RENTAL SERVICE CORP
8-K, 1999-04-16
EQUIPMENT RENTAL & LEASING, NEC
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<PAGE>
 
                      SECURITIES AND EXCHANGE COMMISSION

                            Washington, D.C.  20549


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

                                   Form 8-K

                                CURRENT REPORT

                    Pursuant to Section 13 or 15(d) of the


                        Securities Exchange Act of 1934

       Date of report (Date of earliest event reported):  April 16, 1999

                          Rental Service Corporation
              --------------------------------------------------

            (Exact name of registrant as specified in its charter)

   Delaware                      000-21237                       33-0569350
- --------------            ----------------------            -------------------
   (State of             (Commission File Number)              (IRS Employer
Incorporation)                                              Identification No.)

            6929 E. Greenway Pkwy., Suite 200, Scottsdale, Arizona
    ----------------------------------------------------------------------
              (Address of principal executive offices) (Zip Code)

                                (480) 905-3300
                ----------------------------------------------
             (Registrant's telephone number, including area code)

                 ---------------------------------------------
         (former name or former address, if changed since last report)
<PAGE>
 
Item 5.   Other Events.

     On April 15, 1999 the Board of Directors of Rental Service Corporation (the
"Company") adopted a Stockholder Rights Plan.

     In connection with the Rights Plan, the Board of Directors of the Company
declared a dividend of one preferred share purchase right (the "Rights") for
each outstanding share of common stock, par value $.01 per share (the "Common
Shares"), of the Company outstanding at the close of business on April 30, 1999
(the "Record Date"). Each Right will entitle the registered holder thereof,
after the Rights become exercisable and until April 16, 2009 (or the earlier
redemption, exchange or termination of the Rights), to purchase from the Company
one one-thousandth (1/1,000th) of a share of Series A Junior Participating
Preferred Stock, par value $.01 per share (the "Preferred Shares"), at a price
of $150.00 per one one-thousandth (1/1,000th) of a Preferred Share, subject to
certain anti-dilution adjustments (the "Purchase Price"). Until the earlier to
occur of (i) ten (10) days following a public announcement that a person or
group of affiliated or associated persons has acquired, or obtained the right to
acquire, beneficial ownership of 10% or more of the Common Shares (an "Acquiring
Person") or (ii) the occurrence of the tenth business day (or such later date as
may be determined by action of the Board of Directors prior to such time as any
person or group of affiliated persons becomes an Acquiring Person) following the
commencement or announcement of an intention to make a tender offer or exchange
offer the consummation of which would result in the beneficial ownership by a
person or group of 10% or more of the Common Shares (the earlier of (i) and (ii)
being called the "Distribution Date"), the Rights will be evidenced, with
respect to any of the Common Share certificates outstanding as of the Record
Date, by such Common Share certificate. No person would become an Acquiring
Person solely as the result of any one or more of the following: (i) an
acquisition of Common Shares by the Company which, by reducing the number of
shares outstanding, increases the proportionate number of shares beneficially
owned by such Person to 10% or more of the Common Shares of the Company then
outstanding; (ii) the holding or acquisition by NationsRent, Inc.
("NationsRent") (or any officer, director, Affiliate or Associate of
NationsRent) of Beneficial Ownership of Common Shares of the Company pursuant to
the grant by the Company to NationsRent of the Stock Option Agreement (as
defined in the Agreement and Plan of Merger, dated as of January 20, 1999 (the
"Merger Agreement"), between the Company and NationsRent) or the issuance of
Common Shares of the Company to NationsRent under the Stock Option Agreement;
(iii) the acquisition by any Person of Beneficial Ownership of Common Shares of
the Company issued or to be issued pursuant to Merger Agreement or (iv) the
acquisition by any director or officer of NationsRent or any Person who may be
deemed an Affiliate or an Associate of NationsRent of Beneficial Ownership of
Common Shares of the Company issued or the issuance of Common Shares of the
Company pursuant to NationsRent Options (as defined in the Rights Plan) under
the terms of the Merger Agreement until, in the case of each of clauses (i)
through (iv), such time after the date hereof as any of such Persons shall
become the Beneficial Owner (other than pursuant to a dividend or distribution
paid or made by the Company on the outstanding Common Shares of the Company or
pursuant to a split or subdivision of the outstanding Common Shares) of any
additional Common Shares (other than any such additional Common Shares acquired
in a transaction which is the subject of any of the exceptions described in the
foregoing clauses (ii) through (iv)) and shall thereby become the Beneficial
Owner of 10% or more of the Common Shares of the Company then outstanding (other
than as a consequence of clause (i)). The
<PAGE>
 
Rights will be transferred with and only with the Common Shares until the
Distribution Date or earlier redemption or expiration of the Rights. As soon as
practicable following the Distribution Date, separate certificates evidencing
the Rights ("Right Certificates") will be mailed to holders of record of the
Common Shares as of the close of business on the Distribution Date and such
separate Right Certificates alone will evidence the Rights. The Rights will at
no time have any voting rights. The Board of Directors of the Company has
determined to delay the distribution of the Rights until the earlier of the date
on which an Acquiring Person becomes such and such date as may be determined by
action of the Board of Directors of the Company prior to the time any person or
group becomes an Acquiring Person.

     Each Preferred Share purchasable upon exercise of the Rights will be
entitled, when, as and if declared, to a minimum preferential quarterly dividend
payment of $1.00 per share but will be entitled to an aggregate dividend of
1,000 times the dividend, if any, declared per Common Share. In the event of
liquidation, dissolution or winding up of the Company, the holders of the
Preferred Shares will be entitled to a preferential liquidation payment of
$1,000 per share plus any accrued but unpaid dividends but will be entitled to
an aggregate payment of 1,000 times the payment made per Common Share. Each
Preferred Share will have 1,000 votes and will vote together with the Common
Shares. Finally, in the event of any merger, consolidation or other transaction
in which Common Shares are exchanged, each Preferred Share will be entitled to
receive 1,000 times the amount received per Common Share. Preferred Shares will
not be redeemable. These Rights are protected by customary anti-dilution
provisions. Because of the nature of a Preferred Share's dividend, liquidation
and voting rights, the value of one one-thousandth of a Preferred Share
purchasable upon exercise of each Right should approximate the value of one
Common Share.

     In the event that a Person becomes an Acquiring Person or if the Company
were the surviving corporation in a merger with an Acquiring Person or any
affiliate or associate of an Acquiring Person and the Common Shares were not
changed or exchanged, each holder of a Right, other than Rights that are or were
acquired or beneficially owned by the Acquiring Person (which Rights will
thereafter be void), will thereafter have the right to receive upon exercise
that number of Common Shares having a market value of two times the then current
Purchase Price of one Right. In the event that, after a person has become an
Acquiring Person, the Company were acquired in a merger or other business
combination transaction or more than 50% of its assets or earning power were
sold, proper provision shall be made so that each holder of a Right shall
thereafter have the right to receive, upon the exercise thereof at the then
current Purchase Price of the Right, that number of shares of common stock of
the acquiring company which at the time of such transaction would have a market
value of two times the then current Purchase Price of one Right.

     At any time after a Person becomes an Acquiring Person and prior to the
earlier of one of the events described in the last sentence in the previous
paragraph or the acquisition by such Acquiring Person of 50% or more of the then
outstanding Common Shares, the Board of Directors may cause the Company to
exchange the Rights (other than Rights owned by an Acquiring Person which have
become void), in whole or in part, for Common Shares at an exchange rate of that
number of Common Shares having an aggregate value equal to the Spread
<PAGE>
 
(as defined in the Agreement) (with such value being based on the current per
share market price (as determined pursuant to Section 11.4 of the Agreement)) on
the date of the occurrence of a Trigger Event (as defined in the Agreement) per
Right (subject to adjustment).

     The Rights may be redeemed in whole, but not in part, at a price of $.01
per Right (the "Redemption Price") by the Board of Directors at any time prior
to the time that an Acquiring Person has become such. The redemption of the
Rights may be made effective at such time, on such basis and with such
conditions as the Board of Directors in its sole discretion may establish.
Immediately upon any redemption of the Rights, the right to exercise the Rights
will terminate and the only right of the holders of Rights will be to receive
the Redemption Price.

     The Rights will expire on April 16, 2009 or, as required by the Merger
Agreement, on the earlier of (i) the 60th day following termination of the
Merger Agreement or (ii) the 60th day following the date of the closing of any
merger or other acquisition transaction involving the Company pursuant to
certain types of agreements. ChaseMellon Shareholder Services, L.L.C. is the
Rights Agent.

     The Purchase Price payable, and the number of one one-thousandths of a
Preferred Share 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 Shares, (ii) upon the grant to holders of the
Preferred Shares of certain rights or warrants to subscribe for or purchase
Preferred Shares or convertible securities at less than the current market price
of the Preferred Shares or (iii) upon the distribution to holders of the
Preferred Shares of evidences of indebtedness, cash, securities or assets
(excluding regular periodic cash dividends at a rate not in excess of 125% of
the rate of the last regular periodic cash dividend theretofore paid or, in case
regular periodic cash dividends have not theretofore been paid, at a rate not in
excess of 50% of the average net income per share of the Company for the four
quarters ended immediately prior to the payment of such dividend, or dividends
payable in Preferred Shares (which dividends will be subject to the adjustment
described in clause (i) above)) or of subscription rights or warrants (other
than those referred to above).

     Until a Right is exercised, the holder thereof, as such, will have no
rights as a stockholder of the Company beyond those as an existing stockholder,
including, without limitation, the right to vote or to receive dividends.

     Any of the provisions of the Rights Agreement dated as of April 16, 1999
between the Company and the Rights Agent (the "Rights Agreement") may be amended
by the Board of Directors of the Company for so long as the Rights are then
redeemable, and after the Rights are no longer redeemable, the Company may amend
or supplement the Rights Agreement in any manner that does not adversely affect
the interests of the holder of the Rights.

     One Right will be distributed to stockholders of the Company for each
Common Share owned of record by them on April 30, 1999. As long as the Rights
are attached to the Common Shares, the Company will issue one Right with each
new Common Share so that all such shares will have attached Rights. The Company
has agreed that, from and after the Distribution Date,
<PAGE>
 
the Company will reserve 40,000 Preferred Shares initially for issuance upon
exercise of the Rights.

     The Company's Board of Directors adopted the Rights Agreement after
considering (i) the inadequacy of the price offered to stockholders of the
Company in the tender offer commenced by a subsidiary of United Rentals, Inc.,
(ii) the risk that the United Rentals tender offer will not be consummated and
(iii) the Company's plan to complete the merger with NationsRent pursuant to the
Merger Agreement. The rights are designed to assure that all of the Company's
stockholders receive fair and equal treatment in the event of any proposed
takeover of the Company and to guard against partial tender offers, open market
accumulations and other abusive tactics to gain control of the Company without
paying all stockholders a control premium. The Rights will cause substantial
dilution to a person or group that acquires 10% or more of the Company's stock
on terms not approved by the Company's Board of Directors. The Rights should not
interfere with any merger or other business combination approved by the Board of
Directors at any time prior to the first date that a Person or group has become
an Acquiring Person.

     The Rights Agreement specifying the terms of the Rights and the text of the
press release announcing the declaration of the Rights, are incorporated herein
by reference as exhibits to this Current Report. The foregoing description of
the Rights is qualified in its entirety by reference to such exhibits.
<PAGE>
 
Item 7.   Exhibits.

4.        Rights Agreement, dated as of April 16, 1999, between Rental Service
          Corporation and ChaseMellon Shareholder Services, L.L.C. which
          includes the form of Certificate of Designations of the Series A
          Junior Participating Preferred Stock of Rental Service Corporation as
          Exhibit A, the form of Right Certificate as Exhibit B and the Summary
          of Rights to Purchase Preferred Shares as Exhibit C.


<PAGE>
 
                                   SIGNATURE

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

Dated:  April 16, 1999

                                       RENTAL SERVICE CORPORATION

                                       By: /s/ Robert M. Wilson
                                           --------------------------------
                                           Name:  Robert M. Wilson
                                           Title: Chief Financial Officer
                                                  and Secretary

<PAGE>
 
                                 EXHIBIT INDEX

4.   Rights Agreement, dated as of April 16, 1999, between Rental Service
     Corporation and ChaseMellon Shareholder Services, L.L.C. which includes the
     form of Certificate of Designations of the Series A Junior Participating
     Preferred Stock of Rental Service Corporation as Exhibit A, the form of
     Right Certificate as Exhibit B and the Summary of Rights to Purchase
     Preferred Shares as Exhibit C.



<PAGE>
 
================================================================================

                          RENTAL SERVICE CORPORATION

                                      and

                   CHASEMELLON SHAREHOLDER SERVICES, L.L.C.

                                as Rights Agent

                               Rights Agreement

                          Dated as of April 16, 1999


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

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

          Rights Agreement, dated as of April 16, 1999, between Rental Service
Corporation, a Delaware corporation (the "Company"), and ChaseMellon Shareholder
Services, L.L.C., a New Jersey limited liability company, as Rights Agent (the
"Rights Agent").

                                   RECITALS
                                   --------

          WHEREAS, on January 20, 1999, the Company entered into an Agreement
and Plan of Merger (the "Merger Agreement") with NationsRent, Inc., a Delaware
corporation ("NationsRent"), pursuant to which NationsRent shall be merged with
and into the Company (the "Merger") with the Company as the surviving
corporation (sometimes hereinafter referred to as the "Surviving Corporation"),
and the Company also granted NationsRent an option to purchase certain Common
Shares of the Company pursuant to that certain Stock Option Agreement (the
"Stock Option Agreement") dated as of January 20, 1999.

          WHEREAS, on April 15, 1999, the Board of Directors of the Company
adopted this Agreement, and has authorized and declared a dividend of one
preferred share purchase right (a "Right") for each Common Share (as defined in
Section 1.6) of the Company outstanding at the Close of Business on April 30,
1999 (the "Record Date") and has authorized and directed the issuance of one
Right (subject to adjustment as provided herein) with respect to each Common
Share that shall become outstanding between the Record Date and the earliest of
the Distribution Date and the Expiration Date (as such terms are defined in
Sections 3.1 and 7.1), each Right initially representing the right to purchase
one one-thousandth (subject to adjustment) of a share of Series A Junior
Participating Preferred Stock (the "Preferred Shares") of the Company having the
rights, powers and preferences set forth in the form of Certificate of
Designation attached hereto as Exhibit A, upon the terms and subject to the
conditions hereinafter set forth provided, however, that Rights may be issued
with respect to Common Shares that shall become outstanding after the
Distribution Date and prior to the Expiration Date in accordance with Section
22.

