Document:

EXHIBIT 10.2

                                                                  Execution Copy
================================================================================

                               SIXTH AMENDMENT TO

                     AMENDED AND RESTATED CREDIT AGREEMENT

                          Dated as of August 31, 2001

                                     Among

                  LABORATORY CORPORATION OF AMERICA HOLDINGS,
                                  as Borrower,

                            THE BANKS NAMED HEREIN,
                                 as Banks, and

                          CREDIT SUISSE FIRST BOSTON,
                            as Administrative Agent

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

<PAGE>

                         SIXTH AMENDMENT TO AMENDED AND
                           RESTATED CREDIT AGREEMENT

     SIXTH AMENDMENT TO AMENDED AND RESTATED CREDIT AGREEMENT, dated as of
August 31, 2001 (this "Amendment") among LABORATORY CORPORATION OF AMERICA
HOLDINGS, a Delaware corporation (the "Borrower"), the banks, financial
institutions and other institutional lenders (the "Banks") listed on the
signature pages hereof, and CREDIT SUISSE FIRST BOSTON, as administrative agent
(the "Administrative Agent") for the Lenders hereunder.

                             PRELIMINARY STATEMENTS

     The parties hereto (i) have entered into an Amended and Restated Credit
Agreement dated as of March 31, 1997, as amended as of September 30, 1997,
February 25, 1998, May 7, 1999, June 7, 2000 and March 14, 2001 (the "Credit
Agreement") providing for, among other things, the Lenders to lend to the
Borrower up to $1,143,750,000 on the terms and subject to the conditions set
forth therein and (ii) desire to amend the Credit Agreement in the manner set
forth herein. Each capitalized term used but not defined herein shall have the
meaning ascribed thereto in the Credit Agreement.

     NOW, THEREFORE, in consideration of the premises and the mutual covenants
and agreements contained herein, the parties hereto hereby agree as follows:

                                   ARTICLE I

                                   AMENDMENTS

     SECTION 1.01 Amendment to Covenant Prohibiting Issuance of Capital Stock.
Section 5.02(e) of the Credit Agreement is hereby amended by adding the
following new Section 5.02(e)(vii):

                  "(vii) the Borrower may issue and sell unsecured,
         subordinated zero coupon convertible bonds to the extent permitted by
         Section 5.02(j)(xiv) hereof, and may issue any capital stock issuable
         on any conversion, redemption or repurchase of such bonds required to
         be made by Borrower in accordance with the terms of such bonds."
<PAGE>

                                  ARTICLE II

                         REPRESENTATIONS AND WARRANTIES

     SECTION 2.01 Representations and Warranties of the Borrower. The Borrower
represents and warrants as follows:

                  (a) The Borrower is a corporation duly organized, validly
         existing and in good standing under the laws of the State of Delaware.

                  (b) The execution, delivery and performance by the Borrower
         of this Amendment are within its corporate powers, have been duly
         authorized by all necessary corporate action, and do not contravene
         the Borrower's charter or by-laws.

                  (c) No authorization or approval or other action by, and no
         notice to or filing with, any governmental authority or regulatory
         body is required for the due execution, delivery and performance by
         the Borrower of this Amendment.

                  (d) This Amendment has been duly executed and delivered by
         the Borrower. This Amendment is the legal, valid and binding
         obligation of the Borrower, enforceable against the Borrower, in
         accordance with its terms, subject to applicable bankruptcy,
         insolvency, reorganization, moratorium or similar laws affecting the
         enforceability of creditors' rights generally and by general
         principles of equity.

                  (e) The representations and warranties contained in Section
         4.01 of the Credit Agreement are correct in all material respects on
         and as of the date hereof, as though made on and as of the date
         hereof.

                  (f) No event has occurred and is continuing which constitutes
         a Default.

                                  ARTICLE III

                                 MISCELLANEOUS

     SECTION 3.01 Governing Law. This Amendment shall be governed by, and
construed in accordance with, the laws of the State of New York, without regard
to the conflicts of law principles thereof.

     SECTION 3.02 Execution in Counterparts. This Amendment may be executed in
any number of counterparts and by any combination of the parties hereto in
separate counterparts, each of which counterparts shall be an original and all
of which taken together shall constitute one and the same instrument. Delivery
of an executed

                                       2
<PAGE>

counterpart of a signature page to this Amendment by facsimile shall be
effective as delivery of a manually executed counterpart of this Amendment.

