalf of any or all of the Pecuniary Owners hereunder.

                  (iv)   Reference herein to the Investor "holding" Registrable
Securities shall mean holding such securities, as agent for and on behalf of the
Pecuniary Owners.

                  (n)    Representation of the Trust. The Trust hereby
represents and warrants to Investor that the rights granted to Investor
hereunder are pari passu to the registration rights granted by the Trust to each
of Praedium, the Morgan Entities, USAA and DDR.

         IN WITNESS WHEREOF, the parties hereto have executed this Second
Amended and Restated Registration Rights Agreement as of the date first written
above.

                             "COMPANY"

                             AMERICAN INDUSTRIAL PROPERTIES REIT
    
                             /s/ Charles W. Wolcott
                             ---------------------------------------------------
                             Charles W. Wolcott
                             President and Chief Executive Officer

                             "INVESTOR"

                             LaSalle Advisors Limited Partnership,
                             as agent for and on behalf of its Pecuniary Owners

                             /s/ Stanley J. Kraska, Jr.
                             ---------------------------------------------------
                             Stanley J. Kraska, Jr.
                             Managing Director

                             ABKB/LaSalle Securities Limited Partnership,
                             as agent for and on behalf of its Pecuniary Owners

                             /s/ Stanley J. Kraska, Jr.
                             ---------------------------------------------------
                             Stanley J. Kraska, Jr.
                             Managing Director


                                       16

<PAGE>   1
                                                                    EXHIBIT 10.8





                                  July 30, 1998



Developers Diversified Realty Corporation
34555 Chagrin Boulevard
Moreland Hills, Ohio

     Re:  Voting Agreement

Ladies and Gentlemen:

     The undersigned understands that Developers Diversified Realty Corporation,
an Ohio corporation ("DDRC"), and American Industrial Properties REIT, a Texas
real estate investment trust ("AIP"), are entering into a Share Purchase
Agreement to be dated on or about the date hereof (the "Purchase Agreement"),
and, together with DDR Office Flex Corporation, a Delaware corporation, a Merger
Agreement to be dated on or about the date hereof (the "Merger Agreement" and,
together with the Purchase Agreement, the "Agreements"), providing for, among
other things, the purchase of common shares, $.10 par value per share, of AIP by
DDRC (the "Share Purchase"). Under the rules of the New York Stock Exchange,
consummation of the Share Purchase will require the approval of the shareholders
of AIP.

     The undersigned is a shareholder of AIP (the "Shareholder") and is entering
into this letter agreement at your request, in exchange for good and valuable
consideration, the receipt and sufficiency of which is hereby acknowledged, to
induce you to enter into the Agreements and to consummate the transactions
contemplated thereby.

     The Shareholder confirms its agreement with you as follows:

     1.   The Shareholder represents and warrants that Schedule I annexed hereto
          sets forth the shares of beneficial interest of AIP of which the
          Shareholder or any affiliate (as defined under the Securities Exchange
          Act of 1934, as amended) of the Shareholder controlled by the
          Shareholder (a "Controlled Affiliate") is the beneficial owner (the
          "Shares") and that the Shareholder and the Controlled Affiliates are
          on the date hereof the lawful owners of the number of Shares set forth
          in Schedule I, free and clear of all liens, charges, encumbrances,
          voting agreements and commitments of any kind, except as disclosed in
          Schedule I. Except for the Shares set forth in Schedule I, neither the
          Shareholder nor any Controlled Affiliate owns or holds any rights to
          acquire any additional shares of beneficial interest of AIP (other
          than pursuant to options or conversion rights with regard to any of
          the Shares, in each case as disclosed in Schedule I) or any interest
          therein or any


<PAGE>   2


Developers Diversified Realty Corporation
July 30, 1998
Page 2

          voting rights with respect to any such additional shares.

     2.   Until the earliest date referred to in Section 12, the Shareholder
          agrees that it will not, and will not permit any Controlled Affiliate
          to, contract to sell, sell or otherwise transfer or dispose of any of
          the Shares or any interest therein or securities convertible into
          shares of beneficial interest of AIP, or any voting rights with
          respect thereto, without your prior written consent.

     3.   The Shareholder agrees that, during the term of this letter agreement,
          neither it nor any Controlled Affiliate will take any action that AIP
          would at that time be prohibited from taking under Section 5.4 of the
          Purchase Agreement.

     4.   The Shareholder agrees that during the term of this letter agreement
          (a) all of the shares of beneficial interest of AIP beneficially owned
          by the Shareholder or any Controlled Affiliate, or over which the
          Shareholder or any Controlled Affiliate has voting power or control,
          directly or indirectly, including any such shares acquired after the
          date hereof at the record date for any meeting of shareholders of AIP
          called to consider and vote on the Share Purchase and the Agreements
          and the transactions contemplated thereby or any Competing Transaction
          (as such term is defined in the Purchase Agreement) will be voted by
          the Shareholder or such Controlled Affiliates, or any representative
          or proxy thereof, as applicable, in favor of the approval of the Share
          Purchase and the Agreements and the transactions contemplated thereby
          and (b) neither the Shareholder nor any Controlled Affiliate, nor any
          such representative or proxy will vote any such Shares in favor of any
          Competing Transaction.

