NHP INC
8-K, 1997-04-24
REAL ESTATE AGENTS & MANAGERS (FOR OTHERS)
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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


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



<TABLE>
<S>                                                                     <C>
Date of Report (Date of earliest event reported) April 16, 1997         Commission File Number 000-26572
</TABLE>
                                  
                                NHP INCORPORATED
                           (Exact name of registrant)


     Delaware                                        52-1445137
(State of organization)              (I.R.S. Employer Identification Number)


           8065 Leesburg Pike, Suite 400, Vienna, Virginia 22182-2738
              (Address of principal executive offices and zip code)

                                 (703) 394-2400
                         (Registrant's telephone Number)



================================================================================

                                  Page 1 of 4


<PAGE>   2



ITEM 1.  CHANGES IN CONTROL OF REGISTRANT

                  On April 16, 1997, Apartment Investment and Management
Company, a Maryland corporation ("AIMCO") entered into a Stock Purchase
Agreement with Demeter Holdings Corporation, a Massachusetts corporation
("Demeter") and Capricorn Investors, L.P., a Delaware limited partnership
("Capricorn"). Pursuant to and subject to the conditions set forth in the Stock
Purchase Agreement, AIMCO will acquire 5,619,695 shares of common stock, par
value $.01 per share ("NHP Stock") of NHP Incorporated (the "Registrant") from
Demeter and 1,310,427 shares of NHP Stock from Capricorn. Additional information
regarding the Stock Purchase Agreement is set forth in the Registrant's press
release included as Exhibit 99, which is incorporated herein by reference.

                  As of March 7, 1997, there were 12,652,439 shares of NHP Stock
issued and outstanding (excluding options). Upon purchase of shares pursuant to 
the Stock Purchase Agreement, AIMCO will be the beneficial owner of 6,930,122
shares of NHP Stock or approximately 54.8% of the NHP Stock issued and
outstanding. Upon the sale of a majority of the shares subject to the Stock
Purchase Agreement, Demeter and Capricorn will cause all of their
representatives who serve on the Registrant's board of directors or any of its
subsidiaries to resign from such boards. Pursuant to the Merger Agreement
described in Item 2 below, the Registrant is required to cause an individual
designated by AIMCO to fill such vacancies. After such resignations and the
appointment of AIMCO designees, representatives of AIMCO will constitute three
of the seven directors of the Registrant. The Merger Agreement prohibits AIMCO
from enlarging the size of the Registrant's board of directors or removing
any director who is a member of the Registrant's committee of independent
directors pending completion of the merger or termination of the Merger
Agreement.


ITEM 2.  ACQUISITION OR DISPOSITION OF ASSETS

                  On April 21, 1997, the Registrant entered into an Agreement
and Plan of Merger by and among AIMCO, AIMCO/NHP Acquisition Corp. (the "Merger
Sub") and the Registrant (the "Merger Agreement"), which is attached hereto as
Exhibit 2.1. Information regarding the Merger Agreement is set forth in Exhibit
99, which is incorporated herein by reference. In addition, the Registrant
believes that the distribution of both cash and shares of AIMCO common stock as
consideration as provided in the Merger Agreement will be treated as taxable
proceeds of the disposition of common stock of the Registrant for shareholders
of the Registrant.

                  The description of the Merger Agreement is not necessarily
complete. Reference is made to the copy of the Merger Agreement which is
attached hereto as Exhibit 2.1 and which is incorporated herein by reference.


ITEM 5.  OTHER EVENTS

                  On April 21, 1997, the Registrant, NHP Financial Services,
Ltd. ("NHP Financial")(a wholly-owned subsidiary of the Registrant) and The 
First National Bank of Boston entered into a Rights Agreement, pursuant to
which the Registrant will issue to its stockholders of record on May 2, 1997
and to persons who are issued shares thereafter, the right to receive a 
distribution of all of the common stock of NHP Financial (the "Rights") 
subject to certain conditions. The Registrant expects to distribute the Rights 
on May 9, 1997, but the Rights will not be transferable separately from 
shares of the Registrant.  Additional information regarding the Rights 
Agreement is set forth in Exhibit 99, which is incorporated herein by reference.

                  The Registrant expects to recognize capital gain for federal
income tax purposes as a result of the distribution of the Rights combined with
the later disposition of shares of NHP Financial at maturity of the Rights. The
amount of gain recognized by the Registrant will be the excess of the fair
market value of NHP Financial, on the date of the distribution of the Rights,
over the Registrant's tax basis in NHP Financial. The Registrant expects to have
regular federal income tax net operating losses available in a sufficient
amount to offset the gain under the regular federal income tax, but does not
expect to have sufficient alternative minimum tax net operating losses
available to offset the gain under the alternative minimum tax.

                  The distribution of the Rights is expected to be treated for
federal income tax purposes as a dividend to the Registrant's stockholders of 
record on May 2, 1997 to the extent of the current and accumulated earnings 
and profits of the Registrant.  The amount of the distribution is the fair 
market value of NHP Financial on the date of the distribution of the Rights. 
However, the Registrant may defer any determination of the fair market value 
of the Rights until after shares of NHP Financial are distributed pursuant to 
the Rights.  In any event, the portion of the distribution that will be 
treated as a dividend cannot be finally determined until the end of the 
Registrant's taxable year that includes the distribution of the Rights.  The 
portion of the distribution in excess of the amount treated as a dividend will 
be treated as a tax free return of basis to the extent of a Registrant 
stockholder's basis in the Registrant's common stock, and as a capital gain to 
the extent such portion exceeds the Registrant stockholder's basis in the 
Registrant's common stock.

                  A stockholder of the Registrant will have basis in the Rights
equal to the amount of the distribution. For the Registrant's stockholders, the
maturity of the Rights should not be a taxable event. A stockholder of the
Registrant will have basis in the shares of NHP Financial equal to such
stockholder's basis in the Rights prior to the maturity of the Rights.

                        



                                  Page 2 of 4
<PAGE>   3



                  The description of the Rights Agreement is not necessarily
complete. Reference is made to the copy of the Rights Agreement, which is
attached hereto as Exhibit 2.2 and which is incorporated herein by reference.


ITEM 7.  EXHIBITS

<TABLE>
<CAPTION>
                EXHIBIT NO.
                -----------

                  <S>      <C>
                  2.1      Agreement and Plan of Merger, dated as of April 21, 1997,
                           by and among Apartment Investment and Management Company, AIMCO/NHP 
                           Acquisition Corp. and NHP Incorporated.

                  2.2      Rights Agreement, dated as of April 21, 1997 by and between
                           NHP Incorporated, NHP Financial Services, Ltd. and The First
                           National Bank of Boston.

                  99       Press Release by NHP Incorporated,
                           dated April 21, 1997.
</TABLE>





                                  Page 3 of 4

<PAGE>   4



                                    SIGNATURE


                  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.


                                 NHP INCORPORATED



                                 BY: /s/ Joel F. Bonder
                                    ------------------------------------
                                    Joel F. Bonder
                                    Senior Vice President, Secretary
                                      and General Counsel


Dated:  April 22, 1997


                                  Page 4 of 4


<PAGE>   1



                          AGREEMENT AND PLAN OF MERGER

                           dated as of April 21, 1997

                                  by and among

                  APARTMENT INVESTMENT AND MANAGEMENT COMPANY,

                          AIMCO/NHP ACQUISITION CORP.

                                      and

                                NHP INCORPORATED


<PAGE>   2
                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                 PAGE
                                                                                                 ----
                                              ARTICLE I
                                             DEFINITIONS
<S>          <C>                                                                                   <C>
SECTION 1.1  Definitions............................................................................1

                                             ARTICLE II
                                             THE MERGER

SECTION 2.1  The Merger..........................................................................  10
SECTION 2.2  Effective Time of the Merger........................................................  11
SECTION 2.3  Closing.............................................................................  11
SECTION 2.4  Effects of the Merger...............................................................  11
SECTION 2.5  Certificate of Incorporation and By-Laws............................................  11
SECTION 2.6  Directors...........................................................................  11
SECTION 2.7  Officers............................................................................  12

                                             ARTICLE III
                                        CONVERSION OF SHARES

SECTION 3.1  Conversion of Capital Stock of
                      Merger Sub.................................................................  12
SECTION 3.2  Conversion of Capital Stock of NHP..................................................  12
SECTION 3.3  NHP Common Stock Elections; Exchange of Certificates................................. 14
SECTION 3.4  AIMCO Ownership Limit.................................................................16
SECTION 3.5  Dividends, Fractional Shares, Etc.....................................................16
SECTION 3.6  NHP Stock Options.....................................................................19

                                             ARTICLE IV
                                REPRESENTATIONS AND WARRANTIES OF NHP

SECTION 4.1  Organization and Qualifications; Subsidiaries........................................ 21
SECTION 4.2  Certificate of Incorporation and Bylaws.  ........................................... 22
SECTION 4.3  Capitalization....................................................................... 22
SECTION 4.4  Authority Relative to This Agreement................................................. 23
SECTION 4.5  No Conflict; Required Filings and Consents;
                      Certain Contracts........................................................... 23
SECTION 4.6  Compliance........................................................................... 24
SECTION 4.7  SEC Reports and Financial Statements................................................. 24
SECTION 4.8  Absence of Certain Changes or Events................................................. 25
</TABLE>


                                       i
<PAGE>   3
<TABLE>
<S>         <C>                                                                                    <C>
SECTION 4.9  Litigation........................................................................... 26
SECTION 4.10  Registration Statements and Proxy
                      Statement/Prospectus........................................................ 26
SECTION 4.11  Employee Benefit Plans.............................................................. 27
SECTION 4.12  Brokers............................................................................. 28
SECTION 4.13  Taxes............................................................................... 28
SECTION 4.14  Opinion of Financial Advisor........................................................ 29
SECTION 4.15  Reliance............................................................................ 29
SECTION 4.16  Management Arrangements..............................................................29
SECTION 4.17  Disclosure ..........................................................................30

                                              ARTICLE V
                               REPRESENTATIONS AND WARRANTIES OF AIMCO
                                           AND MERGER SUB

SECTION 5.1  Organization and Qualifications; Subsidiaries........................................ 30
SECTION 5.2  Charter and Bylaws................................................................... 30
SECTION 5.3  Capitalization....................................................................... 31
SECTION 5.4  Authority Relative to This Agreement................................................. 31
SECTION 5.5  No Conflict; Required Filings and Consents........................................... 32
SECTION 5.6  Compliance........................................................................... 33
SECTION 5.7  SEC Reports and Financial Statements................................................. 33
SECTION 5.8  Absence of Certain Changes or Events................................................. 34
SECTION 5.9  Litigation........................................................................... 34
SECTION 5.10  Registration Statements and Proxy Statement/
                      Prospectus.................................................................. 34
SECTION 5.11  Employee Benefit Plans...............................................................35
SECTION 5.12  Brokers............................................................................. 36
SECTION 5.13  Taxes............................................................................... 36
SECTION 5.14  REIT Status......................................................................... 37
SECTION 5.15  Reliance ............................................................................37
SECTION 5.16  Stock Purchase Agreement ............................................................38
SECTION 5.17  Financial Capability ................................................................38
SECTION 5.18  Qualified Purchaser .................................................................38
SECTION 5.19  Disclosure...........................................................................38

                                             ARTICLE VI
                                              COVENANTS

SECTION 6.1  Notification of Certain Matters...................................................... 38
SECTION 6.2  Further Action, Reasonable Efforts;
                      Consents and Approvals...................................................... 39
</TABLE>


                                       ii
<PAGE>   4
<TABLE>
<S>         <C>                                                                                    <C>
SECTION 6.3  Conduct of Business of NHP Pending
                      the Closing................................................................. 39
SECTION 6.4  Conduct of Business of AIMCO Pending
                      the Closing................................................................. 41
SECTION 6.5  Access to Information................................................................ 41
SECTION 6.6  No Solicitation...................................................................... 41
SECTION 6.7  Stockholder Meetings................................................................. 43
SECTION 6.8  Registration Statements and Joint Proxy Statement/
                      Prospectus.................................................................. 43
SECTION 6.9  Letters of Accountants............................................................... 45
SECTION 6.10  Accelerations....................................................................... 45
SECTION 6.11  Public Announcements................................................................ 45
SECTION 6.12  Blue Sky............................................................................ 46
SECTION 6.13  NYSE Listing........................................................................ 46
SECTION 6.14  Affiliates.......................................................................... 46
SECTION 6.15  Indemnification with Respect to the Registration/
                      Statement................................................................... 46
SECTION 6.16  Spin-Off............................................................................ 48
SECTION 6.17  Consent to Certain Transactions......................................................48
SECTION 6.18  Directors' and Officers' Indemnification and
                      Insurance ...................................................................49
SECTION 6.19  NHP Employees .......................................................................50
SECTION 6.20  Directors............................................................................50
SECTION 6.21  Financing ...........................................................................51
SECTION 6.22  Separation Agreement ................................................................52

                                             ARTICLE VII
                                      CONDITIONS TO THE MERGER

SECTION 7.1  Conditions to Each Party's Obligation to
                      Effect the Merger........................................................... 51
SECTION 7.2  Conditions to Obligations of NHP to
                      Effect the Merger........................................................... 52
SECTION 7.3  Conditions to Obligations of AIMCO and Merger
                      Sub to Effect the Merger.................................................... 53

                                            ARTICLE VIII
                             TERMINATION, WAIVER, AMENDMENT AND CLOSING

SECTION 8.1  Termination.......................................................................... 54
SECTION 8.2  Effect of Termination................................................................ 56
SECTION 8.3  Amendment or Supplement.............................................................. 56
</TABLE>


                                      iii
<PAGE>   5
<TABLE>
<S>         <C>                                                                                    <C>
SECTION 8.4  Extension of Time, Waiver, Etc....................................................... 57
SECTION 8.5  Termination Fee.......................................................................57

                                             ARTICLE IX
                                            MISCELLANEOUS

SECTION 9.1  Governing Law........................................................................ 58
SECTION 9.2  Entire Agreement..................................................................... 58
SECTION 9.3  Modification; Waiver................................................................. 58
SECTION 9.4  Notices.............................................................................. 58
SECTION 9.5  Expenses............................................................................. 60
SECTION 9.6  Assignment........................................................................... 60
SECTION 9.7  Survival............................................................................. 60
SECTION 9.8  Severability......................................................................... 60
SECTION 9.9  Successors and Assigns; Third Parties................................................ 61
SECTION 9.10  Counterparts........................................................................ 61
SECTION 9.11  Interpretation; References.......................................................... 61
SECTION 9.12  Jurisdiction ....................................................................... 61
SECTION 9.13  Exhibits and Schedules.............................................................. 62
SECTION 9.14  Attorneys' Fees..................................................................... 62
SECTION 9.15  Waiver of Jury Trial................................................................ 62
SECTION 9.16  Further Assurances.................................................................. 62
SECTION 9.17  Negotiation of Agreement............................................................ 62
</TABLE>




                                       iv
<PAGE>   6
                             DISCLOSURE SCHEDULE

Schedule 4.5 --  Conflicts
Schedule 4.6 --  Compliance
Schedule 4.8 --  Absence of Certain Changes or Events
Schedule 4.9 --  Litigation
Schedule 4.16 -- Management Arrangements
Schedule 6.3 --  Conduct of Business of NHP Pending the Closing
Schedule 6.18 -- Current Directors and Officers Liability Insurance Policies


                                   EXHIBITS

Exhibit A --   Rule 145 Affiliate Agreement
Exhibit B --   Registration Rights Agreement
Exhibit C-1 -- Form of Legal Opinion of Skadden, Arps, Slate, Meagher & Flom
               LLP, Counsel to AIMCO and Merger Sub
Exhibit C-2 -- Form of Legal Opinion of Piper & Marbury L.L.P., Maryland
               Counsel to AIMCO
Exhibit D-1 -- Form of Legal Opinion of Wilmer, Cutler & Pickering, Counsel
               to NHP
Exhibit D-2 -- Form of Legal Opinion of Arent Fox Kintner Plotkin & Kahn,
               Special Counsel to NHP


                                       v
<PAGE>   7
                          AGREEMENT AND PLAN OF MERGER


                  AGREEMENT AND PLAN OF MERGER, dated as of April 21, 1997 (the
"Agreement"), by and among APARTMENT INVESTMENT AND MANAGEMENT COMPANY, a
Maryland corporation ("AIMCO"), AIMCO/NHP ACQUISITION CORP., a Delaware
corporation and a wholly owned subsidiary of AIMCO ("Merger Sub"), and NHP
INCORPORATED, a Delaware corporation ("NHP").

                  WHEREAS, the Boards of Directors of AIMCO, Merger Sub and NHP
have determined that the merger of Merger Sub with and into NHP on the terms
set forth herein (the "Merger"), with NHP surviving as a wholly owned sub-
sidiary of AIMCO, is advisable and in the best interests of their respective
corporations and stockholders and have approved this Agreement.

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


                                   ARTICLE I

                                  DEFINITIONS

                  SECTION 1.1 Definitions.  The capitalized terms used in this
Agreement and not otherwise defined shall have the following meanings (unless
the context otherwise requires, such capitalized terms shall include the
singular and plural and the conjunctive and disjunctive forms of the terms
defined):

                  "AIMCO Common Stock" shall mean Class A Common Stock, par
value $.01 per share, of AIMCO.

                  "AIMCO Confidentiality Agreement" shall mean the letter
agreement, dated January 15, 1997, from AIMCO to NHP.

                  "AIMCO Meeting" shall have the meaning set forth in Section
6.7.



<PAGE>   8
                  "AIMCO Option Plans" shall have the meaning set forth in
Section 5.3.

                  "AIMCO Registration Statement" shall have the meaning set
forth in Section 6.8.

                  "AIMCO SEC Reports" shall have the meaning set forth in
Section 5.7.

                  "AIMCO Stock Issuance" shall have the meaning set forth in
Section 5.4.

                  "AIMCO Stockholder Approval" shall have the meaning set forth
in Section 5.4.

                  "Acquisition Proposal" shall have the meaning set forth in
Section 6.6.

                  "Benefit Plan" shall mean, with respect to any Person, any
plan, program, arrangement, practice or contract which provides benefits or
compensation to or on behalf of employees, former employees, consultants,
officers or directors of such Person or any of such Person's subsidiaries,
including, without limitation, any employee pension benefit plan (whether or
not insured), as defined in Section 3(2) of ERISA, any  employee welfare
benefit plan (whether or not insured), as defined in Section 3(1) of ERISA, any
stock bonus, stock ownership, stock option, stock purchase, stock appreciation
right, phantom stock, or other stock plan (whether qualified or non-qualified),
and any pension, welfare, termination, employment, severance, retirement,
bonus, deferred compensation, incentive compensation, insurance (whether life,
accident and health, or other and whether key man, group, workers compensation,
or other), profit sharing, disability, thrift, day care, legal services, leave
of absence, layoff, or supplemental or excess benefit plan, and any other
benefit contract, arrangement, or procedure having the effect of a plan,
whether formal, informal, written or oral, that is (or was at any time)
sponsored maintained or contributed to by such Person or by any trade or
business (whether or not incorporated) which, together with such Person, would
be deemed a "single employer" within the meaning of Section 4001 of ERISA,
within the last six years.

                  "Blue Sky Laws" shall have the meaning set forth in Section
4.5.



                                       2
<PAGE>   9
                  "Business Day" shall mean any day other than a Saturday, a
Sunday or a day on which banking institutions in New York City are not required
to be open.

                  "Capricorn" shall mean Capricorn Investors, L.P., a Delaware
limited partnership.

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

                  "Certificates" shall have the meaning set forth in Section
3.2.

                  "Claim" shall have the meaning set forth in Section 6.18.

                  "Class B Common Stock" shall have the meaning set forth in
Section 5.3.

                  "Closing" shall have the meaning set forth in Section 2.3.

                  "Closing Date" shall have the meaning set forth in Section
2.3.

                  "COBRA" shall have the meaning set forth in Section 4.11.

                  "Code" shall mean the Internal Revenue Code of 1986, as
amended.

                  "Consents" shall have the meaning set forth in Section 6.2.

                  "Contract" shall mean, with respect to any Person, any note,
bond, indenture, lease, license, permit, franchise, deed of trust, mortgage,
loan agreement or other document, instrument, obligation or agreement, oral or
written, to which such Person or any of its subsidiaries is a party or by which
any of them or their assets or properties is bound or affected.

                  "Demeter" shall mean Demeter Holdings Corporation, a
Massachusetts corporation.

                  "DGCL" means the General Corporation Law of the State of
Delaware.

                  "Dissenting Shares" shall have the meaning set forth in
Section 3.2.


                                       3
<PAGE>   10

                  "DLJ" shall have the meaning set forth in Section 4.12.

                  "Effective Time" shall have the meaning set forth in Section
2.2.

                  "Election Deadline" shall have the meaning set forth in
Section 3.3.

                  "Election Form" shall have the meaning set forth in Section
3.3.

                  "ERISA" shall mean the Employee Retirement Income Security
Act of 1974, as amended (including without limitation any successor act), and
the rules and regulations promulgated thereunder.

                  "Excess Shares" shall have the meaning set forth in Section
3.4.

                  "Exchange Act" shall mean the Securities Exchange Act of
1934, as amended.

                  "Exchange Agent" shall have the meaning set forth in Section
3.3.

                  "Exchange Ratio" shall have the meaning set forth in Section
3.2.

                  "Fairness Opinion" shall have the meaning set forth in
Section 4.14.

                  "GAAP" shall mean generally accepted accounting principles,
consistently applied throughout the specified period and in the immediately
prior comparable period.

                  "Governmental Authority" shall mean any government or any
agency, bureau, board, commission, court, judicial or quasijudicial body,
department, authority, official, political subdivision, tribunal or other
instrumentality of any government, whether Federal, state or local, domestic or
foreign.

                  "IRS" shall mean the United States Internal Revenue Service
or any successor agency.

                  "Indemnified Officers/Directors" shall have the meaning set
forth in Section 6.18.

                  "Indemnified Party" shall have the meaning set forth in
Section 6.15.



                                       4
<PAGE>   11
                  "Indemnifying Party" shall have the meaning set forth in
Section 6.15.

                  "Independent Committee" shall mean NHP's committee of
independent directors, comprised of Messrs. Bodman, Creighton and Cutler,
established by resolutions adopted by the NHP Board of Directors as of
February 24, 1997.

                  "Law" shall mean any law, statute, rule, regulation,
ordinance, decree or order of any Governmental Authority.

                  "Letter Agreement" shall mean that certain letter agreement,
dated February 13, 1997, among AIMCO, Demeter, Phemus and Capricorn.

                  "Lien" shall mean any mortgage, pledge, assessment, security
interest, lease, sublease, lien, adverse claim, levy, charge, option, right of
others or restriction (whether on voting, sale, transfer, disposition or
otherwise) or other encumbrance of any kind, whether imposed by agreement,
understanding, law or equity, or any conditional sale contract, title retention
contract or other contract to give or to refrain from giving any of the
foregoing.

                  "Losses" shall have the meaning set forth in Section 6.18.

                  "Material Adverse Effect" shall mean, with respect to any
Person, a material adverse effect on (i) the validity or enforceability of this
Agreement, (ii) the ability of such Person to perform its obligations under
this Agreement or (iii) the business, assets, condition or results of
operations of such Person and its subsidiaries, taken as a whole.

                  "Material Subsidiary" shall mean, with respect to any Person,
a subsidiary of such Person that (i) constitutes a "significant subsidiary" of
such Person, within the meaning of Rule 1-02 of Regulation S-X of the SEC, (ii)
has a direct or indirect ownership interest in any other subsidiary of such
Person that is a Material Subsidiary of such Person, or (iii) is otherwise
material to the business or operations of such Person and its subsidiaries,
taken as a whole.

                  "Maturity Time" shall have the meaning set forth in the
Rights Agreement.

                  "Maximum Premium" shall have the meaning set forth in Section
6.18.



                                       5
<PAGE>   12
                  "Merger Consideration" shall mean the Stock Consideration or
the Mixed Consideration.

                  "Merger Filing" shall have the meaning set forth in Section
2.2.

                  "Mixed Consideration" shall have the meaning set forth in
Section 3.2.

                  "Mixed Election" shall have the meaning set forth in Section
3.2.

                  "Mortgage Subsidiary" shall mean NHP Financial Services,
Ltd., a Delaware corporation.

                  "Mortgage Sub Stock" shall mean common stock, par value $.01
per share, of the Mortgage Subsidiary.

                  "MS Registration Statement" shall have the meaning set forth
in Section 6.8.

                  "NHP Common Stock" shall mean the common stock, par value,
$.01 per share, of NHP.

                  "NHP Confidentiality Agreement" shall mean the letter
agreement, dated January 15, 1997, from NHP to AIMCO.

                  "NHP Meeting" shall have the meaning set forth in Section
6.7.

                  "NHP Option Plans" shall have the meaning set forth in
Section 4.3.

                  "NHP SEC Reports" shall have the meaning set forth in Section
4.7.

                  "NHP Stock Options" shall have the meaning set forth in
Section 4.3.

                  "NHP Stockholder Approval" shall have the meaning set forth
in Section 6.7.

                  "NHP's Free Cash Flow" shall mean, for any period, the amount
of NHP's earnings before interest, taxes, depreciation and amortization for
such period, less (i) the amount of cash payments made or obligated to be made
in respect of


                                       6
<PAGE>   13
taxes and interest during such period, and (ii) $500,000 for each month (or
ratable portion thereof) included in such period.

                  "NHP's Transaction Costs" shall mean, for any period, all of
NHP's termination, severance and transaction costs arising during such period
in respect of the Spin-Off and the Merger.

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

                  "Notices" shall have the meaning set forth in Section 9.4.

                  "Option" shall mean, with respect to any Person, any option,
warrant, call, right, subscription, convertible or exchangeable security or
other right, agreement, arrangement or commitment of any kind or character to
which such Person or any of its subsidiaries is a party relating to the issued
or unissued capital stock of such Person or any of its subsidiaries, or
obligating such Person or any of its subsidiaries to issue, transfer, grant or
sell any shares of capital stock of, or other equity interest in, or securities
convertible into or exchangeable for any capital stock or other equity interest
in, such Person or any of its subsidiaries.

                  "Organizational Documents" shall mean (i) with respect to a
corporation, its certificate or articles of incorporation and bylaws, (ii) with
respect to any limited liability company, its certificate of formation,
articles of organization, regulations, operating agreement and limited
liability company agreement, as applicable, (iii) with respect to any limited
partnership, its certificate of limited partnership and limited partnership
agreement, (iv) with respect to any general partnership, its partnership
agreement, and (v) all other similar organizational documents.

                  "Outside Date" shall have the meaning set forth in Section
7.1.

                  "Person" shall mean any natural person, corporation, general
partnership, limited partnership, limited liability company, limited liability
partnership, proprietorship, trust, union, association, court, tribunal,
agency, government, department, commission, self-regulatory organization,
arbitrator, board, bureau, instrumentality or other entity, enterprise,
authority or business organization.

                  "Phemus" shall mean Phemus Corporation, a Massachusetts
corporation.



                                       7
<PAGE>   14
                  "Preferred Stock" shall have the meaning set forth in Section
5.3.

                  "Proxy Statement/Prospectus" shall have the meaning set forth
in Section 6.8.

                  "Registration Rights Agreement" shall have the meaning set
forth in Section 6.14.

                  "Real Estate Acquisition Agreement" shall mean the Real
Estate Acquisition Agreement to be entered into by and among AIMCO, AIMCO
Properties, L.P., Demeter, Phemus, Capricorn and/or certain related entities on
terms substantially in accordance with the Letter Agreement, provided that
AIMCO and its affiliates may acquire, directly or indirectly, all of the real
property interests identified in the Letter Agreement for consideration
substantially equivalent to the values attributed to such interests in the
Letter Agreement.

                  "REIT Status" shall mean, with respect to any Person, (a) the
qualification of such Person as a real estate investment trust under Sections
856 through 860 of the Code, (b) the applicability to such Person and its
shareholders of the method of taxation provided for in Sections 857 et seq. of
the Code,  and (c) the qualification and taxation of such Person as a real
estate investment trust under analogous provisions of state and local law in
each state and jurisdiction in which such Person owns property, operates or
conducts business.

                  "Representatives" means, with respect to any Person, the
officers, directors, employees, auditors and other agents and representatives
of such Person.

                  "Right" shall have the meaning set forth in the Rights
Agreement.

                  "Right of First Refusal Agreement" shall mean the Right of
First Refusal Agreement, dated as of August 18, 1995, by and among NHP, NHP
Partners, Inc., The National Housing Partnership, Demeter Holdings Corporation,
NHP Partners Limited Partnership, NHP Partners Two Limited Partnership, NHP
Partners LLC, NHP Partners Two LLC, Capricorn Investors, L.P., and J. Roderick
Heller, III.

                  "Rights Agreement" shall mean the Rights Agreement, dated as
of April 21, 1997, by and between NHP, the Mortgage Subsidiary and The First
National Bank of Boston, as Rights Agent.



                                       8
<PAGE>   15
                  "Rights Consideration" shall have the meaning set forth in
Section 3.2.

                  "Rule 145 Affiliate Agreement" shall have the meaning set
forth in Section 6.14.

                  "Rule 145 Affiliates" shall have the meaning set forth in
Section 6.14.

                  "SEC" shall mean the Securities and Exchange Commission.

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

                  "Senior Preferred Stock" shall have the meaning set forth in
Section 5.3.

                  "Spin-Off" shall mean the distribution of Rights and Mortgage
Sub Stock pursuant to the Rights Agreement.

                  "Stock and Asset Transfer Restrictions Agreement" shall mean
the Stock and Asset Transfer Restrictions Agreement, dated as of December 10,
1993, by and among Oxford Holding Corporation, Oxford Management Company, Inc.,
Oxford Retirement Services, Inc., Oxford Realty Services Corp., Oxford Develop-
ment Corporation, NHP-HG, Inc., NHP, Inc., NHP Property Management, Inc.,
Oxford Asset Management Corporation and Leo E. Zickler.

                  "Stock Purchase Agreement" shall mean the Stock Purchase
Agreement, dated as of April 16, 1997, by and among AIMCO, Demeter, and
Capricorn.

                  "subsidiary" shall mean, with respect to any Person, (i) any
corporation with respect to which such Person, directly or indirectly through
one or more subsidiaries, (a) owns more than 50% of the outstanding shares of
capital stock having generally the right to vote in the election of directors
or (b) has the power, under ordinary circumstances, to elect, or to direct the
election of, a majority of the board of directors of such corporation, (ii) any
partnership with respect to which (a) such Person or a subsidiary of such
Person is a general partner, (b) such Person and its subsidiaries together own
more than 50% of the interests therein, or (c) such Person and its subsidiaries
have the right to appoint or elect or direct the appointment or election of a
majority of the directors or other Person or body responsible for the
governance or management thereof, (iii) any limited liability company with


                                       9
<PAGE>   16
respect to which (a) such Person or a subsidiary of such Person is the manager
or managing member, (b) such Person and its subsidiaries together own more than
50% of the interests therein, or (c) such Person and its subsidiaries have the
right to appoint or elect or direct the appointment or election of a majority
of the directors or other Person or body responsible for the governance or
management thereof, or (iv) any other entity in which such Person has, and/or
one or more of its subsidiaries have, directly or indirectly, (a) at least a
50% ownership interest or (b) the power to appoint or elect or direct the
appointment or election of a majority of the directors or other Person or body
responsible for the governance or management thereof.

                  "Suit" shall have the meaning set forth in Section 9.12.

                  "Surviving Corporation" shall have the meaning set forth in
Section 2.1.

                  "Tax" or "Taxes" shall mean all Federal, state, local and
foreign taxes and other  assessments and governmental charges of a similar
nature (whether imposed directly or through withholdings), including any
interest, penalties and additions to Tax applicable thereto.

                  "Tax Returns" shall mean all Federal, state, local and
foreign returns, declarations, statements, reports, schedules, forms and
information returns relating to Taxes, and all amendments thereto.

                  "Transactions" means the transactions contemplated by this
Agreement in Article II.

                  "Triggering Event" shall have the meaning set forth in
Section 6.10.

                  "WARN Act" shall have the meaning set forth in Section 6.19.


                                   ARTICLE II

                                   THE MERGER

                  SECTION 2.1  The Merger.  Upon the terms and subject to the
conditions of this Agreement, at the Effective Time, in accordance with the
DGCL, Merger Sub shall be merged with and into NHP in accordance with this
Agreement and the separate existence of Merger Sub shall cease.  NHP shall be
the surviving


                                       10
<PAGE>   17
corporation in the Merger (hereinafter sometimes referred to as the "Surviving
Corporation").

                  SECTION 2.2  Effective Time of the Merger.  Upon the terms
and subject to the conditions hereof, a certificate of merger (the "Certificate
of Merger") shall be duly prepared, executed and acknowledged by the Surviving
Corporation and thereafter delivered to the Secretary of State of the State of
Delaware, for filing on the Closing Date (as defined in Section 2.3).  The
Merger shall become effective as of the date and at such time as the
Certificate of Merger pursuant to Section 251 of the DGCL and any other
documents necessary to effect the Merger in accordance with the DGCL are duly
filed (the "Merger Filing") with the Secretary of State of the State of
Delaware or at such subsequent date or time as shall be agreed by AIMCO and NHP
and specified in the Certificate of Merger (the time the Merger becomes
effective pursuant to the DGCL being referred to herein as the "Effective
Time").

