NCI BUILDING SYSTEMS INC
8-A12B, 1998-07-20
PREFABRICATED METAL BUILDINGS & COMPONENTS
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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

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

                           NCI BUILDING SYSTEMS, INC.
             (Exact name of registrant as specified in its charter)



  DELAWARE                                                  76-0127701
(State or other                                            (I.R.S. Employer
jurisdiction of                                          Identification No.)
incorporation)


                                 7301 FAIRVIEW
                             HOUSTON, TEXAS  77041
                    (Address of principal executive offices)

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

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

Preferred Stock Purchase Rights               New York Stock Exchange

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

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

         Securities Act registration statement file number to which this form
relates: ___________ (if applicable)

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

                                 Title of Class
                                 --------------
                                      None
<PAGE>   2
Item 1.  Description of Registrant's Securities to be Registered.

         On June 24, 1998, the Board of Directors (the "Board") of NCI Building
Systems, Inc. (the "Company") declared a dividend of one preferred stock
purchase right ("Right") for each outstanding share of common stock, $0.01 par
value ("Common Stock"), of the Company.  The dividend is payable on July 22,
1998 to stockholders of record at the close of business on July 8, 1998 (the
"Record Date").  Each Right entitles the registered holder to purchase from the
Company one one-hundredth (1/100th) of a share of the Company's Series A Junior
Participating Preferred Stock ("Series A Preferred Stock") at a purchase price
of $125.00, in each case after giving effect to and taking into account a
concurrent 2 for 1 split of the Common Stock of the Company.  The terms and
conditions of the Rights are set forth in that certain Rights Agreement, dated
June 24, 1998 by and between the Company and Harris Trust and Savings Bank.

         Initially the Rights will not be exercisable, certificates for the
Rights will not be issued and the Rights will automatically trade with the
Common Stock.  Until the Distribution Date (as hereinafter defined) or the
earlier redemption, exchange or expiration of the Rights, the Rights will be
represented by the Common Stock certificates and will be transferred with, and
only with, the Common Stock.  Until the Distribution Date (or the earlier
redemption, exchange or expiration of the Rights), all new Common Stock
certificates issued by the Company will contain a legend incorporating the
Rights Agreement by reference and the surrender for transfer of any of the
Company's Common Stock certificates, with or without the aforesaid legend, will
also constitute the simultaneous transfer of the Rights associated with the
Common Stock represented by such certificate.  As soon as practicable following
the Distribution Date, separate Right Certificates ("Rights Certificates") will
be mailed to holders of record of Common Stock at the close of business on the
Distribution Date, and, thereafter, the Right Certificates alone will evidence
the Rights, and the Rights will be transferable separate and apart from the
Common Stock.

         The Distribution Date will occur on the (i) fifteenth day following a
public announcement that a person or group of affiliated or associated persons,
other than the Company, any subsidiary of the Company or any employee benefit
plan or employee stock plan of the Company (each, an "Exempt Person"), has
acquired, or has obtained the right to acquire, beneficial ownership of 20% or
more of the outstanding Common Stock other than by reason of  an original
issuance from the Company or as a result of repurchases of shares by the
Company (each, an "Acquiring Person")  (the "Stock Acquisition Date") or (ii)
fifteenth business day following the commencement of or public announcement of
the intent by any Person other than an Exempt Person to commence a tender or
exchange offer which, if consummated, would result in the ownership by such
Person of 20% or more of the outstanding Common Stock, irrespective of whether
any shares of Common Stock are acquired pursuant to such offer (such dates
referenced in clauses (i) or (ii) above being called the "Distribution Date").
The Rights Agreement provides that the Distribution Date may be extended by the
Continuing Directors (as hereinafter defined) prior to the expiration of the
time periods referenced in the preceding sentence.

         A "Continuing Director" is a member of the Board who either (i) is not
an Acquiring Person or a person who is at the time engaged in a tender or
exchange offer that could result in that person's becoming the beneficial owner
of 20% or more of the outstanding Common Stock (or an affiliate or an associate
of either of the foregoing) and who was a member of the Board before the time
the Acquiring Person became an Acquiring Person or the tender or exchange offer
began or (ii) is not an Acquiring Person or a person who is at the time engaged
in a tender or exchange offer that could result in that person's becoming the
beneficial owner of 20% or more of the outstanding Common Stock (or an
affiliate or an associate of either of the foregoing) and was recommended to
serve on the Board by a majority of Continuing Directors.

         The Rights are not exercisable until the Distribution Date.  The
Rights will expire at the close of business on June 24, 2008, unless redeemed
or exchanged earlier as described below.

         The Series A Preferred Stock will be nonredeemable and, unless
otherwise provided in connection with the creation of a subsequent series of
preferred stock, will be subordinate to all other series of the Company's
preferred stock.  The Series A Preferred Stock will not be issued except upon
exercise of Rights.  Each share of Series A Preferred





                                       1
<PAGE>   3
Stock will be entitled to receive, when, as and if declared, a quarterly
dividend in an amount equal to 100 times the quarterly cash dividend declared
on the Company's Common Stock.  In addition, the Series A Preferred Stock is
entitled to 100 times any noncash dividends declared on the Common Stock, in
like kind.  In the event of dissolution, liquidation or winding-up of the
Company, the holders of Series A Preferred Stock will be entitled to receive a
liquidation payment in an amount equal to $100 per share, plus 100 times the
liquidation payment made per share of Common Stock.  Each share of Series A
Preferred Stock will have 100 votes, voting together with the Common Stock.  In
the event of any merger, consolidation or other transaction in which common
shares are exchanged, each share of Series A Preferred Stock will be entitled
to receive 100 times the amount received per share of Common Stock.  The rights
of the Series A Preferred Stock as to dividends, liquidation payments and
voting rights are protected by antidilution provisions.

         The Purchase Price payable and the number of shares of Series A
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 Series A Preferred Stock, (ii) upon the grant to
holders of the Series A Preferred Stock of certain rights or warrants to
subscribe for the purchase of Series A Preferred Stock or convertible
securities at less than the current market price of the Series A Preferred
Stock or (iii) upon the distribution to holders of the Series A Preferred Stock
of evidences of indebtedness or assets (excluding regular cash dividends and
dividends payable in Series A Preferred Stock) or of subscription rights or
warrants.

         If any person (other than an Exempt Person) becomes an Acquiring
Person, each holder of a Right, other than the Acquiring Person, will have the
right to receive, upon payment of the Purchase Price, in lieu of Series A
Preferred Stock, a number of shares of Common Stock having a market value equal
to twice the Purchase Price.  In lieu of issuing shares of Common Stock upon
exercise of Rights, the Company may, and to the extent that insufficient shares
of Common Stock are available for the exercise in full of the Rights, the
Company shall, issue cash, property or other securities of the Company, or any
combination thereof (which may be accompanied by a reduction in the Purchase
Price) in proportion determined by the Company, so that the aggregate value
received is equal to twice the Purchase Price.  Although the Rights Agreement
contains an exemption from the definition of an Acquiring Person for any person
to whom or which the Company directly issues shares of Common Stock (for
example, in a private placement or an acquisition by the Company in which
Common Stock is used as consideration), even if that person thereby would
become the beneficial owner of 20% or more of the Common Stock, such person may
nonetheless become an Acquiring Person thereafter if such person acquires any
additional shares of Common Stock.  Notwithstanding the foregoing, after the
acquisition of shares of Common Stock as described in this paragraph, Rights
that are (or, under certain circumstances, Rights that were) beneficially owned
by an Acquiring Person will be null and void.

         The Board may, at its option, at any time after a person becomes an
Acquiring Person, exchange all or part of the then outstanding and exercisable
Rights for shares of Common Stock at an exchange ratio of one share of Common
Stock per Right; provided, however, the Board may not effect such exchange
after the time that any Person becomes the beneficial owner of 50% or more of
the Common Stock then outstanding.

         If, after the Stock Acquisition Date, the Company is acquired in a
merger or other business combination (in which any shares of the Common Stock
are changed into or exchanged for other securities or assets) or more than 50%
of the assets or earnings power of the Company and its subsidiaries (taken as a
whole) are sold or transferred in one or a series of related transactions, the
Rights Agreement provides that proper provision shall be made so that each
holder of record of a Right (unless the Rights have been earlier redeemed) will
from and after that time have the right to receive, upon payment of the
Purchase Price, that number of shares of common stock of the acquiring company
which has a market value at the time of such transaction equal to twice the
Purchase Price.

         At any time after the date of the Rights Agreement until the time that
a person becomes an Acquiring Person, the Continuing Directors may redeem the
Rights in whole, but not in part, at a price of $0.01 per Right (the
"Redemption Price"), which may (at the option of the Company) be paid in cash,
shares of Common Stock or other consideration





                                       2
<PAGE>   4
deemed appropriate by the Continuing Directors.  Upon the effectiveness of any
action of the Board ordering redemption of the Rights, the Rights will
terminate and the only right of the holders of Rights will be to receive the
Redemption Price.

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

         The provisions of the Rights Agreement may be amended by the Company,
except that any amendment adopted after the time that a person becomes an
Acquiring Person may not adversely affect the interests of holders of Rights.

         As of July 8, 1998, there were 18,024,482 shares of Common Stock
outstanding and 3,248,734 shares of Common Stock reserved for issuance, in each
case adjusted to give effect to a 2 for 1 split of the Company's Common Stock
payable on or about July 22, 1998 to holders of the Common Stock of record as of
the close of business on July 8, 1998.  Each outstanding share of Common Stock
on July 8, 1998 will receive one Right.  Six hundred thousand (600,000) shares
of Series A Preferred Stock are reserved for issuance in the event of exercise
of the Rights.

         The Rights have certain anti-takeover effects.  The Rights will cause
substantial dilution to a person or group that attempts to acquire the Company
without conditioning the offer on the Rights being redeemed or a substantial
number of Rights being acquired, and under certain circumstances the Rights
beneficially owned by such a person or group may become void.  The Rights
should not interfere with any merger or other business combination approved by
the Board because, if the Rights would become exercisable as a result of such
merger or business combination, the Board at its option (and with the
concurrence of a majority of the Continuing Directors) may at any time prior to
the time that any Person becomes an Acquiring Person redeem all (but not less
than all) of the then outstanding Rights at the Redemption Price.

         The foregoing description of the Rights is qualified in its entirety
by reference to the Rights Agreement.

Item 2.  Exhibits.

         1       Certificate of Designation of Series A Junior Participating
                 Preferred Stock, dated June 26, 1998

         2       Rights Agreement, dated June 24, 1998, by and between the
                 Registrant and Harris Trust and Savings Bank

                                                                            



                                       3
<PAGE>   5
                                   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.



                                           NCI BUILDING SYSTEMS, INC.



                                           By:  /s/ Robert J. Medlock    
                                                ------------------------------
                                                Robert J. Medlock
                                                Vice President, Chief Financial
                                                Officer and Treasurer





                                       4
<PAGE>   6
                                EXHIBIT INDEX

<TABLE>
<CAPTION>

Exhibit          Description 
- -------          -----------
<S>              <C>
         1       Certificate of Designation of Series A Junior Participating
                 Preferred Stock, dated June 26, 1998

         2       Rights Agreement, dated June 24, 1998, by and between the
                 Registrant and Harris Trust and Savings Bank
</TABLE>
                                                                            

<PAGE>   1
                                                                      EXHIBIT 1

                           CERTIFICATE OF DESIGNATION
                                       OF
                 SERIES A JUNIOR PARTICIPATING PREFERRED STOCK
                                       OF
                           NCI BUILDING SYSTEMS, INC.

                        (Pursuant to Section 151 of the
                       Delaware General Corporation Law)

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

         NCI Building Systems, Inc., a corporation organized and existing under
the General Corporation Law of the State of Delaware (the "Corporation"),
hereby certifies that the following resolution was adopted by the Board of
Directors of the Corporation in accordance with Section 151 of the General
Corporation Law at a meeting duly called and held on June 24, 1998:

         RESOLVED, that, pursuant to the authority granted to and vested in the
         Board of Directors of this Corporation (the "Board of Directors" or
         the "Board") in accordance with the provisions of the Restated
         Certificate of Incorporation, the Board of Directors hereby creates a
         series of Preferred Stock, par value $1.00 per share (the "Preferred
         Stock"), of the Corporation and hereby states the designation and
         number of shares, and fixes the relative rights, preferences, and
         limitations thereof as follows:

         Series A Junior Participating Preferred Stock:

                 1.       Designation and Amount.  The shares of such series
         shall be designated as "Series A Junior Participating Preferred Stock"
         (the "Series A Preferred Stock") and the number of shares constituting
         the Series A Preferred Stock shall be 600,000.

                 Such number of shares may be increased or decreased by
         resolution of the Board of Directors; provided, that no decrease shall
         reduce the number of shares of Series A Preferred Stock to a number
         less than the number of shares then outstanding plus the number of
         shares reserved for issuance upon the exercise of outstanding options,
         rights, or warrants or upon the conversion of any outstanding
         securities issued by the Corporation convertible into Series A
         Preferred Stock.