     5.   The Shareholder agrees that the shares referred to in Section 4 above,
          owned at the record date for any meeting of shareholders of AIP called
          to consider and vote on the election of members of the Board of Trust
          Managers of the Trust (the "Board"), will be voted by the Shareholder
          or any Controlled Affiliate, or any representative or proxy thereof,
          as applicable, in favor of the approval of the election of the
          representatives of DDRC to the Board for so long as DDRC has the right
          to nominate members of the Board under the Purchase Agreement.

     6.   The Shareholder hereby appoints Marc A. Simpson to attend the special
          meeting of the shareholders of AIP held to consider and vote on


<PAGE>   3


Developers Diversified Realty Corporation
July 30, 1998
Page 3

          the Share Purchase and to vote the shares referred to in Section 4
          above, with all the power the Shareholder would possess if personally
          present, in favor of the approval of the Share Purchase, the
          Agreements and the transactions contemplated thereby. The Shareholder
          agrees to execute, and to cause each Controlled Affiliate to execute,
          such proxies and other instruments, and to take and to cause each
          Controlled Affiliate to take such actions, as may be necessary to
          cause all of those shares to be so voted.

     7.   The Shareholder has all necessary power and authority to enter into
          this letter agreement. This letter agreement is the legal, valid and
          binding agreement of the Shareholder, and is enforceable against the
          Shareholder in accordance with its terms, subject to applicable
          bankruptcy, insolvency, fraudulent conveyance, reorganization,
          moratorium and similar laws affecting creditors' rights and remedies
          generally and to general principles of equity. This letter agreement
          shall inure to the benefit of the parties hereto and the successors
          and assigns of DDRC.

     8.   The Shareholder agrees that damages are an inadequate remedy for the
          breach by Shareholder of any term or condition of this letter
          agreement and that you shall be entitled to a temporary restraining
          order and preliminary and permanent injunctive relief in order to
          enforce our agreements herein.

     9.   Except to the extent that the laws of the jurisdiction of organization
          of any party hereto, or any other jurisdiction, are mandatorily
          applicable to matters arising under or in connection with this letter
          agreement, this letter agreement shall be governed by the laws of the
          State of Ohio. All actions and proceedings arising out of or relating
          to this letter agreement shall be heard and determined in any United
          States District Court sitting in the Northern District of Ohio.

     10.  Each of the parties hereto irrevocably submits to the exclusive
          jurisdiction of any United States District Court located in the
          Northern District of Ohio, for the purpose of any action or proceeding
          arising out of or relating to this letter agreement and each of the
          parties hereto irrevocably agrees that all claims in respect of such
          action or proceeding may be heard and determined exclusively in any
          federal court sitting in the Northern District of Ohio. Each of the
          parties hereto agrees that a final judgment in any action or
          proceeding shall be conclusive and may


<PAGE>   4


Developers Diversified Realty Corporation
July 30, 1998
Page 4

          be enforced in other jurisdictions by suit on the judgment or in any
          other manner provided by law.

     Shareholder hereby irrevocably appoints CT Corporation as its lawful agent
in and for the State of Ohio, for and in its behalf, to accept and acknowledge
service of, and upon whom may be served, all necessary processes in any action,
suit, or proceeding arising under this Agreement that may be had or brought
against it in any federal court in the Northern District of Ohio, such service
of process or notice, or the acceptance thereof by said agent endorsed thereon,
to have the same force and effect as if served upon such corporation or
individual. Nothing in this Section 10 shall affect the right of any party
hereto to serve legal process in any other manner permitted by law. Shareholder
hereby waives all defenses of improper venue and forum non conveniens with
respect to any action, suit, or proceeding brought in the any United States
District Court located in the Northern District of Ohio and arising under this
letter agreement.

     11.  This letter agreement constitutes the entire agreement between the
          parties hereto with respect to the matters covered hereby and
          supersedes all prior agreements, understandings or representations
          between the parties, written or oral, with respect to the subject
          matter hereof.

     12.  This letter agreement and the proxy granted pursuant to Section 6
          hereof shall become effective upon the execution and delivery of the
          Agreements by the respective parties thereto. Except as otherwise
          provided herein, this letter agreement and the proxy granted pursuant
          to Section 6 hereof shall terminate automatically, without the need
          for any notice or other action by either party upon the earliest of
          (i) the date on which the Purchase Agreement and the Merger Agreement
          are terminated, (ii) the Second Closing Date, as defined in the
          Purchase Agreement, and (iii) the date that is 240 days after the date
          hereof.

     13.  Each of the parties hereto intends that AIP shall be a third party
          beneficiary of this letter agreement, and shall be entitled to the
          benefits hereof and shall have the ability to enforce the rights
          granted to DDRC herein as fully as if it were a signatory of this
          letter agreement.

     14.  Notwithstanding anything to the contrary contained herein, neither AIP
          nor any representative of the Shareholder serving on the Board of
          Trust Managers of AIP shall be deemed to be a Controlled Affiliate.



<PAGE>   5


Developers Diversified Realty Corporation
July 30, 1998
Page 5

     Please confirm that the foregoing correctly states the understanding
between us by signing and returning to me a counterpart hereof.

                                    Morgan Stanley Asset Management Inc., on
                                    behalf of certain of its clients with
                                    respect to shares of AIP over which it
                                    exercises investment discretion, and MS Real
                                    Estate Special Situations, Inc.