          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:

               1.1.  "Acquiring Person" shall mean any Person (as such term is
hereinafter defined) who or which shall be the Beneficial Owner (as such term is
hereinafter defined) of 10% or more of the Common Shares of the Company then
outstanding but shall not include an Exempt Person (as such term is hereinafter
defined). Notwithstanding the foregoing, no Person who is or shall become the
Beneficial Owner of 10% or more of the Common Shares of the Company then
outstanding shall be an "Acquiring Person" solely as the result of any one or
more of the following: (i) an acquisition of Common Shares by the Company which,
by reducing the number of shares outstanding, increases the proportionate number
of shares beneficially owned by such Person to 10% or more of the Common Shares
of the Company then outstanding; (ii) the holding or acquisition by NationsRent
(or any officer, director, Affiliate or Associate of NationsRent) of Beneficial
Ownership of Common Shares of the Company pursuant to the grant by the Company
to NationsRent of the Stock Option Agreement or the issuance of Common Shares of
the Company to NationsRent under the Stock Option Agreement; (iii) the
acquisition by any Person of Beneficial Ownership of Common Shares of the
Company issued or to be issued pursuant to Merger Agreement or (iv) the
acquisition by any director or officer of NationsRent or any Person who may be
deemed an Affiliate or an Associate of NationsRent of Beneficial Ownership of
Common Shares of the Company issued or the issuance of Common Shares of the
Company pursuant to NationsRent Options (as defined in Section 1.8 hereof) under
the terms of the Merger Agreement until, in the case of each of clauses (i)
through (iv), such time after the date hereof as any of such Persons shall
become the Beneficial Owner (other than pursuant to a dividend or distribution
paid or made by the Company on the outstanding Common Shares of the Company or
pursuant to a split or subdivision of the outstanding Common Shares) of any
additional Common Shares (other than any such additional Common Shares acquired
in a transaction which is the subject of any of the exceptions described in the
foregoing clauses (ii) through (iv)) and shall thereby become the Beneficial
Owner of 10% or more of the Common Shares of the Company then outstanding (other
than as a consequence of clause (i)). 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 Section 1.1, has become such inadvertently (including,
without limitation, because (A) such Person was unaware that it beneficially
owned a percentage of Common Stock that would otherwise cause such Person to be
an "Acquiring Person" or (B) such Person was aware of the extent of its
Beneficial Ownership of Common Stock but had no actual knowledge of the
consequences of such Beneficial Ownership under this Agreement), and without any
intention of changing or influencing control of the Company, and such Person
promptly enters into an irrevocable commitment promptly to divest, and
thereafter promptly divests (without exercising or retaining any power,
including voting, with respect to such shares, sufficient Common Shares (or
securities convertible into, exchangeable into or exercisable for Common Shares)
so that such Person would no longer be an Acquiring Person, as defined pursuant
to the foregoing provisions of this Section 1.1, then such Person shall not be
deemed to be or have become an "Acquiring Person" at any time for any purposes
of this Agreement.
<PAGE>
 

For all purposes of this Agreement, any calculation of the number of Common
Shares outstanding at any particular time, including for purposes of determining
the particular percentage of such outstanding Common Shares 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 Securities

                                       2
<PAGE>
 
Exchange Act of 1934, as amended (the "Exchange Act"), as in effect on the date
of this Agreement.

               1.2.  "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 in effect on the date of this Agreement.

               1.3.  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 beneficially owns, directly or indirectly (as determined pursuant to
Rule 13d-3 of the General Rules and Regulations under the Exchange Act as in
effect on the date of this Agreement);

               (ii)  which such Person or any of such Person's Affiliates or
Associates, directly or indirectly, has (A) the right to acquire (whether such
right is exercisable immediately, or only after the passage of time, compliance
with regulatory requirements, fulfillment of a condition or otherwise) pursuant
to any agreement, arrangement or understanding, whether or not in writing (other
than customary agreements with and between underwriters and selling group
members with respect to a bona fide public offering of securities), or upon the
exercise of conversion rights, exchange rights, rights, warrants or options, or
otherwise; provided, however, that a Person shall not be deemed the Beneficial
Owner of, or to beneficially own, (w) securities tendered pursuant to a tender
or exchange offer made by or on behalf of such Person or any of such Person's
Affiliates or Associates until such tendered securities are accepted for
purchase or exchange, (x) securities which such Person has a right to acquire
upon the exercise of Rights at any time prior to the time that any Person
becomes an Acquiring Person, (y) securities issuable upon the exercise of Rights
from and after the time that any Person becomes an Acquiring Person if such
Rights were acquired by such Person or any of such Person's Affiliates or
Associates prior to the Distribution Date or pursuant to Section 3.1 or Section
22 ("Original Rights") or pursuant to Section 11.9 or Section 11.15 with respect
to an adjustment to Original Rights or (z) securities which such Person or any
of such Person's Affiliates or Associates may acquire, does or do acquire or may
be deemed to have the right to acquire, pursuant to any merger or other
acquisition agreement between the Company and such Person (or one or more of his
Affiliates or Associates) if such agreement has been approved by the Board of
Directors of the Company prior to such Person's becoming an Acquiring Person; or
(B) the right to vote 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
clause (B) if the agreement, arrangement or understanding to vote such security
(1) arises solely from a revocable proxy or consent given to such Person in
response to a public proxy or consent solicitation made pursuant to, and in
accordance with, the applicable rules and regulations of the Exchange Act and
(2) is not also then reportable on Schedule 13D under the Exchange Act (or any
comparable or successor report); or


                                       3
<PAGE>
 
               (iii)  which are beneficially owned, directly or indirectly, by
any other Person (or any Affiliate or Associate thereof) and with respect to
which such Person or any of such Person's Affiliates or Associates has any
agreement, arrangement or understanding (other than customary agreements with
and between underwriters and selling group members with respect to a bona fide
public offering of securities), whether or not in writing, for the purpose of
acquiring, holding, voting (except pursuant to a revocable proxy or consent as
described in the proviso to Section 1.3(ii)(B)) or disposing of any securities
of the Company; provided, however, that no Person who is an officer, director or
employee of an Exempt Person shall be deemed, solely by reason of such Person's
status or authority as such, to be the "Beneficial Owner" of, to have
"Beneficial Ownership" of or to "beneficially own" any securities that are
"beneficially owned" (as defined in this Section 1.3), including, without
limitation, in a fiduciary capacity, by an Exempt Person or by any other such
officer, director or employee of an Exempt Person.

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

               1.5.   "Close of Business" on any given date shall mean 5:00
p.m., New York time, on such date; provided, however, that if such date is not a
Business Day it shall mean 5:00 p.m., New York time, on the next succeeding
Business Day.

               1.6.   "Common Shares" when used with reference to the Company
shall mean the shares of common stock, par value $.01 per share, of the Company.
"Common Shares" when used with reference to any Person other than the Company
shall mean the capital stock with the greatest voting power, or the equity
securities or other equity interest having power to control or direct the
management, of such other Person or, if such Person is a Subsidiary (as such
term is hereinafter defined) of another Person, the Person or Persons which
ultimately control such first-mentioned Person, and which has issued and
outstanding such capital stock, equity securities or equity interest.

               1.7.   "Exempt Person" shall mean the Company, any Subsidiary of
the Company, in each case including, without limitation, in its fiduciary
capacity, or any employee benefit plan of the Company or of any Subsidiary of
the Company or any entity or trustee holding shares of capital stock of the
Company for or pursuant to the terms of any such plan, or for the purpose of
funding other employee benefits for employees of the Company or any Subsidiary
of the Company.

               1.8.   "NationsRent Options" shall mean all options to purchase
NationsRent Common Shares (as defined in the Merger Agreement), whether vested
or unvested, that are converted into options to purchase Common Shares of the
Company in accordance with the Merger Agreement.

               1.9.   "Person" shall mean any individual, partnership, joint
venture, limited liability company, firm, corporation, unincorporated
association, trust or other entity, and shall include any successor (by merger
or otherwise) of such entity.

               1.10.  "Shares Acquisition Date" shall mean the first date of
public announcement (which, for purposes of this definition, shall include,
without limitation, the filing of a report pursuant to Section 13(d) of the
Exchange Act or pursuant to a comparable successor

                                       4
<PAGE>
 
statute) by the Company or an Acquiring Person that an Acquiring Person has
become such or that discloses information which reveals the existence of an
Acquiring Person or such earlier date as a majority of the Board of Directors
shall become aware of the existence of an Acquiring Person.

               1.11.  "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, of record or beneficially, directly or
indirectly, by such Person.

               1.12.  A "Trigger Event" shall be deemed to have occurred upon
any Person becoming an Acquiring Person.

               1.13.  The following terms shall have the meanings defined for
such terms in the Sections set forth below:

                       Term                            Section
                       ----                            -------

          Adjustment Shares                            11.1.2
          common stock equivalent                      11.1.3
          Company                                      Recitals
          current per share market price               11.4
          Current Value                                11.1.3
          Distribution Date                            3.1
          equivalent preferred stock                   11.2
          Exchange Act                                 1.1
          Exchange Consideration                       27
          Existing Holder                              1.1
          Expiration Date                              7.1
          Final Expiration Date                        7.1
          Nasdaq                                       9
          Original Rights                              1.3
          Preferred Shares                             Recitals
          Principal Party                              13.2
          Purchase Price                               4
          Record Date                                  Recitals
          Redemption Date                              7.1
          Redemption Price                             23.1
          Right                                        Recitals
          Right Certificate                            3.1
          Rights Agent                                 Recitals
          Security                                     11.4
          Spread                                       11.1.3
          Substitution Period                          11.1.3

                                       5
<PAGE>
 
          Summary of Rights                            3.2
          Trading Day                                  11.4

          Section 2.  Appointment of Rights Agent.  The Company hereby appoints
the Rights Agent to act as agent for the Company 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. In the event the Company appoints one or more co-Rights
Agents, the respective duties of the Rights Agent and any co-Rights Agent shall
be as the Company shall determine; provided, however, no such appointment or
allocation of duties shall change or increase the Rights Agent's duties,
liabilities or obligations. The Rights Agent shall have no duty to supervise,
and in no event be liable for the acts or omissions of any, such co-Rights
Agent. Contemporaneously with such appointment, if any, the Company shall notify
the Rights Agent thereof.

          Section 3.  Issuance of Right Certificates.

               3.1  Rights Evidenced by Share Certificates.  Until the earlier
of (i) the tenth day after the Shares Acquisition Date or (ii) the occurrence of
the tenth Business Day after the date of the commencement of, or first public
announcement of the intent of any Person (other than an Exempt Person) to
commence, a tender or exchange offer the consummation of which would result in
any Person (other than an Exempt Person) becoming the Beneficial Owner of Common
Shares aggregating 10% or more of the then outstanding Common Shares of the
Company (the earlier of (i) and (ii) being herein referred to as the
"Distribution Date"), (x) the Rights (unless earlier expired, redeemed or
terminated) will be evidenced (subject to the provisions of Section 3.2) by the
certificates for Common Shares registered in the names of the holders thereof
(which certificates for Common Shares shall also be deemed to be Right
Certificates) and not by separate certificates, and (y) the Rights (and the
right to receive certificates therefor) will be transferable only in connection
with the transfer of the underlying Common Shares. The preceding sentence
notwithstanding, prior to the occurrence of a Distribution Date specified as a
result of an event described in clause (ii) (or such later Distribution Date as
the Board of Directors of the Company may select pursuant to this sentence), the
Board of Directors may postpone, one or more times, the Distribution Date which
would occur as a result of an event described in clause (ii) beyond the date set
forth in such clause (ii). Nothing herein shall permit such a postponement of a
Distribution Date after a Person becomes an Acquiring Person. Upon the
occurrence of a Distribution Date, the Company shall promptly notify the Rights
Agent and request a stockholder list from the Company's transfer agent. As soon
as practicable after the Rights Agent receives such notice and stockholder list,
the Company will prepare and execute, the Rights Agent will countersign and the
Company (or, if requested, the Rights Agent) will send, by first-class, postage-
prepaid mail, to each record holder of Common Shares as of the Close of Business
on the Distribution Date (other than any Acquiring Person or any Associate or
Affiliate of an Acquiring Person), at the address of such holder shown on the

                                       6
<PAGE>
 
records of the Company, one or more certificates for Rights, in substantially
the form of Exhibit B hereto (a "Right Certificate"), evidencing one Right
(subject to adjustment as provided herein) for each Common Share so held. As of
the Distribution Date, the Rights will be evidenced solely by such Right
Certificates.

               3.2.  Summary of Rights.  On the Record Date or as soon as
practicable thereafter, the Company will send or cause to be sent a copy of a
Summary of Rights to Purchase Preferred Shares, in substantially the form
attached hereto as Exhibit C (the "Summary of Rights"), by first-class, postage-
prepaid mail, to each record holder of Common Shares as of the Close of Business
on the Record Date at the address of such holder shown on the records of the
Company. With respect to certificates for Common Shares outstanding as of the
Close of Business on the Record Date, until the Distribution Date (or the
earlier Expiration Date), the Rights will be evidenced by such certificates for
Common Shares registered in the names of the holders thereof together with a
copy of the Summary of Rights and the registered holders of the Common Shares
shall also be registered holders of the associated Rights. Until the
Distribution Date (or the earlier Expiration Date), the surrender for transfer
of any certificate for Common Shares outstanding at the Close of Business on the
Record Date, with or without a copy of the Summary of Rights, shall also
constitute the transfer of the Rights associated with the Common Shares
represented thereby.

               3.3.  New Certificates After Record Date.  Certificates for
Common Shares which become outstanding (whether upon issuance out of authorized
but unissued Common Shares, disposition out of treasury or transfer or exchange
of outstanding Common Shares) after the Record Date but prior to the earliest of
the Distribution Date or the Expiration Date, shall have impressed, printed,
stamped, written or otherwise affixed onto them the following legend:

     This certificate also evidences and entitles the holder hereof to certain
     rights as set forth in an Agreement between Rental Service Corporation (the
     "Company") and ChaseMellon Shareholder Services, L.L.C., as Rights Agent,
     dated as of April 16, 1999, as the same may be amended from time to time
     (the "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 Company. Under certain circumstances, as set forth in the Agreement,
     such Rights will be evidenced by separate certificates and will no longer
     be evidenced by this certificate. The Company will mail to the holder of
     this certificate a copy of the Agreement without charge after receipt of a
     written request therefor. As described in the Agreement, Rights which are
     owned by, transferred to or have been owned by Acquiring Persons or
     Associates or Affiliates thereof (as defined in the Agreement) shall become
     null and void and will no longer be transferable.

          With respect to such certificates containing the foregoing legend,
until the Distribution Date (or the earlier Expiration Date), the Rights
associated with the Common Shares represented by such certificates shall be
evidenced by such certificates alone, and the surrender

                                       7
<PAGE>
 
for transfer of any such certificates, except as otherwise provided herein,
shall also constitute the transfer of the Rights associated with the Common
Shares represented thereby. In the event that the Company purchases or acquires
any Common Shares after the Record Date but prior to the Distribution Date, any
Rights associated with such Common Shares shall be deemed canceled and retired
so that the Company shall not be entitled to exercise any Rights associated with
the Common Shares which are no longer outstanding.

          Notwithstanding this Section 3.3, the omission of a legend shall not
affect the enforceability of any part of this Agreement or the rights of any
holder of the Rights.

          Section 4.  Form of Right Certificates.  The Right Certificates (and
the forms of election to purchase shares, certification and assignment to be
printed on the reverse thereof) shall be substantially the same as Exhibit B
hereto and may have such marks of identification or designation and such
legends, summaries or endorsements printed thereon as the Company may deem
appropriate (which do not affect the duties or responsibilities of the Rights
Agent) 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 rule or regulation
made pursuant thereto or with any rule or regulation of any stock exchange or
trading system on which the Rights may from time to time be listed or quoted, or
to conform to usage. Subject to the terms and conditions hereof, the Right
Certificates, whenever issued, shall be dated as of the Record Date, and shall
show the date of countersignature by the Rights Agent, and on their face shall
entitle the holders thereof to purchase such number of one one-thousandths of a
Preferred Share as shall be set forth therein at the price per one one-
thousandth of a Preferred Share set forth therein (the "Purchase Price"), but
the number of such one one-thousandths of a Preferred Share and the Purchase
Price shall be subject to adjustment as provided herein.