     SECTION 3.03 Effect on the Credit Agreement. Upon execution and delivery
of this Amendment, each reference in the Credit Agreement to "this Agreement",
"hereunder", "hereof", "herein", or words of like import shall mean and be a
reference to the Credit Agreement, as amended hereby and each reference to the
Credit Agreement in any Loan Document (as defined in the Credit Agreement)
shall mean and be a reference to the Credit Agreement, as amended hereby.
Except as expressly modified hereby, all of the terms and conditions of the
Credit Agreement shall remain unaltered and in full force and effect. This
Amendment is subject to the provisions of Section 8.01 of the Credit Agreement.

                                       3

<PAGE>

     Each of the undersigned has caused this Amendment to be executed by its
respective officer or officers thereunto duly authorized, as of the date first
written above.

BORROWER:                               LABORATORY CORPORATION OF AMERICA
                                           HOLDINGS

                                        By: /s/ Bradford T. Smith
                                           -------------------------------------
                                           Name:  Bradford T. Smith
                                           Title: Executive Vice President

ADMINISTRATIVE                          CREDIT SUISSE FIRST BOSTON,
AGENT:                                     as Administrative Agent

                                        By: /s/ Julia P. Kingsbury
                                           -------------------------------------
                                           Name:  Julia P. Kingsbury
                                           Title: Vice President

                                        By: /s/ Karl M. Studer
                                           -------------------------------------
                                           Name:  Karl M. Studer
                                           Title: Director

                                       4

<PAGE>

                                        CREDIT SUISSE FIRST BOSTON

                                        By: /s/ Karl Studer
                                           -------------------------------------
                                           Name:  Karl Studer
                                           Title: Director

                                        By: /s/ Thomas Haller
                                           -------------------------------------
                                           Name:  Thomas Haller
                                           Title: Associate

                        [SIXTH AMENDMENT SIGNATURE PAGE]

<PAGE>

                                        WESTDEUTSCHE LANDESBANK GIROZENTRALE
                                        New York Branch, as Lender

                                        By: /s/ Martin Clements
                                           -------------------------------------
                                           Name:  Martin Clements
                                           Title: Director

                                        By: /s/ Lars Kickstein
                                           -------------------------------------
                                           Name:  Lars Kickstein
                                           Title: Manager

                        [SIXTH AMENDMENT SIGNATURE PAGE]

<PAGE>

                                        CREDIT LYONNAIS
                                        New York Branch,
                                           as Lender

                                        By: /s/ Charles H. Heidsieck
                                           -------------------------------------
                                            Name:  Charles H. Heidsieck
                                            Title: Senior Vice President

                        [SIXTH AMENDMENT SIGNATURE PAGE]

<PAGE>

                                        THE CHASE MANHATTAN BANK,
                                           as Lender

                                        By: /s/ Peter M. Hayes
                                           -------------------------------------
                                           Name:  Peter M. Hayes
                                           Title: Vice President

                        [SIXTH AMENDMENT SIGNATURE PAGE]

<PAGE>

                                        FIRST UNION NATIONAL BANK,
                                           as Lender

                                        By: /s/ Douglas T. Davis
                                           -------------------------------------
                                           Name:  Douglas T. Davis
                                           Title: Senior Vice President

                        [SIXTH AMENDMENT SIGNATURE PAGE]

<PAGE>

                                        BANK OF AMERICA, N.A.,
                                           as Lender

                                        By: /s/ Philip S. Durand
                                           -------------------------------------
                                           Name:  Philip S. Durand
                                           Title: Principal

                        [SIXTH AMENDMENT SIGNATURE PAGE]

<PAGE>

                                        WACHOVIA BANK, N.A.,
                                           as Lender

                                        By: /s/ Brantley Echols
                                           -------------------------------------
                                           Name:  Brantley Echols
                                           Title: Senior Vice President

                        [SIXTH AMENDMENT SIGNATURE PAGE]

<PAGE>

                                        SOCIETE GENERALE,
                                           as Lender

                                        By: /s/ Eric Wormser
                                           -------------------------------------
                                           Name:  Eric Wormser
                                           Title: Managing Director

                        [SIXTH AMENDMENT SIGNATURE PAGE]

<PAGE>

                                        UBS AG
                                        Stamford Branch,
                                           as Lender