                 2.       Dividends and Distributions.

                 (a)      Subject to the rights of the holders of any shares of
         any series of Preferred Stock (or any similar stock) ranking prior and
         superior to the Series A Preferred Stock with respect to dividends,
         the holders of shares of Series A Preferred Stock, in preference to
         the holders of Common Stock, par value $0.01 per share (the "Common
         Stock"), of the
<PAGE>   2
         Corporation, and of any other junior stock, shall be entitled to
         receive, when, as and if declared by the Board of Directors out of
         funds legally available for the purpose, quarterly dividends payable
         in cash on the first day of February, May, August and November in each
         year (each such date being referred to herein as a "Quarterly Dividend
         Payment Date"), commencing on the first Quarterly Dividend Payment
         Date after the first issuance of a share or fraction of a share of
         Series A Preferred Stock, in an amount per share (rounded to the
         nearest cent) equal, subject to the provision for adjustment
         hereinafter set forth, to 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 since the
         immediately preceding Quarterly Dividend Payment Date or, with respect
         to the first Quarterly Dividend Payment Date, since the first issuance
         of any share or fraction of a share of Series A Preferred Stock.  If
         the Corporation at any time declares or pays any dividend on the
         Common Stock payable in shares of Common Stock, or effects a
         subdivision or combination or consolidation of the outstanding shares
         of Common Stock (by reclassification or otherwise than by payment of a
         dividend in shares of Common Stock) into a greater or lesser number of
         shares of Common Stock, then in each such case the amount to which
         holders of shares of Series A Preferred Stock were entitled
         immediately before such event 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 before such event.

                 (b)      The Corporation shall declare a dividend or
         distribution on the Series A Preferred Stock as provided in Paragraph
         (a) of this Section immediately after it declares a dividend or
         distribution on the Common Stock (other than a dividend payable in
         shares of Common Stock).

                 (c)      Dividends shall begin to accrue and be cumulative on
         outstanding shares of Series A Preferred Stock from the Quarterly
         Dividend Payment Date next preceding the date of issue of such shares,
         unless the date of issue of such shares is before the record date for
         the first Quarterly Dividend Payment Date, in which case dividends on
         such shares shall begin to accrue from the date of issue of such
         shares, or unless the date of issue is a Quarterly Dividend Payment
         Date or is a date after the record date for the determination of
         holders of shares of Series A Preferred Stock entitled to receive a
         quarterly dividend and before such Quarterly Dividend Payment Date, in
         either of which events such dividends shall being to accrue and be
         cumulative from such Quarterly Dividend Payment Date.  Accrued but
         unpaid dividends shall not bear interest.  Dividends paid on the
         shares of Series A Preferred Stock in an amount less than the total
         amount of such dividends at the time accrued and payable on such
         shares shall be allocated pro rata on a share-by-share basis among all
         such shares at the time outstanding.  The Board of Directors may fix a
         record date for the determination of





                                       2
<PAGE>   3
         holders of shares of Series A Preferred Stock entitled to receive
         payment of a dividend or distribution declared thereon, which record
         date shall be not more than 60 days before the date fixed for the
         payment thereof.

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

                 (a)      Subject to the provision for adjustment hereinafter
         set forth, each share of Series A Preferred Stock shall entitle the
         holder thereof to 100 votes on all matters submitted to a vote of the
         shareholders of the Corporation.  If the Corporation at any time
         declares or pays any dividend on the Common Stock payable in shares of
         Common Stock, or effects a subdivision or combination or consolidation
         of the outstanding shares of Common Stock (by reclassification or
         otherwise than by payment of a dividend in shares of Common Stock)
         into a greater or lesser number of shares of Common Stock, then in
         each such case the number of votes per share to which holders of
         shares of Series A Preferred Stock were entitled immediately before
         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 before such event.

                 (b)      Except as otherwise provided herein, in any other
         Certificate of Designation creating a series of Preferred Stock or any
         similar stock, or by law, the holders of shares of Series A Preferred
         Stock and the holders of shares of Common Stock and any other capital
         stock of the Corporation having general voting rights shall vote
         together as one class on all matters submitted to a vote of
         shareholders of the Corporation.

                 (c)      Except as set forth herein, holders of Series A
         Preferred Stock shall have no voting rights.

                 4.       Certain Restrictions.

                 (a)      Whenever dividends or distributions payable on the
         Series A 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
         Preferred Stock outstanding have been paid in full, the Corporation
         shall not:

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

                          (ii)    declare or pay dividends, or make any other
                 distributions, on any shares of stock ranking in parity
                 (either as to dividends or upon liquidation,





                                       3
<PAGE>   4
                 dissolution or winding up) with the Series A Preferred Stock,
                 except dividends paid ratably on the Series A Preferred Stock
                 and all such parity stock on which dividends are payable or in
                 arrears in proportion to the total amounts to which the
                 holders of all such shares are then entitled;

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

                          (iv)    redeem or purchase or otherwise acquire for
                 consideration any shares of Series A Preferred Stock, or any
                 shares of stock ranking in parity with the Series A Preferred
                 Stock, except in accordance with a purchase offer made in
                 writing or by publication (as determined by the Board of
                 Directors) to all holders of such shares upon such terms as
                 the Board of Directors, after consideration of the annual
                 dividend rates and other relative rights and preferences of
                 the series and classes, shall determine in good faith will
                 result in fair and equitable treatment among the series or
                 classes.

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

                 5.       Reacquired Shares.  Any shares of Series A Preferred
         Stock purchased or otherwise acquired by the Corporation in any manner
         whatsoever shall be retired and canceled promptly after the
         acquisition thereof.  All such shares shall upon their cancellation
         become authorized but unissued shares of Preferred Stock and may be
         reissued as part of a new series of Preferred Stock subject to the
         conditions and restrictions on issuance set forth herein, in the
         Restated Certificate of Incorporation, in any other Certificate of
         Designations creating a series of Preferred Stock or similar stock, or
         as otherwise required by law.

                 6.       Liquidation, Dissolution or Winding Up.  Upon any
         liquidation, dissolution or winding up of the Corporation, no
         distribution shall be made (a) to the holders of shares of stock
         ranking junior (either as to dividends or upon liquidation,
         dissolution or winding up) to the Series A Preferred Stock unless,
         prior thereto, the holders of shares of Series A Preferred Stock shall
         have received $100 per share, plus an amount equal to accrued and
         unpaid dividends and distributions thereon, whether or not declared,
         to the date of such payment, provided that the holders of shares of
         Series A Preferred Stock shall be entitled to





                                       4
<PAGE>   5
         receive an aggregate amount per share, subject to the provision for
         adjustment hereinafter set forth, equal to 100 times the aggregate
         amount to be distributed per share to holders of shares of Common
         Stock, or (b) to the holders of shares of stock ranking in parity
         (either as to dividends or upon liquidation, dissolution or winding
         up) with the Series A Preferred Stock, except distributions made
         ratably on the Series A Preferred Stock and all such parity stock in
         proportion to the total amounts to which the holders of all such
         shares are entitled upon such liquidation, dissolution or winding up.
         If the Corporation at any time declares or pays any dividend on the
         Common Stock payable in shares of Common Stock, or effects a
         subdivision or combination or consolidation of the outstanding shares
         of Common Stock (by reclassification or otherwise than by payment of a
         dividend in shares of Common Stock) into a greater or lesser number of
         shares of Common Stock, then in each such case the aggregate amount to
         which holders of shares of Series A Preferred Stock were entitled
         immediately before such event under the provision in clause (a) of the
         preceding sentence shall be adjusted by multiplying such amount by a
         fraction, the numerator of which is the number of shares of Common
         Stock outstanding immediately after such event and the denominator of
         which is the number of shares of Common Stock that were outstanding
         immediately before such event.

                 7.       Consolidation, Merger, etc.  If the Corporation
         enters 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 or any other property,
         then in any such case each share of Series A Preferred Stock shall at
         the same time be similarly exchanged or changed into an amount per
         share, subject to the provision for adjustment hereinafter set forth,
         equal to 100 times the aggregate amount of stock, securities, cash 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.  If
         the Corporation at any time declares or pays any dividend on the
         Common Stock payable in shares of Common Stock, or effects a
         subdivision or combination or consolidation of the outstanding shares
         of Common Stock (by reclassification or otherwise than by payment of a
         dividend in shares of Common Stock) into a greater or lesser number of
         shares of Common Stock, then in each such case the amount set forth in
         the preceding sentence with respect to the exchange or change of
         shares of Series A Preferred Stock shall be adjusted by multiplying
         such amount by a fraction, the numerator of which is the number of
         shares of Common Stock outstanding immediately after such event and
         the denominator of which is the number of shares of Common Stock that
         were outstanding immediately before such event.

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

                 9.       Rank.  The Series A Preferred Stock shall rank, with
         respect to the payment of dividends and the distribution of assets,
         junior to all series and any other class of the Corporation's
         Preferred Stock.





                                       5
<PAGE>   6
                 10.      Amendment. The Restated Certificate of Incorporation
         of the Corporation shall not be amended in any manner that would
         materially alter or change the powers, preferences or special rights
         of the Series A Preferred Stock so as to affect them adversely without
         the affirmative vote of the holders of at least a majority of the
         outstanding shares of Series A Preferred Stock, voting together as a
         single series.

         IN WITNESS WHEREOF, this Certificate of Designation is executed on
behalf of the Corporation by its Vice President and Chief Financial Officer and
attested by its Secretary this 26th day of June, 1998.


                                                 NCI BUILDING SYSTEMS, INC.



                                                 By: /s/ Robert J. Medlock    
                                                     ------------------------
                                                     Robert J. Medlock
                                                     Vice President and Chief
                                                     Financial Officer



[SEAL]

ATTEST:



/s/ Donnie R. Humphries
- -------------------------------                                
Donnie R. Humphries
Secretary





                                       6

<PAGE>   1






                                                                       EXHIBIT 2


                                RIGHTS AGREEMENT



                                    between



                           NCI BUILDING SYSTEMS, INC.



                                      and



                         HARRIS TRUST AND SAVINGS BANK,

                                  Rights Agent





                           Dated as of June 24, 1998
<PAGE>   2
                               TABLE OF CONTENTS


<TABLE>
<CAPTION>
Section                                                                                                              Page
- -------                                                                                                              ----
<S>              <C>                                                                                                   <C>
Section 1.       Certain Definitions  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Section 2.       Appointment of Rights Agent  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Section 3.       Issue of Right Certificates  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Section 4.       Form of Right Certificates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Section 5.       Countersignature and Registration  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Section 6.       Transfer, Split Up, Combination, and Exchange of Right Certificates;
                 Mutilated, Destroyed, Lost, or Stolen Right Certificates . . . . . . . . . . . . . . . . . . . . . . . 8

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

Section 8.       Cancellation and Destruction of Right Certificates . . . . . . . . . . . . . . . . . . . . . . . . .  10

Section 9.       Reservation and Availability of Preferred Stock  . . . . . . . . . . . . . . . . . . . . . . . . . .  11

Section 10.      Preferred Stock Record Date  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12

Section 11.      Adjustment of Purchase Price, Number, and Kind of Shares, or Number
                 of Rights  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12

Section 12.      Certificate of Adjusted Purchase Price or Number of Shares . . . . . . . . . . . . . . . . . . . . .  20

Section 13.      Consolidation, Merger, or Sale or Transfer of Assets or Earning Power  . . . . . . . . . . . . . . .  20

Section 14.      Fractional Rights and Fractional Shares  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  22

Section 15.      Rights of Action . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23

Section 16.      Agreement of Rights Holders  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23

Section 17.      Right 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

</TABLE>




                                      -i-
<PAGE>   3
<TABLE>
<S>              <C>                                                                                                   <C>
Section 20.      Duties of Rights Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25

Section 21.      Change of Rights Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  28

Section 22.      Issuance of New Right Certificates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  28

Section 23.      Redemption and Termination; Exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  29

Section 24.      Notice of Certain Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31

Section 25.      Notices  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  32

Section 26.      Supplements and Amendments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33

Section 27.      Successors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33

Section 28.      Determinations and Actions by the Board of Directors, etc  . . . . . . . . . . . . . . . . . . . . .  33

Section 29.      Benefits of this Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34

Section 30.      Severability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34

Section 31.      Governing Law  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34

Section 32.      Counterparts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34

Section 33.      Descriptive Headings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34


Exhibit A        Certificate of Designation of Series A Junior Participating Preferred Stock

Exhibit B        Form of Right Certificate
</TABLE>





                                      -ii-
<PAGE>   4
                                RIGHTS AGREEMENT

         THIS RIGHTS AGREEMENT (this "Agreement"), dated as of June 24, 1998,
is by and between NCI Building Systems, Inc., a Delaware corporation (the
"Company"), and Harris Trust and Savings Bank, an Illinois banking corporation
(the "Rights Agent").

         The Board of Directors of the Company has authorized and declared a
distribution of one Right (as defined below) for each share of Common Stock,
par value $0.01, of the Company (the "Common Stock") outstanding at the close
of business on the Record Date (as defined below) and, in connection with that
declaration, has authorized the issuance of one Right for each share of Common
Stock of the Company issued between the Record Date and the Distribution Date
(as defined below).

         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 that,
         together with all Affiliates and Associates of such Person, is the
         Beneficial Owner of 20% or more of the voting power of the capital
         stock of the Company then outstanding, but shall not include the
         Company, any Subsidiary, any employee benefit plan of the Company or
         of any Subsidiary, or any Person organized, appointed or established
         by the Company or any Subsidiary for or pursuant to the terms of any
         such plan.