                  SECTION 2.3  Closing.  Subject to the satisfaction or waiver
of all of the conditions to closing contained in Article VII, the closing of
the Merger (the "Closing") will take place at 10:00 a.m., New York City time,
on a date to be specified by the parties, which shall be no later than the
fifth Business Day (as defined below) after the satisfaction or waiver of the
conditions to Closing contained in Article VII, at the offices of Skadden,
Arps, Slate, Meagher & Flom LLP, 919 Third Avenue, New York, New York 10022,
unless another date, time or place is agreed to in writing by the parties
hereto.  The date and time at which the Closing occurs is referred to herein as
the "Closing Date."

                  SECTION 2.4  Effects of the Merger.  The Merger shall have
the effects set forth in the DGCL.  Without limiting the generality of the
foregoing, and subject thereto, at the Effective Time, all the properties,
rights, privileges, powers and franchises of NHP and Merger Sub shall vest in
the Surviving Corporation, and all debts, liabilities and duties of NHP and
Merger Sub shall become the debts, liabilities and duties of the Surviving
Corporation.

                  SECTION 2.5  Certificate of Incorporation and By-Laws.  The
Certificate of Incorporation of Merger Sub in effect immediately prior to the
Effective Time shall be the Certificate of Incorporation of the Surviving
Corporation until amended in accordance with the terms thereof and with
applicable law.  The By-Laws of Merger Sub in effect immediately prior to the
Effective Time shall be the By-Laws of the Surviving Corporation until amended
in accordance with the terms thereof and with applicable law.


                                       11
<PAGE>   18

                  SECTION 2.6  Directors.  The directors of Merger Sub
immediately prior to the Effective Time shall be the initial directors of the
Surviving Corporation, each to hold office from the Effective Time in
accordance with the Certificate of Incorporation and By-Laws of the Surviving
Corporation and until his or her successor is duly elected and qualified.

                  SECTION 2.7  Officers.  The officers of NHP immediately prior
to the Effective Time shall be the initial officers of the Surviving
Corporation, each to hold office from the Effective Time in accordance with the
Certificate of Incorporation and By-Laws of the Surviving Corporation and
until his or her successor is duly appointed and qualified.


                                  ARTICLE III

                              CONVERSION OF SHARES

                  SECTION 3.1  Conversion of Capital Stock of Merger Sub.  At
the Effective Time, each issued and outstanding share of common stock, par
value $.01 per share, of Merger Sub shall be converted into and become one
fully paid and nonassessable share of common stock, par value $.01 per share,
of the Surviving Corporation.

                  SECTION 3.2  Conversion of Capital Stock of NHP.

                           (a)  Except as otherwise provided in Section 3.4,
and subject to Sections 3.2(c) and (d), at the Effective Time, each issued and
outstanding share of NHP Common Stock shall be converted into one of the
following:

                  (i)  for each such share of NHP Common Stock with respect to
which an election to receive a combination of AIMCO Common Stock and cash has
been effectively made and not revoked or lost, pursuant to Section 3.3 (the
"Mixed Election"), the right to receive 0.37383 shares of AIMCO Common Stock
and an amount in cash equal to $10.00 (together, the "Mixed Consideration"); or

                  (ii)  for each such share of NHP Common Stock (other than a
share with respect to which a Mixed Election was effectively made and not
revoked or lost), the right to receive 0.74766 (the "Exchange Ratio") shares of
AIMCO Common Stock (the "Stock Consideration").



                                       12
<PAGE>   19
                  As a result of the Merger and without any action on the part
of the holders thereof, at the Effective Time, all shares of NHP Common Stock
shall  no longer be outstanding and shall automatically be cancelled and
retired and shall cease to exist, and each holder of shares of NHP Common Stock
shall thereafter cease to have any rights with respect to such shares of NHP
Common Stock, except the right to receive, without interest, the Merger
Consideration and cash for fractional shares of AIMCO Common Stock in
accordance with Section 3.5 upon the surrender of a certificate that,
immediately prior to the Effective Time, represented an outstanding share or
shares of NHP Common Stock and a related Right or Rights (a "Certificate").

                           (b)  At the Effective Time, each issued and
outstanding Right shall, in accordance with its terms, be converted into the
right to receive one-third of a share of Mortgage Sub Stock (the "Rights
Consideration").  As a result of the Merger and without any action on the part
of the holders thereof, at the Effective Time, all Rights shall, in accordance
with their terms, no longer be outstanding and shall automatically be cancelled
and retired and shall cease to exist, and each holder of Rights shall
thereafter cease to have any rights with respect thereto, except the right to
receive, without interest, the Rights Consideration and cash for fractional
Rights in accordance with Section 3.5 upon the surrender of a Certificate.

                           (c)  Notwithstanding anything contained in this
Section 3.2 to the contrary, each share of NHP Common Stock issued and held in
NHP's treasury immediately prior to the Effective Time, and each share of NHP
Common Stock owned by AIMCO or Merger Sub immediately prior to the Effective
Time, shall, by virtue of the Merger, cease to be outstanding and shall be
cancelled and retired and shall cease to exist without payment of any
consideration therefor.

                           (d)  Notwithstanding anything in this Section 3.2 to
the contrary, shares of NHP Common Stock which are issued and outstanding
immediately prior to the Effective Time and which are held by a Person who has
not voted such shares in favor of the Merger and who has properly exercised his
rights of appraisal for such shares in the manner provided by the DGCL (the
"Dissenting Shares") shall not be converted into or be exchangeable for the
right to receive the Merger Consideration, unless and until such holder shall
have failed to perfect or shall have effectively withdrawn or lost his right to
appraisal and payment, as the case may be.  If such holder shall have so failed
to perfect or shall have effectively withdrawn or lost such right, his shares
shall thereupon be deemed to have been converted into and to have become
exchangeable for, at the Effective Time, the right to receive the Merger
Consideration, without any interest thereon.  NHP shall give


                                       13
<PAGE>   20
AIMCO prompt notice of any Dissenting Shares (and shall also give AIMCO prompt
notice of any withdrawals of such demands for appraisal rights) and AIMCO shall
have the right to direct all negotiations and proceedings with respect to any
such demands.  NHP shall not, except with the prior written consent of AIMCO,
voluntarily make any payment with respect to, or settle or offer to settle, any
such demand for appraisal rights.

                  SECTION 3.3  NHP Common Stock Elections; Exchange of
Certificates.

                           (a) Each Person who, at the Effective Time, is a
record holder of shares of NHP Common Stock (other than holders of shares of
NHP Common Stock to be cancelled as set forth in Section 3.2(c) or Dissenting
Shares) shall have the right to submit an Election Form specifying the number
of shares of NHP Common Stock that such Person desires to have converted into
the right to receive AIMCO Common Stock and cash pursuant to the Mixed
Election, and the number of shares of NHP Common Stock that such person desires
to have converted into the right to receive solely AIMCO Common Stock (a "Stock
Election").

                           (b)  Promptly after the Effective Time, AIMCO shall
deposit (or cause to be deposited) with a bank or trust company to be
designated by AIMCO and reasonably acceptable to NHP (the "Exchange Agent"),
for the benefit of the holders of shares of NHP Common Stock and Rights, for
exchange in accordance with this Article III, (i) cash in an amount sufficient
to pay the aggregate cash portion of the Merger Consideration, (ii)
certificates representing the aggregate number of shares of AIMCO Common Stock
that may be issued in respect of shares of NHP Common Stock in the Merger, and
(iii) certificates representing the aggregate number of shares of Mortgage Sub
Stock that may be delivered in respect of Rights in the Merger.  AIMCO Common
Stock into which NHP Common Stock shall be converted pursuant to the Merger
shall be deemed to have been issued at the Effective Time.  Promptly after the
Effective Time, AIMCO shall cause the Mortgage Subsidiary to deposit with the
Exchange Agent, for the benefit of the holders of Rights, cash in an amount
sufficient to pay the aggregate amount of cash payable in lieu of fractional
shares of Mortgage Sub Stock pursuant to Section 3.5.

                           (c)  As soon as reasonably practicable after the
Effective Time, AIMCO shall cause the Exchange Agent to mail to each holder of
record of NHP Common Stock and Rights immediately prior to the Effective Time
(excluding Dissenting Shares)  (i) a letter of transmittal (which shall specify
that delivery shall be effected, and risk of loss and title to the Certificates
shall pass, only upon


                                       14
<PAGE>   21
delivery of the Certificates to the Exchange Agent and shall be in such form
and have such other customary provisions as AIMCO may reasonably specify), (ii)
instructions for use in effecting the surrender of the Certificates in exchange
for the Merger Consideration and Rights Consideration with respect to the
shares of NHP Common Stock and Rights formerly represented thereby, and (iii) a
form (an "Election Form") pursuant to which a holder of shares of NHP Common
Stock may make a Mixed Election or a Stock Election.  As of the Election
Deadline, all holders of NHP Common Stock immediately prior to the Effective
Time that have not submitted to the Exchange Agent, or have properly revoked, a
properly completed Election Form, shall be deemed to have made a Stock
Election.

                           (d) A Mixed Election or a Stock Election (other than
a deemed Stock Election) with respect to any shares of NHP Common Stock shall
be effective only if the Exchange Agent shall have received no later than 5:00
p.m., New York City time (the "Election Deadline"), on a date to be mutually
agreed upon by NHP and AIMCO (which date shall not be later than the twentieth
Business Day after the Effective Time), (i) an Election Form properly completed
and executed (with the signature or signatures thereof guaranteed to the extent
required by the Election Form) by the holder thereof, accompanied by (ii)
either (x) the Certificate or Certificates representing such shares of NHP
Common Stock, in such form and with such endorsements, stock powers and
signature guarantees as may be required by such Election Form, or (y) an
appropriate guarantee of delivery of such Certificate from a member of any
registered national securities exchange or of the National Association of
Securities Dealers, Inc. or a commercial bank or trust company in the United
States, as may be required by such Election Form. Any holder of NHP Common
Stock immediately prior to the Effective Time who has made an election by
submitting an Election Form to the Exchange Agent may, at any time prior to the
Election Deadline, change his election by submitting a revised Election Form,
properly completed and signed that is received by the Exchange Agent prior to
the Election Deadline. Any holder of NHP Common Stock immediately prior to the
Effective Time who has made an election by submitting an Election Form to the
Exchange Agent may revoke his election and withdraw his Certificates deposited
with the Exchange Agent by written notice to the Exchange Agent received before
the close of business on the day prior to the Election Deadline.

                           (e)  Upon surrender of a Certificate for
cancellation to the Exchange Agent or to such other agent or agents as may be
appointed by AIMCO, together with the Letter of Transmittal, duly executed, and
such other documents as AIMCO or the Exchange Agent shall reasonably request,
the holder of such Certificate shall be entitled to receive promptly after
the Election Deadline in exchange


                                       15
<PAGE>   22
therefor, (i) a certified or bank cashier's check in an amount equal to the
cash, if any, which such holder has the right to receive pursuant to the
provisions of this Article III (including any cash in lieu of fractional shares
of AIMCO Common Stock pursuant to Section 3.5), (ii) a certificate representing
the number of shares of AIMCO Common Stock which such holder has the right to
receive pursuant to the provisions of this Article III, and (iii) a certificate
representing the number of shares of Mortgage Sub Stock which such holder has
the right to receive pursuant to the provisions of this Article III (in each
case, less the amount of any required withholding taxes), and the Certificate
so surrendered shall forthwith be cancelled.  Until surrendered as contemplated
by this Section 3.3(e), each Certificate shall be deemed at any time after the
Effective Time to represent only the right to receive the Merger Consideration
with respect to the shares of NHP Common Stock formerly represented thereby and
the Rights Consideration with respect to the Rights formerly represented
thereby.

                           (f)  AIMCO shall have the right to make reasonable
rules, not inconsistent with the terms of this Agreement, governing the
issuance and delivery of certificates for shares of AIMCO Common Stock into
which shares of NHP Common Stock are converted in the Merger, the issuance and
delivery of certificates for shares of Mortgage Sub Stock into which Rights are
converted in the Merger, and the payment of cash for shares of NHP Common Stock
converted into the right to receive cash in the Merger.

                  SECTION 3.4  AIMCO Ownership Limit.  Notwithstanding any
other provision of this Agreement to the contrary, AIMCO shall not be obligated
to issue shares of AIMCO Common Stock to any Person if such issuance would
result in a violation of the ownership limit (the "Ownership Limit") set forth
in AIMCO's Organizational Documents.  In lieu of issuing any shares (the
"Excess Shares") of AIMCO Common Stock that would result in any Person
receiving a number of shares of AIMCO Common Stock in excess of the Ownership
Limit, AIMCO shall pay to such Person cash in an amount equal to the number of
such Excess Shares multiplied by $26.75.

                  SECTION 3.5  Dividends, Fractional Shares, Etc.

                           (a)  Notwithstanding any other provisions of this
Agreement, no dividends or other distributions declared after the Effective
Time on AIMCO Common Stock or Mortgage Sub Stock shall be paid to the holder of
any unsurrendered Certificates until such Certificates are surrendered for
exchange as provided in this Article III.  Subject to the effect of applicable
laws, following the


                                       16
<PAGE>   23
surrender of any such Certificate, there shall be paid, without interest, to
the Person in whose name the certificates representing the shares of AIMCO
Common Stock into which the shares of NHP Common Stock formerly represented by
such Certificate were converted are registered, (i) at the time of such
surrender, the amount of all dividends and other distributions with a record
date after the Effective Time theretofore payable with respect to such whole
shares of AIMCO Common Stock and not paid, less the amount of any withholding
taxes which may be required thereon, and (ii) at the appropriate payment date,
the amount of dividends or other distributions with a record date after the
Effective Time but prior to surrender and a payment date subsequent to
surrender payable with respect to such whole shares of AIMCO Common Stock, less
the amount of any withholding taxes which may be required thereon.  Subject to
the effect of applicable laws, following the surrender of any such Certificate,
there shall be paid, without interest, to the Person in whose name the
certificates representing the shares of Mortgage Sub Stock into which the
Rights formerly represented by such Certificate were converted are registered,
(i) at the time of such surrender, the amount of all dividends and other
distributions with a record date after the Effective Time theretofore payable
with respect to such whole shares of Mortgage Sub Stock and not paid, less the
amount of any withholding taxes which may be required thereon, and (ii) at
the appropriate payment date, the amount of dividends or other distributions
with a record date after the Effective Time but prior to surrender and a
payment date subsequent to surrender payable with respect to such whole shares
of Mortgage Sub Stock, less the amount of any withholding taxes which may be
required thereon.

                           (b)  No fractional shares of AIMCO Common Stock or
Mortgage Sub Stock shall be issued in the Merger.  All fractional shares of
AIMCO Common Stock or Mortgage Sub Stock that a holder of shares of NHP Common
Stock or Rights would otherwise be entitled to receive as a result of the
Merger (or in accordance with the terms of the Rights) shall be aggregated and,
if a fractional share results from such aggregation, such holder shall be
entitled to receive, in lieu thereof, an amount in cash determined by
multiplying (i) the fraction of a share of AIMCO Common Stock or Mortgage Sub
Stock to which such holder would otherwise have been entitled by (ii) in the
case of AIMCO Common Stock, $26.75 and, in the case of Mortgage Sub Stock,
$9.15.  No interest will be paid or will accrue on any cash paid or payable in
lieu of any fractional shares of AIMCO Common Stock or Mortgage Sub Stock.

                           (c)  At and after the Effective Time, there shall be
no further registration of transfers of shares of NHP Common Stock or Rights.
If, after the Effective Time, Certificates are presented to the Surviving
Corporation, they shall


                                       17
<PAGE>   24
be cancelled and exchanged for the consideration provided for, and in
accordance with the procedures set forth, in this Article III.  Certificates
surrendered for exchange by any Person constituting an "affiliate" of NHP for
purposes of Rule 145(c) under the Securities Act shall not be exchanged until
AIMCO has received a written Rule 145 Affiliate Agreement from such Person as
provided in Section 6.14.

                           (d)  If any portion of the Merger Consideration or
Rights Consideration is to be paid to a Person other than the registered holder
of the shares of NHP Common Stock and Rights represented by the Certificate or
Certificates surrendered in exchange therefor, it shall be a condition to such
payment that the Certificate or Certificates so surrendered shall be properly
endorsed or otherwise be in proper form for transfer and that the Person
requesting such payment shall pay to the Exchange Agent any transfer or other
taxes required as a result of such payment to a Person other than the
registered holder of such Certificates or establish to the satisfaction of the
Exchange Agent that such tax has been paid or is not payable and, with respect
to the Rights, such other conditions as may be set forth in the Rights
Agreement.

                           (e)  Any portion of the Merger Consideration, Rights
Consideration or cash payable in lieu of fractional shares made available to
the Exchange Agent pursuant to this Article III that remains unclaimed by the
former holders of shares of NHP Common Stock or Rights one year after the
Effective Time shall be delivered (i) in the case of the Merger Consideration,
to AIMCO, and (ii) in the case of the Rights Consideration and cash payable in
lieu of fractional shares of Mortgage Sub Stock, to the Mortgage Subsidiary.
Any such holder who has not theretofore exchanged his Certificates for the
Merger Consideration and Rights Consideration in accordance with this Article
III shall thereafter look only (i) to AIMCO for payment of the applicable
Merger Consideration, cash in lieu of fractional shares and unpaid dividends
and distributions on the AIMCO Common Stock deliverable in respect thereof,
determined pursuant to this Agreement, in each case, without interest, and (ii)
to the Mortgage Subsidiary for payment of the applicable Rights Consideration,
cash in lieu of fractional shares and unpaid dividends and distributions on the
Mortgage Sub Stock deliverable in respect thereof, determined pursuant to this
Agreement and the Rights Agreement, in each case, without interest.  None of
AIMCO, NHP or the Surviving Corporation shall be liable to any former holder of
shares of NHP Common Stock for any amount paid to a public official pursuant to
any applicable abandoned property, escheat or similar laws.  Any amounts
remaining unclaimed by holders of shares of NHP Common Stock three years after
the Effective Time (or such earlier date immediately prior to


                                       18
<PAGE>   25
such time as such amounts would otherwise escheat to or become property of any
governmental entity) shall, to the extent permitted by applicable law, become
the property of AIMCO free and clear of any claims or interest of any person
previously entitled thereto.

                           (f)  In the event that any Certificate shall have
been lost, stolen or destroyed, upon the making of an affidavit of that fact by
the Person claiming such Certificate to be lost, stolen or destroyed and, if
required by AIMCO, the posting by such Person of a bond in such reasonable
amount as AIMCO may direct as indemnity against any claim that may be made
against it with respect to such Certificate, the Exchange Agent will issue in
exchange for such lost, stolen or destroyed Certificate the applicable Merger
Consideration and Rights Consideration, cash in lieu of fractional shares, and
unpaid dividends and distributions on shares of AIMCO Common Stock or Mortgage
Sub Stock deliverable in respect thereof pursuant to this Agreement.

                           (g)  If at any time during the period between the
date of this Agreement and the Effective Time, any change in the outstanding
shares of capital stock of AIMCO or the Mortgage Subsidiary shall occur,
including by reason of any reclassification, recapitalization, stock split or
combination, exchange or readjustment of shares, or any stock dividend
thereon with a record date during such period, the number of shares of AIMCO
Common Stock constituting all or part of the Merger Consideration or the number
of shares of Mortgage Sub Stock constituting all or part of the Rights
Consideration, as the case may be, shall be appropriately adjusted, and, in the
case of the Rights Consideration, in accordance with the terms of the Rights.

                  SECTION 3.6  NHP Stock Options.

                           (a)  Prior to the Effective Time, subject to the
prior written approval of AIMCO, in connection with the Spin-Off, NHP may issue
to the holders of NHP Stock Options then outstanding Options to purchase shares
of Mortgage Sub Stock and, in connection therewith, may reduce the exercise
price with respect to the NHP Stock Options.  At the Effective Time, each
outstanding NHP Stock Option granted prior to the date of this Agreement shall
immediately become fully vested and exercisable, if not fully vested and
exercisable at such time, and all NHP Stock Options shall be assumed by AIMCO
and adjusted in accordance with the terms thereof and this Agreement to be
exercisable to purchase shares of AIMCO Common Stock, as provided below.
Following the Effective Time, each NHP Stock Option shall continue to have, and
shall be subject to, the same terms and conditions set


                                       19
<PAGE>   26
forth in the NHP Option Plan pursuant to which such NHP Stock Option was
issued, or any agreement pursuant to which such NHP Stock Option was subject
immediately prior to the Effective Time, except as set forth in this Section
3.6 and except that (i) each such NHP Stock Option shall be exercisable for
that number of shares of AIMCO Common Stock equal to the product of (x) the
aggregate number of shares of NHP Common Stock for which such NHP Stock Option
was exercisable and (y) the Exchange Ratio, rounded, in the case of any NHP
Stock Options other than an "incentive stock option" (within the meaning of
section 422 of the Code), up, and, in the case of any incentive stock option,
down, to the nearest whole share, if necessary, and (ii) the exercise price
per share of such NHP Stock Option shall be equal to the aggregate exercise
price of such NHP Stock Option at the Effective Time divided by the number of
shares of AIMCO Common Stock for which such NHP Stock Option shall be
exercisable as determined in accordance with the preceding clause (i), rounded
up to the next highest cent, if necessary.

                           (b)  As of the Effective Time, AIMCO will enter into
an assumption agreement with respect to each NHP Stock Option, which shall
provide for AIMCO's assumption of the obligations of NHP under the NHP Option
Plan or other agreement under which such NHP Stock Option was granted.  Prior
to the Effective Time, NHP shall make such amendments, if any, to the NHP
Option Plans as shall be necessary to permit the assumption and adjustment
referred to in this Section 3.6; provided, however, that such amendments shall
be subject to approval by AIMCO (which approval will not be unreasonably
withheld).

                           (c)  It is the intention of the parties that, to the
extent that any NHP Stock Option constituted an incentive stock option
immediately prior to the Effective Time, such option continue to qualify as an
incentive stock option to the maximum extent permitted by Section 422 of the
Code, and that the assumption of the NHP Stock Options provided by this Section
3.6 satisfy the conditions of Section 424(a) of the Code.  AIMCO shall comply
with the terms of the NHP Option Plans and ensure, to the extent required by,
and subject to the provisions of, such NHP Option Plans, that the NHP Stock
Options that qualified as incentive stock options prior to the Effective Time
continue to qualify as incentive stock options after the Effective Time.  As
soon as practicable after the Effective Time, AIMCO shall deliver to the
participants in the NHP Option Plans notices setting forth the number of shares
and exercise price for such participant's options.

                           (d)  At or prior to the Effective Time, AIMCO shall
take all corporate action necessary to reserve for issuance a sufficient number
of shares of AIMCO Common Stock for delivery upon exercise of NHP Stock Options
under the


                                       20
<PAGE>   27
NHP Option Plans assumed in accordance with Section 3.6(b).  AIMCO shall
prepare and file, at its own expense, a registration statement on Form S-8 to
become effective as of the Effective Time with respect to the shares of AIMCO
Common Stock subject to NHP Stock Options and shall use commercially reasonable
efforts to maintain the effectiveness of such registration statement (and
maintain the current status of the prospectus or prospectuses contained
therein) for so long as such options remain outstanding.  With respect to those
individuals who subsequent to the Merger will be subject to the reporting
requirements under Section 16(a) of the Exchange Act, where applicable, AIMCO
shall administer the NHP Option Plans assumed pursuant to Section 3.6(b) in a
manner that complies with Rule 16b-3 promulgated under the Exchange Act, to the
extent the applicable NHP Option Plan complied with such rule prior to the
Merger.

                           (e)  AIMCO shall provide that, for a period of 90
days after the Effective Time,  each holder of NHP Stock Options that are not
"incentive stock options" (within the meaning of Section 422 of the Code) may,
in lieu of exercising any such NHP Stock Options, elect to receive for each
share of AIMCO Common Stock subject to such option a cash amount equal to the
excess of $26.75 over the per share exercise price of such NHP Stock Option (as
determined after giving effect to Section 3.6(a)(ii).  For a period of 90 days
after the Effective Time, AIMCO will take all actions necessary to provide that
each holder of NHP Stock Options that are incentive stock options, at his or
her election, may exercise his or her NHP Stock Option and immediately sell the
shares of AIMCO Common Stock received upon such exercise, back to AIMCO for
$26.75 per share in cash, such that the net effect is that the option holder
receives an amount in cash equal to the excess of $26.75 over the per share
exercise price of NHP Stock Options (as determined after giving effect to
Section 3.6(a)(ii).


                                   ARTICLE IV

                     REPRESENTATIONS AND WARRANTIES OF NHP

                  NHP hereby represents and warrants to AIMCO and Merger Sub
that:

                  SECTION 4.1  Organization and Qualifications; Subsidiaries.
NHP and each Material Subsidiary of NHP is a corporation, partnership or other
legal entity duly organized, validly existing and in good standing under the
laws of the jurisdiction of its incorporation or organization and has the
requisite power and authority and all necessary governmental approvals to own,
lease and operate its


                                       21
<PAGE>   28
properties and to carry on its business as it is now being conducted, except
where the failure to be so organized, existing or in good standing or to have
such power, authority and governmental approvals would not, individually or in
the aggregate, have a Material Adverse Effect on NHP.  Each of NHP and its
Material Subsidiaries is duly qualified or licensed as a foreign corporation or
partnership to transact business, and is in good standing, in each
jurisdiction where the character of the properties owned, leased or operated by
it or the nature of its business makes such qualification or licensing
necessary, except for such failures to be so qualified or licensed and in good
standing that would not, individually or in the aggregate, have a Material
Adverse Effect on NHP.

                  SECTION 4.2  Certificate of Incorporation and Bylaws.
Complete and correct copies of the certificate of incorporation and bylaws of
NHP, as amended to date, have been delivered to AIMCO under cover of a letter
dated April 4, 1997, from NHP's General Counsel.  Such Organizational Documents
are in full force and effect and have not been amended or modified in any
respect.  NHP is not in violation of any provision of its Organizational
Documents.  No Material Subsidiary of NHP is in violation of any provision of
its Organizational Documents, except for such violations that would not,
individually or in the aggregate, have a Material Adverse Effect on NHP.

                  SECTION 4.3  Capitalization.  The authorized capital stock of
NHP consists of 25,000,000 shares of NHP Common Stock.  As of March 7, 1997,
(a) 12,652,439 shares of NHP Common Stock were issued and outstanding, all of
which were validly issued, fully paid and nonassessable; and (b)(i) 1,270,750
shares of NHP Common Stock were reserved for issuance upon the exercise of
outstanding stock options granted pursuant to the 1990 Stock Option Plan of NHP
Incorporated, the 1995 Incentive Stock Option Plan of NHP Incorporated, the
stock option agreement, dated as of May 1, 1996, between NHP and William R.
Sullivan, and the stock option agreement, dated as of August 18, 1995, between
NHP and J.  Roderick Heller III (collectively, the "NHP Option Plans"), and
(ii) 398,250 shares of NHP Common Stock were reserved for issuance pursuant to
options available for grant under the NHP Option Plans.  Except as set forth
above, as of March 7, 1997, no shares of capital stock or other voting
securities of NHP were issued, reserved for issuance or outstanding and, since
such date, no shares of capital stock or other voting securities or options in
respect thereof have been issued except upon the exercise of options (the "NHP
Stock Options") issued under the NHP Option Plans outstanding on March 7, 1997.
Except for the NHP Stock Options, there are not now, and at the Closing there
will not be, any NHP Options.  All shares of NHP Common Stock subject to
issuance as aforesaid, upon issuance on the terms and


                                       22
<PAGE>   29
conditions specified in the instruments pursuant to which they are issuable,
will be duly authorized, validly issued, fully paid and nonassessable.  There
are no outstanding contractual obligations of NHP or any of its subsidiaries
to repurchase, redeem or otherwise acquire any shares of NHP Common Stock or
any other shares of capital stock of NHP or any of its subsidiaries, or make
any material investment (in the form of a loan, capital contribution or
otherwise) in any subsidiary of NHP or any other Person, other than a
wholly-owned subsidiary of NHP.  Each outstanding share of capital stock of
each Material Subsidiary of NHP is duly authorized, validly issued, fully paid
and nonassessable and each such share owned by NHP or any subsidiary of NHP
is owned free and clear of any Liens.

                  SECTION 4.4  Authority Relative to This Agreement.  NHP has
all necessary corporate power and authority to execute and deliver this
Agreement, to perform its obligations hereunder and, subject to the adoption of
this Agreement by the stockholders of NHP as contemplated herein, to consummate
the Transactions.  The execution and delivery of this Agreement by NHP, the
performance by NHP of its obligations hereunder and the consummation by NHP of
the Transactions have been duly and validly authorized by all necessary
corporate action and approved by the affirmative vote of a majority of the
entire Board of Directors of NHP and no other corporate proceedings on the part
of NHP are necessary to authorize this Agreement or to consummate the
Transactions (other than the NHP Stockholder Approval and the Merger Filing).
This Agreement has been duly and validly executed and delivered by NHP and,
assuming the due authorization, execution and delivery thereof by AIMCO and
Merger Sub, constitutes the legal, valid and binding obligation of NHP,
enforceable against NHP in accordance with its terms, except as enforcement may
be limited by bankruptcy, insolvency, reorganization, moratorium, fraudulent
transfer or other similar laws relating to creditors' rights generally and by
equitable principles to which the remedies of specific performance and
injunctive and similar forms of relief are subject.

                  SECTION 4.5  No Conflict; Required Filings and Consents;
Certain Contracts.

                           (a)  Except as set forth on Schedule 4.5, the
execution and delivery of this Agreement by NHP does not, and the performance
of its obligations under this Agreement and the consummation of the
Transactions by NHP will not, (i) conflict with, result in a breach of, cause a
dissolution or require the consent or approval of any Person under, or violate
any provision of, the Organizational Documents of NHP, (ii) require any
consent, approval, authorization or permit of, or filing with or notification
to, any Governmental Authority, except for (A) applicable


                                       23
<PAGE>   30
requirements of the Exchange Act, the Securities Act and state securities or
"blue sky" laws ("Blue Sky Laws"), and (B) the Merger Filing, (iii) subject to
the making of the filings and obtaining the approvals identified in clause
(ii), conflict with or violate any Law, judgment, order, writ, injunction or
decree applicable to NHP or by which any property or asset of NHP is bound or
affected, or (iv) conflict with or result in any breach of or constitute a
default (or an event which with notice or lapse of time or both would become a
default) under, result in the loss by NHP or modification in a manner adverse
to NHP of any right or benefit under, or give to others any right of
termination, amendment, acceleration, repurchase or repayment, increased
payments or cancellation of, or result in the creation of a Lien or other
encumbrance on any NHP Common Stock or any property or asset of NHP or any
subsidiary of NHP pursuant to, any Contract of NHP, except, in each case, such
as would not prevent or delay in any material respect consummation of the
Merger, or otherwise, individually or in the aggregate, prevent NHP from
performing its obligations under this Agreement in any material respect, and
would not, individually or in the aggregate, have a Material Adverse Effect on
NHP.

                           (b)  Except as set forth in the Contracts filed (or
incorporated by reference) as exhibits to NHP's Annual Report on Form 10-K for
the year ended December 31, 1996 or the other NHP SEC Reports filed thereafter,
there are no Contracts to which NHP or any subsidiary of NHP is a party or by
which NHP or any subsidiary of NHP or any asset of NHP or any subsidiary of NHP
is bound, which by its terms materially limits the ability of NHP or any
subsidiary of NHP or, after consummation of the Transactions, would by its
terms materially limit the ability of AIMCO or any of its affiliates, to engage
in any business in any area or for any period.

                  SECTION 4.6  Compliance. Except as set forth on Schedule 4.6,
neither NHP nor any subsidiary of NHP is in conflict with, or in default or
violation of, (a) any Law applicable to such Person or by which any property or
asset of such Person is bound or affected, or (b) any Contract to which NHP or
any subsidiary of NHP is a party or by which such Person or any property or
asset of such Person is bound or affected, except for any such conflicts,
defaults or violations that would not, individually or in the aggregate, have a
Material Adverse Effect on NHP.

                  SECTION 4.7  SEC Reports and Financial Statements.  Each
form, report, schedule, registration statement and definitive proxy statement
filed by NHP with the SEC since August 14, 1995 and prior to the date hereof
(as such documents have been amended prior to the date hereof, the "NHP SEC
Reports"), as of their respective dates, complied in all material respects with
the applicable requirements


                                       24
<PAGE>   31
of the Securities Act and the Exchange Act and the rules and regulations
thereunder.  None of the NHP SEC Reports, as of their respective dates,
contained or contains any untrue statement of a material fact or omits to state
a material fact required to be stated therein or necessary to make the
statements therein, in light of the circumstances under which they were made,
not misleading, except for such statements, if any, as have been modified or
superseded by subsequent filings prior to the date hereof.  NHP has made
available to AIMCO true, accurate and complete copies of all of the NHP SEC
Reports.  The consolidated financial statements of NHP and its subsidiaries
included in such reports comply as to form in all material respects with
applicable accounting requirements and with the published rules and regulations
of the SEC with respect thereto, have been prepared in accordance with GAAP
(except as may be indicated in the notes thereto or, in the case of the
unaudited interim financial statements, as permitted by Form 10-Q of the SEC)
and fairly present (subject, in the case of the unaudited interim financial
statements, to normal, yearend audit adjustments) the consolidated financial
position of NHP and its subsidiaries as at the dates thereof and the
consolidated results of their operations and cash flows for the periods then
ended.  Since December 31, 1996, neither NHP nor any of its subsidiaries has
incurred any liabilities or obligations (whether absolute, accrued, fixed,
contingent, liquidated, unliquidated or otherwise and whether due or to become
due) of any nature, except liabilities, obligations or contingencies (a) which
are reflected on the consolidated balance sheet of NHP and its subsidiaries as
at December 31, 1996 (including the notes thereto) or (b) which (i) were
incurred in the ordinary course of business after December 31, 1996 and
consistent with past practices, (ii) are disclosed in the NHP SEC Reports filed
after December 31, 1996, (iii) would not, individually or in the aggregate,
have a Material Adverse Effect on NHP, or (iv) were incurred by the Mortgage
Subsidiary or one of its wholly owned subsidiaries and with respect to which
neither NHP nor any of its other subsidiaries will have any liability or
obligation as of the Effective Time.  Since August 14, 1995, NHP has timely
filed with the SEC all forms, reports and other documents required to be filed
prior to the date hereof, and no subsidiary of NHP has filed, or been required
to file, any form, report or other document with the SEC, in each case,
pursuant to the Securities Act, the Exchange Act or the rules and regulations
thereunder.  Since December 31, 1996, there has been no change in any of the
significant accounting (including tax accounting) policies, practices or
procedures of NHP or any subsidiary of NHP.

