HMC MERGER CORP
8-A12B, 1998-12-11
HOTELS & MOTELS
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<PAGE>
 
================================================================================

                      SECURITIES AND EXCHANGE COMMISSION

                            WASHINGTON, D.C.  20549

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

                                   FORM 8-A

               FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                   PURSUANT TO SECTION 12(b) OR 12(g) OF THE
                        SECURITIES EXCHANGE ACT OF 1934

                            HMC MERGER CORPORATION
            (Exact Name of Registrant as Specified in Its Charter)

<TABLE>
<S>                                                         <C>
                        MARYLAND                                                     53-0085950
        (State of Incorporation of Organization)                       (I.R.S. Employer Indemnification no.)       

                   10400 FERNWOOD ROAD 
                   BETHESDA, MARYLAND                                                   20817
        (Address of Principal Executive Offices)                                      (Zip Code)

If this form relates to the registration of a class of      If this form relates to the registration of a class of
securities pursuant to Section 12(b) of the Exchange Act    securities pursuant to Section 12(g) of the Exchange Act and
and is effective pursuant to General Instruction A.(c),     is effective pursuant to General Instruction A.(d), please
please check the following box. [x]                         check the following box. [ ]

</TABLE> 

Securities Act registration statement file number to which this
form relates: _______________________
                 (If applicable)

Securities to be registered pursuant to Section 12(b) of the Act:

          Title of Each Class                Name of Each Exchange on Which
          to be so Registered                Each Class is to be Registered
          -------------------                ------------------------------
     Preferred Stock Purchase Rights         Midwest Stock Exchange, Inc.
                                             New York Stock Exchange, Inc.
                                             Pacific Stock Exchange, Inc.
                                             Philadelphia Stock Exchange, Inc.

Securities to be registered pursuant to Section 12(g) of the Act:

                                      None
                                (Title of Class)

================================================================================
<PAGE>
 
ITEM 1.   DESCRIPTION OF REGISTRANT'S SECURITIES TO BE REGISTERED.

          On November 23, 1998, the Board of Directors of HMC Merger Corporation
(the "Company") declared a dividend distribution of one right ("Right") for each
outstanding share of common stock (the "Common Stock") of the Company.  The
distribution is payable to stockholders of record on December 7, 1998.  Each
Right, when exercisable, entitles the registered holder to purchase from the
Company one one-thousandth of a share of Series A Junior Participating Preferred
Stock ("Preferred Stock") at a price of $55.00 per one one-thousandth share (the
"Purchase Price"), subject to adjustment.  The description and terms of the
Rights are set forth in a Rights Agreement (the "Rights Agreement") between the
Company and The Bank of New York, as Rights Agent (the "Rights Agent").

          Initially, the Rights will be attached to all certificates
representing shares of Common Stock then outstanding, and no separate
certificates evidencing the Rights will be distributed.  The Rights will
separate from the Common Stock and a distribution of Rights Certificates (as
defined below) will occur upon the earlier to occur of (i) 10 days following a
public announcement that a person or group of affiliated or associated persons
(an "Acquiring Person") has acquired, or obtained the right to acquire,
beneficial ownership of 20% or more of the outstanding shares of Common Stock
(the "Stock Acquisition Date"), or (ii) 10 business days (or such later date as
the Board of Directors may determine) following the commencement of a tender
offer or exchange offer the consummation of which would result in the beneficial
ownership by a person of 20% or more of the outstanding shares of Common Stock
(the earlier of such dates being called the "Distribution Date").  For purposes
of the Rights Agreement, a person is not deemed to beneficially own "Exempt
Shares," which are defined in the Rights Agreement as (i) shares of Common Stock
that are received pursuant to the Agreement and Plan of Merger dated as of
November 23, 1998, by and among the Company, Host Marriott Corporation ("Host
Marriott") and Host Marriott, L.P. (the "Merger Agreement"), in exchange for
shares of common stock, par value $1.00 per share of Host Marriott Corporation
which such person beneficially owned on February 3, 1989, and owned continuously
thereafter until the Merger (as defined in the Merger Agreement), (ii) shares of
Common Stock which were acquired by a person pursuant to a gift, bequest,
inheritance or distribution from a trust or from a corporation controlled by
such person, where such shares of Common Stock were Exempt Shares prior to such
acquisition, and where such shares were beneficially owned by such person
continuously after such acquisition, (iii) shares of Common Stock acquired by
such person as a result of a stock dividend, stock distribution or other
recapitalization, in respect of Exempt Shares only, whereby any Common Stock
received by such person is substantially proportional to the amount of Common
Stock owned by such person prior to such transaction and where such Common Stock
is beneficially owned by such person continuously thereafter, (iv) shares of
Common Stock acquired by such person as a result of such person becoming a
beneficial owner pursuant solely to clauses (ii) and (iii) above by any other
person, and (v) shares of Common Stock acquired by a person as a result of the
exercise of the purchase right granted to Marriott International, Inc.
("Marriott International") pursuant to the Distribution Agreement dated as of
September 15, 1993, as amended, between the Company and Marriott International.

          Until the Distribution Date, (i) the Rights will be evidenced by the
Common Stock certificates, and will be transferred with and only with the Common
Stock certificates, (ii) new Common Stock certificates issued after December 7,
1998 upon transfer or new issuance of the Common Stock will contain a notation
incorporating the Rights Agreement by reference, and (iii) the surrender for
transfer of any certificates for Common Stock outstanding will also 

                                       2
<PAGE>
 
constitute the transfer of the Rights associated with the Common Stock
represented by such certificate.

          The Rights are not exercisable until the Distribution Date and will
expire at the close of business on November 22, 2008, unless earlier redeemed or
exchanged by the Company as described below.  The Rights will not be exercisable
by a holder in any jurisdiction where the requisite qualification to the
issuance to such holder, or the exercise by such holder, of the Rights has not
been obtained or is not obtainable.

          As soon as practicable following the Distribution Date, separate
certificates evidencing the Rights ("Rights Certificates") will be mailed to
holders of record of the Common Stock as of the close of business on the
Distribution Date and, thereafter, the separate Rights Certificates alone will
evidence the Rights.  Except as otherwise determined by the Board of Directors,
only shares of Common Stock issued prior to the Distribution Date will be issued
with Rights.

          In the event that a person becomes the beneficial owner of 20% or more
of the then outstanding shares of Common Stock (except pursuant to an offer for
all outstanding shares of Common Stock which the Board of Directors determine to
be fair to and otherwise in the best interests of the Company and its
stockholders), each holder of a Right will, after the end of the Redemption
Period (as defined below), have the right (subject to the ownership limit and
the other ownership restrictions contained in the Company's Articles of
Incorporation) to exercise the Right by purchasing, for an amount equal to the
purchase price for the Right set forth in the Rights Certificate (the "Purchase
Price"), Common Stock (or, in certain circumstances, cash, property or other
securities of the Company) having a value equal to two times such amount.
Notwithstanding any of the foregoing, following the occurrence of the events set
forth in this paragraph, all Rights that are, or (under certain circumstances
specified in the Rights Agreement) were, beneficially owned by any Acquiring
Person will be null and void.

          In the event that, at any time following the Stock Acquisition Date,
(i) the Company is acquired in a merger or other business combination
transaction in which the Company is not the surviving corporation (other than a
merger which follows an offer described in the preceding paragraph), or (ii) 50%
or more of the Company's assets or earning power is sold or transferred, each
holder of a Right (except Rights which previously have become null and void as
set forth above) shall, after the expiration of the Redemption Period, have the
right to receive, upon exercise, common stock of the acquiring company having a
value equal to two times the Purchase Price of the Right.

          At any time after a person or group of affiliated or associated
persons becomes an Acquiring Person, the Board of Directors of the Company may
exchange the Rights (other than Rights owned by such person or group which have
become null and void), in whole or in part, at an exchange ratio of one share of
Common Stock per Right (subject to adjustment).

          The Purchase Price payable, and the number of one one-thousandths of a
share of Preferred Stock or other securities or property issuable, upon exercise
of the Rights are subject to adjustment from time to time to prevent dilution
(i) in the event of a stock dividend on, or a subdivision, combination or
reclassification of the Preferred Stock, (ii) upon the grant to holders of the
Preferred Stock of certain rights or warrants to subscribe for Preferred Stock
or convertible securities at less than the current market price of the Preferred
Stock, or (iii) upon the distribution to holders of the Preferred Stock of
evidences of indebtedness or assets 

                                       3
<PAGE>
 
(excluding regular quarterly cash dividends) or of subscription rights or
warrants (other than those referred to above).

          With certain exceptions, no adjustment in the Purchase Price will be
required until cumulative adjustments require an adjustment of at least 1% in
such Purchase Price.  No fractional shares will be issued (other than fractions
which are integral multiples of one one-thousandth of a share of Preferred
Stock) and in lieu thereof, an adjustment in cash will be made based on the
market price of the Preferred Stock on the last trading date prior to the date
of exercise.

          In general, the Board of Directors of the Company, may cause the
Company to redeem the Rights in whole, but not in part, at any time during the
period commencing on November 23, 1998, and ending on the tenth day following
the Stock Acquisition Date, as such period may be extended or shortened by the
Board of Directors (the "Redemption Period") at a price (the "Redemption Price")
of $.005 per Right (payable in cash, Common Stock or other consideration deemed
appropriate by the Board of Directors).  Under certain circumstances set forth
in the Rights Agreement, the decision to redeem the Rights will require the
concurrence of two-thirds of the Board of Directors.  After the Redemption
Period has expired, the Company's right of redemption may be reinstated if an
Acquiring Person reduces his beneficial ownership to 10% or less of the
outstanding shares of Common Stock in a transaction or series of transactions
not involving the Company and there are no other Acquiring Persons.  Immediately
upon the action of the Board of Directors of the Company ordering redemption of
the Rights, the Rights will terminate and the only right of the holders of
Rights will be to receive the Redemption Price.

          Until a Right is exercised, the holder thereof, as such, will have no
rights as a stockholder of the Company, including, without limitation, the right
to vote or to receive dividends.  While the distribution of the Rights will not
be subject to federal taxation to stockholders or to the Company, stockholders
may, depending upon the circumstances, recognize taxable income in the event
that the Rights become exercisable for Common Stock (or other consideration) of
the Company or for common stock of the acquiring company as set forth above.

          Other than those provisions relating to the principal economic terms
of the Rights (other than an increase in the Purchase Price), any of the
provisions of the Rights Agreement may be amended by the Board of Directors of
the Company prior to the Distribution Date.  After the Distribution Date, the
provisions of the Rights Agreement may be amended by the Board in order to cure
any ambiguity, defect or inconsistency or to make changes which do not adversely
affect the interests of holders of Rights (excluding the interests of any
Acquiring Person), or to shorten or lengthen any time period under the Rights
Agreement; provided however, no amendment to adjust the time period governing
redemption may be made at such time as the Rights are not redeemable.

          A total of 650,000 shares of Preferred Stock are reserved for issuance
upon exercise of the Rights.

          The Rights have certain anti-takeover effects.  The Rights will cause
substantial dilution to a person or group that attempts to acquire the Company
on terms not approved by the Board of Directors.

          The Rights Agreement, which specifies the terms of the Rights, is
attached hereto as Exhibit 4.1 and is incorporated herein by reference.  In
addition, (i) the Articles Supplementary of the Company Classifying and
Designating a Series of Preferred Stock as 

                                       4
<PAGE>
 
Series A Junior Participating Preferred Stock and Fixing Distribution and Other
Preferences and Rights of Such Series (Exhibit A to the Rights Agreement), and
(ii) the form of Rights Certificate (Exhibit C to the Rights Agreement), are
attached hereto as Exhibits 4.2 and 4.3, respectively, and are incorporated
herein by reference. The foregoing description of the Rights does not purport to
be complete and is qualified in its entirety by reference to such Exhibits.

ITEM 2.   EXHIBITS.

<TABLE> 
              <S>   <C>
               4.1  Rights Agreement, dated as of November 23, 1998, between the
                    Company and the Rights Agent.

               4.2  Articles Supplementary of the Company Classifying and
                    Designating a Series of Preferred Stock as Series A Junior
                    Participating Preferred Stock and Fixing Distribution and
                    Other Preferences and Rights of Such Series.

               4.3  Form of Rights Certificate.
</TABLE> 








    






    

                                       5
<PAGE>
 
          Pursuant to the requirements of Section 12 of the Securities Exchange
Act of 1934, the registrant has duly caused this registration statement to be
signed on its behalf by the undersigned, thereto duly authorized.


                                         HMC MERGER CORPORATION


                                         By: /s/ Christopher G. Townsend
                                            ------------------------------------
Date:  December 11, 1998                 Name:   Christopher G. Townsend
                                         Title:  Senior Vice President, General
                                                 Counsel and Corporate Secretary








    







    

                                       6
<PAGE>
 
                                    EXHIBITS

<TABLE> 
              <S>   <C>
               4.1  Rights Agreement, dated as of November 23, 1998, between the
                    Company and the Rights Agent.

               4.2  Articles Supplementary of the Company Classifying and
                    Designating a Series of Preferred Stock as Series A Junior
                    Participating Preferred Stock and Fixing Distribution and
                    Other Preferences and Rights of Such Series.

               4.3  Form of Rights Certificate.
</TABLE> 







    







   

                                       7

<PAGE>
 
                                                                     Exhibit 4.1


                             HMC MERGER CORPORATION

                                      AND

                              THE BANK OF NEW YORK

                                AS RIGHTS AGENT

                                RIGHTS AGREEMENT

                         DATED AS OF NOVEMBER 23, 1998
<PAGE>
 
                               TABLE OF CONTENTS
                                                                            Page
                                                                            ----

Section 1. Certain Definitions.............................................  1
Section 2. Appointment of Rights Agent.....................................  8
Section 3. Issue of Rights Certificates....................................  8
Section 4. Form of Rights Certificates.....................................  10
Section 5. Countersignature and Registration...............................  11
Section 6. Transfer, Split Up, Combination and Exchange
     of Rights Certificates; Mutilated, Destroyed, Lost
     or Stolen Rights Certificates.........................................  12
Section 7. Exercise of Rights; Purchase Price; Expiration
     Date of Rights........................................................  13
Section 8. Cancellation and Destruction of Rights Certificates.............  15
Section 9. Reservation and Availability of Capital Stock...................  16
Section 10. Series A Preferred Stock Record Date...........................  17
Section 11. Adjustment of Purchase Price, Number and Kind of
     Shares or Number of Rights............................................  18
Section 12. Certificate of Adjusted Purchase Price or Number
     of Shares.............................................................  27
Section 13. Consolidation, Merger or Sale or Transfer of Assets
     or Earning Power......................................................  27
Section 14. Fractional Rights and Fractional Shares........................  30
Section 15. Rights of Action...............................................  32
Section 16. Agreement of Rights Holders....................................  32
Section 17. Rights Certificate Holder Not Deemed a Stockholder.............  33
Section 18. Duties of Rights Agent.........................................  33
Section 19. Compensation and Indemnification of the Rights Agent...........  36
Section 20. Merger or Consolidation or Change of Name of
     Rights Agent..........................................................  37
Section 21. Change of Rights Agent.........................................  37
Section 22. Issuance of New Rights Certificates............................  38
Section 23. Redemption.....................................................  39
Section 24. Exchange.......................................................  40
Section 25. Notice of Certain Events.......................................  41
Section 26. Notices........................................................  42
Section 27. Supplements and Amendments.....................................  43
Section 28. Successors.....................................................  43
Section 29. Determinations and Actions by the Board, etc...................  44
Section 30. Benefits of this Agreement.....................................  44
Section 31. Severability...................................................  44
Section 32. Governing Law..................................................  45
Section 33. Counterparts...................................................  45
Section 34. Descriptive Headings...........................................  45
Section 35. Limitation of Ownership........................................  45


                                     - i -
<PAGE>
 
EXHIBIT A    -    FORM ARTICLES SUPPLEMENTARY OF HMC MERGER CORPORATION
                  CLASSIFYING AND DESIGNATING A SERIES OF PREFERRED STOCK AS
                  SERIES A JUNIOR PARTICIPATING PREFERRED STOCK AND FIXING
                  DISTRIBUTION AND OTHER PREFERENCES AND RIGHTS OF SUCH SERIES

EXHIBIT B    -    FORM OF SUMMARY OF RIGHTS
EXHIBIT C    -    FORM OF RIGHTS CERTIFICATE
                                                                                

                                    - ii -
<PAGE>
 
                                RIGHTS AGREEMENT
                                ----------------


          Rights Agreement, dated as of November 23, 1998 (the "Agreement"),
between HMC MERGER CORPORATION, a Maryland corporation (the "Company"), and 
THE BANK OF NEW YORK (the "Rights Agent").

          WHEREAS, on November 23, 1998 (the "Rights Dividend Declaration
Date"), the Board of Directors of the Company authorized and declared a dividend
of one Right for each share of Common Stock (as defined herein) of the Company
outstanding at the Close of Business (as defined herein) on the Record Date (as
defined herein), and has authorized the issuance of one Right with respect to
each share of Common Stock of the Company issued between the Record Date
(whether originally issued or delivered from the Company's treasury) and the
Distribution Date (as defined herein), each Right initially representing the
right to purchase one one-thousandth of a share of Series A Junior Participating
Series A Preferred Stock of the Company having the preferences, conversion or
other rights, voting powers, restrictions, limitations as to dividends,
qualifications, and terms or conditions of redemption set forth in the form of
Articles Supplementary of HMC Merger Corporation Classifying and Designating a
Series of Preferred Stock as Series A Junior Participating Preferred Stock and
Fixing Distribution and Other Preferences and Rights of such Series attached
hereto as Exhibit A, upon the terms and subject to the conditions hereinafter
          ---------                                                          
set forth.

          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 have the meanings
indicated:

           (a) "Acquiring Person" shall mean any Person (as defined herein) who
         or which, together with all Affiliates and Associates (as such terms
         are defined herein) of such Person, shall be the Beneficial Owner (as
         defined herein) of 20% or more of the shares of Common Stock then
         outstanding, but shall not include (i) Host Marriott Corporation, a
         Delaware Corporation and the parent of the Company, (ii) the Company,
         (iii) any Subsidiary of the Company, or (iv) any employee benefit plan
         of the Company or any Subsidiary of the Company, or any Person holding
         shares of Common Stock for or pursuant to the terms of any such plan to
         the extent, and only to the extent, of such shares so held.
         Notwithstanding the foregoing, no Person shall become an "Acquiring
         Person" as the result of an acquisition of shares of Common Stock by
         the 
<PAGE>
 
         Company which, by reducing the number of shares of Common Stock
         outstanding, increases the proportionate number of shares of Common
         Stock beneficially owned by such Person to 20% or more of the shares of
         Common Stock of the Company then outstanding; provided, however, that
                                                       --------  -------      
         if a Person shall become the Beneficial Owner of 20% or more of the
         Common Stock of the Company then outstanding by reason of share
         purchases by the Company and shall, after such share purchases by the
         Company, become the Beneficial Owner of any additional shares of Common
         Stock of the Company, then such Person shall be deemed to be an
         "Acquiring Person" if such Person is then the Beneficial Owner of 
         20% or more of the Common Stock then outstanding.  Notwithstanding the
         foregoing, if the Board of Directors of the Company determines in good
         faith that a Person who would otherwise be an "Acquiring Person", as
         defined pursuant to the foregoing provisions of this paragraph (a), has
         become such inadvertently, and such Person divests as promptly as
         practicable a sufficient number of shares of Common Stock so that such
         Person would no longer be an "Acquiring Person", then such Person shall
         not be deemed an "Acquiring Person" for any purposes of this Agreement
         unless and until such Person shall again become an "Acquiring Person".

          (b) "Adjustment Shares" shall have the meaning set forth in Section
         11(a)(ii) hereof.

          (c) "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 defined herein).

          (d) "Agreement" shall mean this Stockholder Rights Agreement as
         originally executed or as it may from time to time be supplemented or
         amended pursuant to the applicable provisions hereof.

          (e) A Person shall be deemed the "Beneficial Owner" of and shall be
         deemed to "beneficially own" any securities:

                    (i)  which such Person or any of such Person's Affiliates or
              Associates, directly or indirectly, has the right to acquire
              (whether such right is exercisable immediately or only after the
              passage of time) pursuant to any agreement, arrangement or
              understanding (whether or not in writing), or upon the exercise of
              conversion rights, exchange rights, other rights (other than these
              Rights), warrants or options, or otherwise; provided, however,
                                                          --------  ------- 
              that a Person shall not be deemed the "Beneficial Owner" of, or to
              "beneficially own", (A) securities tendered pursuant to a tender
              or exchange offer made by or on behalf of such Person or any of
              such 

                                      -2-
<PAGE>
 
              Person's Affiliates or Associates until such tendered
              securities are accepted for purchase or exchange; or (B)
              securities issuable upon exercise of Rights at any time prior to
              the occurrence of a Triggering Event, or (C) securities issuable
              upon exercise of Rights from and after the occurrence of a
              Triggering Event which Rights were acquired by such Person or any
              of such Person's Affiliates or Associates prior to the
              Distribution Date or pursuant to Section 3(a) or Section 22 hereof
              (the "Original Rights") or pursuant to Section 11(i) hereof in
              connection with an adjustment made with respect to any Original
              Rights;

                    (ii)  which such Person or any of such Person's Affiliates
              or Associates, directly or indirectly, has the right to vote or
              dispose of or has "beneficial ownership" of (as determined
              pursuant to Rule 13d-3 of the General Rules and Regulations under
              the Exchange Act), including pursuant to any agreement,
              arrangement or understanding, whether or not in writing; provided,
                                                                       -------- 
              however, that a Person shall not be deemed the "Beneficial Owner"
              -------                                                          
              of, or to beneficially own, any security under this subparagraph
              (ii) as a result of an agreement, arrangement or understanding to
              vote such security if such agreement, arrangement or
              understanding:  (A) arises solely from a revocable proxy given in
              response to a public proxy or consent solicitation made pursuant
              to, and in accordance with, the applicable provisions of the
              General Rules and Regulations under the Exchange Act, and (B) is
              not also then reportable by such Person on Schedule 13D under the
              Exchange Act (or any comparable or successor report); or

                   (iii)  which are beneficially owned, directly or indirectly,
              by any other Person (or any Affiliate or Associate thereof) with
              which such Person or any of such Person's Affiliates or Associates
              has any agreement, arrangement or understanding (whether or not in
              writing), for the purpose of acquiring, holding, voting (except
              pursuant to a revocable proxy as described in the proviso to
              subparagraph (ii) of this paragraph (e)) or disposing of any
              voting securities of the Company;

         provided, however, that nothing in this paragraph (e) shall cause a
         --------  -------                                          
         Person engaged in business as an underwriter of securities to be the
         "Beneficial Owner" of, or to "beneficially own," any securities
         acquired through such Person's participation in good faith in a firm
         commitment underwriting until the expiration of forty days after the
         date of such acquisition. Notwithstanding anything contained in this
         paragraph (e),

                                      -3-
<PAGE>
 
         a Person shall not be deemed the "Beneficial Owner" of, or to
         "beneficially own" any Exempt Shares.

          (f) "Board" shall mean the Board of Directors of the Company.

          (g) "Business Day" shall mean any day other than a Saturday, Sunday,
         or a day on which banking or trust institutions in the State of New
         York are authorized or obligated by law or executive order to close.

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

          (i) "Common Stock" when used with reference to the Company shall mean
         the shares of common stock, par value $.01 per share, of the Company.
         "Common Stock" when used with reference to any Person other than the
         Company shall mean the class of capital stock with the greatest
         aggregate voting power, or the class of equity securities or other
         equity interests having power to control or direct the management, of
         such Person.

          (j) "Company" shall mean HMC Merger Corporation, a Maryland
         corporation.

          (k) "Distribution Agreement" shall mean that certain Distribution
         Agreement dated as of September 15, 1993 between the Company and
         Marriott International, Inc., and as amended in Amendment No. 1 dated
         as of December 29, 1995, Amendment No. 2 dated as of June 21, 1997,
         Amendment No. 3 dated as of March 3, 1998, and Amendment No. 4 to be
         entered into in connection with the merger contemplated by the Merger
         Agreement (as defined herein) pursuant to which the Company has granted
         to MII, its successors and in certain circumstances its permitted
         assigns, the right (the "MII Purchase Right") to purchase up to 20% of
         each class of the then outstanding voting stock of the Company upon the
         occurrence of certain events as specified in the Distribution
         Agreement.

          (l) "Distribution Date" shall mean the earlier of (i) the Close of
         Business on the tenth day after the Stock Acquisition Date (or, if the
         tenth day after the Stock Acquisition Date occurs before the Record
         Date, the Close of Business on the Record Date), or (ii) the Close of
         Business on the tenth Business Day (or, if such tenth Business Day
         occurs before the Record Date, the Close of Business on the Record
         Date), or such specified or unspecified later date on or after the
         Record 

                                      -4-
<PAGE>
 
         Date as may be determined by action of the Board prior to such
         time as any Person becomes an Acquiring Person, after the date that a
         tender or exchange offer by any Person (other than the Company, any
         Subsidiary of the Company or any employee benefit plan of the Company
         or of any Subsidiary of the Company or any Person holding shares of
         Common Stock for or pursuant to the terms of any such plan) is first
         published or sent or given within the meaning of Rule 14d-2(a) of the
         General Rules and Regulations under the Exchange Act, if upon
         consummation thereof, such Person would be the beneficial owner of 20%
         or more of the outstanding shares of Common Stock.