                 Notwithstanding the foregoing, no Person shall become an
         "Acquiring Person" as the result of (a) an acquisition of shares of
         capital stock of the Company by the Company which, by reducing the
         number of shares outstanding, increases the proportionate number of
         shares beneficially owned by such Person to 20% or more of the voting
         power of the capital stock of the Company then outstanding or (b) the
         acquisition by such Person of newly issued shares of capital stock
         directly from the Company (it being understood that a purchase from an
         underwriter or other intermediary is not directly from the Company);
         provided, however, that if a Person shall become the Beneficial Owner
         of 20% or more of the voting power of the capital stock of the Company
         then outstanding by reason of share purchases by the Company or the
         receipt of newly issued shares of capital stock directly from the
         Company and shall, after such share purchases or direct issuance by
         the Company, become the Beneficial Owner of any additional shares of
         capital stock of the Company, then such Person shall be deemed to be
         an "Acquiring Person"; provided further, however, that any transferee
         from such Person who becomes the Beneficial Owner of 20% or more of
         the voting power of the capital stock of the Company then outstanding
         shall nevertheless be deemed to be an "Acquiring Person."
         Notwithstanding the foregoing, if the Board of Directors of the
<PAGE>   5
         Company determines in good faith that a Person who would otherwise be
         an "Acquiring Person," as defined pursuant to the foregoing provisions
         of this paragraph, has become such inadvertently, and such Person
         divests as promptly as practicable (and in any event within ten
         business days after notification by the Company) a sufficient number
         of shares of capital stock so that such Person would no longer be an
         Acquiring Person, as defined pursuant to the foregoing provisions of
         this paragraph, then such Person shall not be deemed to be an
         "Acquiring Person" for any purposes of this Agreement.  The word
         "outstanding," when used with reference to a Person's Beneficial
         Ownership of shares of capital stock of the Company, shall mean the
         number of such shares then issued and outstanding together with the
         number of such shares not then issued and outstanding which such
         Person would be deemed to own beneficially hereunder.

                 (b)      "Affiliate" and "Associate" shall have the meanings
         ascribed to such terms in Rule 12b-2 of the General Rules and
         Regulations under the Securities Exchange Act of 1934, as amended (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 or equity
         interests:

                            (i)      that such Person or any of such Person's
                 Affiliates or Associates, directly or indirectly, has (A) the
                 right to acquire (whether such right is exercisable
                 immediately or only after the passage of time) pursuant to any
                 agreement, arrangement or understanding (whether or not in
                 writing) or upon the exercise of conversion rights, exchange
                 rights, rights (other than the Rights at any time before the
                 occurrence of a Triggering Event but thereafter including
                 Rights), warrants or options, or otherwise; provided, however,
                 that a Person shall not be deemed the "Beneficial Owner" of,
                 or to "beneficially own," 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) the
                 right to vote or dispose of or "beneficial ownership" (as
                 determined pursuant to Rule 13d-3 of the General Rules and
                 Regulations under the Exchange Act) of (including pursuant to
                 any agreement, arrangement or understanding, whether or not in
                 writing); provided, however, that a Person shall not be deemed
                 the "Beneficial Owner" of, or to "beneficially own," any
                 security under this clause (B) as a result of an agreement,
                 arrangement or understanding to vote such security if such
                 agreement, arrangement or understanding (1) 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 (2) does not result in ownership
                 required to be reported by such Person on Schedule 13D under
                 the Exchange Act (or any comparable or successor report); or





                                       2
<PAGE>   6
                      (ii)    that are beneficially owned, by any other Person
                 (or any Affiliate or Associate thereof) with which such Person
                 or any of such Person's Affiliates or Associates has any
                 agreement, arrangement, or understanding whether or not in
                 writing), for the purpose of acquiring, holding, voting (except
                 pursuant to a revocable proxy as described in the provi so to
                 Section 1(c)(i) (B)), or disposing of any securities or equity
                 interests;

         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 40 days after the 
         date of such acquisition.

                (d)      "Business Day" shall mean any day other than a
         Saturday, a Sunday, or a day on which banking institutions in the
         States of Texas or Illinois 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., Texas time, on such date; provided, however, that if 
         such date is not a Business Day it shall mean 5:00 p.m., Texas or
         Illinois time, on the next succeeding Business Day.

                (f)      "Common Stock" shall mean the Common Stock, $0.01 
         par value, of the Company, except that "common stock" when used with
         reference to any Person other than the Company shall mean the 
         class of capital stock of such Person with the greatest voting power,
         or the equity securities or other equity interests having power to 
         control or direct the management, of such Person.

                (g)      "Continuing Director" shall mean any member of the
         Board of Directors of the Company who (i) (A) is not an Acquiring
         Person or a Person who is at the time engaged in a tender or exchange
         offer that could result in that Person's becoming the Beneficial 
         Owner of 20% or more of the outstanding Common Stock, or an 
         Affiliate or an Associate of either of the foregoing, and (B) who 
         was a member of the Board of Directors of the Company before the 
         time the Acquiring Person became an Acquiring Person or the tender 
         or exchange offer began or (ii) (A) is not an Acquiring Person or a 
         Person who is at the time engaged in a tender or exchange offer that 
         could result in that Person's becoming the Beneficial Owner of 20%
         or more of the outstanding Common Stock, or an Affiliate or an
         Associate of either of the foregoing, and (B) was recommended to
         serve on the Board of Directors of the Company by a majority of 
         Continuing Directors.

                (h)      "Distribution Date" shall have the meaning given it
         in Section 3(a) hereof.

                (i)      "Expiration Date" shall have the meaning given it in
         Section 7 hereof.





                                       3
<PAGE>   7
                 (j)      "Person" shall mean any individual, firm,
         corporation, partnership, or other entity.

                 (k)      "Preferred Stock" shall mean the Series A Junior
         Participating Preferred Stock, $1.00 par value, of the Company having
         the designations, preferences, rights, qualifications, limitations,
         and restrictions set forth in Exhibit A hereto.

                 (l)      "Record Date" shall mean July 8, 1998.

                 (m)      "Right" shall mean the right to purchase one
         one-hundredth of a share of Series A Junior Participating Preferred
         Stock, par value $1.00, of the Company, or other securities or
         property, upon the terms and subject to the conditions hereinafter set
         forth.

                 (n)      "Right Certificates" shall mean certificates
         substantially in the form of Exhibit B hereto, evidencing the rights
         or any other form of certificate evidencing the Rights, which form is
         adopted pursuant to this Agreement.

                 (o)      "Stock Acquisition Date" shall mean the first date of
         public announcement (which, for purposes of this definition, shall
         include a report filed pursuant to Section 13(d) of the Exchange Act)
         by the Company or an Acquiring Person that an Acquiring Person has
         become such.

                 (p)      "Subsidiary" shall mean any corporation or other
         entity of which a majority of any class of equity securities or of any
         equity interests is beneficially owned by the Company or a Subsidiary
         of the Company, or that is otherwise controlled by the Company or a
         Subsidiary of the Company, and "subsidiary," with reference to any
         other Person, shall mean any corporation or other entity of which a
         majority of any class of equity securities or of any equity interests
         is beneficially owned by such other Person, or which is otherwise
         controlled by such other Person.

                 (q)      "Triggering Event" shall mean any event described in
         Section 11(a)(ii) or Section 13(a) hereof.

         Section 2.  Appointment of Rights Agent.  The Company hereby appoints
the Rights Agent to act as agent for the Company and the holders of the Rights
(who, in accordance with Section 3 hereof, shall before the Distribution Date
also be the holders of the Common Stock) in accordance with the terms and
conditions hereof, and the Rights Agent hereby accepts such appointment.  The
Company may from time to time appoint such co-Rights Agents as it may deem
necessary or desirable.





                                       4
<PAGE>   8
         Section 3.  Issue of Right Certificates.

                 (a)      Until the earlier of (i) the close of business on the
         fifteenth day (subject to extension by the Board of Directors as
         provided below) after the Stock Acquisition Date, or (ii) the close of
         business on the fifteenth day (subject to extension by the Board of
         Directors as provided below) after the commencement of, or first
         public announcement of the intent to commence, a tender or exchange
         offer by any Person (other than the Company, any Subsidiary, any
         employee benefit plan of the Company or of any Subsidiary, or any
         Person organized, appointed, or established by the Company or any
         Subsidiary for or pursuant to the terms of any such plan), if upon
         consummation thereof, such Person would be the Beneficial Owner of 20%
         or more of the shares of Common Stock then outstanding (the earlier of
         such dates, after any extensions, being herein referred to as the
         "Distribution Date"), (A) 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 (B) the
         Rights will be transferable only in connection with the transfer of
         the underlying shares of Common Stock (including a transfer to the
         Company).  The fifteen-day periods referred to in clauses (i) and (ii)
         of the preceding sentence may be extended by the Board of Directors,
         provided that no such extension may be made when a majority of the
         directors in office are not Continuing Directors, and any such
         extension shall expire immediately when a majority of the directors in
         office are not Continuing Directors.  As soon as practicable after the
         Distribution Date, the Rights Agent will send, at the expense of the
         Company, by first-class, 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 Right Certificates evidencing one Right for each
         share of Common Stock so held, subject to adjustment as provided
         herein.  As of and after the Distribution Date, the Rights will be
         evidenced solely by such Right Certificates.

                 (b)      As promptly as practicable following the Record Date,
         the Company will send a copy of a summary of the Rights 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
         Rights will be evidenced by such certificates for the Common Stock and
         the registered holders of the Common Stock shall also be the
         registered holders of the associated Rights.  Until the 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)      Rights shall be issued in respect of all shares of
         Common Stock issued on or after the Record Date but before the earlier
         of the Distribution Date or the Expiration Date.  Common Stock
         certificates issued on or after the Record Date but before the earlier
         of the





                                       5
<PAGE>   9
         Distribution Date or the Expiration Date upon the transfer or new
         issuance of 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
                 the Corporation and Harris Trust and Savings Bank, dated as of
                 June 24, 1998 (the "Rights Agreement"), the terms of which are
                 incorporated herein and a copy of which is on file at the
                 principal offices of the Corporation.  Under certain
                 circumstances, as set forth in the Rights Agreement, such
                 Rights will be evidenced by separate certificates and will no
                 longer be evidenced by this certificate.  Promptly after
                 receipt of a written request therefor, the Corporation will
                 mail or cause to be mailed to the holder of this certificate a
                 copy of the Rights Agreement without charge.  Under certain
                 circumstances, Rights issued to, or held by, Acquiring Persons
                 or Affiliates or Associates thereof (as such terms are defined
                 in the Rights Agreement) and any subsequent holder of such
                 Rights may become null and void.

                 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.

         Section 4.  Form of Right Certificates.

                 (a)      The Right Certificates (and the forms of election to
         purchase shares of Common Stock 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 marks of identification or designation
         and such legends, summaries, or endorsements printed thereon that the
         Company may deem appropriate and that 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 Right
         Certificates, whenever distributed, shall be dated as of the
         Distribution Date and on their face shall entitle the holders thereof
         to purchase the number of shares of Preferred Stock set forth therein
         at the Purchase Price (as such term is defined in Section 7), but the
         number of shares purchasable upon the exercise of each Right and the
         Purchase Price thereof shall be subject to adjustment as provided
         herein.





                                       6
<PAGE>   10
                 (b)      Any Right Certificate 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 such Associate or Affiliate) who becomes a transferee
         after the Acquiring Person becomes such, or (iii) a transferee of an
         Acquiring Person (or such Associate or Affiliate) who becomes a
         transferee before or at the same time the Acquiring Person becomes
         such and receives such Rights pursuant to either (A) a transfer
         (whether or not for consideration) from the Acquiring Person to
         holders of equity interest in such Acquiring Person or to any Person
         with whom the Acquiring Person has any continuing agreement,
         arrangement, or understanding regarding the transferred Rights or (B)
         a transfer that is part of a plan, arrangement, or understanding that
         has as a primary purpose or effect avoidance of Section 7(e) hereof,
         and any Right Certificate issued upon transfer, exchange, 
         replacement, or adjustment of any other Right Certificate referred 
         to in this sentence, shall contain (to the extent feasible) the 
         following legend:

                 The Rights represented by this Right 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 Right 
         Certificate and the Rights represented hereby may become void in the 
         circumstances specified in Section 7(e) of the Rights Agreement.

         Section 5.  Countersignature and Registration.

                 (a)      The Right 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 
         Right 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 has signed 
         any of the Right Certificates ceases to be such officer of the 
         Company before countersignature by the Rights Agent and issuance and
         delivery by the Company, such Right Certificates, nevertheless, may 
         be countersigned by the Rights Agent and issued and delivered by the
         Company with the same force and effect as though the person who 
         signed such Right Certificates had not ceased to be such officer of 
         the Company; and any Right Certificate may be signed on behalf of 
         the Company by any person who, at the actual date of the execution 
         of such Right Certificate, shall be a proper officer of the Company 
         to sign such Right Certificate, although at the date of the 
         execution of this Rights Agreement any such person was not such an
         officer.

                 (b)      Following the Distribution Date, the Rights Agent
         will keep or cause to be kept, at the office designated by the Rights
         Agent as the appropriate place for surrender of Right Certificates 
         upon exercise or transfer, books for registration and transfer of 
         the Right





                                       7
<PAGE>   11
         Certificates issued hereunder.  Such books shall show the names and
         addresses of the holders of the Right Certificates, the number of
         Rights evidenced on the face of each of the Right Certificates, and the
         date of each of the Right Certificates.

         Section 6.  Transfer, Split Up, Combination, and Exchange of Right
Certificates; Mutilated, Destroyed, Lost, or Stolen Right Certificates.

                 (a)      Subject to the provisions of Section 4(b), Section
         7(e), and Section 14 hereof, at any time after the close of business
         on the Distribution Date and until the close of business on the
         Expiration Date, any Right Certificate may be transferred, split up,
         combined, or exchanged for another Right Certificate or Certificates,
         entitling the registered holder to purchase a like number of shares of
         Preferred Stock (or, following a Triggering Event, other securities or
         property, as the case may be) as the Right 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 Right Certificate shall make such
         request in writing delivered to the Rights Agent, and shall surrender
         the Right Certificate to be transferred, split up, combined, or
         exchanged at the office of the Rights Agent designated for such
         purpose.  Neither the Rights Agent nor the Company shall be obligated
         to take any action whatsoever with respect to the transfer of any such
         surrendered Right Certificate until the registered holder shall have
         completed and signed the certificate contained in the form of
         assignment set forth on the reverse side of each such Right
         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 shall reasonably
         request.  Thereupon the Rights Agent shall, subject to Section 4(b)
         and Section 7(e) hereof, countersign and deliver to the Person
         entitled thereto a Right Certificate or Right Certificates, as the
         case may be, as so requested.  The Company may require payment 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 Right Certificates.