                  SECTION 4.8  Absence of Certain Changes or Events.  Except as
contemplated by this Agreement or as disclosed in any NHP SEC Report or as set
forth on Schedule 4.8, since December 31, 1996, (a) NHP and its subsidiaries
have conducted their respective businesses only in the ordinary course,
consistent with


                                       25
<PAGE>   32
past practice, and have not taken any of the actions set forth in paragraphs
(a) through (j) of Section 6.3, and (b) there has not occurred or arisen any
event that, individually or in the aggregate, has had or, insofar as reasonably
can be foreseen, is likely in the future to have, a Material Adverse Effect on
NHP other than events or developments generally affecting the industry in which
NHP operates.  The Rights Agreement is in full force and effect and has not
been amended, modified or terminated.

                  SECTION 4.9  Litigation.  Except as disclosed in the NHP SEC
Reports or as set forth on Schedule 4.9, there are no claims, suits, actions or
proceedings pending or, to NHP's knowledge, threatened or contemplated, nor are
there any investigations or reviews by any Governmental Authority pending or,
to NHP's knowledge, threatened or contemplated, against, relating to or
affecting NHP or any of its subsidiaries, which could reasonably be expected to
have, individually or in the aggregate, a Material Adverse Effect on NHP, or to
prohibit or materially restrict the consummation of the Transactions, nor is
there any judgment, decree, order, injunction, writ or rule of any Governmental
Authority or any arbitrator outstanding against NHP or any of its
subsidiaries having, or which, insofar as can be reasonably foreseen, in the
future is likely to have, a Material Adverse Effect on NHP.  In addition, there
have not been any developments with respect to any of the claims, suits,
actions, proceedings, investigations or reviews disclosed in the NHP SEC
Reports which, insofar as can be reasonably foreseen, in the future are likely
to have a Material Adverse Effect on NHP.

                  SECTION 4.10  Registration Statements and Proxy State-
ment/Prospectus.  The information supplied or to be supplied by NHP, any
subsidiary of NHP or their respective Representatives for inclusion in (a) the
AIMCO Registration Statement will not, either at the time the AIMCO
Registration Statement is filed with the SEC, at the time any amendment thereof
or supplement thereto is filed with the SEC, at the time it becomes effective
under the Securities Act or at the Effective Time, contain any untrue statement
of a material fact or omit to state any material fact required to be stated
therein or necessary to make the statements therein not misleading, (b) the MS
Registration Statement will not, either at the time the MS Registration
Statement is filed with the SEC, at the time any amendment thereof or
supplement thereto is filed with the SEC, at the time it becomes effective or
at the Effective Time, contain any untrue statement of a material fact or
omit to state any material fact required to be stated therein or necessary to
make the statements therein not misleading, and (c) the Proxy State-
ment/Prospectus, including any amendments and supplements thereto, will not, at
the date mailed to NHP's stockholders, at the time of the NHP Meeting, at the
date


                                       26
<PAGE>   33
mailed to AIMCO's stockholders or at the time of the AIMCO Meeting, contain any
untrue statement of a material fact or omit to state any material fact required
to be stated therein or necessary to make the statements therein, in light of
the circumstances under which they were made, not misleading.  The Proxy
Statement/Prospectus, as to information supplied by NHP, any subsidiary of
NHP or their respective Representatives, will comply in all material respects
with all applicable provisions of the Securities Act and the Exchange Act and
the rules and regulations promulgated thereunder, and the MS Registration
Statement will comply in all material respects with the provisions of
applicable Federal securities laws, rules and regulations.

                  SECTION 4.11  Employee Benefit Plans.  Each Benefit Plan of
NHP has been administered in compliance, in all material respects, with its
terms, and is in compliance in all material respects with applicable laws,
rules and regulations, (including, without limitation, provisions relating to
funding, filing, termination, reporting, disclosure and continuation coverage
obligations pursuant to Title V of the Consolidated Omnibus Budget
Reconciliation Act of 1985, as amended ("COBRA")).  No Benefit Plan of NHP has
been the subject of a "reportable event" (as defined in Section 4043 of ERISA)
(other than a reportable event for which the 30 day notice requirement has been
waived) and there have not been any non-exempt "prohibited transactions" (as
described in Section 4975 of the Code or in Part 4 of Subtitle B of Title I of
ERISA) with respect to any Benefit Plan of NHP.  There are no proceedings,
suits or material claims (other than routine claims for benefits) pending or,
to the knowledge of NHP, threatened with respect to any Benefit Plan of NHP,
the assets of any trust thereunder, or the Benefit Plan sponsor or the Benefit
Plan administrator with respect to the design or operation of any Benefit
Plan of NHP.  Each Benefit Plan of NHP which is intended to be "qualified"
within the meaning of Section 401(a) of the Code is so qualified, and any trust
created pursuant to any such Benefit Plan of NHP is exempt from Federal income
tax under Section 501(a) of the Code and the IRS has issued each such Benefit
Plan a favorable determination letter which is currently applicable. NHP is not
aware of any circumstance or event which would jeopardize the tax-qualified
status of any Benefit Plan of NHP or the tax-exempt status of any related
trust, or would cause the imposition of any material liability, penalty or tax
under ERISA or the Code with respect to any Benefit Plan of NHP.  No material
liabilities to or on behalf of participants (other than routine claims for
benefits), the IRS, the United States Department of Labor, the Pension Benefit
Guaranty Corporation or to any other Person or entity have been or are
reasonably expected to be incurred as a result of the termination of any
Benefit Plan of NHP or otherwise that have not been satisfied in full or
properly accrued on NHP's balance sheet as at December 31, 1996, included in
the NHP SEC Reports.


                                       27
<PAGE>   34
Except as set forth on Schedule 4.11, neither NHP nor any of its subsidiaries
maintains or is obligated to contribute to, or has ever maintained or been
obligated to contribute to, a "multi-employer plan" (as such term is defined by
Section 4001(a)(3) of ERISA) or a "multiple employer plan" (within the meaning
of Section 413(c) of the Code).  Except as set forth in Schedule 4.11 or in the
NHP SEC Reports or as otherwise required by applicable law, neither NHP nor any
of its subsidiaries maintains any retiree life and/or retiree health
insurance plans which provide for continuing benefits or coverage for any
employee or any beneficiary of an employee after such employee's termination of
employment.  Except as set forth in Schedule 4.11 or in the NHP SEC Reports,
the consummation of the transactions contemplated by this Agreement will not
(a) entitle any employee of NHP or its subsidiaries to severance pay,
unemployment compensation or any other payment, (b) accelerate the time of
payment or vesting, or increase the amount of compensation due to any such
employee or (c) result in any liability under Title IV of ERISA.

                  SECTION 4.12  Brokers.  No broker, finder or investment
banker is entitled to any brokerage, finder's or other fee or commission in
connection with the Transactions based on any arrangement or agreement made by
or on behalf of NHP, except Donaldson, Lufkin & Jenrette Securities Corporation
("DLJ").  NHP has heretofore furnished to AIMCO a complete and correct copy of
all agreements between NHP and DLJ pursuant to which such firm would be
entitled to any payment relating to the Transactions.

                  SECTION 4.13  Taxes.

                           (a)  Each of NHP and its subsidiaries has timely
filed (or has had timely filed on its behalf) or will file or cause to be
timely filed, all material Tax Returns required by applicable law to be filed
by it prior to or as of the Effective Time.  All such Tax Returns and
amendments thereto are, or will be before the Effective Time, true, complete
and correct in all material respects.

                           (b)  Each of NHP and its subsidiaries has paid (or
has had paid on its behalf), or where payment is not yet due, has established
(or has had established on its behalf and for its sole benefit and recourse),
or will establish or cause to be established on or before the Effective Time,
an adequate accrual for the payment of, all material Taxes due with respect to
any period ending prior to or as of the Effective Time.

                           (c)  No deficiency or adjustment for any material
Taxes has been proposed, asserted or assessed against NHP or any of its
subsidiaries that has


                                       28
<PAGE>   35
not been resolved or paid or for which an adequate accrual has not been
established in accordance with generally accepted accounting principles.  There
are no Liens for material Taxes upon the assets of NHP or any of its
subsidiaries, except Liens for current Taxes not yet due.

                           (d)  Neither NHP nor any of its subsidiaries has
entered into any Contract that would result in the disallowance of any tax
deductions pursuant to section 280G of the Code.  No "consent" within the
meaning of section 341(f) of the Code has been filed with respect to NHP or any
of its subsidiaries.

                           (e)  All Tax sharing agreements, Tax indemnity
agreements and similar agreements to which NHP or any of its subsidiaries is a
party are disclosed in the NHP SEC Reports, except for a Tax sharing agreement
reasonably acceptable to AIMCO that may be entered into between NHP and the
Mortgage Subsidiary after the date hereof.

                  SECTION 4.14  Opinion of Financial Advisor.  The Independent
Committee has received the opinion of DLJ, dated April 21, 1997 (the "Fairness
Opinion"), to the effect that, as of such date, the Merger Consideration and
the Rights Consideration are, in the aggregate, fair to the unaffiliated
stockholders of NHP, from a financial point of view, and a copy of the Fairness
Opinion has been delivered to AIMCO.

                  SECTION 4.15  Reliance.  In entering into this Agreement, NHP
has relied solely on representations made in this Agreement, including the
Schedules hereto, and any certificates and documents required to be provided by
AIMCO and the Merger Sub pursuant to this Agreement.  NHP has been represented
by counsel and has had unrestricted opportunity to examine and understand the
business and assets of AIMCO.

                  SECTION 4.16  Management Arrangements.  Except as set forth
on Schedule 4.16, and assuming that AIMCO satisfies the test for a "Qualified
Purchaser" under the Stock and Asset Transfer Restrictions Agreement, and
satisfies the net worth and managed units requirements of Section 4 of the
Stock and Asset Transfer Restrictions Agreement, there is currently no fact or
circumstance known to NHP that is likely to result in the loss by NHP, or
modification in a manner adverse to NHP, of any right or benefit under, or give
any Person any right of termination, cancellation or nonrenewal of, any
Contract pursuant to which NHP provides property management services, except
such as would not, individually or in the aggregate, have a Material Adverse
Effect on NHP.


                                       29
<PAGE>   36

                  SECTION 4.17  Disclosure.  No representation or warranty of
NHP contained in this Agreement and no statement contained in any certificate
or schedule furnished or to be furnished by or on behalf of NHP to AIMCO or any
of its Representatives pursuant hereto contains or will contain any untrue
statement of a material fact.


                                   ARTICLE V

                    REPRESENTATIONS AND WARRANTIES OF AIMCO
                                 AND MERGER SUB

                  AIMCO and Merger Sub hereby represent and warrant to NHP
that:

                  SECTION 5.1  Organization and Qualifications; Subsidiaries.
AIMCO, Merger Sub and each Material Subsidiary of AIMCO is a corporation,
partnership or other legal entity duly organized, validly existing and in good
standing under the laws of the jurisdiction of its incorporation or
organization and has the requisite power and authority and all necessary
governmental approvals to own, lease and operate its properties and to carry on
its business as it is now being conducted, except where the failure to be so
organized, existing or in good standing or to have such power, authority and
governmental approvals would not, individually or in the aggregate, have a
Material Adverse Effect on AIMCO.  Each of AIMCO, Merger Sub and AIMCO's
Material Subsidiaries is duly qualified or licensed as a foreign corporation,
partnership or limited liability company to transact business, and is in good
standing, in each jurisdiction where the character of the properties owned,
leased or operated by it or the nature of its business makes such qualification
or licensing necessary, except for such failures to be so qualified or
licensed and in good standing that would not, individually or in the aggregate,
have a Material Adverse Effect on AIMCO.

                  SECTION 5.2  Charter and Bylaws.  Complete and correct copies
of the charter and bylaws of AIMCO, as amended and supplemented to date, have
been filed (or incorporated by reference) as exhibits 3.1 and 3.2,
respectively, to AIMCO's Annual Report on Form 10-K for the year ended December
31, 1996.  Such Organizational Documents are in full force and effect and have
not been amended or modified in any respect.  AIMCO is not in violation of any
provision of its Organizational Documents.  No Material Subsidiary of AIMCO is
in violation of any provision of its Organizational Documents, except for such
violations that


                                       30
<PAGE>   37
would not, individually or in the aggregate, have a Material Adverse Effect on
AIMCO.

                  SECTION 5.3  Capitalization.  The authorized capital stock of
AIMCO consists of (a) 150,000,000 shares of AIMCO Common Stock; (b) 425,000
shares of Class B Common Stock, par value $.01 per share ("Class B Common
Stock"), of AIMCO; (c) 9,034,000 shares of Preferred Stock, par value $.01 per
share ("Preferred Stock"), of AIMCO; and (d) 966,000 shares of Cumulative
Convertible Senior Preferred Stock, par value $.01 per share (the "Senior
Preferred Stock"), of AIMCO.  As of March 11, 1997, (i) 17,569,970 shares of
AIMCO Common Stock were issued and outstanding, all of which were validly
issued, fully paid and nonassessable; (ii) 325,000 shares of Class B Common
Stock were issued and outstanding, all of which were validly issued, fully paid
and nonassessable; (iii) no shares of Preferred Stock or Senior Preferred Stock
were issued and outstanding; and (iv)(A) 560,659 shares of AIMCO Common Stock
were reserved for issuance upon the exercise of outstanding stock options
granted pursuant to The 1994 Stock Option Plan of Apartment Investment and
Management Company and Affiliates, the Apartment Investment and Management
Company 1996 Stock Award and Incentive Plan and the Apartment Investment and
Management Company NonQualified Employee Stock Option Plan (collectively, the
"AIMCO Option Plans"), (B) 174,792 shares of AIMCO Common Stock were reserved
for issuance pursuant to options available for grant under AIMCO Option Plans.
Except as set forth above, as of March 11, 1997, no shares of capital stock or
other voting securities of AIMCO were issued, reserved for issuance or
outstanding.  All shares of AIMCO Common Stock subject to issuance as
aforesaid, upon issuance on the terms and conditions specified in the
instruments pursuant to which they are issuable, will be duly authorized,
validly issued, fully paid and nonassessable.  There are no outstanding
contractual obligations of AIMCO or any of its subsidiaries to repurchase,
redeem or otherwise acquire any shares of AIMCO Common Stock or any other
shares of capital stock of AIMCO or any of its subsidiaries, or make any
material investment (in the form of a loan, capital contribution or otherwise)
in any subsidiary of AIMCO or any other Person, other than a wholly-owned
subsidiary of AIMCO.  Each outstanding share of capital stock of each Material
Subsidiary of AIMCO is duly authorized, validly issued, fully paid and
nonassessable and each such share owned by AIMCO or any subsidiary of AIMCO is
owned free and clear of any Liens.

                  SECTION 5.4  Authority Relative to This Agreement.  Each of
AIMCO and Merger Sub has all necessary corporate power and authority to execute
and deliver this Agreement, to perform its obligations hereunder and to
consummate


                                       31
<PAGE>   38
the Transactions, subject to the approval of the issuance of shares of AIMCO
Common Stock pursuant to the Merger (the "AIMCO Stock Issuance") by a majority
of votes cast by the holders of AIMCO Common Stock (the "AIMCO Stockholder
Approval").  The execution and delivery of this Agreement by AIMCO and Merger
Sub, the performance by AIMCO and Merger Sub of their respective obligations
hereunder and the consummation by AIMCO and Merger Sub of the Transactions have
been duly and validly authorized by all necessary corporate action and no other
corporate proceedings on the part of AIMCO or Merger Sub are necessary to
authorize this Agreement or to consummate the Transactions (other than the
AIMCO Stockholder Approval and the Merger Filing).  This Agreement has been
duly and validly executed and delivered by AIMCO and Merger Sub and, assuming
the due authorization, execution and delivery thereof by NHP, constitutes the
legal, valid and binding obligation of AIMCO and Merger Sub, enforceable
against AIMCO and Merger Sub in accordance with its terms, except as
enforcement may be limited by bankruptcy, insolvency, reorganization,
moratorium, fraudulent transfer or other similar laws relating to creditors'
rights generally and by equitable principles to which the remedies of specific
performance and injunctive and similar forms of relief are subject.

                  SECTION 5.5  No Conflict; Required Filings and Consents.  The
execution and delivery of this Agreement by AIMCO and Merger Sub do not, and
the performance of their respective obligations under this Agreement and the
consummation of the Transactions by AIMCO and Merger Sub will not, (a)
conflict with, result in a breach of, cause a dissolution or require the
consent or approval of any Person under, or violate any provision of, the
Organizational Documents of AIMCO or Merger Sub, (b) require any consent,
approval, authorization or permit of, or filing with or notification to, any
Governmental Authority, except for (i) applicable requirements, if any, of the
Exchange Act, the Securities Act or the Blue Sky Laws, and (ii) the Merger
Filing, (c) subject to the making of the filings and obtaining the approvals
identified in clause (b), conflict with or violate any Law, judgment, order,
writ, injunction or decree applicable to AIMCO or Merger Sub or by which any
property or asset of AIMCO or Merger Sub is bound or affected, or (d) conflict
with or result in any breach of or constitute a default (or an event which with
notice or lapse of time or both would become a default) under, result in the
loss by AIMCO or Merger Sub or modification in a manner adverse to AIMCO or
Merger Sub of any right or benefit under, or give to others any right of
termination, amendment, acceleration, repurchase or repayment, increased
payments or cancellation of, or result in the creation of a Lien or other
encumbrance on any Shares or any property or asset of AIMCO or Merger Sub or
any subsidiary of AIMCO or Merger Sub pursuant to, any Contract of AIMCO or
Merger Sub, except, in each


                                       32
<PAGE>   39
case, such as would not prevent or delay AIMCO or Merger Sub from performing
its obligations under this Agreement in any material respect, and would not,
individually or in the aggregate, have a Material Adverse Effect on AIMCO or
Merger Sub.

                  SECTION 5.6  Compliance.  Neither AIMCO, Merger Sub nor any
Material Subsidiary of AIMCO is in conflict with, or in default or violation
of, (a) any Law applicable to such Person or by which any property or asset of
such Person is bound or affected, or (b) any Contract to which AIMCO or Merger
Sub or any subsidiary of AIMCO is a party or by which such Person or any
property or asset of such Person is bound or affected, except for any such
conflicts, defaults or violations that would not, individually or in the
aggregate, have a Material Adverse Effect on AIMCO.

                  SECTION 5.7  SEC Reports and Financial Statements.  Each
form, report, schedule, registration statement and definitive proxy statement
filed by AIMCO with the SEC since June 30, 1995, and prior to the date hereof
(as such documents have been amended prior to the date hereof, the "AIMCO SEC
Reports"), as of their respective dates, complied in all material respects
with the applicable requirements of the Securities Act and the Exchange Act and
the rules and regulations thereunder.  None of the AIMCO SEC Reports, as of
their respective dates, contained or contains any untrue statement of a
material fact or omits to state a material fact required to be stated therein
or necessary to make the statements therein, in light of the circumstances
under which they were made, not misleading, except for such statements, if any,
as have been modified or superseded by subsequent filings prior to the date
hereof.  The consolidated financial statements of AIMCO and its subsidiaries
included in such reports comply as to form in all material respects with
applicable accounting requirements and with the published rules and regulations
of the SEC with respect thereto, have been prepared in accordance with
generally accepted accounting principles applied on a consistent basis
throughout the periods involved (except as may be indicated in the notes
thereto or, in the case of the unaudited interim financial statements, as
permitted by Form 10-Q of the SEC) and fairly present (subject, in the case of
the unaudited interim financial statements, to normal, year-end audit
adjustments) the consolidated financial position of AIMCO and its subsidiaries
as at the dates thereof and the consolidated results of their operations and
cash flows for the periods then ended.  Since December 31, 1996, neither AIMCO
nor any of its subsidiaries has incurred any liabilities or obligations
(whether absolute, accrued, fixed, contingent, liquidated, unliquidated or
otherwise and whether due or to become due) of any nature, except liabilities,
obligations or contingencies (a) which are reflected on the consolidated
balance sheet of AIMCO


                                       33
<PAGE>   40
and its subsidiaries as at December 31, 1996 (including the notes thereto) or
(b) which (i) were incurred in the ordinary course of business after December
31, 1996 and consistent with past practices, (ii) are disclosed in the AIMCO
SEC Reports filed after December 31, 1996, or (iii) would not, individually or
in the aggregate, have a Material Adverse Effect on AIMCO.  Since August 14,
1995, AIMCO has timely filed with the SEC all forms, reports and other
documents required to be filed prior to the date hereof, and no subsidiary of
AIMCO has filed, or been required to file, any form, report or other document
with the SEC, in each case, pursuant to the Securities Act, the Exchange Act or
the rules and regulations thereunder.  Since December 31, 1996, there has been
no change in any of the significant accounting (including tax accounting)
policies, practices or procedures of AIMCO or any subsidiary of AIMCO.

                  SECTION 5.8  Absence of Certain Changes or Events.  Except as
contemplated by this Agreement or as disclosed in any AIMCO SEC Report, since
December 31, 1996, (a) AIMCO and its subsidiaries have conducted their
respective businesses only in the ordinary course, consistent with past
practice, and (b) there has not occurred or arisen any event that, individually
or in the aggregate, has had or, insofar as reasonably can be foreseen, is
likely in the future to have, a Material Adverse Effect on AIMCO other than
events or developments generally affecting the industry in which AIMCO
operates.

                  SECTION 5.9  Litigation.  Except as disclosed in the AIMCO
SEC Reports, there are no claims, suits, actions or proceedings pending or, to
AIMCO's knowledge, threatened or contemplated, nor are there any investigations
or reviews by any Governmental Authority pending or, to AIMCO's knowledge,
threatened or contemplated, against, relating to or affecting AIMCO or any of
its subsidiaries, which could reasonably be expected to have, individually or
in the aggregate, a Material Adverse Effect on AIMCO, or to prohibit or
materially restrict the consummation of the Transactions, nor is there any
judgment, decree, order, injunction, writ or rule of any Governmental Authority
or any arbitrator outstanding against AIMCO or any of its subsidiaries having,
or which, insofar as can be reasonably foreseen, in the future is likely to
have, a Material Adverse Effect on AIMCO.  In addition, there have not been any
developments with respect to any of the claims, suits, actions, proceedings,
investigations or reviews disclosed in the AIMCO SEC Reports which, insofar as
can be reasonably foreseen, in the future are likely to have a Material Adverse
Effect on AIMCO.

                  SECTION 5.10  Registration Statements and Proxy State-
ment/Prospectus.  The information supplied or to be supplied by AIMCO, any


                                       34
<PAGE>   41
subsidiary of AIMCO or their respective Representatives for inclusion in (a)
the AIMCO Registration Statement will not, either at the time the AIMCO
Registration Statement is filed with the SEC, at the time any amendment thereof
or supplement thereto is filed with the SEC, at the time it becomes effective
under the Securities Act or at the Effective Time, contain any untrue statement
of a material fact or omit to state any material fact required to be stated
therein or necessary to make the statements therein not misleading, (b) the MS
Registration Statement will not, either at the time the MS Registration
Statement is filed with the SEC, at the time any amendment thereof or
supplement thereto is filed with the SEC, at the time it becomes effective or
at the Effective Time, contain any untrue statement of a material fact or
omit to state any material fact required to be stated therein or necessary to
make the statements therein not misleading, and (c) the Proxy State-
ment/Prospectus, including any amendments and supplements thereto, will not, at
the date mailed to AIMCO's stockholders, at the time of the AIMCO Meeting or at
the time of the NHP Meeting, contain any untrue statement of a material fact or
omit to state any material fact required to be stated therein or necessary to
make the statements therein, in light of the circumstances under which they
were made, not misleading.  The Proxy Statement/Prospectus, as to information
supplied by AIMCO, any subsidiary of AIMCO or their respective Representatives,
will comply as to form in all material respects with all applicable  provisions
of the Securities Act and the Exchange Act and the rules and regulations
promulgated thereunder, and the AIMCO Registration Statement will comply in all
material respects with the provisions of the Securities Act and the rules and
regulations promulgated thereunder.

                  SECTION 5.11  Employee Benefit Plans.  Each Benefit Plan of
AIMCO has been administered in compliance, in all material respects, with its
terms, and is in compliance in all material respects with applicable laws,
rules and regulations, (including, without limitation, provisions relating to
funding, filing, termination, reporting, disclosure and continuation coverage
obligations pursuant to Title V of COBRA.  No Benefit Plan of AIMCO has been
the subject of a "reportable event" (as defined in Section 4043 of ERISA)
(other than a reportable event for which the 30 day notice requirement has been
waived) and there have not been any non-exempt "prohibited transactions" (as
described in Section 4975 of the Code or in Part 4 of Subtitle B of Title I of
ERISA) with respect to any Benefit Plan of AIMCO.  There are no proceedings,
suits or material claims (other than routine claims for benefits) pending or,
to the knowledge of AIMCO, threatened with respect to any Benefit Plan of
AIMCO, the assets of any trust thereunder, or the Benefit Plan sponsor or the
Benefit Plan administrator with respect to the design or operation of any
Benefit Plan of AIMCO.  Each Benefit Plan of AIMCO which is


                                       35
<PAGE>   42
intended to be "qualified" within the meaning of Section 401(a) of the Code is
so qualified, and any trust created pursuant to any such Benefit Plan of AIMCO
is exempt from Federal income tax under Section 501(a) of the Code and the IRS
has issued each such Benefit Plan a favorable determination letter which is
currently applicable. AIMCO is not aware of any circumstance or event which
would jeopardize the tax-qualified status of any Benefit Plan of AIMCO or the
tax-exempt status of any related trust, or would cause the imposition of any
material liability, penalty or tax under ERISA or the Code with respect to any
Benefit Plan of AIMCO.  No material liabilities to or on behalf of participants
(other than routine claims for benefits), the IRS, the United States
Department of Labor, the Pension Benefit Guaranty Corporation or to any other
Person or entity have been or are reasonably expected to be incurred as a
result of the termination of any Benefit Plan of AIMCO or otherwise that have
not been satisfied in full or properly accrued on AIMCO's balance sheet as at
December 31, 1996, included in the AIMCO SEC Reports.  Neither AIMCO nor any of
its subsidiaries maintains or is obligated to contribute to, or has ever
maintained or been obligated to contribute to, a "multi-employer plan" (as such
term is defined by Section 4001(a)(3) of ERISA) or a "multiple employer plan"
(within the meaning of Section 413(c) of the Code).  Except as set forth in the
AIMCO SEC Reports or as otherwise required by applicable law, neither AIMCO nor
any of its subsidiaries maintains any retiree life and/or retiree health
insurance plans which provide for continuing benefits or coverage for any
employee or any beneficiary of an employee after such employee's termination of
employment.  Except as disclosed in the AIMCO SEC Reports, the consummation of
the transactions contemplated by this Agreement will not (a) entitle any
employee of AIMCO or its subsidiaries to severance pay, unemployment
compensation or any other payment, (b) accelerate the time of payment or
vesting, or increase the amount of compensation due to any such employee or (c)
result in any liability under Title IV of ERISA.

                  SECTION 5.12  Brokers.  No broker, finder or investment
banker is entitled to any brokerage, finder's or other fee or commission in
connection with the Transactions based on any arrangement or agreement made by
or on behalf of AIMCO.

                  SECTION 5.13  Taxes.

                           (a)  AIMCO and each of its subsidiaries has timely
filed (or has had timely filed on its behalf) or will file or cause to be
timely filed, all material Tax Returns required by applicable law to be filed
by it prior to or as of the


                                       36
<PAGE>   43
Effective Time.  All such Tax Returns and amendments thereto are, or will be
before the Effective Time, true, complete and correct in all material respects.

                           (b)  Each of AIMCO and its subsidiaries has paid (or
has had paid on its behalf), or where payment is not yet due, has established
(or has had established on its behalf and for its sole benefit and recourse),
or will establish or cause to be established on or before the Closing Date, an
adequate accrual for the payment of, all material Taxes due with respect to any
period ending prior to or as of the Closing Date.

                           (c)  No deficiency or adjustment for any material
Taxes has been proposed, asserted or assessed against AIMCO or any of its
subsidiaries that has not been resolved or paid or for which an adequate
accrual has not been established in accordance with generally accepted
accounting principles.  There are no Liens for material Taxes upon the assets
of AIMCO or any of its subsidiaries, except Liens for current Taxes not yet
due.

                           (d)  Neither AIMCO nor any of its subsidiaries has
entered into any Contract that would result in the disallowance of any tax
deductions pursuant to section 280G of the Code.  No "consent" within the
meaning of section 341(f) of the Code has been filed with respect to AIMCO or
any of its subsidiaries.

                           (e)  All Tax sharing agreements, Tax indemnity
agreements and similar agreements to which AIMCO or any of its subsidiaries is
a party are disclosed in the AIMCO SEC Reports.

                  SECTION 5.14  REIT Status.  AIMCO has been organized and
operated in conformity with the requirements for qualification as a real estate
investment trust under the Code for its taxable years ended December 31, 1994,
1995 and 1996, AIMCO's present and proposed method of operation will enable it
to continue to meet the requirements for qualification as a real estate
investment trust under the Code, and the consummation of the transactions
contemplated by this Agreement, the Stock Purchase Agreement and the Real
Estate Acquisition Agreement will not adversely affect AIMCO's ability to
continue to meet such requirements.

                  SECTION 5.15  Reliance.  In entering into this Agreement,
AIMCO has relied solely on representations made in this Agreement, including
the Schedules hereto, and any certificates and documents required to be
provided by NHP pursuant


                                       37
<PAGE>   44
to this Agreement.  AIMCO has been represented by counsel and has had
unrestricted opportunity to examine and understand the business and assets of
NHP.

                  SECTION 5.16  Stock Purchase Agreement.  AIMCO has delivered
to NHP a true and correct copy of the Stock Purchase Agreement.  The Stock
Purchase Agreement is a valid and binding obligation of AIMCO and, to AIMCO's
knowledge, Demeter, and Capricorn.

                  SECTION 5.17  Financial Capability.  AIMCO will have on the
Closing Date and immediately prior to and at the Effective Time, funds and
authorized and unissued shares of AIMCO Common Stock sufficient to consummate
the Merger and the transactions contemplated hereby.  To the extent that such
funds are to be provided by third party financing, AIMCO will provide NHP with
complete and correct copies of all documents relating to the provision of such
financing.

                  SECTION 5.18  Qualified Purchaser.  AIMCO is, and, after
giving effect to the Transactions and the transactions contemplated by the
Stock Purchase Agreement, will be, a "Qualified Purchaser," as such term is
defined in the Stock and Asset Transfer Restrictions Agreement.

                  SECTION 5.19  Disclosure.  No representation or warranty of
AIMCO contained in this Agreement and no statement contained in any certificate
or schedule furnished or to be furnished by or on behalf of AIMCO to NHP or any
of its Representatives pursuant hereto contains or will contain any untrue
statement of a material fact.


                                   ARTICLE VI

                                   COVENANTS

                  SECTION 6.1  Notification of Certain Matters.  Each of the
parties hereto shall give prompt notice to the other parties hereto of (a) the
occurrence or nonoccurrence of any event the occurrence or nonoccurrence of
which would be likely to cause (i) any representation or warranty contained in
this Agreement to be untrue or inaccurate in any material respect, or (ii) any
covenant, condition or agreement contained in this Agreement not to be complied
with or satisfied and (b) any failure of such party to comply with or satisfy
any covenant, condition or agreement to be complied with or satisfied by it
hereunder.  The delivery of any


                                       38
<PAGE>   45
notice pursuant to this Section 6.1 shall not limit or otherwise affect the
remedies available hereunder to the party receiving such notice.

                  SECTION 6.2  Further Action, Reasonable Efforts; Consents and
Approvals.  Upon the terms and subject to the conditions hereof, each of the
parties hereto shall use commercially reasonable efforts to take, or cause to
be taken, all appropriate action, and 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 hereby, including,
without limitation, using commercially reasonable efforts to obtain all
licenses, permits, consents, approvals, authorizations, certificates,
qualifications and orders of, and make all filings and required submissions
with, all Governmental Authorities, and all shareholders, lenders and partners
of, and parties to Contracts with, AIMCO, NHP or any other Person, in each
case, as are necessary or desirable for the consummation of the transactions
contemplated hereby (collectively "Consents").  NHP shall, as soon as possible
prior to the Closing, deliver to AIMCO copies of all Consents obtained by NHP.
AIMCO shall, as soon as possible prior to the Closing, deliver to NHP copies of
all Consents obtained by AIMCO.  In case at any time after the Closing Date any
further action is necessary or desirable to carry out the purposes of this
Agreement, AIMCO and NHP shall use commercially reasonable efforts to take all
such action.  Prior to the Closing, each party shall use its best efforts not
to take any action, or enter into any transaction, that would cause any of its
representations or warranties contained in this Agreement to be untrue.