                                    By: /s/ Russell Platt
                                        --------------------------------------
                                    Name: Russell Platt
                                         -------------------------------------
                                    Title: Managing Director
                                          ------------------------------------



Confirmed on the date
first above written

Developers Diversified Realty Corporation


By: /s/ Scott A. Wolstein
   -------------------------------
Name: Scott A. Wolstein
     -----------------------------
Title: President
      ----------------------------



<PAGE>   6




                                   Schedule I

                   Ownership of Shares of Beneficial Interest


Owned Beneficially (including Options to Purchase Shares)

Trust Common Shares                 1,999,653


<PAGE>   1
                                                                    EXHIBIT 10.9


                                 July 30, 1998



Developers Diversified Realty Corporation
34555 Chagrin Boulevard
Moreland Hills, Ohio

         Re:     Voting Agreement

Ladies and Gentlemen:

                 The undersigned understands that Developers Diversified Realty
Corporation, an Ohio corporation ("DDRC"), and American Industrial Properties
REIT, a Texas real estate investment trust ("AIP"), are entering into a Share
Purchase Agreement to be dated on or about the date hereof (the "Purchase
Agreement"), and, together with DDR Office Flex Corporation, a Delaware
corporation, a Merger Agreement to be dated on or about the date hereof (the
"Merger Agreement" and, together with the Purchase Agreement, the
"Agreements"), providing for, among other things, the purchase of common
shares, $.10 par value per share, of AIP by DDRC (the "Share Purchase").  Under
the rules of the New York Stock Exchange, consummation of the Share Purchase
will require the approval of the shareholders of AIP.

                 The undersigned is a shareholder of AIP (the "Shareholder")
and is entering into this letter agreement at your request, in exchange for
good and valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, to induce you to enter into the Agreements and to consummate the
transactions contemplated thereby.

                 The Shareholder confirms its agreement with you as follows:

                 1.       The Shareholder represents and warrants that is the 
                          beneficial owner of the shares of beneficial interest
                          AIP listed on Schedule I annexed hereto (the "Shares")
                          of which the Shareholder or any affiliate (as defined
                          under the Securities Exchange Act of 1934, as amended)
                          of the Shareholder controlled by the Shareholder (a
                          "Controlled Affiliate") that has the power to vote or
                          to make recommendations regarding voting, and that the
                          Shareholder and the Controlled Affiliates, or the
                          clients on whose behalf the Shareholder or any
                          Controlled Person acts as a fiduciary, are, to the
                          best of the Shareholder's knowledge, on the date
                          hereof the lawful owners of the number of Shares set
                          forth in Schedule I, free and clear of all liens,
                          charges, encumbrances, voting agreements and
                          commitments of any kind, except as disclosed in
                          Schedule I.  Except for the Shares set forth in
                          Schedule I, neither the Shareholder nor any Controlled
                          Affiliate owns or holds any rights to acquire any
                          additional shares of beneficial interest of 


<PAGE>   2
Developers Diversified Realty Corporation
July 30, 1998
Page 2

                          AIP (other than pursuant to options or conversion
                          rights with regard to any of the Shares, in each case
                          as disclosed in Schedule I) or any interest therein
                          or any voting rights with respect to any such
                          additional shares.


                 2.       Until the earliest date referred to in 12, the 
                          Shareholder agrees that it will not, and will not
                          permit any Controlled Affiliate to, contract to sell,
                          sell or otherwise transfer or dispose of any of the
                          Shares or any interest therein or securities
                          convertible into shares of beneficial interest of AIP,
                          or any voting rights with respect thereto, without
                          your prior written consent.

                 3.       The Shareholder agrees that, during the term of this 
                          letter agreement, neither it nor any Controlled
                          Affiliate will take any action that AIP would be
                          prohibited from taking under Section 5.4 of the
                          Purchase Agreement.

                 4.       The Shareholder agrees that during the term of this 
                          letter agreement (a) all of the shares of beneficial
                          interest of AIP beneficially owned by the Shareholder
                          or any Controlled Affiliate, or over which the
                          Shareholder or any Controlled Affiliate has voting
                          power or control, directly or indirectly, including
                          any such shares acquired after the date hereof at the
                          record date for any meeting of shareholders of AIP
                          called to consider and vote on the Share Purchase and
                          the Agreements and the transactions contemplated
                          thereby or any Competing Transaction (as such term is
                          defined in the Purchase Agreement) will be voted by
                          the Shareholder or such Controlled Affiliates, or any
                          representative or proxy thereof, or that the
                          Shareholders will recommend that such Shares be voted,
                          as applicable, in favor of the approval of the Share
                          Purchase and the Agreements and the transactions
                          contemplated thereby and (b) neither the Shareholder
                          nor any Controlled Affiliate, nor any such
                          representative or proxy will vote any such Shares or
                          recommend that such Shares be voted, in favor of any
                          Competing Transaction, in each case except to the
                          extent that the Shareholder determines in its good
                          faith judgment, after consultation with its legal
                          counsel, that it is prudent to vote or recommend
                          otherwise in the exercise of its fiduciary
                          obligations.

                 5.       The Shareholder agrees that the shares referred to in 
                          Section 4 above, owned at the record date for any
                          meeting of shareholders of AIP called to consider and
                          vote on the election of members of the Board of Trust
                          Managers of the Trust (the "Board"), will be voted by
                          the Shareholder or any Controlled Affiliate, or any
                          representative or proxy
<PAGE>   3
Developers Diversified Realty Corporation
July 30, 1998
Page 3

                          thereof, or that the Shareholder will recommend that
                          such Shares be voted, as applicable, in favor of the
                          approval of the election of the representatives of
                          DDRC to the Board for so long as DDRC has the right
                          to nominate members of the Board under the Purchase
                          Agreement, in each case except to the extent that the
                          Shareholder determines in its good faith judgment,
                          after consultation with its legal counsel, that it is
                          prudent to vote or recommend otherwise in the
                          exercise of its fiduciary obligations.