                 (b)      Upon receipt by the Company and the Rights Agent of
         evidence reasonably satisfactory to them of the loss, theft,
         destruction, or mutilation of a Right Certificate, and, in case of
         loss, theft, or destruction, of indemnity or security reasonably
         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 Right
         Certificate if mutilated, the Company will execute and deliver a new
         Right Certificate of like tenor (except for the issuance date thereof)
         to the Rights Agent for countersignature and delivery to the
         registered owner in lieu of the Right Certificate so lost, stolen,
         destroyed, or mutilated.





                                       8
<PAGE>   12
         Section 7.  Exercise of Rights; Purchase Price; Expiration Date of
Rights.

                 (a)      Subject to Section 7(e) hereof, the registered holder
         of any Right Certificate may exercise the Rights evidenced thereby
         (except as otherwise provided herein including 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 Right Certificate, with the
         form of election to purchase set forth on the reverse side thereof and
         the certificate contained therein duly executed, to the Rights Agent
         at the office of the Rights Agent designated for such purpose,
         together with payment of the Purchase Price with respect to each
         surrendered Right for the total number of shares (or other securities
         or property, as the case may be) as to which such surrendered Rights
         are exercisable, at or before the earlier of (i) the close of business
         on June 24, 2008 (the "Final Expiration Date"), or (ii) the time at
         which the Rights are redeemed as provided in Section 23 hereof (such
         earlier time being herein referred to as 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 $125, and shall be subject to
         adjustment from time to time as provided in Section 11 hereof and
         shall be payable in lawful money of the United States of America in
         accordance with paragraph (c) below.

                 (c)      Upon receipt of a Right Certificate representing
         exercisable Rights, with the form of election to purchase set forth on
         the reverse side thereof and the certificate contained therein duly
         executed, accompanied by payment, with respect to each Right so
         exercised (by certified bank check or bank draft payable to the order
         of the Rights Agent), of the Purchase Price for the shares of
         Preferred Stock (or other securities or property, as the case may be)
         to be purchased and an amount equal to any applicable transfer tax,
         the Rights Agent shall, subject to Section 20(k) hereof, 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 the Preferred Stock) certificates for the number of shares of
         Preferred Stock to be purchased and the Company hereby irrevocably
         authorizes its transfer agent to comply with all such requests or (B)
         requisition from the depositary agent depositary receipts representing
         the number of one one-hundredths of a share of Preferred Stock being
         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 hereby directs 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 of Preferred Stock in accordance with Section 14
         hereof, (iii) after receipt of such certificates for shares of
         Preferred Stock, cause the same to be delivered to or upon the order
         of the registered holder of such Right Certificate, registered in the
         name or names 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 Right Certificate.  All funds received by
         the Rights Agent pursuant to the exercise of Rights shall be held in
         trust for the benefit of the Company and paid over to the Company on
         demand.  If the Company is obligated to issue other securities of the
         Company, pay cash, or distribute





                                       9
<PAGE>   13
         other property pursuant to Section 11(a) hereof, the Company will make
         all arrangements necessary so that such other securities, cash, or
         other property is available for distribution by the Rights Agent, if
         and when appropriate.

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

                 (e)      Notwithstanding anything in this Agreement to the
         contrary, from and after the 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 such Associate or Affiliate) who becomes a transferee after
         the Acquiring Person becomes such, or (iii) a transferee of an
         Acquiring Person (or such Associate or Affiliate) who becomes a
         transferee before or at the same time the Acquiring Person becomes
         such and receives such Rights pursuant to either (A) a transfer
         (whether or not for consideration) from the Acquiring Person to
         holders of equity interests in such Acquiring Person or to any Person
         with whom the Acquiring Person has any continuing agreement,
         arrangement, or understanding regarding the transferred Rights or (B)
         a transfer that is part of a plan, arrangement, or understanding that
         has as a primary purpose or effect the avoidance of this Section 7(e),
         shall become null and void without any further action, and any holder
         of such Rights shall thereupon have no rights whatsoever with respect
         to such Rights, whether under any provision of this Agreement or
         otherwise.  The Company shall use all reasonable efforts to insure
         that the provisions of this Section 7(e) are complied with, but shall
         have no liability to any holder of Right Certificates or other Person
         as a result of its failure to make any determination 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 the registered holder shall have completed and signed the
         certificate contained in the form of election to purchase set forth on
         the reverse side of the Right Certificate surrendered for such
         exercise 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 shall reasonably
         request.

         Section 8.  Cancellation and Destruction of Right Certificates.  All
Right Certificates surrendered for the purpose of exercise, transfer, split up,
combination, or exchange shall, if surrendered to the Company or any of its
agents, be delivered to the Rights Agent for cancellation or in canceled form,
or, if surrendered to the Rights Agent, shall be canceled by it, and no Right
Certificates shall be issued in lieu thereof except as expressly permitted by
any of the provisions of





                                       10
<PAGE>   14
this Agreement.  The Company shall deliver to the Rights Agent for cancellation
and retirement, and the Rights Agent shall so cancel and retire, any other
Right Certificate purchased or acquired by the Company otherwise than upon the
exercise thereof.  The Rights Agent shall deliver all canceled Right
Certificates to the Company, or shall, at the written request of the Company,
destroy such canceled Right Certificates, and in such case shall deliver a
certificate of destruction thereof to the Company.

         Section 9.  Reservation and Availability of Preferred Stock.

                 (a)      The Company 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, other
         securities) or any authorized and issued shares of Preferred Stock
         (and, following the occurrence of a Triggering Event, other
         securities) held in its treasury, the number of shares of Preferred
         Stock (and, following the occurrence of a Triggering Event, other
         securities) that, except as provided in Section 11(a)(iii) hereof,
         will be sufficient to permit the exercise in full of all outstanding
         Rights.

                 (b)      If shares of Preferred Stock (and, following the
         occurrence of a Triggering Event, other securities issuable and
         deliverable upon the exercise of the Rights) are listed on any
         national securities exchange, the Company shall use its best efforts
         to cause, from and after the time the Rights become exercisable (but
         only to the extent that it is reasonably likely that the Rights will
         be exercised), all shares reserved for issuance upon the exercise of
         the Rights to be listed on such exchange upon official notice of
         issuance upon such exercise.

                 (c)      The Company shall use its best efforts to (i) file,
         as soon as practicable following the first occurrence of a Triggering
         Event, a registration statement under the Securities Act of 1933, as
         amended (the "Securities Act"), with respect to the Preferred Stock or
         other securities purchasable upon exercise of the Rights on an
         appropriate form, (ii) cause such registration statement to become
         effective as soon as practicable after such filing, and (iii) cause
         such registration statement to remain effective (with a prospectus at
         all times meeting the requirements of the Securities Act) until the
         Expiration Date.  The Company will also take such action as may be
         appropriate under the securities or "blue sky laws" of the various
         states.  The Company may temporarily suspend, for a period of time not
         to exceed ninety (90) days, the exercisability of the Rights in order
         to prepare and file such registration statement.  Upon any such
         suspension, the Company shall issue a public announcement stating that
         the exercisability of the Rights has been temporarily suspended.

                 (d)      The Company will take all such action as may be
         necessary to ensure that all shares of Preferred Stock (and, following
         the occurrence of a Triggering Event, other securities) delivered upon
         exercise of Rights shall, at the time of delivery of the certificates
         for such shares (subject to payment of the Purchase Price), be duly
         and validly authorized and issued and fully paid and nonassessable.





                                       11
<PAGE>   15
                 (e)      The Company will pay when due and payable any and all
         federal and state transfer taxes and charges payable in respect of the
         issuance or delivery of the Right Certificates and of any certificates
         for shares of Preferred Stock (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 payable in respect of any transfer or
         delivery of Right Certificates to a Person other than, or the issuance
         or delivery of the shares of Preferred Stock or depositary receipts
         (or other securities, as the case may be) to someone other than, the
         registered holder of the Right Certificates evidencing Rights
         surrendered for exercise or to issue or deliver any certificates for
         shares of Preferred Stock (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 Right Certificates 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 shares of Preferred Stock (or other securities, as the case
may be) is issued upon the exercise of Rights shall for all purposes be deemed
to have become the holder of record of the shares of Preferred Stock (or other
securities, as the case may be) represented thereby on, and such certificate
shall be dated, the date upon which the Right Certificate evidencing such
Rights was duly surrendered and payment of the Purchase Price (and all
applicable transfer taxes) was made; provided, however, that if the date of
such surrender and payment is a date upon which the Preferred Stock (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 on, and
such certificate shall be dated, the next succeeding Business Day on which the
Preferred Stock (or other securities, as the case may be) transfer books of the
Company are open.  Before the exercise of the Rights evidenced thereby, the
holder of a Right 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 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)      If the Company at any time after the date
                 of this Agreement (A) declares a dividend on the Preferred
                 Stock payable in shares of Preferred Stock, (B) subdivides the
                 outstanding Preferred Stock, (C) combines the outstanding
                 Preferred Stock into a smaller number of shares, or (D) issues
                 or authorizes the issuance of 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(e) hereof, the Purchase Price in effect at
                 the time of the record date for such dividend or of the
                 effective date of such





                                       12
<PAGE>   16
                 subdivision, combination, or reclassification, and the number
                 and kind of shares of Preferred 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 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 before such date and at a time when the Preferred
                 Stock (or other capital stock, as the case may be) transfer
                 books of the Company were open, he would have owned upon such
                 exercise and been entitled to receive by virtue of such
                 dividend, subdivision, combination, or reclassification.  If
                 an event occurs that 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 before, any adjustment required
                 pursuant to Section 11(a)(ii) hereof.

                            (ii)     If, at any time after the date of this
                 Agreement, any Person, alone or together with its Affiliates
                 or Associates, shall become an Acquiring Person, then 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
                 Purchase Price then current in accordance with the terms of
                 this Agreement, in lieu of the number of shares of Preferred
                 Stock for which a Right would otherwise be exercisable, a
                 number of shares of Common Stock of the Company equal to the
                 result obtained by (1) multiplying the Purchase Price then
                 current by the number of hundredths of a share of Preferred
                 Stock for which a Right was exercisable immediately before the
                 first occurrence of an event set forth in this Section
                 11(a)(ii), and dividing that product by (2) 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
                 (the "Adjustment Shares").

                          (iii)      If there are not sufficient authorized but
                 unissued and treasury shares of Common Stock to permit the
                 exercise in full of the Rights in accordance with the
                 foregoing subparagraph (ii), the Company shall take all such
                 action as may be necessary to authorize additional shares of
                 Common Stock for issuance upon exercise of the Rights;
                 provided, however, if the Company is unable to cause the
                 authorization of a sufficient number of additional shares of
                 Common Stock, then, if the Rights become so exercisable, the
                 Company, with respect to each Right and to the extent
                 necessary and permitted by applicable law and any agreements
                 or instruments in effect on the Stock Acquisition Date to
                 which it is a party, shall, upon the exercise of any such
                 Right, make adequate provision to: (A) pay an amount in cash
                 equal to the excess of (1) the product of (a) the number of
                 Adjustment Shares, multiplied by (b) the current market price
                 (determined pursuant to Section 11(d) hereof) per share of the
                 Common Stock on the date of the first occurrence of an event
                 set forth in Section 11(a)(ii) above (such product is herein
                 called the "Current Value"), over (2) the Purchase Price, in
                 lieu of issuing shares of Common Stock and requiring payment
                 therefor; (B) issue debt or equity securities (other than
                 Common





                                       13
<PAGE>   17
                 Stock) having a value equal to the Current Value, where the
                 value of such securities shall be determined by an investment
                 banking firm selected by the Board of Directors of the
                 Company, and requiring the payment of the Purchase Price
                 therefor; (C) issue a number of shares, or units of shares, of
                 preference stock equal to the number of Adjustment Shares
                 where the Board of Directors of the Company shall have deemed
                 such shares or units to have the same value as the Common
                 Stock (a "Common Stock Equivalent"), and requiring the payment
                 of the Purchase Price; or (D) deliver any combination of cash,
                 property, preference stock, Common Stock Equivalents, or other
                 securities having the requisite value as determined by the
                 Board of Directors and requiring the payment of all or any
                 requisite portion of the Purchase Price; provided further,
                 however, if the Company shall not have made adequate provision
                 to deliver value pursuant to clause (A), (B), (C), or (D)
                 above within sixty (60) days following the date of the first
                 occurrence of the event listed in Section 11(a)(ii), then the
                 Company shall be obligated to deliver cash in accordance with
                 clause (A) above.  To the extent that the Company determines
                 that some action need be taken pursuant to clause (A), (B),
                 (C), or (D) of the first proviso to the first sentence of this
                 Section 11(a)(iii), the Company may suspend the exercisability
                 of the Rights for a period of up to sixty (60) days (or ninety
                 (90) days if a registration statement pursuant to Section 9(c)
                 hereof is being filed and pursued) following the date on which
                 the event listed in Section 11(a)(ii) shall have occurred, in
                 order to decide the appropriate form of distribution to be
                 made pursuant to such first proviso 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.

                 (b)      If the Company fixes 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 securities convertible into Preferred Stock at a price per
         share of Preferred Stock (or having a conversion price per share, if a
         security convertible into 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 before 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 so to be offered (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 to be offered for subscription or purchase (or into
         which the convertible securities so to be offered are initially
         convertible).  If the 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 non-cash consideration shall be as determined in
         good faith by the Board





                                       14
<PAGE>   18
         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.  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 if such rights or warrants
         are not so issued, the Purchase Price shall be adjusted to be the
         Purchase Price that would then be in effect if such record date had
         not been fixed.