          (m) "Equivalent Preferred Stock" shall have the meaning set forth in
         Section 11(b) hereof.

          (n) "Exchange Act" shall mean the Securities Exchange Act of 1934, as
         amended, as in effect on the date of this Agreement.

          (o) "Exchange Date" shall have the meaning set forth in Section 7(a)
         hereof.

          (p) "Exempt Shares" shall mean, as to any Person, (i) shares of
         Common Stock beneficially owned (without giving effect to the last
         sentence of Section 1(e)) by such Person that have been received by
         such Person pursuant to the Agreement and Plan of Merger dated as of
         November 23, 1998, by and among the Company, Host Marriott Corporation
         and Host Marriott L.P. (the "Merger Agreement"), in exchange for shares
         of common stock, par value $1.00 per share of Host Marriott Corporation
         ("HM Common Stock"), which such Person beneficially owned on February
         3, 1989, and owned continuously thereafter until the Merger (as such
         term is defined in the Merger Agreement), (ii) shares of Common Stock
         which were acquired by such Person pursuant to a gift, bequest,
         inheritance or distribution from a trust or from a corporation
         controlled by such Person, where such shares of Common Stock were
         Exempt Shares immediately prior to such acquisition and where such
         shares of Common Stock were beneficially owned (without giving effect
         to the last sentence of Section 1(e)) by such Person continuously after
         such acquisition, (iii) shares of Common Stock acquired by such Person
         as a result of a stock dividend, stock distribution or other
         recapitalization, in respect to Exempt Shares only, whereby any Common
         Stock received by such Person is substantially proportional to the
         amount of Common Stock owned by such Person prior to such transaction
         and where such Common Stock is beneficially owned (without giving
         effect to the last sentence of Section 1(e)) by such Person
         continuously thereafter, (iv) shares of Common Stock acquired by such
         Person as a result of such Person becoming a Beneficial Owner 

                                      -5-
<PAGE>
 
         (without giving effect to the last sentence of Section 1(e)) pursuant
         solely to clauses (ii) or (iii) of Section 1(e) by any other Person,
         and (v) any shares of Common Stock acquired by such Person as a result
         of the exercise of the MII Purchase Right. For purposes of determining
         whether any shares of Common Stock are Exempt Shares pursuant to
         clauses (i), (ii), (iii) or (iv) of this Section 1(p), any share of HM
         Common Stock that was held in "street" or "nominee" name at the
         effective time of the Merger (as such term is defined in the Merger
         Agreement) shall be presumed to have been acquired by the beneficial
         owner subsequent to February 3, 1989. This presumption shall be
         rebuttable upon presentation to the Company of satisfactory evidence
         that such share of HM Common Stock has had the same beneficial owner
         (without giving effect to the last sentence of Section 1(e)) on and
         continuously after February 3, 1989 until the Merger. Any disputes
         arising pursuant to this definition shall be definitively resolved by
         the Board, in its sole discretion.

          (q) "Exercise Notice" shall mean a written notice delivered by MII
         (or any successor or assignee of MII to the extent permitted under the
         Distribution Agreement) to the Company pursuant to Section 6.07 of the
         Distribution Agreement, which notice constitutes an irrevocable
         commitment to purchase a specified number of shares of Common Stock
         through exercise of the MII Purchase Right.

          (r) "Expiration Date" shall have the meaning set forth in Section 7(a)
         hereof.

          (s) "Final Expiration Date" shall have the meaning set forth in
         Section 7(a) hereof.

          (t) "MII" shall mean Marriott International, Inc., a Delaware
         corporation.

          (u) "MII Purchase Right" shall mean the right granted by the Company
         pursuant to Section 6.07 of the Distribution Agreement to MII (or any
         successor or assignee of MII to the extent permitted under the
         Distribution Agreement).

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

          (w) "Principal Party" shall have the meaning set forth in Section
         13(b) hereof.

                                      -6-
<PAGE>
 
          (x) "Purchase Price" shall have the meaning set forth in Section 4(a)
         and 11(a)(ii) hereof.

          (y) "Record Date" shall mean the close of business on December 7,
         1998.

          (z) "Redemption Period" shall have the meaning set forth in Section
         23(a) hereof.

          (aa) "Redemption Price" shall have the meaning set forth in Section
         23(a) hereof.

          (bb) "Rights Agent" shall mean The Bank of New York.

          (cc) "Rights Certificate" shall have the meaning set forth in Section
         3(d) hereof.

          (dd) "Rights Dividend Declaration Date" shall mean the close of
         business on November 23, 1998.

          (ee) "Section 11(a)(ii) Event" shall mean any event described in
         Section 11(a)(ii) hereof.

           (ff) "Section 11(a)(ii) Trigger Date" shall have the meaning set
         forth in Section 11(a)(iii) hereof.

           (gg) "Section 13 Event" shall mean any event described in clauses
         (x), (y) or (z) of Section 13(a) hereof.

           (hh) "Securities Act" shall mean the Securities Act of 1933, as
         amended and as in effect on the date of this Agreement.

           (ii) "Series A Preferred Stock" shall mean shares of Series A Junior
         Participating Series A Preferred Stock of the Company.

           (jj) "Stock Acquisition Date" shall mean the first date of public
         announcement (which, for purposes of this definition, shall include,
         without limitation, a report filed pursuant to Section 13(d) of the
         Exchange Act) by the Company or an Acquiring Person that an Acquiring
         Person has become such.

          (kk) "Spread" shall have the meaning set forth in Section 11(a)(iii)
         hereof.

                                      -7-
<PAGE>
 
          (ll) "Stock Equivalents" shall have the meaning set forth in Section
         11(a)(iii) hereof.

          (mm) "Subsidiary" of 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, or is otherwise controlled by such Person.

          (nn) "Substitution Period" shall have the meaning set forth in Section
         11(a)(iii) hereof.

          (oo) "Summary Rights" shall have the meaning set forth in Section 3(a)
         hereof.

          (pp) "Trading Day" shall have the meaning set forth in Section
         11(d)(i) hereof.

          (qq) "Triggering Event" shall mean any Section 11(a)(ii) Event or any
         Section 13 Event.

     SECTION 2.  APPOINTMENT OF RIGHTS AGENT.

          The Company hereby appoints the Rights Agent to act as agent for the
Company and the holders of the Rights (who, in accordance with Section 3 hereof,
shall prior to the Distribution Date also be the holders of the Common Stock) in
accordance with the terms and conditions hereof, and the Rights Agent hereby
accepts such appointment.  The Company may from time to time appoint such Co-
Rights Agents as it may deem necessary or desirable.

     SECTION 3.  ISSUE OF RIGHTS CERTIFICATES.

          (a) As promptly as practicable following the Record Date, the Company
will send or deliver a copy of a Summary of Rights to Purchase Series A
Preferred Stock, in substantially the form attached hereto as Exhibit B (the
                                                              ---------     
"Summary of Rights"), to each record holder of Common Stock as of the Close of
Business on the Record Date at the address of such holder shown on the records
of the Company.  With respect to certificates for shares of Common Stock
outstanding as of the Record Date, until the Distribution Date, the Rights will
be evidenced by such certificates for the Common Stock and the registered
holders of the Common Stock shall also be the registered holders of the
associated Rights.  Until the Distribution Date (or the earlier Expiration Date
or Final Expiration Date), the transfer of any certificate representing shares
of Common Stock in respect of which Rights have been issued shall also
constitute the transfer of the Rights associated with the shares of Common Stock
represented thereby.

                                      -8-
<PAGE>
 
          (b) Rights shall be issued in respect of all shares of Common Stock
issued (whether originally issued or from the Company's treasury) after the
Record Date but prior to the earlier of the Distribution Date or the Expiration
Date or the Final Expiration Date.  Rights shall also be issued to the extent
provided in Section 22 in respect of all shares of Common Stock which are issued
(whether originally issued or from the Company's treasury) after the
Distribution Date and prior to the Expiration Date.  Certificates representing
such shares of Common Stock shall also be deemed to be certificates for Rights,
and shall bear the following legend (in addition to any other legends that may
be required):

         This Certificate also evidences and entitles the holder hereof to
         certain Rights as set forth in a Rights Agreement between HMC Merger
         Corporation, a Maryland corporation (the "Corporation") and The Bank of
         New York (the "Rights Agent"), dated as of November 23, 1998 (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 the Corporation.  Under certain circumstances, as set forth
         in the Rights Agreement, such Rights will be evidenced by separate
         certificates and will no longer be evidenced by this Certificate.  The
         Corporation will mail to the holder of this Certificate a copy of the
         Rights Agreement as in effect on the date of mailing without charge
         after receipt of a written request therefor.

         Under certain circumstances set forth in the Rights Agreement, Rights
         issued to, or held by, any Person who is, was or becomes an Acquiring
         Person or any Affiliate or Associate thereof (as such terms are defined
         in the Rights Agreement), whether currently held by or on behalf of
         such Person or by any subsequent holder, may become null and void.  The
         Rights shall not be exercisable, and shall be null and void so long as
         held, by a holder in any jurisdiction where the requisite qualification
         of the issuance to such holder, or the exercise by such holder, of the
         Rights in such jurisdiction shall not have been obtained or be
         obtainable.

With respect to such certificates containing the foregoing legend, until the
earlier of (i) the Distribution Date or (ii) the Expiration Date, the Rights
associated with the Common Stock represented by such certificates shall be
evidenced by such certificates alone and registered holders of Common Stock
shall also be the registered holders of the associated Rights, and the transfer
of any such certificate shall also constitute the transfer of the Rights
associated with the Common Stock represented thereby.

          (c) Until the Distribution Date (i) the Rights will be evidenced
(subject to the provisions of paragraph (a) of this Section 3) by the
certificates for Common Stock registered in the names of the holders thereof
(which certificates for Common Stock shall also be deemed to be Rights
Certificates) and not by separate 

                                      -9-
<PAGE>
 
Rights Certificates, and (ii) the Rights will be transferable only in connection
with the transfer of the underlying shares of Common Stock (including a transfer
to the Company).

          (d) As soon as practicable after the Distribution Date, the Rights
Agent upon notification thereof will send by first-class, insured, postage
prepaid mail, to each record holder of Common Stock as of the Close of Business
on the Distribution Date, at the address of such holder shown on the records of
the Company, a rights certificate, in substantially the form of Exhibit C hereto
                                                                ---------       
(the "Rights Certificate"), evidencing one Right for each share of Common Stock
so held, subject to adjustment as provided herein.  In the event that an
adjustment in the number of Rights per share of Common Stock has been made
pursuant to Section 11 hereof, at the time of distribution of the Rights
Certificates, the Company shall make necessary and appropriate rounding
adjustments (in accordance with Section 14(a) hereof) so that Rights
Certificates representing only whole numbers of Rights are distributed and cash
is paid in lieu of any fractional Rights.  As of and after the Distribution
Date, the Rights will be evidenced solely by such Right Certificates.

          (e) Notwithstanding anything to the contrary set forth herein, if an
Exercise Notice with respect to the MII Purchase Right is delivered to the
Company on or prior to the Distribution Date, the shares of Common Stock
issuable upon exercise of the MII Purchase Right as specified in the Exercise
Notice shall be deemed to have been issued prior to the Distribution Date, and
any holder of a share of Common Stock issued upon exercise of the MII Purchase
Right shall be entitled to receive the same number of Rights per share of Common
Stock as if such holder were a record holder of Common Stock as of the Close of
Business on the Distribution Date as provided in Section 3(d), even if the
closing with respect to the sale of shares of Common Stock upon exercise of the
MII Purchase Right occurs after the Distribution Date.  MII shall notify the
Rights Agent of any Exercise Notice delivered with respect to the MII Purchase
Right and shall list the names and addresses of any Persons that are entitled to
receive Rights Certificates as a result of the exercise of the MII Purchase
Right on the stockholder records of the Company that are provided to the Rights
Agent pursuant to Section 3(d) for the purpose of mailing and distributing
Rights Certificates to holders of Common Stock.

     SECTION 4.  FORM OF RIGHTS CERTIFICATES.

          (a) The Rights Certificates (and the forms of election to purchase and
of assignment to be printed on the reverse thereof) shall be substantially the
same as Exhibit C hereto and may have such marks of identification or
        ---------                                                    
designation and such legends, summaries or endorsements printed thereon as the
Company may deem appropriate, and as are not inconsistent with the provisions of
this Agreement, or as may be required to comply with any applicable law or with
any 

                                      -10-
<PAGE>
 
rule or regulation made pursuant thereto or with any rule or regulation of any
stock exchange on which the Rights may from time to time be listed, or to
conform to usage. Subject to the provisions of Section 11 and Section 22 hereof,
the Rights Certificates, whenever issued, shall be dated as of the Record Date,
and on their face shall entitle the holders thereof to purchase such number of
one one-thousandths of a share of Series A Preferred Stock as shall be set forth
therein at the price set forth therein (such exercise price per one one-
thousandth of a share, the "Purchase Price"), but the amount and type of
securities purchasable upon exercise of each Right and the Purchase Price
thereof shall be subject to adjustment as provided herein.

          (b) Any Rights Certificate issued pursuant to Section 3(d) or Section
22 hereof that represents Rights beneficially owned by:  (i) an Acquiring Person
or any Associate or Affiliate of an Acquiring Person; (ii) a transferee of an
Acquiring Person (or of any such Associate or Affiliate) who becomes a
transferee after the Acquiring Person becomes such; or (iii) a transferee of an
Acquiring Person (or of any such Associate or Affiliate) who becomes a
transferee prior to or concurrently with the Acquiring Person becoming such and
receives such Rights pursuant to either (A) a transfer (whether or not for
consideration) from the Acquiring Person to holders of equity interests in such
Acquiring Person or to any Person with whom such Acquiring Person has any
continuing agreement, arrangement or understanding regarding the transferred
Rights or (B) a transfer which a majority of the Board has determined is part of
an agreement, arrangement or understanding which has as a primary purpose or
effect avoidance of Section 7(e) hereof and any Rights Certificate issued
pursuant to Section 6 or Section 11 hereof upon transfer, exchange, replacement
or adjustment of any other Rights Certificate referred to in this sentence,
shall contain (to the extent feasible) the following legend:

         The Rights represented by this Rights Certificate are or were
         beneficially owned by a Person who was or became an Acquiring Person or
         an Affiliate or Associate of an Acquiring Person (as such terms are
         defined in the Rights Agreement).  Accordingly, this Rights Certificate
         and the Rights represented hereby may become null and void in the
         circumstances specified in Section 7(e) of such Rights Agreement.

     SECTION 5.  COUNTERSIGNATURE AND REGISTRATION.

          (a) The Rights Certificates shall be executed on behalf of the Company
by its President, a Vice-President or the Chairman of the Board and
countersigned by the Secretary, an Assistant Secretary, the Treasurer or an
Assistant Treasurer, in each case either manually or by facsimile signature, and
have affixed thereto the Company's seal or a facsimile thereof.  The Rights
Certificates shall be countersigned, either manually or by facsimile signature,
by 

                                      -11-
<PAGE>
 
the Rights Agent and shall not be valid for any purpose unless so countersigned
(but it shall not be necessary for the same signatory to countersign all of the
Rights Certificates hereunder). In case any officer of the Company who shall
have signed any of the Rights Certificates shall cease to be such officer of the
Company before countersignature by the Rights Agent and issuance and delivery by
the Company, such Rights Certificates, nevertheless, may be countersigned by the
Rights Agent, and issued and delivered by the Company with the same force and
effect as though the person who signed such Rights Certificates had not ceased
to be such officer of the Company; and any Rights Certificate may be signed on
behalf of the Company by any person who, at the actual date of the execution of
such Rights Certificate, shall be a proper officer of the Company to sign such
Rights Certificate, although at the date of the execution of this Agreement any
such person was not such an officer.

          (b) Following the Distribution Date, the Rights Agent will keep or
cause to be kept, at its principal office or at offices designated as the
appropriate place for surrender of Rights Certificates upon exercise or
transfer, books for registration and transfer of the Rights Certificates issued
hereunder.  Such books shall show the names and addresses of the respective
holders of the Rights Certificates, the number of Rights evidenced on its face
by each of the Rights Certificates and the date of each of the Rights
Certificates.

    SECTION 6.  TRANSFER, SPLIT UP, COMBINATION AND EXCHANGE OF RIGHTS
                CERTIFICATES; MUTILATED, DESTROYED, LOST OR STOLEN RIGHTS
                CERTIFICATES.

          (a) Subject to the provisions of Section 4(b), Section 7(e) and
Section 14 hereof, at any time after the Close of Business on the Distribution
Date and at or prior to the Close of Business on the earlier of the Expiration
Date or Final Expiration Date, any Rights Certificate or Certificates may be
transferred, split up, combined or exchanged for another Rights Certificate or
Certificates, entitling the registered holder to purchase a like number of one
one-thousandths of a share of Series A Preferred Stock (or following a
Triggering Event, Common Stock, other securities, cash, or other assets, as the
case may be) as the Rights Certificate or Certificates surrendered then entitled
such holder (or former holder in the case of a transfer) to purchase.  Any
registered holder desiring to transfer, split up, combine or exchange any Rights
Certificate shall make such request in writing delivered to the Rights Agent,
and shall surrender the Rights Certificate or Certificates to be transferred,
split up, combined or exchanged at the office of the Rights Agent designated for
such purpose.  Neither the Rights Agent nor the Company shall be obligated to
take any action whatsoever with respect to the transfer of any such surrendered
Rights Certificate until the registered holder shall have properly completed and
signed the certificate contained in the form of assignment on the reverse side
of such Rights Certificate and shall have provided such additional evidence of
the identity of the Beneficial Owner (or former 

                                      -12-
<PAGE>
 
Beneficial Owner) or Affiliates or Associates thereof as the Company shall
reasonably request. Thereupon the Rights Agent shall, subject to Section 4(b),
Section 7(e) and Section 14 hereof, countersign and deliver to the Person
entitled thereto a Rights Certificate or Certificates, as the case may be, as so
requested. The Company may require payment of a sum sufficient to cover any tax
or governmental charge that may be imposed in connection with any transfer,
split up, combination or exchange of Rights Certificates.

          (b) Upon receipt by the Company and the Rights Agent of evidence
reasonably satisfactory to them of the loss, theft, destruction or mutilation of
a Rights Certificate, and, in case of loss, theft or destruction, of indemnity
or security reasonably satisfactory to them, and, at the Company's request,
reimbursement to the Company and the Rights Agent of all reasonable expenses
incidental thereto, and upon surrender to the Rights Agent and cancellation of
the Rights Certificate if mutilated, the Company will execute and deliver a new
Rights Certificate of like tenor to the Rights Agent for countersignature and
delivery to the registered owner in lieu of the Rights Certificate so lost,
stolen, destroyed, or mutilated.

     SECTION 7.  EXERCISE OF RIGHTS; PURCHASE PRICE; EXPIRATION DATE OF RIGHTS.

          (a) Subject to Section 7(e) hereof, the registered holder of any
Rights Certificate may exercise the Rights evidenced thereby (except as
otherwise provided herein, including, without limitation, the restrictions on
exercisability set forth in Section 9(c), Section 11(a)(iii) and Section 23(a)
hereof) in whole or in part at any time after the Distribution Date upon
surrender of the Rights Certificate, with the form of election to purchase and
the certificate on the reverse side thereof duly and properly executed, to the
Rights Agent at the office of the Rights Agent designated for such purpose,
together with payment of the Purchase Price for each one one-thousandth of a
share of Series A Preferred Stock (or other securities, cash or other assets, as
the case may be) as to which the Rights are exercised, at or prior to the
earlier of (i) the close of business on November 22, 2008 (the "Final Expiration
Date"), (ii) the time at which the Rights are redeemed as provided in Section 23
hereof, (iii) the time at which such Rights are exchanged (the "Exchange Date")
as provided in Section 24 hereof, or (iv) the time at which the Rights expire
pursuant to Section 13(d) hereof (the earliest of (i), (ii), (iii) and (iv)
being herein referred to as the "Expiration Date").

          (b) Each Right shall entitle the registered holder thereof to purchase
one one-thousandth of a share of Series A Preferred Stock, and the Purchase
Price for each one one-thousandth of a share of Series A Preferred Stock
pursuant to the exercise of a Right shall initially be $55.00, and shall be
subject to adjustment from time to time as provided in Sections 11 and 13 hereof
and shall be payable in lawful money of the United States of America in
accordance with paragraph (c) below.

                                      -13-
<PAGE>
 
          (c) Upon receipt of a Rights Certificate representing exercisable
Rights, with the form of election to purchase and the certificate duly and
properly executed, accompanied by payment, with respect to each Right so
exercised, of the Purchase Price per one one-thousandth of a share of Series A
Preferred Stock (or Common Stock, other securities, cash or other assets, as the
case may be) to be purchased and an amount equal to any applicable transfer tax
or governmental charge in cash, or by certified check, cashier's check or bank
draft payable to the order of the Company, the Rights Agent shall, subject to
Section 18(k) hereof, thereupon promptly (i) (A) requisition from any transfer
agent of the shares of Series A Preferred Stock (or make available, if the
Rights Agent is the transfer agent) certificates for the total number of one
one-thousandths of a share of Series A Preferred Stock to be purchased and the
Company hereby irrevocably authorizes its transfer agent to comply with all such
requests, or (B) if the Company shall have elected to deposit the total number
of shares of Series A Preferred Stock issuable upon exercise of the Rights
hereunder with a depositary agent, requisition from the depositary agent
depositary receipts representing such number of one one-thousandths of a share
of Series A Preferred Stock as are to be purchased (in which case certificates
for the shares of Series A Preferred Stock represented by such receipts shall be
deposited by the transfer agent with the depositary agent) and the Company will
direct the depositary to comply with such request, (ii) requisition from the
Company the amount of cash, if any, to be paid in lieu of issuance of fractional
shares in accordance with Section 14, (iii) promptly after receipt of such
certificates or depositary receipts, cause the same to be delivered to or upon
the order of the registered holder of such Rights Certificate, registered in
such name or names as may be designated by such holder and (iv) after receipt
thereof, promptly deliver such cash, if any, to or upon the order of the
registered holder of such Rights Certificate.  In the event that the Company is
obligated to issue other securities (including Common Stock) of the Company, pay
cash and/or distribute other property pursuant to Section 11(a) hereof, the
Company will make all arrangements necessary so that such securities, cash
and/or other property are available for distribution by the Rights Agent, if and
when appropriate.

          (d) In case the registered holder of any Rights Certificate shall
exercise less than all the Rights evidenced thereby, a new Rights Certificate
evidencing Rights equivalent to the Rights remaining unexercised shall be issued
by the Rights Agent and delivered to, or upon the order of, the registered
holder of such Rights Certificate, registered in such name or names as may be
designated by such holder, subject to the provisions of Section 14 hereof.

          (e) Notwithstanding anything in this Agreement to the contrary, from
and after the first occurrence of a Section 11(a)(ii) Event, any Rights
beneficially owned by (i) an Acquiring Person or an Associate or Affiliate of an
Acquiring Person, (ii) a transferee of an Acquiring Person (or of any such
Associate or Affiliate) who becomes a transferee after the Acquiring Person
becomes such, or 

                                      -14-
<PAGE>
 
(iii) a transferee of an Acquiring Person (or of any such Associate or
Affiliate) who becomes a transferee prior to or concurrently with the Acquiring
Person becoming such and receives such Rights pursuant to either (A) a transfer
(whether or not for consideration) from the Acquiring Person to holders of
equity interests in such Acquiring Person or to any Person with whom such
Acquiring Person has any continuing agreement, arrangement or understanding
regarding the transferred Rights or (B) a transfer which a majority of the Board
has determined is part of an agreement, arrangement or understanding which has
as a primary purpose or effect the avoidance of this Section 7(e), shall become
null and void without any further action, and no holder of such Rights shall
have any rights whatsoever with respect to such Rights, whether under any
provision of this Agreement or otherwise. The Company shall use all reasonable
efforts to ensure that the provisions of this Section 7(e) and Section 4(b)
hereof are complied with, but shall have no liability to any holder of Rights
Certificates or other Person as a result of its failure to make any
determinations with respect to an Acquiring Person or its Affiliates, Associates
or transferees hereunder.

          (f) Notwithstanding anything in this Agreement to the contrary,
neither the Rights Agent nor the Company shall be obligated to undertake any
action with respect to a registered holder upon the occurrence of any purported
exercise as set forth in this Section 7 unless such registered holder shall have
(i) properly completed and signed the certificate contained in the form of
election to purchase set forth on the reverse side of the Rights Certificate
surrendered for such exercise, and (ii) provided such additional evidence of the
identity of the Beneficial Owner (or former Beneficial Owner) or Affiliates or
Associates thereof as the Company shall reasonably request.