                  SECTION 6.3  Conduct of Business of NHP Pending the Closing.
From the date hereof through the Closing, except as expressly permitted or
contemplated by this Agreement or as set forth on Schedule 6.3 hereto, unless
AIMCO shall otherwise agree in writing prior to the taking of any action
prohibited by the terms of this Section 6.3, NHP and its subsidiaries shall
conduct their operations and business in the ordinary and usual course of
business and consistent with past practice and use reasonable efforts to keep
available the services of its present officers and key employees and preserve
the goodwill and business relationships with all Persons having business
relationships with it.  Without limiting the generality of the foregoing, and
except as otherwise expressly permitted by this Agreement, prior to the
Closing, without the prior written consent of AIMCO, neither NHP nor any of its
subsidiaries shall:  (a) amend or modify its Organizational Documents or the
Rights Agreement; (b) issue, sell, pledge or dispose of, grant or otherwise
create, or agree to issue, sell, pledge or dispose of, grant or otherwise
create any capital stock or other equity securities, any debt or other
securities convertible into or exchangeable for any of its capital stock or
other equity securities; (c) purchase,


                                       39
<PAGE>   46
redeem or otherwise acquire or retire, or offer to purchase, redeem or
otherwise acquire or retire, any of its capital stock or other equity
securities (including any options with respect to any of its capital stock or
other equity securities and any securities convertible or exchangeable into any
of its capital stock or other equity securities) or any long-term debt; (d)
declare, set aside, make or pay any dividend or other distribution, payable in
cash, stock, property or otherwise, with respect to any of its capital stock or
other equity securities (except the Spin-Off and dividends declared and paid by
a subsidiary of NHP only to NHP or a wholly-owned subsidiary of NHP), or
subdivide, reclassify, recapitalize, split, combine or exchange any of its
capital stock or other equity securities; (e) incur or become contingently
liable with respect to any indebtedness or guarantee any such indebtedness or
issue any debt securities if, after giving effect thereto, the outstanding
indebtedness of NHP and its subsidiaries exceeds the sum of (i) the amount of
long-term indebtedness and the current portion of long-term indebtedness of NHP
and its subsidiaries at December 31, 1996, plus (ii) $5 million (excluding any
such indebtedness relating to the Mortgage Subsidiary and permitted by the
proviso at the end of this Section 6.3); (f) acquire or agree to acquire by
merging or consolidating with, or by purchasing a substantial equity interest
in or a substantial portion of the assets of, or by any other manner, any
business or any corporation, partnership, association or other business
entity; (g) mortgage or otherwise encumber or subject to any Lien, or sell,
transfer or otherwise dispose of, any assets or properties that are material,
individually or in the aggregate, to NHP and its subsidiaries, taken as a
whole, other than Liens incurred in the ordinary course of business consistent
with past practice or to secure indebtedness incurred in compliance with clause
(e), and sales and dispositions in the ordinary course of business consistent
with past practice; (h) except as may be required by applicable Law, or as
contemplated by this Agreement, (i) increase the compensation payable or to
become payable to, or enter into any employment agreement with, its executive
officers or employees, except with respect to non-executive officer employees
in the ordinary course of business consistent with past practice; (ii) grant
any severance or termination pay to any director, executive officer or employee
of NHP or any subsidiary of NHP, except with respect to non-executive officer
employees in the ordinary course of business or pursuant to existing NHP
Benefit Plans; or (iii) enter into any  severance agreement with any director,
executive officer or employee except with respect to non-executive officer
employees in the ordinary course of business; or (iv) establish, adopt, enter
into, terminate, withdraw from or amend in any material respect or take action
to accelerate any rights or benefits under any collective bargaining agreement,
any stock option plan, or any employee benefit plan or policy; (i) take any
action, other than reasonable actions in the ordinary course of business and
consistent with past practice, with respect to accounting policies or


                                       40
<PAGE>   47
procedures (including Tax accounting policies, procedures and elections
relating to Taxes that would apply to NHP, AIMCO or the Surviving Corporation
after the Merger), except as may be required by generally accepted accounting
principles, or settle any material Audit or, except as required by Law, amend
in any material respect any material Tax Return; or (j) authorize any of, or
commit or agree to take any of, the foregoing actions; provided, however, that
the Mortgage Subsidiary may acquire any assets, businesses or entities, and NHP
may incur indebtedness on behalf of the Mortgage Subsidiary, if, after giving
effect to the Spin-Off, NHP and its other subsidiaries would not have any
liabilities or obligations relating thereto.

                  SECTION 6.4  Conduct of Business of AIMCO Pending the
Closing.  From the date hereof through the Closing, except as expressly
permitted or contemplated by this Agreement, unless NHP shall otherwise agree
in writing prior to the taking of any action prohibited by the terms of this
Section 6.4, AIMCO and its subsidiaries shall conduct their operations and
business in the ordinary and usual course of business and consistent with past
practice and use reasonable efforts to keep available the services of its
present officers and key employees and preserve the goodwill and business
relationships with all Persons having business relationships with it.

                  SECTION 6.5  Access to Information.

                           (a) From the date hereof to the Effective Time, each
of AIMCO and NHP shall (and shall cause their respective subsidiaries and
Representatives to) afford the Representatives of the other party reasonable
access at all reasonable times to its officers, employees, agents, properties,
offices, plants and other facilities, books, records and Tax Returns, and shall
furnish such Representatives with all financial, operating and other data and
information as may be reasonably requested.

                           (b)  All information provided by AIMCO or NHP
pursuant to this Agreement shall be subject to the AIMCO Confidentiality
Agreement or the NHP Confidentiality Agreement, respectively.

                  SECTION 6.6  No Solicitation.

                           (a)  NHP shall not, nor shall it permit any of its
subsidiaries, or any of their Representatives (including, without limitation,
any investment banker, attorney or accountant retained by NHP or a subsidiary
of NHP), directly or indirectly, to, (i) initiate, solicit or encourage any
inquiries or proposals that


                                       41
<PAGE>   48
constitute, or could reasonably be expected to lead to, a proposal or offer for
a merger, consolidation, business combination, sale of assets representing a
substantial portion of the assets of NHP and its subsidiaries, taken as a
whole, sale of shares of capital stock (other than to NHP or a subsidiary of
NHP), including, without limitation, by way of a tender offer or exchange
offer by any person (other than NHP or a subsidiary of NHP) for shares of
capital stock of NHP, other than the Transactions (any of the foregoing
inquiries or proposals being referred to in this Agreement as an "Acquisition
Proposal"), (ii) engage in negotiations or discussions concerning, or provide
to any person or entity any non-public information or data relating to NHP or
any subsidiary of NHP for the purposes of, or otherwise cooperate with or
assist or participate in, facilitate or encourage, any inquiries or the making
of any Acquisition Proposal, (iii) agree to, approve or recommend any
Acquisition Proposal, or (iv) take any other action inconsistent with the
obligations and commitments assumed by NHP pursuant to this Section 6.6;
provided, however, that nothing contained in this Agreement shall prevent NHP
or its Board of Directors from (A) furnishing nonpublic information to, or
entering into discussions or negotiations with, any person or entity in
connection with an unsolicited bona fide written Acquisition Proposal to NHP or
its stockholders, if and only to the extent that (1) the Board of Directors of
NHP, by action of a majority of the entire Board of Directors of NHP, or by the
Board of Directors with the approval of its Independent Committee, determines
in good faith (after consultation with outside legal counsel) that such action
is necessary for such Board of Directors to comply with its fiduciary duties to
stockholders under applicable law, and (2) prior to furnishing such
non-public information to, or entering into discussions or negotiations with,
such person or entity, the Board of Directors of NHP receives from such person
or entity an executed confidentiality agreement with terms no less favorable to
such party than those contained in the NHP Confidentiality Agreement; or (B)
complying with Rule 14e-2 promulgated under the Exchange Act with regard to an
Acquisition Proposal or making any other public disclosure that, in the opinion
of NHP's counsel, is required by applicable law, rule or regulation; provided,
that prior to making any such other public disclosure NHP shall to the extent
reasonably practicable inform AIMCO that it intends to make such disclosure and
consult with AIMCO regarding the necessity for such disclosure.  NHP will
immediately cease and cause to be terminated any existing activities,
discussions or negotiations by NHP or its Representatives with any parties
conducted heretofore with respect to any of the foregoing.

                           (b)  NHP shall (i) promptly notify AIMCO in writing
after receipt by NHP (or its Representatives) of any Acquisition Proposal or
any inquiries indicating that any person is considering making or wishes to
make an Acquisition


                                       42
<PAGE>   49
Proposal, (ii) promptly notify AIMCO in writing after receipt of any request
for nonpublic information relating to it or any of its subsidiaries or for
access to its or any of its subsidiaries' properties, books or records by any
person that, to NHP's knowledge, may be considering making, or has made, an
Acquisition Proposal and (iii) keep AIMCO advised of the status and principal
financial terms of any such Acquisition Proposal, indication or request.

                  SECTION 6.7  Stockholder Meetings.

                           (a)  NHP shall take all action necessary, in
accordance with the DGCL and NHP's Organizational Documents, to call a meeting
of its stockholders (the "NHP Meeting") to be held as promptly as practicable
for the purpose of considering and voting upon this Agreement and the Merger.
The vote required for such approval shall be the affirmative vote of the
holders of 66-2/3% of the outstanding shares of NHP Common Stock that is not
owned (within the meaning of Section 203 of the DGCL) by AIMCO (the "NHP
Stockholder Approval").  The Board of Directors of NHP shall recommend that the
stockholders of NHP approve this Agreement and the Merger; provided, that the
Board of Directors of NHP, by action of a majority of the entire Board of
Directors of NHP, or by the Board of Directors with the approval of its
Independent Committee, may withdraw such recommendation if such Board of
Directors determines in good faith, after receipt of an Acquisition Proposal
and after consultation with outside legal counsel, that the withdrawal of such
recommendation is necessary for such Board of Directors to comply with its
fiduciary duties under applicable law.  AIMCO shall vote or cause to be voted
all of the shares of NHP owned by it and its Affiliates in favor of adoption of
this Agreement.

                           (b)  AIMCO shall take all action necessary, in
accordance with the Maryland General Corporation Law and AIMCO's Organizational
Documents, to call a meeting of its stockholders (the "AIMCO Meeting") to be
held as promptly as practicable for the purpose of seeking the AIMCO
Stockholder Approval.  The Board of Directors of AIMCO shall recommend that the
stockholders of AIMCO vote in favor of the matters that are the subject of the
AIMCO Stockholder Approval.

                  SECTION 6.8  Registration Statements and Joint Proxy State-
ment/Prospectus.

                           (a)  As promptly as practicable after the execution
of this Agreement, (i) AIMCO and NHP shall prepare and file with the SEC a
joint proxy


                                       43
<PAGE>   50
statement relating to the NHP Meeting and the AIMCO Meeting to be held in
connection with the Transactions (together with any amendments thereof or
supplements thereto, the "Proxy Statement/Prospectus"), (ii) AIMCO shall
prepare and file with the SEC a registration statement on Form S-4 (together
with all amendments thereto, the "AIMCO Registration Statement"), in which the
Proxy Statement/Prospectus shall be included as a prospectus, in connection
with the registration under the Securities Act of the shares of AIMCO Common
Stock to be issued pursuant to the Merger, and (iii) NHP shall cause the
Mortgage Subsidiary to prepare and file with the SEC a registration statement
on an appropriate form (together with any amendments thereof or supplements
thereto, the "MS Registration Statement"), in which the Proxy
Statement/Prospectus shall be included, in connection with the registration
under applicable Federal securities laws, rules and regulations of the shares
of Mortgage Sub Stock to be distributed pursuant to the Rights and the Rights
Agreement.  Each of AIMCO and NHP (i) shall cause the Proxy State-
ment/Prospectus, the AIMCO Registration Statement and the MS Registration
Statement to comply as to form in all material respects with the applicable
provisions of the Securities Act, the Exchange Act and the rules and
regulations thereunder, (ii) shall use commercially reasonable efforts to have
or cause the AIMCO Registration Statement and the MS Registration Statement to
become effective as promptly as practicable, and (iii) shall take any and all
action required under any applicable Federal or state securities laws in
connection with the issuance of shares of AIMCO Common Stock and Mortgage Sub
Stock pursuant to the Merger.  AIMCO and NHP shall furnish to the other all
information concerning AIMCO and NHP as the other may reasonably request in
connection with the preparation of the documents referred to herein.  As
promptly as practicable after the AIMCO Registration Statement and the MS
Registration Statement shall have become effective, each of AIMCO and NHP shall
mail the Proxy Statement/Prospectus to its respective stockholders.

                           (b)  The information supplied by each of AIMCO and
NHP for inclusion in the AIMCO Registration Statement and the MS Registration
Statement and the Proxy Statement/Prospectus shall not (i) at the time the
AIMCO Registration Statement is declared effective, (ii) at the time the MS
Registration Statement is declared effective, (iii) at the time the Proxy
Statement/Prospectus (or any amendment thereof or supplement thereto) is first
mailed to the stockholders of AIMCO or NHP, (iv) at the time of the NHP
Meeting, (v) at the time of the AIMCO Meeting, or (vi) at the Effective Time,
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 not misleading.  If, at any time prior to the Effective
Time, any event or circumstance relating to NHP, any subsidiary of NHP, AIMCO,
any subsidiary of AIMCO, or their respective officers or direc-


                                       44
<PAGE>   51
tors, should be discovered by such party which should be set forth in an
amendment or a supplement to the AIMCO Registration Statement, the MS
Registration Statement or the Proxy Statement/Prospectus, such party shall
promptly inform the other thereof and take appropriate action in respect
thereof.

                  SECTION 6.9  Letters of Accountants.  AIMCO and NHP shall use
commercially reasonable efforts to cause to be delivered to the other "comfort"
letters of Ernst & Young LLP, AIMCO's independent public accountants, and of
Arthur Andersen LLP, NHP's independent public accountants, respectively, in
each case, dated and delivered on the date on which the AIMCO Registration
Statement shall become effective, on the date on which the MS Registration
Statement shall become effective and as of the Effective Time, and addressed to
the boards of directors of AIMCO and NHP, in form and substance reasonably
satisfactory to the other and reasonably customary in scope and substance for
letters delivered by independent public accountants in connection with
transactions such as those contemplated by this Agreement.

                  SECTION 6.10  Accelerations.  Except as contemplated by this
Agreement, NHP shall take or forbear from taking such action as may be
reasonably necessary and within its control to insure that the Transactions
shall not constitute a change in ownership or control (or other similar event
accelerating or triggering changes to benefits or the terms of any contract,
agreement or arrangement (other than any NHP Benefit Plan) material to NHP and
its subsidiaries, taken as a whole (a "Triggering Event")), for purposes of any
such contract, agreement or arrangement under which any such change in
ownership or control (or other Triggering Event) may be avoided by action or
inaction, as the case may be, by NHP or any of its officers or directors.

                  SECTION 6.11  Public Announcements.  At all times at or
before the Closing, neither NHP nor AIMCO shall issue or make, directly or
indirectly, any reports, statements or releases to the public with respect to
this Agreement or the transactions contemplated hereby without the prior
written consent of the other; provided, however, that NHP and AIMCO may,
without the prior written consent of the other, issue or make, directly or
indirectly, any report, statement or release required by Law, its fiduciary
obligations or any listing agreement or arrangement to which such Person is a
party with a national securities exchange if the other parties to this
Agreement are so notified as soon as possible in advance of such report,
statement or release.



                                       45
<PAGE>   52
                  SECTION 6.12  Blue Sky.  AIMCO shall use its best efforts to
obtain prior to the Effective Time all approvals or permits required to carry
out the transactions contemplated hereby under applicable Blue Sky Laws in
connection with the issuance of shares of AIMCO Common Stock in the Merger and
as contemplated by this Agreement; provided, however, that with respect to such
qualifications neither AIMCO nor NHP shall be required to register or qualify
as a foreign corporation or to take any action which would subject it to
general service of process or taxation in any jurisdiction where any such
entity is not now so subject.

                  SECTION 6.13  NYSE Listing.  AIMCO shall promptly prepare and
submit to the NYSE listing applications covering the shares of AIMCO Common
Stock to be issued in the Merger, and shall use its best efforts to cause such
shares to be approved for listing and trading on the NYSE prior to the
Effective Time, subject to official notice of issuance.

                  SECTION 6.14  Affiliates.  Within 30 days after the date of
this Agreement, (a) NHP shall deliver to AIMCO a letter identifying all persons
who may be deemed to be affiliates of NHP under Rule 145 of the Securities Act
as of the record date for the NHP Meeting (the "Rule 145 Affiliates") and (b)
NHP shall advise the persons identified in such letter of the resale
restrictions imposed by applicable securities laws and shall use commercially
reasonable efforts to obtain from each person identified in such letter a
written agreement, substantially in the form of Exhibit A hereto (a "Rule 145
Affiliate Agreement").  Prior to the Effective Time, AIMCO shall execute and
deliver a Registration Rights Agreement in the form of Exhibit B hereto (the
"Registration Rights Agreement").

                  SECTION 6.15  Indemnification with Respect to the
Registration Statement.

                           (a)  Each party hereto shall (i) indemnify (in such
role, an "Indemnifying Party") and hold harmless each other party and their
respective directors, officers and controlling persons (an "Indemnified Party")
against any and all loss, liability, claim, damage and expense whatsoever to
which an Indemnified Party may become subject, under the Securities Act, the
Exchange Act or otherwise, insofar as such losses, claims, damages or
liabilities (or actions in respect thereof) arise out of any untrue statement
or alleged untrue statement of a material fact contained in the AIMCO
Registration Statement, the MS Registration Statement or the Proxy
Statement/Prospectus, or any amendment or supplement thereto, or any
preliminary Proxy Statement/Prospectus, or the omission or alleged omission
therefrom of a material fact required to be stated therein or necessary to make
the


                                       46
<PAGE>   53
statements therein not misleading; and (ii) will reimburse the Indemnified
Party for any legal or other expenses reasonably incurred by the Indemnified
Party in connection with investigating or defending any such loss, claim,
damage, liability or action as such expenses are incurred; provided, however,
that (i) NHP shall be liable under this Section 6.15 only for information
relating to NHP included or incorporated by reference in the AIMCO Registration
Statement, the MS Registration Statement or Proxy Statement/Prospectus, (ii)
AIMCO and Merger Sub shall be liable under this Section 6.15 only for
information relating to AIMCO and Merger Sub included or incorporated by
reference in the AIMCO Registration Statement, the MS Registration Statement or
Proxy Statement/Prospectus, and (iii) no Indemnifying Party will be liable in
any such case under this Section 6.15 to the extent that any such loss, claim,
damage, liability or action arises out of any untrue statement or alleged
untrue statement or omission or alleged omission made in any of such documents
in reliance upon and in conformity with written information furnished to the
Indemnifying Party by or on behalf of such Indemnified Party specifically for
use therein.

                           (b)  Promptly after receipt by an Indemnified Party
under this Section 6.15 of notice of any claim or the commencement of any
action, the Indemnified Party shall, if a claim in respect thereof is to be
made against the Indemnifying Party under this Section 6.15, promptly notify
the Indemnifying Party in writing of the claim or the commencement of that
action; provided, however, that the failure to notify or a delay in notifying
the Indemnifying Party shall not relieve it from any liability which it may
have to an Indemnified Party otherwise than under this Section 6.15 except to
the extent that such Indemnifying Party is prejudiced thereby.  If any such
claim or action shall be brought against an Indemnified Party, and it shall
notify the Indemnifying Party thereof, the Indemnifying Party shall be entitled
to participate therein, and, to the extent that it wishes, jointly with any
other similarly notified Indemnifying Party, to assume the defense thereof with
counsel reasonably satisfactory to the Indemnified Party.  After notice from
the Indemnifying Party to the Indemnified Party of its election to assume the
defense of such  claim or action, the Indemnifying Party shall not be liable to
the Indemnified Party under this Section 6.15 for any legal or other expenses
subsequently incurred by the Indemnified Party in connection with the defense
thereof, but the fees and expenses of such counsel shall be at the expense of
such Indemnified Party unless (i) the employment thereof has been specifically
authorized by the Indemnifying Party in writing, (ii) such Indemnified Party
shall have been advised by such counsel that there may be one or more legal
defenses available to it which are different from or additional to those
available to the Indemnifying Party and in the reasonable judgment of such
counsel it is advisable for such Indemnified Party to employ


                                       47
<PAGE>   54
separate counsel or (iii) the Indemnifying Party has failed to assume the
defense to such claim or action and employ counsel reasonably satisfactory to
the Indemnified Party, in which case, if such Indemnified Party notifies the
Indemnifying Party in writing that it 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 or action on behalf of such
Indemnified Party; it being understood, however, that the Indemnifying Party
shall not, in connection with any one such claim or action or separate but
substantially similar or related claims or actions in the same jurisdiction
arising out of the same general allegations or circumstances, be liable for the
reasonable fees and expenses of more than one separate firm of attorneys at any
time for all such Indemnified Parties, which firm shall be designated in
writing by such Indemnified Parties.  Each Indemnified Party, as a condition of
the indemnity agreements contained herein shall use its best efforts to
cooperate with the Indemnifying Party in the defense of any such claim or
action.  The Indemnifying Party shall not be liable for any settlement of any
such claim or action effected without its written consent (which consent shall
not be unreasonably withheld), but if settled with its written consent or if
there be a final judgment in favor of the plaintiff in any such claim or
action, the Indemnifying Party agrees to indemnify and hold harmless any
Indemnified Party from and against any loss or liability by reason of such
settlement or judgment.

                  SECTION 6.16  Spin-Off.  Prior to the Closing Date, NHP shall
distribute to all NHP stockholders of record as of a date prior to the Closing
Date one Right for each share of NHP Stock held by each NHP stockholder as of
such date.  Prior to the Effective Time, NHP shall contribute cash to the
Mortgage Subsidiary, forgive indebtedness of the Mortgage Subsidiary, or any
combination of the foregoing, in an aggregate amount equal to NHP's best
estimate (which shall be subject to the prior approval of AIMCO, which approval
shall not be unreasonably withheld) of the amount, if any, by which (x) NHP's
Free Cash Flow for the period from February 1, 1997 until the earlier of the
Effective Time or the Maturity Time, exceeds (y) NHP's Transaction Costs for
such period.  NHP and AIMCO shall use commercially reasonable efforts to obtain
the consent of The First National Bank of Boston to the Spin-Off.

                  SECTION 6.17  Consent to Certain Transactions.  NHP hereby
consents to a Change of Control Transaction (as defined in Section 1.3 of the
Right of First Refusal Agreement) involving AIMCO or any of its subsidiaries or
affiliates pursuant to the Real Estate Acquisition Agreement, provided that (a)
the Real Estate Acquisition Agreement is entered into on or prior to May 31,
1997, (b) such


                                       48
<PAGE>   55
agreement is delivered to NHP, and (c) such consent shall not become effective
until 5:00 p.m., Eastern Time, on May 3, 1997.

                  SECTION 6.18  Directors' and Officers' Indemnification and
Insurance.

                           (a) From and after the Effective Time, the Surviving
Corporation shall, and AIMCO shall cause the Surviving Corporation to,
indemnify, defend and hold harmless the present and former officers and
directors of NHP (the "Indemnified Officers/Directors") against all losses,
expenses (including attorneys fees), claims, damages, liabilities or amounts
("Losses") that are paid in settlement (provided that such settlement has been
approved by AIMCO, such approval not to be unreasonably withheld) of, or
otherwise in connection with, any claim, action, suit, proceeding or
investigation (a "Claim"), based in whole or in part on the fact that such
person is or was a director or officer of NHP and arising out of actions or
omissions occurring at or prior to the Effective Time (including, without
limitation, the Transactions), in each case, to the full extent permitted under
the DGCL and NHP's certificate of incorporation and bylaws (to the extent
permitted by applicable law) as in effect on the date of this Agreement.  The
Surviving Corporation shall pay any expenses in advance of the final
disposition of any such Claim to each of the Indemnified Officers/Directors to
the fullest extent permitted under the DGCL upon receipt from any of the
Indemnified Officers/Directors to whom expenses are advanced of any undertaking
to repay such advances required under the DGCL.  The Surviving Corporation
shall cooperate in the defense of any such matter.

                           (b)  The Surviving Corporation shall, and AIMCO
shall cause the Surviving Corporation to, keep in effect provisions in its
certificate of incorporation and bylaws providing for exculpation of director
liability and its indemnification of the Indemnified Officers/Directors to the
fullest extent permitted under the DGCL, which provisions shall not be amended
except as required by applicable law or except to make changes permitted by law
that would enlarge the right of indemnification of the Indemnified
Officers/Directors.

                           (c)  For a period of three years after the Effective
Time, the Surviving Corporation shall, and AIMCO shall cause the Surviving
Corporation to, maintain in effect the current policies of directors' and
officers' liability insurance maintained by NHP covering persons who are
currently covered by NHP's officers' and directors' liability insurance
policies with respect to actions or omissions occurring at or prior to the
Effective Time, a true and correct summary of which is set forth on Schedule
6.18, to the extent that such policies are available; provided,


                                       49
<PAGE>   56
that policies of at least the same coverage containing terms and conditions
which are no less advantageous to the insureds may be substituted therefor.

                           (d)  From and after the Effective Time, AIMCO agrees
to indemnify, defend and hold harmless the Indemnified Officers/Directors
against all Losses that are paid in settlement (provided that such settlement
has been approved by AIMCO, such approval not to be unreasonably withheld) of,
or otherwise in connection with, a Claim based in whole or in part on the fact
that such Person is or was a director or officer of NHP and arising out of
actions or omissions occurring at or prior to the Effective Time (including,
without limitation, the Transactions), in each case to the fullest extent
permitted by applicable Law and whether or not the Surviving Corporation is
permitted by applicable Law to provide any indemnity with respect to such
Losses.  AIMCO shall pay any expenses in advance of the final disposition of
any such Claim to each of the Indemnified Officers/Directors to the fullest
extent permitted by applicable Law.  AIMCO shall cooperate in the defense of
any such matter.

                           (e)  The provisions of this Section 6.18 shall
survive the consummation of the Merger and expressly are intended to benefit
each of the Indemnified Officers/Directors.

                  SECTION 6.19  NHP Employees.

                           (a)  In the event that any employee of the Surviving
Corporation or one of its subsidiaries is at any time after the Effective Time
transferred to AIMCO or any affiliate of AIMCO or becomes a participant in an
employee benefit plan, program or arrangement maintained by or contributed by
AIMCO or any affiliate of AIMCO, AIMCO shall cause such plan, program or
arrangement to treat the prior service of such employee with NHP and its
subsidiaries, to the extent prior service is generally recognized under the
comparable plan, program or arrangement of NHP, as service rendered to AIMCO or
such affiliates for purposes of eligibility, vesting or entitlement to early
retirement benefits, vacation time or severance benefits under such plans.

                           (b)  At the request and direction of AIMCO, NHP
shall give any notices required by the U.S. Worker Adjustment and Retraining
Notification Act of 1988, as amended ("WARN Act"), or any similar state law or
regulation.

                  SECTION 6.20  Directors.  In the event of any vacancy in the
Board of Directors of NHP arising after the date of this Agreement and after
the Initial


                                       50
<PAGE>   57
Closing (as defined in the Stock Purchase Agreement), NHP shall cause an
individual designated by AIMCO to fill such vacancy, and if such vacancy
resulted from the death, removal or resignation of any director who served as a
member of any committee of NHP's Board of Directors (other than the Independent
Committee) or any board of directors of a subsidiary of NHP, then NHP shall
cause AIMCO's designee to be appointed to such committee or board of directors,
as the case may be.  AIMCO shall not, until the earlier of the Effective Time
or the termination of this Agreement, take any action to remove from office as
a director of NHP any member of the Independent Committee, or increase the
number of NHP directors from that in effect as of the date hereof.

                  SECTION 6.21  Financing.  AIMCO agrees that it will obtain
all financing necessary to consummate the Merger and the transactions
contemplated hereby in accordance with the terms and conditions specified in
this Agreement.

                  SECTION 6.22  Separation Agreement.  Prior to the Effective
Time, NHP shall, and shall cause the Mortgage Subsidiary to, enter into a
separation agreement providing for the Mortgage Subsidiary to assume all
liabilities of NHP relating to the business and operations of the Mortgage
Subsidiary and to indemnify NHP for, and hold NHP harmless from, such
liabilities and all expenses, costs and losses related thereto, all on terms
reasonably acceptable to AIMCO.


                                  ARTICLE VII

                            CONDITIONS TO THE MERGER

                  SECTION 7.1  Conditions to Each Party's Obligation to Effect
the Merger.  The respective obligations of each party to this Agreement to
effect the Merger shall be subject to the following conditions:

                           (a)  All consents, approvals and action of any
Governmental Authority (including, without limitation, the U.S. Department of
Housing and Urban Development) required to permit the consummation of the
Transactions shall have been obtained or made, free of any condition that would
have a Material Adverse Effect on either AIMCO or NHP.

                           (b)  No action shall have been taken, and no
statute, rule, regulation, executive order, judgment, decree, or injunction
(other than a temporary restraining order) shall have been enacted, entered,
promulgated or enforced (and


                                       51
<PAGE>   58
not repealed, superseded, lifted or otherwise made inapplicable), by any court
of competent jurisdiction or Governmental Authority which restrains, enjoins or
otherwise prohibits the consummation of the transactions contemplated by this
Agreement (each party agreeing to use its commercially reasonable efforts to
avoid the effect of any such statute, rule, regulation or order or to have any
such order, judgment, decree or injunction lifted).

                           (c)  Each of the AIMCO Registration Statement and
the MS Registration Statement shall have become effective in accordance with
the provisions of all applicable Federal Securities laws, rules and
regulations, and no stop order suspending such effectiveness shall have been
issued and remain in effect.  AIMCO, NHP and/or the Mortgage Subsidiary shall
have received all state securities or "blue sky" permits and other
authorizations necessary to issue and distribute the AIMCO Common Stock, and
distribute Mortgage Sub Stock, pursuant to this Agreement.

                           (d)  The shares of AIMCO Common Stock shall have
been approved for listing on the NYSE, subject only to official notice of
issuance.

                           (e)  Any applicable waiting period under the HSR Act
shall have expired or been terminated.

                           (f)  The Effective Time shall have occurred on or
prior to December 1, 1997 (the "Outside Date").

                           (g)  AIMCO shall have received the AIMCO Stockholder
Approval.

                           (h)  NHP shall have received the NHP Stockholder
Approval.

                           (i)  The record date for the distribution of the
Rights to NHP stockholders shall have occurred.

                           (j)  The Real Estate Acquisition Agreement shall
have been entered into and neither the Stock Purchase Agreement nor the Real
Estate Acquisition Agreement shall have been terminated.

                  SECTION 7.2  Conditions to Obligations of NHP to Effect the
Merger.  The obligations of NHP to effect the Merger are subject to the
satisfaction of the following conditions, unless waived by NHP:



                                       52
<PAGE>   59
                           (a)  The representations and warranties of AIMCO and
Merger Sub contained herein that are qualified as to materiality shall be true
and accurate, and those not so qualified shall be true and accurate in all
material respects, in each case, at and as of the Effective Time with the same
force and effect as though made at and as of the Effective Time (except to the
extent a representation or warranty speaks specifically as of an earlier date
or except as contemplated by this Agreement); provided, that any
representation and warranty that is true and accurate as of the date hereof (or
such earlier date as set forth above) shall be deemed to be true and accurate
at and as of the Effective Time except to the extent that AIMCO or any of its
subsidiaries shall have taken any voluntary action completely within the
control of such person that has been the principal cause of such representation
or warranty not being true and accurate; and provided, further, that the
representations and warranties set forth in Section 5.9 and clause (ii) of
Section 5.8 shall be true and accurate only as of the date hereof.

                           (b)  AIMCO and Merger Sub shall have performed, in
all material respects, all obligations and complied, in all material respects,
with all covenants required by this Agreement to be performed or complied with
by them prior to the Effective Time.

                           (c)  AIMCO shall have delivered to NHP a
certificate, dated the Effective Time and signed by its Chairman of the Board
and Chief Executive Officer or President, evidencing compliance with Sections
7.2(a) and (b).

                           (d)  NHP shall have received an opinion of Skadden,
Arps, Slate, Meagher & Flom LLP, counsel to AIMCO and Merger Sub, and an
opinion of Piper & Marbury L.L.P., Maryland counsel to AIMCO, in each case, in
form and substance reasonably satisfactory to NHP, addressing the matters set
forth in Exhibit C-1 and Exhibit C-2, respectively.

                           (e)  DLJ shall not have withdrawn the Fairness
Opinion.

                           (f)  The Stock Purchase Agreement shall not have
been amended so as to increase the consideration payable to Demeter and
Capricorn thereunder.

                  SECTION 7.3  Conditions to Obligations of AIMCO and Merger
Sub to Effect the Merger.  The obligations of AIMCO and Merger Sub to effect
the Merger are subject to the satisfaction of the following conditions, unless
waived by AIMCO and Merger Sub:


                                       53
<PAGE>   60

                           (a)  The representations and warranties of NHP
contained herein that are qualified as to materiality shall be true and
accurate, and those not so qualified shall be true and accurate in all material
respects, in each case at and as of the Effective Time with the same force and
effect as though made at and as of the Effective Time (except to the extent a
representation or warranty speaks specifically as of an earlier date or except
as contemplated by this Agreement); provided, that any representation and
warranty that is true and accurate as of the date hereof (or such earlier date
as set forth above) shall be deemed to be true and accurate at and as of the
Effective Time except to the extent that NHP and its subsidiaries shall have
taken any voluntary action completely within the control of such person, that
has been the principal cause of such representation or warranty not being true
and accurate; and provided, further, that the representations and warranties
set forth in Section 4.9 and clause (ii) of Section 4.8 shall be true and
accurate only as of the date hereof.