                 (c)      If the Company fixes 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 before 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 and shall be binding on 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.  Such adjustments shall be made successively
         whenever such a record date is fixed; and if such distribution is not
         so made, the Purchase Price shall be adjusted to be the Purchase Price
         that would have been in effect if such record date had not been fixed.

                 (d)        (i)      For the purpose of any computation
                 hereunder, other than in 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
                 before such date (or, if the Common Stock has been traded on
                 fewer than thirty (30) Trading Days, then the number of
                 Trading Days on which the Common Stock has been traded,) and
                 for the purpose of any computation in 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 following such date;
                 provided, however, that if the current market price per share
                 of the Common Stock is determined during a period following
                 the announcement by the issuer of such Common Stock of (i) a
                 dividend or distribution on such Common Stock payable in
                 shares of such Common Stock or securities convertible into
                 shares of such Common Stock (other than the Rights), or (ii)
                 any subdivision, combination,





                                       15
<PAGE>   19
                 or reclassification of such Common Stock, and before the
                 expiration of the requisite thirty (30) Trading Day or ten
                 (10) Trading Day period, as set forth above, the ex-dividend
                 date for such dividend or distribution, or the record date for
                 such subdivision, combination or reclassification occurs,
                 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, or, if no such sale takes place on such day, the
                 average of the closing bid and asked prices, regular way, in
                 either case as reported in the principal consolidated
                 transaction reporting system with respect to securities listed
                 or admitted to trading on the New York Stock Exchange or, if
                 the shares of Common Stock are not listed or admitted to
                 trading on the New York Stock Exchange, as reported in the
                 principal consolidated transaction reporting system with
                 respect to securities listed on the principal national
                 securities exchange on which the shares of Common Stock are
                 listed or admitted to trading or, if the shares of Common
                 Stock are not listed or admitted to trading on any national
                 securities exchange, the last quoted sale 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.

                           (ii)      For the purpose of any computation
                 hereunder, the "current market price" of the Preferred Stock
                 shall be determined in the same manner as set forth above for
                 Common Stock in Section 11(d)(i).  If the current market price
                 of the Preferred Stock cannot be determined in the manner
                 provided above, the "current market price" of the Preferred
                 Stock shall be conclusively deemed to be the current market
                 price of the Common Stock (appropriately adjusted to reflect
                 any stock split, stock dividend, or similar transaction
                 occurring after the date hereof), multiplied by one hundred.
                 If neither the Common Stock nor the Preferred Stock is
                 publicly held or so listed or traded, "current market price"
                 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.





                                       16
<PAGE>   20
                          (e)        Anything herein to the contrary
                 notwithstanding (except the last sentence of this Section
                 11(e)), 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 that 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, as
                 the case may be.  Notwithstanding the first sentence of this
                 Section 11(e), any adjustment required by this Section 11
                 shall be made not later than the earlier of (i) three (3)
                 years from the date of the transaction that requires such
                 adjustment, or (ii) the Expiration Date.

                          (f)        If as a result of an adjustment made
                 pursuant to Section 11(a) 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 shares of Preferred Stock
                 contained in this Section 11, 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 after any adjustment made to the Purchase Price
                 hereunder shall evidence the right to purchase, at the
                 adjusted Purchase Price, the number of shares 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 has 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
                 before the making of such adjustment shall thereafter evidence
                 the right to purchase, at the adjusted Purchase Price, that
                 number of shares of Preferred Stock (calculated to the nearest
                 ten-thousandth) obtained by (i) multiplying (A) the number of
                 shares covered by a Right immediately before this adjustment,
                 by (B) the Purchase Price in effect immediately before 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 substitution for any adjustment in the number of
                 shares 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
                 shares of Preferred Stock for which a Right was exercisable
                 immediately before such adjustment.  Each Right held of record
                 before such adjustment of the number of Rights shall become
                 that number of Rights (calculated to the nearest
                 ten-thousandth) obtained by dividing the Purchase Price in
                 effect immediately before adjustment of the Purchase Price by
                 the





                                       17
<PAGE>   21
                 Purchase Price in effect immediately after adjustment of the
                 Purchase Price.  The Company shall make a public announcement
                 of its election to adjust the number of Rights, indicating the
                 record date for the adjustment, and, if known at the time, the
                 amount of the adjustment to be made.  This record date may be
                 the date on which the Purchase Price is adjusted or any day
                 thereafter, but, if the Right Certificates have been issued,
                 shall be at least ten (10) days later than the date of the
                 public announcement.  If Right Certificates have been issued,
                 upon each adjustment of the number of Rights pursuant to this
                 Section 11(i), the Company shall, as promptly as practicable,
                 cause to be distributed to holders of record of Right
                 Certificates on such record date Right Certificates
                 evidencing, subject to Section 14 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 Right Certificates held by such
                 holders before the date of adjustment, and upon surrender
                 thereof, if required by the Company, new Right Certificates
                 evidencing all the Rights to which such holders shall be
                 entitled after such adjustment.  Right Certificates so to be
                 distributed shall be issued, executed and countersigned in the
                 manner provided for herein (and may bear, at the option of the
                 Company, the adjusted Purchase Price) and shall be registered
                 in the names of the holders of record of Right Certificates on
                 the record date specified in the public announcement.

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

                          (k)        Before taking any action that would cause
                 an adjustment reducing the Purchase Price below the par value
                 of the shares of Preferred Stock issuable upon exercise of the
                 Rights, the Company shall take any corporate action that may,
                 in the opinion of its counsel, be necessary in order that the
                 Company may validly and legally issue fully paid and
                 nonassessable shares 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 shares of Preferred Stock and other capital
                 stock or securities of the Company, if any, issuable upon such
                 exercise over and above the shares 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 before 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 of Preferred Stock and other
                 capital stock or securities upon the occurrence of the event
                 requiring such adjustment.





                                       18
<PAGE>   22
                          (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 the good faith judgment of the Board
                 of Directors of the Company is advisable in order that any (i)
                 consolidation or subdivision of the Preferred Stock, (ii)
                 issuance for cash of any shares of Preferred Stock at less
                 than the current market price, (iii) issuance for cash of
                 shares of Preferred Stock or securities that by their terms
                 are convertible into or exchangeable for shares of Preferred
                 Stock, (iv) stock dividends, 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)        If at any time after the Record Date and
                 before the Distribution Date, the Company (i) declares or pays
                 any dividend on the Common Stock payable in Common Stock or
                 (ii) effects a subdivision, combination, or consolidation of
                 the Common Stock (by reclassification or otherwise than by
                 payment of dividends in Common Stock) into a greater or lesser
                 number of shares of Common Stock, then in any such case (A)
                 the number of hundredths of a share of Preferred Stock
                 purchasable after such event upon proper exercise of each
                 Right shall be determined by multiplying the number of
                 hundredths of a share of Preferred Stock so purchasable
                 immediately before such event by a fraction, the numerator of
                 which is the number of shares of Common Stock outstanding
                 immediately before such event and the denominator of which is
                 the number of shares of Common Stock outstanding immediately
                 after such event, and (B) each share of Common Stock
                 outstanding immediately after such event shall have issued
                 with respect to it that number of Rights which each share of
                 Common Stock outstanding immediately before such event had
                 issued with respect to it.  The adjustments provided for in
                 this Section 11(n) shall be made successively whenever such a
                 dividend is declared or paid or such a subdivision,
                 combination or consolidation is effected.  If an event occurs
                 that would require an adjustment under Section 11(a)(ii) and
                 this Section 11(n), the adjustments provided for in this
                 Section 11(n) shall be in addition and prior to any adjustment
                 required pursuant to Section 11(a)(ii).

                          (o)        If 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 that would substantially diminish or
                 otherwise eliminate the benefits intended to be afforded by
                 the Rights, the Company shall not, at any time after the
                 Distribution Date, (i) consolidate with, (ii) merge with or
                 into, or (iii) sell or transfer (or permit any Subsidiary to
                 sell or transfer), in one or more transactions, assets or
                 earning power aggregating more than 50% of the assets or
                 earning power of the Company and its Subsidiaries (taken as a
                 whole) to, any other Person.

                          (p)        The Company shall not, after the
                 Distribution Date, except as permitted by Section 23 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 eliminate the
                 benefits intended to be afforded by the Rights.





                                       19
<PAGE>   23
         Section 12.  Certificate of Adjusted Purchase Price or Number of
Shares.  Whenever an adjustment is made as provided in Section 11 or Section 13
hereof, the Company shall (a) promptly prepare a certificate setting forth such
adjustment and a brief statement of the facts accounting for such adjustment,
(b) promptly file with the Rights Agent, and with each transfer agent for the
Preferred Stock, a copy of such certificate, and (c) mail a brief summary
thereof to each holder of a Right Certificate in accordance with Section 25
hereof.  The Rights Agent shall be fully protected in relying on any such
certificate and on any adjustment therein contained, and shall not be obligated
or responsible for calculating and adjustment.  The Rights Agent may rely on
such certificate and shall not be deemed to have knowledge of any adjustment
unless and until it has received such certificate.

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

                 (a)      If, following the Distribution Date, directly or
         indirectly, (i) the Company consolidates with, or merges with and
         into, any other Person, and the Company is not the continuing or
         surviving corporation of such consolidation or merger, (ii) any Person
         consolidates with, or merges with or into, the Company, and the
         Company shall be the continuing or surviving corporation of such
         consolidation or merger and, in connection with such consolidation or
         merger, all or part of the outstanding shares of Common Stock, shall
         be changed into or exchanged for stock or other securities of any
         other Person or cash or any other property, or (iii) the Company sells
         or otherwise transfers (or one or more of its Subsidiaries shall sell
         or otherwise transfer), in one or more transactions, assets or earning
         power aggregating more than 50% of the assets or earning power of the
         Company and its Subsidiaries (taken as a whole) to any Person or
         Persons (other than the Company or any Subsidiary), then, and in each
         such case, proper provision shall be made so that:  (A) 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 Purchase
         Price then current in accordance with the terms of this Agreement, the
         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 rights of first
         refusal, equal to the result obtained by (1) multiplying the Purchase
         Price then current by the number of hundredths of a share of Preferred
         Stock for which a Right was exercisable immediately before the
         consummation of such consolidation, merger, sale, or transfer (without
         taking into account any adjustment previously made pursuant to Section
         11(a)(ii) hereof) and dividing that product by (2) 50% of the current
         market price (determined pursuant to Section 11(d) hereof) per share
         of the common stock of such Principal Party on the date of
         consummation of such consolidation, merger, sale, or transfer; (B)
         such Principal Party shall thereafter be liable for, and shall assume,
         by virtue of such consolidation, merger, sale, or transfer, all of the
         obligations and duties of the Company pursuant to this Agreement; (C)
         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 an event set forth in this Section 13(a); and
         (D) such Principal Party shall take such steps (including, but not
         limited to, the reservation of a sufficient number of shares





                                       20
<PAGE>   24
         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.

                 (b)      "Principal Party" shall mean

                            (i)      in the case of any transaction described
                 in clause (i) or (ii) 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

                           (ii)      in the case of any transaction described
                 in clause (iii) 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-month period registered under Section 12 of the
         Exchange Act, and such Person is a direct or indirect subsidiary of
         another Person the common stock of which is and has been so
         registered, "Principal Party" shall refer to such other Person; and
         (2) in case such Person is a subsidiary, directly or indirectly, of
         more than one Person, the common stocks of two or more of which are
         and have been so registered, "Principal Party" shall refer to
         whichever of such Persons is the issuer of the common stock having the
         greatest aggregate market value.

                 (c)      The Company shall not consummate any such
         consolidation, merger, sale, or transfer unless the Company and such
         Principal Party 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 Securities Act, with respect to the Rights and the
                 securities purchasable upon exercise of the Rights on an
                 appropriate form, and will use its best efforts to cause such
                 registration statement to (A) become effective as soon as
                 practicable after such filing and (B) remain effective (with a
                 prospectus at all times meeting the requirements of the
                 Securities Act) until the Expiration Date; and





                                       21
<PAGE>   25
                           (ii)      will deliver to holders of the Rights
                 historical financial statements for the Principal Party and
                 each of its Affiliates that comply in all respects with the
                 requirements for registration on Form 10 under the Exchange
                 Act.

         The provisions of this Section 13 shall similarly apply to successive
         mergers or consolidations or sales or other transfers.  If one of the
         transactions described in Section 13(a) hereof occurs at any time
         after the occurrence of a transaction described in Section 11(a)(ii)
         hereof, the Rights that 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 or to distribute Right Certificates that evidence fractional
         Rights.  In lieu of such fractional Rights, there shall be paid to the
         registered holders of the Right Certificates with regard to which such
         fractional Rights would otherwise be issuable, an amount in cash equal
         to the same fraction of the current market value of a whole Right.
         For 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 before 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 integral multiples of a
         hundredth of a share of Preferred Stock) upon exercise of the Rights
         or to distribute certificates that evidence fractional shares of
         Preferred Stock (other than integral multiples of a hundredth of a
         share of Preferred Stock).  Fractions of shares of Preferred Stock in
         integral multiples of a hundredth of a share may, at the election of
         the Company, be evidenced by depositary receipts, pursuant to an
         appropriate agreement between the Company and a depositary selected by
         it, provided that such





                                       22
<PAGE>   26
         agreement shall provide that the holders of such depositary receipts
         shall have all of the rights, privileges, and preferences to which
         they are entitled as beneficial owners of the shares of Preferred
         Stock represented by such depositary receipts.  In lieu of fractional
         shares of Preferred Stock other than integral multiples of a hundredth
         of a share, the Company may pay to the registered holders of Right
         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 share of Preferred Stock.  Any holder of more than one
         Right Certificate may exercise and aggregate all or part of the Rights
         evidenced by two or more Right Certificates so as to obtain a whole
         number of shares of Preferred Stock and to avoid receiving cash in
         lieu of a fractional share of Preferred Stock to which such holder
         would otherwise be entitled upon exercise of the Rights evidenced by a
         single Right Certificate.  For purposes of this Section 14(b), the
         current market value of one share of Preferred Stock shall be the
         closing price of a share of Preferred Stock (as determined pursuant to
         Section 11(d) hereof) for the Trading Day immediately before the date
         of such exercise.

