COVANCE INC
10-12B/A, 1996-11-25
COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH
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                      SECURITIES AND EXCHANGE COMMISSION 

                            Washington, D.C. 20549 

   
                                    Form 10/A
                           Amendment No. 3 to Form 10
    

                 General Form For Registration of Securities 
                     Pursuant to Section 12(b) or (g) of 
                     the Securities Exchange Act of 1934 

                                 COVANCE INC. 
           (formerly known as Corning Pharmaceutical Services Inc.) 
            (Exact name of registrant as specified in its charter) 

<TABLE>
<CAPTION>
 <S>                                             <C>
                    Delaware                            22-3265977 

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

              210 Carnegie Center 
              Princeton, New Jersey                     08540-6233 

 ---------------------------------------------   ------------------------- 
    (Address of principal executive offices)            (Zip Code) 

                               609 452 4440 
            --------------------------------------------------------
            (Registrant's telephone number, including area code) 

</TABLE>

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

<TABLE>
<CAPTION>
   <S>                                          <C>
            Title of each class                 Name of each exchange on which 
             to be so registered                each class is to be registered 
   Common Stock, with attached Preferred            New York Stock Exchange 
</TABLE>
             Stock Purchase Right 

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

                                     None 
- --------------------------------------------------------------------------------
                               (Title of class) 

<PAGE> 

                                 COVANCE INC. 

INTRODUCTION 

   
This Registration Statement on Form 10 relates to the registration under the
Securities Exchange Act of 1934, as amended, of the common stock, with attached
Preferred Stock Purchase Right, of the Registrant which is being issued as
described in the Information Statement (the "Information Statement"), dated
November 25, 1996, of Corning Incorporated. Selected pages of the Information
Statement which are related to the Registrant and the securities being
registered hereunder (the "Covance Information") are attached hereto as Exhibit
99.1 and are incorporated herein by reference in answer to the items of this
Registration Statement set forth below.
    

Item 1. Business 

The information required by this item is contained under the sections "Risk 
Factors--Risks Relating to Covance," "Business of Covance" and "The 
Relationship Among Corning, Quest Diagnostics and Covance After the 
Distributions" of the Covance Information and such sections are incorporated 
herein by reference. 

Item 2. Financial Information 

The information required by this item is contained under the sections 
"Capitalization of Covance", "Pro Forma Financial Information of Covance," 
"Selected Historical Financial Data of Covance" and "Management's Discussion 
and Analysis of Financial Condition and Results of Operations of Covance" of 
the Covance Information and such sections are incorporated herein by 
reference. 

Item 3. Properties 

The information required by this item is contained under the sections 
"Business of Covance--Facilities" and "Business of 
Covance--Services--Biomanufacturing" of the Covance Information, and such 
sections are incorporated herein by reference. 

Item 4. Security Ownership of Certain Beneficial Owners and Management 

The information required by this item is contained under the section 
"Security Ownership of Certain Beneficial Owners and Management of Covance" 
of the Covance Information and such section is incorporated herein by 
reference. 

Item 5. Directors and Executive Officers 

The information required by this item is contained under the section 
"Management of Covance" of the Covance Information and such section is 
incorporated herein by reference. 

Item 6. Executive Compensation 

The information required by this item is contained under the section 
"Management of Covance" of the Covance Information and such section is 
incorporated herein by reference. 

Item 7. Certain Relationships and Related Transactions 

The information required by this item is contained under the section 
"Management of Covance" of the Covance Information and such section is 
incorporated herein by reference. 

Item 8. Legal Proceedings 

The information required by this item is contained under the section 
"Business of Covance--Legal Proceedings" of the Covance Information and such 
section is incorporated herein by reference. 

Item 9. Market Price of and Dividends on the Registrant's Common Equity and 
        Related Stockholder Matters 

The information required by this item is contained under the sections "Risk 
Factors--Risks Relating to Covance--Absence of Dividends; Restrictions 
Imposed on Dividends by the Covance Credit Facility," "Risk Factors--Risks 
Relating to Covance--Absence of Prior Public Market," "Risk Factors--Risks 
Relating to 

                                      2 
<PAGE> 

Covance--Potential Volatility of Stock Price," "Description of Covance 
Capital Stock--Covance Common Stock-- Dividend Policy," "--Covance Common 
Stock--Listing and Trading" and "Management of Covance" of the Covance 
Information and such sections are incorporated herein by reference. 

Item 10. Recent Sales of Unregistered Securities 

Not applicable. 

Item 11. Description of Registrant's Securities to be Registered 

The information required by this item is contained under the sections 
"Description of Covance Capital Stock" and "Antitakeover Effects of Certain 
Provisions of the Covance Certificate of Incorporation and By-Laws" of the 
Covance Information and such sections are incorporated herein by reference. 

Item 12. Indemnification of Directors and Officers 

The information required by this item is contained under the section 
"Liability and Indemnification of Directors and Officers of Covance" of the 
Covance Information and such section is incorporated herein by reference. 

Item 13. Financial Statements and Supplementary Data 

The information required by this item is contained under the sections 
"Capitalization of Covance," "Pro Forma Financial Information of Covance," 
"Selected Historical Financial Data of Covance," "Management's Discussion and 
Analysis of Financial Condition and Results of Operations of Covance" and 
"Financial Statements of Covance Inc." of the Covance Information and such 
sections are incorporated herein by reference. 

Item 14. Changes in and Disagreements with Accountants on Accounting and 
Financial Disclosure 

Not applicable. 

Item 15. Financial Statements and Exhibits 

(a) Financial Statements 

   The information required by this item is contained under the section 
"Financial Statements of Covance Inc." of the Covance Information and such 
section is incorporated herein by reference. 

   (b) Exhibits 

                                      3 
<PAGE> 

<TABLE>
<CAPTION>
<S>         <C>
   
 Exhibit 
  Number    Description 
- -----------  ----------------------------------------------------------------------------------------------------- 
2.1         Form of Transaction Agreement among Corning Incorporated, Corning Life Sciences Inc., Corning 
            Clinical Laboratories Inc. (Delaware), Covance Inc. and Corning Clinical Laboratories Inc. (Michigan), 
            dated November 22, 1996 

3.1*        Certificate of Incorporation of the Registrant 

3.2*        By-Laws of the Registrant 

4.1         Form of Common Stock certificate 

4.2*        Form of Rights Agreement between Covance Inc. and Harris Trust and Savings Bank, dated December 31, 
            1996 

10.1*       Form of Tax Sharing Agreement among Corning Incorporated, Corning Clinical Laboratories Inc. and 
            Covance Inc., dated [      ], 1996 

10.2*       Form of Spin-Off Tax Indemnification Agreement between Corning Incorporated and Covance Inc., dated 
            [      ], 1996 

10.3*       Form of Spin-Off Tax Indemnification Agreement between Covance Inc. and Corning Clinical Laboratories 
            Inc., dated [      ], 1996 

10.4*       Form of Spin-Off Tax Indemnification Agreement between Corning Clinical Laboratories, Inc. and 
            Covance Inc., dated [      ], 1996 

10.5        Form of Credit Agreement among Covance Inc., Nationsbank, N.A., Wachovia Bank of Georgia, N.A. and 
            the Lenders named therein, dated November 26, 1996 

10.6        Form of Covance Inc. Employee Stock Ownership Plan 

10.7        Form of Covance Inc. Stock Purchase Savings Plan 

10.8*       Form of Covance Inc. Employees Stock Purchase Program 

10.9        Form of Covance Inc. Employee Equity Participation Program 

10.10       Form of Covance Inc. Executive Retirement Supplemental Plan 

10.11*      Form of Covance Inc. Restricted Share Plan 

10.12       Form of Covance Inc. Directors' Restricted Stock Plan 

10.13       Form of Covance Inc. Directors' Deferred Compensation Plan 

10.14*      Form of Employment Agreement between Christopher Kuebler and Covance Inc. 

10.15       Form of Executive Employment Letter 

21*         Subsidiaries of the Registrant 

27*         Financial Data Schedules 

99.1        Selected pages of the Information Statement of Corning Incorporated
            dated November 25, 1996 (pages 2; 28-31; 108-168; F-1; F-33-F-48) 
</TABLE>
    

- ---------
   
* Previously filed. 
    


                                      4 
<PAGE> 

                                  SIGNATURES 

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

                                                  COVANCE INC. 


   
Dated: November 25, 1996              By: /s/ Jeffrey S. Hurwitz
                                      Jeffrey S. Hurwitz, Corporate Senior 
                                      Vice President,
                                      General Counsel and Secretary 
    




                                      5 




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

                                                                       S&S DRAFT



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


                              TRANSACTION AGREEMENT

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



                          dated as of November 22, 1996

                                  by and among

                              CORNING INCORPORATED,

                           CORNING LIFE SCIENCES INC.,

                 CORNING CLINICAL LABORATORIES INC. (Delaware),

                                  COVANCE INC.,

                                       and

                  CORNING CLINICAL LABORATORIES INC. (Michigan)




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



<PAGE>




                                TABLE OF CONTENTS


                                
<TABLE>
         <S>            <C>                                                                                     <C>
                                                                                                                Page         
                                    ARTICLE I
                                   DEFINITIONS

         SECTION 1.01.  General.................................................................................  2
         SECTION 1.02.  References; Interpretation..............................................................  7

                                   ARTICLE II
             DISTRIBUTIONS AND OTHER TRANSACTIONS; CERTAIN COVENANTS

         SECTION 2.01.  Conditions Precedent....................................................................  7
         SECTION 2.02.  The Distributions and Other Transactions................................................  8
         SECTION 2.03.  Treatment of Fractional Shares.......................................................... 12
         SECTION 2.04.  Certain Intercompany Financial and Other Arrangements................................... 12
         SECTION 2.05.  Certain Indebtedness and Capital Structure.............................................. 13
         SECTION 2.06.  Further Assurances...................................................................... 13
         SECTION 2.07.  No Representations or Warranties........................................................ 14
         SECTION 2.08.  Guarantees.............................................................................. 14
         SECTION 2.09.  Certain Transactions.................................................................... 15
         SECTION 2.10.  Insurance............................................................................... 15

                                   ARTICLE III
                                 INDEMNIFICATION

         SECTION 3.01.  Indemnification by Corning.............................................................. 15
         SECTION 3.02.  Indemnification by CCL.................................................................. 22
         SECTION 3.03.  Indemnification by Covance.............................................................. 23
         SECTION 3.04.  Adjustments for Indemnification Obligations............................................. 23
         SECTION 3.05.  Procedures for Indemnification - Third Party Claims..................................... 23
         SECTION 3.06.  Survival of Indemnities................................................................. 25
         SECTION 3.07.  Payments................................................................................ 25

                                   ARTICLE IV
                              ACCESS TO INFORMATION

         SECTION 4.01.  Provision of Corporate Records.......................................................... 25
         SECTION 4.02.  Access to Information................................................................... 25
         SECTION 4.03.  Reimbursement........................................................................... 26
         SECTION 4.04.  Confidentiality......................................................................... 26

                                    ARTICLE V
                               DISPUTE RESOLUTION

         SECTION 5.01.  Good Faith Negotiations................................................................. 27
         SECTION 5.02.  Procedure............................................................................... 27

<PAGE>


                                       ii

                                   ARTICLE VI
                               GENERAL PROVISIONS

         SECTION 6.01.  Expenses................................................................................ 28
         SECTION 6.02.  Notices................................................................................. 28
         SECTION 6.03.  Complete Agreement; Construction........................................................ 29
         SECTION 6.04.  Ancillary Agreements.................................................................... 29
         SECTION 6.05.  Counterparts............................................................................ 29
         SECTION 6.06.  Survival of Agreements.................................................................. 29
         SECTION 6.07.  Waiver.................................................................................. 29
         SECTION 6.08.  Amendments.............................................................................. 30
         SECTION 6.09.  Assignment.............................................................................. 30
         SECTION 6.10.  Successors and Assigns.................................................................. 30
         SECTION 6.11.  Termination............................................................................. 30
         SECTION 6.12.  Subsidiaries............................................................................ 30
         SECTION 6.13.  Third Party Beneficiaries............................................................... 30
         SECTION 6.14.  Headings................................................................................ 30
         SECTION 6.15.  Specific Performance.................................................................... 30
         SECTION 6.16.  Governing Law........................................................................... 31
         SECTION 6.17.  Public Announcements.................................................................... 31
         SECTION 6.18.  Severability............................................................................ 31





<PAGE>


                                      iii


         SCHEDULES
          

         Schedule 2.08     Guarantees

         EXHIBITS

         Exhibit A         Forms of Contribution Agreement, Liabilities Undertaking, Bill of Sale
                           and Assignment and Instrument of Assignment and Assumption
         Exhibit B         Form of Plan of Liquidation and Dissolution of CLSI
         Exhibit C         Certificate of Ownership and Merger and Certificate of Merger, with
                           attached Agreement and Plan of Merger and Complete Liquidation
                           (Covance CAPS into Covance)
         Exhibit D         Form of Insurance Agreement
         Exhibit E         Form of Services Agreement
         Exhibit F         Form of Spin-off Tax Indemnification Agreements
         Exhibit G         Form of Tax Sharing Agreement
         Exhibit H         Forms of Amended Charter and By-Laws of CCL
         Exhibit I         Forms of Amended Charter and By-Laws of Covance


</TABLE>



<PAGE>




                  TRANSACTION AGREEMENT dated as of November 22, 1996, by and
among CORNING INCORPORATED, a New York corporation ("Corning"), CORNING LIFE
SCIENCES INC., a Delaware corporation ("CLSI"), CORNING CLINICAL LABORATORIES
INC., a Delaware corporation ("CCL"), COVANCE INC., a Delaware corporation
("Covance") and CORNING CLINICAL LABORATORIES INC., a Michigan corporation ("CCL
(MI)").


                              W I T N E S S E T H:

                  WHEREAS, Corning is the common parent of a consolidated group
which includes CLSI, CCL, Covance and CCL (MI);

                  WHEREAS, the Board of Directors of Corning has determined that
it is appropriate and desirable to distribute to the holders of shares of common
stock, par value $0.50 per share, of Corning (the "Corning Common Shares") all
the outstanding shares of common stock of CCL (the "CCL Common Stock") and,
immediately following such distribution, for CCL to distribute to the holders of
CCL Common Stock all the outstanding shares of common stock of Covance (the
"Covance Common Stock");

                  WHEREAS, each of Corning, CCL and Covance has determined that
it is necessary and desirable to set forth the principal corporate transactions
required to effect such distribution and to set forth other agreements that will
govern certain other matters following the distribution;

                  WHEREAS, each of Corning, CCL and Covance has determined that
it is necessary and desirable to allocate and assign responsibility for those
liabilities in respect of the activities of the businesses of such entities on
the Distribution Date (as defined herein) and those liabilities in respect of
other businesses and activities of Corning and its former subsidiaries and other
matters;

                  WHEREAS, Corning currently owns 100% of the stock of CLSI;

                  WHEREAS, CLSI currently owns 100% of the stock of CCL;

                           WHEREAS, CCL currently owns 100% of the stock of each
                  of Covance and CCL (MI);

                           WHEREAS, Covance currently owns 100% of the stock of
                  Covance Clinical and Periapproval Services Inc. (formerly
                  Corning Besselaar, Inc.) ("Covance CAPS"); and



<PAGE>


                                        2

                  WHEREAS, prior to the Distribution Date, CLSI will contribute
to CCL substantially all of its assets other than the stock of CCL in exchange
for additional shares of CCL Common Stock, shares of voting preferred stock of
CCL and cash and will contribute to CCL (MI) certain of its obligations and
liabilities and Corning will cause CLSI to dissolve and Covance CAPS to be
merged with and into Covance.

                  NOW, THEREFORE, in consideration of the mutual agreements,
provisions and covenants contained in this Agreement, the parties hereby agree
as follows:


                                    ARTICLE I
                                   DEFINITIONS

                  SECTION 1.01. General. As used in this Agreement, the
following terms shall have the following meanings (such meanings to be equally
applicable to both the singular and plural forms of the terms defined):

                  "Action" shall mean any action, suit, arbitration, inquiry,
proceeding or investigation by or before any court, any governmental or other
regulatory or administrative agency, body or commission or any arbitration
tribunal.

                  "Affiliate" shall mean, when used with respect to a specified
person, another person that directly, or indirectly through one or more
intermediaries, will control or will be controlled by or will be under common
control with the person specified immediately following the Effective Time.

                  "Agent" shall have the meaning as defined in Section 2.02(g).

                  "Agreement Disputes" shall have the meaning as defined in
         Section 5.01.

                  "Ancillary Agreements" shall mean the Insurance Agreement, the
         Intellectual Property Agreement, the Services Agreement, the Spin-off
         Tax Indemnification Agreements and the Tax Sharing Agreement.

                  "Assignee" shall have the meaning as defined in Section
         2.02(i)(ii).

                  "CCL" shall mean Corning Clinical Laboratories Inc., a
         Delaware corporation.

                  "CCL Business" shall mean all businesses and operations
         conducted by (i) CLSI, MRL Nucor, Inc. and all current and former
         subsidiaries of CLSI (other than Covance Biotechnology Services Inc.
         (formerly CORNING Bio Inc.), Covance and its 



<PAGE>


                                        3

Subsidiaries, Pharmaceutical Laboratory Services, Inc., Quanterra Incorporated,
California Analytical Laboratory, Chemical Research Laboratories, Inc., Enseco
Incorporated, ERCO, Rocky Mountain Analytical Laboratory and Wadsworth/Alert
Laboratories, Inc.), including without limitation CCL (but excluding in any
event the environmental testing business previously conducted by CCL); and (ii)
any business entities acquired or established by or for CCL or any of its
Subsidiaries after the date of this Agreement.

                  "CCL Indemnitees" shall mean CCL, each Affiliate of CCL, each
of their respective directors and officers and each of the heirs, executors,
successors and assigns of any of the foregoing.

                  "CCL Liabilities" shall mean, collectively, (i) all the
Liabilities of CCL and its Subsidiaries under this Agreement and any of the
Ancillary Agreements, and (ii) all the Liabilities of the parties hereto or
their respective Subsidiaries (whenever arising whether prior to, at or
following the Effective Time) arising out of or in connection with or otherwise
relating to the management or conduct before or after the Effective Time of the
CCL Business.

                  "CCL (MI)" shall mean Corning Clinical Laboratories Inc., a
Michigan corporation.

                  "CCL Record Holders" shall mean all holders of CCL Common
Stock as of the Distribution Record Date, provided that the CCL Record Holders
shall be deemed to be determined immediately following the distribution of CCL
Common Stock to all Corning Record Holders.

                  "CLSI" shall mean Corning Life Sciences Inc., a Delaware
         corporation.

                  "CLSI Revolver" shall mean the Revolving Credit Agreement
dated December 1, 1994 between Corning and CLSI.

                  "Code" shall mean the Internal Revenue Code of 1986, as
amended, and the Treasury regulations promulgated thereunder, including any
successor legislation.

                           "Commission" shall mean the Securities and Exchange
                  Commission.

                  "Company Policies" shall mean all Policies, current or past,
which are or at any time were maintained by or on behalf of or for the benefit
or protection of Corning or any of its predecessors which relate to the Corning
Business, the CCL Business or the Covance Business, or current or past
directors, officers, employees or agents of any of the foregoing Businesses.




<PAGE>


                                        4


                  "Corning" shall mean Corning Incorporated, a New York
         corporation.

                  "Corning Business" shall mean (i) all businesses and
operations of Corning and its subsidiaries other than the CCL Business and the
Covance Business and (ii) the environmental testing business previously
conducted by CCL and its Subsidiaries, including California Analytical
Laboratory, Chemical Research Laboratories, Inc., Enseco Incorporated, ERCO,
Quanterra Incorporated, Rocky Mountain Analytical Laboratory and Wadsworth/Alert
Laboratories, Inc.

                  "Corning Indemnitees" shall mean Corning, each Affiliate of
Corning, each of their respective directors and officers and each of the heirs,
executors, successors and assigns of any of the foregoing.

                  "Corning Liabilities" shall mean all the Liabilities of
Corning and its Subsidiaries under this Agreement and any of the Ancillary
Agreements, and all the Liabilities of Corning and its subsidiaries that are not
CCL Liabilities or Covance Liabilities including, without limitation, all
Liabilities under any employee benefit plans maintained by Corning and any stock
option employment or consulting agreements to which Corning is a party,
including any such benefit plans or agreements covering or with persons who are
or were employees of CCL or Covance and their respective Subsidiaries.
Notwithstanding the foregoing, the remaining payment obligations under the
Agreement dated June 7, 1995 among Corning, CLSI and Ralph H. Thurman and the
Consulting Agreement dated June 7, 1995 among Corning, CLSI and Ralph H. Thurman
shall be CCL Liabilities and not Corning Liabilities.

                  "Corning Record Holders" shall mean all holders of record of
Corning Common Shares as of the Distribution Record Date.

         "Covance" shall mean Covance Inc., a Delaware corporation (formerly
known as Corning Pharmaceutical Services Inc.).

         "Covance Business" shall mean all businesses and operations conducted
by (i) all current and former subsidiaries of Covance and by Covance
Biotechnology Services Inc. and Pharmaceutical Laboratory Services, Inc. prior
to the Effective Time; and (ii) any business entities acquired or established by
or for Covance or any of its Subsidiaries after the date of this Agreement.

                  "Covance Indemnitees" shall mean Covance, each Affiliate of
Covance, each of their respective directors and officers and each of the heirs,
executors, successors and assigns of any of the foregoing.



<PAGE>


                                        5

                  "Covance Liabilities" shall mean, collectively, (i) all the
Liabilities of Covance and its Subsidiaries under this Agreement and any of the
Ancillary Agreements, and (ii) all the Liabilities of the parties hereto or
their respective Subsidiaries (whenever arising whether prior to, at or
following the Effective Time) arising out of or in connection with or otherwise


relating to the management or conduct before or after the Effective Time of the
Covance Business.

                  "Distribution Date" shall mean December 31, 1996 or such later
date as may hereafter be determined by Corning's Board of Directors as the date
as of which the Distributions shall be effected.

                  "Distribution Record Date" shall mean December 31, 1996 or
such later date as may hereafter be determined by Corning's Board of Directors
as the record date for the Distributions.

                  "Distributions" shall mean the two consecutive distributions
in the following order on the Distribution Date to (i) all Corning Record
Holders of the CCL Common Stock owned by Corning and (ii) all CCL Record Holders
of the Covance Common Stock owned by CCL.

                  "Effective Time" shall mean 11:59 p.m., New York time, on the
Distribution Date.

                  "Exchange Act" shall mean the Securities and Exchange Act of
         1934, as amended.

                  "Indemnifiable Losses" shall mean any and all losses,
liabilities, claims, damages, demands, costs or expenses (including, without
limitation, reasonable attorneys' fees and any and all reasonable and necessary
out-of-pocket expenses) whatsoever, including any and all losses, liabilities,
claims, damages, demands, costs or expenses reasonably incurred in
investigating, preparing for or defending against any Actions or potential
Actions, provided, however, that such Indemnifiable Losses shall not include
Taxes or other amounts indemnified against under the Spin-off Tax
Indemnification Agreements and the Tax Sharing Agreement.

                  "Indemnifying Party" shall have the meaning as defined in
         Section 3.04.

                           "Indemnitee" shall have the meaning as defined in
                  Section 3.04.

                  "Information Statement" shall mean the Information Statement
sent to all the Record Holders in connection with the Distributions, including
any amendment or supplement thereto.




<PAGE>


                                        6


                  "Insurance Agreement" shall mean the Insurance Agreement among
Corning, CCL and Covance, in substantially the form attached hereto as Exhibit
D.

                  "Intellectual Property Agreement" shall mean the Intellectual
Property and Licensing Agreement among Corning, CCL and Covance, in a form to be
agreed upon by the parties to this Agreement.

                  "Liabilities" shall mean any and all debts, liabilities and
obligations, absolute or contingent, matured or unmatured, liquidated or
unliquidated, accrued or unaccrued, known or unknown, whenever arising,
including, without limitation, those debts, liabilities and obligations arising
under any law, rule, regulation, Action, threatened Action, order or consent
decree of any court, any governmental or other regulatory or administrative
agency or commission or any award of any arbitration tribunal, and those arising
under any contract, guarantee, commitment or undertaking.

                  "person" shall mean any natural person, corporation, business
trust, joint venture, association, company, partnership or government, or any
agency or political subdivision thereof.

                  "Policies" shall mean insurance policies and insurance
contracts of any kind (other than life and benefits policies or contracts),
including, without limitation, primary, excess and umbrella policies,
comprehensive general liability policies, fiduciary liability, automobile,
aircraft, property and casualty, workers' compensation and employee dishonesty
insurance policies, bonds and self-insurance and captive insurance company
arrangements, together with the rights, benefits and privileges thereunder.

                  "Record Holders" shall mean the CCL Record Holders and the
Corning Record Holders, collectively.

                  "Records" shall have the meaning as defined in Section 4.01.

                  "Registration Statements" shall mean the registration
statements on Form 10 in respect of the CCL Common Stock and the Covance Common
Stock required to be filed with the Commission pursuant to Rule 12(b) under the
Exchange Act.

                  "Rules" shall have the meaning as defined in Section 5.02.


                  "Services Agreement" shall mean the Services Agreement among
Corning, CCL and Covance, in substantially the form attached hereto as Exhibit
E.


<PAGE>


                                        7


                  "Spin-off Tax Indemnification Agreement" shall mean each of
the Spin-off Tax Indemnification Agreements between or among two or more of
Corning, CCL and Covance, in substantially the form attached hereto as Exhibit
F.

                  "Subsidiary" shall mean any corporation, partnership or other
entity of which another entity (i) will own, immediately following the Effective
Time, directly or indirectly, ownership interests sufficient to elect a majority
of the board of directors (or persons performing similar functions)
(irrespective of whether at the time any other class or classes of ownership
interests of such corporation, partnership or other entity shall or might have
such voting power upon the occurrence of any contingency) or (ii) will be,
immediately following the Effective Time, a general partner or an entity
performing similar functions; provided that Bio Imaging Technologies Inc. will
be deemed to be a Subsidiary of Covance and, National Imaging Associates will be
deemed to be a Subsidiary of CCL, in each case, for all purposes of this
Agreement.

                  "Tax" shall mean all federal, state, local and foreign gross
or net income, gross receipts, withholding, franchise, transfer, estimated or
other tax or similar charges and assessments, including all interest, penalties
and additions imposed with respect to such amounts.

                  "Tax Sharing Agreement" shall mean the Tax Sharing Agreement
among Corning, CCL and Covance, in substantially the form attached hereto as
Exhibit G.

                  "Third Party Claim" shall have the meaning as defined in
         Section 3.05.

                  SECTION 1.02. References; Interpretation. References to an
"Exhibit" or to a "Schedule" are, unless otherwise specified, to one of the
Exhibits or Schedules attached to this Agreement, and references to a "Section"
are, unless otherwise specified, to one of the Sections of this Agreement.


                                   ARTICLE II
             DISTRIBUTIONS AND OTHER TRANSACTIONS; CERTAIN COVENANTS

                  SECTION 2.01. Conditions Precedent. Neither the Distributions
nor the related transactions set forth in this Agreement or in the Ancillary
Agreements shall become effective unless the following conditions have been
satisfied or waived by Corning on or before the Effective Time:

                  (a)      The Registration Statements shall have been filed by
                           CCL and Covance, as applicable, with, and declared
                           effective by, the Commission and the Information
                           Statement shall have been mailed in a timely manner
                           to all holders of Corning Common Shares prior to the
                           Distribution Date.




<PAGE>


                                        8

                  (b)      Corning shall have received a favorable ruling from
                           the Internal Revenue Service to the effect that the
                           Distributions qualify as tax-free distributions under
                           Section 355 of the Code.

                  (c)      Corning shall have received a favorable response from
                           the Commission to the "no-action request" letter
                           describing the Distributions filed by Corning with
                           the Commission.

                  (d)      The New York Stock Exchange shall have approved the
                           CCL Common Stock and Covance Common Stock for listing
                           on its exchange, subject to official notice of
                           distribution.

                  (e)      The financing arrangements among and between the
                           parties contemplated in the Information Statement
                           will have been consummated. CCL and Covance each
                           shall pay all of the expenses associated with their
                           respective financings.

                  SECTION 2.02. The Distributions and Other Transactions. (a)
         Certain Transactions. Prior to the Distribution Date:

                  (i) Covance CAPS shall be merged with and into Covance
         pursuant to the Certificate of Ownership and Merger between Covance
         CAPS and Covance and the Certificate of Merger between Covance CAPS and
         Covance, in substantially the forms attached hereto as Exhibit C, and
         in accordance with all applicable filing requirements under the
         Delaware General Corporation Law and the New Jersey Business
         Corporation Act. As a result of the merger, Covance CAPS will cease to
         exist and Covance will acquire the assets of Covance CAPS and assume
         (or take the assets of Covance CAPS subject to) the liabilities of
         Covance CAPS.

                  (ii) CLSI will contribute to CCL all of CLSI's assets other
         than the stock of CCL and CLSI's rights under certain agreements that
         CLSI agrees to transfer pursuant to Section 2.02(i) in exchange for
         200,000 additional shares of CCL Common Stock, 1,000 shares of voting
         preferred stock of CCL and $250,000 in cash from CCL pursuant to (A)
         the Contribution Agreement between CLSI and CCL, (B) the Liabilities
         Undertaking between CLSI and CCL (C) the Instrument of Assignment and
         Assumption between CLSI and CCL and (D) the Bill of Sale and Assignment
         between CLSI and CCL, each in substantially the forms attached hereto
         as Exhibit A, and in accordance with all applicable filing requirements
         under the Delaware General Corporation Law. As a result of such
         transactions, CCL will acquire the assets of CLSI and assume (or take
         the assets of CLSI subject to) the liabilities of CLSI other than (A)
         such obligations and liabilities for which either Corning or Covance is
         responsible under this Agreement or the Ancillary Agreements and (B)
         any obligations that CCL(MI) assumes pursuant to



<PAGE>


                                        9

         the following sentence. CCL (MI) shall assume (A) the first $2 million
         in principal amount of obligations of CLSI owed by CLSI to Corning
         under the CLSI Revolver and (B) the first $2 million of CLSI's
         obligations under Section 6.06(a) of the Agreement and Plan of Merger
         among Corning, Opera Acquisition Corp. and CLSI (then known as Damon
         Corporation). Following such contributions and assumptions, CLSI shall
         adopt a plan of liquidation and dissolve pursuant to the Plan of
         Liquidation and Dissolution of CLSI, substantially in the form attached
         hereto as Exhibit B, and in accordance with all applicable filing
         requirements under the Delaware General Corporation Law. As a result of
         such liquidation and dissolution, CLSI will distribute to Corning its
         remaining assets, which will consist largely of the capital stock of
         CCL, and CLSI will cease to exist.

                  (iii) No earlier than one day following the effective date for
         the transactions described in Section 2.02(a)(ii), CCL will transfer to
         certain of its subsidiaries the following shares of common stock that
         CCL will have received from CLSI pursuant to the transactions described
         in Section 2.02(a)(ii): (A) the shares of common stock of Corning
         Nichols Institute, (B) the shares of common stock of Corning Clinical
         Laboratories Inc. (Mass.) and (C) the shares of common stock of Corning
         Clinical Laboratories Inc. (MD).

                  (iv) No earlier than three (3) days following the later of the
         effective dates for the transactions described in Sections 2.02(a)(i),
         (ii) and (iii), CCL will transfer its Covance Common Stock, its entire
         interest in Pharmaceutical Laboratory Services, Inc. and its entire
         interest in Covance Biotechnology Services Inc. to Covance by
         delivering to Covance stock certificates representing each of CCL's
         share interests in such companies, accompanied by stock powers duly
         endorsed by CCL and with all required stock transfer tax stamps
         affixed. In connection therewith CCL shall deliver to Covance for
         cancellation the share certificate currently held by it representing
         Covance Common Stock and Covance shall issue to CCL new certificates
         representing the total number of newly-issued shares of Covance Common
         Stock sufficient in number to allow for an orderly and pro rata
         distribution of such Covance Common Stock to the CCL common
         shareholders.

                  (v) No earlier than three (3) days following the later of the
         effective dates for the transactions described in Sections 2.02(a)(i),
         (ii) and (iii), Corning will transfer its CCL Common Stock and its
         entire interest in MRL Nucor, Inc. to CCL by delivering to CCL stock
         certificates representing each of Corning's share interests in CCL and
         MRL Nucor, Inc., accompanied by stock powers duly endorsed by Corning
         and with all required stock transfer tax stamps affixed. In connection
         therewith Corning shall deliver to CCL for cancellation the share
         certificate then held by it representing CCL Common Stock and shall
         receive new certificates representing the total number of newly-issued
         shares of CCL Common Stock sufficient in number to



<PAGE>


                                       10

         allow for an orderly and pro rata distribution of such CCL Common Stock
         to the Corning common shareholders.

                  (b) Ancillary Agreements. On or prior to the Distribution
         Date, each of Corning, CCL and Covance shall have executed and
         delivered to each of the others, each of the Ancillary Agreements.

                  (c) Charters; By-laws. On or prior to the Distribution Date:

                  (i) All necessary actions shall have been taken to provide for
         the amendments of the Articles of Incorporation and By-laws for CCL,
         such amendments to be in substantially the forms attached hereto as
         Exhibit H.

                  (ii) All necessary actions shall have been taken to provide
         for the amendments of the Articles of Incorporation and By-laws for
         Covance, such amendments to be in substantially the forms attached
         hereto as Exhibit I.

                  (d) Benefit Plans. On or prior to the Distribution Date, any
         shareholder approvals deemed necessary for employee benefit plans shall
         have been obtained.

                  (e) Directors. On or prior to the Distribution Date, Corning
as the sole shareholder of CCL, and CCL, as the sole shareholder of Covance,
shall have taken all necessary action by written consent on or prior to the
Distribution Date to elect to the Board of Directors of CCL and the Board of
Directors of Covance the individuals identified in the Information Statement as
directors of CCL and Covance, respectively.

                  (f) Consents. The parties hereto shall use their commercially
         reasonable efforts to obtain any required consents to assignment of
         agreements hereunder, if applicable.

                  (g) Delivery of Shares to Agent. Corning shall deliver to
Harris Trust and Savings Bank (the "Agent") the share certificates representing
the CCL Common Stock and CCL shall deliver to the Agent the share certificates
representing the Covance Common Stock and Corning and CCL shall instruct the
Agent to distribute, on or as soon as practicable following the Distribution
Date, such common stock to the Corning Record Holders and the CCL Record
Holders, as the case may be, as further contemplated by the Information
Statement and herein. CCL and Covance shall provide all share certificates that
the Agent shall require in order to effect the Distributions.




<PAGE>


                                       11


                  (h) Sublease. Corning shall have entered into a sublease
         agreement with National Imaging Associates, Inc. with respect to the
         first floor of 10 Mountainview Road, Upper Saddle River, New Jersey.

                  (i) Transfer of Agreements. (i) CLSI hereby agrees that on or
prior to the date on which it is dissolved, subject to the limitations set forth
in this Section 2.02(i), it will assign, transfer and convey to Covance all of
CLSI's rights and obligations under (a) the Capital Contribution Agreement and
Shareholder Agreement dated February 22, 1995 among Corning BioPro Inc., CLSI,
Richard Hawkins, Dr. John Scarlett, Robert F. Amundsen and Dr. Nona Niland, (b)
any and all existing stock option agreements between CLSI, Corning Bio Inc. and
individual employees of Corning Bio Inc., (c) the Registration Agreement dated
as of February 22, 1995 by and between Corning BioPro Inc. and CLSI, (d) the
Joint Escrow Instructions dated February 22, 1995 by and between Corning BioPro
Inc., CLSI, Robert F. Amundsen and the Escrow Agent named therein, and (e) the
Joint Escrow Instructions dated February 22, 1995 by and between Corning BioPro
Inc., CLSI, Dr. John Scarlett and the Escrow Agent named therein. CLSI hereby
further agrees that on or prior to the date on which it is dissolved, subject to
the limitations set forth in this Section 2.02(i), it will assign, transfer and
convey to Corning all of its rights and obligations under the lease agreement
dated October 5, 1995 between 2154 Trading Corporation and CLSI with respect to
10 Mountainview Road, Upper Saddle River, New Jersey and a sublease to National
Imaging Associates with respect to a portion of such premises. CCL hereby agrees
that on or prior to the Distribution Date or as soon as reasonably practicable
thereafter, subject to the limitations set forth in this Section 2.02(i), it
will assign, transfer and convey to Corning all of CCL's rights and obligations
under the Asset Transfer Agreement dated as of May 2, 1994, as amended, among
CCL, International Technology Corporation, IT Corporation and Quanterra
Incorporated and the related closing documents thereunder, including without
limitation the General Instrument of Assignment and Assumption dated June 28,
1994 between CCL and Quanterra Incorporated. Corning hereby agrees that on or
prior to the Distribution Date or as soon as reasonably practicable thereafter,
subject to the limitations set forth in this Section 2.02(i), it will assign,
transfer and convey to Covance all of Corning's rights and obligations under
that certain Registration Agreement dated as of February 22, 1995 by and between
Corning, Dr. Nona Niland, Dr. John Scarlett, Robert F. Amundsen and Richard
Hawkins.

                  (ii) The assignee of any agreement assigned, in whole or in
part, hereunder (an "Assignee") shall assume and agree to pay, perform, and
fully discharge all obligations of the assignor under such agreement or such
Assignee's related portion of such obligations as determined in accordance with
the terms of the relevant agreement, where determinable on the face thereof, and
otherwise as determined in accordance with the practice of the parties prior to
the Distribution.




<PAGE>


                                       12

                  (iii) Notwithstanding anything in this Agreement to the
contrary, this Agreement shall not constitute an agreement to assign any
agreement, in whole or in part, or any rights thereunder if the agreement to
assign or attempt to assign, without the consent of a third party, would
constitute a breach thereof or in any way adversely affect the rights of the
Assignee thereof. Until such consent is obtained, or if an attempted assignment
thereof would be ineffective or would adversely affect the rights of any party
hereto so that the Assignee would not, in fact, receive all such rights, the 
parties will cooperate with each other in any arrangement designed to provide 
for the Assignee the benefits of, and to permit the Assignee to assume 
liabilities under, any such agreement.

                  (iv) Corning understands and agrees that approximately 10,968
Corning Common Shares are held to secure certain claims of CCL under that Escrow
Agreement dated as of October 9, 1994 (the "Escrow Agreement") among Corning,
The First National Bank of Boston and former shareholders of Moran Research
Labs, as amended, and will act at CCL's direction and at CCL's expense with
respect to those shares. The remaining Corning Common Shares held under the
Escrow Agreement are being held for the benefit of Corning.

                  (j) Other Transactions. On or prior to the Distribution Date,
each of Corning, CCL and Covance shall have consummated those other transactions
in connection with the Distributions that are contemplated by the Information
Statement and the ruling request submission by Corning to the Internal Revenue
Service dated June 17, 1996, as supplemented, and not specifically referred to
in subparagraphs (a)-(i) above.

                  SECTION 2.03. Treatment of Fractional Shares. As soon as
practicable after the Distribution Date, the Agent shall determine the number of
whole shares and fractional shares of CCL and Covance allocable to each Corning
Record Holder and CCL Record Holder, respectively, as of the Distribution Record
Date, to aggregate all such fractional shares and sell the whole shares obtained
thereby, in open market transactions or otherwise, in each case at then
prevailing trading prices, and to cause to be distributed to each such holder to
which a fractional share shall be allocable such holder's ratable share of the
proceeds of such sale, after making appropriate deductions of the amount
required to be withheld for federal income tax purposes and after deducting an
amount equal to all brokerage charges, commissions and transfer taxes attributed
to such sale. In determining the manner and timing of selling the aggregated
fractional shares, the Agent shall use its independent judgment and shall
neither consult with nor communicate its plans to Corning, CCL or Covance.

                  SECTION 2.04. Certain Intercompany Financial and Other
Arrangements. (a) Intercompany Accounts. Without limiting the terms of Section
2.05, all intercompany receivables, payables and loans (other than receivables,
payables and loans otherwise specifically provided for in any of the Ancillary
Agreements or hereunder), including, without limitation, in respect of any cash
balances, any cash balances representing deposited checks or drafts for which
only a provisional credit has been allowed or any cash held in any centralized
cash management system, between Corning, CCL, Covance or any of their respective
Subsidiaries, on the one hand, and Corning, CCL, Covance or any of their
respective Subsidiaries, on the other hand, shall, as of the Effective Time, be
settled or contributed to capital, in each case as may be agreed in writing
prior to the Effective Time by duly authorized representatives of Corning, CCL
or Covance, as applicable. Notwithstanding the foregoing, on or after the
Distribution Date, CCL shall make a payment to Corning in an amount equal to



<PAGE>


                                       13

the excess, if any, of (i) the aggregate amount of cash and cash equivalents
held by CCL and its Subsidiaries on the Distribution Date over (ii) the sum of
the aggregate principal amount of Working Capital Loans and Swingline Loans
(each as defined in the credit agreement among CCL and the banks listed therein
to be entered into prior to the Distribution Date) outstanding on the
Distribution Date, plus $40,000,000 plus the net cash proceeds from the sales of
assets identified in the credit agreement received on or prior to the
Distribution Date. If the amount calculated in accordance with clause (ii) of
the preceding sentence, less $10,000,000, is greater than the amount calculated
in accordance with clause (i) then, on or after the Distribution Date, Corning
shall make a payment to CCL in an amount equal to the difference between such
calculations.

                  (b) Operations in Ordinary Course. Each of CCL and Covance
covenants and agrees that, except as otherwise provided in any Ancillary
Agreement, during the period from the date of this Agreement through the
Distribution Date, it will, and will cause any entity that is a Subsidiary of
such party at any time during such period to, conduct its business in a manner
substantially consistent with current and past operating practices and in the
ordinary course, including, without limitation, with respect to the payment and
administration of accounts payable and the administration of accounts
receivable, the purchase of capital assets and equipment and the management of
inventories.

                  SECTION 2.05. Certain Indebtedness and Capital Structure.
Corning, CCL and Covance each agree to use their respective commercially
reasonable efforts to achieve both an allocation of consolidated indebtedness of
Corning and a capital structure (including cash position) of each of CCL and
Covance so as to substantially reflect the respective capital structures after
the Distributions of CCL and Covance set forth in the Information Statement
under the headings "Capitalization of CCL" and "Capitalization of Covance".

                  SECTION 2.06. Further Assurances. In case at any time after
the Effective Time any further action is reasonably necessary or desirable to
carry out the purposes of this Agreement and the Ancillary Agreements, the
proper officers of each party to this Agreement shall take all such necessary
action. Without limiting the foregoing, Corning, CCL and Covance shall use their
commercially reasonable efforts to obtain all consents and approvals, to enter
into all amendatory agreements and to make all filings and applications that may
be required for the consummation of the transactions contemplated by this
Agreement and the Ancillary Agreements, including, without limitation, all
applicable governmental and regulatory filings.


<PAGE>


                                       14

                 SECTION 2.07. No Representations or Warranties. Each of the 
parties hereto understands and agrees that, except as otherwise expressly 
provided, no party hereto is, in this Agreement, in any Ancillary Agreement or 
in any other agreement or document contemplated by this Agreement or otherwise,
making any representation or warranty whatsoever, including, without limitation,
as to title, value or legal sufficiency.

                  SECTION 2.08. Guarantees. (a) Except as otherwise specified in
any Ancillary Agreement, Corning, CCL and Covance shall use their commercially
reasonable efforts to have, on or prior to the Distribution Date, or as soon as
practicable thereafter, Corning and any of its Subsidiaries removed as guarantor
of or obligor for any CCL Liability or Covance Liability, including, without
limitation, in respect of those guarantees set forth on Schedule 2.08(a), and to
the extent any such guarantee is not removed, CCL or Covance, as the case may
be, will indemnify Corning for all Indemnifiable Losses related to or arising
from such guarantee, in accordance with the procedures set forth in Section 3.05
and will pay Corning a fee reflecting Corning's continuing role as guarantor.

                  (b) Except as otherwise specified in any Ancillary Agreement,
Corning, CCL and Covance shall use their commercially reasonable efforts to
have, on or prior to the Distribution Date, or as soon as practicable
thereafter, CCL and any of its Subsidiaries removed as guarantor of or obligor
for any Corning Liability or Covance Liability, including, without limitation,
in respect of those guarantees set forth on Schedule 2.08(b), and to the extent
any such guarantee is not removed, Corning or Covance, as the case may be, will
indemnify CCL for all Indemnifiable Losses related to or arising from such
guarantee, in accordance with the procedures set forth in Section 3.05 and will
pay CCL a fee reflecting CCL's continuing role as guarantor.

                  (c) Except as otherwise specified in any Ancillary Agreement,
Corning, CCL and Covance shall use their commercially reasonable efforts to
have, on or prior to the Distribution Date, or as soon as practicable
thereafter, Covance and any of its Subsidiaries removed as guarantor of or
obligor for any Corning Liability or CCL Liability, including, without
limitation, in respect of those guarantees set forth on Schedule 2.08(c), and to
the extent any such guarantee is not removed, Corning or CCL, as the case may
be, will indemnify Covance for all Indemnifiable Losses related to or arising
from such guarantee, in accordance with the procedures set forth in Section 3.05
and will pay Covance a fee reflecting Covance's continuing role as guarantor.



<PAGE>


                                       15


                  SECTION 2.09. Certain Transactions. (a) On or prior to the
Distribution Date, and in accordance to Section 2.02(b), Corning, CCL and
Covance shall enter into (i) the Tax Sharing Agreement which shall govern, among
other things, their respective rights and obligations with respect to Taxes of
CCL and Covance and each of their respective Subsidiaries for all periods
through the Distribution Date and certain other tax-related matters; and (ii)
the Spin-off Tax Indemnification Agreements which shall, among other things,
restrict CCL and Covance from engaging in certain activities that might
jeopardize the continuing tax-free treatment of the Distributions.

                  (b) Following the Distribution Date, Corning, CCL and Covance
shall each comply with and otherwise not take any action inconsistent with each
representation and statement made, or to be made, to the Commission in
connection with the "no-action request" letter describing the Distributions
filed by Corning with the Commission.

                  SECTION 2.10. Insurance. Except as contemplated by the
Insurance Agreement, any and all coverage of CCL, Covance and their respective
Subsidiaries under Company Policies has terminated or will terminate (and will
not be replaced by Corning) no later than the Effective Time.


                                   ARTICLE III
                                 INDEMNIFICATION

                  SECTION 3.01. Indemnification by Corning. (a) Except as
otherwise specifically set forth in any provision of this Agreement or of any
Ancillary Agreement, Corning shall indemnify and hold harmless the CCL
Indemnitees and the Covance Indemnitees from and against any and all
Indemnifiable Losses of the CCL Indemnitees and the Covance Indemnitees,
respectively, arising out of, by reason of or otherwise in connection with (i)
the Corning Liabilities or (ii) the breach by Corning of any provision of this
Agreement or any Ancillary Agreement.

                  (b) Corning shall indemnify and hold harmless CCL and its
Subsidiaries from and against any and all monetary payments by or on behalf of
CCL or any of its Subsidiaries (other than criminal fines or penalties imposed
upon former or current employees of CCL or its subsidiaries) to the United
States government or one of the States of the United States or any of their
respective departments, branches or agencies arising out of any investigation or
claim by or on behalf of the United States government or one of the States of
the United States or any of their respective departments, branches or agencies,
whether criminal, civil or administrative in nature which investigation or claim
has been settled prior to the Distribution Date or is pending as of the
Distribution Date pursuant to service of subpoena or other notice of such
investigation to Corning, CCL or any of its Subsidiaries, as well as any qui tam
proceeding for which a complaint was filed prior to the Distribution Date
whether or not Corning, CCL or any Subsidiary of CCL has been served with such
complaint or otherwise been notified of the pendency of such action, but only to
the extent such investigations or claims arise out of or are related to alleged
violations of (i) the federal civil False Claims Act (31 USC ss. 3729, et seq.)
and its criminal counterpart (18 USC ss. 287), (ii) Medicare and Medicaid fraud
(42 USC ss. 1320a-7(b)(a)(1)), (iii) the Civil Monetary Penalties Law (42 USC
ss.ss. 1320a-7a and 1320a-7(b)(b)), (iv) mail fraud and wire fraud statutes (18
USC ss.ss. 1341 and 1343), (v) false statements (18 USC ss. 1301), (vi)
conspiracy (18 USC ss. 371), (vii) money laundering (18 USC ss. 1956, et seq.),
(viii) RICO (18 USC ss. 1961), (ix) Title II of the Health Insurance Portability
and Accountability Act of 1996, (x) Title XVIII of the Social Security



<PAGE>


                                       16

Act (42 USC ss.ss. 1395-1395ccc) (the Medicare statute), (xi) Title XIX of the
Social Security Act (42 USC ss.ss. 1396, et seq.) (the Medicaid statute), (xii)
the Programs Fraud Civil Remedies Act (31 USC ss.ss. 3801, et seq.); or (xiii)
the federal Anti-Kickback Act (42 USC ss.ss. 52, et seq.) arising out of the
billing or alleged overbilling by CCL or any past or present subsidiary of CLSI
(or any of their predecessors) of any federal program or agency, or any
federally supported state health care program or agency, or any beneficiary of
any of them, for services provided to any such beneficiary thereof by CCL, any
Subsidiary of CCL or any past or present subsidiary of CLSI (or any of their
predecessors).

                  (c) In the event that CCL or its Subsidiaries make monetary
payments in excess of forty-two million dollars ($42,000,000) within the period
beginning on the Distribution Date and ending five (5) years thereafter in
respect of claims by nongovernmental persons relating to or arising out of the
investigations or claims referred to in Section 3.01(b) and alleging
overbillings of such person or any beneficiary of such person by CCL, its
Subsidiaries or any past or present subsidiary of CLSI (or any of their
predecessors) for services provided prior to the Distribution Date to such
person or beneficiary thereof by CCL, its Subsidiaries or any past or present
subsidiary of CLSI (or any of their predecessors), then Corning shall indemnify
and hold harmless CCL and its Subsidiaries from and against fifty percent (50%)
of up to fifty million dollars ($50,000,000) in the aggregate of such monetary
payments actually paid by CCL or any Subsidiary of CCL in excess of such
forty-two million dollars ($42,000,000) in respect of such alleged overbillings.

                  (d) (i) Except as otherwise agreed by Corning and CCL or
unless otherwise required by a change in applicable law or regulations, a
contrary judicial decision, adverse determination by a Taxing authority, or a
contrary published ruling (in each case, subsequent to the date hereof), all
payments made by Corning to CCL, or to another party for the benefit of CCL,
pursuant to Section 3.01(b) and Section 3.01(c) shall be treated as nontaxable
capital contributions by Corning to CCL and the parties shall report the
payments consistent with such treatment for Tax purposes

                  (ii) Each amount indemnified against by Corning pursuant to
Section 3.01(b) and Section 3.01(c) shall be reduced by (1) the product of (x)
the amount of any Tax deduction used to reduce the Tax liability of CCL, any CCL
Subsidiary (CCL and the CCL Subsidiaries shall be referred to in this Section
3.01(d) individually as a "CCL Company" and collectively as the "CCL Companies")
or any combined or consolidated group which has any of the CCL Companies as a
member and which does not have Corning as a member (referred to in this Section
3.01(d) as the "CCL Group") to the extent such Tax deduction is attributable to
the portion of the payment, loss, expense or other item indemnified against by
Corning and (y) the maximum marginal statutory rate (exclusive of any surtax
rate or other marginal rate imposed in lieu of a surtax to eliminate the
benefits of a lower marginal rate) at which the Tax to which such deduction
relates is imposed for the taxable year in which the CCL Company or the CCL
Group uses the Tax deduction to reduce its Tax liability, and (2) the amount of
any other Tax



<PAGE>


                                       17

credit, benefit or other similar item (a "Tax Benefit Item") used to reduce the
Tax liability of any CCL Company or the CCL Group to the extent the Tax Benefit
Item is attributable to the portion of the payment, loss, expense or other item
indemnified against by Corning.

                  (iii) For purposes of determining whether any Tax deduction or
Tax Benefit Item of any CCL Company attributable to the portion of a payment,
loss, expense or other item indemnified against by Corning (a "Corning
Deduction") is used to reduce the Tax liability of any CCL Company or the CCL
Group, it shall be assumed that all losses and deductions of such CCL Company or
the CCL Group (including carryforwards and carrybacks (unless otherwise excluded
below) of net operating losses or other items) other than Corning Deductions are
applied in reduction of such CCL Company's or the CCL Group's Tax liability
before any Corning Deductions are so applied, except that Tax deductions and Tax
Benefit Items attributable to the following items shall be deemed to be applied
to reduce such CCL Company's or the CCL Group's Tax liability after using (in
determining such Tax liability) all available Corning Deductions: (i) Special
Events (as defined below), (ii) claims against which Corning has partially
indemnified CCL pursuant to Section 3.01(c) (other than payments applied toward
the $42,000,000 threshold specified in Section 3.01(c)) and (iii) carrybacks of
losses or other Tax items from Tax years subsequent to the Tax year in which the
amount indemnified against under Sections 3.01(b) or (3.01(c) is paid by
Corning. Special Event shall mean a material event that is unusual in nature or
occurs infrequently (but not both) and is unrelated to normal operations
(including, without limitation, entering or exiting businesses, sales or other
dispositions, litigation or regulatory settlements, restructuring reserves), but
does not include operating items such as start-up expenses and receivable
reserves. For this purpose, material means an event or series of related events
involving amounts exceeding 5 percent of CCL's pre-tax income (determined on a
consolidated basis).

                  (iv) Corning shall make estimated payments to CCL, or another
party for the benefit of CCL, pursuant to Section 3.01(b) and Section 3.01(c)
(the "Estimated Payments") which shall be calculated in good faith by CCL and
Corning by taking into account the adjustments required by Section 3.02(d)(ii)
and Section 3.01(d)(iii) to the extent practical (based on information available
to the parties at the time the Estimated Payment is made as to the proper tax
treatment of the item, CCL's projected Tax liability (including for estimated
Tax payments), or losses for the year in which the Estimated Payment is made
(without taking into account the use of Corning Deductions in future years),
prior Tax return positions and other factors the parties deem relevant).
Estimated Payments shall be paid by Corning (1) if paid to a CCL Company, as
directed by CCL, within 15 business days after written notice from CCL to
Corning indicating that the underlying obligation indemnified against by Corning
has been paid by a CCL Company (which notice shall include any documentation
reasonably requested by Corning establishing the amount and Tax treatment of
such payment) or, (2) if paid directly by Corning for the benefit of a CCL
Company, within 15 business days after written notice from CCL that the
obligation has been settled or is otherwise due (which notice shall include to
whom such payment should be made, the amount of the payment, an executed copy of
the



<PAGE>


                                       18

settlement or other agreement and any other documentation reasonably requested
by Corning establishing the amount and Tax treatment of such payment); provided,
however, that failure to give such notification shall not affect the
indemnification provided hereunder except to the extent Corning shall have been
actually prejudiced as a result of such failure.

                  (v) Within 60 business days following the close of the Tax
year in which an Estimated Payment is made and each tax year thereafter until
the Corning Deductions (as adjusted under Sections 3.01(d)(ii) and 3.01(d)(iii))
are fully used by the CCL Companies to reduce the Tax liability of the CCL Group
or any CCL Member, CCL shall compute the amount by which any reduction in the
Tax liability of a CCL Company or the CCL Group for such Tax year attributable
to a Corning Deduction decreases the after-Tax indemnity payable by Corning
under Sections 3.02(d)(ii) and (iii). CCL shall submit such computation in
writing to Corning (together with such other documentation as is reasonably
necessary to demonstrate how the reduction was computed) for review and approval
by Corning, which approval shall not be unreasonably withheld, within 20
business days of the receipt by Corning of such computation prepared by CCL. If
Corning does not approve of such computation and the parties cannot otherwise
agree on such computation, then the disagreement shall be resolved under Section
3.01(d)(ix). Promptly following agreement by the parties as to the computation
required under this paragraph, either CCL shall pay to Corning an adjusting
payment if the amount of such after-Tax indemnity payable by Corning under
Sections 3.01(d)(ii) and 3.01(d)(iii) is less than the aggregate amount of
Estimated Payments made to CCL for such Tax year and prior years (net of any
prior adjusting payments) or Corning shall pay to CCL an adjusting payment if
the amount of such after-Tax indemnity payable by Corning under Section
3.02(d)(ii) and (iii) exceeds the aggregate amount of Estimated Payments made to
CCL for such Tax year and prior years (net of any prior adjusting payments).

                  (vi) CCL shall consult with Corning and CCL and Corning shall
determine the Tax treatment by any CCL Company or the CCL Group of any payment,
loss, expense or other amount indemnified against by Corning under Section
3.01(b) or Section 3.01(c) provided that neither the CCL Group nor any CCL
Company nor Corning shall be required to take a position on any Tax return for
which there is no reasonable basis. If requested by CCL, Corning at its expense
will provide CCL with an opinion of independent tax counsel selected by Corning
(provided such counsel is not reasonably objected to by CCL) to the effect that
there exists a reasonable basis for the treatment proposed by Corning as part of
such determination. The parties shall report the payments consistent with the
treatment as determined by them for Tax purposes.

                  (vii) If any payments are made by Corning pursuant to Section
3.01(b) or Section 3.01(c), and calculated and paid pursuant to this Section
3.01(d), and the amount of the after-Tax indemnity payable by Corning pursuant
to such sections would have been different if the computation of such
indemnification payment were made at a later time (because of final settlements
or final dispositions of audit adjustments, administrative or judicial
proceedings,



<PAGE>


                                       19

amended returns, utilization or disallowance of Corning Deductions in subsequent
Tax periods or other reasons), then the amount of such indemnification shall be
recomputed by CCL and Corning at such later time by taking into account such
subsequent events and the parties shall make an adjusting payment between each
other as is appropriate because of such recomputation within 15 business days of
their agreement as to the amount of such adjusting payment.

                  (viii) (A) CCL shall notify Corning promptly (and in any event
within 15 business days) after receipt by any CCL Company of written notice of
any demand or claim by a Taxing authority relating to the Tax treatment of a
payment, loss, expense or other item indemnified against by Corning under
Section 3.01(b) or Section 3.01(c). Such notice shall contain factual
information (to the extent known to any CCL Company) describing the asserted tax
treatment in reasonable detail and shall include copies of any notice or other
document received from any Taxing authority. If the Taxing authority proposes in
writing an adjustment to a Corning Deduction, which adjustment if sustained
would reduce the amount of a Corning Deduction or otherwise increase the amount
indemnified against by Corning, CCL shall notify Corning promptly of such
adjustment and of all action taken or proposed to be taken by the Taxing
authority; provided, however, that failure to give such notification shall not
affect the indemnification provided hereunder except to the extent Corning shall
have been actually prejudiced as a result of such failure.

                           (B) If Corning requests within 30 days (or sooner if
the nature of the proposed adjustment so requires) after CCL's notice that the
proposed adjustment to a Corning Deduction be contested, CCL shall contest the
proposed adjustment in good faith upon receipt of an opinion of independent tax
counsel selected by Corning (provided such counsel is not reasonably objected to
by CCL) to the effect that there exists a reasonable basis that CCL will prevail
in such contest; provided, that (i) CCL shall be required to contest any
proposed adjustment beyond the level of administrative proceedings only if the j
aggregate amount of the proposed adjustment (exclusive of penalties, interest
and additions to tax) exceeds $250,000, (ii) CCL shall determine the court of
competent jurisdiction in which to contest the proposed adjustment either before
or after payment of the Tax asserted to be payable as a result thereof, (iii)
Corning shall control with counsel selected by Corning (provided such counsel is
not reasonably objected to by CCL) the prosecution of any contested adjustment
or asserted deficiency in respect of a Corning Deduction arising from an amount
indemnified against by Corning under Section 3.01(b), and CCL shall control with
counsel selected by CCL (provided such counsel is not reasonably objected to by
Corning) the prosecution of any contested adjustment or asserted deficiency in
respect of a Corning Deduction arising from an amount indemnified against by
Corning under Section 3.01(c), (iv) the controlling party shall keep the other
party informed as to the progress of any contest or litigation and, if requested
by such other party, shall consult with such other party's tax counsel, and (v)
the controlling party shall not settle, compromise or otherwise concede the
adjustment or deficiency in respect of a Corning Deduction that the controlling
party is contesting without the consent of the other party, which consent shall
not be unreasonably withheld, provided, further, that any adverse


<PAGE>


                                       20

court determination will be required to be appealed only upon receipt of an
additional opinion from independent tax counsel that there exists a reasonable
basis that the appellate court will reverse such adverse determination. CCL
shall not be required to take any action pursuant to this Section 3.01(viii)(B)
in respect of a contesting Corning Deduction relating to an amount indemnified
against by Corning under Section 3.01(b) unless Corning shall have agreed to pay
(with no net after-Tax cost to CCL) all penalties, interest and additions to tax
that CCL may incur in connection with contesting a proposed adjustment to such
Corning Deduction. The controlling party shall pay all out-of-pocket expenses
and other costs relating to a contest of an adjustment to a Corning Deduction
("Expenses"), including but not limited to fees for attorneys, accountants,
expert witnesses or other consultants retained by (or selected or controlled by)
the controlling party incurred at any time during which the controlling party is
controlling and directing the proceeding in respect of which such fees are
incurred; provided, however, that Corning shall pay CCL, in respect of a
proceeding controlled by CCL that relates to or involves a proposed adjustment
or asserted deficiency in respect of a Corning Deduction attributable to an
amount indemnified against by Corning under Section 3.01(c), that proportion of
the Expenses relating to the proceeding and involving such deduction as is equal
to the ratio of (i) the amount of the adjustment or deficiency that relates to
such Corning Deduction at issue in the proceeding and (ii) the total adjustments
at issue in the proceeding that relate to claims by nongovernmental persons
described in Section 3.01(c).

                           (C)      If asserted liabilities unrelated to the 
matters contemplated herein become grouped with contests arising hereunder, the
parties shall use their respective best efforts to cause the contest arising
hereunder to be the subject of a separate proceeding. If such severance is not
possible, Corning shall control only the prosecution of any contested adjustment
or asserted deficiency in respect of a Corning Deduction arising from an amount
indemnified against by Corning under Section 3.01(b), and CCL shall have sole
discretion to determine the court of competent jurisdiction in which to contest
the proposed adjustment either before or after payment of the tax asserted to be
payable, provided that CCL shall not settle, compromise or otherwise concede any
such contested adjustment or asserted deficiency without the consent of Corning,
which consent shall not be unreasonably withheld. If CCL pays a disputed amount
of Taxes resulting from a disallowed Corning Deduction arising from an amount
indemnified against by Corning under Section 3.01(b) or Section 3.01(c), and
brings suit for refund, Corning shall advance the disputed amount of Taxes (but
only to the extent of the portion of such disputed Taxes as is attributable to
the disallowance of such Corning Deduction) to CCL within 15 business days of
such payment by CCL. If CCL subsequently receives a refund or credit, of all or
a part of the amount of disputed Taxes advanced by Corning, CCL shall promptly
pay (and in any event within 15 business days) to Corning an amount equal to the
portion of such refund or credit attributable to a Corning Deduction together
with any interest received (including by offset) by CCL from the Taxing
authority with respect to such portion. With respect to matters arising
hereunder controlled by Corning, and where deemed necessary by Corning, CCL
shall itself, and shall compel any


<PAGE>


                                       21

CCL Subsidiary to, authorize by appropriate powers of attorney such persons as
Corning shall designate to represent CCL, or such CCL Subsidiary, with respect
to such matters.

                  (ix) If Corning and CCL are unable to agree on the proper
calculation or treatment of a payment or other obligation, a Tax deduction or
Tax Benefit Item or any other item described in this Section 3.01(d), then such
disputed item or items shall be resolved by a nationally recognized accounting
or law firm chosen and mutually acceptable to both parties. Such accounting or
law firm shall resolve the dispute within 30 days of having the item or items
referred to it and such resolution shall be binding on the parties. The costs,
fees and expenses of the accounting or law firm shall be borne equally by
Corning and CCL. In the event the parties are not able to agree on an accounting
or law firm, each party shall select its own nationally recognized law firm (and
bear the costs, fees and expenses thereof) and such law firms shall select a
nationally recognized accounting or law firm which accounting or law firm shall
be deemed to be mutually acceptable to both parties for the purpose of applying
this provision. Nothing in this Section 3.01(d) shall require either party to
take any position on a Tax return or for Tax purposes for which there is no
reasonable basis.

                  (x) All payments under Sections 3.01(b), 3.01(c) and 3.01(d)
shall be made without gross-up for Taxes, except if (A) the Tax liability of
Corning or a consolidated or combined group which has Corning as a member and
which does not have CCL as a member (the "Corning Group") is actually reduced by
a Tax deduction attributable to the payment by Corning of an amount indemnified
against by Corning under Sections 3.01(b) or 3.01(c) in any tax year that ends
after the Distribution Date because such payment is properly treated as an
deduction against ordinary income for Corning or the Corning Group in computing
its Taxable income for such year (a "CCL Payment Deduction") and (B) the Tax
Liability of any CCL Company or the CCL Group for such year is actually
increased by such payment because such payment is properly treated as an item of
ordinary income for any CCL Company or the CCL Group, then Corning shall pay to
CCL an amount equal to the lesser of the amount of such Corning Tax reduction
and the amount of such CCL Tax increase, within 15 business days after the
parties agree on the amount of the Corning Tax reduction and CCL Tax increase,
provided, however, any payment by Corning to CCL shall be net of Taxes imposed
on Corning or the Corning Group in respect of amounts paid by CCL to Corning
under Section 3.01(d). For purposes of computing a Corning Tax increase, it
shall be assumed that all losses and deductions other than the CCL Payment
Deduction are applied to reduce the Tax Liability of Corning or the Corning
Group before the CCL Payment Deduction is so applied.

                  (e) Notwithstanding anything to the contrary in this
agreement, Corning shall not indemnify, defend or hold harmless CCL or any
Subsidiary of CCL against (x) costs and expenses relating to the investigations
or claims referred to in Sections 3.01(b) and (c) (including, without
limitation, fees and expenses of attorneys, consultants and other agents of CCL
or any Subsidiary of CCL), or (y) losses of revenues or profits that may arise
as a consequence of the claims or investigations referred to in Sections 3.01(b)
or 3.01(c) or the



<PAGE>


                                       22

settlements entered into or judgments rendered as a result thereof or as a
consequence of any exclusion from participation in any federal or state health
care program, or (z) any other consequential or incidental damages that may be
incurred by CCL or any Subsidiary of CCL, in each case which relates to the
billing of any person or any beneficiary of such person by CCL, any Subsidiary
of CCL or any past or present subsidiary of CLSI (or any of their predecessors)
for services provided to any such person or beneficiary thereof by CCL, any
Subsidiary of CCL or any past or present subsidiary of CLSI (or any of their
predecessors).

                  (f) All indemnification obligations of Corning pursuant to
this Section 3.01 may be made or assumed by an Affiliate of Corning to the
extent deemed necessary or desirable by Corning in its sole discretion;
provided, however, that Corning shall remain liable for such obligations.

                  SECTION 3.02. Indemnification by CCL. Except as otherwise
specifically set forth in any provision of this Agreement or of any Ancillary
Agreement, CCL shall indemnify and hold harmless the Corning Indemnitees and the
Covance Indemnitees from and against any and all Indemnifiable Losses of the
Corning Indemnitees and the Covance Indemnitees, respectively, arising out of,
by reason of or otherwise in connection with (i) the CCL Liabilities or (ii) the
breach by CCL of any provision of this Agreement or any Ancillary Agreement;
provided, however, that CCL is under no obligation to indemnify or hold harmless
Corning from and against any Indemnifiable Losses arising out of, or by reason
of or otherwise in connection with any and all monetary payments by Corning in
respect of (i) the investigations or claims referred to in Section 3.01(b) or
(ii) claims referred to in Section 3.01(c) as to which no CCL Indemnitee is a
party.

                  SECTION 3.03. Indemnification by Covance. Except as otherwise
specifically set forth in any provision of this Agreement or of any Ancillary
Agreement, Covance shall indemnify and hold harmless the Corning Indemnitees and
the CCL Indemnitees from and against any and all Indemnifiable Losses of the
Corning Indemnities and the CCL Indemnitees, respectively, arising out of, by
reason of or otherwise in connection with (i) the Covance Liabilities or (ii)
the breach by Covance of any provision of this Agreement or any Ancillary
Agreement.

                  SECTION 3.04. Adjustments for Indemnification Obligations. If
the amount that any party (an "Indemnifying Party") is or may be required to pay
to any other person (an "Indemnitee") pursuant to Section 3.01, Section 3.02 or
Section 3.03, as applicable, shall, at any time subsequent to the payment
required by this Agreement, be reduced by insurance or other recovery,
settlement or otherwise, the amount of such reduction, less any expenses
incurred in connection therewith, shall promptly be repaid by the Indemnitee to
the Indemnifying Party, up to the aggregate amount of any payments received from
such Indemnifying Party pursuant to this Agreement in respect of such
Indemnifiable Loss.




<PAGE>


                                       23

                  SECTION 3.05. Procedures for Indemnification - Third Party
Claims. If a claim or demand is made against an Indemnitee by any person who is
not a party to this Agreement (a "Third Party Claim") as to which such
Indemnitee is entitled to indemnification pursuant to this Agreement, such
Indemnitee shall notify the Indemnifying Party in writing, and in reasonable
detail, of the Third Party Claim promptly (and in any event within 15 business
days) after receipt by such Indemnitee of written notice of the Third Party
Claim; provided, however, that failure to give such notification shall not
affect the indemnification provided hereunder except to the extent the
Indemnifying Party shall have been actually prejudiced as a result of such
failure (except that the Indemnifying Party shall not be liable for any expenses
incurred during the period in which the Indemnitee failed to give such notice).

                  If a Third Party Claim is made against an Indemnitee, the
Indemnifying Party shall be entitled to participate in the defense thereof and,
in the case of an Indemnifying Party's obligation to indemnify the Indemnitee
pursuant to Section 3.01(a), Section 3.01(b), Section 3.02 or Section 3.03, if
the Indemnifying Party so chooses and acknowledges in writing its obligation to
indemnify the Indemnitee therefor, to assume the defense thereof with counsel
selected by the Indemnifying Party; provided, however, that such counsel is not
reasonably objected to by the Indemnitee. Should the Indemnifying Party so elect
to assume the defense of a Third Party Claim, the Indemnifying Party shall not
be liable to the Indemnitee for legal or other expenses subsequently incurred by
the Indemnitee in connection with the defense thereof. If the Indemnifying Party
assumes such defense, the Indemnitee shall have the right to participate in the
defense thereof and to employ counsel, at its own expense, separate from the
counsel employed by the Indemnifying Party, it being understood that the
Indemnifying Party shall control such defense. The Indemnifying Party shall be
liable for the fees and expenses of counsel employed by the Indemnitee for any
period during which the Indemnifying Party has failed to assume the defense
thereof. If the Indemnifying Party so elects to assume the defense of any Third
Party Claim, all of the Indemnitees shall cooperate with the Indemnifying Party
in the defense or prosecution thereof.

                  If the Indemnifying Party acknowledges in writing liability
for a Third Party Claim, then in no event will the Indemnitee admit any
liability with respect to, or settle, compromise or discharge, any Third Party
Claim without the Indemnifying Party's prior written consent, which consent
shall not be unreasonably withheld or delayed; provided, however, that the
Indemnitee shall have the right to settle, compromise or discharge such Third
Party Claim without the consent of the Indemnifying Party if the Indemnitee
releases the Indemnifying Party from its indemnification obligation hereunder
with respect to such Third Party Claim and such settlement, compromise or
discharge would not otherwise adversely affect the Indemnifying Party. If the
Indemnifying Party acknowledges in writing liability for a Third Party Claim,
the Indemnitee will agree to any settlement, compromise or discharge of a Third
Party Claim that the Indemnifying Party may recommend which by its terms (i)
obligates the Indemnifying Party to pay the full amount of its indemnification
obligation in connection with such Third Party Claim and (ii) releases the
Indemnitee completely in



<PAGE>


                                       24

connection with such Third Party Claim and which would not otherwise adversely
affect the Indemnitee; and provided further that the Indemnitee may refuse to
agree to any such proposed settlement, compromise or discharge if the Indemnitee
agrees that the Indemnifying Party's indemnification obligation with respect to
such Third Party Claim shall not exceed the amount that would be required to be
paid by or on behalf of the Indemnifying Party in connection with such proposed
settlement, compromise or discharge.

                  Notwithstanding the foregoing, the Indemnifying Party shall
not be entitled to assume the defense of any Third Party Claim (and shall be
liable for the fees and expenses of counsel incurred by the Indemnitee in
defending such Third Party Claim) if the Third Party Claim seeks an order,
injunction or other equitable relief or relief for other than money damages
against the Indemnitee which the Indemnitee reasonably determines, after
conferring with its counsel, cannot be separated from any related claim for
money damages. If such equitable relief or other relief portion of the Third
Party Claim can be so separated from that for money damages, the Indemnifying
Party shall be entitled to assume the defense of the portion relating to money
damages.

                  The provisions contained in Section 3.01(d) shall control in
the situations described particularly in that section.

                  SECTION 3.06. Survival of Indemnities. The obligations of
Corning, CCL and Covance under this Article III shall survive the sale or other
transfer by any of them of any assets or businesses, with respect to any
Indemnifiable Loss of any Indemnitee related to such assets or businesses.

                  SECTION 3.07.  Payments.  All payments under this Agreement 
shall be made without gross-up for Taxes except as provided in Section
3.01(d)(x).

                                   ARTICLE IV
                              ACCESS TO INFORMATION

                  SECTION 4.01. Provision of Corporate Records. From and after
the Distribution Date, upon the prior written request by Corning, CCL or Covance
for specific and identified agreements, documents, books, records or files
(collectively, "Records") relating to or affecting Corning, CCL or Covance, as
applicable, Corning, CCL or Covance, as the case may be, shall arrange, as soon
as reasonably practicable following the receipt of such request, for the
provision of appropriate copies of such Records (or other originals thereof if
the party making the request has a reasonable need for such originals) then in
the possession of Corning, CCL or Covance, as the case may be, or any of their
Subsidiaries, but only to the extent such items are not already in the
possession of the requesting party; provided, however, that nothing in this
Section 4.01 shall obligate a party to retain any records except to the extent
required by



<PAGE>


                                       25

law or by an Ancillary Agreement or to provide Records if the party reasonably
determines that such provision of Records would prevent it from claiming that
the Records were privileged or otherwise not subject to disclosure in any
Action.

                  SECTION 4.02. Access to Information. (a) From and after the
Distribution Date, each of Corning, CCL and Covance shall afford to the other
and its authorized accountants, counsel and other designated representatives
reasonable access during normal business hours, subject to appropriate
restrictions for classified, privileged or confidential information, to the
personnel, properties, books and records of such party and its Subsidiaries
insofar as such access is reasonably required by the other party.

                  (b) For a period of five years following the Distribution
Date, each of Corning, CCL and Covance shall provide to the other, promptly
following such time at which such documents shall be filed with the Commission,
all documents that shall be filed by it and by any of its respective
Subsidiaries with the Commission pursuant to the periodic and interim reporting
requirements of the Exchange Act, and the rules and regulations of the
Commission promulgated thereunder.

                  SECTION 4.03. Reimbursement. Except to the extent otherwise
contemplated by any Ancillary Agreement, a party providing Records or access to
information to the other party under this Article IV shall be entitled to
receive from the recipient, upon the presentation of invoices therefor, payments
for such amounts, relating to supplies, disbursement and other out-of-pocket
expenses, as may be reasonably incurred in providing such Records or access to
information.

                  SECTION 4.04. Confidentiality. (a) Each of (i) Corning and its
Subsidiaries, (ii) CCL and its Subsidiaries and (iii) Covance and its
Subsidiaries shall not use or permit the use of (without the prior written
consent of the other) and shall hold, and shall cause its directors, officers,
employees, agents, consultants and advisors to hold, in strict confidence, all
information concerning the other parties in its possession, its custody or under
its control (except to the extent that (x) such information has been in the
public domain through no fault of such party, (y) such information has been
later lawfully acquired from other sources by such party or (z) this Agreement,
any Ancillary Agreement or any other agreement entered into pursuant hereto
permits the use or disclosure of such information) to the extent such
information (i) was obtained prior to or relates to periods prior to the
Effective Time, (ii) relates to any Ancillary Agreement or (iii) is obtained in
the course of performing services for the other party pursuant to any Ancillary
Agreement, and each party shall not (without the prior written consent of the
other) otherwise release or disclose such information to any other person,
except such party's auditors and attorneys, unless compelled to disclose such
information by judicial or administrative process or unless such disclosure is
required by law and such party has used commercially reasonable efforts to
consult with the other affected party or parties prior to such disclosure.



<PAGE>


                                       26

                  (b) To the extent that a party hereto is compelled by judicial
or administrative process to disclose otherwise confidential information under
circumstances in which any evidentiary privilege would be available, such party
agrees to assert such privilege in good faith prior to making such disclosure.
Each of the parties hereto agrees to consult with each relevant other party in
connection with any such judicial or administrative process, including, without
limitation, in determining whether any privilege is available, and further
agrees to allow each such relevant party and its counsel to participate in any
hearing or other proceeding (including, without limitations, any appeal of an
initial order to disclose) in respect of such disclosure and assertion of
privilege.


                                    ARTICLE V
                               DISPUTE RESOLUTION

                  SECTION 5.01. Good Faith Negotiations. In the event of a
controversy, dispute or claim arising out of, in connection with, or in relation
to the interpretation, performance, nonperformance, validity or breach of this
Agreement or otherwise arising out of, or in any way related to this Agreement,
including, without limitation, any claim based on contract, tort or statute
(collectively, "Agreement Disputes"), the general counsels of the relevant
parties shall negotiate in good faith for a reasonable period of time to settle
such Agreement Dispute.