          Section 5.  Countersignature and Registration. The Right Certificates
shall be executed on behalf of the Company by its Chairman of the Board of
Directors, the Chief Executive Officer, President or any Vice President, either
manually or by facsimile signature, and shall have affixed thereto the Company's
seal or a facsimile thereof which shall be attested by the Secretary or any
Assistant Secretary of the Company, either manually or by facsimile signature.
The Right Certificates shall be countersigned, either manually or by facsimile
signature, by an authorized signatory of the Rights Agent, but it shall not be
necessary for the same signatory to countersign all of the Right Certificates
hereunder. No Right Certificate shall be valid for any purpose unless so
countersigned. In case any officer of the Company who shall have signed any of
the Right Certificates shall cease to be such officer of the Company before
countersignature by the Rights Agent and issuance and delivery by the Company,
such Right 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 Right Certificates had not ceased to be such officer
of the Company; and any Right Certificate may be signed on behalf of the Company
by any Person who, at the actual date of the execution of such Right
Certificate, shall be a proper officer of the Company to sign such Right
Certificate, although at the date of the execution of this Agreement any such
Person was not such an officer.


                                       8
<PAGE>
 
          Following the Distribution Date and receipt by the Rights Agent of the
notice and list of record holders of Rights referred to in Section 3.1 hereof,
the Rights Agent will keep or cause to be kept, at its office designated
pursuant to Section 25 hereof, books for registration and transfer of the Right
Certificates issued hereunder. Such books shall show the names and addresses of
the respective holders of the Right Certificates, the number of Rights evidenced
on its face by each of the Right Certificates, the certificate number of each of
the Right Certificates and the date of each of the Right Certificates.

          Section 6.  Transfer, Split Up, Combination and Exchange of Right
Certificates; Mutilated, Destroyed, Lost or Stolen Right Certificates. Subject
to the provisions of Section 7.5, Section 11.1.2 and Section 14, at any time
after the Close of Business on the Distribution Date, and at or prior to the
Close of Business on the Expiration Date, any Right Certificate or Right
Certificates (other than Right Certificates representing Rights that have become
void pursuant to Section 11.1.2 or that have been exchanged pursuant to Section
27) may be transferred, split up or combined or exchanged for another Right
Certificate or Right Certificates, entitling the registered holder to purchase a
like number of one one-thousandths of a Preferred Share as the Right Certificate
or Right Certificates surrendered then entitled such holder to purchase. Any
registered holder desiring to transfer, split up or combine or exchange any
Right Certificate shall make such request in writing delivered to the Rights
Agent, and shall surrender, together with any required form of assignment and
certificate duly completed, the Right Certificate or Right Certificates to be
transferred, split up or 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 Right Certificate or Right Certificates until the registered holder
shall have completed and signed the certificate contained in the form of
assignment on the reverse side of such Right Certificate or Right Certificates
and shall have provided such additional evidence of the identity of the
Beneficial Owner (or former Beneficial Owner) or Affiliates or Associates
thereof as the Company or the Rights Agent shall reasonably request. Thereupon
the Rights Agent shall countersign and deliver to the person entitled thereto a
Right Certificate or Right Certificates, as the case may be, as so requested.
The Company may require payment from the holders of Right Certificates of a sum
sufficient to cover any tax or governmental charge that may be imposed in
connection with any transfer, split up or combination or exchange of such Right
Certificates. The Rights Agent may delay the processing of such transaction
until it receives evidence that applicable taxes and governmental charges have
been paid.

          Subject to the provisions of Section 11.1.2 , at any time after the
Distribution Date and prior to the Expiration Date, upon receipt by the Company
and the Rights Agent of evidence reasonably satisfactory to them of the loss,
theft, destruction or mutilation of a Right 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 Right Certificate if mutilated, the Company will
make and deliver a new Right Certificate of like tenor to the Rights Agent for
countersignature and delivery to the registered owner in lieu of the Right
Certificate so lost, stolen, destroyed or mutilated.


                                       9
<PAGE>
 
          Section 7.  Exercise of Rights; Purchase Price; Expiration Date of
Rights.

               7.1.  Exercise of Rights.  Subject to Section 11.1.2 and except
as otherwise provided herein, the registered holder of any Right Certificate may
exercise the Rights evidenced thereby in whole or in part at any time after the
Distribution Date upon surrender of the Right Certificate, with the form of
election to purchase and certification on the reverse side thereof duly
executed, to the Rights Agent at the office of the Rights Agent designated for
such purpose, together with payment of the aggregate Purchase Price for the
total number of one one-thousandths of a Preferred Share (or other securities,
cash or other assets) as to which the Rights are exercised, at or prior to the
time (the "Expiration Date") that is the earliest of (i) the Close of Business
on April 16, 2009 (the "Final Expiration Date"), (ii) the time at which the
Rights are redeemed as provided in Section 23 (the "Redemption Date"), (iii) the
60th day following the closing of any merger or other acquisition transaction
involving the Company pursuant to an agreement of the type described in Sections
1.3(ii)(A)(z) and 13.3, at which time the Rights are deemed terminated, unless
the New Directors (as defined in the Merger Agreement) shall elect, by
affirmative vote of not less than two-thirds of the entire board of directors of
the Surviving Corporation, to have such Rights not be terminated and to continue
in full force and effect, (iv) the time at which the Rights are exchanged as
provided in Section 27 and (v) the 60th day following the date of the
termination of the Merger Agreement.

               7.2.  Purchase.  The Purchase Price for each one one-thousandth
of a Preferred Share pursuant to the exercise of a Right shall be initially
$150.00, shall be subject to adjustment from time to time as provided in
Sections 11, 13 and 26 and shall be payable in lawful money of the United States
of America in accordance with Section 7.3.

               7.3.  Payment Procedures.  Upon receipt of a Right Certificate
representing exercisable Rights, with the form of election to purchase and
certification duly executed, accompanied by payment of the aggregate Purchase
Price for the total number of one one-thousandths of a Preferred Share to be
purchased and an amount equal to any applicable transfer tax or governmental
charge required to be paid by the holder of such Right Certificate in accordance
with Section 9, in cash or by certified or cashier's check or money order
payable to the order of the Company, the Rights Agent shall thereupon promptly
(i)(A) requisition from any transfer agent of the Preferred Shares (or make
available, if the Rights Agent is the transfer agent) certificates for the
number of Preferred Shares 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 Preferred Shares
issuable upon exercise of the Rights hereunder with a depository agent,
requisition from the depositary agent depositary receipts representing interests
in such number of one one-thousandths of a Preferred Share as are to be
purchased (in which case certificates for the Preferred Shares represented by
such receipts shall be deposited by the transfer agent with the depositary
agent) and the Company hereby directs the depositary agent to comply with all
such requests, (ii) when appropriate, requisition from the Company the amount of
cash to be paid in lieu of the issuance of fractional shares in accordance with
Section 14 or otherwise in accordance with Section 11.1.3, (iii) promptly after

                                      10
<PAGE>
 
receipt of such certificates or depositary receipts, cause the same to be
delivered to or upon the order of the registered holder of such Right
Certificate, registered in such name or names as may be designated by such
holder and (iv) when appropriate, after receipt, promptly deliver such cash to
or upon the order of the registered holder of such Right Certificate. In the
event that the Company is obligated to issue other securities of the Company,
pay cash and/or distribute other property pursuant to Section 11.1.3, the
Company will make all arrangements necessary so that such other securities, cash
and/or other property are available for distribution by the Rights Agent, if and
when necessary to comply with this Agreement.

               7.4.  Partial Exercise.  In case the registered holder of any
Right Certificate shall exercise less than all the Rights evidenced thereby, a
new Right Certificate evidencing Rights equivalent to the Rights remaining
unexercised shall be issued by the Rights Agent and delivered to the registered
holder of such Right Certificate or to his duly authorized assigns, subject to
the provisions of Sections 6 and 14 hereof.

               7.5.  Full Information Concerning Ownership.  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 of Rights upon the occurrence of any purported exercise as set forth in
this Section 7 unless the certificate contained in the form of election to
purchase set forth on the reverse side of the Right Certificate surrendered for
such exercise shall have been duly completed and signed by the registered holder
thereof and the Company shall have been provided with such additional evidence
of the identity of the Beneficial Owner (or former Beneficial Owner) or
Affiliates or Associates thereof as the Company or the Rights Agent shall
reasonably request.

          Section 8.  Cancellation and Destruction of Right Certificates.  All
Right 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 Right
Certificates shall be issued in lieu thereof except as expressly permitted by
any of the 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 Right Certificate purchased or acquired by the Company
otherwise than upon the exercise thereof. The Rights Agent shall deliver all
canceled Right Certificates to the Company, or shall, at the written request of
the Company, destroy such canceled Right Certificates, and in such case shall
deliver a certificate of destruction thereof to the Company.

          Section 9.  Reservation and Availability of Capital Stock.  The
Company covenants and agrees that from and after the Distribution Date it will
cause to be reserved and kept available out of its authorized and unissued
Preferred Shares (and, following the occurrence of a Trigger Event, out of its
authorized and unissued Common Shares or other securities or out of its shares
held in its treasury) the number of Preferred Shares (and, following the
occurrence of a Trigger Event, Common Shares and/or other securities) that will
be sufficient to permit the exercise in full of all outstanding Rights.


                                       11
<PAGE>
 
          So long as the Preferred Shares (and, following the occurrence of a
Trigger Event, Common Shares and/or other securities) issuable upon the exercise
of Rights may be listed on any national securities exchange or traded in the
over-the-counter market and quoted on the National Association of Securities
Dealers, Inc. Automated Quotation System ("Nasdaq") (including the National
Market or Small Cap Market), the Company shall use its best efforts to cause,
from and after such time as the Rights become exercisable, all shares reserved
for such issuance to be listed or admitted to trading on such exchange or quoted
on Nasdaq upon official notice of issuance upon such exercise.

          The Company covenants and agrees that it will take all such action as
may be necessary to ensure that all Preferred Shares (and, following the
occurrence of a Trigger Event, Common Shares 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 nonassessable shares.

          From and after such time as the Rights become exercisable, the Company
shall use its best efforts, if then necessary to permit the issuance of
Preferred Shares upon the exercise of Rights, to register and qualify such
Preferred Shares under the Securities Act and any applicable state securities or
"Blue Sky" laws (to the extent exemptions therefrom are not available), cause
such registration statement and qualifications to become effective as soon as
possible after such filing and keep such registration and qualifications
effective until the earlier of the date as of which the Rights are no longer
exercisable for such securities and the Expiration Date. The Company may
temporarily suspend, for a period of time not to exceed 90 days, the
exercisability of the Rights in order to prepare and file a registration
statement under the Securities Act and permit it to become effective. Upon 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.
Notwithstanding any provision of this Agreement to the contrary, the Rights
shall not be exercisable in any jurisdiction unless the requisite qualification
in such jurisdiction shall have been obtained and until a registration statement
under the Securities Act (if required) shall have been declared effective.

          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 Right Certificates or of
any Preferred Shares (or Common Shares 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 which may be payable in respect of any transfer or delivery
of Right Certificates to a person other than, or the issuance or delivery of
certificates for the Preferred Shares (or Common Shares and/or other securities,
as the case may be) in a name other than that of, the registered holder of the
Right Certificate evidencing Rights surrendered for exercise or to issue or
deliver any certificates for Preferred Shares (or Common Shares 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 shall have been paid
(any such tax being payable by the


                                      12
<PAGE>
 
holder of such Right Certificate at the time of surrender) or until it has been
established to the Company's satisfaction that no such tax is due.

          Section 10.  Preferred Shares Record Date.  Each person in whose name
any certificate for Preferred Shares (or Common Shares 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 the Preferred Shares (or Common
Shares and/or other securities, as the case may be) represented thereby on, and
such certificate shall be dated, the date upon which the Right Certificate
evidencing such Rights was duly surrendered and payment of the Purchase Price
(and any applicable transfer taxes and other governmental charges) was made;
provided, however, that if the date of such surrender and payment is a date upon
which the Preferred Shares (or Common Shares and/or other securities, as the
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 Preferred Shares (or Common Shares 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 Right Certificate shall not be
entitled to any rights of a holder of Preferred Shares for which the Rights
shall be exercisable, including, without limitation, the right to vote or to
receive dividends or other distributions, 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 of Shares or Number
of Rights.  The Purchase Price, the number of Preferred Shares or other
securities or property purchasable upon exercise of each Right and the number of
Rights outstanding are subject to adjustment from time to time as provided in
this Section 11.

               11.1.  Post-Execution Events.

                      11.1.1.  Corporate Dividends, Reclassifications, Etc.  In
the event the Company shall at any time after the date of this Agreement (A)
declare and pay a dividend on the Preferred Shares payable in Preferred Shares,
(B) subdivide the outstanding Preferred Shares, (C) combine the outstanding
Preferred Shares into a smaller number of Preferred Shares or (D) issue any
shares of its capital stock in a reclassification of the Preferred Shares
(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 11.1, 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 capital stock issuable on such date, shall be proportionately adjusted so
that the holder of any Right exercised after such time shall be entitled to
receive the aggregate number and kind of shares of capital stock which, if such
Right had been exercised immediately prior to such date and at a time when the
Preferred Shares 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; provided, however, that in no
event shall the consideration to be paid upon the exercise of one Right be less
than the aggregate par value of the shares of capital


                                      13
<PAGE>
 
stock of the Company issuable upon exercise of one Right. If an event occurs
which would require an adjustment under both Section 11.1.1 and Section 11.1.2,
the adjustment provided for in this Section 11.1.1 shall be in addition to, and
shall be made prior to, the adjustment required pursuant to, Section 11.1.2.

                      11.1.2.  Acquiring Person Events; Triggering Events.  
Subject to Sections 23.1 and 27, in the event that a Trigger Event occurs, then,
from and after the first occurrence of such event, each holder of a Right,
except as provided below, shall thereafter have a right to receive, upon
exercise thereof at a price per Right equal to the then current Purchase Price
multiplied by the number of one one-thousandths of a Preferred Share for which a
Right is then exercisable (without giving effect to this Section 11.1.2), in
accordance with the terms of this Agreement and in lieu of Preferred Shares,
such number of Common Shares as shall equal the result obtained by (x)
multiplying the then current Purchase Price by the then number of one one-
thousandths of a Preferred Share for which a Right is then exercisable (without
giving effect to this Section 11.1.2) and (y) dividing that product by 50% of
the current per share market price of the Common Shares (determined pursuant to
Section 11.4) on the first of the date of the occurrence of, or the date of the
first public announcement of, a Trigger Event (the "Adjustment Shares");
provided that the Purchase Price and the number of Adjustment Shares shall
thereafter be subject to further adjustment as appropriate in accordance with
Section 11.6. Notwithstanding the foregoing, upon the occurrence of a Trigger
Event, any Rights that are or were acquired or beneficially owned by (1) any
Acquiring Person or any Associate or Affiliate thereof, (2) a transferee of any
Acquiring Person (or of any such Associate or Affiliate) who becomes a
transferee after the Acquiring Person becomes such, or (3) a transferee of any
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 the Acquiring Person has any
continuing agreement, arrangement or understanding regarding the transferred
Rights or (B) a transfer which the Board of Directors of the Company has
determined is part of a plan, arrangement or understanding which has as a
primary purpose or effect avoidance of this Section 11.1.2, and subsequent
transferees, shall become void without any further action, and any holder
(whether or not such holder is an Acquiring Person or an Associate or Affiliate
of an Acquiring Person) of such Rights shall thereafter have no right to
exercise such Rights under any provision of this Agreement or otherwise. The
Company shall not enter into any transaction of the type described in this
Section 11.1.2 if at the time of such transaction there are any rights,
warrants, instruments or securities outstanding or any arrangements which, as a
result of the consummation of such transaction, would eliminate or substantially
diminish the benefits intended to be afforded by the Rights. From and after the
Trigger Event, no Right Certificate shall be issued pursuant to Section 3 or
Section 6 that represents Rights that are or have become void pursuant to the
provisions of this paragraph, and any Right Certificate delivered to the Rights
Agent that represents Rights that are or have become void pursuant to the
provisions of this paragraph shall be canceled.