                                        By: /s/ Gregory H. Raue
                                           -------------------------------------
                                           Name:  Gregory H. Raue
                                           Title: Executive Director
                                                  Leverage Finance

                                        By: /s/ Wilfred V. Saint
                                           -------------------------------------
                                            Name:  Wilfred V. Saint
                                            Title: Associate Director
                                                   Banking Products Services, US

                        [SIXTH AMENDMENT SIGNATURE PAGE]

<PAGE>

                                        DEUTSCHE BANK AG
                                        New York Branch and/or Cayman Islands
                                           Branch, as Lender

                                        By: /s/ Stephanie Strohe
                                           -------------------------------------
                                           Name:  Stephanie Strohe
                                           Title: Vice President

                                        By: /s/ Joel Makowsky
                                           -------------------------------------
                                           Name:  Joel Makowsky
                                           Title: Vice President

                        [SIXTH AMENDMENT SIGNATURE PAGE]

<PAGE>

                                        BAYERISCHE LANDESBANK GIROZENTRALE
                                        Cayman Islands Branch,
                                           as Lender

                                        By: /s/ Hereward Drummond
                                           -------------------------------------
                                           Name:  Hereward Drummond
                                           Title: Senior Vice President

                                        By: /s/ Wolfgang Kottmann
                                           -------------------------------------
                                           Name:  Wolfgang Kottmann
                                           Title: Vice President, Manager

                        [SIXTH AMENDMENT SIGNATURE PAGE]

<PAGE>

                                        BNP PARIBAS,
                                           as Lender

                                        By: /s/ Jerome d'Humieres
                                           -------------------------------------
                                           Name:  Jerome d'Humieres
                                           Title: Vice President

                                        By: /s/ Nathalie Herrington
                                           -------------------------------------
                                           Name:  Nathalie Herrington
                                           Title: Vice President

                        [SIXTH AMENDMENT SIGNATURE PAGE]

<PAGE>

                                        SUMITOMO MITSUI BANKING CORPORATION,
                                           as Lender

                                        By: /s/ Eric Seeley
                                           -------------------------------------
                                           Name:  Eric Seeley
                                           Title: Vice President

                        [SIXTH AMENDMENT SIGNATURE PAGE]<PAGE>   1
                                                                     EXHIBIT 4.1

                           DUSA PHARMACEUTICALS, INC.

                                1996 OMNIBUS PLAN
                         (AS AMENDED FEBRUARY 28, 2001)

                               ARTICLE I - PURPOSE

      This Omnibus Plan (the "Plan") is intended to promote the growth and
general prosperity of DUSA Pharmaceuticals, Inc. (the "Company") and its
shareholders by offering incentives to its key directors, employees and
consultants of the Company who are primarily responsible for the growth of the
Company and to attract and retain qualified directors, employees and consultants
of the Company and thereby benefit its shareholders based on the growth of the
Company.

                            ARTICLE II - DEFINITIONS

      Unless the context indicates otherwise, the following terms, when used in
this Plan, shall have the meanings set forth in this Section:

      (a)   "Award" shall mean grants under this Plan that provide the
participants with the right to purchase Common Stock or that are valued by
reference to the Fair Market Value of the Common Stock.

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

      (c)   "Cause" shall mean deliberate, willful or gross misconduct.

      (d)   A "Change of Control" shall be deemed to have taken place upon (i)
the acquisition by a third person, including a "group" as defined in Section
13(d)(3) of the Securities Exchange Act of 1934, as amended, of shares of the
Company having 50% or more of the total number of votes that may be cast for the
election of Directors of the Company; (ii) shareholder approval of a transaction
for the acquisition of the Company, or substantially all of its assets by
another entity or for a merger, reorganization, consolidation or other business
combination to which the Company is a part; or (iii) the election during any
period of 24 months or less of 50% or more of the Directors of the Company where
such Directors were not in office immediately prior to such period provided,
however, that no "Change of Control" shall be deemed to have taken place if the
Directors of the Company in office on the date of adoption of the Plan, or their
successors in office nominated by such Directors, affirmatively approve a
resolution to such effect.

      (e)   "Code" shall mean the Internal Revenue Code of 1986 as it may be
amended from time to time.

      (f)   "Committee" shall mean, collectively, the Board, or any Committee of
two or more Non-Employee Directors, that may be designated by the Board to
administer the Plan.

