DATUM INC
8-A12G, 1999-11-12
INSTRUMENTS FOR MEAS & TESTING OF ELECTRICITY & ELEC SIGNALS
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<PAGE>   1

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 8-A

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


                                   DATUM INC.
             (Exact name of registrant as specified in its charter)


                Delaware                                 95-2512237
- ----------------------------------------    ------------------------------------
(State of incorporation or organization)    (I.R.S. Employer Identification No.)

  9975 Toledo Way, Irvine, California                      92618
- ----------------------------------------                ----------
(Address of principal executive offices)                (Zip Code)


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

         Title of each class               Name of each exchange on which
         to be so registered               each class is to be registered
         -------------------               ------------------------------

                  None                              Not Applicable


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

        Rights to Purchase Series A Junior Participating Preferred Stock
        ----------------------------------------------------------------
                                (Title of Class)


Exhibit Index on Page 5                                        Page 1 of 5 Pages

<PAGE>   2

Item 1.           Description of Registrant's Securities to be Registered.

                  On November 8, 1999, the Board of Directors of Datum Inc. (the
"Corporation") approved the adoption of a Rights Plan and declared a dividend
distribution of one Right for each outstanding share of the Corporation's Common
Stock to stockholders of record on the close of business on November 22, 1999
(the "Dividend Date"). Each Right entitles the registered holder to purchase
from the Corporation a unit consisting of one one-hundredth of a share (a
"Unit") of Series A Junior Participating Preferred Stock, par value $0.25 per
share (the "Preferred Stock"), at a purchase price of $48 per Unit, subject to
adjustment. The description and terms of the Rights are set forth in a Rights
Agreement (the "Rights Agreement") between the Corporation and ChaseMellon
Shareholder Services, L.L.C., as Rights Agent.

                  CERTIFICATES. Initially, the Rights will be attached to all
Common Stock certificates representing shares then outstanding, and no separate
Rights Certificates will be distributed. Subject to extension by the Board of
Directors in certain circumstances, the Rights will separate from the Common
Stock and a distribution date (the "Distribution Date") will occur upon the
earlier of (i) ten (10) days following a public announcement that a person or
group of affiliated or associated persons (an "Acquiring Person") has acquired,
or obtained the right to acquire, beneficial ownership of fifteen percent (15%)
or more of the outstanding shares of Common Stock (the "Stock Acquisition
Date"); or (ii) ten (10) business days following the commencement of a tender
offer or exchange offer that would result in a person or group beneficially
owning fifteen percent (15%) or more of the outstanding shares of Common Stock.
Until the Distribution Date, (i) the Rights will be evidenced by the Common
Stock certificates and will be transferred with and only with such Common Stock
certificates; (ii) new Common Stock certificates issued will contain a notation
incorporating the Rights Agreement by reference; and (iii) the surrender for
transfer of any certificates for Common Stock outstanding will also constitute
the transfer of the Rights associated with the Common Stock represented by such
certificate.

                  EXPIRATION AND EXERCISE. The Rights are not exercisable until
the Distribution Date and will expire at the close of business on November 22,
2009, unless earlier redeemed by the Corporation as described below.

                  As soon as practicable after the Distribution Date, Rights
Certificates will be mailed to holders of record of the Common Stock as of the
close of business on the Distribution Date and, thereafter, the separate Rights
Certificates will represent the Rights. Except as otherwise determined by the
Board of Directors, only shares of Common Stock issued prior to the Distribution
Date will be issued with Rights.

                  "FLIP-IN". In the event that, at any time following the
Dividend Date, (i) the Corporation is the surviving corporation in a merger with
an Acquiring Person and its Common Stock is not changed or exchanged; (ii) an
Acquiring Person becomes the beneficial owner of more than fifteen percent (15%)
of the outstanding shares of Common Stock; (iii) an Acquiring Person engages in
one or more "self-dealing" transactions as set forth in the Rights Agreement; or
(iv) during such time as there is an Acquiring Person, an event occurs which
results in such Acquiring Person's ownership interest being increased by more
than one-half of one percent (.50%) (e.g., a reverse stock split), each holder
of a Right will thereafter have the right to receive, upon exercise, Common
Stock (or, in certain circumstances, cash, property or other securities of the
Corporation) having a value equal to two times the exercise price of the Right.
Notwithstanding any of the foregoing, following the occurrence of any of the
events set forth in this paragraph, all Rights


                                       2
<PAGE>   3

that are, or (under certain circumstances specified in the Rights Agreement)
were, beneficially owned by any Acquiring Person will be null and void. However,
Rights are not exercisable following the occurrence of any of the events set
forth above until such time as the Rights are no longer redeemable by the
Corporation as set forth below.

                  For example, at an exercise price of $48 per Right, each Right
not owned by an Acquiring Person (or by certain related parties) following an
event set forth in the preceding paragraph would entitle its holder to purchase
$96 worth of Common Stock (or other consideration, as noted above) for $48.
Assuming that the Common Stock had a per share value of $8 at such time, the
holder of each valid Right would be entitled to purchase twelve shares of Common
Stock for $48.

                  PERMITTED OFFER. A tender or exchange offer for all
outstanding Common Stock at a price and on terms determined by the Board of
Directors prior to the purchase to be adequate and in the best interests of the
Corporation and its stockholders (other than the Acquiring Person) is a
Permitted Offer under the Rights Agreement. A Permitted Offer does not trigger
the exercisability of the Rights.

                  "FLIP-OVER". In the event that, at any time following the
Stock Acquisition Date, (i) the Corporation is acquired in a merger or other
business combination transaction in which the Corporation is not the surviving
corporation; or (ii) 50% or more of the Corporation's assets or earning power is
sold or transferred, each holder of a Right (except Rights which previously have
been voided as set forth above) shall thereafter have the right to receive, upon
exercise, common stock of the acquiring company having a value equal to two
times the exercise price of the Right. The events set forth in this paragraph
and in the second preceding paragraph are referred to as the "Triggering
Events."

                  EXCHANGE FEATURE. At any time after any Person becomes an
Acquiring Person and prior to the acquisition by such person or group of 50% or
more of the outstanding Common Stock, the Board of Directors may exchange the
Rights (other than Rights owned by such Person or group which will have become
void), in whole or in part, at an exchange rate of one share of Common Stock (or
a combination of cash, property, Common Stock or other securities having an
equal value) per Right (subject to adjustment).

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

                  With certain exceptions, no adjustment in the purchase price
will be required until cumulative adjustments amount to at least 1% of the
purchase price. No fractional Units will be issued and, in lieu thereof, an
adjustment in cash will be made based on the market price of the Preferred Stock
on the last trading date prior to the date of exercise.

                  REDEMPTION. At any time until ten days following the Stock
Acquisition Date, the Corporation may redeem the Rights in whole, but not in
part, at a price of $0.01 per Right. After the


                                       3
<PAGE>   4

redemption period has expired, the Corporation's right of redemption may be
reinstated if an Acquiring Person reduces his beneficial ownership to less than
fifteen percent (15%) of the outstanding shares of the Common Stock in a
transaction or series of transactions not involving the Corporation. Immediately
upon the action of the Board of Directors ordering redemption of the Rights, the
Rights will terminate and the only right of the holders of Rights will be to
receive the $0.01 redemption price. Rights are not exercisable while subject to
redemption.

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

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

Item 2.           Exhibits

                  Rights Agreement, dated as of November 8, 1999, between Datum
                  Inc. and ChaseMellon Shareholder Services, L.L.C., which
                  includes as Exhibit A thereto a form of Certificate of
                  Designation for the Preferred Stock, as Exhibit B thereto the
                  Form of Rights Certificate and as Exhibit C thereto a Summary
                  of Terms of Stockholder Rights Plan. Rights Certificates will
                  not be mailed until after the Distribution Date (as that term
                  is defined in the Rights Agreement).


                                    SIGNATURE

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


Date:  November 12, 1999                     DATUM INC.

                                                    /s/ DAVID A. YOUNG
                                             -----------------------------------
                                             By:    David A. Young
                                             Title: Chief Financial Officer


                                       4
<PAGE>   5

                                  EXHIBIT INDEX

<TABLE>
<CAPTION>
                                                                        Sequential
Exhibit No.                           Description                        Page No.
- -----------                           -----------                       ----------
<C>             <S>                                                     <C>
     1          Rights Agreement, dated as of November 8, 1999,
                between Datum Inc. and ChaseMellon Shareholder
                Services, L.L.C., which includes as Exhibit A thereto a
                form of Certificate of Designation for the Preferred
                Stock, as Exhibit B thereto the Form of Rights
                Certificate and as Exhibit C thereto a Summary of
                Terms of Stockholder Rights Plan.
</TABLE>


                                       5

<PAGE>   1

                                                                       EXHIBIT 1


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

                                   DATUM INC.

                                       and

                    CHASEMELLON SHAREHOLDER SERVICES, L.L.C.

                                  Rights Agent


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


                                Rights Agreement
                          Dated as of November 8, 1999


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

<PAGE>   2
                               TABLE OF CONTENTS

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

EXHIBITS

Exhibit A         Form of Certificate of Designation, Preferences and Rights
Exhibit B         Form of Rights Certificate
Exhibit C         Summary of Terms
</TABLE>
<PAGE>   3

                                RIGHTS AGREEMENT

        RIGHTS AGREEMENT, dated as of November 8, 1999 (the "Agreement"), is
made and entered into by and between Datum Inc., a Delaware corporation (the
"Company"), and ChaseMellon Shareholder Services, L.L.C., a New Jersey limited
liability company (the "Rights Agent").

                              W I T N E S S E T H :

        WHEREAS, on November 8, 1999 (the "Rights Dividend Declaration Date"),
the Board of Directors of the Company authorized and declared a dividend
distribution of one Right for each share of Common Stock, par value $.25 per
share, of the Company outstanding at the Close of Business on November 22, 1999
(the "Record Date"), and has authorized the issuance of one Right (as such
number may hereinafter be adjusted pursuant to the provisions of Section 11(p)
hereof) for each share of Common Stock of the Company issued between the Record
Date (whether originally issued or delivered from the Company's treasury) and
the Distribution Date (as defined in Section 3 hereof), each Right initially
representing the right to purchase one one-hundredth of a share of Series A
Junior Participating Preferred Stock of the Company, $0.25 par value, having the
rights, powers and preferences set forth in the form of Certificate of
Designation, Preferences and Rights attached hereto as Exhibit A, upon the terms
and subject to the conditions hereinafter set forth (the "Rights");

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

        SECTION 1. CERTAIN DEFINITIONS. For purposes of this Agreement, the
following terms have the meanings indicated:

                   (a) "Acquiring Person" shall mean any Person who or which,
together with all Affiliates and Associates of such Person, shall be the
Beneficial Owner of fifteen percent (15%) or more of the shares of Common Stock
then outstanding, but shall not include the Company, any Subsidiary of the
Company, any employee benefit plan of the Company or of any Subsidiary of the
Company, or any Person or entity organized, appointed or established by the
Company for or pursuant to the terms of any such plan. In addition,
notwithstanding the foregoing, no Person shall be deemed to be an Acquiring
Person if (i) the Board of Directors of the Company determines in good faith
that a person who would otherwise be an "Acquiring Person," but for the
operation of this clause (i), has become such inadvertently, and such person
divests as promptly as practical a sufficient number of shares of Common Stock
so that such person would no longer be an "Acquiring Person," (ii) as the result
of an acquisition of Common Stock by the Company which, by reducing the number
of shares outstanding, increases the proportionate number of shares beneficially
owned by such Person to fifteen percent (15%) or more of the Common Stock of the
Company then outstanding; provided, however, that if a Person shall become the
Beneficial Owner of fifteen percent (15%) or more of the Common Stock of the
Company then outstanding by reason of share purchases by the Company and shall,
after such share purchases by the Company, become the Beneficial Owner (other
than by way of a stock dividend or stock split) of additional shares of Common
Stock representing one-half of one percent (.50%) of the then outstanding shares
of Common Stock of the Company, then such Person shall be deemed to be an
Acquiring Person, or (iii) a Person enters into an agreement or transaction or
understanding with the Company whereby, solely as a consequence of that
agreement or transaction or understanding, such Person would become an
"Acquiring Person" (but for the operation of this clause (iii)), and such
agreement, transaction or understanding is approved by the Board of Directors of
the Company; provided, however, that if such Person subsequently becomes the
Beneficial Owner of any additional shares of Common Stock in a manner not
specifically approved by a majority of the Board of Directors, such Person shall
be deemed to be an Acquiring Person.


                                       1


<PAGE>   4

                   (b) "Affiliate" and "Associate" shall have the respective
meanings ascribed to such terms in Rule 12b-2 of the General Rules and
Regulations under the Securities Exchange Act of 1934 (the "Exchange Act"), as
in effect on the date of this Agreement.

                   (c) 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;

                       (ii) which such Person or any of such Person's Affiliates
         or Associates, directly or indirectly, has the right to acquire
         (whether such right is exercisable immediately or only after the
         passage of time) pursuant to any agreement, arrangement or
         understanding (whether or not in writing) or upon the exercise of
         conversion rights, exchange rights, rights, warrants or options, or
         otherwise; provided, however, that a Person shall not be deemed the
         "Beneficial Owner" of, or to "beneficially own," (A) securities
         tendered pursuant to a tender or exchange offer made by such person or
         any of such Person's Affiliates or Associates until such tendered
         securities are accepted for purchase or exchange, or (B) securities
         which a Person or any of such Person's Affiliates or Associates 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 its Affiliates or Associates) if such agreement has been
         approved by the Board of Directors of the Company prior to there being
         an Acquiring Person, or (C) securities issuable upon exercise of Rights
         at any time prior to the occurrence of a Triggering Event, or (D)
         securities issuable upon exercise of Rights from and after the
         occurrence of a Triggering Event which Rights were acquired by such
         Person or any of such Person's Affiliates or Associates prior to the
         Distribution Date or pursuant to Section 3(a) or Section 22 hereof (the
         "Original Rights") or pursuant to Section 11(i) hereof in connection
         with an adjustment made with respect to any Original Rights;

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

                       (iv) which are beneficially owned, directly or
         indirectly, by any other Person (or any Affiliate or Associate thereof)
         with which such Person (or any of such Person's Affiliates or
         Associates) has any agreement, arrangement or understanding (whether


                                       2


<PAGE>   5

         or not in writing), for the purpose of acquiring, holding, voting
         (except pursuant to a revocable proxy as described in the proviso to
         subparagraph (iii) of this paragraph (c)) or disposing of any voting
         securities of the Company; provided, however, that nothing in this
         paragraph (c) shall cause a person engaged in business as an
         underwriter of securities to be the "Beneficial Owner" of, or to
         "beneficially own," any securities acquired through such person's
         participation in good faith in a firm commitment underwriting until the
         expiration of forty days after the date of such acquisition; and
         provided further, however, that in no case shall an officer or director
         of the Company be deemed (x) the Beneficial Owner of any securities
         beneficially owned by another officer or director of the Company solely
         by reason of actions undertaken by such persons in their capacity as
         officers or directors of the Company or (y) the Beneficial Owner of
         securities held of record by the trustee of any employee benefit plan
         of the Company or any Subsidiary of the Company for the benefit of any
         employee of the Company or any Subsidiary of the Company, other than
         the officer or director, by reason of any influence that such officer
         or director may have over the voting of the securities held in the
         plan.