                 6.       The Shareholder hereby appoints Marc A. Simpson to 
                          attend the special meeting of the shareholders of AIP
                          held to consider and vote on the Share Purchase and to
                          vote the shares referred to in Section 4 above, with
                          all the power the Shareholder would possess if
                          personally present, in favor of the approval of the
                          Share Purchase, the Agreements and the transactions
                          contemplated thereby.  The Shareholder agrees to
                          execute, and to cause each Controlled Affiliate to
                          execute, such proxies and other instruments, and to
                          take and to cause each Controlled Affiliate to take
                          such actions, as may be necessary to cause all of
                          those shares to be so voted.

                 7.       The Shareholder has all necessary power and authority 
                          to enter into this letter agreement.  This letter
                          agreement is the legal, valid and binding agreement of
                          the Shareholder, and is enforceable against the
                          Shareholder in accordance with its terms, subject to
                          applicable bankruptcy, insolvency, fraudulent
                          conveyance, reorganization, moratorium and similar
                          laws affecting creditors' rights and remedies
                          generally and to general principles of equity.  This
                          letter agreement shall inure to the benefit of the
                          parties hereto and the successors and assigns of DDRC.

                 8.       The Shareholder agrees that damages are an inadequate 
                          remedy for the breach by Shareholder of any term or
                          condition of this letter agreement and that you shall
                          be entitled to a temporary restraining order and
                          preliminary and permanent injunctive relief in order
                          to enforce our agreements herein.

                 9.       Except to the extent that the laws of the jurisdiction
                          of organization of any party hereto, or any other
                          jurisdiction, are mandatorily applicable to matters
                          arising under or in connection with this letter
                          agreement, this letter agreement shall be governed by
                          the laws of the State of Ohio.  All actions and
                          proceedings arising out of or relating to this letter
                          agreement shall be heard and determined in any United
                          States District Court sitting in the Northern District
                          of Ohio.
<PAGE>   4
Developers Diversified Realty Corporation
July 30, 1998
Page 4


                 10.      Each of the parties hereto irrevocably submits to the
                          exclusive jurisdiction of any United States District
                          Court located in the Northern District of Ohio, for
                          the purpose of any action or proceeding arising out of
                          or relating to this letter agreement and each of the
                          parties hereto irrevocably agrees that all claims in
                          respect of such action or proceeding may be heard and
                          determined exclusively in any federal court sitting in
                          the Northern District of Ohio.  Each of the parties
                          hereto agrees that a final judgment in any action or
                          proceeding shall be conclusive and may be enforced in
                          other jurisdictions by suit on the judgment or in any
                          other manner provided by law.

                 Shareholder hereby irrevocably appoints A.G.C. Co., 1900 East
9th Street, Suite 3200, Cleveland, Ohio, as its lawful agent in and for the
State of Ohio, for and in its behalf, to accept and acknowledge service of, and
upon whom may be served, all necessary processes in any action, suit, or
proceeding arising under this Agreement that may be had or brought against it
in any federal court in the Northern District of Ohio, such service of process
or notice, or the acceptance thereof by said agent endorsed thereon, to have
the same force and effect as if served upon such corporation or individual.
Nothing in this Section 10 shall affect the right of any party hereto to serve
legal process in any other manner permitted by law.  Shareholder hereby waives
all defenses of improper venue and forum non conveniens with respect to any
action, suit, or proceeding brought in the any United States District Court
located in the Northern District of Ohio and arising under this letter
agreement.

                 11.      This letter agreement constitutes the entire agreement
                          between the parties hereto with respect to the matters
                          covered hereby and supersedes all prior agreements,
                          understandings or representations between the parties,
                          written or oral, with respect to the subject matter
                          hereof.

                 12.      This letter agreement and the proxy granted pursuant
                          to Section 6 hereof shall become effective upon the
                          execution and delivery of the Agreements by the
                          respective parties thereto.  Except as otherwise
                          provided herein, this letter agreement and the proxy
                          granted pursuant to Section 6 hereof shall terminate
                          automatically, without the need for any notice or
                          other action by either party upon the earliest of (i)
                          the date on which the Purchase Agreement and the
                          Merger Agreement are terminated, (ii) the Second
                          Closing Date, as defined in the Purchase Agreement,
                          and (iii) the date that is 240 days after the date
                          hereof.

                 13.      Each of the parties hereto intends that AIP shall be a
                          third party beneficiary of this letter agreement, and
                          shall be entitled to the benefits hereof and shall
                          have the ability to exercise the rights granted to
                          DDRC herein as fully as if it were a signatory of this
                          letter agreement.
<PAGE>   5
Developers Diversified Realty Corporation
July 30, 1998
Page 5

                 14.      Notwithstanding anything to the contrary contained
                          herein, neither AIP nor any representative of the
                          Shareholder serving on the Board of Trust Managers of
                          AIP shall be deemed to be a Controlled Affiliate.

                 Please confirm that the foregoing correctly states the
understanding between us by signing and returning to me a counterpart hereof.