                  SECTION 5.02. Procedure. If after such reasonable period such
general counsels are unable to settle such Agreement Dispute (and in any event
after 60 days have elapsed from the time the relevant parties began such
negotiations), such Agreement Dispute shall be determined, at the request of any
relevant party, by arbitration conducted in New York City, before and in
accordance with the then-existing Rules for Commercial Arbitration of the
American Arbitration Association (the "Rules"), and any judgment or award
rendered by the arbitrator shall be final, binding and nonappealable (except
upon grounds specified in 9 U.S.C. ss. 10(a) as in effect on the date hereof),
and judgment may be entered by any state or federal court having jurisdiction
thereof in accordance with Section 6.16 hereof. Unless the arbitrator otherwise
determines, the pre-trial discovery of the then-existing Federal Rules of Civil
Procedure and the then-existing Rules 46 and 47 of the Civil Rules for the
United States District Court for the Southern District of New York shall apply
to any arbitration hereunder. Any controversy concerning whether an Agreement
Dispute is an arbitrable Agreement Dispute, whether arbitration has been waived,
whether an assignee of this Agreement is bound to arbitrate, or as to the
interpretation of enforceability of this Article V shall be determined by the
arbitrator. The arbitrator shall be a retired or former judge of any United
States District Court or Court of Appeals or such other qualified person as the
relevant parties may agree to designate, provided, however, such individual has
had substantial professional experience with regard to settling sophisticated
commercial disputes. The parties intend that the provisions to arbitrate set
forth herein be valid, enforceable and irrevocable. The designation of a situs
or a



<PAGE>


                                       27

governing law for this Agreement or the arbitration shall not be deemed an
election to preclude application of the Federal Arbitration Act, if it would be
applicable. In his or her award the arbitrator shall allocate, in his or her
discretion, among the parties to the arbitration all costs of the arbitration,
including, without limitation, the fees and expenses of the arbitrator and
reasonable attorneys' fees, costs and expert witness expenses of the parties.
The undersigned agree to comply with any award made in any such arbitration
proceedings that has become final in accordance with the Rules and agree to the
entry of a judgment in any jurisdiction upon any award rendered in such
proceedings becoming final under the Rules. The arbitrator shall be entitled if
appropriate, to award any remedy in such proceedings, including, without
limitation, monetary damages, specific performance and all other forms of legal
and equitable relief; provided, however, the arbitrator shall not be entitled to
award punitive damages.


                                   ARTICLE VI
                               GENERAL PROVISIONS

                  SECTION 6.01. Expenses. Except as otherwise set forth in this
Agreement or any Ancillary Agreement, each of Corning, CCL and Covance shall
bear its own costs and expenses incurred on or prior to the Distribution Date
(whether or not paid on or prior to the Distribution Date) in connection with
the preparation, execution, delivery and implementation of this Agreement and
any Ancillary Agreement, the Information Statement, the Registration Statements
and the Distributions and the consummation of the transactions contemplated
thereby and the parties to this Agreement shall agree on an equitable allocation
of costs and expenses where any item is not clearly allocable to Corning, CCL or
Covance. Except as otherwise set forth in this Agreement or any Ancillary
Agreement, each party shall bear its own costs and expenses incurred after the
Distribution Date.

                  SECTION 6.02.  Notices.  All notices, requests, claims,
demands and other communications hereunder shall be in writing and shall be
given or made (and shall be deemed to have been duly given or made upon receipt)
by delivery in person, by courier service, by cable, by telecopy, by telegram,
by telex or by registered or certified mail (postage prepaid, return receipt
requested) to the respective parties at the addresses (or at such other address
for a party as shall be specified in a notice given in accordance with this
Section 6.02) listed below (with copies to Shearman & Sterling at 599 Lexington
Avenue, New York, New York 10022, Attn: Creighton Condon):



<PAGE>


                                       28

         (a)      To Corning Incorporated:

                  One Riverfront Plaza
                  Corning, New York  14831
                  Telecopy:  (607) 974-8656

                  Attn:  General Counsel

         (b)      To CCL:

                  One Malcolm Avenue
                  Teterboro, New Jersey  07608
                  Telecopy:  (201) 462-4795

                  Attn:  General Counsel

         (c)      To Covance:

                  210 Carnegie Center
                  Princeton, New Jersey  08540-6233
                  Telecopy:  (609) 452-9865

                  Attn:  General Counsel

                  SECTION 6.03. Complete Agreement; Construction. This
Agreement, including the Exhibits and Schedules, and the Ancillary Agreements
shall constitute the entire agreement between the parties hereto with respect to
the subject matter hereof and shall supersede all prior agreements and
undertakings, both written and oral, between the parties with respect to the
subject matter hereof and thereof. In the event of any inconsistency between
this Agreement and any Schedule hereto, the Schedule shall prevail.
Notwithstanding any other provisions in this Agreement to the contrary, in the
event and to the extent that there shall be a conflict between the provisions of
this Agreement and the provisions of any Ancillary Agreement, such Ancillary
Agreement shall control.

                  SECTION 6.04.  Ancillary Agreements.  This Agreement is not 
intended to address, and should not be interpreted to address, the matters
specifically and expressly covered by the Ancillary Agreements.

                  SECTION 6.05. Counterparts. This Agreement may be executed in
one or more counterparts, and by the different parties hereto in separate
counterparts, each of which when executed shall be deemed to be an original but
all of which taken together shall constitute one and the same agreement.



<PAGE>


                                       29

                  SECTION 6.06. Survival of Agreements. Except as otherwise
contemplated by this Agreement, all covenants and agreements of the parties
contained in this Agreement shall survive the Distribution Date.

                  SECTION 6.07. Waiver. The parties to this Agreement may (a)
extend the time for the performance of any of the obligations or other acts of
the other party or parties, (b) waive any inaccuracies in the representations
and warranties of the other party or parties contained herein or in any document
delivered by the other party or parties pursuant hereto or (c) waive compliance
with any of the agreements or conditions of the other party or parties contained
herein. Any such extension or waiver shall be valid only if set forth in an
instrument in writing signed by the party to be bound thereby. Any waiver of any
term or condition shall not be construed as a waiver of any subsequent breach or
a subsequent waiver of the same term or condition, or a waiver of any other term
or condition, of this Agreement. The failure of any party to assert any of its
rights hereunder shall not constitute a waiver of any such rights.

                  SECTION 6.08. Amendments. Subject to the terms of Section 6.11
hereof, this Agreement may not be amended or modified except (a) by an
instrument in writing signed by, or on behalf of, the parties or (b) by a waiver
in accordance with Section 6.07.

                  SECTION 6.09. Assignment. This Agreement may not be assigned
by operation of law or otherwise without the express written consent of the
other parties (which consent may be granted or withheld in the sole discretion
of the parties), and any attempt to assign any rights or obligations arising
under this Agreement without such consent shall be void.

                  SECTION 6.10. Successors and Assigns. The provisions of this
Agreement shall be binding upon, inure to the benefit of and be enforceable by
the parties and their respective successors and permitted assigns.

                  SECTION 6.11. Termination. This Agreement (including, without
limitation, Article III hereof) may be terminated and the Distributions may be
amended, modified or abandoned at any time prior to the Distributions by and in
the sole discretion of Corning without the approval of CCL or Covance or the
shareholders of Corning. In the event of such termination, no party shall have
any liability of any kind to any other party or any other person. After the
Distributions, this Agreement may not be terminated except by an agreement in
writing signed by the parties; provided, however, that Article III shall not be
terminated or amended after the Distributions in respect of the third party
beneficiaries thereto without the consent of such persons.

                  SECTION 6.12.  Subsidiaries.  Each of the parties hereto 
shall cause to be performed, and hereby guarantees the performance of, all
actions, agreements and obligations



<PAGE>


                                       30

set forth herein to be performed by any Subsidiary of such party or by any
entity that is contemplated to be a Subsidiary of such party on and after the
Distribution Date.

                  SECTION 6.13. Third Party Beneficiaries. Except as provided in
Article III relating to Indemnitees, this Agreement shall be binding upon and
inure solely to the benefit of the parties hereto and their respective
Subsidiaries, Affiliates and assigns and nothing herein, express or implied, is
intended to or shall confer upon any third parties any legal or equitable right,
benefit or remedy of any nature whatsoever under or by reason of this Agreement.

                  SECTION 6.14. Headings. The descriptive headings contained 
in this Agreement are for convenience of reference only and shall not affect in
any way the meaning or interpretation of this Agreement.

                  SECTION 6.15. Specific Performance. The parties hereto agree
that irreparable damage would occur in the event any provision of this Agreement
was not performed in accordance with the terms hereof and that the parties shall
be entitled to specific performance of the terms hereof, in addition to any
other remedy at law or equity.

                  SECTION 6.16. Governing Law. This Agreement shall be governed
by, and construed in accordance with, the laws of the State of New York,
applicable to contracts executed in and to be performed entirely within that
state. Without limiting the provisions of Article V, all actions and proceedings
arising out of or relating to this Agreement shall be heard and determined in
any New York state or federal court sitting in the City of New York.

                  SECTION 6.17. Public Announcements. (a) Prior to the Effective
Time, neither CCL nor Covance shall make, or cause to be made, any press release
or public announcement in respect of this Agreement or the transactions
contemplated hereby or otherwise communicate with any news media without the
prior written consent of Corning.

                  (b) Following the Effective Time, no party to this Agreement
shall make, or cause to be made, any press release or public announcement in
respect of this Agreement or the transactions contemplated hereby or otherwise
communicate with any news media without prior consultation with the other
parties, and the parties shall cooperate as to the timing and contents of any
such press release or public announcement.

                  SECTION 6.18. Severability. If any term or other provision of
this Agreement is invalid, illegal or incapable of being enforced by any law or
public policy, all other terms and provisions of this Agreement shall
nevertheless remain in full force and effect so long as the economic or legal
substance of the transactions contemplated hereby is not affected in any manner
materially adverse to any party. Upon such determination that any term or other
provision is invalid, illegal or incapable of being enforced, the parties hereto
shall negotiate in good faith to modify this Agreement so as to effect the
original intent of the parties as closely



<PAGE>


                                       31

as possible in an acceptable manner in order that the transactions contemplated
hereby are consummated as originally contemplated to the greatest extent
possible.

                  IN WITNESS WHEREOF, the parties have caused this Agreement to
be executed as of the date first written above by their respective officers
thereunto duly authorized.


                                            CORNING INCORPORATED


                                             by________________________________
                                               Name:
                                               Title:


                                            CORNING LIFE SCIENCES INC.


                                             by_________________________________
                                                Name:
                                                Title:


                                            CORNING CLINICAL LABORATORIES INC.
                                            (Delaware)


                                            by__________________________________
                                              Name:
                                              Title:


                                            COVANCE INC.


                                            by__________________________________
                                               Name:
                                               Title:



                                            CORNING CLINICAL LABORATORIES INC.
                                            (Michigan)


                                            by__________________________________
                                               Name:
                                               Title:




<PAGE>


                                       32






This is the text of a common stock certificate as issued by Covance Inc. There
is a patterned background. There is a circular graphic image in the top center
of the page depicting a woman and two men who are holding a scale, a paper and
pen and a ruler??? There is a large globe in the foreground and a limitless
horizon behind the figures. There are patterned borders approximately 1-1/4
inches wide on either side of the page.

COVANCE logo                                                        COMMON STOCK
Covance Inc.                                                   CUSIP 219480 10 0
A DELAWARE CORPORATION                       SEE REVERSE FOR CERTAIN DEFINITIONS

NUMBER                                                                    SHARES
COV

   THIS CERTIFICATE IS TRANSFERABLE IN
    NEW YORK, N.Y. OR IN CHICAGO, IL.



This Certifies That



is the owner of


            FULLY PAID AND NON-ASSESSABLE SHARES OF THE COMMON STOCK
of Covance Inc. transferable on the books of the Corporation by the holder
hereof in person or by duly authorized attorney upon surrender of this
certificate properly endorsed. This certificate and the shares represented
hereby are issued and shall be held subject to all of the provisions of the
Restated Certificate of Incorporation of Covance Inc. and to any and all
amendments thereto, to all of which the holder by acceptance hereof assents.
This certificate is not valid until countersigned by the Transfer Agent and
registered by the Registrar.
    Witness the facsimile seal of the Corporation and the facsimile signatures
of its proper officers.

Dated:
                                  [SEAL]                
Countersigned and Registered:       of           /s/ Christopher A. Kuebler
HARRIS TRUST AND SAVINGS BANK   Covance Inc.     Chairman of the Board and
              Transfer Agent                       Chief Executive Officer
              and Registrar        1993

By                               Delaware        /s/ Jeffrey S. Hurwitz
                                                 Senior Vice President,
Authorized Signature                               General Counsel and Secretary

                               COLOR COPY       BANKNOTE CORPORATION OF AMERICA

<PAGE>

                                  Covance Inc.

     COVANCE INC. WILL FURNISH TO EACH STOCKHOLDER UPON REQUEST AND WITHOUT
CHARGE A FULL STATEMENT OF THE DESIGNATIONS, RELATIVE RIGHTS, PREFERENCES AND
LIMITATIONS WITH RESPECT TO THE CAPITAL STOCK OF THE CORPORATION AND OF THE
AUTHORITY OF THE BOARD OF DIRECTORS TO DIVIDE THE SHARES INTO CLASSES OR SERIES
AND TO DETERMINE AND CHANGE THE RELATIVE RIGHTS, PREFERENCES AND LIMITATIONS OF
ANY CLASS OR SERIES. SUCH REQUEST MAY BE MADE TO THE SECRETARY OF THE
CORPORATION, COVANCE INC., PRINCETON, NEW JERSEY 08540.

     This certificate also evidences and entitles the holder hereof to certain
Rights as set forth in the Rights Agreement between Covance Inc. and Harris
Trust and Savings Bank, as Rights Agent, dated as of December ___, 1996 (the
"Rights Agreement"), the terms of which are incorporated herein by reference and
a copy of which is on file at the principal executive offices of Covance Inc.
Under certain circumstances, as set forth in the Rights Agreement, such rights
will be evidenced by separate certifcate(s) and will no longer be evidenced by
this certificate. Covance Inc. will mail to the holder of this certificate a
copy of the Rights Agreement without charge after receipt of a written request
therefor. Under certain circumstances, as set forth in the Rights Agreement,
Rights issued to any Person who becomes an Acquiring Person (as defined in the
Rights Agreement) may become null and void.

                 _____________________________________________

     The following abbreviations, when used in the inscription on the face of
this certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

TEN COM - as tenants in common         UNIF GIFT MIN ACT -______Custodian_______
                                                          (Cust)         (Minor)
TEN ENT - as tenants by the entireties             under Uniform Gifts to Minors
                                                   Act _________________________
JT TEN  - as joint tenants with right                           (State)
          of survivorship and not as
          tenants in common

    Additional abbreviations may also be used though not in the above list.

For value received, _____ hereby sell, assign and transfer unto
PLEASE INSERT SOCIAL SECURITY NUMBER
OR OTHER IDENTIFYING NUMBER OF ASSIGNEE
_______________________________________
________________________________________________________________________________
  PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE.
________________________________________________________________________________
________________________________________________________________________________
______________________________________________________________________Shares
of the capital stock represented by the within Certificate, and do hereby
irrevocably constitute and appoint _____________________________________________
________________________________________________________________________________
Attorney to transfer the said stock on the books of the within-named
Corporation with full power of substitution in the premises.

Dated,__________

Signature(s) Guaranteed:
                                           _____________________________________
                                                        Signature


By                                         _____________________________________
                                                        Signature

THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR
INSTITUTION, (BANKS, STOCKHOLDERS, SAVINGS AND LOAN ASSOCIATIONS
AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE
GUARANTEE MEDALLION PROGRAM), PURSUANT TO S.E.C. RULE 17Ad-15.

NOTICE: THE SIGNATURE TO THIS ASSIGNMENT MUST CORRESPOND WITH THE NAME
AS WRITTEN UPON THE FACE OF THE CERTIFICATE IN EVERY PARTICULAR, WITHOUT
ALTERATION OR ENLARGEMENT OR ANY CHANGE WHATEVER.

            BANKNOTE CORPORATION OF AMERICA Wall St -- 1-610038-942
                         PROOF #2 - 11/11/96 - Covance







                                CREDIT AGREEMENT
                                      among
                                  COVANCE INC.
                                  as Borrower,
                                       AND
                      CERTAIN SUBSIDIARIES OF COVANCE INC.
                                 as Guarantors,
                                       AND
                         THE LENDERS IDENTIFIED HEREIN,
                                       AND
                               NATIONSBANK, N.A.,
                             as Administrative Agent
                                       AND
                         WACHOVIA BANK OF GEORGIA, N.A.,
                              as Syndication Agent
                          DATED AS OF NOVEMBER 26, 1996


                                        1

<PAGE>



                                TABLE OF CONTENTS



                                    SECTION 1

                        DEFINITIONS AND ACCOUNTING TERMS

<TABLE>

<S>        <C>                                                                    <C>

1.1        Definitions............................................................ 1
1.2        Computation of Time Periods and Other Definitional Provisions......... 23
1.3        Accounting Terms...................................................... 23

                                    SECTION 2

                                CREDIT FACILITIES

2.1        Revolving Loans....................................................... 23
2.2        Letter of Credit Subfacility.......................................... 26
2.3        Competitive Bid Loans Subfacility..................................... 31
2.4        Swing Line Loans Subfacility.......................................... 34
2.5        Currency Equivalents.................................................. 36

                                    SECTION 3

          GENERAL PROVISIONS APPLICABLE TO LOANS AND LETTERS OF CREDIT

3.1        Interest.............................................................. 36
3.2        Place and Manner of Payments.......................................... 36
3.3        Prepayments........................................................... 37
3.4        Fees.................................................................. 38
3.5        Payment in full at Maturity........................................... 39
3.6        Computations of Interest and Fees..................................... 39
3.7        Pro Rata Treatment.................................................... 40
3.8        Sharing of Payments................................................... 41
3.9        Capital Adequacy...................................................... 41
3.10       Inability To Determine Eurocurrency Rate or Make Loans in Foreign
           Currency.............................................................. 42
3.11       Illegality............................................................ 42
3.12       Requirements of Law................................................... 43
3.13       Taxes................................................................. 44
3.14       Compensation.......................................................... 47

                                    SECTION 4

                                    GUARANTY

4.1        Guaranty of Payment................................................... 48
4.2        Obligations Unconditional............................................. 48
4.3        Modifications......................................................... 49
4.4        Waiver of Rights...................................................... 49

                                        i

<PAGE>

4.5        Reinstatement......................................................... 49
4.6        Remedies.............................................................. 50
4.7        Limitation of Guaranty................................................ 50
4.8        Rights of Contribution................................................ 51

                                    SECTION 5

                              CONDITIONS PRECEDENT

5.1        Closing Conditions.................................................... 52
5.2        Conditions to All Extensions of Credit................................ 55

                                    SECTION 6

                         REPRESENTATIONS AND WARRANTIES

6.1        Financial Condition................................................... 56
6.2        No Material Change.................................................... 56
6.3        Organization and Good Standing........................................ 56
6.4        Due Authorization..................................................... 56
6.5        No Conflicts.......................................................... 56
6.6        Consents.............................................................. 57
6.7        Enforceable Obligations............................................... 57
6.8        No Default............................................................ 57
6.9        Liens................................................................. 57
6.10       Indebtedness.......................................................... 57
6.11       Litigation............................................................ 57
6.12       Taxes................................................................. 57
6.13       Compliance with Law................................................... 57
6.14       ERISA................................................................. 58
6.15       Subsidiaries.......................................................... 59
6.16       Use of Proceeds....................................................... 59
6.17       Government Regulation................................................. 59
6.18       Environmental Matters................................................. 60
6.19       Intellectual Property................................................. 61
6.20       Investments........................................................... 61
6.21       Disclosure............................................................ 61

                                    SECTION 7

                              AFFIRMATIVE COVENANTS

7.1        Information Covenants................................................. 60
7.2        Financial Covenants................................................... 63
7.3        Preservation of Existence and Franchises.............................. 64
7.4        Books and Records..................................................... 64
7.5        Compliance with Law................................................... 64
7.6        Payment of Taxes and Other Indebtedness............................... 64
7.7        Insurance............................................................. 64
7.8        Maintenance of Property............................................... 64
7.9        Performance of Obligations............................................ 65


                                       ii

<PAGE>

7.10       Use of Proceeds....................................................... 65
7.11       Audits/Inspections.................................................... 65
7.12       Additional Credit Parties............................................. 65
7.13       Spin-Off.............................................................. 66
7.14       Uncertificated Securities............................................. 66
7.15       Additional Guarantors or Additional Pledges of Stock.

                                    SECTION 8

                               NEGATIVE COVENANTS

8.1        Indebtedness.......................................................... 67
8.2        Liens................................................................. 68
8.3        Nature of Business.................................................... 68
8.4        Consolidation and Merger.............................................. 68
8.5        Sale or Lease of Assets............................................... 69
8.6        Sale Leasebacks....................................................... 69
8.7        Advances, Investments and Loans....................................... 69
8.8        Restricted Payments................................................... 69
8.9        Fiscal Year; Organizational Documents................................. 70

                                    SECTION 9

                                EVENTS OF DEFAULT

9.1        Events of Default..................................................... 70
9.2        Acceleration; Remedies................................................ 72
9.3        Allocation of Payments After Event of Default......................... 73

                                   SECTION 10

                                AGENCY PROVISIONS

10.1       Appointment........................................................... 74
10.2       Delegation of Duties.................................................. 75
10.3       Exculpatory Provisions................................................ 75
10.4       Reliance on Communications............................................ 75
10.5       Notice of Default..................................................... 76
10.6       Non-Reliance on Agents and Other Lenders.............................. 76
10.7       Indemnification....................................................... 77
10.8       Agents in Their Individual Capacity................................... 77
10.9       Successor Agent....................................................... 77

                                   SECTION 11

                                  MISCELLANEOUS

11.1       Notices............................................................... 78
11.2       Right of Set-Off...................................................... 78
11.3       Benefit of Agreement.................................................. 78
11.4       No Waiver; Remedies Cumulative........................................ 81


                                       iii

<PAGE>



11.5       Payment of Expenses; Indemnification.................................. 82
11.6       Amendments, Waivers and Consents...................................... 82
11.7       Counterparts.......................................................... 83
11.8       Headings.............................................................. 83
11.9       Defaulting Lender..................................................... 84
11.10      Survival.............................................................. 84
11.11      Governing Law......................................................... 84
11.12      Waiver of Jury Trial.................................................. 84
11.13      Time.................................................................. 84
11.14      Severability.......................................................... 84
11.15      Entirety.............................................................. 84
11.16      Binding Effect........................................................ 84
11.17      Confidentiality....................................................... 85

</TABLE>


                                       iv

<PAGE>


SCHEDULES


Schedule 1.1(a)   Revolving Commitment Percentages
Schedule 6.2               Material Adverse Effect
Schedule 6.10              Indebtedness
Schedule 6.11              Litigation
Schedule 6.14              ERISA
Schedule 6.15              Subsidiaries and Location of Facilities
Schedule 6.18              Environmental
Schedule 6.22              Location of Assets
Schedule 7.7               Insurance
Schedule 8.2               Liens
Schedule 8.7               Investments
Schedule 8.9               Organizational Documents
Schedule 11.1              Notices



EXHIBITS


Exhibit 2.1(b)             Form of Notice of Borrowing
Exhibit 2.1(e)             Form of Notice of Continuation/Conversion
Exhibit 2.1(g)             Form of Revolving Loan Note
Exhibit 2.3(b)             Form of Competitive Bid Loan Request
Exhibit 2.3(h)             Form of Competitive Bid Loan Note
Exhibit 2.4(b)             Form of Swing Line Loan Request
Exhibit 2.4(e)             Form of Swing Line Loan Note
Exhibit 7.1(c)             Form of Officer's Certificate
Exhibit 7.12               Form of Joinder Agreement
Exhibit 11.3               Form of Assignment Agreement



                                        v

<PAGE>


                                CREDIT AGREEMENT



         THIS CREDIT AGREEMENT (as amended, supplemented or otherwise modified
from time to time, this "Credit Agreement"), is entered into as of November 26,
1996 among COVANCE INC., a Delaware corporation ("Borrower"), certain of the
Borrower's Subsidiaries (individually a "Guarantor" and collectively the
"Guarantors"), the Lenders (as defined herein), NATIONSBANK, N.A., as
Administrative Agent for the Lenders and WACHOVIA BANK OF GEORGIA, N.A., as
Syndication Agent for the Lenders.

                                    RECITALS

         WHEREAS, Borrower wishes to enter into a $250 million revolving credit
facility; and

         WHEREAS, the Lenders party hereto have agreed to make the requested
revolving credit facility available to the Borrower on the terms and conditions
hereinafter set forth.

         NOW, THEREFORE, IN CONSIDERATION of the premises and other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto agree as follows:


                                    SECTION 1

                        DEFINITIONS AND ACCOUNTING TERMS

         1.1 Definitions. As used herein, the following terms shall have the
meanings herein specified unless the context otherwise requires. Defined terms
herein shall include in the singular number the plural and in the plural the
singular:

                  "Additional Credit Party" means, at any time, each Person that
         shall have executed a Joinder Agreement after the Closing Date and
         shall not have been released from its obligations as a Guarantor, as
         provided in Sections 7.12 and 7.15.

                  "Adjusted Eurocurrency Rate" means the Eurocurrency Rate plus
         the Applicable Percentage.

                  "Adjusted Leverage Ratio" means the ratio of (a) an amount
         equal to Funded Debt minus the obligations of Corning Bio, Inc. under
         the Corning Bio TROL to (b) EBITDA.

                  "Administrative Agent" means NationsBank, N.A. (or any
         successor thereto) or any successor administrative agent appointed
         pursuant to Section 10.9.

                  "Agents" mean the Administrative Agent and the Syndication
         Agent and any successors and assigns in such capacity.



                                        1

<PAGE>



                  "Affiliate" means, with respect to any Person, any other
         Person directly or indirectly controlling (including but not limited to
         all directors and officers of such Person), controlled by or under
         direct or indirect common control with such Person. A Person shall be
         deemed to control a corporation if such Person possesses, directly or
         indirectly, the power (i) to vote 10% or more of the securities having
         ordinary voting power for the election of directors of such corporation
         or (ii) to direct or cause direction of the management and policies of
         such corporation, whether through the ownership of voting securities,
         by contract or otherwise.

                  "Agency Services Address" means NationsBank, N.A.,
         NC1-001-15-04, 101 North Tryon Street, Charlotte, North Carolina 28255,
         Attn: Agency Services, or such other address as may be identified by
         written notice from the Administrative Agent to the Borrower.

                  "Applicable Percentage" means, subject to the penultimate
         paragraph of this definition, the appropriate applicable percentages
         corresponding to the Adjusted Leverage Ratio in effect as of the most
         recent Calculation Date as shown below:


<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------
                                         Long Term          Applicable         Applicable
                                         Unsecured        Percentage for       Percentage         Applicable
Pricing            Adjusted          Debt Rating of      Eurocurrency       for Letter of     Percentage for
 Level          Leverage Ratio          Borrower            Loans            Credit Fee       Facility Fees
<S>             <C>                  <C>                 <C>                 <C>              <C>  
   I            Less than or =         A- or better
                  1.0 to 1.0             from S&P            .17%               .17%               .08%
                                      A3 or better
                                       from Moody's

   II           Less than or =      BBB+ from S&P            .20%               .20%               .10%
              1.50 to 1.0 but      Baa1 from Moody's
               greater than
                 1.0 to 1.0         

  III         Less than or =        BBB from S&P             .25%               .25%              .125%
                2.0 to 1.0         Baa2 from Moody's
              but greater than
                1.50 to 1.0      

   IV         Less than or =       BBB- from S&P
              2.50 to 1.0 but      Baa3 from Moody's         .30%               .30%               .15%
               greater than
                2.0 to 1.0      


   V           Greater than        Lower than BBB-
                2.50 to 1.0           from S&P               .45%               .45%               .20%
                                   Lower than Baa3
                                     from Moody's
- ------------------------------------------------------------------------------------------------------------
</TABLE>

         Subject to the penultimate paragraph of this definition, the
Applicable Percentage for Eurocurrency Loans, the Letter of Credit Fee
and the Facility Fees shall, in each case, be determined and adjusted
quarterly on the date (each a "Calculation Date") five Business Days
after the date by which the Borrower is required to provide the
officer's certificate in accordance with the provisions of Section
7.1(c); provided that the initial Applicable Percentage for
Eurocurrency Loans, the Letter of Credit Fee and the Facility Fees
shall be based on Pricing Level III (as shown above) and shall remain
at Pricing Level III until the first Calculation Date subsequent to
March 31, 1997 and, thereafter, the Pricing Level shall be determined
by the then current Adjusted Leverage Ratio; and provided further that
if the Borrower fails to provide the officer's certificate required by
Section 7.1(c) on or before any Calculation Date subsequent to March
31, 1997, the Applicable Percentage for Revolving Loans, the Letter of
Credit Fee and the Facility Fees shall be based on Pricing Level V from


                                        2

<PAGE>



         such Calculation Date until such time that an appropriate officer's
         certificate is provided whereupon the Pricing Level shall be determined
         by the then current Adjusted Leverage Ratio. Each determination of the
         Applicable Percentage shall be effective from one Calculation Date
         until the next Calculation Date. Any adjustment in the Applicable
         Percentage shall be applicable to all existing Loans and Letters of
         Credit as well as any new Loans made or Letters of Credit issued.

                  At any time, the Borrower may, by written notice to the
         Administrative Agent, tie the definition of Applicable Percentage to
         the long term unsecured (non-credit enhanced) debt rating of the
         Borrower as determined by S&P and Moody's (if the Borrower has received
         a long term unsecured debt rating from both S&P and Moody's and
         irrespective of the then Adjusted Leverage Ratio); provided that such
         decision by the Borrower shall be permanent and irrevocable.
         Thereafter, the Applicable Percentage shall mean, at any time, the
         applicable percentage corresponding to the long term unsecured debt
         ratings of the Borrower, as shown above, as such ratings may change
         from time to time. If at any time the ratings provided by S&P and
         Moody's are split between two different pricing levels, the appropriate
         pricing level shall be based on the higher of the two ratings (i.e. the
         lowest pricing based on the ratings); provided that if the split
         between the two ratings is more than one pricing level then the
         appropriate pricing level shall be one level above the lowest rating
         (i.e. the pricing shall be based on the level that provides one level
         cheaper pricing than the highest pricing based on the ratings). If
         subsequent to the election by the Borrower to tie its pricing to its
         long term unsecured (non-credit enhanced) debt rating, the Borrower's
         long term unsecured debt is no longer rated by S&P and Moody's then
         Pricing Level V shall apply.

                  The Borrower shall promptly deliver to the Administrative
         Agent, at the address set forth on Schedule 11.1 and at the Agency
         Services Address, information regarding any change in its unsecured
         (non-credit enhanced) debt rating, as determined by S&P and Moody's
         that would change the existing Pricing Level pursuant to the preceding
         paragraph.

                  "Bankruptcy Code" means the Bankruptcy Code in Title 11 of the
         United States Code, as amended, modified, succeeded or replaced from
         time to time.

                  "Base Rate" means, for any day, the rate per annum (rounded
         upwards, if necessary, to the nearest whole multiple of 1/100 of 1%)
         equal to the greater of (a) the Federal Funds Rate in effect on such
         day plus 1/2 of 1% or (b) the Prime Rate in effect on such day. If for
         any reason the Administrative Agent shall have determined (which
         determination shall be conclusive absent manifest error) that it is
         unable after due inquiry to ascertain the Federal Funds Rate for any
         reason, including the inability or failure of the Administrative Agent
         to obtain sufficient quotations in accordance with the terms hereof,
         the Base Rate shall be determined without regard to clause (a) of the
         first sentence of this definition until the circumstances giving rise
         to such inability no longer exist. Any change in the Base Rate due to a
         change in the Prime Rate or the Federal Funds Rate shall be effective
         on the effective date of such change in the Prime Rate or the Federal
         Funds Rate, respectively.

                  "Base Rate Loan" means any Loan bearing interest at a rate
         determined by reference to the Base Rate.


                                        3

<PAGE>



                  "Benefits Plan" means each of (a) the Employee Stock Ownership
         Plan of the Borrower, (b) the Trust Deed of the Covance Inc. Employee
         Share Trust between the trustee and the Borrower, (c) the Stock
         Purchase Savings Plan of the Borrower restated as of December 31, 1996,
         (d) the Employee Stock Purchase Plan of the Borrower, (e) the Employee
         Equity Participation Program of the Borrower and (f) any other "pension
         plan" (as defined in Section 3(2) of ERISA) of the Borrower or trust
         created thereunder.

                  "Borrower" means Covance Inc., a Delaware corporation,
         together with any successors and permitted assigns.

                  "Borrower Obligations" means, without duplication, all of the
         obligations of the Borrower to the Lenders (including the Issuing
         Lender and NationsBank) and the Agents, whether for principal,
         interest, fees, LOC Obligations, indemnifications or otherwise whenever
         arising, under this Credit Agreement, the Notes, the Collateral
         Documents or any of the other Credit Documents to which the Borrower is
         a party, including, without limitation, any amounts that would have
         accrued but for the automatic stay under the Bankruptcy Code.

                  "Business Day" means any day other than a Saturday, a Sunday,
         a legal holiday or a day on which banking institutions are authorized
         or required by law or other governmental action to close in Charlotte,
         North Carolina or New York, New York; provided that in the case of
         Eurocurrency Loans, such day is also a day on which dealings between
         banks are carried on in U.S. dollar deposits in the London interbank
         market.

                  "Calculation Date" has the meaning set forth in the definition
         of Applicable Percentage.

                  "Capital Expenditures" means all expenditures of the Credit
         Parties and their Subsidiaries which, in accordance with GAAP, would be
         classified as capital expenditures, including, without limitation,
         Capital Leases.

                  "Capital Lease" means, as applied to any Person, any lease of
         any property (whether real, personal or mixed) by that Person as lessee
         which, in accordance with GAAP, is or should be accounted for as a
         capital lease on the balance sheet of that Person.

                  "Cash Equivalents" means (a) securities issued or directly and
         fully guaranteed or insured by the United States of America or any
         agency or instrumentality thereof (provided that the full faith and
         credit of the United States of America is pledged in support thereof)
         having maturities of not more than twelve months from the date of
         acquisition, (b) U.S. dollar denominated time and demand deposits and
         certificates of deposit of (i) any Lender, (ii) any domestic commercial
         bank having capital and surplus in excess of $500,000,000 or (iii) any
         bank whose short-term commercial paper rating from S&P is at least A-1
         or the equivalent thereof or from Moody's is at least P-1 or the
         equivalent thereof (any such bank being an "Approved Bank"), in each
         case with maturities of not more than 270 days from the date of
         acquisition, (c) commercial paper and variable or fixed rate notes
         issued by any Approved Bank (or by the parent company thereof) or any
         variable rate notes issued by, or


                                        4

<PAGE>



         guaranteed by, any domestic corporation rated A-1 (or the equivalent
         thereof) or better by S&P or P-1 (or the equivalent thereof) or better
         by Moody's and maturing within six months of the date of acquisition,
         (d) repurchase agreements with a bank or trust company (including any
         of the Lenders) or securities dealer having capital and surplus in
         excess of $500,000,000 for direct obligations issued by or fully
         guaranteed by the United States of America in which the Borrower shall
         have a perfected first priority security interest (subject to no other
         Liens) and having, on the date of purchase thereof, a fair market value
         of at least 100% of the amount of the repurchase obligations, (e)
         marketable direct obligations issued by any state of the United States
         of America or any political subdivision of any such state or any public
         instrumentality thereof maturing within one year from the date of
         acquisition thereof and, at the time of acquisition, rated A-1 (or the
         equivalent thereof) or better from S&P or rated P-1 (or the equivalent
         thereof) or better from Moody's, (f) Eurocurrency time deposits having
         a maturity of less than one year purchased from any Lender directly
         (whether or not such deposit is with such Lender or any other Lender
         hereunder) and (g) Investments, classified in accordance with GAAP as
         current assets, in money market investment programs registered under
         the Investment Company Act of 1940, as amended, which are administered
         by financial institutions having capital of at least $500,000,000 and
         the portfolios of which are limited to Investments of the character
         described in the foregoing subdivisions (a) through (g).

                  "Change of Control" means, at any time subsequent to the
         occurrence of the Spin-Off, the occurrence of the following event: any
         "person" or "group" (within the meaning of Section 13(d) or 14(d) of
         the Exchange Act) has become, directly or indirectly, the "beneficial
         owner" (as defined in Rules 13d-3 and 13d-5 under the Exchange Act,
         except that a Person shall be deemed to have "beneficial ownership" of
         all shares that any such Person has the right to acquire, whether such
         right is exercisable immediately or only after the passage of time), by
         way of merger, consolidation or otherwise, of 30% or more of the voting
         power of the Voting Stock of the Borrower on a fully-diluted basis,
         after giving effect to the conversion and exercise of all outstanding
         warrants, options and other securities of the Borrower (whether or not
         such securities are then currently convertible or exercisable);
         provided that none of the Benefit Plans shall be deemed to be a
         "beneficial owner" under this definition.

                  "Closing Date" means the date hereof.

                  "Code" means the Internal Revenue Code of 1986 and the rules
         and regulations promulgated thereunder, as amended, modified, succeeded
         or replaced from time to time.

                  "Collateral Assignment of Notes" means those certain
         Collateral Assignment of Notes, executed and delivered by the
         applicable Credit Parties in favor of the Administrative Agent, for the
         benefit of the Lenders, collaterally assigning promissory notes issued
         by any Non-Material Domestic Subsidiary to a Credit Party.

                  "Collateral Documents" means the Pledge Agreements and the
         Collateral Assignments of Notes.



                                        5

<PAGE>



                  "Commitments" means the commitment of each Lender with respect
         to the Revolving Committed Amount and the commitment of NationsBank
         with respect to the Swing Line Committed Amount.

                  "Competitive Bid" means an offer by a Lender to make a
         Competitive Bid Loan pursuant to the terms of Section 2.3.

                  "Competitive Bid Loan" means a loan made by a Lender in its
         discretion pursuant to the provisions of Section 2.3.

                  "Competitive Bid Loan Notes" means the promissory notes of the
         Borrower in favor of each of the Lenders evidencing the Competitive Bid
         Loans provided pursuant to Section 2.3, individually or collectively,
         as appropriate, as such promissory notes may be amended, modified,
         supplemented, extended, renewed or replaced from time to time and as
         evidenced in the form of Exhibit 2.3(h).

                  "Competitive Bid Loan Request" means a request by the Borrower
         for Competitive Bids substantially in the form of Exhibit 2.3(b).

                  "Competitive Bid Rate" means, as to any Competitive Bid made
         by a Lender in accordance with the provisions of Section 2.3, (a) in
         the case of a Eurocurrency Competitive Loan, the Eurocurrency Rate and
         (b) in the case of a Fixed Rate Competitive Loan the fixed rate of
         interest offered by the Lender making the Competitive Bid.

                  "Corning Bio TROL" means (a) that certain Lease Agreement (Tax
         Retention Operating Lease - Personal Property), dated as of June 30,
         1995 between NationsBanc Leasing Corporation of North Carolina and
         Corning Bio, Inc. (f/k/a Corning Biopro, Inc.), (b) that certain Lease
         Agreement (Tax Retention Operating Lease - Real Property) dated as of
         June 30, 1995 between NationsBanc Leasing Corporation and Corning Bio,
         Inc. (f/k/a Corning Biopro, Inc.) and all Operative Agreements (as
         defined in the above agreements) entered into in connection therewith,
         as such agreements may be amended, modified or supplemented from time
         to time and (c) without duplication, all agreements, instruments and
         documents pursuant to which any one or more of the Borrower and its
         Subsidiaries guaranty or otherwise support any obligations under any
         Corning Bio TROL described in (a) or (b) above.

                  "Credit Documents" means this Credit Agreement, the Notes, any
         Joinder Agreement, the Fee Letter, the Collateral Documents and all
         other related agreements and documents issued or delivered hereunder by
         (i) a Guarantor to guarantee the Borrower Obligations or to secure such
         guarantee or (ii) the Borrower or one of its Subsidiaries (other than a
         Guarantor) to secure the Borrower Obligations.

                  "Credit Parties" means the Borrower and the Guarantors and
         "Credit Party" means any one of them.



                                        6

<PAGE>



                  "Credit Party Obligations" means, without duplication, all of
         the obligations of the Credit Parties to the Lenders (including the
         Issuing Lender and NationsBank) and the Agents, whether for principal,
         interest, fees, LOC Obligations, indemnifications or otherwise whenever
         arising, under this Credit Agreement, the Notes, the Collateral
         Documents or any of the other Credit Documents to which the Borrower or
         any other Credit Party is a party, including, without limitation, any
         amounts that would have accrued but for the automatic stay under the
         Bankruptcy Code.

                  "Default" means any event, act or condition which with notice
         or lapse of time, or both, would constitute an Event of Default.

                  "Defaulting Lender" means, at any time, any Lender that: (a)
         has failed to make a Loan or purchase a Participation Interest required
         pursuant to the terms of this Credit Agreement (but only for so long as
         such Loan is not made or such Participation Interest is not purchased),
         (b) has failed to pay to the Agents or any Lender an amount owed by
         such Lender pursuant to the terms of this Credit Agreement (but only
         for so long as such amount has not been repaid) or (c) has been deemed
         insolvent or has become subject to a bankruptcy or insolvency
         proceeding or to a receiver, trustee or similar official.

                  "Disclosure Documents" means, collectively, as of any date,
         the Information Statement, the Offering Memorandum, the Credit
         Documents, the SEC Documents and other certificates or instruments
         provided to the Agents and the Lenders in connection with this Credit
         Agreement.

                  "Dollars" and "$" means dollars in lawful currency of the
         United States of America.

                  "Domestic Subsidiary" means each direct and indirect
         Subsidiary of the Borrower that (a) is domiciled, incorporated or
         organized under the laws of any State of the United States or the
         District of Columbia and (b) has at least 20% of its sales, earnings or
         assets (determined on a consolidated basis) located or derived from its
         operations in the United States of America.

                  "EBIT" means, for any period, with respect to the Borrower and
         its Subsidiaries on a consolidated basis, the sum of (a) Net Income for
         such period (excluding the effect of any extraordinary or other
         non-recurring gains or losses outside of the ordinary course of
         business), provided that for any fiscal quarter ending prior to
         December 31, 1997, Net Income shall not include the one time
         restructuring charge incurred in connection with the Spin-Off as long
         as such restructuring charge does not exceed $75,000,000 plus (b) an
         amount which, in the determination of Net Income for such period, has
         been deducted for (i) Interest Expense for such period and (ii) total
         Federal, state, foreign or other income taxes for such period, all as
         determined in accordance with GAAP.

                  "EBITDA" means, for any period, with respect to the Borrower
         and its Subsidiaries on a consolidated basis, an amount equal to (a)
         EBIT plus (b) an amount which, in the determination of Net Income for
         such period, has been deducted for all depreciation and amortization
         for such period, all as determined in accordance with GAAP.


                                        7

<PAGE>




                  "Effective Date" means the date, as specified by the
         Administrative Agent in writing, on which the conditions set forth in
         Section 5.1 shall have been fulfilled (or waived in the sole discretion
         of the Lenders).

                  "Eligible Assignee" means (a) a Lender; (b) an Affiliate or
         Subsidiary of a Lender; (c) a commercial bank organized under the laws
         of the United States, or any State thereof, and having a combined
         capital and surplus of at least $500,000,000; (d) a savings and loan
         association or savings bank organized under the laws of the United
         States, or any State thereof, and having a combined capital and surplus
         of at least $500,000,000; (e) a commercial bank organized under the
         laws of any other country that is a member of the OECD or has concluded
         special lending arrangements with the International Monetary Fund
         associated with its general arrangements to borrow or a political
         subdivision of any such country, and having a combined capital and
         surplus of at least $500,000,000, so long as such bank is acting
         through a branch or agency located in the United States; (f) a finance
         company, insurance company or other financial institution or fund
         (whether a corporation, partnership, trust or other entity) that is
         engaged in making, purchasing or otherwise investing in commercial
         loans in the ordinary course of its business and having a combined
         capital and surplus of at least $250,000,000; and (g) any other Person
         approved by the Agents and the Borrower.

                  "Environmental Claim" means any investigation, written notice,
         violation, written demand, written allegation, action, suit,
         injunction, judgment, order, consent decree, penalty, fine, lien,
         proceeding, or written claim whether administrative, judicial, or
         private in nature arising (a) pursuant to, or in connection with, an
         actual or alleged violation of, any Environmental Law, (b) in
         connection with any Hazardous Material, (c) from any assessment,
         abatement, removal, remedial, corrective, or other response action in
         connection with an Environmental Law or other order of a Governmental
         Authority or (d) from any actual or alleged damage, injury, threat, or
         harm to health, safety, natural resources, or the environment.

                  "Environmental Laws" means any current or future legal
         requirement of any Governmental Authority pertaining to (a) the
         protection of health, safety, and the indoor or outdoor environment,
         (b) the conservation, management, or use of natural resources and
         wildlife, (c) the protection or use of surface water and groundwater or
         (d) the management, manufacture, possession, presence, use, generation,
         transportation, treatment, storage, disposal, release, threatened
         release, abatement, removal, remediation or handling of, or exposure
         to, any hazardous or toxic substance or material or (e) pollution
         (including any release to land surface water and groundwater) and
         includes, without limitation, the Comprehensive Environmental Response,
         Compensation, and Liability Act of 1980, as amended by the Superfund
         Amendments and Reauthorization Act of 1986, 42 USC 9601 et seq., Solid
         Waste Disposal Act, as amended by the Resource Conservation and
         Recovery Act of 1976 and Hazardous and Solid Waste Amendment of 1984,
         42 USC 6901 et seq., Federal Water Pollution Control Act, as amended by
         the Clean Water Act of 1977, 33 USC 1251 et seq., Clean Air Act of
         1966, as amended, 42 USC 7401 et seq., Toxic Substances Control Act of
         1976, 15 USC 2601 et seq., Hazardous Materials Transportation Act, 49
         USC App.


                                        8

<PAGE>



         1801 et seq., Occupational Safety and Health Act of 1970, as amended,
         29 USC 651 et seq., Oil Pollution Act of 1990, 33 USC 2701 et seq.,
         Emergency Planning and Community Right- to-Know Act of 1986, 42 USC
         11001 et seq., National Environmental Policy Act of 1969, 42 USC 4321
         et seq., Safe Drinking Water Act of 1974, as amended, 42 USC 300(f) et
         seq., any analogous implementing or successor law, and any amendment,
         rule, regulation, order, or directive issued thereunder.

                  "ERISA" means the Employee Retirement Income Security Act of
         1974, as amended, and any successor statute thereto, as interpreted by
         the rules and regulations thereunder, all as the same may be in effect
         from time to time. References to sections of ERISA shall be construed
         also to refer to any successor sections.

                  "ERISA Affiliate" means (except as otherwise set forth herein)
         any Credit Party, or any of its Subsidiaries, which, together with any
         Credit Party, is treated as a single employer under Sections 414(b),
         (c), (m), or (o) of the Code.

                  "Eurocurrency Competitive Loan" means a Competitive Bid Loan
         bearing interest at a rate determined by reference to the Eurocurrency
         Rate.

                  "Eurocurrency Loan" means a Loan, other than a Eurocurrency
         Competitive Loan, bearing interest based at a rate determined by
         reference to the Eurocurrency Rate.

                   "Eurocurrency Rate" means, for the Interest Period for each
         Eurocurrency Loan comprising part of the same borrowing (including
         conversions, extensions and renewals), a per annum interest rate
         determined pursuant to the following formula:

                  Eurocurrency Rate =            London Interbank Offered Rate
                                            1 - Eurocurrency Reserve Percentage

                  "Eurocurrency Reserve Percentage" means for any day, that
         percentage (expressed as a decimal) which is in effect from time to
         time under Regulation D of the Board of Governors of the Federal
         Reserve System (or any successor), as such regulation may be amended
         from time to time or any successor regulation, as the maximum reserve
         requirement (including, without limitation, any basic, supplemental,
         emergency, special, or marginal reserves, if any) applicable with
         respect to Eurocurrency liabilities as that term is defined in
         Regulation D (or against any other category of liabilities that
         includes deposits by reference to which the interest rate of
         Eurocurrency Loans is determined), whether or not Lender has any
         Eurocurrency liabilities subject to such reserve requirement at that
         time. The Eurocurrency Rate shall be adjusted automatically on and as
         of the effective date of any change in the Eurocurrency Reserve
         Percentage.

                  "Event of Default" means any of the events or circumstances
         described in Section 9.1.



                                        9

<PAGE>



                  "Exchange Act" means the Securities Exchange Act of 1934, as
         amended, and the rules and regulations promulgated thereunder, as
         amended, modified, succeeded or replaced from time to time.

                  "Extension of Credit" means, as to any Lender, the making of a
         Loan by such Lender (or a participation therein by a Lender) or the
         issuance of, or participation in, a Letter of Credit by such Lender.

                  "Facility Fees" has the meaning set forth in Section 3.4.

                  "Federal Funds Rate" means for any day the rate per annum
         equal to the weighted average of the rates on overnight Federal funds
         transactions with members of the Federal Reserve System arranged by
         Federal funds brokers on such day, as published by the Federal Reserve
         Bank of New York on the Business Day next succeeding such day; provided
         that (a) if such day is not a Business Day, the Federal Funds Rate for
         such day shall be such rate on such transactions on the next preceding
         Business Day and (b) if no such rate is so published on such next
         preceding Business Day, the Federal Funds Rate for such day shall be
         the average rate quoted to the Administrative Agent on such day on such
         transactions as determined by the Administrative Agent.

                  "Fee Letter" means that certain letter agreement, dated as of
         September 30, 1996, between the Agents and the Borrower, as amended,
         modified, supplemented or replaced from time to time.

                  "First Tier Foreign Subsidiary" means, at any date of
         determination, each Foreign Subsidiary in which any one or more of the
         Borrower and its Domestic Subsidiaries owns more than 50%, in the
         aggregate, of the Voting Stock of such Foreign Subsidiary.

                  "Fixed Charge Coverage Ratio" means the ratio of (a) an amount
         equal to the sum of EBIT plus Rent Expense to (b) an amount equal to
         the sum of Interest Expense plus Rent Expense.

                  "Fixed Rate" has the meaning set forth in Section 2.3(c).

                  "Fixed Rate Competitive Loan" means a Competitive Bid Loan
         designated as a Fixed Rate Competitive Loan in accordance with Section
         2.3.

                  "Foreign Currency" means British Pounds Sterling, Swiss
         Francs, German Marks and Japanese Yen or such other currency as agreed
         to between the Borrower and all the Lenders. Each Foreign Currency must
         be one (a) that is freely transferable and convertible into Dollars and
         (b) in which deposits are generally available to the Lenders in the
         London interbank market.

                  "Foreign Subsidiaries" means all Subsidiaries of the Borrower
         that are not Domestic Subsidiaries.



                                       10

<PAGE>



                  "Funded Debt" means, without duplication, the sum of (a) all
         Indebtedness of the Credit Parties and their Subsidiaries for borrowed
         money, (b) all purchase money Indebtedness of the Credit Parties and
         their Subsidiaries, (c) the principal portion of all obligations of the
         Credit Parties and their Subsidiaries under Capital Leases, (d) all
         obligations, contingent or otherwise, relative to the face amount of
         all letters of credit (other than letters of credit supporting trade
         payables in the ordinary course of business), whether or not drawn, and
         banker's acceptances issued for the account of such Person (it being
         understood that, to the extent an undrawn letter of credit supports
         another obligation consisting of Indebtedness, in calculating
         aggregated Indebtedness only such other obligation shall be included),
         (e) all Guaranty Obligations of the Credit Parties and their
         Subsidiaries with respect to Funded Debt of another Person, (f) all
         Funded Debt of another entity secured by a Lien on any property of the
         Credit Parties and their Subsidiaries whether or not such Funded Debt
         has been assumed by a Credit Party or any of its Subsidiaries, (g) all
         Funded Debt of any partnership or unincorporated joint venture to the
         extent a Credit Party or one of its Subsidiaries is legally obligated,
         net of any assets of such partnership or joint venture and (h) the
         principal balance outstanding under any synthetic lease, tax retention
         operating lease, off-balance sheet loan or similar off-balance sheet
         financing product where such transaction is considered borrowed money
         indebtedness for tax purposes but is classified as an operating lease
         in accordance with GAAP.

                  "GAAP" means generally accepted accounting principles in the
         United States applied on a consistent basis and subject to Section 1.3.

                  "Governmental Authority" means any Federal, state, local,
         provincial or foreign court or governmental agency, authority,
         instrumentality or regulatory body.

                  "Guarantor" means at any time, (a) each of the parties to this
         Credit Agreement listed as "Guarantors" on the signature pages hereof
         which are the only Material Domestic Subsidiaries as of the Closing
         Date and (b) each other Person that is an Additional Credit Party, in
         each case, together with their successors and assigns, but excluding
         any such Person that shall have been released from its guaranty
         obligations pursuant to Section 7.12 or 7.15.

                  "Guaranty Obligations" means, with respect to any Person,
         without duplication, any obligations (other than endorsements in the
         ordinary course of business of negotiable instru ments for deposit or
         collection) guaranteeing any Indebtedness of any other Person in any
         manner, whether direct or indirect, and including without limitation
         any obligation, whether or not contingent, (a) to purchase any such
         Indebtedness or other obligation or any property constituting security
         therefor, (b) to advance or provide funds or other support for the
         payment or purchase of such Indebtedness or to maintain working capital
         or solvency of such other Person (including, without limitation,
         maintenance agreements, comfort letters, take or pay arrangements, put
         agreements or similar agreements or arrangements but excluding any
         comfort letters, letters of awareness or similar agreements or
         arrangements to the extent such Person is not legally obligated
         thereunder) for the benefit of the holder of Indebtedness of such other
         Person, (c) to lease or purchase property, securities or services
         primarily for the purpose of assuring the owner of such Indebtedness or
         (d) to otherwise assure or hold harmless the owner of such Indebtedness
         or obligation against loss in respect thereof. The


                                       11

<PAGE>



         amount of any Guaranty Obligation hereunder shall (subject to any
         limitations set forth therein) be deemed to be an amount equal to the
         outstanding principal amount (or maximum principal amount, if larger)
         of the Indebtedness in respect of which such Guaranty Obligation is
         made.

                  "Hazardous Materials" means any substance, material or waste
         defined or regulated in or under any applicable Environmental Laws.

                  "Indebtedness" of any Person means, without duplication, (a)
         all obligations of such Person for borrowed money, (b) all obligations
         of such Person evidenced by bonds, debentures, notes or similar
         instruments, or upon which interest payments are customarily made, (c)
         all obligations of such Person under conditional sale or other title
         retention agreements relating to property purchased by such Person to
         the extent of the value of such property (other than customary
         reservations or retentions of title under agreements with suppliers
         entered into in the ordinary course of business), (d) all obligations,
         other than intercompany items, of such Person issued or assumed as the
         deferred purchase price of property or services purchased by such
         Person which would appear as liabilities on a balance sheet of such
         Person, (e) all Indebtedness of others secured by any Lien on property
         or assets owned by such Person, (f) all Guaranty Obligations of such
         Person, (g) the principal portion of all obligations of such Person
         under (i) Capital Leases and (ii) any synthetic lease, tax retention
         operating lease, off-balance sheet loan or similar off-balance sheet
         financing product of such Person where such transaction is considered
         borrowed money indebtedness for tax purposes but is classified as an
         operating lease in accordance with GAAP, (h) the maximum amount of all
         performance and standby letters of credit issued or bankers'
         acceptances facilities created for the account of such Person and,
         without duplication, all drafts drawn thereunder (to the extent
         unreimbursed), (i) the payment obligations required by such Person to
         be made, prior to the Revolving Loan Maturity Date, for mandatory
         redemption or mandatory sinking fund payments under any preferred stock
         issued by such Person and (j) the aggregate amount of uncollected
         accounts receivable of such Person subject at such time to a sale of
         receivables (or similar transaction) regardless of whether such
         transaction is effected without recourse to such Person or in a manner
         that would not be reflected on the balance sheet of such Person in
         accordance with GAAP. The Indebtedness of any Person shall include the
         Indebtedness of any partnership or unincorporated joint venture in
         which such Person is legally obligated or has a reasonable expectation
         of being liable with respect thereto.

                  "Information Statement" means the information memorandum dated
         September 20, 1996 delivered in connection with the distribution of the
         common stock of Corning Clinical Laboratories Inc. and Corning
         Pharmaceutical Services Inc., as such memorandum may be amended,
         supplemented or otherwise modified from time to time on or before the
         Effective Date.

                  "Interest Expense" means, for any period, with respect to the
         Credit Parties and their Subsidiaries on a consolidated basis, all
         interest expense (net of interest income), including the interest
         component under Capital Leases, as determined in accordance with GAAP.



                                       12

<PAGE>



                  "Interest Payment Date" means (a) as to Base Rate Loans, the
         first Business Day of each fiscal quarter of the Borrower, the date on
         which a Base Rate Loan is converted to a Eurocurrency Loan and the
         Revolving Loan Maturity Date, (b) as to Eurocurrency Loans, the last
         day of each applicable Interest Period, the Revolving Loan Maturity
         Date and, where the applicable Interest Period for a Eurocurrency Loan
         is greater than three months, the date three months from the beginning
         of the Interest Period and each three months thereafter and (c) as to
         Competitive Bid Loans and Quoted Rate Swing Line Loans, the last day of
         the Interest Period applicable to such Loan and the Revolving Loan
         Maturity Date; provided that if the Interest Period for a Competitive
         Bid Loan or a Quoted Rate Swing Line Loan is greater than 90 days then
         also on the first Business Day of each fiscal quarter of the Borrower.

                  "Interest Period" means, (a) as to Eurocurrency Loans, a
         period of one, two, three or six months' duration, as the Borrower may
         elect, commencing, in each case, on the date of the borrowing
         (including continuations and conversions thereof) and (b) with respect
         to Competitive Bid Loans and Quoted Rate Swing Line Loans, a period
         beginning on the date of such Loan and ending on the date specified in
         the applicable Competitive Bid Loan Request or Swing Line Loan Request;
         provided, however, (i) if any Interest Period would end on a day which
         is not a Business Day, such Interest Period shall be extended to the
         next succeeding Business Day (except, with respect to Eurocurrency
         Loans, that where the next succeeding Business Day falls in the next
         succeeding calendar month, then on the next preceding Business Day),
         (ii) no Interest Period shall extend beyond the Revolving Loan Maturity
         Date, (ii) with respect to Eurocurrency Loans, where an Interest Period
         begins on a day for which there is no numerically corresponding day in
         the calendar month in which the Interest Period is to end, such
         Interest Period shall end on the last Business Day of such calendar
         month and (iv) no Interest Period for a Competitive Bid Loan shall
         exceed 180 days.

                  "Investment" in any Person means (a) the acquisition (whether
         for cash, property, services, assumption of Indebtedness, securities or
         otherwise) of assets, shares of capital stock, bonds, notes,
         debentures, partnership, joint ventures or other ownership interests or
         other securities of such other Person or (b) any deposit with, or
         advance, loan or other extension of credit to, such Person (other than
         deposits made in connection with the purchase of equipment or other
         assets in the ordinary course of business) or (c) any other capital
         contribution to or investment in such Person, including, without
         limitation, any Guaranty Obligation (including any support for a Letter
         of Credit issued on behalf of such Person) incurred for the benefit of
         such Person.

                  "Issuing Lender" means NationsBank, N.A. or any successor
         thereto.

                  "Issuing Lender Fees" has the meaning set forth in Section
         3.4(b).

                  "Joinder Agreement" means a Joinder Agreement substantially in
         the form of Exhibit 7.12, as such Joinder Agreement may be amended,
         modified or supplemented from time to time.



                                       13

<PAGE>



                  "Lender" means any of the Persons identified as a "Lender" on
         the signature pages hereto, and any Person which may become a Lender by
         way of assignment in accordance with the terms hereof, together with
         their successors and permitted assigns.

                  "Letter of Credit" means a Letter of Credit issued for the
         account of a Credit Party by the Issuing Lender pursuant to Section
         2.2, as such Letter of Credit may be amended, modified, extended,
         renewed or replaced.

                  "Letter of Credit Fee" shall have the meaning assigned to such
         term in Section 3.4(b).

                  "Leverage Ratio" means the ratio of (a) Funded Debt to (b)
         EBITDA.

                  "Lien" means any mortgage, pledge, hypothecation, security
         interest, encumbrance or lien (statutory or otherwise) including,
         without limitation, the rights of a vendor or lessor under any
         conditional sale or title retention agreement or any lease
         substantially equivalent thereto.

                  "Loan" or "Loans" means the Revolving Loans, the Swing Line
         Loans and the Competitive Bid Loans, individually or collectively, as
         appropriate.

                  "LOC Committed Amount" means Twenty Five Million Dollars
         ($25,000,000).

                  "LOC Documents" means, with respect to any Letter of Credit,
         such Letter of Credit, any amendments thereto, any documents delivered
         in connection therewith, any application therefor, and any agreements,
         instruments, guarantees or other documents (whether general in
         application or applicable only to such Letter of Credit) governing or
         providing for (a) the rights and obligations of the parties concerned
         or at risk or (b) any collateral security for such obligations.

                  "LOC Obligations" means, at any time, the sum of (a) the
         maximum amount which is, or at any time thereafter may become,
         available to be drawn under Letters of Credit then outstanding,
         assuming compliance with all requirements for drawings referred to in
         such Letters of Credit plus (b) the aggregate amount of all drawings
         under Letters of Credit honored by an Issuing Lender but not
         theretofore reimbursed.

                  "LOC Participants" means the Lenders.

                  "London Interbank Offered Rate" means, with respect to any
         Eurocurrency Loan for the Interest Period applicable thereto, the rate
         of interest per annum (rounded upwards, if necessary, to the nearest
         1/100 of 1%) appearing on Telerate Page 3750 (or any successor page) as
         the London interbank offered rate for deposits in Dollars (or the
         applicable Foreign Currency) at approximately 11:00 A.M. (London time)
         two Business Days prior to the first day of such Interest Period for a
         term comparable to such Interest Period; provided, however, if more
         than one rate is specified on Telerate Page 3750, the applicable rate
         shall be the arithmetic mean of all such rates. If, for any reason,
         such rate is not available, the term "London Interbank Offered Rate"
         shall mean, with respect to any Eurocurrency Loan for the


                                       14

<PAGE>



         Interest Period applicable thereto, the rate of interest per annum
         (rounded upwards, if necessary, to the nearest 1/100 of 1%) appearing
         on Reuters Screen LIBO Page as the London interbank offered rate for
         deposits in Dollars at approximately 11:00 A.M. (London time) two
         Business Days prior to the first day of such Interest Period for a term
         comparable to such Interest Period; provided, however, if more than one
         rate is specified on Reuters Screen LIBO Page, the applicable rate
         shall be the arithmetic mean of all such rates.

                  "Mandatory Borrowing" has the meaning set forth in Section
         2.2(e).

                  "Material Adverse Effect" means a material adverse effect
         (after giving effect to any insurance proceeds or indemnification
         payments under existing insurance policies or agreements as long as the
         obligor under such policies or agreements is financially solvent and
         has acknowledged coverage) on (a) the results of operations or
         financial condition of the Borrower and its Subsidiaries taken as a
         whole, (b) the ability of a Credit Party to perform its respective
         obligations under this Credit Agreement or any of the other Credit
         Documents, or (c) the validity or enforceability of this Credit
         Agreement, any of the other Credit Documents, or the rights and
         remedies of the Lenders hereunder or thereunder taken as a whole;
         provided, however, that none of the following shall constitute a
         Material Adverse Effect: (i) the execution, delivery and performance of
         the Credit Documents, (ii) the Spin- Off and consummation of any one or
         more of the contemplated transactions related to the Spin-Off, as
         disclosed in the Information Statement, and (iii) the execution and
         delivery, in and of themselves, of the Transaction Agreement, the Tax
         Indemnity Agreements or the Tax Sharing Agreement.

                  "Material Domestic Subsidiary" means any Domestic Subsidiary
         of the Borrower that is also a Material Subsidiary.

                  "Material First Tier Foreign Subsidiary" mean a First Tier
         Foreign Subsidiary that is also a Material Subsidiary.

                  "Material Subsidiary" means, as of any date of determination,
         any Domestic Subsidiary or any Foreign Subsidiary that, together with
         its Subsidiaries on a consolidated basis, owns assets (excluding assets
         that pursuant to GAAP principles of consolidation would be eliminated
         from the consolidated balance sheet of the Borrower as of such date)
         equal to at least five percent (5%) of the total assets of the Borrower
         and its Subsidiaries on a consolidated basis; provided that neither
         Covance Health Economics Outcome Services Inc. (f/k/a Corning HTA,
         Inc.) nor any of its Subsidiaries shall not be deemed to be a Material
         Subsidiary.

                  "Moody's" means Moody's Investors Service, Inc., or any
         successor or assignee of the business of such company in the business
         of rating securities.

                  "Multiemployer Plan" means a Plan covered by Title IV of ERISA
         which is a multiemployer plan as defined in Section 3(37) or 4001(a)(3)
         of ERISA.



                                       15

<PAGE>



                  "Multiple Employer Plan" means a Plan covered by Title IV of
         ERISA, other than a Multiemployer Plan, which any Credit Party or any
         of its Subsidiaries or any ERISA Affiliate and at least one employer
         other than a Credit Party or any of its Subsidiaries or any ERISA
         Affiliate are contributing sponsors.

                  "NationsBank" means NationsBank, N.A. (or any successor
         thereto).

                  "Net Income" means, for any period, the net income after taxes
         for such period of the Credit Parties and their Subsidiaries on a
         consolidated basis, as determined in accordance with GAAP.

                  "Non-Excluded Taxes" has the meaning set forth in Section
         3.13.

                  "Non-Material Domestic Subsidiaries" means all Domestic
         Subsidiaries that are not Material Domestic Subsidiaries.

                  "Note" or "Notes" means the Revolving Loan Notes, the
         Competitive Bid Loan Notes and the Swing Line Loan Notes, individually
         or collectively, as appropriate.

                  "Notice of Borrowing" means a request by the Borrower for a
         Revolving Loan, substantially in the form of Exhibit 2.1(b).

                  "Notice of Continuation/Conversion" means a request by the
         Borrower to continue an existing Eurocurrency Loan to a new Interest
         Period or to convert a Eurocurrency Loan to a Base Rate Loan or a Base
         Rate Loan to a Eurocurrency Loan, substantially in the form of Exhibit
         2.1(e).

                  "Offering Memorandum" means the offering memorandum dated
         October, 1996 delivered by the Administrative Agents to the Lenders, as
         amended, supplemented or otherwise modified by the Information
         Statement, and as it may be further amended, supplemented or otherwise
         modified from time to time on or prior to the Effective Date.

                  "Operating Lease" means, as to any Person, any lease of any
         property (whether real, personal or mixed) by that Person as lessee
         which, in accordance with GAAP, is or should be accounted for as an
         operating lease.

                  "Participation Interest" means the Extension of Credit by a
         Lender by way of a purchase of a participation in Letters of Credit or
         LOC Obligations as provided in Section 2.2 or in any Loans as provided
         in Section 3.8.

                  "PBGC" means the Pension Benefit Guaranty Corporation
         established pursuant to Subtitle A of Title IV of ERISA and any
         successor thereto.

                  "Permitted Acquisition" means the acquisition of (a) all of
         the capital stock of another Person or (b) all or substantially all of
         the assets of another Person; provided that (i) to the extent any such
         acquisition is paid for in cash or through deferred payments or through
         the


                                       16

<PAGE>



         assumption of debt, any such acquisition shall not exceed $100,000,000
         and (ii) after giving effect to any such acquisition (A) the Credit
         Parties and their Subsidiaries are in compliance with all the financial
         covenants set forth in Section 7.2 and the use of proceeds covenant in
         Section 7.10 and (B) no Default or Event of Default exists and is
         continuing.

                  "Permitted Investments" means Investments which are (a) cash
         or Cash Equivalents, (b) accounts receivable created, acquired or made
         in the ordinary course of business and payable or dischargeable in
         accordance with customary trade terms, (c) inventory, raw materials and
         general intangibles (to the extent such general intangible is not a
         Capital Expenditure) acquired in the ordinary course of business, (d)
         Investments in the Borrower or a Subsidiary of the Borrower, (e) loans
         to directors, officers or employees in the ordinary course of business
         for reasonable business expenses, not to exceed in the aggregate
         $5,000,000 at any one time, (f) the investments existing on the date
         hereof, as set forth on Schedule 8.7, (g) Investments in Capital
         Expenditures, (h) Investments in Permitted Acquisitions, (i)
         Investments in joint ventures (other than joint ventures which are
         Subsidiaries of the Borrower), in the aggregate, not to exceed
         $10,000,000 at any one time, (j) as long as no Default or Event of
         Default exists and is continuing. Investments, if any, pursuant to (A)
         the Benefits Plans of the type referred to in subsection (a) and (b) of
         the definition of "Benefit Plans", (B) the Benefits Plans of the type
         referred to in subsections (c), (d), (e) and (f) of the definition of
         "Benefits Plans" in an aggregate amount not to exceed $50,000,000
         during the term of this Credit Agreement and (C) the Rights Plan in an
         aggregate amount not to exceed $2,000,000, and (k) received as
         consideration in connection with an asset sale permitted pursuant to
         Section 8.5.

                  "Permitted Liens" means (a) Liens securing Credit Party
         Obligations, if any (b) Liens for taxes not yet due or Liens for taxes
         being contested in good faith by appropriate proceedings for which
         adequate reserves determined in accordance with GAAP have been
         established (and as to which the property subject to any such Lien is
         not yet subject to foreclosure, sale or loss on account thereof), (c)
         Liens in respect of property imposed by law arising in the ordinary
         course of business such as materialmen's, mechanics', warehousemen's,
         carrier's, landlords' and other nonconsensual statutory Liens which are
         not past due more than 30 days or which are being contested in good
         faith by appropriate proceedings for which adequate reserves determined
         in accordance with GAAP have been established (and as to which the
         property subject to any such Lien is not yet subject to foreclosure,
         sale or loss on account thereof), (d) pledges or deposits made in the
         ordinary course of business to secure payment of worker's compensation
         insurance, unemployment insurance, pensions or social security
         programs, (e) Liens arising from good faith deposits in connection with
         or to secure performance of tenders, bids, leases, government
         contracts, performance and return-of-money bonds and other similar
         obligations incurred in the ordinary course of business (other than
         obligations in respect of the payment of borrowed money), (f) Liens
         arising from good faith deposits in connection with or to secure
         performance of statutory obligations and surety and appeal bonds, (g)
         easements, rights-of-way, restrictions (including zoning restrictions),
         matters of plat, minor defects or irregularities in title and other
         similar charges or encumbrances not, in any material respect, impairing
         the use of the encumbered property for its intended purposes, (h)
         judgment Liens that would not otherwise constitute an Event of Default
         and any other judgment Lien unless


                                       17

<PAGE>



         not discharged within sixty days of entry, pending appeal, or within
         sixty days after expiration of stay, (i) Liens in connection with
         Indebtedness allowed under Section 8.1(d), (j) Liens arising by virtue
         of any statutory or common law provision relating to banker's liens,
         rights of setoff or similar rights as to deposit accounts or other
         funds maintained with a creditor depository institution, (k) liens on
         leased equipment or under conditional sale or other title retention
         agreements, (l) leases or subleases granted to others not interfering
         in any material respect with the business of the Borrower or any of its
         Subsidiaries, (m) liens in favor of customs and revenue authorities as
         a matter of law to secure payment of customs duties, (n) liens securing
         surety bonds in an aggregate amount not to exceed $5,000,000, (o) liens
         securing appeal bonds covering assets less than or equal to
         $20,000,000, (p) Liens existing on the date hereof and identified on
         Schedule 8.2; provided that no such Lien shall extend to any property
         other than the property subject thereto on the Closing Date, (q) Liens
         securing any Corning Bio TROL and (r) Liens on the Voting Stock and
         other capital stock of any First Tier Foreign Subsidiary to the extent
         not pledged to the Administrative Agent pursuant to Section 7.12 and
         7.15.

                  "Person" means any individual, partnership, joint venture,
         firm, corporation, limited liability company, association, trust or
         other enterprise (whether or not incorporated), or any Governmental
         Authority.

                  "Plan" means any employee benefit plan (as defined in Section
         3(3) of ERISA) which is covered by ERISA and with respect to which any
         Credit Party or any of its Subsidiaries or any ERISA Affiliate is (or,
         if such plan were terminated at such time, would under Section 4069 of
         ERISA be deemed to be) an "employer" within the meaning of Section 3(5)
         of ERISA.

                  "Pledge Agreements" means those certain Pledge Agreements
         executed and delivered by the applicable Credit Parties in favor of the
         Administrative Agent, for the benefit of the Lenders, pledging 65% of
         the capital stock of the Material First Tier Foreign Subsidiaries and
         such other First Tier Foreign Subsidiaries as required by Section 7.15,
         as they may be amended, modified, extended, renewed or replaced from
         time to time.

                  "Prime Rate" means the per annum rate of interest established
         from time to time by the Administrative Agent at its principal office
         in Charlotte, North Carolina (or such other principal office of the
         Administrative Agent as communicated in writing to the Borrower and the
         Lenders) as its Prime Rate. Any change in the interest rate resulting
         from a change in the Prime Rate shall become effective as of 12:01 a.m.
         of the Business Day on which each change in the Prime Rate is announced
         by the Administrative Agent. The Prime Rate is a reference rate used by
         the Administrative Agent in determining interest rates on certain loans
         and is not intended to be the lowest rate of interest charged on any
         extension of credit to any debtor.

                  "Quoted Rate" has the meaning set forth in Section 2.4.

                  "Quoted Rate Swing Line Loan" means a Swing Line Loan made
         with a Quoted Rate.



                                       18

<PAGE>



                  "Real Properties" has the meaning specified in Section 6.18.

                  "Regulation D, G, U, or X" means Regulation D, G, U or X,
         respectively, of the Board of Governors of the Federal Reserve System
         as from time to time in effect and any successor to all or a portion
         thereof.

                  "Rent Expense" means, for any period, with respect to the
         Credit Parties and their Subsidiaries on a consolidated basis, all rent
         payable under Operating Leases, as determined in accordance with GAAP.

                  "Reportable Event" means a "reportable event" as defined in
         Section 4043 of ERISA with respect to which the notice requirements to
         the PBGC have not been waived.

                  "Required Lenders" means Lenders whose aggregate Credit
         Exposure (as hereinafter defined) constitutes more than 50% of the
         Credit Exposure of all Lenders at such time; provided, however, that if
         any Lender shall be a Defaulting Lender at such time then there shall
         be excluded from the determination of Required Lenders the aggregate
         principal amount of Credit Exposure of such Lender at such time. For
         purposes of the preceding sentence, the term "Credit Exposure" as
         applied to each Lender shall mean (a) at any time prior to the
         termination of the Commitments, the Revolving Loan Commitment
         Percentage of such Lender multiplied by the Revolving Committed Amount
         and (b) at any time after the termination of the Commitments, the sum
         of (i) the principal balance of the outstanding Loans of such Lender
         plus (ii) such Lender's Participation Interests in the face amount of
         the outstanding Letters of Credit.

                  "Requirement of Law" means, as to any Person (who is not a
         Lender), the articles or certificate of incorporation and by-laws or
         other organizational or governing documents of such Person and as to
         any Person, any law, treaty, rule or regulation or final,
         non-appealable determination of an arbitrator or a court or other
         Governmental Authority, in each case applicable to or binding upon such
         Person or to which any of its material property is subject.

                  "Revolving Loan Commitment Percentage" means, for each Lender,
         the percentage identified as its Revolving Commitment Percentage on
         Schedule 1.1(a), as such percentage may be modified in connection with
         any assignment made in accordance with the provisions of Section 11.3.

                  "Revolving Committed Amount" means TWO HUNDRED FIFTY MILLION
         DOLLARS ($250,000,000) or such lesser amount as the Revolving Committed
         Amount may be reduced pursuant to Section 2.1(d).

                  "Revolving Loan Maturity Date" means November 25, 2001 or such
         earlier date if accelerated in accordance with Section 9.2.

                  "Revolving Loans" means the Revolving Loans made to the
         Borrower pursuant to Section 2.1.



                                       19

<PAGE>



                  "Revolving Note" or "Revolving Notes" means the promissory
         notes of the Borrower in favor of each of the Lenders evidencing the
         Revolving Loans provided pursuant to Section 2.1, individually or
         collectively, as appropriate, as such promissory notes may be amended,
         modified, supplemented, extended, renewed or replaced from time to time
         and as evidenced in the form of Exhibit 2.1(g).

                  "Rights Plan" means that certain Rights Agreement to be
         entered into between the Borrower and Harris Trust and Savings Bank.

                  "S&P" means Standard & Poor's Ratings Group, a division of
         McGraw Hill, Inc., or any successor or assignee of the business of such
         division in the business of rating securities.

                  "SEC Documents" means the Borrower's Registration Statement on
         Form 10, File No. 1-12213, filed with the Securities and Exchange
         Commission on September 23, 1996, as further amended by Amendment No.
         1, filed November 5, 1996, and Amendment No. 2, filed November 19, 1996
         and as it may be further amended and supplemented on or before the
         Effective Date.

                  "Securities Act" means the Securities Act of 1933, as amended,
         and the rules and regulations promulgated thereunder.

                  "Single Employer Plan" means any Plan which is covered by
         Title IV of ERISA, but which is not a Multiemployer Plan.

                  "Solvent" means, with respect to any Credit Party as of a
         particular date, that on such date (a) such Credit Party is able to pay
         its debts and other liabilities, contingent obligations and other
         commitments as they mature in the normal course of business, (b) such
         Credit Party does not intend to, and does not believe that it will,
         incur debts or liabilities beyond such Credit Party's ability to pay as
         such debts and liabilities mature in their ordinary course, (c) such
         Credit Party is not engaged in a business or a transaction, and is not
         about to engage in a business or a transaction, for which such Credit
         Party's assets would constitute unreasonably small capital after giving
         due consideration to the prevailing practice in the industry in which
         such Credit Party is engaged or is to engage, (d) the fair value of the
         assets of such Credit Party is greater than the total amount of
         liabilities, including, without limitation, contingent liabilities, of
         such Credit Party and (e) the present fair saleable value of the assets
         of such Credit Party is not less than the amount that will be required
         to pay the probable liability of such Credit Party on its debts as they
         become absolute and matured. The Calculation of Solvent for each Credit
         Party shall be made for such Credit Party and its Subsidiaries on a
         consolidated basis. Furthermore, (i) the assets of each Credit Party
         shall include, without limitation, goodwill and the rights and
         properties of such Credit Party pursuant to Section 4.8, to the extent
         of their fair value or fair saleable value, as applicable; and (ii)
         contingent liabilities, at any time, will be equal to the amount which,
         in light of all the facts and circumstances existing at such time,
         represents the amount that can reasonably be expected to become an
         actual or matured liability; it being understood that the contingent
         liabilities under the Tax Indemnification Agreements and the
         Transaction Agreement shall be assumed to be zero for the purpose of
         calculating whether any Credit Party is Solvent


                                       20

<PAGE>



         because, as of the Closing Date, each Credit Party believes that there
         is no reasonable expectation of any actual liability.