                                      14
<PAGE>
 
          The Company shall use all reasonable efforts to ensure that the
provisions of this Section 11.1.2 are complied with, but shall have no liability
to any holder of Right Certificates or other Person as a result of its failure
to make any determinations with respect to any Acquiring Person or its
Affiliates, Associates or transferees hereunder.

          From and after the occurrence of an event specified in Section 13.1,
any Rights that theretofore have not been exercised pursuant to this Section
11.1.2 shall thereafter be exercisable only in accordance with Section 13 and
not pursuant to this Section 11.1.2.

                      11.1.3.  Insufficient Shares.  The Company may at its
option substitute for a Common Share issuable upon the exercise of Rights in
accordance with the foregoing Section 11.1.2 a number of Preferred Shares or
fraction thereof such that the current per share market price of one Preferred
Share multiplied by such number or fraction is equal to the current per share
market price of one Common Share. In the event that upon the occurrence of one
or more of the events listed in Section 11.1.2 above there shall not be
sufficient Common Shares authorized but unissued, or held by the Company as
treasury shares, to permit the exercise in full of the Rights in accordance with
the foregoing Section 11.1.2, the Company shall take all such action as may be
necessary to authorize additional Common Shares for issuance upon exercise of
the Rights, provided, however, that if the Company determines that it is unable
to cause the authorization of a sufficient number of additional Common Shares,
then, in the event the Rights become exercisable, the Company, with respect to
each Right and to the extent necessary and permitted by applicable law and any
agreements or instruments in effect on the date hereof to which it is a party,
shall: (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 result
obtained by multiplying the number of Common Shares in respect of which a Right
is then exercisable by the then current Purchase Price (such excess, the
"Spread") and (B) with respect to each Right (other than Rights which have
become void pursuant to Section 11.1.2), make adequate provision to substitute
for the Adjustment Shares, upon payment of the applicable Purchase Price, (1)
cash, (2) a reduction in the Purchase Price, (3) Preferred Shares or other
equity securities of the Company (including, without limitation, shares, or
fractions of shares, of preferred stock which, by virtue of having dividend,
voting and liquidation rights substantially comparable to those of the Common
Shares, the Board of Directors of the Company has deemed in good faith to have
substantially the same value as Common Shares) (each such share of preferred
stock or fractions of shares of preferred stock constituting a "common stock
equivalent")), (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 of Directors
of the Company based upon the advice of a nationally recognized investment
banking firm selected in good faith by the Board of Directors of the Company;
provided, however, that if the Company shall not have made adequate provision to
deliver value pursuant to clause (B) above within thirty (30) days following the
first occurrence of one of the events listed in Section 11.1.2 above, then the
Company shall be obligated to deliver, to the extent necessary and permitted by
applicable law and any agreements or instruments in effect on the date hereof to
which it is a party, upon the surrender for exercise of a Right and without
requiring payment of the Purchase Price, Common Shares (to the extent


                                      15
<PAGE>
 
available) and then, if necessary, such number or fractions of Preferred Shares
(to the extent available) and then, if necessary, cash, which shares and/or cash
have an aggregate value equal to the Spread. If the Board of Directors of the
Company shall determine in good faith that it is unlikely that sufficient
additional Common Shares could be authorized for issuance upon exercise in full
of the Rights, the thirty (30) day period set forth above may be extended and 
re-extended to the extent necessary, but not more than ninety (90) days
following the first occurrence of one of the events listed in Section 11.1.2
above, in order that the Company may seek stockholder approval for the
authorization of such additional shares (such period as may be extended, the
"Substitution Period"). To the extent that the Company determines that some
action need be taken pursuant to the second and/or third sentences of this
Section 11.1.3, the Company (x) shall provide 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 such first sentence 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 11.1.3, the
value of a Common Share shall be the current per share market price (as
determined pursuant to Section 11.4) on the date of the occurrence of a Trigger
Event and the value of any "common stock equivalent" shall be deemed to have the
same value as the Common Shares on such date. The Board of Directors of the
Company may, but shall not be required to, establish procedures to allocate the
right to receive Common Shares upon the exercise of the Rights among holders of
Rights pursuant to this Section 11.1.3.

               11.2.  Dilutive Rights Offering.  In case the Company shall fix a
record date for the issuance of rights, options or warrants to all holders of
Preferred Shares entitling them (for a period expiring within 45 calendar days
after such record date) to subscribe for or purchase Preferred Shares (or
securities having the same rights, privileges and preferences as the Preferred
Shares ("equivalent preferred stock")) or securities convertible into Preferred
Shares or equivalent preferred stock at a price per Preferred Share or per share
of equivalent preferred stock (or having a conversion or exercise price per
share, if a security convertible into or exercisable for Preferred Shares or
equivalent preferred stock) less than the current per share market price of the
Preferred Shares (as determined pursuant to Section 11.4) 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 Preferred Shares
and shares of equivalent preferred stock outstanding on such record date plus
the number of Preferred Shares and shares of equivalent preferred stock which
the aggregate offering price of the total number of Preferred Shares and/or
shares of equivalent preferred stock to be offered (and/or the aggregate initial
conversion price of the convertible securities so to be offered) would purchase
at such current per share market price and the denominator of which shall be the
number of Preferred Shares and shares of equivalent preferred stock outstanding
on such record date plus the number of additional Preferred Shares and/or shares
of equivalent preferred stock to be offered for subscription or purchase (or
into which the convertible securities so to be offered are initially
convertible); provided, however, that in no


                                      16
<PAGE>
 
event shall the consideration to be paid upon the exercise of one Right be less
than the aggregate par value of the shares of capital stock of the Company
issuable upon exercise of one Right. 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 of
Directors of the Company, whose determination shall be described in a statement
filed with the Rights Agent and shall be binding on the Rights Agent and the
holders of the Rights. Preferred Shares and shares of equivalent preferred stock
owned by or held for the account of the Company or any Subsidiary of the Company
shall not be deemed outstanding for the purpose of any such computation. Such
adjustments 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.

               11.3.  Distributions.  In case the Company shall fix a record
date for the making of a distribution to all holders of the Preferred Shares
(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, securities or assets (other than a regular
periodic cash dividend at a rate not in excess of 125% of the rate of the last
regular periodic cash dividend theretofore paid or, in case regular periodic
cash dividends have not theretofore been paid, at a rate not in excess of 50% of
the average net income per share of the Company for the four quarters ended
immediately prior to the payment of such dividend, or a dividend payable in
Preferred Shares (which dividend, for purposes of this Agreement, shall be
subject to the provisions of Section 11.1.1(A))) or convertible securities, or
subscription rights or warrants (excluding those referred to in Section 11.2),
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 Preferred Shares (as determined pursuant to Section 11.4) on such
record date, less the fair market value (as determined in good faith by the
Board of Directors of the Company, whose determination shall be described in a
statement filed with the Rights Agent) of the portion of the cash, assets,
securities or evidences of indebtedness so to be distributed or of such
subscription rights or warrants applicable to one Preferred Share and the
denominator of which shall be such current per share market price of the
Preferred Shares (as determined pursuant to Section 11.4); provided, however,
that in no event shall the consideration to be paid upon the exercise of one
Right be less than the aggregate par value of the shares of capital stock of the
Company to be issued upon exercise of one Right. Such adjustments 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.

               11.4.  Current Per Share Market Value.

                      11.4.1.  General.  For the purpose of any computation
hereunder, the "current per share market price" of any security (a "Security"
for the purpose of this Section 11.4.1) on any date shall be deemed to be the
average of the daily closing prices per


                                      17
<PAGE>
 
share of such Security for the thirty (30) consecutive Trading Days (as such
term is hereinafter defined) immediately prior to such date; provided, however,
that in the event that the current per share market price of the Security is
determined during any period following the announcement by the issuer of such
Security of (i) a dividend or distribution on such Security payable in shares of
such Security or securities convertible into such shares or (ii) any
subdivision, combination or reclassification of such Security, and prior to the
expiration of thirty (30) Trading Days 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 per share market
price" shall be appropriately adjusted to reflect the current market price per
share equivalent of such Security. 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 Security is 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 Security is listed or admitted to trading or, if the Security is
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 Nasdaq or such other
system then in use, or, if on any such date the Security is 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 Security selected by the
Board of Directors of the Company. If on any such date no such market maker is
making a market in the Security, the fair value of the Security on such date as
determined in good faith by the Board of Directors of the Company shall be used.
The term "Trading Day" shall mean a day on which the principal national
securities exchange on which the Security is listed or admitted to trading is
open for the transaction of business or, if the Security is not listed or
admitted to trading on any national securities exchange, a Business Day. If the
Security is not publicly held or not so listed or traded, or if on any such date
the Security is not so quoted and no such market maker is making a market in the
Security, "current per share market price" shall mean the fair value per share
as determined in good faith by the Board of Directors of the Company or, if at
the time of such determination there is an Acquiring Person, by a nationally
recognized investment banking firm selected by the Board of Directors, which
shall have the duty to make such determination in a reasonable and objective
manner, whose determination shall be described in a statement filed with the
Rights Agent and shall be conclusive for all purposes.

                      11.4.2.  Preferred Shares.  Notwithstanding Section
11.4.1, for the purpose of any computation hereunder, the "current per share
market price" of the Preferred Shares shall be determined in the same manner as
set forth above in Section 11.4.1 (other than the last sentence thereof). If the
current per share market price of the Preferred Shares cannot be determined in
the manner described in Section 11.4.1, the "current per share market price" of
the Preferred Shares 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 Shares
occurring after the date of this Agreement) multiplied by the current per share
market price of the Common Shares (as determined pursuant


                                      18
<PAGE>
 
to Section 11.4.1). If neither the Common Shares nor the Preferred Shares are
publicly held or so listed or traded, or if on any such date neither the Common
Shares nor the Preferred Shares are so quoted and no such market maker is making
a market in either the Common Shares or the Preferred Shares, "current per share
market price" of the Preferred Shares shall mean the fair value per share as
determined in good faith by the Board of Directors of the Company, or, if at the
time of such determination there is an Acquiring Person, by a nationally
recognized investment banking firm selected by the Board of Directors of the
Company, which shall have the duty to make such determination in a reasonable
and objective manner, which determination shall be described in a statement
filed with the Rights Agent and shall be conclusive for all purposes. For
purposes of this Agreement, the "current per share market price" of one one-
thousandth of a Preferred Share shall be equal to the "current per share market
price" of one Preferred Share divided by 1,000.

               11.5.  Insignificant Changes.  No adjustment in the Purchase
Price shall be required unless such adjustment would require an increase or
decrease of at least 1% in the Purchase Price. Any adjustments which by reason
of this Section 11.5 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 one-millionth of
a Preferred Share or the nearest one-thousandth of a Common Share or other share
or security, as the case may be.

               11.6.  Shares Other Than Preferred Shares.  If as a result of an
adjustment made pursuant to Section 11.1, the holder of any Right thereafter
exercised shall become entitled to receive any shares of capital stock of the
Company other than Preferred Shares, thereafter the number of such other shares
so receivable upon exercise of any Right 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 Preferred Shares contained in Sections 11.1,
11.2, 11.3, 11.5, 11.8, 11.9 and 11.13, and the provisions of Sections 7, 9, 10,
13 and 14 with respect to the Preferred Shares shall apply on like terms to any
such other shares.

               11.7.  Rights Issued Prior to Adjustment.  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 Preferred Share purchasable from time to
time hereunder upon exercise of the Rights, all subject to further adjustment as
provided herein.

               11.8.  Effect of Adjustments.  Unless the Company shall have
exercised its election as provided in Section 11.9, upon each adjustment of the
Purchase Price as a result of the calculations made in Sections 11.2 and 11.3,
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 Preferred Share (calculated to the nearest
one-millionth of a Preferred Share) obtained by (i) multiplying (x) the number
of one one-thousandths of a Preferred 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


                                      19
<PAGE>
 
(ii) dividing the product so obtained by the Purchase Price in effect
immediately after such adjustment of the Purchase Price.

               11.9.  Adjustment in Number of Rights.  The Company may elect and
shall provide the Rights Agent with notice of such election on or after the date
of any adjustment of the Purchase Price to adjust the number of Rights, in
substitution for any adjustment in the number of one one-thousandths of a
Preferred Share 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 Preferred Share 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 one-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 Right Certificates have been issued, shall be at least ten (10) days
later than the date of the public announcement. If Right Certificates have been
issued, upon each adjustment of the number of Rights pursuant to this Section
11.9, the Company may, as promptly as practicable, cause to be distributed to
holders of record of Right Certificates on such record date Right Certificates
evidencing, subject to Section 14, 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 Right Certificates held by such holders prior to the
date of adjustment, and upon surrender thereof, if required by the Company, new
Right Certificates evidencing all the Rights to which such holders shall be
entitled after such adjustment. Right 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 Right Certificates on the
record date specified in the public announcement.

               11.10.  Right Certificates Unchanged.  Irrespective of any
adjustment or change in the Purchase Price or the number of one one-thousandths
of a Preferred Share issuable upon the exercise of the Rights, the Right
Certificates theretofore and thereafter issued may continue to express the
Purchase Price per share and the number of one one-thousandths of a Preferred
Share which were expressed in the initial Right Certificates issued hereunder.

               11.11.  Par Value Limitations.  Before taking any action that
would cause an adjustment reducing the Purchase Price below one one-thousandth
of the then par value, if any, of the Preferred Shares or other shares of
capital 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 nonassessable
Preferred Shares or other such shares at such adjusted Purchase Price.

               11.12.  Deferred Issuance.  In any case in which this Section 11
shall


                                      20
<PAGE>
 
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 of that number of Preferred Shares and shares of other capital
stock or securities of the Company, if any, issuable upon such exercise over and
above the Preferred Shares and shares of other capital stock or other
securities, assets or cash 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 upon the occurrence of the event requiring such adjustment.

               11.13.  Reduction in Purchase Price.  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 it in its sole discretion
shall determine to be advisable in order that any consolidation or subdivision
of the Preferred Shares, issuance wholly for cash of any of the Preferred Shares
at less than the current market price, issuance wholly for cash of Preferred
Shares or securities which by their terms are convertible into or exchangeable
for Preferred Shares, dividends on Preferred Shares payable in Preferred Shares
or issuance of rights, options or warrants referred to hereinabove in this
Section 11, hereafter made by the Company to holders of its Preferred Shares
shall not be taxable to such stockholders.

               11.14.  Company Not to Diminish Benefits of Rights.  The Company
covenants and agrees that after the earlier of the Shares Acquisition Date or
Distribution Date it will not, except as permitted by Section 23, Section 26 or
Section 27, 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
substantially diminish or otherwise eliminate the benefits intended to be
afforded by the Rights.

               11.15.  Adjustment of Rights Associated with Common Shares.
Notwithstanding anything contained in this Agreement to the contrary, in the
event that the Company shall at any time after the date hereof and prior to the
Distribution Date (i) declare or pay any dividend on the outstanding Common
Shares payable in Common Shares, (ii) effect a subdivision or consolidation of
the outstanding Common Shares (by reclassification or otherwise than by the
payment of dividends payable in Common Shares), or (iii) combine the outstanding
Common Shares into a greater or lesser number of Common Shares, then in any such
case, the number of Rights associated with each Common Share then outstanding,
or issued or delivered thereafter but prior to the Distribution Date or in
accordance with Section 22 shall be proportionately adjusted so that the number
of Rights thereafter associated with each Common Share following any such event
shall equal the result obtained by multiplying the number of Rights associated
with each Common Share immediately prior to such event by a fraction, the
numerator of which shall be the total number of Common Shares outstanding
immediately prior to the occurrence of the event and the denominator of which
shall be the total number of Common Shares outstanding immediately following the
occurrence of such event. The adjustments provided for in this Section 11.15
shall be made successively whenever such a


                                      21
<PAGE>
 
dividend is declared or paid or such a subdivision, combination or consolidation
is effected.