     SECTION 8.  CANCELLATION AND DESTRUCTION OF RIGHTS CERTIFICATES.

          All Rights Certificates surrendered for the purpose of exercise,
transfer, split up, combination or exchange shall, if surrendered to the Company
or to any of its agents, be delivered to the Rights Agent for cancellation or in
canceled form, or, if surrendered to the Rights Agent, shall be canceled by it,
and no Rights Certificates shall be issued in lieu thereof except as expressly
permitted by any provisions of this Agreement.  The Company shall deliver to the
Rights Agent for cancellation and retirement, and the Rights Agent shall so
cancel and retire, any other Rights Certificate purchased or acquired by the
Company otherwise than upon the exercise thereof.  The Rights Agent shall
deliver all canceled Rights Certificates to the Company, or shall, at the
written request of the Company, destroy such canceled Rights Certificates, and
in such case shall deliver a certificate of destruction thereof to the Company.

                                      -15-
<PAGE>
 
     SECTION 9.  RESERVATION AND AVAILABILITY OF CAPITAL STOCK.

          (a) The Company covenants and agrees that it will cause to be reserved
and kept available out of its authorized and unissued shares of Series A
Preferred Stock (and following the occurrence of a Triggering Event, out of its
authorized and unissued shares of Common Stock and/or other securities or out of
its authorized and issued shares held in its treasury), the number of shares of
Series A Preferred Stock (and, following the occurrence of a Triggering Event,
shares of Common Stock and/or other securities) that, as provided in this
Agreement, including Section 11(a)(iii) hereof, will be sufficient to permit the
exercise in full of all outstanding Rights.

          (b) In the event the shares of Series A Preferred Stock (and,
following the occurrence of a Triggering Event, Common Stock and/or other
securities) issuable upon the exercise of Rights become listed on any national
securities exchange, the Company shall use its best efforts to cause, from and
after such time as the Rights become exercisable, all such shares reserved for
such issuance to be listed on such exchange upon official notice of issuance
upon such exercise.

          (c) The Company shall use its best efforts to (i) file, as soon as
practicable following the earliest date after the first occurrence of a Section
11(a)(ii) Event on which the consideration to be delivered by the Company upon
exercise of the Rights has been determined in accordance with this Agreement, or
as soon as is required by law following the Distribution Date, as the case may
be, a registration statement under the Securities Act with respect to the
securities purchasable upon exercise of the Rights on an appropriate form, 
(ii) cause such registration statement to become effective as soon as
practicable after such filing, and (iii) cause such registration statement to
remain effective (with a prospectus at all times meeting the requirements of the
Securities Act) until the earlier of (A) the date as of which the Rights are no
longer exercisable for such securities, and (B) the Expiration Date. The Company
also shall 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 exercisability of the Rights. The Company may temporarily suspend, for a
period of time not to exceed ninety (90) days after the date set forth in clause
(i) of the first sentence of this Section 9(c), the exercisability of the Rights
in order to prepare and file such registration statement and permit it to become
effective. In addition, if the Company shall determine that a registration
statement is required following the Distribution Date, the Company may
temporarily suspend the exercisability of the Rights until such time as a
registration statement has been declared effective. Upon any suspension of
exercisability of Rights referred to in this Section 9(c), the Company shall
issue a public announcement stating that the exercisability of the Rights has
been temporarily suspended, as well as a public announcement at such time as the
suspension is no longer in effect. Notwithstanding any provision of this
Agreement to the contrary, the Rights shall not be exercisable and shall be null
and void so long as held by a holder in any 

                                      -16-
<PAGE>
 
jurisdiction where the requisite qualification to the issuance to such holder,
or the exercise by such holder, of the Rights in such jurisdiction shall not
have been obtained or be obtainable, or the exercise thereof shall not be
permitted under applicable law or a registration statement shall not have been
declared effective.

          (d) Subject to Section 11(a)(iii) hereof, the Company covenants and
agrees that it will take all such action as may be necessary to ensure that all
one one-thousandths of a share of Series A Preferred Stock (and, following the
occurrence of a Triggering Event, Common Stock and/or other securities)
delivered upon exercise of Rights shall, at the time of delivery of the
certificates for such shares (subject to payment of the Purchase Price), be duly
and validly authorized and issued and fully paid and non-assessable.

          (e) The Company further covenants and agrees that it will pay when due
and payable any and all federal and state transfer taxes and charges which may
be payable in respect of the issuance or delivery of the Rights Certificates or
of any certificates for a number of one one-thousandths of a share of Series A
Preferred Stock (or Common Stock and/or other securities, as the case may be)
upon the exercise of Rights.  The Company shall not, however, be required to pay
any transfer tax or charge which may be payable in respect of any transfer or
delivery of Rights Certificates to a Person other than, or the issuance or
delivery of certificates for a number of one one-thousandths of a share of
Series A Preferred Stock (or Common Stock and/or other securities, as the case
may be) in a name other than that of, the registered holder of the Rights
Certificate evidencing Rights surrendered for exercise or to issue or deliver
any certificates for a number of one one-thousandths of a share of Series A
Preferred Stock (or Common Stock and/or other securities, as the case may be) in
a name other than that of the registered holder upon the exercise of any Rights
until any such tax or charge shall have been paid (any such tax or charge being
payable by the holder of such Rights Certificate at the time of surrender) or
until it has been established to the Company's satisfaction that no such tax or
charge is due.

     SECTION 10.  SERIES A PREFERRED STOCK RECORD DATE.

          Each Person in whose name any certificate for a number of one one-
thousandths of a share of Series A Preferred Stock (or Common Stock and/or other
securities, as the case may be) is issued upon the exercise of Rights shall for
all purposes be deemed to have become the holder of record of such fractional
shares of Series A Preferred Stock (or Common Stock and/or other securities, as
the case may be) represented thereby on, and such certificate shall be dated,
the date upon which the Rights Certificate evidencing such Rights was duly
surrendered and payment of the Purchase Price (and any applicable transfer taxes
and charges) was made; provided, however, that if the date of such surrender and
                       --------  -------                                        
payment is a date upon which the Series A Preferred Stock (or Common Stock
and/or other securities as the 

                                      -17-
<PAGE>
case may be) transfer books of the Company are closed, such Person shall be
deemed to have become the record holder of such shares (fractional or otherwise)
on, and such certificate shall be dated, the next succeeding Business Day on
which the Series A Preferred Stock (or Common Stock and/or other securities as
the case may be) transfer books of the Company are open. Prior to the exercise
of the Rights evidenced thereby, the holder of a Rights Certificate shall not be
entitled to any rights of a stockholder of the Company with respect to shares
for which the Rights shall be exercisable, including, without limitation, the
right to vote, to receive dividends or other distributions or to exercise any
preemptive rights, and shall not be entitled to receive any notice of any
proceedings of the Company, except as provided herein.

     SECTION 11.  ADJUSTMENT OF PURCHASE PRICE, NUMBER AND KIND OF SHARES OR
                  NUMBER OF RIGHTS.

          The Purchase Price, the number and kind of shares covered by each
Right and the number of Rights outstanding are subject to adjustment from time
to time as provided in this Section 11.

          (a)(i)  In the event the Company shall at any time after the date of
this Agreement (A) declare a dividend on the Series A Preferred Stock payable in
shares of Series A Preferred Stock, (B) subdivide the outstanding Series A
Preferred Stock, (C) combine the outstanding Series A Preferred Stock into a
smaller number of shares or (D) issue any shares of its capital stock in a
reclassification of the Series A Preferred Stock (including any such
reclassification in connection with a consolidation or merger in which the
Company is the continuing or surviving corporation), except as otherwise
provided in this Section 11(a) and Section 7(e) hereof, the Purchase Price in
effect at the time of the record date for such dividend or of the effective date
of such subdivision, combination or reclassification, and the number and kind of
shares of Series A Preferred Stock or the number and kind of shares of capital
stock issuable on such date, as the case may be, shall be proportionately
adjusted so that the holder of any Right exercised after such time shall be
entitled to receive, upon payment of the aggregate adjusted Purchase Price then
in effect necessary to exercise a Right in full, the aggregate number and kind
of shares of Series A Preferred Stock or the number and kind of shares of
capital stock, as the case may be, which, if such Right had been exercised
immediately prior to such date and at a time when the Series A Preferred Stock
(or other capital stock, as the case may be) transfer books of the Company were
open, he would have owned upon such exercise and been entitled to receive by
virtue of such dividend, subdivision, combination, or reclassification.  If an
event occurs which would require an adjustment under both this Section 11(a)(i)
and Section 11(a)(ii) hereof, the adjustment provided for in this Section
11(a)(i) shall be in addition to, and shall be made prior to, any adjustment
required pursuant to Section 11(a)(ii) hereof.

                                      -18-
<PAGE>
 
          (ii) Subject to Sections 23 and 24 of this Agreement, in the event
that any Person, alone or together with its Affiliates and Associates, shall, at
any time after the Rights Dividend Declaration Date, become an Acquiring Person,
unless the event causing such Person to become an Acquiring Person is (x) a
Section 13 Event or (y) an acquisition of shares of Common Stock pursuant to a
cash tender offer made pursuant to Section 14(d) of the Exchange Act for all
outstanding shares of Common Stock (other than shares of Common Stock
beneficially owned by the Person making the offer or by its Affiliates or
Associates) at a price and on terms determined by at least two-thirds of the
Board, after receiving advice from one or more investment banking firms, to be
(a) fair to stockholders (taking into account all factors which such members of
the Board deem relevant, including, without limitation, prices which could
reasonably be achieved if the Company or its assets were sold on an orderly
basis designed to realize maximum value) and (b) otherwise in the best interests
of the Company and its stockholders, then promptly after the date of occurrence
of a Section 11(a)(ii) Event, proper provision shall be made so that each holder
of a Right (except as provided below and in Section 7(e) hereof) shall
thereafter have the right to receive, upon exercise thereof and payment of an
amount equal to the then current Purchase Price in accordance with the terms of
this Agreement, in lieu of a number of one one-thousandths of a share of Series
A Preferred Stock, such number of shares of Common Stock of the Company as shall
equal the result obtained by (x) multiplying the then current Purchase Price by
the then number of one one-thousandths of a share of Series A Preferred Stock
for which a Right was or would have been exercisable immediately prior to the
first occurrence of a Section 11(a)(ii) Event, whether or not such Right was
then exercisable, and (y) dividing that product (which, following such first
occurrence, shall thereafter be referred to as the "Purchase Price" for each
Right and for all purposes of this Agreement except to the extent set forth in
Section 13 thereof) by 50% of the current market price per share of Common Stock
(determined pursuant to Section 11(d) hereof) on the date of such first
occurrence (such number of shares, the "Adjustment Shares").

          (iii)    The Company may at its option substitute for a share of
Common Stock issuable upon the exercise of Rights in accordance with the
foregoing subparagraph (ii) such number or fractions of shares of Series A
Preferred Stock having an aggregate market value equal to the current per share
market price of a share of Common Stock.  In the event that the number of shares
of Common Stock which is authorized by the Company's Articles of Incorporation,
as amended from time to time, but not outstanding, or reserved for issuance for
purposes other than upon exercise of the Rights, is not sufficient to permit the
exercise in full of the Rights in accordance with the foregoing subparagraph
(ii), the Board shall, to the extent permitted by applicable law and any
material agreements or material instruments then in effect to which the Company
is a party, (A) determine the excess of (1) the value of the Adjustment Shares
issuable upon the exercise of a Right (the "Current Value") over (2) the
Purchase Price (such excess, the "Spread"), and (B) with respect to each Right
(subject to Section 7(e) 

                                      -19-
<PAGE>
 
hereof), make adequate provision to substitute for some or all of the Adjustment
Shares, upon exercise of a Right and payment of the applicable Purchase Price,
(1) cash, (2) a reduction in the Purchase Price, (3) Common Stock or other
equity securities of the Company (including, without limitation, shares, or
units of shares, of Series A Preferred Stock which the Board has deemed to have
the same value as shares of Common Stock) (such shares of equity securities
being herein called "Stock Equivalents"), (4) debt securities of the Company,
(5) other assets, or (6) any combination of the foregoing, having an aggregate
value equal to the Current Value, where such aggregate value has been determined
by the Board based upon the advice of an investment banking firm selected by the
Board; provided, however, if the Company shall not have made adequate provision
       --------  -------                
to deliver value pursuant to clause (B) above within thirty (30) days following
the later of (x) the first occurrence of a Section 11(a)(ii) Event and (y) the
date on which the Company's right of redemption pursuant to Section 23(a)
expires (the later of (x) and (y) being referred to herein as the "Section
11(a)(ii) Trigger Date"), then the Company shall be obligated to deliver, upon
the surrender for exercise of a Right and without requiring payment of the
Purchase Price, shares of Common Stock (to the extent available) and then, if
necessary, cash, which shares and/or cash have an aggregate value equal to the
Spread.

          If, upon the occurrence of a Section 11(a)(ii) Event, the Board shall
determine in good faith that it is likely that sufficient additional shares of
Common Stock could be authorized for issuance upon exercise in full of the
Rights, then if the Board so elects, the thirty (30) day period set forth above
may be extended to the extent necessary, but not more than ninety (90) days
after the Section 11(a)(ii) Trigger Date, in order that the Company may seek
stockholder approval for the authorization of such additional shares (such
period, as it may be extended, the "Substitution Period").  To the extent that
action is to be taken pursuant to the preceding provisions of this Section
11(a)(iii), the Company (x) shall provide, subject to Section 7(e) hereof, that
such action shall apply uniformly to all outstanding Rights, and (y) may suspend
the exercisability of the Rights until the expiration of the Substitution Period
in order to seek any authorization of additional shares and/or to decide the
appropriate form of distribution to be made pursuant to the first sentence of
this Section 11(a)(iii) and to determine the value thereof.  In the event of any
such suspension, the Company shall issue a public announcement stating that the
exercisability of the Rights has been temporarily suspended, as well as a public
announcement at such time as the suspension is no longer in effect.  For
purposes of this Section 11(a)(iii), the value of the Common Stock shall be the
current market price (as determined pursuant to Section 11(d) hereof) per share
of the Common Stock on the Section 11(a)(ii) Trigger Date and the value of any
Stock Equivalent shall be deemed to have the same value as the Common Stock on
such date.  The Board may, but shall not be required to, establish procedures to
allocate the right to receive shares of Common Stock upon the exercise of the
Rights among holders of Rights pursuant to this Section 11(a)(iii).

                                      -20-
<PAGE>
 
          (b) In case the Company shall fix a record date for the issuance of
rights, options or warrants to all holders of Series A Preferred Stock entitling
them (for a period expiring within forty-five (45) calendar days after such
record date) to subscribe for or purchase Series A Preferred Stock (or shares
having the same preferences, conversion or other rights, voting powers,
restrictions, limitations as to dividends, qualifications, and terms or
conditions or redemption as the shares of Series A Preferred Stock ("Equivalent
Preferred Stock") or securities convertible into Series A Preferred Stock at a
price per share of Series A Preferred Stock or per share of Equivalent Preferred
Stock (or having a conversion price per share of Series A Preferred Stock, if a
security convertible into Series A Preferred Stock) less than the current per
share market price of the Series A Preferred Stock (as defined in Section 11(d))
on such record date, the Purchase Price to be in effect after such record date
shall be determined by multiplying the Purchase Price in effect immediately
prior to such record date by a fraction, the numerator of which shall be the
number of shares of Series A Preferred Stock outstanding on such record date,
plus the number of shares of Series A Preferred Stock which the aggregate
offering price of the total number of shares of Series A Preferred Stock and/or
Equivalent Preferred Stock so to be offered (and/or the aggregate initial
conversion price of the convertible securities so to be offered) would purchase
at such current market price, and the denominator of which shall be the number
of shares of Series A Preferred Stock outstanding on such record date, plus the
number of additional shares of Series A Preferred Stock and/or Equivalent
Preferred Stock to be offered for subscription or purchase (or into which the
convertible securities so to be offered are initially convertible).  In case
such subscription price may be paid in a consideration part or all of which
shall be in a form other than cash, the value of such consideration shall be as
determined in good faith by the Board, whose determination shall be described in
a statement filed with the Rights Agent and shall be conclusive for all
purposes.  Shares of Series A Preferred Stock owned by or held for the account
of the Company shall not be deemed outstanding for the purpose of any such
computation.  Such adjustment shall be made successively whenever such a record
date is fixed; and in the event that such rights or warrants are not so issued,
the Purchase Price shall be adjusted to be the Purchase Price which would then
be in effect if such record date had not been fixed.

          (c) In case the Company shall fix a record date for a distribution to
all holders of Series A Preferred Stock (including any such distribution made in
connection with a consolidation or merger in which the Company is the continuing
or surviving corporation) of evidences of indebtedness, cash (other than a
regular quarterly cash dividend out of the earnings or retained earnings of the
Company), assets (other than a dividend payable in Series A Preferred Stock, but
including any dividend payable in stock other than Series A Preferred Stock), or
subscription rights or warrants (excluding those referred to in Section 11(b)),
the Purchase Price to be in effect after such record date shall be determined by
multiplying the Purchase Price in effect immediately prior to such record date
by a fraction, the numerator of which shall be the current per share market
price of the Series A 

                                      -21-
<PAGE>
 
Preferred Stock (as defined in Section 11(d)) on such record date, less the fair
market value (as determined in good faith by the Board, whose determination
shall be described in a statement filed with the Rights Agent and shall be
conclusive for all purposes) of the portion of the cash, assets or evidences of
indebtedness so to be distributed or of such subscription rights or warrants
applicable to a share of Series A Preferred Stock and the denominator of which
shall be such current per share market price of the Series A Preferred Stock.
Such adjustment shall be made successively whenever such a record date is fixed;
and in the event that such distribution is not so made, the Purchase Price shall
again be adjusted to be the Purchase Price which would then be in effect if such
record date had not been fixed.

          (d) (i) For the purpose of any computation hereunder, the "current
market price" of the Common Stock on any date shall be deemed to be the average
of the daily closing prices per share of such Common Stock for the 30
consecutive Trading Days (as defined herein) immediately prior to but not
including such date, and for purposes of computations made pursuant to Section
11(a)(iii) hereof, the "current market price" per share of Common Stock on any
date shall be deemed to be the average of the daily closing prices per share of
Common Stock for the ten (10) consecutive Trading Days immediately following but
not including such date; provided, however, that in the event that the current
                         --------  -------                                    
market price of the Common Stock is determined during a period following the
announcement by the issuer of such Common Stock of (i) a dividend or
distribution on such Common Stock payable in shares of such Common Stock or
securities convertible into such Common Stock (other than the Rights), or 
(ii) any subdivision, combination or reclassification of such Common Stock, and
prior to the expiration of the requisite thirty (30) Trading Day or ten (10)
Trading Day period, as set forth above, after the ex-dividend date for such
dividend or distribution, or the record date for such subdivision, combination
or reclassification, then, and in each such case, the "current market price"
shall be appropriately adjusted to take into account ex-dividend trading. The
closing price for each day shall be the last sale price, regular way, or, in
case no such sale takes place on such day, the average of the closing bid and
asked prices, regular way, in either case as reported in the principal
consolidated transaction reporting system with respect to securities listed or
admitted to trading on the New York Stock Exchange or, if the shares of Common
Stock are not listed or admitted to trading on the New York Stock Exchange, as
reported in the principal consolidated transaction reporting system with respect
to securities listed on the principal national securities exchange on which the
shares of Common Stock are listed or admitted to trading or, if the shares of
Common Stock are not listed or admitted to trading on any national securities
exchange, the last quoted price or, if not so quoted, the average of the high
bid and low asked prices in the over-the-counter market, as reported by the
National Association of Securities Dealers, Inc. Automated Quotations System
("NASDAQ") or such other system then in use, or, if on any such date the shares
of Common Stock are not quoted by any such organization, the average of the
closing bid and asked prices as furnished by a professional market maker making
a market in the shares of Common Stock 

                                      -22-
<PAGE>
 
selected by the Board. If on any such date no market maker is making a market in
the Common Stock, the fair value of such shares on such date as determined in
good faith by the Board shall be used. The term "Trading Day" shall mean a day
on which the principal national securities exchange on which the shares of
Common Stock are listed or admitted to trading is open for the transaction of
business, or, if the shares of Common Stock are not listed or admitted to
trading on any national securities exchange, the term "Trading Day" shall mean a
Monday, Tuesday, Wednesday, Thursday or Friday on which banking or trust
institutions in the State of New York are not authorized or obligated by law or
executive order to close. If the Common Stock is not publicly held or not listed
or traded, "current market price" shall mean the fair value per share as
determined in good faith by the Board, whose determination shall be described in
a statement filed with the Rights Agent and shall be conclusive for all
purposes.

          (ii) For the purpose of any computation hereunder, the "current market
price" per share of Series A Preferred Stock shall be determined in the same
manner as set forth above for the Common Stock in clause (i) of this Section
11(d) (other than the last sentence thereof).  If the current market price per
share of Series A Preferred Stock cannot be determined in the manner provided
above or if the Series A Preferred Stock is not publicly held or listed or
traded in a manner described in clause (i) of this Section 11(d), the "current
market price" per share of Series A Preferred Stock shall be conclusively deemed
to be an amount equal to 1,000 (as such number may be appropriately adjusted for
such events as stock splits, stock dividends and recapitalizations with respect
to the Common Stock occurring after the date of this Agreement) multiplied by
the current market price per share of the Common Stock.  If neither the Common
Stock nor the Series A Preferred Stock is publicly held or so listed or traded,
"current market price" per share of the Series A Preferred Stock shall mean the
fair value per share as determined in good faith by the Board, whose
determination shall be described in a statement filed with the Rights Agent and
shall be conclusive for all purposes.  For all purposes of this Agreement, the
"current market price" of one one-thousandth of a share of Series A Preferred
Stock shall be equal to the "current market price" of one share of Series A
Preferred Stock divided by 1,000.

          (e) Anything herein to the contrary notwithstanding, no adjustment in
the Purchase Price shall be required unless such adjustment would require an
increase or decrease of at least one percent (1%) in such price; provided,
                                                                 -------- 
however, that any adjustments which by reason of this Section 11(e) are not
- -------                                                                    
required to be made shall be carried forward and taken into account in any
subsequent adjustment.  All calculations under this Section 11 shall be made to
the nearest cent or to the nearest ten-thousandth of a share of Common Stock or
other share or one one-millionth of a share of Series A Preferred Stock, as the
case may be.  Notwithstanding the first sentence of this Section 11(e), an
adjustment required by this Section 11 shall be made no later than the earlier
of (i) three years from the date of the transaction which requires such
adjustment or (ii) the Expiration Date.

                                      -23-
<PAGE>
 
          (f) If as a result of an adjustment made pursuant to Section 11(a)(ii)
or Section 13(a) hereof, the holder of any Right thereafter exercised shall
become entitled to receive any shares of capital stock of the Company other than
Series A Preferred Stock, thereafter the number of such other shares so
receivable upon exercise of any Right and the Purchase Price thereof shall be
subject to adjustment from time to time in a manner and on terms as nearly
equivalent as practicable to the provisions with respect to the Series A
Preferred Stock contained in Sections 11(a), (b), (c), (e), (g), (h), (i), (j),
(k) and (m), and the provisions of Sections 7, 9, 10, 13 and 14 hereof with
respect to the Series A Preferred Stock shall apply on like terms to any such
other shares.

          (g) All Rights originally issued by the Company subsequent to any
adjustment made to the Purchase Price hereunder shall evidence the right to
purchase, at the adjusted Purchase Price, the number of one one-thousandths of a
share of Series A Preferred Stock purchasable from time to time hereunder upon
exercise of the Rights, all subject to further adjustment as provided herein.

          (h) Unless the Company shall have exercised its election as provided
in Section 11(i), upon each adjustment of the Purchase Price as a result of the
calculations made in Sections 11(b) and (c), each Right outstanding immediately
prior to the making of such adjustment shall thereafter evidence the right to
purchase, at the adjusted Purchase Price, that number of one one-thousandths of
a share of Series A Preferred Stock (calculated to the nearest one one-
millionth) obtained by (i) multiplying (x) the number of one one-thousandths of
a share covered by a Right immediately prior to this adjustment by (y) the
Purchase Price in effect immediately prior to such adjustment of the Purchase
Price and (ii) dividing the product so obtained by the Purchase Price in effect
immediately after such adjustment of the Purchase Price.