                  "Spin-Off" has the meaning set forth in Section 5.1(e).

                  "Subsidiary" means, as to any Person, (a) any corporation more
         than 50% of whose stock of any class or classes having by the terms
         thereof ordinary voting power to elect a majority of the directors of
         such corporation (irrespective of whether or not at the time, any class
         or classes of such corporation shall have or might have voting power by
         reason of the happening of any contingency) is at the time owned by
         such Person directly or indirectly through Subsidiaries, and (b) any
         partnership, association, joint venture, limited liability company or
         other entity in which such person directly or indirectly through
         Subsidiaries has more than a 50% equity interest at any time.

                  "Swing Line Loans" means the loans made by NationsBank
         pursuant to Section 2.4.

                  "Swing Line Committed Amount" means Ten Million Dollars
         ($10,000,000).

                  "Swing Line Loan Request" means a request by the Borrower for
         a Swing Line Loan in substantially the form of Exhibit 2.4(b).

                  "Swing Line Loan Note" means the promissory note of the
         Borrower in favor of NationsBank evidencing the Swing Line Loans
         provided pursuant to Section 2.4, as such promissory note may be
         amended, modified, supplemented, extended, renewed or replaced from
         time to time in and as evidenced by the form of Exhibit 2.4(e).

                  "Syndication Agent" means Wachovia Bank of Georgia, N.A.

                  "Tax Indemnification Agreements" means the Corning/CPS
         Spin-Off Tax Indemnification Agreement to be entered into between
         Corning Incorporated and the Borrower, the CPS/CCL Spin-Off Tax
         Indemnification Agreement to be entered into between the Borrower and
         Corning Clinical Laboratories Inc. and the CCL/CPS Spin-Off Tax
         Indemnification Agreement to be entered into between Corning Clinical
         Laboratories Inc. and the Borrower, each as it may be amended,
         supplemented or otherwise modified from time to time in accordance with
         its terms.

                  "Tax Sharing Agreement" means that certain Tax Sharing
         Agreement to be entered into by and among Corning Incorporated, Corning
         Clinical Laboratories Inc. and the Borrower, each as it may be amended,
         modified, supplemented or otherwise modified from time to time in
         accordance with its terms.

                  "Termination Event" means (a) with respect to any Single
         Employer Plan, the occurrence of a Reportable Event or the substantial
         cessation of operations (within the meaning of Section 4062(e) of
         ERISA); (b) the withdrawal of any Credit Party or any of its
         Subsidiaries or any ERISA Affiliate from a Multiple Employer Plan
         during a plan year in which it was a substantial employer (as such term
         is defined in Section 4001(a)(2) of


                                       21

<PAGE>



         ERISA), or the termination of a Multiple Employer Plan; (c) the
         distribution of a notice of intent to terminate or the actual
         termination of a Plan pursuant to Section 4041(a)(2) or 4041A of ERISA;
         (d) the institution of proceedings to terminate or the actual
         termination of a Plan by the PBGC under Section 4042 of ERISA; (e) any
         event or condition which might reasonably constitute grounds under
         Section 4042 of ERISA for the termination of, or the appointment of a
         trustee to administer, any Plan; or (f) the complete or partial
         withdrawal of any Credit Party or any of its Subsidiaries or any ERISA
         Affiliate from a Multiemployer Plan. For the purposes of subsections
         (d) and (e) of this definition, "ERISA Affiliate" means an entity,
         whether or not incorporated, which is under common control with any
         Credit Party or any of its Subsidiaries within the meaning of Section
         4001(a)(14) of ERISA, or is a member of a group which includes any
         Credit Party or any of its Subsidiaries and which is treated as a
         single employer under Section 414(b), (c), (m), or (o) of the Code;
         provided, however, that such definition shall apply only if such
         Termination Event could reasonably be expected to have a Material
         Adverse Effect. Otherwise, the definition of "ERISA Affiliate"
         generally applicable under this Credit Agreement shall apply.

                  "Transaction Agreement" means the Transaction Agreement to be
         entered into among Corning Incorporated, Corning Life Sciences Inc.,
         Corning Clinical Laboratories Inc. and the Borrower, as may be amended,
         supplemented or modified from time to time in accordance with its
         terms.

                  "U.S. Dollar Equivalent" means the amount of Dollars that
         would be realized by converting a Foreign Currency into Dollars using
         the arithmetic average of the spot buying rates for such Foreign
         Currency in Dollars as quoted to the Administrative Agent by three
         foreign exchange dealers of recognized standing in the United States
         selected by the Administrative Agent at approximately 10:00 a.m. on any
         day on which a computation thereof is required to be made hereunder.

                  "Voting Stock" of a corporation means, at any time, all
         classes of the capital stock of such corporation then outstanding and
         ordinarily entitled to vote in the election of directors.

         1.2 Computation of Time Periods and Other Definitional Provisions. For
purposes of computation of periods of time hereunder, the word "from" means
"from and including" and the words "to" and "until" each mean "to but
excluding." References in this Agreement to "Articles", "Sections", "Schedules"
or "Exhibits" shall be to Articles, Sections, Schedules or Exhibits of or to
this Agreement unless otherwise specifically provided.

         1.3 Accounting Terms. Except as otherwise expressly provided herein,
all accounting terms used herein shall be interpreted, and all financial
statements and certificates and reports as to financial matters required to be
delivered to the Lenders hereunder shall be prepared, in accordance with GAAP
applied on a consistent basis. All calculations made for the purposes of
determining compliance with this Credit Agreement shall (except as otherwise
expressly provided herein) be made by application of GAAP applied on a basis
consistent with the most recent annual or quarterly financial statements
delivered pursuant to Section 7.1 (or, prior to the delivery of the first
financial statements pursuant to Section 7.1, consistent with the financial
statements described in Section


                                       22

<PAGE>



5.1(c)); provided, however, if (a) the Borrower shall object to determining such
compliance on such basis at the time of delivery of such financial statements
due to any change in GAAP or the rules promulgated with respect thereto or (b)
either Agent or the Required Lenders shall so object in writing within 60 days
after delivery of such financial statements (or after the Lenders have been
informed of the change in GAAP affecting such financial statements, if later),
then for the period following such objection, unless otherwise agreed by the
Borrower and the Required Lenders, such calculations shall be made on a basis
consistent with the most recent financial statements delivered by the Borrower
to the Lenders as to which no such objection shall have been made.


                                    SECTION 2

                                CREDIT FACILITIES

         2.1      Revolving Loans.

                  (a) Revolving Loan Commitment. Subject to the terms and
         conditions set forth herein, each Lender severally agrees to make
         revolving loans (each a "Revolving Loan" and collectively the
         "Revolving Loans") to the Borrower, in Dollars or in Foreign Currency,
         at any time and from time to time, during the period from and including
         the Effective Date to but not including the Revolving Loan Maturity
         Date (or such earlier date if the Revolving Committed Amount has been
         terminated as provided herein); provided, however, that (i) the sum of
         the aggregate amount of Revolving Loans outstanding plus the aggregate
         amount of LOC Obligations outstanding plus the aggregate amount of
         Swing Line Loans outstanding plus the aggregate amount of Competitive
         Bid Loans outstanding shall not exceed the Revolving Committed Amount,
         (ii) with respect to each individual Lender, the Lender's pro rata
         share of outstanding Revolving Loans plus such Lender's pro rata share
         of outstanding LOC Obligations shall not exceed such Lender's Revolving
         Loan Commitment Percentage of the Revolving Committed Amount and (iii)
         the amount of Revolving Loans outstanding in Foreign Currency plus
         Competitive Bid Loans outstanding in Foreign Currency shall not exceed
         the U.S. Dollar Equivalent of Fifty Million Dollars ($50,000,000).
         Subject to the terms of this Credit Agreement (including Section 3.3),
         the Borrower may borrow, repay and reborrow Revolving Loans.

                  (b) Method of Borrowing for Revolving Loans. By no later than
         11:00 a.m. (i) one Business Day prior to the date of the requested
         borrowing of Revolving Loans that will be Base Rate Loans or (ii) three
         Business Days prior to the date of the requested borrowing of Revolving
         Loans that will be Eurocurrency Loans, the Borrower shall submit a
         written Notice of Borrowing in substantially the form of Exhibit 2.1(b)
         to the Administrative Agent setting forth (A) the amount requested, (B)
         whether such Revolving Loans shall accrue interest at the Base Rate or
         the Adjusted Eurocurrency Rate, (C) with respect to Revolving Loans
         that will be Eurocurrency Loans, the Interest Period applicable
         thereto, (D) whether the Revolving Loan is requested in Dollars or in a
         Foreign Currency and (E) certification that the Borrower has complied
         in all respects with Section 5.2. Notwithstanding the above, the
         Borrower may not request Revolving Loans made in a Foreign Currency to
         accrue interest at the Base Rate unless the Adjusted Eurocurrency Rate
         is not available.


                                       23

<PAGE>



                  (c) Funding of Revolving Loans. Upon receipt of a Notice of
         Borrowing, the Administrative Agent shall promptly inform the Lenders
         as to the terms thereof. Each Lender shall make its Revolving Loan
         Commitment Percentage of the requested Revolving Loans available to the
         Administrative Agent by 1:00 p.m. on the date specified in the Notice
         of Borrowing by deposit, in Dollars or the applicable Foreign Currency,
         of immediately available funds at the principal office of the
         Administrative Agent in Charlotte, North Carolina or at such other
         address as the Administrative Agent may designate in writing. The
         amount of the requested Revolving Loans will then be made available to
         the Borrower by the Administrative Agent by crediting the account of
         the Borrower on the books of such office of the Administrative Agent,
         to the extent the amount of such Revolving Loans are made available to
         the Administrative Agent.

                  No Lender shall be responsible for the failure or delay by any
         other Lender in its obligation to make Revolving Loans hereunder;
         provided, however, that the failure of any Lender to fulfill its
         obligations hereunder shall not relieve any other Lender of its
         obligations hereunder. Unless the Administrative Agent shall have been
         notified by any Lender prior to the time of any such Revolving Loan
         that such Lender does not intend to make available to the
         Administrative Agent its portion of the Revolving Loans to be made on
         such date, the Administrative Agent may assume that such Lender has
         made such amount available to the Administrative Agent on the date of
         such Revolving Loans, and the Administrative Agent in reliance upon
         such assumption, may (in its sole discretion but without any obligation
         to do so) make available to the Borrower a corresponding amount. If
         such corresponding amount is not in fact made available to the
         Administrative Agent, the Administrative Agent shall be able to recover
         such corresponding amount from such Lender. If such Lender does not pay
         such corresponding amount forthwith upon the Administrative Agent's
         demand therefor, the Administrative Agent will promptly notify the
         Borrower, and the Borrower shall immediately pay such corresponding
         amount to the Administrative Agent. The Administrative Agent shall also
         be entitled to recover from the Lender or the Borrower, as the case may
         be, interest on such corresponding amount in respect of each day from
         the date such corresponding amount was made available by the
         Administrative Agent to the Borrower to the date such corresponding
         amount is recovered by the Administrative Agent at a per annum rate
         equal to (i) from the Borrower at the applicable rate for such
         Revolving Loan pursuant to the Notice of Borrowing and (ii) from a
         Lender at the Federal Funds Rate.

                  (d) Reductions of Revolving Committed Amount. Upon at least
         three Business Days' notice, the Borrower shall have the right to
         permanently terminate or reduce the aggregate unused amount of the
         Revolving Committed Amount at any time or from time to time; provided
         that (i) each partial reduction shall be in an aggregate amount at
         least equal to $5,000,000 and in integral multiples of $1,000,000 above
         such amount and (ii) no reduction shall be made which would reduce the
         Revolving Committed Amount to an amount less than the aggregate amount
         of outstanding Revolving Loans plus the aggregate amount of outstanding
         LOC Obligations plus the aggregate amount of Swing Line Loans
         outstanding plus the aggregate amount of Competitive Bid Loans
         outstanding. Any reduction in (or termination of) the Revolving
         Committed Amount shall be permanent and may not be reinstated. The
         Administrative Agent shall immediately notify the Lenders of any
         reduction in the Revolving Committed Amount.


                                       24

<PAGE>



                  (e) Continuations and Conversions. Subject to the terms of
         Section 5.2 (other than Section 5.2(b)), the Borrower shall have the
         option, on any Business Day, to continue existing Eurocurrency Loans
         for a subsequent Interest Period, to convert Base Rate Loans into
         Eurocurrency Loans or to convert Eurocurrency Loans into Base Rate
         Loans; provided, however, that (i) each such continuation or conversion
         must be requested by the Borrower pursuant to a written Notice of
         Continuation/Conversion, in substantially the form of Exhibit 2.1(e),
         in compliance with the terms set forth below, (ii) except as provided
         in Section 3.11, Eurocurrency Loans may only be continued or converted
         into Base Rate Loans on the last day of the Interest Period applicable
         thereto, (iii) Eurocurrency Loans may not be continued nor may Base
         Rate Loans be converted into Eurocurrency Loans during the existence
         and continuation of a Default or Event of Default and (iv) any request
         to continue a Eurocurrency Loan that fails to comply with the terms
         hereof or any failure to request a continuation of a Eurocurrency Loan
         at the end of an Interest Period shall constitute a conversion to a
         Base Rate Loan on the last day of the applicable Interest Period. Each
         continuation or conversion must be requested by the Borrower no later
         than 11:00 a.m. (A) one Business Day prior to the date for a requested
         conversion of a Eurocurrency Loan to a Base Rate Loan or (B) three
         Business Days prior to the date for a requested continuation of a
         Eurocurrency Loan or conversion of a Base Rate Loan to a Eurocurrency
         Loan, in each case pursuant to a written Notice of
         Continuation/Conversion submitted to the Administrative Agent which
         shall set forth (x) whether the Borrower wishes to continue or convert
         such Loans and (y) if the request is to continue a Eurocurrency Loan or
         convert a Base Rate Loan to a Eurocurrency Loan, the Interest Period
         applicable thereto. Notwithstanding the foregoing, Loans made in
         Foreign Currency may not be continued or converted pursuant to this
         Section 2.1(e) but instead must be repaid at the end of the applicable
         Interest Period in the Foreign Currency in which such Loan was made.

                  (f) Minimum Amounts. Each request for a borrowing, conversion
         or continuation shall be subject to the requirements that (i) each
         Eurocurrency Loan shall be in a minimum amount of $5,000,000 and in
         integral multiples of $1,000,000 in excess thereof, or in the case of a
         Foreign Currency, the U.S. Dollar Equivalents of such amounts, (ii)
         each Base Rate Loan shall be in a minimum amount of the lesser of
         $1,000,000 (and integral multiples of $100,000 in excess thereof) or
         the remaining amount available under the Revolving Committed Amount, or
         in the case of a Foreign Currency, the U.S. Dollar Equivalents of such
         amounts and (iii) no more than eight Eurocurrency Loans shall be
         outstanding hereunder at any one time. For the purposes of this
         Section, all Eurocurrency Loans with the same Interest Periods shall be
         considered as one Eurocurrency Loan, but Eurocurrency Loans with
         different Interest Periods, even if they begin on the same date, shall
         be considered as separate Eurocurrency Loans.

                  (g) Notes. The Revolving Loans made by each Lender shall be
         evidenced by a duly executed promissory note of the Borrower to each
         applicable Lender in the face amount of its Revolving Loan Commitment
         Percentage of the Revolving Committed Amount in substantially the form
         of Exhibit 2.1(g).



                                       25

<PAGE>



         2.2      Letter of Credit Subfacility.

                  (a) Issuance. Subject to the terms and conditions hereof and
         of the LOC Documents, if any, and any other terms and conditions which
         the Issuing Lender may reasonably require (so long as such terms and
         conditions do not impose any financial obligation on or require any
         Lien (not otherwise contemplated by this Agreement) to be given by any
         Credit Party or conflict with any obligation of, or detract from any
         action which may be taken by, any Credit Party or their Subsidiaries
         under this Agreement), the Issuing Lender shall from time to time upon
         request issue (from the Effective Date to the Revolving Loan Maturity
         Date and in a form reasonably acceptable to the Issuing Lender), in
         Dollars, and the LOC Participants shall participate in, letters of
         credit (the "Letters of Credit") for the account of the Borrower or any
         of its Subsidiaries; provided, however, that (i) the aggregate amount
         of LOC Obligations shall not at any time exceed the LOC Committed
         Amount, (ii) the sum of the aggregate amount of LOC Obligations
         outstanding plus Revolving Loans outstanding plus Swing Line Loans
         outstanding plus Competitive Bid Loans outstanding shall not exceed the
         Revolving Committed Amount and (iii) with respect to each individual
         LOC Participant, the LOC Participant's pro rata share of outstanding
         Revolving Loans plus its pro rata share of outstanding LOC Obligations
         shall not exceed such LOC Participant's Revolving Loan Commitment
         Percentage of the Revolving Committed Amount. The issuance and expiry
         date of each Letter of Credit shall be a Business Day. Except as
         otherwise expressly agreed upon by all the LOC Participants, each
         Letter of Credit shall have an original expiry date not more than one
         year from the date of issuance; provided that, at the option of the
         Borrower, Letters of Credit may be subject to automatic renewal for
         periods not in excess of one year subject to the conditions that (x)
         the Issuing Lender may give notice to the Borrower not less than 60
         days prior to the effective date of such extension that it will not
         extend such Letter of Credit (and, during the existence and
         continuation of an Event of Default, the Issuing Lender agrees to give
         such notice if instructed by the Required Lenders to do so) and (y) no
         Letter of Credit (or renewal thereof), shall have an expiry date
         extending beyond the Revolving Loan Maturity Date. Each Letter of
         Credit shall be either (x) a standby letter of credit issued to support
         the obligations (including pension or insurance obligations),
         contingent or otherwise, of the Borrower or any of its Subsidiaries, or
         (y) a commercial letter of credit in respect of the purchase of goods
         or services by the Borrower or any of its Subsidiaries in the ordinary
         course of business. Each Letter of Credit shall comply with the related
         LOC Documents.

                  (b) Notice and Reports. The request for the issuance or
         renewal of a Letter of Credit shall be submitted to the Issuing Lender
         at least three Business Days prior to the requested date of issuance or
         renewal. The Issuing Lender will, at least quarterly and more
         frequently upon request, provide to the Administrative Agent for
         dissemination to the Lenders a detailed report specifying the Letters
         of Credit which are then issued and outstanding and any activity with
         respect thereto which may have occurred since the date of the prior
         report, and including therein, among other things, the account party,
         the beneficiary, the face amount, and the expiry date as well as any
         payments or expirations which may have occurred. The Issuing Lender
         will further provide to the Administrative Agent, promptly upon
         request, copies of the Letters of Credit and the other LOC Documents.



                                       26

<PAGE>



                  (c) Participations. Each LOC Participant, upon issuance of a
         Letter of Credit, shall be deemed to have purchased without recourse a
         risk participation from the Issuing Lender in such Letter of Credit and
         each LOC Document related thereto and the rights and obligations
         arising thereunder and any collateral relating thereto, in each case in
         an amount equal to its Revolving Loan Commitment Percentage of the
         obligations under such Letter of Credit, and shall absolutely,
         unconditionally and irrevocably assume, as primary obligor and not as
         surety, and be obligated to pay to the Issuing Lender therefor and
         discharge when due, its Revolving Loan Commitment Percentage of the
         obligations arising under such Letter of Credit. Without limiting the
         scope and nature of each LOC Participant's participation in any Letter
         of Credit, to the extent that the Issuing Lender has not been
         reimbursed as required hereunder or under any such Letter of Credit,
         each such LOC Participant shall pay to the Issuing Lender its Revolving
         Loan Commitment Percentage of such unreimbursed drawing in same day
         funds on the day of notification by the Issuing Lender of an
         unreimbursed drawing pursuant to the provisions of subsection (d)
         hereof. The obligation of each LOC Participant to so reimburse the
         Issuing Lender shall be absolute and unconditional and shall not be
         affected by the occurrence of a Default, an Event of Default or any
         other occurrence or event. Any such reimbursement shall not relieve or
         otherwise impair the obligation of the Borrower or any other Credit
         Party to reimburse the Issuing Lender under any Letter of Credit,
         together with interest as hereinafter provided.

                  (d) Reimbursement. In the event of any drawing under any
         Letter of Credit, the Issuing Lender will promptly notify the Borrower.
         Unless the Borrower shall immediately notify the Issuing Lender of its
         intent to otherwise reimburse the Issuing Lender, the Borrower shall be
         deemed to have requested a Revolving Loan in Dollars at the Base Rate
         in the amount of the drawing as provided in subsection (e) hereof, the
         proceeds of which will be used to satisfy the reimbursement
         obligations. The Borrower shall reimburse the Issuing Lender on the day
         of drawing (unless such notice is received after 1:00 p.m. on such day
         and then on the next succeeding Business Day with the outstanding
         amount accruing interest at the Base Rate until reimbursed) under any
         Letter of Credit either with the proceeds of a Revolving Loan obtained
         hereunder or otherwise in same day funds as provided herein or in the
         LOC Documents. If the Borrower shall fail to reimburse the Issuing
         Lender as provided hereinabove, the unreimbursed amount of such drawing
         shall bear interest at a per annum rate equal to the Base Rate plus two
         percent (2%). The Borrower's reimbursement obligations hereunder shall
         be absolute and unconditional under all circumstances irrespective of
         (but without waiver of) any rights of set-off, counterclaim or defense
         to payment that the applicable account party or the Borrower may claim
         or have against the Issuing Lender, the Agents, the Lenders, the
         beneficiary of the Letter of Credit drawn upon or any other Person,
         including without limitation, any defense based on any failure of the
         applicable account party, the Borrower or any other Credit Party to
         receive consideration or the legality, validity, regularity or
         unenforceability of the Letter of Credit. The Issuing Lender will
         promptly notify the LOC Participants of the amount of any unreimbursed
         drawing and each LOC Participant shall promptly pay to the
         Administrative Agent for the account of the Issuing Lender, in Dollars
         and in immediately available funds, the amount of such LOC
         Participant's Revolving Loan Commitment Percentage of such unreimbursed
         drawing. Such payment shall be made on the day such notice is received
         by such Lender from the Issuing Lender if such notice is received at or
         before 2:00 p.m., otherwise such


                                       27

<PAGE>



         payment shall be made at or before 12:00 Noon on the Business Day next
         succeeding the day such notice is received. If such LOC Participant
         does not pay such amount to the Issuing Lender in full upon such
         request, such LOC Participant shall, on demand, pay to the
         Administrative Agent for the account of the Issuing Lender interest on
         the unpaid amount during the period from the date the LOC Participant
         received the notice regarding the unreimbursed drawing until such LOC
         Participant pays such amount to the Issuing Lender in full at a rate
         per annum equal to, if paid within two Business Days of the date of
         drawing, the Federal Funds Rate and thereafter at a rate equal to the
         Base Rate. Each LOC Participant's obligation to make such payment to
         the Issuing Lender, and the right of the Issuing Lender to receive the
         same, shall be absolute and unconditional, shall not be affected by any
         circumstance whatsoever and without regard to the termination of this
         Credit Agreement or the Commitments hereunder, the existence of a
         Default or Event of Default or the acceleration of the obligations
         hereunder and shall be made without any offset, abatement, withholding
         or reduction whatsoever. Simultaneously with the making of each such
         payment by a LOC Participant to the Issuing Lender, such LOC
         Participant shall, automatically and without any further action on the
         part of the Issuing Lender or such LOC Participant, acquire a
         participation in an amount equal to such payment (excluding the portion
         of such payment constituting interest owing to the Issuing Lender) in
         the related unreimbursed drawn portion of the LOC Obligation and in the
         interest thereon and in the related LOC Documents, and shall have a
         claim against the Borrower and the other Credit Parties with respect
         thereto (including the reimbursement obligation).

                  (e) Repayment with Revolving Loans. On any day on which the
         Borrower shall have requested, or been deemed to have requested, a
         Revolving Loan borrowing to reimburse a drawing under a Letter of
         Credit, the Administrative Agent shall give notice to the applicable
         Lenders that a Revolving Loan has been requested or deemed requested in
         connection with a drawing under a Letter of Credit, in which case a
         Revolving Loan borrowing comprised solely of Base Rate Loans in Dollars
         (each such borrowing, a "Mandatory Borrowing") shall be immediately
         made from all applicable Lenders (without giving effect to any
         termination of the Commitments pursuant to Section 9.2) pro rata based
         on each Lender's respective Revolving Loan Commitment Percentage and
         the proceeds thereof shall be paid directly to the Issuing Lender for
         application to the respective LOC Obligations. Each such Lender hereby
         irrevocably agrees to make such Revolving Loans immediately upon any
         such request or deemed request on account of each such Mandatory
         Borrowing in the amount and in the manner specified in the preceding
         sentence and on the same such date notwithstanding (i) the amount of
         Mandatory Borrowing may not comply with the minimum amount for
         borrowings of Revolving Loans otherwise required hereunder, (ii)
         whether any conditions specified in Section 5 are then satisfied, (iii)
         whether a Default or Event of Default then exists, (iv) failure of any
         such request or deemed request for Revolving Loans to be made by the
         time otherwise required hereunder, (v) the date of such Mandatory
         Borrowing, or (vi) any reduction in the Revolving Committed Amount or
         any termination of the Commitments. In the event that any Mandatory
         Borrowing cannot for any reason be made on the date otherwise required
         above (including, without limitation, as a result of the commencement
         of a proceeding under the Bankruptcy Code with respect to the Borrower
         or any other Credit Party), then each such Lender hereby agrees that it
         shall forthwith fund (as of the date the Mandatory Borrowing would
         otherwise have occurred, but


                                       28

<PAGE>



         adjusted for any payments received from the Borrower on or after such
         date and prior to such purchase) its Participation Interest in the
         outstanding LOC Obligations; provided that in the event any Lender
         shall fail to fund its Participation Interest on the day the Mandatory
         Borrowing would otherwise have occurred, then the amount of such
         Lender's unfunded Participation Interest therein shall bear interest
         payable to the Issuing Lender upon demand, at the rate equal to, if
         paid within two Business Days of such date, the Federal Funds Rate, and
         thereafter at a rate equal to the Base Rate.

                  (f) Modification and Extension. The issuance of any
         supplement, modification or amendment, renewal, or extensions
         (excluding extensions on an "evergreen" basis pursuant to Section
         2.2(a)) to any Letter of Credit shall, for purposes hereof, be treated
         in all respects the same as the issuance of a new Letter of Credit
         hereunder.

                  (g) Uniform Customs and Practices. The Issuing Lender may have
         the Letters of Credit be subject to The Uniform Customs and Practice
         for Documentary Credits, as published as of the date of issue by the
         International Chamber of Commerce (Publication No. 500 or the most
         recent publication, the "UCP"), in which case the UCP may be
         incorporated therein and deemed in all respects to be a part thereof.

                  (h) Responsibility of Issuing Lender. It is expressly
         understood and agreed as between the Lenders that the obligations of
         the Issuing Lender hereunder to the LOC Participants are only those
         expressly set forth in this Credit Agreement and that the Issuing
         Lender shall be entitled to assume that the conditions precedent set
         forth in Section 5 have been satisfied unless it shall have acquired
         actual knowledge that any such condition precedent has not been
         satisfied; provided, however, that nothing set forth in this Section
         2.2 shall be deemed to prejudice the right of any LOC Participant to
         recover from the Issuing Lender any amounts made available by such LOC
         Participant to the Issuing Lender pursuant to this Section 2.2 in the
         event that it is determined by a court of competent jurisdiction that
         the payment with respect to a Letter of Credit constituted gross
         negligence or willful misconduct on the part of the Issuing Lender.

                  (i) Conflict with LOC Documents. In the event of any conflict
         between this Credit Agreement and any LOC Document, this Credit
         Agreement shall govern.

                  (j)      Indemnification of Issuing Lender.

                                  (i) In addition to its other obligations under
                  this Credit Agreement, the Borrower hereby agrees to protect,
                  indemnify, pay and save the Issuing Lender harmless from and
                  against any and all claims, demands, liabilities, damages,
                  losses, costs, charges and expenses (including reasonable
                  attorneys' fees) that the Issuing Lender may incur or be
                  subject to as a consequence, direct or indirect, of (A) the
                  issuance of any Letter of Credit or (B) the failure of the
                  Issuing Lender to honor a drawing under a Letter of Credit as
                  a result of any act or omission, whether rightful or wrongful,
                  of any present or future de jure or de facto government or
                  governmental authority (all such acts or omissions, herein
                  called "Government Acts").


                                       29

<PAGE>



                                 (ii) As between the Borrower and the Issuing
                  Lender, the Borrower shall assume all risks of the acts,
                  omissions or misuse of any Letter of Credit by the beneficiary
                  thereof. The Issuing Lender shall not be responsible for
                  (except in the case of (A), (B) and (C) below if the Issuing
                  Lender has actual knowledge to the contrary): (A) the form,
                  validity, sufficiency, accuracy, genuineness or legal effect
                  of any document submitted by any party in connection with the
                  application for and issuance of any Letter of Credit, even if
                  it should in fact prove to be in any or all respects invalid,
                  insufficient, inaccurate, fraudulent or forged; (B) the
                  validity or sufficiency of any instrument transferring or
                  assigning or purporting to transfer or assign any Letter of
                  Credit or the rights or benefits thereunder or proceeds
                  thereof, in whole or in part, that may prove to be invalid or
                  ineffective for any reason; (C) failure of the beneficiary of
                  a Letter of Credit to comply fully with conditions required in
                  order to draw upon a Letter of Credit; (D) errors, omissions,
                  interruptions or delays in transmission or delivery of any
                  messages, by mail, cable, telegraph, telex or otherwise,
                  whether or not they be in cipher; (E) errors in interpretation
                  of technical terms; (F) any loss or delay in the transmission
                  or otherwise of any document required in order to make a
                  drawing under a Letter of Credit or of the proceeds thereof;
                  and (G) any consequences arising from causes beyond the
                  control of the Issuing Lender, including, without limitation,
                  any Government Acts. None of the above shall affect, impair,
                  or prevent the vesting of the Issuing Lender's rights or
                  powers hereunder.

                                (iii) In furtherance and extension and not in
                  limitation of the specific provisions hereinabove set forth,
                  any action taken or omitted by the Issuing Lender, under or in
                  connection with any Letter of Credit or the related
                  certificates, if taken or omitted in good faith, shall not put
                  the Issuing Lender under any resulting liability to the
                  Borrower or any other Credit Party. It is the intention of the
                  parties that this Credit Agreement shall be construed and
                  applied to protect and indemnify the Issuing Lender against
                  any and all risks involved in the issuance of the Letters of
                  Credit, all of which risks are hereby assumed by the Borrower,
                  including, without limitation, any and all risks of the acts
                  or omissions, whether rightful or wrongful, of any present or
                  future Government Acts. The Issuing Lender shall not, in any
                  way, be liable for any failure by the Issuing Lender or anyone
                  else to pay any drawing under any Letter of Credit as a result
                  of any Government Acts or any other cause beyond the control
                  of the Issuing Lender.

                                 (iv) Nothing in this subsection (j) is intended
                  to limit the reimbursement obligation of the Borrower
                  contained in this Section 2.2. The obligations of the Borrower
                  under this subsection (j) shall survive the termination of
                  this Credit Agreement. No act or omission of any current or
                  prior beneficiary of a Letter of Credit shall in any way
                  affect or impair the rights of the Issuing Lender to enforce
                  any right, power or benefit under this Credit Agreement.

                                  (v) Notwithstanding anything to the contrary
                  contained in this subsection (j), the Borrower shall have no
                  obligation to indemnify the Issuing Lender in respect of any
                  liability incurred by the Issuing Lender arising solely out of
                  the


                                       30

<PAGE>



                  gross negligence or willful misconduct of the Issuing Lender,
                  as determined by a court of competent jurisdiction. Nothing in
                  this Agreement shall relieve the Issuing Lender of any
                  liability to the Borrower in respect of any action taken by
                  the Issuing Lender which action constitutes gross negligence
                  or willful misconduct of the Issuing Lender or a violation of
                  the UCP or Uniform Commercial Code (as applicable), as
                  determined by a court of competent jurisdiction. The Borrower
                  shall have a claim against the Issuing Lender, and the Issuing
                  Lender shall be liable to the Borrower, to the extent of any
                  direct, but not consequential, damages suffered by the
                  Borrower that the Borrower proves were caused by (i) the
                  Issuing Lender's willful misconduct or gross negligence in
                  determining whether documents presented under any Letter of
                  Credit comply with the terms of the Letter of Credit or (ii)
                  the Issuing Lender's willful failure to make lawful payment
                  under a Letter of Credit after the presentation to it of a
                  draft and certificates strictly complying with the terms and
                  conditions of the Letter of Credit.

         2.3      Competitive Bid Loans Subfacility.

                  (a) Competitive Bid Loans. Subject to the terms and conditions
         set forth herein, the Borrower may, from time to time, during the
         period from and including the Effective Date to but not including the
         Revolving Loan Maturity Date, request and each Lender may, in its sole
         discretion, agree to make Competitive Bid Loans, in Dollars or in
         Foreign Currency, to the Borrower; provided, however, that (i) the sum
         of the Revolving Loans outstanding plus Competitive Bid Loans
         outstanding plus Swing Line Loans outstanding plus the aggregate amount
         of LOC Obligations outstanding, shall not exceed the Revolving
         Committed Amount, (ii) if a Lender does make a Competitive Bid Loan it
         shall not reduce such Lender's obligation to make its pro rata share of
         any Revolving Loan, and (iii) the amount of Revolving Loans outstanding
         in Foreign Currency plus Competitive Bid Loans outstanding in Foreign
         Currency shall not exceed the U.S. Dollar Equivalent of Fifty Million
         Dollars ($50,000,000).

                  (b) Competitive Bid Requests. The Borrower may solicit
         Competitive Bids by delivery of a Competitive Bid Loan Request to the
         Administrative Agent by 10:00 a.m. on a Business Day not less than (x)
         in the case of Fixed Rate Competitive Loans not made in a Foreign
         Currency, three Business Days and (y) in the case of Eurocurrency
         Competitive Loans and Fixed Rate Competitive Loans made in a Foreign
         Currency, five Business Days prior to the date of a requested
         Competitive Bid Loan. A Competitive Bid Loan Request must be
         substantially in the form of Exhibit 2.3(b) and shall specify (i) the
         date of the requested Competitive Bid Loan (which shall be a Business
         Day), (ii) the amount of the requested Competitive Bid Loan, (iii) the
         applicable Interest Periods requested (iv) whether such Competitive Bid
         Loan will be a Eurocurrency Competitive Loan or a Fixed Rate
         Competitive Loan, and (v) whether such Competitive Bid Loan is to be
         made in Dollars or in Foreign Currency and shall be accompanied by the
         Competitive Bid Request Fee set forth in the Fee Letter and shall
         comply in all respects with Section 5.2. The Administrative Agent shall
         notify the Lenders of its receipt of a Competitive Bid Request and the
         contents thereof and invite the Lenders to submit Competitive Bids in
         response thereto. The Borrower may not request a Competitive Bid for
         more than three different Interest Periods


                                       31

<PAGE>



         per Competitive Bid Request and Competitive Bid Requests may be made no
         more frequently than once every five Business Days.

                  (c) Competitive Bid Procedure. Each Lender may, in its sole
         discretion, make one or more Competitive Bids to the Borrower in
         response to a Competitive Bid Request. Each Competitive Bid must be
         received by the Administrative Agent not later than 10:00 a.m. (x) in
         the case of Fixed Rate Competitive Loans not made in a Foreign Currency
         on the proposed date of a Competitive Bid Loan advance and (y) in the
         case of Eurocurrency Competitive Loans and Fixed Rate Competitive Loans
         made in a Foreign Currency, three Business Days prior to the proposed
         dated of a Competitive Bid Loan advance; provided, however, that should
         the Administrative Agent, in its capacity as a Lender, desire to submit
         a Competitive Bid it shall notify the Borrower of its Competitive Bid
         and the terms thereof not later than 9:30 a.m. on such date. A Lender
         may offer to make all or part of the requested Competitive Bid Loan and
         may submit multiple Competitive Bids in response to a Competitive Bid
         Request. The Competitive Bid must specify (i) the particular
         Competitive Bid Request as to which the Competitive Bid is submitted,
         (ii) the minimum (which shall be not less than $1,000,000 and integral
         multiples of $500,000 in excess thereof, or in the case of a Foreign
         Currency, the U.S. Dollar Equivalent), and maximum principal amounts of
         the requested Competitive Bid Loan or Loans as to which the Lender is
         willing to make, (iii) the applicable interest rate or rates (which (A)
         in the case of a Eurocurrency Competitive Loan, shall be the
         Eurocurrency Rate for the Interest Period in effect for such Loan plus
         the margin offered by such Lender and accepted by the Borrower and (B)
         in the case of a Fixed Rate Competitive Loan, shall be a fixed rate per
         annum (computed on the basis of a 360-day year or the actual number of
         days elapsed) offered by such Lender and accepted by the Borrower) (the
         "Fixed Rate") and Interest Period or Interest Periods therefor, (iv)
         whether such Competitive Bid Loan will be a Eurocurrency Competitive
         Loan or a Fixed Rate Competitive Loan and (v) the currency in which the
         Competitive Bid is made. A Competitive Bid submitted by a Lender in
         accordance with the provisions hereof shall be irrevocable. The
         Administrative Agent shall promptly notify the Borrower of all
         Competitive Bids made and the terms thereof and shall send a copy of
         each of the Competitive Bids to the Borrower for its records as soon as
         practicable.

                  (d) Acceptance of Competitive Bids. The Borrower may, in its
         sole discretion, subject only to the provisions of this subsection (d),
         accept or refuse any Competitive Bid offered to it. To accept a
         Competitive Bid, the Borrower shall give telephonic notification of its
         acceptance of any or all such Competitive Bids to the Administrative
         Agent by 11:00 a.m. on the proposed date of a Competitive Bid Loan
         which shall be promptly confirmed in writing; provided, however, (i)
         the failure by the Borrower to give timely notice of its acceptance of
         a Competitive Bid shall be deemed to be a refusal thereof, (ii) to the
         extent Competitive Bids are for comparable Interest Periods, the
         Borrower may accept Competitive Bids only in ascending order of rates,
         (iii) the aggregate amount of Competitive Bids accepted by the Borrower
         shall not exceed the principal amount specified in the Competitive Bid
         Request, (iv) if the Borrower shall accept a bid or bids made at a
         particular Competitive Bid Rate, but the amount of such bid or bids
         shall cause the total amount of bids to be accepted by the Borrower to
         be in excess of the amount specified in the Competitive Bid Request,
         then the Borrower shall accept a portion of such bid or bids in an
         amount equal to


                                       32

<PAGE>



         the amount specified in the Competitive Bid Request less the amount of
         all other Competitive Bids accepted with respect to such Competitive
         Bid Request, which acceptance shall be made pro rata in accordance with
         the amount of each such bid at such Competitive Bid Rate and (v) no bid
         shall be accepted for a Competitive Bid Loan unless such Competitive
         Bid Loan is in a minimum principal amount of $1,000,000 and integral
         multiples of $500,000 in excess thereof or in the case of a Foreign
         Currency, the U.S. Dollar equivalent, except that where a portion of a
         Competitive Bid is accepted in accordance with the provisions of
         subsection (iv) hereof, then in a minimum principal amount of $100,000
         and integral multiples of $100,000 (but not in any event less than the
         minimum amount specified in the Competitive Bid), and in calculating
         the pro rata allocation of acceptances of portions of multiple bids at
         a particular Competitive Bid Rate pursuant to subsection (iv) hereof,
         the amounts shall be rounded to integral multiples of $100,000, or in
         the case of a Foreign Currency, the U.S. Dollar equivalent, in a manner
         which shall be in the discretion of the Borrower. A notice of
         acceptance of a Competitive Bid given by the Borrower in accordance
         with the provisions hereof shall be irrevocable. The Administrative
         Agent shall, not later than 1:00 p.m. on the date of receipt from the
         Borrower of its acceptance or rejection of Competitive Bid, notify each
         bidding Lender whether or not its Competitive Bid has been accepted
         (and if so, in what amount and at what Competitive Bid Rate), and each
         successful bidder will thereupon become bound, subject to the other
         applicable conditions hereof, to make the Competitive Bid Loan in
         respect of which its bid has been accepted.

                  (e) Funding of Competitive Bid Loans. Each Lender that is to
         make a Competitive Bid Loan shall make its Competitive Bid Loan
         available to the Administrative Agent by 2:00 P.M. on the date
         specified in the Competitive Bid Request by deposit in Dollars or the
         applicable Foreign Currency of immediately available funds at the
         office of the Administrative Agent in Charlotte, North Carolina, or at
         such other address as the Administrative Agent may designate in
         writing. The Administrative Agent will, upon receipt, make the proceeds
         of such Competitive Bid Loans available to the Borrower.

                  (f) Maturity of Competitive Bid Loans. Each Competitive Bid
         Loan shall mature and be due and payable in full, in the currency in
         which made, on the last day of the Interest Period applicable thereto.
         Unless the Borrower shall give notice to the Administrative Agent
         otherwise, or a Default or Event of Default exists and is continuing,
         on the Business Day prior to the last day of the applicable Interest
         Period of a maturing Competitive Bid Loan, the Borrower shall be deemed
         to have requested from all of the Lenders Revolving Loans in Dollars in
         the amount of such maturing Competitive Bid Loan, accruing interest at
         the Base Rate, the proceeds of which will be used to repay such
         Competitive Bid Loan.

                  (g) Minimum Amounts. Each Competitive Bid Loan shall be in an
         amount not less than $1,000,000 and in integral multiples of $100,000
         thereof.

                  (h) Competitive Bid Loan Notes. The Competitive Bid Loans made
         by each Lender shall be evidenced by a duly executed promissory note of
         the Borrower to such Lender in the original principal amount of the
         Revolving Committed Amount and in substantially the form of Exhibit
         2.3(h).



                                       33

<PAGE>



         2.4      Swing Line Loans Subfacility.

                  (a) Swing Line Loans. NationsBank hereby agrees, on the terms
         and subject to the conditions set forth herein and in the other Credit
         Documents, to make loans to the Borrower in Dollars at any time and
         from time to time during the period from and including the Effective
         Date to but not including the Revolving Loan Maturity Date (each such
         loan, a "Swing Line Loan" and collectively, the "Swing Line Loans");
         provided that (i) the aggregate principal amount of the Swing Line
         Loans outstanding at any one time shall not exceed the Swing Line
         Committed Amount and (ii) the sum of Swing Line Loans outstanding plus
         Revolving Loans outstanding plus Competitive Bid Loans outstanding plus
         the aggregate amount of LOC Obligations outstanding shall not exceed
         the Revolving Committed Amount. Prior to the Revolving Loan Maturity
         Date, Swing Line Loans may be repaid and reborrowed by the Borrower in
         accordance with the provisions hereof. Upon the request of any Lender,
         NationsBank shall provide such Lender a schedule of Swing Line Loans
         then outstanding.

                  (b) Method of Borrowing and Funding Swing Line Loans. By no
         later than 10:00 a.m., on the date of the requested borrowing of Swing
         Line Loans, the Borrower shall submit a Swing Line Loan Request to
         NationsBank in the form of Exhibit 2.4(b) setting forth (i) the amount
         of the requested Swing Line Loan, (ii) the date of the requested Swing
         Line Loan and (iii) whether such Swing Line Loan is to be a Base Rate
         Loan or a Quoted Rate Swing Line Loan and if it is a Quoted Rate Swing
         Line Loan, the applicable Interest Period and complying in all respects
         with Section 5.2. If the Borrower has requested a Quoted Rate Swing
         Line Loan, NationsBank shall provide to the Borrower, no later than
         1:00 p.m. on the date of the request, the rate at which NationsBank
         would be willing to provide such Swing Line Loan (the "Quoted Rate").
         The Borrower shall notify NationsBank by 2:00 p.m. on such date whether
         it wishes to accept the Quoted Rate. Failure of the Borrower to timely
         accept the Quoted Rate shall make the Quoted Rate and the corresponding
         Swing Line Loan Request void.

                  (c) Repayment and Participations of Swing Line Loans. The
         Borrower agrees to repay all Swing Line Loans that are Base Rate Loans
         within one Business Day of demand therefor by NationsBank and all Swing
         Line Loans that are Quoted Rate Swing Line Loans at the end of the
         applicable Interest Period. Each repayment of a Swing Line Loan may be
         accomplished by requesting Revolving Loans which request is not subject
         to the conditions set forth in Section 5.2(b). In the event that the
         Borrower shall fail to timely repay any Swing Line Loan, and in any
         event upon (i) a request by NationsBank, (ii) the occurrence of an
         Event of Default described in Section 9.1(f) or (iii) the acceleration
         of any Loan or termination of any Commitment pursuant to Section 9.2,
         each other Lender shall irrevocably and unconditionally purchase from
         NationsBank, without recourse or warranty, an undivided interest and
         participation in such Swing Line Loan in an amount equal to such other
         Lender's Revolving Loan Commitment Percentage thereof, by directly
         purchasing a participation in such Swing Line Loan in such amount
         (regardless of whether the conditions precedent thereto set forth in
         Section 5.2 hereof are then satisfied, whether or not the Borrower has
         submitted a Notice of Borrowing and whether or not the Commitments are
         then in effect, any Event of Default exists or all the Loans have been
         accelerated) and paying the proceeds


                                       34

<PAGE>



         thereof to NationsBank at the address provided in Section 11.1, or at
         such other address as NationsBank may designate, in Dollars and in
         immediately available funds. If such amount is not in fact made
         available to NationsBank by any Lender, NationsBank shall be entitled
         to recover such amount on demand from such Lender, together with
         accrued interest thereon for each day from the date of demand thereof,
         at the Federal Funds Rate. If such Lender does not pay such amount
         forthwith upon NationsBank's demand therefor, and until such time as
         such Lender makes the required payment, NationsBank shall be deemed to
         continue to have outstanding Swing Line Loans in the amount of such
         unpaid participation obligation for all purposes of the Credit
         Documents other than those provisions requiring the other Lenders to
         purchase a participation therein. Further, such Lender shall be deemed
         to have assigned any and all payments made of principal and interest on
         its Loans, and any other amounts due to it hereunder to NationsBank to
         fund Swing Line Loans in the amount of the participation in Swing Line
         Loans that such Lender failed to purchase pursuant to this Section
         2.4(c) until such amount has been purchased (as a result of such
         assignment or otherwise).

                  (d) Minimum Amounts. Each Swing Line Loan shall be in the
         minimum amount of $100,000 and in integral multiples of $50,000 in
         excess thereof.

                  (e) Swing Line Note. The Swing Line Loans made by NationsBank
         shall be evidenced by a duly executed promissory note of the Borrower
         to NationsBank in the face amount of the Swing Line Committed Amount
         and in substantially the form of Exhibit 2.4(e).

         2.5 Currency Equivalents. For purposes of determining compliance with
Section 2.1 and Section 3.3(b), the amount of each Loan outstanding in a Foreign
Currency: (a) shall be converted to its U.S. Dollar Equivalent on the date of
the initial Notice of Borrowing or Competitive Bid Loan Request with respect
thereto and on the date of each Notice of Continuation/Conversion or Competitive
Bid Loan Request requesting a new Interest Period therefor and (b) from and
after any such date, shall be deemed to remain equivalent to the U.S. Dollar
Equivalent determined in accordance with clause (a) notwithstanding any
fluctuation in exchange rates occurring thereafter.


                                    SECTION 3

          GENERAL PROVISIONS APPLICABLE TO LOANS AND LETTERS OF CREDIT

         3.1      Interest.

                  (a) Interest Rate. All Revolving Loans that are Base Rate
         Loans shall accrue interest at the Base Rate. All Swing Line Loans
         shall accrue interest at the Base Rate unless such Swing Line Loan is a
         Quoted Rate Swing Line Loan then at the Quoted Rate applicable thereto.
         All Competitive Bid Loans shall accrue interest at the Competitive Bid
         Rate applicable thereto. All Revolving Loans that are Eurocurrency
         Loans shall accrue interest at the Adjusted Eurocurrency Rate.



                                       35

<PAGE>



                  (b) Default Rate of Interest. Upon the occurrence, and during
         the continuance, of an Event of Default, the principal of and, to the
         extent permitted by law, interest on the Loans and any other amounts
         owing hereunder or under the other Credit Documents (including without
         limitation fees and expenses) shall bear interest, payable on demand,
         at a per annum rate equal to (i) two percent (2%) plus the rate which
         would otherwise be applicable or (ii) if no rate is applicable, the
         Base Rate plus two percent (2%).

                  (c) Interest Payments. Interest on Loans shall be due and
         payable in arrears on each Interest Payment Date. If an Interest
         Payment Date falls on a date which is not a Business Day, such Interest
         Payment Date shall be deemed to be the next succeeding Business Day,
         except that in the case of Eurocurrency Loans where the next succeeding
         Business Day falls in the next succeeding calendar month, then on the
         next preceding Business Day.

         3.2 Place and Manner of Payments. All payments of principal, interest,
fees, expenses and other amounts to be made by a Credit Party under this
Agreement shall be received not later than 2:00 p.m. on the date when due, in
Dollars or the applicable Foreign Currency and in same day funds, by the
Administrative Agent at its offices in Charlotte, North Carolina. Payments
received after such time shall be deemed to have been received on the next
Business Day. The Borrower shall, at the time it makes any payment under this
Agreement, specify to the Administrative Agent, the Loans, Letters of Credit,
fees or other amounts payable by the Borrower hereunder to which such payment is
to be applied (and in the event that it fails to specify, or if such application
would be inconsistent with the terms hereof, the Administrative Agent shall,
subject to Section 3.7, distribute such payment to the Lenders in such manner as
the Administrative Agent may deem appropriate). The Administrative Agent will
distribute such payments to the applicable Lenders if any such payment is
received prior to 2:00 p.m.; otherwise the Administrative Agent will distribute
such payment to the applicable Lenders on the next succeeding Business Day.
Whenever any payment hereunder shall be stated to be due on a day which is not a
Business Day, the due date thereof shall be extended to the next succeeding
Business Day (subject to accrual of interest and fees for the period of such
extension), except that in the case of Eurocurrency Loans, if the extension
would cause the payment to be made in the next following calendar month, then
such payment shall instead be made on the next preceding Business Day.

         3.3      Prepayments.

                  (a) Voluntary Prepayments. The Borrower shall have the right
         to prepay Loans in whole or in part from time to time without premium
         or penalty; provided, however, that (i) Eurocurrency Loans may only be
         prepaid on three Business Days' prior written notice to the
         Administrative Agent and any prepayment of Eurocurrency Loans will be
         subject to Section 3.14; (ii) each such partial prepayment of Loans
         shall be in the minimum principal amount of (A) $5,000,000 for
         Revolving Loans, (B) $1,000,000 for Competitive Bid Loans and (C)
         $100,000 for Swing Line Loans, or in the case of Foreign Currency the
         U.S. Dollar Equivalent; and (iii) Competitive Bid Loans and Quoted Rate
         Swing Line Loans may not be prepaid unless a breakage fee equal to the
         amount of actual damages suffered by the Lender whose Competitive Bid
         Loan or Quoted Rate Swing Line Loan is prepaid is paid to such Lender;
         provided that such Lender shall provide the Borrower with the
         calculation of such


                                       36

<PAGE>



         damages. Amounts prepaid hereunder shall be applied as the Borrower may
         elect; provided, that if the Borrower fails to specify a voluntary
         prepayment then such prepayment shall be applied first to Revolving
         Loans that are Base Rate Loans, then to Eurocurrency Loans in direct
         order of Interest Period maturities, then to Swing Line Loans (first to
         those accruing interest at the Base Rate and then at the Quoted Rate)
         and then to Competitive Bid Loans pro rata among all Lenders holding
         same.

                  (b) Mandatory Prepayments. If at any time (i) the sum of
         Revolving Loans outstanding plus Swing Line Loans outstanding plus
         Competitive Bid Loans outstanding plus the aggregate amount of LOC
         Obligations outstanding exceeds the Revolving Committed Amount, (ii)
         the amount of Swing Line Loans outstanding exceeds the Swing Line
         Committed Amount, (iii) the amount of LOC Obligations outstanding
         exceeds the LOC Committed Amount, or (iv) the amount of Revolving Loans
         outstanding in Foreign Currency plus Competitive Bid Loans outstanding
         in Foreign Currency exceeds the U.S. Dollar Equivalent of Fifty Million
         Dollars ($50,000,000), the Borrower shall immediately make a principal
         payment to the Administrative Agent in the manner and in an amount
         necessary to be in compliance with Section 2.1, 2.2, 2.3 or 2.4, as
         applicable.

                  (c) Application of Prepayments. All amounts required to be
         paid pursuant to Section 3.3(b) (i) shall be applied first to Revolving
         Loans (first to Base Rate Loans and then to Eurocurrency Loans in
         direct order of Interest Period maturities), second to Swing Line Loans
         (first to Base Rate Loans and then to Quoted Rate Swing Line Loans),
         third to a cash collateral account in respect of LOC Obligations and
         fourth to Competitive Bid Loans pro rata among the Lenders holding
         same. All prepayments hereunder shall be subject to Section 3.14 as
         well as any breakage fees in connection with a prepayment of a
         Competitive Bid Loan or a Quoted Rate Swing Line Loan.

         3.4      Fees.

                  (a) Facility Fees. In consideration of the Revolving Committed
         Amount being made available by the Lenders hereunder, the Borrower
         agrees to pay to the Administrative Agent, for the pro rata benefit of
         each applicable Lender (based on each Lender's Revolving Loan
         Commitment Percentage of the Revolving Committed Amount), a fee equal
         to the Applicable Percentage for Facility Fees on the Revolving
         Committed Amount (the "Facility Fees"). The accrued Facility Fees shall
         commence to accrue on the Effective Date and shall be due and payable
         in arrears on the first Business Day of each fiscal quarter of the
         Borrower (as well as on the Revolving Loan Maturity Date and on any
         date that the Revolving Committed Amount is reduced) for the
         immediately preceding fiscal quarter (or portion thereof), beginning
         with the first of such dates to occur after the Closing Date.

                  (b)      Letter of Credit Fees.

                  (i) Letter of Credit Fee. In consideration of the issuance of
         Letters of Credit hereunder, the Borrower agrees to pay to the Issuing
         Lender, for the pro rata benefit of the applicable Lenders (based on
         each Lender's Revolving Loan Commitment Percentage of the Revolving
         Committed Amount), a fee (the "Letter of


                                       37

<PAGE>



                  Credit Fee") equal to the Applicable Percentage for the Letter
                  of Credit Fee on the average daily maximum amount available to
                  be drawn under each such Letter of Credit from the date of
                  issuance to the date of expiration. The Letter of Credit Fee
                  will be payable in arrears on the first Business Day of each
                  fiscal quarter of the Borrower (as well as on the Revolving
                  Loan Maturity Date) for the immediately preceding fiscal
                  quarter (or portion thereof), beginning with the first of such
                  dates to occur after the Closing Date.

                                 (ii) Issuing Lender Fees. In addition to the
                  Letter of Credit Fees payable pursuant to subsection (i)
                  above, the Borrower shall pay to the Issuing Lender for its
                  own account, without sharing by the other Lenders, (A) a fee
                  equal to one-eighth of one percent (1/8%) per annum on the
                  total sum of all Letters of Credit issued by the Issuing
                  Lender, such fee to be paid quarterly in arrears 15 days after
                  the end of each fiscal quarter of the Borrower (as well as on
                  the Revolving Loan Maturity Date) and (B) the customary
                  charges from time to time to the Issuing Lender for its
                  services in connection with the issuance, amendment, payment,
                  transfer, administration, cancellation and conversion of, and
                  drawings under, such Letters of Credit (collectively, the
                  "Issuing Lender Fees").

                  (c) Administrative Fees. The Borrower agrees to pay to the
         Administrative Agent, for its own account, an annual fee as agreed to
         between the Borrower and the Administrative Agent in the Fee Letter.

                  (d) Competitive Bid Request Fees. The Borrower agrees to pay
         to the Administrative Agent a Competitive Bid Request Fee as agreed to
         between the Borrower and the Administrative Agent as set forth in the
         Fee Letter.

         3.5 Payment in full at Maturity. On the Revolving Loan Maturity Date,
the entire outstanding principal balance of all Revolving Loans, all Swing Line
Loans, all Competitive Bid Loans and all LOC Obligations then outstanding,
together with accrued but unpaid interest and all other sums owing with respect
thereto, shall be due and payable in full, unless accelerated sooner pursuant to
Section 9.

         3.6      Computations of Interest and Fees.

                  (a) Except for Base Rate Loans, in which case interest shall
         be computed on the basis of a 365 or 366 day year, as applicable, all
         computations of interest and fees hereunder shall be made on the basis
         of the actual number of days elapsed over a year of 360 days. Interest
         shall accrue from and include the date of borrowing (or continuation or
         conversion) but exclude the date of payment.

                  (b) It is the intent of the Lenders and the Credit Parties to
         conform to and contract in strict compliance with applicable usury law
         from time to time in effect. All agreements between the Lenders and the
         Borrower are hereby limited by the provisions of this paragraph which
         shall override and control all such agreements, whether now existing or
         hereafter arising and whether written or oral. In no way, nor in any
         event or contingency (including


                                       38

<PAGE>



         but not limited to prepayment or acceleration of the maturity of any
         obligation), shall the interest taken, reserved, contracted for,
         charged, or received under this Credit Agreement, under the Notes or
         otherwise, exceed the maximum nonusurious amount permissible under
         applicable law. If, from any possible construction of any of the Credit
         Documents or any other document, interest would otherwise be payable in
         excess of the maximum nonusurious amount, any such construction shall
         be subject to the provisions of this paragraph and such documents shall
         be automatically reduced to the maximum nonusurious amount permitted
         under applicable law, without the necessity of execution of any
         amendment or new document. If any Lender shall ever receive anything of
         value which is characterized as interest on the Loans under applicable
         law and which would, apart from this provision, be in excess of the
         maximum lawful amount, an amount equal to the amount which would have
         been excessive interest shall, without penalty, be applied to the
         reduction of the principal amount owing on the Loans and not to the
         payment of interest, or refunded to the Borrower or the other payor
         thereof if and to the extent such amount which would have been
         excessive exceeds such unpaid principal amount of the Loans. The right
         to demand payment of the Loans or any other indebtedness evidenced by
         any of the Credit Documents does not include the right to receive any
         interest which has not otherwise accrued on the date of such demand,
         and the Lenders do not intend to charge or receive any unearned
         interest in the event of such demand. All interest paid or agreed to be
         paid to the Lenders with respect to the Loans shall, to the extent
         permitted by applicable law, be amortized, prorated, allocated, and
         spread throughout the full stated term (including any renewal or
         extension) of the Loans so that the amount of interest on account of
         such indebtedness does not exceed the maximum nonusurious amount
         permitted by applicable law.

                  3.7 Pro Rata Treatment. Except to the extent otherwise
         provided herein:

                  (a) Loans. Each Revolving Loan borrowing (including, without
         limitation, each Mandatory Borrowing), each payment or prepayment of
         principal of any Revolving Loan, each payment of fees (other than the
         Issuing Lender Fees retained by the Issuing Lender for its own account
         and the Administrative Fees and Competitive Bid Request Fees retained
         by the Administrative Agent for its own account), each reduction of the
         Revolving Committed Amount, and each conversion or continuation of any
         Revolving Loan, shall (except as otherwise provided in Section 3.11) be
         allocated pro rata among the relevant Lenders in accordance with the
         respective Revolving Loan Commitment Percentages of such Lenders (or,
         if the Commitments of such Lenders have expired or been terminated, in
         accordance with the respective principal amounts of the outstanding
         Revolving Loans and Participation Interests of such Lenders); provided
         that, if any Lender shall have failed to pay its applicable pro rata
         share of any Revolving Loan, then any amount to which such Lender would
         otherwise be entitled pursuant to this subsection (a) shall instead be
         payable to the Administrative Agent until the share of such Revolving
         Loan not funded by such Lender has been repaid; provided further, that
         in the event any amount paid to any Lender pursuant to this subsection
         (a) is rescinded or must otherwise be returned by the Administrative
         Agent, each Lender shall, upon the request of the Administrative Agent,
         repay to the Administrative Agent the amount so paid to such Lender,
         with interest for the period commencing on the date such payment is
         returned by the Administrative Agent until the date the Administrative
         Agent receives such repayment at a rate per annum equal to, during the
         period to but


                                       39

<PAGE>



         excluding the date two Business Days after such request, the Federal
         Funds Rate, and thereafter, the Base Rate plus two percent (2%) per
         annum; and

                  (b) Letters of Credit. Each payment of unreimbursed drawings
         in respect of LOC Obligations shall be allocated to each LOC
         Participant pro rata in accordance with its Revolving Loan Commitment
         Percentage; provided that, if any LOC Participant shall have failed to
         pay its applicable pro rata share of any drawing under any Letter of
         Credit, then any amount to which such LOC Participant would otherwise
         be entitled pursuant to this subsection (b) shall instead be payable to
         the Issuing Lender until the share of such unreimbursed drawing not
         funded by such Lender has been repaid; provided further, that in the
         event any amount paid to any LOC Participant pursuant to this
         subsection (b) is rescinded or must otherwise be returned by the
         Issuing Lender, each LOC Participant shall, upon the request of the
         Issuing Lender, repay to the Administrative Agent for the account of
         the Issuing Lender the amount so paid to such LOC Participant, with
         interest for the period commencing on the date such payment is returned
         by the Issuing Lender until the date the Issuing Lender receives such
         repayment at a rate per annum equal to, during the period to but
         excluding the date two Business Days after such request, the Federal
         Funds Rate, and thereafter, the Base Rate plus two percent (2%) per
         annum.

         3.8 Sharing of Payments. The Lenders agree among themselves that,
except to the extent otherwise provided herein, in the event that any Lender
shall obtain payment in respect of any Loan, unreimbursed drawing with respect
to any LOC Obligations or any other obligation owing to such Lender under this
Credit Agreement through the exercise of a right of setoff, banker's lien or
counterclaim, or pursuant to a secured claim under Section 506 of the Bankruptcy
Code or other security or interest arising from, or in lieu of, such secured
claim, received by such Lender under any applicable bankruptcy, insolvency or
other similar law or otherwise, or by any other means, in excess of its pro rata
share of such payment as provided for in this Credit Agreement, such Lender
shall promptly pay in cash or purchase from the other Lenders a participation in
such Loans, LOC Obligations, and other obligations in such amounts, and make
such other adjustments from time to time, as shall be equitable to the end that
all Lenders share such payment in accordance with their respective ratable
shares as provided for in this Credit Agreement. The Lenders further agree among
themselves that if payment to a Lender obtained by such Lender through the
exercise of a right of setoff, banker's lien, counterclaim or other event as
aforesaid shall be rescinded or must otherwise be restored, each Lender which
shall have shared the benefit of such payment shall, by payment in cash or a
repurchase of a participation theretofore sold, return its share of that benefit
(together with its share of any accrued interest payable with respect thereto)
to each Lender whose payment shall have been rescinded or otherwise restored.
The Borrower agrees that any Lender so purchasing such a participation may, to
the fullest extent permitted by law, exercise all rights of payment, including
setoff, banker's lien or counterclaim, with respect to such participation as
fully as if such Lender were a holder of such Loan, LOC Obligation or other
obligation in the amount of such participation. Except as otherwise expressly
provided in this Credit Agreement, if any Lender or an Agent shall fail to remit
to an Agent or any other Lender an amount payable by such Lender or such Agent
to such Agent or such other Lender pursuant to this Credit Agreement on the date
when such amount is due, such payments shall be made together with interest
thereon for each date from the date such amount is due until the date such
amount is paid to such Agent or such other Lender at a rate per annum equal to
the Federal Funds Rate. If under any applicable bankruptcy, insolvency or other


                                       40

<PAGE>



similar law, any Lender receives a secured claim in lieu of a setoff to which
this Section 3.8 applies, such Lender shall, to the extent practicable, exercise
its rights in respect of such secured claim in a manner consistent with the
rights of the Lenders under this Section 3.8 to share in the benefits of any
recovery on such secured claim.

         3.9 Capital Adequacy. If, after the date hereof, any Lender has
determined that the adoption or the becoming effective of, or any change in, or
any change by any Governmental Authority, central bank or comparable agency
charged with the interpretation or administration thereof in the interpretation
or administration of, any applicable law, rule or regulation regarding capital
adequacy, or compliance by such Lender, or its parent corporation, with any
request or directive regarding capital adequacy (whether or not having the force
of law) of any such authority, central bank or comparable agency, has or would
have the effect of reducing the rate of return on such Lender's (or parent
corporation's) capital or assets as a consequence of its commitments or
obligations hereunder to a level below that which such Lender, or its parent
corporation, could have achieved but for such adoption, effectiveness, change or
compliance (taking into consideration such Lender's (or parent corporation's)
policies with respect to capital adequacy), then, within 30 days following
written notice from such Lender to the Borrower (such notice setting forth the
amount necessary to compensate such Lender and identifying in reasonable detail
the basis for the calculation of such amount and taking into account applicable
deductions and credits in respect of the amount indemnified), the Borrower shall
be obligated to pay to such Lender such additional amount or amounts as will
compensate such Lender on an after-tax basis (after taking into account
applicable deductions and credits in respect of the amount indemnified) for such
reduction. Each determination by any such Lender of amounts owing under this
Section shall, absent manifest error, be conclusive and binding on the parties
hereto. This covenant shall survive the termination of this Credit Agreement and
the payment of the Loans and all other amounts payable hereunder. Each Lender
agrees not to give any such notice or demand any such payment with respect to
any such determinations at a time more than six months after the period as to
which the Lender has made such determinations. The Borrower shall not be
obligated to compensate any Lender for any such reductions if the Borrower shall
have received such demand from such Lender later than the time provided in the
preceding sentence. Each Lender agrees to make all reasonable efforts to avoid
or minimize the amount of any demand for payment under this Section 3.9,
including exercising all reasonable efforts to change its lending office or to
transfer its affected Loans to an Affiliate; provided, however, that no Lender
shall be required by this sentence to effect any change or transfer which would
have a materially adverse effect on such Lender's results of operations or
financial condition. Notwithstanding the foregoing, no Lender shall be entitled
to request compensation under this Section 3.9 with respect to any Eurocurrency
Competitive Loan if said Lender shall have been aware of the charge giving rise
to such request at the time of submission of the related Eurocurrency
Competitive Loan.


         3.10 Inability To Determine Eurocurrency Rate or Make Loans in Foreign
Currency. If the Administrative Agent shall have determined in good faith (which
determination shall be conclusive and binding upon the Borrower) that, (a) by
reason of circumstances affecting the relevant market, adequate and reasonable
means do not exist for ascertaining the Eurocurrency Rate or (b) Loans cannot be
made in a Foreign Currency, the Administrative Agent shall give telecopy or
telephonic notice thereof to the Borrower and the Lenders as soon as practicable
thereafter, and


                                       41

<PAGE>



will also give prompt written notice to the Borrower when such conditions no
longer exist. If such notice is given in connection with (a) above (i) any
Eurocurrency Loans requested to be made on the first day of such Interest Period
shall be made as Base Rate Loans, (ii) any Loans that were to have been
converted on the first day of such Interest Period to or continued as
Eurocurrency Loans shall be converted to or continued as Base Rate Loans and
(iii) any outstanding Eurocurrency Loans shall be converted, on the first day of
such Interest Period, to Base Rate Loans. Until such notice has been withdrawn
by the Administrative Agent, no further Eurocurrency Loans shall be made or
continued as such, nor shall the Borrower have the right to convert Base Rate
Loans to Eurocurrency Loans. If such notice is given in connection with (b)
above, any request for a Loan in such Foreign Currency shall be a request for
such loan to be made in Dollars.

         3.11 Illegality. Notwithstanding any other provision herein, if the
adoption of or any change in any Requirement of Law or in the interpretation or
application thereof occurring after the Closing Date shall make it unlawful for
any Lender to make or maintain Eurocurrency Loans as contemplated by this Credit
Agreement, (a) such Lender shall promptly give written notice of such
circumstances to the Borrower and the Administrative Agent (which notice shall
be withdrawn whenever such circumstances no longer exist), (b) the commitment of
such Lender hereunder to make Eurocurrency Loans, continue Eurocurrency Loans as
such and convert a Base Rate Loan to Eurocurrency Loans shall forthwith be
canceled and, until such time as it shall no longer be unlawful for such Lender
to make or maintain Eurocurrency Loans, such Lender shall then have a commitment
only to make a Base Rate Loan when a Eurocurrency Loan is requested and (c) such
Lender's Loans then outstanding as Eurocurrency Loans, if any, shall be
converted automatically to Base Rate Loans on the respective last days or the
then current Interest Periods with respect to such Loans or within such earlier
period as required by law. If any such conversion of a Eurocurrency Loan occurs
on a day which is not the last day of the then current Interest Period with
respect thereto, the Borrower shall pay to such Lender such amounts, if any, as
may be required pursuant to Section 3.14.

         3.12 Requirements of Law. If, after the Closing Date, the adoption of
or any change in any Requirement of Law or in the interpretation or application
thereof applicable to any Lender, or compliance by any Lender with any request
or directive (whether or not having the force of law) from any central bank or
other Governmental Authority, in each case made subsequent to the Closing Date
(or, if later, the date on which such Lender becomes a Lender):

                  (a) shall change the basis of taxation of payments to such
         Lender of the principal of or interest on any Loan made by such Lender
         or any fees or other amounts payable to such Lender hereunder (except
         for Non-Excluded Taxes covered by Section 3.13 (including Non- Excluded
         Taxes imposed solely by reason of any failure of such Lender to comply
         with its obligations under Section 3.13(b)) and changes in taxes
         measured by or imposed upon the overall net income, or franchise tax,
         gross receipt taxes, branch taxes, taxes on doing business or taxes on
         the overall net worth of such Lender or its applicable lending office,
         branch, or any affiliate thereof);

                  (b) shall impose, modify or hold applicable any reserve,
         special deposit, compulsory loan or similar requirement against assets
         held by, deposits or other liabilities in or for the account of,
         advances, loans or other extensions of credit by, or any other


                                       42

<PAGE>



         acquisition of funds by, any office of such Lender which is not
         otherwise included in the determination of the Eurocurrency Rate
         hereunder; or

                  (c) shall impose on such Lender any other condition (excluding
         any tax of any kind whatsoever);

and the result of any of the foregoing is to increase the cost to such Lender,
by an amount which such Lender reasonably deems to be material, of making,
converting into, continuing or maintaining Eurocurrency Loans or issuing or
participating in Letters of Credit or making Loans in a Foreign Currency or to
reduce any amount receivable hereunder in respect thereof, then, in any such
case, upon notice to the Borrower from such Lender, through the Administrative
Agent, in accordance herewith, the Borrower shall be obligated to promptly pay
such Lender, upon its demand, any additional amounts necessary to compensate
such Lender on an after-tax basis (after taking into account applicable
deductions and credits in respect of the amount indemnified) for such increased
cost or reduced amount receivable, provided that, in any such case, the Borrower
may elect to convert the Eurocurrency Loans made by such Lender hereunder to
Base Rate Loans by giving the Administrative Agent at least one Business Day's
notice of such election, in which case the Borrower shall promptly pay to such
Lender, upon demand, without duplication, such amounts, if any, as may be
required pursuant to Section 3.14. If any Lender becomes entitled to claim any
additional amounts pursuant to this Section 3.12, it shall provide prompt notice
thereof to the Borrower, through the Administrative Agent, certifying (x) that
one of the events described in this Section 3.12 has occurred and describing in
reasonable detail the nature of such event, (y) as to the increased cost or
reduced amount resulting from such event and (z) as to the additional amount
demanded by such Lender and a reasonably detailed explanation of the calculation
thereof. Such a certificate as to any additional amounts payable pursuant to
this Section 3.12 submitted by such Lender, through the Administrative Agent, to
the Borrower shall be conclusive and binding on the parties hereto in the
absence of manifest error. This covenant shall survive the termination of this
Credit Agreement and the payment of the Loans and all other amounts payable
hereunder. Notwithstanding the foregoing, no Lender shall be entitled to request
compensation under this Section 3.12 with respect to any Eurocurrency
Competitive Loan if said Lender shall have been aware of the charge giving rise
to such request at the time of submission of the related Eurocurrency
Competitive Loan.

         3.13     Taxes.

                  (a) Except as provided below in this Section 3.13, all
         payments made by the Borrower under this Credit Agreement and any Notes
         shall be made free and clear of, and without deduction or withholding
         for or on account of, any present or future income, stamp or other
         taxes, levies, imposts, duties, charges, fees, deductions or
         withholdings, now or hereafter imposed, levied, collected, withheld or
         assessed by any court, or governmental body, agency or other official,
         excluding taxes measured by or imposed upon the overall net income of
         any Lender or its applicable lending office, or any branch or affiliate
         thereof, and all franchise taxes, gross receipts, branch taxes, taxes
         on doing business or taxes on the overall capital or net worth of any
         Lender or its applicable lending office, or any branch or affiliate
         thereof, in each case imposed: (i) by the jurisdiction under the laws
         of which such Lender, applicable lending office, branch or affiliate is
         organized or is located, or in which its principal executive or
         business office is located, or any nation within which such


                                       43

<PAGE>



         jurisdiction is located or any political subdivision thereof; or (ii)
         by reason of any connection between the jurisdiction imposing such tax
         and such Lender, applicable lending office, principal executive or
         business office branch or affiliate other than a connection arising
         solely from such Lender having executed, delivered or performed its
         obligations, or received payment under or enforced, this Credit
         Agreement or any Notes. If any such non-excluded taxes, levies,
         imposts, duties, charges, fees, deductions or withholdings
         ("Non-Excluded Taxes") are required to be withheld from any amounts
         payable to an Agent or any Lender hereunder or under any Notes, (A) the
         amounts so payable to an Agent or such Lender shall be increased to the
         extent necessary to yield to an Agent or such Lender (after payment of
         all Non-Excluded Taxes) interest or any such other amounts payable
         hereunder at the rates or in the amounts specified in this Credit
         Agreement and any Notes, provided, however, that the Borrower shall be
         entitled to deduct and withhold any Non-Excluded Taxes (and other
         applicable taxes) and shall not be required to increase any such
         amounts payable to any Lender that is not organized under the laws of
         the United States of America or a state thereof if such Lender fails to
         comply with the requirements of paragraph (b) (or (h)) of this Section
         3.13 whenever any Non-Excluded Taxes (or other applicable taxes) are
         payable by or otherwise imposed on or collected from the Borrower, and
         (B) as promptly as possible after requested the Borrower shall send to
         such Agent for its own account or for the account of such Lender, as
         the case may be, a certified copy of an original official receipt
         received by the Borrower or, if none is available, other written
         evidence showing payment thereof. If the Borrower fails to pay any
         Non-Excluded Taxes when due to the appropriate taxing authority or
         fails to remit to the Administrative Agent the required receipts or
         other required documentary evidence, the Borrower shall indemnify the
         Agents and any Lender for any incremental taxes, interest or penalties
         that may become payable by an Agent or any Lender as a result of any
         such failure. The agreements in this subsection shall survive the
         termination of this Credit Agreement and the payment of the Loans and
         all other amounts payable hereunder.

                  (b) Each Person which is a Lender that is not incorporated
         under the laws of the United States of America or any state or
         jurisdiction thereof shall:

                            (i) (A) on or before the date on which such Person
                  becomes a Lender hereunder, deliver to the Borrower and the
                  Administrative Agent (x) two duly completed copies of United
                  States Internal Revenue Service Form 1001 or 4224, or
                  successor applicable form, as the case may be, certifying that
                  it is entitled to receive payments under this Credit Agreement
                  and any Notes without deduction or withholding of any United
                  States federal income taxes and (y) an Internal Revenue
                  Service Form W-8 or W-9, or successor applicable form, as the
                  case may be, certifying that it is entitled to an exemption
                  from United States backup withholding tax;

                                    (B) deliver to the Borrower and the
                  Administrative Agent two further copies of any such form or
                  certification on or before the date that any such form or
                  certification expires or becomes obsolete and after the
                  occurrence of any event requiring a change in the most recent
                  form previously delivered by it to the Borrower; and


                                       44

<PAGE>



                                    (C) obtain such extensions of time for
                  filing and complete such forms or certifications as may
                  reasonably be requested by the Borrower or the Administrative
                  Agent; or

                                 (ii) in the case of any such Person that is not
                  a "bank" within the meaning of Section 881(c)(3)(A) of the
                  Internal Revenue Code, on or before the date such Person
                  becomes a Lender hereunder, (A) represent in writing to the
                  Borrower (for the benefit of the Borrower and the Agents) that
                  it is not a bank within the meaning of Section 881(c)(3)(A) of
                  the Internal Revenue Code, (B) deliver to the Borrower, with a
                  copy to the Administrative Agent, two accurate and complete
                  original signed copies of Internal Revenue Service Form W-8,
                  or successor applicable form certifying to such Lender's legal
                  entitlement at the date of such certificate to an exemption
                  from U.S. withholding tax under the provisions of Section
                  881(c) of the Internal Revenue Code with respect to payments
                  to be made under this Credit Agreement and any Notes (and to
                  deliver to the Borrower and the Administrative Agent two
                  further copies of such form on or before the date it expires
                  or becomes obsolete and after the occurrence of any event
                  requiring a change in the most recently provided form and, if
                  necessary, obtain any extensions of time reasonably requested
                  by the Borrower or the Administrative Agent for filing and
                  completing such forms), and (C) agree, to the extent legally
                  entitled to do so, upon reasonable request by the Borrower, to
                  provide to the Borrower (for the benefit of the Borrower and
                  the Agents) such other forms as may be reasonably required in
                  order to establish the legal entitlement of such Lender to an
                  exemption from withholding with respect to payments under this
                  Credit Agreement and any Notes.