                           (b)  NHP shall have performed, in all material
respects, all obligations and complied, in all material respects, with all
covenants required by this Agreement to be performed or complied with by it
prior to the Effective Time.

                           (c)  NHP shall have delivered to AIMCO a
certificate, dated the Effective Time and signed by its Chairman of the Board
and Chief Executive Officer or President, evidencing compliance with Sections
7.3(a) and (b).

                           (d)  AIMCO shall have received from each Rule 145
Affiliate of NHP an executed copy of a Rule 145 Affiliate Agreement from each
Rule 145 Affiliate as contemplated by Section 6.14.

                           (e)  AIMCO and Merger Sub shall have received an
opinion of Wilmer, Cutler & Pickering, counsel to NHP, and an opinion of Arent
Fox Kintner Plotkin & Kahn, in each case, in form and substance reasonably
satisfactory to AIMCO and Merger Sub, addressing the matters set forth in
Exhibit D-1 and Exhibit D-2, respectively.


                                  ARTICLE VIII

                   TERMINATION, WAIVER, AMENDMENT AND CLOSING

                  SECTION 8.1  Termination.  This Agreement may be terminated
and abandoned at any time prior to the Effective Time, whether before or after
approval


                                       54
<PAGE>   61
of this Agreement, the Merger and the other Transactions by the respective
stockholders of NHP and AIMCO:

                           (a)  by the mutual written consent of NHP and AIMCO;

                           (b)  by NHP or AIMCO, if (i) the Effective Time
shall not have occurred on or before the Outside Date, (ii) any Governmental
Authority, the consent of which is a condition to the obligations of NHP and
AIMCO to consummate the Transactions, shall have determined not to grant its
consent and all appeals of such determination shall have been taken and have
been unsuccessful or (iii) any court of competent jurisdiction shall have
issued an order, judgment or decree (other than a temporary restraining order)
restraining, enjoining or otherwise prohibiting the Merger and such order,
judgment or decree shall have become final and nonappealable; provided,
however, that the right to terminate this Agreement pursuant to clause
(i) shall not be available to any party whose failure to fulfill any obligation
under this Agreement has been the cause of, or resulted in, the failure of the
Effective Time to occur on or before such date;

                           (c)  by NHP, if there has been a material breach by
AIMCO of any representation, warranty, covenant or agreement set forth in this
Agreement, which breach has not been cured within ten Business Days following
receipt by AIMCO of notice of such breach from NHP; provided, however, that the
right to terminate this Agreement pursuant to this Section 8.1(c) shall not be
available to NHP if NHP, at such time, is in material breach of any
representation, warranty, covenant or agreement set forth in this Agreement;

                           (d)  by AIMCO, if there has been a material breach
by NHP of any representation, warranty, covenant or agreement set forth in this
Agreement, which breach has not been cured within ten Business Days following
receipt by NHP of notice of such breach from AIMCO;  provided, however, that
the right to terminate this Agreement pursuant to this Section 8.1(d) shall
not be available to AIMCO if AIMCO, at such time, is in material breach of any
representation, warranty, covenant or agreement set forth in this Agreement;

                           (e)  by AIMCO or NHP if, at the NHP Meeting
(including any adjournment or postponement thereof) called pursuant to Section
6.7 hereof, the NHP Stockholder Approval shall not have been obtained;



                                       55
<PAGE>   62
                           (f)  by AIMCO or NHP if, at the AIMCO Meeting
(including any adjournment or postponement thereof) called pursuant to Section
6.7 hereof, the AIMCO Stockholder Approval shall not have been obtained;

                           (g)  by NHP if (i) NHP receives an alternative
Acquisition Proposal, (ii) NHP is not then in breach of Section 6.6 or in
breach of any other representation, warranty, covenant or agreement that would
give rise to a failure of a condition set forth in Section 7.3(a) or 7.3(b),
(iii) NHP shall have made the payment required by Section 8.5, (iv) at least
three Business Days prior to such termination, NHP shall have provided to AIMCO
written notice (A) as to the material terms of any such Acquisition Proposal
and (B) that the Board of Directors of NHP, in the exercise of its good faith
judgment as to fiduciary duties to stockholders under applicable law, after
consultation with outside legal counsel, has determined, by action of a
majority of the entire Board of Directors of NHP, or by the Board of Directors
with the approval of its Independent Committee, that such termination is
necessary in order for such Board of Directors to comply with such duties, and
(iv) on the date of such termination, the Board of Directors of NHP determines,
by action of a majority of the entire Board of Directors of NHP, or by the
Board of Directors with the approval of its Independent Committee, that such
termination continues to be necessary in order for such Board of Directors to
comply with its fiduciary duties to stockholders under applicable law (which
determination shall be made in light of any revised proposal made by AIMCO) and
NHP concurrently enters into a definitive agreement providing for the
implementation of such Acquisition Proposal; and

                           (h)  by AIMCO or NHP if (i) the Real Estate
Acquisition Agreement has not been entered into by May 31, 1997, or (ii) either
the Stock Purchase Agreement or the Real Estate Acquisition Agreement is
terminated in accordance with its terms.

                  SECTION 8.2  Effect of Termination.  In the event of
termination of this Agreement by NHP or AIMCO as provided in Section 8.1
hereof, this Agreement shall forthwith become void (except Sections 6.5(b),
6.15, 8.2, 8.5, 9.1, 9.2, 9.5, 9.6, 9.7, 9.8, 9.9, 9.10, 9.14 or 9.15) and
there shall be no liability on the part of NHP, AIMCO, Merger Sub or their
respective officers or directors, except for any breach of a party's
obligations under Sections 6.5(b), 6.15, 8.2, 8.5, 9.1, 9.2, 9.5, 9.6, 9.7,
9.8, 9.9, 9.10, 9.14 and 9.15.  Notwithstanding the foregoing,no party hereto
shall be relieved from liability for any willful, material breach of this
Agreement.



                                       56
<PAGE>   63
                  SECTION 8.3  Amendment or Supplement.  At any time before or
after approval of this Agreement by the stockholders of NHP or AIMCO and prior
to the Effective Time, this Agreement may be amended or supplemented in writing
by NHP, Merger Sub and AIMCO with respect to any of the terms contained in this
Agreement, except that following approval by the stockholders of NHP or AIMCO
there shall be no amendment or supplement which by law requires further
approval by such stockholders without such further approval by the stockholders
of NHP or AIMCO, as the case may be.

                  SECTION 8.4  Extension of Time, Waiver, Etc.  At any time
prior to the Effective Time:

                           (a)  AIMCO may extend the time for the performance
of any of the obligations or acts of NHP, and NHP may extend the time for the
performance of any of the obligations or acts of AIMCO or Merger Sub;

                           (b)  AIMCO may waive any inaccuracies in the
representations and warranties of NHP contained herein or in any document
delivered pursuant hereto, and NHP may waive any inaccuracies in the
representations and warranties of AIMCO contained herein or in any document
delivered pursuant hereto; or

                           (c)  AIMCO may waive compliance with any of the
agreements of NHP contained herein, and NHP may waive compliance with any of
the agreements of AIMCO or Merger Sub contained herein; provided, however, that
no failure or delay by NHP or AIMCO in exercising any right hereunder shall
operate as a waiver thereof nor shall any single or partial exercise thereof
preclude any other or further exercise thereof or the exercise of any other
right hereunder.

                  SECTION 8.5  Termination Fee.  If this Agreement is to be
terminated pursuant to Section 8.1(e) or 8.1(g), and if NHP is not entitled to
terminate this Agreement by reason of Section 8.1(b), 8.1(c) or 8.1(f), then,
in addition to any other rights or remedies that may be available to AIMCO, NHP
shall promptly (and in any event within two days of receipt by NHP of written
notice from AIMCO) pay to AIMCO (by wire transfer of immediately available
funds to an account designated by AIMCO) a termination fee of $4.0 million;
provided, however, that NHP shall not be obligated to pay such fee to AIMCO if
this Agreement is terminated pursuant to Section 8.1(e) unless (i) (A) at the
time of the NHP Meeting, NHP has received an alternative Acquisition Proposal,
and (B) prior to the termination of this Agreement, the Board of Directors of
NHP shall have withdrawn, or modified in a manner adverse to AIMCO, its
approval or recommen-


                                       57
<PAGE>   64
dation of the Merger, and (ii) within two years after the termination of this
Agreement, NHP enters into a definitive agreement providing for an
alternative Acquisition Proposal or an alternative Acquisition Proposal is
consummated with any Person; and, provided, further, that if such termination
fee becomes payable as a result of a termination pursuant to Section 8.1(e),
then such termination fee shall be paid promptly following the earlier of the
execution of such definitive agreement providing for an alternative Acquisition
Proposal and the consummation of an alternative Acquisition Proposal, as the
case may be.  If this Agreement is terminated pursuant to Section 8.1(e) and
(i) prior to the termination of this Agreement, the Board of Directors of NHP
shall have withdrawn, or modified in a manner adverse to AIMCO, its approval or
recommendation of the Merger, and (ii) NHP is not at that time obligated to pay
the termination fee pursuant to the first proviso of the preceding sentence,
then NHP shall pay to AIMCO, on demand, an amount equal to the documented
out-of-pocket expenses incurred by AIMCO in connection with this Agreement and
the Merger, provided, that the maximum amount of such expenses that NHP is
required to reimburse shall not exceed $4.0 million (which expense
reimbursement shall be credited against any termination fee that subsequently
becomes payable pursuant to clause (ii) of the preceding sentence).


                                   ARTICLE IX

                                 MISCELLANEOUS

                  SECTION 9.1  Governing Law.  This Agreement and the legal
relations among the parties hereto shall be governed by and construed and
enforced in accordance with the laws of the State of Delaware, without regard
to its principles of conflicts of law.

                  SECTION 9.2  Entire Agreement.  This Agreement, including the
exhibits and schedules attached hereto, constitutes the entire agreement among
the parties pertaining to the subject matter hereof and supersedes all prior
agreements, understandings, letters of intent, negotiations and discussions,
whether oral or written, of the parties, and there are no warranties,
representations or other agreements, express or implied, made to any party by
any other party in connection with the subject matter hereof except as
specifically set forth herein or in the documents delivered pursuant hereto or
in connection herewith.

                  SECTION 9.3  Modification; Waiver.  No supplement,
modification, extension, waiver or termination of this Agreement shall be
binding unless executed


                                       58
<PAGE>   65
in writing by the party to be bound thereby.  No waiver of any provision of
this Agreement shall be deemed or shall constitute a waiver of any other
provision hereof (whether or not similar), nor shall such waiver constitute a
continuing waiver unless otherwise expressly provided.

                  SECTION 9.4  Notices.  All notices, consents, requests,
reports, demands or other communications hereunder (collectively, "Notices")
shall be in writing and may be given personally, by registered mail, fax or by
Federal Express (or other reputable overnight delivery service):

         if to AIMCO or Merger Sub, to it at:

                           1873 South Bellaire Street, 17th Floor
                           Denver, Colorado  80222-4348
                           Attention:  Mr. Terry Considine
                           Telephone:  (303) 757-8600
                           Fax:  (303) 753-9538

                           and

                           28200 Highway 189, Building F-240
                           P.O. Box 1060
                           Lake Arrowhead, California  92352
                           Attention:  Mr. Peter K. Kompaniez
                           Telephone:  (909) 336-4821
                           Fax:  (909) 336-4826

         with a copy to:

                           Skadden, Arps, Slate, Meagher & Flom LLP
                           300 South Grand Avenue, Suite 3400
                           Los Angeles, California  90071
                           Attention:  Rod A. Guerra, Esq.
                           Telephone:  (213) 687-5000
                           Fax:  (213) 687-5600



                                       59
<PAGE>   66
         if to NHP, to it at:

                           8065 Leesburg Pike, Suite 400
                           Vienna, Virginia 22182
                           Attention:  Mr. J. Roderick Heller III and
                                       Joel Bonder, Esq.
                           Telephone:  (703) 394-2470
                           Fax:  (703) 394-2970

         with a copy to:

                           Wilmer, Cutler & Pickering
                           2445 M Street, N.W.
                           Washington, D.C.  20037
                           Attention:  Richard W. Cass, Esq.
                           Telephone:  (202) 663-6503
                           Fax:  (202) 663-6363

or to such other address or such other person as the addressee party shall have
last designated by notice to the other party.  All Notices shall be deemed to
have been given (i) when delivered personally, (ii) three days after being sent
by registered mail, (iii) upon transmission by fax and receipt of confirmation
of such transmission by the sender's fax machine, or (iv) one day after being
sent by Federal Express (or other reputable overnight delivery service).

                  SECTION 9.5  Expenses.  Whether or not the transactions
contemplated by this Agreement shall be consummated, all fees and expenses
incurred by any party hereto in connection with this Agreement shall be borne
by such party, except that the expenses incurred in connection with printing
the Proxy Statement/Prospectus shall be paid in equal shares by NHP and
AIMCO.

                  SECTION 9.6  Assignment.  No party hereto shall have the
right, power or authority to assign or pledge this Agreement or any portion of
this Agreement, or to delegate any duties or obligations arising under this
Agreement, voluntarily, involuntarily, or by operation of law, without the
prior written consent of the other parties hereto.

                  SECTION 9.7  Survival.  None of the representations and
warranties in this Agreement or in any document or instrument delivered
pursuant to this


                                       60
<PAGE>   67
Agreement shall survive the Merger or the termination of this Agreement
pursuant to Article VIII.

                  SECTION 9.8  Severability.  Any provision or part of this
Agreement which is invalid or unenforceable in any situation in any
jurisdiction shall, as to such situation and such jurisdiction, be ineffective
only to the extent of such invalidity and shall not affect the enforceability
of the remaining provisions hereof or the validity or enforceability of any
such provision in any other situation or in any other jurisdiction.

                  SECTION 9.9  Successors and Assigns; Third Parties.  Subject
to and without waiver of the provisions of Section 9.6, all of the rights,
duties, benefits, liabilities and obligations of the parties shall inure to the
benefit of, and be binding upon, their respective successors, assigns, heirs
and legal representatives.  Except as specifically set forth in Section 3.2,
3.3, 3.6, 6.15, 6.18 and 6.19, nothing herein expressed or implied is intended
or shall be construed to confer upon or give to any person or entity, other
than the parties hereto and their successors or permitted assigns, any rights
or remedies under or by reason of this Agreement.

                  SECTION 9.10  Counterparts.  This Agreement may be executed
in as many counterparts as may be deemed necessary and convenient, and by the
different parties hereto on separate counterparts each of which, when so
executed, shall be deemed an original, but all such counterparts shall
constitute one and the same instrument.

                  SECTION 9.11  Interpretation; References.  Any use of
masculine, feminine or neuter pronouns herein shall not be limiting, but shall
be construed as referring to persons of any gender, as the context may require.
Any use of the singular or plural form herein shall not be limiting, but shall
be construed as referring to either the plural or singular, as the context may
require.  References to a "Schedule" or an "Exhibit" are, unless otherwise
specified, to a Schedule or an Exhibit attached to this Agreement, and
references to an "Article" or a "Section" are, unless otherwise specified, to
an Article or a Section of this Agreement.  The Article and Section headings of
this Agreement are for convenience of reference only and shall not be deemed to
modify, explain, restrict, alter or affect the meaning or interpretation of any
provision hereof.

                  SECTION 9.12  Jurisdiction.  The parties hereto hereby agree
that any disputes arising out of, in connection with or with respect to this
Agreement, the subject matter hereof, the performance or non-performance of any
obligation


                                       61
<PAGE>   68
hereunder, or any of the transactions contemplated hereby shall be adjudicated
in a state or federal court of competent civil jurisdiction sitting in the
State of Delaware and nowhere else.  Each of the parties hereto hereby
irrevocably submits to the jurisdiction of any such court of the purposes of
any suit, civil action or other proceeding arising out of, in connection with
or with respect to this Agreement, the subject matter hereof, the performance
of non-performance of any obligation hereunder, or any of the transactions
contemplated hereby (each, a "Suit").  To the extent permitted by Law, each of
the parties hereto hereby waives and agrees not to assert by way of motion, as
a defense or otherwise in any such Suit, any claim that it is not subject to
the jurisdiction of the above courts, that such Suit is brought in an
inconvenient forum, that the venue of such Suit is improper or that it is
entitled to a trial by jury.

                  SECTION 9.13  Exhibits and Schedules.  All exhibits and
schedules attached hereto are hereby incorporated by reference as though set
out in full herein.

                  SECTION 9.14  Attorneys' Fees.  In the event that any party
hereto brings an action or proceeding against the other party to enforce or
interpret any of the covenants, conditions, agreements or provisions of this
Agreement, the prevailing party in such action or proceeding shall be entitled
to recover all costs and expenses of such action or proceeding, including,
without limitation, reasonable attorneys' fees, charges, disbursements and the
fees and costs of expert witnesses.

                  SECTION 9.15  Waiver of Jury Trial.  Each party to this
Agreement further waives its respective right to a jury trial of any claim or
cause of action arising out of this Agreement or any dealings between any of
the parties hereto relating to the subject matter of this Agreement.  The scope
of this waiver is intended to be all-encompassing of any and all disputes that
may be filed in any court and that relate to the subject matter of this
Agreement, including, without limitation, contract claims, tort claims and all
other common law and statutory claims.  This waiver is irrevocable, meaning
that it may not be modified either orally or in writing, and this waiver shall
apply to any subsequent amendments, supplements or other modifications to this
Agreement or to any other document or agreement relating to the Transactions.

                  SECTION 9.16  Further Assurances.  Each of the parties shall,
without further consideration, use reasonable efforts to execute and deliver
such additional documents and take such other action as the other parties, or
any of them, may reasonably request to carry out the intent of this Agreement
and the Transactions.


                                       62
<PAGE>   69

                  SECTION 9.17  Negotiation of Agreement.  Each of the parties
acknowledges that it has been represented by independent counsel of its choice
throughout all negotiations that have preceded the execution of this Agreement
and that it has executed the same with consent and upon the advice of said
independent counsel.  Each party and its counsel cooperated in the drafting and
preparation of this Agreement and the documents referred to herein, and any and
all drafts relating thereto shall be deemed the work product of the parties and
may not be construed against any party by reason of its preparation.
Accordingly, any rule of law or any legal decision that would require
interpretation of any ambiguities in this Agreement against the party that
drafted it is of no application and is hereby expressly waived.  The provisions
of this Agreement shall be interpreted in a reasonable manner to effect the
intentions of the parties and this Agreement.

[signature page follows]


                                       63
<PAGE>   70
                  IN WITNESS WHEREOF, the parties hereto have caused this
Agreement to be duly executed and delivered as of the date first above written.

                                  NHP INCORPORATED
                                  
                                  
                                  By   /s/ J. Roderick Heller, III    
                                     -------------------------------- 
                                     Name:  J. Roderick Heller, III
                                     Title: Chairman, President and
                                              Chief Executive Officer
                                                                      
                                                                      
                                                                      
                                                                      
                                  APARTMENT INVESTMENT AND MAN-       
                                  AGEMENT COMPANY                     
                                                                      
                                                                      
                                  By   /s/ Peter Kompaniez            
                                     -------------------------------- 
                                     Name:  Peter Kompaniez
                                     Title: Vice Chairman

                                                                      
                                                                      
                                                                      
                                  AIMCO/NHP ACQUISITION CORP.         
                                                                      
                                                                      
                                  By   /s/ Peter Kompaniez            
                                     -------------------------------- 
                                     Name:  Peter Kompaniez
                                     Title: Vice President
                                           
<PAGE>   71

                                  EXHIBITS TO
                          AGREEMENT AND PLAN OF MERGER
                                  dated as of
                                 April 21, 1997
                                  by and among
                  APARTMENT INVESTMENT AND MANAGEMENT COMPANY,
                          AIMCO/NHP ACQUISITION CORP.
                                      and
                                NHP INCORPORATED




<PAGE>   72





<TABLE>
<CAPTION>
                                                  INDEX
                                                  -----
<S>                        <C>                                                                        <C>
EXHIBIT A                  Form of Affiliate Letter................................................... A-1

EXHIBIT B                  Registration Rights Agreement ............................................. B-1

EXHIBIT C-1                Form of Legal Opinion of Skadden, Arps,
                           Slate, Meagher & Flom LLP, Counsel to
                           AIMCO and Merger Sub.......................................................C1-1

EXHIBIT C-2                Form of Legal Opinion of Piper & Marbury
                           L.L.P., Maryland Counsel to AIMCO..........................................C2-1

EXHIBIT D-1                Form of Legal Opinion of Wilmer, Cutler
                           & Pickering, Counsel to NHP................................................D1-1

EXHIBIT D-2                Form of Legal Opinion of Arent Fox Kintner
                           Plotkin & Kahn, Special Counsel to NHP.....................................D2-1
</TABLE>





<PAGE>   73



                                                                       EXHIBIT A


                            FORM OF AFFILIATE LETTER


Apartment Investment and Management Company
1873 South Bellaire Street, 17th Floor
Denver, Colorado  80222-4348

Ladies and Gentlemen:

                  I have been advised that, as of the date of this letter
agreement, I may be deemed to be an "affiliate" of NHP Incorporated, a Delaware
corporation ("NHP"), as such term is defined for purposes of paragraphs (c) and
(d) of Rule 145 of the rules and regulations (the "Rules and Regulations") of
the Securities and Exchange Commission (the "Commission") under the Securities
Act of 1933, as amended (the "Act").

                  Pursuant to the terms of the Agreement and Plan of Merger,
dated as of April 21, 1997 (the "Merger Agreement"), by and among Apartment
Investment and Management Company, a Maryland corporation ("AIMCO"), NHP and
AIMCO/NHP Acquisition Corp., a Delaware corporation and a wholly owned
subsidiary of AIMCO ("Merger Sub"), Merger Sub will be merged with and into NHP
(the "Merger").  Pursuant to the Merger, all of the shares of Common Stock, par
value $0.01 per share, of NHP owned by the undersigned will be converted into
the right to receive shares of Class A Common Stock, par value $0.01 per share,
of AIMCO (the "AIMCO Common Stock"), or a combination of cash and shares of
AIMCO Common Stock.

                  I represent, warrant and covenant to AIMCO that, with respect
to all shares of AIMCO Common Stock received as a result of the Merger:

                  1.       I shall not make any sale, transfer or other
disposition of the shares of AIMCO Common Stock in violation of the Act or the
Rules and Regulations.

                  2.       I have carefully read this letter and the Merger
Agreement and have had an opportunity to discuss the requirements of such
documents and any other applicable limitations upon my ability to sell,
transfer or otherwise dispose of shares of AIMCO Common Stock with my counsel
or counsel for NHP.

                  3.       I have been advised that the issuance of shares of
AIMCO Common Stock to me pursuant to the Merger has been registered with the
Commission under the Act.  However, I have also been advised that, since at the
time the Merger was submitted for a vote of the stockholders of NHP, I may be
deemed to have been an affiliate of NHP and the distribution by me of the AIMCO
Common Stock has not been registered under the Act, I may not sell, transfer or
otherwise dispose of shares of AIMCO


                                      A-1

<PAGE>   74



Common Stock issued to me in the Merger unless (i) such sale, transfer or other
disposition has been registered under the Act or is made in conformity with
Rule 145 under the Act, or (ii) in the opinion of counsel reasonably acceptable
to AIMCO, or pursuant to a "no action" letter obtained by the undersigned from
the staff of the Commission, such sale, transfer or other disposition is
otherwise exempt from registration under the Act.

                  4.       I understand that, except as provided in the
Registration Rights Agreement to be entered into by AIMCO and the undersigned
as contemplated by the Merger Agreement, AIMCO is under no obligation to
register under the Act the sale, transfer or other disposition of shares of
AIMCO Common Stock by me or on my behalf or to take any other action necessary
in order to make compliance with an exemption from such registration available.

                  5.       I understand that AIMCO will give stop transfer
instructions to AIMCO's transfer agents with respect to the AIMCO Common Stock
and that the certificates for the shares of AIMCO Common Stock issued to me, or
any substitutions therefor, will bear a legend substantially to the following
effect:

         "THE SECURITIES REPRESENTED BY THIS CERTIFICATE WERE
         ISSUED IN A TRANSACTION TO WHICH RULE 145 UNDER THE
         SECURITIES ACT OF 1933 APPLIES.  THE SECURITIES REPRE-
         SENTED BY THIS CERTIFICATE MAY ONLY BE TRANSFERRED
         IN ACCORDANCE WITH THE TERMS OF AN AGREEMENT,
         DATED ___________, BETWEEN THE REGISTERED HOLDER
         HEREOF AND __________, A COPY OF WHICH AGREEMENT IS
         ON FILE AT THE PRINCIPAL OFFICES OF             ."

                  6.       I also understand that unless the transfer by me of
my shares of AIMCO Common Stock has been registered under the Act or is a sale
made in conformity with the provisions of Rule 145, AIMCO reserves the right
to place a legend substantially to the following effect on the certificates
issued to any transferee:

         "THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE
         NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933
         AND WERE ACQUIRED FROM A PERSON WHO RECEIVED SUCH
         SECURITIES IN A TRANSACTION TO WHICH RULE 145 UNDER
         THE SECURITIES ACT OF 1933 APPLIES.  THE SECURITIES HAVE
         NOT BEEN ACQUIRED BY THE HOLDER WITH A VIEW TO, OR
         FOR RESALE IN CONNECTION WITH, ANY DISTRIBUTION
         THEREOF WITHIN THE MEANING OF THE SECURITIES ACT OF
         1933 AND MAY NOT BE SOLD, PLEDGED OR OTHERWISE
         TRANSFERRED EXCEPT PURSUANT TO AN EFFECTIVE REGIS-
         TRATION STATEMENT OR IN ACCORDANCE WITH AN EXEMP-


                                      A-2

<PAGE>   75



         TION FROM THE REGISTRATION REQUIREMENTS OF THE SECU-
         RITIES ACT OF 1933."

                  It is understood and agreed that the legends set forth in
paragraphs 5 and 6 above shall be removed by delivery of substitute
certificates without such legend if such legend is not required for purposes of
the Act.  It is understood and agreed that such legends and the stop orders
referred to above will be removed if (i) one year shall have elapsed from the
date the undersigned acquired the Securities received in the Merger and the
provisions of Rule 145(d)(2) are then available to the undersigned, (ii) two
years shall have elapsed from the date the undersigned acquired the shares of
AIMCO Common Stock received in the Merger and the provisions of Rule 145(d)(3)
are then available to the undersigned, or (iii) AIMCO has received either an
opinion of counsel, which opinion and counsel shall be reasonably
satisfactory to AIMCO, or a "no action" letter obtained by the undersigned from
the staff of the Commission, to the effect that the restrictions imposed by
Rule 145 under the Act no longer apply to the undersigned.

                  Execution of this letter should not be considered an
admission on my part that I am an "affiliate" of NHP as described in the first
paragraph of this letter.

                  AIMCO agrees that, for a period of at least two years after
the effective date of Merger, it will make publicly available the information
required by, and in the manner specified by, Rule 144(c) under the Act.


                                             Sincerely,



                                             ---------------------------------
                                             Name:


Accepted this      day of                      , 1997:
             ------      ----------------------

APARTMENT INVESTMENT AND MANAGEMENT COMPANY



By:
   -----------------------------
   Name:
   Title:


                                      A-3

<PAGE>   76




                                                                       EXHIBIT B



                         REGISTRATION RIGHTS AGREEMENT


                           This REGISTRATION RIGHTS AGREEMENT (the "Agreement")
is made and entered into as of            , 1997, by and among Apartment
Investment and Management Company, a Maryland corporation ("AIMCO"), and the
persons named on the signature pages hereto (each, an "Investor" and,
collectively, the "Investors").

                           WHEREAS, the Investors own shares of common stock,
par value $.01 per share (the "NHP Shares"), of NHP Incorporated, a Delaware
corporation ("NHP");

                           WHEREAS, in connection with the Agreement and Plan
of Merger, dated as of April 21, 1997 (the "Merger Agreement"), by and among
AIMCO, NHP, and AIMCO/NHP Acquisition Corp., a Delaware corporation and a
wholly owned subsidiary of AIMCO ("Merger Sub"), Merger Sub will be merged with
and into NHP and the NHP Shares will be converted into shares of AIMCO Common
Stock (as defined below) and/or cash; and

                           WHEREAS, in order to induce the Investors to execute
and deliver to AIMCO the letters contemplated by Section 6.14 of the Merger
Agreement, AIMCO has agreed to provide the registration rights set forth in
this Agreement.

                           NOW THEREFORE, in consideration of the mutual
covenants and agreements set forth herein, and for other good and valuable
consideration, the receipt and sufficiency of which is hereby acknowledged, the
parties hereto, intending to be legally bound hereby, agree as follows:

SECTION 7.  Definitions.

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

                           "Advice" shall have the meaning set forth in Section
4.

                           "Affiliate" means, with respect to any specified
person, any other person directly or indirectly controlling or controlled by or
under direct or indirect common control with such specified person.  For the
purposes of this


                                      B-1

<PAGE>   77



definition, "control" when used with respect to any specified person means the
power to direct the management and policies of such person, directly or
indirectly, whether through the ownership of voting securities, by contract or
otherwise; and the terms "controlling" and "controlled" have meanings
correlative to the foregoing.

                           "AIMCO" shall have the meaning set forth in the
introductory clauses hereof.

                           "AIMCO Common Stock" means the Class A Common Stock,
par value $0.01 per share, of AIMCO issued  pursuant to the Merger Agreement,
or any other shares of Capital Stock or other securities into which such shares
of AIMCO Common Stock shall be reclassified or changed, including, without
limitation, by reason of a merger, consolidation, exchange, reorganization or
recapitalization.  If the AIMCO Common Stock has been so reclassified or
changed, or if AIMCO pays a dividend or makes a distribution on the AIMCO
Common Stock in shares of Capital Stock or other securities, or subdivides (or
combines) its outstanding shares of AIMCO Common Stock into a greater (or
smaller) number of shares of AIMCO Common Stock, a share of AIMCO Common Stock
shall be deemed to be such number of shares of Capital Stock and amount of
other securities to which a holder of a share of AIMCO Common Stock outstanding
immediately prior to such change, reclassification, exchange, dividend,
distribution, subdivision or combination would be entitled.

                           "Business Day" means any day that is not a Saturday,
a Sunday or a legal holiday on which banking institutions in the State of New
York are not required to be open.

                           "Capital Stock" means, with respect to any person,
any and all shares, interests, participations or other equivalents (however
designated) of corporate stock issued by such person, including each class of
common stock and preferred stock of such person.

                           "Delay Period" shall have the meaning set forth in
Section 2(d).

                           "Demand Notice" shall have the meaning set forth in
Section 2(b).

                           "Demand Registration" shall have the meaning set
forth in Section 2(c).

                           "Effectiveness Period" shall have the meaning set
forth in Section 2(d).



                                      B-2

<PAGE>   78



                           "Exchange Act" means the Securities Exchange Act of
1934, as amended, and the rules and regulations of the SEC promulgated
thereunder.

                           "Hold-back Period" shall have the meaning set forth
in Section 3.

                           "Holder" means a person who owns Registrable
Securities and is either (i) an Investor, (ii) a person that has agreed to be
bound by the terms of this Agreement as if such person were an Investor and is
(A) a person to whom an Investor has transferred Registrable Securities in a
transaction not involving a public offering (e.g. pursuant to Rule "4(1-1/2)"
or any similar private transfer exemption), (B) upon the death of any Investor,
the executor of the estate of such Investor or such Investor's heirs, devisees,
legatees or assigns or (iii) upon the disability of any Investor, any guardian
or conservator of such Investor.

                           "Initial Shelf Registration" shall have the meaning
set forth in Section 2(a).

                           "Interruption Period" shall have the meaning set
forth in Section 4.

                           "Investor(s)" shall have the meaning set forth in
the introductory clauses hereof.

                           "Merger Agreement" shall have the meaning set forth
in the introductory clauses hereof.

                           "Merger Sub" shall have the meaning set forth in the
introductory clauses hereof.

                           "NHP" shall have the meaning set forth in the
introductory clauses hereof.

                           "NHP Shares" shall have the meaning set forth in the
introductory clauses hereof.

                           "person" means any individual, corporation,
partnership, limited liability company, joint venture, association, joint-stock
company, trust, unincorporated organization or government or any agency or
political subdivision thereof.

                           "Prospectus" means the prospectus included in any
Registration Statement (including, without limitation, a prospectus that
discloses information previously omitted from a prospectus filed as part of an
effective registration statement in reliance upon Rule 430A), as amended or
supplemented by any


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prospectus supplement, with respect to the terms of the offering of any portion
of the Registrable Securities covered by such Registration Statement and all
other amendments and supplements to such prospectus, including post-effective
amendments, and all material incorporated by reference or deemed to be
incorporated by reference in such prospectus.

                           "Registrable Securities" means shares of AIMCO
Common Stock of an Investor unless (i) such securities have previously been
disposed of by a Holder pursuant to an effective Registration Statement under
Section 5 of the Securities Act, or (ii) at any time hereafter, such securities
have become freely transferable without restriction under the Securities Act.

                           "Registration" means registration under the
Securities Act of the offering of Registrable Securities pursuant to the
Initial Shelf Registration or a Demand Registration.

                           "Registration Period" shall have the meaning set
forth in Section 2(b).