      (g)   "Common Stock" shall mean all classes of stock, without par value,
including convertible preferred, stock purchase warrants and all common stock
equivalents.

      (h)   "Consultant" shall mean any person who (i) is engaged to perform
services for the Company or its Subsidiaries, other than as an Employee or
Director, or (ii) has agreed to become a consultant within the meaning of clause
(i).

      (i)   "Director" shall mean any member of the Board.
<PAGE>   2
      (j)   "Disability" shall mean inability to perform the services required
hereunder due to mental or physical disability which continues for either (i) a
total of 180 working days during any 12- month period or (ii) 150 consecutive
working days.

      (k)   "Employee" shall mean (i) any full-time employee of the Company or
its Subsidiaries (including Directors who are otherwise employed on a full-time
basis by the Company or its Subsidiaries), or (ii) any person who has agreed to
become an employee within the meaning of clause (i).

      (l)   "Exchange Act" shall mean the Securities Exchange Act of 1934 as it
may be amended from time to time.

      (m)   "Fair Market Value" of the Common Stock on a given date shall be
based upon, the last sales price or, if unavailable, the average of the closing
bid and asked prices per share of the Common Stock on such date (or, if there
was no trading or quotation in the Common Stock on such date, on the next
preceding date on which there was trading or quotation).

      (n)   "Grantee" shall mean a person granted an Award under the Plan.

      (o)   "ISO" shall mean an Option granted pursuant to the Plan to purchase
shares of the Common Stock and intended to qualify as an incentive stock option
under Section 422 of the Code, as now or hereafter constituted.

      (p)   "1933 Act" shall mean the Securities Act of 1933; as amended.

      (q)   "Non-Employee Director" shall mean a non-employee director as
defined in Exchange Act Rule 16b-3(b)(3)(i).

      (r)   "NQSO" shall mean an Option granted pursuant to the Plan to purchase
shares of the Common Stock that is not an ISO.

      (s)   "Options" shall refer collectively to NQSOs and ISOs issued under
and subject to the Plan. Each option is exercisable into one share of Common
Stock of the Company.

      (t)   "Parent" shall mean any parent corporation as defined in Section 424
of the Code.

      (u)   "Performance Awards" shall mean grants under the Plan, payable in
cash, Common Stock, other securities or other awards and shall confer on the
holder there of the right to receive payments, upon the achievement of such
performance goals during such performance periods as the Committee shall
establish.

      (v)   "Restricted Stock" shall mean Common Stock subject to restrictions
on transfer and/or such other restrictions on incidents of ownership as the
Committee may determine.

      (w)   "SAR" shall mean a right to receive, upon surrender of the right,
but without payment, an amount payable in cash.

      (x)   "Subsidiary" shall mean (i) any corporation with respect to which
the Company owns, directly or indirectly, 50% or more of the total combined
voting power of all classes of stock of such Company, or (ii) any entity which
the Committee reasonably expects to become a subsidiary within the meaning of
clause (i).

                          ARTICLE III - ADMINISTRATION

      The Plan shall be administered by the Committee. Subject to the provisions
of the Plan, the Committee shall have full discretion and the exclusive power
(i) to select the Employees, Consultants and Directors who will participate in
the Plan and to make Awards to such Employees, Consultants, and Directors, (ii)
to determine the time at which such
<PAGE>   3
Awards shall be granted and any terms and conditions with respect to such Awards
as shall not be inconsistent with the provisions of the Plan, and (iii) to
resolve all questions relating to the administration of the Plan. The
interpretation of and application by the Committee of any provision of the Plan
shall be final and conclusive. The Committee may in its discretion establish
such rules and guidelines relating to the Plan as it may deem desirable. No
member of the Board of Directors or the Committee shall be liable for any action
or determination made in good faith with respect to the Plan or any Awards
granted hereunder. The Committee may employ such legal counsel, consultants and
agents as it may deem desirable for the administration of the Plan and may rely
upon any opinion received from any such counsel or consultant and any
computation received from any such consultant or agent. The Committee shall keep
minutes of its actions under the Plan.