          (i) The Company may elect on or after the date of any adjustment of
the Purchase Price to adjust the number of Rights, in lieu of any adjustment in
the number of one one-thousandths of a share of Series A Preferred Stock
issuable upon the exercise of a Right.  Each of the Rights outstanding after
such adjustment of the number of Rights shall be exercisable for the number of
one one-thousandths of a share of Series A Preferred Stock for which a Right was
exercisable immediately prior to such adjustment.  Each Right held of record
prior to such adjustment of the number of Rights shall become that number of
Rights (calculated to the nearest ten-thousandth) obtained by dividing the
Purchase Price in effect immediately prior to adjustment of the Purchase Price
by the Purchase Price in effect immediately after adjustment of the Purchase
Price.  The Company shall make a public announcement of its election to adjust
the number of Rights, indicating the record date for the adjustment, and, if
known at the time, the amount of the adjustment to be made.  This record date
may be the date on which the Purchase Price is adjusted or any day thereafter,
but, if the Rights Certificates have been issued, shall be at least ten (10)
days later than the date of the public announcement.  If Rights 

                                      -24-
<PAGE>
 
Certificates have been issued, upon each adjustment of the number of Rights
pursuant to this Section 11(i), the Company shall, as promptly as practicable,
cause to be distributed to holders of record of Rights Certificates on such
record date Rights Certificates evidencing, subject to Section 14 hereof, the
additional Rights to which such holders shall be entitled as a result of such
adjustment, or, at the option of the Company, shall cause to be distributed to
such holders of record in substitution and replacement for the Rights
Certificates held by such holders prior to the date of adjustment, and upon
surrender thereof, if required by the Company, new Rights Certificates
evidencing all the Rights to which such holders shall be entitled after such
adjustment. Rights Certificates so to be distributed shall be issued, executed
and countersigned in the manner provided for herein (and may bear, at the option
of the Company, the adjusted Purchase Price) and shall be registered in the
names of the holders of record of Rights Certificates on the record date
specified in the public announcement.

          (j) Irrespective of any adjustment or change in the Purchase Price or
the number of one one-thousandths of a share of Series A Preferred Stock
issuable upon the exercise of the Rights, the Rights Certificates theretofore
and thereafter issued may continue to express the Purchase Price per one one-
thousandth of a share and the number of one one-thousandths of a share which
were expressed in the initial Rights Certificates issued hereunder.

          (k) Before taking any action that would cause an adjustment reducing
the Purchase Price below the then-par value, if any, of the number of one one-
thousandths of a share of Series A Preferred Stock issuable upon exercise of the
Rights, the Company shall take any corporate action which may, in the opinion of
its counsel, be necessary in order that the Company may validly and legally
issue fully paid and non-assessable such number of one one-thousandths of a
share of Series A Preferred Stock at such adjusted Purchase Price.

          (l) In any case in which this Section 11 shall require that an
adjustment in the Purchase Price be made effective as of a record date for a
specified event, the Company may elect to defer until the occurrence of such
event the issuance to the holder of any Right exercised after such record date
the number of one one-thousandths of a share of Series A Preferred Stock and
other capital stock or securities of the Company, if any, issuable upon such
exercise over and above the number of one one-thousandths of a share of Series A
Preferred Stock and other capital stock or securities of the Company, if any,
issuable upon such exercise on the basis of the Purchase Price in effect prior
to such adjustment; provided, however, that the Company shall deliver to such
                    --------  -------                                        
holder a due bill or other appropriate instrument evidencing such holder's right
to receive such additional shares (fractional or otherwise) or securities upon
the occurrence of the event requiring such adjustment.

                                      -25-
<PAGE>
 
          (m) Anything in this Section 11 to the contrary notwithstanding, the
Company shall be entitled to make such reductions in the Purchase Price, in
addition to those adjustments expressly required by this Section 11, as and to
the extent that the Board in its sole discretion shall determine to be advisable
in order that any (i) consolidation or subdivision of the Series A Preferred
Stock, (ii) issuance wholly for cash of any shares of Series A Preferred Stock
at less than the current market price, (iii) issuance wholly for cash of shares
of Series A Preferred Stock or securities which by their terms are convertible
into or exchangeable for Series A Preferred Stock, (iv) stock dividends or (v)
issuance of rights, options or warrants referred to hereinabove in this Section
11, hereafter made by the Company to holders of its Series A Preferred Stock
shall not be taxable to such stockholders.

          (n) The Company covenants and agrees that it shall not, at any time
after the Distribution Date, (i) consolidate with any other Person (other than a
Subsidiary of the Company in a transaction which complies with Section 11(o)
hereof), (ii) merge with or into any other Person (other than a Subsidiary of
the Company in a transaction which complies with Section 11(o) hereof), or 
(iii) sell or transfer (or permit any Subsidiary to sell or transfer), in one
transaction, or a series of related transactions, assets or earning power
aggregating more than 50% of the assets or earning power of the Company and its
Subsidiaries (taken as a whole) to any other Person or Persons (other than the
Company and/or any of its Subsidiaries in one or more transactions each of which
complies with Section 11(o) hereof), if (x) at the time of or immediately after
such consolidation, merger, sale or transfer there are any rights, warrants or
other instruments or securities outstanding or agreements in effect which would
substantially diminish or otherwise eliminate the benefits intended to be
afforded by the Rights or (y) prior to, simultaneously with or immediately after
such consolidation, merger, sale or transfer, the stockholders of the Person who
constitutes, or would constitute, the "Principal Party" for purposes of Section
13(a) hereof shall have received a distribution of Rights previously owned by
such Person or any of its Affiliates and Associates.

          (o) The Company covenants and agrees that, after the Distribution
Date, it will not, except as permitted by Section 23 or Section 27 hereof, take
(or permit any Subsidiary to take) any action if at the time such action is
taken it is reasonably foreseeable that such action will diminish substantially
or otherwise eliminate the benefits intended to be afforded by the Rights.

          (p) Anything in this Agreement to the contrary notwithstanding, in the
event that the Company shall at any time after the Rights Dividend Declaration
Date and prior to the Distribution Date (i) declare a dividend on the
outstanding shares of Common Stock payable in shares of Common Stock, 
(ii) subdivide the outstanding shares of Common Stock, or (iii) combine the
outstanding shares of Common Stock into a smaller number of shares, the number
of Rights associated with each share of Common Stock then outstanding, or issued
or delivered thereafter but prior to the Distribution Date, shall be
proportionately adjusted so 

                                      -26-
<PAGE>
 
that the number of Rights thereafter associated with each share of Common Stock
following any such event shall equal the result obtained by multiplying the
number of Rights associated with each share of Common Stock immediately prior to
such event by a fraction the numerator of which shall be the total number of
shares of Common Stock outstanding immediately prior to the occurrence of the
event and the denominator of which shall be the total number of shares of Common
Stock outstanding immediately following the occurrence of such event.

     SECTION 12.  CERTIFICATE OF ADJUSTED PURCHASE PRICE OR NUMBER OF SHARES.

          Whenever an adjustment is made as provided in Sections 11 or 13
hereof, the Company shall (a) promptly prepare a certificate setting forth such
adjustment, and a brief statement of the facts and computations accounting for
such adjustment, (b) promptly file with the Rights Agent and with each transfer
agent for the Series A Preferred Stock and the Common Stock a copy of such
certificate and (c) mail or deliver a brief summary thereof to each holder of a
Rights Certificate (or, if prior to the Distribution Date, to each holder of a
certificate representing shares of Common Stock) in accordance with Section 25
hereof.  The Rights Agent shall be fully protected in relying on any such
certificate and on any adjustment therein contained and shall not be deemed to
have knowledge of any adjustment unless and until it shall have received such
certificate.

     SECTION 13.  CONSOLIDATION, MERGER OR SALE OR TRANSFER OF ASSETS OR EARNING
                  POWER.

          (a) Subject to Section 23 of this Agreement, in the event that,
following the Stock Acquisition Date, directly or indirectly, (x) the Company
shall consolidate with, or merge with and into, any other Person (other than a
Subsidiary of the Company in a transaction which complies with Section 11(o)
hereof), and the Company shall not be the continuing or surviving corporation of
such consolidation or merger, (y) any Person (other than a Subsidiary of the
Company in a transaction which complies with Section 11(o) hereof) shall
consolidate with, or merge with or into, the Company, and the Company shall be
the continuing or surviving corporation of such consolidation or merger and, in
connection with such consolidation or merger, all or part of the outstanding
shares of Common Stock shall be changed into or exchanged for stock or other
securities of any other Person or cash or any other property, or (z) the Company
shall sell or otherwise transfer (or one or more of its Subsidiaries shall sell
or otherwise transfer), in one transaction or a series of related transactions,
assets or earning power aggregating more than 50% of the assets or earning power
of the Company and its Subsidiaries (taken as a whole) to any Person or Persons
(other than the Company or any Subsidiary of the Company in one or more
transactions each of which complies with Section 11(o) hereof), then, and in
each such case (except as may be contemplated by 

                                      -27-
<PAGE>
 
Section 13(d) hereof), proper provision shall be made so that: (i) each holder
of a Right, except as provided in Section 7(e) hereof, shall, upon the
expiration of the Redemption Period (as defined in Section 23(a)), thereafter
have the right to receive, upon the exercise thereof at the then current
Purchase Price in accordance with the terms of this Agreement, such number of
validly authorized and issued, fully paid, non-assessable and freely tradable
shares of Common Stock of the Principal Party (as defined herein), not subject
to any liens, encumbrances, rights of first refusal or other adverse claims, as
shall be equal to the result obtained by (1) multiplying the then current
Purchase Price by the number of one one-thousandths of a share of Series A
Preferred Stock for which a Right was exercisable immediately prior to the first
occurrence of a Section 13 Event (or, if a Section 11(a)(ii) Event has occurred
prior to the first occurrence of a Section 13 Event, multiplying the number of
one one-thousandths of a share of Series A Preferred Stock for which a Right was
exercisable immediately prior to the first occurrence of a Section 11(a)(ii)
Event by the Purchase Price in effect immediately prior to such first
occurrence), and (2) dividing that product (which product, following the first
occurrence of a Section 13 Event, shall be referred to as the "Purchase Price"
for each Right and for all purposes of this Agreement) by 50% of the current
market price per share of the shares of Common Stock of such Principal Party on
the date of consummation of such Section 13 Event (or the fair market value on
such date of other securities or property of the Principal Party, as provided
for herein); (ii) such Principal Party shall thereafter be liable for, and shall
assume, by virtue of such Section 13 Event, all the obligations and duties of
the Company pursuant to this Agreement; (iii) the term "Company" shall
thereafter be deemed to refer to such Principal Party, it being specifically
intended that the provisions of Section 11 hereof (other than Sections 11(a)(ii)
and 11(a)(iii)) shall apply only to such Principal Party following the first
occurrence of a Section 13 Event; (iv) such Principal Party shall take such
steps (including, but not limited to, the reservation of a sufficient number of
shares of its Common Stock) in connection with the consummation of any such
transaction as may be necessary to assure that the provisions hereof shall
thereafter be applicable, as nearly as reasonably may be, in relation to its
shares of Common Stock thereafter deliverable upon the exercise of the Rights;
and (v) the provisions of Section 11(a)(ii) and Section 11(a)(iii) hereof shall
be of no effect following the first occurrence of any Section 13 Event.

         (b)  "Principal Party" shall mean

              (i)  in the case of any transaction described in clause (x) or (y)
         of the first sentence of Section 13(a), the Person that is the issuer
         of any securities into which shares of Common Stock of the Company are
         converted in such merger or consolidation, and if no securities are so
         issued, the Person that is the other party to such merger or
         consolidation; and

                                      -28-
<PAGE>
 
              (ii)  in the case of any transaction described in clause (z) of
         the first sentence of Section 13(a), the Person that is the party
         receiving the greatest portion of the assets or earning power
         transferred pursuant to such transaction or transactions;

provided, however, that in any such case, (1) if the Common Stock of such Person
- --------  -------                                                               
is not at such time and has not been continuously over the preceding twelve (12)
month period registered under Section 12 of the Exchange Act, and such Person is
a direct or indirect Subsidiary of another Person the Common Stock of which is
and has been so registered, "Principal Party" shall refer to such other Person;
and (2) in case such Person is a Subsidiary, directly or indirectly, of more
than one Person, the Common Stocks of two or more of which are and have been so
registered, "Principal Party" shall refer to whichever of such Persons is the
issuer of the Common Stock having the greatest aggregate market value.

          (c) The Company shall not consummate any Section 13 Event unless the
Principal Party shall have a sufficient number of authorized shares of its
Common Stock which have not been issued or reserved for issuance to permit the
exercise in full of the Rights in accordance with this Section 13 and unless
prior thereto the Company and such Principal Party shall have executed and
delivered to the Rights Agent a supplemental agreement providing for the terms
set forth in paragraphs (a) and (b) of this Section 13 and further providing
that, as soon as practicable after the date of any such Section 13 Event, the
Principal Party will:

              (i)  prepare and file a registration statement under the
         Securities Act, with respect to the Rights and the securities
         purchasable upon exercise of the Rights on an appropriate form, and
         will use its best efforts to cause such registration statement to (A)
         become effective as soon as practicable after such filing and (B)
         remain effective (with a prospectus at all times meeting the
         requirements of the Securities Act) until the Expiration Date;

              (ii)  deliver to holders of the Rights historical financial
         statements for the Principal Party and each of its Affiliates which
         comply in all respects with the requirements for registration on Form
         10 under the Exchange Act;

              (iii)  use its best efforts to obtain any necessary regulatory
         approvals in respect of the securities purchasable upon exercise of
         outstanding Rights; and

              (iv)  use its best efforts, if such Common Stock of the Principal
         Party shall be listed or admitted to trading on the New York Stock
         Exchange or on another national securities exchange, to list or admit
         to trading (or continue the listing of) the Rights and the securities

                                      -29-
<PAGE>
 
         purchasable upon exercise of the Rights on the New York Stock Exchange
         or such securities exchange, or, if the securities of the Principal
         Party purchasable upon exercise of the Rights shall not be listed or
         admitted to trading on the New York Stock Exchange or a national
         securities exchange, to cause the Rights and the securities purchasable
         upon exercise of the Rights to be reported by such other system then in
         use.

The provisions of this Section 13 shall similarly apply to successive mergers or
consolidations or sales or other transfers.  In the event that a Section 13
Event shall occur at any time after the occurrence of a Section 11(a)(ii) Event,
the Rights which have not theretofore been exercised shall thereafter become
exercisable in the manner described in Section 13(a) hereof.

          (d) Notwithstanding anything in this Agreement to the contrary,
Section 13 shall not be applicable to a transaction described in subparagraphs
(x) and (y) of Section 13(a) if (i) such transaction is consummated with a
Person or Persons (or a wholly owned subsidiary of any such Person or Persons)
who acquired shares of Common Stock pursuant to a cash tender offer for all
outstanding shares of Common Stock which complies with the provisions of Section
11(a)(ii) hereof, (ii) the price per share of Common Stock offered in such
transaction is not less than the price per share of Common Stock paid to all
holders of Common Stock whose shares were purchased pursuant to such cash tender
offer and (iii) the form of consideration being offered to the remaining holders
of shares of Common Stock pursuant to such transaction is the same as the form
of consideration paid pursuant to such cash tender offer.  Upon consummation of
any such transaction contemplated by this Section 13(d), all Rights hereunder
shall expire.

     SECTION 14.  FRACTIONAL RIGHTS AND FRACTIONAL SHARES.

          (a) The Company shall not be required to issue fractions of Rights
except prior to the Distribution Date as provided in Section 11(p) hereof, or to
distribute Rights Certificates which evidence fractional Rights.  In lieu of
such fractional Rights, there shall be paid to the registered holders of the
Rights Certificates with regard to which such fractional Rights would otherwise
be issuable, an amount in cash equal to the same fraction of the current market
value of the whole Right.  For the purposes of this Section 14(a), the current
market value of a whole Right shall be the closing price of the Rights for the
Trading Day immediately prior to the date on which such fractional Rights would
have been otherwise issuable.  The closing price for any day shall be the last
sale price, or, in case no such sale takes place on such day, the average of the
high bid and low asked prices, in either case as reported by the New York Stock
Exchange or, if the Rights are not listed or admitted to trading on the New York
Stock Exchange, as reported in the principal consolidated transaction reporting
system with respect to securities 

                                      -30-
<PAGE>
 
listed on the principal national securities exchange on which the Rights are
listed or admitted to trading, or such other system then in use or, if on any
such date the Rights are not quoted by any such organization, the average of the
closing bid and asked prices as furnished by a professional market maker making
a market in the Rights selected by the Board. If on any such date no such market
maker is making a market in the Rights the fair value of the Rights on such date
as determined in good faith by the Board shall be used. In the event the Rights
are listed or admitted to trading on a national securities exchange, the closing
price for any day shall be the last sale price, regular way, or, in case no such
sale takes place on such day, the average of the high bid and low asked prices,
regular way, in either case as reported in the principal consolidated
transaction reporting system with respect to the national securities exchange on
which the Rights are listed or admitted to trading.

          (b) The Company shall not be required to issue fractions of shares of
Series A Preferred Stock (other than fractions which are integral multiples of
one one-thousandth of a share of Series A Preferred Stock) upon exercise of the
Rights or to distribute certificates which evidence fractional shares of Series
A Preferred Stock (other than fractions which are integral multiples of one one-
thousandth of a share of Series A Preferred Stock).  In lieu of fractional
shares of Series A Preferred Stock that are not integral multiples of one one-
thousandth of a share of Series A Preferred Stock, the Company may pay to the
registered holders of Rights Certificates at the time such Rights are exercised
as herein provided an amount in cash equal to the same fraction of the current
market value of one one-thousandth of a share of Series A Preferred Stock.  For
purposes of this Section 14(b), the current market value of one one-thousandth
of a share of Series A Preferred Stock shall be one one-thousandth of the
closing price of a share of Series A Preferred Stock (as determined pursuant to
Section 11(d)(ii) hereof) for the Trading Day immediately prior to the date of
such exercise.

          (c) Following the occurrence of one of the events specified in Section
11 giving rise to the right to receive Common Stock, Stock Equivalents or other
securities upon the exercise of a Right, the Company shall not be required to
issue fractions of shares of Common Stock, Stock Equivalents or other securities
upon exercise of the Rights or to distribute certificates which evidence
fractional shares of Common Stock, Stock Equivalents or other securities.  In
lieu of fractional shares of Common Stock, Stock Equivalents or other securities
the Company may pay to the registered holders of Rights Certificates at the time
such Rights are exercised as herein provided an amount in cash equal to the same
fraction of the current market value of one (1) share of Common Stock, Stock
Equivalents or other securities.  For purposes of this Section 14(c), the
current market value of one share of Common Stock shall be the closing price of
one share of Common Stock (as determined pursuant to Section 11(d)(i) hereof)
for the Trading Day immediately prior to the date of such exercise.

                                      -31-
<PAGE>
 
          (d) The holder of a Right by the acceptance of the Rights expressly
waives his right to receive any fractional Rights or any fractional shares upon
exercise of a Right, except as permitted by this Section 14.

     SECTION 15.  RIGHTS OF ACTION.

          All rights of action in respect of this Agreement, except the rights
of action vested in the Rights Agent pursuant to Section 18 and Section 19
hereof, are vested in the respective registered holders of the Rights
Certificates (and, prior to the Distribution Date, the registered holders of the
Common Stock); and any registered holder of any Rights Certificate (or, prior to
the Distribution Date, of the Common Stock), without the consent of the Rights
Agent or of the holder of any other Rights Certificate (or, prior to the
Distribution Date, of the Common Stock), may, in his own behalf and for his 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 right to
exercise the Rights evidenced by such Rights Certificate in the manner provided
in such Rights Certificate and 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 will be entitled to specific performance of
the obligations under, and injunctive relief against actual or threatened
violations of, the obligations hereunder of any Person subject to this
Agreement.

     SECTION 16.  AGREEMENT OF RIGHTS HOLDERS.

          Every holder of a Right by accepting the same consents and agrees with
the Company and the Rights Agent and with every other holder of a Right that:

          (a) prior to the Distribution Date, the Rights will be transferable
only in connection with the transfer of the Common Stock;

          (b) after the Distribution Date, the Rights Certificates are
transferable only on the registry books of the Rights Agent if surrendered at
the office of the Rights Agent designated for such purposes, duly endorsed or
accompanied by a proper instrument of transfer and with the appropriate form of
assignment and the certificate contained therein duly completed and executed;

          (c) subject to Section 6(a) and Section 7(f) hereof, the Company and
the Rights Agent may deem and treat the Person in whose name the Rights
Certificate (or, prior to the Distribution Date, the associated Common Stock
certificate) is registered as the absolute owner thereof and of the Rights
evidenced thereby (notwithstanding any notations of ownership or writing on the
Rights 

                                      -32-
<PAGE>
 
Certificates or the associated Common Stock certificate made by anyone other
than the Company or the Rights Agent) for all purposes whatsoever, and neither
the Company nor the Rights Agent, subject to the last sentence of Section 7(e)
hereof, shall be affected by any notice to the contrary; 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 preliminary or permanent
injunction or other order, decree, judgment or ruling (whether interlocutory or
final) 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 government
authority, prohibiting or otherwise restraining performance of such obligation;
provided, however, the Company must use its best efforts to have any such order,
- --------  -------                                                               
decree or ruling lifted or otherwise overturned as soon as possible.

     SECTION 17.  RIGHTS CERTIFICATE HOLDER NOT DEEMED A STOCKHOLDER.

          No holder, as such, of any Rights Certificate shall be entitled to
vote, receive dividends or be deemed for any purpose the holder of the Series A
Preferred Stock or any other securities of the Company which may at any time be
issuable on the exercise of the Rights represented thereby, nor shall anything
contained herein or in any Rights Certificate be construed to confer upon the
holder of any Rights Certificate, as such, any of the rights of a stockholder of
the Company or any right to vote for the election of directors or upon any
matter submitted to stockholders at any meeting thereof, or to give or withhold
consent to any corporate action, or to receive notice of meetings or other
actions affecting stockholders (except as provided in Section 25 hereof), or to
receive dividends or subscription rights, or otherwise, until the Right or
Rights evidenced by such Rights Certificate shall have been exercised in
accordance with the provisions hereof.

     SECTION 18.  DUTIES OF RIGHTS AGENT.

          The Rights Agent undertakes only the duties and obligations expressly
imposed by this Agreement upon the following terms and conditions, by all of
which the Company and the holders of Rights Certificates, by their acceptance
thereof, shall be bound:

          (a) The Rights Agent may consult with legal counsel (who may be legal
counsel for the Company), and the advice or opinion of such counsel shall be
full and complete authorization and protection to the Rights Agent, and the
Rights Agent shall incur no liability, for or in respect of any action taken or
omitted by it in good faith and in accordance with such advice or opinion.

                                      -33-
<PAGE>
 
          (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
(including, without limitation, the identity of any Acquiring Person and the
determination of "current market price") be proved or established by the Company
prior to taking or suffering or omitting to take 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 person believed by the Rights Agent to be any one of
the Chairman of the Board, President, Chief Executive Officer, a Vice President,
the Treasurer or the Secretary of the Company and delivered to the Rights Agent;
and such certificate shall be full authorization to the Rights Agent, and the
Rights Agent shall incur no liability, for or in respect of any action taken,
omitted 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 or in the Rights
Certificates (except as to 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 is serving as an administrative agent and shall
not be under any responsibility in respect of, the validity of any provision of
this Agreement or the execution and delivery of this Agreement (except the due
execution hereof by the Rights Agent) or in respect of the validity or execution
of any Rights Certificate (except its countersignature thereof); nor shall it be
responsible for any breach by the Company of any covenant or condition contained
in this Agreement or in any Rights Certificate; nor shall it be responsible for
any change in the exercisability of the Rights (including the Rights becoming
null and void pursuant to Section 7(e) hereof) or any adjustment required under
any of the provisions 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 exercise of Rights
evidenced by Rights Certificates after actual notice of any such 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 Common Stock or
shares of Series A Preferred Stock to be issued pursuant to this Agreement or
any Rights Certificate or as to whether any shares of Common Stock or shares of
Series A Preferred Stock will, when so issued, be validly authorized and issued,
fully paid and non-assessable.

          (f) The Company agrees that it will perform, execute, acknowledge and
deliver or cause to be performed, executed, acknowledged and delivered all such

                                      -34-
<PAGE>
 
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
person believed by the Rights Agent to be any one of the Chairman of the Board,
the President, Chief Executive Officer, a Vice President, the Secretary or the
Treasurer of the Company, and to apply to such officers for advice or
instructions in connection with its duties, and it shall not be liable for any
action taken, omitted to be taken or suffered to be taken by it in good faith in
accordance with instructions of any such officer.  Any application by the Rights
Agent for written instructions from the Company may, at the option of the Rights
Agent, set forth in writing any action proposed to be taken, suffered or omitted
by the Rights Agent under this Agreement and the date on or after which such
action shall be taken or suffered or such omission shall be effective.  The
Rights Agent shall not be liable for any action taken or suffered by, or
omission of, the Rights Agent in accordance with a proposal included in any such
application on or after the date specified in such application (which date shall
not be less than five Business Days after the date any officer of the Company
actually receives such application, unless any such officer shall have consented
in writing to an earlier date) unless, prior to taking any such action (or the
effective date in the case of an omission), the Rights Agent shall have received
written instruction in response to such application specifying the action to be
taken, suffered or omitted.