                 (c)      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 provided above).

         Section 15.  Rights of Action.  All rights of action in respect of
this Agreement are vested in the registered holders of the Right Certificates
(and, before the Distribution Date, the registered holders of the Common
Stock); and any registered holder of any Right Certificate (or, before the
Distribution Date, of the Common Stock), without the consent of the Rights
Agent or of the holder of any other Right Certificate (or, before the
Distribution Date, of the Common Stock), may, on 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 Right Certificate in the manner
provided in such Right Certificate and in this Agreement.  Without limiting the
foregoing or any remedies available to the holders of Rights, it is
specifically acknowledged that the holders of Rights would not have an adequate
remedy at law for any breach of this Agreement and shall be entitled to
specific performance of the obligations 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)      before the Distribution Date, the Rights will be
         transferable only in connection with the transfer of Common Stock;

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





                                       23
<PAGE>   27
                 (c)      the Company and the Rights Agent may deem and treat
         the person in whose name a Right Certificate (or, before 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
         Right 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.

         Section 17.  Right Certificate Holder Not Deemed a Stockholder.  No
holder, as such, of any Right Certificate shall be entitled to vote or receive
dividends or be deemed for any purpose the holder of the shares of Preferred
Stock or any other securities of the Company that may at any time be issuable
on the exercise of the Rights represented thereby, nor shall anything contained
herein or in any Right Certificate be construed to confer upon the holder of
any Right Certificate, as such, any of the rights of a stockholder of the
Company or any right to vote for the election of directors or upon any matter
submitted to stockholders at any meeting thereof, or to give or withhold
consent to any corporate action, or to receive notice of meetings or other
actions affecting stockholders (except as provided in Section 24 hereof), or to
receive dividends or subscription rights, or otherwise, until the Right or
Rights evidenced by such Right Certificate shall have been exercised in
accordance with the provisions hereof.

         Section 18.  Concerning the Rights Agent.

                 (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 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, or expense, incurred without negligence,
         bad faith, or willful misconduct on the part of the Rights Agent, for
         anything done or omitted by the Rights Agent in connection with the
         acceptance and administration of this Agreement, including the costs
         and expenses of defending against any claim of liability in the
         premises.  The indemnification provided for hereunder shall survive
         the expiration of the Rights, the termination of this Agreement and
         the resignation or removal of the Rights Agent.  The costs and
         expenses of enforcing this right of indemnification also shall be paid
         by the Company,

                 (b)      The Rights Agent may conclusively rely upon and shall
         be protected and shall incur no liability for or in respect of any
         action taken, suffered, or omitted by it in connection with its
         administration of this Agreement in reliance upon any Right
         Certificate or certificate for Preferred 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.





                                       24
<PAGE>   28
                 (c)      Notwithstanding anything in this Agreement to the 
         contrary, in no event shall the Rights Agent be liable for special, 
         indirect or consequential loss or damage of any kind whatsoever 
         (including but not limited to lost profits), even if the Rights Agent
         has been advised of the likelihood of such loss or damage and 
         regardless of the form of the action.

         Section 19.  Merger or Consolidation or Change of Name of Rights
Agent.

                 (a)      Any corporation into which the Rights Agent or any
         successor Rights Agent may be merged or with which it may be
         consolidated, or any corporation resulting from any merger or
         consolidation to which the Rights Agent or any successor Rights Agent
         shall be a party, or any corporation succeeding to the 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.  If at the time such
         successor Rights Agent succeeds to the agency created by this
         Agreement any of the Right Certificates shall have been countersigned
         but not delivered, any such successor Rights Agent may adopt the
         countersignature of a predecessor Rights Agent and deliver such Right
         Certificates so countersigned; and if at that time any of the Right
         Certificates have not been countersigned, any successor Rights Agent
         may countersign such Right Certificates either in the name of the
         predecessor or in the name of the successor Rights Agent; and in all
         such cases such Right Certificates shall have the full force provided
         in the Right Certificates and in this Agreement.

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

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

                 (a)      Before the Rights Agent acts or refrains from acting,
         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 for
         any action taken or omitted by it in good faith and in accordance with
         such opinion.





                                       25
<PAGE>   29
                 (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 before 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 a
         person believed by the Rights Agent to be 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 to the Rights Agent for any action taken or suffered in
         good faith by it under the provisions of this Agreement in reliance
         upon such certificate.

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

                 (d)      The Rights Agent shall not be liable for or by reason
         of any of the statements of fact or recitals contained in this
         Agreement or in the Right Certificates or be required to verify the
         same (except as to its countersignature on such Right 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 in respect of the validity of this Agreement or the
         execution and delivery hereof (except the due execution hereof by the
         Rights Agent), or in respect of the validity or execution of any Right
         Certificate (except its countersignature thereof); nor shall it be
         responsible for any breach by the Company of any covenant or condition
         contained in this Agreement or in any Right Certificate; nor shall it
         be responsible for any 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 Right Certificates after
         receipt of a certificate furnished pursuant to Section 12 describing
         such change or adjustment); nor shall it by any act hereunder be
         deemed to make any representation or warranty as to the authorization
         or reservation of any shares of Preferred Stock or other securities to
         be issued pursuant to this Agreement or any Right Certificate or as to
         whether any shares of Preferred Stock or other securities will, when
         so issued, be validly authorized and issued, fully paid and
         nonassessable.

                 (f)      The Company 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.





                                       26
<PAGE>   30
                 (g)      The Rights Agent is hereby authorized and directed to
         accept instructions with respect to the performance of its duties
         hereunder from a person believed by the Rights Agent to be 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 it shall not be liable
         for any action taken or suffered to be taken by it in good faith in
         accordance with instructions of any such person.  Any application by
         the Rights Agent for written instructions from the Company may, at the
         option of the Rights Agent, set forth in writing any action proposed
         to be taken or omitted by the Rights Agent under this Rights Agreement
         and the date on and/or after which such action shall be taken or such
         omission shall be effective.  The Rights Agent shall not be liable for
         any action taken by, or omission of, the Rights Agent in accordance
         with a proposal included in any such application on or after the date
         specified in such application (which date shall not be less than five
         Business Days after the date any officer of the Company actually
         receives such application, unless any such officer shall have
         consented in writing to an earlier date) unless, prior to taking any
         such action (or the effective date in the case of an omission), the
         Rights Agent shall have received written instructions in response to
         such application specifying the action to be taken or omitted.

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

                 (i)      The Rights Agent may execute and exercise any of the
         rights or powers hereby vested in it or perform any duty hereunder
         either itself or by or through its attorneys or agents, and the Rights
         Agent shall not be answerable or accountable for any act, default,
         neglect, or misconduct of any such attorneys or agents, or for any
         loss to the Company resulting from any such act, default, neglect or
         misconduct; provided, however, reasonable care was exercised 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 is reasonable ground for
         believing that repayment of such funds or adequate indemnification
         against such risk or liability is not reasonably assured to it.

                 (k)      If, with respect to any Right Certificate surrendered
         to the Rights Agent for exercise or transfer, the certificate
         contained in the form of assignment or the form of election to
         purchase set forth on the reverse thereof, as the case may be, has
         either not been





                                       27
<PAGE>   31
         completed or indicates an affirmative response to clause 1 or 2
         thereof, the Rights Agent shall not take any further action with
         respect to such requested exercise of transfer without first
         consulting with the Company.

                 (l)      The Rights Agent shall not be required to take notice
         or be deemed to have notice of any fact, event or determination
         (including, without limitation, any dates or events defined in this
         Agreement or the designation of any Person as an Acquiring Person,
         Affiliate or Associate) under this Agreement unless and until the
         Rights Agent shall be specifically notified in writing by the Company
         of such fact, event or determination.

         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 Preferred Stock, by registered or certified mail,
and, at the expense of the Company, to the holders of the Right 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 Preferred Stock, by registered or certified mail, and to the holders of
the Right Certificates by first-class mail.  If the Rights Agent resigns or is
removed or otherwise becomes incapable of acting, the Company shall appoint a
successor to the Rights Agent.  If the Company fails 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 any holder of a Right Certificate
(who shall, with such notice, submit his Right Certificate for inspection by
the Company), then the registered holder of any Right Certificate may apply to
any court of competent jurisdiction for the appointment of a new Rights Agent.
Any successor Rights Agent, whether appointed by the Company or by such a
court, shall be a corporation organized and doing business under the laws of
the United States or of any State, in good standing, that is authorized under
such laws to exercise corporate trust powers and is subject to supervision or
examination by federal or state authority and that has at the time of its
appointment as Rights Agent a combined capital and surplus of at least
$10,000,000.  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 Preferred Stock, and mail a notice thereof in writing to the
registered holders of the Right Certificates.  Failure to give any notice
provided for in this Section 21, however, or any defect therein, shall not
affect the legality or validity of the resignation or removal of the Rights
Agent or the appointment of the successor Rights Agent, as the case may be.

         Section 22.  Issuance of New Right Certificates.  Notwithstanding any
of the provisions of this Agreement or of the Rights to the contrary, the
Company may, at its option, issue new Right Certificates evidencing Rights in
such form as may be approved by its Board of Directors to reflect





                                       28
<PAGE>   32
any adjustment or change in the Purchase Price per share and the number, kind
or class of shares or other securities or property purchasable under the Right
Certificates made in accordance with the provisions of this Agreement.  In
addition, in connection with the issuance or sale of shares of Common Stock
following the Distribution Date and before the redemption or expiration of the
Rights, the Corporation may, 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 granted or awarded on or before the Distribution Date or upon the
exercise, conversion, or exchange of securities hereafter issued by the
Corporation or in any other case, if deemed necessary or appropriate by the
Board of Directors, issue Right Certificates representing the appropriate
number of Rights in connection with such issuance or sale, provided that (i) no
such Right Certificate shall be issued if, and to the extent that, the
Corporation shall be advised by counsel that such issuance would create a
significant risk of material adverse tax consequences to the Corporation 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 and Termination; Exchange.

                 (a)      The Board of Directors of the Company may (at any
         time when a majority of the directors then serving are Continuing
         Directors), at its option, at any time before 5:00 p.m., Dallas,
         Texas, time, on the earlier of (i) the close of business on the
         fifteenth day (subject to extension by the Board of Directors as
         provided below) following the Stock Acquisition Date, or (ii) the
         Final Expiration Date, redeem all but not less than all the then
         outstanding Rights at a redemption price of $0.01 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").  The fifteen-day period referred to in the preceding sentence
         may be extended by the Board of Directors, provided that no such
         extension may be made when a majority of the directors in office are
         not Continuing Directors, and any such extension shall expire
         immediately when a majority of the directors in office are not
         Continuing Directors.  If, following the occurrence of a Stock
         Acquisition Date and following the expiration of the Company's right
         of redemption set forth in the preceding sentence but before any
         Triggering Event, each of the following shall have occurred and remain
         in effect: (1) a Person who was an Acquiring Person shall have
         transferred or otherwise disposed of a number of shares of Common
         Stock in a transaction, or series of transactions, that did not result
         in the occurrence of a Triggering Event so that such Person is
         thereafter a Beneficial Owner of 5% or less of the outstanding shares
         of Common Stock, (2) such Person continues for a period of ninety (90)
         days to beneficially own 5% or less of the outstanding shares of
         Common Stock, (3) during such ninety-day period, there are no other
         Persons who are Acquiring Persons, and (4) the transfer or other
         disposition described in clause (1) above was other than pursuant to a
         transaction, or series of transactions that directly or indirectly
         involved the Company or any of its Subsidiaries; then the Company's
         right of redemption set forth in the preceding sentence shall be
         reinstated.  Notwithstanding anything contained in this Agreement to
         the





                                       29
<PAGE>   33
         contrary, the Rights shall not be exercisable pursuant to Section
         11(a)(ii) hereof before the expiration of the Company's right of
         redemption set forth in the first sentence of this Section 23(a).

                 (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 Rights then
         outstanding 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, before the Distribution Date, on the registry books
         of the Transfer Agent for the Common Stock.  Any notice that 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.

                 (c)      The Board of Directors may, at its option, at any
         time after the occurrence of a Triggering Event, exchange all or part
         of the then outstanding and exercisable Rights for shares of Common
         Stock at an exchange ratio of one share of Common Stock per Right,
         appropriately adjusted to reflect any stock split, stock dividend or
         similar transaction occurring after the date hereof (such exchange
         ratio being hereinafter referred to as the "Exchange Ratio").
         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 or any Subsidiary, or any Person organized, appointed
         or established by the Company or any Subsidiary for or pursuant to the
         terms of any such plan), together with all Affiliates and Associates
         of such Person, becomes the Beneficial Owner of 50% or more of the
         Common Stock then outstanding.