                                  LaSalle Advisors Limited Partnership
                                  
                                  
                                  By: /s/ [Illegible]
                                     -----------------------------------------
                                  Name: Illegible
                                       ---------------------------------------
                                  Title:   Illegible
                                        --------------------------------------
                                  
                                  ABKB/LaSalle Securities Limited Partnership
                                  
                                  By: /s/ [Illegible]
                                     -----------------------------------------
                                  Name: [Illegible]
                                       ---------------------------------------
                                  Title: [Illegible]
                                        --------------------------------------


Confirmed on the date
first above written

Developers Diversified Realty Corporation


By: /s/ Scott A. Wolstein 
   ----------------------------------------
Name: Scott A. Wolstein 
     --------------------------------------
Title: President 
      -------------------------------------
<PAGE>   6

                                   Schedule I

                   Ownership of Shares of Beneficial Interest


Owned Beneficially (including Options to Purchase Shares)

<TABLE>
<CAPTION>
                                                                        Total Number of Shares
                                                                         Beneficiallly Owned
                                                                         -------------------

 <S>                                                                           <C>
 LaSalle Securities                                                            960,425

 LaSalle Advisors                                                              542,153
</TABLE>

<PAGE>   1
                                                                   EXHIBIT 10.10


                                  July 30, 1998



Developers Diversified Realty Corporation
34555 Chagrin Boulevard
Moreland Hills, Ohio

   Re:  Voting Agreement

Ladies and Gentlemen:

        The undersigned understands that Developers Diversified Realty
Corporation, an Ohio corporation ("DDRC"), and American Industrial Properties
REIT, a Texas real estate investment trust ("AIP"), are entering into a Share
Purchase Agreement to be dated on or about the date hereof (the "Purchase
Agreement"), and, together with DDR Office Flex Corporation, a Delaware
corporation, a Merger Agreement to be dated on or about the date hereof (the
"Merger Agreement" and, together with the Purchase Agreement, the "Agreements"),
providing for, among other things, the purchase of common shares, $.10 par value
per share, of AIP by DDRC (the "Share Purchase"). Under the rules of the New
York Stock Exchange, consummation of the Share Purchase will require the
approval of the shareholders of AIP.

        The undersigned is a shareholder of AIP (the "Shareholder") and is
entering into this letter agreement at your request, in exchange for good and
valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, to induce you to enter into the Agreements and to consummate the
transactions contemplated thereby.

        The Shareholder confirms its agreement with you as follows:

        1. The Shareholder represents and warrants that Schedule I annexed
hereto sets forth the shares of beneficial interest of AIP of which the
Shareholder is the beneficial owner (the "Shares") and that the Shareholder is
on the date hereof the lawful owner of the number of Shares set forth in
Schedule I, free and clear of all liens, charges, encumbrances, voting
agreements and commitments of any kind, except as disclosed in Schedule I.
Except for the Shares set forth in Schedule I, the Shareholder does not own or
hold any rights to acquire any additional shares of beneficial interest of AIP
(other than pursuant to options or conversion rights with regard to any of the
Shares, in each case as disclosed in Schedule I) or any interest therein or any
voting rights with respect to any such additional shares. The Shareholder
represents and warrants that there are no affiliates of the Shareholder
controlled by the Shareholder. The Shareholder covenants that, in the event that
an affiliate of the Shareholder controlled by the Shareholder exists during the
term of this letter agreement, the Shareholder will cause such affiliate to act
in accordance with the terms of this letter agreement as if such affiliate were
the Shareholder. The Shareholder may, during the term of this letter agreement,
pledge the Shares, provided that each pledgee or transferee of such Shares has
agreed to be bound by the terms of this letter agreement. 


<PAGE>   2
Developers Diversified Realty Corporation
July 30, 1998
Page 2


        2. Until the earliest date referred to in Section 12, the Shareholder
agrees that it will not contract to sell, sell or otherwise transfer or dispose
of any of the Shares or any interest therein or securities convertible into
shares of beneficial interest of AIP, or any voting rights with respect thereto,
without your prior written consent. 

        3. The Shareholder agrees that, during the term of this letter agreement
it will not take any action that AIP would at that time be prohibited from
taking under Section 5.4 of the Purchase Agreement.

        4. The Shareholder agrees that during the term of this letter agreement
(a) all of the shares of beneficial interest of AIP beneficially owned by the
Shareholder or over which the Shareholder has voting power or control, directly
or indirectly, including any such shares acquired after the date hereof at the
record date for any meeting of shareholders of AIP called to consider and vote
on the Share Purchase and the Agreements and the transactions contemplated
thereby or any Competing Transaction (as such term is defined in the Purchase
Agreement) will be voted by the Shareholder or any representative or proxy
thereof, as applicable, in favor of the approval of the Share Purchase and the
Agreements and the transactions contemplated thereby and (b) neither the
Shareholder nor any such representative or proxy will vote any such Shares in
favor of any Competing Transaction.

        5. The Shareholder agrees that the shares referred to in Section 4
above, owned at the record date for any meeting of shareholders of AIP called to
consider and vote on the election of members of the Board of Trust Managers of
the Trust (the "Board"), will be voted by the Shareholder or any representative
or proxy thereof, as applicable, in favor of the approval of the election of the
representatives of DDRC to the Board for so long as DDRC the term of this letter
agreement.