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

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

                   (f) "Common Stock" shall mean the Common Stock, par value
$0.25 per share, of the Company, except that "Common Stock" when used with
reference to any Person other than the Company shall mean the capital stock of
such Person with the greatest voting power, or the equity securities or other
equity interest having power to control or direct the management, of such
Person.

                   (g) "Expiration Date" shall mean the earliest of (i) the
Close of Business on the Final Expiration Date, (ii) the time at which the
Rights are redeemed as provided in Section 23 hereof, (iii) the time at which
the Board of Directors orders the exchange of the Rights as provided in Section
24 hereof, or (iv) the consummation of a transaction contemplated by Section
13(d) hereof.

                   (h) "Final Expiration Date" shall mean November 22, 2009.

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

                   (j) "Permitted Offer" shall mean a tender offer for all
outstanding Common Stock made in the manner prescribed by Section 14(d) of the
Exchange Act and the rules and regulations promulgated thereunder; provided,
however, a majority of the Board of Directors then in office has determined that
the offer is both adequate and otherwise in the best interests of the Company
and its stockholders (taking into account all factors that the Board of
Directors deems relevant, including, without limitation, prices that could
reasonably be achieved if the Company or its assets were sold on an orderly
basis designed to realize maximum value).


                                       3


<PAGE>   6

                   (k) "Preferred Stock" shall mean shares of Series A Junior
Participating Preferred Stock, $0.25 per share par value, of the Company, having
the rights and preferences set forth in the form of Certificate of Designation,
Preferences and Rights attached hereto as Exhibit A.

                   (l) "Section 11(a)(ii) Event" shall mean any event described
in Section 11(a)(ii) (A), (B) or (C) hereof.

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

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

                   (o) "Subsidiary" shall mean, with reference to any Person,
any corporation of which an amount of voting securities sufficient to elect at
least a majority of the directors of such corporation is beneficially owned,
directly or indirectly, by such Person, or otherwise controlled by such person.

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

         SECTION 2. APPOINTMENT OF RIGHTS AGENT. The Company hereby appoints the
Rights Agent to act as agent for the Company in accordance with the terms and
conditions hereof, and the Rights Agent hereby accepts such appointment. The
Company may from time to time appoint such Co-Rights Agents as it may deem
necessary or desirable.

         SECTION 3. ISSUANCE OF RIGHTS CERTIFICATES.

                    (a) Until the earlier of (i) the Close of Business on the
tenth day (or such later date as may be determined by action of a majority of
the Board of Directors) after the Stock Acquisition Date (or, if the tenth day
after the Stock Acquisition Date occurs before the Record Date, the Close of
Business on the Record Date), or (ii) the Close of Business on the tenth
Business Day (or such later date as may be determined by action of a majority of
the Board of Directors then in office) after the date that a tender or exchange
offer by any Person (other than the Company, any Subsidiary of the Company, any
employee benefit plan of the Company or of any Subsidiary of the Company, or any
Person or entity organized, appointed or established by the Company for or
pursuant to the terms of any such plan) is first published or sent or given
within the meaning of Rule 14d-2(a) of the General Rules and Regulations under
the Exchange Act, if upon consummation thereof, such Person would be the
Beneficial Owner of fifteen percent (15%) or more of the shares of Common Stock
then outstanding (the earlier of (i) and (ii) being herein referred to as the
"Distribution Date"), (x) the Rights will be evidenced (subject to the
provisions of paragraph (b) of this Section 3) by the certificates for the
Common Stock registered in the names of the holders of the Common Stock (which
certificates for Common Stock shall be deemed also to be certificates for
Rights) and not by separate certificates, and (y) the Rights will be
transferable only in connection with the transfer of the underlying shares of
Common Stock (including a transfer to the Company).


                                       4
<PAGE>   7
As soon as practicable after the Distribution Date, the Rights Agent will send
by first-class, insured, postage prepaid mail, to each record holder of the
Common Stock as of the Close of Business on the Distribution Date, at the
address of such holder shown on the records of the Company, one or more rights
certificates, in substantially the form of Exhibit B hereto (the "Rights
Certificates"), evidencing one Right for each share of Common Stock so held,
subject to adjustment as provided herein. In the event that an adjustment in the
number of Rights per share of Common Stock has been made pursuant to Section
11(p) hereof, at the time of distribution of the Rights Certificates, the
Company shall make the necessary and appropriate rounding adjustments (in
accordance with Section 14(a) hereof) so that Rights Certificates representing
only whole numbers of Rights are distributed and cash is paid in lieu of any
fractional Rights. As of and after the Distribution Date, the Rights will be
evidenced solely by such Rights Certificates and may be transferred by the
transfer of the Rights Certificates as permitted hereby, separately and apart
from any transfer of one or more Common Stock, and the holders of such Rights
Certificates as listed in the records of the Company or any transfer agent or
registrar for the Rights shall be the record holders thereof.

                    (b) As promptly as practicable following the Record Date,
the Company will send a copy of a Summary of Rights, in substantially the form
attached hereto as Exhibit C (the "Summary of Rights"), by first-class, postage
prepaid mail, to each record holder of the Common Stock as of the Close of
Business on the Record Date, at the address of such holder shown on the records
of the Company. With respect to certificates for the Common Stock outstanding as
of the Record Date, until the Distribution Date, the registered holders of the
Common Stock shall also be the registered holders of the associated Rights.
Until the earlier of the Distribution Date or the Expiration Date, the transfer
of any certificates representing shares of Common Stock in respect of which
Rights have been issued shall also constitute the transfer of the Rights
associated with such shares of Common Stock.

                    (c) Unless the Board of Directors by resolution adopted at
or before the time of the issuance (including pursuant to the exercise of rights
under the Company's benefit plans) of any Common Stock specifies to the
contrary, Rights shall be issued in respect of all shares of Common Stock which
are issued after the Record Date but prior to the earlier of the Distribution
Date or the Expiration Date. Certificates representing such shares of Common
Stock shall also be deemed to be certificates for Rights, and shall bear the
following legend:

                    This certificate also evidences and entitles the holder
         hereof to certain Rights as set forth in the Rights Agreement between
         Datum Inc., a Delaware corporation (the "Company") and ChaseMellon
         Shareholder Services, L.L.C. (the "Rights Agent"), dated as of November
         8, 1999 (the "Rights Agreement"), the terms of which are hereby
         incorporated herein by reference and a copy of which is on file at the
         principal offices of the Company. Under certain circumstances, as set
         forth in the Rights Agreement, such Rights will be evidenced by
         separate certificates and will no longer be evidenced by this
         certificate. The Company will mail to the holder of this certificate a
         copy of the Rights Agreement, as in effect on the date of mailing,
         without charge promptly after receipt of a written request therefor.
         Under certain circumstances set forth in the Rights Agreement, Rights
         issued to, or held by, any Person who is, was or becomes an Acquiring
         Person or any Affiliate or Associate thereof (as such terms are defined
         in the Rights Agreement), whether currently held by or on behalf of
         such Person or by any subsequent holder, may become null and void.


                                       5


<PAGE>   8

With respect to such certificates containing the foregoing legend, until the
earlier of (i) the Distribution Date or (ii) the Expiration Date, the Rights
associated with the Common Stock represented by such certificates shall be
evidenced by such certificates alone and registered holders of Common Stock
shall also be the registered holders of the associated Rights, and the transfer
of any of such certificates shall also constitute the transfer of the Rights
associated with the Common Stock represented by such certificates. In the event
that the Company purchases or acquires any Common Stock after the Record Date
but prior to the Distribution Date, any Rights associated with such Common Stock
shall be deemed cancelled and retired so that the Company shall not be entitled
to exercise any Rights associated with the Common Stock which are no longer
outstanding.

         SECTION 4. FORM OF RIGHTS CERTIFICATES.

                    (a) The Rights Certificates (and the forms of election to
purchase and of assignment to be printed on the reverse thereof) shall each be
substantially in the form set forth in 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 on which the Rights may from time to
time be listed, or to conform to usage. Subject to the provisions of Section 11
and Section 22 hereof, the Rights Certificates, whenever distributed, shall be
dated as of the Record Date and on their face shall entitle the holders thereof
to purchase such number of one one-hundredths of a share of Preferred Stock as
shall be set forth therein at the price set forth therein (such exercise price
per one one-hundredth of a share, the "Purchase Price"), but the amount and type
of securities purchasable upon the exercise of each Right and the Purchase Price
thereof shall be subject to adjustment as provided herein.

                    (b) Any Rights Certificate issued pursuant to Section 3(a)
or Section 22 hereof that represents Rights beneficially owned by: (i) an
Acquiring Person or any Associate or Affiliate of an Acquiring Person, (ii) a
transferee of an Acquiring Person (or of any such Associate or Affiliate) who
becomes a transferee after the Acquiring Person becomes such, or (iii) a
transferee of an Acquiring Person (or of any such Associate or Affiliate) who
becomes a transferee prior to or concurrently with the Acquiring Person becoming
such and receives such Rights pursuant to either (A) a transfer (whether or not
for consideration) from the Acquiring Person to holders of equity interests in
such Acquiring Person or to any Person with whom such Acquiring Person has any
continuing agreement, arrangement or understanding regarding the transferred
Rights or (B) a transfer which the Board of Directors of the Company has
determined is part of an agreement, arrangement or understanding which has as a
primary purpose or effect avoidance of Section 7(e) hereof, and provided that
the Company shall have notified the Rights Agent that this Section 4(b) applies
in writing, and any Rights Certificate issued pursuant to Section 6 or Section
11 hereof upon transfer, exchange, replacement or adjustment of any other Rights
Certificate referred to in this sentence, shall contain (to the extent feasible)
the following legend:

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


                                       6


<PAGE>   9

         SECTION 5. COUNTERSIGNATURE AND REGISTRATION.

                    (a) The Rights Certificates shall be executed on behalf of
the Company by its Chairman of the Board, its 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 an Assistant Secretary of the Company, either manually or by facsimile
signature. The Rights Certificates shall be manually countersigned by the Rights
Agent and shall not be valid for any purpose unless so countersigned. In case
any officer of the Company who shall have signed any of the Rights Certificates
shall cease to be such officer of the Company before countersignature by the
Rights Agent and issuance and delivery by the Company, such Rights Certificates,
nevertheless, may be countersigned by the Rights Agent and issued and delivered
by the Company with the same force and effect as though the person who signed
such Rights Certificates had not ceased to be such officer of the Company; and
any Rights Certificates may be signed on behalf of the Company by any person
who, at the actual date of the execution of such Rights Certificate, shall be a
proper officer of the Company to sign such Rights Certificate, although at the
date of the execution of this Rights Agreement any such Person was not such an
officer.

                    (b) 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(a), the Rights Agent will keep or cause to be kept, at its principal
office or offices designated pursuant to Section 26 hereof as the appropriate
place for surrender of Rights Certificates upon exercise or transfer, books for
registration and transfer of the Rights Certificates issued hereunder. Such
books shall show the names and addresses of the respective holders of the Rights
Certificates, the number of Rights evidenced on its face by each of the Rights
Certificates, the Rights Certificate number and the date of each of the Rights
Certificates.

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

                    (a) Subject to the provisions of Section 4(b), Section 7(e),
Section 14 and Section 24 hereof, 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 Rights Certificate or Certificates may be transferred, split up,
combined or exchanged for another Rights Certificate or Certificates, entitling
the registered holder to purchase a like number of one one-hundredths of a share
of Preferred Stock (or following a Triggering Event, Common Stock, other
securities, cash or other assets, as the case may be) as the Rights Certificate
or Certificates surrendered then entitled such holder (or former holder in the
case of a transfer) to purchase. Any registered holder desiring to transfer,
split up, combine or exchange any Rights Certificate or Certificates shall make
such request in writing delivered to the Rights Agent, and shall surrender the
Rights Certificate or Certificates to be transferred, split up, combined or
exchanged at the office or offices of the Rights Agent designated for such
purpose. Neither the Rights Agent nor the Company shall be obligated to take any
action whatsoever with respect to the transfer of any such surrendered Rights
Certificate until the registered holder shall have completed and signed the
certificate contained in the form of assignment on the reverse side of such
Rights Certificate and shall have provided such additional evidence of the
identity of the Beneficial Owner (or former Beneficial Owner) or Affiliates or
Associates thereof as the Company or the Rights Agent shall request. Thereupon
the Rights Agent shall, subject to Section 4(b), Section 7(e), Section 14 and
Section 24 hereof, countersign and deliver to the Person entitled thereto a
Rights Certificate or Rights Certificates, as the case may be, as so requested.
The Company may require payment of a sum sufficient to cover any tax or
governmental charge that may be imposed in connection with any transfer, split
up, combination or exchange of Rights Certificates. The Rights Agent shall not
be required to process any transaction in this Section 6 unless and until it has
received written evidence that all taxes and charges have been paid.


                                       7

<PAGE>   10

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

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

                    (a) Subject to Section 7(e) hereof, the registered holder of
any Rights Certificate may exercise the Rights evidenced thereby (except as
otherwise provided herein including, without limitation, the restrictions on
exercisability set forth in Section 9(c), Section 11(a)(iii) and Section 23(a)
hereof) in whole or in part at any time after the Distribution Date upon
surrender of the Rights Certificate, with the form of election to purchase and
the certificate on the reverse side thereof duly executed, to the Rights Agent
at the office or offices of the Rights Agent designated for such purpose,
together with payment of the aggregate Purchase Price with respect to the total
number of one one-hundredths of a share (or other securities or property, as the
case may be) as to which such surrendered Rights are then exercisable, at or
prior to the Expiration Date.

                    (b) The purchase price for each one one-hundredth of a share
of Preferred Stock pursuant to the exercise of a Right (the "Purchase Price")
shall initially be Forty Eight Dollars ($48), and shall be subject to adjustment
from time to time as provided in Section 11 hereof and shall be payable in
accordance with paragraph (c) below.