                 (d)      Immediately upon the effective time of the exchange
         of the Rights as specified by the action of the Board of Directors
         ordering the exchange of any Rights pursuant to Section 23(c) and
         without any further action and without any notice, the right to
         exercise such Rights shall terminate and the only right thereafter of
         a holder of such Rights shall be to receive that number of shares of
         Common Stock equal to the number of such Rights held by such holder
         multiplied by the Exchange Ratio.  The Company shall promptly give
         public notice of any such exchange; provided, however, that the
         failure to give, or any defect in, such notice shall not affect the
         validity of such exchange.  The Company promptly shall mail a notice
         of any such exchange to all of the holders of such Rights at their
         last addresses as they appear upon the registry books of the Rights
         Agent.





                                       30
<PAGE>   34
                 Any notice that 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
         shares of Common Stock for Rights will be effected and, in the event
         of any partial exchange, the number of Rights that will be exchanged.
         Any partial exchange shall be effected pro rata based on the number of
         Rights held by each holder of Rights.

                 (e)      In any exchange pursuant to Section 23(c), the
         Company, at its option, may substitute shares of Preferred Stock (or
         equivalent shares) for shares of Common Stock exchangeable for Rights,
         at the initial rate of one one-hundredth of a share of Preferred Stock
         (or equivalent shares) for each share of Common Stock, as
         appropriately adjusted to reflect adjustments in the voting rights of
         the Preferred Stock pursuant to the terms thereof, so that the
         fraction of a share of Preferred Stock delivered in lieu of each share
         of Common Stock shall have the same voting rights as one share of
         Common Stock.

                 In the event that there shall not be sufficient shares of
         Common Stock or shares of Preferred Stock issued but not outstanding
         or authorized but unissued to permit any exchange of Rights as
         contemplated in accordance with this Section 23, the Company shall
         take all such action as may be necessary to authorize additional
         shares of Common Stock or Preferred Stock for issuance upon exchange
         of the Rights.

                 (f)      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, the Company shall pay to the registered holders of
         the Right 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 market value of a whole share of
         Common Stock.  For the purposes of this Section 23(f), the current
         market value of a whole share of Common Stock shall be the "current
         market price" of a share of Common Stock (as determined pursuant to
         Section 11(d)(i) hereof) for the Trading Day immediately prior to the
         date of exchange pursuant to Section 23(c) hereof.

         Section 24.  Notice of Certain Events.

                 (a)      If the Company proposes, at any time after the
         Distribution Date, (i) to declare or 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
         quarterly 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, or to effect any sale
         or other transfer (or to permit one or more of its Subsidiaries to
         effect any sale or other transfer), in one or





                                       31
<PAGE>   35
         more transactions, of more than 50% of the assets or earning power of
         the Company and its Subsidiaries (taken as a whole) to, any other
         Person, or (v) to effect the liquidation, dissolution or winding up of
         the Company, or (vi) to declare or pay any dividend on the Common
         Stock payable in shares of Common Stock or to effect a subdivision,
         combination, or consolidation of the Common Stock (by reclassification
         or otherwise then by payment of dividends in Common Stock), then, in
         each such case, the Company shall give to each holder of a Right
         Certificate, to the extent feasible, in accordance with Section 25
         hereof, a notice of such proposed action, which shall specify the
         record date for the purposes of such stock dividend or 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 twenty (20) days before
         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 twenty (20) days before 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)      If the event set forth in Section 11(a)(ii) hereof
         occurs, then, in any such case, the Company shall as soon as
         practicable thereafter give to each holder of a Right Certificate, to
         the extent feasible, in accordance with Section 25 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.

         Section 25.  Notices.  Notices or demands authorized by this Agreement
to be given or made by the Rights Agent or by the holder of any Right
Certificate to or on the Company shall be sufficiently given or made if sent
first-class mail, postage prepaid, addressed (until another address is filed in
writing with the Rights Agent) as follows:

                          NCI Building Systems, Inc.
                          7301 Fairview
                          Houston, Texas 77041
                          Attn:  Secretary

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 Right
Certificate to or on the Rights Agent shall be sent by registered or certified
mail and shall be deemed given upon receipt, addressed (until another address
is filed in writing with the Company) as follows:

                          Harris Trust and Savings Bank
                          700 Louisiana, Suite 3350
                          Houston, Texas 77002
                          Attn:  Ray Rosenbaum





                                       32
<PAGE>   36
Notices or demands authorized by this Agreement to be given or made by the
Company or the Rights Agent to the holder of any Right Certificate shall be
sufficiently given or made if sent by first-class mail, postage prepaid,
addressed to such holder at the address of such holder as shown on the registry
books of the Company.

         Section 26.  Supplements and Amendments.  During any period in which
the Rights are redeemable, except for a supplement or amendment that would
change the Redemption Price, Final Expiration Date, Purchase Price, number of
shares of Preferred Stock for which a Right is then exercisable, or if the
rights are not then redeemable, reinstate a right of redemption, at any time
and from time to time, the Company may and the Rights Agent shall, if the
Company so directs, supplement or amend this Agreement without the approval of
any holders of Right Certificates in order (i) to change any provision of this
Agreement if the Rights are then redeemable, (ii) to cure any ambiguity, (iii)
to correct or supplement any provision contained herein that may be defective
or inconsistent with any other provisions herein, or (iv) to change or
supplement the provisions hereunder in any manner that the Company may deem
necessary or desirable and which does not adversely affect the interests of the
holders of Right Certificates (other than an Acquiring Person or an Affiliate
or Associate of an Acquiring Person).  Upon the delivery of a certificate from
an appropriate officer of the Company which states that the proposed supplement
or amendment is in compliance with the terms of this Section 26, the Rights
Agent shall execute such supplement or amendment.  Before the Distribution
Date, the interests of the holders of Rights shall be deemed coincident with
the interests of the holders of Common Stock.  Notwithstanding anything in this
Agreement to the contrary, no supplement or amendment that changes the rights
and duties of the Rights Agent under this Agreement will be effective against
the Rights Agent without the execution of such supplement or amendment by the
Rights Agent.

         Section 27.  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 successors and assigns hereunder.

         Section 28.  Determinations and Actions by the Board of Directors,
etc.  For all purposes of this Agreement, any calculation of the number of
shares of Preferred Stock or Common Stock outstanding at any particular time,
including for purposes of determining the particular percentage of such
outstanding shares of Preferred Stock or Common Stock of which any Person is
the Beneficial Owner, shall be made in accordance with the provisions 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 of the Company, or as may be necessary or
advisable in the administration of this Agreement, including 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 to redeem the Rights or
to amend the Agreement).  All such actions, calculations, interpretations, and
determinations (including, for purpose of clause (2) below, all omissions with
respect to the foregoing) that are done





                                       33
<PAGE>   37
or made by the Board in good faith, shall (1) be final, conclusive, and binding
on the Company, the Rights Agent, the holders of the Right Certificates and all
other parties, and (2) not subject the Board to any liability to the holders of
the Right Certificates.

         Section 29.  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 Right Certificates (and, before 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 Right Certificates (and, before the
Distribution Date, registered holders of the Common Stock).

         Section 30.  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 the Agreement would adversely affect the purpose or
effect of the 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 31.  Governing Law.  This Agreement shall be construed in
accordance with and governed by the laws of the State of Delaware applicable to
contracts made and performed entirely within that state, except as to the
rights and obligations of the Rights Agent, which shall be governed by and
construed in accordance with the laws of the State of Illinois.

         Section 32.  Counterparts.  This Agreement may be executed in any
number of counterparts, each of which so executed shall be deemed to be an
original, but all such counterparts shall together constitute but one and the
same instrument.

         Section 33.  Descriptive Headings.  Descriptive headings of the
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.


                [THE NEXT FOLLOWING PAGE IS THE SIGNATURE PAGE.]





                                       34
<PAGE>   38
         IN WITNESS WHEREOF, the parties to this Agreement have caused this
Agreement to be duly executed as of the date first above written.

                                                 NCI BUILDING SYSTEMS, INC.



                                                 By: /s/ Robert J. Medlock
                                                    --------------------------
                                                 Name: Robert J. Medlock
                                                      ------------------------
                                                 Title: V.P. and CFO 
                                                        ----------------------


                                                 HARRIS TRUST AND SAVINGS BANK,
                                                 as Rights Agent



                                                 By: /s/ Ray G. Rosenbaum
                                                    --------------------------
                                                 Name: Ray G. Rosenbaum
                                                      ------------------------
                                                 Title: Vice President
                                                        ----------------------




                                       35
<PAGE>   39
                                                                       EXHIBIT A


                           CERTIFICATE OF DESIGNATION
                                       OF
                 SERIES A JUNIOR PARTICIPATING PREFERRED STOCK
                                       OF
                           NCI BUILDING SYSTEMS, INC.

                        (Pursuant to Section 151 of the
                       Delaware General Corporation Law)

                        _______________________________

         NCI Building Systems, Inc., a corporation organized and existing under
the General Corporation Law of the State of Delaware (the "Corporation"),
hereby certifies that the following resolution was adopted by the Board of
Directors of the Corporation in accordance with Section 151 of the General
Corporation Law at a meeting duly called and held on June 24, 1998:

         RESOLVED, that, pursuant to the authority granted to and vested in the
         Board of Directors of this Corporation (the "Board of Directors" or
         the "Board") in accordance with the provisions of the Restated
         Certificate of Incorporation, the Board of Directors hereby creates a
         series of Preferred Stock, par value $1.00 per share (the "Preferred
         Stock"), of the Corporation and hereby states the designation and
         number of shares, and fixes the relative rights, preferences, and
         limitations thereof as follows:

         Series A Junior Participating Preferred Stock:

                 1.       Designation and Amount.  The shares of such series
         shall be designated as "Series A Junior Participating Preferred Stock"
         (the "Series A Preferred Stock") and the number of shares constituting
         the Series A Preferred Stock shall be 600,000.

                 Such number of shares may be increased or decreased by
         resolution of the Board of Directors; provided, that no decrease shall
         reduce the number of shares of Series A Preferred Stock to a number
         less than the number of shares then outstanding plus the number of
         shares reserved for issuance upon the exercise of outstanding options,
         rights, or warrants or upon the conversion of any outstanding
         securities issued by the Corporation convertible into Series A
         Preferred Stock.

                 2.       Dividends and Distributions.

                 (a)      Subject to the rights of the holders of any shares of
         any series of Preferred Stock (or any similar stock) ranking prior and
         superior to the Series A Preferred Stock with





                               Exhibit A - Page 1
<PAGE>   40
         respect to dividends, the holders of shares of Series A Preferred
         Stock, in preference to the holders of Common Stock, par value $0.01
         per share (the "Common Stock"), of the Corporation, and of any other
         junior stock, shall be entitled to receive, when, as and if declared
         by the Board of Directors out of funds legally available for the
         purpose, quarterly dividends payable in cash on the first day of
         February, May, August and November in each year (each such date being
         referred to herein as a "Quarterly Dividend Payment Date"), commencing
         on the first Quarterly Dividend Payment Date after the first issuance
         of a share or fraction of a share of Series A Preferred Stock, in an
         amount per share (rounded to the nearest cent) equal, subject to the
         provision for adjustment hereinafter set forth, to 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
         since the immediately preceding Quarterly Dividend Payment Date or,
         with respect to the first Quarterly Dividend Payment Date, since the
         first issuance of any share or fraction of a share of Series A
         Preferred Stock.  If the Corporation at any time declares or pays any
         dividend on the Common Stock payable in shares of Common Stock, or
         effects a subdivision or combination or consolidation of the
         outstanding shares of Common Stock (by reclassification or otherwise
         than by payment of a dividend in shares of Common Stock) into a
         greater or lesser number of shares of Common Stock, then in each such
         case the amount to which holders of shares of Series A Preferred Stock
         were entitled immediately before such event 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 before such event.

                 (b)      The Corporation shall declare a dividend or
         distribution on the Series A Preferred Stock as provided in Paragraph
         (a) of this Section immediately after it declares a dividend or
         distribution on the Common Stock (other than a dividend payable in
         shares of Common Stock).

                 (c)      Dividends shall begin to accrue and be cumulative on
         outstanding shares of Series A Preferred Stock from the Quarterly
         Dividend Payment Date next preceding the date of issue of such shares,
         unless the date of issue of such shares is before the record date for
         the first Quarterly Dividend Payment Date, in which case dividends on
         such shares shall begin to accrue from the date of issue of such
         shares, or unless the date of issue is a Quarterly Dividend Payment
         Date or is a date after the record date for the determination of
         holders of shares of Series A Preferred Stock entitled to receive a
         quarterly dividend and before such Quarterly Dividend Payment Date, in
         either of which events such dividends shall being to accrue and be
         cumulative from such Quarterly Dividend Payment Date.  Accrued but
         unpaid dividends shall not bear interest.  Dividends paid on the
         shares of Series A Preferred Stock in an amount less than the total
         amount of such dividends at the time accrued and payable on such
         shares shall be allocated pro rata on a share-by-share basis among all
         such shares at





                               Exhibit A - Page 2
<PAGE>   41
         the time outstanding.  The Board of Directors may fix a record date
         for the determination of holders of shares of Series A Preferred Stock
         entitled to receive payment of a dividend or distribution declared
         thereon, which record date shall be not more than 60 days before the
         date fixed for the payment thereof.

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

                 (a)      Subject to the provision for adjustment hereinafter
         set forth, each share of Series A Preferred Stock shall entitle the
         holder thereof to 100 votes on all matters submitted to a vote of the
         shareholders of the Corporation.  If the Corporation at any time
         declares or pays any dividend on the Common Stock payable in shares of
         Common Stock, or effects a subdivision or combination or consolidation
         of the outstanding shares of Common Stock (by reclassification or
         otherwise than by payment of a dividend in shares of Common Stock)
         into a greater or lesser number of shares of Common Stock, then in
         each such case the number of votes per share to which holders of
         shares of Series A Preferred Stock were entitled immediately before
         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 before such event.