          Section 12.  Certificate of Adjusted Purchase Price or Number of
Shares.  Whenever an adjustment is made as provided in Sections 11 or 13, the
Company shall (a) promptly prepare a certificate setting forth such adjustment,
and a brief, reasonably detailed statement of the facts, computations and
methodology accounting for such adjustment, (b) promptly file with the Rights
Agent and with each transfer agent for the Common Shares or the Preferred Shares
a copy of such certificate and (c) mail a brief summary thereof to each holder
of a Right Certificate in accordance with Section 25. The Rights Agent shall be
fully protected in relying on any such certificate and on any adjustment therein
contained and shall have no duty with respect to and shall not be deemed to have
knowledge of any such adjustment unless and until it shall have received such
certificate.

          Section 13.  Consolidation, Merger or Sale or Transfer of Assets or
Earning Power.

               13.1.  Certain Transactions.  In the event that, from and after
the first occurrence of a Trigger Event, directly or indirectly, (A) the Company
shall consolidate with, or merge with and into, any other Person and the Company
shall not be the continuing or surviving corporation, (B) any Person shall
consolidate with the Company, or merge with and into the Company and the Company
shall be the continuing or surviving corporation of such merger and, in
connection with such merger, all or part of the Common Shares shall be changed
into or exchanged for stock or other securities of the Company or any other
Person or cash or any other property, or (C) the Company shall sell, exchange,
mortgage or otherwise transfer (or one or more of its Subsidiaries shall sell,
exchange, mortgage or otherwise transfer), in one or more transactions, assets
or earning power aggregating 50% or more 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 or one or more wholly-owned Subsidiaries of the Company
in one or more transactions each of which complies with Section 11.14), then,
and in each such case, proper provision shall be made so that (i) each holder of
a Right (other than Rights which have become void pursuant to Section 11.1.2)
shall thereafter have the right to receive, upon the exercise thereof at a price
per Right equal to the then current Purchase Price multiplied by the number of
one one-thousandths of a Preferred Share for which a Right was exercisable
immediately prior to the first occurrence of a Trigger Event (as subsequently
adjusted pursuant to Sections 11.1.1, 11.2, 11.3, 11.8, 11.9 and 11.12), in
accordance with the terms of this Agreement and in lieu of Preferred Shares or
Common Shares, such number of validly authorized and issued, fully paid, non-
assessable and freely tradable Common Shares of the Principal Party (as such
term is hereinafter defined) not subject to any liens, encumbrances, rights of
first refusal or other adverse claims, as shall be equal to the result obtained
by (x) multiplying the then current Purchase Price by the number of one one-
thousandths of a Preferred Share for which a Right was exercisable immediately
prior to the first occurrence of a Trigger Event (as subsequently adjusted
pursuant to Sections 11.1.1, 11.2, 11.3, 11.8, 11.9 and 11.12) and (y) dividing
that product by 50% of the then current per share market price of the Common
Shares of such Principal Party (determined pursuant to Section 11.4) on the date
of consummation of such consolidation, merger, sale or


                                      22
<PAGE>
 
transfer; provided, that the price per Right so payable and the number of Common
Shares of such Principal Party so receivable upon exercise of a Right shall
thereafter be subject to further adjustment as appropriate in accordance with
Section 11.6 to reflect any events covered thereby occurring in respect of the
Common Shares of such Principal Party after the occurrence of such
consolidation, merger, sale or transfer; (ii) such Principal Party shall
thereafter be liable for, and shall assume, by virtue of such consolidation,
merger, sale or transfer, 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; and (iv) such Principal Party shall take such steps
(including, but not limited to, the reservation of a sufficient number of its
Common Shares in accordance with Section 9) in connection with such consummation
as may be necessary to assure that the provisions hereof shall thereafter be
applicable, as nearly as reasonably may be, in relation to its Common Shares
thereafter deliverable upon the exercise of the Rights; provided that, upon the
subsequent occurrence of any consolidation, merger, sale or transfer of assets
or other extraordinary transaction in respect of such Principal Party, each
holder of a Right shall thereupon be entitled to receive, upon exercise of a
Right and payment of the Purchase Price as provided in this Section 13.1, such
cash, shares, rights, warrants and other property which such holder would have
been entitled to receive had such holder, at the time of such transaction, owned
the Common Shares of the Principal Party receivable upon the exercise of a Right
pursuant to this Section 13.1, and such Principal Party shall take such steps
(including, but not limited to, reservation of shares of stock) as may be
necessary to permit the subsequent exercise of the Rights in accordance with the
terms hereof for such cash, shares, rights, warrants and other property. The
Company shall not consummate any such consolidation, merger, sale or transfer
unless prior thereto the Company and such Principal Party shall have executed
and delivered to the Rights Agent a supplemental agreement confirming that the
requirements of this Section 13.1 and Section 13.2 shall promptly be performed
in accordance with their terms and that such consolidation, merger, sale or
transfer of assets shall not result in a default by the Principal Party under
this Agreement as the same shall have been assumed by the Principal Party
pursuant to this Section 13.1 and Section 13.2 and providing that, as soon as
practicable after executing such agreement pursuant to this Section 13, the
Principal Party, at its own expense, shall

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

               (2)  use its best efforts, if the Common Shares 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 purchasable upon exercise
of the Rights on the New York Stock Exchange or such securities exchange, or, if
the Common Shares of the Principal Party shall not be listed or admitted to
trading on the New York Stock Exchange or a national securities exchange, to
cause


                                      23
<PAGE>
 
the Rights and the securities receivable upon exercise of the Rights to be
authorized for quotation on Nasdaq or on such other system then in use;

               (3)  deliver to holders of the Rights historical financial
statements for the Principal Party which comply in all respects with the
requirements for registration on Form 10 (or any successor form) under the
Exchange Act; and

               (4)  obtain waivers of any rights of first refusal or preemptive
rights in respect of the Common Shares of the Principal Party subject to
purchase upon exercise of outstanding Rights.

          In case the Principal Party has provision in any of its authorized
securities or in its certificate of incorporation or by-laws or other instrument
governing its corporate affairs, which provision would have the effect of (i)
causing such Principal Party to issue (other than to holders of Rights pursuant
to this Section 13), in connection with, or as a consequence of, the
consummation of a transaction referred to in this Section 13, Common Shares or
common stock equivalents of such Principal Party at less than the then current
market price per share thereof (determined pursuant to Section 11.4) or
securities exercisable for, or convertible into, Common Shares or common stock
equivalents of such Principal Party at less than such then current market price
(other than to holders of Rights pursuant to this Section 13), or (ii) providing
for any special payment, taxes or similar provision in connection with the
issuance of the Common Shares of such Principal Party pursuant to the provision
of Section 13, then, in such event, the Company hereby agrees with each holder
of Rights that it shall not consummate any such transaction unless prior thereto
the Company and such Principal Party shall have executed and delivered to the
Rights Agent a supplemental agreement providing that the provision in question
of such Principal Party shall have been canceled, waived or amended, or that the
authorized securities shall be redeemed, so that the applicable provision will
have no effect in connection with, or as a consequence of, the consummation of
the proposed transaction.

          The Company covenants and agrees that it shall not, at any time after
the Trigger Event, enter into any transaction of the type described in clauses
(A) through (C) of this Section 13.1 if (i) at the time of or immediately after
such consolidation, merger, sale, transfer or other transaction 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, (ii) prior to, simultaneously with or
immediately after such consolidation, merger, sale, transfer or other
transaction, the stockholders of the Person who constitutes, or would
constitute, the Principal Party for purposes of Section 13.2 shall have received
a distribution of Rights previously owned by such Person or any of its
Affiliates or Associates or (iii) the form or nature of organization of the
Principal Party would preclude or limit the exercisability of the Rights. The
provisions of this Section 13 shall similarly apply to successive transactions
of the type described in clauses (A) through (C) of this Section 13.1.


                                      24
<PAGE>
 
               13.2.  Principal Party.  "Principal Party" shall mean:

               (i)    in the case of any transaction described in (A) or (B) of
the first sentence of Section 13.1: (i) the Person that is the issuer of the
securities into which the Common Shares are converted in such merger or
consolidation, or, if there is more than one such issuer, the issuer the Common
Shares of which have the greatest aggregate market value of shares outstanding,
or (ii) if no securities are so issued, (x) the Person that is the other party
to the merger, if such Person survives said merger, or, if there is more than
one such Person, the Person the Common Shares of which have the greatest
aggregate market value of shares outstanding or (y) if the Person that is the
other party to the merger does not survive the merger, the Person that does
survive the merger (including the Company if it survives) or (z) the Person
resulting from the consolidation; provided, however, that in any such case
described in the foregoing clause (A) or (B) of Section 13.1, if the Common
Shares of such Person are not at such time or have not been continuously over
the preceding 12-month period registered under Section 12 of the Exchange Act,
then (1) if such Person is a direct or indirect Subsidiary of another Person the
Common Shares of which are and have been so registered, the term "Principal
Party" shall refer to such other Person, or (2) if such Person is a Subsidiary,
directly or indirectly, of more than one Person, the Common Shares of all of
which are and have been so registered, the term "Principal Party" shall refer to
whichever of such Persons is the issuer of Common Shares having the greatest
aggregate market value of shares outstanding, or (3) if such Person is owned,
directly or indirectly, by a joint venture formed by two or more Persons that
are not owned, directly or indirectly, by the same Person, the rules set forth
in clauses (1) and (2) above shall apply to each of the owners having an
interest in the venture as if the Person owned by the joint venture was a
Subsidiary of both or all of such joint venturers, and the Principal Party in
each such case shall bear the obligations set forth in this Section 13 in the
same ratio as its interest in such Person bears to the total of such interests;
and

               (ii)   in the case of any transaction described in (C) of the
first sentence in Section 13.1, the Person that is the party receiving the
greatest portion of the assets or earning power transferred pursuant to such
transaction or transactions, or, if each Person that is a party to such
transaction or transactions receives the same portion of the assets or earning
power so transferred or if the Person receiving the greatest portion of the
assets or earning power cannot be determined, whichever of such Persons is the
issuer of Common Shares having the greatest aggregate market value of shares
outstanding.

               13.3.  Approved Acquisitions.  Notwithstanding anything contained
herein to the contrary, in the event of any merger or other acquisition
transaction involving the Company pursuant to a merger or other acquisition
agreement between the Company and any Person (or one or more of such Person's
Affiliates or Associates) which agreement has been approved by the Board of
Directors of the Company prior to any Person becoming an Acquiring Person, this
Agreement and the rights of holders of Rights hereunder shall be terminated in
accordance with Section 7.1.


                                      25
<PAGE>
 
          Section 14.  Fractional Rights and Fractional Shares.

               14.1.   Cash in Lieu of Fractional Rights.  The Company shall not
be required to issue fractions of Rights or to distribute Right Certificates
which evidence fractional Rights (except prior to the Distribution Date in
accordance with Section 11.15). In lieu of such fractional Rights, there shall
be paid to the registered holders of the Right 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 a whole Right. For the purposes
of this Section 14.1, 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, 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 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 listed on
the principal national securities exchange on which the Rights are listed or
admitted to trading or, if the Rights 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 Nasdaq 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 of Directors of the Company. If on any such
date no such market maker is making a market in the Rights, the current market
value of the Rights on such date shall be the fair value of the Rights as
determined in good faith by the Board of Directors of the Company, or, if at the
time of such determination there is an Acquiring Person, by a nationally
recognized investment banking firm selected by the Board of Directors of the
Company, which shall have the duty to make such determination in a reasonable
and objective manner, which determination shall be described in a statement
filed with the Rights Agent and shall be conclusive for all purposes.

               14.2.   Cash in Lieu of Fractional Preferred Shares.  The Company
shall not be required to issue fractions of Preferred Shares (other than
fractions which are integral multiples of one one-thousandth of a Preferred
Share) upon exercise or exchange of the Rights or to distribute certificates
which evidence fractional Preferred Shares (other than fractions which are
integral multiples of one one-thousandth of a Preferred Share). Interests in
fractions of Preferred Shares in integral multiples of one one-thousandth of a
Preferred Share may, at the election of the Company, be evidenced by depositary
receipts, pursuant to an appropriate agreement between the Company and a
depositary selected by it; provided, that such agreement shall provide that the
holders of such depositary receipts shall have all the rights, privileges and
preferences to which they are entitled as beneficial owners of the Preferred
Shares represented by such depositary receipts. In lieu of fractional Preferred
Shares that are not integral multiples of one one-thousandth of a Preferred
Share, the Company shall pay to the registered holders of Right Certificates at
the time such Rights are exercised or exchanged as herein provided an amount in
cash equal to the same fraction of the current per share market price of one
Preferred


                                      26
<PAGE>
 
Share (as determined in accordance with Section 14.1) for the Trading Day
immediately prior to the date of such exercise or exchange.

               14.3.  Cash in Lieu of Fractional Common Shares.  The Company
shall not be required to issue fractions of Common Shares or to distribute
certificates which evidence fractional Common Shares upon the exercise or
exchange of Rights. In lieu of such fractional Common Shares, the Company shall
pay to the registered holders of the Right Certificates with regard to which
such fractional Common Shares would otherwise be issuable an amount in cash
equal to the same fraction of the current market value of a whole Common Share
(as determined in accordance with Section 14.1) for the Trading Day immediately
prior to the date of such exercise or exchange.

               14.4.  Waiver of Right to Receive Fractional Rights or Shares. 
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 or
exchange 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 given to the Rights Agent under
Section 18, are vested in the respective registered holders of the Right
Certificates (and, prior to the Distribution Date, the registered holders of the
Common Shares); and any registered holder of any Right Certificate (or, prior to
the Distribution Date, of the Common Shares), without the consent of the Rights
Agent or of the holder of any other Right Certificate (or, prior to the
Distribution Date, of the Common Shares), may, in his own behalf and for his own
benefit, enforce this Agreement, and may institute and maintain any suit, action
or proceeding against the Company to enforce this Agreement, or otherwise
enforce or act in respect of his right to exercise the Rights evidenced by such
Right Certificate in the manner provided in such Right 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
shall be entitled to specific performance of the obligations under, and
injunctive relief against actual or threatened violations of, the obligations of
any Person (including, without limitation, the Company) subject to this
Agreement.

          Section 16.  Agreement of Right 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 Shares;

               (b)  as of and after the Distribution Date, the Right
     Certificates are transferable only on the registry books of the Rights
     Agent if surrendered at the office of the Rights Agent designated for such
     purpose, duly endorsed or accompanied by a proper instrument of transfer
     with all required certifications completed; and


                                      27
<PAGE>
 
               (c)     the Company and the Rights Agent may deem and treat the
     Person in whose name the Right Certificate (or, prior to the Distribution
     Date, the associated Common Shares certificate) is registered as the
     absolute owner thereof and of the Rights evidenced thereby (notwithstanding
     any notations of ownership or writing on the Right Certificates or the
     associated Common Shares certificate made by anyone other than the Company
     or the Rights Agent) for all purposes whatsoever, and neither the Company
     nor the Rights Agent shall be affected by any notice to the contrary.

          Section 17.  Right Certificate Holder Not Deemed a Stockholder.  No
holder, as such, of any Right Certificate shall be entitled to vote, receive
dividends or be deemed for any purpose the holder of the Preferred Shares 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 Right Certificate be construed to confer upon the holder of any Right
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 24), or to receive dividends or
subscription rights, or otherwise, until the Right or Rights evidenced by such
Right Certificate shall have been exercised in accordance with the provisions
hereof.