                    (c) Upon receipt of a Rights Certificate representing
exercisable Rights, with the form of election to purchase and the certificate
duly executed, accompanied by payment, with respect to each Right so exercised,
of the Purchase Price per one one-hundredth of a share of Preferred Stock (or
other shares, securities or property, as the case may be) to be purchased as set
forth below and an amount equal to any applicable tax or governmental charge,
the Rights Agent shall, subject to Section 20(k) hereof, thereupon promptly (i)
(A) requisition from any transfer agent of the shares of Preferred Stock (or
make available, if the Rights Agent is the transfer agent for such shares)
certificates for the total number of one one-hundredths of a share of Preferred
Stock to be purchased and the Company hereby irrevocably authorizes its transfer
agent to comply with all such requests, or (B) if the Company shall have elected
to deposit the total number of shares of Preferred Stock issuable upon exercise
of the Rights hereunder with a depositary agent, requisition from the depositary
agent depositary receipts representing such number of one one-hundredths of a
share of Preferred Stock as are to be purchased (in which case certificates for
the shares of Preferred Stock represented by such receipts shall be deposited by
the transfer agent with the depositary agent) and the Company will direct the
depositary agent to comply with such request, (ii) requisition from the Company
the amount of cash, if any, to be paid in lieu of fractional shares in
accordance with Section 11 hereof, (iii) after receipt of such certificates or
depositary receipts, cause the same to be delivered to or upon the order of the
registered holder of such Rights Certificate, registered in such name or names
as may be designated by such holder, and (iv) after receipt thereof, deliver
such cash, if any, to or upon the order of the registered holder of such Rights
Certificate. The payment of the Purchase Price (as such amount may be reduced
pursuant to Section 11(a)(iii) hereof) may be made (x) in cash or by certified
bank check or money order payable to the order of the Company, or (y) by
delivery of a certificate or certificates (with appropriate stock powers
executed in blank attached thereto) evidencing a number


                                       8

<PAGE>   11
of shares of Common Stock equal to the then Purchase Price divided by the
closing market price (as determined pursuant to Section 11(d) hereof) per share
of Common Stock on the Trading Date immediately preceding the date of such
exercise. In the event that the Company is obligated to issue other securities
(including Common Stock) of the Company, pay cash and/or distribute other
property pursuant to Section 11(a) hereof, the Company will make all
arrangements necessary so that such other securities, cash and/or other property
are available for distribution by the Rights Agent, if and when necessary to
comply with this Agreement.

                    (d) In case the registered holder of any Rights Certificate
shall exercise less than all the Rights evidenced thereby, a new Rights
Certificate evidencing Rights equivalent to the Rights remaining unexercised
shall be issued by the Rights Agent and delivered to, or upon the order of, the
registered holder of such Rights Certificate, registered in such name or names
as may be designated by such holder, subject to the provisions of Section 6 and
Section 14 hereof.

                    (e) Notwithstanding anything in this Agreement to the
contrary, from and after the first occurrence of a Triggering Event, any Rights
beneficially owned by (i) an Acquiring Person or an Associate or Affiliate of an
Acquiring Person, (ii) a transferee of an Acquiring Person (or of any such
Associate or Affiliate) who becomes a transferee after the Acquiring Person
becomes such (a "Post Transferee"), or (iii) a transferee of an Acquiring Person
(or of any such Associate or Affiliate) who becomes a transferee prior to or
concurrently with the Acquiring Person becoming such and receives such Rights
pursuant to either (A) a transfer (whether or not for consideration) from the
Acquiring Person to holders of equity interests in such Acquiring Person or to
any Person with whom the Acquiring Person had 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 an
agreement, arrangement or understanding which has as a primary purpose or effect
the avoidance of this Section 7(e) (a "Prior Transferee"), or (iv) any
subsequent transferee receiving transferred Rights from a Post Transferee or a
Prior Transferee, either directly or through one or more intermediate
transferees, shall become null and void without any further action and no holder
of such Rights shall have any rights whatsoever with respect to such Rights,
whether under any provision of this Agreement or otherwise. The Company shall
notify the Rights Agent in writing when this Section 7(e) applies and shall use
all reasonable efforts to insure that the provisions of this Section 7(e) and
Section 4(b) hereof are complied with, but neither the Company nor the Rights
Agent shall have any liability to any holder of Rights Certificates or other
person as a result of the Company's failure to make any determinations with
respect to an Acquiring Person or its Affiliates, Associates or transferees
hereunder.

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

         SECTION 8. CANCELLATION AND DESTRUCTION OF RIGHTS CERTIFICATES. All
Rights Certificates surrendered for the purpose of exercise, transfer, split up,
combination or exchange shall, if surrendered to the Company or any of its
agents, be delivered to the Rights Agent for cancellation or in cancelled form,
or, if surrendered to the Rights Agent, shall be cancelled by it, and no Rights
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


                                       9

<PAGE>   12

the Rights Agent shall so cancel and retire, any other Rights Certificate
purchased or acquired by the Company otherwise than upon the exercise thereof.
The Rights Agent shall deliver all cancelled Rights Certificates to the Company,
or shall, at the written request of the Company, destroy such cancelled Rights
Certificates, and in such case shall deliver a certificate of destruction
thereof to the Company.

         SECTION 9. RESERVATION AND AVAILABILITY OF CAPITAL STOCK.

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

                    (b) So long as the shares of Preferred Stock (and following
the occurrence of a Triggering Event, Common Stock and/or other securities)
issuable and deliverable upon the exercise of the Rights may be listed on any
stock exchange or the Nasdaq National Market System (the "NMS"), 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 on such
exchange or the NMS upon official notice of issuance upon such exercise.

                    (c) The Company shall use its best efforts to (i) file, as
soon as practicable following the earliest date after the first occurrence of a
Section 11(a)(ii) Event on which the consideration to be delivered by the
Company upon exercise of the Rights has been determined in accordance with
Section 11(a)(iii) hereof, or as soon as is required by law following the
Distribution Date, as the case may be, a registration statement under the
Securities Act of 1933 (the "Act"), with respect to the securities purchasable
upon exercise of the Rights on an appropriate form, (ii) cause such registration
statement to become effective as soon as practicable after such filing, and
(iii) cause such registration statement to remain effective (with a prospectus
at all times meeting the requirements of the Act) until the earlier of (A) the
date as of which the Rights are no longer exercisable for such securities, and
(B) the date of the expiration of the Rights. The Company will also take such
action as may be appropriate under, or to ensure compliance with, the securities
or "blue sky" laws of the various states in connection with the exercisability
of the Rights. The Company may temporarily suspend, for a period of time not to
exceed ninety (90) days after the date set forth in clause (i) of the first
sentence of this Section 9(c), the exercisability of the Rights in order to
prepare and file such registration statement and permit it to become effective.
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. The
Company shall notify the Rights Agent in writing whenever it makes a public
announcement pursuant to this Section 9(c) and give the Rights Agent a copy of
the announcement. 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 (if required) has been declared effective.

                    (d) The Company covenants and agrees that it will take all
such action as may be necessary to ensure that all one one-hundredths of a share
of Preferred Stock (and, following the occurrence of a Triggering Event, Common
Stock and/or other securities) delivered upon exercise of


                                       10


<PAGE>   13

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.

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

         SECTION 10. PREFERRED STOCK RECORD DATE. Each Person in whose name any
certificate for a number of one one-hundredths of a share of Preferred Stock (or
Common Stock and/or other securities, as the case may be) is issued upon the
exercise of Rights shall for all purposes be deemed to have become the holder of
record of such fractional shares of Preferred Stock (or Common Stock and/or
other securities, as the case may be) represented thereby on, and such
certificate shall be dated, the date upon which the Rights Certificate
evidencing such Rights was duly surrendered and payment of the Purchase Price
(and all applicable taxes and governmental charges) was made; provided, however,
that if the date of such surrender and payment is a date upon which the
Preferred Stock (or Common Stock 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 Stock (or Common Stock and/or other securities, as the case may be)
transfer books of the Company are open. Prior to the exercise of the Rights
evidenced thereby, the holder of a Rights Certificate shall not be entitled to
any rights of a stockholder of the Company with respect to shares for which the
Rights shall be exercisable, including, without limitation, the right to vote,
to receive dividends or other distributions or to exercise any preemptive
rights, and shall not be entitled to receive any notice of any proceedings of
the Company, except as provided herein.

         SECTION 11. ADJUSTMENT OF PURCHASE PRICE, NUMBER AND KIND OF SHARES OR
NUMBER OF RIGHTS. The Purchase Price, the number and kind of shares covered by
each Right and the number of Rights outstanding are subject to adjustment from
time to time as provided in this Section 11.

                      (a) (i) In the event the Company shall at any time after
         the date of this Agreement (A) declare a dividend on the Preferred
         Stock payable in shares of Preferred Stock, (B) subdivide the
         outstanding Preferred Stock, (C) combine the outstanding Preferred
         Stock into a smaller number of shares, or (D) issue any shares of its
         capital stock in a reclassification of the Preferred Stock (including
         any such reclassification in connection with a consolidation or merger
         in which the Company is the continuing or surviving corporation),
         except as otherwise provided in this Section 11(a) and Section 7
         hereof, the Purchase Price in effect at the time of the record date for
         such dividend or of the effective date of such subdivision, combination
         or reclassification, and the number and kind of shares of Preferred


                                       11


<PAGE>   14

         Stock or capital stock, as the case may be, issuable on such date,
         shall be proportionately adjusted so that the holder of any Right
         exercised after such time shall be entitled to receive, upon payment of
         the Purchase Price then in effect, the aggregate number and kind of
         shares of Preferred Stock or capital stock, as the case may be, which,
         if such Right had been exercised immediately prior to such date and at
         a time when the Preferred Stock transfer books of the Company were
         open, he would have owned upon such exercise and been entitled to
         receive by virtue of such dividend, subdivision, combination or
         reclassification. If an event occurs which would require an adjustment
         under both this Section 11(a)(i) and Section 11(a)(ii) hereof, the
         adjustment provided for in this Section 11(a)(i) shall be in addition
         to, and shall be made prior to, any adjustment required pursuant to
         Section 11(a)(ii) hereof.

                  (ii) In the event:

                           (A) any Acquiring Person or any Associate or
             Affiliate of any Acquiring Person, at any time after the date of
             this Agreement, directly or indirectly, (1) shall merge into the
             Company or otherwise combine with the Company and the Company shall
             be the continuing or surviving corporation of such merger or
             combination and the Common Stock of the Company shall remain
             outstanding and unchanged, (2) shall, in one transaction or a
             series of transactions, transfer any assets to the Company or to
             any of its Subsidiaries in exchange (in whole or in part) for
             shares of Common Stock, for shares of other equity securities of
             the Company, or for securities exercisable for or convertible into
             shares of equity securities of the Company (Common Stock or
             otherwise) or otherwise obtain from the Company, with or without
             consideration, any additional shares of such equity securities or
             securities exercisable for or convertible into shares of such
             equity securities (other than pursuant to a pro rata distribution
             to all holders of Common Stock), (3) shall sell, purchase, lease,
             exchange, mortgage, pledge, transfer or otherwise acquire or
             dispose of, in the transaction or a series of transactions, to,
             from or with (as the case may be) the Company or any of its
             Subsidiaries, assets on terms and conditions less favorable to
             Company than the Company would be able to obtain in arm's length
             negotiation with an unaffiliated third party, other than pursuant
             to a transaction set forth in Section 13(a) hereof, (4) shall sell,
             purchase, lease, exchange, mortgage, pledge, transfer or otherwise
             acquire or dispose of in one transaction or a series of
             transactions, to, from or with (as the case may be) the Company or
             any of the Company's Subsidiaries (other than incidental to the
             lines of business, if any, engaged in as of the date hereof between
             the Company and such Acquiring Person or Associate or Affiliate)
             assets having an aggregate fair market value of more than
             $5,000,000, other than pursuant to a transaction set forth in
             Section 13(a) hereof, (5) shall receive any compensation from the
             Company or any of the Company's Subsidiaries other than
             compensation for full time employment as a regular employee at
             rates in accordance with the Company's (or its Subsidiaries') past
             practices, or (6) shall receive the benefit, directly or indirectly
             (except proportionately as a stockholder and except if resulting
             from a requirement of law or governmental regulation), of any
             loans, advances, guarantees, pledges or other financial assistance
             or any tax credits or other tax advantage provided by the Company
             or any of its Subsidiaries, or


                                       12


<PAGE>   15

                           (B) any Person shall become an Acquiring Person,
             other than pursuant to any transaction set forth in Section 13(a)
             hereof, or

                           (C) during such time as there is an Acquiring Person,
             there shall be any reclassification of securities (including any
             reverse stock split), or recapitalization of the Company, or any
             merger or consolidation of the Company with any of its Subsidiaries
             or any other transaction or series of transactions involving the
             Company or any of its Subsidiaries, other than a transaction or
             transactions to which the provisions of Section 13(a) apply
             (whether or not with or into or otherwise involving an Acquiring
             Person) which has the effect, directly or indirectly, of increasing
             by more than one percent (1%) the proportionate share of the
             outstanding shares of any class of equity securities of the Company
             or any of its Subsidiaries which is directly or indirectly
             beneficially owned by any Acquiring Person or any Associate or
             Affiliate of any Acquiring Person,

then, promptly following five (5) days after the date of the occurrence of an
event described in Section 11(a)(ii)(B) hereof and promptly following the
occurrence of any event described in Section 11(a)(ii)(A) or (C) hereof, proper
provision shall be made so that each holder of a Right (except as provided below
and in Section 7(e) hereof) shall thereafter have the right to receive, upon
exercise thereof at the then current Purchase Price in accordance with the terms
of this Agreement, in lieu of shares of Preferred Stock, such number of shares
of Common Stock of the Company as shall equal the result obtained by (x)
multiplying the then current Purchase Price by the then number of one
one-hundredths of a share of Preferred Stock for which a Right was exercisable
immediately prior to the first occurrence of a Section 11(a)(ii) Event, and
dividing that product (which, following such first occurrence, shall thereafter
be referred to as the "Purchase Price" for each Right and for all purposes of
this Agreement) by (y) fifty percent (50%) of the current market price
(determined pursuant to Section 11(d) hereof) per share of Common Stock on the
date of such first occurrence (such number of shares, the "Adjustment Shares").