        6. The Shareholder hereby appoints Marc A. Simpson to attend the special
meeting of the shareholders of AIP held to consider and vote on the Share
Purchase and to vote the shares referred to in Section 4 above, with all the
power the Shareholder would possess if personally present, in favor of the
approval of the Share Purchase, the Agreements and the transactions contemplated
thereby. The Shareholder agrees to execute such proxies and other instruments as
may be necessary to cause all of those shares to be so voted.

        7. The Shareholder has all necessary power and authority to enter into
this letter agreement. This letter agreement is the legal, valid and binding
agreement of the Shareholder, and is enforceable against the Shareholder in
accordance with its terms, subject to applicable bankruptcy, insolvency,
fraudulent conveyance, reorganization, moratorium and similar laws affecting
creditors' rights and remedies generally and to general principles of equity.
This letter agreement shall inure to the benefit of the parties hereto and the
successors and assigns of DDRC.


<PAGE>   3
Developers Diversified Realty Corporation
July 30, 1998
Page 3


        8. The Shareholder agrees that damages are an inadequate remedy for the
breach by Shareholder of any term or condition of this letter agreement and that
you shall be entitled to a temporary restraining order and preliminary and
permanent injunctive relief in order to enforce our agreements herein.

        9. Except to the extent that the laws of the jurisdiction of
organization of any party hereto, or any other jurisdiction, are mandatorily
applicable to matters arising under or in connection with this letter agreement,
this letter agreement shall be governed by the laws of the State of Ohio. All
actions and proceedings arising out of or relating to this letter agreement
shall be heard and determined in any United States District Court sitting in the
Northern District of Ohio.

        10. Each of the parties hereto irrevocably submits to the exclusive
jurisdiction of any United States District Court located in the Northern
District of Ohio, for the purpose of any action or proceeding arising out of or
relating to this letter agreement and each of the parties hereto irrevocably
agrees that all claims in respect of such action or proceeding may be heard and
determined exclusively in any federal court sitting in the Northern District of
Ohio. Each of the parties hereto agrees that a final judgment in any action or
proceeding shall be conclusive and may be enforced in other jurisdictions by
suit on the judgment or in any other manner provided by law.

        Shareholder hereby irrevocably appoints CSC/United States Corporation
Companies, 16 East Broad Street, Columbus, Ohio 43215, as its lawful agent in
and for the State of Ohio, for and in its behalf, to accept and acknowledge
service of, and upon whom may be served, all necessary processes in any action,
suit, or proceeding arising under this Agreement that may be had or brought
against it in any federal court in the Northern District of Ohio, such service
of process or notice, or the acceptance thereof by said agent endorsed thereon,
to have the same force and effect as if served upon the Shareholder. Nothing in
this Section 10 shall affect the right of any party hereto to serve legal
process in any other manner permitted by law. Shareholder hereby waives all
defenses of improper venue and forum non conveniens with respect to any action,
suit, or proceeding brought in the any United States District Court located in
the Northern District of Ohio and arising under this letter agreement.

        11. This letter agreement constitutes the entire agreement between the
parties hereto with respect to the matters covered hereby and supersedes all
prior agreements, understandings or representations between the parties, written
or oral, with respect to the subject matter hereof.

        12. This letter agreement and the proxy granted pursuant to Section 6
hereof shall become effective upon the execution and delivery of the Agreements
by the respective parties thereto. Except as otherwise provided herein, this
letter agreement and the proxy granted pursuant to Section 6 hereof shall
terminate automatically, without the need for any notice or other action by
either party upon the earliest of (i) the date on which the Purchase Agreement
and 


<PAGE>   4
Developers Diversified Realty Corporation
July 30, 1998
Page 4


the Merger Agreement are terminated, (ii) the Second Closing Date, as defined in
the Purchase Agreement, and (iii) the date that is 240 days after the date
hereof.

        13. Each of the parties hereto intends that AIP shall be a third party
beneficiary of this letter agreement, and shall be entitled to the benefits
hereof and shall have the ability to enforce the rights granted to DDRC herein
as fully as if it were a signatory of this letter agreement.



<PAGE>   5


Developers Diversified Realty Corporation
July 30, 1998
Page 5


        Please confirm that the foregoing correctly states the understanding
between us by signing and returning to me a counterpart hereof.

                                Praedium II Industrial Associates LLC

                                By:  The Praedium Opportunity Fund II, L.P., its
                                     member


                                     By:  Praedium Advisors, Inc., its 
                                          managing general partner


                                          By: /s/ Christoper Hughes
                                             -----------------------------
                                          Name: Christopher Hughes
                                               ---------------------------
                                          Title: Vice President
                                                --------------------------

                                     By:  Praedium Partners, LLC, its 
                                          investment general partner

                                          By: /s/ Christopher Hughes
                                             -----------------------------
                                          Name: Christopher Hughes
                                               ---------------------------
                                          Title: Vice President
                                                --------------------------



Confirmed on the date
first above written

Developers Diversified Realty Corporation


By: /s/ Scott A. Wolstein
   ----------------------------------------
Name:Scott A. Wolstein
     --------------------------------------
Title: President
      -------------------------------------

<PAGE>   6
                                   Schedule I

                   Ownership of Shares of Beneficial Interest


<TABLE>
<CAPTION>
Owned Beneficially (including Options to Purchase Shares)
- ---------------------------------------------------------
<S>                                   <C>
Options                                   None

Trust Common Shares                    733,945
</TABLE>

<PAGE>   1
                                                                   EXHIBIT 10.11


                                  July 30, 1998



Developers Diversified Realty Corporation
34555 Chagrin Boulevard
Moreland Hills, Ohio