          Section 18.  Concerning the Rights Agent.  The Company agrees to pay
to the Rights Agent reasonable compensation for all services rendered by it
hereunder in accordance with a fee schedule to be mutually agreed upon and, from
time to time, on demand of the Rights Agent, its reasonable expenses and counsel
fees and other disbursements incurred in the preparation, delivery, amendment,
administration and execution of this Agreement and the exercise and performance
of its duties hereunder. The Company also agrees to indemnify the Rights Agent
for, and to hold it harmless against, any loss, liability damage, judgment, fine
penalty, claim, demand, settlement, cost, or expense, incurred without gross
negligence, bad faith or willful misconduct on the part of the Rights Agent as
determined by a court of competent jurisdiction, for any act taken, suffered or
omitted by the Rights Agent in connection with the acceptance and administration
of this Agreement, including the costs and expenses of defending against any
claim of liability arising therefrom, directly or indirectly.

          The 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 the acceptance and administration of this Agreement in reliance
upon any Right Certificate or certificate for the Preferred Shares or the Common
Shares or for other securities of the Company, instrument of assignment or
transfer, power of attorney, endorsement, affidavit, letter, notice,
instruction, 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.

          Section 19.  Merger or Consolidation or Change of Name of Rights
Agent. Any Person into which the Rights Agent or any successor Rights Agent may
be merged or with


                                      28
<PAGE>
 
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 or stock transfer
business of the Rights Agent or any successor Rights Agent, shall be the
successor to the Rights Agent under this Agreement without the execution or
filing of any paper or any further act on the part of any of the parties hereto,
provided that such corporation or limited liability company would be eligible
for appointment as a successor Rights Agent under the provisions of Section 21.
In case at the time such successor Rights Agent shall succeed to the agency
created by this Agreement, any of the Right 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 Right
Certificates so countersigned; and in case at that time any of the Right
Certificates shall not have been countersigned, any successor Rights Agent may
countersign such Right 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
Right Certificates shall have the full force provided in the Right Certificates
and in this Agreement.

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

          Section 20.  Duties of Rights Agent.  The Rights Agent undertakes the
duties and obligations, and only the duties and obligations, expressly imposed
by this Agreement (and no implied duties and obligations) upon the following
terms and conditions, by all of which the Company and the holders of Right
Certificates, by their acceptance thereof, shall be bound:

               20.1    Legal Counsel.  The Rights Agent may consult with legal
counsel selected by it (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 with respect to, and the Rights Agent shall incur
no liability for or in respect of, action taken, suffered or omitted by it in
good faith and in accordance with such advice or opinion.

               20.2.   Certificates as to Facts or Matters.  Whenever in the
performance of its duties under this Agreement the Rights Agent shall deem it
necessary or desirable that any fact or matter be proved or established by the
Company prior to taking or suffering any action hereunder, such fact or matter
(unless other evidence in respect thereof be herein specifically prescribed) may
be deemed to be conclusively proved and established by a certificate signed by
any one of the Chairman of the Board of Directors, the Chief Executive Officer,
the President, the Chief Financial Officer, any Vice President, the Treasurer,
the Secretary or any Assistant Treasurer or Assistant Secretary of the Company
and delivered to the Rights Agent; and such certificate shall be full
authorization to the Rights Agent for any action taken or suffered in good


                                      29
<PAGE>
 
faith by it under the provisions of this Agreement in reliance upon such
certificate.

               20.3.  Standard of Care.  The Rights Agent shall be liable
hereunder only for its own gross negligence, bad faith or willful misconduct as
determined by a court of competent jurisdiction. In no case will the Rights
Agent be liable for special, indirect, punitive, incidental or consequential
loss or damages of any kind whatsoever (including without limitation lost
profits), even if the Rights Agent has been advised of the possibility of such
damages.

               20.4.  Reliance on Agreement and Right Certificates.  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 Right 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.

               20.5.  No Responsibility as to Certain Matters.  The Rights Agent
shall not be under any liability or responsibility in respect of the validity of
this Agreement or the execution and delivery hereof (except the due execution
hereof by the Rights Agent) or in respect of the validity or execution of any
Right 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 Right 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 11.1.2) or any adjustment required under the
provisions of Sections 3, 11, 13, 23 or 27 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 Right Certificates after actual notice of any such change or
adjustment); nor shall it by any act hereunder be deemed to make any
representation or warranty as to the authorization or reservation of any
Preferred Shares or other securities to be issued pursuant to this Agreement or
any Right Certificate or as to whether any Preferred Shares will, when so
issued, be validly authorized and issued, fully paid and nonassessable.

               20.6.  Further Assurance by Company.  The Company agrees that it
will perform, execute, acknowledge and deliver or cause to be performed,
executed, acknowledged and delivered all such further and other acts,
instruments and assurances as may reasonably be required by the Rights Agent for
the carrying out or performing by the Rights Agent of the provisions of this
Agreement.

               20.7.  Authorized Company Officers.  The Rights Agent is hereby
authorized and directed to accept instructions with respect to the performance
of its duties hereunder from any one of the Chairman of the Board of Directors,
the Chief Executive Officer, the President, the Chief Financial Officer, any
Vice President, the Treasurer, the Secretary or any Assistant Treasurer or
Assistant Secretary of the Company, and to apply to such officers for advice or
instructions in connection with its duties under this Agreement, and it shall
not be liable for any action taken or suffered to be taken by it in good faith
in accordance with instructions of any such officer or for any delay in acting
while waiting for these instructions.


                                      30
<PAGE>
 
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 or omitted by the Rights Agent with respect to its duties or
obligations under this Agreement and the date on and/or after which such action
shall be taken or such omission shall be effective. The Rights Agent shall not
be liable to the Company for any action taken by, or omission of, the Rights
Agent in accordance with a proposal included in any such application on or after
the date specified therein (which date shall not be less than three business
days after the date any such officer actually receives such application, unless
any such officer shall have consented in writing to an earlier date) unless,
prior to taking of any such action (or the effective date in the case of
omission), the Rights Agent shall have received written instructions in response
to such application specifying the action to be taken or omitted.

               20.8.   Freedom to Trade in Company Securities.  The Rights Agent
and any stockholder, 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 legal entity.

               20.9.   Reliance on Attorneys and Agents.  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, omission,
default, neglect or misconduct of any such attorneys or agents or for any loss
to the Company or any other Person resulting from any such act, omission,
default, neglect or misconduct, absent gross negligence, bad faith or willful
misconduct in the selection and continued employment thereof.

               20.10.  Incomplete Certificate.  If, with respect to any Rights
Certificate surrendered to the Rights Agent for exercise or transfer, the
certificate contained in the form of assignment or the form of election to
purchase set forth on the reverse thereof, as the case may be, has not been
completed to certify the holder is not an Acquiring Person (or an Affiliate or
Associate thereof), the Rights Agent shall not take any further action with
respect to such requested exercise or transfer without first consulting with the
Company.

               20.11.  Rights Holders List.  At any time and from time to time
after the Distribution Date, upon the request of the Company, the Rights Agent
shall promptly deliver to the Company a list, as of the most recent practicable
date (or as of such earlier date as may be specified by the Company), of the
holders of record of Rights.

          Section 21.  Change of Rights Agent.  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 Shares and/or Preferred Shares, as applicable,
by registered or certified mail. Following the Distribution


                                      31
<PAGE>
 
Date, the Company shall promptly notify the holders of the Right Certificates by
first-class mail of any such resignation. 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 Shares and/or Preferred Shares, as applicable,
by registered or certified mail, and to the holders of the Right Certificates by
first-class mail. If the Rights Agent shall resign or be removed or shall
otherwise become incapable of acting, the resigning, removed, or incapacitated
Rights Agent shall remit to the Company, or to any successor Rights Agent
designated by the Company, all books, records, funds, certificates or other
documents or instruments of any kind then in its possession which were acquired
by such resigning, removed or incapacitated Rights Agent in connection with its
services as Rights Agent hereunder, and shall thereafter be discharged from all
duties and obligations hereunder. Following notice of such removal, resignation
or incapacity, the Company shall appoint a successor to such 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 Right Certificate (who shall, with such
notice, submit his Right Certificate for inspection by the Company), then the
registered holder of any Right Certificate may apply to any court of competent
jurisdiction for the appointment of a new Rights Agent. Any successor Rights
Agent, whether appointed by the Company or by such a court, shall be a
corporation organized and doing business under the laws of the United States or
of the State of New York or the State of California (or any other state of the
United States so long as such corporation is authorized to do business as a
banking institution in the State of New York or California) in good standing,
having an office in the State of New York or the State of California, which is
authorized under such laws to exercise stock transfer or corporate trust powers
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 $10 million. After appointment, the successor Rights Agent
shall be vested with the same powers, rights, duties and responsibilities as if
it had been originally named as Rights Agent without further act or deed; but
the predecessor Rights Agent shall deliver and transfer to the successor Rights
Agent any property at the time held by it hereunder, and execute and deliver any
further assurance, conveyance, act or deed necessary for the purpose. Not later
than the effective date of any such appointment the Company shall file notice
thereof in writing with the predecessor Rights Agent and each transfer agent of
the Common Shares and/or Preferred Shares, as applicable, and, following the
Distribution Date, mail a notice thereof in writing to the registered holders of
the Right 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.

          Section 22.  Issuance of New Right Certificates.  Notwithstanding any
of the provisions of this Agreement or of the Rights to the contrary, the
Company may, at its option, issue new Right Certificates evidencing Rights in
such form as may be approved by its Board of Directors to reflect any adjustment
or change in the Purchase Price and the number or kind or class of shares or
other securities or property purchasable under the Right Certificates made in
accordance with the provisions of this Agreement. In addition, in connection
with the issuance


                                      32
<PAGE>
 
or sale of Common Shares following the Distribution Date and prior to the
Expiration Date, the Company shall, with respect to Common Shares so issued or
sold pursuant to the exercise of stock options or under any employee plan or
arrangement, granted or awarded, or upon exercise, conversion or exchange of
securities hereinafter issued by the Company, in each case existing prior to the
Distribution Date, issue Right Certificates representing the appropriate number
of Rights in connection with such issuance or sale; provided, however, that (i)
no such Right 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 Right Certificate would be issued and (ii) no such Right
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.

               Section 23.1  Right to Redeem.  The Board of Directors of the
Company may, at its option, at any time prior to a Trigger Event, redeem all but
not less than all of the then outstanding Rights at a redemption price of $.01
per Right, appropriately adjusted to reflect any stock split, stock dividend,
recapitalization or similar transaction occurring after the date hereof (such
redemption price being hereinafter referred to as the "Redemption Price"), and
the Company may, at its option, pay the Redemption Price in Common Shares (based
on the "current per share market price," determined pursuant to Section 11.4, of
the Common Shares at the time of redemption), cash or any other form of
consideration deemed appropriate by the Board of Directors. The redemption of
the Rights by the Board of Directors may be made effective at such time, on such
basis and subject to such conditions as the Board of Directors in its sole
discretion may establish.

               Section 23.2.  Redemption Procedures.  Immediately upon the
action of the Board of Directors of the Company ordering the redemption of the
Rights (or at such later time as the Board of Directors may establish for the
effectiveness of such redemption), 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 for
each Right so held. The Company shall promptly give public notice of such
redemption; provided, however, that the failure to give, or any defect in, any
such notice shall not affect the validity of such redemption. The Company shall
promptly give, or cause the Rights Agent to give, notice of such redemption to
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 Shares. 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 shall state the method by which the
payment of the Redemption Price will be made. Neither the Company nor any of its
Affiliates or Associates may redeem, acquire or purchase for value any Rights at
any time in any manner other than that specifically set forth in this Section 23
or in Section 27, and other than in connection with the purchase, acquisition or
redemption of Common Shares prior to the Distribution Date.


                                      33
<PAGE>
 
          Section 24.  Notice of Certain Events.  In case the Company shall
propose at any time after the earlier of the Shares Acquisition Date and the
Distribution Date (a) to pay any dividend payable in stock of any class to the
holders of Preferred Shares or to make any other distribution to the holders of
Preferred Shares (other than a regular periodic cash dividend at a rate not in
excess of 125% of the rate of the last regular periodic cash dividend
theretofore paid or, in case regular periodic cash dividends have not
theretofore been paid, at a rate not in excess of 50% of the average net income
per share of the Company for the four quarters ended immediately prior to the
payment of such dividends, or a stock dividend on, or a subdivision, combination
or reclassification of the Common Shares), or (b) to offer to the holders of
Preferred Shares rights or warrants to subscribe for or to purchase any
additional Preferred Shares or shares of stock of any class or any other
securities, rights or options, or (c) to effect any reclassification of its
Preferred Shares (other than a reclassification involving only the subdivision
of outstanding Preferred Shares), or (d) 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 50% or more of the assets or earning power of the Company and
its Subsidiaries (taken as a whole) to, any other Person (other than pursuant to
a merger or other acquisition agreement of the type described in Section
1.3(ii)(A)(z)), or (e) to effect the liquidation, dissolution or winding up of
the Company, or (f) to declare or pay any dividend on the Common Shares payable
in Common Shares or to effect a subdivision, combination or consolidation of the
Common Shares (by reclassification or otherwise than by payment of dividends in
Common Shares), then, in each such case, the Company shall give to the Rights
Agent and to each holder of a Right Certificate, in accordance with Section 25,
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 Preferred Shares and/or Common
Shares, if any such date is to be fixed, and such notice shall be so given in
the case of any action covered by clause (a) or (b) above at least ten (10) days
prior to the record date for determining holders of the Preferred Shares for
purposes of such action, and in the case of any such other action, at least ten
(10) days prior to the date of the taking of such proposed action or the date of
participation therein by the holders of the Preferred Shares and/or Common
Shares, whichever shall be the earlier.

          In case any event set forth in Section 11.1.2 or Section 13 shall
occur, then, in any such case, (i) the Company shall as soon as practicable
thereafter give to the Rights Agent and to each holder of a Right Certificate,
in accordance with Section 25, a notice of the occurrence of such event, which
notice shall describe the event and the consequences of the event to holders of
Rights under Section 11.1.2 and Section 13, and (ii) all references in this
Section 24 to Preferred Shares shall be deemed thereafter to refer to Common
Shares and/or, if appropriate, other securities.

          Notwithstanding anything in this Agreement to the contrary, prior to
the Distribution Date a filing by the Company with the Securities and Exchange
Commission shall


                                      34
<PAGE>
 
constitute sufficient notice to the holders of securities of the Company,
including the Rights, for purposes of this Agreement and no other notice need be
given.

          Section 25.  Notices.  Notices or demands authorized by this Agreement
to be given or made by the Rights Agent or by the holder of any Right
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:

               Rental Service Corporation
               6929 Greenway Parkway
               Suite 200
               Scottsdale, Arizona 85254
               Attention:  Chief Executive Officer and Chief Financial Officer

Subject to the provisions of Section 21 and Section 24, any notice or demand
authorized by this Agreement to be given or made by the Company or by the holder
of any Right 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:

               ChaseMellon Shareholder Services, L.L.C.
               400 S. Hope Street, 4th Floor
               Los Angeles, CA 9007
               Attention:  Shareholder Services Division

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

          Section 26.  Supplements and Amendments.  For so long as the Rights
are then redeemable, the Company may in its sole and absolute discretion, and
the Rights Agent shall, if the Company so directs, supplement or amend any
provision of this Agreement in any respect without the approval of any holders
of Rights or Common Shares. From and after the time that the Rights are no
longer redeemable, the Company may, and the Rights Agent shall, if the Company
so directs, from time to time supplement or amend this Agreement without the
approval of any holders of Rights (i) to cure any ambiguity or to correct or
supplement any provision contained herein which may be defective or inconsistent
with any other provisions herein or (ii) to make any other changes or provisions
in regard to matters or questions arising hereunder which the Company may deem
necessary or desirable, including but not limited to extending the Final
Expiration Date; provided, however, that no such supplement or amendment shall
adversely affect the interests of the holders of Rights as such (other than an
Acquiring Person or an Affiliate or Associate of an Acquiring Person), and no
such supplement or amendment may cause the Rights again to become redeemable or
cause this Agreement again to


                                      35
<PAGE>
 
become amendable other than in accordance with this sentence; provided further,
that the right of the Board of Directors to extend the Distribution Date shall
not require any amendment or supplement hereunder. 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
26, the Rights Agent shall execute such supplement or amendment.