                       (iii) In the event that the number of shares of Common
         Stock which are authorized by the Company's charter but not outstanding
         or reserved for issuance for purposes other than upon exercise of the
         Rights are not sufficient to permit the exercise in full of the Rights
         in accordance with the foregoing subparagraph (ii) of this Section
         11(a), the Company 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 Purchase Price (such excess, the
         "Spread"), and (B) with respect to each Right, 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)
         Common Stock or other equity securities of the Company (including,
         without limitation, shares, or units of shares, of preferred stock
         which the Board of Directors of the Company has deemed to have the same
         value as shares of Common Stock (such shares of preferred stock,
         "common stock equivalents")), (4) debt securities of the Company, (5)
         other assets, or (6) any combination of the foregoing, having an
         aggregate value equal to the Current Value, where such aggregate value
         has been determined by the Board of Directors of the Company based upon
         the advice of a nationally recognized investment banking firm selected
         by the Board of Directors of the Company; provided, however, if the
         Company shall not have made adequate provision to deliver value
         pursuant to clause (B) above within thirty (30) days following the
         later of (x) the first occurrence of a Section 11(a)(ii) Event and (y)
         the date on which the Company's right of redemption


                                       13

<PAGE>   16

         pursuant to Section 23(a) expires (the later of (x) and (y) being
         referred to herein as the "Section 11(a)(ii) Trigger Date"), then the
         Company shall be obligated to deliver, upon the surrender for exercise
         of a Right and without requiring payment of the Purchase Price, shares
         of Common Stock (to the extent available) and then, if necessary, cash,
         which in the aggregate are equal to the Spread. If the Board of
         Directors of the Company shall determine in good faith that it is
         likely that sufficient additional shares of Common Stock could be
         authorized for issuance upon exercise in full of the Rights, the thirty
         (30) day period set forth above may be extended to the extent
         necessary, but not more than ninety (90) days following the first
         occurrence of a Section 11(a)(ii) Trigger Date, in order that the
         Company may seek shareholder approval for the authorization of such
         additional shares (such period, as it may be extended, the
         "Substitution Period"). To the extent that the Company determines that
         some action need be taken pursuant to the first and/or second sentences
         of this Section 11(a)(iii), the Company (x) shall provide, subject to
         Section 7(e) hereof, that such action shall apply uniformly to all
         outstanding Rights, and (y) may suspend the exercisability of the
         Rights until the expiration of the Substitution Period in order to seek
         any authorization of additional shares and/or to decide the appropriate
         form of distribution to be made pursuant to 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(a)(iii), the value of the
         Common Stock shall be the current market price (as determined pursuant
         to Section 11(d) hereof) per share of the Common Stock on the date of
         the first occurrence of a Section 11(a)(ii) Trigger Date and the value
         of any "common stock equivalent" shall be deemed to have the same value
         as the Common Stock on such date.

                           (iv) The right to buy Common Stock of the Company
         pursuant to Section 11(a)(ii) hereof shall not arise as a result of any
         Person becoming an Acquiring Person through an acquisition of Common
         Stock pursuant to a Permitted Offer.

                   (b) In case the Company shall fix a record date for the
issuance of rights, options or warrants to all holders of Preferred Stock
entitling them to subscribe for or purchase (for a period expiring within
forty-five (45) calendar days after such record date) Preferred Stock (or shares
having the same rights, privileges and preferences as the shares of Preferred
Stock ("equivalent preferred stock")) or securities convertible into Preferred
Stock or equivalent preferred stock at a price per share of Preferred Stock or
per share of equivalent preferred stock (or having a conversion price per share,
if a security convertible into Preferred Stock or equivalent preferred stock)
less than the current market price (as determined pursuant to Section 11(d)
hereof) per share of Preferred Stock on such record date, the Purchase Price to
be in effect after such record date shall be determined by multiplying the
Purchase Price in effect immediately prior to such record date by a fraction,
the numerator of which shall be the number of shares of Preferred Stock
outstanding on such record date, plus the number of shares of Preferred Stock
which the aggregate offering price of the total number of shares of Preferred
Stock and/or equivalent preferred stock so to be offered (and/or the aggregate
initial conversion price of the convertible securities so to be offered) would
purchase at such current market price, and the denominator of which shall be the
number of shares of Preferred Stock outstanding on such record date, plus the
number of additional shares of Preferred Stock and/or equivalent preferred stock
to be offered for subscription or purchase (or into which the convertible
securities so to be offered are initially convertible); 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
issuable upon the exercise of one Right. In case such


                                       14

<PAGE>   17

subscription price may be paid by delivery of consideration part or all of which
may 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. Shares of
Preferred Stock owned by or held for the account of the Company shall not be
deemed outstanding for the purpose of any such computation. Such adjustment
shall be made successively whenever such a record date is fixed, and in the
event that such rights or warrants are not so issued, the Purchase Price shall
be adjusted to be the Purchase Price which would then be in effect if such
record date had not been fixed.

                   (c) In case the Company shall fix a record date for a
distribution to all holders of Preferred Stock (including any such distribution
made in connection with a consolidation or merger in which the Company is the
continuing corporation) of evidences of indebtedness, cash (other than a regular
cash dividend out of the earnings or retained earnings of the Company), assets
(other than a dividend payable in Preferred Stock, but including any dividend
payable in stock other than Preferred Stock) or subscription rights or warrants
(excluding those referred to in Section 11(b) hereof), 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 market price (as determined pursuant to
Section 11(d) hereof) per share of Preferred Stock 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 or evidences of indebtedness so
to be distributed or of such subscription rights or warrants applicable to a
share of Preferred Stock and the denominator of which shall be such current
market price (as determined pursuant to Section 11(d) hereof) per share of
Preferred Stock; 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 issuable upon the 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 be adjusted to be the Purchase Price which would have been in effect
if such record date had not been fixed.

                       (d) (i) For the purpose of any computation hereunder,
         other than computations made pursuant to Section 11(a)(iii) hereof, the
         "current market price" per share of Common Stock on any date shall be
         deemed to be the average of the daily closing prices per share of such
         Common Stock for the thirty (30) consecutive Trading Days (as such term
         is hereinafter defined) immediately prior to such date, and for
         purposes of computations made pursuant to Section 11(a)(iii) hereof,
         the "current market price" per share of Common Stock on any date shall
         be deemed to be the average of the daily closing prices per share of
         such Common Stock for the ten (10) consecutive Trading Days immediately
         prior to and not including such date; provided, however, that in the
         event that the current market price per share of the Common Stock is
         determined during a period prior to and not including the announcement
         by the issuer of such Common Stock of (A) a dividend or distribution on
         such Common Stock payable in shares of such Common Stock or securities
         convertible into shares of such Common Stock (other than the Rights),
         or (B) any subdivision, combination or reclassification of such Common
         Stock, and prior to the expiration of the requisite thirty (30) Trading
         Day or ten (10) Trading Day period, as set forth above, after the
         dividend date for such dividend or distribution, or the record date for
         such subdivision, combination or reclassification, then, and in each
         such case, the "current market price" shall be properly adjusted to
         take into account ex-dividend trading. The closing price for each day
         shall be the last sale price, regular way,


                                       15
<PAGE>   18
         or, in case no such sale takes place on such day, the average of the
         closing bid and asked prices, regular way, or, in either case as
         reported in the principal consolidated transaction reporting system
         with respect to securities listed or admitted to trading on the New
         York Stock Exchange or, if the shares of Common Stock are not listed or
         admitted to trading on the New York Stock Exchange, as reported in the
         principal consolidated transaction reporting system with respect to
         securities listed on the principal national securities exchange on
         which the shares of Common Stock are listed or admitted to trading or,
         if the shares of Common Stock are not listed or admitted to trading on
         any national securities exchange, the last quoted price or, if not so
         quoted, the average of the high bid and low asked prices in the
         over-the-counter market, as reported by the National Association of
         Securities Dealers, Inc. Automated Quotation System ("NASDAQ") or such
         other system then in use, or, if on any such date the shares of Common
         Stock are not quoted by any such organization, the average of the
         closing bid and asked prices as furnished by a professional market
         maker making a market in the Common Stock selected by the Board of
         Directors of the Company. If on any such date no market maker is making
         a market in the Common Stock, the fair value of such shares on such
         date as determined in good faith by the Board 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 shares of
         Common Stock are listed or admitted to trading is open for the
         transaction of business or, if the shares of Common Stock are not
         listed or admitted to trading on any national securities exchange, a
         Business Day. If the Common Stock is not publicly held or not so listed
         or traded, "current market price" per share shall mean the fair value
         per share 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 conclusive for all purposes.

                           (ii) For the purpose of any computation hereunder,
         the "current market price" per share of Preferred Stock shall be
         determined in the same manner as set forth above for the Common Stock
         in clause (i) of this Section 11(d) (other than the last sentence
         thereof). If the current market price per share of Preferred Stock
         cannot be determined in the manner provided above or if the Preferred
         Stock is not publicly held or listed or traded in a manner described in
         clause (i) of this Section 11(d), the "current market price" per share
         of Preferred Stock shall be conclusively deemed to be an amount equal
         to 100 (as such number may be appropriately adjusted for such events as
         stock splits, stock dividends and recapitalizations with respect to the
         Common Stock occurring after the date of this Agreement) multiplied by
         the current market price per share of the Common Stock. If neither the
         Common Stock nor the Preferred Stock is publicly held or so listed or
         traded, "current market price" per share of the Preferred Stock shall
         mean the fair value per share 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 conclusive for all
         purposes. For all purposes of this Agreement, the "current market
         price" of one one-hundredth of a share of Preferred Stock shall be
         equal to the "current market price" of one share of Preferred Stock
         divided by one hundred (100).

                    (e) Anything herein to the contrary notwithstanding, no
adjustment in the Purchase Price shall be required unless such adjustment would
require an increase or decrease of at least one percent (1%) in the Purchase
Price; provided, however, that any adjustments which by reason of this Section
11(e) are not required to be made shall be carried forward and taken into
account in any subsequent adjustment. All calculations under this Section 11
shall be made to the nearest cent or to the nearest ten-thousandth of a share of
Common Stock or other share or


                                       16

<PAGE>   19
one-millionth of a share of Preferred Stock, as the case may be. Notwithstanding
the first sentence of this Section 11(e), any adjustment required by this
Section 11 shall be made no later than the earlier of (i) three (3) years from
the date of the transaction which mandates such adjustment, or (ii) the
Expiration Date.

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

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

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

                    (i) The Company may elect on or after the date of any
adjustment of the Purchase Price to adjust the number of Rights, in lieu of any
adjustment in the number of one one-hundredths of a share of Preferred Stock
purchasable upon the exercise of a Right. Each of the Rights outstanding after
the adjustment in the number of Rights shall be exercisable for the number of
one one-hundredths of a share of Preferred Stock for which a Right was
exercisable immediately prior to such adjustment. Each Right held of record
prior to such adjustment of the number of Rights shall become that number of
Rights (calculated to the nearest one-ten-thousandth) obtained by dividing the
Purchase Price in effect immediately prior to adjustment of the Purchase Price
by the Purchase Price in effect immediately after adjustment of the Purchase
Price. The Company shall make a public announcement of its election to adjust
the number of Rights, indicating the record date for the adjustment, and, if
known at the time, the amount of the adjustment to be made. The Company shall
provide written notice of any public announcement to the Rights Agent, in
addition to a copy of such announcement. This record date may be the date on
which the Purchase Price is adjusted or any day thereafter, but, if the Rights
Certificates have been issued, shall be at least ten (10) days later than the
date of the public announcement. If Rights Certificates have been issued, upon
each adjustment of the number of Rights pursuant to this Section 11(i), the
Company shall, as promptly as practicable, cause to be distributed to holders of
record of Rights Certificates on such record date Rights Certificates
evidencing, subject to Section 14 hereof, the additional Rights to which such
holders shall be entitled as a result of such adjustment, or, at the option of
the Company, shall cause to be distributed to such holders of record in
substitution and replacement for the Rights Certificates held by such holders
prior to the date of adjustment, and upon surrender thereof, if required by the
Company, new Rights


                                       17
<PAGE>   20

Certificates evidencing all the Rights to which such holders shall be entitled
after such adjustment. Rights Certificates so to be distributed shall be issued,
executed and countersigned in the manner provided for herein (and may bear, at
the option of the Company, the adjusted Purchase Price) and shall be registered
in the names of the holders of record of Rights Certificates on the record date
specified in the public announcement.

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

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

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

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

                    (n) The Company covenants and agrees that it shall not, at
any time after the Distribution Date, (i) consolidate with any other Person
(other than a Subsidiary of the Company in a transaction which complies with
Section 11(o) hereof), (ii) merge with or into any other Person (other than a
Subsidiary of the Company in a transaction which complies with Section 11(o)
hereof), or (iii) sell or transfer (or permit any Subsidiary to sell or
transfer), in one transaction, or a series of related transactions, assets or
earning power aggregating more than fifty percent (50%) of the assets or earning
power of the Company and its Subsidiaries (taken as a whole) to any other Person
or Persons (other than the Company and or any of its Subsidiaries in one or more
transactions each of


                                       18

<PAGE>   21

which complies with Section 11(o) hereof), if (x) at the time of or immediately
after such consolidation, merger or sale there are any rights, warrants or other
instruments or securities outstanding or agreements in effect which would
substantially diminish or otherwise eliminate the benefits intended to be
afforded by the Rights or (y) prior to, simultaneously with or immediately after
such consolidation, merger or sale, the shareholders of the Person who
constitutes, or would constitute, the "Principal Party" for the purposes of
Section 13(a) hereof shall have received a distribution of Rights previously
owned by such Person or any of its Affiliates and Associates.

                    (o) The Company covenants and agrees that, after the
Distribution Date, it will not, except as permitted by Section 23, Section 24 or
Section 27 hereof, take (or permit any Subsidiary to take) any action if at the
time such action is taken it is reasonably foreseeable that such action will
diminish substantially or otherwise eliminate the benefits intended to be
afforded by the Rights.

                    (p) Anything in this Agreement to the contrary
notwithstanding, in the event that the Company shall at any time after the
Rights Dividend Declaration Date and prior to the Distribution Date (i) declare
a dividend on the outstanding shares of Common Stock payable in shares of Common
Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine the
outstanding Common Stock into a smaller number of shares, the number of Rights
associated with each share of Common Stock then outstanding, or issued or
delivered thereafter but prior to the Distribution Date, shall be
proportionately adjusted so that the number of Rights thereafter associated with
each share of Common Stock following any such event shall equal the result
obtained by multiplying the number of Rights associated with each share of
Common Stock immediately prior to such event by a fraction, the numerator of
which shall be the total number of shares of Common Stock outstanding
immediately prior to the occurrence of the event and the denominator of which
shall be the total number of shares of Common Stock outstanding immediately
following the occurrence of such event.

         SECTION 12. CERTIFICATE OF ADJUSTED PURCHASE PRICE OR NUMBER OF SHARES.
Whenever an adjustment is made as provided in Section 11 and Section 13 hereof,
the Company shall (a) promptly prepare a certificate setting forth such
adjustment and a brief statement of the facts computations, methodology and
accounting for such adjustment, (b) promptly file with the Rights Agent, and
with each transfer agent for the Preferred Stock and the Common Stock, a copy of
such certificate, and (c) mail a brief, reasonably detailed summary thereof to
each holder of a Rights Certificate (or, if prior to the Distribution Date, to
each holder of a certificate representing shares of Common Stock) in accordance
with Section 26 hereof. Notwithstanding the foregoing sentence, the failure of
the Company to make such certification or give such notice shall not affect the
validity of such adjustment or the force or effect of the requirement for such
adjustment. The Rights Agent shall be fully protected in relying on any such
certificate and on any adjustment therein contained.