          (h) The Rights Agent and any stockholder, affiliate, 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 become pecuniarily interested in any
transaction in which the Company may be interested, or contract with or lend
money to the Company 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 or for any other Person
or 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 resulting from any such act, default,
neglect, or misconduct; provided, however, the Rights Agent was not grossly
                        --------  -------                                  
negligent in the selection and continued employment thereof.

          (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 

                                      -35-
<PAGE>
 
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.

          (k) If, with respect to any Rights Certificate surrendered to the
Rights Agent for exercise or transfer, the certificate attached to the form of
assignment or form of election to purchase, as the case may be, has either not
been properly completed or indicates an affirmative response to clause 1 and/or
2 thereof, the Rights Agent shall not take any further action with respect to
such requested exercise of transfer without first consulting with the Company.

          (l) The Rights Agent undertakes only the express duties and
obligations imposed on it by this Agreement and no implied duties or obligations
shall be read into this Agreement against the Rights Agent.

     SECTION 19.  COMPENSATION AND INDEMNIFICATION OF 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, its officers, employees, agents and
directors for, and to hold each of them harmless against, any loss, liability,
or expense, incurred without gross negligence, bad faith or willful misconduct
on the part of the Rights Agent, for any action taken, suffered or omitted by
the Rights Agent or such other indemnified party in connection with the
acceptance and administration of this Agreement and the exercise of its duties
hereunder, including but not limited to the costs and expenses of defending
against any claim of liability in the premises.  The indemnity provided for
hereunder shall survive the expiration of the Rights and the termination of this
Agreement.

          (b) The Rights Agent shall be authorized and 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 or the exercise of its
duties hereunder in reliance upon any Rights Certificate or certificate for
Common Stock or for other securities of the Company, 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.

          (c) Anything in this Agreement to the contrary notwithstanding, in no
event shall the Rights Agent be liable for special, indirect or consequential
loss or damage of any kind whatsoever (including but not limited to lost
profits), even if 

                                      -36-
<PAGE>
 
the Rights Agent has been advised of the likelihood of such loss or damage and
regardless of the form of the action unless such loss or damage results from the
gross negligence, bad faith or willful misconduct of the Rights Agent.

     SECTION 20.  MERGER OR CONSOLIDATION OR CHANGE OF NAME OF RIGHTS AGENT.

          (a) Any Person into which the Rights Agent or any successor Rights
Agent may be merged or with which it may be consolidated, or any Person
resulting from any merger or consolidation to which the Rights Agent or any
successor Rights Agent shall be a party, or any Person succeeding to the
shareholder services 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, however, that such Person would be eligible for
                --------  -------                                        
appointment as a successor Rights Agent under the provisions of Section 21
hereof.

          (b) In case at any time the name of the Rights Agent shall be changed
and at any such time any of the Rights Certificates shall have been
countersigned but not delivered, the Rights Agent may adopt the countersignature
under its prior name and deliver Rights Certificates so countersigned; and in
case at that time any of the Rights Certificates shall not have been
countersigned, the Rights Agent may countersign such Rights Certificates either
in its prior name or in its changed name; and in all such cases such Rights
Certificates shall have the full force provided in the Rights Certificates and
in this Agreement.

     SECTION 21.  CHANGE OF RIGHTS AGENT.

          (a) The Rights Agent or any successor Rights Agent may resign and be
discharged from its duties under this Agreement upon thirty (30) days' notice in
writing mailed to the Company and to each transfer agent of the Common Stock and
the Series A Preferred Stock by registered or certified mail, and to the holders
of the Rights Certificates by first-class mail.  The Company may remove the
Rights Agent or any successor Rights Agent upon thirty (30) 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 Stock and Series A Preferred Stock
by registered or certified mail, and to the holders of the Rights Certificates
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 to
the Rights Agent.  If the Company shall fail to make such appointment within a
period of thirty (30) 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 or by the holder of a Rights Certificate (who shall,
with such notice, submit his Rights Certificate for inspection by the Company),
then the registered holder of any Rights Certificate 

                                      -37-
<PAGE>
 
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 (i) a Person organized and doing business under the laws
of the United States or of the State of New York (or of any other state of the
United States so long as such Person is authorized to do business in the State
of New York), in good standing, having an office in the State of New York which
is authorized under such laws to exercise corporate trust power and is subject
to supervision or examination by federal or state authority and which has at the
time of its appointment as Rights Agent a combined capital and surplus of at
least $100 million or (ii) an Affiliate of such a Person described in clause
(a). 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 Stock
and the Series A Preferred Stock, and mail a notice thereof in writing to the
registered holders of the Rights Certificates. Failure to give any notice
provided for in this Section 21, 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.

          (b) In case at the time such successor Rights Agent shall succeed to
the agency created by this Agreement, any of the Rights Certificates shall have
been countersigned but not delivered, any such successor Rights Agent may adopt
the countersignature of the predecessor Rights Agent and deliver such Rights
Certificates so countersigned; and in case at that time any of the Rights
Certificates shall not have been countersigned, any successor Rights Agent may
countersign such Rights Certificates either in the name of the predecessor
Rights Agent or in the name of the successor Rights Agent; and in all such cases
such Rights Certificates shall have the full force provided in the Rights
Certificates and in this Agreement.

     SECTION 22.  ISSUANCE OF NEW RIGHTS CERTIFICATES.

          Notwithstanding any of the provisions of this Agreement or of the
Rights to the contrary, the Company may, at its option, issue new Rights
Certificates evidencing Rights in such form as may be approved by the Board to
reflect any adjustment or change in the Purchase Price per share and the number
or kind of class of shares or other securities or property purchasable under the
Rights Certificates made in accordance with the provisions of this Agreement.
In addition, in connection with the issuance or sale of shares of Common Stock
following the 

                                      -38-
<PAGE>
 
Distribution Date (other than upon exercise of a Right) and prior to the
redemption or expiration of the Rights, the Company (a) shall, with respect to
shares of Common Stock so issued or sold pursuant to the exercise of stock
options or under any employee plan or arrangement, or upon the exercise,
conversion or exchange of securities hereinafter issued by the Company, and (b)
may, in any other case, if deemed necessary or appropriate by the Board, issue
Rights Certificates representing the appropriate number of Rights in connection
with such issuance or sale; provided, however, that (i) no such Rights
                            --------  -------                         
Certificate shall be issued if, and to the extent that, the Company shall be
advised by counsel that such issuance would create a significant risk of
material adverse tax consequences to the Company or the Person to whom such
Rights Certificate would be issued, and (ii) no such Rights Certificate shall be
issued if, and to the extent that, appropriate adjustment shall otherwise have
been made in lieu of the issuance thereof.

     SECTION 23.  REDEMPTION.

          (a) The Board may, at its option, at any time during the period
commencing on the Rights Dividend Declaration Date and ending on the earlier of
(i) the Close of Business on the tenth day following the Stock Acquisition Date
(or, if the Stock Acquisition Date shall have occurred prior to the Record Date,
the Close of Business on the tenth day following the Record Date), as such
period may be extended or shortened in the discretion of the Board (the
"Redemption Period") or (ii) the Close of Business on the Final Expiration Date,
cause the Company to redeem all but not less than all the then outstanding
Rights at a redemption price of $.005 per Right, as such amount may be
appropriately adjusted to reflect any stock split, stock dividend or similar
transaction occurring after the date hereof (such redemption price being
hereinafter referred to as the "Redemption Price"); provided, however, that, if
                                                    --------  -------          
the Board authorizes redemption of the Rights or a change in the Redemption
Period on or after the time a Person becomes an Acquiring Person, then such
authorization shall require the concurrence of two-thirds of the Board.  If,
following the occurrence of a Stock Acquisition Date and following the
expiration of the Company's right of redemption hereunder (i) a Person who is an
Acquiring Person shall have transferred or otherwise disposed of a number of
shares of Common Stock in one transaction or series of transactions, not
directly or indirectly involving the Company or any of its Subsidiaries, which
did not result in the occurrence of a Triggering Event such that such Person is
thereafter a Beneficial Owner of 10% or less of the outstanding shares of Common
Stock, (ii) there are no other Persons, immediately following the occurrence of
the event described in clause (i), who are Acquiring Persons, and (iii) the
Board, by a vote of two-thirds of the Board, shall so approve, then the
Company's right of redemption shall be reinstated and thereafter be subject to
the provisions of this Section 23.  Notwithstanding anything contained in this
Agreement to the contrary, the Rights shall not be exercisable after the first
occurrence of a Section 11(a)(ii) Event or a Section 13 Event until such time as
the Company's right of redemption 

                                      -39-
<PAGE>
 
hereunder has expired. The Company may, at its option, pay the Redemption Price
in cash, shares of Common Stock (based on the current market price of the Common
Stock at the time of redemption) or any other form of consideration deemed
appropriate by the Board.

          (b) Immediately upon the action of the Board ordering the redemption
of the Rights, evidence of which shall have been filed with the Rights Agent,
and without any further action and without any notice, the right to exercise the
Rights will terminate and the only right thereafter of the holders of Rights
shall be to receive the Redemption Price.  Promptly after the action of the
Board ordering the redemption of the Rights, the Company shall give notice of
such redemption to the Rights Agent and the holders of the then outstanding
Rights by mailing such notice to all such holders at their last addresses as
they appear upon the registry books of the Rights Agent or, prior to the
Distribution Date, on the registry books of the Transfer Agent for the Common
Stock.  Any notice which is mailed in the manner herein provided shall be deemed
given, whether or not the holder receives the notice.  Each such notice of
redemption will state the method by which the payment of the Redemption Price
will be made.

     SECTION 24.  EXCHANGE.

          (a) The Board may, at its option, at any time after any Person becomes
an Acquiring Person, exchange all or part of the then outstanding and
exercisable Rights (which shall not include Rights that have become null and
void pursuant to the provisions of Section 11(a)(ii) or Section 7(e) hereof) for
shares of Common Stock at an exchange ratio of one share of Common Stock per
Right, appropriately adjusted to reflect any stock split, stock dividend or
similar transaction occurring after the date hereof (such exchange ratio being
hereinafter referred to as the "Exchange Ratio").

          (b) Immediately upon the action of the Board ordering the exchange of
any Rights pursuant to subsection (a) of this Section 24 and without any further
action and without any notice, the right to exercise such Rights shall terminate
and the only right thereafter of a holder of such Rights shall be to receive
that number of shares of Common Stock equal to the number of such Rights held by
such holder multiplied by the Exchange Ratio.  The Company shall promptly give
public notice of any such exchange; provided, however, that the failure to give,
                                    --------  -------                           
or any defect in, such notice shall not affect the validity of such exchange.
The Company promptly shall mail a notice of any such exchange to all of the
holders of such Rights at their last addresses as they appear upon the registry
books of the Rights Agent.  Any notice which is mailed in the manner herein
provided shall be deemed given, whether or not the holder receives the notice.
Each such notice of exchange will state the method by which the exchange of
Common Stock for Rights will be effected and, in the event of any partial
exchange, the number of Rights which will be 

                                      -40-
<PAGE>
 
exchanged. Any partial exchange shall be effected pro rata based on the number
of Rights (other than Rights which have become void pursuant to the provisions
of Section 11(a)(ii) or Section 7(e) hereof) held by each holder of Rights.

          (c) In the event that there shall not be sufficient Common Stock
issued but not outstanding or authorized but unissued to permit any exchange of
Rights as contemplated in accordance with this Section 24, the Company shall
take all such action as may be necessary to authorize additional shares of
Common Stock for issuance upon exchange of the Rights.

          (d) The Company shall not be required to issue fractions of shares of
Common Stock or to distribute certificates which evidence fractional shares of
Common Stock.  In lieu of such fractional shares, the Company shall pay to the
registered holders of the Right Certificates with regard to which such
fractional shares would otherwise be issuable an amount in cash equal to the
same fraction of the current market value of a whole share of Common Stock.  For
the purposes of this paragraph (d), the current market value of a whole share of
Common Stock shall be the closing price of a share of Common Stock (as
determined pursuant to the second sentence of Section 11(d) hereof) for the
Trading Day immediately prior to the date of exchange pursuant to this 
Section 24.

     SECTION 25.  NOTICE OF CERTAIN EVENTS.

          (a) In case the Company shall propose, at any time after the
Distribution Date (i) to pay any dividend payable in stock of any class to the
holders of Series A Preferred Stock or to make any other distribution to the
holders of Series A Preferred Stock (other than a regular quarterly cash
dividend out of earnings or retained earnings) or (ii) to offer to the holders
of Series A Preferred Stock rights or warrants to subscribe for or to purchase
any additional shares of Series A Preferred Stock or shares of stock of any
class or any other securities, rights or options, or (iii) to effect any
reclassification of its Series A Preferred Stock (other than a reclassification
involving only the subdivision of outstanding Series A Preferred Stock), or (iv)
to effect any consolidation or 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 more than 50% of the assets
or earning power of the Company and its subsidiaries (taken as a whole) to, any
other Person, 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
Rights Certificate, to the extent feasible and in accordance with Section 26
hereof, a notice of such proposed action, which shall specify the record date
for the purposes of such stock dividend, distribution of rights or warrants, or
the date on which such reclassification, consolidation, merger, sale, transfer,
liquidation, dissolution, or winding up is to take place and the date of
participation therein by the holders of the shares of Series A Preferred Stock,
if any such date is to be fixed, and such 

                                      -41-
<PAGE>
 
notice shall be so given in the case of any action covered by clause (i) or (ii)
above at least twenty (20) days prior to the record date for determining holders
of the shares of Series A Preferred Stock for purposes of such action and in the
case of any such other action, at least twenty (20) days prior to the date of
the taking of such proposed action or the date of participation therein by the
holders of the shares of Series A Preferred Stock whichever shall be the
earlier.

          (b) In case any Section 11(a)(ii) Event shall occur, then, in any such
case, (i) the Company shall as soon as practicable thereafter give to each
holder of a Rights Certificate, to the extent feasible and in accordance with
Section 26 hereof, a notice of the occurrence of such event which shall specify
the event and the consequences of the event to holders of Rights under Section
11(a)(ii) hereof, and (ii) all references in the preceding paragraph to Series A
Preferred Stock shall be deemed thereafter to refer to Common Stock and/or, if
appropriate other securities.

     SECTION 26.  NOTICES.

          Notices or demands authorized by this Agreement to be given or made by
the Rights Agent or by the holder of any Rights Certificate 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:

               HMC MERGER CORPORATION
               10400 Fernwood Road
               Bethesda, Maryland 20817

               Attention:  General Counsel

Subject to the provisions of Section 21 hereof, any notice or demand authorized
by this Agreement to be given or made by the Company or by the holder of any
Rights Certificate 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 BANK OF NEW YORK
               Stock Transfer Administration Group
               101 Barclay Street - 12 West
               New York, New York 10286

               Attention:  Ralph Chianese

Notices or demands authorized by this Agreement to be given or made by the
Company or the Rights Agent to the holder of any Rights Certificate shall be

                                      -42-
<PAGE>
 
sufficiently given or made if sent by first-class mail, postage prepaid,
addressed to any such holder at the address of such holder as shown on the
registry books of the Company.

     SECTION 27.  SUPPLEMENTS AND AMENDMENTS.

          Prior to the Distribution Date and subject to the penultimate sentence
of this Section 27, the Company may, and the Rights Agent shall, if the Company
so directs, supplement or amend any provision of this Agreement without the
approval of any holders of certificates representing shares of Common Stock.
From and after the Distribution Date and subject to the penultimate sentence of
this Section 27, the Company may, and the Rights Agent shall at any time and
from time to time, if the Company so directs, supplement or amend this Agreement
without the approval of any holders of Rights Certificates in order (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 change or supplement
the provisions hereunder in any manner which the Company may deem necessary or
desirable and which shall not adversely affect the interests of the holders of
Rights Certificates (other than an Acquiring Person or an Affiliate or Associate
of any such Person); provided, however, that this Agreement may not be
                     --------  -------                                
supplemented or amended (A) to lengthen a time period relating to when the
Rights may be redeemed at such time as the Rights are not then redeemable, or
(B) to lengthen any other time period unless such lengthening is for the purpose
of protecting, enhancing or clarifying the rights of, and/or the benefits to,
the holders of Rights (other than an Acquiring Person or an Affiliate or
Associate of any such Person).  Upon the delivery of a certificate from an
appropriate officer of the Company which states that the proposed supplement or
amendment is in compliance with the terms of this Section 27, the Rights Agent
shall execute such supplement or amendment.  Notwithstanding anything contained
in this Agreement to the contrary, no supplement or amendment shall be made
which changes the Redemption Price, the Final Expiration Date, the number of one
one-thousandths of a share of Series A Preferred Stock for which a Right is
exercisable or the Purchase Price; provided, however, that at any time prior to
                                   --------  -------                           
the Distribution Date, the Company may amend this Agreement to increase the
Purchase Price.  Prior to the Distribution Date, the interests of the holders of
Rights shall be deemed coincident with the interests of the holders of shares of
Common Stock.

     SECTION 28.  SUCCESSORS.

          All the covenants and provisions of this Agreement by or for the
benefit of the Company or the Rights Agent shall bind and inure to the benefit
of their respective successors and assigns hereunder.

                                      -43-
<PAGE>
 
     SECTION 29.  DETERMINATIONS AND ACTIONS BY THE BOARD, ETC.

          For all purposes of this Agreement, any calculation of the number of
shares of Common Stock outstanding at any particular time, including for
purposes of determining the particular percentage of such outstanding shares of
Common Stock of which any Person is the Beneficial Owner, shall be made in
accordance with the last sentence of Rule 13d-3(d)(1)(i) of the General Rules
and Regulations under the Exchange Act.  The Board (with, where specifically
provided for herein, the concurrence of two-thirds of the Directors) shall have
the exclusive power and authority to administer this Agreement and to exercise
all rights and powers specifically granted to the Board (with, where
specifically provided for herein, the concurrence of two-thirds of the
Directors) or to 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 a determination to redeem or not redeem
the Rights or to amend the 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
(with, where specifically provided for herein, the concurrence of two-thirds of
the Directors) in good faith, shall (x) be final, conclusive and binding on the
Company, the Rights Agent, the holders of the Rights and all other Persons, and
(y) not subject any director to any liability to the holders of the Rights.

     SECTION 30.  BENEFITS OF THIS AGREEMENT.

          Nothing in this Agreement shall be construed to give to any Person
other than the Company, the Rights Agent and the registered holders of the
Rights Certificates (and, prior to the Distribution Date, the registered holders
of the Common Stock) 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 Rights Agent and the registered holders of the Rights Certificates
(and, prior to the Distribution Date, registered holders of Common Stock).

     SECTION 31.  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; provided, however, that
                                                --------  -------      
notwithstanding anything in this Agreement to the contrary, if any such term,
provision, covenant or restriction is held by such court or authority to be
invalid, void or unenforceable and the Board determines in its good faith
judgment that severing the invalid language from this 

                                      -44-
<PAGE>
 
Agreement would materially and adversely affect the purpose or effect of this
Agreement, the right of redemption set forth in Section 23 hereof shall be
reinstated and shall not expire until the Close of Business on the tenth day
following the date of such determination by the Board.

     SECTION 32.  GOVERNING LAW.

          This Agreement, each Right and each Rights Certificate issued
hereunder shall be deemed to be a contract made under the laws of the State of
Maryland and for all purposes shall be governed by and construed in accordance
with laws of such State.

     SECTION 33.  COUNTERPARTS.

          This Agreement may be executed in any number of counterparts.  It
shall not be necessary that the signature of or on behalf of each party appears
on each counterpart, but it shall be sufficient that the signature of or on
behalf of each party appears on one or more of the counterparts.  All
counterparts shall collectively constitute a single agreement.  It shall not be
necessary in any proof of this Agreement to produce or account for more than a
number of counterparts containing the respective signatures of or on behalf of
all of the parties.

     SECTION 34.  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.

     SECTION 35.  LIMITATION OF OWNERSHIP.

          Notwithstanding anything to the contrary in this Agreement, a Person's
ability to acquire shares of Series A Preferred Stock and/or Common Stock of the
Company under this Agreement shall be limited to only such number of shares of
Series A Preferred Stock and/or Common Stock, as the case may be, as would not
cause any such Person or any other Person (taking into account the attribution
rules of the Internal Revenue Code) to exceed the ownership limits set forth in
the Articles of Incorporation of the Company.

                                      -45-
<PAGE>
 
          IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be duly executed and attested, all as of the day and year first above written.


ATTEST:                                HMC MERGER CORPORATION


By: /s/ Susan E. Wallace            By: /s/ Christopher G. Townsend
    -------------------------           --------------------------------
   Name:  Susan E. Wallace          Name:  Christopher G. Townsend
   Title: Assistant Secretary       Title: Senior Vice President, General 
                                           Counsel and Corporate Secretary

                             
                                                                        
                                                                        
                                                                        
ATTEST:                             THE BANK OF NEW YORK                
                                                                        
                                                                        
By: /s/ Curtis Parker               By: /s/ Ralph Chianese
    -------------------------           --------------------------------
   Name:  Curtis Parker                 Name: Ralph Chianese
   Title: Assistant Treasurer           Title: Vice President

                                      -46-
<PAGE>
 
                                                                       EXHIBIT A


                             HMC MERGER CORPORATION

         ______________________________________________________________
                ARTICLES SUPPLEMENTARY OF HMC MERGER CORPORATION
           CLASSIFYING AND DESIGNATING A SERIES OF PREFERRED STOCK AS
               SERIES A JUNIOR PARTICIPATING PREFERRED STOCK AND
                 FIXING DISTRIBUTION AND OTHER PREFERENCES AND
                             RIGHTS OF SUCH SERIES
         ______________________________________________________________
                                        

          HMC Merger Corporation, a Maryland corporation (the "Corporation"),
hereby certifies to the State Department of Assessments and Taxation of Maryland
pursuant to Section 2-105(9) of the Annotated Code of Maryland that:

          FIRST:  Pursuant to authority granted by the Articles of Incorporation
of the Corporation, the Board of Directors on November 23, 1998 adopted a
resolution designating and classifying 650,000 unissued shares of Preferred
Stock as Series A Junior Participating Preferred Stock.

          SECOND:  The following is a description of the Series A Junior
Participating Preferred Stock, including the preferences, conversion and other
rights, voting powers, restrictions, limitations as to dividends,
qualifications, and terms and conditions of redemption thereof:

          Section 1.  Designation and Amount.  The shares of such series of
                      ----------------------                               
Preferred Stock, par value $.01 per share, shall be designated as "Series A
Junior Participating Preferred Stock" and the number of shares constituting such
series shall be 650,000.  Such number of shares may be increased or decreased by
resolution of the Board of Directors and by the filing of articles supplementary
in accordance with the Maryland General Corporation Law; provided, that no
decrease shall reduce the number of shares of Series A Junior Participating
Preferred Stock to a number less than the number of shares then outstanding plus
the number of shares reserved for issuance upon the exercise of outstanding
options, rights or warrants or upon the conversion of any outstanding securities
issued by the Corporation convertible into Series A Junior Participating
Preferred Stock.
<PAGE>
 
          Section 2.  Dividends and Distributions.
                      --------------------------- 

          (A) Subject to the prior and superior rights of the holders of any
shares of any series of Preferred Stock (or any similar stock) ranking prior and
superior to the shares of Series A Junior Participating Preferred Stock with
respect to dividends, the holders of shares of Series A Junior Participating
Preferred Stock shall be entitled to receive, when, as and if declared by the
Board of Directors out of funds legally available for the purpose, quarterly
dividends payable in cash on the 15th day of April, July, October and January,
in each year (each such date being referred to herein as a "Quarterly Dividend
Payment Date"), commencing on the first Quarterly Dividend Payment Date after
first issuance of a share or fraction of a share of Series A Junior
Participating Preferred Stock, in an amount per share (rounded to the nearest
cent) equal to the greater of (a) $10.00 or (b) subject to the provision for
adjustment hereinafter set forth, one thousand (1,000) times the aggregate per
share amount of all cash dividends, and one thousand (1,000) times the aggregate
per share amount (payable in kind) of all non-cash dividends or other
distributions (other than a dividend payable in shares of common stock, par
value $.01 per share, of the Corporation (the "Common Stock"), or a subdivision
of the outstanding shares of Common Stock (by reclassification or otherwise))
declared on the Common Stock, since the immediately preceding Quarterly Dividend
Payment Date, or, with respect to the first Quarterly Dividend Payment Date,
since the first issuance of any share or fraction of a share of Series A Junior
Participating Preferred Stock.  In the event the Corporation shall at any time
after November 23, 1998 (the "Rights Declaration Date") (i) declare or pay any
dividend on Common Stock payable in shares of Common Stock, (ii) subdivide the
outstanding Common Stock, or (iii) combine the outstanding Common Stock into a
smaller number of shares, then in each such case the amount to which holders of
shares of Series A Junior Participating Preferred Stock were entitled
immediately prior to such event under clause (b) of the preceding sentence shall
be adjusted by multiplying such amount by a fraction, the numerator of which is
the number of shares of Common Stock outstanding immediately after such event
and the denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event.