                           "Registration Statement" means any registration
statement of AIMCO under the Securities Act that covers any of the Registrable
Securities pursuant to the provisions of this Agreement, including the
Prospectus included therein, amendments and supplements to such registration
statement, including pre- and post-effective amendments, all exhibits, and all
material incorporated by reference or deemed to be incorporated by reference in
such registration statement.

                           "SEC" means the Securities and Exchange Commission.

                           "Securities Act" means the Securities Act of 1933,
as amended, and the rules and regulations of the SEC promulgated thereunder.

                           "Shelf Registration" means the registration under
the Securities Act of the offering of Registrable Securities on a delayed or
continuous basis pursuant to Rule 415 under the Securities Act (or any similar
rule that may be adopted by the SEC).

                           "Shelf Registration Statement" means a Registration
Statement intended to effect a Shelf Registration.

                           "underwritten registration or underwritten offering"
means a registration under the Securities Act in which securities of AIMCO are
sold to an underwriter for reoffering to the public.



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SECTION 8.  Initial Shelf Registration; Demand Registration.

                                    (a)  As soon as practicable, but in any
event within 90 days after the date hereof, AIMCO shall prepare and file with
the SEC a Shelf Registration Statement on an appropriate form (the "Initial
Shelf Registration").  AIMCO shall include in the Initial Shelf Registration
all Registrable Securities with respect to which a Holder has, not later than
the second day prior to the effectiveness of such Shelf Registration Statement,
given AIMCO written notice of such Holder's intention to sell thereunder.
AIMCO shall use its best efforts to cause such Shelf Registration Statement to
be declared effective by the SEC as soon as possible.  If AIMCO receives
written notice from a Holder after the date on which such Shelf Registration
Statement has become effective that such Holder desires to include additional
Registrable Securities in such Shelf Registration Statement, AIMCO shall use
its best efforts to so include such additional Registrable Securities as
promptly as possible, including, if required, filing an additional registration
statement, either pursuant to Rule 462(b) under the Securities Act or
otherwise, which registration statement shall not be counted towards
determining the number of Demand Registrations to which the Holders are
entitled pursuant to Section 2(b).

                                    (b)  The Holders shall have the right,
during the period (the "Registration Period") commencing on the date hereof and
ending on the third anniversary hereof, by written notice (the "Demand Notice")
given to AIMCO, to request AIMCO to register under and in accordance with the
provisions of the Securities Act all or part of the Registrable Securities
designated by such Holders; provided, that the aggregate number of Registrable
Securities requested to be registered pursuant to any such Demand Notice and
pursuant to all Demand Notices received pursuant to the following sentence
shall be at least 300,000 shares of AIMCO Common Stock.  Upon receipt of any
such Demand Notice, AIMCO will promptly notify all other Holders of the receipt
of such Demand Notice and allow them the opportunity to include Registrable
Securities held by them in the proposed registration by submitting their own
Demand Notice.  The Holders as a group shall be entitled to two Demand
Registrations pursuant to this Section 2(b) unless any such Demand Registration
did not become effective or was not maintained effective for a period (whether
or not continuous) of at least 90 days or such shorter period which shall
terminate when all the Registrable Securities covered by such Demand Registra-
tion have been disposed of pursuant thereto, in which case the Holders, as a
group, will be entitled, in each case to one additional Demand Registration
pursuant hereto.

                                    (c)  Within 20 days of the date on which
AIMCO first receives a Demand Notice pursuant to Section 2(b) hereof, AIMCO
shall file with the SEC a Registration Statement on the appropriate form for
the registration and sale of the total number of Registrable Securities
specified in such Demand Notices in accordance with the intended method or
methods of distribution specified by the Holders in such Demand Notices (a
"Demand Registration").  AIMCO shall use its


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<PAGE>   81



best efforts to cause such Registration Statement to be declared effective by
the SEC within 90 days of the date of AIMCO's earliest receipt of a Demand
Notice.

                                    (d)  AIMCO agrees to use commercially
reasonable efforts to keep any Registration Statement filed pursuant to this
Section 2 continuously effective and usable for the sale of Registrable
Securities (i)(A) in the case of a Shelf Registration, until one year from the
date hereof or, if later, 90 days from the date on which the SEC declares such
Registration Statement effective, and (B) in the case of a Registration that is
not a Shelf Registration, until 90 days from the date on which the SEC declares
such Registration Statement effective, or (ii) until all the Registrable
Securities covered by such Registration Statement have been sold pursuant to
such Registration Statement, if earlier, in either case as such period may be
extended pursuant to this Section 2.  Notwithstanding the foregoing, AIMCO
shall have the right to delay the filing of any Registration Statement
otherwise required to be prepared and filed by AIMCO pursuant to this Section
2, or to suspend the use of any Registration Statement, for a period not in
excess of 60 days (a "Delay Period") if any executive officer of AIMCO
determines that in such executive officer's reasonable judgment and good faith
the registration and distribution of the Registrable Securities covered or to
be covered by such Registration Statement would materially interfere with any
pending financing, acquisition or corporate reorganization or other material
transaction involving AIMCO or any of its subsidiaries or would require
disclosure of any other material corporate development that AIMCO is not
otherwise required to disclose.  AIMCO will promptly give the Holders written
notice of such determination and an approximation of the period of the
anticipated delay; provided, however, that the aggregate number of days
included in all Delay Periods during any consecutive 12 months shall not exceed
the aggregate of (x) 150 days minus (y) the number of days occurring during the
Hold-Back Periods and Interruption Periods during such consecutive 12 months.
Each Holder agrees to cease all disposition efforts under such Registration
Statement with respect to Registrable Securities held by such Holder
immediately upon receipt of notice of the beginning of any Delay Period.  AIMCO
shall provide written notice to the Holders of the end of each Delay Period.
AIMCO shall not be entitled to initiate a Delay Period unless it shall (i) to
the extent permitted by agreements with other security holders of AIMCO,
concurrently prohibit sales by such other security holders under registration
statements covering securities held by such other security holders and (ii)
have in place a policy that prohibits sales of securities of AIMCO by senior
executive officers during such period.  The time period for which AIMCO is
required to maintain the effectiveness of a Registration Statement referred to
above shall be extended by the aggregate number of days of all Delay Periods,
Hold-Back Periods and Interruption Periods affecting such Registration, and
such period and any extension thereof is hereinafter referred to as the
"Effectiveness Period."

                                    (e) AIMCO shall not include any securities
that are not Registrable Securities in any Registration Statement filed
pursuant to this Section 2


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<PAGE>   82



without the prior written consent of the Holders of a majority in number of the
Registrable Securities covered by such Registration Statement.  AIMCO shall not
enter into any agreement granting any person (an "Other Security Holder")
piggyback registration rights that would permit AIMCO securities of such Other
Security Holder (or such Other Security Holder's successors or assigns) to be
included on a Registration Statement filed pursuant to this Section 2 or
granting any Other Security Holder piggyback rights to include such Other
Security Holder's securities in any registration in which the Holders have the
right to include Registrable Securities on a priority basis more favorable to
such Other Security Holder than is provided to the Holders pursuant to Section
3(b).  To AIMCO's knowledge, there are no agreements granting any person the
right to include securities in any registration pursuant to Section 2.

                           (f)  Holders of a majority in number of the
Registrable Securities to be included in a Demand Registration pursuant to this
Section 2 may, at any time prior to the effective date of the Registration
Statement in respect thereof, revoke such request by providing a written notice
to AIMCO to such effect.  The Holders of Registrable Securities who revoke such
request shall reimburse AIMCO for all of its out-of-pocket expenses incurred in
the preparation, filing and processing of the Registration Statement; provided,
however, that, if such revocation was based on AIMCO's failure to comply in any
material respect with its obligations hereunder, such reimbursement shall not
be required.

SECTION 9.  Hold-Back Agreements.

                           During any Effectiveness Period, each Holder having
Registrable Securities covered by the Registration Statement to which such
Effectiveness Period relates shall, if requested by the managing underwriter or
underwriters in an underwritten offering by AIMCO for the account of AIMCO,
agree not to effect any public sale or distribution of any securities of the
same type (including any underlying securities) as the securities being offered
by AIMCO (except as part of such underwritten offering or pursuant to Rule 144
or 145 under the Securities Act), during a period of up to 90 days, beginning
on the effective date of each such underwritten offering (each such period, a
"Hold-Back Period").

SECTION 10.  Registration Procedures.

                           In connection with the registration obligations of
AIMCO pursuant to and in accordance with Section 2 hereof (and subject to
AIMCO's rights under Section 2), AIMCO will use commercially reasonable efforts
to effect such registration to permit the sale of such Registrable Securities
in accordance with the Holders' intended method or methods of disposition
thereof, and pursuant thereto AIMCO shall as expeditiously as possible:



                                      B-7

<PAGE>   83



                                    (a) prepare and file with the SEC a
Registration Statement for the sale of the Registrable Securities on any form
for which AIMCO then qualifies or which counsel for AIMCO shall deem
appropriate in accordance with such Holders' intended method or methods of
distribution thereof and, subject to Section 2(d), use commercially reasonable
efforts to cause such Registration Statement to become effective and remain
effective as provided herein;

                                    (b) prepare and file with the SEC such
amendments (including post-effective amendments) to the Registration Statement,
and such supplements to the Prospectus, as may be required by the rules,
regulations or instructions applicable to the Securities Act during the
applicable period in accordance with the intended methods of disposition
specified by the Holders owning any Registrable Securities covered by such
Registration Statement, make generally available earnings statements satisfying
the provisions of  Section 11(a) of the Securities Act (provided that AIMCO
shall be deemed to have complied with this clause if it has complied with Rule
158 under the Securities Act), and cause the Prospectus as so supplemented to
be filed pursuant to Rule 424 under the Securities Act;

                                    (c) notify the Holders owning any
Registrable Securities covered by such Registration Statement promptly and (if
requested) confirm such notice in writing, (i) when a Prospectus or any
Prospectus supplement or post-effective amendment has been filed, and, with
respect to a Registration Statement or any post-effective amendment, when the
same has become effective, (ii) of any request by the SEC for amendments or
supplements to a Registration Statement or related Prospectus or for additional
information regarding such Holders, (iii) of the issuance by the SEC of any
stop order suspending the effectiveness of a Registration Statement or the
initiation of any proceedings for that purpose, (iv) of the receipt by AIMCO of
any notification with respect to the suspension of the qualification or
exemption from qualification of any of the Registrable Securities for sale in
any jurisdiction or the initiation or threatening of any proceeding for such
purpose, and (v) of the happening of any event that requires the making of any
changes in such Registration Statement, Prospectus or documents incorporated or
deemed to be incorporated therein by reference so that they will not contain
any untrue statement of a material fact or omit to state any material fact
required to be stated therein or necessary to make the statements therein not
misleading;

                                    (d)  use commercially reasonable efforts to
obtain the withdrawal of any order suspending the effectiveness of a
Registration Statement, or the lifting of any suspension of the qualification
or exemption from qualification of any of the Registrable Securities for sale
in any jurisdiction in the United States;

                                    (e)  furnish to the Holders disposing of
Registrable Securities covered by such Registration Statement, counsel for such
Holders and each managing underwriter, if any, without charge, one conformed
copy of the Registration Statement, as declared effective by the SEC, and of
each post-effective amend-


                                      B-8

<PAGE>   84



ment thereto, in each case, including financial statements and schedules and
all exhibits and reports incorporated or deemed to be incorporated therein by
reference; and deliver, without charge, such number of copies of the
preliminary prospectus, any amended preliminary prospectus, each final
Prospectus and any post-effective amendment or supplement thereto, as such
Holder may reasonably request in order to facilitate the disposition of the
Registrable Securities covered by the Registration Statement in conformity with
the requirements of the Securities Act;

                                    (f)  prior to any public offering of
Registrable Securities, use commercially reasonable efforts to register or
qualify such Registrable Securities for offer and sale under the securities or
Blue Sky laws of such jurisdictions in the United States as the Holders
disposing of Registrable Securities covered by the Registration Statement shall
reasonably request in writing;  provided, however, that AIMCO shall in no event
be required to qualify generally to do business as a foreign corporation or as
a dealer in any jurisdiction where it is not at the time so qualified or to
execute or file a general consent to service of process in any such
jurisdiction where it has not theretofore done so or to take any action that
would subject it to general service of process or taxation in any such
jurisdiction where it is not then subject;

                                    (g)  except during any Delay Period, upon
the occurrence of any event contemplated by Section 4(c)(v) above, promptly
file a supplement or post-effective amendment to the Registration Statement or
related Prospectus or any document incorporated or deemed to be incorporated
therein by reference or any other required document so that, as thereafter
delivered to the purchasers of the Registrable Securities being sold
thereunder, such Prospectus will not contain an untrue statement of a material
fact or omit to state any material fact required to be stated therein or
necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading;

                                    (h)  use commercially reasonable efforts to
cause all Registrable Securities covered by the Registration Statement to be
listed on each securities exchange or automated interdealer quotation system,
if any, on which similar securities issued by AIMCO are then listed or quoted;

                                    (i)  on or before the effective date of the
Registration Statement, provide the transfer agent of AIMCO for the
Registrable Securities with printed certificates for the Registrable Securities
in a form eligible for deposit with The Depositary Trust Company;

                                    (j)  if such offering is an underwritten
offering, make available for inspection by any Holder disposing of Registrable
Securities included in such Registration Statement, any underwriter of such
offering, and any attorney, accountant or other agent retained by any such
Holder or underwriter (collectively, the "Inspectors"), all financial and other
records and other information, pertinent


                                      B-9

<PAGE>   85



corporate documents and properties of any of AIMCO and its subsidiaries
(collectively, the "Records"), as shall be reasonably necessary to enable them
to exercise their due diligence responsibility; provided, however, that the
Records that AIMCO determines, in good faith, to be confidential shall not be
disclosed to any Inspector unless (i) such Inspector signs a confidentiality
agreement reasonably satisfactory to AIMCO (which shall permit the disclosure
of such Records in such Registration Statement or the related Prospectus if
necessary to avoid or correct a material misstatement in or material omission
from such Registration Statement or Prospectus), (ii) after consultation with
counsel for the applicable Inspectors, the Holders and AIMCO, the disclosure of
such Records is necessary to avoid or correct a misstatement or omission in
such Registration Statement or (iii) the release of such Records is ordered
pursuant to a subpoena or other order from a court of competent jurisdiction,
provided that each Holder shall, promptly after learning that disclosure of
such Records is sought in a court having jurisdiction, give notice to AIMCO and
allow AIMCO, at AIMCO's expense, to undertake appropriate action to prevent
disclosure of such Records; and

                                    (k)  if such offering is an underwritten
offering, enter into such agreements (including an underwriting agreement in
form, scope and substance as is customary in underwritten offerings) and take
all such other appropriate and reasonable actions requested by the Holders
owning a majority of the Registrable Securities being sold in connection
therewith (including those reasonably requested by the managing underwriters)
in order to expedite or facilitate the disposition of such Registrable
Securities and, in such connection, (i) use its commercially reasonable
efforts to obtain opinions of counsel to AIMCO and updates thereof (which
counsel and opinions (in form, scope and substance) shall be reasonably
satisfactory to the managing underwriters and counsel to the Holders disposing
of Registrable Securities), addressed to each Holder selling Registrable
Securities covered by such Registration Statement and each of the underwriters
as to the matters customarily covered in opinions requested in underwritten
offerings and such other matters as may be reasonably requested by such counsel
and underwriters, (ii) use commercially reasonable efforts to obtain "cold
comfort" letters and updates thereof from the independent certified public
accountants of AIMCO (and, if necessary, any other independent certified public
accountants of any subsidiary of AIMCO or of any business acquired by AIMCO for
which financial statements and financial data are, or are required to be,
included in the Registration Statement), addressed to each Holder selling
Registrable Securities covered by the Registration Statement (unless such
accountants shall be prohibited from so addressing such letters by applicable
standards of the accounting profession) and each of the underwriters, such
letters to be in customary form and covering matters of the type customarily
covered in "cold comfort" letters in connection with underwritten offerings,
and (iii) if requested and if an underwriting agreement is entered into,
provide indemnification provisions and procedures substantially to the effect
set forth in Section 7 hereof with respect to all parties to be indemnified
pursuant to said Section.  The above shall be done at each


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<PAGE>   86



closing under such underwriting or similar agreement, or as and to the extent
required thereunder.

                           With respect to any Registration under Section 2
hereof, AIMCO may require each Holder disposing of Registrable Securities
covered by such Registration to furnish such information regarding the Holder
and such Holder's intended disposition of Registrable Securities as AIMCO may
from time to time reasonably request in writing.  If any such information with
respect to the Holder is not furnished within a reasonable period of time after
receipt of such request, AIMCO may exclude such Holder's Registrable Securities
from such Registration.

                           Upon receipt of any notice from AIMCO of the
happening of any event of the kind described in Section 4(c)(ii), 4(c)(iii),
4(c)(iv) or 4(c)(v) hereof, each Holder shall (i) forthwith discontinue
disposition of any Registrable Securities covered by such Registration
Statement or Prospectus until receipt of the copies of the supplemented or
amended Prospectus contemplated by Section 4(g) hereof, or until such Holder is
advised in writing (the "Advice") by AIMCO that the use of the applicable
Prospectus may be resumed, and has received copies of any amended or
supplemented Prospectus or any additional or supplemental filings which are
incorporated, or deemed to be incorporated, by reference in such Prospectus
(such period during which disposition is discontinued being an "Interruption
Period") and  (ii) if requested by AIMCO, deliver to AIMCO (at the expense of
AIMCO) all copies then in its possession, other than permanent file copies then
in its possession, of the Prospectus covering such Registrable Securities at
the time of receipt of such request.  No Holder shall utilize any material
other than the applicable current preliminary prospectus or Prospectus in
connection with the offering of Registrable Securities pursuant to Section 2
hereunder.

SECTION 11.  Registration Expenses.

                           Whether or not any Registration Statement is filed
or becomes effective, AIMCO shall pay all costs, fees and expenses incident to
AIMCO's performance of or compliance with this Agreement including, without
limitation, (i) all registration and filing fees, including NASD filing fees,
(ii) fees and expenses of compliance with securities or Blue Sky laws,
including reasonable fees and disbursements of counsel in connection therewith,
(iii) printing expenses (including, without limitation, expenses of printing
certificates for Registrable Securities and of printing prospectuses (including
preliminary prospectuses) if the printing of prospectuses is requested by the
Holders or the managing underwriter, if any), (iv) messenger, telephone and
delivery expenses, (v) fees and disbursements of counsel for AIMCO, (vi) fees
and disbursements of all independent certified public accountants of AIMCO
(including, without limitation, expenses of any "cold comfort" letters required
in connection with this Agreement) and all other persons retained by AIMCO in
connection with the Registration Statement, (vii) fees and disbursements (not
in excess of $25,000 per Registration) of one counsel, other than AIMCO's


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<PAGE>   87



counsel, selected to represent all such Holders by Holders owning a majority in
number of the Registrable Securities being registered, (viii) fees and expenses
customarily reimbursed or paid by issuers or selling securityholders on behalf
of underwriters in underwritten offerings (other than any marketing or
distribution expenses) and (ix) all other costs, fees and expenses incident to
AIMCO's performance or compliance with this Agreement.  Notwithstanding the
foregoing, the fees and expenses of any persons (other than fees and
disbursements not in excess of $25,000 per Registration of the counsel selected
by Holders owning a majority in number of the Registrable Securities being
registered) retained by a Holder, and any discounts, commissions or brokers'
fees or fees of similar securities industry professionals and any transfer
taxes relating to the disposition of the Registrable Securities by a Holder,
will be payable by such Holder, and AIMCO will have no obligation to pay any
such amounts.

SECTION 12.  Underwriting Requirements.

                                    (a)  Subject to Section 6(b) hereof, any
Holder shall have the right, by written notice, to specify that it intends to
dispose of Registrable Securities covered by a Registration Statement pursuant
to an underwritten offering.

                                    (b)  In the case of any underwritten
offering pursuant to a Shelf Registration Statement, the Holders selling
securities in such underwritten offering shall select the institution or
institutions that shall manage or lead the offering or placement, subject to
the reasonable satisfaction of AIMCO.  In the case of a Demand Registration in
which an underwritten offering is specified, the Holders selling securities in
such offering shall select the lead manager of such offering or placement,
subject to the reasonable satisfaction of AIMCO, and AIMCO shall select the
second manager of such offering or placement, subject to the reasonable
satisfaction of such Holders.  Any selection or other decision by Holders
pursuant to this paragraph (b) shall be made by the Holders of a majority in
number of the Registrable Securities to be sold pursuant to the applicable
underwritten offering.  No Holder shall be entitled to participate in an
underwritten offering unless and until such Holder has entered into an
underwriting or other agreement with such institution or institutions for such
offering in such form as AIMCO and such institution or institutions shall
determine.

SECTION 13.  Indemnification.

                                    (a)  Indemnification by AIMCO.  AIMCO
shall, without limitation as to time, indemnify and hold harmless, to the full
extent permitted by law, each Holder whose Registrable Securities are covered
by a Registration Statement or Prospectus, the officers, directors and agents
and employees of each of them, each Person who controls each such Holder
(within the meaning of Section 15 of the Securities Act or Section 20 of the
Exchange Act) and the officers, directors, agents and employees of each such
controlling person, to the fullest extent


                                      B-12

<PAGE>   88



lawful, from and against any and all losses, claims, damages, liabilities,
judgment, costs (including, without limitation, costs of preparation and
reasonable attorneys' fees) and expenses (collectively, "Losses"), as incurred,
arising out of or based upon any untrue or alleged untrue statement of a
material fact contained in such Registration Statement or Prospectus or in
any amendment or supplement thereto or in any preliminary prospectus, or
arising out of or based upon any omission or alleged omission of a material
fact required to be stated therein or necessary to make the statements therein
not misleading, except insofar as the same are based upon information
furnished in writing to AIMCO by or on behalf of such Holder expressly for use
therein; provided, however, that AIMCO shall not be liable to any Holder to the
extent that any such Losses arise out of or are based upon an untrue statement
or alleged untrue statement or omission or alleged omission made in any
preliminary prospectus if (i) having previously been furnished by or on behalf
of AIMCO with copies of the Prospectus, such Holder failed to send or deliver a
copy of the Prospectus with or prior to the delivery of written confirmation of
the sale of Registrable Securities by such Holder to the person asserting the
claim from which such Losses arise and (ii) the Prospectus would have corrected
in all material respects such untrue statement or alleged untrue statement or
such omission or alleged omission; and provided, further, that AIMCO shall not
be liable in any such case to the extent that any such Losses arise out of or
are based upon an untrue statement or alleged untrue statement or omission or
alleged omission in the Prospectus, if (x) such untrue statement or alleged
untrue statement, omission or alleged omission is corrected in all material
respects in an amendment or supplement to the Prospectus and (y) having
previously been furnished by or on behalf of AIMCO with copies of the
Prospectus as so amended or supplemented, such Holder failed to deliver such
Prospectus as so amended or supplemented, prior to or concurrently with the
delivery of written confirmation of the sale of Registrable Securities to the
person asserting the claim from which such Losses arise.

                                    (b)  Indemnification by Holder of
Registrable Securities.  In connection with any Registration Statement in which
a Holder is participating, and as a condition to such participation, such
Holder shall (i) furnish to AIMCO in writing such information as AIMCO
reasonably requests for use in connection with any Registration Statement or
Prospectus and (ii) be deemed to have agreed to indemnify, to the full extent
permitted by law, AIMCO, its directors, officers, agents and employees, each
Person who controls AIMCO (within the meaning of Section 15 of the Securities
Act and Section 20 of the Exchange Act), and the directors, officers, agents or
employees of such controlling Persons, from and against all Losses arising out
of or based upon any untrue or alleged untrue statement of a material fact
contained in any Registration Statement or Prospectus or any amendment or
supplement thereto, or any preliminary prospectus, or arising out of or based
upon any omission or alleged omission of a material fact required to be stated
therein or necessary to make the statements therein not misleading, to the
extent, but only to the extent, that such untrue or alleged untrue statement or
omission or alleged omission is based upon any information so furnished in
writing


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<PAGE>   89



by or on behalf of such Holder to AIMCO expressly for use in such Registration
Statement or Prospectus.

                                    (c)  Conduct of Indemnification
Proceedings.  If any Person shall be entitled to indemnity hereunder (an
"indemnified party"), such indemnified party shall give prompt notice to the
party from which such indemnity is sought (the "indemnifying party") of any
claim or of the commencement of any proceeding with respect to which such
indemnified party seeks indemnification or contribution pursuant hereto;
provided, however, that the delay or failure to so notify the indemnifying
party shall not relieve the indemnifying party from any obligation or liability
except to the extent that the indemnifying party has been materially prejudiced
by such delay or failure.  The indemnifying party shall have the right,
exercisable by giving written notice to an indemnified party promptly after the
receipt of written notice from such indemnified party of such claim or
proceeding, to assume, at the indemnifying party's expense, the defense of any
such claim or proceeding, with counsel reasonably satisfactory to such
indemnified party; provided, however, that an indemnified party shall have the
right to employ separate counsel in any such claim or proceeding and to
participate in the defense thereof, but the fees and expenses of such counsel
shall be at the expense of such indemnified party unless:  (l) the indemnifying
party agrees to pay such fees and expenses; (2) the indemnifying party fails
promptly to assume the defense of such claim or proceeding or fails to employ
counsel reasonably satisfactory to such indemnified party; or (3) the named
parties to any proceeding (including impleaded parties) include both such
indemnified party and the indemnifying party, and such indemnified party shall
have been advised by counsel that there may be one or more legal defenses
available to it which are different from or additional to those available to
the indemnifying party (in which case the indemnifying party shall not have the
right to assume the defense of such action on behalf of such indemnified
party); in which case the indemnified party shall have the right to employ
counsel and to assume the defense of such claim or proceeding; provided,
however, that subject to clause (3) above, the indemnifying party shall not, in
connection with any one such claim or proceeding or separate but substantially
similar or related claims or proceedings in the same jurisdiction, arising out
of the same general allegations or circumstances, be liable for the fees and
expenses of more than one firm of attorneys (together with appropriate local
counsel) at any time for all of the indemnified parties, or for fees and
expenses that are not reasonable.  Whether or not such defense is assumed by
the indemnifying party, such indemnified party will not be subject to any
liability for any settlement made without its consent.  The indemnifying party
shall not consent to entry of any judgment or enter into any settlement that
does not include as an unconditional term thereof the giving by the claimant or
plaintiff to such indemnified party of a release, in form and substance
reasonably satisfactory to the indemnified party, from all liability in respect
of such claim or litigation for which such indemnified party would be entitled
to indemnification hereunder.



                                      B-14

<PAGE>   90



                           (d)  Contribution.  If the indemnification
provided for in this Section 7 is unavailable to an indemnified party in
respect of any Losses (other than in accordance with its terms), then each
applicable indemnifying party, in lieu of indemnifying such indemnified party,
shall contribute to the amount paid or payable by such indemnified party as a
result of such Losses, in such proportion as is appropriate to reflect the
relative fault of the indemnifying party, on the one hand, and such indemnified
party, on the other hand, in connection with the actions, statements or
omissions that resulted in such Losses as well as any other relevant equitable
considerations.  The relative fault of such indemnifying party, on the one
hand, and indemnified party, on the other hand, shall be determined by
reference to, among other things, whether any action in question, including any
untrue or alleged untrue statement of a material fact or omission or alleged
omission to state a material fact, has been taken by, or relates to information
supplied by, such indemnifying party or indemnified party, and the parties'
relative intent, knowledge, access to information and opportunity to correct or
prevent any such action, statement or omission.  The amount paid or payable by
a party as a result of any Losses shall be deemed to include any legal or other
fees or expenses incurred by such party in connection with any investigation or
proceeding.

                           The parties hereto agree that it would not be just
and equitable if contribution pursuant to this Section 7(d) were determined by
pro rata allocation or by any other method of allocation that does not take
account of the equitable considerations referred to in the immediately
preceding paragraph.  Notwithstanding the provision of this Section 7(d), an
indemnifying party that is a Holder shall not be required to contribute any
amount which is in excess of the amount by which the total proceeds received by
such Holder from the sale of Registrable Securities (net of all underwriting
discounts and commissions) exceeds the amount of any damages that such
indemnifying party has otherwise been required to pay by reason of such untrue
or alleged untrue statement or omission or alleged omission.  No person guilty
of fraudulent misrepresentation (within the meaning of Section 11(f) of the
Securities Act) shall be entitled to contribution from any Person who was not
guilty of such fraudulent misrepresentation.

SECTION 14.  Miscellaneous.

                           (a)  Notices.  All notices or communications 
hereunder shall be in writing (including facsimile or similar writing),
addressed as follows:



                                      B-15

<PAGE>   91



                        To AIMCO:

                              Apartment Investment and Management Company
                              1873 South Bellaire Street, 17th Floor
                              Denver, CO  80222
                              Attention:  Terry Considine

                        With a copy (which shall not constitute notice) to:

                              Skadden, Arps, Slate, Meagher & Flom, LLP
                              300 South Grand Avenue, Suite 3400       
                              Los Angeles, California  90071           
                              Attention: Rod A. Guerra                 
                              
                        To the Holders at their respective addresses set forth 
on the signature pages hereto.

                        Any such notice or communication shall be deemed given
(i) when made, if made by hand delivery, (ii) one business day after being
deposited with a next-day courier, postage prepaid, or (iii) three business
days after being sent certified or registered mail, return receipt requested,
postage prepaid, in each case addressed as above (or to such other address as
such party may designate in writing from time to time).

                        (b)  Separability.  If any provision of this Agreement
shall be declared to be invalid or unenforceable, in whole or in part, such
invalidity or unenforceability shall not affect the remaining provisions hereof
which shall remain in full force and effect.

                        (c)  Assignment.  This Agreement shall be binding upon
and inure to the benefit of the parties hereto and their respective heirs,
devisees, legatees, legal representatives, successors and assigns.  Except as
set forth herein, neither AIMCO nor any Holder shall assign this Agreement or
any rights or obligations hereunder without the prior written consent of AIMCO
and the other Holders, with respect to an assignment by any Holder, or the
Holders, with respect to an assignment by AIMCO; provided, that no consent of
AIMCO or the other Holders shall be required for the assignment by any Holder
of this Agreement or any of the rights and obligations of such Holder hereunder
to any person described in clause (ii) of the definition of "Holder" to whom
Registrable Securities are transferred by such Holder.

                        (d)  Entire Agreement. This Agreement represents the
entire agreement of the parties and shall supersede any and all previous
contracts, arrangements or understandings between the parties hereto with
respect to the subject matter hereof.


                                      B-16

<PAGE>   92




                        (e)  Amendments and Waivers.  Except as otherwise
provided herein, the provisions of this Agreement may not be amended, modified
or supplemented, and waivers or consents to departures from the provisions
hereof may not be given, unless AIMCO has obtained the written consent of
Holders of at least a majority in number of the Registrable Securities then
outstanding.

                        (f)  Publicity.  The Holders and AIMCO agree that no
public release or announcement concerning the transactions contemplated hereby
shall be issued by either party without the prior consent of the other party,
except to the extent that the Holders or AIMCO is advised by counsel that such
release or announcement is necessary or advisable under applicable law or the
rules or regulations of any securities exchange, in which case the party
required to make the release or announcement shall to the extent practicable
provide the other party with an opportunity to review and comment on such
release or announcement in advance of its issuance.

                        (g)  Expenses.  Whether or not the transactions
contemplated hereby are consummated, except as otherwise provided herein, all
costs and expenses incurred in connection with the execution of this Agreement
shall be paid by the party incurring such costs or expenses, except as
otherwise set forth herein.

                        (h)  Interpretation.  The headings contained in this
Agreement are for reference purposes only and shall not affect in any way the
meaning or interpretation of this Agreement.

                        (i)  Counterparts.  This Agreement may be executed in
two or more counterparts, all of which shall be considered one and the same
agreement, and shall become effective when two or more such counterparts have
been signed by each of the parties and delivered to the other party.

                        (j)   Governing Law.  This Agreement shall be
construed, interpreted, and governed in accordance with the laws of the State
of Maryland, without reference to rules relating to conflicts of law.

                        (k)  Calculation of Time Periods.  Except as otherwise
indicated, all periods of time referred to herein shall include all Saturdays,
Sundays and holidays; provided, that if the date to perform the act or give any
notice with respect to this Agreement shall fall on a day other than a Business
Day, such act or notice may be timely performed or given if performed or given
on the next succeeding Business Day.



                                      B-17

<PAGE>   93



                IN WITNESS WHEREOF, the parties hereto have executed this
Agreement as of the day and year first written above.

                                             AIMCO:

                                             APARTMENT INVESTMENT AND
                                               MANAGEMENT COMPANY




                                             By:
                                                 ------------------------------
                                                 Name:
                                                 Title:

                                             INVESTOR:


                                                 ------------------------------
                                                 Name:

                                                 Address:
                                                         ----------------------

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

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

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

                                      B-18


<PAGE>   94




                                                                     EXHIBIT C-1

                            FORM OF LEGAL OPINION OF
                   SKADDEN, ARPS, SLATE, MEAGHER & FLOM LLP,
                        COUNSEL TO AIMCO AND MERGER SUB

                  1.  Merger Sub has been duly incorporated and each of Merger
Sub and AIMCO Properties, L.P. is validly existing and in good standing under
the laws of the State of Delaware.

                  2.  Merger Sub has the corporate power and corporate
authority to enter into the Agreement and to consummate the transactions
contemplated thereby.  The execution and delivery of the Agreement by Merger
Sub and the consummation of the transactions contemplated thereby have been
duly authorized by all requisite corporate action on the part of Merger Sub.