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

                     (a) In the event that, following the Stock Acquisition
Date, directly or indirectly, (x) the Company shall consolidate with, or merge
with and into, any other Person (other than a Subsidiary of the Company in a
transaction which complies with Section 11(o) hereof), and the Company shall not
be the continuing or surviving corporation of such consolidation or merger, (y)
any Person (other than a Subsidiary of the Company in a transaction which
complies with Section 11(o) hereof) shall consolidate with, or merge with or
into, the Company, and the Company shall be the continuing or surviving
corporation of such consolidation or merger and, in connection with such


                                       19

<PAGE>   22

consolidation or merger, all or part of the outstanding shares of Common Stock
shall be changed into or exchanged for stock or other securities of any other
Person or cash or any other property, or (z) the Company shall sell or otherwise
transfer (or one or more of its Subsidiaries shall sell or otherwise transfer),
in one transaction or a series of related transactions, assets or earning power
aggregating more than fifty percent (50%) of the assets or earning power of the
Company and its Subsidiaries (taken as a whole) to any Person or Persons (other
than the Company or any Subsidiary of the Company in one or more transactions
each of which complies with Section 11(o) hereof), then, and in each such case,
proper provision shall be made so that: (i) each holder of a Right, except as
provided in Section 7(e) hereof, shall thereafter have the right to receive,
upon the exercise thereof at the then current Purchase Price in accordance with
the terms of this Agreement, such number of validly authorized and issued, fully
paid, nonassessable and freely tradable shares of Common Stock 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 (1) multiplying the then current Purchase Price by the
number of one one-hundredths of a share of Preferred Stock for which a Right is
exercisable immediately prior to the first occurrence of a Section 13 Event (or,
if a Section 11(a)(ii) Event has occurred prior to the first occurrence of a
Section 13 Event, multiplying the number of such one one-hundredths of a share
for which a Right was exercisable immediately prior to the first occurrence of a
Section 11(a)(ii) Event by the Purchase Price in effect immediately prior to
such first occurrence), and (2) dividing that product (which, following the
first occurrence of a Section 13 Event, shall be referred to as the "Purchase
Price" for each Right and for all purposes of this Agreement) by fifty percent
(50%) of the current market price (determined pursuant to Section 11(d)(i)
hereof) per share of the Common Stock of such Principal Party on the date of
consummation of such Section 13 Event; (ii) such Principal Party shall
thereafter be liable for, and shall assume, by virtue of such Section 13 Event,
all the obligations and duties of the Company pursuant to this Agreement; (iii)
the term "Company" shall thereafter be deemed to refer to such Principal Party,
it being specifically intended that the provisions of Section 11 hereof shall
apply only to such Principal Party following the first occurrence of a Section
13 Event; (iv) such Principal Party shall take such steps (including, but not
limited to, the reservation of a sufficient number of shares of its Common
Stock) in connection with the consummation of any such transaction as may be
necessary to assure that the provisions hereof shall thereafter be applicable,
as nearly as reasonably may be, in relation to its shares of Common Stock
thereafter deliverable upon the exercise of the Rights; provided, however, that
upon the subsequent occurrence of any merger, consolidation, sale of all or
substantially all assets, recapitalization, reclassification of shares,
reorganization 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 a payment of the Purchase Price, such cash, shares, rights,
warrants and other property which such holder would have been entitled to
receive had he, at the time of such transaction, owned the shares of Common
Stock of the Principal Party purchasable upon the exercise of a Right, 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; and (v) the provisions of Section
11(a)(ii) hereof shall be of no effect following the first occurrence of any
Section 13 Event.

                     (b) "Principal Party" shall mean:

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


                                       20


<PAGE>   23

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

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

         (c) If, for any reason, the Rights cannot be exercised for Common Stock
of such Principal Party as provided in Section 13(a), then each holder of Rights
shall have the right to exchange its Rights for cash from such Principal Party
in an amount equal to the number of shares of Common Stock that it would
otherwise be entitled to purchase times fifty percent (50%) of the current per
share market price, as determined pursuant to Section 11(d) hereof, of such
Common Stock of such Principal Party. If, for any reason, the foregoing
formulation cannot be applied to determine the cash amount into which the Rights
are exchangeable, then the Board of Directors, based upon the advice of one or
more nationally recognized investment banking firms, and based upon the total
value of the Company, shall determine such amount reasonably and with good faith
to the holders of Rights. Any such determination shall be final and binding on
the Rights Agent.

         (d) Notwithstanding anything in this Agreement to the contrary, Section
13 shall not be applicable to a transaction described in clauses (x) and (y) of
Section 13(a) if: (i) such transaction is consummated with a Person or Persons
who acquired Common Stock pursuant to a Permitted Offer (or a wholly-owned
Subsidiary of any such Person or Persons); (ii) the price per share of Common
Stock offered in such transaction is not less than the price per share of Common
Stock paid to all holders of Common Stock whose shares were purchased pursuant
to such Permitted Offer; and (iii) the form of consideration being offered to
the remaining holders of Common Stock pursuant to such transaction is the same
form as the form of consideration paid pursuant to such Permitted Offer. Upon
consummation of any such transaction contemplated by this Section 13(d), all
Rights hereunder shall expire.

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

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


                                       21


<PAGE>   24

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

                    (iii) use its best efforts, if the Common Stock of the
         Principal Party shall become listed on a national securities exchange,
         to list (or continue the listing of) the Rights and the securities
         purchasable upon exercise of the Rights on such securities exchange
         and, if the Common Stock of the Principal Party shall not be listed on
         a national securities exchange, to cause the Rights and the securities
         purchasable upon exercise of the Rights to be reported by NASDAQ or
         such other system then in use; and

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

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

         SECTION 14. FRACTIONAL RIGHTS AND FRACTIONAL SHARES.

                     (a) The Company shall not be required to issue fractions of
Rights, except prior to the Distribution Date as provided in Section 11(p)
hereof, or to distribute Rights Certificates which evidence fractional Rights.
In lieu of such fractional Rights, there shall be paid to the registered holders
of the Rights Certificates with regard to which such fractional Rights would
otherwise be issuable, an amount in cash equal to the same fraction of the
current market value of a whole Right. For purposes of this Section 14(a), the
current market value of a whole Right shall be the closing price of the Rights
for the Trading Day immediately prior to the date on which such fractional
Rights would have been otherwise issuable. The closing price of the Rights 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 fair value of the
Rights on such date as determined in good faith by the Board of Directors of the
Company shall be used.

                     (b) The Company shall not be required to issue fractions of
shares of Preferred Stock (other than fractions which are integral multiples of
one one-hundredth of a share of Preferred Stock) upon exercise of the Rights or
to distribute certificates which evidence fractional shares of Preferred Stock
(other than fractions which are integral multiples of one one-hundredth of a
share of


                                       22

<PAGE>   25

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

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

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

         SECTION 15. RIGHTS OF ACTION. All rights of action in respect of this
Agreement are vested in the respective registered holders of the Rights
Certificates (and, prior to the Distribution Date, the registered holders of the
Common Stock); and any registered holder of any Rights Certificate (or, prior to
the Distribution Date, of the Common Stock), without the consent of the Rights
Agent or of the holder of any other Rights Certificate (or, prior to the
Distribution Date, of the Common Stock), may, in his own behalf and for his own
benefit, enforce, and may institute and maintain any suit, action or proceeding
against the Company to enforce, or otherwise act in respect of, his right to
exercise the Rights evidenced by such Rights Certificate in the manner provided
in such Rights Certificate and in this Agreement. Without limiting the foregoing
or any remedies available to the holders of Rights, it is specifically
acknowledged that the holders of Rights would not have an adequate remedy at law
for any breach of this Agreement and shall be entitled to specific performance
of the obligations hereunder and injunctive relief against actual or threatened
violations of the obligations hereunder of any Person subject to this Agreement.

         SECTION 16. AGREEMENT OF RIGHTS HOLDERS. Every holder of a Right by
accepting the same consents and agrees with the Company and the Rights Agent and
with every other holder of a Right that:

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

                    (b) after the Distribution Date, the Rights Certificates are
transferable only on the registry books of the Rights Agent if surrendered at
the principal office or offices of the Rights Agent designated for such
purposes, duly endorsed or accompanied by proper instruments of transfer and
with the appropriate forms and certificates fully executed;


                                       23


<PAGE>   26

                    (c) subject to Section 6(a) and Section 7(f) hereof, the
Company and the Rights Agent may deem and treat the Person in whose name a
Rights Certificate (or, prior to the Distribution Date, the associated Common
Stock certificate) is registered as the absolute owner thereof and of the Rights
evidenced thereby (notwithstanding any notations of ownership or writing on the
Rights Certificates or the associated Common Stock certificate made by anyone
other than the Company or the Rights Agent) for all purposes whatsoever, and
neither the Company nor the Rights Agent shall be required to be affected by any
notice to the contrary; and

                    (d) notwithstanding anything in this Agreement to the
contrary, neither the Company nor the Rights Agent shall have any liability to
any holder of a Right or other Person as a result of its inability to perform
any of its obligations under this Agreement by reason of any preliminary or
permanent injunction or other order, decree, judgement or ruling (whether
interlocutory or final) issued by a court of competent jurisdiction or by a
governmental, regulatory or administrative agency or commission, or any statute,
rule, regulation or executive order promulgated or enacted by any governmental
authority, prohibiting or otherwise restraining performance of such obligation;
provided, however, the Company must use its best efforts to have any such order,
decree or ruling lifted or otherwise overturned as soon as possible.

         SECTION 17. RIGHTS CERTIFICATE HOLDER NOT DEEMED A STOCKHOLDER. No
holder, as such, of any Rights Certificate shall be entitled to vote, receive
dividends or be deemed for any purpose the holder of the number of one
one-hundredths of a share of Preferred Stock or any other securities of the
Company which may at any time be issuable on the exercise of the Rights
represented thereby, nor shall anything contained herein or in any Rights
Certificate be construed to confer upon the holder of any Rights Certificate, as
such, any of the rights of a stockholder of the Company or any right to vote for
the election of directors or upon any matter submitted to stockholders at any
meeting thereof, or to give or withhold consent to any corporate action, or to
receive notice of meetings or other actions affecting stockholders (except as
provided in Section 25 hereof), or to receive dividends or subscription rights,
or otherwise, until the Right or Rights evidenced by such Rights Certificate
shall have been exercised in accordance with the provisions hereof.

         SECTION 18. CONCERNING THE RIGHTS AGENT.

                     (a) The Company agrees to pay to the Rights Agent
reasonable compensation for all services rendered by it hereunder and, from time
to time, on demand of the Rights Agent, its reasonable expenses and counsel fees
and disbursements 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,
judgement, fine, penalty, claim, demand, settlement, cost or expense, incurred
without negligence, bad faith or willful misconduct on the part of the Rights
Agent, of any action taken, suffered or omitted by the Rights Agent in
connection with the acceptance and administration of this Agreement, including,
without limitation, the costs and expenses of defending against any claim of
liability in the premises. The costs and expenses incurred in enforcing this
right of indemnification shall be paid by the Company. Anything to the contrary
notwithstanding, in no event shall the Rights Agent be liable for special,
punitive, indirect, consequential or incidental loss or damage of any kind
whatsoever (including but not limited to lost profits), even if the Rights Agent
has been advised of the possibility of such loss or damage. Any liability of the
Rights Agent under this Rights Agreement will be limited to the amount of fees
paid by the Company to the Rights Agent hereunder.

                    (b) The Rights Agent shall be authorized, 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 Rights Certificate or certificate for Common
Stock or for other securities of the Company, instrument of assignment or
transfer, power of attorney, endorsement, affidavit, letter, notice, direction,
consent, certificate, statement, or other paper or document believed by it to be
genuine and to be signed, executed and, where necessary, verified or
acknowledged, by the proper Person or Persons. The Rights Agent shall be fully
protected in relying on any such certificate and on any adjustment therein
contained. The Rights Agent shall not be deemed to have any duty or notice
unless and until the Company has provided the Rights Agent with written notice.


                                       24

<PAGE>   27

         SECTION 19. MERGER OR CONSOLIDATION OR CHANGE OF NAME OF RIGHTS AGENT.

                     (a) Any Person into which the Rights Agent or any successor
Rights Agent may be merged or with which it may be consolidated, or any Person
resulting from any merger or consolidation to which the Rights Agent or any
successor Rights Agent shall be a party, or any Person succeeding to the stock
transfer or shareholder services business of the Rights Agent or any successor
Rights Agent, shall be the successor to the Rights Agent under this Agreement
without the execution or filing of any paper or any further act on the part of
any of the parties hereto; provided, however, that such corporation would be
eligible for appointment as a successor Rights Agent under the provisions of
Section 21 hereof. In case at the time such successor Rights Agent shall succeed
to the agency created by this Agreement, any of the Rights Certificates shall
have been countersigned but not delivered, any such successor Rights Agent may
adopt the countersignature of a predecessor Rights Agent and deliver such Rights
Certificates so countersigned; and in case at that time any of the Rights
Certificates shall not have been countersigned, any successor Rights Agent may
countersign such Rights Certificates either in the name of the predecessor or in
the name of the successor Rights Agent; and in all such cases such Rights
Certificates shall have the full force provided in the Rights Certificates and
in this Agreement.

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

         SECTION 20. DUTIES OF RIGHTS AGENT. The Rights Agent undertakes the
duties and obligations expressly imposed by this Agreement upon the following
terms and conditions, by all of which the Company and the holders of Rights
Certificates, by their acceptance thereof, shall be bound:

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

                     (b) Whenever in the performance of its duties under this
Agreement the Rights Agent shall deem it necessary or desirable that any fact or
matter (including, without limitation, the identity of any Acquiring Person and
the determination of "current market price") be proved or established by the
Company prior to taking or suffering 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
the Chairman of the Board, the President, any Vice President, the Treasurer, any
Assistant Treasurer, the Secretary or any Assistant Secretary of the Company and
delivered to the Rights Agent; and such certificate shall be full authorization
and protection to the Rights Agent and the Rights Agent shall incur no liability
for, or in respect of, any action taken, suffered or omitted in good faith by it
under the provisions of this Agreement in reliance upon such certificate.

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


                                       25

<PAGE>   28

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

                     (e) The Rights Agent shall not be under any responsibility
with respect to the validity of this Agreement or the execution and delivery
hereof (except the due execution hereof by the Rights Agent) or with respect to
the validity or execution of any Rights Certificate (except its countersignature
thereof); nor shall it be responsible for any breach by the Company of any
covenant or condition contained in this Agreement or in any Rights Certificate;
nor shall it be responsible for any adjustment required under the provisions of
Section 11 or Section 13 hereof or responsible for the manner, method or amount
of any such adjustment or the ascertaining of the existence of facts that would
require any such adjustment (except with respect to the exercise of Rights
evidenced by Rights Certificates after actual notice of any such adjustment);
nor shall it by any act hereunder be deemed to make any representation or
warranty as to the authorization or reservation of any shares of Common Stock or
Preferred Stock to be issued pursuant to this Agreement or any Rights
Certificate or as to whether any shares of Common Stock or Preferred Stock will,
when so issued, be validly authorized and issued, fully paid and nonassessable.