             ARTICLE IV - SHARES OF COMMON STOCK SUBJECT TO THE PLAN

      Subject to the provisions of Article XV, the maximum number of shares with
respect to which the Awards may be granted under the Plan shall not exceed
twenty percent (20%) of the number of shares of Common Stock outstanding or a
maximum of 2,753,328 shares. Any shares subject to an Award under the Plan,
which Award for any reason expires or is terminated unexercised as to such
shares, shall again be available for the grant of other Awards under the Plan
provided, however, that forfeited Common Stock or other securities shall not be
available for further Awards if the participant has realized any benefits of
ownership from such Common Stock. Shares delivered upon exercise of the Awards,
at the election of the Board of Directors of the Company, may be stock that is
authorized but previously unissued or stock reacquired by the Company or both.

                             ARTICLE V - ELIGIBILITY

      The individuals who shall be eligible to participate in the Plan shall be
Employees, Consultants and Directors of the Company. An Employee, Consultant or
Director who has been granted an Award in one year shall not necessarily be
entitled to be granted Awards in subsequent years.

        ARTICLE VI - GRANTS OF STOCK OPTIONS TO EMPLOYEES AND CONSULTANTS

      The Committee may grant Options, as follows, which may be designated as
(i) NQSOs or (ii) ISOs intended to qualify under Code Section 422:

      (a)   NONQUALIFIED STOCK OPTIONS. A NQSO is a right to purchase a
specified number of shares of Common Stock during such specified time as the
Committee may determine, not to exceed ten (10) years, at a price determined by
the Committee that, unless deemed otherwise by the Committee, is not less than
the Fair Market Value of the Common Stock on the date the option is granted.
NQSOs granted to Employees and Consultants shall vest at the rate of one quarter
of the total granted on each of the first, second, third and fourth
anniversaries of the day of the grant, subject to satisfaction of certain
conditions involving continuous periods of service or engagement.

            (i)   The purchase price of the Common Stock subject to the NQSO may
be paid in cash. At the discretion of the Committee, the purchase price may also
be paid by the tender of Common Stock or through a combination of Common Stock
and cash or through such other means as the Committee determines are consistent
with the Plan's purpose and applicable law. No fractional shares of Common Stock
will be issued or accepted.

            (ii)  Without limiting the foregoing, to the extent permitted by law
(including relevant state law), (A) the Committee may agree to accept, as full
or partial payment of the purchase price of Common Stock issued upon the
exercise of the NQSO, a promissory note of the person exercising the NQSO
evidencing the person's obligation to make future cash payments to the Company,
which promissory note shall be payable as determined by the Company (but in no
event later than five (5) years after the date thereof), shall be secured by a
pledge of the shares of Common Stock purchased and shall bear interest at a rate
established by the Committee and (B) the Committee may also permit the person
exercising the NQSO, either on a selective or aggregate basis, to simultaneously
exercise the NQSO and sell
<PAGE>   4
the shares of Common Stock acquired, pursuant to a brokerage or similar
arrangement approved in advance by the Committee, and use the proceeds from sale
as payment of the purchase price of such Common Stock.

      (b)   INCENTIVE STOCK OPTIONS. An ISO is an Award in the form of an Option
to purchase Common Stock that complies with the requirements of Code Section 422
or any successor section.

            (i)   The aggregate Fair Market Value (determined at the time of the
grant of the Award) of the shares of Common Stock subject to ISOs which are
exercisable by one person for the first time during a particular calendar year
shall not exceed $100,000. To the extent that ISOs granted to an employee exceed
the limitation set forth in the preceding sentence, ISOs granted last shall be
treated as NQSOs.

            (ii)  No ISO may be granted under this Plan on or after the tenth
anniversary of the date this Plan is adopted or the date this Plan is approved
by shareholders, whichever is earlier.

            (iii) No ISO may be exercisable more than:

                  (A) in the case of an Employee who is not a Ten Percent
Shareholder, within the meaning of Code Section 422, on the date the ISO is
granted; ten (10) years after the date the ISO is granted; and

                  (B) in the case of an Employee who is a Ten Percent
Shareholder, within the meaning of Code Section 422, on the date the ISO is
granted, five (5) years after the date the ISO is granted.

            (iv)  The exercise price of any ISO shall be determined by the
Committee and shall be no less than:

                  (A) in the case of an Employee who is not a Ten Percent
Shareholder, on the date the ISO is granted, the Fair Market Value of the Common
Stock subject to the ISO on such date; and

                  (B) in the case of an Employee who is a Ten Percent
Shareholder, on the date the ISO is granted, not less than 110 percent of the
Fair Market Value of the Common Stock subject to the ISO on such date.