         Notwithstanding the above, if any change in treaty, law or regulation
         has occurred after the date such Person becomes a Lender hereunder
         which renders all such forms inapplicable or which would prevent such
         Lender from duly completing and delivering any such form or reasonable
         substitution therefor with respect to it and such Lender so advises the
         Borrower and the Administrative Agent then such Lender shall be exempt
         from such requirements. Each Person that shall become a Lender or a
         participant of a Lender pursuant to Section 11.3 shall, upon the
         effectiveness of the related transfer, be required to provide all of
         the forms, certifications and statements required pursuant to this
         subsection (b); provided that in the case of a participant of a Lender,
         the obligations of such participant of a Lender pursuant to this
         subsection (b) shall be determined as if the participant of a Lender
         were a Lender except that such participant of a Lender shall furnish
         all such required forms, certifications and statements to the Lender
         from which the related participation shall have been purchased and such
         Lender shall provide copies to the Administrative Agent and the
         Borrower.

                  (c) Notwithstanding anything to the contrary in this Credit
         Agreement, the Borrower shall not be required to pay any current or
         future stamp, intangible or documentary taxes or any other excise or
         property taxes, charges or similar levies (including without
         limitation, mortgage recording taxes and similar fees) that arise as a
         result of sales, assignments or other transfers of rights hereunder by
         any Lender.



                                       45

<PAGE>



                  (d) If requested by a Borrower, and at the Borrower's expense,
         any Lender and the Administrative Agent shall take such steps as may be
         appropriate to seek a refund of any Non-Excluded Taxes paid by it and
         shall permit the Borrower to participate in the preparation of any such
         refund claim. If any Lender or the Administrative Agent receives a
         refund in respect of any Non-Excluded Taxes for which the Lender has
         received payment from the Borrower hereunder, any Lender and the
         Administrative Agent, within 15 days of such receipt, shall deliver to
         the Borrower the amount of such refund. In addition, within 15 days of
         a written request of a Borrower, any Lender and the Administrative
         Agent shall execute and deliver to the Borrower such certificates,
         forms or other documents which can be reasonably furnished consistent
         with the facts and which are reasonably necessary to assist the
         Borrower in applying for refunds of Non-Excluded Taxes remitted
         hereunder.

                  (e) If a Borrower is required to pay any amounts pursuant to
         the provisions of this Section 3.13, and if thereafter any Lender or
         the Administrative Agent shall receive or be granted a credit against
         or remission or other relief for any Non-Excluded Taxes payable by the
         Borrower solely in respect of the amounts so paid by the Borrower, such
         Lender shall to the extent that it can do so without prejudice to the
         retention of the amount of such credit, remission or other relief, pay
         to the Borrower promptly after the date on which any Lender or the
         Administrative Agent effectively obtains the benefit of such credit,
         remission or other relief an amount which such Lender reasonably
         determines to be equal to such credit, remission or other relief less
         any sum which the Lender is required by law to deduct therefrom. The
         Lender may, in its reasonable discretion, determine the order of
         utilization of all charges, deductions, credits and expenses.

                  (f) In the event any Lender or the Administrative Agent
         receives written communication from any tax authority with respect to
         an assessment or proposed assessment of any Non-Excluded Taxes, such
         Lender or the Administrative Agent shall promptly notify the Borrower
         in writing and provide a copy of such communication to the Borrower.

                  (g) Each Lender shall use reasonable efforts to avoid or
         minimize any amounts which might otherwise be payable pursuant to this
         Section 3.13, including, upon request of a Borrower, the change of its
         lending office; provided, however, that such efforts shall not include
         the taking of any actions by the Lender that would result in any tax,
         costs or other expense to the Lender (other than a tax, cost or expense
         for which the Lender shall have been reimbursed or indemnified by the
         Borrower pursuant to this Credit Agreement or otherwise) or any action
         which would have a materially adverse effect on such Lenders results of
         operations or financial condition.

                  (h) Each Person which is a Lender that is incorporated under
         the laws of the United States of America or a state thereof shall, on
         or before the date such Person becomes a Lender hereunder, deliver to
         the Borrower and the Administrative Agent an Internal Revenue Service
         Form W-9, or successor applicable form, certifying that it is entitled
         to an exemption from United States backup withholding tax.

                  3.14 Compensation. The Borrower promises to indemnify each
         Lender and to hold each Lender harmless from any loss or expense which
         such Lender may sustain or incur as a consequence


                                       46

<PAGE>



of (a) default by the Borrower in making a borrowing of, conversion into or
continuation of Eurocurrency Loans after the Borrower has given a notice
requesting the same in accordance with the provisions of this Credit Agreement,
(b) default by the Borrower in making any prepayment of a Eurocurrency Loan
after the Borrower has given a notice thereof in accordance with the provisions
of this Credit Agreement and (c) the making of a prepayment of Eurocurrency
Loans on a day which is not the last day of an Interest Period with respect
thereto. Such indemnification may include an amount equal to (i) the amount of
interest which would have accrued on the amount so prepaid, or not so borrowed,
converted or continued, for the period from the date of such prepayment or of
such failure to borrow, convert or continue to the last day of the applicable
Interest Period (or, in the case of a failure to borrow, convert or continue,
the Interest Period that would have commenced on the date of such failure) in
each case at the applicable rate of interest for such Eurocurrency Loans
provided for herein (excluding, however, the Applicable Percentage included
therein, if any) minus (ii) the amount of interest (as reasonably determined by
such Lender) which would have accrued to such Lender on such amount by placing
such amount on deposit for a comparable period with leading banks in the
interbank Eurocurrency market. The agreements in this Section shall survive the
termination of this Credit Agreement and the payment of the Loans and all other
amounts payable hereunder.


                                    SECTION 4

                                    GUARANTY

         4.1 Guaranty of Payment. Subject to Section 4.7 below, each of the
Guarantors hereby, jointly and severally, unconditionally guarantees to each
Lender and the Agents the prompt payment of the Borrower Obligations in full
when due (whether at stated maturity, as a mandatory prepayment, by acceleration
or otherwise). This Guaranty is a guaranty of payment and not of collection and
is a continuing guaranty and shall apply to all Borrower Obligations whenever
arising.

         4.2 Obligations Unconditional. The obligations of the Guarantors
hereunder are absolute and unconditional, irrespective of the value,
genuineness, validity, regularity or enforceability of any of the Credit
Documents or any other agreement or instrument referred to therein, to the
fullest extent permitted by applicable law, irrespective of any other
circumstance whatsoever which might otherwise constitute a legal or equitable
discharge or defense of a surety or guarantor. Each Guarantor agrees that this
Guaranty may be enforced by the Lenders without the necessity at any time of
resorting to or exhausting any other security or collateral and without the
necessity at any time of having recourse to the Notes or any other of the Credit
Documents or any collateral, if any, hereafter securing the Borrower Obligations
or otherwise and each Guarantor hereby waives the right to require the Lenders
to proceed against the Borrower or any other Person (including a co-guarantor)
or to require the Lenders to pursue any other remedy or enforce any other right.
Each Guarantor further agrees that any right of subrogation, indemnity,
reimbursement or contribution it may have against the Borrower or any other
Guarantor of the Borrower Obligations for amounts paid under this Guaranty shall
be subordinated to (and no Guarantor shall assert same unless and until) the
repayment in full of all Loans, all reimbursement obligations under Letters of
Credit, all interest thereon, and all fees until 100 days after the date on
which all Commitments and Letters of Credit have been terminated and all Loans,
LOC Obligations, interest, and fees have been paid in full. Each


                                       47

<PAGE>



Guarantor further agrees that nothing contained herein shall prevent the Lenders
from suing on the Notes or any of the other Credit Documents or foreclosing its
security interest in or Lien on any collateral, if any, securing the Borrower
Obligations or from exercising any other rights available to it under this
Credit Agreement, the Notes, any other of the Credit Documents, or any other
instrument of security, if any, and the exercise of any of the aforesaid rights
and the completion of any foreclosure proceedings shall not constitute a
discharge of any Guarantor's obligations hereunder; it being the purpose and
intent of each Guarantor that its obligations hereunder shall be absolute,
independent and unconditional under any and all circumstances. Neither any
Guarantor's obligations under this Guaranty nor any remedy for the enforcement
thereof shall be impaired, modified, changed or released in any manner
whatsoever by an impairment, modification, change, release or limitation of the
liability of the Borrower or by reason of the bankruptcy or insolvency of the
Borrower. Each Guarantor waives any and all notice of the creation, renewal,
extension or accrual of any of the Borrower Obligations and notice of or proof
of reliance of by any Agent or any Lender upon this Guarantee or acceptance of
this Guarantee. The Borrower Obligations, and any of them, shall conclusively be
deemed to have been created, contracted or incurred, or renewed, extended,
amended or waived, in reliance upon this Guarantee. All dealings between the
Borrower and any of the Guarantors, on the one hand, and the Agents and the
Lenders, on the other hand, likewise shall be conclusively presumed to have been
had or consummated in reliance upon this Guarantee.

         4.3 Modifications. Each Guarantor agrees that (a) all or any part of
the security now or hereafter held for the Borrower Obligations, if any, may be
exchanged, compromised or surrendered from time to time; (b) the Lenders shall
not have any obligation to protect, perfect, secure or insure any such security
interests, liens or encumbrances now or hereafter held, if any, for the Borrower
Obligations or the properties subject thereto; (c) the time or place of payment
of the Borrower Obligations may be changed or extended, in whole or in part, to
a time certain or otherwise, and may be renewed or accelerated, in whole or in
part; (d) the Borrower and any other party liable for payment under the Credit
Documents may be granted indulgences generally or be released; (e) any of the
provisions of the Notes or any of the other Credit Documents may be modified,
amended or waived in accordance with Section 11.6; and (f) any deposit balance
for the credit of the Borrower or any other party liable for the payment of the
Borrower Obligations or liable upon any security therefor may be released, in
whole or in part, at, before or after the stated, extended or accelerated
maturity of the Borrower Obligations, all without notice to or further assent by
such Guarantor, which shall remain bound thereon, notwithstanding any such
exchange, compromise, surrender, extension, renewal, acceleration, modification,
indulgence or release.

         4.4 Waiver of Rights. Each Guarantor expressly waives to the fullest
extent permitted by applicable law: (a) notice of acceptance of this Guaranty by
the Lenders and of all extensions of credit to the Borrower by the Lenders; (b)
presentment and demand for payment or performance of any of the Borrower
Obligations; (c) protest and notice of dishonor or of default (except as
specifically required in the Credit Agreement) with respect to the Borrower
Obligations or with respect to any security therefor; (d) notice of the Lenders
obtaining, amending, substituting for, releasing, waiving or modifying any
security interest, lien or encumbrance, if any, hereafter securing the Borrower
Obligations, or the Lenders' subordinating, compromising, discharging or
releasing such security interests, liens or encumbrances, if any; (e) all other
notices to which such Guarantor might otherwise be entitled; and (f) demand for
payment under this Guaranty.


                                       48

<PAGE>



         4.5 Reinstatement. The obligations of the Guarantors under this Section
4 shall be automatically reinstated if and to the extent that, on or before 100
days following the date on which all Commitments and Letters of Credit have been
terminated, and all Loans, LOC Obligations, interest and fees have been paid,
for any reason any payment by or on behalf of any Person in respect of the
Credit Party Obligations is rescinded or must be otherwise restored by any
holder of any of the Credit Party Obligations, whether as a result of any
proceedings in bankruptcy or reorganization or otherwise, and each Guarantor
agrees that it will indemnify the Agents and each Lender on demand for all
reasonable costs and expenses (including, without limitation, reasonable fees of
counsel) incurred by an Agent or such Lender in connection with such rescission
or restoration, including any such costs and expenses incurred in defending
against any claim alleging that such payment constituted a preference,
fraudulent transfer or similar payment under any bankruptcy, insolvency or
similar law.

         4.6 Remedies. The Guarantors agree that, as between the Guarantors, on
the one hand, and the Agents and the Lenders, on the other hand, the Credit
Party Obligations may be declared to be forthwith due and payable as provided in
Section 9 (and shall be deemed to have become automatically due and payable in
the circumstances provided in Section 9) notwithstanding any stay, injunction or
other prohibition preventing such declaration (or preventing such Credit Party
Obligations from becoming automatically due and payable) as against any other
Person (including any other Guarantor) and that, in the event of such
declaration (or such Credit Party Obligations being deemed to have become
automatically due and payable), such Credit Party Obligations (whether or not
due and payable by any other Person) shall forthwith become due and payable by
the Guarantors.

         4.7      Limitation of Guaranty.

                  (a) Each Guarantor and by its acceptance of hereof, the Agents
         and each other Lender, hereby confirms that it is the intention of all
         such parties that this Section 4 not constitute a fraudulent transfer
         or conveyance for purposes of the Bankruptcy Code, the Uniform
         Fraudulent Conveyance Act, the Uniform Fraudulent Transfer Act or any
         similar federal or state law to the extent applicable to this Section
         4. To effectuate the foregoing intention, the Agents, the other Lenders
         and the Guarantors hereby irrevocably agree that the obligations of
         each Guarantor and such Guarantor's Subsidiaries under this Section 4
         and, without duplication, under any Collateral Document and any other
         Credit Document to which such Guarantor is a party, shall not, in the
         aggregate, exceed the greater of (i) the net benefit realized by such
         Guarantor or any such Subsidiary from the proceeds of the Loans made
         from time to time by the Borrower to the Guarantor or any Subsidiary of
         the Guarantor and (ii) 95% of the Adjusted Net Assets of such Guarantor
         from time to time following the Closing Date (or, if such Guarantor has
         executed and delivered a Joinder Agreement, the date of execution of
         such Joinder Agreement). "Adjusted Net Assets" of any Guarantor with
         respect to any payment by such Guarantor at any date means the lesser
         of (x) the amount by which the fair value of the property of the
         Guarantor at such date (including, without limitation, goodwill and the
         rights and property of such Guarantor incurred pursuant to Section 4.8
         in conjunction with prior payments under this Section 4) exceeds the
         total amount of liabilities (including, without limitation, contingent
         liabilities and, in conjunction with prior payments made under this
         Section 4, liabilities incurred by such Guarantor


                                       49

<PAGE>



         pursuant to Section 4.8, but excluding all other liabilities under this
         Section 4) of the Guarantor at such date and (y) the amount by which
         the present fair salable value of the assets of the Guarantor at such
         date (including, without limitation, goodwill and the rights and
         property of such Guarantor incurred pursuant to Section 4.8 in
         conjunction with prior payments under this Section 4) exceeds the
         amount that will be required to pay the probable liability of the
         Guarantor on its debts (including liabilities incurred by such
         Guarantor pursuant to Section 4.8 in conjunction with prior payments
         under this Section 4 but excluding all other debt in respect of this
         Section 4), as they become absolute and matured.

                  (b) Notwithstanding any provision to the contrary contained
         herein or in any of the other Credit Documents, to the extent the
         obligations of any Guarantor shall be adjudicated to be invalid or
         unenforceable for any reason (including, without limitation, because of
         any applicable state or federal law relating to fraudulent conveyances
         or transfers) then the obligations of such Guarantor hereunder shall be
         limited to the maximum amount that is permissible under applicable law
         (whether federal or state and including, without limitation, the
         Bankruptcy Code).

         4.8 Rights of Contribution. The Guarantors hereby agree, as among
themselves, that if any Guarantor shall become an Excess Funding Guarantor (as
defined below), each other Guarantor shall, on demand of such Excess Funding
Guarantor (but subject to the next sentence hereof), pay to such Excess Funding
Guarantor an amount equal to such Guarantor's Pro Rata Share (as defined below
and determined, for this purpose, without reference to the properties, assets,
liabilities and debts of such Excess Funding Guarantor) of such Excess Payment
(as defined below). The payment obligation of any Guarantor to any Excess
Funding Guarantor under this Section 4.8 shall be subordinate and subject in
right of payment to the prior payment in full of the obligations of such
Guarantor to the extent and until such time as set forth in the third sentence
of Section 4.2, and until such time such Excess Funding Guarantor shall not
exercise any right or remedy with respect to such excess. For purposes hereof,
(i) "Excess Funding Guarantor" shall mean, in respect of any obligations arising
under the other provisions of this Section 4 (hereafter, the "Guaranteed
Obligations"), a Guarantor that has made an Excess Payment; (ii) "Excess
Payment" shall mean, in respect of any Guaranteed Obligations, the amount paid
by a Guarantor in excess of the sum of (A) the lesser of its Pro Rata Share of
such Guaranteed Obligations and the maximum amount that such Guarantor is
required to pay in respect of such obligations pursuant to Section 4.7; and (B)
the aggregate amount of payments made by Borrower to such Guarantor in respect
of such Guaranteed Obligations in accordance with the third sentence of Section
4.2 and (iii) "Pro Rata Share", in respect of any determination for the purposes
of this Section 4.8, shall mean, for any Guarantor, the ratio (expressed as a
percentage) of (a) the amount by which the aggregate present fair saleable value
of all of its assets and properties exceeds the amount of all debts and
liabilities of such Guarantor (including contingent, subordinated, unmatured,
and unliquidated liabilities, but excluding the obligations of such Guarantor
hereunder) to (b) the amount by which the aggregate present fair saleable value
of all assets and other properties of the Borrower and all of the Guarantors
exceeds the amount of all of the debts and liabilities (including contingent,
subordinated, unmatured, and unliquidated liabilities, but excluding the
obligations of the Borrower and the Guarantors hereunder) of the Borrower and
all of the Guarantors, all as of the time of such determination.




                                       50

<PAGE>



                                    SECTION 5

                              CONDITIONS PRECEDENT

         5.1 Closing Conditions. The obligation of the Lenders to enter into
this Credit Agreement and make the initial Extension of Credit is subject to
satisfaction of the following conditions:

                  (a) Executed Credit Documents. Receipt by the Agents of duly
         executed copies of each of the following required to be effective on
         the Effective Date: (i) this Credit Agreement; (ii) the Notes, (iii)
         the Collateral Documents and (iv) all other Credit Documents, each in
         form and substance reasonably acceptable to the Agents in their sole
         discretion.

                  (b) Corporate and Partnership Documents. Receipt by the Agents
         of the following:

                                  (i) Charter Documents. Either (A) copies of
                  the articles or certificates of incorporation or other charter
                  documents of each Credit Party that is a corporation certified
                  to be true and complete as of a recent date by the appropriate
                  Governmental Authority of the state or other jurisdiction of
                  its incorporation and certified by a secretary or assistant
                  secretary of such Credit Party to be true and correct as of
                  the Effective Date or (B) a copy of the partnership agreement
                  of each Credit Party that is a partnership certified by its
                  general partner to be true and correct.

                                 (ii) Bylaws. A copy of the bylaws of each
                  Credit Party that is a corporation certified by a secretary or
                  assistant secretary of such Credit Party to be true and
                  correct as of the Effective Date.

                                (iii) Resolutions. Copies of resolutions of the
                  Board of Directors of each Credit Party (or its general
                  partner, as applicable) approving and adopting such Credit
                  Documents to which it is a party, the transactions
                  contemplated therein and authorizing execution and delivery
                  thereof, certified by a secretary or assistant secretary of
                  such Credit Party (or its general partner, as applicable) to
                  be true and correct and in force and effect as of the
                  Effective Date.

                                 (iv) Good Standing. Copies of (A) certificates
                  of good standing, existence or its equivalent, as applicable,
                  with respect to each Credit Party (and its general partner, as
                  applicable) certified as of a recent date by the appropriate
                  Governmental Authorities of the state or other jurisdiction of
                  incorporation and each other jurisdiction in which the failure
                  to so qualify and be in good standing would have a Material
                  Adverse Effect on the business or operations of a Credit Party
                  in such jurisdiction and (B) to the extent available, a
                  certificate indicating payment of all corporate franchise
                  taxes certified as of a recent date by the appropriate
                  governmental taxing authorities.



                                       51

<PAGE>



                                  (v) Incumbency. An incumbency certificate of
                  each Credit Party (or its general partner, as applicable)
                  certified by a secretary or assistant secretary to be true and
                  correct as of the Effective Date.

                  (c) Financial Statements. Receipt by the Agents of (i) the
         consolidated financial statements of the Credit Parties for fiscal
         years 1994 and 1995, including balance sheets and income and cash flow
         statements audited by an independent public accounting firm acceptable
         to the Agents and containing an unqualified opinion of such firm that
         such statements present fairly, in all material respects, the
         consolidated financial condition and results of operations of the
         Credit Parties, and are prepared in conformity with GAAP, and (ii) pro
         forma financial statements for the immediate succeeding five fiscal
         years.

                  (d) Opinion of Counsel. Receipt by the Agents of an opinion,
         or opinions (which shall cover, among other things, authority,
         legality, validity, binding effect and enforceability), reasonably
         satisfactory to the Agents, addressed to the Agents on behalf of the
         Lenders and dated as of the Effective Date, from legal counsel to the
         Credit Parties.

                  (e) Spin-Off. The Agents shall have received in connection
         with the spin-off of the Borrower from Corning Clinical Laboratories
         Inc., a Delaware corporation (the "Spin- Off") a copy of the IRS
         Private Letter Ruling issued to Corning Incorporated addressing the tax
         treatment of the Spin-Off.

                  (f) Consents and Approvals. The Borrower shall receive all
         governmental, shareholder and third party consents and approvals
         necessary in connection with the Spin- Off.

                  (g) Expiration of Waiting Periods. The Borrower and its
         Subsidiaries shall confirm the expiration of all applicable waiting
         periods, without any action being taken by any authority (i) in
         connection with the Spin-Off, and (ii) to the extent it would restrain,
         prevent or impose any material adverse conditions on the Borrower or
         any of its Subsidiaries.

                  (h) Due Diligence. The completion of all due diligence with
         respect to the Credit Parties and their Subsidiaries in scope and
         determination satisfactory to the Agents in their reasonable
         discretion, including, without limitation, historical financial
         information, litigation, tax, accounting, labor, insurance, pension
         liabilities (actual or contingent) real estate leases, material
         contracts, debt agreements, property ownership and contingent
         liabilities.

                  (i) Liens. The Agents shall have received evidence
         satisfactory to the Agents that no Liens are in effect except for
         Permitted Liens.

                  (j) Evidence of Insurance. Receipt by the Agents of copies of
         insurance policies or certificates of insurance of the Credit Parties
         evidencing liability and casualty insurance meeting the requirements
         set forth in the Credit Documents.



                                       52

<PAGE>



                  (k) Material Adverse Effect. There shall not have occurred a
         change since December 31, 1995 that has had or could reasonably be
         expected to have a Material Adverse Effect.

                  (l) Litigation. Except as disclosed on Schedule 6.11, there
         shall not exist any pending or threatened action, suit, investigation
         or proceeding pending or threatened in any court or before any
         arbitrator or governmental authority against a Credit Party or any of
         their Subsidiaries that would have or would reasonably be expected to
         have a Material Adverse Effect.

                  (m) Officer's Certificates. The Agents shall have received a
         certificate or certificates executed by the chief financial officer of
         the Borrower on behalf of the Borrower as of the Effective Date stating
         that (i) the Borrower and each of the Borrower's Subsidiaries are in
         compliance with all existing material financial obligations, (ii) no
         action, suit, investigation or proceeding is pending or threatened in
         any court or before any arbitrator or governmental instrumentality that
         purports to effect the Borrower, any of the Borrower's Subsidiaries or
         any transaction contemplated by the Credit Documents, if such action,
         suit, investigation or proceeding would have or would be reasonably
         expected to have a Material Adverse Effect, (iii) the financial
         statements and information delivered pursuant to Section 5.1(c) were
         prepared in good faith and using reasonable assumptions and (iv)
         immediately after giving effect to this Credit Agreement, the other
         Credit Documents and all the transactions contemplated therein to occur
         on such date, (A) each Credit Party is Solvent, (B) no Default or Event
         of Default has occurred and is continuing, (C) all representations and
         warranties contained herein and in the other Credit Documents are true
         and correct in all material respects, and (D) the Borrower is in
         compliance with each of the financial covenants set forth in Section
         7.2.

                  (n) Existing Financial Obligations. The Borrower and its
         Subsidiaries shall be in compliance with all existing financial
         obligations in all material respects.

                  (o) Disruption of Financial Markets. The absence of any
         disruption or adverse change in the financial or capital markets
         generally which the Agents, in their sole discretion, deem material in
         connection with the syndication of the credit facility evidenced by
         this Credit Agreement.

                  (p) Fees and Expenses. Payment by the Credit Parties of all
         fees and expenses owed by them to the Lenders and the Agents,
         including, without limitation, payment to the Agents of the fees set
         forth in the Fee Letter.

                  (q) Collateral. Receipt by the Administrative Agent of (i) all
         stock certificates or other instruments evidencing the Voting Stock
         pledged pursuant to a Pledge Agreement, together with duly executed in
         blank stock powers attached thereto and (ii) all promissory notes
         evidencing loans from Credit Parties to Non-Material Domestic
         Subsidiaries together with duly executed endorsements attached thereto.



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<PAGE>



                  (r) Other. Receipt by the Agents of such other documents,
         instruments, agreements or information as reasonably and timely
         requested by an Agent.

         5.2 Conditions to All Extensions of Credit. In addition to the
conditions precedent stated elsewhere herein, the Lenders shall not be obligated
to make, continue or convert Loans nor shall the Issuing Lender be required to
issue or extend a Letter of Credit unless:

                  (a) Notice. The Borrower shall have delivered (i) in the case
         of any new Revolving Loan, a Notice of Borrowing, duly executed and
         completed, by the time specified in Section 2.1, (ii) in the case of
         any Letter of Credit, the Issuing Lender shall have received an
         appropriate request for issuance in accordance with the provisions of
         Section 2.2, (iii) in the case of any Swing Line Loan, a Swing Line
         Loan Request, duly executed and completed, by the time specified in
         Section 2.4, (iv) in the case of any Competitive Bid Loans, a
         Competitive Bid Loan Request, duly executed and completed, by the time
         specified in Section 2.3 and (v) in the case of any continuation or
         conversion of an existing Loan, a Notice of Continuation/Conversion by
         the time specified in Section 2.1(e);

                  (b) Representations and Warranties. If the Borrower is
         requesting (i) a new Loan (as opposed to a continuation or conversion
         of an existing Loan) or (ii) the issuance of a Letter of Credit, the
         representations and warranties made in the Credit Documents are true
         and correct in all material respects at and as if made as of such date
         except to the extent they expressly relate to an earlier date;

                  (c) No Default. No Default or Event of Default shall exist or
         be continuing either prior to or after giving effect thereto;

                  (d) Availability. Immediately after giving effect to the
         making of a Revolving Loan (and the application of the proceeds
         thereof) or to the issuance of a Letter of Credit, as the case may be,
         the sum of the Revolving Loans outstanding plus LOC Obligations
         outstanding plus Swing Line Loans outstanding plus Competitive Bid
         Loans outstanding shall not exceed the Revolving Committed Amount.

The delivery of each Notice of Borrowing and each request for a Letter of Credit
shall constitute a representation and warranty by the Borrower of the
correctness of the matters specified in subsections (b), (c) and (d) above and
the delivery of each Notice of Continuation/Conversion shall constitute a
representation and warranty by the Borrower of the correctness of the matters
specified in subsections (c) and (d) above.




                                       54

<PAGE>



                                    SECTION 6

                         REPRESENTATIONS AND WARRANTIES

         The Credit Parties hereby represent to the Agents and each Lender that:

         6.1 Financial Condition. The financial statements delivered to the
Lenders pursuant to Section 5.1(c)(i) and Section 7.1(a) and (b): (a) have been
prepared in accordance with GAAP and (b) present fairly the consolidated
financial condition, results of operations and cash flows of the Credit Parties
and their Subsidiaries as of such date and for such periods.

         6.2 No Material Change. Except as set forth on Schedule 6.2, since
December 31, 1995, there has been no development or event relating to or
affecting a Credit Party or any of their Subsidiaries which has had or would be
reasonably expected to have a Material Adverse Effect.

         6.3 Organization and Good Standing. Each Credit Party and each of its
Material Subsidiaries (a) is either a corporation duly incorporated or a
partnership duly formed, validly existing and in good standing under the laws of
the State (or other jurisdiction) of its incorporation or formation, as the case
may be, (b) is duly qualified and in good standing as a foreign corporation or
foreign partnership and is authorized to do business in every jurisdiction where
it does business unless the failure to be so qualified, in good standing or
authorized would not have or would not be reasonably expected to have a Material
Adverse Effect and (c) has the requisite corporate or partnership power and
authority to own its properties and to carry on its business as now conducted
and as proposed to be conducted.

         6.4 Due Authorization. Each Credit Party (a) has the requisite
corporate or partnership power and authority to execute, deliver and perform
this Credit Agreement and the other Credit Documents to which it is a party and
to incur the obligations herein and therein provided for and (b) is duly
authorized to, and has been authorized by all necessary corporate or partnership
action, to execute, deliver and perform this Credit Agreement and the other
Credit Documents to which it is a party.

         6.5 No Conflicts. Neither the execution and delivery of the Credit
Documents, nor the consummation of the transactions contemplated therein, nor
performance of and compliance with the terms and provisions thereof by such
Credit Party will (a) violate or conflict with any provision of its articles or
certificate of incorporation or bylaws, (b) violate, contravene or materially
conflict with any Requirement of Law or any other law, regulation (including,
without limitation, Regulation U or Regulation X), order, writ, judgment,
injunction, decree or permit applicable to it, if the result thereof could cause
or be reasonably expected to cause a Material Adverse Effect, (c) violate,
contravene or conflict with contractual provisions of, or cause an event of
default under, any indenture, loan agreement, mortgage, deed of trust, contract
or other agreement or instrument to which it is a party or by which it may be
bound, if the result thereof could cause or be reasonably expected to cause a
Material Adverse Effect, or (d) result in or require the creation of any Lien
upon or with respect to its properties.



                                       55

<PAGE>



         6.6 Consents. Except for consents, approvals and authorizations which
have been obtained, no consent, approval, authorization or order of, or filing,
registration or qualification with, any court or Governmental Authority or third
party in respect of any Credit Party is required in connection with the
execution, delivery or performance of this Credit Agreement or any of the other
Credit Documents by such Credit Party.

         6.7 Enforceable Obligations. This Credit Agreement and the other Credit
Documents have been duly executed and delivered and constitute legal, valid and
binding obligations of each Credit Party thereto enforceable against such Credit
Party in accordance with their respective terms, except as may be limited by
bankruptcy or insolvency laws or similar laws affecting creditors' rights
generally or by general equitable principles.

         6.8 No Default. No Credit Party, nor any of its Subsidiaries, is in
default under any contract, lease, loan agreement, indenture, mortgage, security
agreement or other agreement or obligation to which it is a party or by which
any of its properties is bound which default would have or would be reasonably
expected to have a Material Adverse Effect.

         6.9 Liens. None of the assets of the Credit Parties, nor any of their
Subsidiaries, is subject to any Lien other than Permitted Liens.

         6.10 Indebtedness. As of the Closing Date, the Credit Parties have no
Indebtedness except (a) as disclosed in the financial statements referenced in
Section 6.1, (b) as set forth on Schedule 6.10 and (c) as otherwise permitted by
this Credit Agreement.

         6.11 Litigation. Except as set forth on Schedule 6.11, there are no
actions, suits or legal, equitable, arbitration or administrative proceedings,
pending or, to the knowledge of any Credit Party, threatened against, the
Borrower or any of its Subsidiaries which could have or might be reasonably
expected to have a Material Adverse Effect.

         6.12 Taxes. Except as set forth on Schedule 6.12, each Credit Party,
and each of its Subsidiaries, has filed, or caused to be filed, all tax returns
(federal, state, local and foreign) required to be filed and paid (a) all
amounts of taxes shown thereon to be due (including interest and penalties) and
(b) all other taxes, fees, assessments and other governmental charges (including
mortgage recording taxes, documentary stamp taxes and intangibles taxes) owing
by it, except for such taxes (i) which are not yet delinquent or (ii) that are
being contested in good faith and by proper proceedings, and against which
adequate reserves are being maintained in accordance with GAAP. No Credit Party
is aware of any proposed tax assessments issued by a taxing authority to and
against such Credit Party, except as would not have or be reasonably expected to
have a Material Adverse Effect.

         6.13 Compliance with Law. Each Credit Party, and each of its
Subsidiaries, is in compliance with all Requirements of Law and all other laws,
rules, regulations, orders and decrees (including without limitation
Environmental Laws) applicable to it, or to its properties, unless such failure
to comply would not have or would not be reasonably expected to have a Material
Adverse Effect.



                                       56

<PAGE>



         6.14 ERISA. Except as set forth on Schedule 6.14 or except as would not
result or be reasonably expected to result in a Material Adverse Effect:

                  (a) During the five-year period prior to the date on which
         this representation is made or deemed made: (i) no Termination Event
         has occurred, and, to the best knowledge of the Credit Parties, no
         event or condition has occurred or exists as a result of which any
         Termination Event could reasonably be expected to occur, with respect
         to any Plan; (ii) no "accumulated funding deficiency," as such term is
         defined in Section 302 of ERISA and Section 412 of the Code, whether or
         not waived, has occurred with respect to any Plan; (iii) each Plan has
         been maintained, operated, and funded in compliance with its own terms
         and in material compliance with the provisions of ERISA, the Code, and
         any other applicable federal or state laws; and (iv) no lien in favor
         or the PBGC or a Plan has arisen or is reasonably likely to arise on
         account of any Plan.

                  (b) The actuarial present value of all "benefit liabilities"
         under each Single Employer Plan (determined within the meaning of
         Section 401(a)(2) of the Code, utilizing the actuarial assumptions used
         to fund such Plans), whether or not vested, did not, as of the last
         annual valuation date prior to the date on which this representation is
         made or deemed made, exceed the current value of the assets of such
         Plan allocable to such accrued liabilities.

                  (c) Neither the Borrower, nor any of its Subsidiaries nor any
         ERISA Affiliate has incurred, or, to the best knowledge of the Credit
         Parties, are reasonably expected to incur, any withdrawal liability
         under ERISA to any Multiemployer Plan or Multiple Employer Plan that
         could have or be reasonably expected to have a Material Adverse Effect.
         Neither the Borrower, any of its Subsidiaries nor any ERISA Affiliate
         has received any notification that any Multiemployer Plan is in
         reorganization (within the meaning of Section 4241 of ERISA), is
         insolvent (within the meaning of Section 4245 of ERISA), or has been
         terminated (within the meaning of Title IV of ERISA), and no
         Multiemployer Plan is, to the best knowledge of the Credit Parties,
         reasonably expected to be in reorganization, insolvent, or terminated.
         For the purposes of this subsection (c), "ERISA Affiliate" means an
         entity, whether or not incorporated, which is under common control with
         any Credit Party or any of its Subsidiaries within the meaning of
         Section 4001(a)(14) of ERISA, or is a member of a group which includes
         any Credit Party or any of its Subsidiaries and which is treated as a
         single employer under Section 414(b), (c), (m), or (o) of the Code.

                  (d) No prohibited transaction (within the meaning of Section
         406 of ERISA or Section 4975 of the Code) or breach of fiduciary
         responsibility has occurred with respect to a Plan which has subjected
         or to the best knowledge of the Borrower is reasonably likely to
         subject the Borrower or any of its Subsidiaries or any ERISA Affiliate
         to any liability under Sections 406, 409, 502(i), or 502(l) of ERISA or
         Section 4975 of the Code, or under any agreement or other instrument
         pursuant to which the Borrower or any of its Subsidiaries or any ERISA
         Affiliate has agreed or is required to indemnify any person against any
         such liability.

                  (e) The present value (determined using actuarial and other
         assumptions which are reasonable with respect to the benefits provided
         and the employees participating) of the


                                       57

<PAGE>



         liability of the Borrower and its Subsidiaries and each ERISA Affiliate
         for post-retirement welfare benefits to be provided to their current
         and former employees under Plans which are welfare benefit plans (as
         defined in Section 3(1) of ERISA), net of all assets under all such
         Plans allocable to such benefits, are reflected on the Financial
         Statements in accordance with FASB 106.

                  (f) Each Plan which is a welfare plan (as defined in Section
         3(1) of ERISA) to which Sections 601-609 of ERISA and Section 4980B of
         the Code apply has been administered in compliance in all material
         respects with such sections.

         6.15 Subsidiaries. As of the Closing Date, set forth on Schedule 6.15
is a complete and accurate list of all Subsidiaries of each Credit Party,
including the jurisdiction of incorporation or organization for each such
Subsidiary and the location of its facilities and whether such Subsidiary is a
Domestic Subsidiary, a Foreign Subsidiary, a First Tier Foreign Subsidiary or a
Material Subsidiary.

         6.16 Use of Proceeds. The proceeds of the Loans hereunder will be used
solely for the purposes specified in Section 7.10. None of the proceeds of the
Loans or other Extensions of Credit will be used in such a manner as to cause a
violation of Regulation U or X or to make an Investment other than a Permitted
Investment. Following application of the proceeds of each Loan and after giving
effect to any Permitted Acquisition, not more than 25 percent of the value of
the assets either (a) of the Borrower only or (b) of the Borrower and its
Subsidiaries on a consolidated basis (to the extent that such assets are subject
to any restriction contained in any agreement or instrument between the Borrower
and any Lender or any Affiliate of any Lender relating to Indebtedness) will be
Margin Stock (as defined in Regulation U).

         6.17 Government Regulation. No Credit Party, nor any of its
Subsidiaries, is subject to regulation under the Public Utility Holding Company
Act of 1935, the Federal Power Act, the Investment Company Act of 1940 or the
Interstate Commerce Act, each as amended. In addition, no Credit Party, nor any
of its Subsidiaries, is (a) an "investment company" registered or required to be
registered under the Investment Company Act of 1940, as amended, or controlled
by such a company, or (b) a "holding company," or a "Subsidiary company" of a
"holding company," or an "affiliate" of a "holding company" or of a "Subsidiary"
of a "holding company," within the meaning of the Public Utility Holding Company
Act of 1935, as amended. No director or executive officer of the Borrower or any
of its Subsidiaries is a director, executive officer or principal shareholder of
any Lender. For the purposes hereof the terms "director", "executive officer"
and "principal shareholder" (when used with reference to any Lender) have the
respective meanings assigned thereto in Regulation O issued by the Board of
Governors of the Federal Reserve System.



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<PAGE>



         6.18     Environmental Matters.

                  Except as disclosed on Schedule 6.18 or except as would not
         have or be reasonably expected to have a Material Adverse Effect:

                                  (i) Each of the real properties owned or
                  leased by the Credit Parties or any of their Subsidiaries (the
                  "Real Properties") and all operations at the Real Properties
                  are in compliance with all applicable Environmental Laws, and
                  there is no violation of any Environmental Law with respect to
                  the Real Properties or the businesses operated by the Borrower
                  or any of their Subsidiaries (the "Businesses"), and there are
                  no conditions relating to the Businesses or Real Properties
                  that would be reasonably expected to give rise to liability
                  under any applicable Environmental Laws.

                                 (ii) No Credit Party has received any written
                  notice of, or written inquiry from any Governmental Authority
                  regarding, any violation, alleged violation, non-compliance,
                  liability or potential liability regarding Hazardous Materials
                  or compliance with Environmental Laws with regard to any of
                  the Real Properties or the Businesses, nor does the Borrower
                  or any of its Subsidiaries have knowledge that any such notice
                  is being threatened.

                                (iii) Hazardous Materials have not been
                  transported or disposed of from the Real Properties, or
                  generated, treated, stored or disposed of at, on or under any
                  of the Real Properties, in each case by, or on behalf or with
                  the permission of, the Borrower or any of its Subsidiaries in
                  a manner that would reasonably be expected to give rise to
                  liability under any applicable Environmental Law.

                                 (iv) No judicial proceeding or governmental or
                  administrative action is pending or, to the knowledge of the
                  Borrower or any of its Subsidiaries, threatened, under any
                  Environmental Law to which the Borrower or any of its
                  Subsidiaries is or will be named as a party, nor are there any
                  consent decrees or other decrees, consent orders,
                  administrative orders or other orders, or other administrative
                  or judicial requirements outstanding under any Environmental
                  Law with respect to the Borrower or any of its Subsidiaries,
                  the Real Properties or the Businesses, in any amount
                  reportable under the federal Comprehensive Environmental
                  Response, Compensation and Liability Act or any analogous
                  state law, except releases in compliance with any
                  Environmental Laws.

                                  (v) There has been no release of Hazardous
                  Materials at or from the Real Properties, or arising from or
                  related to the operations (including, without limitation,
                  disposal) of the Borrower or any of its Subsidiaries in
                  connection with the Real Properties or otherwise in connection
                  with the Businesses.

                                 (vi) None of the Real Properties contains, or 
                  has previously contained, any Hazardous Materials at, on or 
                  under the Real Properties in amounts


                                       59

<PAGE>



                  or concentrations that, if released, constitute or constituted
                  a violation of, or could give rise to liability under,
                  Environmental Laws.

                                (vii) No Credit Party, nor any of its
                  Subsidiaries, has assumed any liability of any Person (other
                  than another Credit Party) under any Environmental Law.

         6.19 Intellectual Property. Each Credit Party, and each of its
Subsidiaries, owns, or has the legal right to use, all trademarks, tradenames,
patents, copyrights, technology, know-how and processes (the "Intellectual
Property") necessary for each of them to conduct its business as currently
conducted except for those the failure to own or have such legal right to use
would not have or be reasonably expected to have a Material Adverse Effect.

         6.20 Investments. All Investments of each Credit Party and each of its
Material Subsidiaries are either Permitted Investments or otherwise permitted by
the terms of this Credit Agreement.

         6.21 Disclosure. To the best of the Borrower's knowledge, when taken
together with all information disclosed or reflected in the Disclosure
Documents, in each case, as amended, modified or supplemented from time to time
prior to the time this representation is made or deemed made by the Borrower, no
written or formally presented information and data concerning the Borrower and
its Subsidiaries (except for financial statements, projections, annual business
plans and budgets and except for information and data published by Persons other
than (a) the Borrower or its Subsidiaries and (b) before the Spin-Off, Corning
Incorporated or its Subsidiaries) which are made available to any Lender in
connection with this Credit Agreement or any other Credit Document contain any
untrue statement of material fact or omit to state a material fact necessary in
order to make the statement therein not materially misleading in light of the
circumstances under which such statements are made.


                                    SECTION 7

                              AFFIRMATIVE COVENANTS

         Each Credit Party hereby covenants and agrees that until all
Commitments and Letters of Credit have been terminated and the Loans and LOC
Obligations, together with interest and fees hereunder, have been paid in full:

         7.1 Information Covenants. The Borrower will furnish, or cause to be
furnished, to the Administrative Agent and each of the Lenders:

                  (a) Annual Financial Statements. As soon as available, and in
         any event within 90 days after the close of each fiscal year of the
         Borrower, a consolidated balance sheet and income statement of the
         Borrower and its Subsidiaries, as of the end of such fiscal year,
         together with related consolidated statements of stockholder's equity
         and of cash flows for such fiscal year, setting forth in comparative
         form consolidated figures for the preceding


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         fiscal year, all such financial information described above to be in
         reasonable form and detail and audited by independent certified public
         accountants of recognized national standing reasonably acceptable to
         the Agents and whose opinion shall be to the effect that such financial
         statements have been prepared in accordance with GAAP (except for
         changes with which such accountants concur) and shall not be limited as
         to the scope of the audit or qualified in any manner.

                  (b) Quarterly Financial Statements. As soon as available, and
         in any event within 60 days after the close of the first three quarters
         of each fiscal year of the Borrower, (i) a consolidated balance sheet
         and income statement of the Borrower and its Subsidiaries, as of the
         end of such fiscal quarter, together with related consolidated
         statements of cash flows for such fiscal quarter in each case setting
         forth in comparative form consolidated figures for the corresponding
         period of the preceding fiscal year, all such financial information
         described above to be in reasonable form and detail and reasonably
         acceptable to the Agents, and accompanied by a certificate of the chief
         financial officer of the Borrower to the effect that such quarterly
         financial statements fairly present in all material respects the
         financial condition of the Borrower and its Subsidiaries and have been
         prepared in accordance with GAAP, subject to changes resulting from
         audit and normal year-end audit adjustments and (ii) a management
         discussion and analysis of operating results for such fiscal quarter.

                  (c) Officer's Certificate. At the time of delivery of the
         financial statements provided for in Sections 7.1(a) and 7.1(b) above,
         a certificate of the chief financial officer of the Borrower
         substantially in the form of Exhibit 7.1(c), (i) demonstrating
         compliance with the financial covenants contained in Section 7.2 by
         calculation thereof as of the end of each such fiscal period, and
         showing the calculation of the Adjusted Leverage Ratio for purposes of
         determining Applicable Percentage, (ii) certifying as to which
         Subsidiaries are Material Subsidiaries and calculating the percentage
         of total assets of the Borrower and its Subsidiaries, on a consolidated
         basis, owned by (x) the Credit Parties and (y) First Tier Foreign
         Subsidiaries in which the Lenders have received a pledge of 65% of
         their Voting Stock, and (iii) stating that no Default or Event of
         Default has occurred and is continuing, or if any Default or Event of
         Default has occurred and is continuing, specifying the nature and
         extent thereof and what action the Borrower proposes to take with
         respect thereto.

                  (d) Auditor's Reports. Promptly upon receipt thereof, a copy
         of any "management letter" submitted by independent accountants to the
         Borrower or any of its Subsidiaries in connection with any annual audit
         of the books of the Borrower or any of its Subsidiaries.

                  (e) Reports. (i) Promptly upon transmission or receipt
         thereof, copies of any filings and registrations with, and reports to
         or from, the Securities and Exchange Commission, or any successor
         agency, and copies of all financial statements, proxy statements,
         notices and reports as the Borrower or any of its Subsidiaries shall
         send to its shareholders generally and (ii) upon the reasonable written
         request of an Agent, all reports and written information to and from
         the United States Environmental Protection Agency, or any state or
         local agency responsible for environmental matters, the United States
         Occupational Health and Safety Administration, or any state or local
         agency responsible for


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         health and safety matters, or any successor agencies or authorities
         concerning environmental, health or safety matters.

                  (f) Notices. Upon the Borrower obtaining knowledge thereof,
         the Borrower will give written notice to the Administrative Agent
         promptly of (i) the occurrence of an event or condition consisting of a
         Default or Event of Default, specifying the nature and existence
         thereof and what action the Borrower proposes to take with respect
         thereto, and (ii) the occurrence of any of the following with respect
         to the Borrower or any of its Subsidiaries (x) the pendency or
         commencement of any litigation, arbitral or governmental proceeding
         against the Borrower or any of its Subsidiaries which if adversely
         determined would have or would be reasonably expected to have a
         Material Adverse Effect, or (y) the institution of any proceedings
         against the Borrower or any of its Subsidiaries with respect to, or the
         receipt of notice by such Person of potential liability or
         responsibility for violation, or alleged violation of any federal,
         state or local law, rule or regulation, including but not limited to,
         Environmental Laws, the liability for the violation of which would have
         or would be reasonably expected to have a Material Adverse Effect.

                  (g) ERISA. Upon any of the Credit Parties or any ERISA
         Affiliate obtaining knowledge thereof, Borrower will give written
         notice to the Administrative Agent and each of the Lenders promptly
         (and in any event within five Business Days) of: (i) any event or
         condition, including, but not limited to, any Reportable Event, that
         constitutes, or might reasonably lead to, a Termination Event; (ii)
         with respect to any Multiemployer Plan, the receipt of notice as
         prescribed in ERISA or otherwise of any withdrawal liability assessed
         against the Borrowers or any of their ERISA Affiliates, or of a
         determination that any Multiemployer Plan is in reorganization or
         insolvent (both within the meaning of Title IV of ERISA); (iii) the
         failure to make full payment on or before the due date (including
         extensions) thereof of all amounts which the Borrower or any of its
         Subsidiaries or ERISA Affiliates is required to contribute to each Plan
         pursuant to its terms and as required to meet the minimum funding
         standard set forth in ERISA and the Code with respect thereto; or (iv)
         any change in the funding status of any Plan that could or could be
         reasonably expected to have a Material Adverse Effect; together, with a
         description of any such event or condition or a copy of any such notice
         and a statement by the principal financial officer of the Borrower
         briefly setting forth the details regarding such event, condition, or
         notice, and the action, if any, which has been or is being taken or is
         proposed to be taken by the Credit Parties with respect thereto.
         Promptly upon request, the Borrower shall furnish the Administrative
         Agent and each of the Lenders with such additional information
         concerning any Plan as may be reasonably requested, including, but not
         limited to, copies of each annual report/return (Form 5500 series), as
         well as all schedules and attachments thereto required to be filed with
         the Department of Labor and/or the Internal Revenue Service pursuant to
         ERISA and the Code, respectively, for each "plan year" (within the
         meaning of Section 3(39) of ERISA).

                  (h)      Environmental.

                  (i) Subsequent to a notice from the Borrower pursuant to
         Section 7.1(f)(ii)(y) or during the existence of an Event of Default,
         and upon the written


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                  request of an Agent, the Borrower will furnish or cause to be
                  furnished to the Administrative Agent, at the Borrower's
                  expense, a report of an environmental assessment of reasonable
                  scope, form and depth, including, where appropriate, invasive
                  soil or groundwater sampling, by a consultant reasonably
                  acceptable to the Agents as to the nature and extent of the
                  presence of any Hazardous Materials on any property owned,
                  leased or operated by a Credit Party and as to the compliance
                  by the Credit Parties with Environmental Laws. If the Borrower
                  fails to deliver such an environmental report within
                  seventy-five (75) days after receipt of such written request
                  then the Agents may arrange for same, and the Borrower hereby
                  grants to the Agents and their representatives access to the
                  Real Properties and a license of a scope reasonably necessary
                  to undertake such an assessment (including, where appropriate,
                  invasive soil or groundwater sampling). The reasonable cost of
                  any assessment arranged for by the Agents pursuant to this
                  provision will be payable by the Borrower on demand and added
                  to the Credit Party Obligations.

                                 (ii) Each Credit Party will conduct and
                  complete all investigations, studies, sampling, and testing
                  and all remedial, removal, and other actions necessary to
                  address all Hazardous Materials on, from, or affecting any
                  Real Property to the extent necessary to be in compliance with
                  all Environmental Laws and all other applicable federal,
                  state, and local laws, regulations and rules and with the
                  orders and directives of all Governmental Authorities
                  exercising jurisdiction over such Real Property to the extent
                  any failure would have or be reasonably expected to have a
                  Material Adverse Effect.

                  (i) Other Information. With reasonable promptness upon any
         such request, such other information regarding the business, properties
         or financial condition of the Credit Parties as an Agent may reasonably
         request, including, without limitation, appraisals on personal
         property.

         7.2  Financial Covenants.

                  (a) Leverage Ratio. The Leverage Ratio, as of the end of each
         fiscal quarter of the Borrower for the twelve month period ending on
         such date, shall be less than or equal to:

                            (i) On December 31, 1996 and March 31, 1997, 3.30 to
                                1.0;

                           (ii) On June 30, 1997 and September 30, 1997, 3.25 to
                                1.0;

                          (iii) On December 31, 1997 and March 31, 1998, 3.00
                                to 1.0; and (iv) On June 30, 1998 and on the 
                                last day of each fiscal quarter of the Borrower 
                                thereafter, 2.75 to 1.0.

                  (b) Fixed Charge Coverage Ratio. The Fixed Charge Coverage
         Ratio, as of the end of each fiscal quarter of the Borrower for the
         twelve month period ending on such date, shall be greater than or equal
         to:



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                            (i) On the last day of each fiscal quarter of the 
                                Borrower from the Closing Date to and including 
                                September 30, 1997, 2.0 to 1.0; and

                           (ii) On December 31, 1997 and on the last day of 
                                each fiscal quarter of the Borrower thereafter, 
                                2.25 to 1.0.

         7.3 Preservation of Existence and Franchises. Each of the Credit
Parties will, and will cause all of their Subsidiaries to, do all things
necessary to preserve and keep in full force and effect its existence, rights,
franchises and authority except (a) as permitted by Section 8.4 or (b) as would
not have or be reasonably expected to have a Material Adverse Effect.

         7.4 Books and Records. Each of the Credit Parties will, and will cause
all of their Material Subsidiaries to, keep complete and accurate books and
records of its transactions in accordance with good accounting practices on the
basis of GAAP (including the establishment and maintenance of appropriate
reserves).

         7.5 Compliance with Law. Each of the Credit Parties will comply, and
will cause all of their Subsidiaries to comply, with all laws, rules,
regulations and orders, and all applicable restrictions imposed by all
Governmental Authorities, applicable to it and its property (including, without
limitation, Environmental Laws) unless such non-compliance would not have or
would not be reasonably expected to have a Material Adverse Effect.

         7.6 Payment of Taxes and Other Indebtedness. Each of the Credit Parties
will, and will cause all of their Subsidiaries to, pay, settle or discharge (a)
all taxes, assessments and governmental charges or levies imposed upon it, or
upon its income or profits, or upon any of its properties, before they shall
become delinquent, (b) all lawful claims (including claims for labor, materials
and supplies) which, if unpaid, might give rise to a Lien upon any of its
properties, and (c) except as prohibited hereunder, all of its other
Indebtedness as it shall become due; provided, however, that a Credit Party
shall not be required to pay any such tax, assessment, charge, levy, claim or
Indebtedness which is being contested in good faith by appropriate proceedings
and as to which adequate reserves therefor have been established in accordance
with GAAP, unless the failure to make any such payment would have a Material
Adverse Effect.

         7.7 Insurance. The Borrower will, for itself and on behalf of each of
its Subsidiaries, at all times maintain in full force and effect insurance
(including worker's compensation insurance, liability insurance, casualty
insurance and business interruption insurance) in such amounts, covering such
risks and liabilities and with such deductibles or self-insurance retentions as
are in accordance with normal industry practice. The insurance coverage of the
Borrower and its Subsidiaries, as of the Closing Date, is outlined as to
carrier, policy number, expiration date, type and amount on Schedule 7.7.

         7.8 Maintenance of Property. Except as permitted by Section 7.3, each
of the Credit Parties will, and will cause their Subsidiaries to, maintain and
preserve its properties and equipment in good repair, working order and
condition, normal wear and tear excepted (subject to damage by casualties), and
will make, or cause to be made, in such properties and equipment from time to
time


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all repairs, renewals, replacements, extensions, additions, betterments and
improvements thereto as may be needed or proper, to the extent and in the manner
customary for companies in similar businesses unless the failure to do so would
not have or would not be reasonably expected to have a Material Adverse Effect.

         7.9 Performance of Obligations. Each of the Credit Parties will, and
will cause their Subsidiaries to, perform in all respects all of its obligations
under the terms of all agreements, indentures, mortgages, security agreements or
other debt instruments to which it is a party or by which it is bound unless the
failure to do so would not have or be reasonably expected to have a Material
Adverse Effect.

         7.10 Use of Proceeds. The Borrower will use the proceeds of the Loans
solely (a) to effect the Spin-Off including refinancing the current existing
intercompany debt of the Borrower and its Subsidiaries and the payment of any
federal consolidated tax liabilities of the Borrower and its Subsidiaries and
(b) to provide for working capital, capital expenditures, acquisitions and other
lawful corporate purposes of the Borrower and its Subsidiaries.

         7.11 Audits/Inspections. Upon reasonable notice and during normal
business hours and in a manner that will not unreasonably interfere with its
business operations, each Credit Party will, and will cause their Subsidiaries
to, permit representatives appointed by an Agent (and upon the request of the
Required Lenders, an Agent shall make such appointment), including, without
limitation, independent accountants, agents, attorneys and appraisers to visit
and inspect such Credit Party's or Subsidiaries' property, including its books
and records, its accounts receivable and inventory, its facilities and its other
business assets, and to make photocopies or photographs thereof and to write
down and record any information such representative obtains and shall permit an
Agent or its representatives to investigate and verify the accuracy of
information provided to the Lenders, and to discuss all such matters with the
officers, employees and representatives of the Credit Parties and their
Subsidiaries.

         7.12 Additional Credit Parties. Within 30 days after the date the
officer's certificate is due pursuant to Section 7.1(c), the Borrower shall
cause (a) each Person who is a Material Domestic Subsidiary who is not already a
Guarantor to execute a Joinder Agreement in substantially the form of Exhibit
7.12, (b) itself and each Domestic Subsidiary that directly owns a Material
First Tier Foreign Subsidiary to pledge 65% of the Voting Stock of such Material
First Tier Foreign Subsidiary pursuant to a Pledge Agreement (to the extent 65%
of the Voting Stock of such Material First Tier Foreign Subsidiary was not
previously pledged), (c) itself and each Material Domestic Subsidiary that has
loaned money to a Non-Material Domestic Subsidiary to evidence such loan by an
enforceable promissory note and to deliver such promissory note, together with a
Collateral Assignment of Note and endorsement thereto (to the extent not
previously delivered), (d) such other Persons to execute Joinder Agreements or
pledge Voting Stock as required by Section 7.15, and (e) deliver such other
documentation as the Administrative Agent may reasonably request in connection
with the foregoing, including, without limitation, (i) appropriate certified
resolutions and other organizational and authorizing documents of such Person,
(ii) favorable opinions of counsel to such Person (which shall cover, among
other things, the legality, validity, binding effect and enforceability of the
documentation referred to above), all in form, content and scope reasonably
satisfactory to the Administrative Agent, and (iii) stock certificates with
stock powers executed in


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blank or evidence of perfection (which may include opinions) regarding
uncertificated securities and/or original promissory notes with executed
endorsements attached thereto. The Lenders agree that within 30 days after
receipt of reasonably sufficient evidence that (x) a Domestic Subsidiary ceases
to be a Material Domestic Subsidiary or (y) a Material First Tier Foreign
Subsidiary ceases to be a First Tier Foreign Subsidiary or ceases to be a
Material Foreign Subsidiary, then either such Domestic Subsidiary shall be
released from its obligations as a Guarantor or the stock of such Foreign
Subsidiary shall be returned to the Domestic Subsidiary pledging such stock. The
Lenders further agree that within 30 days after notice from the Borrower that
any loan or series of loans referred to in clause (c) above has been repaid in
full, then the pledge of the promissory note evidencing such loan shall be
terminated and the Administrative Agent shall release and return such promissory
note, together with the related Collateral Assignment of Note, to the Borrower
or such Material Domestic Subsidiary, as the case may be. The Agent is hereby
authorized in connection with the events described in the prior two sentences,
at the expense of the Borrower, to execute such documentation as appropriate to
evidence such release or return unless, in the circumstances described in (x)
and (y) above, such release or return would cause a violation of Section 7.15.

         7.13 Spin-Off. On or before March 31, 1997, the Agents shall have
received (a) evidence reasonably sufficient to them that (i) the Spin-Off has
occurred in accordance with applicable law and the terms and conditions of the
IRS Letter Ruling issued in connection therewith and (ii) the intercompany debt
has been repaid in connection with the Spin-Off, (b) copies of the Tax
Indemnification Agreements, the Tax Sharing Agreement and the Transaction
Agreement (which shall be in substantially the form delivered to the Lenders on
or before the Effective Date) and, if requested by a Lender, copies of all other
documents executed and delivered in connection with the Spin-Off, and (c) the
registration statement filed by the Borrower and declared effective by the
Securities and Exchange Commission.

         7.14 Uncertificated Securities. On or before March 31, 1997, the
Administrative Agent shall have received evidence satisfactory to it that the
Lenders have a first priority perfected security interest in the uncertificated
securities pledged on the Closing Date pursuant to the Pledge Agreements,
including, without limitation, opinions from foreign counsel.

         7.15 Additional Guarantors or Additional Pledges of Stock. (a) The
Borrower shall take all necessary action, at the times specified by the second
and third sentences of this Section 7.15(a), in respect of each fiscal quarter,
to ensure that, as of the last day of such fiscal quarter (after giving effect
to any Joinder Agrement and/or Pledge Agreement executed in respect of such
fiscal quarter pursuant to Section 7.12), the combined sum of the total assets
(excluding assets that pursuant to GAAP principles of consolidation would be
eliminated from the consolidated balance sheet of the Borrower as of such date)
owned by (a) the Credit Parties (together with their Subsidiaries on a
consolidated basis) and (b) the First Tier Foreign Subsidiaries in which the
Lenders have received a pledge of at least 65% of their Voting Stock (together
with their Subsidiaries on a consolidated basis) is greater than or equal to 80%
of the total assets owned by the Borrower and its Subsidiaries on a consolidated
basis. If on the date the officer's certificate is required to be delivered by
Section 7.1(c), the Borrower is not in compliance with the first sentence of
this Section 7.15(a), then, within 30 days after the due date of such
certificate, the Borrower shall do either or both of the following (as the
Borrower shall choose in its discretion): (a) cause additional Domestic
Subsidiaries to execute and deliver Joinder Agreements or (b) pledge or cause
one or more of its Domestic


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Subsidiaries to pledge (pursuant to a Pledge Agreement) 65% of the Voting Stock
of one or more additional First Tier Foreign Subsidiaries to the extent
necessary to be in compliance with the first sentence of this Section 7.15(a)
and to deliver such other documents, instruments, certificates or opinions in
connection therewith as required in connection with the execution of Joinder
Agreements or the pledge of Voting Stock as set forth in Section 7.12(e).

         (b) If, as of the last day of any fiscal quarter of the Borrower, the
percentage of total assets determined pursuant to the first sentence of Section
7.15(a) is greater than 80%, then, within 30 days of notice thereof by the
Borrower, the Lenders shall, as directed by the Borrower in its discretion, (i)
release any Domestic Subsidiary (other than a Material Domestic Subsidiary) from
its obligation as Guarantor and (ii) such pledged Voting Stock of any First Tier
Foreign Subsidiary (other than a Material First Tier Foreign Subsidiary),
together with any such other documents, instruments or certificates which were
delivered in connection with the execution of any Joinder Agreement executed by
such Domestic Subsidiary or pledge of Voting Stock by such Foreign Subsidiary;
provided however, that after giving effect to such release or return, the
Borrower and its Subsidiaries shall be in compliance with Section 7.15(a).

                                    SECTION 8

                               NEGATIVE COVENANTS

         Each Credit Party hereby covenants and agrees that until all
Commitments and Letters of Credit have been terminated and the Loans and LOC
Obligations, together with interest and fees hereunder, have been paid in full:

         8.1 Indebtedness. No Credit Party will, nor will it permit any of its
Subsidiaries to, contract, create, incur, assume or permit to exist any
Indebtedness, except:

                  (a) Indebtedness arising under this Credit Agreement and the
         other Credit Documents;

                  (b) Indebtedness existing as of the Closing Date as referenced
         in Section 6.10 (and renewals, refinancings or extensions thereof on
         terms and conditions substantially the same as such existing
         Indebtedness and in a principal amount not in excess of that
         outstanding as of the date of such renewal, refinancing or extension);

                  (c) Indebtedness in respect of current accounts payable and
         accrued expenses incurred in the ordinary course of business including,
         to the extent not current, accounts payable and accrued expenses that
         are subject to bona fide dispute;

                  (d) purchase money Indebtedness (including Capital Leases)
         incurred by the Borrower or any of its Subsidiaries to finance the
         purchase of fixed assets; provided that (i) the total of all such
         Indebtedness for all such Persons taken together shall not exceed an
         aggregate principal amount of $10,000,000 at any one time outstanding
         (including any such Indebtedness referred to in subsection (b) above);
         (ii) such Indebtedness when incurred shall not exceed the purchase
         price of the asset(s) financed; and (iii) no such Indebtedness shall


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         be refinanced for a principal amount in excess of the principal balance
         outstanding thereon at the time of such refinancing;

                  (e) other unsecured Indebtedness owing by Domestic
         Subsidiaries not to exceed, in the aggregate, at any one time,
         $10,000,000; and

                  (f) other unsecured Indebtedness owing by Foreign Subsidiaries
         not to exceed, in the aggregate, at any one time, $10,000,000.

         8.2 Liens. No Credit Party will, nor will it permit its Subsidiaries
to, contract, create, incur, assume or permit to exist any Lien with respect to
any of its property or assets of any kind (whether real or personal, tangible or
intangible), whether now owned or after acquired, except for Permitted Liens.

         8.3 Nature of Business. The Borrower will not, and will not permit its
Material Subsidiaries to, engage in any business other than (a) businesses in
which the Borrower (whether directly or through one or more of its Subsidiaries)
engages on the Closing Date or are contemplated by the Information Statement,
(b) similar or related businesses (including, without limitation, similar or
related businesses that serve the industries which purchase or use goods
manufactured or processed or services rendered by, any business in which the
Borrower is then permitted to engage (whether directly or through one or more of
its Subsidiaries), pursuant to this Section 8.3, and (c) businesses incidental
to the foregoing.

         8.4 Consolidation and Merger. No Credit Party will nor will it permit
any Subsidiary to, enter into any transaction of merger or consolidation or
liquidate, wind up or dissolve itself; provided that a Credit Party or a
Subsidiary of a Credit Party may merge or consolidate with or into another
Person if the following conditions are satisfied:

                  (a) the Administrative Agent is given prior written notice of
         such action;

                  (b) if the merger or consolidation involves a Credit Party,
         the Person formed by such consolidation or into which a Credit Party is
         merged shall either (i) be such Credit Party or (ii) be a Domestic
         Subsidiary and shall expressly assume in writing all of the obligations
         of such Credit Party under the Credit Documents; provided that if the
         transaction is between the Borrower and another Person, the Borrower
         must be the surviving entity;

                  (c) if the merger or consolidation involves a Material First
         Tier Foreign Subsidiary, the Lenders receive 65% of the Voting Stock of
         the surviving Material First Tier Foreign Subsidiary, if any;

                  (d) to the extent otherwise required by Section 7.12 or 7.15,
         the Credit Parties execute and deliver such documents, instruments and
         certificates as the Administrative Agent may request (including, if
         necessary, to maintain its perfection and priority in the collateral
         pledged pursuant to the Collateral Documents;



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                  (e) immediately after giving effect to such transaction, no
         Default or Event of Default shall have occurred and be continuing; and

                  (f) the Borrower delivers to the Agents an officer's
         certificate demonstrating compliance with clause (b) or (c) above, as
         applicable, and an opinion of counsel (who may, at the option of the
         Borrower, be the Borrower's in-house counsel) stating that such
         consolidation or merger and any written agreement entered into in
         connection therewith, comply with this Section 8.4.

         8.5 Sale or Lease of Assets. No Credit Party will, nor will it permit
any of its Subsidiaries to, convey, sell, lease, transfer or otherwise dispose
of, in one transaction or a series of transactions, all or any part of its
business or assets whether now owned or hereafter acquired, including, without
limitation, inventory, receivables, equipment, real property interests (whether
owned or leasehold), and securities, other than (a) any inventory sold or
otherwise disposed of in the ordinary course of business; (b) the sale, lease,
transfer or other disposal by a Credit Party (other than the Borrower) of any or
all of its assets to the Borrower or to another Credit Party; (c) obsolete,
slow-moving, idle or worn-out assets (including inventory) no longer used or
useful in its business; (d) the transfer of assets which constitute a Permitted
Investment or (e) such other transfer of assets if (i) such transfer is for fair
market value, (ii) at the time of such transfer no Default or Event of Default
exists and is continuing, (iii) as a result of such transfer no Material Adverse
Effect would occur or be reasonably likely to occur, (iv) the proceeds from such
transfer are not used to pay dividends and (v) the proceeds from such transfer
are, within six months from the date of such transfer, reinvested in a business
of a type similar to that which the Credit Parties and their Subsidiaries are
already engaged or were engaged at the time of such sale.

         8.6 Sale Leasebacks. No Credit Party will directly or indirectly, nor
will it permit its Subsidiaries to, become or remain liable as lessee or as
guarantor or other surety with respect to any lease of any property (whether
real or personal or mixed), whether now owned or hereafter acquired, (a) which
such Credit Party has sold or transferred or is to sell or transfer to any other
Person other than a Credit Party or (b) which such Credit Party intends to use
for substantially the same purpose as any other property which has been sold or
is to be sold or transferred by such Credit Party to any Person in connection
with such lease.

         8.7 Advances, Investments and Loans. No Credit Party will, nor will it
permit its Subsidiaries to, make any Investments except for Permitted
Investments.

         8.8 Restricted Payments. No Credit Party will, directly or indirectly,
nor will it permit its Subsidiaries to, (a) declare or pay any dividends or make
any other distribution upon any shares of its capital stock of any class or (b)
purchase, redeem or otherwise acquire or retire or make any provisions for
redemption, acquisition or retirement of any shares of its capital stock of any
class or any warrants or options to purchase any such shares (any such dividend,
repurchase, redemption, acquisition or retirement being a "Restricted Payment");
provided that (i) any Subsidiary of the Borrower may make Restricted Payments to
the Borrower, (ii) stock dividends may be paid pursuant to the Rights Plan and
the Benefits Plans, (iii) as long as no Default or Event of Default exists and
is continuing, Restricted Payments may be made with respect to (A) the Benefits
Plans of the type referred to in subsection (a) and (b) of the definition of
"Benefits Plans", (B) the Benefits Plans of


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the type referred to in subsection (c), (d), (e) and (f) of the definition of
"Benefits Plans" in an aggregate amount not to exceed $50,000,000, during the
term of this Credit Agreement and (C) the Rights Plans in an aggregate amount
not to exceed $2,000,000 during the term of this Credit Agreement, (iv) other
than with proceeds from a sale as set forth in Section 8.5, Restricted Payments
may be made if (A) no Default or Event of Default exists and is continuing and
(B) after giving effect thereto, the Credit Parties and their Subsidiaries are
in compliance with Section 7.2 and (v) the Borrower and any of its Subsidiaries
may repurchase stock of Covance Bio Technology Services Inc. in accordance with
that certain Capital Contribution and Shareholder's Agreement dated as of
February 22, 1995.

         8.9 Fiscal Year; Organizational Documents. Except as set forth on
Schedule 8.9, no Credit Party will, nor will it permit its Subsidiaries to, (a)
change its fiscal year or (b) change its articles or certificate of
incorporation or its bylaws if such change would have or be reasonably expected
to have a Material Adverse Effect.


                                    SECTION 9

                                EVENTS OF DEFAULT

         9.1 Events of Default. An Event of Default shall exist upon the
occurrence of any of the following specified events (each an "Event of
Default"):

                  (a) Payment. Any Credit Party shall default in the payment (i)
         when due of any principal of any of the Loans or any reimbursement
         obligation arising from drawings under Letters of Credit or (ii) within
         three days of when due of any interest on the Loans or any fees or
         other amounts owing hereunder, under any of the other Credit Documents
         or in connection herewith.

                  (b) Representations. Any representation, warranty or statement
         made or deemed to be made by any Credit Party herein, in any of the
         other Credit Documents, or in any state ment or certificate delivered
         or required to be delivered pursuant hereto or thereto shall prove
         untrue in any material respect on the date as of which it was made or
         deemed to have been made.

                  (c)      Covenants.  Any Credit Party shall:

                                    (i) default in the due performance or
                           observance of any term, covenant or agreement
                           contained in Sections 7.2 or 8.1 through 8.9
                           inclusive; or

                                    (ii) default in the due performance or
                           observance by it of any term, covenant or agreement
                           contained in Section 7.1 and such default shall
                           continue unremedied for a period of five Business
                           Days after the earlier of an officer of the Borrower
                           becoming aware of such default or notice thereof
                           given by an Agent; or



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                                (iii) default in the due performance or
                  observance by it of any term, covenant or agreement (other
                  than those referred to in subsections (a), (b) or (c)(i) or
                  (ii) of this Section 9.1) contained in this Credit Agreement
                  and such default shall continue unremedied for a period of at
                  least 20 Business Days after notice thereof given by an Agent.

                  (d) Other Credit Documents. (i) Any Credit Party shall default
         in the due performance or observance of any term, covenant or agreement
         in any of the other Credit Documents and such default shall continue
         unremedied for a period of at least 20 Business Days after notice
         thereof given by an Agent, or (ii) any Credit Document shall fail to be
         in full force and effect or the Borrower shall so assert or any Credit
         Document shall fail to give the Agents and/or the Lenders the security
         interests, liens, rights, powers and privileges purported to be created
         thereby.

                  (e) Guaranties. The guaranty given by the Credit Parties
         hereunder or by any Additional Credit Party hereafter or any provision
         thereof shall cease to be in full force and effect, or any guarantor
         thereunder or any Person acting by or on behalf of such guarantor shall
         deny or disaffirm such Guarantor's obligations under such guaranty.

                  (f) Bankruptcy, etc. The occurrence of any of the following
         with respect to the Borrower or any of its Material Subsidiaries (i) a
         court or governmental agency having juris diction in the premises shall
         enter a decree or order for relief in respect of the Borrower or any of
         its Material Subsidiaries in an involuntary case under any applicable
         bankruptcy, insolvency or other similar law now or hereafter in effect,
         or appoint a receiver, liquidator, assignee, custodian, trustee,
         sequestrator or similar official of the Borrower or any of its Material
         Subsidiaries or for any substantial part of its property or ordering
         the winding up or liquidation of its affairs; or (ii) an involuntary
         case under any applicable bankruptcy, insolvency or other similar law
         now or hereafter in effect is commenced against the Borrower or any of
         its Material Subsidiaries and such petition remains unstayed and in
         effect for a period of 60 consecutive days; or (iii) the Borrower or
         any of its Material Subsidiaries shall commence a voluntary case under
         any applicable bankruptcy, insolvency or other similar law now or
         hereafter in effect, or consent to the entry of an order for relief in
         an involuntary case under any such law, or consent to the appointment
         or taking possession by a receiver, liquidator, assignee, custodian,
         trustee, sequestrator or similar official of such Person or any
         substantial part of its property or make any general assignment for the
         benefit of creditors; or (iv) the Borrower or any of its Material
         Subsidiaries shall admit in writing its inability to pay its debts
         generally as they become due or any action shall be taken by such
         Person in furtherance of any of the aforesaid purposes.

                  (g) Defaults under Other Agreements. With respect to any
         Indebtedness (other than Indebtedness outstanding under this Credit
         Agreement) of the Borrower or any of its Subsidiaries in an aggregate
         principal amount in excess of $10,000,000, (i) a Credit Party shall (A)
         default in any payment (beyond the applicable grace period with respect
         thereto, if any) with respect to any such Indebtedness, or (B) default
         (after giving effect to any applicable grace period) in the observance
         or performance relating to such Indebtedness or contained in any
         instrument or agreement evidencing, securing or relating thereto, or
         any


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         other event or condition shall occur or condition exist, the effect of
         which default or other event or condition is to cause, or permit, the
         holder or holders of such Indebtedness (or trustee or agent on behalf
         of such holders) to cause (determined without regard to whether any
         notice or lapse of time is required) any such Indebtedness to become
         due prior to its stated maturity; or (ii) any such Indebtedness shall
         be declared due and payable, or required to be prepaid other than by a
         regularly scheduled required prepayment prior to the stated maturity
         thereof and such Indebtedness remains unpaid; or (iii) any such
         Indebtedness shall mature and remain unpaid.

                  (h) Judgments. One or more judgments, orders, or decrees shall
         be entered against any one or more of the Credit Parties involving a
         liability of $10,000,000 or more, in the aggregate, (to the extent not
         paid or covered by insurance provided by a financially solvent carrier
         who has acknowledged coverage) and such judgments, orders or decrees
         (i) are the subject of any enforcement proceeding commenced by any
         creditor or (ii) shall continue unsatisfied, undischarged and unstayed
         for a period ending on the last day on which such judgment, order or
         decree becomes final and unappealable.

                  (i) ERISA. The occurrence of any of the following events or
         conditions: (A) any "accumulated funding deficiency," as such term is
         defined in Section 302 of ERISA and Section 412 of the Code, whether or
         not waived, shall exist with respect to any Plan, or any lien shall
         arise on the assets of the Borrower or any of its Subsidiaries or any
         ERISA Affiliate in favor of the PBGC or a Plan; (B) a Termination Event
         shall occur with respect to a Single Employer Plan, which is, in the
         reasonable opinion of the Administrative Agent, likely to result in the
         termination of such Plan for purposes of Title IV of ERISA; (C) a
         Termination Event shall occur with respect to a Multiemployer Plan or
         Multiple Employer Plan, which is, in the reasonable opinion of the
         Administrative Agent, likely to result in (i) the termination of such
         Plan for purposes of Title IV of ERISA, or (ii) the Borrower or any of
         its Subsidiaries or any ERISA Affiliate incurring any liability in
         connection with a withdrawal from, reorganization of (within the
         meaning of Section 4241 of ERISA), or insolvency (within the meaning of
         Section 4245 of ERISA) of such Plan; or (D) any prohibited transaction
         (within the meaning of Section 406 of ERISA or Section 4975 of the
         Code) or breach of fiduciary responsibility shall occur which may
         subject the Borrower or any of its Subsidiaries or any ERISA Affiliate
         to any liability under Sections 406, 409, 502(i), or 502(l) of ERISA or
         Section 4975 of the Code, or under any agreement or other instrument
         pursuant to which the Borrower or any of its Subsidiaries or any ERISA
         Affiliate has agreed or is required to indemnify any person against any
         such liability.

                  (j)      Ownership.  There shall occur a Change of Control.

         9.2 Acceleration; Remedies. Following the occurrence and during the
continuance of an Event of Default, the Administrative Agent shall, upon the
request and direction of the Required Lenders, by written notice to the
Borrower, take any of the following actions without prejudice to the rights of
the Agents or any Lender to enforce its claims against the Credit Parties,
except as otherwise specifically provided for herein:



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<PAGE>



                  (a) Termination of Commitments. Declare the Commitments
         terminated whereupon the Commitments shall be immediately terminated.

                  (b) Acceleration of Loans. Declare the unpaid principal of and
         any accrued interest in respect of all Loans, any reimbursement
         obligations arising from drawings under Letters of Credit and, without
         duplication, any and all other indebtedness or obligations of any and
         every kind then owing by a Credit Party to any of the Lenders hereunder
         to be due whereupon the same shall be immediately due and payable
         without presentment, demand, protest or other notice of any kind, all
         of which are hereby waived by the Credit Parties.

                  (c) Cash Collateral. Direct the Borrower to pay (and the
         Borrower agrees that upon receipt of such notice, or upon the
         occurrence of an Event of Default under Section 9.1(f), it will
         immediately pay) to the Administrative Agent additional cash, to be
         held by the Administrative Agent, for the benefit of the Lenders, in a
         cash collateral account as security for the LOC Obligations in respect
         of subsequent drawings under all then outstanding Letters of Credit in
         an amount equal to the maximum aggregate amount which may be drawn
         under all Letters of Credits then outstanding.