                     (f) 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.

                     (g) The Rights Agent is hereby authorized and directed to
accept instructions with respect to the performance of its duties hereunder from
the Chairman of the Board, the President, any Vice President, the Secretary, any
Assistant Secretary, the Treasurer or any Assistant Treasurer of the Company,
and to apply to such officers for advice or instructions in connection with its
duties, and such instructions shall be full authorization and protection to the
Rights Agent, and the Rights Agent shall incur no liability for, or in respect
of, any action taken, suffered or omitted by it in good faith in accordance with
instructions of any such officer. The Rights Agent may conclusively rely on the
most recent instructions given by any such officer.

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

                     (i) The Rights Agent may execute and exercise any of the
rights or powers hereby vested in it or perform any duty hereunder either itself
or by or through its attorneys or agents, and the Rights Agent shall not be
answerable or accountable for any act, default, neglect or misconduct of any
such attorneys or agents or for any loss to the Company resulting from any such
act, default, neglect or misconduct, absent gross negligence, bad faith or
willful misconduct in the selection and continued employment thereof.

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


                                       26


<PAGE>   29

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

         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 Stock and Preferred Stock by registered or
certified mail, and to the holders of the Rights Certificates by first-class
mail. The Company may remove the Rights Agent or any successor Rights Agent upon
thirty (30) days' notice in writing, mailed to the Rights Agent or successor
Rights Agent, as the case may be, and to each transfer agent of the Common Stock
and Preferred Stock, by registered or certified mail, and to the holders of the
Rights Certificates by first-class mail. If the Rights Agent shall resign or be
removed or shall otherwise become incapable of acting, the Company shall appoint
a successor to the Rights Agent. If the Company shall fail to make such
appointment within a period of thirty (30) days after giving notice of such
removal or after it has been notified in writing of such resignation or
incapacity by the resigning or incapacitated Rights Agent or by the holder of a
Rights Certificate (who shall, with such notice, submit his Rights Certificate
for inspection by the Company), then any registered holder of any Rights
Certificate may apply to any court of competent jurisdiction for an appointment
of a new Rights Agent. Any successor Rights Agent, whether appointed by the
Company or by such a court, shall be (a) a Person organized and doing business
under the law of the United States or of the State of California (or of any
other state of the United States so long as such Person is authorized to do
business as a banking institution in the State of California), in good standing,
having a principal office in the State of California, subject to supervision or
examination by federal or state authority and which has at the time of its
appointment as Rights Agent a combined capital and surplus of at least
$100,000,000, or (b) an Affiliate of a corporation described in clause (a) of
this sentence. After appointment, the successor Rights Agent shall be vested
with the same powers, rights, duties and responsibilities as if it had been
originally named as Rights Agent without further act or deed; but the
predecessor Rights Agent shall deliver and transfer to the successor Rights
Agent any property at the time held by it hereunder, and execute and deliver any
further assurance, conveyance, act or deed necessary for the purpose. Not later
than the effective date of any such appointment, the Company shall file notice
thereof in writing with the predecessor Rights Agent and each transfer agent of
the Common Stock and the Preferred Stock, and mail a notice thereof in writing
to the registered holders of the Rights Certificates. Failure to give any notice
provided for in this Section 21, however, or any defect therein, shall not
affect the legality or validity of the resignation or removal of the Rights
Agent or the appointment of the successor Rights Agent, as the case may be.

         SECTION 22. ISSUANCE OF NEW RIGHTS CERTIFICATES. Notwithstanding any of
the provisions of this Agreement or of the Rights to the contrary, the Company
may, at its option, issue new Rights Certificates evidencing Rights in such form
as may be approved by 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 Rights Certificates made in
accordance with the provisions of this Agreement. In addition, in connection
with the issuance or sale of shares of


                                       27

<PAGE>   30

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

         SECTION 23. REDEMPTION.

                     (a) The Board of Directors of the Company may, at its
option, at any time prior to the earlier of (i) the Close of Business on the
tenth day following the Stock Acquisition Date, or such later date as may be
determined by action of a majority of the Board of Directors then in office and
publicly announced by the Company (or, if the Stock Acquisition Date shall have
occurred prior to the Record Date, the Close of Business on the tenth day
following the Record Date, or such later date as may be determined by action of
a majority of the Board of Directors then in office and publicly announced by
the Company), or (ii) the Close of Business on the Final Expiration Date, redeem
all but not less than all of the then outstanding Rights at a redemption price
of $.01 per Right, as such amount may be appropriately adjusted to reflect any
stock split, stock dividend or similar transaction occurring after the date
hereof (such redemption price being hereinafter referred to as the "Redemption
Price"). Notwithstanding anything contained in this Agreement to the contrary, a
Distribution Date shall not occur and the Rights shall not be exercisable until
such time as the Company's right of redemption hereunder has expired. The
Company may, at its option, pay the Redemption Price in cash, shares of Common
Stock (based on the "current market price", as defined in Section 11(d)(i)
hereof, of the Common Stock at the time of redemption) or any other form of
consideration deemed appropriate by the Board of Directors.

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

         SECTION 24. EXCHANGE.

                     (a) Subject to applicable laws, rules and regulations, and
subject to subsection (c) below, the Company may, at its option, by majority
vote of the Board of Directors, at any time after the occurrence of a Section
11(a)(ii) Event, exchange all or part of the then outstanding and


                                       28

<PAGE>   31
exercisable Rights (which shall not include Rights that have become null and
void pursuant to the provisions of Section 7(e) hereof) for Common Stock in an
amount per Right (appropriately adjusted to reflect any stock split, stock
dividend or similar transaction occurring after the date hereof) as shall equal
the result obtained by (x) multiplying the then current Purchase Price by the
then number of one one-hundredths of a share of Preferred Stock for which a
Right was exercisable immediately prior to the first occurrence of a Section
11(a)(ii) Event, (y) dividing that product by fifty percent (50%) of the current
market price (determined pursuant to Section 11(d) hereof) per share of Common
Stock on the date of such first occurrence, and (z) multiplying that quotient by
fifty percent (50%) (such exchange ratio being hereinafter referred to as the
"Ratio of Exchange"). Notwithstanding the foregoing, the Board of Directors
shall not be empowered to effect such exchange at any time after any Person
(other than the Company, any Subsidiary of the Company, any employee benefit
plan of the Company or any such Subsidiary, or any entity holding Common Stock
for or pursuant to the terms of any such plan), together with all Affiliates and
Associates of such Person, becomes the Beneficial Owner of fifty percent (50%)
or more of the Common Stock then outstanding.

                     (b) Immediately upon the action of the Board of Directors
ordering the exchange of any Rights pursuant to subsection (a) of this Section
24 and without any further action and without any notice, the right to exercise
such Rights shall terminate and the only right thereafter of the holders of such
rights shall be to receive that number of shares of Common Stock equal to the
number of such Rights held by such holder multiplied by the Ratio of Exchange.
The Company shall give public notice of any such exchange, and written notice
to the Rights Agent of 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 shall mail a notice of any such exchange to all of the
holders of such Rights at their last addresses as they appear upon the registry
books of the Rights Agent. Any notice which is mailed in the manner herein
provided shall be deemed given, whether or not the holder receives the notice.
Each such notice of exchange will state the method by which the exchange of the
Common Stock 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 Rights
which have become void pursuant to the provisions of Section 7(e) hereof) held
by each holder of Rights.

                     (c) In the event that there shall not be sufficient shares
of Common Stock issued but not outstanding or authorized but unissued to permit
any exchange of Rights as contemplated in accordance with Section 24(a), the
Company shall either take such action as may be necessary to authorize
additional Common Stock for issuance upon exchange of the Rights or
alternatively, at the option of a majority of the Board of Directors, with
respect to each Right (i) pay cash in an amount equal to the Current Value (as
hereinafter defined), in lieu of issuing Common Stock in exchange therefor, or
(ii) issue debt or equity securities or a combination thereof, having a value
equal to the Current Value (as defined below), in lieu of issuing Common Stock
in exchange for each such Right, where the value of such securities shall be
determined by a nationally recognized investment banking firm selected by the
Board of Directors by majority vote of the Board of Directors, or (iii) deliver
any combination of cash, property, Common Stock and/or other securities having a
value equal to the Current Value in exchange for each Right. For purposes of
this Section 24(c) only, the Current Value shall mean the product of the current
per share market price of Common Stock (determined pursuant to Section 11(d) on
the date of the occurrence of the event described above in subparagraph (a))
multiplied by the number of shares of Common Stock for which the Right otherwise
would be exchangeable if there were sufficient shares available. To the extent
that the Company determines that some action need be taken pursuant to clauses
(i), (ii) or (iii) of this Section 24(c), the Board of Directors may temporarily
suspend the exercisability of the Rights for a period of up to sixty (60) days
following the date on which the event described in Section 24(a) shall have
occurred, in order to


                                       29

<PAGE>   32
seek any authorization of additional shares of Common Stock and/or to decide the
appropriate form of distribution to be made pursuant to the above provision 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.

                     (d) The Company shall not be required to issue fractions of
shares of Common Stock or to distribute certificates which evidence fractional
shares of Common Stock. In lieu of such fractional shares of Common Stock, there
shall be paid to the registered holders of the Rights Certificates with regard
to which such fractional shares of Common Stock would otherwise be issuable, an
amount in cash equal to the same fraction of the current per share market value
of a whole share of Common Stock (as determined pursuant to the second sentence
of Section 11(d) hereof).

                     (e) The Company may, at its option, by majority vote of the
Board of Directors, at any time before any Person has become an Acquiring
Person, exchange all or part of the then outstanding Rights for rights of
substantially equivalent value, as determined reasonably and with good faith by
the Board of Directors, based upon the advice of one or more nationally
recognized investment banking firms.

                     (f) Immediately upon the action of the Board of Directors
ordering the exchange of any Rights pursuant to subsection (e) of this Section
24 and without any further action and without any notice, the right to exercise
such Rights shall terminate and the only right thereafter of a holder of such
Rights shall be to receive that number of rights in exchange therefor as has
been determined by the Board of Directors in accordance with subsection (e)
above. The Company shall 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 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 transfer agent for the Common Stock
of the Company. Any notice which is mailed in the manner herein provided shall
be deemed given, whether or not the holder receives the notice. Each such notice
of exchange will state the method by which the exchange of the Rights will be
effected.

         SECTION 25. NOTICE OF CERTAIN EVENTS.

                     (a) In case the Company shall propose, at any time after
the Distribution Date, (i) to pay any dividend payable in stock of any class to
the holders of Preferred Stock or to make any other distribution to the holders
of Preferred Stock (other than a regular cash dividend out of earnings or
retained earnings of the Company), or (ii) to offer to the holders of Preferred
Stock rights or warrants to subscribe for or to purchase any additional shares
of Preferred Stock or shares of stock of any class or any other securities,
rights or options, or (iii) to effect any reclassification of its Preferred
Stock (other than a reclassification involving only the subdivision of
outstanding shares of Preferred Stock), or (iv) to effect any consolidation or
merger into or with any other Person (other than a Subsidiary of the Company in
a transaction which complies with Section 11(o) hereof), 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 transaction or a series of related transactions,
of more than fifty percent (50%) of the assets or earning power of the Company
and its Subsidiaries (taken as a whole) to any other Person or Persons (other
than the Company and/or any of its Subsidiaries in one or more transactions each
of which complies with Section 11(o) hereof), or (v) to effect the liquidation,
dissolution or winding up of the Company, or (vi) to declare or pay any dividend
on the Common Stock payable in Common


                                       30

<PAGE>   33
Stock or to effect a subdivision, consolidation or combination of the Common
Stock (by reclassification or otherwise than by payment in dividends in Common
Stock), then, in each such case, the Company shall give to the Rights Agent and
to each holder of a Rights Certificate, to the extent feasible and in accordance
with Section 26 hereof, a notice of such proposed action, which shall specify
the record date for the purposes of such stock dividend, distribution of rights
or warrants, or the date on which such reclassification, consolidation, merger,
sale, transfer, liquidation, dissolution, or winding up is to take place and the
date of participation therein by the holders of the shares of Preferred Stock,
if any such date is to be fixed, and such notice shall be so given in the case
of any action covered by clause (i) or (ii) above at least ten (10) days prior
to the record date for determining holders of the shares of Preferred Stock 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 shares of Preferred Stock whichever
shall be the earlier.

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

         SECTION 26. NOTICES. Notices or demands authorized by this Agreement to
be given or made by the Rights Agent or by the holder of any Rights Certificate
to or on the Company shall be sufficiently given or made if sent by first-class
mail, postage prepaid, addressed (until another address is filed in writing with
the Rights Agent) as follows:

                  DATUM INC.
                  9975 Toledo Way
                  Irvine, California 92618-1605
                  Attn: David A. Young
                        Chief Financial Officer

Subject to the provisions of Section 21, any notice or demand authorized by this
Agreement to be given or made by the Company or by the holder of any Rights
Certificate to or on the Rights Agent shall be sufficiently given or made if
sent by first-class mail, postage prepaid, addressed (until another address is
filed in writing with the Company) as follows:

                  CHASEMELLON SHAREHOLDER SERVICES, L.L.C.
                  Stock Transfer Department
                  400 South Hope Street, 4th Floor
                  Los Angeles, California  90071
                  Attn: Martha Mijango
                        Assistant Vice President

Notices or demands authorized by this Agreement to be given or made by the
Company or the Rights Agent to the holder of any Rights Certificate (or, if
prior to the Distribution Date, to the holder of certificates representing
shares of Common Stock) 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.


                                       31


<PAGE>   34
         SECTION 27. SUPPLEMENTS AND AMENDMENTS. This Agreement may be
supplemented or amended at the times and for the purposes set forth below. Prior
to the Distribution Date, the Company and the Rights Agent shall, if the Company
so directs, supplement or amend any provision of this Agreement without the
approval of any holders of certificates representing shares of Common Stock.
From and after the Distribution Date, the Company and the Rights Agent shall, if
the Company so directs, supplement or amend this Agreement without the approval
of any holders of Rights Certificates in order (i) to cure any ambiguity, (ii)
to correct or supplement any provision contained herein which may be defective
or inconsistent with any other provisions herein, (iii) to shorten or lengthen
any time period hereunder, or (iv) to change or supplement the provisions
hereunder in any manner which the Company may deem necessary or desirable and
which shall not adversely affect the interests of the holders of Rights
Certificates (other than an Acquiring Person or an Affiliate or Associate of an
Acquiring Person); provided, however, this Agreement may not be supplemented or
amended to lengthen, pursuant to clause (iii) of this sentence, (A) a time
period relating to when the Rights may be redeemed at such time as the Rights
are not then redeemable, or (B) any other time period unless such lengthening is
for the purpose of protecting, enhancing or clarifying the rights of, and/or the
benefits to, the holders of Rights. Upon the delivery of a certificate from an
appropriate officer of the Company which states that the proposed supplement or
amendment is in compliance with the terms of this Section 27, and if requested
by the Rights Agent, an opinion of counsel, the Rights Agent shall execute such
supplement or amendment. Prior to the Distribution Date, the interests of the
holders of Rights shall be deemed coincident with the interests of the holders
of Common Stock. Pursuant to any supplement or amendment of this Agreement, the
Rights Agent shall not be required to change or increase its duties or
obligations hereunder, unless agreed to in writing.