         Re:      Voting Agreement

Ladies and Gentlemen:

                  The undersigned understands that Developers Diversified Realty
Corporation, an Ohio corporation ("DDRC"), and American Industrial Properties
REIT, a Texas real estate investment trust ("AIP"), are entering into a Share
Purchase Agreement to be dated on or about the date hereof (the "Purchase
Agreement"), and, together with DDR Office Flex Corporation, a Delaware
corporation, a Merger Agreement to be dated on or about the date hereof (the
"Merger Agreement" and, together with the Purchase Agreement, the "Agreements"),
providing for, among other things, the purchase of common shares, $.10 par value
per share, of AIP by DDRC (the "Share Purchase"). Under the rules of the New
York Stock Exchange, consummation of the Share Purchase will require the
approval of the shareholders of AIP.

                  The undersigned is a shareholder of AIP (the "Shareholder")
and is entering into this letter agreement at your request, in exchange for good
and valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, to induce you to enter into the Agreements and to consummate the
transactions contemplated thereby.

                  The Shareholder confirms its agreement with you as follows:

                  1.       The Shareholder represents and warrants that Schedule
                           I annexed hereto sets forth the shares of beneficial
                           interest of AIP of which the Shareholder or any
                           affiliate (as defined under the Securities Exchange
                           Act of 1934, as amended) of the Shareholder
                           controlled by the Shareholder (a "Controlled
                           Affiliate") is the beneficial owner (the "Shares")
                           and that the Shareholder and the Controlled
                           Affiliates are on the date hereof the lawful owners
                           of the number of Shares set forth in Schedule I, free
                           and clear of all liens, charges, encumbrances, voting
                           agreements and commitments of any kind, except as
                           disclosed in Schedule I. Except for the Shares set
                           forth in Schedule I, neither the Shareholder nor any
                           Controlled Affiliate owns or holds any rights to
                           acquire any additional shares of beneficial interest
                           of AIP (other than pursuant to options or conversion
                           rights with regard to any of the Shares, in each case
                           as disclosed in Schedule I) or any interest therein
                           or any


<PAGE>   2


Developers Diversified Realty Corporation
July 30, 1998
Page 2

                           voting rights with respect to any such additional
                           shares.

                  2.       Until the earliest date referred to in Section 12,
                           the Shareholder agrees that it will not, and will not
                           permit any Controlled Affiliate to, contract to sell,
                           sell or otherwise transfer or dispose of any of the
                           Shares or any interest therein or securities
                           convertible into shares of beneficial interest of
                           AIP, or any voting rights with respect thereto,
                           without your prior written consent.

                  3.       The Shareholder agrees that, during the term of this
                           letter agreement, neither it nor any Controlled
                           Affiliate will take any action that AIP would at that
                           time be prohibited from taking under Section 5.4 of
                           the Purchase Agreement.

                  4.       The Shareholder agrees that during the term of this
                           letter agreement (a) all of the shares of beneficial
                           interest of AIP beneficially owned by the Shareholder
                           or any Controlled Affiliate, or over which the
                           Shareholder or any Controlled Affiliate has voting
                           power or control, directly or indirectly (including
                           any such shares acquired after the date hereof) at
                           the record date for any meeting of shareholders of
                           AIP called to consider and vote on the Share Purchase
                           and the Agreements and the transactions contemplated
                           thereby or any Competing Transaction (as such term is
                           defined in the Purchase Agreement) will be voted by
                           the Shareholder or such Controlled Affiliates, or any
                           representative or proxy thereof, as applicable, in
                           favor of the approval of the Share Purchase and the
                           Agreements and the transactions contemplated thereby
                           and (b) neither the Shareholder nor any Controlled
                           Affiliate, nor any such representative or proxy, will
                           vote any such Shares in favor of any Competing
                           Transaction.

                  5.       The Shareholder agrees that the shares referred to in
                           Section 4 above that are owned at the record date for
                           any meeting of shareholders of AIP called to consider
                           and vote on the election of members of the Board of
                           Trust Managers of the Trust (the "Board") will be
                           voted by the Shareholder or any Controlled Affiliate,
                           or any representative or proxy thereof, as
                           applicable, in favor of the approval of the election
                           of the representatives of DDRC to the Board for so
                           long as DDRC has the right to nominate members of the
                           Board under the Purchase Agreement.

                  6.       The Shareholder hereby appoints Marc A. Simpson to
                           attend the special meeting of the shareholders of AIP
                           held to consider and vote on


<PAGE>   3


Developers Diversified Realty Corporation
July 30, 1998
Page 3


                           the Share Purchase and to vote the shares referred to
                           in Section 4 above, with all the power the
                           Shareholder would possess if personally present, in
                           favor of the approval of the Share Purchase, the
                           Agreements and the transactions contemplated thereby.
                           The Shareholder agrees to execute, and to cause each
                           Controlled Affiliate to execute, such proxies and
                           other instruments, and to take and to cause each
                           Controlled Affiliate to take such actions, as may be
                           necessary to cause all of those shares to be so
                           voted.

                  7.       The Shareholder has all necessary power and authority
                           to enter into this letter agreement. This letter
                           agreement is the legal, valid and binding agreement
                           of the Shareholder, and is enforceable against the
                           Shareholder in accordance with its terms, subject to
                           applicable bankruptcy, insolvency, fraudulent
                           conveyance, reorganization, moratorium and similar
                           laws affecting creditors' rights and remedies
                           generally and to general principles of equity. This
                           letter agreement shall inure to the benefit of the
                           parties hereto and the successors and assigns of
                           DDRC.