                 (b)      Except as otherwise provided herein, in any other
         Certificate of Designation creating a series of Preferred Stock or any
         similar stock, or by law, the holders of shares of Series A Preferred
         Stock and the holders of shares of Common Stock and any other capital
         stock of the Corporation having general voting rights shall vote
         together as one class on all matters submitted to a vote of
         shareholders of the Corporation.

                 (c)      Except as set forth herein, holders of Series A
         Preferred Stock shall have no voting rights.

                 4.       Certain Restrictions.

                 (a)      Whenever dividends or distributions payable on the
         Series A 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
         Preferred Stock outstanding have been paid in full, the Corporation
         shall not:

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

                          (ii)    declare or pay dividends, or make any other
                 distributions, on any shares of stock ranking in parity
                 (either as to dividends or upon liquidation,





                               Exhibit A - Page 3
<PAGE>   42
                 dissolution or winding up) with the Series A Preferred Stock,
                 except dividends paid ratably on the Series A Preferred Stock
                 and all such parity stock on which dividends are payable or in
                 arrears in proportion to the total amounts to which the
                 holders of all such shares are then entitled;

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

                          (iv)    redeem or purchase or otherwise acquire for
                 consideration any shares of Series A Preferred Stock, or any
                 shares of stock ranking in parity with the Series A Preferred
                 Stock, except in accordance with a purchase offer made in
                 writing or by publication (as determined by the Board of
                 Directors) to all holders of such shares upon such terms as
                 the Board of Directors, after consideration of the annual
                 dividend rates and other relative rights and preferences of
                 the series and classes, shall determine in good faith will
                 result in fair and equitable treatment among the series or
                 classes.

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

                 5.       Reacquired Shares.  Any shares of Series A Preferred
         Stock purchased or otherwise acquired by the Corporation in any manner
         whatsoever shall be retired and canceled promptly after the
         acquisition thereof.  All such shares shall upon their cancellation
         become authorized but unissued shares of Preferred Stock and may be
         reissued as part of a new series of Preferred Stock subject to the
         conditions and restrictions on issuance set forth herein, in the
         Restated Certificate of Incorporation, in any other Certificate of
         Designations creating a series of Preferred Stock or similar stock, or
         as otherwise required by law.

                 6.       Liquidation, Dissolution or Winding Up.  Upon any
         liquidation, dissolution or winding up of the Corporation, no
         distribution shall be made (a) to the holders of shares of stock
         ranking junior (either as to dividends or upon liquidation,
         dissolution or winding up) to the Series A Preferred Stock unless,
         prior thereto, the holders of shares of Series A Preferred Stock shall
         have received $100 per share, plus an amount equal to accrued and
         unpaid dividends and distributions thereon, whether or not declared,
         to the date of such payment, provided that the holders of shares of
         Series A Preferred Stock shall be entitled to receive an aggregate
         amount per share, subject to the provision for adjustment hereinafter





                               Exhibit A - Page 4
<PAGE>   43
         set forth, equal to 100 times the aggregate amount to be distributed
         per share to holders of shares of Common Stock, or (b) to the holders
         of shares of stock ranking in parity (either as to dividends or upon
         liquidation, dissolution or winding up) with the Series A Preferred
         Stock, except distributions made ratably on the Series A Preferred
         Stock and all such parity stock in proportion to the total amounts to
         which the holders of all such shares are entitled upon such
         liquidation, dissolution or winding up.  If the Corporation at any
         time declares or pays any dividend on the Common Stock payable in
         shares of Common Stock, or effects a subdivision or combination or
         consolidation of the outstanding shares of Common Stock (by
         reclassification or otherwise than by payment of a dividend in shares
         of Common Stock) into a greater or lesser number of shares of Common
         Stock, then in each such case the aggregate amount to which holders of
         shares of Series A Preferred Stock were entitled immediately before
         such event under the provision in clause (a) of the preceding sentence
         shall be adjusted by multiplying such amount by a fraction, the
         numerator of which is the number of shares of Common Stock outstanding
         immediately after such event and the denominator of which is the
         number of shares of Common Stock that were outstanding immediately
         before such event.

                 7.       Consolidation, Merger, etc.  If the Corporation
         enters 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 or any other property,
         then in any such case each share of Series A Preferred Stock shall at
         the same time be similarly exchanged or changed into an amount per
         share, subject to the provision for adjustment hereinafter set forth,
         equal to 100 times the aggregate amount of stock, securities, cash 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.  If
         the Corporation at any time declares or pays any dividend on the
         Common Stock payable in shares of Common Stock, or effects a
         subdivision or combination or consolidation of the outstanding shares
         of Common Stock (by reclassification or otherwise than by payment of a
         dividend in shares of Common Stock) into a greater or lesser number of
         shares of Common Stock, then in each such case the amount set forth in
         the preceding sentence with respect to the exchange or change of
         shares of Series A Preferred Stock shall be adjusted by multiplying
         such amount by a fraction, the numerator of which is the number of
         shares of Common Stock outstanding immediately after such event and
         the denominator of which is the number of shares of Common Stock that
         were outstanding immediately before such event.

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

                 9.       Rank.  The Series A Preferred Stock shall rank, with
         respect to the payment of dividends and the distribution of assets,
         junior to all series and any other class of the Corporation's
         Preferred Stock.

                 10.      Amendment. The Restated Certificate of Incorporation
         of the Corporation shall not be amended in any manner that would
         materially alter or change the powers,





                               Exhibit A - Page 5
<PAGE>   44
         preferences or special rights of the Series A Preferred Stock so as to
         affect them adversely without the affirmative vote of the holders of
         at least a majority of the outstanding shares of Series A Preferred
         Stock, voting together as a single series.

         IN WITNESS WHEREOF, this Certificate of Designation is executed on
behalf of the Corporation by its Vice President and Chief Financial Officer and
attested by its Secretary this 26th day of June, 1998.



                                              NCI BUILDING SYSTEMS, INC.


                                              By: /s/ Robert J. Medlock
                                                  ----------------------------
                                              Name:   Robert J. Medlock
                                                   ---------------------------
                                              Title:  V.P. and CFO
                                                    --------------------------


[SEAL]

ATTEST:


/s/ Donnie R. Humphries
- ---------------------------------           
Name: Donnie R. Humphries        
     ----------------------------          
Title: Secretary                           
      ---------------------------




                               Exhibit A - Page 6
<PAGE>   45
                                                                       EXHIBIT B


                           Form of Right Certificate


Certificate No. R___________                                ____________ Rights


         NOT EXERCISABLE AFTER JUNE 24, 2008, OR EARLIER IF REDEMPTION OCCURS.
         THE RIGHTS ARE SUBJECT TO REDEMPTION AT $0.01 PER RIGHT ON THE TERMS
         SET FORTH IN THE RIGHTS AGREEMENT.  UNDER CERTAIN CIRCUMSTANCES
         (SPECIFIED IN SECTION 7(e) OF THE RIGHTS AGREEMENT), RIGHTS
         BENEFICIALLY OWNED BY ACQUIRING PERSONS OR ANY SUBSEQUENT HOLDER OF
         SUCH RIGHTS MAY BECOME NULL AND VOID.  [THE RIGHTS REPRESENTED BY THIS
         RIGHT CERTIFICATE ARE OR WERE BENEFICIALLY OWNED BY A PERSON WHO WAS
         OR BECAME AN ACQUIRING PERSON OR AN AFFILIATE OR AN ASSOCIATE OF AN
         ACQUIRING PERSON (AS SUCH TERMS ARE DEFINED IN THE RIGHTS AGREEMENT).
         ACCORDINGLY, THIS RIGHT CERTIFICATE AND THE RIGHTS REPRESENTED HEREBY
         MAY BECOME VOID IN THE CIRCUMSTANCES SPECIFIED IN SECTION 7(e) OF THE
         RIGHTS AGREEMENT.*

                               Right 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 June 24, 1998 (the "Rights Agreement"),
between NCI Building Systems, Inc., a Delaware corporation (the "Company"), and
Harris Trust and Savings Bank (the "Rights Agent"), to purchase from the
Company at any time after the Distribution Date (as such time is defined in the
Rights Agreement) and before 5:00 p.m., Texas time, on June 24, 2008, at the
offices of the Rights Agent, or at the office of its successor as Rights Agent,
one one-hundredth of a fully paid and nonassessable share of Series A Junior
Participating Preferred





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

     *The portion of the legend in brackets is inserted only if applicable.

                               Exhibit B - Page 1
<PAGE>   46
Stock, par value $1.00 per share (the "Preferred Shares"), of the Company, at a
purchase price of $______ per one one-hundredth of a Preferred Share (the
"Purchase Price"), upon presentation and surrender of this Right Certificate
with the Form of Election to Purchase duly executed.  The number of Rights
evidenced by this Right Certificate (and the number of hundredths of a
Preferred Share that may be purchased upon exercise hereof) set forth above,
are the number and the Purchase Price as of ________, 19__, based on the
Preferred Shares as constituted at such date.

         As provided in the Rights Agreement, the Purchase Price and the number
of hundredths of a Preferred Share that may be purchased upon the exercise of
the Rights evidenced by this Right Certificate are subject to modification and
adjustment upon the happening of certain events.

         This Right Certificate is subject to all of the terms, provisions, and
conditions of the Rights Agreement, which terms, provisions, and conditions are
hereby incorporated herein and made a part hereof and to which Rights Agreement
reference is hereby made for a full description of the rights, limitations of
rights, obligations, duties and immunities hereunder of the Rights Agent, the
Company and the holders of the Right Certificates.  Copies of the Rights
Agreement are on file at the principal executive offices of the Company and the
offices of the Rights Agent.

         This Right Certificate, with or without other Right Certificates, upon
surrender at the principal offices of the Rights Agent, may be exchanged for
another Right Certificate or Right Certificates of like tenor (except for the
issuance date thereof) evidencing Rights entitling the holder to purchase a
like aggregate number of Preferred Shares as the Rights evidenced by the Right
Certificate or Right Certificates surrendered entitled such holder to purchase.
If this Right Certificate is exercised in part, the holder shall be entitled to
receive upon surrender hereof another Right Certificate or Right Certificates
for the number of whole Rights not exercised.





                               Exhibit B - Page 2
<PAGE>   47
         Subject to the provisions of the Rights Agreement, the Rights
evidenced by this Certificate may, but are not required to, be redeemed by the
Company at a redemption price of $0.01 per Right.

         No fractional Preferred Shares will be issued upon the exercise of any
Right or Rights evidenced hereby (other than fractions that are integral
multiples of one one-hundredth of a Preferred Share, which may, at the election
of the Company, be evidenced by depositary receipts), but in lieu thereof a
cash payment will be made, as provided in the Rights Agreement.  No holder of
this Right Certificate shall be entitled to vote or receive dividends or be
deemed for any purpose the holder of the Preferred Shares or of any other
securities of the Company that 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 hereof, 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 Right Certificate have been exercised as
provided in the Rights Agreement.

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







                               Exhibit B - Page 3
<PAGE>   48

         WITNESS the facsimile signature of the proper officers of the Company
and its corporate seal.  Dated as of _____________, 19__.                     


ATTEST:                                NCI BUILDING SYSTEMS, INC.

                                       By:
- ---------------------------               -------------------------------------
Secretary                              Its:
                                           ------------------------------------




Countersigned:

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


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





                               Exhibit B - Page 4
<PAGE>   49
                               FORM OF ASSIGNMENT


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

         FOR VALUE RECEIVED _________________________ hereby sells, assigns,
         and transfers unto_________________________

                (Please print name and address of transferee)
         _____________________________________________________________________
         ___________________________ this Right Certificate, together with all
         right, title, and interest therein, and does hereby irrevocably 
         constitute and appoint _____________________________ attorney, to 
         transfer the within Right Certificate on the books of the within-named
         Company, with full power of substitution. 

         Dated:  _____________________, ______.


                                            ___________________________________
                                            Signature



Signature Guaranteed:

       Signatures must be guaranteed by a member firm of a registered national
securities exchange, a member of the National Association of Securities
Dealers, Inc., or a commercial bank or trust company having an office or
correspondence in the United States.

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

The undersigned hereby certifies that the Rights evidenced by this Right
Certificate are not beneficially owned by an Acquiring Person or an Affiliate
or Associate thereof (as defined in the Rights Agreement).



                                            ___________________________________
                                            Signature
<PAGE>   50
                          FORM OF ELECTION TO PURCHASE

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

To:            NCI BUILDING SYSTEMS, INC.

       The undersigned hereby irrevocably elects to exercise ______________
Rights represented by this Right Certificate to purchase the Preferred Shares
issuable upon the exercise of such Rights and requests that certificates for
such Preferred Shares be issued in the name of:


(Please insert social security or other identifying number.)

________________________________________________________________________________
                       (Please print name and address)


________________________________________________________________________________

       Dated:  _____________________, ______.



                                                 _______________________________
                                                 Signature



Signature Guaranteed:

       Signatures must be guaranteed by a member firm of a registered national
securities exchange, a member of the National Association of Securities
Dealers, Inc., or a commercial bank or trust company having an office or
correspondence in the United States.

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

The undersigned hereby certifies that the Rights evidenced by this Right
Certificate are not beneficially owned by an Acquiring Person or an Affiliate
or Associate thereof (as defined in the Rights Agreement).

                                                 ______________________________
                                                 Signature
<PAGE>   51
                                     NOTICE


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

       If the certification set forth above in the Forms of Assignment and
Election is not completed, the Company will deem the beneficial owner of the
Rights evidenced by this Right Certificate to be an Acquiring Person or an
Affiliate or Associate thereof (as defined in the Rights Agreement) and, in the
case of an Assignment, will affix a legend to that effect on any Right
Certificate issued in exchange for this Right Certificate.


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