                  (d) Enforcement of Rights. Enforce any and all rights and
         interests created and existing under the Credit Documents, including,
         without limitation, all rights and remedies against a Guarantor, all
         rights under the Collateral Documents and all rights of set-off.

Notwithstanding the foregoing, if an Event of Default specified in Section
9.1(f) shall occur, then the Commitments shall automatically terminate and all
Loans, all reimbursement obligations under Letters of Credit, all accrued and
unpaid interest in respect thereof, all accrued and unpaid fees and other
indebtedness or obligations owing to the Lenders hereunder shall immediately
become due and payable without the giving of any notice or other action by the
Agents or the Lenders, which notice or other action is expressly waived by the
Credit Parties.

Notwithstanding the fact that enforcement powers reside primarily with the
Administrative Agent, each Lender has, to the extent permitted by law, a
separate right of payment and shall be considered a separate "creditor" holding
a separate "claim" within the meaning of Section 101(5) of the Bankruptcy Code
or any other insolvency statute.

         9.3 Allocation of Payments After Event of Default. Notwithstanding any
other provisions of this Credit Agreement, after the occurrence and during the
continuance of an Event of Default, all amounts collected or received by an
Agent or any Lender on account of amounts outstanding under any of the Credit
Documents or collateral under the Pledge Agreement shall be paid over or
delivered as follows:

                  FIRST, to the payment of all reasonable out-of-pocket costs
         and expenses (including without limitation reasonable attorneys' fees)
         of the Agents in connection with enforcing the rights of the Lenders
         under the Credit Documents and any protective advances made by the
         Administrative Agent under or pursuant to the terms of the Pledge
         Agreement;

                  SECOND, to payment of any fees owed to an Agent or the Issuing
         Lender;


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                  THIRD, to the payment of all reasonable out-of-pocket costs
         and expenses, (including, without limitation, reasonable attorneys'
         fees) of each of the Lenders in connection with enforcing its rights
         under the Credit Documents;

                  FOURTH, to the payment of all accrued fees and interest
         payable to the Lenders hereunder;

                  FIFTH, to the payment of the outstanding principal amount of
         the Loans and unreimbursed drawings under Letters of Credit and to the
         payment or cash collateralization of the outstanding LOC Obligations,
         pro rata, as set forth below;

                  SIXTH, to all other obligations of the Credit Parties which
         shall have become due and payable under the Credit Documents and the
         LOC Documents and not repaid pursuant to clauses "FIRST" through
         "FIFTH" above; and

                  SEVENTH, to the payment of the surplus, if any, to whoever may
         be lawfully entitled to receive such surplus.

In carrying out the foregoing, (a) amounts received shall be applied in the
numerical order provided until exhausted prior to application to the next
succeeding category; (b) each of the Lenders shall receive an amount equal to
its pro rata share (based on the proportion that the then outstanding Loans and
LOC Obligations held by such Lender bears to the aggregate then outstanding
Loans and LOC Obligations of amounts available to be applied pursuant to clauses
"THIRD", "FOURTH," "FIFTH," and "SIXTH" above; and (c) to the extent that any
amounts available for distribution pursuant to clause "FIFTH" above are
attributable to the issued but undrawn amount of outstanding Letters of Credit,
such amounts shall be held by the Administrative Agent in a cash collateral
account and applied (x) first, to reimburse the Issuing Lender from time to time
for any drawings under such Letters of Credit and (y) then, following the
expiration of all Letters of Credit, to all other obligations of the types
described in clauses "FIFTH" and "SIXTH" above in the manner provided in this
Section 9.3.


                                   SECTION 10

                                AGENCY PROVISIONS

         10.1 Appointment. Each Lender hereby designates and appoints
NationsBank, N.A. as Administrative Agent and Wachovia Bank of Georgia, N.A. as
Syndication Agent of such Lender to act as specified herein and the other Credit
Documents and the LOC Documents (including with respect to NationsBank, N.A. the
right to act as the collateral agent under the Collateral Documents), and each
such Lender hereby authorizes the Agents, as the agents for such Lender, to take
such action on its behalf under the provisions of this Credit Agreement and the
other Credit Documents and the LOC Documents and to exercise such powers and
perform such duties as are expressly delegated by the terms hereof and of the
other Credit Documents and of the LOC Documents, together with such other powers
as are reasonably incidental thereto. Notwithstanding any provision to the
contrary elsewhere herein and in the other Credit Documents, the Agents shall
not have any


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duties or responsibilities, except those expressly set forth herein and therein,
or any fiduciary relationship with any Lender, and no implied covenants,
functions, responsibilities, duties, obligations or liabilities shall be read
into this Credit Agreement or any of the other Credit Documents or any of the
LOC Documents, or shall otherwise exist against the Agents. The provisions of
this Section are solely for the benefit of the Agents and the Lenders and none
of the Credit Parties shall have any rights as a third party beneficiary of the
provisions hereof. In performing its functions and duties under this Credit
Agreement and the other Credit Documents and the LOC Documents, each Agent shall
act solely as an agent of the Lenders and does not assume and shall not be
deemed to have assumed any obligation or relationship of agency or trust with or
for any Credit Party.

         10.2 Delegation of Duties. An Agent may execute any of its duties
hereunder or under the other Credit Documents by or through agents or
attorneys-in-fact and shall be entitled to advice of counsel concerning all
matters pertaining to such duties. An Agent shall not be responsible for the
negligence or misconduct of any agents or attorneys-in-fact selected by it with
reasonable care.

         10.3 Exculpatory Provisions. Neither the Agents nor any of their
officers, directors, employees, agents, attorneys-in-fact or affiliates shall be
(a) liable for any action lawfully taken or omitted to be taken by it or such
Person under or in connection herewith or in connection with any of the other
Credit Documents or the LOC Documents (except for its or such Person's own gross
negligence or willful misconduct) or (b) responsible in any manner to any of the
Lenders for any recitals, statements, representations or warranties made by any
of the Credit Parties contained herein or in any of the other Credit Documents
or the LOC Documents or in any certificate, report, document, financial
statement or other written or oral statement referred to or provided for in, or
received by an Agent under or in connection herewith or in connection with the
other Credit Documents or the LOC Documents, or enforceability or sufficiency
therefor of any of the other Credit Documents or the LOC Documents, or for any
failure of the Borrower to perform its obligations hereunder or thereunder. The
Agents shall not be responsible to any Lender for the effectiveness,
genuineness, validity, enforceability, collectibility or sufficiency of this
Credit Agreement, or any of the other Credit Documents or the LOC Documents or
for any representations, warranties, recitals or statements made herein or
therein or made by the Borrower or any Credit Party in any written or oral
statement or in any financial or other statements, instruments, reports,
certificates or any other documents in connection herewith or therewith
furnished or made by an Agent to the Lenders or by or on behalf of the Credit
Parties to the Agents or any Lender or be required to ascertain or inquire as to
the performance or observance of any of the terms, conditions, provisions,
covenants or agreements contained herein or therein or as to the use of the
proceeds of the Loans or the use of the Letters of Credit or of the existence or
possible existence of any Default or Event of Default or to inspect the
properties, books or records of the Credit Parties. The Agents are not trustees
for the Lenders and owe no fiduciary duty to the Lenders.

         10.4 Reliance on Communications. The Agents shall be entitled to rely,
and shall be fully protected in relying, upon any note, writing, resolution,
notice, consent, certificate, affidavit, letter, cablegram, telegram, telecopy,
telex or teletype message, statement, order or other document or conversation
believed by it to be genuine and correct and to have been signed, sent or made
by the proper Person or Persons and upon advice and statements of legal counsel
(including, without limitation, counsel to any of the Credit Parties,
independent accountants and other experts selected


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by the Agents with reasonable care). The Agents may deem and treat the Lenders
as the owner of its interests hereunder for all purposes unless a written notice
of assignment, negotiation or transfer thereof shall have been filed with the
Administrative Agent in accordance with Section 11.3(b). The Agents shall be
fully justified in failing or refusing to take any action under this Credit
Agreement or under any of the other Credit Documents or the LOC Documents unless
it shall first receive such advice or concurrence of the Required Lenders as it
deems appropriate or it shall first be indemnified to its satisfaction by the
Lenders against any and all liability and expense which may be incurred by it by
reason of taking or continuing to take any such action. The Agents shall in all
cases be fully protected in acting, or in refraining from acting, hereunder or
under any of the other Credit Documents or the LOC Documents in accordance with
a request of the Required Lenders (or to the extent specifically provided in
Section 11.6, all the Lenders) and such request and any action taken or failure
to act pursuant thereto shall be binding upon all the Lenders (including their
successors and assigns).

         10.5 Notice of Default. An Agent shall not be deemed to have knowledge
or notice of the occurrence of any Default or Event of Default hereunder unless
such Agent has actual knowledge of such Default or Event of Default or has
received notice from a Lender or a Credit Party referring to the Credit
Document, describing such Default or Event of Default and stating that such
notice is a "notice of default." In the event that the Administrative Agent
receives such a notice or has such actual knowledge, the Administrative Agent
shall give prompt notice thereof to the Lenders. The Administrative Agent shall
take such action with respect to such Default or Event of Default as shall be
reasonably directed by the Required Lenders.

         10.6 Non-Reliance on Agents and Other Lenders. Each Lender expressly
acknowledges that neither the Agents, NationsBanc Capital Markets, Inc. ("NCMI")
nor any of their officers, directors, employees, agents, attorneys-in-fact or
affiliates has made any representations or warranties to it and that no act by
the Agents, NCMI or any affiliate thereof hereinafter taken, including any
review of the affairs of any Credit Party, shall be deemed to constitute any
representation or warranty by the Agents or NCMI to any Lender. Each Lender
represents to the Agents and NCMI that it has, independently and without
reliance upon the Agents or NCMI or any other Lender, and based on such
documents and information as it has deemed appropriate, made its own appraisal
of and investigation into the business, assets, operations, property, financial
and other conditions, prospects and creditworthiness of the Credit Parties and
made its own decision to make its Loans hereunder and enter into this Credit
Agreement. Each Lender also represents that it will, independently and without
reliance upon the Agents, NCMI or any other Lender, and based on such documents
and information as it shall deem appropriate at the time, continue to make its
own credit analysis, appraisals and decisions in taking or not taking action
under this Credit Agreement, and to make such investigation as it deems
necessary to inform itself as to the business, assets, operations, property,
financial and other conditions, prospects and creditworthiness of the Credit
Parties. Except for notices, reports and other documents expressly required to
be furnished to the Lenders by the Administrative Agent hereunder, the Agents
and NCMI shall not have any duty or responsibility to provide any Lender with
any credit or other information concerning the business, operations, assets,
property, financial or other conditions, prospects or creditworthiness of the
Credit Parties which may come into the possession of the Agents, NCMI or any of
their officers, directors, employees, agents, attorneys-in-fact or affiliates.



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         10.7 Indemnification. The Lenders agree to indemnify each Agent in its
capacity as such (to the extent not reimbursed by the Borrower and without
limiting the obligation of the Borrower to do so), ratably according to their
respective Commitments (or if the Commitments have expired or been terminated,
in accordance with the respective principal amounts of outstanding Loans and
Participation Interest of the Lenders), from and against any and all
liabilities, obligations, losses, damages, penalties, actions, judgments, suits,
costs, expenses or disbursements of any kind whatsoever which may at any time
(including without limitation at any time following payment in full of the
Credit Party Obligations) be imposed on, incurred by or asserted against an
Agent in its capacity as such in any way relating to or arising out of this
Credit Agreement or the other Credit Documents or the LOC Documents or any
documents contemplated by or referred to herein or therein or the transactions
contemplated hereby or thereby or any action taken or omitted by an Agent under
or in connection with any of the foregoing; provided that no Lender shall be
liable for the payment of any portion of such liabilities, obligations, losses,
damages, penalties, actions, judgments, suits, costs, expenses or disbursements
resulting from the gross negligence or willful misconduct of an Agent. If any
indemnity furnished to an Agent for any purpose shall, in the opinion of such
Agent, be insufficient or become impaired, such Agent may call for additional
indemnity and cease, or not commence, to do the acts indemnified against until
such additional indemnity is furnished. The agreements in this Section shall
survive the payment of the Credit Party Obligations and all other amounts
payable hereunder and under the other Credit Documents.

         10.8 Agents in Their Individual Capacity. Each Agent and its affiliates
may make loans to, accept deposits from and generally engage in any kind of
business with the Borrower or any other Credit Party as though such Agent were
not an Agent hereunder. With respect to the Loans made and Letters of Credit
issued and all obligations owing to it, an Agent shall have the same rights and
powers under this Credit Agreement as any Lender and may exercise the same as
though they were not an Agent, and the terms "Lender" and "Lenders" shall
include each Agent in its individual capacity.

         10.9 Successor Agent. Any Agent may, at any time, resign upon 20 days
written notice to the Lenders. Upon any such resignation, the Required Lenders
shall, subject to the consent of the Borrower in its sole discretion, have the
right to appoint a successor Agent. If no successor Agent shall have been so
appointed by the Required Lenders, and shall have accepted such appointment,
within 45 days after the notice of resignation, then the retiring Agent shall
select a successor Agent provided such successor is a Lender hereunder or
qualifies as an Eligible Assignee. Upon the acceptance of any appointment as an
Agent hereunder by a successor, such successor Agent shall thereupon succeed to
and become vested with all the rights, powers, privileges and duties of the
retiring Agent, and the retiring Agent shall be discharged from its duties and
obligations as an Agent, as appropriate, under this Credit Agreement and the
other Credit Documents and the provisions of this Section 10.9 shall inure to
its benefit as to any actions taken or omitted to be taken by it while it was an
Agent under this Credit Agreement.




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                                   SECTION 11

                                  MISCELLANEOUS

         11.1 Notices. Except as otherwise expressly provided herein, all
notices and other communications shall have been duly given and shall be
effective (a) when delivered, (b) when transmitted via telecopy (or other
facsimile device) to the number set out below, (c) the Business Day following
the day on which the same has been delivered prepaid to a reputable national
overnight air courier service, or (d) the third Business Day following the day
on which the same is sent by certified or registered mail, postage prepaid, in
each case to the respective parties at the address or telecopy numbers set forth
on Schedule 11.1, or at such other address as such party may specify by written
notice to the other parties hereto.

         11.2 Right of Set-Off. In addition to any rights now or hereafter
granted under applicable law or otherwise, and not by way of limitation of any
such rights, upon the occurrence and during the continuance of an Event of
Default and the commencement of remedies described in Section 9.2, then, to the
extent permitted by applicable law, each Lender is authorized at any time and
from time to time, without presentment, demand, protest or other notice of any
kind (all of which rights being hereby expressly waived), to set-off and to
appropriate and apply any and all deposits (general or special) and any other
indebtedness at any time held or owing by such Lender (including, without
limitation, branches, agencies or Affiliates of such Lender wherever located) to
or for the credit or the account of any Credit Party against obligations and
liabilities of such Credit Party to the Lenders hereunder, under the Notes, or
the other Credit Documents, irrespective of whether the Administrative Agent or
the Lenders shall have made any demand hereunder and although such obligations,
liabilities or claims, or any of them, may be contingent or unmatured, and any
such set-off shall be deemed to have been made immediately upon the occurrence
of an Event of Default even though such charge is made or entered on the books
of such Lender subsequent thereto; provided that promptly following any such
set-off, such Lender will provide written notice thereof to the Borrower.

         11.3     Benefit of Agreement.

                  (a) Generally. This Credit Agreement shall be binding upon and
         inure to the benefit of and be enforceable by the respective successors
         and assigns of the parties hereto; provided that none of the Credit
         Parties may assign and transfer any of its interests (except as
         permitted by Section 8.4 or 8.5) without the prior written consent of
         the Lenders; and provided further that the rights of each Lender to
         transfer, assign or grant participations in its rights and/or
         obligations hereunder shall be limited as set forth below in
         subsections (b) and (c) of this Section 11.3. Notwithstanding the above
         (including anything set forth in subsections (b) and (c) of this
         Section 11.3), nothing herein shall restrict, prevent or prohibit any
         Lender from (A) pledging its Loans hereunder to a Federal Reserve Bank
         in support of borrowings made by such Lender from such Federal Reserve
         Bank, or (B) granting assignments or participations in such Lender's
         Loans and/or Commitments hereunder to its parent company and/or to any
         Affiliate of such Lender (provided that such parent company or
         Affiliate qualifies as an Eligible Assignee) or to any existing Lender;
         provided that, as of the date of such assignment or participation, such
         assignee or participant shall not be entitled


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         to receive a greater payment under Section 3.13 than the assigning or
         participating Lender would be entitled to receive.

                  (b) Assignments. In addition to the assignments permitted by
         Section 11.3(a), each Lender may, with the prior written consent of the
         Borrower and the Administrative Agent (provided that no consent of the
         Borrower shall be required during the existence and continuation of an
         Event of Default), which consent shall not be unreasonably withheld or
         delayed, assign all or a portion of its rights and obligations
         hereunder pursuant to an assignment agreement substantially in the form
         of Exhibit 11.3 to one or more Eligible Assignees; provided that (i)
         any such assignment shall be in a minimum aggregate amount of
         $10,000,000 of the Commitments and in integral multiples of $1,000,000
         above such amount (or the remaining amount of Commitments held by such
         Lender), (ii) each such assignment shall be of a constant, not varying,
         percentage of all of the assigning Lender's rights and obligations
         under the Commitment being assigned. Any assignment hereunder
         (including, but not limited to, any assignment by a Lender to another
         Lender) shall be effective upon satisfaction of the conditions set
         forth above and delivery to the Administrative Agent of a duly executed
         assignment agreement, in substantially the form of Exhibit 11.3,
         together with a transfer fee of $3,500 payable to the Administrative
         Agent for its own account, (iii) each such assignment made as a result
         of a demand by the Borrower pursuant to Section 11.3(d) shall be
         arranged by the Borrower after consultation with the Agents and shall
         be either an assignment of all of the rights and obligations of the
         assigning Lender under this Credit Agreement or an assignment of a
         portion of such rights and obligations made concurrently with another
         such assignment or other such assignments that together cover all of
         the rights and obligations of the assigning Lender under this Credit
         Agreement or an assignment of a portion of such rights and obligations
         made concurrently with another such assignment or other such
         assignments that together cover all of the rights and obligations of
         the assigning Lender under this Credit Agreement, (iv) no Lender shall
         be obligated to make any such assignment as a result of a demand by the
         Borrower pursuant to Section 11.3(d) unless and until such Lender shall
         have received one or more payments from either the Borrower or one or
         more Eligible Assignees in an aggregate amount at least equal to the
         aggregate outstanding principal amount of the Revolving Loans owing to
         such Lender, together with accrued interest thereon, to the date of
         payment of such principal amount and all other amounts payable to such
         lender under this Credit Agreement and (v) the Borrower shall be
         entitled to withhold its consent if an assignment would result in
         greater payments under Sections 3.9, 3.11, or 3.13. Upon the
         effectiveness of any such assignment, the assignee shall become a
         "Lender" for all purposes of this Credit Agreement and the other Credit
         Documents and, to the extent of such assignment, the assigning Lender
         shall be relieved of its obligations hereunder to the extent of the
         Loans and Commitment components being assigned. Along such lines the
         Borrower agrees that upon notice of any such assignment and surrender
         of the appropriate Note or Notes, it will promptly provide to the
         assigning Lender and to the assignee separate promissory notes in the
         amount of their respective interests substantially in the form of the
         original Note or Notes (but with notation thereon that it is given in
         substitution for and replacement of the original Note or Notes or any
         replacement notes thereof).



                                       79

<PAGE>



         By executing and delivering an assignment agreement in accordance with
         this Section 11.3(b), the assigning Lender thereunder and the assignee
         thereunder shall be deemed to confirm to and agree with each other and
         the other parties hereto as follows: (i) such assigning Lender warrants
         that it is the legal and beneficial owner of the interest being
         assigned thereby free and clear of any adverse claim and the assignee
         warrants that it is an Eligible Assignee; (ii) except as set forth in
         clause (i) above, such assigning Lender makes no representation or
         warranty and assumes no responsibility with respect to any statements,
         warranties or representations made in or in connection with this Credit
         Agreement, any of the other Credit Documents or any other instrument or
         document furnished pursuant hereto or thereto, or the execution,
         legality, validity, enforceability, genuineness, sufficiency or value
         of this Credit Agreement, any of the other Credit Documents or any
         other instrument or document furnished pursuant hereto or thereto or
         the financial condition of any Credit Party or the performance or
         observance by any Credit Party of any of its obligations under this
         Credit Agreement, any of the other Credit Documents or any other
         instrument or document furnished pursuant hereto or thereto; (iii) such
         assignee represents and warrants that it is legally authorized to enter
         into such assignment agreement; (iv) such assignee confirms that it has
         received a copy of this Credit Agreement, the other Credit Documents
         and such other documents and information as it has deemed appropriate
         to make its own credit analysis and decision to enter into such
         assignment agreement; (v) such assignee will independently and without
         reliance upon the Agents, such assigning Lender or any other Lender,
         and based on such documents and information as it shall deem
         appropriate at the time, continue to make its own credit decisions in
         taking or not taking action under this Credit Agreement and the other
         Credit Documents; (vi) such assignee appoints and authorizes the Agents
         to take such action on its behalf and to exercise such powers under
         this Credit Agreement or any other Credit Document as are delegated to
         the Agents by the terms hereof or thereof, together with such powers as
         are reasonably incidental thereto; and (vii) such assignee agrees that
         it will perform in accordance with their terms all the obligations
         which by the terms of this Credit Agreement and the other Credit
         Documents are required to be performed by it as a Lender.

                  (c) Participations. Each Lender may sell, transfer, grant or
         assign participations in all or any part of such Lender's interests and
         obligations hereunder; provided that (i) such selling Lender shall
         remain a "Lender" for all purposes under this Credit Agreement (such
         selling Lender's obligations under the Credit Documents remaining
         unchanged) and the participant shall not constitute a Lender hereunder,
         (ii) no such participant shall have, or be granted, rights to approve
         any amendment or waiver relating to this Credit Agreement or the other
         Credit Documents except to the extent any such amendment or waiver
         would (A) reduce the principal of or rate of interest on or fees in
         respect of any Loans in which the participant is participating or
         increase any Commitments with respect thereto, (B) postpone the date
         fixed for any payment of principal (including the extension of the
         final maturity of any Loan or the date of any mandatory prepayment),
         interest or fees in which the participant is participating, or (C)
         release all or substantially all of the collateral or guaranties
         (except as expressly provided in the Credit Documents) supporting any
         of the Loans or Commitments in which the participant is participating,
         (iii) sub-participations by the participant (except to an Affiliate,
         parent company or Affiliate of a parent company of the participant)
         shall be prohibited and (iv) any such participations shall be in a
         minimum


                                       80

<PAGE>



         aggregate amount of $10,000,000 of the Commitments and in integral
         multiples of $1,000,000 in excess thereof. In the case of any such
         participation, the participant shall not have any rights under this
         Credit Agreement or the other Credit Documents (the participant's
         rights against the selling Lender in respect of such participation to
         be those set forth in the participation agreement with such Lender
         creating such participation) and all amounts payable by the Borrower
         hereunder shall be determined as if such Lender had not sold such
         participation; provided, however, that such participant shall be
         entitled to receive additional amounts under Sections 3.9, 3.12, 3.13
         and 3.14 to the same extent that the Lender from which such participant
         acquired its participation would be entitled to the benefit of such
         cost protection provisions.

                  (d) Each Lender grants (i) to the Agents the right to purchase
         all (but not less than all) of such Lender's Commitments and Revolving
         Loans owning to it and the Notes held by it and all of its rights and
         obligations hereunder and under the other Credit Documents at a price
         equal to the aggregate amount of outstanding Revolving Loans owed to
         such Lender (together with all accrued and unpaid interest and fees and
         other amounts owing to such Lender), and (ii) to the Borrower the right
         to cause an assignment of all (but not less than all) of such Lender's
         Commitment and Revolving Loans owing to it and the Notes held by it and
         all of its rights and obligations hereunder and under the other Credit
         Documents, which right may be exercised by the Agents or the Borrower,
         as the case may be, if (A) such Lender refuses to execute any
         amendment, waiver or consent which requires the written consent of all
         of the Lenders and to which the Required Lenders, the Agents and the
         Borrower have agreed, (B) such Lender has delivered a notice or
         certificate pursuant to Section 3.9 or 3.11 or if the Borrower in
         connection therewith or for any other reason is required to deduct or
         withhold any tax, levy, impost, charge, assessment or similar item from
         any amount payable to or for such Lender hereunder, (C) the Borrower
         has knowledge or facts, events or circumstances which are reasonably
         likely to entitle such Lender to deliver a certificate pursuant to
         Section 3.9 or 3.11 and such Lender is unwilling or unable to take
         action to eliminate or avoid its delivery of such a certificate, (D)
         any Non-Excluded Taxes have been or are reasonably likely to be imposed
         on such Lender, (E) such Lender is unable or unwilling to complete or
         deliver any form required to be delivered by it pursuant to Section
         3.13, (F) such Lender has received or is reasonably likely to receive a
         notice or written communication as described in Section 3.13(f), (G)
         such Lender shall have become subject to any receivership,
         conservatorship or other insolvency proceeding, (H) the Eurocurrency
         Reserve Percentage with respect to such Lender's Eurocurrency Loans is,
         or would be reasonably likely to become with any incurrence of
         Eurocurrency Loans, greater than zero, or (I) such Lender shall be a
         Defaulting Lender. Each Lender agrees that if the Agents or the
         Borrower, as the case may be, exercises its option hereunder, it shall
         promptly execute and deliver all agreements and documentation necessary
         to effectuate such assignment as set forth in Section 11.3(b).

         11.4 No Waiver; Remedies Cumulative. No failure or delay on the part of
an Agent or any Lender in exercising any right, power or privilege hereunder or
under any other Credit Document and no course of dealing between the Borrower or
any Credit Party and the Agents or any Lender shall operate as a waiver thereof;
nor shall any single or partial exercise of any right, power or privilege
hereunder or under any other Credit Document preclude any other or further
exercise


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<PAGE>



thereof or the exercise of any other right, power or privilege hereunder or
thereunder. The rights and remedies provided herein are cumulative and not
exclusive of any rights or remedies which the Agents or any Lender would
otherwise have. No notice to or demand on any Credit Party in any case shall
entitle any Credit Party to any other or further notice or demand in similar or
other circumstances or constitute a waiver of the rights of the Agents or the
Lenders to any other or further action in any circumstances without notice or
demand.

         11.5 Payment of Expenses; Indemnification. The Credit Parties agree to:
(a) pay all reasonable out-of-pocket costs and expenses of (i) the Agents and
NationsBanc Capital Markets, Inc. ("NCMI") in connection with (A) the
negotiation, preparation, execution and delivery and administration of this
Credit Agreement and the other Credit Documents and the LOC Documents and the
documents and instruments referred to therein (including, without limitation,
the reasonable fees and expenses of Moore & Van Allen, special counsel to the
Agents and the fees and expenses of counsel for the Agents in connection with
collateral issues), and (B) any amendment, waiver or consent relating hereto and
thereto including, but not limited to, any such amendments, waivers or consents
resulting from or related to any work-out, renegotiation or restructure relating
to the performance by the Credit Parties under this Credit Agreement and (ii)
the Agents and the Lenders in connection with (A) enforcement of the Credit
Documents and the documents and instruments referred to therein, including,
without limitation, in connection with any such enforcement, the reasonable fees
and disbursements of counsel for the Agents and each of the Lenders, and (B) any
bankruptcy or insolvency proceeding of the Borrower or a Material Subsidiary and
(b) indemnify each Agent, NCMI and each Lender, its officers, directors,
employees, representatives and agents from and hold each of them harmless
against any and all losses, liabilities, claims, damages or expenses incurred by
any of them as a result of, or arising out of, or in any way related to, or by
reason of, any investigation, litigation or other proceeding (whether or not any
Agent, NCMI or Lender is a party thereto) related to (i) the entering into
and/or performance of any Credit Document or any LOC Document or the use of
proceeds of any Loans (including other extensions of credit) hereunder or the
consummation of any other transactions contemplated in any Credit Document or
any LOC Document, including, without limitation, the reasonable fees and
disbursements of counsel and settlement costs incurred in connection with any
such investigation, litigation or other proceeding (but excluding any such
losses, liabilities, claims, damages or expenses to the extent incurred by
reason of gross negligence or willful misconduct on the part of the Person to be
indemnified), (ii) any Environmental Claim and (iii) any claims for Non-Excluded
Taxes.

         11.6 Amendments, Waivers and Consents. In order for any amendment,
change, waiver, discharge or termination of this Credit Agreement or any of the
other Credit Documents to be binding on the Lenders and the Credit Parties, such
amendment, change, waiver, discharge or termination must be in writing and
signed by the Required Lenders and the then Credit Parties; provided that to be
binding no such amendment, change, waiver, discharge or termination shall:

                  (a) extend the Revolving Loan Maturity Date without the
         consent of all the Lenders, or postpone or extend the time for any
         payment or prepayment of principal to any Lender without the consent of
         such Lender;



                                       82

<PAGE>



                  (b) reduce the rate (other than as a result of waiving the
         applicability of any post- default increase in interest rates) or
         extend the time of payment of interest on any Loan made by or any fees
         hereunder for the account of any Lender without the consent of such
         Lender;

                  (c) reduce or waive the principal amount of any Loan made by
         any Lender without the consent of such Lender;

                  (d) increase or extend the Commitment of a Lender over the
         amount thereof in effect without the consent of such Lender (it being
         understood and agreed that a waiver of any Default or Event of Default
         or a waiver of any mandatory reduction in the Commitments shall not
         constitute an increase in the Commitment of any Lender);

                  (e) except as otherwise permitted in this Credit Agreement or
         the Collateral Documents, release the Borrower or substantially all of
         the other Credit Parties from their respective obligations under the
         Credit Documents or release all or substantially all of the collateral
         pledged under the Collateral Documents without the consent of all the
         Lenders;

                  (f) amend, modify or waive any provision of this Section or
         Section 3.4(a), 3.4(b)(i), 3.7, 3.8, 3.9, 3.10, 3.11, 3.12, 3.13, 3.14,
         9.1(a), 11.2, 11.3 or 11.5 without the consent of all the Lenders;

                  (g) reduce any percentage specified in, or otherwise modify,
         the definition of Required Lenders without the consent of all the
         Lenders; or

                  (h) consent to the assignment or transfer by the Borrower or
         of any of its rights and obligations under (or in respect of) the
         Credit Documents except as permitted under Section 8.4 without the
         consent of all the Lenders.

Notwithstanding the fact that the consent of all the Lenders is required in
certain circumstances as set forth above, (x) each Lender is entitled to vote as
such Lender sees fit on any reorganization plan that affects the Loans or the
Letters of Credit, and each Lender acknowledges that the provisions of Section
1126(c) of the Bankruptcy Code supersedes the unanimous consent provisions set
forth herein and (y) the Required Lenders may consent to allow a Credit Party to
use cash collateral in the context of a bankruptcy or insolvency proceeding.

         11.7 Counterparts. This Credit Agreement may be executed in any number
of counterparts, each of which where so executed and delivered shall be an
original, but all of which shall constitute one and the same instrument.
Delivery of an executed counterpart by telecopy shall be as effective as
delivery of a manually executed counterpart hereto and shall constitute a
representation that an original executed counterpart will be provided. It shall
not be necessary in making proof of this Credit Agreement to produce or account
for more than one such counterpart.

         11.8 Headings. The headings of the sections and subsections hereof are
provided for convenience only and shall not in any way affect the meaning or
construction of any provision of this Credit Agreement.



                                       83

<PAGE>



         11.9 Defaulting Lender. Each Lender understands and agrees that if such
Lender is a Defaulting Lender then notwithstanding the provisions of Section
11.6 it shall not be entitled to vote on any matter requiring the consent of the
Required Lenders or to object to any matter requiring the consent of all the
Lenders; provided, however, that all other benefits and obligations under the
Credit Documents shall apply to such Defaulting Lender.

         11.10 Survival of Indemnification and Representations and Warranties.
All indemnities set forth herein and all representations and warranties made
herein shall survive the execution and delivery of this Credit Agreement, the
making of the Loans, the issuance of the Letters of Credit and the repayment of
the Loans, LOC Obligations and other obligations and the termination of the
Commitments hereunder. No representation or warranty made or deemed made as of
any date pursuant to any Section or subsection of this Credit Agreement or any
other Credit Document, or any other document, certificate or statement delivered
in connection therewith, shall be deemed by reason of this Section 11.10 to have
been made or deemed made as of any other date.

         11.11  Governing Law.    THIS AGREEMENT AND THE OTHER CREDIT DOCUMENTS
AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES HEREUNDER AND
THEREUNDER SHALL BE GOVERNED BY AND CONSTRUED AND INTERPRETED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

         11.12 Waiver of Jury Trial. EACH OF THE PARTIES TO THIS AGREEMENT
HEREBY IRREVOCABLY WAIVES ALL RIGHT TO TRIAL BY JURY IN ANY ACTION, PROCEEDING
OR COUNTERCLAIM ARISING OUT OF OR RELATING TO THIS CREDIT AGREEMENT, ANY OF THE
OTHER CREDIT DOCUMENTS OR THE TRANSACTIONS CONTEMPLATED HEREBY.

         11.13 Time. All references to time herein shall be references to
Eastern Standard Time or Eastern Daylight time, as the case may be, unless
specified otherwise.

         11.14 Severability. If any provision of any of the Credit Documents is
determined to be illegal, invalid or unenforceable, such provision shall be
fully severable and the remaining provisions shall remain in full force and
effect and shall be construed without giving effect to the illegal, invalid or
unenforceable provisions.

         11.15 Entirety. This Credit Agreement together with the other Credit
Documents represent the entire agreement of the parties hereto and thereto, and
supersede all prior agreements and understandings, oral or written, if any,
including any commitment letters or correspondence relating to the Credit
Documents or the transactions contemplated herein and therein.

         11.16 Binding Effect. This Credit Agreement shall become effective at
such time when all of the conditions set forth in Section 5.1 have been
satisfied or waived by the Lenders and it shall have been executed by the
Borrower, the Guarantors and the Agents, and the Agents shall have received
copies hereof (telefaxed or otherwise) which, when taken together, bear the
signatures of each Lender, and thereafter this Credit Agreement shall be binding
upon and inure to the benefit of the Borrower, the Guarantors, the Agents and
each Lender and their respective successors and assigns.


                                       84

<PAGE>



         11.17 Confidentiality. Each Lender agrees that it will use its
reasonable best efforts to keep confidential and to cause any representative
designated under Section 7.11 to keep confidential any non-public information
from time to time supplied to it under any Credit Document; provided, however,
that nothing herein shall prevent the disclosure of any such information to (a)
the extent a Lender in good faith believes such disclosure is required by
Requirement of Law, (b) counsel for a Lender or to its accountants, (c) bank
examiners or auditors or comparable Persons, (d) any affiliate of a Lender, (e)
any other Lender, or any assignee, transferee or participant, or any potential
assignee, transferee or participant, of all or any portion of any Lender's
rights under this Agreement who is notified of the confidential nature of the
information or (f) any other Person in connection with any litigation to which
any one or more of the Lenders is a party; and provided further that no Lender
shall have any obligation under this Section 11.17 to the extent any such
information becomes available on a non-confidential basis from a source other
than a Credit Party or that any information becomes publicly available other
than by a breach of this Section 11.17.



                                       85

<PAGE>



         Each of the parties hereto has caused a counterpart of this Credit
Agreement to be duly executed and delivered as of the date first above written.

BORROWER:
                             COVANCE INC.,
                             a Delaware corporation

                             By:_______________________________
                             Name:_____________________________
                             Title:____________________________


GUARANTORS:                  COVANCE CLINICAL AND PERIAPPROVAL
                             SERVICES, INC.
                             a corporation

                             By:_______________________________
                             Name:_____________________________
                             Title:____________________________


                             COVANCE PHARMACEUTICAL PACKAGING
                             SERVICES, INC.
                             a corporation

                             By:_______________________________
                             Name:_____________________________
                             Title:____________________________


                             COVANCE LABORATORIES INC.
                             a corporation

                             By:_______________________________
                             Name:_____________________________
                             Title:____________________________


                             COVANCE RESEARCH PRODUCTS INC.
                             a corporation

                             By:_______________________________
                             Name:_____________________________
                             Title:____________________________



<PAGE>



                             COVANCE CENTRAL LABORATORY SERVICES
                             LIMITED PARTNERSHIP
 
                             By CORNING SCICOR, INC., a corporation, its
                             General Partner

                             By:_______________________________
                             Name:_____________________________
                             Title:____________________________


                             COVANCE PRECLINICAL CORPORATION
                             a corporation

                             By:_______________________________
                             Name:_____________________________
                             Title:____________________________


                             COVANCE CENTRAL LABORATORY SERVICES,INC.
                             a corporation

                             By:_______________________________
                             Name:_____________________________
                             Title:____________________________



<PAGE>



LENDERS:

                             NATIONSBANK, N.A.,
                             individually in its capacity as a
                             Lender and in its capacity as Administrative Agent

                             By:________________________________
                             Name:______________________________
                             Title:_____________________________


                             WACHOVIA BANK OF GEORGIA, N.A.,
                             individually in its capacity as a Lender and in 
                             its capacity as Syndication Agent

                             By:________________________________
                             Name:______________________________
                             Title:_____________________________




<PAGE>



Signature page to Credit Agreement, dated as of November 26, 1996, among Covance
Inc. as Borrower, certain Subsidiaries of Covance Inc. as Guarantors, the
lenders party thereto, NationsBank, N.A., as Administrative Agent and Wachovia
Bank of Georgia, N.A., as Syndication Agent.


                              BANK OF MONTREAL


                              By:______________________________
                              Name:____________________________
                              Title:___________________________




<PAGE>



Signature page to Credit Agreement, dated as of November 26, 1996, among Covance
Inc. as Borrower, certain Subsidiaries of Covance Inc. as Guarantors, the
lenders party thereto, NationsBank, N.A., as Administrative Agent and Wachovia
Bank of Georgia, N.A., as Syndication Agent.


                              FUJI BANK LTD.


                              By:_______________________________
                              Name:_____________________________
                              Title:____________________________



<PAGE>



Signature page to Credit Agreement, dated as of November 26, 1996, among Covance
Inc. as Borrower, certain Subsidiaries of Covance Inc. as Guarantors, the
lenders party thereto, NationsBank, N.A., as Administrative Agent and Wachovia
Bank of Georgia, N.A., as Syndication Agent.


                               MORGAN GUARANTY TRUST COMPANY
                               OF NEW YORK


                               By:______________________________
                               Name:____________________________
                               Title:___________________________



<PAGE>



Signature page to Credit Agreement, dated as of November 26, 1996, among Covance
Inc. as Borrower, certain Subsidiaries of Covance Inc. as Guarantors, the
lenders party thereto, NationsBank, N.A., as Administrative Agent and Wachovia
Bank of Georgia, N.A., as Syndication Agent.


                              THE BANK OF NOVA SCOTIA


                              By:_______________________________
                              Name:_____________________________
                              Title:____________________________



<PAGE>



Signature page to Credit Agreement, dated as of November 26, 1996, among Covance
Inc. as Borrower, certain Subsidiaries of Covance Inc. as Guarantors, the
lenders party thereto, NationsBank, N.A., as Administrative Agent and Wachovia
Bank of Georgia, N.A., as Syndication Agent.


                              BANQUE PARIBAS


                              By:________________________________
                              Name:______________________________
                              Title:_____________________________



<PAGE>



Signature page to Credit Agreement, dated as of November 26, 1996, among Covance
Inc. as Borrower, certain Subsidiaries of Covance Inc. as Guarantors, the
lenders party thereto, NationsBank, N.A., as Administrative Agent and Wachovia
Bank of Georgia, N.A., as Syndication Agent.


                               BARCLAYS BANK PLC


                               By:______________________________
                               Name:____________________________
                               Title:___________________________
<PAGE>



Signature page to Credit Agreement, dated as of November 26, 1996, among Covance
Inc. as Borrower, certain Subsidiaries of Covance Inc. as Guarantors, the
lenders party thereto, NationsBank, N.A., as Administrative Agent and Wachovia
Bank of Georgia, N.A., as Syndication Agent.


                                 THE CHASE MANHATTAN BANK


                                 By:_____________________________
                                 Name:___________________________
                                 Title:__________________________



<PAGE>



Signature page to Credit Agreement, dated as of November 26, 1996, among Covance
Inc. as Borrower, certain Subsidiaries of Covance Inc. as Guarantors, the
lenders party thereto, NationsBank, N.A., as Administrative Agent and Wachovia
Bank of Georgia, N.A., as Syndication Agent.


                                 CREDIT SUISSE


                                 By:_____________________________
                                 Name:___________________________
                                 Title:__________________________



<PAGE>



Signature page to Credit Agreement, dated as of November 26, 1996, among Covance
Inc. as Borrower, certain Subsidiaries of Covance Inc. as Guarantors, the
lenders party thereto, NationsBank, N.A., as Administrative Agent and Wachovia
Bank of Georgia, N.A., as Syndication Agent.


                                  THE DAI-ICHI KANGYO BANK, LTD.


                                  By:____________________________
                                  Name:__________________________
                                  Title:_________________________



<PAGE>



Signature page to Credit Agreement, dated as of November 26, 1996, among Covance
Inc. as Borrower, certain Subsidiaries of Covance Inc. as Guarantors, the
lenders party thereto, NationsBank, N.A., as Administrative Agent and Wachovia
Bank of Georgia, N.A., as Syndication Agent.


                                  FLEET NATIONAL BANK


                                  By:_____________________________
                                  Name:___________________________
                                  Title:__________________________
<PAGE>



Signature page to Credit Agreement, dated as of November 26, 1996, among Covance
Inc. as Borrower, certain Subsidiaries of Covance Inc. as Guarantors, the
lenders party thereto, NationsBank, N.A., as Administrative Agent and Wachovia
Bank of Georgia, N.A., as Syndication Agent.


                                   BANK OF TOKYO-MITSUBISHI TRUST COMPANY


                                   By:_____________________________
                                   Name:___________________________
                                   Title:__________________________
<PAGE>



Signature page to Credit Agreement, dated as of November 26, 1996, among Covance
Inc. as Borrower, certain Subsidiaries of Covance Inc. as Guarantors, the
lenders party thereto, NationsBank, N.A., as Administrative Agent and Wachovia
Bank of Georgia, N.A., as Syndication Agent.


                                    MELLON BANK, N.A.


                                    By:____________________________
                                    Name:__________________________
                                    Title:_________________________



<PAGE>



Signature page to Credit Agreement, dated as of November 26, 1996, among Covance
Inc. as Borrower, certain Subsidiaries of Covance Inc. as Guarantors, the
lenders party thereto, NationsBank, N.A., as Administrative Agent and Wachovia
Bank of Georgia, N.A., as Syndication Agent.


                                     PNC BANK, NATIONAL ASSOCIATION


                                     By:_____________________________
                                     Name:___________________________
                                     Title:__________________________



<PAGE>



Signature page to Credit Agreement, dated as of November 26, 1996, among Covance
Inc. as Borrower, certain Subsidiaries of Covance Inc. as Guarantors, the
lenders party thereto, NationsBank, N.A., as Administrative Agent and Wachovia
Bank of Georgia, N.A., as Syndication Agent.


                                     THE SANWA BANK LTD


                                     By:_____________________________
                                     Name:___________________________
                                     Title:__________________________



<PAGE>


                                                                Exhibit 2.1(g)
                                                                      to
                                                               Credit Agreement

                           FORM OF REVOLVING LOAN NOTE


                                                                          , 199

FOR VALUE RECEIVED, COVANCE INC., a Delaware corporation (the "Borrower"),
hereby promises to pay to the order of (the "Lender"), at the office of
NationsBank, N.A. (the "Administrative Agent") as set forth in that certain
Credit Agreement dated as of , 1996 among the Borrower, certain of the
Subsidiaries of the Borrower, the Lenders named therein (including the Lender),
NationsBank, N.A., as Administrative Agent, and Wachovia Bank of Georgia, N.A.,
as Syndication Agent (as the same may be amended, modified, extended or restated
from time to time, the "Credit Agreement") or at such other place or places as
the holder of this Revolving Loan Note may designate), the aggregate principal
amount of all advances made by the Lender (in the respective currencies made) as
Revolving Loans (and not otherwise repaid), in lawful money (in the currency in
which the Revolving Loan was provided) and in immediately available funds, on
the dates and in the principal amounts provided in the Credit Agreement, and to
pay interest on the unpaid principal amount of each Revolving Loan made by the
Lender, at such office, in like money and funds, for the period commencing on
the date of each Revolving Loan until each Revolving Loan shall be paid in full,
at the rates per annum and on the dates provided in the Credit Agreement.

         This Note is one of the Revolving Loan Notes referred to in the Credit
Agreement and evidences Revolving Loans made by the Lender thereunder. The
Lender shall be entitled to the benefits of the Credit Agreement. Capitalized
terms used in this Revolving Loan Note have the respective meanings assigned to
them in the Credit Agreement and the terms and conditions of the Credit
Agreement are expressly incorporated herein and made a part hereof.

         The Credit Agreement provides for the acceleration of the maturity of
the Revolving Loans evidenced by this Revolving Loan Note upon the occurrence of
certain events (and for payment of collection costs in connection therewith) and
for prepayments of Revolving Loans upon the terms and conditions specified
therein. In the event this Revolving Loan Note is not paid when due at any
stated or accelerated maturity, the Borrower agrees to pay, in addition to the
principal and interest, all costs of collection, including reasonable attorney
fees.

         Except as permitted by Section 11.3(b) of the Credit Agreement, this
Revolving Loan Note may not be assigned by the Lender to any other Person.

         The date, amount, type, currency, interest rate and duration of
Interest Period (if applicable) of each Revolving Loan made by the Lender to the
Borrower, and each payment made on account of the principal thereof, shall be
recorded by the Administrative Agent on its books; provided that the failure of
the Administrative Agent to make any such recordation shall not affect the
obligations of the Borrower to make a payment when due of any amount owing
hereunder or under this Revolving Loan Note in respect of the Revolving Loans to
be evidenced


<PAGE>


by this Revolving Loan Note, and each such recordation shall be prima facie
evidence of the obligations owing under this Revolving Loan Note absent manifest
error.

         THIS REVOLVING LOAN NOTE SHALL BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW
YORK.

         IN WITNESS WHEREOF, the Borrower has caused this Note to be executed as
of the date first above written.



                                            COVANCE INC.


                                            By:_______________________________
                                            Name:_____________________________
                                            Title:____________________________




                                                   FINAL DRAFT NOVEMBER 15, 1996








                                THE COVANCE INC.
                          EMPLOYEE STOCK OWNERSHIP PLAN

                    (EFFECTIVE AS OF ______________________)






<PAGE>





                                TABLE OF CONTENTS

INTRODUCTION..................................................................1

ARTICLE I           DEFINITIONS...............................................2

ARTICLE II          ELIGIBILITY AND PARTICIPATION.............................8

2.1                 Eligibility...............................................8

2.2                 Participation.............................................8

2.3                 Beneficiary Designation...................................8

2.4                 Notification of Individual Account Balance................9

2.5                 Diversification of Investments or Distribution for 
                    Certain Participants......................................9

ARTICLE III         CONTRIBUTIONS............................................11

3.1                 Discretionary Contributions..............................11

3.2                 Maximum Deductible Contribution..........................11

3.3                 Payment of Contributions to Trustee......................11

ARTICLE IV          ALLOCATIONS TO INDIVIDUAL ACCOUNTS.......................12

4.1                 Individual Accounts......................................12

4.2                 Allocation of Discretionary Contributions................12

4.3                 Allocation of Forfeitures................................12

4.4                 Maximum Additions........................................13

4.5                 Multiple Plan Participation..............................14

ARTICLE V           DISTRIBUTIONS............................................16

5.1                 Normal Retirement........................................16

5.2                 Disability Retirement....................................16

5.3                 Death Before Retirement or Termination of Employment.....16

5.4                 Death After Retirement or Termination of Employment......17

5.5                 Termination of Employment................................17

5.6                 Method of Payment........................................19

5.7                 Benefits to Minors and Incompetents......................19

5.8                 Payment of Benefits......................................20

5.9                 Valuation of Accounts....................................21

5.10                Direct Rollovers.........................................26

5.11                Payment to Alternate Payee Under QDRO....................23

                                       i

<PAGE>





ARTICLE VI          TRUST FUND/ESOP..........................................24

6.1                 Contributions............................................24

6.2                 Trustee..................................................24

6.3                 Employer Stock Fund......................................24

6.4                 Dividends on ESOP Stock Attributable to Exempt Loan......24

6.5                 Voting and Tender Offer Rights on Employer Stock.........25

ARTICLE VII         FIDUCIARIES..............................................26

7.1                 General..................................................26

7.2                 Corporation..............................................26

7.3                 Employer.................................................27

7.4                 Trustee..................................................27

7.5                 Committee................................................27

7.6                 Claims for Benefits......................................29

7.7                 Denial of Benefits - Review Procedure....................30

7.8                 Records..................................................30

7.9                 Missing Persons..........................................31

ARTICLE VIII        AMENDMENT AND TERMINATION OF THE PLAN ...................32

8.1                 Amendment of the Plan....................................32

8.2                 Termination of the Plan..................................32

ARTICLE IX          PROVISIONS RELATIVE TO EMPLOYERS INCLUDED IN PLAN........33

9.1                 Method of Participation..................................33

9.2                 Withdrawal...............................................33

9.3                 Adoption of ESOP by Participating Employer...............34

ARTICLE X           TOP-HEAVY PROVISIONS.....................................35

10.1                Determination of Top-Heavy...............................35

10.2                Top-Heavy Definitions....................................37

ARTICLE XI          MISCELLANEOUS............................................39

11.1                Governing Law............................................39

11.2                Construction.............................................39

11.3                Administration Expenses..................................39

11.4                Participant's Rights; Acquittance........................39

11.5                Spendthrift Clause.......................................39

11.6                Merger, Consolidation or Transfer........................39

11.7                Mistake of Fact..........................................40
  
                                     ii

<PAGE>

11.8                Counterparts.............................................40

ARTICLE XII         ADOPTION OF THE PLAN.....................................41


SUPPLEMENT A - to The Covance Inc. Employee Stock Ownership Plan - 
Employee Stock Ownership Plan (ESOP).........................................


SUPPLEMENT B - Supplemental List of Participating Employers


SUPPLEMENT C - 1996 Domestic and International Allocation Formula









                                      iii


<PAGE>



                                  INTRODUCTION

         This Plan establishes the Plan which shall be generally effective as of
the Distribution Date except as specifically noted otherwise.

         This plan document is intended to be a retirement plan qualified under
Code Section 401(a) and the separately adopted Trust Agreement is intended to
establish the Trust Fund as tax-exempt under Code Section 501(a) as part of the
Plan. This Plan is intended to operate as an "employee stock ownership plan" as
defined in Code Section 4975(e)(7) and related regulations.

         Except as otherwise noted in this Plan document, this Plan shall apply
only to Employees who work for, or continue to work for, the Employer on or
after the Distribution Date.

         As an employee stock ownership plan, the Plan is intended to provide
Employees who qualify as Participants with retirement income by investment of
Plan assets primarily in Employer securities. Plan benefits are related to the
value of Company Stock, other Employer stock, and other assets in which the Plan
is invested. Such benefits and potential stock ownership will encourage
Employees to enhance their total available retirement capital by promoting the
growth of the Employer and the appreciation of its stock value.

         The Employer intends this Plan to meet all of the applicable
requirements of ERISA and the Code, and this Plan shall be interpreted to comply
with ERISA, the Code and all final regulations and formal rulings thereunder.

         The assets of the employee stock ownership plan shall be invested
primarily in common shares of the Employer ("Employer Stock") which qualify as
"employer securities" within the meaning of section 409(1) of the Internal
Revenue Code.


                                        1





<PAGE>





                                    ARTICLE I
                                   DEFINITIONS

1.1 As used herein, unless otherwise required by the context, the following
words and phrases shall have the meanings indicated:

         Active Participant - A Participant shall be deemed an Active
Participant with respect to a Fiscal Quarter if he is employed on the last day
of such Fiscal Quarter.

         Affiliate - An organization which is not an Employer, but which must be
considered together with an Employer under Code Sections 414(b), (c), (m) or
(o).

         Base Compensation - An Employee's annualized salary for the Plan Year;
except that if the Employee is a part-time employee Base Compensation shall be
earnings reported on Form W-2, but excluding amounts for overtime, bonus or
other special compensation.

         Beneficiary - Any person designated by a Participant under Section 2.3
to receive such benefits as may become payable hereunder after the death of such
Participant.

         Board - The Board of Directors of the Corporation.

         Calendar Quarter - January 1 - March 3; April 2 - June 30; July 1 -
September 30; October 1 - December 31.

         Code - The Internal Revenue Code of 1986, as amended.

         Committee - The Benefits Administration Committee, as provided for in
Section 8.5. 

         Contributions - Payments as provided herein by the Employer to the
Trustee for the purpose of providing the benefits under this Plan.

         Corning - Corning Incorporated, a New York corporation.

         Corporation - Covance Inc. a Delaware corporation, or any successor
thereto. The Corporation is the sponsor, named Fiduciary, and plan administrator
of the Plan for purposes of ERISA as it relates to the employees of each
Employer.

         Discretionary Contributions - Contributions made by an Employer under
Section 3.3.

         Distribution Date - [ ], the effective date of the spinoff of the
Employer from Corning through the distribution of stock dividends in shares of
Corning, CCL and the Employer. 


                                        2



<PAGE>


         Effective Date - Except as specified otherwise, the Plan is effective
as of the Distribution Date.

         Eligible Employee - An Employee eligible for participation under
Section 2.1.

         Employee - Any person employed by an Employer. Notwithstanding the
preceding sentence, Employee shall not include (1) independent contractors, (2)
any person who is covered by a collective bargaining agreement where such
agreement provides for a different retirement plan, or where no provision is
made for any retirement plan after good faith bargaining between the Employer
and employee representatives and (3) any person who is excluded from
participation hereunder by the terms of his Employer's adoption of this Plan. No
person who is a leased employee of an Employer within the meaning of Code
Section 414(n), or who receives compensation solely for service as a member of
the Board, shall be eligible to participate in this Plan.


         Employer - Collectively or individually as the context may indicate,
Covance Inc. (formerly Corning Pharmaceutical Services Inc.); and any other
entity listed in Supplement B which (1) must be considered together with the
Corporation under Code Section 414(b), (c) or (m), (2) has been authorized by
the Board to adopt the Plan and (3) by action of its own board of directors
shall have adopted the Plan, or any successor to one or more of such entities.


         Employer Stock - Any class of the Employer's common stock or the
Employer's preferred stock that is convertible into common stock. Employer Stock
includes ESOP Stock.

         Employment Commencement Date - The date on which an Employee first
performs an hour of service for an Employer (even if such date is before the
Effective Date with respect to such Employer).

         ERISA - The Employee Retirement Income Security Act of 1974, as
amended.

         ESOP Stock - Employer securities within the meaning of Code section
409(1) that have been acquired with the proceeds of an Exempt Loan. Unallocated
ESOP Stock shall remain in a suspense account described in Section A-5 until
allocated to Participants' ESOP Accounts pursuant to Section A-9.

         Fiduciary - The Corporation, the Employer, the Trustee, the Committee
and any individual, corporation, firm or other entity which assumes, in
accordance with Article 



                                        3



<PAGE>



VIII, responsibilities of the Corporation, the Employer, the Trustee or the
Committee respecting management of the Plan or the disposition of its assets.

         Fund - The Trust Fund.

         Highly Compensated Employee - (a) For any Plan Year, any employee
described in subsection (b) or (c).

         (b) Any employee who during the immediately preceding Plan Year:

             (1) was at any time a 5-percent owner (as defined in Code Section
416(i)(l));

             (2) received compensation (as defined in Code Section 414(q)(7))
from an Employer or an Affiliate in excess of $50,000 (as adjusted under Code
Section 414(q)(1)); or

             (3) was at any time an officer and received compensation (as
defined in Code Section 414(q)(7)) from an Employer or an Affiliate greater than
50 percent of the amount in effect under Code Section 415(b)(1)(A) for such
year.

         (c) Any employee who during the current Plan Year:

             (1) was at any time a 5-percent owner (as defined in Code Section
416(i)(l));

             (2) received compensation (as defined in Code Section 414(q)(7))
from an Employer or an Affiliate in excess of $50,000 (as adjusted under Code
Section 414(q)(1)) and was one of the 100 employees receiving the most
compensation (as defined in Code Section 414(q)(7)); or

             (3) was at any time an officer who received compensation (as
defined in Code Section 414(q)(7)) from an Employer or an Affiliate greater than
50 percent of the amount in effect under Code Section 415(b)(1)(A) for such year
and was one of the 100 employees receiving the most compensation (as defined in
Code Section 414(q)(7).

         This definition shall be applied in accordance with Code Section 414(q)
and the regulations issued thereunder.

         (d) For purposes of applying the HC Family Member aggregation rules
under this Plan, Highly Compensated Employee shall also include former employees
who separated prior to the Plan Year being tested and who met the definition of
Highly 

                                       4
<PAGE>


Compensated Employee in either (1) the Plan Year in which they separated or (2)
any Plan Year ending on or after their 55th birthday.

         HC Family Member - With respect to a Highly Compensated Employee who is
either a 5% owner or one of the ten most highly compensated Employees, the
spouse and the lineal ascendants and descendants (and spouses of such ascendants
and descendants) of any such Highly Compensated Employee.

         Individual Account - That portion of Participant's Discretionary
Contributions allocated to such Participant under Section 4.4 and any earnings
or losses on such contribution.

         Limitation Year - The Limitation Year is January 1 - December 31.

         Normal Retirement Age - Age 65.

         Participant - Any Employee or former Employee who has an Individual
Account balance and any Employee who has met the eligibility requirements of
Section 2.1. Participation ends in accordance with Section 2.2.

         Period of Severance - The period of time commencing on an Employee's
Severance from Service Date and ending on his Reemployment Commencement Date.

         Plan - The Covance Inc. Employee Stock Ownership Plan as contained
herein or as duly amended

         Plan Year -The Plan Year is January 1 - December 31.

         Reemployment Commencement Date - The first date on which an Employee
again performs an hour of service following a Period of Severance.

         Section 415 Compensation - An Employee's wages as defined in Code
Section 3401(a) and all other payments of compensation to an Employee by an
Employer (in the course of the Employer's trade or business) for which the
Employer is required to furnish the Employee a written statement under Code
Sections 6041(d) and 6051(a)(3). Section 415 Compensation shall be determined
without regard to any rules that limit the remuneration included in wages based
on the nature or location of the employment or the services performed (such as
the exception for agricultural labor in Code Section 3401(a)(2)). Section 415
Compensation does not include employee pre-tax contributions to a qualified Plan
and salary reduction contributions to a Code Section 125 cafeteria plan.



                                        5

<PAGE>

         Severance from Service Date - The date on which an Employee quits,
retires, is discharged or dies, provided he does not earn an hour of service for
an Employer within 12 months after such date.

         Testing Compensation - For each Participant, the Section 415
Compensation paid to an Employee by the Employer for his services, excluding
reimbursements or other expense allowances, cash and non-cash fringe benefits
(e.g., employee discounts), moving expenses, deferred compensation and welfare
benefits, plus any employee pre-tax contributions to a qualified defined
contribution plan and salary reduction contributions to a Code Section 125
cafeteria plan. Testing Compensation in excess of $160,000 (or such different
amount as may be applicable under Code Section 401(a)(17)(B)) shall not be taken
into account.

         Total and Permanent Disability - A Participant shall be considered
totally and permanently disabled once the Committee, in its sole discretion,
determines that he has incurred a disability which renders him totally and
permanently unable to satisfactorily perform his usual duties for his Employer
or the duties of such other position which the Employer makes available to him
and for which he is qualified by reason of his training, education or
experience. Such determination shall be made by the Committee based on medical
reports and such other evidence which the Committee determines to be
satisfactory; provided, however, that conclusive evidence that the Participant
is eligible for and is receiving disability benefits under the provisions of the
Federal Social Security Act shall be sufficient to deem the Participant totally
and permanently disabled.

         Trust Agreement - The agreement entered into between the Employer and
the Trustee under Article VII.

         Trust Fund - All funds received by the Trustee together with all
income, profits and increments thereon, and less any expenses or payments made
out of the Trust Fund.

         Trustee - Such individual, individuals, financial institution, or a
combination of them as shall be designated in the Trust Agreement to hold in
trust any assets of the Plan for the purpose of providing benefits under the
Plan, and shall include any successor trustee to the Trustee initially
designated thereunder.

         Valuation Date - The date on which a Participant's Individual Account
is valued pursuant to Section 5.9. Subject to Section 5.9(b), the Valuation Date
shall be a date that 

                                       6
<PAGE>

falls as soon as administratively feasible after a properly-completed written
request for a distribution is received by an authorized representative of the
Committee.

         Year of Vesting Service - (a) As of any date, the aggregate of an
Employee's periods of vesting service, including any vesting service credited
under subsection (b) and excluding any vesting service disregarded under
subsection (c). For purposes of this subsection (a), a period of
vesting service is each period of time required to be recognized under this Plan
commencing on the later of the Effective Date of this Plan, the Employee's
Employment Commencement Date, or any subsequent Reemployment Commencement Date,
and ending on a Severance from Service Date.

                  (b) Vesting service shall also include the following:

                      (1) Periods of employment with an Affiliate (while such
organization is an Affiliate) which would have constituted vesting service had
the Participant been employed by an Employer shall be included as if such
periods had been performed for an Employer; and

                      (2) Periods of employment with an Employer other than as
an Employee, including employment as a leased employee within the meaning of
Code Section 414(n), which would have constituted vesting service had the
Participant been employed as an Employee shall be included as if such periods
had been performed as an Employee.

                  (c) Years of Vesting Service on or after the Effective Date
recognized under the preceding subsections shall not include any vesting service
earned prior to a five-year Period of Severance if, when the Period of Severance
commenced, the Employee Individual Account under Sections 5.5 or 10.1.


                                        7



<PAGE>

                                   ARTICLE II
                          ELIGIBILITY AND PARTICIPATION

2.1      Eligibility

         An Employee who has completed an hour of service on the Effective Date
shall be a Participant. Each other Employee shall become a Participant on the
date following the Effective Date on which he completes an hour of service with
an Employer. 

2.2      Participation

         Each person who becomes a Participant shall remain a Participant so
long as he remains an Employee or maintains an Individual Account balance. If a
Participant terminates employment with no balance in his Individual Account, he
shall cease being a Participant upon his termination of employment. In the event
an Employee ceases to be a Participant and is later reemployed as an Employee,
he shall once again become a Participant upon his reemployment date. 

2.3       Beneficiary Designation

         (a) Upon commencing participation, each Participant shall designate a
Beneficiary by filing a properly-completed form with an authorized
representative of the Committee. In the absence of any valid designation of
Beneficiary, the Participant shall be deemed to have designated his spouse as
his Beneficiary, and if the Participant is unmarried upon his death, he shall be
deemed to have designated his estate as his Beneficiary.

         (b) The Beneficiary of a married Participant shall be his spouse unless
the Participant designates someone other than his spouse as his Beneficiary, and
the Participant files with an authorized representative of the Committee his
spouse's written consent to such designation. Such spousal consent shall be on a
form approved by the Committee, shall be irrevocable by the spouse, shall
acknowledge the effect of such designation and shall be witnessed by a Committee
member (or an authorized representative) or a notary public. The spouse may
alternatively execute an irrevocable general consent that does not identify the
designated Beneficiary and which allows the Participant to make future changes
in the Beneficiary designation without spousal consent. Any such general consent
shall satisfy the requirements of Treasury Regulation ss.1.401(a)-20 Q&A-31(c).


                                        8



<PAGE>


         (c) If an unmarried Participant later marries, or if a married
Participant later remarries, any prior designation by such Participant of a
Beneficiary other than the spouse to whom he is married on his date of death
shall be null and void unless consented to by such spouse in the manner provided
in subsection (b).

         (d) The interpretation of the Committee with respect to any Beneficiary
designation, subject to applicable law, shall be binding and conclusive upon all
parties, and no person who claims to be a Beneficiary, or any other person,
shall have the right to question any action of the Committee.

         (e) The rights of any spouse or Beneficiary hereunder shall be subject
to the provisions of any qualified domestic relations order within the meaning
of ERISA Section 206(d)(3).

2.4      Notification of Individual Account Balance

         As of the last day of each Plan Year (or such other earlier period
during the year), the Committee shall notify each Participant of the amount of
his share in the Contributions for the period just completed and the balance of
his Individual Account, including distributions, if any, since the effective
date of the last statement. Such notification shall be provided within a
reasonable period of time following the end of the Plan Year. 

2.5      Diversification of Investments or Distribution for Certain Participants

         For purposes of this Section 2.5, "Qualified Participant" shall mean a
Participant who has completed at least five years of participation in the Plan.

         "Qualified Election Period" shall mean the period of six Plan Years
beginning with the later of (i) the Plan Year in which the Participant first
becomes a Qualified Participant, or (ii) the Plan Year which includes the tenth
anniversary of the Distribution Date; provided that the Qualified Election
Period shall not begin unless and until the fair market value of Employer Stock
allocated to the Participant's ESOP Account is at least $500 as of any Valuation
Date.

         No later than 90 days after the last day of each Plan Year during his
Qualified Election Period, each Qualified Participant shall be permitted to
direct the Plan as to the investment of 100 percent (100%) of an amount equal to
the value of his Individual Account attributable to Employer Stock. The
Participant's direction shall be provided to 

                                       9

<PAGE>

the Committee in writing and shall be effective no later than 180 days after the
close of the Plan Year to which the direction applies.

         The Plan shall satisfy the Participant's direction by transferring the
portion of his Account that is covered by the election to another qualified plan
(including the portion of this Plan that does not constitute an ESOP) of the
Employer that accepts the transfer and permits employee-directed investments
and offers the Participant at least three investment options (not inconsistent
with regulations prescribed by the Secretary of the Treasury) other than
Employer Stock. The transfer shall be made, and the amount transferred shall be
invested in accordance with the Participant's election, no later than 90 days
after the last day of the period during which the election can be made. If at
the time of an election no Employer then maintains a qualified plan that is
eligible to receive the portion of the Participant's Account that is covered by
the election, the Plan shall distribute that portion to the Qualified
Participant within 90 days after the last day of the period during which the
election can be made, subject to the requirements of Section A-11 concerning put
options. This Section shall apply notwithstanding any other provision of the
Plan, other than such provisions as require the consent of the Participant to a
distribution with a present value in excess of $3,500. If the Participant does
not consent to such a distribution, the amount as to which the election is made
shall be retained in the Plan and the diversification requirement of this
Section shall be deemed to have been satisfied.

                                       10



<PAGE>


                                   ARTICLE III
                                  CONTRIBUTIONS

3.1      Discretionary Contributions

         To the extent permitted under the terms of the Plan, the Code and
ERISA, the Corporation shall make a Discretionary Contribution as of the last
day of the first Plan Year for each Participant who was an active Participant
during the Plan Year, which amount shall be allocated in accordance with Section
4.2 As of the last day of each Plan Year thereafter, the Corporation, at the
discretion of the Board, may make a Discretionary Contribution. Such
Discretionary Contribution, if made, shall be expressed as a percentage of Base
Compensation and shall be allocated in accordance with Section 4.2. No
Discretionary Contribution shall be made with respect to any Participant who is
not an Active Participant for the applicable Plan Year. The Employer shall also
contribute sufficient Discretionary Contributions as may be required by Section
10.1(b). Notwithstanding the foregoing, no contribution shall be made and
allocated under Section 4.2 to the extent it would cause the Participant to
exceed the maximum additions under Section 4.4 for the Plan Year. 

3.2      Maximum Deductible Contribution

         In no event shall the Employer be obligated to make a Contribution for
a Plan Year in excess of the maximum amount deductible by it under Code Section
404(a)(3). 

3.3      Payment of Contributions to Trustee

         Unless an earlier time for contribution is specified elsewhere in this
Plan, in all events the Employer shall pay to the Trustee its Contributions for
each Plan Year within the time prescribed by law, including extensions of time
for the filing of its federal income tax return for the Employer's taxable year
during which such Plan Year ended.

                                       11



<PAGE>
                                   ARTICLE IV
                       ALLOCATIONS TO INDIVIDUAL ACCOUNTS

4.1      Individual Accounts

         (a) The Committee shall establish and maintain an Individual Account in
the name of each Participant, compromised of Discretionary Contributions and
investment earnings thereon, to which the Committee shall credit all amounts
allocated to each such Participant under this Article IV.

         (b) Separate accounts shall be maintained for all former Employee
Participants who have an interest in the Plan.

         (c) The maintenance of separate accounts shall not require a
segregation of the Trust assets and no Participant shall acquire any right to or
interest in any specific asset of the Trust as a result of the allocations
provided for in the Plan.

4.2      Allocation of Discretionary Contributions

         (a) A Participant's allocable share as determined under subsection (b)
of the Discretionary Contribution shall be credited to the Participant's
Individual Account as of the last day of each Plan Year for which the
Corporation shall make a Discretionary Contribution under Section 3.1 and shall
be invested in Employer Stock.

         (b) Each Participant who is an Active Participant for the Plan Year
with respect to which the Corporation makes a Discretionary Contribution shall
receive an allocation of the Discretionary Contribution. No other Participant
shall receive an allocation. Each Active Participant shall receive an amount
equal to the Discretionary Contribution, multiplied by a fraction where the
numeration is the Participant's Base Compensation and the denominator is the sum
of the Base Compensation of all Active Participants. Notwithstanding the
foregoing, the Corporation may designate that all or any portion of a
Discretionary Contribution shall be allocated only to new Participants during
the Plan Year based on Base Compensation and in accordance with the above
allocation formula. 

4.3      Allocation of Forfeitures

         As of the last day of each Plan Year, any forfeitures arising under
Section 5.5(c) shall be used to the extent necessary to restore a Participant's
Individual Account as provided in Section 5.5(c)(1), and/or shall be allocated
to new Participants during the Plan Year ending December 31, 1997 and December
31, 1998 based on the ratio of the



                                       12



<PAGE>


new Participant's Base Compensation to the Base Compensation of all such new
Participants for the Plan Year. Notwithstanding the foregoing, for Plan Years
ending December 31, 1999 and 2000, any forfeitures shall be allocated to all
Active Participants in accordance with Section 4.2 (b). 

4.4      Maximum Additions

         (a) Notwithstanding anything herein to the contrary but subject to
subsection (b), the sum of the Discretionary Contributions allocated to a
Participant's Individual Account for any Limitation Year (the "Annual
Additions"), when combined with any annual additions credited to the Participant
for the same period under another qualified defined contribution plan maintained
by the Employer or an Affiliate, shall not exceed the lesser of the following:

              (1) $30,000 or such larger amount as may be determined under Code
Section 415(c)(1)(A); or

              (2) 25% of the Participant's total Section 415 Compensation
received from the Employer for such Limitation Year.

         (b) In the event a Participant is covered by more than one defined
contribution plan maintained by the Employer (or an Affiliate), the maximum
Annual Additions to this Plan shall be decreased as determined necessary by the
Employer to insure that the limitations of Code Section 415(c) are not exceeded.

         In the event that corrective adjustments in the Annual Additions to any
Individual Accounts are required due to a reasonable error in estimating a
Participant's compensation that may be made with respect to any Participant
under the annual additions limit of Sections 4.4(a) and (b), the adjustment
shall first be made by reducing the Discretionary Contributions provided under
this Plan, employer contribution under any qualified defined contribution plan
maintained by the Employer, and next any employee pre-tax contributions.

          Any amounts withheld or taken from a Participant's Individual
Account pursuant to the above shall be segregated in the Trust Fund in a
separate account and applied toward the Contribution of the Employer for the
next Limitation Year for the affected Participant, including a special
Discretionary Contribution under section 4.2(b) earmarked exclusively for that
Participant, subject to satisfying any restriction under section 401(a)(y) of
the code with regard to all such special contributions.



                                       13



<PAGE>


         (c) A Participant's annual additions with respect to Employer Stock
allocable to an Exempt Loan shall be determined on the basis of the lesser of
contributions thereto or the value of Employer Stock released from the Suspense
Account and, if no more than one third of any employer matching contributions
which are deductible under Section 404(a)(9) of the Code by reason of their
application to make payments on an Exempt Loan are allocated to Highly
Compensated Employees, a Participant's annual additions shall not include
employer contributions which are deductible under Section 404(a)(9)(B) of the
Code by reason of their applications to the payment of interest on an Exempt
Loan or forfeitures of Employer Stock attributable to an Exempt Loan.

4.5      Multiple Plan Participation

         (a) If a Participant is a participant in a defined benefit plan
maintained by the Employer, the sum of his defined benefit plan fraction
(determined in subsection (c)) and his defined contribution plan fraction
(determined in subsection (b)) for any Limitation Year may not exceed 1.0.

         (b) The term "defined contribution plan fraction" shall mean a
fraction, the numerator of which is the sum of all of the Annual Additions to
the Participant's Individual Account under this Plan as of the close of the
Limitation Year and the denominator of which is the sum of the lesser of the
following amounts determined for such Limitation Year and for each prior
Limitation Year of employment with the Employer:

              (1) the product of 1.25 multiplied by the dollar limitation in
effect under Section 4.6(a)(1) for such Year; or

              (2) the product of 1.4 multiplied by an amount determined under
Section 4.6(a)(2) for such Year.

         (c) The term "defined benefit plan fraction" shall mean a fraction the
numerator of which is the Participant's projected annual benefit determined as
of the close of the Limitation Year and the denominator of which is the lesser
of:

              (1) the product of 1.25 multiplied by the dollar limitation in
effect under Code Section 415(b)(1)(A) for such Limitation Year; or

              (2) the product of 1.4 multiplied by the amount which may be taken
into account under Code Section 415(b)(1)(B) with respect to each individual
under the Plan for such Limitation Year.

                                       14



<PAGE>



         For purposes of this limitation, all defined benefit plans maintained
by an Employer (or any Affiliates), whether or not terminated, are to be treated
as one defined benefit plan and all defined contribution plans maintained by an
Employer (or any Affiliates), whether or not terminated, are to be treated as
one defined contribution plan. The extent to which the annual benefit under any
defined benefit plans shall be reduced in order to achieve compliance with the
limitations of Code Section 415 shall be determined in such a manner so as to
maximize the aggregate benefits payable to such Participant. If such reduction
is under this Plan, the Committee shall advise affected Participants of any
additional limitation on their annual benefits required by this Section.

         (d) The above limitations in Section 4.4 and this Section 4.5 are
intended to comply with the provisions of Code Section 415 so that the maximum
benefits able to be provided by plans of the Employer shall be exactly equal to
the maximum amounts allowed under Code Section 415. If there is any discrepancy
between the provisions of Section 4.4 or this Section 4.5 and the provisions of
Code Section 415, such discrepancy shall be resolved in such a way as to give
full effect to the provisions of Code Section 415, which provisions are hereby
incorporated by reference.




                                       15



<PAGE>


                                    ARTICLE V
                                  DISTRIBUTIONS

5.1      Normal Retirement

         Upon the retirement of a Participant on or after attaining his Normal
Retirement Age, the value of his Individual Account (as determined under Section
5.9) shall become 100% vested and shall become payable as soon as
administratively feasible following his retirement. The Committee shall
thereupon direct the Trustee to distribute to the retiring Participant such
amount in accordance with Section 5.6. 

5.2      Disability Retirement

         (a) A Participant may retire from the employment of the Employer on the
first day of any month coincident with or next following a determination by the
Committee that the Participant has incurred a Total and Permanent Disability.
Upon the retirement of a Participant under this Section 5.2, the value of his
Individual Account (as determined under Section 5.9) shall become 100% vested
and shall become payable as soon as administratively feasible following his
retirement. The Committee shall thereupon direct the Trustee to distribute to
the retiring Participant such amount in accordance with Section 5.6.

         (b) Notwithstanding anything herein to the contrary, a Participant who
retires in accordance with this Section 5.2 shall (1) have the right to delay
receipt of his disability retirement benefit until the time required by Section
5.8(b), and (2) if deferred benefit commencement is elected, have the right at
any time subsequent to his disability retirement date but prior to the time
required by Section 5.8(b) to request benefit commencement at some earlier date.

5.3      Death Before Retirement or Termination of Employment

         Upon the death of a Participant before retirement or termination of
employment, the value of such Participant's Individual Account (as determined
under Section 5.9) shall become 100% vested and shall become payable as soon as
administratively feasible following his death. Subject to subsection (b), the
Committee shall direct the Trustee to distribute to the deceased Participant's
Beneficiary such amount in accordance with Section 5.6.



                                       16



<PAGE>





5.4      Death After Retirement or Termination of Employment

         Upon the death of a Participant who has terminated employment and who
is not receiving benefit payments in accordance with a form of distribution
under Section 5.6, the value of the vested portion of such Participant's
Individual Account (as determined under Section 5.9) shall become payable as
soon as administratively feasible following his death. (For any Participant who
is receiving benefit payments in accordance with a form of distribution under
Section 5.6, the provisions of such form of distribution shall control any
payments upon the death of such Participant.) The Committee shall direct the
Trustee to distribute to the deceased Participant's Beneficiary such amount in
accordance with Section 5.6.

5.5      Termination of Employment

         (a) Upon termination of employment for any reason other than retirement
under Section 5.1 or 5.2, or death, a Participant shall be entitled to the value
of the vested portion of his Individual Account (as determined under Section
5.9) and payable at the time set forth in subsection (b). A Participant's
Individual Account shall vest on the earlier of two years and one day from the
date of the initial allocation to the Participant or after earning five Years of
Vesting Service, provided that all amounts shall become fully vested as of
December 31, 2000.

         (b) (1) As soon as administratively feasible following a Participant's
termination of employment, the Committee shall direct the Trustee to distribute
to such Participant the value of the vested portion of his Individual Account
(as determined under Section 5.9). Notwithstanding the preceding sentence, if
the amount to be distributed under this subsection (b) exceeds (or at the time
of any prior distribution exceeded) $3,500, then no distribution shall be made
prior to the Participant attaining his Normal Retirement Age unless he consents
in writing to the making of such distribution. The consent of the Participant
shall be obtained in writing within the 90-day period ending on the date
distribution commences. The Participant shall be given a written notice of the
right to defer any distribution until the Participant's Individual Account
balance is no longer immediately distributable. Such notification shall be
provided no less than seven days and no more than 90 days prior to the date
distribution commences and shall inform 


                                       17

<PAGE>


the Participant that he has a right to a period of at least 30 days after
receiving the notice to consider the decision of whether or not to elect a
distribution.