                  8.       The Shareholder agrees that damages are an inadequate
                           remedy for the breach by Shareholder of any term or
                           condition of this letter agreement and that you shall
                           be entitled to a temporary restraining order and
                           preliminary and permanent injunctive relief in order
                           to enforce our agreements herein.

                  9.       Except to the extent that the laws of the
                           jurisdiction of organization of any party hereto, or
                           any other jurisdiction, are mandatorily applicable to
                           matters arising under or in connection with this
                           letter agreement, this letter agreement shall be
                           governed by the laws of the State of Ohio. All
                           actions and proceedings arising out of or relating to
                           this letter agreement shall be heard and determined
                           in any United States District Court sitting in the
                           Northern District of Ohio.

                  10.      Each of the parties hereto irrevocably submits to the
                           exclusive jurisdiction of any United States District
                           Court located in the Northern District of Ohio, for
                           the purpose of any action or proceeding arising out
                           of or relating to this letter agreement and each of
                           the parties hereto irrevocably agrees that all claims
                           in respect of such action or proceeding may be heard
                           and determined exclusively in any federal court
                           sitting in the Northern District of Ohio. Each of the
                           parties hereto agrees that a final judgment in any
                           action or proceeding shall be conclusive and may


<PAGE>   4


Developers Diversified Realty Corporation
July 30, 1998
Page 4

                           be enforced in other jurisdictions by suit on the
                           judgment or in any other manner provided by law.

                  The Shareholder hereby irrevocably appoints Jones, Day, Reavis
& Pogue, Cleveland, Ohio, as its lawful agent in and for the State of Ohio, for
and in its behalf, to accept and acknowledge service of, and upon whom may be
served, all necessary processes in any action, suit, or proceeding arising under
this Agreement that may be had or brought against it in any federal court in the
Northern District of Ohio, such service of process or notice, or the acceptance
thereof by said agent endorsed thereon, to have the same force and effect as if
served upon the Shareholder, provided that any such process or notice that may
be so served shall include a conspicuous statement to the effect that is to be
forwarded immediately to USAA Real Estate Company, 9830 Colonnade Boulevard,
Suite 600, San Antonio, Texas 78230-2239, Attention: Legal Counsel (with a copy
to Patricia J. Villareal, Jones, Day, Reavis & Pogue, 2001 Ross Avenue, Suite
2300, Dallas, Texas 75201). Nothing in this Section 10 shall affect the right of
any party hereto to serve legal process in any other manner permitted by law.
Shareholder hereby waives all defenses of improper venue and forum non
conveniens with respect to any action, suit, or proceeding brought in the any
United States District Court located in the Northern District of Ohio and
arising under this letter agreement.

                  11.      This letter agreement constitutes the entire
                           agreement between the parties hereto with respect to
                           the matters covered hereby and supersedes all prior
                           agreements, understandings or representations between
                           the parties, written or oral, with respect to the
                           subject matter hereof.

                  12.      This letter agreement and the proxy granted pursuant
                           to Section 6 hereof shall become effective upon the
                           execution and delivery of the Agreements by the
                           respective parties thereto. Except as otherwise
                           provided herein, this letter agreement and the proxy
                           granted pursuant to Section 6 hereof shall terminate
                           automatically, without the need for any notice or
                           other action by either party, upon the earliest of
                           (i) the date on which the Purchase Agreement and the
                           Merger Agreement are terminated, (ii) the Second
                           Closing Date, as defined in the Purchase Agreement,
                           and (iii) the date that is 240 days after the date
                           hereof.

                  13.      Each of the parties hereto intends that AIP shall be
                           a third party beneficiary of this letter agreement,
                           and shall be entitled to the benefits hereof and
                           shall have the ability to enforce the rights granted
                           to DDRC herein as fully as if it were a signatory of
                           this letter agreement.

                  14.      Notwithstanding anything to the contrary contained
                           herein, neither AIP nor any representative of the
                           Shareholder serving on the Board of Trust Managers of
                           AIP shall be deemed to be a Controlled Affiliate.



<PAGE>   5


Developers Diversified Realty Corporation
July 30, 1998
Page 5

                  Please confirm that the foregoing correctly states the
understanding between us by signing and returning to me a counterpart hereof.

                                            USAA Real Estate Company



                                            By: /s/ T. Patrick Duncan
                                                --------------------------------
                                            Name: T. Patrick Duncan
                                                  ------------------------------
                                            Title: SVP Operations & Finance
                                                   -----------------------------



Confirmed on the date
first above written

Developers Diversified Realty Corporation


By: /s/ Scott A. Wolstein
    -------------------------------------
Name: Scott A. Wolstein
      -----------------------------------
Title: President
       ----------------------------------




<PAGE>   6


                                   Schedule I

                   Ownership of Shares of Beneficial Interest


Owned Beneficially (including Options to Purchase Shares)


<TABLE>
<CAPTION>
                                            Shares             Shares
                                           Owned of          Subject to            Total
                                            Record            Options              Shares
                                           ---------         ----------           ---------
<S>                                        <C>                  <C>               <C>      
USAA Real Estate Company                   1,674,086            6,000             1,680,086
</TABLE>



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