         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. DETERMINATIONS AND ACTIONS BY THE BOARD OF DIRECTORS, ETC.
For all purposes of this Agreement, any calculation of the number of shares of
Common Stock outstanding at any particular time, including for purposes of
determining the particular percentage of such outstanding shares of Common Stock
of which any Person is the Beneficial Owner, shall be made in accordance with
the last sentence of Rule 13d-3(d)(1)(i) of the General Rules and Regulations
under the Exchange Act. The Board of Directors of the Company shall have the
exclusive power and authority to administer this Agreement and to exercise all
rights and powers specifically granted to the Board or 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 a determination to redeem or not
redeem the Rights or to amend the Agreement). All such actions, calculations,
interpretations and determinations (including, for purposes of clause (y) below,
all omissions with respect to the foregoing) which are done or made by the Board
in good faith, shall (x) be final, conclusive and binding on the Company, the
Rights Agent, the holders of the Rights and all other parties, and (y) not
subject the Board to any liability to the holders of the Rights.

         SECTION 30. BENEFITS OF THIS AGREEMENT. Nothing in this Agreement shall
be construed to give to any person other than the Company, the Rights Agent and
the registered holders of the Rights Certificates (and, prior to the
Distribution Date, registered holders of the Common Stock) any legal or
equitable right, remedy or claim under this Agreement; but this Agreement shall
be for the sole and exclusive benefit of the Company, the Rights Agent and the
registered holders of the Rights Certificates (and, prior to the Distribution
Date, registered holders of the Common Stock).


                                       32


<PAGE>   35

         SECTION 31. SEVERABILITY. If any term, provision, covenant or
restriction of this Agreement is held by a court of competent jurisdiction or
other authority to be invalid, void or unenforceable, the remainder of the
terms, provisions, covenants and restrictions of this Agreement shall remain in
full force and effect and shall in no way be affected, impaired or invalidated;
provided, however, that notwithstanding anything in this Agreement to the
contrary, if any such term, provision, covenant or restriction is held by such
court or authority to be invalid, void or unenforceable and the Board of
Directors of the Company determines in its good faith judgment that severing the
invalid language from this Agreement would adversely affect the purpose or
effect of this Agreement, the right of redemption set forth in Section 23 hereof
shall be reinstated and shall not expire until the Close of Business on the
tenth day following the date of such determination by the Board of Directors.

         SECTION 32. GOVERNING LAW. This Agreement, each Right and each Rights
Certificate issued hereunder shall be deemed to be a contract made under the
laws of the State of Delaware and for all purposes shall be governed by and
construed in accordance with the laws of such State applicable to contracts made
and to be performed entirely within such State, except for Sections 18, 19, 20
and 21 hereof, which for all purposes shall be governed by and construed in
accordance with the laws of the State of New Jersey.

         SECTION 33. COUNTERPARTS. This Agreement may be executed in any number
of counterparts and each such counterpart 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 HEADINGS. Descriptive headings of the several
Sections of this Agreement are inserted for convenience only and shall not
control or affect the meaning or construction of any of the provisions hereof.

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


                                     DATUM INC.,
                                     a Delaware corporation


                                     /s/ DAVID A. YOUNG
                                     ----------------------------------
                                     Name:  David A. Young
                                     Title: Chief Financial Officer


                                     CHASEMELLON SHAREHOLDER SERVICES, L.L.C.,
                                     a New Jersey limited liability company


                                     /s/ MARTHA MIJANGO
                                     ----------------------------------
                                     Name:  Martha Mijango
                                     Title: Assistant Vice President


                                       33
<PAGE>   36

                                    EXHIBIT A

                CERTIFICATE OF DESIGNATION OF RIGHTS, PREFERENCES
                                AND PRIVILEGES OF

                  SERIES A JUNIOR PARTICIPATING PREFERRED STOCK

                                       OF

                                   DATUM INC.

             Pursuant to Section 151 of the General Corporation Law
                            of the State of Delaware

        Erik van der Kaay, the President and Chief Executive Officer, and David
A. Young, the Chief Financial Officer and Secretary of Datum Inc., a corporation
organized and existing under the General Corporation Law of the State of
Delaware, in accordance with the provisions of Section 103 thereof, DO HEREBY
CERTIFY:

        That pursuant to the authority conferred upon the Board of Directors by
the Certificate of Incorporation of the said Corporation, the said Board of
Directors on November 8, 1999 adopted the following resolution creating a series
of 150,000 shares of Preferred Stock designated as Series A Junior Participating
Preferred Stock:

        "RESOLVED, that pursuant to the authority vested in the Board of
Directors of the corporation by the Certificate of Incorporation, the Board of
Directors does hereby provide for the issue of a series of Preferred Stock,
$0.25 par value, of the Corporation, to be designated "Series A Junior
Participating Preferred Stock," initially consisting of 150,000 shares and to
the extent that the designations, powers, preferences and relative and other
special rights and the qualifications, limitations and restrictions of the
Series A Junior Participating Preferred Stock are not stated and expressed in
the Certificate of Incorporation, does hereby fix and herein state and express
such designations, powers, preferences and relative and other special rights and
the qualifications, limitations and restrictions thereof, as follows (all terms
used herein which are defined in the Certificate of Incorporation shall be
deemed to have the meanings provided therein):

        Section 1. Designation and Amount. The shares of such series shall be
designated as "Series A Junior Participating Preferred Stock," par value $0.25
per share, and the number of shares constituting such series shall be 150,000.

        Section 2. Dividends and Distributions.

                   (A) Subject to the prior and superior right of the holders of
any shares of any series of Preferred Stock ranking prior and superior to the
shares of Series A Junior Participating Preferred Stock with respect to
dividends, the holders of shares of Series A Junior Participating Preferred
Stock shall be entitled to receive when, as and if declared by the Board of
Directors out of funds legally available for the purpose, quarterly dividends
payable in cash on the last day of September, December, March and June in each
year (each such date being referred to herein as a "Quarterly Dividend Payment
Date"), commencing on the first Quarterly Dividend Payment Date


<PAGE>   37

after the first issuance of a share or fraction of a share of Series A Junior
Participating Preferred Stock, in an amount per share (rounded to the nearest
cent) equal to, subject to the provision for adjustment hereinafter set forth,
100 times the aggregate per share amount of all cash dividends, and 100 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 of the Corporation (the "Common Stock")
since the immediately preceding Quarterly Dividend Payment Date, or, with
respect to the first Quarterly Dividend Payment Date, since the first issuance
of any share or fraction of a share of Series A Junior Participating Preferred
Stock. In the event the Corporation shall at any time after November 8, 1999
(the "Rights Declaration Date") (i) declare any dividend on Common Stock payable
in shares of Common Stock, (ii) subdivide the outstanding Common Stock, or (iii)
combine the outstanding Common Stock into a smaller number of shares, then in
each such case, the amount to which holders of shares of Series A Junior
Participating Preferred Stock were entitled immediately prior to such event
under the preceding sentence shall be adjusted by multiplying such amount by a
fraction, the numerator of which is the number of shares of Common Stock
outstanding immediately after such event and the denominator of which is the
number of shares of Common Stock that were outstanding immediately prior to such
event.

                   (B) The Corporation shall declare a dividend or distribution
on the Series A Junior Participating Preferred Stock as provided in paragraph
(A) above immediately after it declares a dividend payable in shares of Common
Stock.

                   (C) Dividends shall begin to accrue and be cumulative on
outstanding shares of Series A Junior Participating Preferred Stock from the
Quarterly Dividend Payment Date next preceding the date of issue of such shares
of Series A Junior Participating Preferred Stock, unless the date of issue of
such shares is prior to the record date 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 Participating Preferred Stock entitled to receive a
quarterly dividend and before such Quarterly Dividend Payment Date, in either of
which events such dividends shall begin to accrue and be cumulative from such
Quarterly Dividend Payment Date. Accrued but unpaid dividends shall not bear
interest. Dividends paid on the shares of Series A Junior Participating
Preferred Stock in an amount less than the total amount of such dividends at the
time accrued and payable on such shares shall be allocated pro rata on a
share-by-share basis among all such shares at the time outstanding. The Board of
Directors may fix a record date for the determination of holders of shares of
Series A Junior Participating Preferred Stock entitled to receive payment of a
dividend or distribution declared thereon, which record date shall be no more
than thirty (30) days prior to the date fixed for the payment thereof.

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

                   (A) Subject to the provision for adjustment hereinafter set
forth, each share of Series A Junior Participating Preferred Stock shall entitle
the holder thereof to 100 votes on all matters submitted to a vote of the
stockholders of the Corporation. In the event the Corporation shall at any time
after the Rights Declaration Date (i) declare any dividend on Common Stock
payable in shares of Common Stock, (ii) subdivide the outstanding Common Stock,
or (iii) combine the outstanding Common Stock into a smaller number of shares,
then in each such case the number of


                                       2

<PAGE>   38

votes per share to which holders of shares of Series A Junior Participating
Preferred Stock were entitled immediately prior to such event shall be adjusted
by multiplying such number by a fraction, the numerator of which is the number
of shares of Common Stock outstanding immediately after such event and the
denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event.

                   (B) Except as otherwise provided herein or by law, the
holders of shares of Series A Junior Participating Preferred Stock and the
holders of shares of Common Stock shall vote together as one class on all
matters submitted to a vote of stockholders of the Corporation.

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

        Section 4. Certain Restrictions.

                   (A) The Corporation shall not declare any dividend on, make
any distribution on, or redeem or purchase or otherwise acquire for
consideration any shares of Common Stock after the first issuance of a share or
fraction of a share of Series A Junior Participating Preferred Stock unless
concurrently therewith it shall declare a dividend on the Series A Junior
Participating Preferred Stock as required by Section 2 hereof.

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

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

                       (ii) declare or pay dividends on, 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 Series A Junior
Participating Preferred Stock, except dividends paid ratably on the Series A
Junior Participating Preferred stock and all such parity stock on which
dividends are payable 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 on a parity (either as to dividends or
upon liquidation, dissolution or winding up) with the Series A Junior
Participating Preferred Stock, provided that the Corporation may at any time
redeem purchase or otherwise acquire shares of any such parity stock in exchange
for shares of any stock of the Corporation ranking junior (either as to
dividends or upon dissolution, liquidation or winding up) to the Series A Junior
Participating Preferred Stock; or

                       (iv) purchase or otherwise acquire for consideration any
shares of Series A Junior Participating Preferred Stock, or any shares of stock
ranking on a parity with the Series A


                                       3

<PAGE>   39

Junior Participating 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.

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

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

        Section 6. Liquidation, Dissolution or Winding Up.

                   (A) Upon any liquidation (voluntary or otherwise),
dissolution or winding up of the Corporation, no distribution shall be made to
the holders of shares of stock ranking junior (either as to dividends or upon
liquidation, dissolution or winding up) to the Series A Junior Participating
Preferred Stock unless, prior thereto, the holders of shares of Series A Junior
Participating Preferred Stock shall have received an amount equal to accrued and
unpaid dividends and distributions thereon, whether or not declared, to the date
of such payment, plus an amount equal to the greater of (1) $100.00 per share,
provided that in the event the Corporation does not have sufficient assets,
after payment of its liabilities and distribution to holders of Preferred Stock
ranking prior to the Series A Junior Participating Preferred Stock, available to
permit payment in full of the $100.00 per share amount, the amount required to
be paid under this Section 6(A)(1) shall, subject to Section 6(B) hereof, equal
the value of the amount of available assets divided by the number of outstanding
shares of Series A Junior Participating Preferred Stock or (2) subject to the
provisions for adjustment hereinafter set forth, 100 times the aggregate per
share amount to be distributed to the holders of Common Stock (the greater of
(1) or (2), the "Series A Liquidation Preference"). In the event the Corporation
shall at any time after the Rights Declaration Date (i) declare any dividend on
Common Stock payable in shares of Common Stock, (ii) subdivide the outstanding
Common Stock, or (iii) combine the outstanding Common Stock into a smaller
number of shares, then in each such case the amount to which holders of shares
of Series A Junior Participating Preferred Stock were entitled immediately prior
to such event under clause (2) 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 that were 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) In the event, however, that there are not sufficient
assets available to permit payment in full of the Series A Liquidation
Preference and the liquidation preferences of all other series of Preferred
Stock, if any, which rank on a parity with the Series A Junior Participating
Preferred Stock, then such remaining assets shall be distributed ratably to the
holders of such parity shares in proportion to their respective liquidation
preferences.


                                       4


<PAGE>   40

        Section 7. Consolidation, Merger, etc. In case the Corporation shall
enter into any consolidation, merger, combination or other transaction in which
the shares of Common Stock are exchanged for or changed into other stock or
securities, cash and/or any other property, then in any such case the shares of
Series A Junior Participating Preferred Stock shall at the same time be
similarly exchanged or changed in amount per share (subject to the provision for
adjustment hereinafter set forth) equal to 100 times the aggregate amount of
stock, securities, cash and/or any other property (payable in kind), as the case
may be, into which or for which each share of Common Stock is changed or
exchanged. In the event the Corporation shall at any time after the Rights
Declaration Date (i) declare any dividend on Common Stock payable in shares of
Common Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine the
outstanding Common Stock into a smaller number of shares, then in each such case
the amount set forth in the preceding sentence with respect to the exchange or
change of shares of Series A Junior Participating Preferred Stock shall be
adjusted by multiplying such amount by a fraction the numerator of which is the
number of shares of Common Stock outstanding immediately after such event and
the denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event.

        Section 8. Redemption. The shares of Series A Junior Participating
Preferred Stock shall not be redeemable.

        Section 9. Ranking. The Series A Junior Participating Preferred Stock
shall rank junior to all other series of the Corporation's Preferred Stock as to
the payment of dividends and the distribution of assets, unless the terms of any
such series shall provide otherwise. The Series A Junior Participating Preferred
Stock shall rank senior to the Corporation's Common Stock.