              (2) As soon as administratively feasible following the attainment
of Normal Retirement Age on the part of a Participant who has previously
terminated his employment but the distribution of whose benefit has not
commenced, the Committee shall direct the Trustee to distribute to such
Participant the value of his Individual Account (as determined under Section
5.9) in a lump sum payment.

         (c) If a Participant's employment terminates for any reason other than
retirement or death at a time when he is not fully vested in his Individual
Account, then the Committee shall follow the procedure set forth in paragraph
(1) or that set forth in paragraph (2) below, as appropriate:

              (1) If the vested portion of the Individual Account is distributed
to him at any time before the end of the second Plan Year following the Plan
Year in which his employment terminated, the remaining portion of such Accounts
shall be forfeited as of the date of such termination of employment. However, if
the Participant had no vested interest in his Individual Account at the time of
his termination of employment, the Committee nonetheless shall treat the
Participant as if he had received a distribution on the date his employment
terminated and shall forfeit the Participant's Individual Account on the date
his employment terminated. If the former Participant returns as an Employee
prior to incurring a one-year Period of Severance beginning immediately after
the date of his distribution (or on the date his employment terminated in the
case of a former Participant who had no vested interest in Individual Account on
the date his employment terminated), then his Account, determined as of the date
of the distribution of his vested interest, shall be fully restored to him as of
the end of the Plan Year in which such repayment occurred. In such case, the
Participant's Individual Account shall be restored first out of forfeitures for
such Plan Year and, if such forfeitures are insufficient to restore such
Account, the Employer shall make a special contribution to the extent necessary
so that the Participant's Account is fully restored. 

              (2) If a Participant's vested interest in his Individual Account
is distributed to him under section 5.6 (or is deemed to be distributed to the
Participant), any portion of such Accounts which is not vested shall be
forfeited immediately. 



                                       18



<PAGE>




         (d) In the event a Participant who terminated his employment with an
Employer is reemployed as an Employee prior to receiving a distribution of his
Individual Account, he shall not be entitled to a distribution as provided in
this Section 5.5 due to such termination, but shall be entitled to a
distribution as determined herein upon any subsequent termination of employment
for any reason.

5.6      Method of Payment

         Benefit payments hereunder shall be made in a lump sum. Furthermore,
distributions to a Participant (or to his Beneficiary if the Participant dies
before distribution of his benefit has commenced), the value of the vested
portion of whose Individual Account does not exceed (or at the time of any prior
distribution did not exceed) $3,500, automatically shall be made in a lump sum.
A Participant who is not vested in any portion of his Individual Account shall
be deemed to distributed to the Participant. Payment from investments held in
Employer Stock may be distributed in cash or in stock, at the direction of the
Participant. Payments from other investment accounts shall be made only in cash.

5.7      Benefits to Minors and Incompetents

         (a) In case any person entitled to receive payment under the Plan shall
be a minor, the Committee, in its discretion, may distribute such payment in any
one or more of the following ways:

              (1) By payment thereof directly to such minor;

              (2) By application thereof for the benefit of such minor;

              (3) By payment thereof to either parent of such minor or to any
person who shall be legally qualified and shall be acting as guardian of the
person or the property of such minor, provided the parent or adult person to
whom any amount shall be paid shall have advised the Committee in writing that
he will hold or use such amount for the benefit of such minor.

         (b) In the event a person entitled to receive payment under the Plan is
physically or mentally incapable of personally receiving and giving a valid
receipt for any payment due (unless prior claim therefor shall have been made by
a duly qualified legal representative of such person), such payment in the
discretion of the Committee may be 

                                       19

<PAGE>

made to the spouse, son, daughter, parent, brother or sister of the recipient or
to any other person who is responsible for the welfare of such recipient.

         (c) Any payments made under subsections (a) or (b) shall, to the extent
of the payments, fully discharge the obligations of the Committee and the Plan
to any other person making a claim hereunder with respect to such payments.

5.8      Payment of Benefits

         (a) Except as provided in subsection (b), in the event a Participant's
Individual Account shall be due and payable under this Article V and the
Participant has not elected otherwise in accordance with the Plan, any payment
of benefits to the Participant shall begin not later than 60 days after the
close of the Plan Year in which occurs the latest of:

              (1) the date on which the Participant attains age 65;

              (2) the 10th anniversary of the date in which the Participant
commenced participation in the Plan; and

              (3) termination of employment of the Participant with the
Employer.

         (b) Notwithstanding subsection (a) above, distribution of a
Participant's benefit shall be made no later than April 1 of the calendar year
following the calendar year during which such Participant attains age 70 1/2,
regardless of whether or not he has terminated employment with the Employer.
Such distribution shall be made over a period not extending beyond the life or
life expectancy of the Participant or the joint lives or life expectancies of
the Participant and a designated Beneficiary. Life expectancies shall be
determined at the time payments commence and shall not thereafter be
recalculated.

         (c) If a Participant dies before distribution of his benefit has
commenced, the Participant's entire benefit shall be distributed within five
years after his death. The preceding sentence shall not apply to any portion of
the Participant's benefit if the following requirements in paragraphs (1) and,
if applicable, (2) are met with respect to such portion:

              (1) (A) if the portion of the Participant's benefit is payable to
or for the benefit of a designated Beneficiary;

                  (B) such portion will be distributed over a period not
extending beyond the life expectancy of such Beneficiary at the time payments
commence; and

                                       20

<PAGE>

                  (C) such distributions begin not later than December 31 of the
calendar year following the calendar year of the Participant's death.

              (2) If the designated Beneficiary referred to in paragraph (1)(A)
above is the surviving spouse of the Participant, then the date on which the
distributions are required to begin under paragraph (1)(C) shall not be earlier
than December 31 of the calendar year in which the Participant would have
attained age 70 1/2.

              If the surviving spouse dies before the distributions to such
spouse begin, this Section 5.8(c) (with the exception of paragraph (2)) shall be
applied as if the surviving spouse were the Participant.

              This Section 5.8(c) shall not apply if the distribution of the
Participant's benefit has commenced prior to his death and the remaining portion
of the Participant's benefit will be distributed at least as rapidly as under
the method of distribution being used at the date of the Participant's death.

              For purposes of this Section 5.8(c), under regulations to be
prescribed by the Secretary of the Treasury, any amount paid to a child shall be
treated as if it had been paid to the surviving spouse upon such child reaching
the age of majority (or other designated event prescribed under such
regulations).

         (d) Distributions under this Article V shall be made in accordance with
regulations issued by the Secretary of the Treasury under Code Section
401(a)(9), including Treasury Regulation ss.1.401(a)(9)-2, which regulations
shall override any distribution options in this Plan inconsistent with Section
401(a)(9). 

5.9 Valuation of Accounts

         All distributions hereunder shall be based upon the value of the
Participant's Individual Account as determined under this Section 5.9.

         (a) The value of a Participant's Individual Account upon a distribution
hereunder is the product of (A) the per unit value of the Employer Stock Fund
and (B) the number of units of such fund allocated to the Participant's
Individual Account as of such Valuation Date.

         (b) If a Discretionary Contribution is made on behalf of a Participant
after the date on which his Individual Account is valued under subsection (a),
the Participant shall receive an additional distribution equal to the amount of
the Discretionary Contribution and any earnings or losses thereon. Such
additional distribution shall be valued in the 


                                       21


<PAGE>

same manner as the Participant's Individual Account was valued under subsection
(a), except that the Valuation Date shall be a date that falls as soon as
administratively feasible after the Discretionary Contribution is made.

5.10     Direct Rollovers

         (a) Notwithstanding any provision of the Plan to the contrary that
would otherwise limit a distributee's election under this Section, a distributee
may elect, at the time and in the manner prescribed by the Committee, to have
any portion of an eligible rollover distribution paid directly to an eligible
retirement plan specified by the distributee in a direct rollover.

         (b) (1) An "eligible rollover distribution" is any distribution of all
or any portion of the balance to the credit of the distributee, except that an
eligible rollover distribution does not include: any distribution that is one of
a series of substantially equal periodic payments (not less frequently than
annually) made for the life (or life expectancy) of the distributee or the joint
lives (or joint life expectancies) of the distributee and the distributee's
designated beneficiary, or for a specified period of ten years or more; any
distribution to the extent such distribution is required under Section 401(a)(9)
of the Code; and the portion of any distribution that is not includible in gross
income (determined without regard to the exclusion for net unrealized
appreciation with respect to employer securities).

              (2) An "eligible retirement plan" is an individual retirement
account described in section 408(a) of the Code, an individual retirement
annuity described in section 408(b) of the Code, an annuity plan described in
section 403(a) of the Code, or a qualified defined contribution plan described
in section 401(a) of the Code, that accepts the distributee's eligible rollover
distribution. However, in the case of an eligible rollover distribution to the
surviving spouse, an eligible retirement plan is an individual retirement
account or individual retirement annuity.

              (3) A "distributee" includes an employee or former employee. In
addition, the employee's or former employee's surviving spouse and the
employee's or former employee's spouse or former spouse who is the alternate
payee under a qualified domestic relations order, as defined in Section 414(p)
of the Code, are distributees with regard to the interest of the spouse or
former spouse.

                                       22

<PAGE>

              (4) A "direct rollover" is a payment by the Plan to the eligible
retirement plan specified by the distributee.

5.11     Payment to Alternate Payee Under QDRO

         Notwithstanding any other provision of this Plan, once the Committee
determines that a domestic relations order is a qualified domestic relations
order ("QDRO") within the meaning of Section 206(d)(3) of ERISA, unless the QDRO
specifically provides otherwise, the Committee shall direct the Trustee to
distribute, as soon as administratively feasible following the date on which the
Committee determines that the domestic relations order is a QDRO, to the
alternate payee named in the QDRO the benefit provided therein in a lump sum.








                                       23



<PAGE>



                                   ARTICLE VI
                                   TRUST FUND

6.1      Contributions

         Contributions by the Employer as provided for in Article III shall be
paid over to the Trustee. All Contributions by the Employer shall be
irrevocable, except as otherwise provided in this Plan and may be used only for
the exclusive benefit of the Participants and their Beneficiaries. The
Employer's Contribution will be made either in cash or in Employer Stock, or
partially in each. 

6.2      Trustee

         The Corporation will maintain an agreement with the Trustee whereunder
the Trustee will receive, invest and administer as a trust fund Contributions
made under this Plan in accordance with the Trust Agreement.

         Such Trust Agreement is incorporated by reference as a part of the
Plan, and the rights of all persons entitled to benefits hereunder are subject
to the terms of the Trust Agreement. The Trust Agreement specifically provides,
among other things, for the investment and reinvestment of the Fund and the
income thereof, the management of the Fund, the responsibilities and obligations
of the Trustee, removal of the Trustee and appointment of a successor,
accounting by the Trustee and the disbursement of the Fund.

         The Trustee shall, in accordance with the terms of such Trust
Agreement, accept and receive all sums of money paid to it from time to time by
the Employer, and shall hold, invest, reinvest, manage and administer such
moneys and the increment, increase, earnings and income thereof as a trust fund
for the exclusive benefit of the Participants and their Beneficiaries and for
the payment of reasonable expenses of administering the Plan.

6.3      Employer Stock Fund

         The Employer Stock Fund shall be invested in the common stock of the
Employer, provided such stock qualifies as qualifying employer securities within
the meaning of ERISA Section 407(d)(5). The level of Plan assets invested in
such fund may consist of up to 100% of all Plan assets.

6.4      Dividends on ESOP Stock Attributable to Exempt Loan

         It is anticipated that all dividends payable with respect to shares of
ESOP Stock held in the Suspense Account shall be used for the purpose of
repaying one or more 

                                       24

<PAGE>

Exempt Loans and will not be allocated to Participants' Individual Accounts
invested in Employer Stock and that all dividends payable with respect to all
other Employer Stock held in the Trust Fund shall be added to the Participants'
Employer Stock Fund, subject to Section A-6. Nevertheless, the Committee may, in
its sole discretion, determine for any Plan Year that dividends payable with
respect to shares of ESOP Stock shall, if payable in cash (i) paid currently to
Participants or (ii) used for the purpose of repaying one or more Exempt Loans
if such use of said dividends so applied meets the requirements of Code Section
404(k). Such discretion herein granted may be exercised by the Committee
independently, and in whole or in part, with respect to the stock held from time
to time in one or more of Employer Stock Funds established under the Trust.
Discretion so exercised for any Plan Year, or for any portion thereof, may be
changed by the Committee at any subsequent time. Cash dividends which are to be
paid to the Participants may be paid directly by the Company or may be paid by
the Trustee within ninety (90) days after the end of the Plan year or receipt by
the Trustee.

6.5      Voting and Tender Offer Rights n Employer Stock

         Each Participant shall have the right to vote all shares of Employer
Stock held in the Participant's accounts. Each Participant shall also have the
right to direct the Trustee whether to tender such shares of Stock in the event
an offer is made by any person other than the Employer to purchase such shares.
The Committee shall make any such arrangements with the Trustee as may be
appropriate to pass such voting or tender offer rights through to a Participant.
In the event a Participant fails to vote his shares or fails to indicate his
preference with respect to a tender offer, the Trustee shall vote the
Participant's shares or tender his shares in the same proportions as those Plan
Participants who did respond cast their votes or tendered their shares. The
Trustee shall also vote and exercise any tender offer rights with respect to
unallocated ESOP Stock held in a suspense account in the same proportions as
those Plan Participants who responded cast their votes or tendered their shares.

                                       25



<PAGE>

                                   ARTICLE VII
                                   FIDUCIARIES


7.1      General

         Each Fiduciary who is allocated specific duties or responsibilities
under the Plan or any Fiduciary who assumes such a position with the Plan shall
discharge his duties solely in the interest of the Participants and
Beneficiaries and for the exclusive purpose of providing such benefits as
stipulated herein to such Participants and Beneficiaries, or of defraying
reasonable expenses of administering the Plan. Each Fiduciary in carrying out
such duties and responsibilities shall act with the care, skill, prudence, and
diligence under the circumstances then prevailing that a prudent person acting
in a like capacity and familiar with such matters would use in exercising such
authority or duties.

         A Fiduciary may serve in more than one Fiduciary capacity and may
employ one or more persons to render advice with regard to his Fiduciary
responsibilities. If the Fiduciary is serving as such without compensation, all
expenses reasonably incurred by such Fiduciary shall be reimbursed by the
Employer or, at the Corporation's direction, from the assets of the Trust.

         A Fiduciary may allocate any of his responsibilities for the operation
and administration of the Plan. In limitation of this right, a Fiduciary may not
allocate any responsibilities as contained herein relating to the management or
control of the Fund except (1) through the employment of an investment manager
as provided in Section 8.3 and in the Trust Agreement relating to the Fund, or
(2) to the extent Participants specify their own Investment Options. 

7.2      Corporation

         The Corporation established and maintains the Plan for the benefit of
its Employees and those of participating Employers and of necessity retains
control of the operation and administration of the Plan. The Corporation is the
Plan administrator within the meaning of ERISA Section 3(16)(A). The Corporation
in accordance with specific provisions of the Plan has, as herein indicated,
delegated certain of these rights and obligations to the Employer, the Trustee
and the Committee and these parties shall be solely responsible for these, and
only these, delegated rights and obligations.


                                       26



<PAGE>





7.3      Employer

         The Employer shall indemnify each member of the Board of Directors, the
Committee, and any of its employees to whom any fiduciary responsibility with
respect to the Plan is allocated or delegated, from and against any and all
liabilities, costs and expenses incurred by such persons as a result of any act
or omission to act in connection with the performance of their fiduciary duties,
responsibilities and obligations under the Plan and under ERISA, except for
liabilities and claims arising from such fiduciary's willful misconduct or gross
negligence. For such purpose, the Employer may obtain, pay for and keep current
a policy or policies of insurance. Where such policy or policies of insurance
are purchased, there shall be no right to indemnification under this Section
8.3, except to the extent of any deductible amount under the policy or policies
or with regard to covered claims in excess of the insured amount. No Plan assets
may be used for any indemnification.

         The Employer shall supply such full and timely information for all
matters relating to the Plan as (a) the Committee, (b) the Trustee, and (c) the
accountant engaged on behalf of the Plan by the Corporation may require for the
effective discharge of their respective duties. 

7.4      Trustee

         The Trustee, in accordance with the Trust Agreement, shall have
authority to manage the Fund, except that (1) the Committee may in its
discretion employ at any time and from time to time an investment manager (as
defined in section 3(38) of ERISA) to direct the Trustee with respect to all or
a designated portion of the assets comprising the Fund, and (2) Participants may
specify their own Investment Options.

         Each Participant in the Plan shall be a "named fiduciary" within the
meaning of section 402 of the Employee Retirement Income Security Act of 1974,
as amended ("ERISA"), to the extent that Employer Stock or shares of Corning or
CCL, whether or not allocated to his accounts, are voted or tendered according
to the Participant's directions. 

7.5      Committee

         The Board shall appoint a Benefits Administration Committee of not less
than three persons to hold office during the pleasure of the Corporation. No
compensation shall be paid members of the Committee from the Fund for service on
such Committee.


                                       27



<PAGE>


         The Committee shall choose from among its members a chairman and a
secretary. Any action of the Committee shall be determined by the vote of a
majority of its members. Either the chairman or the secretary may execute any
certificate or other written direction on behalf of the Committee.

         The Committee shall hold meetings upon such notice, at such place or
places and at such time or times as the Committee may from time to time
determine. Meetings may be called by the chairman or any two members. A majority
of the members of the Committee at the time in office shall constitute a quorum
for the transaction of business. The Committee may also act by written consent
in lieu of a meeting.

         A Committee member may resign at any time by giving written notice of
his resignation to the Corporation at least thirty days in advance, unless the
Corporation shall accept shorter notice. The Corporation shall appoint
replacement Committee members. Any Committee member who was employed by the
Employer when appointed to the Committee shall automatically be deemed to have
resigned from the Committee effective as of the date he ceases to be employed by
the Employer, unless the Corporation shall affirmatively act to keep said member
on the Committee.

         Nothing herein shall prevent a Committee member from being a
Participant, or from acting on Plan matters which affect himself by virtue of
affecting all Participants generally. However, a Committee member shall not act
on any matter which affects himself specially. If application of the preceding
sentence results in there not being a quorum to act on any matter, the
Corporation shall appoint the necessary number of temporary Committee members to
take the action.

         In accordance with the provisions hereof, the Committee has been
delegated certain administrative functions relating to the Plan with all powers
necessary to enable it properly to carry out such duties.

         The Committee shall have discretionary authority to construe the Plan,
and to determine, consistent with the terms of the Plan, all questions that may
arise thereunder relating to (a) the eligibility of individuals to participate
in the Plan, (b) the amount of benefits to which any Participant or Beneficiary
may become entitled hereunder, and (c) any situation not specifically covered by
the provisions of the Plan. The determination of the Committee shall be final
and binding on all interested parties. All disbursements by the Trustee, except 
for the ordinary expenses of administration of the Fund or the 


                                       28



<PAGE>


reimbursement of reasonable expenses at the direction of the Corporation as
provided herein, shall be made upon, and in accordance with, the written
directions of the Committee. When the Committee is required in the performance
of its duties hereunder to administer or construe, or to reach a determination
under any of the provisions of the Plan, it shall do so on a uniform, equitable
and nondiscriminatory basis.

7.6      Claims for Benefits

         All claims for benefits under the Plan shall be submitted to the
Committee which shall have the responsibility for determining the eligibility of
any Participant or Beneficiary for benefits. All claims for benefits shall be
made in writing and shall set forth the facts which such Participant or
Beneficiary believes to be sufficient to entitle him to the benefit claimed. The
Committee may adopt forms for the submission of claims for benefits in which
case all claims for benefits shall be filed on such forms. The Committee shall
provide Participants and Beneficiaries with all such forms.

         Upon receipt by the Committee of a claim for benefits, it shall
determine all facts which are necessary to establish the right of an applicant
to benefits under the provisions of the Plan and the amount thereof as herein
provided. The applicant shall be notified in writing by the Committee of its
decision with respect to such applicant's claim within 90 days after the receipt
of written request for benefits.

         If any claim for benefits is denied, the notice shall be written in a
manner calculated to be understood by the applicant and shall include:

         (a) The specific reason or reasons for the denial;

         (b) Specific references to the pertinent Plan provisions on which the
denial is based;

         (c) A description of any additional material or information necessary
for the applicant to perfect the claim and an explanation why such material or
information is necessary; and

         (d) An explanation of the Plan's claim review procedures. If special
circumstances require an extension of time for processing the initial claim, a
written notice of the extension and the reason therefor shall be furnished to
the claimant by the Committee before the end of the initial 90-day period. In no
event shall such extension exceed 180 days after the receipt of the initial
claim for benefits.


                                       29



<PAGE>





7.7      Denial of Benefits - Review Procedure

         In the event a claim for benefits is denied or if the applicant has had
no response to such claim within 90 days of its submission (in which case the
claim for benefits shall be deemed to have been denied), the applicant or his
duly authorized representative, at the applicant's sole expense, may appeal the
denial by filing a written request for review with the Committee within 60 days
of the receipt of written notice of denial or 60 days from the date such claim
is deemed to be denied. In pursuing such appeal the applicant or his duly
authorized representative may review pertinent Plan documents, and may submit
issues and comments in writing.

         The decision on review shall be made by the Committee within 60 days of
receipt of the request for review, unless special circumstances require an
extension of time for processing, in which case a decision shall be rendered as
soon as possible, but not later than 120 days after receipt of a request for
review. If such an extension of time is required, written notice of the
extension shall be furnished to the claimant before the end of the original 60
day period. The decision on review shall be in writing, shall be written in a
manner calculated to be understood by the claimant, and shall include specific
references to the provisions of the Plan on which such denial is based. If the
decision on review is not furnished within the time specified above, the claim
shall be deemed denied on review. The decision of the Committee upon review will
be final and binding on all parties. 

7.8      Records

         All acts and determinations of the Committee shall be duly recorded by
the secretary thereof and all such records, together with such other documents
as may be necessary in exercising its duties under the Plan shall be preserved
in the custody of such secretary. Such records and documents shall at all times
be open for inspection and for the purpose of making copies by any person
designated by the Corporation. The Committee shall provide such timely
information, resulting from the application of its responsibilities under the
Plan, as needed by the Trustee and the accountant engaged on behalf of the Plan
by the Corporation, for the effective discharge of their respective duties.


                                       30



<PAGE>



7.9      Missing Persons

         The Committee shall make a reasonable effort to locate all persons
entitled to benefits under the Plan. If such a person cannot be located, the
amount to which such a person otherwise would be entitled shall be retained by
the Trustee and treated in all respects as assets of the Trust, pending
disposition of such amount in accordance with regulations promulgated by the
Secretary of Labor or the Secretary of the Treasury. The Trustee may deposit any
such amounts into an "escheat fund" maintained by such Trustee but not within
the Trust.








                                       31



<PAGE>

                                  ARTICLE VIII
                      AMENDMENT AND TERMINATION OF THE PLAN

8.1      Amendment of the Plan

         The Corporation shall have the right at any time by action of the Board
to amend the Plan in whole or in part, including retroactively to the extent
necessary. The duties, powers and liability of the Trustee hereunder shall not
be increased without its written consent. The amount of benefits which at the
later of the adoption or effective date of such amendment shall have accrued for
any Participant or Beneficiary hereunder shall not be adversely affected
thereby. No such amendment shall have the effect of revesting in the Employer
any part of the principal or income of the Fund. No amendment may eliminate or
reduce any early retirement benefit or subsidy that continues after retirement
or optional form of benefit. Unless expressly provided for in an amendment, it
shall not affect the rights and obligations of any Participant who terminated
employment prior to the effective date of the amendment. 

8.2      Termination of the Plan

         The Corporation expects to continue the Plan indefinitely, but
continuance is not assumed as a contractual obligation and each Employer
reserves the right at any time by action of its board of directors to terminate
the Plan as applicable to itself. If an Employer terminates or partially
terminates the Plan or permanently discontinues its Contributions at any time,
each Participant affected thereby shall be then fully vested in his Individual
Account.

         In the event of termination of the Plan by an Employer, the Committee
shall value the Fund as of the date of termination. That portion of the Fund
applicable to any Employer for which the Plan has not been terminated shall be
unaffected. The Individual Accounts of the Participants and Beneficiaries
affected by the termination, as determined by the Committee, shall continue to
be administered as a part of the Fund or distributed to such Participants or
Beneficiaries pursuant to Section 5.6 as the Committee, in its sole discretion,
shall determine. Any distributions upon plan termination of amounts attributable
to Employee Pre-Tax Contributions shall only be made to the extent permissible
by Code Section 401(k)(10).

                                       32



<PAGE>

                                   ARTICLE IX
                PROVISIONS RELATIVE TO EMPLOYERS INCLUDED IN PLAN

9.1      Method of Participation

         Any organization which is affiliated with the Corporation may with the
consent of the Board adopt the Plan. In order to adopt the Plan, appropriate
action is required by the board of directors (or other governing body) of the
adopting organization and by the Board. Any organization which becomes a party
to the Plan shall thereafter promptly deliver to the Trustee provided for in
Article VII hereof a certified copy of the resolutions or other documents
evidencing its adoption of the Plan or a similar plan and also a written
instrument showing the Board's approval of such organization's becoming a party
to the Plan. 

9.2      Withdrawal

         Any one or more of the Employers included in the Plan may withdraw from
the Plan at any time by giving six months advance notice in writing to the Board
and the Committee (unless a shorter notice shall be agreed to by the Board) of
its or their intention to withdraw. Upon receipt of notice of any such
withdrawal, the Committee shall certify to the Trustee the equitable share of
such withdrawing Employer in the Fund (to be determined by the Committee).

         The Trustee shall thereupon set aside from the Fund then held by it
such securities and other property as it shall, in its sole discretion, deem to
be equal in value to such equitable share. If the Plan is to be terminated with
respect to such Employer, the amount set aside shall be dealt with in accordance
with the provisions of Section 9.2. If the Plan is not to be terminated with
respect to such Employer, the Trustee shall pay such amount to such trustee as
may be designated by such withdrawing Employer, and such securities and other
property shall thereafter be held and invested as a separate trust of the
Employer which has so withdrawn, and shall be used and applied according to the
terms of a new agreement and declaration of trust between the Employer so
withdrawing and the trustee so designated.

         Neither the segregation of the Fund assets upon the withdrawal of an
Employer, nor the execution of any new agreement and declaration of trust
pursuant to any of the provisions of this Section 9.2, shall operate to permit
any part of the corpus or income of the Fund to be used for or diverted to
purposes other than for the exclusive benefit of



                                       33



<PAGE>





Participants and Beneficiaries or to defray reasonable costs of administering
the Plan and Trust.

9.3      Adoption of ESOP by Participating Employer 

         Any Employer joining the Plan which is not 100 percent owned by the
Employer must expressly provide in said joiner agreement whether the leveraging
provisions of the ESOP are being adopted by such participating Employer. If the
leveraged ESOP is not so adopted, said participating Employer shall participate
in the ESOP provisions of this Plan as may be modified in said joiner agreement,
but all specific provisions applicable to Exempt Loans and the suspense account
established pursuant to the loan shall not apply. If the ESOP provisions of the
Plan are adopted by such a non-100 percent owned participating Employer, any
Exempt Loan applicable to said participating Employer and its Participants shall
be solely the obligation of said participating Employer, and not the Employer or
any other participating Employer under the Plan, and separate accounting shall
be maintained on behalf of said participating Employer and its Participants with
only Participants employed by said participating Employer entitled to
allocations from the fund maintained for said participating Employer's Exempt
Loan. The foregoing provisions governing separate Exempt Loans and separate
groups of Employees of non-100 percent owned participating Employers shall
similarly apply to an Exempt Loan of the Employer and its 100 percent owned
Participating Employers which join the Plan, and their respective Participants,
but for this purpose a 100 percent owned participating employer may, if so
provided in its joinder agreement, join in the Employer's Exempt Loan and in
such case all participating Employer contributions by the Employer and said
Participating Employers and all accounting for shares released from the suspense
account shall be combined for Participants employed by the Employer and each
such participating Employer.

                                       34



<PAGE>



                                    ARTICLE X
                              TOP-HEAVY PROVISIONS

10.1     Determination of Top-Heavy

         (a) (1) The Plan will be considered a Top-Heavy Plan for any Plan Year
if as of the Determination Date (A) the value of the Individual Accounts of
Participants who are Key Employees as of such Determination Date exceeds 60% of
the value of the Individual Accounts of all Participants determined as of such
Determination Date, excluding former Key Employees (the "60% Test") or (B) the
Plan is part of a Required Aggregation Group which is Top-Heavy. Notwithstanding
the results of the 60% Test, the Plan shall not be considered a Top-Heavy Plan
for any Plan Year in which the Plan is a part of a Required or Permissive
Aggregation Group which is not Top-Heavy.

              (2) For purposes of the 60% Test,

                  (A) all distributions made from Individual Accounts within the
five- year period ending on the Determination Date shall be taken into account;

                  (B) if any Participant is a non-Key Employee with respect to
the Plan for any Plan Year, but such Participant was a Key Employee with respect
to the Plan for any prior Plan Year, the Individual Account of such Participant
shall not be considered; and

                  (C) If a Participant has not performed any service for the
Employer or any Affiliate which maintains the Plan at any time during the
five-year period ending on the Determination Date, the Individual Account of
such Participant shall not be considered.

         (b) Minimum Allocations: Notwithstanding Sections 4.3 and 4.4, for any
Plan Year during which the Plan is a Top-Heavy Plan, the rate of Employer
Matching Contributions and Discretionary Contributions for such Plan Year
allocated to the Individual Accounts of Participants who are non-Key Employees
and who remain employed by the Employer (or any Affiliate) at the end of the
Plan Year (regardless of any such Participant's hours of service or level of
compensation during the Plan Year) shall be not less than the lesser of:

              (1) three percent (3%) of such non-Key Employee Participant's
Section 415 Compensation; or


                                       35



<PAGE>





               (2) the highest aggregate percentage of Section 415
Compensation at which Employer Matching Contributions, Discretionary
Contributions, and Employee Pre-Tax Contributions are made (or required to be
made) and allocated under Article IV for any Key Employee for the Plan Year.

         If a Participant is covered by more than one defined contribution plan
on account of his employment with the Employer and/or any Affiliate, the minimum
allocation required by this Section shall be determined by aggregating the
allocations under all such plans.

         (c) (1) Notwithstanding Section 5.5, for any Plan Year in which the
Plan is a Top- Heavy Plan, a Participant who has earned at least one hour of
service during such Plan Year shall have a vested interest in those portions of
his Individual Account which are not automatically one hundred percent (100%)
vested, including allocations made to those portions of the Account in Plan
Years prior to the Plan becoming Top-Heavy, determined as follows:


          Years of Vesting Service              Vested Interest
          ------------------------              ---------------

               less than 2                            0%
               2 or more                             100%

              (2) If the Plan ceases to be a Top-Heavy Plan, the vesting rules
set forth in Section 5.5 shall again apply except that:

                  (A) any portion of a Participant's Individual Account that was
vested before the Plan ceased to be a Top-Heavy Plan shall remain vested, and

                  (B) any Participant with three or more years of service shall
have the option to continue to have his vested interest in those portions of his
Individual Account which are not automatically one hundred percent (100%) vested
determined under this Section 10.1(c).

         (d) Impact on Minimum and Maximum Benefits where Employer Maintains
Both Defined Benefit and Defined Contributions Plans

              (1) Impact on Minimum. If the Employer (or any Affiliate)
maintains a defined benefit plan in addition to this defined contribution plan,
both of which are Top-Heavy, then:

                                       36
<PAGE>

                  (A) in the case of non-Key Employee participants covered only
by the defined benefit plan, the minimum benefit under the defined benefit plan
shall be provided; and


                  (B) in the case of non-Key Employee Participants not covered
by the defined benefit plan or covered by both plans, a minimum allocation of
five percent (5%) of such non-Key Employee Participant's Section 415
Compensation shall be provided. If a Participant is covered by more than one
defined contribution plan on account of his employment with the Employer and/or
any Affiliate, the minimum allocation required by this Section shall be
determined by aggregating the allocations under all such defined contributions
plans.

              (2) Impact on Maximum. If the Employer (or any Affiliate)
maintains a defined benefit plan in addition to this defined contribution plan,
both of which are Top-Heavy, Section 4.7 shall be read by substituting the
number "1.00" for the number "1.25" wherever it appears therein, unless (A) the
total aggregate accrued benefits under both such plans for Key Employees does
not exceed 90% of the total aggregate accrued benefits under both such plans for
all Employees (computed in the same manner as the determination in subsection
(a)), and (B)(i) paragraph (1) is read by substituting "seven and one-half
percent (7 1/2%)" for "five percent (5%)," and (ii) in the case of non-Key
Employee participants covered only by the defined benefit plan, a minimum
benefit of three percent (3%) for each year of service (not to exceed 10) shall
be provided.

10.2     Top-Heavy Definitions

         Determination Date - With respect to any Plan Year, the last day of 
the preceding Plan Year.

         Key Employee - Any Employee or former Employee who at any time during
the Plan Year containing the Determination Date, or the four preceding Plan
Years, is or was (1) an officer of the Employer having annual Section 415
Compensation for such Plan Year which is in excess of 50 percent of the dollar
limit in effect under Code Section 415(b)(1)(A) for the calendar year in which
such Plan Year ends (but in no event shall the number of officers taken into
account as Key Employees exceed the lesser of (i) 50 or (ii) the greater of 3 or
10% of all employees); (2) an owner of (or considered as owning within the
meaning of Code Section 318) both more than a 1/2 percent interest as well as
one of the ten largest interests in the Employer and having annual Section 415


                                       37
<PAGE>


Compensation greater than the dollar limit in effect under Code Section
415(c)(1)(A) for such Plan Year; (3) a five percent owner of the Employer; or
(4) a one percent owner of the Employer who has annual Section 415 Compensation
of more than $150,000. For purposes of determining five percent and one percent
owners, neither the aggregation rules nor the rules of subsections (b), (c) and
(m) of Code Section 414 apply. Beneficiaries of an Employee acquire the
character of the Employee who performed services for the Employer. Also,
inherited benefits will retain the character of the benefits of the Employee who
performed services for the Employer. A non-Key Employee is any Employee who is
not a Key Employee, or who is a former Key Employee.

         Permissive Aggregation Group - Each employee pension benefit plan
maintained by the Employer (or any Affiliate) which is considered part of the
Required Aggregation Group, plus one or more other employee pension benefit
plans maintained by the Employer (or any Affiliate) that are not part of the
Required Aggregation Group but that satisfy the requirements of Section
401(a)(4) and Section 410 of the Code when considered together with the Required
Aggregation Group.

         Required Aggregation Group - Each employee pension benefit plan
maintained by the Employer (or any Affiliate), whether or not terminated, in
which a Key Employee participates in the Plan Year containing the Determination
Date or any of the four preceding Plan Years, and each other employee pension
benefit plan maintained by the Employer (or any Affiliate), whether or not
terminated, in which no Key Employee participates but which during the same
period enables any employee pension benefit plan in which a Key Employee
participates to meet the requirements of Section 401(a)(4) or Section 410 of the
Code.

                                       38



<PAGE>

                                   ARTICLE XI
                                  MISCELLANEOUS


11.1     Governing Law

         The Plan shall be construed, regulated and administered according to
the laws of Massachusetts except in those areas preempted by the laws of the
United States of America.

11.2     Construction

         The headings and subheadings in the Plan have been inserted for
convenience of reference only and shall not affect the construction of the
provisions hereof. In any necessary construction the masculine shall include the
feminine and the singular the plural, and vice versa.

11.3     Administration Expenses

         The expenses of administering the Fund and the Plan may be paid either
by the Employer or from the Fund, as directed by the Corporation.

11.4     Participant's Rights; Acquittance

         No Participant in the Plan shall acquire any right to be retained in
the Employer's employ by virtue of the Plan, nor, upon his dismissal, or upon
his voluntary termination of employment, shall he have any right or interest in
and to the Fund other than as specifically provided herein. The Employer shall
not be liable for the payment of any benefit provided for herein. All benefits
hereunder shall be payable only from the Fund. 

11.5     Spendthrift Clause

         Except as provided by a qualified domestic relations order within the
meaning of ERISA Section 206(d)(3), none of the benefits, payments, proceeds, or
distributions under this Plan shall be subject to the claim of any creditor of a
Participant or a Beneficiary hereunder or to any legal process by any creditor
of a Participant or Beneficiary. Neither a Participant or Beneficiary shall have
any right to alienate, commute, anticipate, or assign any of the benefits,
payments, proceeds or distributions under this Plan. 

11.6     Merger, Consolidation or Transfer

         In the event of the merger or consolidation of the Plan with another
plan or transfer of assets or liabilities from the Plan to another plan, each
then Participant or Beneficiary shall not, as a result of such event, be
entitled on the day following such 

                                       39

<PAGE>


merger, consolidation or transfer under the termination of the Plan provisions
to a lesser benefit than the benefit he was entitled to on the day prior to the
merger, consolidation or transfer if the Plan had then terminated.

11.7     Mistake of Fact

         Notwithstanding anything herein to the contrary, upon the Employer's
request, a Contribution which was made by a mistake of fact, or conditioned upon
initial qualification of the Plan or upon the deductibility of the Contribution
under Code Section 404, may be returned to the Employer by the Trustee within
one (1) year after the payment of the Contribution, the denial of the
qualification or the disallowance of the deduction (to the extent disallowed),
whichever is later. For purposes of the preceding sentence, all contributions to
the Plan made before receipt of a favorable determination letter on
qualification from the Internal Revenue Service shall be conditioned on the
Plan's initial qualification, and all contributions, whenever made, shall be
conditioned on their deductibility under Code Section 404. 

11.8     Counterparts

         The Plan and the Trust Agreement may be executed in any number of
counterparts, each of which shall constitute but one and the same instrument and
may be sufficiently evidenced by any one counterpart.
     


                                       40



<PAGE>

                                   ARTICLE XII
                              ADOPTION OF THE PLAN

         Anything herein to the contrary notwithstanding, this Plan is adopted
and maintained under the condition that it is qualified by the Internal Revenue
Service under Code Section 401(a) and that the Trust hereunder is exempt under
Code Section 501(a).

         As evidence of its adoption of the Plan, Covance Inc. has caused this
instrument to be signed by its authorized officer this ___ day of __________,
199__, effective as the _______ day of _____________, 199____.except as
otherwise provided herein.





Covance Inc. hereby signifies its adoption of this Plan.


ATTEST:                       COVANCE INC. (f/k/a Corning Pharmaceutical
                              Services Inc.


____________________________  By:___________________________________(SEAL)
                              (Title)


                              Date:__________________________________


Covance Preclinical Corporation Inc. hereby signifies its adoption of this Plan.


ATTEST:                       COVANCE PRECLINICAL CORPORATION
                              (f/k/a Hazleton Corporation)



___________________________   By:__________________________________(SEAL)
                              (Title)




                                       41



<PAGE>


         Covance Clinical and Periapproval Services Inc. hereby signifies its
adoption of this Plan.


ATTEST:                      COVANCE CLINICAL AND PERIAPPROVAL SERVICES INC.
                             (f/k/a Corning Besselaar, Inc.)



____________________________  By:___________________________________(SEAL)
                              (Title)


                              ____________________________________________
                              (Date)


         Covance Clinical Research Unit Inc., a wholly-owned subsidiary of
Covance Clinical and Periapproval Services Inc., hereby signifies its adoption
of this Plan.


ATTEST:                   COVANCE CLINICAL RESEARCH UNIT INC.
                          (f/k/a Corning Besselaar Clinical Research Unit, Inc.)



_________________________  By:___________________________________(SEAL)
Secretary                 (Title)


                           ____________________________________________
                           (Date)



         Covance Periapproval Services Inc., a wholly-owned subsidiary of
Covance Clinical and Periapproval Services Inc., hereby signifies its adoption
of this Plan.


ATTEST:                      COVANCE PERIAPPROVAL SERVICES INC.
                             (f/k/a Corning Pact, Inc.)



____________________________  By:___________________________________(SEAL)
                              (Title)


                              ____________________________________________
                              (Date)


         Covance Laboratories Inc., a wholly-owned subsidiary of Covance
Preclinical Corporation, hereby signifies its adoption of this Plan.

                                       42



<PAGE>


ATTEST:                      COVANCE LABORATORIES INC.
                             (f/k/a Corning Hazleton Inc.)



____________________________  By:___________________________________(SEAL)
                              (Title)


                              ____________________________________________
                              (Date)




         Covance Research Products Inc., a wholly-owned subsidiary of Covance
Preclinical Corporation, hereby signifies its adoption of this Plan.


ATTEST:                       COVANCE RESEARCH PRODUCTS INC.
                              (f/k/a HRP, Inc.)



____________________________  By:___________________________________(SEAL)
                              (Title)


                              ____________________________________________
                              (Date)




         Covance Pharmaceutical Packaging Services Inc. hereby signifies its 
adoption of this Plan.


ATTEST:                      COVANCE PHARMACEUTICAL PACKAGING SERVICES INC.
                             (f/k/a Corning National Packaging, Inc.)




____________________________  By:___________________________________(SEAL)
                              (Title)


                              ____________________________________________
                              (Date)



         Covance Central Laboratory Services Inc.  hereby signifies its 
adoption of this Plan.


ATTEST:                       COVANCE CENTRAL LABORATORY SERVICES INC.
                              (f/k/a Corning Scicor, Inc.)

                                       43
<PAGE>




____________________________  By:___________________________________(SEAL)
                              (Title)


                              ____________________________________________
                              (Date)


         Covance Health Economics and Outcome Services Inc. hereby signifies its
adoption of this Plan.


ATTEST:                    COVANCE HEALTH ECONOMICS AND OUTCOME SERVICES INC.
                           (f/k/a Corning HTA Inc.)



____________________________  By:___________________________________(SEAL)
                              (Title)


                              ____________________________________________
                              (Date)



         Covance Biotechnology Services Inc., hereby signifies its adoption of
this Plan.


ATTEST:                       COVANCE BIOTECHNOLOGY SERVICES INC.




____________________________  By:___________________________________(SEAL)
                              (Title)


                              ____________________________________________
                              (Date)



         Covance Central Laboratory Limited Partnership (d/b/a Covance Central
Laboratory Services Inc. f/k/a Corning SciCor Limited Partnership), hereby
signifies its adoption of this Plan.


ATTEST:                       COVANCE CENTRAL LABORATORY LIMITED PARTNERSHIP
                              (d/b/a Covance Central Laboratory Services Inc.
                              f/k/a Corning SciCor Limited Partnership)

                                       44

<PAGE>



____________________________  By:___________________________________(SEAL)
Secretary                     (Title)


                              ____________________________________________
                              (Date)












                                       45
<PAGE>


                                  Supplement A
                                       TO

                                COVANCE INC. INC.
                      EMPLOYEE STOCK OWNERSHIP PLAN (ESOP)


A-1 Purpose. The purpose of this Supplement A to the Plan is to set forth the
terms of the Plan as applied to the portion of the ESOP attributable to Exempt
Loans as described in subsection A-4.

A-2 Effective Date. The effective date of this Supplement A is the Effective
Date.].

A-3 Participation. Each Participant in the Plan on the Effective Date of this
Supplement A shall immediately become a Participant in this Supplement A. Every
other person who thereafter becomes a Participant in the Plan shall at the same
time become a Participant in this Supplement A.

A-4 Exempt Loan. Any loan to the Plan or Trust not prohibited by section 4975(c)
of the Code, including a loan which meets the requirements set forth in section
4975(d)(3) of the Code and the regulations promulgated thereunder, the proceeds
of which are used to finance the acquisition of ESOP Stock or to refinance such
a loan. An Exempt Loan shall be for a specific term, shall bear a reasonable
rate of interest and shall not be payable on demand except in the event of
default. An Exempt Loan may be secured by a pledge of the financed shares so
acquired (or acquired with the proceeds of a prior Exempt Loan which is being
refinanced). No other Trust Fund assets may be pledged as collateral for an
Exempt Loan, and no lender shall have recourse against Trust Fund assets other
than any financed shares remaining subject to pledge. If the lender is a party
in interest (under ERISA), the Exempt Loan must provide for a transfer of Trust
Fund assets on default only upon and to the extent of the failure of the Trust
to meet the payment schedule of the Exempt Loan. Any pledge of financed shares
must provide for the release of the shares so pledged as payments on the Exempt
Loan are made by the Trustee and such financed shares are allocated to
Participants' accounts. Payments of



                                       A1



<PAGE>





principal on any Exempt Loan shall be made by the Trustee (as directed by the
Committee) only from Employer contributions paid in cash under the Plan to
enable the Trust to repay such Exempt Loan, from earnings attributable to such
Employer contributions and from any cash dividends received by the Trust on such
financed shares or dividends on such other shares of Employer Stock as is
permitted under Code section 404(k).

A-5 Investment of Exempt Loan Proceeds. The Employer may direct the Trustee to
enter into one or more Exempt Loans to finance the acquisition of ESOP Stock.
Proceeds from an Exempt Loan may be used to acquire ESOP Stock from the
Employer's shareholders or directly from the Employer. If such shares are
purchased from the Employer, no commission may be charged with respect thereto
and the sale price shall not be more than the fair market value thereof, defined
for this purpose with respect to the Employer's common stock to be said common
stock's New York Stock Exchange closing price on the first business day
immediately preceding the date of sale. There shall be no limit on the amount of
stock of the Employer which may be held at any one time by the Trustee in the
Trust Fund regardless of the percentage which such stock so held bears to the
assets of the Trust Fund or to the outstanding shares of stock of the Employer
or for any other reason.

Notwithstanding any other provision of the Plan, all proceeds of an Exempt Loan
shall be used, within a reasonable time after receipt by the Trust Fund, for the
following purposes:

         (a)      To acquire ESOP Stock;

         (b)      To repay the same Exempt Loan; or

         (c)      To repay any previous Exempt Loan.

ESOP Stock acquired by the Trust Fund through an Exempt Loan shall be initially
maintained in a Suspense Account and shall thereafter be released from suspense
and allocated to Participants' ESOP Accounts as hereinafter provided.



                                       A2
<PAGE>

A-6 Supplement A Cash Equivalents Fund. All cash dividends on Employer Stock
held in a Suspense Account which are not allocated to Participants' accounts or,
in the case of allocated shares, which the Employer directs are to be used to
make payments on Exempt Loans shall be credited to the Supplement A Cash
Equivalents Fund pending their application to Exempt Loan payments. Except as
provided under Section 7.5, all such dividends and all earnings of the
Supplement A Cash Equivalents Fund shall be used to make principal payments on
outstanding Exempt Loans to the extent then due. In the event that the amount of
such dividends and earnings exceeds the amount of principal payable on that
date, the excess shall be applied until exhausted to interest payable on that
date, and principal and interest payments due thereafter. Notwithstanding the
preceding sentences of Section A-6, in lieu of making payments on outstanding
Exempt Loans, the Committee may direct that all or any amount of cash dividends
received with respect to Employer Stock allocated to participants' accounts
shall be credited proportionately to such Participants' Accounts pending
investment in the Employer Stock Fund. Any amount that is applied to make a
payment on an outstanding Exempt Loan after the last day of a plan year (the
"prior plan year"), but on or before the due date (including extensions thereof)
for the filing of the federal income tax return of the Employer for the tax year
in which the last day of such prior plan year occurs, may be designated by the
employers as a payment with respect to such prior plan year.

A-7 Coordination with Employer Contributions. For each Plan Year the Employer
shall make contributions under this Section A-7 which, after taking into account
the use of dividends and earnings in accordance with Section A-6, are sufficient
to meet all scheduled payments of principal and interest on outstanding Exempt
Loans. Employer contributions under Section 3.3 (discretionary) shall be applied
against payments on any Exempt Loan to the extent the Committee in its sole
discretion shall determine and ESOP Stock shall then be released. An Employer's
obligations to contribute under Section 3.3 shall be reduced for such month by
the fair market value as of the date of release of the ESOP Stock so released or
otherwise allocated as below provided. To the extent said fair market value is
less than said Employer's obligations under Section 3.3 for any such



                                       A3



<PAGE>



month, the Employer shall make further contributions to the Trust Fund to
fully meet said obligations. For each Plan Year, if for a calendar month the
fair market value as of the date of release of the shares so released is in
excess of the Employer's obligations to contribute under Section 3.3 for such
month, the shares released for said month representing the excess ("excess
shares") shall continue to be held by the Trustee and shall thereafter be
allocated to the Participants' Individual Accounts in the following manner:
first, if in a succeeding calendar month within said Plan Year, the fair market
value of the shares so released for said month are less than the Employer's
obligations to contribute under Section 3.3 for said month, then "excess shares"
remaining unallocated for any prior calendar month in said Plan Year shall be
allocated to the Participants' Individual Accounts to the extent that said
Employer obligations exceed the value of the released shares, and for this
purpose said "excess shares" to be so allocated shall be valued at the same
value as the value of the shares released for said month; and second, if as of
the last day of the Plan Year there remain "excess shares" which have not been
allocated to Participants' Individual Accounts as aforesaid, said "excess
shares" shall be allocated as of the last day of the Plan Year to the
Participants' Individual Accounts, as the Committee may determine in its sole
discretion on a year-to-year basis, in direct proportion to the value
(determined as of the date allocated to the Participants' Individual Accounts)
of those shares released and allocated to the Fund so determined by the
Committee, together with all other Employer contributions to Participants'
Individual Accounts for said Plan Year. In addition to the foregoing
contributions, in any Plan Year, the Employers may make supplemental
contributions to be used by the Trustee to prepay any Exempt loan, to pay
expenses of the Plan and any related trust and to satisfy the dividend
requirements for that year with respect to Employer Stock allocated to
Participants' Individual Accounts. All Employer Discretionary Contributions
shall be used to make payments on Exempt Loans to the extent required to meet
any scheduled payments of principal and interest after taking into account the
use of dividends and earnings in accordance with Section A-6.

A-8 Release of Employer Stock From Suspense Account. As of the last day of each
Plan Year, of each calendar quarter in the case of the Employer Stock allocable
for the year as dividend replacements under paragraph A-9(a), or of such other
period provided 

                                       A4

<PAGE>

under the terms of an Exempt Loan, throughout the duration of an Exempt Loan, a
portion of the Employer Stock acquired with the proceeds of such Exempt Loan
shall be withdrawn from the Suspense Account and allocated to eligible
Participants' Individual Accounts in accordance with the provisions of Section
A-9.

         (a)      Subject to the provisions of paragraph (b) below, the number
                  of shares of Employer Stock which shall be released from the
                  Suspense Account for any plan year (calculated separately with
                  respect to each Exempt Loan) shall be equal to the product of:

                  (i)      the number of shares of Employer Stock acquired with
                           the proceeds of the Exempt Loan

                                     Multiplied by

                  (ii)     a fraction, the numerator of which is the amount of
                           principal and interest paid on that loan for that
                           Plan Year and the denominator of which is the amount
                           of principal and interest paid or payable on that
                           loan for that Plan Year and for all future years.

                  For purposes of determining the fraction in (ii), if the
                  interest rate under the Exempt Loan is variable, the interest
                  rate to be paid in future months shall be assumed to be equal
                  to the interest rate applicable as of the applicable month.

         (b)      Notwithstanding the provisions of paragraph (a) above, if
                  provided by the terms of an Exempt Loan or directed by the
                  Committee prior to the first payment of interest on any Exempt
                  Loan, the number of shares of Employer Stock attributable to
                  such Exempt Loan which are withdrawn from the Suspense Account
                  for any Plan Year shall be proportionate to principal payments
                  only, provided that:



                                       A5



<PAGE>



                  (i)      such withdrawal is consistent with the provisions of
                           the Exempt Loan with respect to the release of
                           Employer Stock as collateral, if any, for such loan;

                  (ii)     the Exempt Loan provides for annual payments of
                           principal and interest at a cumulative rate that is
                           not less rapid at any time than level annual payments
                           of such amounts for ten years;

                  (iii)    interest is disregarded for purposes of determining
                           such release only to the extent that it would be
                           determined to be interest under standard loan
                           amortization tables; and

                  (iv)     the term of the ESOP Loan, together with any renewal,
                           extension or refinancing thereof, does not exceed ten
                           years.

         (c)      Notwithstanding the foregoing, in the event such Exempt Loan
                  shall be repaid with the proceeds of a subsequent Exempt Loan
                  (the "Substitute Loan"), such repayment shall not operate to
                  release all such ESOP Stock in the suspense account, but,
                  rather, such release shall be effected pursuant to the
                  foregoing provisions of this Section on the basis of payments
                  of principal and interest on such Substitute Loan.


         (d)      If at any time there is more than one Exempt Loan outstanding,
                  then separate Suspense Accounts may be established for each
                  such Loan. Each Exempt Loan for which a separate Suspense
                  Account is maintained may be treated separately for purposes
                  of the provisions governing the release of ESOP Stock from
                  suspense under this Section and for purposes o the provisions
                  governing the application of Employer contributions to repay
                  an Exempt Loan.



                                       A6



<PAGE>






A-9      Allocation and Crediting of Employer Stock to Individual Accounts and
Application to Plan Limitations. Employer Stock released from the Suspense
Account during any Plan Year shall be allocated and credited as follows:

         (a)      To the extent that dividends on Employer Stock previously
                  allocated to the Individual Account of a Participant have been
                  used to make payments on an Exempt Loan, such account shall be
                  credited with Employer Stock with a fair market value
                  determined as of the last day of the month preceding the month
                  of the dividend payment date equal to the amount of such
                  dividend.

         (b)      As of each calendar month, any Employer Stock released from
                  the Suspense Account during the Plan Year ending on that date
                  and not credited in accordance with paragraph (a) shall be
                  credited to the Individual Accounts of eligible Participants
                  pursuant to Section 4.23, in order to satisfy the obligation
                  under Section 3.13.

         (ce)     It is intended that the provisions of this Supplement A shall
                  be applied and construed in a manner consistent with the
                  requirements and provisions of Treasury Regulations
                  ss.54.4975-7(b)(8), and any successor regulation thereto. The
                  number of shares allocable to a Participant's Individual
                  Account shall be the number of shares which bears the same
                  ratio to the total shares released for such month and
                  allocable to the contribution made by or on behalf of such
                  Participant by his participating Employer under Section 3.1
                  for such month bears to the total Employer contributions under
                  Section 3.1 made on behalf of all such Participants for such
                  month, provided, however, that the fair market value of the
                  shares so allocated as of the date of such allocation shall
                  not exceed the Employer's obligation to contribute under such
                  Section on behalf of such Participant for such month, and any
                  shares in excess of said participating Employer obligations
                  ("excess shares") for all Participants are to be then
                  allocated as described above in Section A-7.



                                       A7



<PAGE>



         (d)      Notwithstanding the foregoing provisions of this Section, if
                  more than one-third of the total allocations to Participants'
                  accounts with respect to a Plan Year would be allocated in the
                  aggregate to the accounts of Highly Compensated Employees and
                  attributable to the Employer Matching Contribution allocated
                  to Employer Stock, then the allocations to the accounts of
                  Highly Compensated Employees shall be reduced, pro rata, in an
                  amount sufficient to reduced the amounts allocated to the
                  accounts of such Participants to an amount not in excess of
                  one- third of the total allocations to Participants' accounts
                  with respect to such Plan Year and any shares of Employer
                  Stock which are prevented from being allocated due to said
                  restriction shall be allocated as though Highly Compensated
                  Employees did not participate in the Plan.

A-10     Diversification Election By Participants. A Qualified Participant is
eligible to elect a diversification of Employer Stock under the conditions
specified in Section 2.6.

A-11     Put Option. Employer Stock acquired with the proceeds of an Exempt Loan
must be subject to a put option, if at the time of its distribution it is either
subject to a trading limitation, or is not publicly traded. For purposes of this
paragraph (b), a "trading limitation" on a security is a restriction under any
Federal or state securities law, any regulation thereunder, or an agreement, not
prohibited by Treasury regulations Section 54.4975-7(b) affecting the security
so as to make the security not as freely tradable as one not subject to such a
restriction. The put option must be exercisable only by a Participant, a
Beneficiary or by any donee of the Participant or by a person to whom the
security passes by reason of a Participant's death. The put option must permit a
Participant to put the security to the Corporation, and it may grant the trust
an option to assume the rights and obligations of the Corporation at the time 
that the put option is exercised, but under no circumstances may the put option 
bind the Trust. If it is known at the time an Exempt Loan is made that Federal 
or state law will be violated by the Corporation's honoring such a put option, 
the put option must permit the security to be 



                                       A8



<PAGE>



put, in a manner consistent with such law, to a third party (for example but
without limitation, to an Affiliate or a shareholder other than the Trust) that
has substantial net worth at the time the Exempt Loan is made and whose net
worth is reasonably expected to remain substantial. A put option must be
exercisable at any time during a period or periods which include at least (A)
sixty (60) days beginning on the date the security subject to the put option is
distributed by the Trustee and (B) sixty (60) days in the next following Plan
Year, in accordance with regulations issued pursuant to Section 409 of the Code.
In the case of a security that is publicly traded without restriction when
distributed, but ceases to be so traded within the put option period(s) set
forth above, the Corporation must notify each security holder in writing on or
before the tenth (10th) day after the date the security ceases to be so traded
that during the remainder of such period(s) the security is subject to put
option. The number of days between such tenth (10th) day and the date on which
notice is actually given, if later than the tenth (10th) days, must be added to
the duration of the put option. The notice must inform distributees of the terms
of the put options that they are to hold. The price at which a put option must
be exercisable is the value of the security, as determined under Treasury
Regulations Section 54.4975-11(d)(5). The provisions for payment under a put
option must provide that the Corporation, or the Trust, if the Plan so elects,
shall repurchase the Employer Securities as follows:

         (A)    If the distribution constitutes a total distribution within the
                meaning of Section 409(h)(5) of the Code, payment of the fair
                market value of the repurchased Employer Securities shall be
                made in five (5) substantially equal annual payments, of which
                the first shall be paid not later than thirty (30) days after
                the Participant exercises the put option. The purchaser will pay
                a reasonable rate of interest and provide adequate security on
                amounts not paid after thirty (30) days;



         (B)    If the distribution does not constitute a total distribution,
                the purchaser shall pay the Participant an amount equal to the
                fair market value of the Employer 

                                       A9



<PAGE>



                Stock repurchased no later than thirty (30) days after the 
                Participant exercises the put option.











                                      A10
<PAGE>



                                  SUPPLEMENT B
                                       TO
              THE COVANCE INC. EMPLOYEE STOCK OWNERSHIP PLAN (ESOP)

                  SUPPLEMENTAL LIST OF PARTICIPATING EMPLOYEES


<TABLE>
<S>                                               <C>

Participating Employer                            Formerly Known As

Covance Inc. (Parent)                             Corning Pharmaceutical Services Inc.

Covance Clinical and Periapproval Services Inc.   Corning Besselaar Inc.

     Covance Clinical Research Unit Inc.          Corning Besselaar Clinical Research Unit
                                                  Inc.

     Covance Periapproval Services Inc.           Corning Pact Inc.

Covance Preclinical Corporation                   Hazleton Corporation

         Covance Laboratories Inc.                Corning Hazleton Inc.

         Covance Research Products Inc.           HRP Inc.

Covance Central Laboratory Services Inc.          Corning SciCor Inc.

         Covance Central Laboratory Limited       Corning SciCor Limited Partnership

         Partnership (dba Covance Central Laboratory
         Services Inc.)

Covance Pharmaceutical Packaging Services Inc.    Corning National Packaging Inc.

Covance Health Economics and Outcome Services     Corning HTA Inc.
Inc.

Covance Biotechnology Services Inc.               Corning Bio Inc.
</TABLE>




                                       B1



<PAGE>






                                  SUPPLEMENT C
                                       TO
                 THE COVANCE INC. EMPLOYEE STOCK OWNERSHIP PLAN

               1996 DOMESTIC AND INTERNATIONAL ALLOCATION FORMULA

This document describes the allocation of certain share of common stock
("Shares") of Covance Inc. ("CPS") between the various employee stock ownership
programs being implemented as a result of the spin-off of CPS from Corning Life
Sciences Inc. (renamed as Corning Clinical Laboratories Inc. ). The 1996 Total
Allocation shall be determined and allocated as follows:

1.   The 1996 Total Allocation: The 1996 total allocation shall be determined as
     follows: The total allocation of shares to the Covance Inc. Employee Stock
     Ownership Plan ("ESOP") and the International Stock Ownership Plan shall
     equal 1.5% of the Shares outstanding on 31 December 1996, with the
     allocation between the two plans being made as follows.

2.   Aggregate International Base Compensation and Aggregate US Base
     Compensation. Aggregate International Base Compensation shall equal the sum
     of the Annualized Base Compensation (converted to US dollars) for each
     individual who is an International Eligible Employee on December 31, 1996.
     The Aggregate US Base Compensation shall equal the sum of the Annualized
     Base Compensation for each individual who is a US Eligible Employee on
     December 31, 1996. Total Aggregate Base Compensation shall be the sum of
     the Aggregate International Base Compensation and the Aggregate US Base
     Compensation.

3.   Allocation Between Plans. The portion of the 1996 Total Allocation shall be
     divided into the International Portion and the US Portion as follows: (I)
     first, shares having a value equal to 1% of Aggregate International
     Compensation shall be allocated to the International Portion and, (II)
     next, the remainder of the 1996 Total Allocation shall be allocated to the
     International Portion and the US Portion in the proportions represented by
     Aggregate International Compensation and Aggregate US Compensation
     respectively.

4.   Award to International Eligible Employees Under the International Stock
     Ownership Plan. The International Portion shall be allocated to
     International Eligible Employees under that Plan in accordance with Rule
     2.2 (a) thereof.

5.   Award US Eligible Employees. The Awards to US Employees shall be determined
     as follows:

         (a) For each US Eligible Employee, determine the amount of Award, based
         on the US Portion (as determined above) that would be provided under
         the ESOP without regard to the limitations imposed by Sections 415 and
         401(a)(17) of the Code.



                                       C1



<PAGE>






         (b) For each US Eligible Employees, determine the amount of award,
         based on the US Portion (as determined above) that would be provided
         under the ESOP, after application of the limitations imposed by Section
         415 and 401(a)(17) of the Code. This amount shall be awarded under the
         ESOP to such individuals.

         (c) The differences, if any, between (a) and (b) above shall be awarded
         to each US Eligible Employee under the International Stock Ownership
         Plan.








                                       C2



                                                FINAL DRAFT - NOVEMBER 15, 1996








                 THE STOCK PURCHASE SAVINGS PLAN OF COVANCE INC.


                       (RESTATED AS OF DECEMBER 31, 1996)




<PAGE>





                                TABLE OF CONTENTS

INTRODUCTION..................................................................1

ARTICLE I           DEFINITIONS...............................................4

ARTICLE II          ELIGIBILITY AND PARTICIPATION............................16

2.1                 Eligibility..............................................16

2.2                 Participation............................................16

2.3                 Beneficiary Designation..................................17

2.4                 Investment Option Specification..........................18

2.5                 Notification of Individual Account Balance...............18

2.6                 Diversification of Investments or Distribution for 
                    Certain Participants.....................................19

ARTICLE III         CONTRIBUTIONS............................................21

3.1                 Employee Pre-Tax Contributions...........................21

3.2                 Employer Matching Contributions..........................23

3.3                 Discretionary Contributions..............................24

3.4                 Rollover Contributions...................................24

3.5                 Maximum Deductible Contribution..........................24

3.6                 Actual Deferral Percentage Test..........................24

3.7                 Payment of Contributions to Trustee......................26

3.8                 Actual Contribution Percentage Test......................26

3.9                 Multiple Use Restrictions................................27

ARTICLE IV          ALLOCATIONS TO INDIVIDUAL ACCOUNTS.......................28

4.1                 Individual Accounts......................................28

4.2                 Allocation of Employee Pre-Tax Contributions.............28

4.3                 Allocation of Employer Matching Contributions............28

4.4                 Allocation of Discretionary Contributions................28

4.5                 Allocation of Forfeitures................................29

4.6                 Maximum Additions........................................29

4.7                 Multiple Plan Participation..............................30

                                       -i-


<PAGE>





ARTICLE V           DISTRIBUTIONS............................................32

5.1                 Normal Retirement........................................32

5.2                 Disability Retirement....................................32

5.3                 Death Before Retirement or Termination of Employment.....32

5.4                 Death After Retirement or Termination of Employment......33

5.5                 Termination of Employment................................34

5.6                 Method of Payment........................................36

5.7                 Benefits to Minors and Incompetents......................39

5.8                 Payment of Benefits......................................40

5.9                 Valuation of Accounts....................................41

5.10                Direct Rollovers.........................................43

5.11                Payment to Alternate Payee Under QDRO....................44

ARTICLE VI          LOANS AND WITHDRAWALS....................................45

6.1                 Loans to Participants....................................45

6.2                 Hardship Withdrawals.....................................48

6.3                 Other Withdrawals........................................50

ARTICLE VII         TRUST FUND/ESOP..........................................51

7.1                 Contributions............................................51

7.2                 Trustee..................................................51

7.3                 Employer Stock Fund......................................51

7.4                 Corning Stock Fund and CCL Stock Fund....................53

7.5                 Dividends on ESOP Stock Attributable to Exempt Loan......53

7.6                 Voting and Tender Offer Rights on Employer Stock.........54

ARTICLE VIII        FIDUCIARIES..............................................55

8.1                 General..................................................55

8.2                 Corporation..............................................55

8.3                 Employer.................................................56

8.4                 Trustee..................................................56

8.5                 Committee................................................56

8.6                 Claims for Benefits......................................58

8.7                 Denial of Benefits - Review Procedure....................59

                                      -ii

<PAGE>

8.8                 Records..................................................59

8.9                 Missing Persons..........................................60

ARTICLE IX          AMENDMENT AND TERMINATION OF THE PLAN....................61

9.1                 Amendment of the Plan....................................61

9.2                 Termination of the Plan..................................61

ARTICLE X           PROVISIONS RELATIVE TO EMPLOYERS INCLUDED IN PLAN........62

10.1                Method of Participation..................................62

10.2                Withdrawal...............................................62

10.3                Adoption of ESOP by Participating Employer...............63

ARTICLE XI          TOP-HEAVY PROVISIONS.....................................64

11.1                Determination of Top-Heavy...............................64

11.2                Top-Heavy Definitions....................................66

ARTICLE XII         MISCELLANEOUS............................................68

12.1                Governing Law............................................68

12.2                Construction.............................................68

12.3                Administration Expenses..................................68

12.4                Participant's Rights; Acquittance........................68

12.5                Spendthrift Clause.......................................68

12.6                Merger, Consolidation or Transfer........................68

12.7                Mistake of Fact..........................................69

12.8                Counterparts.............................................69

12.9                Transitional Rule........................................69

ARTICLE XIII        ADOPTION OF THE PLAN.....................................70


SUPPLEMENT A - to The Stock Purchase Savings Plan Of Covance Inc.  - 
Employee Stock Ownership Plan (ESOP)

SUPPLEMENT B  - Supplemental List of Participating Employers                   
                                                                              

                                      -iii-


<PAGE>





                                  INTRODUCTION

         Effective July 1, 1972, Hazleton Laboratories Corporation adopted the
Hazleton Laboratories Corporation Profit Sharing Plan, a profit sharing plan.

         Effective January 1, 1986, Hazleton Laboratories Corporation amended
the Hazleton Laboratories Corporation Profit Sharing Plan in order to add a
qualified cash or deferred arrangement. At the same time, the name of the plan
was changed to the Hazleton Pre-Tax Savings Plan.

         Effective July 1, 1989, Hazleton Corporation (the "Corporation"),
formerly Hazleton Laboratories Corporation, amended and restated the Hazleton
Pre-Tax Savings Plan in its entirety to comply with the Tax Reform Act of 1986
and subsequent legislation.

         Effective July 1, 1995, the Hazleton Pre-Tax Savings Plan was again
amended and restated in its entirety to reflect certain substantive changes and
renamed the Covance Inc. Retirement Savings Plan.

         Effective as of December 31, 1996, the plan is again amended and
restated in its entirety to reflect the adoption of an employee stock ownership
plan and is hereby renamed the Stock Purchase Savings Plan of Covance Inc.

         Except as expressly provided herein, the Plan provisions as in effect
immediately prior to this amendment and restatement shall remain in effect for
those participants who do not complete an hour of service at any time after
December 31, 1996.

         No provision of this amended and restated Plan shall be constructed to
eliminate or reduce any early retirement benefit or subsidy that continues after
retirement, or optional form of benefit which existed under the Plan prior to
this amendment and restatement, except to the extent permitted under Treasury
Regulations ss.1.401(a)-4 and ss.1.411(d)-4.

         This Plan consists of a profit sharing and stock bonus plan which is
intended to qualify under sections 401(a) and 401(k) of the Internal Revenue
Code, and an employee stock ownership plan which is intended to qualify as a
stock bonus plan under Section 401(a) of the Internal Revenue Code and as an
employee stock ownership plan under Section 4975(e)(7) of the Internal Revenue
Code. The assets of the employee stock ownership plan shall consist of the
amounts attributable to Employer Matching Contributions and Discretionary
Contributions on or after the Distribution Date. The assets of the employee
stock ownership plan shall be invested primarily in common


                                       -1-



<PAGE>





shares of the Employer ("Employer Stock") which qualify as "employer securities"
within the meaning of section 409(l) of the Internal Revenue Code.

         (a)      Spinoff of the Employer. As of the day prior to the
                  Distribution Date, the Employer and its subsidiaries were
                  members of the controlled group of corporations (within the
                  meaning of section 414(b) of the Internal Revenue Code) that
                  includes Corning. It is contemplated that as of a certain date
                  (the "Distribution Date") on or before December 31, 1996, all
                  of the shares of the Employer ("Employer Stock") held by
                  Corning will be distributed to the shareholders of Corning as
                  a spinoff dividend and the Employer will thereby cease to be a
                  member of the controlled group of corporations that includes
                  Corning. As a result of the spinoff of the Employer from
                  Corning on the Distribution Date, Corning Stock held in
                  Participants' accounts under the Plan will be converted into
                  Corning Stock, CCL Stock and Employer Stock that will be
                  received as dividends with respect to such Corning Stock. The
                  Corning Stock, the dividend CCL Stock and the dividend
                  Employer Stock will each represent a portion of the value of
                  pre- spinoff investments of Participants' accounts in Corning
                  Stock. As provided in Section 7.4, and subject to the
                  provisions thereof, following the Distribution Date,
                  participants may elect to continue holding Corning Stock or
                  CCL Stock in their accounts under the Plan or may elect to
                  sell such shares and reinvest the proceeds in Employer Stock
                  or any other Investment Option subject to the decision by the
                  Employer to direct the liquidation of such amounts. The
                  Corning Stock Fund and the CCL Stock Fund are provided solely
                  to permit the continued holding of Corning and CCL Shares
                  allocated to Participants' accounts following the spinoff of
                  the Employer. Accordingly, following the Distribution Date no
                  future contributions or investment transfers may be made to
                  the Corning Stock Fund or the CCL Stock Fund.

         (b)      Spinoff of Corning Life Sciences, Inc. As the day prior to the
                  Distribution Date, Corning Life Sciences, Inc. ("CCL") and its
                  affiliates were members of the controlled group of
                  corporations (within the meaning of section 414(b) 


                                       -2-



<PAGE>

                  of the Internal Revenue Code) that includes Corning. On the
                  Distribution Date, all of the shares of CCL held by Corning
                  were distributed to the shareholders of Corning as a spinoff
                  dividend and CCL thereby ceased to be a member of the
                  controlled group of corporations that includes Corning. As a
                  result of the spinoff of CCL from Corning the shares of
                  Corning which had been held in Participants' Individual
                  Accounts under the Plan ("Corning Shares") were converted into
                  Corning Stock and shares of CCL and shares of the Employer
                  that were received as dividends with respect to such Corning
                  Shares. The Corning Stock and the dividend CCL and Employer
                  shares each represent the pre-spinoff investments of
                  Participants' Individual Accounts in Corning Stock. As a
                  result of a corporate restructuring, effective as of the
                  Distribution Date Corning Life Sciences, Inc. was renamed
                  Quest Diagnostic Incorporated.



                                       -3-



<PAGE>
                                    ARTICLE I
                                   DEFINITIONS

1.1     As used herein, unless otherwise required by the context, the following
words and phrases shall have the meanings indicated:

        Active Participant - A Participant shall be deemed an Active
Participant with respect to a Fiscal Quarter if he is employed on the last day
of such Fiscal Quarter.

        Actual Contribution Percentage - (a) (1) For each Plan Year, the
average of the ratios, calculated separately for each Eligible Employee in a
specified group, of (A) the amount of Employer Matching Contributions under
Section 3.2 which are allocated to the Individual Account of an Eligible
Employee as of a date within such Plan Year to (B) the Testing Compensation of
such Eligible Employee while an Eligible Employee for such Plan Year.

             (2) When calculating the Actual Contribution Percentage for a
Highly Compensated Employee, all arrangements subject to Code Section 401(m)
maintained by the Employer or an Affiliate in which such Employee participates
(other than those that may not be permissively aggregated) shall be treated as
one arrangement. All matching contributions that are made under two or more
plans that are aggregated for purposes of Code Section 410(b)(other than Code
Section 410(b)(2)(A)(ii)) are to be treated as made under a single plan.

         (b) (1) In the case of a Highly Compensated Employee who is either a 5%
owner or one of the ten most highly compensated Employees and is thereby subject
to the family aggregation rules of Code Section 414(q)(6), the Actual
Contribution Percentage for the family group (which consists of a Highly
Compensated Employee described in this sentence and his HC Family Members and is
treated as one Highly Compensated Employee) is determined by combining the
Employer Matching Contributions and Testing Compensation of all eligible HC
Family Members with those of the Highly Compensated Employee. Except to the
extent taken into account in the preceding sentence, the Employer Matching
Contributions and Testing Compensation of all HC Family Members are disregarded
in determining the Actual Contribution 




                                       -4-



<PAGE>


Percentages for the groups of Highly Compensated Employees and non-highly
compensated employees.

             (2) For purposes of applying the dollar limit on Testing
Compensation, the family group described in paragraph (1) will be treated as a
single Highly Compensated Employee with a single Testing Compensation, and the
dollar limit will be allocated among the members of the family group in
proportion to each member's individual Testing Compensation. Solely for purposes
of the Testing Compensation rule in this paragraph (2), the term "HC Family
Member" shall include only the spouse of the employee and any lineal descendants
of the employee who have not attained age 19 before the close of the Plan Year
in question.

         Actual Deferral Percentage - (a) (1) For each Plan Year, the average of
the ratios, calculated separately for each Eligible Employee in a specified
group, of (A) the amount of Employee Pre-Tax Contributions under Section 3.1
(which are attributable to Deferral Compensation that would have been received
by the Employee during such Plan Year but for his salary reduction agreement)
which are allocated to the Individual Account of an Eligible Employee as of a
date within such Plan Year to (B) the Testing Compensation of such Eligible
Employee while an Eligible Employee for such Plan Year.

             (2) Except as provided in regulations issued by the Secretary of
the Treasury, Actual Deferral Percentage shall be determined without regard to
whether any Employee Pre-Tax Contributions are distributed under Section
3.1(c)(2)(A). When calculating the Actual Deferral Percentage for a Highly
Compensated Employee, all cash or deferred arrangements maintained by the
Employer or an Affiliate in which such Employee participates (other than those
that may not be permissively aggregated) shall be treated as one arrangement.
All elective contributions that are made under two or more plans that are
aggregated for purposes of Code Section 410(b)(other than Code Section
410(b)(2)(A)(ii)) are to be treated as made under a single plan.

         (b) The special HC Family Member rules set forth in subsection (b) of
the definition of Actual Contribution Percentage shall also apply in determining
the Actual Deferral Percentage.

         Affiliate - An organization which is not an Employer, but which must be
considered together with an Employer under Code Sections 414(b), (c), (m) or
(o).

                                      -5-
<PAGE>

         Beneficiary - Any person designated by a Participant under Section 2.3
to receive such benefits as may become payable hereunder after the death of such
Participant.

         Besselaar 401(k) Plan - The G.H. Besselaar Associates Profit Sharing
401(k) Plan, the assets and liabilities of which have been transferred to this
Plan.

         Board - The Board of Directors of the Corporation.

         Calendar Quarter - January 1 - March 31; April 17 - June 30; July 1 -
September 30; October 1 - December 31.

         Code - The Internal Revenue Code of 1986, as amended.

         Committee - The Benefits Administration Committee, as provided for in
Section 8.5.

         Contributions - Payments as provided herein by the Employer to the
Trustee for the purpose of providing the benefits under this Plan.

         Corning - Corning Incorporated, a New York corporation.

         Corning Life Sciences Plan - The Profit Sharing Plan of Corning Life
Sciences Inc. The assets and liabilities of the Corning Life Sciences Plan
representing the account balances of Corning SciCor, Inc. employees have been
transferred to this Plan.

         Corporation - Covance Inc., a Delaware corporation, or any successor
thereto. The Corporation is the sponsor, named Fiduciary, and plan administrator
of the Plan for purposes of ERISA as it relates to the employees of each
Employer.

         Deferral Compensation - The Section 415 Compensation paid to an
Employee by the Employer for his services, excluding reimbursements or other
expense allowances, cash and non-cash fringe benefits (e.g., employee
discounts), moving expenses, deferred compensation and welfare benefits, plus
Employee Pre-Tax Contributions and salary reduction contributions to a Code
Section 125 cafeteria plan. For the Plan Year commencing July 1, 1995 and ending
December 31, 1995, Deferral Compensation in excess of $75,000 shall not be taken
into account. For Plan Years commencing after December 31, 1995, Deferral
Compensation in excess of $150,000 (or such different amount as may be
applicable under Code Section 401(a)(17)(B)) shall not be taken into account.

         Discretionary Contributions - Contributions made by an Employer under
Section 3.3.

                                      -6-
<PAGE>

         Distribution Date - [ ], the effective date of the spinoff of the
Employer from Corning through the distribution of stock dividends in shares of
Corning, CCL and the Employer.