          (B) The Corporation shall declare a dividend or distribution on the
Series A Junior Participating Preferred Stock as provided in paragraph (A) above
immediately after it declares a dividend or distribution on the Common Stock
(other than a dividend payable in shares of Common Stock); provided that, in the
event no dividend or distribution shall have been declared on the Common Stock
during the period between any Quarterly Dividend Payment Date and the next
subsequent Quarterly Dividend Payment Date, a dividend of $10.00 per share on
the Series A Junior Participating Preferred 


                                     - 2 -
<PAGE>
 
Stock shall nevertheless be payable on such subsequent Quarterly Dividend
Payment Date.

          (C) Dividends shall begin to accrue and be cumulative on outstanding
shares of Series A Junior Participating Preferred Stock from the Quarterly
Dividend Payment Date next preceding the date of issue of such shares of Series
A Junior Participating Preferred Stock, unless the date of issue of such shares
is prior to the record date set for the first Quarterly Dividend Payment Date,
in which case dividends on such shares shall begin to accrue from the date of
issue of such shares, or unless the date of issue is a Quarterly Dividend
Payment Date or is a date after the record date for the determination of holders
of shares of Series A Junior Participating Preferred Stock entitled to receive a
quarterly dividend and before such Quarterly Dividend Payment Date, in either of
which events such dividends shall begin to accrue and be cumulative from such
Quarterly Dividend Payment Date.  Accrued but unpaid dividends shall not bear
interest.  Dividends paid on the shares of Series A Junior Participating
Preferred Stock in an amount less than the total amount of such dividends at the
time accrued and payable on such shares shall be allocated pro rata on a share-
by-share basis among all such shares at the time outstanding.  The Board of
Directors may fix a record date for the determination of holders of shares of
Series A Junior Participating Preferred Stock entitled to receive payment of a
dividend or distribution declared thereon, which record date shall be no more
than 60 days prior to the date fixed for the payment thereof.

          Section 3.  Voting Rights.  The holders of shares of Series A Junior
                      -------------                                           
Participating Preferred Stock shall have the following voting rights:

          (A) Subject to the provision for adjustment hereinafter set forth,
each share of Series A Junior Participating Preferred Stock shall entitle the
holder thereof to one thousand (1,000) votes on all matters submitted to a vote
of the stockholders of the Corporation.  In the event the Corporation shall at
any time after the Rights Declaration Date (i) declare any dividend on Common
Stock payable in shares of Common Stock, (ii) subdivide the outstanding Common
Stock, or (iii) combine the outstanding Common Stock into a smaller number of
shares, then in each such case the number of votes per share to which holders of
shares of Series A Junior Participating Preferred Stock were entitled
immediately prior to such event shall be adjusted by multiplying such number by
a fraction the numerator of which is the number of shares of Common Stock
outstanding immediately after such event and the denominator of which is the
number of shares of Common Stock that were outstanding immediately prior to such
event.

          (B) Except as otherwise provided by law, the holders of shares of
Series A Junior Participating Preferred Stock and the holders of shares of


                                     - 3 -
<PAGE>
 
Common Stock and any other stock of the Corporation having general voting rights
shall vote together as one class on all matters submitted to a vote of
stockholders of the Corporation.

          (C) Except as set forth herein, holders of Series A Junior
Participating Preferred Stock shall have no special voting rights and their
consent shall not be required (except to the extent they are entitled to vote
with holders of Common Stock as set forth herein) for taking any corporate
action.

          Section 4.  Certain Restrictions.
                      -------------------- 

          (A) Whenever dividends or distributions payable on the Series A Junior
Participating Preferred Stock as provided in Section 2 are not paid, thereafter
and until such dividends and distributions, whether or not declared, on shares
of Series A Junior Participating Preferred Stock outstanding shall have been
paid in full, the Corporation shall not:

          (i) declare or pay dividends on, or make any other distributions on,
or redeem or purchase or otherwise acquire for consideration any shares of stock
ranking junior (either as to dividends or upon liquidation, dissolution or
winding up) to the Series A Junior Participating Preferred Stock; or

          (ii) declare or pay dividends on, or make any other distributions on,
any shares of stock ranking on a parity (either as to dividends or upon
liquidation, dissolution or winding up) with the Series A Junior Participating
Preferred Stock, except dividends paid ratably on the Series A Junior
Participating Preferred Stock and all such parity stock on which dividends are
payable in proportion to the total amounts to which the holders of all such
shares are then entitled; or

          (iii)     redeem or purchase or otherwise acquire for consideration
shares of any stock ranking on a parity (either as to dividends or upon
liquidation, dissolution or winding up) with the Series A Junior Participating
Preferred Stock, provided that the Corporation may at any time redeem, purchase
or otherwise acquire shares of any such parity stock in exchange for shares of
any stock of the Corporation ranking junior (either as to dividends or upon
dissolution, liquidation or winding up) to the Series A Junior Participating
Preferred Stock; or

          (iv) redeem or purchase or otherwise acquire for consideration any
shares of Series A Junior Participating Preferred Stock, or any shares of stock
ranking on a parity with the Series A Junior Participating Preferred Stock,
except in accordance with a purchase offer made in writing or 


                                     - 4 -
<PAGE>
 
by publication (as determined by the Board of Directors) to all holders of such
shares upon such terms as the Board of Directors, after consideration of the
respective annual dividend rates and other relative rights and preferences of
the respective Series A and classes, shall determine in good faith will result
in fair and equitable treatment among the respective series or classes.

          (B) The Corporation shall not permit any subsidiary of the Corporation
to purchase or otherwise acquire for consideration any shares of stock of the
Corporation unless the Corporation could, under paragraph (A) of this Section 4,
purchase or otherwise acquire such shares at such time and in such manner.

          Section 5.   Reacquired Shares.  Any shares of Series A Junior
                       -----------------                                
Participating Preferred Stock purchased or otherwise acquired by the Corporation
in any manner whatsoever shall be retired and canceled promptly after the
acquisition thereof.  All such shares shall upon their cancellation become
authorized but unissued shares of Preferred Stock and may be reissued as part of
a new series of Preferred Stock to be created by resolution or resolutions of
the Board of Directors, subject to the conditions and restrictions on issuance
set forth herein, or reclassified as Common Stock or other stock of the
Corporation as provided in the Corporation's Articles of Incorporation.

          Section 6.  Liquidation, Dissolution or Winding Up.
                      -------------------------------------- 

          (A) Upon any liquidation (voluntary or otherwise), dissolution or
winding up of the Corporation, no distribution shall be made to the holders of
shares of stock ranking junior (either as to dividends or upon liquidation,
dissolution or winding up) to the Series A Junior Participating Preferred Stock
unless, prior thereto, the holders of shares of Series A Junior Participating
Preferred Stock shall have received $55,000 per share, plus any unpaid dividends
and distributions payable thereon, whether or not declared, to the date of such
payment (the "Series A Liquidation Preference").  Following the payment of the
full amount of the Series A Liquidation Preference, no additional distributions
shall be made to the holders of Series A Junior Participating Preferred Stock
unless, prior thereto, the holders of shares of Common Stock shall have received
an amount per share (the "Common Adjustment") equal to the quotient obtained by
dividing (i) the Series A Liquidation Preference by (ii) 1,000 (as appropriately
adjusted as set forth in subparagraph (C) below to reflect such events as stock
splits, stock dividends and recapitalizations with respect to the Common Stock)
(such number in clause (ii) immediately above as so adjusted being referred to
as the "Adjustment Number").  Following the payment of the full amount of the
Series A Liquidation Preference and the Common Adjustment in respect of all
outstanding shares of Series A Junior Participating Preferred Stock and 


                                     - 5 -
<PAGE>
 
Common Stock, respectively, holders of Series A Junior Participating Preferred
Stock and holders of shares of Common Stock shall receive their ratable and
proportionate share of the remaining assets to be distributed in the ratio of
the Adjustment Number to one (1) with respect to such Series A Junior
Participating Preferred Stock and Common Stock, on a per share basis,
respectively.

          (B) In the event, however, that there are not sufficient assets
available to permit payment in full of the Series A Liquidation Preference and
the liquidation preferences of all other series of preferred stock, if any,
which rank on a parity with the Series A Junior Participating Preferred Stock,
then such remaining assets shall be distributed ratably to the holders of such
parity shares in proportion to their respective liquidation preferences.  In the
event, however, that there are sufficient assets available to permit payment in
full of the Common Adjustment, then such remaining assets shall be distributed
ratably to the holders of Common Stock.

          (C) In the event the Corporation shall at any time after the Rights
Declaration Date (i) declare any dividend on Common Stock payable in shares of
Common Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine the
outstanding Common Stock into a smaller number of shares, then in each such case
the Adjustment Number in effect immediately prior to such event shall be
adjusted by multiplying such Adjustment Number by a fraction the numerator of
which is the number of shares of Common Stock outstanding immediately after such
event and the denominator of which is the number of shares of Common Stock that
were outstanding immediately prior to such event.

          Section 7.  Consolidation, Merger, etc.  In case the Corporation shall
                      ---------------------------                               
enter into any consolidation, merger, combination or other transaction in which
the shares of Common Stock are exchanged for or changed into other stock or
securities, cash and/or any other property, then in any such case the shares of
Series A Junior Participating Preferred Stock shall at the same time be
similarly exchanged or changed into such stock or securities, cash and/or any
other property in an amount per share (subject to the provision for adjustment
hereinafter set forth) equal to one thousand (1,000) times the aggregate amount
of stock, securities, cash and/or any other property (payable in kind), as the
case may be, into which or for which each share of Common Stock is changed or
exchanged.  In the event the Corporation shall at any time after the Rights
Declaration Date (i) declare any dividend on Common Stock payable in shares of
Common Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine the
outstanding Common Stock into a smaller number of shares, then in each such case
the amount set forth in the preceding sentence with respect to the exchange or
change of shares of Series A Junior Participating Preferred Stock 


                                     - 6 -
<PAGE>
 
(as previously adjusted, if any prior adjustment has occurred) shall be adjusted
by multiplying such amount by a fraction the numerator of which is the number of
shares of Common Stock outstanding immediately after such event and the
denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event.

          Section 8.  Redemption.  The outstanding shares of Series A Junior
                      ----------                                            
Participating Preferred Stock may be redeemed as a whole, but not in part, at
any time, or from time to time, at the option of the Board, at a cash price per
share equal to 105 percent of (i) the product of the Adjustment Number times the
Average Market Value (as such term is hereinafter defined) of the Common Stock,
plus (ii) all dividends which on the redemption date are payable on the shares
to be redeemed and have not been paid, or declared and a sum sufficient for the
payment thereof set apart, without interest.  The "Average Market Value" is the
average of the closing sale prices of the Common Stock during the 30 day period
immediately preceding the date before the redemption date on the Composite Tape
for New York Stock Exchange Listed Stocks, or, if such stock is not quoted on
the Composite Tape, on the New York Stock Exchange, or, if such stock is not
listed on such Exchange, on the principal United States securities exchange
registered under the Securities Exchange Act of 1934, as amended, on which such
stock is listed, or, if such stock is not listed on any such exchange, the
average of the closing sale prices with respect to a share of Common Stock
during such 30 day period, as quoted on the National Association of Securities
Dealers, Inc. Automated Quotations System or any system then in use, or if no
such quotations are available, the fair market value of the Common Stock as
determined by the Board in good faith.

          Section 9.  Ranking.  Notwithstanding anything contained herein to the
                      -------                                                   
contrary, the Series A Junior Participating Preferred Stock shall rank junior to
all other series of the Corporation's Preferred Stock as to voting rights, the
payment of dividends and the distribution of assets in liquidation, unless the
terms of any such series shall provide otherwise.

          Section 10.  Amendment. The Articles of Incorporation of the
                       ---------                                      
Corporation shall not be further amended, nor shall an Articles Supplementary be
filed or amended, in any manner which would materially alter or change the
powers, preferences or special rights of the Series A Junior Participating
Preferred Stock so as to affect them adversely without the affirmative vote of
the holders of at least a majority of the outstanding shares of Series A Junior
Participating Preferred Stock, voting separately as a class.

          Section 11.  Fractional Shares.  Series A Junior Participating
                       -----------------                                
Preferred Stock may be issued in fractions of a share which shall entitle the


                                     - 7 -
<PAGE>
 
holders, in proportion to such holders' fractional shares, to exercise voting
rights, receive dividends, participate in distributions and have the benefit of
all other rights of holders of Series A Junior Participating Preferred Stock.

          IN WITNESS WHEREOF, HMC Merger Corporation has caused these Articles
Supplementary to be signed in its name and on its behalf by its President and
attested by its Secretary on December 29, 1998.


                                 HMC MERGER CORPORATION


                                 By:___________________________________
                                    Terence C. Golden
                                    President



Attest:
       ----------------------- 
       Christopher G. Townsend
       Secretary


          I, Terence C. Golden, President of HMC Merger Corporation hereby
acknowledge the foregoing Articles Supplementary of HMC Merger Corporation to be
the corporate act of HMC Merger Corporation, and to the best of my knowledge,
information and belief, these matters and facts are true in all material
respects, and my statement is made under penalties of perjury.



                                  ___________________________________
                                  Terence C. Golden
                                  President



                                     - 8 -
<PAGE>
 
                                                                       EXHIBIT B
                                                                                

                         SUMMARY OF RIGHTS TO PURCHASE
                 SERIES A JUNIOR PARTICIPATING PREFERRED STOCK


          On November 23, 1998, the Board of Directors of HMC MERGER CORPORATION
(the "Company") declared a dividend distribution of one right ("Right") for each
outstanding share of common stock (the "Common Stock") of the Company.  The
distribution is payable to stockholders of record on December 7, 1998.  Each
Right, when exercisable, entitles the registered holder to purchase from the
Company one one-thousandth of a share of Series A Junior Participating Preferred
Stock ("Preferred Stock") at a price of $55.00 per one one-thousandth share (the
"Purchase Price"), subject to adjustment.  The description and terms of the
Rights are set forth in a Rights Agreement (the "Rights Agreement") between the
Company and The Bank of New York, as Rights Agent (the "Rights Agent").

          Initially, the Rights will be attached to all certificates
representing shares of Common Stock then outstanding, and no separate
certificates evidencing the Rights will be distributed.  The Rights will
separate from the Common Stock and a distribution of Rights Certificates (as
defined below) will occur upon the earlier to occur of (i) 10 days following a
public announcement that a person or group of affiliated or associated persons
(an "Acquiring Person") has acquired, or obtained the right to acquire,
beneficial ownership of 20% or more of the outstanding shares of Common Stock
(the "Stock Acquisition Date") or (ii) 10 business days (or such later date as
the Board of Directors may determine) following the commencement of a tender
offer or exchange offer the consummation of which would result in the beneficial
ownership by a person of 20% or more of the outstanding shares of Common Stock
(the earlier of such dates being called the "Distribution Date").  For purposes
of the Rights Agreement, a person shall not be deemed to beneficially own
"Exempt Shares" which include (i) shares of Common Stock that are received
pursuant to the Agreement and Plan of Merger dated November 23, 1998, by and
among the Company, Host Marriott Corporation and Host Marriott, L.P. (the
"Merger Agreement"), in exchange for shares of common stock, par value $1.00 per
share of Host Marriott Corporation which such person beneficially owned on
February 3, 1989, and owned continuously thereafter until the Merger (as defined
in the Merger Agreement); (ii) certain shares of Common Stock which were
acquired by a person pursuant to a gift, bequest, inheritance or distribution
from a trust or from a corporation controlled by such person where such shares
of Common Stock were Exempt Shares immediately prior to such acquisition; and
(iii) shares of Common Stock acquired by a person as a result of the exercise of
the purchase right granted to Marriott International, Inc. pursuant to the
Distribution Agreement dated as of September 15, 1993, as amended, between the
Company and Marriott International, Inc.
<PAGE>
 
          Until the Distribution Date, (i) the Rights will be evidenced by the
Common Stock certificates, and will be transferred with and only with the Common
Stock certificates, (ii) new Common Stock certificates issued after December 7,
1998 upon transfer or new issuance of the Common Stock will contain a notation
incorporating the Rights Agreement by reference, and (iii) the surrender for
transfer of any certificates for Common Stock outstanding will also constitute
the transfer of the Rights associated with the Common Stock represented by such
certificate.

          The Rights are not exercisable until the Distribution Date and will
expire at the close of business on November 22, 2008, unless earlier redeemed or
exchanged by the Company as described below.  The Rights will not be exercisable
by a holder in any jurisdiction where the requisite qualification to the
issuance to such holder, or the exercise by such holder, of the Rights has not
been obtained or is not obtainable.

          As soon as practicable following the Distribution Date, separate
certificates evidencing the Rights ("Rights Certificates") will be mailed to
holders of record of the Common Stock as of the close of business on the
Distribution Date and, thereafter, the separate Rights Certificates alone will
evidence the Rights.  Except as otherwise determined by the Board of Directors,
only shares of Common Stock issued prior to the Distribution Date will be issued
with Rights.

          In the event that a Person becomes the beneficial owner of 20% or more
of the then outstanding shares of Common Stock (except pursuant to an offer for
all outstanding shares of Common Stock which the Board of Directors determine to
be fair to and otherwise in the best interests of the Company and its
stockholders), each holder of a Right will, after the end of a redemption period
referred to below, have the right (subject to the ownership limit and the other
ownership restrictions contained in the Company's Articles of Incorporation) to
exercise the Right by purchasing, for an amount equal to the Purchase Price,
Common Stock (or, in certain circumstances, cash, property or other securities
of the Company) having a value equal to two times such amount.  Notwithstanding
any of the foregoing, following the occurrence of the events set forth in this
paragraph, all Rights that are, or (under certain circumstances specified in the
Rights Agreement) were, beneficially owned by any Acquiring Person will be null
and void.  However, Rights are not exercisable following the occurrence of the
events set forth above until such time as the Rights are no longer redeemable by
the Company as set forth below.

          In the event that, at any time following the Stock Acquisition Date,
(i) the Company is acquired in a merger or other business combination
transaction in which the Company is not the surviving corporation (other than a
merger which follows an offer described in the second preceding paragraph), or
(ii) 50% or more of 

                                     - 2 -
<PAGE>
 
the Company's assets or earning power is sold or transferred, each holder of a
Right (except Rights which previously have been voided as set forth above)
shall, after the expiration of the redemption period referred to below, have the
right to receive, upon exercise, common stock of the acquiring company having a
value equal to two times the Purchase Price of the Right.

          At any time after a person or group of affiliated or associated
persons becomes an Acquiring Person, the Board of Directors of the Company may
exchange the Rights (other than Rights owned by such person or group which have
become void), in whole or in part, at an exchange ratio of one share of Common
Stock per Right (subject to adjustment).

          The Purchase Price payable, and the number of one one-thousandths of a
share of Preferred Stock or other securities or property issuable, upon exercise
of the Rights are subject to adjustment from time to time to prevent dilution
(i) in the event of a stock dividend on, or a subdivision, combination or
reclassification of the Preferred Stock, (ii) upon the grant to holders of the
Preferred Stock of certain rights or warrants to subscribe for Preferred Stock
or convertible securities at less than the current market price of the Preferred
Stock or (iii) upon the distribution to holders of the Preferred Stock of
evidences of indebtedness or assets (excluding regular quarterly cash dividends)
or of subscription rights or warrants (other than those referred to above).

          With certain exceptions, no adjustment in the Purchase Price will be
required until cumulative adjustments require an adjustment of at least 1% in
such Purchase Price.  No fractional shares will be issued (other than fractions
which are integral multiples of one one-thousandth of a share of Preferred
Stock) and in lieu thereof, an adjustment in cash will be made based on the
market price of the Preferred Stock on the last trading date prior to the date
of exercise.

          In general, the Board of Directors of the Company, may cause the
Company to redeem the Rights in whole, but not in part, at any time during the
period commencing on November 23, 1998, and ending on the tenth day following
the Stock Acquisition Date, as such period may be extended or shortened by the
Board of Directors (the "Redemption Period") at a price of $.005 per Right
(payable in cash, Common Stock or other consideration deemed appropriate by the
Board of Directors).  Under certain circumstances set forth in the Rights
Agreement, the decision to redeem the Rights will require the concurrence of
two-thirds of the Board of Directors.  After the Redemption Period has expired,
the Company's right of redemption may be reinstated if an Acquiring Person
reduces his beneficial ownership to 10% or less of the outstanding shares of
Common Stock in a transaction or series of transactions not involving the
Company and there are no other Acquiring Persons.  Immediately upon the action
of the Board of Directors of the Company ordering redemption of the Rights, the
Rights will terminate and the only right of the holders of Rights will be to
receive the $.005 redemption price.

                                     - 3 -
<PAGE>
 
          Until a Right is exercised, the holder thereof, as such, will have no
rights as a stockholder of the Company, including, without limitation, the right
to vote or to receive dividends.  While the distribution of the Rights will not
be subject to federal taxation to stockholders or to the Company, stockholders
may, depending upon the circumstances, recognize taxable income in the event
that the Rights become exercisable for Common Stock (or other consideration) of
the Company or for common stock of the acquiring company as set forth above.

                                  *    *    *


                                     - 4 -
<PAGE>
 
                                                                       EXHIBIT C
                                                                                

                          [Form of Rights Certificate]


            Certificate No. R-__________          __________ Rights

     NOT EXERCISABLE AFTER ____________ __, 2008 OR EARLIER IF REDEEMED OR
     EXCHANGED BY THE COMPANY.  THE RIGHTS ARE SUBJECT TO REDEMPTION, AT THE
     OPTION OF THE COMPANY, AT $.005 PER RIGHT ON THE TERMS SET FORTH IN THE
     RIGHTS AGREEMENT.  UNDER CERTAIN CIRCUMSTANCES, RIGHTS BENEFICIALLY OWNED
     BY AN ACQUIRING PERSON OR AN AFFILIATE OR ASSOCIATE OF ANY SUCH PERSON (AS
     SUCH TERMS ARE DEFINED IN THE RIGHTS AGREEMENT) AND ANY SUBSEQUENT HOLDER
     OF SUCH RIGHTS MAY BECOME NULL AND VOID.  THE RIGHTS SHALL NOT BE
     EXERCISABLE, AND SHALL BE VOID SO LONG AS HELD, BY A HOLDER IN ANY
     JURISDICTION WHERE THE REQUISITE QUALIFICATION TO THE ISSUANCE TO SUCH
     HOLDER, OR THE EXERCISE BY SUCH HOLDER, OF THE RIGHTS IN SUCH JURISDICTION
     SHALL NOT HAVE BEEN OBTAINED OR BE OBTAINABLE.  [THE RIGHTS REPRESENTED BY
     THIS RIGHTS CERTIFICATE ARE OR WERE BENEFICIALLY OWNED BY A PERSON WHO WAS
     OR BECAME AN ACQUIRING PERSON OR AN AFFILIATE OR ASSOCIATE OF AN ACQUIRING
     PERSON (AS SUCH TERMS ARE DEFINED IN THE RIGHTS AGREEMENT).  ACCORDINGLY,
     THIS RIGHTS CERTIFICATE AND THE RIGHTS REPRESENTED HEREBY MAY BECOME NULL
     AND VOID IN THE CIRCUMSTANCES SPECIFIED IN SECTION 7(e) OF SUCH 
     AGREEMENT.]  */
                  - 

     THE SHARES OF CAPITAL STOCK REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO
     RESTRICTIONS ON BENEFICIAL OWNERSHIP AND CONSTRUCTIVE OWNERSHIP AND
     TRANSFER PRIMARILY FOR THE PURPOSE OF THE CORPORATION'S MAINTENANCE OF ITS
     STATUS AS A REAL ESTATE INVESTMENT TRUST (A "REIT") UNDER THE INTERNAL
     REVENUE CODE OF 1986, AS AMENDED (THE "CODE").  SUBJECT TO CERTAIN FURTHER
     RESTRICTIONS AND EXCEPT AS EXPRESSLY PROVIDED IN THE CORPORATION'S CHARTER,
     (I) NO PERSON MAY BENEFICIALLY OWN OR CONSTRUCTIVELY OWN SHARES OF COMMON
     STOCK OF THE CORPORATION IN EXCESS OF 9.8 PERCENT (IN VALUE OR NUMBER OF
     SHARES) OF THE OUTSTANDING COMMON SHARES OF THE CORPORATION UNLESS SUCH
     PERSON IS AN EXCEPTED HOLDER (IN WHICH CASE THE EXCEPTED HOLDER LIMIT SHALL
     BE APPLICABLE) OR AN EXCLUDED HOLDER (IN WHICH CASE THE EXCLUDED HOLDER
     LIMIT SHALL BE APPLICABLE); (II) WITH RESPECT TO ANY CLASS OR SERIES OF
     SHARES OF CAPITAL STOCK OTHER THAN COMMON STOCK, NO PERSON MAY BENEFICIALLY