          Section 27.  Exchange.

               27.1.   Exchange of Common Shares for Rights.  The Board of
Directors of the Company may, at its option, at any time after the occurrence of
a Trigger Event, exchange Common Shares for all or part of the then outstanding
and exercisable Rights (which shall not include Rights that have become void
pursuant to the provisions of Section 11.1.2) by exchanging at an exchange ratio
of that number of Common Shares having an aggregate value equal to the Spread
(with such value being based on the current per share market price (as
determined pursuant to Section 11.4) on the date of the occurrence of a Trigger
Event) per Right, appropriately adjusted to reflect any stock split, stock
dividend or similar transaction occurring after the date hereof (such amount per
Right being hereinafter referred to as the "Exchange Consideration").
Notwithstanding the foregoing, the Board of Directors shall not be empowered to
effect such exchange at any time after any Acquiring Person shall have become
the Beneficial Owner of 50% or more of the Common Shares then outstanding. From
and after the occurrence of an event specified in Section 13.1, any Rights that
theretofore have not been exchanged pursuant to this Section 27.1 shall
thereafter be exercisable only in accordance with Section 13 and may not be
exchanged pursuant to this Section 27.1. The exchange of the Rights by the Board
of Directors may be made effective at such time, on such basis and with such
conditions as the Board of Directors in its sole discretion may establish.

               27.2.   Exchange Procedures.  Immediately upon the action of the
Board of Directors of the Company ordering the exchange for any Rights pursuant
to Section 27.1 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 the Exchange Consideration. 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 shall state the
method by which the exchange of the Common Shares for Rights will be effected
and, in the event of any partial exchange, the number of Rights which will be
exchanged. Any partial exchange shall be effected pro rata based on the number
of Rights (other than the Rights that have become void pursuant to the
provisions of Section 11.1.2) held by each holder of Rights.

               27.3.   Insufficient Shares.  The Company may at its option
substitute, and, in the event that there shall not be sufficient Common Shares
issued but not outstanding or authorized but unissued to permit an exchange of
Rights for Common Shares as contemplated in


                                      36
<PAGE>
 
accordance with this Section 27, the Company shall substitute to the extent of
such insufficiency, for each Common Share that would otherwise be issuable upon
exchange of a Right, a number of Preferred Shares or fraction thereof (or
equivalent preferred stock, as such term is defined in Section 11.2) such that
the current per share market price (determined pursuant to Section 11.4) of one
Preferred Share (or equivalent preferred share) multiplied by such number or
fraction is equal to the current per share market price of one Common Share
(determined pursuant to Section 11.4) as of the date of such exchange.

          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.

          Section 29.  Benefits of this Agreement.  Nothing in this Agreement
shall be construed to give to any Person or corporation other than the Company,
the Rights Agent and the registered holders of the Right Certificates (and,
prior to the Distribution Date, the Common Shares) 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 Right Certificates (and, prior to the Distribution Date, the
Common Shares).

          Section 30.  Determination and Actions by the Board of Directors.  The
Board of Directors of the Company shall have the exclusive power and authority
to administer this Agreement and to exercise the rights and powers specifically
granted to the Board of Directors of the Company 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 amend this Agreement). All such actions,
calculations, interpretations and determinations (including, for purposes of
clause (y) below, all omissions with respect to the foregoing) that are done or
made by the Board of Directors of the Company in good faith (and the Rights
Agent may assume the Board of Directors of the Company acted in good faith)
shall (x) be final, conclusive and binding on the Company, the Rights Agent, the
holders of the Rights, as such, and all other Persons, and (y) not subject the
Board of Directors to any liability to the holders of the Rights.

          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.

          Section 32.  Governing Law.  This Agreement and each Right Certificate
issued hereunder shall be deemed to be a contract made under the laws of the
State of Delaware and for all purposes shall be governed by and construed in
accordance with the laws of such State applicable to contracts to be made and
performed entirely within such State; except that all


                                      37
<PAGE>
 
provisions regarding the rights, duties and obligations of the Rights Agent
shall be governed by and construed in accordance with the laws of the State of
New York applicable to contracts made and to be performed entirely within such
State.

          Section 33.  Counterparts.  This Agreement may be executed in any
number of counterparts and each of such counterparts shall for all purposes be
deemed to be an original, and all such counterparts shall together constitute
but one and the same instrument.

          Section 34.  Descriptive Heading.  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.

                                      38
<PAGE>
 
          IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be duly executed, as of the day and year first above written.

                                       RENTAL SERVICE CORPORATION

                                       By /s/ Robert M. Wilson
                                         ------------------------
                                          Name: Robert M. Wilson
                                          Title: Executive Vice President & CFO

                                       CHASEMELLON SHAREHOLDER 
                                       SERVICES, L.L.C.

                                       By /s/ Michael E. Dzieciolowski
                                         ------------------------------
                                          Name: Michael E. Dzieciolowski
                                          Title: Assistant Vice President




                                      39
<PAGE>
 
                                                                       EXHIBIT A
                                                                       ---------

                                    FORM OF

                          CERTIFICATE OF DESIGNATIONS

                                      of

                 SERIES A JUNIOR PARTICIPATING PREFERRED STOCK

                                      of

                          RENTAL SERVICE CORPORATION

                        (Pursuant to Section 151 of the

                       Delaware General Corporation Law)

                         _____________________________

          Rental Service Corporation, a corporation organized and existing under
the General Corporation Law of the State of Delaware (hereinafter called the
"Corporation"), hereby certifies that the following resolution was adopted by
the Board of Directors of the Corporation as required by Section 151 of the
General Corporation Law at a meeting duly called and held on April 15, 1999.

          RESOLVED, that pursuant to the authority granted to and vested in the
Board of Directors of this Corporation (hereinafter called the "Board of
Directors" or the "Board") in accordance with the provisions of the Certificate
of Incorporation of this Corporation, the Board of Directors hereby creates a
series of Preferred Stock, par value $.01 per share (the "Preferred Stock"), of
the Corporation and hereby states the designation and number of shares, and
fixes the relative rights, powers and preferences, and qualifications,
limitations and restrictions thereof as follows:

          Section 1.  Designation and Amount.  The shares of such series shall
be designated as "Series A Junior Participating Preferred Stock" (the "Series A
Preferred Stock") and the number of shares constituting the Series A Preferred
Stock shall be 40,000. Such number of shares may be increased or decreased by
resolution of the Board of Directors; provided, that no decrease shall reduce
the number of shares of Series A 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 Preferred Stock.

          Section 2.  Dividends and Distributions.

          (A)  Subject to the prior and superior rights of the holders of any
     shares of any class or series of stock of this Corporation ranking prior
     and superior to the Series A


                                      A-1
<PAGE>
 
     Preferred Stock with respect to dividends, the holders of shares of Series
     A Preferred Stock, in preference to the holders of Common Stock, par value
     $.01 per share (the "Common Stock"), of the Corporation, and of any other
     stock ranking junior to the Series A 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 first day of March, June, September and December 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 the first
     issuance of a share or fraction of a share of Series A Preferred Stock, in
     an amount per share (rounded to the nearest cent) equal to the greater of
     (a) $1.00 or (b) subject to the provision for adjustment hereinafter set
     forth, 1,000 times the aggregate per share amount of all cash dividends,
     and 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 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 Preferred Stock.
     In the event the Corporation shall at any time declare or pay any dividend
     on the Common Stock payable in shares of Common Stock, or effect a
     subdivision, combination or consolidation of the outstanding shares of
     Common Stock (by reclassification or otherwise than by payment of a
     dividend in shares of Common Stock) into a greater or lesser number of
     shares of Common Stock, then in each such case the amount to which holders
     of shares of Series A 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 Preferred Stock as provided in paragraph (A) of this Section 2
     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
     $1.00 per share on the Series A Preferred 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 Preferred Stock from the Quarterly Dividend Payment Date
     next preceding the date of issue of such shares, unless the date of issue
     of such shares is prior to the record date 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 Preferred Stock entitled to
     receive a


                                      A-2
<PAGE>
 
     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
     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 Preferred Stock entitled to receive payment
     of a dividend or distribution declared thereon, which record date shall be
     not more than 60 days prior to the date fixed for the payment thereof.

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

          (A)  Subject to the provision for adjustment hereinafter set forth,
     each share of Series A Preferred Stock shall entitle the holder thereof to
     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 declare or pay
     any dividend on the Common Stock payable in shares of Common Stock, or
     effect a subdivision, combination or consolidation of the outstanding
     shares of Common Stock (by reclassification or otherwise than by payment of
     a dividend in shares of Common Stock) into a greater or lesser number of
     shares of Common Stock, then in each such case the number of votes per
     share to which holders of shares of Series A 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 herein, in any other Certificate of
     Designations creating a series of Preferred Stock or any similar stock, or
     by law, the holders of shares of Series A Preferred Stock and the holders
     of shares of Common Stock and any other capital 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, or as otherwise provided by law,
     holders of Series A 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 quarterly dividends or other dividends or distributions
     payable on the Series A Preferred Stock as provided in Section 2 are in
     arrears, thereafter and


                                      A-3
<PAGE>
 
until all accrued and unpaid dividends and distributions, whether or not
declared, on shares of Series A Preferred Stock outstanding shall have been paid
in full, the Corporation shall not:

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

               (ii)   declare or pay dividends, 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
          Preferred Stock, except dividends paid ratably on the Series A
          Preferred Stock and all such parity stock on which dividends are
          payable or in arrears in proportion to the total amounts to which the
          holders of all such shares are then entitled;

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

               (iv)   redeem or purchase or otherwise acquire for consideration
          any shares of Series A Preferred Stock, or any shares of stock ranking
          on a parity with the Series A Preferred Stock, except in accordance
          with a purchase offer made in writing or 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 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 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
subject to the conditions and restrictions on issuance set forth herein, in the
Certificate of Incorporation, or in any other Certificate of Designations
creating a series of Preferred Stock or any similar stock or as otherwise
required by law.


                                      A-4
<PAGE>
 
          Section 6.  Liquidation, Dissolution or Winding Up.

          (A)  Upon any liquidation, dissolution or winding up of the
     Corporation, voluntary or otherwise no distribution shall be made (1) to
     the holders of shares of stock ranking junior (either as to dividends or
     upon liquidation, dissolution or winding up) to the Series A Preferred
     Stock unless, prior thereto, the holders of shares of Series A Preferred
     Stock shall have received an amount per share (the "Series A Liquidation
     Preference") equal to $1,000 per share, plus an amount equal to accrued and
     unpaid dividends and distributions thereon, whether or not declared, to the
     date of such payment, provided that the holders of shares of Series A
     Preferred Stock shall be entitled to receive an aggregate amount per share,
     subject to the provision for adjustment hereinafter set forth, equal to
     1,000 times the aggregate amount to be distributed per share to holders of
     shares of Common Stock, or (2) to the holders of shares of stock ranking on
     a parity (either as to dividends or upon liquidation, dissolution or
     winding up) with the Series A Preferred Stock, except distributions made
     ratably on the Series A Preferred Stock and all such parity stock in
     proportion to the total amounts to which the holders of all such shares are
     entitled upon such liquidation, dissolution or winding up. In the event the
     Corporation shall at any time declare or pay any dividend on the Common
     Stock payable in shares of Common Stock, or effect a subdivision,
     combination or consolidation of the outstanding shares of Common Stock (by
     reclassification or otherwise than by payment of a dividend in shares of
     Common Stock) into a greater or lesser number of shares of Common Stock,
     then in each such case the aggregate amount to which holders of shares of
     Series A Preferred Stock were entitled immediately prior to such event
     under the proviso in clause (1) 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
     are outstanding immediately prior to such event.

          (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 classes and series of stock of
     the Corporation, if any, that rank on a parity with the Series A Preferred
     Stock in respect thereof, then the assets available for such distribution
     shall be distributed ratably to the holders of the Series A Preferred Stock
     and the holders of such parity shares in proportion to their respective
     liquidation preferences.

          (C)  Neither the merger or consolidation of the Corporation into or
     with another corporation nor the merger or consolidation of any other
     corporation into or with the Corporation shall be deemed to be a
     liquidation, dissolution or winding up of the Corporation within the
     meaning of this Section 6.

          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,


                                      A-5
<PAGE>
 
then in any such case each share of Series A Preferred Stock shall at the same
time be similarly exchanged or changed into an amount per share, subject to the
provision for adjustment hereinafter set forth, equal to 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 declare
or pay any dividend on the Common Stock payable in shares of Common Stock, or
effect a subdivision, combination or consolidation of the outstanding shares of
Common Stock (by reclassification or otherwise than by payment of a dividend in
shares of Common Stock) into a greater or lesser number of shares of Common
Stock, 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 Preferred Stock
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.  No Redemption.  The shares of Series A Preferred Stock
shall not be redeemable by the Company.

          Section 9.  Rank.  The Series A Preferred Stock shall rank, with
respect to the payment of dividends and the distribution of assets upon
liquidation, dissolution or winding up, junior to all series of any other class
of the Corporation's Preferred Stock, except to the extent that any such other
series specifically provides that it shall rank on a parity with or junior to
the Series A Preferred Stock.

          Section 10.  Amendment.  At any time any shares of Series A Preferred
Stock are outstanding, the Certificate of Incorporation of the Corporation shall
not be amended in any manner which would materially alter or change the powers,
preferences or special rights of the Series A Preferred Stock so as to affect
them adversely without the affirmative vote of the holders of at least two-
thirds of the outstanding shares of Series A Preferred Stock, voting separately
as a single class.

          Section 11.  Fractional Shares.  Series A Preferred Stock may be
issued in fractions of a share that shall entitle the holder, in proportion to
such holder's fractional shares, to exercise voting rights, receive dividends,
participate in distributions and to have the benefit of all other rights of
holders of Series A Preferred Stock.

          IN WITNESS WHEREOF, this Certificate of Designations is executed on
behalf of the Corporation by its Secretary this ___ day of April __, 1999.


                                       ______________________________
                                       Secretary




                                      A-6
<PAGE>
 
                                                                       EXHIBIT B
                                                                       ---------

                          [Form of Right Certificate]

Certificate No. R-                                                _______ Rights

     NOT EXERCISABLE AFTER April 16, 2009 OR EARLIER IF NOTICE OF REDEMPTION OR
     EXCHANGE IS GIVEN OR THE 60TH DAY FOLLOWING THE DATE THAT THE COMPANY IS
     MERGED OR ACQUIRED PURSUANT TO AN AGREEMENT OF THE TYPE DESCRIBED IN
     SECTION 1.3(ii)(A)(z) OF THE AGREEMENT OR CERTAIN EVENTS AND TIME PERIODS
     DESCRIBED IN SECTION 7.1(v) OF THE AGREEMENT HAVE OCCURRED AND PASSED. THE
     RIGHTS ARE SUBJECT TO REDEMPTION AT $.01 PER RIGHT, AND TO EXCHANGE ON THE
     TERMS SET FORTH IN THE AGREEMENT. UNDER CERTAIN CIRCUMSTANCES (SPECIFIED IN
     SECTION 11.1.2 OF THE AGREEMENT), RIGHTS BENEFICIALLY OWNED BY OR
     TRANSFERRED TO AN ACQUIRING PERSON (AS DEFINED IN THE AGREEMENT), OR ANY
     SUBSEQUENT HOLDER OF SUCH RIGHTS WILL BECOME NULL AND VOID AND WILL NO
     LONGER BE TRANSFERABLE.