         Effective Date - July 1, 1972, except as set forth below. This
amendment and restatement is generally effective December 31, 1996 . The
Effective Date for the following Employers is as follows:

<TABLE>
<CAPTION>

- -----------------------------------------------------------------------------------------------------------------------
                                     Employer                                                 Effective Date
- -----------------------------------------------------------------------------------------------------------------------

<S>                                                                                          <C>    
Covance Inc. (Corning Pharmaceutical Services, Inc.)                                         January 1, 1997

Covance Clinical and Periapproval Services Inc. (Corning Besselaar,                          January 1, 1996
Inc.)

Covance Clinical Research Unit Inc. (Corning Besselaar Clinical                              January 1, 1996
Research Unit, Inc.)

Covance Periapproval Services Inc. (Corning PACT, Inc.)                                      January 1, 1996

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

Covance Pharmaceutical Packaging Services Inc. (Corning National                             January 1, 1996
Packaging, Inc.)

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

Covance Central Laboratory Services Inc. (Corning SciCor, Inc.)                              January 1, 1996

- -----------------------------------------------------------------------------------------------------------------------
</TABLE>

         Eligible Employee - An Employee eligible for participation under 
Section 2.1.

         Employee - Any person employed by an Employer. Notwithstanding the
preceding sentence, Employee shall not include (1) independent contractors, (2)
any person who is covered by a collective bargaining agreement where such
agreement provides for a different retirement plan, or where no provision is
made for any retirement plan after good faith bargaining between the Employer
and employee representatives and (3) any person who is excluded from
participation hereunder by the terms of his Employer's adoption of this Plan. No
person who is a leased employee of an Employer within the meaning of Code
Section 414(n), or who receives compensation solely for service as a member of
the Board, shall be eligible to participate in this Plan.

         Employee Pre-Tax Account - That portion of a Participant's Individual
Account attributable to the Employee Pre-Tax Contributions allocated to such
Participant under Section 4.2 and any earnings or losses on such contributions.
The Employee Pre-Tax Account of a Participant who was a participant in a Merged
Plan that contained a qualified cash or deferred arrangement shall also hold any
amount transferred to this Plan 


                                       -7-



<PAGE>





from such Merged Plan representing the balance of such Participant's pre-tax
account under such Merged Plan and any earnings and losses thereon.

         Employee Pre-Tax Contributions - Contributions made to the Plan by the
Employer under Section 3.1(a) pursuant to a salary reduction agreement entered
into between the Employer and the Participant.

         Employer - Collectively or individually as the context may indicate,
Covance Inc. (formerly Corning Pharmaceutical Services Inc. and any
participating employer listed in Supplemental B ; and any other entity which (1)
must be considered together with the Corporation under Code Section 414(b), (c)
or (m), (2) has been authorized by the Board to adopt the Plan and (3) by action
of its own board of directors shall have adopted the Plan and, or any successor
to one or more of such entities.

         Employer New Matching Account - That portion of a Participant's
Individual Account attributable to the Employer Matching Contributions allocated
to such Participant under Section 4.3 as of a date after June 30, 1995, and any
earnings and losses on such contributions. The Employer New Matching Account of
a Participant who was formerly a participant in the Corning Life Sciences Plan
also shall hold any amount transferred to this Plan from the Corning Life
Sciences Plan representing employer matching contributions held under the
Corning Life Sciences Plan and any earnings and losses thereon.

         Employer Matching Contributions - Contributions made to the Plan by the
Employer under Section 3.2.

         Employer Old Matching Account - That portion of a Participant's
Individual Account attributable to the Employer Matching Contributions allocated
to such Participant under this Plan as of a date before July 1, 1995, and any
earnings and losses on such contributions. The Employer Old Matching Account of
a Participant who was formerly a participant in the Besselaar 401(k) Plan also
shall hold any amount transferred to this Plan from the Besselaar 401(k) Plan
representing matching contributions made to the Besselaar 401(k) Plan and
earnings and losses thereon.

         Employer Stock - Any class of the Employer's common stock or the
Employer's preferred stock that is convertible into common stock. Employer Stock
includes ESOP Stock.

         Employment Commencement Date - The date on which an Employee first
performs an hour of service for an Employer (even if such date is before the
Effective 

                                       -8-



<PAGE>


Date with respect to such Employer) or, if the sponsor of a Merged Plan is not
an Employer, for the sponsor of a Merged Plan (even if such date is before the
Merger Date).

         ERISA - The Employee Retirement Income Security Act of 1974, as
amended.

         ESOP Stock - Employer securities within the meaning of Code section
409(1) that have been acquired with the proceeds of an Exempt Loan. Unallocated
ESOP Stock shall remain in a suspense account described in Section A-5 until
allocated to Participants' ESOP Accounts pursuant to Section A-9.

         Fiduciary - The Corporation, the Employer, the Trustee, the Committee
and any individual, corporation, firm or other entity which assumes, in
accordance with Article VIII, responsibilities of the Corporation, the Employer,
the Trustee or the Committee respecting management of the Plan or the
disposition of its assets.

         Fund - The Trust Fund.

         Highly Compensated Employee - (a) For any Plan Year, any employee
described in subsection (b) or (c).

         (b)      Any employee who during the immediately preceding Plan Year:

                  (1) was at any time a 5-percent owner (as defined in Code
Section 416(i)(l));

                  (2) received compensation (as defined in Code Section
414(q)(7)) from an Employer or an Affiliate in excess of $50,000 (as adjusted
under Code Section 414(q)(1)); or

                  (3) was at any time an officer and received compensation (as
defined in Code Section 414(q)(7)) from an Employer or an Affiliate greater than
50 percent of the amount in effect under Code Section 415(b)(1)(A) for such
year.

         (c)      Any employee who during the current Plan Year:

                  (1) was at any time a 5-percent owner (as defined in Code
Section 416(i)(l));

                  (2) received compensation (as defined in Code Section
414(q)(7)) from an Employer or an Affiliate in excess of $50,000 (as adjusted
under Code Section 414(q)(1)) and was one of the 100 employees receiving the
most compensation (as defined in Code Section 414 (q)(7)); or


                                       -9-



<PAGE>






                  (3) was at any time an officer who received compensation (as
defined in Code Section 414(q)(7)) from an Employer or an Affiliate greater than
50 percent of the amount in effect under Code Section 415(b)(1)(A) for such year
and was one of the 100 employees receiving the most compensation (as defined in
Code Section 414(q)(7). 

         This definition shall be applied in accordance with Code Section 414(q)
and the regulations issued thereunder.

         (d) For purposes of applying the HC Family Member aggregation rules
under this Plan, Highly Compensated Employee shall also include former employees
who separated prior to the Plan Year being tested and who met the definition of
Highly Compensated Employee in either (1) the Plan Year in which they separated
or (2) any Plan Year ending on or after their 55th birthday.

         HC Family Member - With respect to a Highly Compensated Employee who is
either a 5% owner or one of the ten most highly compensated Employees, the
spouse and the lineal ascendants and descendants (and spouses of such ascendants
and descendants) of any such Highly Compensated Employee.

         Individual Account - The aggregate of a Participant's Employee Pre-Tax
Account, Employer New Matching Account, Employer Old Matching Account, New
Discretionary Account, Old Discretionary Account and Rollover Account.

         Investment Option - The investment vehicle elected by the Participant
in accordance with Section 2.4(a) for investment of his Individual Account. The
Investment Options are the Fidelity Asset Manager Fund, Fidelity Balanced Fund,
Fidelity Contrafund, Fidelity Equity-Income Fund, Fidelity International Growth
& Income Fund, Fidelity Magellan Fund, Fidelity Managed Income Portfolio, and a
stock fund investing primarily in the common stock of the employer as defined in
Section 409(l) of the Code. In addition, effective as of the Distribution Date,
there shall be one or more funds investing primarily in the common stock of the
Employer ("the Employer Stock Funds"). As a result of the spinoff of the
Employer, there are also funds investing entirely in the common stock of Corning
and CCL, which shall not be available to receive new contributions effective as
of the Distribution Date. Effective January 1, 1996, the Fidelity Asset Manager
Fund: Growth and the Fidelity Asset Manager Fund: shall be available as
Investment Options. The Committee may add, change or delete the available
Investment Options at any time.


                                      -10-



<PAGE>



         Limitation Year - There is a short "limitation period" commencing July
1, 1995 and ending December 31, 1995. Effective January 1, 1996, the Limitation
Year is January 1 - December 31.

         Merged Plan - The Besselaar 401(k) Plan, the Corning Life Sciences Plan
and the National Packaging Plan, either individually or collectively as the case
may be.

         Merger Date - The Merger Date, with respect to the following plans, the
assets and liabilities of which have been transferred to this Plan, is as
follows:

<TABLE>
<CAPTION>

==============================================================================================================
                                Name                                                Merger Date
- --------------------------------------------------------------------------------------------------------------
<S>                                                                              <C>                            
G. H. Besselaar Associates Profit Sharing 401(k) Plan                            January 1, 1996

- --------------------------------------------------------------------------------------------------------------
National Packaging Systems, Inc. 401(k) Plan                                     January 1, 1996
- --------------------------------------------------------------------------------------------------------------
Profit Sharing Plan of Corning Life Sciences Inc. (assets and
liabilities representing account balances of Corning SciCor, Inc.                 January 1, 1996
employees)
==============================================================================================================
</TABLE>

         National Packaging Plan - The National Packaging Systems, Inc. 401(k)
Plan, the assets and liabilities of which have been transferred to this Plan.

         Net Asset Value - With respect to any mutual fund that the Committee
may designate as an available Investment Option, the total net assets of the
respective fund divided by the number of outstanding shares of the respective
fund.

         New Discretionary Account - That portion of a Participant's Individual
Account attributable to the Discretionary Contributions allocated to such
Participant under Section 4.4 as of a date after June 30, 1995, and any earnings
and losses on such contributions. The New Discretionary Account of a Participant
who was formerly a participant in the Corning Life Sciences Plan also shall hold
any amount transferred to this Plan from the Corning Life Sciences Plan
representing discretionary contributions held under the Corning Life Sciences
Plan and any earnings and losses thereon.

         Normal Retirement Age - Age 65.

         Old Discretionary Account - That portion of a Participant's Individual
Account attributable to profit sharing contributions made by the Employer on
behalf of Plan Participants for periods prior to January 1, 1986 and
Discretionary Contributions allocated to such Participant under this Plan as of
a date before July 1, 1995, and any earnings and losses on such contributions.

                                      -11-

<PAGE>


         Participant - Any Employee or former Employee who has an Individual
Account balance and any Employee who has met the eligibility requirements of
Section 2.1. Participation ends in accordance with Section 2.2.

         Period of Severance - The period of time commencing on an Employee's
Severance from Service Date and ending on his Reemployment Commencement Date.

         Plan - The Stock Purchase Savings Plan of Covance Inc. formerly known
as The Corning Pharmaceutical Services Inc. Retirement Savings Plan (July 1,
1995 Restatement), as renamed herein the Stock Purchase Savings Plan of Covance
Inc., as duly amended. Prior to July 1, 1995, the Plan was known as the Hazleton
Pre-Tax Savings Plan.

         Plan Year - There is a short Plan Year commencing July 1, 1995 and
ending December 31, 1995. Effective January 1, 1996, the Plan Year is January 1
- - December 31.

         Prime Rate - The "prime rate," as published in The Wall Street Journal.

         Reemployment Commencement Date - The first date on which an Employee
again performs an hour of service following a Period of Severance.

         Rollover Account - That portion of a Participant's Individual Account
attributable to his rollover contributions under Section 3.4 and any earnings or
losses on such contributions. The Rollover Account of a Participant who was
formerly a participant in the Besselaar 401(k) Plan also shall hold any amount
transferred to this Plan from the Besselaar 401(k) Plan representing rollover
contributions made to the Besselaar 401(k) Plan and any earnings and losses
thereon. The Rollover Account of a Participant who was formerly a participant in
the Corning Life Sciences Plan also shall hold any amount transferred to this
Plan from the Corning Life Sciences Plan representing rollover contributions
held under the Corning Life Sciences Plan and any earnings and losses thereon.

         Section 415 Compensation - An Employee's wages as defined in Code
Section 3401(a) and all other payments of compensation to an Employee by an
Employer (in the course of the Employer's trade or business) for which the
Employer is required to furnish the Employee a written statement under Code
Sections 6041(d) and 6051(a)(3). Section 415 Compensation shall be determined
without regard to any rules that limit the remuneration included in wages based
on the nature or location of the employment or the services performed (such as
the exception for agricultural labor in Code Section 

                                      -12
<PAGE>


3401(a)(2)). Section 415 Compensation does not include Employee Pre-Tax
Contributions to this Plan and salary reduction contributions to a Code Section
125 cafeteria plan.

         Severance from Service Date - The date on which an Employee quits,
retires, is discharged or dies, provided he does not earn an hour of service for
an Employer within 12 months after such date.

         Target Rate - The rate at which Employee Pre-Tax Contributions may be
made by each eligible Highly Compensated Employee for the balance of the Plan
Year so that one of the two qualifying tests under Section 3.6(a) will be
satisfied for such Plan Year.

         Testing Compensation - For each Participant, his Deferral Compensation.
For the Plan Year commencing July 1, 1995 and ending December 31, 1995, Testing
Compensation shall not be taken into account. For Plan Years commencing after
December 31, 1995, Testing Compensation in excess of $150,000 (or such different
amount as may be applicable under Code Section 401(a)(17)(B)) shall not be taken
into account.

         Total and Permanent Disability - A Participant shall be considered
totally and permanently disabled once the Committee, in its sole discretion,
determines that he has incurred a disability which renders him totally and
permanently unable to satisfactorily perform his usual duties for his Employer
or the duties of such other position which the Employer makes available to him
and for which he is qualified by reason of his training, education or
experience. Such determination shall be made by the Committee based on medical
reports and such other evidence which the Committee determines to be
satisfactory; provided, however, that conclusive evidence that the Participant
is eligible for and is receiving disability benefits under the provisions of the
Federal Social Security Act shall be sufficient to deem the Participant totally
and permanently disabled.

         Trust Agreement - The agreement entered into between the Employer and
the Trustee under Article VII.

         Trust Fund - All funds received by the Trustee together with all
income, profits and increments thereon, and less any expenses or payments made
out of the Trust Fund.

         Trustee - Such individual, individuals, financial institution, or a
combination of them as shall be designated in the Trust Agreement to hold in
trust any assets of the Plan for the purpose of providing benefits under the
Plan, and shall include any successor trustee to the Trustee initially
designated thereunder.

                                      -13-
<PAGE>

         Valuation Date - The date on which a Participant's Individual Account
is valued pursuant to Section 5.9. Subject to Section 5.9(b), the Valuation Date
shall be a date that falls as soon as administratively feasible after a
properly-completed written request for a distribution is received by an
authorized representative of the Committee.

         Year of Vesting Service - (a) As of any date, the aggregate of an
Employee's periods of vesting service, including any vesting service credited
under subsection (b) and excluding any vesting service disregarded under
subsection (c). For purposes of this subsection (a), a period of vesting service
is each period of time required to be recognized under this Plan commencing on
the Employee's Employment Commencement Date, or any subsequent Reemployment
Commencement Date, and ending on a Severance from Service Date.

                   (b) Vesting service shall also include the following:

                       (1) Periods of employment with an Affiliate (while such
organization is an Affiliate) which would have constituted vesting service had
the Participant been employed by an Employer shall be included as if such
periods had been performed for an Employer; and

                       (2) Periods of employment with an Employer other than as
an Employee, including employment as a leased employee within the meaning of
Code Section 414(n), which would have constituted vesting service had the
Participant been employed as an Employee shall be included as if such periods
had been performed as an Employee.

                       (3) With respect to any person employed by the Employer
on or before December 31, 1998, periods of employment with Corning or Corning
Clinical Laboratories, Inc. (formerly Corning Life Sciences, Inc.) that would
have been counted as vesting service under the terms of the plan if such service
was rendered to the Employer as an Employee.

                  (c) Years of Vesting Service recognized under the preceding
subsections shall not include any vesting service earned prior to a five-year
Period of Severance if, when the Period of Severance commenced, the Employee had
not yet earned any vested interest in his Employer New Matching Account or his
New Discretionary Account under Sections 5.5 or 11.1.


                                      -14-



<PAGE>
                                   ARTICLE II
                          ELIGIBILITY AND PARTICIPATION

2.1      Eligibility

         Any Employee who was a Participant in this Plan on December 30, 1996
shall remain a Participant on December 31, 1996, as long as he remains an
Employee on such date. Any Employee who was not a Participant in this Plan on
December 31, 1996 shall become a Participant on the date on which he completes
an hour of service with an Employer. Notwithstanding the preceding sentence, (a)
any Employee who was a participant in a Merged Plan immediately before the
Merger Date with respect to such Merged Plan shall become a Participant in this
Plan on such Merger Date; and (b) any Employee who was employed by an employer
which sponsored a Merged Plan immediately before the applicable Merger Date, but
was not a participant in such Merged Plan, shall be credited with service with
the sponsor prior to the Merger Date for purposes of determining when he shall
become eligible to participate in this Plan. Notwithstanding the foregoing, an
Employee shall become a Participant for purposes of receiving Employer Matching
Contributions under Section 3.2 on the date 6 months after he completes one hour
of service with an Employer. 

2.2      Participation

         (a) Each Employee who is a Participant may, by filing a
properly-completed agreement with an authorized representative of the Committee,
enter into a salary reduction agreement in accordance with Section 3.1(a). Such
agreement shall be effective as of the first payroll period coincident with or
next following the later of (1) the date the Employee becomes a Participant, or
(2) the date on which the agreement is processed. If an Employee elects not to
enter into a salary reduction agreement on the date he is first eligible, he
may, by filing a properly-completed agreement with an authorized representative
of the Committee, enter into such an agreement effective as of the first payroll
period coincident with or next following the date on which the agreement is
processed.

         (b) Each person who becomes a Participant shall remain a Participant so
long as he remains an Employee or maintains an Individual Account balance. If a
Participant 


                                      -15-



<PAGE>





terminates employment with no balance in his Individual Account, he shall cease
being a Participant upon his termination of employment. In the event an Employee
ceases to be a Participant and is later reemployed as an Employee, he shall once
again become a Participant upon his reemployment date.

2.3      Beneficiary Designation

         (a) Upon commencing participation, each Participant shall designate a
Beneficiary by filing a properly-completed form with an authorized
representative of the Committee. In the absence of any valid designation of
Beneficiary, the Participant shall be deemed to have designated his spouse as
his Beneficiary, and if the Participant is unmarried upon his death, he shall be
deemed to have designated his estate as his Beneficiary.

         (b) The Beneficiary of a married Participant shall be his spouse unless
the Participant designates someone other than his spouse as his Beneficiary, and
the Participant files with an authorized representative of the Committee his
spouse's written consent to such designation. Such spousal consent shall be on a
form approved by the Committee, shall be irrevocable by the spouse, shall
acknowledge the effect of such designation and shall be witnessed by a Committee
member (or an authorized representative) or a notary public. The spouse may
alternatively execute an irrevocable general consent that does not identify the
designated Beneficiary and which allows the Participant to make future changes
in the Beneficiary designation without spousal consent. Any such general consent
shall satisfy the requirements of Treasury Regulation ss.1.401(a)-20 Q&A-31(c).

         (c) If an unmarried Participant later marries, or if a married
Participant later remarries, any prior designation by such Participant of a
Beneficiary other than the spouse to whom he is married on his date of death
shall be null and void unless consented to by such spouse in the manner provided
in subsection (b).

         (d) The interpretation of the Committee with respect to any Beneficiary
designation, subject to applicable law, shall be binding and conclusive upon all
parties, and no person who claims to be a Beneficiary, or any other person,
shall have the right to question any action of the Committee.


                                      -16-



<PAGE>





         (e) The rights of any spouse or Beneficiary hereunder shall be subject
to the provisions of any qualified domestic relations order within the meaning
of ERISA Section 206(d)(3).

2.4      Investment Option Specification

         (a) This subsection (a) shall apply only to a Participant who became a
Participant on or after January 1, 1996. That portion of such a Participant's
Individual Account which represents Contributions made on his behalf with
respect to his first calendar month of participation automatically shall be
invested in the Fidelity Asset Manager Fund, unless the Committee specifies a
different Investment Option for this purpose. On or about the 15th day of the
next calendar month, the Participant may change his Investment Option
specification in accordance with subsection (b). Initial Investment Option
specifications shall be in increments of 5%. In the absence of any valid
Investment Option specification, a Participant's Individual Account shall
continue to be invested in the Fidelity Asset Manager Fund, unless the Committee
specifies a different Investment Option for this purpose.

         (b) A Participant may change his Investment Option specification with
respect to Contributions to be made in the future and with respect to amounts
already in his Individual Account by calling Fidelity Investments. Telephone
exchanges between Investment Options shall be subject to such administrative
procedures as have been instituted by Fidelity Investments and adopted by the
Committee. The Committee, in its sole discretion, may modify such procedures
after providing reasonable notification to Participants.

         (c) On or after the Distribution Date, each such election in effect
under the Plan to invest in the Employer Stock Fund shall be deemed an election
under the Plan to invest in the Corning Stock Fund, the CCL Stock Fund and the
Employer Stock Fund proportionately to the dividend received from Corning as of
such date.

2.5      Notification of Individual Account Balance

         As of the last day of each calendar quarter, the Committee shall notify
each Participant of the amount of his share in the Contributions for the period
just completed and the balance of his Individual Account, including
distributions, loans and withdrawals, if any, since the effective date of the
last statement.


                                      -17-



<PAGE>





2.6      Diversification of Investments or Distribution for Certain Participants

         For purposes of this Section 2.6, "Qualified Participant" shall mean a
Participant who has completed at least five years of participation in the ESOP
portion of the Plan: excluding any participation prior to December 31, 1996.

         "Qualified Election Period" shall mean the period of six Plan Years
beginning with the later of (i) the Plan Year in which the Participant first
becomes a Qualified Participant, or (ii) the Plan Year which includes the tenth
anniversary of the Distribution Date; provided that the Qualified Election
Period shall not begin unless and until the fair market value of Employer Stock
allocated to the Participant's ESOP Account is at least $500 as of any Valuation
Date.

         No later than 90 days after the last day of each Plan Year during his
Qualified Election Period, each Qualified Participant shall be permitted to
direct the Plan as to the investment of 100 percent (100%) of an amount equal to
the value of his Employer Match Account attributable to Employer Stock, plus
amounts previously transferred or distributed pursuant to an election under this
Section, to the extent such percentage exceeds the amounts transferred or
distributed pursuant to a prior election. No later than 90 days after the close
the last Plan Year in the Participant's Qualified Election Period, a Qualified
Participant may direct the Plan to the investment 100 percent (100%) of an
amount equal to the value of his Account balance attributable to Employer Stock,
plus amounts previously transferred or distributed pursuant to an election under
this Section, to the extent such a percentage exceeds the amounts transferred or
distributed pursuant to a prior election under this Section. The Participant's
direction shall be provided to the Committee in writing and shall be effective
no later than 180 days after the close of the Plan Year to which the direction
applies.

         The Plan shall satisfy the Participant's direction by transferring the
portion of his Account that is covered by the election to another qualified plan
(including the portion of this Plan that does not constitute an ESOP) of the
Employer that accepts the transfer and permits employee-directed investments
and offers the Participant at least three investment options (not inconsistent
with regulations prescribed by the Secretary of the Treasury) other than
Employer Stock. The transfer shall be made, and the amount transferred shall be
invested in accordance with the Participant's election, no later than 90 days
after the last day of the period during which the election can be made. If at
the time of an election 

                                      -18-
<PAGE>

no Employer then maintains a qualified plan that is eligible to receive the
portion of the Participant's Account that is covered by the election, the Plan
shall distribute that portion to the Qualified Participant within 90 days after
the last day of the period during which the election can be made. This Section
shall apply notwithstanding any other provision of the Plan, other than such
provisions as require the consent of the Participant to a distribution with a
present value in excess of $3,500. If the Participant does not consent to such a
distribution, the amount as to which the election is made shall be retained in
the Plan and the diversification requirement of this Section shall be deemed to
have been satisfied. Notwithstanding the foregoing, the Participant's
diversification election under the section shall not be effective unless
consented thereto by the Participant's spouse in accordance with the
requirements under section 5.6(d).

                                      -19-



<PAGE>

                                   ARTICLE III
                                  CONTRIBUTIONS

3.1      Employee Pre-Tax Contributions

         A Participant may have Employee Pre-Tax Contributions made to the Plan
on his behalf as follows:

         (a) (1) A Participant may enter into a salary reduction agreement with
his Employer in which it is agreed that the Employer will reduce the
Participant's Deferral Compensation during each pay period by a designated
percentage and contribute that amount so determined to the Plan on behalf of the
Participant. The Employer may disregard or modify a Participant's salary
reduction agreement (including a salary reduction agreement subject to the
special limit set forth in the last sentence of this paragraph) to the extent
necessary to insure that (1) the Actual Deferral Percentage test of Code Section
401(k) as set forth in Section 3.6 is met, (2) the excess deferral rules of
subsection (c) are met, or (3) the limitations set forth in Sections 3.5 or 4.6
are not exceeded. Employee Pre-Tax Contributions may be any whole percentage
between 1% and 15% of the Deferral Compensation otherwise payable to the
Participant during the applicable payroll period. Notwithstanding the preceding
sentence, with respect to a Participant who is a Highly Compensated Employee as
defined in Section 414(q) of the Code, the Employee Pre-Tax Contributions of
such a Participant may not exceed the maximum deferral percentage set from time
to time by the Committee in order for the Plan to satisfy the Actual Deferral
Percentage Test under Section 3.6 for the Plan Year.

             The salary reduction agreement of an Employee who becomes eligible
to participate in the Plan shall be effective under the rules set forth in
Section 2.2.

             (2) Employee Pre-Tax Contributions shall be invested among the
various Investment Options in accordance with the Employee's outstanding
Investment Option election as in effect under Section 2.4.

         (b) (1) A Participant who has in effect a salary reduction agreement
may elect to change such agreement, including prospectively suspending such
agreement, by filing a properly-completed written notice with an authorized
representative of the 

                                      -20-
<PAGE>

Committee. Such election shall become effective as of the first payroll period
coincident with or next following the date on which it is processed.

             (2) Amounts contributed by salary reduction shall be remitted to
the Trustee in accordance with Department of Labor Regulations at 29 C.F.R.
ss.2510.3-102. Contributions once elected to be deferred by a Participant shall
be credited to his Employee Pre-Tax Account under Section 4.2(a).

         (c) Excess deferrals

             (1) No Participant may have Employee Pre-Tax Contributions made on
his behalf under this Plan in any calendar year which in the aggregate exceed
$7,000 or such greater amount as may be specified by the Secretary of the
Treasury for purposes of Code Section 402(g)(1). For purposes of the preceding
sentence, Employee Pre-Tax Contributions are deemed made as of the pay date for
which the salary is deferred, regardless of when the contributions are actually
made to the Trust Fund.

             (2) (A) If in any calendar year the aggregate of a Participant's
Employee Pre-Tax Contributions made on his behalf under this Plan, plus his
other elective deferrals under any other qualified cash or deferred arrangement
(as defined in Code Section 401(k)) maintained by any sponsor, under any
simplified employee pension (as defined in Code Section 408(k)), or used to have
an annuity contract purchased on his behalf under Code Section 403(b), exceed
the limitations of paragraph (1), then no later than the March 1 following such
calendar year the Participant may notify the Committee (i) that he has exceeded
the limitation and (ii) of the amount of his Employee Pre-Tax Contributions
under this Plan which he wants distributed to him (and earnings thereon)
notwithstanding his salary reduction agreement so that he will not exceed the
limitation. The Committee may require the Participant to provide reasonable
proof that he has exceeded the limitation of paragraph (1).

         If in any calendar year the aggregate of a Participant's Employee
Pre-Tax Contributions made on his behalf under the Plan, plus his other elective
deferrals under any other qualified cash or deferred arrangement (as defined in
Code Section 401(k)) maintained by the Employer, under a simplified employee
pension (as defined in Code Section 408(k)) sponsored by the Employer, or used
to have the Employer purchase an annuity contract on his behalf under Code
Section 403(b), exceed the limitations of paragraph (1), then the Participant
shall be deemed to have notified the Committee that



                                      -21-



<PAGE>


(i) he has exceeded the limitation and (ii) he wants distributed to him the
amount of such excess deferrals (and income thereon) notwithstanding the salary
reduction agreement so that he will not exceed the limitation. No later than the
next April 15, the Committee may (but shall not be obligated to) make the
distribution requested, or deemed to have been requested, by the Participant
under this subparagraph. Such distribution may be made notwithstanding any other
provision of law or this Plan. Except as otherwise provided by regulations
issued by the Secretary of the Treasury, such distribution shall not reduce the
amount of Employee Pre-Tax Contributions used in computing Actual Deferral
Percentage, or the amount of Employee Pre-Tax Contributions considered as Annual
Additions under Section 4.6. Any amounts not distributed under this subparagraph
shall continue to be held in accordance with the terms of this Plan.

             (B) After a distribution of excess Employee Pre-Tax Contributions
(if any) under subparagraph (A), Employer Matching Contributions made with
respect to such distributed Employee Pre-Tax Contributions (if any) shall be
withdrawn (with earnings thereon) from such Participant's Employer New Matching
Account and applied to reduce future Employer Matching Contributions under
Section 3.2.

3.2      Employer Matching Contributions

         Subject to Sections 3.5, 3.8 and 3.9, as of each calendar month, the
Employer shall make Employer Matching Contributions to the Trust Fund equal to
300% of the Employee Pre-Tax Contributions made by each eligible Participant
with respect to such calendar month (taking into account only those Employee
Pre-Tax Contributions made by the Participant with respect to such month which
are made at a rate that does not exceed 1% of the Participant's Deferral
Compensation) and 50% of the Employee Pre-Tax Contributions made by each
Participant with respect to such calendar month (taking into account additional
Employee Pre-Tax Contributions made by the Participant with respect to such
calendar month which are made at a rate that does not exceed 5% of the
Participant's Deferral Compensation).

         The Employer Matching Contributions shall be invested in Employer
Stock.

         The Employer Matching Contribution otherwise required under this
Section 3.2 for any Plan Year shall be reduced by the fair market value
(determined as of December 31 of that plan year) of the Employer Stock
attributable to an Exempt Loan and allocated to the accounts of Participants, as
provided in Supplement A.

                                      -22-



<PAGE>



3.3      Discretionary Contributions

         As of the last day of each Fiscal Quarter, the Corporation, at the
discretion of the Board, may make a Discretionary Contribution. Such
Discretionary Contribution, if made, shall be expressed as a percentage of
Deferral Compensation and shall be allocated in accordance with Section 4.4. No
Discretionary Contribution shall be made with respect to any Participant who is
not an Active Participant for the applicable Fiscal Quarter. The Employer shall
also contribute sufficient Discretionary Contributions as may be required by
Section 11.1(b). 

3.4      Rollover Contributions

         Subject to the approval of the Committee, an Employee (regardless of
whether he has satisfied the initial eligibility requirements of Section 2.1)
may make a rollover contribution to the Plan, provided it qualifies for tax free
rollover treatment under Code Sections 402(c) or 408(d). Rollover contributions
must be in cash; contributions in-kind shall not be permitted. Such a
contribution shall be held in the Employee's Rollover Account and shall be 100%
vested at all times. The rollover contribution of an Employee who has not
satisfied the initial eligibility requirements of Section 2.1 shall be invested
in the Fidelity Asset Manager Fund, unless and until he makes a different
Investment Option specification pursuant to Section 2.4. The rollover
contribution of an Employee who has already satisfied the initial eligibility
requirements of Section 2.1 shall be invested in accordance with the Employee's
outstanding Investment Option specification. 

3.5      Maximum Deductible Contribution

         In no event shall the Employer be obligated to make a Contribution for
a Plan Year in excess of the maximum amount deductible by it under Code Section
404(a)(3).

3.6      Actual Deferral Percentage Test

         (a) During each Plan Year, the Committee periodically shall monitor
Plan participation to determine whether the rate of Employee Pre-Tax
Contributions made pursuant to Section 3.1(a) for such Plan Year meets either of
the following qualifying tests (applied subject to Section 3.9):

             (1) The Actual Deferral Percentage for the group of eligible Highly
Compensated Employees will not exceed 125% of the Actual Deferral Percentage for
the group of all other Eligible Employees, or

                                      -23-
<PAGE>

             (2) The Actual Deferral Percentage for the group of eligible Highly
Compensated Employees will not exceed the Actual Deferral Percentage for the
group of all other Eligible Employees by more than two percentage points and by
more than 200%.

         (b) If the Committee determines during a Plan Year that neither of the
qualifying tests under subsection (a) shall be met in that Plan Year, then the
Committee, in its sole discretion, may require each Participant who is a Highly
Compensated Employee and whose rate of Employee Pre-Tax Contributions exceeds
the Target Rate to reduce his rate of Employee Pre-Tax Contributions for the
balance of such Plan Year to the extent necessary to ensure that his Employee
Pre-Tax Contributions will not exceed the Target Rate.

         (c) If, after the end of a Plan Year, the Committee determines that
neither of the qualifying tests under subsection (a) above shall be met for such
Plan Year, the Committee shall determine whether to follow the procedure set
forth in paragraph (1) or the procedure set forth in paragraph (2), as follows:

             (1) The Committee shall direct the Trustee to distribute,
preferably within 2 1/2 months after the last day of such Plan Year, but in any
event no later than the last day of the Plan Year immediately following such
Plan Year, to Highly Compensated Employees that portion of the Employee Pre-Tax
Contributions made on their behalf for such Plan Year (adjusted for income
allocable to such portion) necessary to ensure that one of the two qualifying
tests under subsection (a) shall be satisfied for such Plan Year. Contributions
made on behalf of Highly Compensated Employees shall be distributed under the
rules prescribed in Treasury Regulation ss.1.401(k)-1(f)(3). The amount of any
Employee Pre-Tax Contributions to be distributed under this paragraph (1) shall
be reduced by any excess deferrals previously distributed under Section
3.1(c)(2) for the calendar year ending in the same Plan Year. Similarly, any
excess deferrals to be distributed under Section 3.1(c)(2) shall be reduced by
any excess Employee Pre-Tax Contributions previously distributed under this
paragraph (1) for the Plan Year beginning in such calendar year. In connection
with a distribution of excess Employee Pre-Tax Contributions under this
paragraph (1), Employer Matching Contributions made with respect to distributed
Employee Pre-Tax Contributions (if any) shall be withdrawn (with earnings
thereon) from the Participant's Employer New Matching Account and applied to
reduce future Employer Matching Contributions under Section 3.2.

                                      -24-
<PAGE>

             (2) As of the last day of such Plan Year, the Employer shall
contribute to the Employee Pre-Tax Account of each Participant who is not a
Highly Compensated Employee and who has elected under Section 3.1(a) to have
Employee Pre-Tax Contributions made on his behalf during such Plan Year that
amount, expressed as a uniform percentage of the Deferral Compensation of each
such Participant for such Plan Year, necessary to ensure that one of the two
qualifying tests under subsection (a) shall be satisfied for such Plan Year. All
contributions made by the Employer under this paragraph (2) shall be paid to the
Trustee no later than the last day of the Plan Year immediately following such
Plan Year and credited to the affected Participants' Employee Pre-Tax Accounts
as of the last day of the Plan Year immediately preceding the Plan Year in which
such contribution was made and shall be immediately 100% vested. Notwithstanding
the foregoing, for purposes of determining the amount of a Participant's
Employer Matching Contribution under Section 3.2, such contributions made by the
Employer under this paragraph (2) shall not be treated as Employee Pre-Tax
Contributions.

3.7 Payment of Contributions to Trustee 

         Unless an earlier time for contribution is specified elsewhere in this
Plan, in all events the Employer shall pay to the Trustee its Contributions for
each Plan Year within the time prescribed by law, including extensions of time
for the filing of its federal income tax return for the Employer's taxable year
during which such Plan Year ended.

3.8 Actual Contribution Percentage Test 

         (a) As of the last day of each Plan Year, the Committee shall determine
whether the rate of Employer Matching Contributions made under Section 3.2 for
such Plan Year meets either of the following qualifying tests (applied subject
to Section 3.9):

                  (1) The Actual Contribution Percentage for the group of
eligible Highly Compensated Employees does not exceed 125% of the Actual
Contribution Percentage for the group of all other Eligible Employees, or

                  (2) The Actual Contribution Percentage for the group of
eligible Highly Compensated Employees does not exceed the Actual Contribution
Percentage for the group of all other Eligible Employees by more than two
percentage points and by more than 200%.

                                      -25-
<PAGE>

         (b) If the Committee determines that neither of the qualifying tests
under subsection (a) shall be met in that Plan Year, then the Committee shall
direct the Trustee to distribute, preferably within 2 1/2 months after the last
day of such Plan Year, but in any event no later than the last day of the Plan
Year immediately following such Plan Year, to Highly Compensated Employees that
portion of the Employer Matching Contributions made on their behalf for such
Plan Year (adjusted for income allocable to such portion) necessary to ensure
that one of the two qualifying tests under subsection (a) shall be satisfied for
such Plan Year. (Employer Matching Contributions which are not 100% vested shall
be forfeited and allocated under Section 4.5 in lieu of being distributed.)
Employer Matching Contributions made on behalf of Highly Compensated Employees
shall be distributed (or forfeited, if applicable) under the rules prescribed in
Treasury Regulation ss.1.401(m)-1(e)(2).

3.9 Multiple Use Restrictions 

         The application of the Actual Deferral Percentage test in Section 3.6
and the Actual Contribution Percentage test in Section 3.8 shall be coordinated
in accordance with regulations issued by the Secretary of the Treasury under
Code Section 401(m)(9), so as to prohibit the multiple use of the alternative
limitations set forth in Sections 3.6(a)(2) and 3.8(a)(2). Corrections required
by the multiple use restriction shall be effected by a reduction for any Highly
Compensated Employee participating in this Plan of the otherwise permissible
Employee Pre-Tax Contributions under Section 3.1 or Employer Matching
Contributions under Section 3.2 as shall be designated by the Employer.

         Notwithstanding the foregoing, this limitation shall be applied after
satisfying the mandatory disaggregation rules applicable to the portion of a
plan that constitutes an ESOP and the portion that does not constitute an ESOP.

                                      -26-



<PAGE>

                                   ARTICLE IV
                       ALLOCATIONS TO INDIVIDUAL ACCOUNTS

4.1      Individual Accounts

         (a) The Committee shall establish and maintain an Individual Account in
the name of each Participant, comprised of an Employee Pre-Tax Account, an
Employer New Matching Account, an Employer Old Matching Account, a New
Discretionary Account, an Old Discretionary Account and a Rollover Account to
which the Committee shall credit all amounts allocated to each such Participant
under this Article IV.

         (b) Separate accounts shall be maintained for all former Employee
Participants who have an interest in the Plan.

         (c) The maintenance of separate accounts shall not require a
segregation of the Trust assets and no Participant shall acquire any right to or
interest in any specific asset of the Trust as a result of the allocations
provided for in the Plan.

4.2      Allocation of Employee Pre-Tax Contributions

         A Participant's Employee Pre-Tax Contributions under Section 3.1 shall
be allocated to the Participant's Employee Pre-Tax Account, and shall be
invested in accordance with the Participant's outstanding Investment Option
specification. Allocations for Highly Compensated Employees shall be subject to
Sections 3.6 and 3.9.

4.3      Allocation of Employer Matching Contributions

         As of each calendar month, a Participant's allocable share of the
Employer Matching Contributions made on his behalf under Section 3.2 shall be
allocated to his Employer New Matching Account and shall be invested in
accordance with that Section , provided, however, that after the Distribution
Date, the Employer Matching Contribution will be invested 100% in Employer
Stock. Allocations for Highly Compensated Employees shall be subject to Sections
3.1(c)(2)(B), 3.6(c)(1), 3.8 and 3.9. 

4.4      Allocation of Discretionary Contributions

         (a) A Participant's allocable share as determined under subsection (b)
of the Discretionary Contribution shall be credited to the Participant's New
Discretionary Account as of the last day of the Fiscal Quarter for which the
Corporation shall make a Discretionary Contribution under Section 3.3 and shall
be invested in accordance with the


                                      -27-
<PAGE>


Participant's outstanding Investment Option specification, provided, however,
that the Employer may direct that all or any portion of such contribution shall
be invested in Employer Stock.

         (b) Each Participant who is an Active Participant for the Fiscal
Quarter with respect to which the Corporation shall make a Discretionary
Contribution shall receive an allocation of the Discretionary Contribution. No
other Participant shall receive an allocation. Each Active Participant shall
receive an amount equal to the Discretionary Contribution, expressed as a
percentage of Deferral Compensation, multiplied by the Active Participant's
Deferral Compensation during the Fiscal Quarter. 

4.5      Allocation of Forfeitures

         As of the last day of each Fiscal Quarter, any forfeitures arising
under Sections 3.8(b) or 5.5(c) shall be used to the extent necessary to restore
a Participant's Employer New Matching Account and New Discretionary Account as
provided in Section 5.5(c)(1), and/or shall be applied to reduce Discretionary
Contributions under Section 3.3 and Employer Matching Contributions under
Section 3.2.

4.6      Maximum Additions

         (a) Notwithstanding anything herein to the contrary but subject to
subsection (b), the sum of the Employee Pre-Tax Contributions, Employer Matching
Contributions and Discretionary Contributions allocated to a Participant's
Individual Account for any Limitation Year (the "Annual Additions"), when
combined with any annual additions credited to the Participant for the same
period under another qualified defined contribution plan maintained by the
Employer or an Affiliate, shall not exceed the lesser of the following:

             (1) $30,000 or such larger amount as may be determined under Code
Section 415(c)(1)(A); or

             (2) 25% of the Participant's total Section 415 Compensation
received from the Employer for such Limitation Year.

         (b) In the event a Participant is covered by more than one defined
contribution plan maintained by the Employer (or an Affiliate), the maximum
Annual Additions to this Plan shall be decreased as determined necessary by the
Employer to insure that the limitations of Code Section 415(c) are not exceeded.


                                      -28-

<PAGE>


         In the event that corrective adjustments in the Annual Additions to any
Individual Accounts are required due to a reasonable error in estimating a
Participant's compensation or in determining the amount of Employee Pre-Tax
Contributions that may be made with respect to any Participant under the annual
additions limit of Sections 4.6(a) and (b), the adjustment shall first be made
by reducing the Employee Pre-Tax Contributions, next the Discretionary
Contributions, and finally the Employer Matching Contributions.

         Any amounts withheld or taken from a Participant's Individual Account
pursuant to the above shall be segregated in the Trust Fund in a separate
account and applied toward the Contribution of the Employer for the next
Limitation Year, except that Employee Pre-Tax Contributions shall be distributed
to the Participant who made them.

         (c) A Participant's annual additions with respect to Employer Stock
allocable to the Participant's Employer Matching Contribution Account and
attributable to an Exempt Loan shall be determined on the basis of the lesser of
contributions thereto or the value of Employer Stock released from the Suspense
Account and, if no more than one third of the Employer Matching Contributions
which are deductible under Section 404(a)(9) of the Code by reason of their
application to make payments on an Exempt Loan are allocated to Highly
Compensated Employees, a Participant's annual additions shall not include
employer contributions which are deductible under Section 404(a)(9)(B) of the
Code by reason of their applications to the payment of interest on an Exempt
Loan or forfeitures of Employer Stock attributable to an Exempt Loan.

4.7      Multiple Plan Participation

         (a) If a Participant is a participant in a defined benefit plan
maintained by the Employer, the sum of his defined benefit plan fraction
(determined in subsection (c)) and his defined contribution plan fraction
(determined in subsection (b)) for any Limitation Year may not exceed 1.0.

         (b) The term "defined contribution plan fraction" shall mean a
fraction, the numerator of which is the sum of all of the Annual Additions to
the Participant's Individual Account under this Plan as of the close of the
Limitation Year and the denominator of which is the sum of the lesser of the
following amounts determined for such Limitation Year and for each prior
Limitation Year of employment with the Employer:

                                      -29-
<PAGE>

             (1) the product of 1.25 multiplied by the dollar limitation in
effect under Section 4.6(a)(1) for such Year; or

             (2) the product of 1.4 multiplied by an amount determined under
Section 4.6(a)(2) for such Year.

         (c) The term "defined benefit plan fraction" shall mean a fraction the
numerator of which is the Participant's projected annual benefit determined as
of the close of the Limitation Year and the denominator of which is the lesser
of:

             (1) the product of 1.25 multiplied by the dollar limitation in
effect under Code Section 415(b)(1)(A) for such Limitation Year; or

             (2) the product of 1.4 multiplied by the amount which may be taken
into account under Code Section 415(b)(1)(B) with respect to each individual
under the Plan for such Limitation Year.

         For purposes of this limitation, all defined benefit plans maintained
by an Employer (or any Affiliates), whether or not terminated, are to be treated
as one defined benefit plan and all defined contribution plans maintained by an
Employer (or any Affiliates), whether or not terminated, are to be treated as
one defined contribution plan. The extent to which the annual benefit under any
defined benefit plans shall be reduced in order to achieve compliance with the
limitations of Code Section 415 shall be determined in such a manner so as to
maximize the aggregate benefits payable to such Participant. If such reduction
is under this Plan, the Committee shall advise affected Participants of any
additional limitation on their annual benefits required by this Section.

         (d) The above limitations in Section 4.6 and this Section 4.7 are
intended to comply with the provisions of Code Section 415 so that the maximum
benefits able to be provided by plans of the Employer shall be exactly equal to
the maximum amounts allowed under Code Section 415. If there is any discrepancy
between the provisions of Section 4.6 or this Section 4.7 and the provisions of
Code Section 415, such discrepancy shall be resolved in such a way as to
give full effect to the provisions of Code Section 415, which provisions are
hereby incorporated by reference.

                                      -30-



<PAGE>

                                    ARTICLE V
                                  DISTRIBUTIONS

5.1      Normal Retirement

         Upon the retirement of a Participant on or after attaining his Normal
Retirement Age, the value of his Individual Account (as determined under Section
5.9) shall become 100% vested and shall become payable as soon as
administratively feasible following his retirement. The Committee shall
thereupon direct the Trustee to distribute to the retiring Participant such
amount in accordance with Section 5.6. 

5.2      Disability Retirement

         (a) A Participant may retire from the employment of the Employer on the
first day of any month coincident with or next following a determination by the
Committee that the Participant has incurred a Total and Permanent Disability.
Upon the retirement of a Participant under this Section 5.2, the value of his
Individual Account (as determined under Section 5.9) shall become 100% vested
and shall become payable as soon as administratively feasible following his
retirement. The Committee shall thereupon direct the Trustee to distribute to
the retiring Participant such amount in accordance with Section 5.6.

         (b) Notwithstanding anything herein to the contrary, a Participant who
retires in accordance with this Section 5.2 shall (1) have the right to delay
receipt of his disability retirement benefit until the time required by Section
5.8(b), and (2) if deferred benefit commencement is elected, have the right at
any time subsequent to his disability retirement date but prior to the time
required by Section 5.8(b) to request benefit commencement at some earlier date.

5.3      Death Before Retirement or Termination of Employment

         (a) Upon the death of a Participant before retirement or termination of
employment, the value of such Participant's Individual Account (as determined
under Section 5.9) shall become 100% vested and shall become payable as soon as
administratively feasible following his death. Subject to subsection (b), the
Committee shall direct the Trustee to distribute to the deceased Participant's
Beneficiary such amount in accordance with Section 5.6. After the death
of the Participant, the Participant's 

                                      -31-
<PAGE>


Beneficiary shall be entitled to select the Investment Options in which the
Individual Account will be invested in accordance with the same rules then
applicable to Participant selection of Investment Options.

         (b) If the Beneficiary is the Participant's surviving spouse and the
value of the Participant's Individual Account exceeds $3,500, then the
Individual Account shall be paid by purchase of an annuity contract providing
for annuity payments for the spouse's lifetime, unless the spouse shall elect in
writing to receive the Individual Account in a lump sum or installments under
Section 5.6(c). Subject to Section 5.8(c), payments under an annuity contract
shall commence at a time designated by the spouse, but in no event earlier than
a date that falls as soon as administratively feasible following the
Participant's date of death.

5.4      Death After Retirement or Termination of Employment

         (a) Upon the death of a Participant who has terminated employment and
who is not receiving benefit payments in accordance with a form of distribution
under Section 5.6, the value of the vested portion of such Participant's
Individual Account (as determined under Section 5.9) shall become payable as
soon as administratively feasible following his death. (For any Participant who
is receiving benefit payments in accordance with a form of distribution under
Section 5.6, the provisions of such form of distribution shall control any
payments upon the death of such Participant.) Subject to subsection (b), the
Committee shall direct the Trustee to distribute to the deceased Participant's
Beneficiary such amount in accordance with Section 5.6. After the death of the
Participant, the Participant's Beneficiary shall be entitled to select the
Investment Options in which the Individual Account will be invested in
accordance with the same rules then applicable to Participant selection of
Investment Options.

         (b) If the Beneficiary is the Participant's surviving spouse and the
value of the vested portion of the Participant's Individual Account exceeds
$3,500, then the Individual Account shall be paid by purchase of an annuity
contract providing for annuity payments for the spouse's lifetime, unless the
spouse shall elect in writing to receive the Individual Account in a lump sum or
installments under Section 5.6(c). Subject to Section 5.8(c), payments under an
annuity contract shall commence at a time designated by the spouse, but in no
event earlier than a date that falls as soon as administratively feasible
following the Participant's date of death.


                                      -32-



<PAGE>





5.5      Termination of Employment

         (a) Upon termination of employment for any reason other than retirement
under Section 5.1 or 5.2, or death, a Participant shall be entitled to the value
of the vested portion of his Individual Account (as determined under Section
5.9) and payable at the time set forth in subsection (b). A Participant shall at
all times be one hundred percent (100%) vested in his Employee Pre-Tax Account,
his Employer Old Matching Account, his Old Discretionary Account and his
Rollover Account. Subject to the next sentence, a Participant shall have a
vested interest in the following percentage of his Employer New Matching Account
and his New Discretionary Account, based upon his Years of Vesting Service:

================================================================================
          Years of Vesting Service                  Vested Interest
- --------------------------------------------------------------------------------
                less than 2                               0%
- --------------------------------------------------------------------------------
                     2                                    25%
- --------------------------------------------------------------------------------
                     3                                    50%
- --------------------------------------------------------------------------------
                 4 or more                               100%
================================================================================


Notwithstanding the preceding sentence, (1) a Participant who had three or more
years of service under this Plan as of June 30, 1995 shall at all times be one
hundred percent (100%) vested in his Employer New Matching Account and his New
Discretionary Account; and (2) a Participant who was formerly a participant in
the Besselaar 401(k) Plan and who had three or more years of service under the
Besselaar 401(k) Plan as of December 31, 1995 shall at all times be one hundred
percent (100%) vested in his Employer New Matching Account.

         (b) (1) As soon as administratively feasible following a Participant's
termination of employment, the Committee shall direct the Trustee to distribute
to such Participant the value of the vested portion of his Individual Account
(as determined under Section 5.9). Notwithstanding the preceding sentence, if
the amount to be distributed under this subsection (b) exceeds (or at the time
of any prior distribution exceeded) $3,500, then no distribution shall be made
prior to the Participant attaining his Normal Retirement Age unless he consents
in writing to the making of such distribution. The 


                                      -33-
<PAGE>

consent of the Participant shall be obtained in writing within the 90-day period
ending on the date distribution commences. The Participant shall be given a
written notice of the right to defer any distribution until the Participant's
Individual Account balance is no longer immediately distributable. Such
notification shall be provided no less than seven days and no more than 90 days
prior to the date distribution commences and shall inform the Participant that
he has a right to a period of at least 30 days after receiving the notice to
consider the decision of whether or not to elect a distribution.

             (2) As soon as administratively feasible following the attainment
of Normal Retirement Age on the part of a Participant who has previously
terminated his employment but the distribution of whose benefit has not
commenced, the Committee shall direct the Trustee to distribute to such
Participant the value of his Individual Account (as determined under Section
5.9) in a lump sum payment.

         (c) If a Participant's employment terminates for any reason other than
retirement or death at a time when he is not fully vested in his Employer New
Matching Account and New Discretionary Account, then the Committee shall follow
the procedure set forth in paragraph (1) or that set forth in paragraph (2)
below, as appropriate:

             (1) If the vested portion of the Participant's Employer New
Matching Account and New Discretionary Account is distributed to him at any time
before the end of the second Plan Year following the Plan Year in which his
employment terminated, the remaining portion of such Accounts shall be forfeited
as of the date of such termination of employment. However, if the Participant
had no vested interest in his Employer New Matching Account and New
Discretionary Account at the time of his termination of employment, the
Committee nonetheless shall treat the Participant as if he had received a
distribution on the date his employment terminated and shall forfeit the
Participant's entire Employer New Matching Account and New Discretionary Account
on the date his employment terminated. If the former Participant returns as an
Employee prior to incurring a five-year Period of Severance beginning
immediately after the date of his distribution (or on the date his employment
terminated in the case of a former Participant who had no vested interest in his
Employer New Matching Account and New Discretionary Account on the date his
employment terminated), and if he repays the full amount of the distribution (if
any) paid to him by reason of his termination of employment no later than
the fifth anniversary of the date of his reemployment, then his 


                                      -34-



<PAGE>






Employer New Matching Account and New Discretionary Account, determined as of
the date of the distribution of his vested interest, shall be fully restored to
him as of the end of the Plan Year in which such repayment occurred. In such
case, the Participant's Employer New Matching Account and New Discretionary
Account shall be restored first out of forfeitures for such Plan Year and, if
such forfeitures are insufficient to restore such Accounts, the Employer shall
make a special contribution to the extent necessary so that the Participant's
Accounts are fully restored.

             (2) If a Participant's vested interest in his Employer New Matching
Account and New Discretionary Account is not distributed to him before the end
of the second Plan Year in which his employment terminated, any portion of such
Accounts which is not vested shall be forfeited after he incurs a five-year
Period of Severance. If a Participant receives a distribution of his Individual
Account before a forfeiture is permitted and at a time when he is not fully
vested in his Employer New Matching Account and New Discretionary Account and is
reemployed as an Employee before incurring a five-year Period of Severance, his
vested interest in each such Account upon his subsequent reemployment shall be
determined by: (A) multiplying the applicable percentage from Section 5.5(a)
hereof by the sum of the value of the Participant's Account and the amount of
the distribution from such Account, and (B) subtracting the amount of the
distribution from the amount determined under (A).

         (d) In the event a Participant who terminated his employment with an
Employer is reemployed as an Employee prior to receiving a distribution of his
Individual Account, he shall not be entitled to a distribution as provided in
this Section 5.5 due to such termination, but shall be entitled to a
distribution as determined herein upon any subsequent termination of employment
for any reason. 

5.6      Method of Payment

         (a) Normal Form

             In the absence of the election of an optional method of payment as
provided in subsection (c), benefit payments hereunder shall be made in a lump
sum. Furthermore, distributions to a Participant (or to his Beneficiary if the
Participant dies before distribution of his benefit has commenced), the value of
the vested portion of whose Individual Account does not exceed (or at the time
of any prior distribution did not exceed) $3,500, automatically shall be made in
a lump sum. Payment from

                                      -35-



<PAGE>


investments held in Employer Stock may be distributed in cash or in stock, at
the direction of the Participant. Payments from other investment accounts shall
be made only in cash.

         (b) Election Procedures

             (1) No less than seven and no more than 90 days before distribution
of a Participant's benefit commences, each Participant and his spouse (if any)
shall be given a written notice to the effect that if the Participant is married
on the date of commencement of payments and has elected an annuity under
subsection (c)(2), (c)(3) or (c)(4), benefits will be payable in the form of a
"qualified joint and survivor annuity" under subsection (d) unless the
Participant, with the consent of his spouse, elects to the contrary prior to the
commencement of payments. The notice shall describe, in a manner intended to be
understood by the Participant and his spouse, the terms and conditions of the
qualified joint and survivor annuity, the financial effect of the election of an
optional form or absence of election, the rights of the Participant to elect an
optional form or to revoke such an election, and the rights of the Participant's
spouse to consent to an election of an optional form. In addition, the notice
shall inform the Participant that he has 30 days to elect whether to have
benefits paid in an optional form.

             (2) During the 90-day period ending on the day his distribution
commences, each Participant whose Individual Account balance exceeds (or at the
time of any prior distribution exceeded) $3,500 may elect to have his benefit
hereunder paid under any one of the options set forth in subsection (c) in lieu
of the normal form provided for in subsection (a).

             (3) A Participant or Beneficiary who desires to have his benefit
hereunder paid under one of the optional methods provided in subsection (c)
shall make such an election by written request to an authorized representative
of the Committee on forms provided by the Committee. An election by a
Participant to receive his retirement benefit under any of the optional methods
of payment as provided in subsection (c) may be revoked by such Participant in
writing to an authorized representative of the Committee at any time and any
number of times during the 90-day period ending on the day his benefit payments
commence. After retirement benefit payments have commenced, no elections or
revocations of an optional method will be permitted under any circumstances.


                                      -36-



<PAGE>



         (c) Available Options

             (1) Monthly, quarterly or annual installments from the Trust Fund
over a period not to exceed the lesser of (A) 10 years, or (B) the life
expectancy of the Participant or the joint life expectancies of the Participant
and his Beneficiary, in either case determined at the time payments commence.
Life expectancies shall be determined when payments commence and shall not
thereafter be recalculated. If a Participant or Beneficiary elects installment
payments, his Individual Account shall be fully invested in the Fidelity Asset
Manager Fund (unless it is already so invested) as soon as practicable following
the election of installment payments, and shall remain fully invested in such
Fund throughout the payment period.

             (2) Subject to subsection (d), an annuity contract, purchased from
an insurance company (or similar source) by the Committee utilizing the value of
the vested portion of the Participant's Individual Account, which provides for
equal monthly payments over the Participant's (or Beneficiary's) lifetime and
which contains such other terms and provisions as may be approved in writing by
such Participant or Beneficiary.

             (3) Subject to subsection (d), an annuity contract, purchased from
an insurance company (or similar source) by the Committee utilizing the value of
the vested portion of the Participant's Individual Account, which provides for
equal monthly payments over the Participant's lifetime and for such monthly
payments (or one-half thereof) to be continued after his death to the
Participant's designated Beneficiary over the lifetime of the Beneficiary. If
the designated Beneficiary is not living at the death of the Participant, no
additional benefit shall be payable hereunder. Such annuity contract shall
contain such other terms and promises as may be approved in writing by the
electing Participant. (This optional method shall not be available to a
Beneficiary.)

             (4) Subject to subsection (d), an annuity contract, purchased from
an insurance company (or similar source) by the Committee utilizing the value of
the vested portion of the Participant's Individual Account, which provides for
equal monthly payments over the Participant's lifetime and in the event of his
death before 120 monthly payments have fallen due, such payments shall be
continued to the Participant's designated Beneficiary until the remainder of the
120 monthly payments have been paid. Such annuity contract shall contain such
other terms and provisions as may be approved

                                      -37-



<PAGE>

in writing by the electing Participant. (This optional method shall not be
available to a Beneficiary.)

         (d) Qualified Joint and Survivor Annuity

         If a Participant is married on the date distribution of his Individual
Account commences, no form of payment described in subsection (c)(2), (c)(3) or
(c)(4) may be elected unless (a) it is the joint and survivor annuity of
subsection (c)(3) with one-half of the Participant's lifetime amount payable
after his death to his surviving spouse (to whom he was married on the date
payments to the Participant first commenced) as his Beneficiary, or (2) the
Participant's spouse consents in writing to the form elected. Such consent shall
acknowledge its effect and be witnessed by a Committee member (or an authorized
representative) or a notary public. Spousal consent is not required if there is
no spouse, the spouse cannot be located or under such other circumstances as may
be prescribed by regulations. Any spousal consent shall only be applicable to
the spouse granting such consent. 

5.7      Benefits to Minors and Incompetents

         (a) In case any person entitled to receive payment under the Plan shall
be a minor, the Committee, in its discretion, may distribute such payment in any
one or more of the following ways:

             (1) By payment thereof directly to such minor;

             (2) By application thereof for the benefit of such minor;

             (3) By payment thereof to either parent of such minor or to any
person who shall be legally qualified and shall be acting as guardian of the
person or the property of such minor, provided the parent or adult person to
whom any amount shall be paid shall have advised the Committee in writing that
he will hold or use such amount for the benefit of such minor.

         (b) In the event a person entitled to receive payment under the Plan is
physically or mentally incapable of personally receiving and giving a valid
receipt for any payment due (unless prior claim therefor shall have been made by
a duly qualified legal representative of such person), such payment in the
discretion of the Committee may be made to the spouse, son, daughter, parent,
brother or sister of the recipient or to any other person who is responsible for
the welfare of such recipient.

                                      -38-
<PAGE>

         (c) Any payments made under subsections (a) or (b) shall, to the extent
of the payments, fully discharge the obligations of the Committee and the Plan
to any other person making a claim hereunder with respect to such payments.

5.8      Payment of Benefits

         (a) Except as provided in subsection (b), in the event a Participant's
Individual Account shall be due and payable under this Article V and the
Participant has not elected otherwise in accordance with the Plan, any payment
of benefits to the Participant shall begin not later than 60 days after the
close of the Plan Year in which occurs the latest of:

             (1) the date on which the Participant attains age 65;

             (2) the 10th anniversary of the date in which the Participant
commenced participation in the Plan; and

             (3) termination of employment of the Participant with the Employer.

         (b) Notwithstanding subsection (a) above, distribution of a
Participant's benefit shall be made no later than April 1 of the calendar year
following the calendar year during which such Participant attains age 70 1/2,
regardless of whether or not he has terminated employment with the Employer.
Such distribution shall be made over a period not extending beyond the life or
life expectancy of the Participant or the joint lives or life expectancies of
the Participant and a designated Beneficiary. Life expectancies shall be
determined at the time payments commence and shall not thereafter be
recalculated.

         (c) If a Participant dies before distribution of his benefit has
commenced, the Participant's entire benefit shall be distributed within five
years after his death. The preceding sentence shall not apply to any portion of
the Participant's benefit if the following requirements in paragraphs (1) and,
if applicable, (2) are met with respect to such portion:

             (1) (A) if the portion of the Participant's benefit is payable to
or for the benefit of a designated Beneficiary;

                 (B) such portion will be distributed over a period not
extending beyond the life expectancy of such Beneficiary at the time payments
commence; and

                 (C) such distributions begin not later than December 31 of the
calendar year following the calendar year of the Participant's death.

                                      -39-
<PAGE>


             (2) If the designated Beneficiary referred to in paragraph (1)(A)
above is the surviving spouse of the Participant, then the date on which the
distributions are required to begin under paragraph (1)(C) shall not be earlier
than December 31 of the calendar year in which the Participant would have
attained age 70 1/2.

                 If the surviving spouse dies before the distributions to such
spouse begin, this Section 5.8(c) (with the exception of paragraph (2)) shall be
applied as if the surviving spouse were the Participant.

                 This Section 5.8(c) shall not apply if the distribution of the
Participant's benefit has commenced prior to his death and the remaining portion
of the Participant's benefit will be distributed at least as rapidly as under
the method of distribution being used at the date of the Participant's death.

                 For purposes of this Section 5.8(c), under regulations to be
prescribed by the Secretary of the Treasury, any amount paid to a child shall be
treated as if it had been paid to the surviving spouse upon such child reaching
the age of majority (or other designated event prescribed under such
regulations).

         (d) Distributions under this Article V shall be made in accordance with
regulations issued by the Secretary of the Treasury under Code Section
401(a)(9), including Treasury Regulation ss.1.401(a)(9)-2, which regulations
shall override any distribution options in this Plan inconsistent with Section
401(a)(9). 

5.9      Valuation of Accounts

         All distributions hereunder shall be based upon the value of the
Participant's Individual Account as determined under this Section 5.9.

         (a) The value of a Participant's Individual Account upon a distribution
hereunder shall be the sum of paragraphs (1)-(10) below, where:

             (1) is the product of (A) the closing Net Asset Value of the
Fidelity Asset Manager Fund: Income on the Valuation Date, and (B) the number of
shares of such fund allocated to the Participant's Individual Account as of such
Valuation Date;

             (2) is the product of (A) the closing Net Asset Value of the
Fidelity Asset Manager Fund on the Valuation Date, and (B) the number of shares
of such fund allocated to the Participant's Individual Account as of such
Valuation Date;

                                      -40-
<PAGE>

             (3) is the product of (A) the closing Net Asset Value of the
Fidelity Asset Manager Fund: Growth on the Valuation Date, and (B) the number of
shares of such fund allocated to the Participant's Individual Account as of such
Valuation Date;

             (4) is the product of (A) the closing Net Asset Value of the
Fidelity Balanced Fund on the Valuation Date, and (B) the number of shares of
such fund allocated to the Participant's Individual Account as of such Valuation
Date;

             (5) is the product of (A) the closing Net Asset Value of the
Fidelity Contrafund on the Valuation Date, and (B) the number of shares of such
fund allocated to the Participant's Individual Account as of such Valuation
Date;

             (6) is the product of (A) the closing Net Asset Value of the
Fidelity Equity-Income Fund on the Valuation Date, and (B) the number of shares
of such fund allocated to the Participant's Individual Account as of such
Valuation Date;

             (7) is the product of (A) the closing Net Asset Value of the
Fidelity International Growth & Income Fund on the Valuation Date, and (B) the
number of shares of such fund allocated to the Participant's Individual Account
as of such Valuation Date;

             (8) is the product of (A) the closing Net Asset Value of the
Fidelity Magellan Fund on the Valuation Date, and (B) the number of shares of
such fund allocated to the Participant's Individual Account as of such Valuation
Date; and

             (9) is the sum of (A) the number of shares of the Fidelity MG42
Managed Income Portfolio allocated to the Participant's Individual Account as of
the last day of the calendar month coincident with or next preceding the
Valuation Date, and (B) interest, if any, credited from the first day of the
calendar month in which falls the Valuation Date to the Valuation Date;

             (10) is the product of (A) the per unit value of the Employer Stock
Fund, the Corning Stock Fund and the CCL Stock Fund on the Valuation Date, and
(B) the number of Unit of such fund allocated to the Participant's Individual
Account as of such Valuation Date.

         (b) If a Discretionary Contribution is made on behalf of a Participant
after the date on which his Individual Account is valued under subsection (a),
the Participant shall receive an additional distribution equal to the amount of
the Discretionary Contribution and any earnings or losses thereon. Such
additional distribution shall be valued in the 

                                      -41-
<PAGE>


same manner as the Participant's Individual Account was valued under subsection
(a), except that the Valuation Date shall be a date that falls as soon as
administratively feasible after the Discretionary Contribution is made. 

5.10     Direct Rollovers

         (a) Notwithstanding any provision of the Plan to the contrary that
would otherwise limit a distributee's election under this Section, a distributee
may elect, at the time and in the manner prescribed by the Committee, to have
any portion of an eligible rollover distribution paid directly to an eligible
retirement plan specified by the distributee in a direct rollover.

         (b) (1) An "eligible rollover distribution" is any distribution of all
or any portion of the balance to the credit of the distributee, except that an
eligible rollover distribution does not include: any distribution that is one of
a series of substantially equal periodic payments (not less frequently than
annually) made for the life (or life expectancy) of the distributee or the joint
lives (or joint life expectancies) of the distributee and the distributee's
designated beneficiary, or for a specified period of ten years or more; any
distribution to the extent such distribution is required under Section 401(a)(9)
of the Code; and the portion of any distribution that is not includible in gross
income (determined without regard to the exclusion for net unrealized
appreciation with respect to employer securities).

             (2) An "eligible retirement plan" is an individual retirement
account described in section 408(a) of the Code, an individual retirement
annuity described in section 408(b) of the Code, an annuity plan described in
section 403(a) of the Code, or a qualified defined contribution plan described
in section 401(a) of the Code, that accepts the distributee's eligible rollover
distribution. However, in the case of an eligible rollover distribution to the
surviving spouse, an eligible retirement plan is an individual retirement
account or individual retirement annuity.

             (3) A "distributee" includes an employee or former employee. In
addition, the employee's or former employee's surviving spouse and the
employee's or former employee's spouse or former spouse who is the alternate
payee under a qualified domestic relations order, as defined in Section 414(p)
of the Code, are distributees with regard to the interest of the spouse or
former spouse.

                                      -42-
<PAGE>

             (4) A "direct rollover" is a payment by the Plan to the eligible
retirement plan specified by the distributee.

5.11     Payment to Alternate Payee Under QDRO

         Notwithstanding any other provision of this Plan, once the Committee
determines that a domestic relations order is a qualified domestic relations
order ("QDRO") within the meaning of Section 206(d)(3) of ERISA, unless the QDRO
specifically provides otherwise, the Committee shall direct the Trustee to
distribute, as soon as administratively feasible following the date on which the
Committee determines that the domestic relations order is a QDRO, to the
alternate payee named in the QDRO the benefit provided therein in a lump sum.

                                      -43-



<PAGE>

                                   ARTICLE VI
                              LOANS AND WITHDRAWALS

6.1      Loans to Participants

         The Committee, upon the request of a Participant, may at its discretion
make loans from the Trust Fund to Participants who are "parties in interest" as
defined in ERISA Section 3(14).  The following additional rules shall apply:

         (a) Prior to January 1, 1996, a Participant may only make a loan under
this Section 6.1 if the loan is made on account of an immediate and heavy
financial need of the Participant, as determined under subsection (b), and is
necessary to satisfy the financial need. The determination of the existence of
financial hardship and the amount necessary to be loaned to satisfy the
immediate financial need created by the hardship shall be made by the Committee
in a uniform and nondiscriminatory manner. A Participant requesting a loan
hereunder may be required to submit whatever documentation the Committee, in its
sole discretion, deems necessary to establish the existence of financial
hardship and the amount necessary to be loaned to satisfy the financial need
created by the hardship.

         (b) A loan will be considered to be made on account of an immediate and
heavy financial need of the Participant for purposes of subsection (a) only if
it is on account of:

             (1) Expenses for medical care described in Code Section 213(d)
previously incurred by the Participant, the Participant's spouse, or any
dependents of the Participant (as defined in Code Section 152), or necessary for
such persons to obtain medical care described in Code Section 213(d);

             (2) Purchase (excluding mortgage payments) of a principal residence
for the Participant;

             (3) Payment of tuition and other related expenses, including room
and board, billed directly by the institution for post-secondary education for
the Participant, his spouse, children, or dependents;

             (4) The need to prevent the eviction of the Participant from his
principal residence or foreclosure on the mortgage of the Participant's
principal residence;


                                      -44-



<PAGE>




             (5) Expenses incurred in refinancing a principal residence of the
Participant; or

             (6) Capital renovations of the Participant's principal residence
performed under contract by a third party.

         (c) A Participant may only have one loan outstanding at any time. The
minimum new loan amount shall be $1,000. If a Participant's Individual Account
balance is insufficient to support the minimum loan amount loan because of the
maximum loan restrictions set forth below, no loan shall be made. The maximum
amount of any loan, when added to the outstanding balance of any existing loan
from this Plan, shall be the lesser of (1) and (2):

             (1) $50,000 reduced by the excess of the highest outstanding
balance of loans from the Plan during the one-year period ending on the day
before the date the loan is made over the outstanding balance of loans from the
Plan on the date the loan is made.

             (2) One-half of the value of the vested portion of the
Participant's Individual Account on the date the loan is made.

         (d) All loans shall be repayable over a period of not more than five
years, except that a loan used by the Participant to acquire any dwelling unit
which within a reasonable time is to be used (determined at the time the loan is
made) as a principal residence of the Participant shall be repayable over a
period of not more than 10 years.

         (e) Each loan shall be secured by one-half of the value of the vested
portion of the Participant's Individual Account balance; shall bear interest at
a rate of one percent (1%) above the Prime Rate in effect on the last day of the
calendar quarter coincident with or next preceding the calendar quarter in which
the loan is applied for; shall be repaid by payroll deduction each pay period in
accordance with a reasonable repayment schedule requiring substantially level
payments of principal and interest; and shall be evidenced by a written
promissory note setting forth the terms of the loan. A Participant may prepay
the entire outstanding loan balance without penalty. To the extent a
Participant's pay from the Employer is insufficient to make the payments due
under a loan, but such Participant is not covered by the provisions of
subsection (f), such Participant shall make his loan payments out of his own
personal funds.


                                      -45-



<PAGE>

         (f) In the event of the death or termination of employment of a
Participant, the unpaid balance of any outstanding loan to such Participant,
together with accrued interest, shall be deducted from the amount otherwise due
him or his Beneficiary, notwithstanding the provisions of Section 12.5.

         (g) The Committee shall apply the provisions of this Section in a
uniform and nondiscriminatory manner which is not inconsistent with Department
of Labor regulations at 29 C.F.R. ss.2550.408b-1.

         (h) Each loan shall be considered a separate investment option of the
Individual Account of the Participant. Notwithstanding Section 4.1(c), when a
loan is made, the amount of the loan shall be withdrawn from sub-accounts within
the Participant Individual Account among the separate Investment Options in
which each sub-account is invested and transferred to a segregated loan account
maintained in his name. The loan amount shall be withdrawn from the sub-accounts
within the Individual Account in the following order: (1) Old Discretionary
Account; (2) the vested portion of the New Discretionary Account; (3) Employer
Old Matching Account; (4) the vested portion of the Employer New Matching
Account; (5) Rollover Account; and (6) Employee Pre-Tax Account. Within each
sub-account, the loan amount shall be withdrawn from the separate Investment
Options in the following order: (1) Fidelity Managed Income Portfolio; (2)
Fidelity Balanced Fund; (3) Fidelity Equity-Income Fund; (4) Fidelity Asset
Manager Fund: Income; (5) Fidelity Asset Manager Fund; (6) Fidelity Asset
Manager Fund: Growth; (7) Fidelity Contrafund; (8) Fidelity Magellan Fund; (9)
Fidelity International Growth & Income Fund; (10) CCL Stock Fund; (11) Corning
Stock Fund; and (12) Employer Stock Fund. Payments of principal and interest
against a loan shall thereafter be allocated ratably among the sub-accounts from
which the loan was withdrawn and invested in accordance with a Participant's
outstanding Investment Option specification, except with regard to the Employer
Matching Account allocable to Employer Stock under Section 3.2.

         (i) There may be an administrative charge imposed on each new loan in
an amount determined by the Committee.

         (j) In the event a Participant defaults on a loan from this Plan, the
Plan shall foreclose on so much of the Participant's Individual Account as is
given as collateral for


                                      -46-
<PAGE>


the loan when such amounts are otherwise available for distribution under the
terms of the Plan.

6.2      Hardship Withdrawals

         (a) Upon request of the Participant, and with the approval of the
Committee, a Participant shall be allowed to withdraw all or part of the value
of his Individual Account which is available under subsection (e) while still
employed by the Employer. Withdrawn amounts may not be repaid to the Trust Fund.
Withdrawals shall be charged first against the Participant's Rollover Account,
then against his Employee Pre-Tax Account, then against his Employer Old
Matching Account, then against the vested portion of his Employer New Matching
Account, then against his Old Discretionary Account, and finally against the
vested portion of his New Discretionary Account. Within such Accounts,
withdrawals shall be charged against the separate Investment Options in the
following order: (1) Fidelity Managed Income Portfolio; (2) Fidelity Balanced
Fund; (3) Fidelity Equity-Income Fund; (4) Fidelity Asset Manager Fund: Income;
(5) Fidelity Asset Manager Fund; (6) Fidelity Asset Manager Fund: Growth; (7)
Fidelity Contrafund; (8) Fidelity Magellan Fund; (9) Fidelity International
Growth & Income Fund; (10) CCL Stock Fund; (11) the Corning Stock Fund; and (12)
Employer Stock Fund.

         (b) A Participant may only make a withdrawal under this Section 6.2 if
the withdrawal is made on account of an immediate and heavy financial need of
the Participant, as determined under subsection (c)(1), and is necessary to
satisfy the financial need, as determined under subsection (c)(2). The
determination of the existence of financial hardship and the amount necessary to
be withdrawn to satisfy the immediate financial need created by the hardship
shall be made by the Committee in a uniform and nondiscriminatory manner, in
accordance with the standards and restrictions set forth in subsection (c)
below. A Participant requesting a withdrawal hereunder may be required to submit
whatever documentation the Committee, in its sole discretion, deems necessary to
establish the existence of financial hardship and the amount necessary to be
withdrawn to satisfy the financial need created by the hardship.

         (c) (1) Immediate and heavy financial need. A withdrawal will be
considered to be made on account of an immediate and heavy financial need of the
Participant for purposes of subsection (b) only if it is on account of:

                                      -47-
<PAGE>

                 (A) Expenses for medical care described in Code Section 213(d)
previously incurred by the Participant, the Participant's spouse, or any
dependents of the Participant (as defined in Code Section 152) or necessary for
such persons to obtain medical care described in Code Section 213(d);

                 (B) Purchase (excluding mortgage payments) of a principal
residence for the Participant;

                 (C) Payment of tuition for the next 12 months of post-secondary
education for the Participant, his spouse, children, or dependents;

                 (D) The need to prevent the eviction of the Participant from
his principal residence or foreclosure on the mortgage of the Participant's
principal residence; or

                 (E) For any other reason which the Commissioner of Internal
Revenue deems to constitute such an immediate and heavy financial need in
accordance with Treasury Regulation ss.1.401(k)-1(d)(2)(iv)(C).

             (2) Amount necessary to satisfy the need. A withdrawal will be
considered to be in an amount necessary to satisfy a Participant's need under
paragraph (1) for purposes of subsection (b) only if:

                 (A) It does not exceed the amount of the need under paragraph
(1);

                 (B) If the Participant's withdrawal is charged against any
portion of his Employee Pre-Tax Account, the Participant has obtained all
non-hardship distributions and non-taxable loans he is eligible for and is able
to provide collateral for under any plan the Employer may sponsor (including
this Plan);

                 (C) If the Participant's withdrawal is charged against any
portion of his Employee Pre-Tax Account, the Participant may not make any
Employee Pre-Tax Contributions under Section 3.1 for a period of 12 months after
his withdrawal, nor may he make any other elective contributions to any Employer
plan as described in Treasury Regulation ss.1.401(k)-1(d)(2)(iv)(B)(4) (but
shall still be otherwise considered an Eligible Employee during such
suspension); and

                 (D) If the Participant's withdrawal is charged against any
portion of his Employee Pre-Tax Account, the Participant's maximum annual
Employee Pre-Tax Contributions under Section 3.1(c) for the calendar year
following the calendar year in

                                     -48-
<PAGE>

which he receives his withdrawal are reduced by the amount of Employee
Pre-Tax Contributions he made in the calendar year in which he receives his
withdrawal.