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

*/  The portion of the legend in brackets shall be inserted only if applicable
- -                                                                             
and shall replace the preceding sentence.
<PAGE>
 
     OWN OR CONSTRUCTIVELY OWN MORE THAN 9.8 PERCENT (IN VALUE OR NUMBER OF
     SHARES) OF THE OUTSTANDING SHARES OF SUCH CLASS OR SERIES OF SUCH STOCK OF
     THE CORPORATION, UNLESS SUCH PERSON IS AN EXCEPTED HOLDER (IN WHICH CASE
     THE EXCEPTED HOLDER LIMIT SHALL BE APPLICABLE) OR AN EXCLUDED HOLDER (IN
     WHICH CASE THE EXCLUDED HOLDER LIMIT SHALL BE APPLICABLE); (III) NO PERSON
     MAY BENEFICIALLY OWN OR CONSTRUCTIVELY OWN SHARES OF CAPITAL STOCK THAT
     WOULD RESULT IN THE CORPORATION BEING "CLOSELY HELD" UNDER SECTION 856(H)
     OF THE CODE, WOULD CAUSE EITHER THE CORPORATION TO BE CONSIDERED TO
     CONSTRUCTIVELY OWN AN INTEREST IN A TENANT THAT IS DESCRIBED IN SECTION
     856(D)(2)(B) OF THE CODE PURPOSES OF APPLYING SECTION 856(C) OF THE CODE OR
     HOST MARRIOTT, L.P. TO BE CONSIDERED TO CONSTRUCTIVELY OWN AN INTEREST IN A
     TENANT THAT IS DESCRIBED IN SECTION 856(D)(2)(B) OF THE CODE FOR PURPOSES
     OF APPLYING SECTION 7704(D) OF THE CODE, OR OTHERWISE WOULD CAUSE THE
     CORPORATION TO FAIL TO QUALIFY AS A REIT; AND (IV) NO PERSON MAY TRANSFER
     SHARES OF CAPITAL STOCK IF SUCH TRANSFER WOULD RESULT IN SHARES OF CAPITAL
     STOCK OF THE CORPORATION BEING OWNED BY FEWER THAN 100 PERSONS.  ANY PERSON
     WHO BENEFICIALLY OWNS OR CONSTRUCTIVELY OWNS OR ATTEMPTS TO BENEFICIALLY
     OWN OR CONSTRUCTIVELY OWN SHARES OF CAPITAL STOCK WHICH CAUSE OR WILL CAUSE
     A PERSON TO BENEFICIALLY OWN OR CONSTRUCTIVELY OWN SHARES OF CAPITAL STOCK
     IN EXCESS OR IN VIOLATION OF THE ABOVE LIMITATIONS MUST IMMEDIATELY NOTIFY
     THE CORPORATION.  IF ANY OF THE RESTRICTIONS ON TRANSFER OR OWNERSHIP ARE
     VIOLATED, THE SHARES OF CAPITAL STOCK REPRESENTED HEREBY WILL BE
     AUTOMATICALLY TRANSFERRED TO A CHARITABLE TRUSTEE OF A CHARITABLE TRUST FOR
     THE BENEFIT OF ONE OR MORE CHARITABLE BENEFICIARIES.  IN ADDITION, UPON THE
     OCCURRENCE OF CERTAIN EVENTS, ATTEMPTED TRANSFERS IN 

                                     - 2 -
<PAGE>
 
     VIOLATION OF THE RESTRICTIONS DESCRIBED ABOVE MAY BE VOID AB INITIO. A
                                                               -- ------
     PERSON WHO ATTEMPTS TO BENEFICIALLY OWN OR CONSTRUCTIVELY OWN SHARES OF
     CAPITAL STOCK IN VIOLATION OF THE OWNERSHIP LIMITATIONS DESCRIBED ABOVE
     SHALL HAVE NO CLAIM, CAUSE OF ACTION OR ANY RECOURSE WHATSOEVER AGAINST A
     TRANSFEROR OF SUCH SHARES OF CAPITAL STOCK. ALL CAPITALIZED TERMS IN THIS
     LEGEND HAVE THE MEANINGS DEFINED IN THE CORPORATION'S CHARTER, AS THE SAME
     MAY BE AMENDED FROM TIME TO TIME, A COPY OF WHICH, INCLUDING THE
     RESTRICTIONS ON TRANSFER AND OWNERSHIP, WILL BE FURNISHED TO EACH HOLDER OF
     SHARES OF CAPITAL STOCK OF THE CORPORATION ON REQUEST AND WITHOUT CHARGE.


                                     - 3 -
<PAGE>
 
                               Rights Certificate
                             HMC MERGER CORPORATION
                                        
          This certifies that        , or its registered assigns, is the
registered owner of the number of Rights set forth above, each of which entitles
the owner thereof, subject to the terms, provisions and conditions of the Rights
Agreement, dated as of ___________ ___, 1998 (the "Rights Agreement"), between
HMC MERGER CORPORATION, a Maryland corporation (the "Company"), and THE BANK OF
NEW YORK (the "Rights Agent"), to purchase from the Company at any time prior to
November 22, 2008 at the office or offices of the Rights Agent designated for
such purpose, or its successors as Rights Agent, one one-thousandth of a fully
paid, non-assessable share of Series A Junior Participating Preferred Stock, par
value $.01 per share (the "Preferred Stock") of the Company, at a purchase price
of $_____ per one one-thousandth share (the "Purchase Price"), upon presentation
and surrender of this Rights Certificate with the Form of Election to Purchase
and related Certificate duly executed.  The number of Rights evidenced by this
Rights Certificate (and the number of shares which may be purchased upon
exercise thereof) set forth above, and the Purchase Price per share set forth
above, are the number and Purchase Price as of ____________ __, ____, based on
the Preferred Stock as constituted at such date, and are subject to adjustment
upon the happening of certain events as provided in the Rights Agreement.

          From and after the occurrence of an event described in Section
11(a)(ii) of the Rights Agreement, the Rights evidenced by this Rights
Certificate beneficially owned by (i) an Acquiring Person or an Affiliate or
Associate of any such Person (as such terms are defined in the Rights
Agreement), which the Board of Directors, in their sole discretion, determine is
or was involved in or caused or facilitated, directly or indirectly (including
through any change in the Board), such Section 11(a)(ii) Event, (ii) a
transferee of any such Acquiring Person, Associate or Affiliate, or (iii) under
certain circumstances specified in the Rights Agreement, a transferee of a
person who, concurrently with or after such transfer, became an Acquiring Person
or an Affiliate or Associate of an Acquiring Person shall become null and void
and no holder hereof shall have any right with respect to such Rights from and
after the occurrence of such Section 11(a)(ii) Event.

          The Rights evidenced by this Rights Certificate shall not be
exercisable, and shall be void so long as held, by a holder in any jurisdiction
where the requisite qualification to the issuance to such holder, or the
exercise by such holder, of the Rights in such jurisdiction shall not have been
obtained or be obtainable.

          As provided in the Rights Agreement, the Purchase Price and the number
and kind of shares of Preferred Stock or other securities, which may be
purchased upon the exercise of the Rights evidenced by this Rights Certificate
are 


                                     - 4 -
<PAGE>
 
subject to modification and adjustment upon the happening of certain events,
including Triggering Events (as such term is defined in the Rights Agreement).

          This Rights Certificate is subject to all of the terms, provisions and
conditions of the Rights Agreement, which terms, provisions and conditions are
hereby incorporated herein by reference and made a part hereof and to which
Rights Agreement reference is hereby made for a full description of the rights,
limitations of rights, obligations, duties and immunities hereunder of the
Rights Agent, the Company and the holders of the Rights Certificates, which
limitations of rights include the temporary suspension of the exercisability of
such Rights under the specific circumstances set forth in the Rights Agreement.
Copies of the Rights Agreement are on file at the above-mentioned office of the
Rights Agent and are also available upon written request to the Rights Agent.

          This Rights Certificate, with or without other Rights Certificates,
upon surrender at the office or offices of the Rights Agent designated for such
purpose, may be exchanged for another Rights Certificate or Right Certificates
of like tenor and date evidencing Rights entitling the holder to purchase a like
aggregate number of one one-thousandths of a share of Preferred Stock as the
Rights evidenced by the Rights Certificate or Rights Certificates surrendered
shall have entitled such holder to purchase.  If this Rights Certificate shall
be exercised in part, the holder shall be entitled to receive upon surrender
hereof another Rights Certificate or Rights Certificates for the number of whole
Rights not exercised.

          Subject to the provisions of the Rights Agreement, the Rights
evidenced by this Certificate may be redeemed by the Company at its option at a
redemption price of $.005 per Right at any time prior to the earlier of the
close of business on (i) the tenth day following the Stock Acquisition Date (as
such time period may be changed in the discretion of the Board of Directors
pursuant to the Rights Agreement), and (ii) the Final Expiration Date (as
defined in the Rights Agreement).  Under certain circumstances set forth in the
Rights Agreement, the decision to redeem shall require the concurrence of two-
thirds of the Board of Directors.  After the expiration of the redemption
period, the Company's right of redemption may be reinstated if an Acquiring
Person reduces his beneficial ownership to 10% or less of the outstanding shares
of Common Stock in a transaction or series of transactions not involving the
Company, and such reinstatement is approved by the Company's Board of Directors.

          At any time after a person becomes an Acquiring Person, the Board of
Directors of the Company may exchange the Rights (other than Rights owned by
such Acquiring Person which have become void), in whole or in part, at an
exchange ratio of one share of Common Stock per Right (subject to adjustment).

          No fractional shares of Preferred Stock will be issued upon the
exercise of any Right or Rights evidenced hereby (other than fractions which are
integral 

                                     - 5 -
<PAGE>
 
multiples of one one-thousandth of a share of Preferred Stock, which may, at the
election of the Company, be evidenced by depositary receipts), but in lieu
thereof a cash payment will be made, as provided in the Rights Agreement.

          No holder of this Rights Certificate, as such, shall be entitled to
vote or receive dividends or be deemed for any purpose the holder of shares of
Preferred Stock or of any other securities of the Company which may at any time
be issuable on the exercise hereof, nor shall anything contained in the Rights
Agreement or herein be construed to confer upon the holder hereof, as such, any
of the rights of a stockholder of the Company or any right to vote for the
election of directors or upon any matter submitted to stockholders at any
meeting thereof, or to give or withhold consent to any corporate action, or to
receive notice of meetings or other actions affecting stockholders (except as
provided in the Rights Agreement), or to receive dividends or subscription
rights, or otherwise, until the Right or Rights evidenced by this Rights
Certificate shall have been exercised as provided in the Rights Agreement.

          This Rights Certificate shall not be valid or obligatory for any
purpose until it shall have been countersigned by the Rights Agent.

          WITNESS the facsimile signature of the proper officers of the Company
and its corporate seal.

Dated as of ____________ __, ____


ATTEST:                              HMC MERGER CORPORATION


By:________________________________  By:________________________________
Name:                                Name:
Title:                               Title:


COUNTERSIGNED:


THE BANK OF NEW YORK


By:________________________________
Name:
Title:

                                     - 6 -
                                                                                
<PAGE>
 
                  [Form of Reverse Side of Rights Certificate]



                               FORM OF ASSIGNMENT
                               ------------------


(To be executed by the registered holder if
such holder desires to transfer the
Rights Certificate.)


FOR VALUE RECEIVED _____________________________________________
hereby sells, assigns and transfers unto _______________________

______________________________________________________________________________
(Please print name and address of transferee)

______________________________________________________________________________ 
this Rights Certificate, together with all right, title and interest therein,
and does hereby irrevocably constitute and appoint ___________________________
Attorney, to transfer the within Rights Certificate on the books of the within-
named Company, with full power of substitution.


Dated: ____________ __, ____



                                    _____________________________     
                                    Signature


Signature Guaranteed:
<PAGE>
 
                                  Certificate
                                  -----------

          The undersigned hereby certifies by checking the appropriate boxes
that:

          (1) this Rights Certificate [ ] is [ ] is not being sold, assigned
and transferred by or on behalf of a Person who is or was an Acquiring Person or
an Affiliate or Associate of any such Person (as such terms are defined pursuant
to the Rights Agreement);



          (2) after due inquiry and to the best knowledge of the undersigned, it
[ ] did [ ] did not acquire the Rights evidenced by this Rights Certificate
from any Person who is, was or subsequently became an Acquiring Person or an
Affiliate or Associate of any such Person.


Dated: ____________ __, ____                 _______________________________
                                             Signature


Signature Guaranteed:
<PAGE>
 
                                     NOTICE
                                     ------


          The signature to the foregoing Assignment and Certificate must
correspond to the name as written upon the face of this Rights Certificate in
every particular, without alteration or enlargement or any change whatsoever.
<PAGE>
 
                          FORM OF ELECTION TO PURCHASE
                          ----------------------------

(To be executed if the registered holder
desires to exercise Rights represented
by the Rights Certificate.)


To:       ______________________________

          The undersigned hereby irrevocably elects to exercise ____________
Rights represented by this Rights Certificate to purchase the shares of
Preferred Stock issuable upon the exercise of the Rights (or such other
securities of the Company or of any other person which may be issuable upon the
exercise of the Rights) and requests that certificates for such shares be issued
in the name of and delivered to:


- ------------------------------------------------------------------------------- 
(Please print name and address)

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

Please insert social security
or other identifying number:
                            --------------------------------


          If such number of Rights shall not be all the Rights evidenced by this
Rights Certificate, a new Rights Certificate for the balance of such Rights
shall be registered in the name of and delivered to:

 
- --------------------------------------------------------------------------------
                        (Please print name and address)

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

Please insert social security
or other identifying number:
                            -------------------------------------

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

Dated: ____________ __, ____

                                  --------------------------------------------  
                                  Signature

Signature Guaranteed:
<PAGE>
 
                                  Certificate
                                  -----------

          The undersigned hereby certifies by checking the appropriate boxes
that:

          (1) the Rights evidenced by this Rights Certificate [ ] are [ ]
are not being exercised by or on behalf of a Person who is or was an Acquiring
Person or an Affiliate or Associate of any such Person (as such terms are
defined in the Rights Agreement);

          (2) after due inquiry and to the best knowledge of the undersigned, it
[ ] did [ ] did not acquire the Rights evidenced by this Rights Certificate
from any Person who is, was or became an Acquiring Person or an Affiliate or
Associate of any such Person.


Dated: ____________ __, ____      _______________________________________
                                  Signature


Signature Guaranteed:
<PAGE>
 
                                     NOTICE
                                     ------

          The signature to the foregoing Election to Purchase and Certificate
must correspond to the name as written upon the face of this Rights Certificate
in every particular, without alteration or enlargement or any change whatsoever.

<PAGE>
 
                                                                     EXHIBIT 4.2


                             HMC MERGER CORPORATION

         ______________________________________________________________
                ARTICLES SUPPLEMENTARY OF HMC MERGER CORPORATION
           CLASSIFYING AND DESIGNATING A SERIES OF PREFERRED STOCK AS
               SERIES A JUNIOR PARTICIPATING PREFERRED STOCK AND
                 FIXING DISTRIBUTION AND OTHER PREFERENCES AND
                             RIGHTS OF SUCH SERIES
         ______________________________________________________________
                                        

          HMC Merger Corporation, a Maryland corporation (the "Corporation"),
hereby certifies to the State Department of Assessments and Taxation of Maryland
pursuant to Section 2-105(9) of the Annotated Code of Maryland that:

          FIRST:  Pursuant to authority granted by the Articles of Incorporation
of the Corporation, the Board of Directors on November 23, 1998 adopted a
resolution designating and classifying 650,000 unissued shares of Preferred
Stock as Series A Junior Participating Preferred Stock.

          SECOND:  The following is a description of the Series A Junior
Participating Preferred Stock, including the preferences, conversion and other
rights, voting powers, restrictions, limitations as to dividends,
qualifications, and terms and conditions of redemption thereof:

          Section 1.  Designation and Amount.  The shares of such series of
                      ----------------------                               
Preferred Stock, par value $.01 per share, shall be designated as "Series A
Junior Participating Preferred Stock" and the number of shares constituting such
series shall be 650,000.  Such number of shares may be increased or decreased by
resolution of the Board of Directors and by the filing of articles supplementary
in accordance with the Maryland General Corporation Law; provided, that no
decrease shall reduce the number of shares of Series A Junior Participating
Preferred Stock to a number less than the number of shares then outstanding plus
the number of shares reserved for issuance upon the exercise of outstanding
options, rights or warrants or upon the conversion of any outstanding securities
issued by the Corporation convertible into Series A Junior Participating
Preferred Stock.
<PAGE>
 
          Section 2.  Dividends and Distributions.
                      --------------------------- 

          (A) Subject to the prior and superior rights of the holders of any
shares of any series of Preferred Stock (or any similar stock) ranking prior and
superior to the shares of Series A Junior Participating Preferred Stock with
respect to dividends, the holders of shares of Series A Junior Participating
Preferred Stock shall be entitled to receive, when, as and if declared by the
Board of Directors out of funds legally available for the purpose, quarterly
dividends payable in cash on the 15th day of April, July, October and January,
in each year (each such date being referred to herein as a "Quarterly Dividend
Payment Date"), commencing on the first Quarterly Dividend Payment Date after
first issuance of a share or fraction of a share of Series A Junior
Participating Preferred Stock, in an amount per share (rounded to the nearest
cent) equal to the greater of (a) $10.00 or (b) subject to the provision for
adjustment hereinafter set forth, one thousand (1,000) times the aggregate per
share amount of all cash dividends, and one thousand (1,000) times the aggregate
per share amount (payable in kind) of all non-cash dividends or other
distributions (other than a dividend payable in shares of common stock, par
value $.01 per share, of the Corporation (the "Common Stock"), or a subdivision
of the outstanding shares of Common Stock (by reclassification or otherwise))
declared on the Common Stock, since the immediately preceding Quarterly Dividend
Payment Date, or, with respect to the first Quarterly Dividend Payment Date,
since the first issuance of any share or fraction of a share of Series A Junior
Participating Preferred Stock.  In the event the Corporation shall at any time
after November 23, 1998 (the "Rights Declaration Date") (i) declare or pay any
dividend on Common Stock payable in shares of Common Stock, (ii) subdivide the
outstanding Common Stock, or (iii) combine the outstanding Common Stock into a
smaller number of shares, then in each such case the amount to which holders of
shares of Series A Junior Participating Preferred Stock were entitled
immediately prior to such event under clause (b) of the preceding sentence shall
be adjusted by multiplying such amount by a fraction, the numerator of which is
the number of shares of Common Stock outstanding immediately after such event
and the denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event.

          (B) The Corporation shall declare a dividend or distribution on the
Series A Junior Participating Preferred Stock as provided in paragraph (A) above
immediately after it declares a dividend or distribution on the Common Stock
(other than a dividend payable in shares of Common Stock); provided that, in the
event no dividend or distribution shall have been declared on the Common Stock
during the period between any Quarterly Dividend Payment Date and the next
subsequent Quarterly Dividend Payment Date, a dividend of $10.00 per share on
the Series A Junior Participating Preferred 


                                     - 2 -
<PAGE>
 
Stock shall nevertheless be payable on such subsequent Quarterly Dividend
Payment Date.

          (C) Dividends shall begin to accrue and be cumulative on outstanding
shares of Series A Junior Participating Preferred Stock from the Quarterly
Dividend Payment Date next preceding the date of issue of such shares of Series
A Junior Participating Preferred Stock, unless the date of issue of such shares
is prior to the record date set for the first Quarterly Dividend Payment Date,
in which case dividends on such shares shall begin to accrue from the date of
issue of such shares, or unless the date of issue is a Quarterly Dividend
Payment Date or is a date after the record date for the determination of holders
of shares of Series A Junior Participating Preferred Stock entitled to receive a
quarterly dividend and before such Quarterly Dividend Payment Date, in either of
which events such dividends shall begin to accrue and be cumulative from such
Quarterly Dividend Payment Date.  Accrued but unpaid dividends shall not bear
interest.  Dividends paid on the shares of Series A Junior Participating
Preferred Stock in an amount less than the total amount of such dividends at the
time accrued and payable on such shares shall be allocated pro rata on a share-
by-share basis among all such shares at the time outstanding.  The Board of
Directors may fix a record date for the determination of holders of shares of
Series A Junior Participating Preferred Stock entitled to receive payment of a
dividend or distribution declared thereon, which record date shall be no more
than 60 days prior to the date fixed for the payment thereof.

          Section 3.  Voting Rights.  The holders of shares of Series A Junior
                      -------------                                           
Participating Preferred Stock shall have the following voting rights:

          (A) Subject to the provision for adjustment hereinafter set forth,
each share of Series A Junior Participating Preferred Stock shall entitle the
holder thereof to one thousand (1,000) votes on all matters submitted to a vote
of the stockholders of the Corporation.  In the event the Corporation shall at
any time after the Rights Declaration Date (i) declare any dividend on Common
Stock payable in shares of Common Stock, (ii) subdivide the outstanding Common
Stock, or (iii) combine the outstanding Common Stock into a smaller number of
shares, then in each such case the number of votes per share to which holders of
shares of Series A Junior Participating Preferred Stock were entitled
immediately prior to such event shall be adjusted by multiplying such number by
a fraction the numerator of which is the number of shares of Common Stock
outstanding immediately after such event and the denominator of which is the
number of shares of Common Stock that were outstanding immediately prior to such
event.

          (B) Except as otherwise provided by law, the holders of shares of
Series A Junior Participating Preferred Stock and the holders of shares of


                                     - 3 -
<PAGE>
 
Common Stock and any other stock of the Corporation having general voting rights
shall vote together as one class on all matters submitted to a vote of
stockholders of the Corporation.

          (C) Except as set forth herein, holders of Series A Junior
Participating Preferred Stock shall have no special voting rights and their
consent shall not be required (except to the extent they are entitled to vote
with holders of Common Stock as set forth herein) for taking any corporate
action.

          Section 4.  Certain Restrictions.
                      -------------------- 

          (A) Whenever dividends or distributions payable on the Series A Junior
Participating Preferred Stock as provided in Section 2 are not paid, thereafter
and until such dividends and distributions, whether or not declared, on shares
of Series A Junior Participating Preferred Stock outstanding shall have been
paid in full, the Corporation shall not:

          (i) declare or pay dividends on, or make any other distributions on,
or redeem or purchase or otherwise acquire for consideration any shares of stock
ranking junior (either as to dividends or upon liquidation, dissolution or
winding up) to the Series A Junior Participating Preferred Stock; or

          (ii) declare or pay dividends on, or make any other distributions on,
any shares of stock ranking on a parity (either as to dividends or upon
liquidation, dissolution or winding up) with the Series A Junior Participating
Preferred Stock, except dividends paid ratably on the Series A Junior
Participating Preferred Stock and all such parity stock on which dividends are
payable in proportion to the total amounts to which the holders of all such
shares are then entitled; or

          (iii)     redeem or purchase or otherwise acquire for consideration
shares of any stock ranking on a parity (either as to dividends or upon
liquidation, dissolution or winding up) with the Series A Junior Participating
Preferred Stock, provided that the Corporation may at any time redeem, purchase
or otherwise acquire shares of any such parity stock in exchange for shares of
any stock of the Corporation ranking junior (either as to dividends or upon
dissolution, liquidation or winding up) to the Series A Junior Participating
Preferred Stock; or

          (iv) redeem or purchase or otherwise acquire for consideration any
shares of Series A Junior Participating Preferred Stock, or any shares of stock
ranking on a parity with the Series A Junior Participating Preferred Stock,
except in accordance with a purchase offer made in writing or 


                                     - 4 -
<PAGE>
 
by publication (as determined by the Board of Directors) to all holders of such
shares upon such terms as the Board of Directors, after consideration of the
respective annual dividend rates and other relative rights and preferences of
the respective Series A and classes, shall determine in good faith will result
in fair and equitable treatment among the respective series or classes.

          (B) The Corporation shall not permit any subsidiary of the Corporation
to purchase or otherwise acquire for consideration any shares of stock of the
Corporation unless the Corporation could, under paragraph (A) of this Section 4,
purchase or otherwise acquire such shares at such time and in such manner.

          Section 5.   Reacquired Shares.  Any shares of Series A Junior
                       -----------------                                
Participating Preferred Stock purchased or otherwise acquired by the Corporation
in any manner whatsoever shall be retired and canceled promptly after the
acquisition thereof.  All such shares shall upon their cancellation become
authorized but unissued shares of Preferred Stock and may be reissued as part of
a new series of Preferred Stock to be created by resolution or resolutions of
the Board of Directors, subject to the conditions and restrictions on issuance
set forth herein, or reclassified as Common Stock or other stock of the
Corporation as provided in the Corporation's Articles of Incorporation.