            (v)   The Committee may provide that the option price under an ISO
may be paid by one or more of the methods available for paying the option price
of an NQSO.

            (vi)  ISOs shall vest at the rate of one quarter of the total
granted on each of the first, second, third and fourth anniversaries of the day
of the grant, subject to satisfaction of certain conditions involving continuous
periods of service or engagement.

 ARTICLE VII - GRANTS OF STOCK APPRECIATION RIGHTS TO EMPLOYEES AND CONSULTANTS

      An SAR is a right to receive, upon surrender of the right, but without
payment, an amount payable in cash.

      (i)   The amount payable with respect to each SAR shall be equal in value
to the applicable percentage of the excess, if any, of the Fair Market Value of
a share of Common Stock on the exercise date over the exercise price of the SAR.
The exercise price of the SAR shall be determined by the Committee and shall not
be less than the Fair Market Value of a share of Common Stock on the date the
SAR is granted.

      (ii)  In the case of an SAR granted in tandem with an ISO to an Employee
or Consultant who is a Ten Percent Shareholder on the date of such grant, the
amount payable with respect to each SAR shall be equal in value to the
applicable percentage of the excess, if any, of the Fair Market Value of a share
of Common Stock on the exercise date over the exercise price of the SAR, which
exercise price shall not be less than 110% of the Fair Market Value of a share
of Common Stock on the date the SAR is granted.
<PAGE>   5
      (iii) The applicable percentage and exercise price shall be established by
the Committee at the time the SAR is granted.

      (iv)  SARs shall vest at the rate of one quarter of the total granted on
each of the first, second, third and fourth anniversaries of the day of the
grant, subject to satisfaction of certain conditions involving continuous
periods of service or engagement.

     ARTICLE VIII - GRANTS OF RESTRICTED STOCK TO EMPLOYEES AND CONSULTANTS

      Restricted Stock is Common Stock of the Company that is issued to a
participant at a price determined by the Committee, which price may be zero, and
is subject to restrictions on transfer and/or such other restrictions on
incidents of ownership as the Committee may determine.

     ARTICLE IX - GRANTS OF PERFORMANCE AWARDS TO EMPLOYEES AND CONSULTANTS

      A Performance Award granted under the Plan (i) may be denominated or
payable in cash, Common Stock (including without limitation, Restricted Stock),
other securities or other Awards and (ii) shall confer on the holder thereof the
right to receive payments, in whole or in part, upon the achievement of such
performance goals during such performance periods as the Committee shall
establish. Subject to the terms of the Plan and any applicable Award agreement,
the performance goals to be achieved during any performance period, the length
of any performance period, the amount of any Performance Award granted and the
amount of any payment or transfer to be made pursuant to any Performance Award
shall be determined by the Committee.

            ARTICLE X - GRANTS OF OTHER STOCK-BASED INCENTIVE AWARDS
                          TO EMPLOYEES AND CONSULTANTS

      The Committee may from time to time grant Awards under this Plan that
provide the participant with the right to purchase Common Stock or that are
valued by reference to the Fair Market Value of the Common Stock (including, but
not limited to, phantom securities or dividend equivalents). Such Awards shall
be in a form determined by the Committee (and may include terms contingent upon
a change of control of the Company), provided that such Awards shall not be
inconsistent with the terms and purposes of the Plan. The Committee will
determine the price of any Award and may accept any lawful consideration.

                ARTICLE XI - GRANTS OF STOCK OPTIONS TO DIRECTORS

      (a)   Directors of the Company shall be eligible to receive NQSOs under
the Plan. Each individual who agrees to become a Director shall receive, on June
30th of the first year of such service and without the exercise of the
discretion of any person, a NQSO under the Plan relating to the purchase of
15,000 shares of Common Stock at an exercise price equal to the Fair Market
Value. Thereafter, on June 30th of each year, each individual who is a
continuing Director shall receive, without the exercise of the discretion of any
person, a NQSO under the Plan relating to the purchase of 10,000 shares of
Common Stock.

            (i)   Notwithstanding the preceding, all continuing directors on
June 30, 2001, shall receive, for that year only, a NQSO under the Plan relating
to the purchase of 5,000 shares of Common Stock.