                  3.  The Agreement has been executed and delivered by Merger
Sub and (assuming it has been duly authorized, executed and delivered by AIMCO
and NHP) is a valid and binding obligation of AIMCO and Merger Sub, enforceable
against AIMCO and Merger Sub in accordance with its terms, except (a) to the
extent that enforcement thereof may be limited by (i) bankruptcy, insolvency,
reorganization, moratorium or other similar laws now or hereafter in effect
relating to creditors' rights generally and (ii) general principles of equity
(regardless of whether enforcement is considered in a proceeding at law or in
equity) and (b) that rights to indemnification thereunder may be limited by
Federal or state securities laws or the policies underlying such laws.

                  4.  Neither the execution and delivery of the Agreement by
AIMCO, nor the consummation by AIMCO of the transactions contemplated thereby,
will (a) violate the Certificate of Incorporation or By-laws of Merger Sub, or
(b) to the best of our knowledge, without having made any independent
investigation, constitute a violation of or a default under any material
contract, agreement or instrument to which AIMCO, Merger Sub or any of their
Material Subsidiaries is subject and which has been specifically identified to
us as material by AIMCO and Merger Sub in connection with rendering such
opinion.  We express no opinion, however, as to whether the execution, delivery
or performance by AIMCO or Merger Sub of the Agreement will constitute a
violation of or a default under any covenant, restriction or provision with
respect to financial ratios or tests or any aspect of the financial condition
or results of operations of AIMCO or Merger Sub.

                  5.  Neither the execution or delivery by AIMCO or Merger Sub
of the Agreement nor the consummation by AIMCO or Merger Sub of the Merger in
accordance with the terms and provisions thereof will violate any Applicable
Law (as hereinafter defined). "Applicable Laws" shall mean those laws, rules
and regu-


                                      C1-1

<PAGE>   95



lations of the State of California, the general corporate law of the State of
Delaware and of the United States of America which, in our experience, are
normally applicable to transactions of the type contemplated by the
Agreement.

                  6.  No Governmental Approval (as hereinafter defined), which
has not been obtained or taken and is not in full force and effect, is required
to authorize or is required in connection with the execution, delivery or
performance of the Agreement by AIMCO or Merger Sub, except that we express no
opinion with regard to the securities or Blue Sky laws of the various states.
"Governmental Approval" means any consent, approval, license, authorization
or validation of, or filing, recording or registration with, any Governmental
Authority pursuant to Applicable Laws.

                  7.  The AIMCO Registration Statement has been declared
effective under the Securities Act and, to the best of our knowledge, no stop
order suspending the effectiveness of the AIMCO Registration Statement or
preventing the use of the Proxy Statement/Prospectus has been issued.

                  8.  [Unless a similar opinion is included as an exhibit in
the AIMCO Registration Statement:] [Commencing with AIMCO's initial taxable
year ended December 31, 1994, AIMCO was organized in conformity with the
requirements for qualification as a real estate investment trust ("REIT") under
the Code, and AIMCO's proposed method of operation, and its actual method of
operation since its formation, will enable it to meet the requirements for
qualification and taxation as a REIT.  The qualification and taxation as a REIT
depends upon AIMCO's ability to meet, through actual annual operating results,
certain requirements, including requirements relating to distribution levels
and diversity of stock ownership, and the various qualification tests imposed
under the Code, the results of which will not be reviewed by us.  Accordingly,
no assurance can be given that the actual results of AIMCO's operation for any
one taxable year will satisfy such requirements.]

                  9.  The Proxy Statement/Prospectus, as of the date it was
mailed to stockholders of AIMCO and as of the date hereof, and the AIMCO
Registration Statement, as of the date of its effectiveness and as of the date
hereof, appeared on its face to be appropriately responsive in all material
respects to the applicable requirements of the Securities Act and the Exchange
Act and the rules and regulations thereunder, except that, in each case, we
express no opinion or belief as to the financial statements, schedules and
other financial data included or incorporated, or deemed to be incorporated, by
reference therein or excluded therefrom or any information to the extent it was
furnished by or relates to NHP, and we do not assume any responsibility for the
accuracy, completeness or fairness of the statements contained in the Proxy
Statement/Prospectus or the AIMCO Registration Statement.



                                      C1-2

<PAGE>   96



                  In addition, we have participated in conferences with
officers and other representatives of AIMCO, representatives of the independent
public accountants of AIMCO, officers and other representatives of NHP,
counsel for NHP and representatives of the independent public accountants of
NHP, at which the contents of the Proxy Statement/Prospectus, the AIMCO
Registration Statement and related matters were discussed and, although we are
not passing upon, and do not assume any responsibility for, the accuracy,
completeness or fairness of the statements contained in the Proxy
Statement/Prospectus or the AIMCO Registration Statement and have made no
independent check or verification thereof, on the basis of the foregoing, no
facts have come to our attention that have led us to believe that, insofar as
it relates to AIMCO, the Proxy Statement/Prospectus, the AIMCO Registration
Statement, in each case, as of its date and the date of the NHP Meeting,
contained or contains an untrue statement of a material fact or omitted or
omits to state any material fact required to be stated therein or necessary to
make the statements therein, in light of the circumstances under which they
were made, not misleading, except that we express no opinion or belief with
respect to the financial statements, schedules and other financial data
included or incorporated, or deemed to be incorporated, by reference in the
Proxy Statement/Prospectus or the AIMCO Registration Statement or the
information included or incorporated, or deemed to be incorporated, by
reference in the Proxy Statement/Prospectus or the AIMCO Registration Statement
to the extent such information was furnished by or relates to NHP.


                                      C1-3

<PAGE>   97




                                                                     EXHIBIT C-2

                            FORM OF LEGAL OPINION OF
                            PIPER & MARBURY L.L.P.,
                           MARYLAND COUNSEL TO AIMCO

                  1.  AIMCO has been duly incorporated and is validly existing
and in good standing under the laws of its jurisdiction of incorporation.

                  2.  AIMCO has the corporate power and corporate authority to
enter into the Agreement and to consummate the transactions contemplated
thereby.  The execution and delivery of the Agreement by AIMCO and the
consummation of the transactions contemplated thereby have been duly authorized
by all requisite corporate action on the part of AIMCO.

                  3.  Assuming the Agreement has been executed and delivered by
an authorized officer of AIMCO, the Agreement has been executed and delivered
by AIMCO.

                  4.  Neither the execution and delivery of the Agreement by
AIMCO, nor the consummation by AIMCO of the transactions contemplated thereby,
will violate the Charter or By-laws of AIMCO.

                  5.  Neither the execution or delivery by AIMCO of the
Agreement nor the consummation by AIMCO of the Merger in accordance with the
terms and provisions thereof will violate any Applicable Law (as hereinafter
defined). "Applicable Laws" shall mean those laws, rules and regulations of the
State of Maryland which, in our experience, are normally applicable to
transactions of the type contemplated by the Agreement.

                  6.  No Governmental Approval (as hereinafter defined), which
has not been obtained or taken and is not in full force and effect, is required
to authorize or is required in connection with the execution, delivery or
performance of the Agreement by AIMCO, except that we express no opinion with
regard to the securities or Blue Sky laws of the various states.  "Governmental
Approval" means any consent, approval, license, authorization or validation of,
or filing, recording or registration with, any Maryland Governmental Authority
pursuant to Applicable Laws.

                  7.  The AIMCO Common Stock to be issued in the Merger has
been duly authorized and, upon issuance in accordance with the Agreement, will
be validly issued, fully paid and nonassessable.



                                      C2-1

<PAGE>   98




                                                                     EXHIBIT D-1

                            FORM OF LEGAL OPINION OF
                          WILMER, CUTLER & PICKERING,
                                 COUNSEL TO NHP

                  1.  NHP and each subsidiary of NHP listed on Schedule A
attached hereto has been duly incorporated and is validly existing and in good
standing under the laws of its respective jurisdiction of incorporation.

                  2.  NHP has the corporate power and corporate authority to
enter into the Agreement and to consummate the transactions contemplated
thereby.  The execution and delivery of the Agreement by NHP and the
consummation of the transactions contemplated thereby have been duly authorized
by all requisite corporate action on the part of NHP.

                  3.  The Agreement has been executed and delivered by NHP and
(assuming it has been duly authorized, executed and delivered by AIMCO and
Merger Sub) is a valid and binding obligation of NHP, enforceable against NHP
in accordance with its terms, except (a) to the extent that enforcement thereof
may be limited by (i) bankruptcy, insolvency, reorganization, moratorium or
other similar laws now or hereafter in effect relating to creditors' rights
generally and (ii) general principles of equity (regardless of whether
enforcement is considered in a proceeding at law or in equity) and (b) that
rights to indemnification thereunder may be limited by Federal or state
securities laws or the policies underlying such laws.

                  4.  Neither the execution and delivery of the Agreement by
NHP, nor the consummation by NHP of the transactions contemplated thereby, will
(a) violate the Certificate of Incorporation or By-laws of NHP, or (b) to the
best of our knowledge, without having made any independent investigation,
constitute a violation of or a default under any material contract, agreement
or instrument to which NHP or any of its Material Subsidiaries is subject and
which has been specifically identified to us as material by NHP in connection
with rendering such opinion.  We express no opinion, however, as to whether the
execution, delivery or performance by NHP of the Agreement will constitute a
violation of or a default under any covenant, restriction or provision with
respect to financial ratios or tests or any aspect of the financial condition
or results of operations of NHP.

                  5.  Neither the execution or delivery by NHP of the Agreement
nor the consummation by NHP of the Merger in accordance with the terms and
provisions thereof will violate any Applicable Law (as hereinafter defined).
"Applicable Laws" shall mean those laws, rules and regulations of the District
of Columbia, the general corporate law of the State of Delaware and of the
United States of America


                                      D1-1

<PAGE>   99



which, in our experience, are normally applicable to transactions of the type
contemplated by the Agreement.

                  6.  No Governmental Approval (as hereinafter defined), which
has not been obtained or taken and is not in full force and effect, is required
to authorize or is required in connection with the execution, delivery or
performance of the Agreement by NHP, except that we express no opinion with
regard to the securities or Blue Sky laws of the various states.  "Governmental
Approval" means any consent, approval, license, authorization or validation
of, or filing, recording or registration with, any Governmental Authority
pursuant to Applicable Laws.

                  7.  The MS Registration Statement has been declared effective
under the Exchange Act and, to the best of our knowledge, no stop order
suspending the effectiveness of the MS Registration Statement or preventing the
use of the Proxy Statement/Prospectus has been issued.

                  8.  Each of the Proxy Statement/Prospectus, as of the date it
was mailed to stockholders of NHP and as of the date hereof, and the MS
Registration Statement, as of the date of its effectiveness and as of the date
hereof, appeared on its face to be appropriately responsive in all material
respects to the applicable requirements of the Securities Act and the Exchange
Act and the rules and regulations thereunder, except that, in each case, we
express no opinion or belief as to the financial statements, schedules and
other financial data included or incorporated, or deemed to be incorporated, by
reference therein or excluded therefrom or any information to the extent it was
furnished by or relates to AIMCO or Merger Sub, and we do not assume any
responsibility for the accuracy, completeness or fairness of the statements
contained in the Proxy Statement/Prospectus or the MS Registration Statement.

                  In addition, we have participated in conferences with
officers and other representatives of NHP, representatives of the independent
public accountants of NHP, officers and other representatives of AIMCO, counsel
for AIMCO and representatives of the independent public accountants of AIMCO,
at which the contents of the Proxy Statement/Prospectus, the MS Registration
Statement and related matters were discussed and, although we are not passing
upon, and do not assume any responsibility for, the accuracy, completeness or
fairness of the statements contained in the Proxy Statement/Prospectus or the
MS Registration Statement and have made no independent check or verification
thereof, on the basis of the foregoing, no facts have come to our attention
that have led us to believe that, insofar as it relates to NHP, the Proxy
Statement/Prospectus or the MS Registration Statement, in each case, as of its
date and the date of the NHP Meeting, contained or contains an untrue statement
of a material fact or omitted or omits to state any material fact required to
be stated therein or necessary to make the statements therein, in light of
the circumstances under which they were made, not misleading, except that we
express no opinion or belief with respect to the financial statements, sched-


                                      D1-2

<PAGE>   100



ules and other financial data included or incorporated, or deemed to be
incorporated, by reference in the Proxy Statement/Prospectus or the MS
Registration Statement or the information included or incorporated, or deemed
to be incorporated, by reference in the Proxy Statement/Prospectus or the MS
Registration Statement to the extent such information was furnished by or
relates to AIMCO or Merger Sub.



                                      D1-3

<PAGE>   101



                                   Schedule A


NHP Management Company
NHP-HG II, Inc.




                                      D1-4

<PAGE>   102



                                                                     EXHIBIT D-2

                            FORM OF LEGAL OPINION OF
                       ARENT FOX KINTNER PLOTKIN & KAHN,
                             SPECIAL COUNSEL TO NHP

                  1.  Neither the execution and delivery of the Agreement by
NHP, nor the consummation by NHP of the Merger, will give to any member of the
Oxford Group (as defined in the Stock Purchase Agreement) any right to
terminate, not renew or amend any of the Oxford Management Contracts (as
defined in the Stock Purchase Agreement) without the consent of NHP or one of
its wholly owned subsidiaries.

                  2.  Neither the execution and delivery of the Agreement by
NHP, nor the consummation by NHP of the Merger, will constitute a violation of
or a default under, any of the Oxford Management Contracts or any other
Contract, agreement or instrument to which (a) NHP or any of its subsidiaries
is a party, and (b) any member of the Oxford Group is party, including, without
limitation, the Stock and Asset Transfer Restrictions Agreement.



                                      D2-1




<PAGE>   1










================================================================================



                                NHP INCORPORATED,

                          NHP FINANCIAL SERVICES, LTD.

                                       AND

                       THE FIRST NATIONAL BANK OF BOSTON,

                                  RIGHTS AGENT



                                RIGHTS AGREEMENT

                           DATED AS OF APRIL 21, 1997


================================================================================



<PAGE>   2



                                TABLE OF CONTENTS
<TABLE>
<CAPTION>
                                                                                                               PAGE

<S>                                                                                                              <C>
                  RECITALS........................................................................................1
                  Section 1.        Certain Definitions...........................................................1
                  Section 2.        Appointment of Rights Agent...................................................3
                  Section 3.        Evidence of Rights............................................................4
                  Section 4.        Effect of Maturity Time.......................................................5
                  Section 5.        Covenants of the Company and the Spin-Off Entity..............................6
                  Section 6.        Record Date...................................................................9
                  Section 7.        Recapitalization of the Spin-Off Entity.......................................9
                  Section 8.        Rights of Action..............................................................9
                  Section 9.        Agreement of Rights Holders...................................................9
                  Section 10.       Right Holder Not Deemed a Spin-Off Entity Shareholder........................10
                  Section 11.       Concerning the Rights Agent..................................................10
                  Section 12.       Merger or Consolidation or Change of Name of Rights Agent....................11
                  Section 13.       Duties of Rights Agent.......................................................11
                  Section 14.       Change of Rights Agent.......................................................13
                  Section 15.       [Intentionally omitted.]  ...................................................14
                  Section 16.       Notice of Certain Events.....................................................14
                  Section 17.       Notices......................................................................14
                  Section 18.       Supplements and Amendments...................................................15
                  Section 19.       Successors; Certain Covenants................................................16
                  Section 20.       Benefits of this Agreement...................................................16
                  Section 21.       Determinations and Actions by the Board of Directors, etc....................16
                  Section 22.       Severability.................................................................17
                  Section 23.       Governing Law................................................................17
                  Section 24.       Counterparts.................................................................17
                  Section 25.       Descriptive Headings.........................................................17
                  EXHIBIT A.....................................................................................A-1
</TABLE>



                                        i

<PAGE>   3



                                RIGHTS AGREEMENT

     This RIGHTS AGREEMENT, dated as of April 21, 1997 (this "Agreement"), is
made and entered into by and between NHP Incorporated, a Delaware corporation
(the "Company"), NHP Financial Services, Ltd., a Delaware corporation (the
"Spin-Off Entity"), and The First National Bank of Boston, a national banking
association (the "Rights Agent").

                                    RECITALS

         WHEREAS, on April 21, 1997, the Board of Directors of the Company
authorized and declared a dividend distribution of one right ("Right") for each
share of Common Stock, par value $.01 per share, of the Company (a "Common
Share") outstanding as of the Close of Business (as hereinafter defined) on May
2, 1997, (the "Record Date"), each Right representing the right to receive, upon
the Company's distribution of shares of common stock of NHP Financial Services,
Ltd., a Delaware corporation (the "Spin-Off Entity"), upon the terms and subject
to the conditions herein set forth, one-third of a Share of the Spin-Off Entity,
and further authorized and directed the issuance of one Right with respect to
each Common Share issued or delivered by the Company (whether originally issued
or delivered from the Company's treasury) after the Record Date but prior to the
Maturity Time (as hereinafter defined).

         NOW THEREFORE, in consideration of the premises and the mutual
agreements herein set forth, the parties hereby agree as follows:

         Section 1. Certain Definitions. For purposes of this Agreement, the
following terms shall have the meanings indicated:

                  (a) "Affiliate" and "Associate" shall have the respective
         meanings ascribed to such terms, in Rule 12b-2 of the General Rules and
         Regulations under the Exchange Act (as hereinafter defined), as in
         effect on the date of this Agreement.

                  (b) "Business Day" shall mean any day other than a Saturday,
         Sunday or a day on which banking institutions in the State of
         Massachusetts (or such other state in which the principal office of the
         Rights Agent is located) are authorized or obligated by law or
         executive order to close.

                  (c) "Close of Business" on any given date shall mean 5:00
         P.M., Eastern time, on such date; provided, however, that if such date
         is not a Business Day it shall mean 5:00 P.M., Eastern time, on the
         next succeeding Business Day.

                  (d) "Common Shares" shall mean the Common Stock, par value 
         $.01 per share, of the Company.

                  (e) "Company" shall mean NHP Incorporated, a Delaware 
         corporation.

                  (f) "Effective Time" shall have the meaning set forth in the 
         Merger Agreement.



<PAGE>   4




                  (g) "Exchange Act" shall mean the Securities Exchange Act of 
         1934, as amended.

                  (h) "Exchange Agent" shall mean the Exchange Agent appointed 
         pursuant to the Merger Agreement.

                  (i) "Maturity Time" shall mean the earlier of the Effective
         Time of the Merger and the Close of Business on December 1, 1997;
         provided, however, that if the distribution of Shares pursuant to
         Section 4 of this Agreement is prohibited by the terms of any agreement
         to which the Company or the Spin-Off Entity is a party as in effect on
         the date of this Agreement and consent to such distribution has not
         been obtained, or if the distribution of Shares requires any
         governmental filing or approval or the effectiveness of any filing in
         order to comply with applicable law, then the Maturity Time shall be
         deferred until such time as any such consent is obtained, any such
         prohibition is no longer in effect and all such filings or approvals
         have been made or obtained or such filings have become effective.

                  (j) "Merger" shall mean the merger of AIMCO/NHP Acquisition
         Corp., a Maryland corporation, with and into the Company pursuant to
         the Merger Agreement.

                  (k) "Merger Agreement" shall mean the Agreement and Plan of
         Merger dated as of April 21, 1997 by and among Apartment Investment and
         Management Company, a Maryland corporation, AIMCO/NHP Acquisition
         Corp., a Delaware corporation, and the Company.

                  (l) "Nasdaq Stock Market" shall have the meaning set forth in
         Rule 4200(v) of the Rules of the National Association of Securities
         Dealers, Inc.

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

                  (n) "Recapitalization" shall mean the action required 
         pursuant to Section 7 of this Agreement.

                  (o) "Registration Statement" shall mean an appropriate
         registration statement (together with all amendments thereto) under the
         Securities Act or the Exchange Act (as the Company determines to be
         appropriate) relating to the distribution of the Shares on the terms
         set forth herein and relating to the reoffering or resale within 30
         days after the distribution of securities acquired pursuant to the
         distribution to the extent requested by any Person who reasonably
         expects to be an Affiliate of the Spin-Off Entity upon completion of
         the distribution and who requests inclusion of Shares it expects to
         hold no


                                       2
<PAGE>   5



         later than five Business Days prior to the effectiveness of the
         Registration Statement, which statement shall be filed with the SEC.

                  (p) "Right" shall have the meaning set forth in the Recitals 
         to this Agreement.

                  (q) "Rights Agent" shall mean The First National Bank of
         Boston unless and until a successor Rights Agent shall have become such
         pursuant to the terms of this Agreement, and thereafter, "Rights Agent"
         shall mean such successor Rights Agent.

                  (r) "SEC" shall mean the Securities and Exchange Commission.

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

                  (t) "Share" shall mean a share of Common Stock, par value $.01
         per share, of the Spin-Off Entity.

                  (u) "Share Registration Date" shall mean the date upon which
         the Registration Statement shall have become effective.

                  (v) "Special Meeting" shall mean the meeting of the 
         shareholders of the Company to consider and vote on the approval of 
         the Merger Agreement.

                  (w) "Spin-Off Entity" shall mean NHP Financial Services, 
         Ltd., a Delaware corporation.

                  (x) "Subsidiary" when used with reference to any Person shall
         mean any corporation or other entity of which a majority of the voting
         power of the voting equity securities or equity interests is owned,
         directly or indirectly, by such Person.

                  (y) "Summary of Rights to Purchase Shares" shall mean the
         Summary of Rights to Purchase Shares, in substantially the form of
         Exhibit A attached hereto.

                  (z) "Transfer Agent" shall mean the transfer agent for Shares
         as appointed by the Spin-Off Entity from time to time.

         Section 2. Appointment of Rights Agent. The Company and the Spin-Off
Entity hereby appoint the Rights Agent to act as agent for the Company and the
Spin-Off Entity, and the holders of the Rights in accordance with the terms and
conditions hereof, and the Rights Agent hereby accepts such appointment and
hereby certifies that it complies with the requirements of the New York Stock
Exchange governing transfer agents and registrars. The Company may from time to
time act as Co-Rights Agent or appoint such Co-Rights Agents as it may deem
necessary or desirable upon ten (10) days prior written notice to the Rights
Agent. The Rights Agent shall have no duty to supervise, and shall in no event
be liable for, the acts or omissions of any such Co-Rights Agent. Any actions
which may be taken by the Rights Agent


                                       3
<PAGE>   6



pursuant to the terms of this Agreement may be taken by any such Co-Rights
Agent. To the extent that any Co-Rights Agent takes any action pursuant to this
Agreement, such Co-Rights Agent shall be entitled to all of the rights and
protections of, and subject to all of the applicable duties and obligations
imposed upon, the Rights Agent pursuant to the terms of this Agreement.

         Section 3.        Evidence of Rights.

         (a) (i) The Rights shall be evidenced by the certificates representing
Common Shares registered in the names of the record holders thereof, (ii) the
Rights shall be transferable only in connection with the transfer of the
underlying Common Shares, and (iii) the surrender for transfer of any
certificates evidencing Common Shares in respect of which Rights have been
issued shall also constitute the transfer of the Rights associated with the
Common Shares evidenced by such certificates.

         (b) On the Record Date or as promptly as practicable thereafter, the
Company shall send a copy of the Summary of Rights by first-class, postage
prepaid mail, to each record holder of Common Shares as of the Close of Business
on the Record Date, at the address of such holder shown on the records of the
Company as of such date. With respect to certificates of Common Shares
outstanding as of the Record Date and until the Maturity Time, the Rights will
be evidenced by such certificates registered in the names of the holders. Until
the Maturity Time, the surrender for transfer of any certificate for Common
Shares outstanding on the Record Date shall also constitute the transfer of the
Rights associated with the Common Shares represented thereby.

         (c) Rights shall be issued by the Company in respect of all Common
Shares issued or delivered by the Company (whether originally issued or
delivered from the Company's treasury) after the Record Date but prior to the
Maturity Time. Certificates evidencing such Common Shares shall have stamped on,
impressed on, printed on, written on or otherwise affixed to them the following
legend or such similar legend as the Company may deem appropriate and as is not
inconsistent with the provisions of this Agreement, or as may be required to
comply with any applicable law or with any rule or regulation made pursuant
thereto or with any rule or regulation of any stock exchange or transaction
reporting system on which the Common Shares may from time to time be listed or
quoted, or to conform to usage:

         This Certificate also evidences and entitles the holder hereof to
         certain Rights as set forth in a Rights Agreement between NHP
         Incorporated, NHP Financial Services, Ltd. and The First National Bank
         of Boston dated as of April 21, 1997 (the "Rights Agreement"), the
         terms of which are hereby incorporated herein by reference and a copy
         of which is on file at the principal executive offices of NHP
         Incorporated. NHP Incorporated will mail to the holder of this
         Certificate a copy of the Rights Agreement without charge promptly
         after receipt of a written request therefor.

With respect to such certificates containing the foregoing legend, the Rights
associated with the Common Shares represented by such certificates shall be
evidenced by such certificates alone,


                                       4
<PAGE>   7



and the surrender for transfer of any such certificate shall also constitute the
transfer of the Rights associated with the Common Shares represented thereby. In
the event that the Company purchases or acquires any Common Shares after the
Record Date, any Rights associated with such Common Shares shall be deemed
canceled and retired so that the Company shall not be entitled to exercise any
Rights associated with the Common Shares which are no longer outstanding.

         Section 4.        Effect of Maturity Time.

         (a) Without any action on the part of a holder of Rights, at the
Maturity Time, all Rights shall no longer be outstanding and shall automatically
cease to exist, and each record holder of Rights shall thereafter cease to have
any rights with respect to such Rights except the right to receive, without
interest, one-third of a Share of the Spin-Off Entity for each Right and cash
for fractional shares of the Spin-Off Entity in accordance with Section 4(b).

         (b) No fractional Shares shall be issued with respect to Rights. All
fractional Shares that a holder of Rights would otherwise be entitled to receive
with respect to the Rights shall be aggregated and, if a fractional share
results from such aggregation, such holder shall be entitled to receive, in lieu
thereof, an amount in cash determined by multiplying (i) the fraction of a Share
to which such holder would otherwise have been entitled by (ii) $9.15. No
interest will be paid or will accrue on any cash paid or payable in lieu of any
fractional Shares.

         (c) Subject to Section 4(d), as soon as reasonably practicable after
the Maturity Time, (i) the Company shall surrender to the Transfer Agent all
certificates it holds for Shares of the Spin-Off Entity along with executed
stock transfer powers and instructions to issue certificates in the names of
holders of record of Rights immediately prior to the Maturity Time (or such
other Person as may be properly designated pursuant to Section 4(e)) in
accordance with Section 4(a) and to deliver such certificates to the Rights
Agent for the benefit of the holders of Rights, (ii) the Spin-Off Entity shall
deposit (or cause to be deposited) with the Rights Agent, for the benefit of
holders of Rights, cash in an amount sufficient to pay the aggregate cash
required to be paid for fractional shares of the Spin-Off Entity pursuant to
Section 4(b), and (iii) the Rights Agent shall mail to each holder of record of
Rights immediately prior to the Maturity Time (or such other Person as may be
properly designated pursuant to Section 4(e)) the certificates for Shares and
cash to which such holder is entitled pursuant to Sections 4(a) and 4(b),
respectively.

         (d) If the Maturity Time shall be the Effective Time, then (i) the
Company may, in lieu of instructing the Transfer Agent to deliver certificates
for Shares to the Rights Agent pursuant to Section 4(c)(i), instruct the
Transfer Agent to deliver certificates for all or some of the Shares to the
Exchange Agent, and instruct the Exchange Agent to deliver certificates for such
Shares upon surrender of certificates for Common Shares in connection with the
Merger, and (ii) the Spin-Off Entity may, in lieu of depositing cash with the
Rights Agent as required pursuant to Section 4(c)(ii), deposit all or some of
the cash with the Exchange Agent to deliver upon surrender of certificates for
Common Shares in connection with the Merger.



                                       5
<PAGE>   8



         (e) The Company may instruct the Transfer Agent to issue certificates
for Shares in the name of a person other than the record holder of Rights, and
the Rights Agent or the Exchange Agent may deliver certificates for Shares and
cash to a person other than the record holder of Rights if, prior to the
Maturity Time, the Company receives (and transmits to the Rights Agent)
instructions to issue Shares in the name of and deliver Shares and cash to
another Person and such instructions are duly signed by the record holder and,
unless such record holder is a financial institution that is a member of the
Securities Transfer Agents Medallion Program (STAMP), the Stock Exchanges'
Medallion Program (SEMP) or the New York Stock Exchange, Inc. Medallion Program
(MSP) (each such entity, an "Eligible Institution"), the signature of the record
holder is guaranteed by an Eligible Institution.

         Section 5. Covenants of the Company and the Spin-Off Entity. The
Company and the Spin-Off Entity (as appropriate) covenant and agree that from
and after the Record Date until the Maturity Time.

         (a) The Company and the Spin-Off Entity shall take all such action as
may be necessary to ensure that all Shares and/or other securities delivered
upon exercise of Rights, at the time of delivery of the certificates for such
securities, shall be duly and validly authorized and issued, fully paid and
nonassessable securities.

         (b) The Company shall pay when due and payable any and all federal and
state transfer taxes and charges that may be payable in respect of the issuance
or delivery of the Shares; provided, however, that the Company shall not be
required to pay any transfer tax or charge which may be payable in respect of
any transfer or delivery of Shares to a Person other than, or the issuance or
delivery of certificates representing Shares in a name other than that of, the
registered holder of the Rights immediately prior to the Maturity Time, or to
issue or deliver any certificates representing Shares until any such tax or
charge shall have been paid (any such tax or charge being payable by the holder
of such Rights at the time of surrender) or until it has been established to the
Company's reasonable satisfaction that no such tax is due.

         (c) The Spin-Off Entity shall, and the Company shall cause the Spin-Off
Entity to, use its best efforts (i) to file on an appropriate form, in
connection with the filing of the proxy statement with respect to the Special
Meeting or otherwise as promptly as practicable, the Registration Statement with
respect to the Shares to be delivered upon maturity of the Rights, (ii) to cause
such Registration Statement to become effective as soon as practicable after
such filing, and (iii) to cause such Registration Statement to remain effective
(with a prospectus at all times meeting the requirements of the Securities Act)
until such time as is necessary to complete the distribution of Shares in
accordance with Section 4 and any reoffering or resale included in the
Registration Statement. The Spin-Off Entity shall also, and the Company shall
also cause the Spin-Off Entity to, take such action as may be appropriate under,
or to ensure compliance with, the securities or "blue sky" laws of the various
states in connection with the distribution of the Shares pursuant to this
Agreement. If the Spin-Off Entity shall determine that a registration statement
should be filed under any state securities laws, the Spin-Off Entity may
temporarily suspend the distribution of the Shares pursuant to this Agreement in
each relevant jurisdiction


                                       6
<PAGE>   9



until such time as a registration statement has been declared effective and,
upon any such suspension, the Spin-Off Entity shall issue a public announcement
stating that the distribution of the Shares pursuant to this Agreement has been
temporarily suspended, as well as a public announcement at such time as the
suspension is no longer in effect. Notwithstanding anything in this Agreement to
the contrary, the Shares shall not be distributed pursuant to this Agreement in
any jurisdiction if the requisite registration or qualification in such
jurisdiction shall not have been effected or such distribution shall not be
permitted under applicable law.

         (d) Notwithstanding anything in this Agreement to the contrary, after
the Record Date, the Company and the Spin-Off Entity shall not, except as
permitted by Section 18 hereof, take (or permit any of their Subsidiaries to
take) any action the purpose of which is to, or if at the time such action is
taken it is reasonably foreseeable that the effect of such action will,
eliminate or otherwise materially diminish the benefits intended to be afforded
by the Rights.

         (e) Notwithstanding anything in this Agreement to the contrary, in the
event that the Company shall consolidate with or merge with or into, any other
Person other than in connection with the Merger, regardless of whether the
Company shall or shall not be the continuing or surviving corporation of such
consolidation or merger, the Maturity Time shall become the date immediately
preceding the date of the effective time or consummation of any such merger or
consolidation. Prior to the effective time or consummation of any such merger or
consolidation, the Spin-Off Entity shall, and the Company shall cause the
Spin-Off Entity to, cause a registration statement to become and remain
effective with respect to the distribution of Shares pursuant to this Agreement.

         (f) The Spin-Off Entity shall, and the Company shall cause the Spin-Off
Entity to, conduct the operations of the Spin-Off Entity in the ordinary and
usual course of business and consistent with past practice and use reasonable
efforts to keep available the services of its present officers and key employees
and preserve the goodwill and business relationships with all Persons having
business relations with it. Without limiting the generality of the foregoing,
and except as otherwise expressly permitted by this Agreement, prior to the
Maturity Time, the Spin- Off Entity shall not, and the Company shall not permit
the Spin-Off Entity to:

         (i)   transfer the assets of the Spin-Off Entity other than in the
               ordinary course of business;

         (ii)  issue, sell, pledge or dispose of, grant or otherwise create, or
               agree to issue, sell, pledge or dispose of, grant or otherwise
               create any capital stock or other equity securities, any debt or
               other securities convertible into or exchangeable for any of its
               capital stock or other equity securities other than in connection
               with a stock dividend, subdivision, combination or
               reclassification or the exercise of options, warrants and other
               rights to acquire securities issued and outstanding as of the
               Record Date except that the Spin-Off Entity may (W) issue options
               (and securities issuable upon exercise of such options) in
               connection with an amendment of outstanding options to acquire
               Common Shares of the Company so that each such


                                       7
<PAGE>   10



               option includes the right to receive the number of Shares that
               would be distributed in connection with Rights that would be
               associated with Common Shares obtainable upon exercise of such
               options, (X) issue options (and Shares obtainable upon exercise
               of such options) to acquire up to an additional 338,000 Shares
               (assuming completion of the Recapitalization), provided that such
               options are issued in connection with an employee stock option
               plan duly adopted by the Spin-Off Entity, (Y) issue an additional
               6,000 Shares (assuming completion of the Recapitalization),
               provided that such Shares are issued only to employees of the
               Spin-Off Entity and (Z) issue or agree to issue Shares for an
               aggregate consideration of $5,000,000 at a price per Share such
               that, if such Shares were issued immediately after the
               Recapitalization, the price paid per Share would be $9.15; or

        (iii)  declare, set aside, make or pay any dividend or other
               distribution, payable in cash, stock (other than Shares),
               property or otherwise, with respect to any of its capital stock
               or other equity securities.