          Section 6.  Liquidation, Dissolution or Winding Up.
                      -------------------------------------- 

          (A) Upon any liquidation (voluntary or otherwise), dissolution or
winding up of the Corporation, no distribution shall be made to the holders of
shares of stock ranking junior (either as to dividends or upon liquidation,
dissolution or winding up) to the Series A Junior Participating Preferred Stock
unless, prior thereto, the holders of shares of Series A Junior Participating
Preferred Stock shall have received $55,000 per share, plus any unpaid dividends
and distributions payable thereon, whether or not declared, to the date of such
payment (the "Series A Liquidation Preference").  Following the payment of the
full amount of the Series A Liquidation Preference, no additional distributions
shall be made to the holders of Series A Junior Participating Preferred Stock
unless, prior thereto, the holders of shares of Common Stock shall have received
an amount per share (the "Common Adjustment") equal to the quotient obtained by
dividing (i) the Series A Liquidation Preference by (ii) 1,000 (as appropriately
adjusted as set forth in subparagraph (C) below to reflect such events as stock
splits, stock dividends and recapitalizations with respect to the Common Stock)
(such number in clause (ii) immediately above as so adjusted being referred to
as the "Adjustment Number").  Following the payment of the full amount of the
Series A Liquidation Preference and the Common Adjustment in respect of all
outstanding shares of Series A Junior Participating Preferred Stock and 


                                     - 5 -
<PAGE>
 
Common Stock, respectively, holders of Series A Junior Participating Preferred
Stock and holders of shares of Common Stock shall receive their ratable and
proportionate share of the remaining assets to be distributed in the ratio of
the Adjustment Number to one (1) with respect to such Series A Junior
Participating Preferred Stock and Common Stock, on a per share basis,
respectively.

          (B) In the event, however, that there are not sufficient assets
available to permit payment in full of the Series A Liquidation Preference and
the liquidation preferences of all other series of preferred stock, if any,
which rank on a parity with the Series A Junior Participating Preferred Stock,
then such remaining assets shall be distributed ratably to the holders of such
parity shares in proportion to their respective liquidation preferences.  In the
event, however, that there are sufficient assets available to permit payment in
full of the Common Adjustment, then such remaining assets shall be distributed
ratably to the holders of Common Stock.

          (C) In the event the Corporation shall at any time after the Rights
Declaration Date (i) declare any dividend on Common Stock payable in shares of
Common Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine the
outstanding Common Stock into a smaller number of shares, then in each such case
the Adjustment Number in effect immediately prior to such event shall be
adjusted by multiplying such Adjustment Number by a fraction the numerator of
which is the number of shares of Common Stock outstanding immediately after such
event and the denominator of which is the number of shares of Common Stock that
were outstanding immediately prior to such event.

          Section 7.  Consolidation, Merger, etc.  In case the Corporation shall
                      ---------------------------                               
enter into any consolidation, merger, combination or other transaction in which
the shares of Common Stock are exchanged for or changed into other stock or
securities, cash and/or any other property, then in any such case the shares of
Series A Junior Participating Preferred Stock shall at the same time be
similarly exchanged or changed into such stock or securities, cash and/or any
other property in an amount per share (subject to the provision for adjustment
hereinafter set forth) equal to one thousand (1,000) times the aggregate amount
of stock, securities, cash and/or any other property (payable in kind), as the
case may be, into which or for which each share of Common Stock is changed or
exchanged.  In the event the Corporation shall at any time after the Rights
Declaration Date (i) declare any dividend on Common Stock payable in shares of
Common Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine the
outstanding Common Stock into a smaller number of shares, then in each such case
the amount set forth in the preceding sentence with respect to the exchange or
change of shares of Series A Junior Participating Preferred Stock 


                                     - 6 -
<PAGE>
 
(as previously adjusted, if any prior adjustment has occurred) shall be adjusted
by multiplying such amount by a fraction the numerator of which is the number of
shares of Common Stock outstanding immediately after such event and the
denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event.

          Section 8.  Redemption.  The outstanding shares of Series A Junior
                      ----------                                            
Participating Preferred Stock may be redeemed as a whole, but not in part, at
any time, or from time to time, at the option of the Board, at a cash price per
share equal to 105 percent of (i) the product of the Adjustment Number times the
Average Market Value (as such term is hereinafter defined) of the Common Stock,
plus (ii) all dividends which on the redemption date are payable on the shares
to be redeemed and have not been paid, or declared and a sum sufficient for the
payment thereof set apart, without interest.  The "Average Market Value" is the
average of the closing sale prices of the Common Stock during the 30 day period
immediately preceding the date before the redemption date on the Composite Tape
for New York Stock Exchange Listed Stocks, or, if such stock is not quoted on
the Composite Tape, on the New York Stock Exchange, or, if such stock is not
listed on such Exchange, on the principal United States securities exchange
registered under the Securities Exchange Act of 1934, as amended, on which such
stock is listed, or, if such stock is not listed on any such exchange, the
average of the closing sale prices with respect to a share of Common Stock
during such 30 day period, as quoted on the National Association of Securities
Dealers, Inc. Automated Quotations System or any system then in use, or if no
such quotations are available, the fair market value of the Common Stock as
determined by the Board in good faith.

          Section 9.  Ranking.  Notwithstanding anything contained herein to the
                      -------                                                   
contrary, the Series A Junior Participating Preferred Stock shall rank junior to
all other series of the Corporation's Preferred Stock as to voting rights, the
payment of dividends and the distribution of assets in liquidation, unless the
terms of any such series shall provide otherwise.

          Section 10.  Amendment. The Articles of Incorporation of the
                       ---------                                      
Corporation shall not be further amended, nor shall an Articles Supplementary be
filed or amended, in any manner which would materially alter or change the
powers, preferences or special rights of the Series A Junior Participating
Preferred Stock so as to affect them adversely without the affirmative vote of
the holders of at least a majority of the outstanding shares of Series A Junior
Participating Preferred Stock, voting separately as a class.

          Section 11.  Fractional Shares.  Series A Junior Participating
                       -----------------                                
Preferred Stock may be issued in fractions of a share which shall entitle the


                                     - 7 -
<PAGE>
 
holders, in proportion to such holders' fractional shares, to exercise voting
rights, receive dividends, participate in distributions and have the benefit of
all other rights of holders of Series A Junior Participating Preferred Stock.

          IN WITNESS WHEREOF, HMC Merger Corporation has caused these Articles
Supplementary to be signed in its name and on its behalf by its President and
attested by its Secretary on December 29, 1998.


                                 HMC MERGER CORPORATION


                                 By:___________________________________
                                    Terence C. Golden
                                    President



Attest:
       ----------------------- 
       Christopher G. Townsend
       Secretary


          I, Terence C. Golden, President of HMC Merger Corporation hereby
acknowledge the foregoing Articles Supplementary of HMC Merger Corporation to be
the corporate act of HMC Merger Corporation, and to the best of my knowledge,
information and belief, these matters and facts are true in all material
respects, and my statement is made under penalties of perjury.



                                  ___________________________________
                                  Terence C. Golden
                                  President



                                     - 8 -

<PAGE>
 
                                                                     EXHIBIT 4.3
                                                                                

                          [Form of Rights Certificate]


            Certificate No. R-__________          __________ Rights

     NOT EXERCISABLE AFTER ____________ __, 2008 OR EARLIER IF REDEEMED OR
     EXCHANGED BY THE COMPANY.  THE RIGHTS ARE SUBJECT TO REDEMPTION, AT THE
     OPTION OF THE COMPANY, AT $.005 PER RIGHT ON THE TERMS SET FORTH IN THE
     RIGHTS AGREEMENT.  UNDER CERTAIN CIRCUMSTANCES, RIGHTS BENEFICIALLY OWNED
     BY AN ACQUIRING PERSON OR AN AFFILIATE OR ASSOCIATE OF ANY SUCH PERSON (AS
     SUCH TERMS ARE DEFINED IN THE RIGHTS AGREEMENT) AND ANY SUBSEQUENT HOLDER
     OF SUCH RIGHTS MAY BECOME NULL AND VOID.  THE RIGHTS SHALL NOT BE
     EXERCISABLE, AND SHALL BE VOID SO LONG AS HELD, BY A HOLDER IN ANY
     JURISDICTION WHERE THE REQUISITE QUALIFICATION TO THE ISSUANCE TO SUCH
     HOLDER, OR THE EXERCISE BY SUCH HOLDER, OF THE RIGHTS IN SUCH JURISDICTION
     SHALL NOT HAVE BEEN OBTAINED OR BE OBTAINABLE.  [THE RIGHTS REPRESENTED BY
     THIS RIGHTS CERTIFICATE ARE OR WERE BENEFICIALLY OWNED BY A PERSON WHO WAS
     OR BECAME AN ACQUIRING PERSON OR AN AFFILIATE OR ASSOCIATE OF AN ACQUIRING
     PERSON (AS SUCH TERMS ARE DEFINED IN THE RIGHTS AGREEMENT).  ACCORDINGLY,
     THIS RIGHTS CERTIFICATE AND THE RIGHTS REPRESENTED HEREBY MAY BECOME NULL
     AND VOID IN THE CIRCUMSTANCES SPECIFIED IN SECTION 7(e) OF SUCH 
     AGREEMENT.]  */
                  - 

     THE SHARES OF CAPITAL STOCK REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO
     RESTRICTIONS ON BENEFICIAL OWNERSHIP AND CONSTRUCTIVE OWNERSHIP AND
     TRANSFER PRIMARILY FOR THE PURPOSE OF THE CORPORATION'S MAINTENANCE OF ITS
     STATUS AS A REAL ESTATE INVESTMENT TRUST (A "REIT") UNDER THE INTERNAL
     REVENUE CODE OF 1986, AS AMENDED (THE "CODE").  SUBJECT TO CERTAIN FURTHER
     RESTRICTIONS AND EXCEPT AS EXPRESSLY PROVIDED IN THE CORPORATION'S CHARTER,
     (I) NO PERSON MAY BENEFICIALLY OWN OR CONSTRUCTIVELY OWN SHARES OF COMMON
     STOCK OF THE CORPORATION IN EXCESS OF 9.8 PERCENT (IN VALUE OR NUMBER OF
     SHARES) OF THE OUTSTANDING COMMON SHARES OF THE CORPORATION UNLESS SUCH
     PERSON IS AN EXCEPTED HOLDER (IN WHICH CASE THE EXCEPTED HOLDER LIMIT SHALL
     BE APPLICABLE) OR AN EXCLUDED HOLDER (IN WHICH CASE THE EXCLUDED HOLDER
     LIMIT SHALL BE APPLICABLE); (II) WITH RESPECT TO ANY CLASS OR SERIES OF
     SHARES OF CAPITAL STOCK OTHER THAN COMMON STOCK, NO PERSON MAY BENEFICIALLY

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

*/  The portion of the legend in brackets shall be inserted only if applicable
- -                                                                             
and shall replace the preceding sentence.
<PAGE>
 
     OWN OR CONSTRUCTIVELY OWN MORE THAN 9.8 PERCENT (IN VALUE OR NUMBER OF
     SHARES) OF THE OUTSTANDING SHARES OF SUCH CLASS OR SERIES OF SUCH STOCK OF
     THE CORPORATION, UNLESS SUCH PERSON IS AN EXCEPTED HOLDER (IN WHICH CASE
     THE EXCEPTED HOLDER LIMIT SHALL BE APPLICABLE) OR AN EXCLUDED HOLDER (IN
     WHICH CASE THE EXCLUDED HOLDER LIMIT SHALL BE APPLICABLE); (III) NO PERSON
     MAY BENEFICIALLY OWN OR CONSTRUCTIVELY OWN SHARES OF CAPITAL STOCK THAT
     WOULD RESULT IN THE CORPORATION BEING "CLOSELY HELD" UNDER SECTION 856(H)
     OF THE CODE, WOULD CAUSE EITHER THE CORPORATION TO BE CONSIDERED TO
     CONSTRUCTIVELY OWN AN INTEREST IN A TENANT THAT IS DESCRIBED IN SECTION
     856(D)(2)(B) OF THE CODE PURPOSES OF APPLYING SECTION 856(C) OF THE CODE OR
     HOST MARRIOTT, L.P. TO BE CONSIDERED TO CONSTRUCTIVELY OWN AN INTEREST IN A
     TENANT THAT IS DESCRIBED IN SECTION 856(D)(2)(B) OF THE CODE FOR PURPOSES
     OF APPLYING SECTION 7704(D) OF THE CODE, OR OTHERWISE WOULD CAUSE THE
     CORPORATION TO FAIL TO QUALIFY AS A REIT; AND (IV) NO PERSON MAY TRANSFER
     SHARES OF CAPITAL STOCK IF SUCH TRANSFER WOULD RESULT IN SHARES OF CAPITAL
     STOCK OF THE CORPORATION BEING OWNED BY FEWER THAN 100 PERSONS.  ANY PERSON
     WHO BENEFICIALLY OWNS OR CONSTRUCTIVELY OWNS OR ATTEMPTS TO BENEFICIALLY
     OWN OR CONSTRUCTIVELY OWN SHARES OF CAPITAL STOCK WHICH CAUSE OR WILL CAUSE
     A PERSON TO BENEFICIALLY OWN OR CONSTRUCTIVELY OWN SHARES OF CAPITAL STOCK
     IN EXCESS OR IN VIOLATION OF THE ABOVE LIMITATIONS MUST IMMEDIATELY NOTIFY
     THE CORPORATION.  IF ANY OF THE RESTRICTIONS ON TRANSFER OR OWNERSHIP ARE
     VIOLATED, THE SHARES OF CAPITAL STOCK REPRESENTED HEREBY WILL BE
     AUTOMATICALLY TRANSFERRED TO A CHARITABLE TRUSTEE OF A CHARITABLE TRUST FOR
     THE BENEFIT OF ONE OR MORE CHARITABLE BENEFICIARIES.  IN ADDITION, UPON THE
     OCCURRENCE OF CERTAIN EVENTS, ATTEMPTED TRANSFERS IN 

                                     - 2 -
<PAGE>
 
     VIOLATION OF THE RESTRICTIONS DESCRIBED ABOVE MAY BE VOID AB INITIO. A
                                                               -- ------
     PERSON WHO ATTEMPTS TO BENEFICIALLY OWN OR CONSTRUCTIVELY OWN SHARES OF
     CAPITAL STOCK IN VIOLATION OF THE OWNERSHIP LIMITATIONS DESCRIBED ABOVE
     SHALL HAVE NO CLAIM, CAUSE OF ACTION OR ANY RECOURSE WHATSOEVER AGAINST A
     TRANSFEROR OF SUCH SHARES OF CAPITAL STOCK. ALL CAPITALIZED TERMS IN THIS
     LEGEND HAVE THE MEANINGS DEFINED IN THE CORPORATION'S CHARTER, AS THE SAME
     MAY BE AMENDED FROM TIME TO TIME, A COPY OF WHICH, INCLUDING THE
     RESTRICTIONS ON TRANSFER AND OWNERSHIP, WILL BE FURNISHED TO EACH HOLDER OF
     SHARES OF CAPITAL STOCK OF THE CORPORATION ON REQUEST AND WITHOUT CHARGE.


                                     - 3 -
<PAGE>
 
                               Rights Certificate
                             HMC MERGER CORPORATION
                                        
          This certifies that        , or its registered assigns, is the
registered owner of the number of Rights set forth above, each of which entitles
the owner thereof, subject to the terms, provisions and conditions of the Rights
Agreement, dated as of ___________ ___, 1998 (the "Rights Agreement"), between
HMC MERGER CORPORATION, a Maryland corporation (the "Company"), and THE BANK OF
NEW YORK (the "Rights Agent"), to purchase from the Company at any time prior to
November 22, 2008 at the office or offices of the Rights Agent designated for
such purpose, or its successors as Rights Agent, one one-thousandth of a fully
paid, non-assessable share of Series A Junior Participating Preferred Stock, par
value $.01 per share (the "Preferred Stock") of the Company, at a purchase price
of $_____ per one one-thousandth share (the "Purchase Price"), upon presentation
and surrender of this Rights Certificate with the Form of Election to Purchase
and related Certificate duly executed.  The number of Rights evidenced by this
Rights Certificate (and the number of shares which may be purchased upon
exercise thereof) set forth above, and the Purchase Price per share set forth
above, are the number and Purchase Price as of ____________ __, ____, based on
the Preferred Stock as constituted at such date, and are subject to adjustment
upon the happening of certain events as provided in the Rights Agreement.

          From and after the occurrence of an event described in Section
11(a)(ii) of the Rights Agreement, the Rights evidenced by this Rights
Certificate beneficially owned by (i) an Acquiring Person or an Affiliate or
Associate of any such Person (as such terms are defined in the Rights
Agreement), which the Board of Directors, in their sole discretion, determine is
or was involved in or caused or facilitated, directly or indirectly (including
through any change in the Board), such Section 11(a)(ii) Event, (ii) a
transferee of any such Acquiring Person, Associate or Affiliate, or (iii) under
certain circumstances specified in the Rights Agreement, a transferee of a
person who, concurrently with or after such transfer, became an Acquiring Person
or an Affiliate or Associate of an Acquiring Person shall become null and void
and no holder hereof shall have any right with respect to such Rights from and
after the occurrence of such Section 11(a)(ii) Event.

          The Rights evidenced by this Rights Certificate shall not be
exercisable, and shall be void so long as held, by a holder in any jurisdiction
where the requisite qualification to the issuance to such holder, or the
exercise by such holder, of the Rights in such jurisdiction shall not have been
obtained or be obtainable.

          As provided in the Rights Agreement, the Purchase Price and the number
and kind of shares of Preferred Stock or other securities, which may be
purchased upon the exercise of the Rights evidenced by this Rights Certificate
are 


                                     - 4 -
<PAGE>
 
subject to modification and adjustment upon the happening of certain events,
including Triggering Events (as such term is defined in the Rights Agreement).

          This Rights Certificate is subject to all of the terms, provisions and
conditions of the Rights Agreement, which terms, provisions and conditions are
hereby incorporated herein by reference and made a part hereof and to which
Rights Agreement reference is hereby made for a full description of the rights,
limitations of rights, obligations, duties and immunities hereunder of the
Rights Agent, the Company and the holders of the Rights Certificates, which
limitations of rights include the temporary suspension of the exercisability of
such Rights under the specific circumstances set forth in the Rights Agreement.
Copies of the Rights Agreement are on file at the above-mentioned office of the
Rights Agent and are also available upon written request to the Rights Agent.

          This Rights Certificate, with or without other Rights Certificates,
upon surrender at the office or offices of the Rights Agent designated for such
purpose, may be exchanged for another Rights Certificate or Right Certificates
of like tenor and date evidencing Rights entitling the holder to purchase a like
aggregate number of one one-thousandths of a share of Preferred Stock as the
Rights evidenced by the Rights Certificate or Rights Certificates surrendered
shall have entitled such holder to purchase.  If this Rights Certificate shall
be exercised in part, the holder shall be entitled to receive upon surrender
hereof another Rights Certificate or Rights Certificates for the number of whole
Rights not exercised.

          Subject to the provisions of the Rights Agreement, the Rights
evidenced by this Certificate may be redeemed by the Company at its option at a
redemption price of $.005 per Right at any time prior to the earlier of the
close of business on (i) the tenth day following the Stock Acquisition Date (as
such time period may be changed in the discretion of the Board of Directors
pursuant to the Rights Agreement), and (ii) the Final Expiration Date (as
defined in the Rights Agreement).  Under certain circumstances set forth in the
Rights Agreement, the decision to redeem shall require the concurrence of two-
thirds of the Board of Directors.  After the expiration of the redemption
period, the Company's right of redemption may be reinstated if an Acquiring
Person reduces his beneficial ownership to 10% or less of the outstanding shares
of Common Stock in a transaction or series of transactions not involving the
Company, and such reinstatement is approved by the Company's Board of Directors.

          At any time after a person becomes an Acquiring Person, the Board of
Directors of the Company may exchange the Rights (other than Rights owned by
such Acquiring Person which have become void), in whole or in part, at an
exchange ratio of one share of Common Stock per Right (subject to adjustment).

          No fractional shares of Preferred Stock will be issued upon the
exercise of any Right or Rights evidenced hereby (other than fractions which are
integral 

                                     - 5 -
<PAGE>
 
multiples of one one-thousandth of a share of Preferred Stock, which may, at the
election of the Company, be evidenced by depositary receipts), but in lieu
thereof a cash payment will be made, as provided in the Rights Agreement.

          No holder of this Rights Certificate, as such, shall be entitled to
vote or receive dividends or be deemed for any purpose the holder of shares of
Preferred Stock or of any other securities of the Company which may at any time
be issuable on the exercise hereof, nor shall anything contained in the Rights
Agreement or herein be construed to confer upon the holder hereof, as such, any
of the rights of a stockholder of the Company or any right to vote for the
election of directors or upon any matter submitted to stockholders at any
meeting thereof, or to give or withhold consent to any corporate action, or to
receive notice of meetings or other actions affecting stockholders (except as
provided in the Rights Agreement), or to receive dividends or subscription
rights, or otherwise, until the Right or Rights evidenced by this Rights
Certificate shall have been exercised as provided in the Rights Agreement.

          This Rights Certificate shall not be valid or obligatory for any
purpose until it shall have been countersigned by the Rights Agent.

          WITNESS the facsimile signature of the proper officers of the Company
and its corporate seal.

Dated as of ____________ __, ____


ATTEST:                              HMC MERGER CORPORATION


By:________________________________  By:________________________________
Name:                                Name:
Title:                               Title:


COUNTERSIGNED:


THE BANK OF NEW YORK


By:________________________________
Name:
Title:

                                     - 6 -
                                                                                
<PAGE>
 
                  [Form of Reverse Side of Rights Certificate]



                               FORM OF ASSIGNMENT
                               ------------------


(To be executed by the registered holder if
such holder desires to transfer the
Rights Certificate.)


FOR VALUE RECEIVED _____________________________________________
hereby sells, assigns and transfers unto _______________________

______________________________________________________________________________
(Please print name and address of transferee)

______________________________________________________________________________ 
this Rights Certificate, together with all right, title and interest therein,
and does hereby irrevocably constitute and appoint ___________________________
Attorney, to transfer the within Rights Certificate on the books of the within-
named Company, with full power of substitution.


Dated: ____________ __, ____



                                    _____________________________     
                                    Signature


Signature Guaranteed:
<PAGE>
 
                                  Certificate
                                  -----------

          The undersigned hereby certifies by checking the appropriate boxes
that:

          (1) this Rights Certificate [ ] is [ ] is not being sold, assigned
and transferred by or on behalf of a Person who is or was an Acquiring Person or
an Affiliate or Associate of any such Person (as such terms are defined pursuant
to the Rights Agreement);



          (2) after due inquiry and to the best knowledge of the undersigned, it
[ ] did [ ] did not acquire the Rights evidenced by this Rights Certificate
from any Person who is, was or subsequently became an Acquiring Person or an
Affiliate or Associate of any such Person.


Dated: ____________ __, ____                 _______________________________
                                             Signature


Signature Guaranteed:
<PAGE>
 
                                     NOTICE
                                     ------


          The signature to the foregoing Assignment and Certificate must
correspond to the name as written upon the face of this Rights Certificate in
every particular, without alteration or enlargement or any change whatsoever.
<PAGE>
 
                          FORM OF ELECTION TO PURCHASE
                          ----------------------------

(To be executed if the registered holder
desires to exercise Rights represented
by the Rights Certificate.)


To:       ______________________________

          The undersigned hereby irrevocably elects to exercise ____________
Rights represented by this Rights Certificate to purchase the shares of
Preferred Stock issuable upon the exercise of the Rights (or such other
securities of the Company or of any other person which may be issuable upon the
exercise of the Rights) and requests that certificates for such shares be issued
in the name of and delivered to:


- ------------------------------------------------------------------------------- 
(Please print name and address)

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

Please insert social security
or other identifying number:
                            --------------------------------


          If such number of Rights shall not be all the Rights evidenced by this
Rights Certificate, a new Rights Certificate for the balance of such Rights
shall be registered in the name of and delivered to:

 
- --------------------------------------------------------------------------------
                        (Please print name and address)

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

Please insert social security
or other identifying number:
                            -------------------------------------

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

Dated: ____________ __, ____

                                  --------------------------------------------  
                                  Signature

Signature Guaranteed:
<PAGE>
 
                                  Certificate
                                  -----------

          The undersigned hereby certifies by checking the appropriate boxes
that:

          (1) the Rights evidenced by this Rights Certificate [ ] are [ ]
are not being exercised by or on behalf of a Person who is or was an Acquiring
Person or an Affiliate or Associate of any such Person (as such terms are
defined in the Rights Agreement);

          (2) after due inquiry and to the best knowledge of the undersigned, it
[ ] did [ ] did not acquire the Rights evidenced by this Rights Certificate
from any Person who is, was or became an Acquiring Person or an Affiliate or
Associate of any such Person.


Dated: ____________ __, ____      _______________________________________
                                  Signature


Signature Guaranteed:
<PAGE>
 
                                     NOTICE
                                     ------

          The signature to the foregoing Election to Purchase and Certificate
must correspond to the name as written upon the face of this Rights Certificate
in every particular, without alteration or enlargement or any change whatsoever.


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