        Section 10. Amendment. The Certificate of Incorporation of the
Corporation shall not be further amended in any manner which would materially
alter or change the powers, preference or special rights of the Series A Junior
Participating Preferred Stock so as to affect them adversely without the
affirmative vote of the holders of a majority or more of the outstanding shares
of Series A Junior Participating Preferred Stock, voting separately as a class.

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

        IN WITNESS WHEREOF, we have executed and subscribed this Certificate and
do affirm the foregoing as true under the penalties of perjury this 8th day of
November 1999.



                                           -------------------------------------
                                           Erik van der Kaay,
                                           President and Chief Executive Officer

ATTEST:


- -----------------------
David A. Young
Chief Financial Officer
and Secretary


                                       5
<PAGE>   41

                                    EXHIBIT B

                           Form of Rights Certificate

Certificate No. R-____________                                  _________ Rights

        NOT EXERCISABLE AFTER NOVEMBER 22, 2009 OR EARLIER IF TERMINATED BY THE
        COMPANY. THE RIGHTS ARE SUBJECT TO REDEMPTION, AT THE OPTION OF THE
        COMPANY, AT $0.01 PER RIGHT ON THE TERMS SET FORTH IN THE RIGHTS
        AGREEMENT. UNDER CERTAIN CIRCUMSTANCES, RIGHTS BENEFICIALLY OWNED BY AN
        ACQUIRING PERSON OR AN AFFILIATE OR ASSOCIATE OF AN ACQUIRING PERSON (AS
        SUCH TERMS ARE DEFINED IN THE RIGHTS AGREEMENT) AND ANY SUBSEQUENT
        HOLDER OF SUCH RIGHTS MAY BECOME NULL AND VOID. [THE RIGHTS REPRESENTED
        BY THIS RIGHTS CERTIFICATE ARE OR WERE BENEFICIALLY OWNED BY A PERSON
        WHO WAS OR BECAME AN ACQUIRING PERSON OR AN AFFILIATE OR ASSOCIATE OF AN
        ACQUIRING PERSON (AS SUCH TERMS ARE DEFINED IN THE RIGHTS AGREEMENT).
        ACCORDINGLY, THIS RIGHTS CERTIFICATE AND THE RIGHTS REPRESENTED HEREBY
        MAY BECOME NULL AND VOID IN THE CIRCUMSTANCES SPECIFIED IN SECTION 7(e)
        OF SUCH RIGHTS AGREEMENT.]*

                               Rights Certificate

        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 November 8, 1999
as such agreement may be amended from time to time in accordance with its terms
(the "Rights Agreement"), between Datum Inc., a Delaware corporation (the
"Company"), and ChaseMellon Shareholder Services, L.L.C., a New Jersey limited
liability company (the "Rights Agent"), to purchase from the Company at any time
after the Distribution Date (as such term is defined in the Rights Agreement)
and prior to 5:00 P.M., Pacific Coast time, on November 22, 2009 at the office
of the Rights Agent designated for such purpose, or at the office of its
successor as Rights Agent, one one-hundredth of a fully paid non-assessable
share of Series A Junior Participating Preferred Stock (the "Preferred Shares"),
of the Company, at a purchase price of $48 per one one-hundredth of a Preferred
Share (the "Purchase Price"), upon presentation and surrender of this Rights
Certificate with the form of Election to Purchase and related Certificate duly
executed. The number of Rights evidenced by this Rights Certificate (and the
number of one-hundredths of a Preferred Share which may be purchased upon
exercise hereof) set forth above, are the number and Purchase Price as of
November 22, 1999, based on the Preferred Shares as constituted at such date. As
provided in the Rights Agreement, the Purchase Price and the number and kind of
Preferred Shares or other securities which may be purchased upon the exercise of
the Rights evidenced by this Rights Certificate are subject to modification and
adjustment upon the happening of certain events.

        This Rights Certificate is subject to all of the terms, covenants and
restrictions  of the Rights Agreement, which terms, covenants and restrictions
are hereby incorporated herein by reference and made a part hereof and to which
Rights Agreement reference is hereby made for a full description of the rights,
limitations of rights, obligations, duties and immunities hereunder of the


- ---------------------
* The portion of the legend in bracket shall be inserted only if applicable and
  shall replace the preceding sentence.

<PAGE>   42

Rights Agent, the Company and the holders of the Rights Certificates, which
limitations of rights include the temporary suspension of the exercisability of
such Rights under the specific circumstances set forth in the Rights Agreement.
Copies of the Rights Agreement are on file at the principal executive offices of
the Company and the above-mentioned office of the Rights Agent.

        Subject to the provisions of the Rights Agreement, the Rights evidenced
by this Rights Certificate (i) may be redeemed by the Company, at its option, at
a redemption price of $0.01 per Right or (ii) may be exchanged by the Company in
whole or in part for Common Shares, substantially equivalent rights or other
consideration as determined by the Company.

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

        No fractional portion less than integral multiples of one one-hundredth
of a Preferred Share will be issued upon the exercise of any Right or Rights
evidenced hereby but in lieu thereof a cash payment will be made, as provided in
the Rights Agreement.

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

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

        WITNESS the facsimile signature of the proper officers of the Company
and its corporate seal. Dated as of _________, _____.


ATTEST:                                  DATUM INC.


                                         By:
                                             -----------------------------------
[Secretary]


Countersigned:

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


By:
   -------------------------------------
            Authorized Signature


                                       2

<PAGE>   43

                   Form of Reverse Side of Rights Certificate

                               FORM OF ASSIGNMENT

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


         FOR VALUE RECEIVED
                           -----------------------------------------------------
hereby sells, assigns and transfers unto

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

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


Dated:
       --------------------------


                                                 Signature


Signature Guaranteed:

        The signatures should be guaranteed by an eligible guarantor institution
(banks, stock brokers, savings and loan associations and credit unions with
members in an approved signature guarantee medallion program) pursuant to S.E.C.
Rule 17Ad-15.


                                       3

<PAGE>   44

                                   CERTIFICATE

        The undersigned hereby certifies by checking the appropriate boxes that:

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

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


Dated: _____________________


                                              Signature


Signature Guaranteed:

        The signatures should be guaranteed by an eligible guarantor institution
(banks, stock brokers, savings and loan associations and credit unions with
members in an approved signature guarantee medallion program) pursuant to S.E.C.
Rule 17Ad-15.


                                       4

<PAGE>   45

Form of Reverse Side of Rights Certificate -- continued

                          FORM OF ELECTION TO PURCHASE

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

To:
   -------------------------------

        The undersigned hereby irrevocable elects to exercise ________________
Rights represented by this Rights Certificate to purchase the number of
one-hundredths of a Preferred Share issuable upon the exercise of such Rights
and requests that certificates for such number of one-hundredths of a Preferred
Share be issued in the name of:

Please insert social security or other identifying number ______________________

         ______________________________________________________________

         ______________________________________________________________

         ______________________________________________________________
                         (Please print name and address)

If such number of Rights shall not be all the Rights evidenced by this Rights
Certificate, a new Rights 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:

        The signatures should be guaranteed by an eligible guarantor institution
(banks, stock brokers, savings and loan associations and credit unions with
members in an approved signature guarantee medallion program) pursuant to S.E.C.
Rule 17Ad-15.


                                       5

<PAGE>   46

                                   CERTIFICATE

        The undersigned hereby certifies by checking the appropriate boxes that:

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

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


Dated: _____________________


                                                 Signature


Signature Guaranteed:

         The signatures should be guaranteed by an eligible guarantor
institution (banks, stock brokers, savings and loan associations and credit
unions with members in an approved signature guarantee medallion program)
pursuant to S.E.C. Rule 17Ad-15.


                                       6

<PAGE>   47

             Form of Reverse Side of Rights Certificate -- continued

                                     NOTICE

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



                                       7


<PAGE>   48

                                    EXHIBIT C

                                SUMMARY OF TERMS

                                 RIGHTS PLAN FOR

                                   DATUM INC.

        On November 8, 1999, the Board of Directors of Datum Inc. (the
"Corporation") approved the adoption of a Rights Plan and declared a dividend
distribution of one Right for each outstanding share of Datum Inc. Common Stock
to stockholders of record on the close of business on November 22, 1999 (the
"Dividend Date"). Each Right entitles the registered holder to purchase from the
Corporation a unit consisting of one one-hundredth of a share (a "Unit") of
Series A Junior Participating Preferred Stock, par value $0.25 per share (the
"Preferred Stock"), at a purchase price of $48 per Unit, subject to adjustment.
The description and terms of the Rights are set forth in a Rights Agreement (the
"Rights Agreement") between the Corporation and ChaseMellon Shareholder
Services, L.L.C., a New Jersey limited liability company, as Rights Agent.

        Certificates. Initially, the Rights will be attached to all Common Stock
certificates representing shares then outstanding, and no separate Rights
Certificates will be distributed. Subject to extension by the Board of Directors
in certain circumstances, the Rights will separate from the Common Stock and a
distribution date (the "Distribution Date") will occur upon the earlier of (i)
10 days following a public announcement that a person or group of affiliated or
associated persons (an "Acquiring Person") has acquired, or obtained the right
to acquire, beneficial ownership of fifteen percent (15%) or more of the
outstanding shares of Common Stock (the "Stock Acquisition Date"); or (ii) 10
business days following the commencement of a tender offer or exchange offer
that would result in a person or group beneficially owning fifteen percent (15%)
or more of the outstanding shares of Common Stock. Until the Distribution Date,
(i) the Rights will be evidenced by the Common Stock certificates and will be
transferred with and only with such Common Stock certificates; (ii) new Common
Stock certificates issued will contain a notation incorporating the Rights
Agreement by reference; and (iii) the surrender for transfer of any certificates
for Common Stock outstanding will also constitute the transfer of the Rights
associated with the Common Stock represented by such certificate.

        Expiration and Exercise. The Rights are not exercisable until the
Distribution Date and will expire at the close of business on November 22, 2009,
unless earlier redeemed by the Corporation as described below.

        As soon as practicable after the Distribution Date, Rights Certificates
will be mailed to holders of record of the Common Stock as of the close of
business on the Distribution Date and, thereafter, the separate Rights
Certificates will represent the Rights. Except as otherwise determined by the
Board of Directors, only shares of Common Stock issued prior to the Distribution
Date will be issued with Rights.

        "Flip-In". In the event that, at any time following the Dividend Date,
(i) the Corporation is the surviving corporation in a merger with an Acquiring
Person and its Common Stock is not changed or exchanged; (ii) an Acquiring
Person becomes the beneficial owner of more than fifteen percent (15%) of the
outstanding shares of Common Stock; (iii) an Acquiring Person

<PAGE>   49

engages in one or more "self-dealing" transactions as set forth in the Rights
Agreement; or (iv) during such time as there is an Acquiring Person, an event
occurs which results in such Acquiring Person's ownership interest being
increased by more than one-half of one percent (0.5%) (e.g., a reverse stock
split), each holder of a Right will thereafter have the right to receive, upon
exercise, Common Stock (or, in certain circumstances, cash, property or other
securities of the Corporation) having a value equal to two times the exercise
price of the Right. Notwithstanding any of the foregoing, following the
occurrence of any of the events set forth in this paragraph, all Rights that
are, or (under certain circumstances specified in the Rights Agreement) were,
beneficially owned by any Acquiring Person will be null and void. However,
Rights are not exercisable following the occurrence of any of the events set
forth above until such time as the Rights are no longer redeemable by the
Corporation as set forth below.

        For example, at an exercise price of $48 per Right, each Right not owned
by an Acquiring Person (or by certain related parties) following an event set
forth in the preceding paragraph would entitle its holder to purchase $96 worth
of Common Stock (or other consideration, as noted above) for $48. Assuming that
the Common Stock had a per share value of $8 at such time, the holder of each
valid Right would be entitled to purchase 12 shares of Common Stock for $48.

        Permitted Offer. A tender or exchange offer for all outstanding Common
Stock at a price and on terms determined by the Board of Directors prior to the
purchase to be adequate and in the best interests of the Corporation and its
stockholders (other than the Acquiring Person) is a Permitted Offer under the
Rights Agreement. A Permitted Offer does not trigger the exercisability of the
Rights.

        "Flip-Over". In the event that, at any time following the Stock
Acquisition Date, (i) the Corporation is acquired in a merger or other business
combination transaction in which the Corporation is not the surviving
corporation; or (ii) 50% or more of the Corporation's assets or earning power is
sold or transferred, each holder of a Right (except Rights which previously have
been voided as set forth above) shall thereafter have the right to receive, upon
exercise, common stock of the acquiring company (or, in certain circumstances,
its parent) having a value equal to two times the exercise price of the Right.
The events set forth in this paragraph and in the third preceding paragraph are
referred to as the "Triggering Events."

        Exchange Feature. At any time after any Person becomes an Acquiring
Person and prior to the acquisition by such person or group of 50% or more of
the outstanding Common Stock, the Board of Directors may exchange the Rights
(other than Rights owned by such Person or group which will have become void),
in whole or in part, at an exchange rate of one share of Common Stock (or a
combination of cash, property, Common Stock or other securities having an equal
value) per Right (subject to adjustment).

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


                                       2


<PAGE>   50

        With certain exceptions, no adjustment in the purchase price will be
required until cumulative adjustments amount to at least 1% of the purchase
price. No fractional Units will be issued and, in lieu thereof, an adjustment in
cash will be made based on the market price of the Preferred Stock on the last
trading date prior to the date of exercise.

        Redemption. At any time until ten days following the Stock Acquisition
Date (subject to extension by the Continuing Directors, as defined in the Rights
Agreement), the Corporation may redeem the Rights in whole, but not in part, at
a price of $0.01 per Right. Under certain circumstances set forth in the Rights
Agreement, the decision to redeem shall require the concurrence of a majority of
the Continuing Directors. After the redemption period has expired, the
Corporation's right of redemption may be reinstated if an Acquiring Person
reduces his beneficial ownership to less than fifteen percent (15%) of the
outstanding shares of the Common Stock in a transaction or series of
transactions not involving the Corporation. Immediately upon the action of the
Board of Directors ordering redemption of the Rights, with (where required) the
concurrence of the Continuing Directors, the Rights will terminate and the only
right of the holders of Rights will be to receive the $0.01 redemption price.
Rights are not exercisable while subject to redemption.

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

        Amendments. Other than those provisions relating to the principal
economic terms of the Rights, any of the provisions of the Rights Agreement may
be amended by the Board of Directors of the Corporation prior to the
Distribution Date. After the Distribution Date, the provisions of the Rights
Agreement may be amended by the Board (in certain circumstances, with the
concurrence of the Continuing Directors) in order to cure any ambiguity, to make
changes which do not adversely affect the interests of holders of Rights
(excluding the interests of any Acquiring Person), or to shorten or lengthen any
time period under the Rights Agreement; provided, however, that no amendment to
adjust the time period governing redemption shall be made at such time as the
Rights are not redeemable.

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



                                       3


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