        (g)    The Company shall not:

        (i)    sell, pledge, distribute, dispose of or otherwise transfer and
               shall not agree to sell, pledge, distribute, dispose of or
               otherwise transfer any Shares except pursuant to the Rights; and

        (ii)   issue, sell, pledge or dispose of, grant or otherwise create, or
               agree to issue, sell, pledge or dispose of, grant or otherwise
               create any Common Shares or other equity security to which Rights
               attach, any debt or other securities convertible into or
               exchangeable for Common Shares or any other equity security to
               which Rights attach other than in connection with a stock
               dividend, subdivision, combination or reclassification or the
               exercise of options, warrants and other rights to acquire
               securities issued and outstanding as of the Record Date.

        (h)    The Company and the Spin-Off Entity shall use their best efforts 
to obtain any consent and to make any filings or obtain any approvals necessary 
to distribute the Shares pursuant to Section 4 of this Agreement at or prior to 
the Maturity Time.

         Section 6. Record Date. Each Person in whose name any certificate
representing Shares is issued pursuant to Section 4 shall for all purposes be
deemed to have become the holder of record of the Shares represented thereby on,
and such certificate shall be dated, the Maturity Time; provided, however, that
if the Maturity Time is a date upon which the share transfer books of the
Spin-Off Entity are closed, such Person shall be deemed to have become the
record holder of such securities on, and such certificate shall be dated, the
next succeeding Business Day on which the Share transfer books of the Spin-Off
Entity are open.



                                       8
<PAGE>   11



         Section 7. Recapitalization of the Spin-Off Entity. As soon as
practicable on or after the Maturity Time, the Spin-Off Entity shall, and the
Company shall cause the Spin-Off Entity to, (i) declare a dividend on the Shares
payable in Shares, (ii) subdivide the outstanding Shares or (iii) combine the
outstanding Shares into a smaller number of Shares, to the extent necessary so
that the number of Shares issued and outstanding immediately thereafter is equal
to the number of Rights outstanding; immediately prior to the Maturity Time
divided by three.

         Section 8. Rights of Action. All rights of action in respect of this
Agreement, excepting the rights of action given to the Rights Agent under
Section 11 and Section13 hereof, are vested in the respective registered holders
of the Common Shares; and any registered holder of any Common Shares, without
the consent of the Rights Agent or of the holder of any other Common Shares, may
in his, her or its own behalf and for his, her or its own benefit enforce, and
may institute and maintain any suit, action or proceeding against the Company to
enforce, or otherwise act in respect of, his, her or its right to exercise the
Rights evidenced by such Common Shares in the manner provided in this Agreement.
Without limiting the foregoing or any remedies available to the holders of
Rights, it is specifically acknowledged that the holders of Rights would not
have an adequate remedy at law for any breach of this Agreement and shall be
entitled to specific performance of the obligations under this Agreement, and
injunctive relief against actual or threatened violations of the obligations of
any Person subject to this Agreement. Holders of Rights shall be entitled to
recover the reasonable costs and expenses, including reasonable attorneys fees,
incurred by them in any action to enforce the provisions of this Agreement.

         Section 9. Agreement of Rights Holders. Every holder of a Right by
accepting the same shall be deemed to have consented and agreed with the Company
and the Rights Agent and with every other holder of a Right that:

         (a) Until the Maturity Time, the Rights shall be transferable only in 
connection with the transfer of the Common Shares;

         (b) Except as provided in Section 4(e), the Company and the Rights
Agent may deem and treat the person in whose name the associated Common Share
certificate is registered as the absolute owner thereof and of the Rights
evidenced thereby (notwithstanding any notations of ownership or writing on the
associated Common Share certificate made by anyone other than the Company or the
Rights Agent) for all purposes whatsoever, and neither the Company nor the
Rights Agent shall be affected by any notice to the contrary;

         (c) Such holder expressly waives any right to receive any fractional
Rights and any fractional securities upon maturity of a Right, except as
otherwise provided in Section 4(b) hereof; and

         (d) Notwithstanding anything in this Agreement to the contrary, neither
the Company nor the Rights Agent shall have any liability to any holder of a
Right or other Person as a result of its inability to perform any of its
obligations under this Agreement by reason of any


                                       9
<PAGE>   12



preliminary or permanent injunction or other order, decree or ruling issued by a
court of competent jurisdiction or by a governmental, regulatory or
administrative agency or commission, or any statute, rule, regulation or
executive order promulgated or enacted by any governmental authority,
prohibiting or otherwise restraining performance of such obligation; provided,
however, that the Company shall use its best efforts to have any such order,
decree or ruling lifted or otherwise overturned as soon as possible.

         Section 10. Right Holder Not Deemed a Spin-Off Entity Shareholder. No
holder, as such, of any Right shall be entitled to vote, receive dividends or be
deemed for any purpose the holder of the Shares or any other securities of the
Spin-Off Entity which may at any time be issuable in respect of the Rights, nor
shall anything contained herein be construed to confer upon the holder of any
Right, as such, any of the rights of a shareholder of the Spin-Off Entity or any
right to vote for the election of directors or upon any matter submitted to
shareholders at any meeting thereof, or to give or withhold consent to any
corporate action, or to receive notice of meetings or other actions affecting
shareholders (except as provided in Section 16 hereof), or to receive dividends
or subscription rights, or otherwise, until the Shares shall have been
distributed in accordance with the provisions of this Agreement.

         Section 11. Concerning the Rights Agent.

         (a) The Company agrees to pay to the Rights Agent reasonable
compensation for all services rendered by it hereunder and, from time to time,
on demand of the Rights Agent, its reasonable expenses and counsel fees and
other disbursements incurred in the administration and execution of this
Agreement and the exercise and performance of its duties hereunder. The Company
also agrees to indemnify the Rights Agent for, and to hold it harmless against,
any loss, liability, suit, action, proceeding or expense, incurred without gross
negligence, bad faith or willful misconduct on the part of the Rights Agent, for
anything done or omitted by the Rights Agent in connection with the acceptance
and administration of this Agreement, including the costs and expenses of
defending against any claim of liability arising therefrom, directly or
indirectly. The indemnity provided herein shall survive the distribution of
Shares in respect of the Rights.

         (b) The Rights Agent shall be protected and shall incur no liability
for, or in respect of any action taken, suffered or omitted by it in connection
with, its administration of this Agreement in reliance upon any certificate
evidencing Common Shares or other securities of the Company or certificate
evidencing Shares or other securities of the Spin-Off Entity, instrument of
assignment or transfer, power of attorney, endorsement, affidavit, letter,
notice, direction, consent, certificate, statement, or other paper or document
believed by it to be genuine and to be signed, executed and, where necessary,
verified or acknowledged, by the proper Person or Persons, or otherwise upon the
advice of counsel as set forth in Section 13 hereof.



                                       10
<PAGE>   13



         Section 12. Merger or Consolidation or Change of Name of Rights Agent.
Any corporation into which the Rights Agent or any successor Rights Agent may be
merged or with which it may be consolidated, or any corporation resulting from
any merger or consolidation to which the Rights Agent or any successor Rights
Agent shall be a party, or any corporation succeeding to the stock transfer or
corporate trust business of the Rights Agent or any successor Rights Agent,
shall be the successor to the Rights Agent under this Agreement without the
execution or filing of any paper or any further act on the part of any of the
parties hereto, provided that such corporation would be eligible for appointment
as a successor Rights Agent under the provisions of Section 14 hereof.

         Section 13. Duties of Rights Agent. The Rights Agent undertakes the
duties and obligations imposed by this Agreement upon the following terms and
conditions, by all of which the Company, the Spin-Off Entity and the holders of
Rights, shall be bound:

         (a) The Rights Agent may consult with legal counsel (who may be legal
counsel for the Company), and the opinion of such counsel shall be full and
complete authorization and protection to the Rights Agent as to any action taken
or omitted by it in good faith and in accordance with such opinion.

         (b) Whenever in the performance of its duties under this Agreement the
Rights Agent shall deem it necessary or desirable that any fact or matter be
proved or established by the Company or the Spin-Off Entity prior to taking or
suffering any action hereunder, such fact or matter (unless other evidence in
respect thereof be herein specifically prescribed) may be deemed to be
conclusively proved and established by a certificate signed by any one of the
Chairman of the Board, the President or any Senior Vice President of the Company
or the Spin-Off Entity, as appropriate, and delivered to the Rights Agent; and
such certificate shall be full authorization to the Rights Agent for any action
taken or suffered in good faith by it under the provisions of this Agreement in
reliance upon such certificate.

         (c) The Rights Agent shall be liable hereunder only for its own gross 
negligence, bad faith or willful misconduct.

         (d) The Rights Agent shall not be liable for or by reason of any of the
statements of fact or recitals contained in this Agreement (except its
countersignature thereof) or be required to verify the same, but all such
statements and recitals are and shall be deemed to have been made by the Company
only.

         (e) The Rights Agent shall not be under any responsibility in respect
of the validity of this Agreement or the execution and delivery hereof (except
the due execution and delivery hereof by the Rights Agent); nor shall it be
responsible for any breach by the Company of any covenant or condition contained
in this Agreement, nor shall it be responsible for any adjustment required under
the provisions of Section 7 hereof or responsible for the manner, method or
amount of any such adjustment or the ascertaining of the existence of facts that
would require any such adjustment (except with respect to the maturity of Rights
after actual notice of any such


                                       11
<PAGE>   14



adjustment); nor shall it by any act hereunder be deemed to make any
representation or warranty as to the authorization or reservation of any shares
of stock or other securities to be issued pursuant to this Agreement or as to
whether any shares of stock or other securities will, when issued, be validly
authorized and issued, fully paid and nonassessable.

         (f) The Company and the Spin-Off Entity agree that they will perform,
execute, acknowledge and deliver or cause to be performed, executed,
acknowledged and delivered all such further and other acts, instruments and
assurances as may reasonably be required by the Rights Agent for the carrying
out or performing by the Rights Agent of the provisions of this Agreement.

         (g) The Rights Agent is hereby authorized and directed to accept
instructions with respect to the performance of its duties hereunder from any
one of the Chairman of the Board, the President or any Vice President of the
Company or the Spin-Off Entity, as appropriate, and to apply to such persons for
advice or instructions in connection with its duties, and it shall not be liable
for any action taken or suffered to be taken by it in good faith in accordance
with instructions of any such officer.

         (h) The Rights Agent and any shareholder, director, officer or employee
of the Rights Agent may buy, sell or deal in any of the Rights or other
securities of the Company or the Spin-Off Entity or become pecuniarily
interested in any transaction in which the Company or the Spin-Off Entity may be
interested, or contract with or lend money to the Company or the Spin-Off
Entity or otherwise act as fully and freely as though it were not Rights Agent
under this Agreement. Nothing herein shall preclude the Rights Agent from acting
in any other capacity for the Company, the Spin-Off Entity or for any other
legal entity.

         (i) The Rights Agent may execute and exercise any of the rights or
powers hereby vested in it or perform any duty hereunder either itself or by or
through its attorneys or agents, and the Rights Agent shall not be answerable or
accountable for any act, default, neglect or misconduct of any such attorneys or
agents or for any loss to the Company or the Spin-Off Entity resulting from any
such act, default, neglect or misconduct, provided reasonable care was exercised
in the selection and continued employment thereof. The Rights Agent shall not be
under any duty or responsibility to insure compliance with any applicable
federal or state securities laws in connection with the issuance, transfer or
exchange of Rights.

         (j) No provision of this Agreement shall require the Rights Agent to
expend or risk its own funds or otherwise incur any financial liability in the
performance of any of its duties hereunder or in the exercise of its rights if
there shall be reasonable grounds for believing that repayment of such funds or
adequate indemnification against such risk or liability is not reasonably
assured to it.



                                       12
<PAGE>   15



         Section 14. Change of Rights Agent. The Rights Agent or any successor
Rights Agent may resign and be discharged from its duties under this Agreement
upon 30 calendar days' notice in writing mailed to the Company, the Spin-Off
Entity and to each transfer agent of the Common Shares and Shares by registered
or certified mail, and to the holders of the Rights by first-class mail. The
Company may remove the Rights Agent or any successor Rights Agent upon 30
calendar days' notice in writing, mailed to the Rights Agent or successor Rights
Agent, as the case may be, and to each transfer agent of the Common Shares and
Shares by registered or certified mail, and to the holders of the Rights by
first-class mail. If the Rights Agent shall resign or be removed or shall
otherwise become incapable of acting, the Company shall appoint a successor
Rights Agent. If the Company shall fail to make such appointment within a period
of 30 calendar days after giving notice of such removal or after it has been
notified in writing of such resignation or incapacity by the resigning or
incapacitated Rights Agent, then the registered holder of any Rights may apply
to any court of competent jurisdiction for the appointment of a new Rights
Agent. Any successor Rights Agent, whether appointed by the Company or by such a
court, shall be a corporation organized and doing business under the laws of the
United States or of any other state of the United States so long as such
corporation is in good standing and is authorized under such laws to exercise
corporate trust or stock transfer powers and is subject to supervision or
examination by federal or state authority and which has at the time of its
appointment as successor Rights Agent a combined capital and surplus of at least
$50 million. After appointment, the successor Rights Agent shall be vested with
the same powers, rights, duties and responsibilities as if it had been
originally named as Rights Agent without further act or deed; but the
predecessor Rights Agent shall deliver and transfer to the successor Rights
Agent any property at the time held by it hereunder, and execute and deliver any
further assurance, conveyance, act or deed necessary for the purpose. Not later
than the effective date of any such appointment, the Company shall file notice
thereof in writing with the predecessor Rights Agent and each transfer agent of
the Common Shares and the Shares, and mail a notice thereof in writing to the
registered holders of the Rights. Failure to give any notice provided for in
this Section 14, however, or any defect therein, shall not affect the legality
or validity of the resignation or removal of the Rights Agent or the appointment
of the successor Rights Agent, as the case may be.

         Section 15. [Intentionally omitted.]

         Section 16. Notice of Certain Events.

         (a) In case, after the Record Date, the Company or the Spin-Off Entity
shall propose (i) to pay any dividend payable in stock of any class to the
holders of Shares or to make any other distribution to the holders of Shares
(other than a regular periodic cash dividend), (ii) to offer to the holders of
Shares rights, options or warrants to subscribe for or to purchase any
additional Shares or shares of stock of any class or any other securities,
rights or options, (iii) to effect any reclassification of its Shares (other
than a reclassification involving only the subdivision of outstanding Shares),
(iv) to effect any consolidation or merger (other than the Merger) into or with,
or to effect any sale or other transfer (or to permit one or more of its
Subsidiaries to effect any sale or other transfer), in one or more transactions,
of assets or earning


                                       13
<PAGE>   16



power (including, without limitation, securities creating any obligation on the
part of the Company and/or any of its Subsidiaries) representing more than 50%
of the assets and earning power of the Company and its Subsidiaries, taken as a
whole, to any other Person or Persons, or (v) to effect the liquidation,
dissolution or winding up of the Company, then, in each such case, the Company
shall give to each holder of a Right, in accordance with Section 17 hereof, a
notice of such proposed action, which shall specify the record date for the
purposes of such stock dividend, distribution or offering of rights, options or
warrants, or the date on which such reclassification, consolidation, merger,
share exchange, sale, transfer, liquidation, dissolution, or winding up is to
take place and the date of participation therein by the holders of the Shares,
if any such date is to be fixed, and such notice shall be so given, in the case
of any action covered by clause (i) or (ii) above, at least 10 calendar days
prior to the record date for determining holders of the Common Shares for
purposes of such action, and, in the case of any such other action, at least 10
calendar days prior to the date of the taking of such proposed action or the
date of participation therein by the holders of the Common Shares, whichever
shall be the earlier.

         (b) Upon the occurrence of the Special Meeting or the termination of
the Merger Agreement, the Company shall as soon as practicable thereafter, make
a public announcement and give to the Rights Agent and each holder of a Right,
in accordance with Section 17 hereof, a notice of the occurrence of such event,
which announcement and notice shall specify the results of the vote on the
approval of the Merger Agreement or the fact of the termination of the Merger
Agreement, and the consequences of the event to holders of Rights; provided that
no notice need be given if the Maturity Time is expected to occur within 10
Business Days of the occurrence of the Special Meeting.

         Section 17.       Notices.

         (a) Notices or demands authorized by this Agreement to be given or made
by the Rights Agent or by the holder of any Right to or on the Company shall be
sufficiently given or made if sent by first-class mail, postage prepaid,
addressed (until another address is filed in writing with the Rights Agent) as
follows:

                           NHP Incorporated
                           8065 Leesburg Pike
                           Suite 400
                           Vienna, Virginia  22182-2738
                           Attention:  President and Chief Executive Officer

         (b) Notices or demands authorized by this Agreement to be given or made
by the Rights Agent or by the holder of any Right to or on the Spin-Off Entity
shall be sufficiently given or made if sent by first-class mail, postage
prepaid, addressed (until another address is filed in writing with the Rights
Agent) as follows:

                           NHP Financial Services, Ltd.
                           1593 Spring Hill Road, Suite 400


                                       14
<PAGE>   17



                           Vienna, Virginia  22182
                           Attention:  President and Chief Executive Officer

         (c) Subject to the provisions of Section 14 hereof, any notice or
demand authorized by this Agreement to be given or made by the Company or the
Spin-Off Entity, or by the holder of any Right to or on the Rights Agent shall
be sufficiently given or made if sent by first-class mail, postage prepaid,
addressed (until another address is filed in writing with the Company) as
follows:

                           The First National Bank of Boston
                           c/o Boston Equiserve
                           150 Royall Street
                           Canton, Massachusetts  02021
                           Attention:  Stacy Seremetis

         (d) Notices or demands authorized by this Agreement to be given or made
by the Company, the Spin-Off Entity or the Rights Agent to the holder of any
Right certificate evidencing Common Shares shall be sufficiently given or made
if sent by first-class mail, postage prepaid, addressed to such holder at the
address of such holder as shown on the registry books of the Company.

         Section 18. Supplements and Amendments. Subject to the last sentence of
this Section 18, if the Company so directs, the Company and the Rights Agent
shall supplement or amend this Agreement without the approval of any holders of
Rights (i) to cure any ambiguity, (ii) to correct or supplement any provision
contained herein which may be defective or inconsistent with any other
provisions herein, (iii) to shorten or lengthen any time period hereunder, or
(iv) to supplement or amend the provisions hereunder in any manner which the
Company may deem desirable, which supplement or amendment shall not, in the good
faith determination of the Board of Directors of the Company, adversely affect
the interests of the holders of Rights (so long as the duties, liabilities and
indemnifications of the Rights Agent are not affected). Upon the delivery of a
certificate from an officer of the Company which states that the proposed
supplement or Amendment is in compliance with the terms of this Section 18, the
Rights Agent shall execute such supplement or amendment; provided, however, that
the failure or refusal of the Rights Agent to execute such supplement or
amendment shall not affect the validity of any supplement or amendment adopted
by the Company, any of which shall be effective in accordance with the terms
thereof. Notwithstanding anything in this Agreement to the contrary, no
supplement or Amendment shall be made which increases the period of time
remaining until the Maturity Time or terminates the Rights or makes the Rights
subject to redemption without the consent of the holders of a majority of the
issued and outstanding Rights, and this Agreement may be amended in any respect
upon the agreement of the Company, the Spin-Off Entity and the Rights Agent if
the consent of the holders of a majority of the issued and outstanding Rights
has been obtained with respect to such amendment.



                                       15
<PAGE>   18



         Section 19. Successors; Certain Covenants. All the covenants and
provisions of this Agreement by or for the benefit of the Company, the Spin-Off
Entity or the Rights Agent shall bind and inure to the benefit of their
respective successors and assigns hereunder.

         Section 20. Benefits of this Agreement. Nothing in this Agreement shall
be construed to give to any Person other than the Company, the Spin-Off Entity,
the Rights Agent and the holders of the Rights any legal or equitable right,
remedy or claim under this Agreement; but this Agreement shall be for the sole
and exclusive benefit of the Company, the Spin-Off Entity, the Rights Agent and
the holders of the Rights.

         Section 21. Determinations and Actions by the Board of Directors, etc.
The Board of Directors of the Company shall have the exclusive power and
authority to administer this Agreement and to exercise all rights and powers
specifically granted to the Board, or the Company, or as may be necessary or
advisable in the administration of this Agreement, including, without
limitation, the right and power to (i) interpret the provisions of this
Agreement, and (ii) make all determinations deemed necessary or advisable for
the administration of this Agreement (including, without limitation, to amend
the Agreement and whether any proposed amendment adversely affects the interests
of the holders of Rights). For all purposes of this Agreement, any calculation
of the number of Shares or Common Shares or other securities outstanding at any
particular time shall be made in accordance with the last sentence of Rule
l3d-3(d)(l)(i) under the Exchange Act as in effect on the date of this
Agreement. All such actions, calculations, interpretations and determinations
(including, for purposes of clause (y) below, all omissions with respect to the
foregoing) which are done or made by the Board of Directors of the Company in
good faith, shall (x) be final, conclusive and binding on the Company, the
Rights Agent, the holders of the Rights and all other parties, and (y) not
subject the Board of Directors of the Company to any liability to the holders of
the Rights.

         Section 22. Severability. If any term, provision, covenant or
restriction of this Agreement is held by a court of competent jurisdiction or
other authority to be invalid, void or unenforceable, the remainder of the
terms, provisions, covenants and restrictions of this Agreement shall remain in
full force and effect and shall in no way be affected, impaired or invalidated.

         Section 23. Governing Law. This Agreement and each Right Certificate
issued hereunder shall be deemed to be a contract made under the internal
substantive laws of the State of Delaware and for all purposes shall be governed
by and construed in accordance with the internal substantive laws of such State
applicable to contracts to be made and performed entirely within such State.



                                       16
<PAGE>   19



         Section 24. Counterparts.  This Agreement may be executed in any number
of counterparts and each of such counterparts shall for all purposes be deemed 
to be an original, and all such counterparts shall together constitute but one 
and the same instrument.

         Section 25. Descriptive Headings.  Descriptive headings of the several 
Sections of this Agreement are inserted for convenience only and shall not 
control or affect the meaning or construction of any of the provisions hereof.

                  [Remainder of page left intentionally blank.]


                                       17
<PAGE>   20




         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed and their respective corporate seals to be hereunto affixed and
attested, all as of the day and year first above written.



<TABLE>
[SEAL]
<S>                                                            <C> 
Attest:
                                                                   NHP INCORPORATED


  /s/ Joel F. Bonder                                                 /s/ J. Roderick Heller, III
- --------------------                                               -----------------------------
Joel F. Bonder                                                     J. Roderick Heller, III
Senior Vice President, Secretary and                               Chairman, President and
  General Counsel                                                    Chief Executive Officer


[SEAL]
Attest:
                                                                   NHP FINANCIAL SERVICES, LTD.


  /s/ Mildred C. Banks                                               /s/ J. Roderick Heller, III
- ----------------------                                             -----------------------------
Mildred C. Banks                                                   J. Roderick Heller, III
Assistant Secretary                                                Chairman of the Board




[SEAL]
Attest:
                                                                   THE FIRST NATIONAL
                                                                   BANK OF BOSTON


  /s/ Jeff Seiders                                                   /s/ Colleen H. Shea
- ------------------                                                 ---------------------
Jeff Seiders                                                       Colleen H. Shea
Account Administrator                                              Administration Manager
</TABLE>





                                       18
<PAGE>   21



                                                                       EXHIBIT A

                              SUMMARY OF RIGHTS TO
                     SHARES OF NHP FINANCIAL SERVICES, LTD.


                  The Board of Directors of NHP Incorporated (the "Company")
has declared a dividend distribution of one right (a "Right") for each
outstanding share of common stock, par value $.01 per share (the "Common
Shares"), of the Company. The distribution is payable on May 9, 1997 to the
shareholders of record as of the close of business on the Record Date. Each
Right entitles the registered holder to receive from the Company upon maturity
of the Rights one-third of a share (the "Shares") of common stock, par value
$.01 per share, of NHP Financial Services, Ltd., a Delaware corporation (the
"Spin-Off Entity"), or any successor thereof, subject to the terms and
conditions set forth in a Rights Agreement, dated as of April 21, 1997 (the
"Rights Agreement"), between the Company, the Spin-Off Entity and The First
National Bank of Boston as Rights Agent (the "Rights Agent"). No fractional
Shares will be issued and cash will be paid in lieu of fractional Shares at the
rate of $9.15 per Share. The distribution of Shares pursuant to the Rights will
result in 100% of the equity of the Spin-Off Entity being distributed to the
holders of Rights. Rights will also be issued with respect to any Common Share
issued prior to the time Shares become distributable in respect of Rights.

                  The Rights Agreement provides that the right to receive the
Shares shall not mature until the earlier of the Effective Time of the merger
(the "Merger") of a subsidiary of Apartment Investment and Management Company
("AIMCO") with and into the Company pursuant to an Agreement and Plan of Merger
dated as of April 21, 1997 by and among AIMCO, such subsidiary and the Company
(the "Merger Agreement") or December 1, 1997 (the time at which the Rights
mature being referred to as the "Maturity Time").

                  The Rights will be evidenced, with respect to any of the
Common Share certificates outstanding as of the Record Date, by such Common
Share certificates. Until the Maturity Time new Common Share certificates issued
after the Record Date upon transfer or new issuance of Common Shares will
contain a notation incorporating the Rights Agreement by reference. Until the
Maturity Time, the surrender for transfer of any certificates for Common Shares
will also constitute the transfer of the Rights associated with the Common
Shares represented by such certificates.

                  The Rights Agreement also contains certain covenants of the
Company and the Spin-Off Entity proscribing the following while the Rights are
outstanding: (i) a transfer of the assets of the Spin-Off Entity other than in
the ordinary course of business; (ii) issuance of securities by the Company
other than in connection with a stock dividend, subdivision, combination or
reclassification or the exercise of options, warrants and other rights to
acquire securities issued and outstanding as of the Record Date; (iii) issuance
of securities by the Spin-Off Entity other than in connection with a stock
dividend, subdivision, combination or reclassification or the exercise of
options, warrants and other rights to acquire securities issued

                                       A-1

<PAGE>   22


and outstanding as of the Record Date plus (W) the Spin-Off Entity may issue
options (and securities issuable upon exercise of such options) in connection
with an amendment of outstanding options to acquire Common Shares of the Company
so that each such option includes the right to receive the number of Shares that
would be distributed in connection with Rights that would be associated with
Common Shares obtainable upon exercise of such options, (X) the Spin-Off Entity
may issue options (and Shares obtainable upon exercise of such options) to
acquire up to an additional 338,000 Shares (assuming completion of the
Recapitalization contemplated by the Rights Agreement), provided that such
options are issued in connection with an employee stock option plan duly adopted
by the Spin-Off Entity, (Y) the Spin-Off Entity may issue an additional 6,000
Shares (assuming completion of the Recapitalization contemplated by the Rights
Agreement), provided that such Shares are issued only to employees of the Spin-
Off Entity and (Z) issue or agree to issue Shares for an aggregate consideration
of $5,000,000 at a price expected to be $9.15 per Share (assuming completion of
the Recapitalization contemplated by the Rights Agreement); and (iv) the
operation of the Spin-Off Entity otherwise than in the ordinary course of
business.

                  The Rights Agreement may be amended by the Company without the
approval of any holders of Right Certificates in certain events, including
amendments which add other events requiring adjustment to the number of Shares
or other securities issuable upon the exercise of the Rights provided that no
amendment may be made which (i) changes the number of Shares that may be
distributed in any way that results in less than all Shares held by the Company
at the Maturity Time being distributed in respect of the Rights, or (ii)
increases the period of time remaining until the Maturity Time, without the
consent of the holders of a majority of the issued and outstanding Rights, and
the Rights Agreement may be amended in any respect upon the agreement of the
Company, the Spin-Off Entity and the Rights Agent if the consent of the holders
of a majority of the issued and outstanding Rights has been obtained with
respect to such amendment.

                  A copy of the Rights Agreement has been filed with the
Securities and Exchange Commission as an Exhibit to a Registration Statement on
Form 8-A. A copy of the Rights Agreement is available free of charge from the
Company. This summary description of the Rights is as of April 21, 1997, does
not purport to be complete and is qualified in its entirety by reference to the
Rights Agreement, which is incorporated herein by this reference.


                                       A-2




<PAGE>   1
                                [NHP LETTERHEAD]



               NHP AND AIMCO ANNOUNCE DEFINITIVE MERGER AGREEMENT;
                      NHP ANNOUNCES DISTRIBUTION OF RIGHTS

[NHP LOGO]                                           Contact: Ann Torre Grant
                                                              EVP and CFO
                                                              (703) 394-2420
                                                              [email protected]

VIENNA, VA, APRIL 21, 1997/PRNewswire/--NHP Incorporated (NHP) (NHPI -- Nasdaq)
of Vienna, VA announced today that it has entered into a definitive Merger
Agreement pursuant to which NHP will be acquired by Apartment Investment and
Management Company (AIMCO). Upon completion of the merger, each stockholder of
NHP will receive for each share of NHP common stock, at the stockholder's
election, either (i) a combination of .37383 shares of AIMCO common and $10.00
cash per share of NHP common stock, or (ii) .74766 shares of AIMCO common stock.
The merger is conditioned on the approval of NHP stockholders and AIMCO
stockholders, the completion of the transactions between AIMCO and the majority
stockholders of NHP described below, and customary state and federal regulatory
and other approvals. Donaldson, Lufkin & Jenrette acted as financial advisor to
a committee of independent directors of the Board of Directors of NHP in
connection with the merger.

AIMCO has separately entered into a Stock Purchase Agreement with Demeter
Holdings Corporation (Demeter) and Capricorn Investors, L.P. (Capricorn), who
together hold a majority of the outstanding shares of NHP common stock. Pursuant
to the Stock Purchase Agreement, AIMCO will acquire all of the NHP common stock
currently held by Demeter and Capricorn. AIMCO will pay Demeter $20 in cash per
share for 50% of the NHP shares held directly and indirectly by Demeter. For the
remainder of Demeter's shares and Capricorn's shares, AIMCO will pay .74766
shares of AIMCO common stock per share of NHP common stock. The closing under
the Stock Purchase Agreement is expected to occur in May 1997. Upon completion
of AIMCO's purchase of shares held by Demeter and Capricorn, AIMCO will hold a
majority of the issued and outstanding shares of NHP common stock. The merger
with NHP will, however, require two-thirds of all shares of NHP common stock
held by persons other than AIMCO. Stockholder meetings to approve the merger are
expected to be held in late summer.

NHP has also been informed that AIMCO is negotiating a definitive agreement with
Demeter and Capricorn to acquire interests in certain real estate properties
owned or controlled by NHP Partners, Inc., which is controlled by Demeter and
Capricorn, most of which properties are managed by NHP pursuant to a long-term
property management contract. Both NHP's and AIMCO's obligations to complete the
merger are conditioned on signing the definitive agreement relating to the sale
of real estate interests and the agreement remaining in effect. As consideration
for AIMCO's executing the Merger




<PAGE>   2


Agreement, NHP has waived, effective May 3, 1997, its right of first refusal to
purchase the real estate being sold to AIMCO, subject to the condition that a
definitive real estate agreement be signed by AIMCO and Demeter by May 31 on
terms substantially in accordance with those described to NHP's Board of
Directors.

NHP also announced that it will issue to its stockholders rights to receive a
distribution of all of the common stock of NHP Financial Services, Ltd. (NHP
Financial) owned by NHP. NHP Financial is a holding company for Washington
Mortgage Financial Group, Ltd., which is engaged in the business of commercial
mortgage banking. The rights will provide for the issuance of one-third of a
share of NHP Financial for each share of NHP common stock at the earlier of the
time of the AIMCO merger, or on December 1, 1997, if the merger has not occurred
by that date. NHP Financial is currently a wholly owned subsidiary of NHP, but
NHP Financial is expected to issue shares constituting approximately 11.5% of
its common equity in a private transaction on or shortly after the distribution
to NHP stockholders. NHP has received a commitment, subject to certain
conditions, to purchase 546,498 shares of NHP Financial for an aggregate
purchase price of $5 million on or shortly after the distribution, which is
equivalent to $9.15. The distribution is also conditioned on the consent of
lenders under NHP's credit agreement. As a result of the distribution, each
holder of shares of NHP common stock at the time of the AIMCO merger will
receive the merger consideration described above plus shares in NHP Financial.

Pursuant to the Stock Purchase Agreement with AIMCO, Demeter and Capricorn will
receive the shares of NHP Financial they would have received if the distribution
had occurred prior to the transfer of their NHP shares to AIMCO. The rights will
be distributed approximately May 9 to stockholders of record of NHP on May 2,
1997.

NHP provides a broad array of real estate services including property management
of over 135,000 apartments nationwide, asset management, equity investments,
mortgage financing and servicing through NHP Financial, as well as a growing
group of related services including group purchasing, risk management and home
health care. NHP went public in August, 1995 at $13 per share.


RELEASE 97-8



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