                               Right Certificate

                          RENTAL SERVICE CORPORATION

This certifies that         , or 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 April 16, 1999, as the same may be amended from time to time (the
"Agreement"), between Rental Service Corporation, a Delaware corporation (the
"Company"), and ChaseMellon Shareholder Services, L.L.C., a New Jersey limited
liability company, as Rights Agent (the "Rights Agent"), to purchase from the
Company at any time after the Distribution Date and prior to 5:00 P.M.
(New York City time) on April 16, 2009, at the offices of the Rights Agent, or
its successors as Rights Agent, designated for such purpose, one one-thousandth
of a fully paid, nonassessable share of Series A Junior Participating Preferred
Stock, par value $.01 per share (the "Preferred Shares") of the Company, at a
purchase price of $150.00 per one one-thousandth of a Preferred Share, subject
to adjustment (the "Purchase Price"), upon presentation and surrender of this
Right Certificate with the Form of Election to Purchase and certification duly
executed. The number of Rights evidenced by this Right Certificate (and the
number of one one-thousandths of a Preferred Share which may be purchased upon
exercise thereof) set forth above, and the Purchase Price set forth above, are
the number and Purchase Price as of April 16, 1999 based on the Preferred Shares
as constituted at such date. Capitalized terms used in this Right Certificate
without definition shall have the meanings ascribed to them in the Agreement. As
provided in the Agreement, the Purchase Price and the number of Preferred Shares
which may be purchased upon the exercise of the Rights evidenced by this Right
Certificate are subject to modification and adjustment upon the

                                      B-1
<PAGE>
 
happening of certain events.

          This Right Certificate is subject to all of the terms, provisions and
conditions of the Agreement, which terms, provisions and conditions are hereby
incorporated herein by reference and made a part hereof and to which 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 Right Certificates. Copies of the Agreement are
on file at the principal offices of the Company and the Rights Agent.

          This Right Certificate, with or without other Right Certificates, upon
surrender at the offices of the Rights Agent designated for such purpose, may be
exchanged for another Right 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 Preferred Share as the Rights evidenced by the Right
Certificate or Right Certificates surrendered shall have entitled such holder to
purchase. If this Right Certificate shall be exercised in part, the holder shall
be entitled to receive upon surrender hereof another Right Certificate or Right
Certificates for the number of whole Rights not exercised.

          Subject to the provisions of the Agreement, the Board of Directors
may, at its option, (i) redeem the Rights evidenced by this Right Certificate at
a redemption price of $.01 per Right or (ii) exchange Common Shares for the
Rights evidenced by this Certificate, in whole or in part.

          No fractional Preferred Shares will be issued upon the exercise of any
Right or Rights evidenced hereby (other than fractions of Preferred Shares which
are integral multiples of one one-thousandth of a Preferred Share, which may, at
the election of the Company, be evidenced by depository receipts), but in lieu
thereof a cash payment will be made, as provided in the Agreement.

          No holder of this Right Certificate, as such, shall be entitled to
vote or receive dividends or be deemed for any purpose the holder of the
Preferred Shares 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
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 Agreement), or to receive dividends or subscription rights, or
otherwise, until the Right or Rights evidenced by this Right Certificate shall
have been exercised as provided in the Agreement.

          If any term, provision, covenant or restriction of the 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 the Agreement shall remain in full force and effect and shall in
no way be affected, impaired or invalidated.


                                      B-2
<PAGE>
 
          This Right Certificate shall not be valid or binding 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:                                RENTAL SERVICE CORPORATION

By ______________________              By _________________________________

   Title:                                 Title:

Countersigned:

CHASEMELLON SHAREHOLDER SERVICES, L.L.C., as Rights Agent

By _____________________________
   Authorized Signature



                                      B-3
<PAGE>
 
                  [Form of Reverse Side of Right Certificate]

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

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

FOR VALUE RECEIVED _____________________________________________________________

hereby sells, assigns and transfers unto _______________________________________

________________________________________________________________________________

________________________________________________________________________________

                        (Please print name and address
                                of transferee)

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

Dated:  ________________


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

Signature Guaranteed:

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

          Signatures must be guaranteed by an "eligible guarantor institution"
as defined in Rule 17Ad-15 promulgated under the Securities Exchange Act of
1934, as amended.




                                      B-4
<PAGE>
 
________________________________________________________________________________

The undersigned hereby certifies that:

          (1)  the Rights evidenced by this Right Certificate are not
beneficially owned by and are not being assigned to an Acquiring Person or an
Affiliate or an Associate thereof; and

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

Dated:  __________________

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




                                      B-5
<PAGE>
 
                         FORM OF ELECTION TO PURCHASE
                         ----------------------------

                     (To be executed if holder desires to
                       exercise the Right Certificate.)

To:  Rental Service Corporation

          The undersigned hereby irrevocably elects to exercise ________________
Rights represented by this Right Certificate to purchase the Preferred Shares
issuable upon the exercise of such Rights (or such other securities or property
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:

________________________________________________________
(Please print name and address)

________________________________________________________

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

Please insert social security
or other identifying number

________________________________________________________
            (Please print name and address)

________________________________________________________

Dated: __________________

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

Signature Guaranteed:

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

          Signatures must be guaranteed by an "eligible guarantor institution"
as defined in Rule 17Ad-15 promulgated under the Securities Exchange Act of
1934, as amended.




                                      B-6
<PAGE>
 
The undersigned hereby certifies that:

          (1)  the Rights evidenced by this Right Certificate are not
beneficially owned by and are not being assigned to an Acquiring Person or an
Affiliate or an Associate thereof; and

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

Dated:_______________

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


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

                                     NOTICE
                                     ------

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

          In the event the certification set forth above in the Form of
Assignment or Form of Election to Purchase is not completed, the Company will
deem the beneficial owner of the Rights evidenced by this Right Certificate to
be an Acquiring Person or an Affiliate or Associate hereof and such Assignment
or Election to Purchase will not be honored.




                                      B-7
<PAGE>
 
                                                                       EXHIBIT C
                                                                       ---------

            As described in the Rights Agreement, Rights which are
             -------------------------------------------------------
         held by or have been held by an Acquiring Person or Associates
         --------------------------------------------------------------
     or Affiliates thereof (as defined in the Rights Agreement) and certain
     ----------------------------------------------------------------------
     transferees thereof shall become null and void and will no longer be 
     --------------------------------------------------------------------
                                 transferable.
                                 -------------

                         SUMMARY OF RIGHTS TO PURCHASE
                               PREFERRED SHARES

          On April 15, 1999 the Board of Directors of Rental Service Corporation
(the "Company") declared a dividend of one preferred share purchase right (a
"Right") for each share of common stock, $.01 par value (the "Common Shares"),
of the Company outstanding at the Close of Business on April 30, 1999 (the
"Record Date"). As long as the Rights are attached to the Common Shares, the
Company will issue one Right (subject to adjustment) with each new Common Share
so that all such shares will have attached Rights. When exercisable, each Right
will entitle the registered holder to purchase from the Company one one-
thousandth of a share of Series A Junior Participating Preferred Stock (the
"Preferred Shares") at a price of $150.00 per one one-thousandth of a Preferred
Share, subject to adjustment (the "Purchase Price"). The description and terms
of the Rights are set forth in a Rights Agreement, dated as of April 16, 1999,
as the same may be amended from time to time (the "Agreement"), between the
Company and ChaseMellon Shareholder Services, L.L.C., as Rights Agent (the
"Rights Agent").

          Until the earlier to occur of (i) ten (10) days following a public
announcement that a person or group of affiliated or associated persons has
acquired, or obtained the right to acquire, beneficial ownership of 10% or more
of the Common Shares (an "Acquiring Person") or (ii) the occurrence of the tenth
business day (or such later date as may be determined by action of the Board of
Directors prior to such time as any person or group of affiliated persons
becomes an Acquiring Person) following the commencement or announcement of an
intention to make a tender offer or exchange offer the consummation of which
would result in the beneficial ownership by a person or group of 10% or more of
the Common Shares (the earlier of (i) and (ii) being called the "Distribution
Date"), the Rights will be evidenced, with respect to any of the Common Share
certificates outstanding as of the Record Date, by such Common Share certificate
together with a copy of this Summary of Rights. Notwithstanding the foregoing,
no Person who is or shall become the Beneficial Owner of 10% or more of the
Common Shares of the Company then outstanding shall be an "Acquiring Person"
solely as the result of any one or more of the following: (i) an acquisition of
Common Shares by the Company which, by reducing the number of shares
outstanding, increases the proportionate number of shares beneficially owned by
such Person to 10% or more of the Common Shares of the Company then outstanding;
(ii) the holding or acquisition by NationsRent (or any officer, director,
Affiliate or Associate of NationsRent) of Beneficial Ownership of Common Shares
of the Company pursuant to the grant by the Company to NationsRent of the Stock
Option Agreement or the issuance of Common Shares of the Company to NationsRent
under the Stock Option Agreement; (iii) the acquisition by any Person of
Beneficial Ownership of Common Shares of the Company issued or to be issued
pursuant to Merger Agreement or (iv) the acquisition by any director or officer
of NationsRent or any Person who may be deemed an Affiliate or an Associate of
NationsRent of Beneficial Ownership of Common Shares of the Company issued or
the issuance of Common Shares of the Company pursuant to NationsRent Options (as
defined in the Agreement) under the terms of the Merger Agreement until, in the
case of each of clauses (i) through (iv), such time after the date hereof as any
of such Persons shall become the Beneficial Owner (other than pursuant to a
dividend or distribution paid or made by the Company on the outstanding Common
Shares of the Company or pursuant to a split or subdivision of the outstanding
Common Shares) of any additional Common Shares (other than any such additional
Common Shares acquired in a transaction which is the subject of any of the
exceptions described in the foregoing clauses (ii) through (iv)) and shall 
thereby become the Beneficial Owner of 10% or more of the Common Shares of the
Company then outstanding (other than as a consequence of clause (i)).

                                      C-1
<PAGE>

          The Agreement provides that until the Distribution Date (or earlier
redemption exchange, termination, or expiration of the Rights), the Rights will
be transferred with and only with the Common Shares. Until the Distribution Date
(or earlier redemption or expiration of the Rights), new Common Share
certificates issued after the Close of Business on the Record Date upon transfer
or new issuance of the Common Shares will contain a notation incorporating the
Agreement by reference. Until the Distribution Date (or earlier redemption,
exchange, termination or expiration of the Rights), the surrender for transfer
of any certificates for Common Shares, with or without such notation or a copy
of this Summary of Rights, will also constitute the transfer of the Rights
associated with the Common Shares represented by such certificate. As soon as
practicable following the Distribution Date, separate certificates evidencing
the Rights ("Right Certificates") will be mailed to holders of record of the
Common Shares as of the Close of Business on the Distribution Date and such
separate Right Certificates alone will evidence the Rights.

          The Rights are not exercisable until the Distribution Date. The Rights
will expire on April 16, 2009, subject to the Company's right to extend such
date (the "Final Expiration Date"), unless earlier redeemed or exchanged by the
Company or terminated. The Rights will be deemed to be terminated, among other
things, upon the 60th day following the date of the termination of the Merger
Agreement or upon the 60th day following the closing of any merger or other 
acquisition transaction involving the Company pursuant to certain types of 
agreements, unless extended.


                                      C-2
<PAGE>
 
          Each Preferred Share purchasable upon exercise of the Rights will be
entitled, when, as and if declared, to a minimum preferential quarterly dividend
payment of $1.00 per share but will be entitled to an aggregate dividend of
1,000 times the dividend, if any, declared per Common Share. In the event of
liquidation, dissolution or winding up of the Company, the holders of the
Preferred Shares will be entitled to a minimum preferential liquidation payment
of $1,000 per share (plus any accrued but unpaid dividends) but will be entitled
to an aggregate payment of 1,000 times the payment made per Common Share. Each
Preferred Share will have 1,000 votes and will vote together with the Common
Shares. Finally, in the event of any merger, consolidation or other transaction
in which Common Shares are exchanged, each Preferred Share will be entitled to
receive 1,000 times the amount received per Common Share. Preferred Shares will
not be redeemable. These rights are protected by customary antidilution
provisions. Because of the nature of a Preferred Share's dividend, liquidation
and voting rights, the value of one one-thousandth of a Preferred Share
purchasable upon exercise of each Right should approximate the value of one
Common Share.

          The Purchase Price payable, and the number of Preferred Shares 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
Shares, (ii) upon the grant to holders of the Preferred Shares of certain rights
or warrants to subscribe for or purchase Preferred Shares or convertible
securities at less than the current market price of the Preferred Shares or
(iii) upon the distribution to holders of the Preferred Shares of evidences of
indebtedness, cash, securities or assets (excluding regular periodic cash
dividends at a rate not in excess of 125% of the rate of the last regular
periodic cash dividend theretofore paid or, in case regular periodic cash
dividends have not theretofore been paid, at a rate not in excess of 50% of the
average net income per share of the Company for the four quarters ended
immediately prior to the payment of such dividend, or dividends payable in
Preferred Shares (which dividends will be subject to the adjustment described in
clause (i) above)) or of subscription rights or warrants (other than those
referred to above).

          In the event that a Person becomes an Acquiring Person or if the
Company were the surviving corporation in a merger with an Acquiring Person or
any affiliate or associate of an Acquiring Person and the Common Shares were not
changed or exchanged, each holder of a Right, other than Rights that are or were
acquired or beneficially owned by the Acquiring Person (which Rights will
thereafter be void), will thereafter have the right to receive upon exercise
that number of Common Shares having a market value of two times the then current
Purchase Price of the Right. In the event that, after a person has become an
Acquiring Person, the Company were acquired in a merger or other business
combination transaction or more than 50% of its assets or earning power were
sold, proper provision shall be made so that each holder of a Right shall
thereafter have the right to receive, upon the exercise thereof at the then
current Purchase Price of the Right, that number of shares of common stock of
the acquiring company which at the time of such transaction would have a market
value of two times the then current Purchase Price of the Right.


                                      C-3
<PAGE>
 
          At any time after a Person becomes an Acquiring Person and prior to
the earlier of one of the events described in the last sentence of the previous
paragraph or the acquisition by such Acquiring Person of 50% or more of the
outstanding Common Shares, the Board of Directors may cause the Company to
exchange the Rights (other than Rights owned by an Acquiring Person which will
have become void), in whole or in part, for Common Shares at an exchange rate of
that number of Common Shares having an aggregate value equal to the Spread (as
defined in the Agreement) (with such value being based on the current per share
market price (as determined pursuant to Section 11.4 of the Agreement) on the
date of the occurrence of a Trigger Event (as defined in the Agreement) per
Right (subject to adjustment).

          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 Preferred Shares or Common Shares will be issued (other than
fractions of Preferred Shares which are integral multiples of one one-thousandth
of a Preferred Share, which may, at the election of the Company, be evidenced by
depository receipts), and in lieu thereof, a payment in cash will be made based
on the market price of the Preferred Shares or Common Shares on the last trading
date prior to the date of exercise.

          The Rights may be redeemed in whole, but not in part, at a price of
$.01 per Right (the "Redemption Price") by the Board of Directors at any time
prior to the time that an Acquiring Person has become such. The redemption of
the Rights may be made effective at such time, on such basis and with such
conditions as the Board of Directors in its sole discretion may establish.
Immediately upon any redemption of the Rights, the right to exercise 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 beyond those as an existing stockholder,
including, without limitation, the right to vote or to receive dividends.

          Any of the provisions of the Agreement may be amended by the Board of
Directors of the Company for so long as the Rights are then redeemable, and
after the Rights are no longer redeemable, the Company may amend or supplement
the Agreement in any manner that does not adversely affect the interests of the
holders of the Rights.

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



                                      C-4


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