      (b)   The exercise price of each share of Common Stock subject to a NQSO
granted to a Director shall equal the Fair Market Value of a share of Common
Stock on the date such NQSO is granted. The option price of a NQSO granted to a
Director may be paid in accordance with Article VI (a) (i) and (ii) of the Plan.

      (c)   Each automatic NQSO granted to a Director shall vest in full on the
date of the grant. The NQSOs to directors shall have a term not to exceed ten
(10) years from the date of grant, or, if later, the date the Grantee
<PAGE>   6
becomes a Director. Notwithstanding the exercise period of any NQSO granted to a
Director, all such NQSOs shall immediately become exercisable upon (i) the death
of a Director while serving as such, or (ii) a Change of Control.

                        ARTICLE XII - EXERCISE OF OPTIONS

      Options granted under the Plan may be exercised by a Grantee only while
the Employee, Consultant or Director is and, continuously since the date the
Option was granted, has been an Employee, Consultant or Director of the Company
or one of its subsidiaries, except that:

      (i)   if the Grantee's termination of employment is other than for Cause,
any Options held by the Grantee may be exercised, to the extent then
exercisable, for a period of three months after the date of such termination of
employment;

      (ii)  if such termination of employment is by reason of retirement or
disability, any Options held by the Grantee at the time of death or disability
will be exercisable for a period of 12 months after the date of such termination
of employment;

      (iii) in the event of death after termination of employment pursuant to
(i) or (ii) above, the person or persons to whom the Grantee's rights are
transferred by will or the laws of descent and distribution shall have a period
of three years from the date of termination of the Grantee's employment to
exercise any Options which the Grantee could have exercised during such period;
and

      (iv)  in the event of the death of an Grantee while employed, any Options
then held by the Grantee shall become fully and immediately exercisable and may
be exercised by the person or persons to whom the Grantee's rights are
transferred by will or the laws of descent and distribution for a period of
three years after the Grantee's death. In no event, however, shall any Option be
exercisable after the date specified in Article VI, as applicable.

      An Option granted hereunder shall be exercisable, in whole or in part,
only by written notice delivered in person or by mail to the Secretary of the
Company at its principal office, specifying the number of shares of Common Stock
to be purchased and accompanied by payment thereof and otherwise in accordance
with the option agreement pursuant to which the Option was granted.

      In the event of a Change of Control affecting the Company, then,
notwithstanding any provision of the Plan or of any provisions of any Award
agreements entered into between the Company and any participant to the contrary,
all Awards that have not expired and which are then held by any participant (or
the person or persons to whom any deceased participant's rights have been
transferred) shall, as of such Change of Control, become fully and immediately
vested and exercisable and may be exercised for the remaining term of such
Awards.

                         ARTICLE XIII - AWARD AGREEMENTS

      Each Award granted under the Plan shall be evidenced by an Award agreement
between the Grantee and the Company, setting forth the number of shares of
Common Stock, SARs, or units subject to the Award and such other terms and
conditions applicable to the Award not inconsistent with the Plan as the
Committee may deem appropriate.

                          ARTICLE XIV - TAX WITHHOLDING

      The Committee may establish such rules and procedures as it considers
desirable in order to satisfy any obligation of the Company or any subsidiary to
withhold federal income taxes or other taxes with respect to any Award made
under the Plan. Such rules and procedures may provide (i) in the case of Awards
paid in shares of Common Stock, that the person receiving the Award may satisfy
the withholding obligation by instructing the Company to withhold shares of
Common Stock otherwise issuable upon exercise of such Award in order to satisfy
such withholding obligation
<PAGE>   7
and (ii) in the case of an Award paid in cash, that the withholding obligation
shall be satisfied by withholding the applicable amount and paying the net
amount in cash to the participant.

                    ARTICLE XV - DILUTION OR OTHER ADJUSTMENT

      If the Company is a party to any merger or consolidation, or undergoes any
separation, reorganization or liquidation, the Board of Directors of the Company
shall have the power to make arrangements, which shall be binding upon the
holders of unexpired Awards, for the substitution of new Awards for, or the
assumption by another corporation of, any unexpired Awards then outstanding
hereunder. In the case of any ISO, such action shall be taken only in the manner
and to the extent permitted by Sections 422 and 424 of the Code. In addition, in
the event of a reclassification, stock split, combination of shares, separation
(including a spin-off), dividend on shares of the Common Stock payable in stock,
or other similar change in capitalization or in the corporate structure of
shares of the Common Stock of the Company, the Committee shall conclusively
determine the appropriate adjustment in the option prices of outstanding
Options, in the number and kind of shares or other securities as to which
outstanding Awards shall be exercisable, and in the aggregate number of shares
with respect to which Awards may be granted. In the case of any ISO, any such
adjustment in the shares or other securities subject to the ISO (including any
adjustment in the Option price) shall be made in such manner as not to
constitute a modification as defined by Section 424(h)(3) of the Code and only
to the extent permitted by Sections 422 and 424 of the Code.

                           ARTICLE XVI - ASSIGNABILITY

      No Award granted under this Plan shall be sold, pledged, assigned or
transferred other than by will or the laws of descent and distribution, and
Awards shall be exercisable during the Grantee's lifetime only by the Grantee.

                     ARTICLE XVII - AMENDMENT OR TERMINATION

      The Board of Directors of the Company may at any time amend, suspend or
terminate the Plan subject to the regulatory requirements of the United States
Securities and Exchange Commission and the National Association of Securities
Dealers or other applicable federal or state regulatory authority, provided,
however, that no change in any Awards previously granted may be made without the
consent of the holder thereof.

                       ARTICLE XVIII - GENERAL PROVISIONS

      (a)   Common Stock acquired pursuant to the exercise of an Option under
the Plan shall be subject to applicable transfer restrictions under applicable
Canadian or United States federal securities laws, under the requirements of any
national securities exchange or market upon which such Common Stock are then
listed and/or traded, and under any blue sky or state securities laws applicable
to such Common Stock. If the instrument evidencing the Option so provides,
Common Stock issued on exercise of an Option granted under the Plan may upon
issuance be subject to additional restrictions.

      (b)   At the discretion of the Board of Directors, the Options and the
shares of Common Stock received upon exercise of an Option shall be registered
with the United States Securities and Exchange Commission and any applicable
state securities law commission. In the absence of such registration, both the
Options and the shares of Common Stock underlying the Options: 1) will be issued
only pursuant to an exemption from registration; 2) cannot be sold, pledged,
traded or otherwise disposed of in the absence of an effective registration
statement or an opinion of counsel satisfactory to the Company that such
registration is not required; 3) will bear an appropriate restrictive legend to
that effect. Individuals receiving Options may be required to sign an investment
letter satisfactory to the Board of Directors at the time the Options are
exercised, and may be required to comply with any other requirements for an
exemption under the Securities Act of 1933 and any applicable state securities
law exemption.
<PAGE>   8
      (c)   The proceeds received by the Company from the sale of Common Stock,
pursuant to the exercise of Options granted under the Plan, shall be added to
the Company's general funds and used for general corporate purposes.

      (d)   No Awards may be exercised by the holder thereof if such exercise,
and the receipt of cash or stock thereunder, would be, in the opinion of counsel
selected by the Company, contrary to law or the regulations of any duly
constituted authority having jurisdiction over the Plan.

      (e)   No Award recipient shall have any rights as a shareholder with
respect to any shares subject to Awards granted to him or her under the Plan
prior to the date as of which he or she is actually recorded as the holder of
such shares upon the stock records of the Company.

      (f)   Nothing contained in the Plan or in Awards granted thereunder shall
confer upon any Employee, Consultant or Director any right to continue in the
employ of the Company or any of its subsidiaries or interfere in any way with
the right of the Company or any of its subsidiaries to terminate his or her
employment at any time.

                          ARTICLE XIX - EFFECTIVE DATE

      The Plan shall become effective on the date of its adoption by the Board
of Directors of the Company subject to approval of the Plan by the holders of a
majority of the outstanding voting shares of the Company within 12 months after
the date of the Plan's adoption by said Board of Directors. In the event of the
failure to obtain such shareholder approval, the Plan shall be null and void and
the Company shall have no liability thereunder. No Award granted under the Plan
shall be exercisable until such shareholder approval has been obtained.

                            ARTICLE XX - TERMINATION

      No Award may be granted under the Plan on or after the date which is ten
years following the effective date specified in Article XIX, but Awards
previously granted may be exercised in accordance with their terms.

Adopted June 6, 1996
As amended June 5, 1997, June 11, 1998
and February 28, 2001

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