                 Notwithstanding subparagraphs (A) through (D), a Participant's
withdrawal may be considered to be in an amount necessary to satisfy a need
under paragraph (1) if it satisfies a method prescribed by the Commissioner of
Internal Revenue under Treasury Regulation ss.1.401(k)-1(d)(2)(iv)(C).

         (d) In addition to the amount necessary to meet the immediate financial
need created by the hardship, the Participant may, at his election, also
withdraw any amount necessary to cover withholding for federal income tax
purposes.

         (e) A Participant's hardship withdrawal under this Section 6.2 shall be
limited to the aggregate of all his Employee Pre-Tax Contributions made prior to
the withdrawal (excluding earnings thereon allocated to his Employee Pre-Tax
Account as of a date after December 31, 1988), reduced by the amount of any
prior withdrawal of such Contributions, plus the value of his Rollover Account,
the value of his Employer Old Matching Account, the value of the vested portion
of his Employer New Matching Account, the value of his Old Discretionary
Account, and finally the value of the vested portion of his New Discretionary
Account.

6.3      Other Withdrawals

         In addition to the withdrawals available under Section 6.2, a
Participant who was formerly a participant in the Besselaar 401(k) Plan shall be
allowed to withdraw all or part of the value of his Individual Account (pursuant
to the hierarchy set forth in Section 6.2(a)) upon the attainment of age 59 1/2.

                                      -49-



<PAGE>

                                   ARTICLE VII
                                 TRUST FUND/ESOP

7.1      Contributions

         Contributions by the Employer and Participants as provided for in
Article III shall be paid over to the Trustee. All Contributions by the Employer
shall be irrevocable, except as otherwise provided in this Plan and may be used
only for the exclusive benefit of the Participants and their Beneficiaries. The
Employer's Contribution will be made either in cash or in Employee Stock, or
partially in each. Any Employer Stock comprising a portion of the Employer
Matching Contribution shall be valued at the fair-market value thereof at the
date or dates on which any contribution in that form is made 

7.2      Trustee

         The Corporation will maintain an agreement with the Trustee whereunder
the Trustee will receive, invest and administer as a trust fund Contributions
made under this Plan in accordance with the Trust Agreement.

         Such Trust Agreement is incorporated by reference as a part of the
Plan, and the rights of all persons entitled to benefits hereunder are subject
to the terms of the Trust Agreement. The Trust Agreement specifically provides,
among other things, for the investment and reinvestment of the Fund and the
income thereof, the management of the Fund, the responsibilities and obligations
of the Trustee, removal of the Trustee and appointment of a successor,
accounting by the Trustee and the disbursement of the Fund.

         Subject to a Participant's Investment Option specification, the Trustee
shall, in accordance with the terms of such Trust Agreement, accept and receive
all sums of money paid to it from time to time by the Employer, and shall hold,
invest, reinvest, manage and administer such moneys and the increment, increase,
earnings and income thereof as a trust fund for the exclusive benefit of the
Participants and their Beneficiaries and for the payment of reasonable expenses
of administering the Plan.

7.3      Employer Stock Fund

         The Employer Stock Fund shall be invested in the common stock of the
Employer, provided such stock qualifies as qualifying employer securities within
the meaning of ERISA Section 407(d)(5). The level of Plan assets invested in
such fund shall be 
                                      -50-
<PAGE>


determined by Participant Investment Option specifications, and may consist of
up to 100% of all Plan assets.

         (a) Employer Stock Fund. Employer Stock received by the Plan as a
dividend with respect to Corning Stock in connection with the spinoff of the
Employer shall remain invested as Employer Stock. Following the Distribution
Date, consistent with the stated purposes of the Plan, and subject to the
provisions of Section 7.4, the Trustee shall invest that portion of the assets
of the Plan consisting of the Employer Matching Contribution in Employer Stock
to the end that, in the largest measure possible, Participants may share in the
earnings of the Employer and acquire a proprietary interest in the Employer;
provided, however that all Employer Matching Contributions shall be used to make
payments on Exempt Loans to the extent provided in Section A-7. The Trustee will
also invest any other assets attributable to Participants' Individual Accounts
in Employer Stock in accordance with Participants' elections under subsection
2.4 and will invest amounts invested in Corning Stock and CCL Stock in Employer
Stock in accordance with Section 7.4. Any Employer Stock acquired and held in
accordance with this Section will be known and referred to as the "Employer
Stock Fund".

         (b) ESOP Stock. The portion of the Employer Matching Account (including
amounts attributable to ESOP Loans) invested in Employer Stock shall be held and
invested in the "ESOP Stock Fund," which may be a subaccount of the Employer
Stock Fund. 

         (c) ESOP Stock Transfers by Participants. Except for transfers from a
Participant's investments in Corning Stock or CCL Stock (for conversion of
Corning Stock to Employer Stock within a Participant's Individual Account)
pursuant to Section 7.4) transfers may not be made to or from a Participant's
Matching Contribution Account invested in the Employer Stock Fund.


                                      -51-



<PAGE>


7.4      Corning Stock Fund and CCL Stock Fund

         Corning Stock and CCL Stock received by the Plan as a result of the
spinoff of the Company shall be invested in the "Corning Stock Fund" and the
"CCL Stock Fund", respectively. Subject to the following proviso, Corning Stock
held in the Corning Stock Fund and CCL Stock held in the CCL Stock Fund and
allocated to a Participant's Individual Account shall be invested in Investment
Options as directed by the Participant in accordance with Section 2.4
Notwithstanding the foregoing, on December 31, 1997 or one year from the
Distribution Date, if later, any Corning Stock and CCL Stock remaining in the
Corning Stock Fund or CCL Stock Fund shall be applied to the purchase of
Employer Stock which shall be held in the Employer Stock Fund and allocated to
Participants' respective accounts.


7.5      Dividends on ESOP Stock Attributable to Exempt Loan

         It is anticipated that all dividends payable with respect to shares of
ESOP Stock held in the Suspense Account shall be used for the purpose of
repaying one or more Exempt Loans and will not be allocated to Participants'
Employer Matching Accounts invested in Employer Stock and that all dividends
payable with respect to all other Employer Stock held in the Trust Fund shall be
added to the Participants' Employer Stock Fund, subject to Section A-6.
Nevertheless, the Committee may, in its sole discretion, determine for any Plan
Year that dividends payable with respect to shares of ESOP Stock shall, if
payable in cash (I) paid currently to Participants or (ii) used for the purpose
of repaying one or more Exempt Loans if such use of said dividends so applied
meets the requirements of Code Section 404(k). Such discretion herein granted
may be exercised by the Committee independently, and in whole or in part, with
respect to the stock held from time to time in one or more of Employer Stock
Funds established under the Trust. Discretion so exercised for any Plan Year, or
for any portion thereof, may be changed by the Committee at any subsequent time.
Cash dividends which are to be paid to the Participants may be paid directly by
the Company or may be paid by the Trustee within ninety (90) days after the end
of the Plan year or receipt by the Trustee.

                                      -52-
<PAGE>

7.6      Voting and Tender Offer Rights on Employer Stock

         Each Participant shall have the right to vote all shares of Employer
Stock held in the Participant's accounts. Each Participant shall also have the
right to direct the Trustee whether to tender such shares of Stock in the event
an offer is made by any person other than the Employer to purchase such shares.
The Committee shall make any such arrangements with the Trustee as may be
appropriate to pass such voting or tender offer rights through to a Participant.
In the event a Participant fails to vote his shares or fails to indicate his
preference with respect to a tender offer, the Trustee shall vote the
Participant's shares or tender his shares in the same proportions as those Plan
Participants who did respond cast their votes or tendered their shares. The
Trustee shall also vote and exercise any tender offer rights with respect to
unallocated ESOP Stock held in a suspense account in the same proportions as
those Plan Participants who responded cast their votes or tendered their shares.

                                      -53-



<PAGE>

                                  ARTICLE VIII
                                   FIDUCIARIES

8.1      General

         Each Fiduciary who is allocated specific duties or responsibilities
under the Plan or any Fiduciary who assumes such a position with the Plan shall
discharge his duties solely in the interest of the Participants and
Beneficiaries and for the exclusive purpose of providing such benefits as
stipulated herein to such Participants and Beneficiaries, or of defraying
reasonable expenses of administering the Plan. Each Fiduciary in carrying out
such duties and responsibilities shall act with the care, skill, prudence, and
diligence under the circumstances then prevailing that a prudent person acting
in a like capacity and familiar with such matters would use in exercising such
authority or duties.

         A Fiduciary may serve in more than one Fiduciary capacity and may
employ one or more persons to render advice with regard to his Fiduciary
responsibilities. If the Fiduciary is serving as such without compensation, all
expenses reasonably incurred by such Fiduciary shall be reimbursed by the
Employer or, at the Corporation's direction, from the assets of the Trust.

         A Fiduciary may allocate any of his responsibilities for the operation
and administration of the Plan. In limitation of this right, a Fiduciary may not
allocate any responsibilities as contained herein relating to the management or
control of the Fund except (1) through the employment of an investment manager
as provided in Section 8.3 and in the Trust Agreement relating to the Fund, or
(2) to the extent Participants specify their own Investment Options. 

8.2      Corporation

         The Corporation established and maintains the Plan for the benefit of
its Employees and those of participating Employers and of necessity retains
control of the operation and administration of the Plan. The Corporation is the
Plan administrator within the meaning of ERAS Section 3(16)(A). The Corporation
in accordance with specific provisions of the Plan has, as herein indicated,
delegated certain of these rights and obligations to the Employer, the Trustee
and the Committee and these parties shall be solely responsible for these, and
only these, delegated rights and obligations.


                                      -54-



<PAGE>





8.3      Employer

         The Employer shall indemnify each member of the Board of Directors, the
Committee, and any of its employees to whom any fiduciary responsibility with
respect to the Plan is allocated or delegated, from and against any and all
liabilities, costs and expenses incurred by such persons as a result of any act
or omission to act in connection with the performance of their fiduciary duties,
responsibilities and obligations under the Plan and under ERAS, except for
liabilities and claims arising from such fiduciary's willful misconduct or gross
negligence. For such purpose, the Employer may obtain, pay for and keep current
a policy or policies of insurance. Where such policy or policies of insurance
are purchased, there shall be no right to indemnification under this Section
8.3, except to the extent of any deductible amount under the policy or policies
or with regard to covered claims in excess of the insured amount. No Plan assets
may be used for any indemnification.

         The Employer shall supply such full and timely information for all
matters relating to the Plan as (a) the Committee, (b) the Trustee, and (c) the
accountant engaged on behalf of the Plan by the Corporation may require for the
effective discharge of their respective duties. 

8.4      Trustee

         The Trustee, in accordance with the Trust Agreement, shall have
authority to manage the Fund, except that (1) the Committee may in its
discretion employ at any time and from time to time an investment manager (as
defined in section 3(38) of ERAS) to direct the Trustee with respect to all or a
designated portion of the assets comprising the Fund, and (2) Participants may
specify their own Investment Options.

         Each Participant in the Plan shall be a "named fiduciary" within the
meaning of section 402 of the Employee Retirement Income Security Act of 1974,
as amended ("ERAS"), to the extent that Employer Stock or shares of Corning or
JCL, whether or not allocated to his accounts, are voted or tendered according
to the Participant's directions 

8.5      Committee

         The Board shall appoint a Benefits Administration Committee of not less
than three persons to hold office during the pleasure of the Corporation. No
compensation shall be paid members of the Committee from the Fund for service on
such Committee.


                                      -55-



<PAGE>



         The Committee shall choose from among its members a chairman and a
secretary. Any action of the Committee shall be determined by the vote of a
majority of its members. Either the chairman or the secretary may execute any
certificate or other written direction on behalf of the Committee.

         The Committee shall hold meetings upon such notice, at such place or
places and at such time or times as the Committee may from time to time
determine. Meetings may be called by the chairman or any two members. A majority
of the members of the Committee at the time in office shall constitute a quorum
for the transaction of business. The Committee may also act by written consent
in lieu of a meeting.

         A Committee member may resign at any time by giving written notice of
his resignation to the Corporation at least thirty days in advance, unless the
Corporation shall accept shorter notice. The Corporation shall appoint
replacement Committee members. Any Committee member who was employed by the
Employer when appointed to the Committee shall automatically be deemed to have
resigned from the Committee effective as of the date he ceases to be employed by
the Employer, unless the Corporation shall affirmatively act to keep said member
on the Committee.

         Nothing herein shall prevent a Committee member from being a
Participant, or from acting on Plan matters which affect himself by virtue of
affecting all Participants generally. However, a Committee member shall not act
on any matter which affects himself specially. If application of the preceding
sentence results in there not being a quorum to act on any matter, the
Corporation shall appoint the necessary number of temporary Committee members to
take the action.

         In accordance with the provisions hereof, the Committee has been
delegated certain administrative functions relating to the Plan with all powers
necessary to enable it properly to carry out such duties.

         The Committee shall have discretionary authority to construe the Plan,
and to determine, consistent with the terms of the Plan, all questions that may
arise thereunder relating to (a) the eligibility of individuals to participate
in the Plan, (b) the amount of benefits to which any Participant or Beneficiary
may become entitled thereunder, and (c) any situation not specifically
covered by the provisions of the Plan. The determination of the Committee shall
be final and binding on all interested parties. All disbursements by the
Trustee, except for the ordinary expenses of administration of the Fund or the

                                      -56-

<PAGE>


reimbursement of reasonable expenses at the direction of the Corporation as
provided herein, shall be made upon, and in accordance with, the written
directions of the Committee. When the Committee is required in the performance
of its duties hereunder to administer or construe, or to reach a determination
under any of the provisions of the Plan, it shall do so on a uniform, equitable
and nondiscriminatory basis. 

8.6      Claims for Benefits

         All claims for benefits under the Plan shall be submitted to the
Committee which shall have the responsibility for determining the eligibility of
any Participant or Beneficiary for benefits. All claims for benefits shall be
made in writing and shall set forth the facts which such Participant or
Beneficiary believes to be sufficient to entitle him to the benefit claimed. The
Committee may adopt forms for the submission of claims for benefits in which
case all claims for benefits shall be filed on such forms. The Committee shall
provide Participants and Beneficiaries with all such forms.

         Upon receipt by the Committee of a claim for benefits, it shall
determine all facts which are necessary to establish the right of an applicant
to benefits under the provisions of the Plan and the amount thereof as herein
provided. The applicant shall be notified in writing by the Committee of its
decision with respect to such applicant's claim within 90 days after the receipt
of written request for benefits.

         If any claim for benefits is denied, the notice shall be written in a
manner calculated to be understood by the applicant and shall include:

         (a) The specific reason or reasons for the denial;

         (b) Specific references to the pertinent Plan provisions on which the
denial is based;

         (c) A description of any additional material or information necessary
for the applicant to perfect the claim and an explanation why such material or
information is necessary; and

         (d) An explanation of the Plan's claim review procedures. If special
circumstances require an extension of time for processing the initial claim, a
written notice of the extension and the reason therefor shall be furnished to
the claimant by the Committee before the end of the initial 90-day period. In no
event shall such extension exceed 180 days after the receipt of the initial
claim for benefits.


                                      -57-



<PAGE>



8.7      Denial of Benefits - Review Procedure

         In the event a claim for benefits is denied or if the applicant has had
no response to such claim within 90 days of its submission (in which case the
claim for benefits shall be deemed to have been denied), the applicant or his
duly authorized representative, at the applicant's sole expense, may appeal the
denial by filing a written request for review with the Committee within 60 days
of the receipt of written notice of denial or 60 days from the date such claim
is deemed to be denied. In pursuing such appeal the applicant or his duly
authorized representative may review pertinent Plan documents, and may submit
issues and comments in writing.

         The decision on review shall be made by the Committee within 60 days of
receipt of the request for review, unless special circumstances require an
extension of time for processing, in which case a decision shall be rendered as
soon as possible, but not later than 120 days after receipt of a request for
review. If such an extension of time is required, written notice of the
extension shall be furnished to the claimant before the end of the original 60
day period. The decision on review shall be in writing, shall be written in a
manner calculated to be understood by the claimant, and shall include specific
references to the provisions of the Plan on which such denial is based. If the
decision on review is not furnished within the time specified above, the claim
shall be deemed denied on review. The decision of the Committee upon review will
be final and binding on all parties. 

8.8      Records

         All acts and determinations of the Committee shall be duly recorded by
the secretary thereof and all such records, together with such other documents
as may be necessary in exercising its duties under the Plan shall be preserved
in the custody of such secretary. Such records and documents shall at all times
be open for inspection and for the purpose of making copies by any person
designated by the Corporation. The Committee shall provide such timely
information, resulting from the application of its responsibilities under the
Plan, as needed by the Trustee and the accountant engaged on behalf of the Plan
by the Corporation, for the effective discharge of their respective duties.


                                      -58-



<PAGE>



8.9      Missing Persons

         The Committee shall make a reasonable effort to locate all persons
entitled to benefits under the Plan. If such a person cannot be located, the
amount to which such a person otherwise would be entitled shall be retained by
the Trustee and treated in all respects as assets of the Trust, pending
disposition of such amount in accordance with regulations promulgated by the
Secretary of Labor or the Secretary of the Treasury. The Trustee may deposit any
such amounts into an "escheat fund" maintained by such Trustee but not within
the Trust.








                                      -59-



<PAGE>



                                   ARTICLE IX
                      AMENDMENT AND TERMINATION OF THE PLAN

9.1      Amendment of the Plan

         The Corporation shall have the right at any time by action of the Board
to amend the Plan in whole or in part, including retroactively to the extent
necessary. The duties, powers and liability of the Trustee hereunder shall not
be increased without its written consent. The amount of benefits which at the
later of the adoption or effective date of such amendment shall have accrued for
any Participant or Beneficiary hereunder shall not be adversely affected
thereby. No such amendment shall have the effect of revesting in the Employer
any part of the principal or income of the Fund. No amendment may eliminate or
reduce any early retirement benefit or subsidy that continues after retirement
or optional form of benefit. Unless expressly provided for in an amendment, it
shall not affect the rights and obligations of any Participant who terminated
employment prior to the effective date of the amendment. 

9.2      Termination of the Plan

         The Corporation expects to continue the Plan indefinitely, but
continuance is not assumed as a contractual obligation and each Employer
reserves the right at any time by action of its board of directors to terminate
the Plan as applicable to itself. If an Employer terminates or partially
terminates the Plan or permanently discontinues its Contributions at any time,
each Participant affected thereby shall be then fully vested in his Individual
Account.

         In the event of termination of the Plan by an Employer, the Committee
shall value the Fund as of the date of termination. That portion of the Fund
applicable to any Employer for which the Plan has not been terminated shall be
unaffected. The Individual Accounts of the Participants and Beneficiaries
affected by the termination, as determined by the Committee, shall continue to
be administered as a part of the Fund or distributed to such Participants or
Beneficiaries pursuant to Section 5.6 as the Committee, in its sole discretion,
shall determine. Any distributions upon plan termination of amounts attributable
to Employee Pre-Tax Contributions shall only be made to the extent permissible
by Code Section 401(k)(10).

                                      -60-



<PAGE>

                                    ARTICLE X
                PROVISIONS RELATIVE TO EMPLOYERS INCLUDED IN PLAN

10.1     Method of Participation

         Any organization which is affiliated with the Corporation may with the
consent of the Board adopt the Plan. In order to adopt the Plan, appropriate
action is required by the board of directors (or other governing body) of the
adopting organization and by the Board. Any organization which becomes a party
to the Plan shall thereafter promptly deliver to the Trustee provided for in
Article VII hereof a certified copy of the resolutions or other documents
evidencing its adoption of the Plan or a similar plan and also a written
instrument showing the Board's approval of such organization's becoming a party
to the Plan. 

10.2     Withdrawal

         Any one or more of the Employers included in the Plan may withdraw from
the Plan at any time by giving six months advance notice in writing to the Board
and the Committee (unless a shorter notice shall be agreed to by the Board) of
its or their intention to withdraw. Upon receipt of notice of any such
withdrawal, the Committee shall certify to the Trustee the equitable share of
such withdrawing Employer in the Fund (to be determined by the Committee).

         The Trustee shall thereupon set aside from the Fund then held by it
such securities and other property as it shall, in its sole discretion, deem to
be equal in value to such equitable share. If the Plan is to be terminated with
respect to such Employer, the amount set aside shall be dealt with in accordance
with the provisions of Section 9.2. If the Plan is not to be terminated with
respect to such Employer, the Trustee shall pay such amount to such trustee as
may be designated by such withdrawing Employer, and such securities and other
property shall thereafter be held and invested as a separate trust of the
Employer which has so withdrawn, and shall be used and applied according to the
terms of a new agreement and declaration of trust between the Employer so
withdrawing and the trustee so designated.

         Neither the segregation of the Fund assets upon the withdrawal of an
Employer, nor the execution of any new agreement and declaration of trust
pursuant to any of the 


                                      -61-
<PAGE>

provisions of this Section 10.2, shall operate to permit any part of the corpus
or income of the Fund to be used for or diverted to purposes other than for the
exclusive benefit of Participants and Beneficiaries or to defray reasonable
costs of administering the Plan and Trust.

10.3     Adoption of ESOP by Participating Employer 

         Any Employer joining the Plan which is not 100 percent owned by the
Employer must expressly provide in said joiner agreement whether the leveraging
provisions of the ESOP are being adopted by such participating Employer. If the
leveraged ESOP is not so adopted, said participating Employer shall participate
in the ESOP provisions of this Plan as may be modified in said joiner agreement,
but all specific provisions applicable to Exempt Loans and the suspense account
established pursuant to the loan shall not apply. If the ESOP provisions of the
Plan are adopted by such a non-100 percent owned participating Employer, any
Exempt Loan applicable to said participating Employer and its Participants shall
be solely the obligation of said participating Employer, and not the Employer or
any other participating Employer under the Plan, and separate accounting shall
be maintained on behalf of said participating Employer and its Participants with
only Participants employed by said participating Employer entitled to
allocations from the fund maintained for said participating Employer's Exempt
Loan. The foregoing provisions governing separate Exempt Loans and separate
groups of Employees of non-100 percent owned participating Employers shall
similarly apply to an Exempt Loan of the Employer and its 100 percent owned
Participating Employers which join the Plan, and their respective Participants,
but for this purpose a 100 percent owned participating employer may, if so
provided in its joinder agreement, join in the Employer's Exempt Loan and in
such case all participating Employer contributions by the Employer and said
Participating Employers and all accounting for shares released from the suspense
account shall be combined for Participants employed by the Employer and each
such participating Employer.

                                      -62-



<PAGE>

                                   ARTICLE XI
                              TOP-HEAVY PROVISIONS

11.1     Determination of Top-Heavy

         (a) (1) The Plan will be considered a Top-Heavy Plan for any Plan Year
if as of the Determination Date (A) the value of the Individual Accounts of
Participants who are Key Employees as of such Determination Date exceeds 60% of
the value of the Individual Accounts of all Participants determined as of such
Determination Date, excluding former Key Employees (the "60% Test") or (B) the
Plan is part of a Required Aggregation Group which is Top-Heavy. Notwithstanding
the results of the 60% Test, the Plan shall not be considered a Top-Heavy Plan
for any Plan Year in which the Plan is a part of a Required or Permissive
Aggregation Group which is not Top-Heavy.

             (2) For purposes of the 60% Test,

                 (A) all distributions made from Individual Accounts within the
five-year period ending on the Determination Date shall be taken into account;

                 (B) if any Participant is a non-Key Employee with respect to
the Plan for any Plan Year, but such Participant was a Key Employee with respect
to the Plan for any prior Plan Year, the Individual Account of such Participant
shall not be considered; and

                 (C) If a Participant has not performed any service for the
Employer or any Affiliate which maintains the Plan at any time during the
five-year period ending on the Determination Date, the Individual Account of
such Participant shall not be considered.

         (b) Minimum Allocations: Notwithstanding Sections 4.3 and 4.4, for any
Plan Year during which the Plan is a Top-Heavy Plan, the rate of Employer
Matching Contributions and Discretionary Contributions for such Plan Year
allocated to the Individual Accounts of Participants who are non-Key Employees
and who remain employed by the Employer (or any Affiliate) at the end of the
Plan Year (regardless of any such Participant's hours of service or level of
compensation during the Plan Year) shall be not less than the lesser of:


                                      -63-
<PAGE>

             (1) three percent (3%) of such non-Key Employee Participant's
Section 415 Compensation; or

             (2) the highest aggregate percentage of Section 415 Compensation at
which Employer Matching Contributions, Discretionary Contributions, and Employee
Pre-Tax Contributions are made (or required to be made) and allocated under
Article IV for any Key Employee for the Plan Year.

         If a Participant is covered by more than one defined contribution plan
on account of his employment with the Employer and/or any Affiliate, the minimum
allocation required by this Section shall be determined by aggregating the
allocations under all such plans.

         (c) (1) Notwithstanding Section 5.5, for any Plan Year in which the
Plan is a Top-Heavy Plan, a Participant who has earned at least one hour of
service during such Plan Year shall have a vested interest in those portions of
his Individual Account which are not automatically one hundred percent (100%)
vested, including allocations made to those portions of the Account in Plan
Years prior to the Plan becoming Top-Heavy, determined as follows:

================================================================================
       Years of Vesting Service                      Vested Interest
- --------------------------------------------------------------------------------
                  0                                         0%
- --------------------------------------------------------------------------------
                  1                                        20%
- --------------------------------------------------------------------------------
                  2                                        40%
- --------------------------------------------------------------------------------
                  3                                        60%
- --------------------------------------------------------------------------------
              4 or more                                    100%
================================================================================

             (2) If the Plan ceases to be a Top-Heavy Plan, the vesting rules
set forth in Section 5.5 shall again apply except that:

                 (A) any portion of a Participant's Individual Account that was
vested before the Plan ceased to be a Top-Heavy Plan shall remain vested, and

                 (B) any Participant with three or more years of service shall
have the option to continue to have his vested interest in those portions of his
Individual Account which are not automatically one hundred percent (100%) vested
determined under this Section 11.1(c).


                                      -64-
<PAGE>

         (d) Impact on Minimum and Maximum Benefits where Employer Maintains
Both Defined Benefit and Defined Contributions Plans

             (1) Impact on Minimum. If the Employer (or any Affiliate) maintains
a defined benefit plan in addition to this defined contribution plan, both of
which are Top-Heavy, then:

                 (A) in the case of non-Key Employee participants covered only
by the defined benefit plan, the minimum benefit under the defined benefit plan
shall be provided; and

                 (B) in the case of non-Key Employee Participants not covered by
the defined benefit plan or covered by both plans, a minimum allocation of five
percent (5%) of such non-Key Employee Participant's Section 415 Compensation
shall be provided. If a Participant is covered by more than one defined
contribution plan on account of his employment with the Employer and/or any
Affiliate, the minimum allocation required by this Section shall be determined
by aggregating the allocations under all such defined contributions plans.

             (2) Impact on Maximum. If the Employer (or any Affiliate) maintains
a defined benefit plan in addition to this defined contribution plan, both of
which are Top-Heavy, Section 4.7 shall be read by substituting the number "1.00"
for the number "1.25" wherever it appears therein, unless (A) the total
aggregate accrued benefits under both such plans for Key Employees does not
exceed 90% of the total aggregate accrued benefits under both such plans for all
Employees (computed in the same manner as the determination in subsection (a)),
and (B)(i) paragraph (1) is read by substituting "seven and one-half percent (7
1/2%)" for "five percent (5%)," and (ii) in the case of non-Key Employee
participants covered only by the defined benefit plan, a minimum benefit of
three percent (3%) for each year of service (not to exceed 10) shall be
provided.

11.2     Top-Heavy Definitions

         Determination Date - With respect to any Plan Year, the last day of the
preceding Plan Year.

         Key Employee - Any Employee or former Employee who at any time during
the Plan Year containing the Determination Date, or the four preceding Plan
Years, is or was (1) an officer of the Employer having annual Section 415
Compensation for such Plan Year which is in excess of 50 percent of the dollar
limit in effect under Code Section 

                                      -65-
<PAGE>


415(b)(1)(A) for the calendar year in which such Plan Year ends (but in no event
shall the number of officers taken into account as Key Employees exceed the
lesser of (i) 50 or (ii) the greater of 3 or 10% of all employees); (2) an owner
of (or considered as owning within the meaning of Code Section 318) both more
than a 1/2 percent interest as well as one of the ten largest interests in the
Employer and having annual Section 415 Compensation greater than the dollar
limit in effect under Code Section 415(c)(1)(A) for such Plan Year; (3) a five
percent owner of the Employer; or (4) a one percent owner of the Employer who
has annual Section 415 Compensation of more than $150,000. For purposes of
determining five percent and one percent owners, neither the aggregation rules
nor the rules of subsections (b), (c) and (m) of Code Section 414 apply.
Beneficiaries of an Employee acquire the character of the Employee who performed
services for the Employer. Also, inherited benefits will retain the character of
the benefits of the Employee who performed services for the Employer. A non-Key
Employee is any Employee who is not a Key Employee, or who is a former Key
Employee.

         Permissive Aggregation Group - Each employee pension benefit plan
maintained by the Employer (or any Affiliate) which is considered part of the
Required Aggregation Group, plus one or more other employee pension benefit
plans maintained by the Employer (or any Affiliate) that are not part of the
Required Aggregation Group but that satisfy the requirements of Section
401(a)(4) and Section 410 of the Code when considered together with the Required
Aggregation Group.

         Required Aggregation Group - Each employee pension benefit plan
maintained by the Employer (or any Affiliate), whether or not terminated, in
which a Key Employee participates in the Plan Year containing the Determination
Date or any of the four preceding Plan Years, and each other employee pension
benefit plan maintained by the Employer (or any Affiliate), whether or not
terminated, in which no Key Employee participates but which during the same
period enables any employee pension benefit plan in which a Key Employee
participates to meet the requirements of Section 401(a)(4) or Section 410 of the
Code.

                                      -66-



<PAGE>

                                   ARTICLE XII
                                  MISCELLANEOUS

12.1     Governing Law

         The Plan shall be construed, regulated and administered according to
the laws of Massachusetts except in those areas preempted by the laws of the
United States of America.

12.2     Construction

         The headings and subheadings in the Plan have been inserted for
convenience of reference only and shall not affect the construction of the
provisions hereof. In any necessary construction the masculine shall include the
feminine and the singular the plural, and vice versa.

12.3     Administration Expenses

         The expenses of administering the Fund and the Plan may be paid either
by the Employer or from the Fund, as directed by the Corporation.

12.4     Participant's Rights; Acquittance

         No Participant in the Plan shall acquire any right to be retained in
the Employer's employ by virtue of the Plan, nor, upon his dismissal, or upon
his voluntary termination of employment, shall he have any right or interest in
and to the Fund other than as specifically provided herein. The Employer shall
not be liable for the payment of any benefit provided for herein. All benefits
hereunder shall be payable only from the Fund.

12.5     Spendthrift Clause

         Except as provided by a qualified domestic relations order within the
meaning of ERISA Section 206(d)(3), none of the benefits, payments, proceeds, or
distributions under this Plan shall be subject to the claim of any creditor of a
Participant or a Beneficiary hereunder or to any legal process by any creditor
of a Participant or Beneficiary. Neither a Participant or Beneficiary shall have
any right to alienate, commute, anticipate, or assign any of the benefits,
payments, proceeds or distributions under this Plan. 

12.6     Merger, Consolidation or Transfer

         In the event of the merger or consolidation of the Plan with another
plan or transfer of assets or liabilities from the Plan to another plan, each
then Participant or 

                                      -67-
<PAGE>


Beneficiary shall not, as a result of such event, be entitled on the day
following such merger, consolidation or transfer under the termination of the
Plan provisions to a lesser benefit than the benefit he was entitled to on the
day prior to the merger, consolidation or transfer if the Plan had then
terminated. 

12.7     Mistake of Fact

         Notwithstanding anything herein to the contrary, upon the Employer's
request, a Contribution which was made by a mistake of fact, or conditioned upon
initial qualification of the Plan or upon the deductibility of the Contribution
under Code Section 404, may be returned to the Employer by the Trustee within
one (1) year after the payment of the Contribution, the denial of the
qualification or the disallowance of the deduction (to the extent disallowed),
whichever is later. For purposes of the preceding sentence, all contributions to
the Plan made before receipt of a favorable determination letter on
qualification from the Internal Revenue Service shall be conditioned on the
Plan's initial qualification, and all contributions, whenever made, shall be
conditioned on their deductibility under Code Section 404. 

12.8     Counterparts

         The Plan and the Trust Agreement may be executed in any number of
counterparts, each of which shall constitute but one and the same instrument and
may be sufficiently evidenced by any one counterpart.

12.9     Transitional Rule

         Notwithstanding any provision in this Plan to the contrary, no
contribution by or on behalf of any Participant shall be made under this Plan
for any period during which any contribution by or on behalf of such Participant
is made while such Participant is a participant in a Merged Plan.

                                      -68-



<PAGE>

                                  ARTICLE XIII
                              ADOPTION OF THE PLAN

         Anything herein to the contrary notwithstanding, this amended and
restated Plan is adopted and maintained under the condition that it is qualified
by the Internal Revenue Service under Code Section 401(a) and that the Trust
hereunder is exempt under Code Section 501(a).

         As evidence of its adoption of the restated Plan, Covance Inc. and the
participating employers have caused this instrument to be signed by its
authorized officer this ___ day of __________, 199__, effective as of
________________, except as otherwise provided herein.



Covance Inc. hereby signifies its adoption of this Plan.


ATTEST:                           COVANCE INC. (f/k/a Corning Pharmaceutical
                                  Services Inc.


____________________________      By:___________________________________(SEAL)
                                  (Title)


                                  Date:__________________________________


Covance Preclinical Corporation Inc. hereby signifies its adoption of this Plan.


ATTEST:                           COVANCE PRECLINICAL CORPORATION
                                  (f/k/a HazletonCorporation)



___________________________       By:__________________________________(SEAL)
                                  (Title)




                                      -69-



<PAGE>

         Covance Clinical and Periapproval Services Inc. hereby signifies its
adoption of this Plan.


ATTEST:                          COVANCE CLINICAL AND PERIAPPROVAL SERVICES INC.
                                 (f/k/a Corning Besselaar, Inc.)


____________________________      By:___________________________________(SEAL)
                                  (Title)


                                  Date:__________________________________




         Covance Clinical Research Unit Inc., a wholly-owned subsidiary of
Covance Clinical and Periapproval Services Inc., hereby signifies its adoption
of this Plan.


ATTEST:                           COVANCE CLINICAL RESEARCH UNIT INC.
                                  (f/k/a Corning Besselaar Clinical Research
                                   Unit, Inc.)


____________________________      By:___________________________________(SEAL)
Secretary                         (Title)


                                  Date:__________________________________





         Covance Periapproval Services Inc., a wholly-owned subsidiary of
Covance Clinical and Periapproval Services Inc., hereby signifies its adoption
of this Plan.


ATTEST:                           COVANCE PERIAPPROVAL SERVICES INC.
                                  (f/k/a Corning Pact, Inc.)


____________________________      By:___________________________________(SEAL)
                                  (Title)


                                  Date:__________________________________



         Covance Laboratories Inc., a wholly-owned subsidiary of Covance
Preclinical Corporation, hereby signifies its adoption of this Plan.

                                      -70-
<PAGE>

ATTEST:                           COVANCE LABORATORIES INC.
                                  (f/k/a Corning Hazleton Inc.)


____________________________      By:___________________________________(SEAL)
                                  (Title)


                                  Date:__________________________________




         Covance Research Products Inc., a wholly-owned subsidiary of Covance
Preclinical Corporation, hereby signifies its adoption of this Plan.


ATTEST:                           COVANCE RESEARCH PRODUCTS INC.
                                  (f/k/a HRP, Inc.)


____________________________      By:___________________________________(SEAL)
                                  (Title)


                                  Date:__________________________________





         Covance Pharmaceutical Packaging Services Inc. hereby signifies its
adoption of this Plan.


ATTEST:                           COVANCE PHARMACEUTICAL PACKAGING SERVICES INC.
                                  (f/k/a Corning National Packaging, Inc.)


____________________________      By:___________________________________(SEAL)
                                  (Title)


                                  Date:__________________________________



         Covance Central Laboratory Services Inc. hereby signifies its adoption
of this Plan.


                                      -71-
<PAGE>


ATTEST:                           COVANCE CENTRAL LABORATORY SERVICES INC.
                                  (f/k/a Corning Scicor, Inc.)


____________________________      By:___________________________________(SEAL)
                                  (Title)


                                  Date:__________________________________



         Covance Health Economics and Outcome Services Inc. hereby signifies its
adoption of this Plan.


ATTEST:                       COVANCE HEALTH ECONOMICS AND OUTCOME SERVICES INC.
                              (f/k/a Corning HTA Inc.)


____________________________      By:___________________________________(SEAL)
                                  (Title)


                                  Date:__________________________________



         Covance Biotechnology Services Inc., hereby signifies its adoption of
this Plan.



ATTEST:                           COVANCE BIOTECHNOLOGY SERVICES INC.


____________________________      By:___________________________________(SEAL)
                                  (Title)


                                  Date:__________________________________




         Covance Central Laboratory Limited Partnership (d/b/a Covance Central
Laboratory Services Inc. f/k/a Corning SciCor Limited Partnership), hereby
signifies its adoption of this Plan.


ATTEST:                           COVANCE CENTRAL LABORATORY LIMITED PARTNERSHIP


                                      -72-
<PAGE>


                                 (d/b/a Covance Central Laboratory Services Inc.
                                 f/k/a Corning SciCor Limited Partnership)


____________________________      By:___________________________________(SEAL)
Secretary                         (Title)


                                  Date:__________________________________








                                      -73-



<PAGE>





                                  Supplement A
                                       TO
                         THE STOCK PURCHASE SAVINGS PLAN
                                       OF
                                  COVANCE INC.

                      EMPLOYEE STOCK OWNERSHIP PLAN (ESOP)

A-1 Purpose. The purpose of this Supplement A to the Plan is to set forth the
terms of the Plan as applied to the portion of the ESOP attributable to Exempt
Loans as described in subsection A-4.

A-2 Effective Date. The effective date of this Supplement A is December 31,
1996.

A-3 Participation. Each Participant in the Plan on the Effective Date of this
Supplement A shall immediately become a Participant in this Supplement A. Every
other person who thereafter becomes a Participant in the Plan shall at the same
time become a Participant in this Supplement A.

A-4 Exempt Loan. Any loan to the Plan or Trust not prohibited by section 4975(c)
of the Code, including a loan which meets the requirements set forth in section
4975(d)(3) of the Code and the regulations promulgated thereunder, the proceeds
of which are used to finance the acquisition of ESOP Stock or to refinance such
a loan. An Exempt Loan shall be for a specific term, shall bear a reasonable
rate of interest and shall not be payable on demand except in the event of
default. An Exempt Loan may be secured by a pledge of the financed shares so
acquired (or acquired with the proceeds of a prior Exempt Loan which is being
refinanced). No other Trust Fund assets may be pledged as collateral for an
Exempt Loan, and no lender shall have recourse against Trust Fund assets other
than any financed shares remaining subject to pledge. If the lender is a party
in interest (under ERISA), the Exempt Loan must provide for a transfer of Trust
Fund assets on default only upon and to the extent of the failure of the Trust
to meet the payment schedule of the Exempt Loan. Any pledge of financed shares
must provide for the release of the shares so pledged as payments on the Exempt
Loan are made by the Trustee and such financed shares are allocated to
Participants' accounts. Payments of


                                       A1


<PAGE>



principal on any Exempt Loan shall be made by the Trustee (as directed by the
Committee) only from Employer contributions paid in cash under the Plan to
enable the Trust to repay such Exempt Loan, from earnings attributable to such
Employer contributions and from any cash dividends received by the Trust on such
financed shares or dividends on such other shares of Employer Stock as is
permitted under Code section 404(k).

A-5 Investment of Exempt Loan Proceeds. The Employer may direct the Trustee to
enter into one or more Exempt Loans to finance the acquisition of ESOP Stock.
Proceeds from an Exempt Loan may be used to acquire ESOP Stock from the
Employer's shareholders or directly from the Employer. If such shares are
purchased from the Employer, no commission may be charged with respect thereto
and the sale price shall not be more than the fair market value thereof, defined
for this purpose with respect to the Employer's common stock to be said common
stock's New York Stock Exchange (or other national stock exchange) closing price
on the first business day immediately preceding the date of sale. There shall be
no limit on the amount of stock of the Employer which may be held at any one
time by the Trustee in the Trust Fund regardless of the percentage which such
stock so held bears to the assets of the Trust Fund or to the outstanding shares
of stock of the Employer or for any other reason.

Notwithstanding any other provision of the Plan, all proceeds of an Exempt Loan
shall be used, within a reasonable time after receipt by the Trust Fund, for the
following purposes:

         (a)      To acquire ESOP Stock;

         (b)      To repay the same Exempt Loan; or

         (c)      To repay any previous Exempt Loan.

ESOP Stock acquired by the Trust Fund through an Exempt Loan shall be initially
maintained in a Suspense Account and shall thereafter be released from suspense
and allocated to Participants' ESOP Accounts as hereinafter provided.


                                       A2


<PAGE>






A-6 Supplement A Cash Equivalents Fund. All cash dividends on Employer Stock
held in a Suspense Account which are not allocated to Participants' accounts or,
in the case of allocated shares, which the Employer directs are to be used to
make payments on Exempt Loans and all Employer Matching Contributions required
under Section A-7 shall be credited to the Supplement A Cash Equivalents Fund
pending their application to Exempt Loan payments. Except as provided under
Section 7.5, all such dividends and all earnings of the Supplement A Cash
Equivalents Fund shall be used to make principal payments on outstanding Exempt
Loans to the extent then due. In the event that the amount of such dividends and
earnings exceeds the amount of principal payable on that date, the excess shall
be applied until exhausted to interest payable on that date, and principal and
interest payments due thereafter. Notwithstanding the preceding sentences of
Section A-6, in lieu of making payments on outstanding Exempt Loans, the
Committee may direct that all or any amount of cash dividends received with
respect to Employer Stock allocated to participants' accounts shall be credited
proportionately to such Participants' Accounts pending investment in the
Employer Stock Fund. Any amount that is applied to make a payment on an
outstanding Exempt Loan after the last day of a plan year (the "prior plan
year"), but on or before the due date (including extensions thereof) for the
filing of the federal income tax return of the Employer for the tax year in
which the last day of such prior plan year occurs, may be designated by the
employers as a payment with respect to such prior plan year.

A-7 Coordination with Employer Contributions. For each Plan Year the Employer
shall make contributions under this Section A-7 which, after taking into account
the use of dividends and earnings in accordance with Section A-6, are sufficient
to meet all scheduled payments of principal and interest on outstanding Exempt
Loans. Employer contributions under Sections 3.2 (matching) and 3.3
(discretionary) shall be applied against payments on any Exempt Loan to the
extent the Committee in its sole discretion shall determine and ESOP Stock shall
then be released. An Employer's obligations to contribute under Sections 3.2 and
3.3 shall be reduced for such month by the fair market value as of the date of
release of the ESOP Stock so released or otherwise allocated as below provided.
To the extent said fair market value is less than said Employer's obligations
under Sections 3.2 and 3.3 for any such month, the Employer shall make further
contributions to the Trust Fund to fully meet said obligations. For each Plan
Year,


                                       A3


<PAGE>



if for a calendar month the fair market value as of the date of release of the
shares so released is in excess of the Employer's obligations to contribute
under Sections 3.2 and 3.3 for such month, the shares released for said month
representing the excess ("excess shares") shall continue to be held by the
Trustee and shall thereafter be allocated to the Participants' Employer Matching
Accounts in the following manner: first, if in a succeeding calendar month
within said Plan Year, the fair market value of the shares so released for said
month are less than the Employer's obligations to contribute under Sections 3.2
and 3.3 for said month, then "excess shares" remaining unallocated for any prior
calendar month in said Plan Year shall be allocated to the Participants'
Matching Contribution Accounts to the extent that said Employer obligations
exceed the value of the released shares, and for this purpose said "excess
shares" to be so allocated shall be valued at the same value as the value of the
shares released for said month; and second, if as of the last day of the Plan
Year there remain "excess shares" which have not been allocated to Participants'
Matching Contribution Accounts as aforesaid, said "excess shares" shall be
allocated as of the last day of the Plan Year to the Participants' Matching
Contribution Accounts, as the Committee may determine in its sole discretion on
a year-to-year basis, in direct proportion to the value (determined as of the
date allocated to the Participants' Matching Contribution Accounts) of those
shares released and allocated to the Fund so determined by the Committee,
together with all other Employer contributions to Participants' Matching
Contribution Accounts for said Plan Year. In addition to the foregoing
contributions, in any Plan Year, the Employers may make supplemental
contributions to be used by the Trustee to prepay any Exempt loan, to pay
expenses of the Plan and any related trust and to satisfy the dividend
requirements for that year with respect to Employer Stock allocated to
Participants' Employer Matching Accounts. All Employer Matching Contributions
shall be used to make payments on Exempt Loans to the extent required to meet
any scheduled payments of principal and interest after taking into account the
use of dividends and earnings in accordance with Section A-6.

A-8 Release of Employer Stock From Suspense Account. As of the last day of each
Plan Year, of each calendar quarter in the case of the Employer Stock allocable
for the year as dividend replacements under paragraph A-9(a), or of such other
period provided under the terms of an Exempt Loan, throughout the duration of an
Exempt Loan, a portion of the Employer Stock acquired with the proceeds of such
Exempt Loan shall be


                                       A4


<PAGE>


withdrawn from the Suspense Account and allocated to eligible Participants'
Matching Contribution Accounts in accordance with the provisions of Section A-9.

         (a)      Subject to the provisions of paragraph (b) below, the number
                  of shares of Employer Stock which shall be released from the
                  Suspense Account for any plan year (calculated separately with
                  respect to each Exempt Loan) shall be equal to the product of:

                  (i)      the number of shares of Employer Stock acquired with 
                           the proceeds of the Exempt Loan

                                     Multiplied by

                  (ii)     a fraction, the numerator of which is the amount of
                           principal and interest paid on that loan for that
                           Plan Year and the denominator of which is the amount
                           of principal and interest paid or payable on that
                           loan for that Plan Year and for all future years.

                  For purposes of determining the fraction in (ii), if the
                  interest rate under the Exempt Loan is variable, the interest
                  rate to be paid in future months shall be assumed to be equal
                  to the interest rate applicable as of the applicable month.

         (b)      Notwithstanding the provisions of paragraph (a) above, if
                  provided by the terms of an Exempt Loan or directed by the
                  Committee prior to the first payment of interest on any Exempt
                  Loan, the number of shares of Employer Stock attributable to
                  such Exempt Loan which are withdrawn from the Suspense Account
                  for any Plan Year shall be proportionate to principal payments
                  only, provided that:

                  (i)      such withdrawal is consistent with the provisions of
                           the Exempt Loan with respect to the release of
                           Employer Stock as collateral, if any, for such loan;


                                       A5


<PAGE>






                  (ii)     the Exempt Loan provides for annual payments of
                           principal and interest at a cumulative rate that is
                           not less rapid at any time than level annual payments
                           of such amounts for ten years;

                  (iii)    interest is disregarded for purposes of determining
                           such release only to the extent that it would be
                           determined to be interest under standard loan
                           amortization tables; and

                  (iv)     the term of the ESOP Loan, together with any renewal,
                           extension or refinancing thereof, does not exceed ten
                           years.

         (c)      Notwithstanding the foregoing, in the event such Exempt Loan
                  shall be repaid with the proceeds of a subsequent Exempt Loan
                  (the "Substitute Loan"), such repayment shall not operate to
                  release all such ESOP Stock in the suspense account, but,
                  rather, such release shall be effected pursuant to the
                  foregoing provisions of this Section on the basis of payments
                  of principal and interest on such Substitute Loan.


         (d)      If at any time there is more than one Exempt Loan outstanding,
                  then separate Suspense Accounts may be established for each
                  such Loan. Each Exempt Loan for which a separate Suspense
                  Account is maintained may be treated separately for purposes
                  of the provisions governing the release of ESOP Stock from
                  suspense under this Section and for purposes o the provisions
                  governing the application of Employer contributions to repay
                  an Exempt Loan.

A-9 Allocation and Crediting of Employer Stock to Employer Match Accounts and
Application to Plan Limitations. Employer Stock released from the Suspense
Account during any Plan Year shall be allocated and credited as follows:


                                       A6


<PAGE>


         (a)      To the extent that dividends on Employer Stock previously
                  allocated to the Individual Account of a Participant have been
                  used to make payments on an Exempt Loan, such account shall be
                  credited with Employer Stock with a fair market value
                  determined as of the last day of the month preceding the month
                  of the dividend payment date equal to the amount of such
                  dividend.

         (b)      As of each calendar month, any Employer Stock released from
                  the Suspense Account during the Plan Year ending on that date
                  and not credited in accordance with paragraph (a) shall be
                  credited to the Employer Matching Accounts of eligible
                  Participants pursuant to Section 4.3, in order to satisfy the
                  obligation under Section 3.2.

         (c)      For purposes of Section 4.6 of the Plan, Employer Matching
                  Contributions for any Plan Year which are utilized to make any
                  payment of principal or interest on an Exempt Loan shall be
                  deemed to have been allocated among Participants in the same
                  ratios as the number of shares of Employer Stock released from
                  the Suspense Account as credited in accordance with paragraph
                  (b) above, without regard to the value of the Employer Stock
                  released from the Suspense Account.

         (d)      All Employer Stock allocated to Participants in accordance
                  with paragraph (b) above shall be treated as Employer Matching
                  Contributions for purposes of Section 3.2 and as "Matching
                  Contributions" for purposes of section 401(m) of the Internal
                  Revenue Code.

          (e)     It is intended that the provisions of this Supplement A shall
                  be applied and construed in a manner consistent with the
                  requirements and provisions of Treasury Regulations ss.
                  54.4975-7(b) (8), and any successor regulation thereto. The
                  number of shares allocable to a Participant's Matching
                  Contribution Account shall be the number of shares which bears
                  the same ratio to the total shares released for such month and
                  allocable to the contribution made by or on behalf of such
                  Participant by his participating Employer under Sections 3.2
                  and 3.3 for such month bears to the total 

                                       A7


<PAGE>




                  Employer contributions under Sections 3.2 and 3.3 made on
                  behalf of all such Participants for such month, provided,
                  however, that the fair market value of the shares so allocated
                  as of the date of such allocation shall not exceed the
                  Employer's obligation to contribute under such Sections on
                  behalf of such Participant for such month, and any shares in
                  excess of said participating Employer obligations ("excess
                  shares") for all Participants are to be then allocated as
                  described above in Section A-7.

         (f)      Notwithstanding the foregoing provisions of this Section, if
                  more than one-third of the total allocations to Participants'
                  accounts with respect to a Plan Year would be allocated in the
                  aggregate to the accounts of Highly Compensated Employees and
                  attributable to the Employer Matching Contribution allocated
                  to Employer Stock, then the allocations to the accounts of
                  Highly Compensated Employees shall be reduced, pro rata, in an
                  amount sufficient to reduced the amounts allocated to the
                  accounts of such Participants to an amount not in excess of
                  one- third of the total allocations to Participants' accounts
                  with respect to such Plan Year and any shares of Employer
                  Stock which are prevented from being allocated due to said
                  restriction shall be allocated as though Highly Compensated
                  Employees did not participate in the Plan.

A-10 Diversification Election By Participants. A Qualified Participant is
eligible to elect a diversification of Employer Stock under the conditions
specified in Section 2.6.

A-11 Put Option. Employer Stock acquired with the proceeds of an Exempt Loan
must be subject to a put option, if at the time of its distribution it is either
subject to a trading limitation, or is not publicly traded. For purposes of this
paragraph (b), a "trading limitation" on a security is a restriction under any
Federal or state securities law, any regulation thereunder, or an agreement, not
prohibited by Treasury regulations Section 54.4975-7(b) affecting the security
so as to make the security not as freely tradable as one not subject to such a
restriction. The put option must be exercisable only by a Participant, a
Beneficiary or by any donee of the Participant or by a person to whom the
security passes by reason of a Participant's death. The put option must permit a


                                       A8


<PAGE>






Participant to put the security to the Corporation, and it may grant the trust
an option to assume the rights and obligations of the Corporation at the time
that the put option is exercised, but under no circumstances may the put option
bind the Trust. If it is known at the time an Exempt Loan is made that Federal
or state law will be violated by the Corporation's honoring such a put option,
the put option must permit the security to be put, in a manner consistent with
such law, to a third party (for example but without limitation, to an Affiliate
or a shareholder other than the Trust) that has substantial net worth at the
time the Exempt Loan is made and whose net worth is reasonably expected to
remain substantial. A put option must be exercisable at any time during a period
or periods which include at least (A) sixty (60) days beginning on the date the
security subject to the put option is distributed by the Trustee and (B) sixty
(60) days in the next following Plan Year, in accordance with regulations issued
pursuant to Section 409 of the Code. In the case of a security that is publicly
traded without restriction when distributed, but ceases to be so traded within
the put option period(s) set forth above, the Corporation must notify each
security holder in writing on or before the tenth (10th) day after the date the
security ceases to be so traded that during the remainder of such period(s) the
security is subject to put option. The number of days between such tenth (10th)
day and the date on which notice is actually given, if later than the tenth
(10th) days, must be added to the duration of the put option. The notice must
inform distributees of the terms of the put options that they are to hold. The
price at which a put option must be exercisable is the value of the security, as
determined under Treasury Regulations Section 54.4975-11(d)(5). The provisions
for payment under a put option must provide that the Corporation or the Trust if
the Plan so elects, shall repurchase the Employer Securities as follows:

         (A)      If the distribution constitutes a total distribution within
                  the meaning of Section 409(h)(5) of the Code, payment of the
                  fair market value of the repurchased Employer Securities shall
                  be made in five (5) substantially equal annual payments, of
                  which the first shall be paid not later than thirty (30) days
                  after the Participant exercises the put option. The purchaser
                  will pay a reasonable rate of interest and provide adequate
                  security on amounts not paid after thirty (30) days;


                                       A9


<PAGE>






         (B)    If the distribution does not constitute a total distribution,
                the purchaser shall pay the Participant an amount equal to the
                fair market value of the Employer Stock repurchased no later
                than thirty (30) days after the Participant exercises the put
                option.










                                       A10


<PAGE>





                                  SUPPLEMENT B
                                       TO
                 THE STOCK PURCHASE SAVINGS PLAN OF COVANCE INC.

                  SUPPLEMENTAL LIST OF PARTICIPATING EMPLOYERS


<TABLE>
<S>                                                              <C>
Participating Employer                                           Formerly Known As
Covance Inc. (Parent)                                            Corning Pharmaceutical Services Inc.
Covance Clinical and Periapproval Services Inc.                  Corning Besselaar Inc.
         Covance Clinical Research Unit Inc.                     Corning Besselaar Clinical Research Unit
                                                                 Inc.
         Covance Periapproval Services Inc.                      Corning Pact Inc.
Covance Preclinical Corporation                                  Hazleton Corporation
         Covance Laboratories Inc.                               Corning Hazleton Inc.
         Covance Research Products Inc.                          HRP Inc.


Covance Central Laboratory Services Inc.                         Corning SciCor Inc.
         Covance Central Laboratory Limited                      Corning SciCor Limited Partnership
         Partnership (dba Covance Central Laboratory
         Services Inc.)

Covance Pharmaceutical Packaging Services Inc.                   Corning National Packaging Inc.
Covance Health Economics and Outcome Services                    Corning HTA Inc.
Inc.

Covance Biotechnology Services Inc.                              Corning Bio Inc.

</TABLE>



                                       B1










                                  COVANCE INC.


                      EMPLOYEE EQUITY PARTICIPATION PROGRAM


<PAGE>





                                                         -
                                  COVANCE INC.
                      EMPLOYEE EQUITY PARTICIPATION PROGRAM


       1.Purpose

       The Employee Equity Participation Program (the "Program") is intended to
encourage executive, managerial, technical and other employees of (i) Covance
Inc. (the "Corporation"), (ii) any "subsidiary corporation" of the Corporation
within the meaning of Section 424 of the Internal Revenue Code of 1986, as
amended (the "Code") or of any successor section, or (iii) any other entity in
which the Corporation holds beneficially at least one-half of the ownership
interest (such entity or "subsidiary corporation" being referred to herein as a
"Subsidiary") to become owners of stock of the Corporation in order to increase
their proprietary interest in the Corporation's success; to stimulate the
efforts of certain key executive, managerial, technical and other employees by
giving suitable recognition to services which contribute materially to the
Corporation's success; and to provide such employees with additional incentive
and reward opportunity based, in part, upon the attainment of predetermined
goals over specified periods. The Program shall consist of two plans: (a) the
Stock Option Plan and (b) the Incentive Stock Plan.

       2.Administration

       The Program shall be administered by a committee of disinterested persons
appointed by the Board of Directors of the Corporation, to be known as the
"Compensation Committee" (the "Committee"), consisting of not less than three
members of the Corporation's Board of Directors and each member of which shall
be a "non-employee director" within the meaning of Rule 16b-3(d)(1) promulgated
under the Securities Exchange Act of 1934 (the "1934 Act") or any successor
thereto and an "outside director" within the meaning set forth in regulations
promulgated under Section 162(m) of the Code. In addition, no member of the
Committee shall be an officer or employee of the Corporation or a subsidiary
thereof, a former officer of the Corporation, a former employee of the
Corporation who receives compensation for prior services (other than benefits
under a tax-qualified retirement plan) during the taxable year or any other
person who receives directly or indirectly in any capacity (other than as a
director) remuneration in excess of the lesser of $60,000 or 5 percent of the
gross income realized by the entity employing such member during such entity's
taxable year ending with or within the Corporation's taxable year or any person
who is a member of a law firm retained by, or a partner or executive officer of
an investment banking firm that performs services for, the Corporation. No
member of the Committee shall have been eligible to participate in the Program
in the preceding year nor be eligible to participate in the Program while
serving on the Committee. The Committee shall select periodically the executive,
managerial, technical and other employees who shall participate in the Program
and the extent of their participation in any particular Plan under the Program
and shall report such selections and levels of participation to the Board of
Directors.


<PAGE>



       The Committee's interpretation and construction of any provisions of this
Program or any Plan or any right, option or award granted or contract executed
under it shall be final unless otherwise determined by the Board of Directors,
which determination shall be final. No member of the Board of Directors or the
Committee shall be liable for any action or determination made in good faith.

       3.Eligibility

       The Committee shall from time to time select the executive, managerial,
technical and other employees (including officers and employees who are
directors) of the Corporation and of any Subsidiary who shall be eligible to
participate in any Plan under the Program.

       4.Stock

       The shares subject to options, grants or incentive stock rights under the
Program shall be shares of the Corporation's Common Stock par value $.01 per
share, either authorized but unissued or issued and held in treasury or such
other securities as may be issued by the Corporation in substitution therefor.
The total amount of the Common Stock of the Corporation which may be (i) sold
pursuant to options granted under the Stock Option Plan and (ii) granted, or
issued pursuant to incentive stock rights awarded, under the Incentive Stock
Plan shall not exceed 6,000,000 shares. There may be awarded under the Incentive
Stock Plan in lieu of shares the cash equivalent thereof valued at the date that
the Committee determines whether, or to what extent, performance objectives have
been met. In each case, the number of shares shall be subject to adjustment in
accordance with the provisions of Section 5.

       Shares from the unexercised portion of the options which expire or of the
options which are terminated during the period when options may be granted and
shares forfeited or not earned under the Incentive Stock Plan may again either
(i) be the subject of an option under the Stock Option Plan or (ii) be awarded
or be the subject of rights granted under the Incentive Stock Plan. Shares of
the Common Stock of the Corporation used by an optionee as full or partial
payment to the Corporation for the purchase price of shares subject to an option
agreement, the terms of which explicitly provide for the grant of an additional
option as contemplated by Section 6(a)(i) hereof, shall again be made available
for use under the Program. Shares otherwise surrendered upon the exercise of
stock options may not again be the subject of options or awards granted under
the Program. Shares surrendered under the Program in payment of taxes due upon
the exercise of stock options or upon the recognition of income for shares
issued under the Incentive Stock Plan may not again be issued under the Program.

No single eligible employee under the Stock Option Plan may receive grants of
stock options covering in excess of 600,000, or 10% of the total, shares
authorized under the Program.

       5.Recapitalization

       The number of shares of Common Stock which may be granted, awarded or
earned under the Incentive Stock Plan or made subject to options granted under
the Stock Option Plan in the aggregate and to any single eligible employee, the
number of shares covered by each outstanding option, and the price per share
thereunder, and the number of shares granted or subject to incentive stock
rights under the Incentive Stock Plan shall all be proportionally adjusted for
any increase or decrease in the number of issued shares of Common Stock of the
Corporation resulting from a subdivision or consolidation of shares or other
capital adjustment, the distribution of shares of capital stock to stockholders
of the Corporation, the payment of a stock dividend or other increase or
decrease in such shares effected without receipt of consideration by the
Corporation, or any distribution or spin-off of assets (other than a normal cash
dividend) to the stockholders of the Corporation.

       Subject to any required action by the stockholders, if the Corporation
shall be the surviving corporation in any merger or consolidation, any option
granted under the Stock Option Plan and any incentive stock right granted under
the Incentive Stock Plan shall apply to the securities to which a holder of the
number of shares of Common Stock subject to the option or such right, as the
case may be, would have been entitled before the occurrence of such event. A
dissolution or liquidation of the Corporation, or a merger or consolidation in
which the Corporation is not the surviving corporation, shall cause every option
outstanding under the Stock Option Plan to terminate, except that the surviving
corporation may, in its absolute and uncontrolled discretion, tender an option
or options to purchase its shares on terms and conditions, both as to number of
shares and otherwise, which will substantially preserve the rights and benefits
of any option then outstanding under the Stock Option Plan. Upon the dissolution
or liquidation of the Corporation, or upon the effective date of any merger or
consolidation in which the Corporation is not the survivor and in which the
survivor has not tendered options as provided in the preceding sentence, the
Corporation shall deliver to each optionee whose incentive stock options are
being terminated an amount in cash equal to the difference between the option
price and the fair market value of a share of the Corporation's Common Stock
determined in good faith by the Committee. In the case of such a merger or
consolidation in which the Corporation is not the survivor, the Corporation
shall also deliver to each person whose incentive stock options are being
terminated and to each person who had exercised an incentive stock option and
who was holding the shares so purchased for long-term capital gains treatment an
amount equal to the difference between the federal income tax which the person
would be required to pay as a result of being unable to hold such shares for
long-term capital gains purposes (assuming a sale price equal to the fair market
value as provided above) and the tax such person is required to pay as a result
of having to dispose of shares on account of such merger or consolidation.

       In the event of a change in the Corporation's presently authorized Common
Stock which is limited to a change of authorized shares with par value into the
same number of shares with a different par value or into the same number of
shares without par value, the shares resulting from any such change shall be
deemed to be Common Stock within the meaning of the Program.

       6.Stock Option Plan

        (a) The Committee may from time to time grant options, including but not
        limited to performance-based stock options and incentive stock options
        permitted by Section 422 of the Code, to purchase shares of Common
        Stock, evidenced by agreements in such form as the Committee may, from
        time to time, approve, containing in substance the following terms and
        conditions:

                (i) The option price shall be payable in full upon the exercise
                of the option and may be paid either in United States dollars,
                or under rules established and maintained from time to time by
                the Committee, in shares of the Common Stock of the Corporation
                owned by the optionee, or a combination of cash and shares.
                Under such rules, an optionee paying the purchase price of an
                option in already-owned, freely transferable, unencumbered
                shares of Common Stock of the Corporation may receive new
                options to purchase shares of Common Stock of the Corporation at
                the then current market price (being the mean between the high
                and low selling prices of the Corporation's Common Stock on the
                New York Stock Exchange on the date of exercise) for the same
                number of shares surrendered upon exercise of the original
                option. In no circumstance will the total number of shares
                subject to the new option granted exceed the number of shares
                surrendered upon exercise of the original option, will the new
                option be exercisable within twelve months of the date of
                exercise or will the new option have a life beyond that of the
                original option.

                Shares of the Corporation's Common Stock shall be valued at the
                mean between the high and low selling prices of the
                Corporation's Common Stock on the New York Stock Exchange on the
                date of exercise.

       (ii)     The option shall state the total number of shares to which it
                pertains.

                (iii) The option price shall be not less than 100% of the fair
                market value of the shares on the date of the granting of the
                option.

                (iv) Each option granted under the Stock Option Plan shall
                expire on the date designated by the Committee but in no event
                more than ten years from the date the option is granted.

                (v) The Committee may in its discretion provide that an option
                may not be exercised in whole or in part for any period or
                periods of time specified by the Committee. Except as may be so
                provided by the Committee and except as otherwise provided
                herein, any option may be exercised in whole at any time or in
                part from time to time after the option has vested in accordance
                with the terms of the applicable agreement and during its term;
                provided, however, that in no circumstance will an option under
                the Stock Option Plan become exercisable in less than twelve
                months from the date of grant.

                (vi) The aggregate fair market value (determined as of the time
                the option is granted) of the stock for which any employee may
                be granted incentive stock options under this Plan or any other
                plans of the Corporation or any subsidiary of the Corporation
                shall not exceed $100,000 (or such other limit as may be in
                effect from time to time under Section 422 of the Code or any
                statutory successor thereto) in any calendar year in which such
                option or any portion thereof first becomes exercisable pursuant
                to the terms of the agreement between such employee and the
                Corporation.

                (vii) If, in the opinion of counsel for the Corporation, the
                listing, registration or qualification of the shares subject to
                option under any securities exchange or under any state or
                Federal law, or the consent or approval of any governmental
                regulatory body, or an exemption from registration, is necessary
                or desirable, each option shall be subject to the requirement
                that such option may not be exercised in whole or in part unless
                such listing, registration, qualification, consent, approval or
                exemption shall have been effected or obtained free of any
                conditions not acceptable to the Committee.

                (viii) An optionee shall have no rights as a stockholder with
                respect to shares covered by his option to purchase until the
                date of the issuance or transfer of the shares to him and only
                after such shares are fully paid. No adjustment will be made for
                dividends or other rights for which the record date is prior to
                the date of such issuance or transfer, except as provided in
                Section 5.

                (ix) The option agreements authorized under the Stock Option
                Plan shall contain such other provisions not inconsistent with
                this Program as the Committee may deem advisable.

        (b) Options may be granted under the Stock Option Plan from time to time
        in substitution for stock options held by consultants to or directors or
        employees of other corporations who are about to become and who do
        concurrently with the grant of such options become consultants to or
        directors or employees of the Corporation or a Subsidiary as the result
        of a merger or consolidation of the employing corporation with the
        Corporation or a Subsidiary, or the acquisition by the Corporation or a
        Subsidiary of the assets of the employing corporation, or the
        acquisition by the Corporation or a Subsidiary of stock of the employing
        corporation as the result of which it becomes a Subsidiary. The terms
        and conditions of the substitute options so granted may vary from the
        terms and conditions set forth in Section 6 of this Program to such
        extent as the Committee at the time of grant may deem appropriate to
        conform, in whole or in part, to the provisions of the stock options in
        substitution for which they are granted. Options granted under this
        paragraph (b) or pursuant to the terms of the agreements contemplated by
        Section 6(a)(i) hereof shall not reduce the shares available for
        options, grants or incentive stock rights under the Program as set forth
        in Section 4 hereof.

        (c) If the optionee's employment by the Corporation or a Subsidiary
        shall terminate, his option shall terminate unless otherwise determined
        by the Committee, or specific provision has been otherwise made as
        evidenced by the terms of the option agreement approved by the
        Committee. The Committee shall have full power and authority to
        determine whether, to what extent and under what circumstances any
        option shall be exercisable, suspended or canceled in the event of an
        optionee's termination of employment.

         If an optionee dies while in the employ of the Corporation or a
        Subsidiary, or within three months after termination of employment with
        options exercisable pursuant to action taken by the Committee or
        otherwise in accordance with the preceding sentences, the optionee's
        estate, personal representative or beneficiary shall have the right to
        exercise such option in accordance with the terms of the option
        agreement with respect to all shares subject to option on the date of
        death.

         If an optionee shall be transferred from the Corporation to a
        Subsidiary or from a Subsidiary to the Corporation or from a Subsidiary
        to another Subsidiary, his employment shall not be deemed to have
        terminated. If an optionee shall be employed by a corporation or an
        entity which ceases to be a Subsidiary, the Committee may, subject to
        the provisions of clauses (iv) and (v) of Paragraph (a) of this Section
        6, permit the participant to exercise options held for such period of
        time as it determines with respect to all shares which were available
        for purchase by the optionee on the date the corporation or entity
        ceased to be a Subsidiary.

       7.Incentive Stock Plan

The Committee may from time to time award shares of Incentive Stock and grant
incentive stock rights, or either, to eligible employees on the terms set forth
herein.

(a)    "Incentive Stock" shall be shares of the Corporation's Common Stock
       awarded pursuant to the terms of the Incentive Stock Plan.

(b)    An "incentive stock right" shall, subject to the terms, conditions and
       limitations of this Section 7, give the holder thereof the right to
       receive in consideration of services performed for, but without payment
       of cash to, the Corporation such shares of Common Stock, cash or a
       combination of the two as the Committee may determine.

(c)    Subject to the limitations of Section 4, the Committee shall from time to
       time select, and report to the Board of Directors, (i) the individual
       employees who are to receive shares of Incentive Stock or incentive stock
       rights, or a combination thereof, (ii) the number of shares of Incentive
       Stock a designated employee is to receive, either directly or upon
       maturation of an incentive stock right, (iii) whether ownership of, or
       any portion of, such shares of Incentive Stock is to be vested in the
       designated employee without the possibility of forfeiture or other
       restrictions at the time of the Committee's action or at one or more
       specified dates in the future, (iv) whether ownership of such, or any
       portion of such, shares of Incentive Stock is to be vested in the
       designated employee at the time of the Committee's action, but subject to
       the possibility of forfeiture or other restrictions, and (v) the specific
       dates from the date of the Committee's award over which the possibility
       of forfeiture or other restrictions are to lapse.

       Shares of Incentive Stock shall be issued in the name of, and distributed
       to, those employees from time to time designated by the Board as
       recipients of Incentive Stock as follows:

       (1)    Each employee designated as a recipient of shares of Incentive
              Stock shall receive, promptly after the date or dates the
              Committee determines the number of such shares which such employee
              is to receive not subject to the possibility of forfeiture and
              other restrictions, one or more stock certificates registered in
              the name of the designated employee for such number of shares, the
              ownership of which is vested non-forfeitably and without
              restriction in such employee; and

       (2)    Certificates covering shares of Incentive Stock subject to the
              possibility of forfeiture and other restrictions shall be issued
              promptly after the date or dates the Committee determines the
              number of such shares to be issued in the name of the designated
              employee but held by the Corporation as provided in clause (e)
              below.

(d)    The shares which are granted subject to restrictions and the possibility
       of forfeiture (and all shares issued or distributed by means of
       dividends, splits, combinations, reclassifications, or other capital
       changes thereon) (i) may not be sold, assigned, transferred, pledged or
       otherwise encumbered, except (a) for gifts to a spouse, ancestors, or
       descendants, or to trusts for their benefit and (b) pursuant to the
       qualified domestic relations orders referred to in Section 9 hereof,
       subject, however, in each such case to the restrictions and possibility
       of forfeiture applicable to such shares and (ii) except as otherwise
       provided in an agreement approved by the Committee are to be forfeitable
       to the Corporation upon termination of employment for any reason other
       than death, disability approved by the Corporation or retirement with the
       consent of the Corporation. The restrictions and possibility of
       forfeiture imposed by this clause (d) shall lapse at such time and in
       such proportions as the Committee shall, subject to limitations of clause
       (c) above, determine.

(e)    Each certificate issued in respect of shares granted under the Incentive
       Stock Plan subject to restrictions on transfer and the possibility of
       forfeiture shall be registered in the name of the employee but shall be
       held by the Corporation in safekeeping for the employee and until such
       restrictions and the possibility of forfeiture shall lapse. Such
       certificates shall bear a legend substantially as follows:

       "The transferability of this certificate and the shares of stock
       represented hereby are restricted and the shares are subject to the
       further terms and conditions (including forfeiture) contained in the
       Incentive Stock Plan of Covance Inc. and an agreement executed pursuant
       thereto. A copy of such Plan and such agreement are on file in the office
       of the Secretary of Covance Inc., Princeton, New Jersey."

(f)    An employee who is to receive shares of Incentive Stock only upon the
       expiration of certain specified periods or who is the holder of an
       incentive stock right shall have no rights as a stockholder with respect
       to any shares which may become vested in, or be awarded to, him, as the
       case may be, until such shares have been actually issued.

(g)    The value of shares of the Incentive Stock or the value of the shares of
       Common Stock granted by the Corporation to the holder of an incentive
       stock right shall be the mean between the high and low selling prices of
       the Corporation's Common Stock on the New York Stock Exchange on the date
       the Committee determines that the applicable performance objectives were
       met or the date the possibility of forfeiture shall terminate, as the
       case may be.

(h)    At the time an incentive stock right is granted, the Committee shall
       establish with respect to each holder one or more performance periods and
       performance objectives. If the objectives have been met and are being
       maintained at the end of the applicable performance period to the
       satisfaction of the Committee, the holder of the incentive stock right
       shall receive promptly the shares and/or cash which are subject to the
       agreement referred to below.

(i)    Any provisions hereof the contrary notwithstanding, the Committee shall
       have the authority and the power to adjust performance periods,
       performance objectives and the number of shares which may be awarded
       pursuant to an incentive stock right if it determines that conditions so
       warrant. Such conditions may include, but need not be limited to, changes
       in functional responsibilities of a holder of an incentive stock right,
       changes in laws or government regulations, changes in accounting
       treatment or in generally accepted accounting principles, acquisitions,
       dispositions or distributions deemed to be material, or extraordinary
       events which significantly impact consolidated financial performance.

(j)    Incentive stock rights shall be evidenced by agreements in such form and
       not inconsistent with the Incentive Stock Plan as the Committee shall
       approve from time to time, which agreements shall, among other things,
       contain in substance the following terms, conditions and provisions:

         (i)    The number of shares to which the incentive stock right relates
                and whether such rights are to be paid in shares, in cash or in
                a combination or the two;

         (ii)   The length of the performance period or periods;

         (iii)  The performance objectives applicable to an individual granted
                an incentive stock right, which objectives may relate, but shall
                not be limited, to overall corporate performance measures, such
                as earnings per share, return on stockholders' equity and return
                on capital, or to divisional, subsidiary or other business unit
                performance measures, or to a combination of each; and

         (iv)   Such other rules, as determined by the Committee, governing the
                continuation of an incentive stock right after the holder
                terminates, either voluntarily or involuntarily, his employment
                with the Corporation.

(k)    Unless otherwise determined by the Committee or set forth in the
       agreement contemplated by subsection (j) above, if the holder of an
       incentive stock right shall cease to be employed by the Corporation or a
       Subsidiary, his incentive stock right shall terminate immediately.
       However, if employment is terminated on account of death, retirement or
       termination of employment with the consent of the Corporation (including
       termination by reason of retirement, disability or a Subsidiary ceasing
       to be such), the Committee may award to such employee such shares or cash
       at such time and under such conditions as it shall in its sole discretion
       determine.

        8.        Amendment and Administration of the Program

The Board of Directors may, upon the recommendation of the Committee, from time
to time alter, amend, suspend, or discontinue the Program or either Plan
thereunder, except that no alteration or amendment shall, without the approval
of the holders of a majority of the outstanding shares entitled to vote thereon,
increase the total number of shares which may be sold or awarded under the
Program, decrease the price at which options may be granted, change the
standards of eligibility of employees eligible to participate, materially
increase the benefits of the Program or either Plan thereunder to participants,
or extend the term of the Program or of options granted thereunder. Adjustments
in the total number of shares purchasable or awardable under the Program or
optioned to any individual and adjustments of the option price may be made,
however, without stockholder approval pursuant to the adjustment provisions
described under the provisions of Section 5 hereof. No amendment or modification
shall apply to affect adversely any employee with respect to incentive stock or
incentive stock rights already awarded to him or an option already granted.
Anything to the contrary in this Section 8 notwithstanding, should the
provisions of Rule 16b-3, or any successor rule, under the 1934 Act be amended,
the Board may amend the Program in accordance with any modifications to such
Rule.

With respect to persons subject to Section 16 of the 1934 Act, transactions
under the Program are intended to comply with all applicable conditions of Rule
16b-3, or any successor rule, under the 1934 Act. To the extent any provision of
the Program or action by the Committee, the Board of Directors or any
administrator fails to so comply, it shall be deemed null and void, to the
extent permitted by law and deemed advisable by the Committee or the Board of
Directors.

9.      Assignability

No option or right granted under the Program shall be assignable or transferable
except by Will, by the laws of descent and distribution, or pursuant to
qualified domestic relations orders as defined in or meeting the requirements of
the Code or Title I of the Employee Retirement Income Security Act of 1974, as
amended. During the lifetime of an optionee, an option shall be exercisable only
by him and any shares purchased upon the exercise of an option shall be issued
in the name of the optionee alone.

10.    Effective Date and Term of Program.

The Program shall become effective when approved by a majority of the votes cast
at a meeting of the Corporation's stockholders by stockholders entitled to vote
thereon. No shares may be optioned or awarded (except upon the attainment of
performance goals contemplated by Section 7(h) hereof) and no incentive stock
rights may be granted under the Program after the fifth anniversary, plus 60
calendar days, of the Program's effective date.


11.     Use of Proceeds

Proceeds from the sale of stock under the Program shall constitute general funds
of the Corporation.

12.     Withholding

Whenever under the Program shares are to be issued in satisfaction of options,
awards or rights granted thereunder, the Corporation shall have the right to
require the employee to remit to it an amount in cash, in shares of the
Corporation's Common Stock, or though the reduction of options, awards or rights
to be issued thereof, necessary to satisfy federal, state and local withholding
tax requirements prior to the delivery of any certificate or certificates for
shares. Whenever under the Program payments are to be made in cash, such payment
shall be net of an amount necessary to satisfy federal, state and local
withholding tax requirements.






                                  Covance Inc.

                     Supplemental Executive Retirement Plan



                            Effective January 1, 1997


<PAGE>



                                TABLE OF CONTENTS



                                                                           Page

ARTICLE I       INTRODUCTION..................................................1

ARTICLE II      DEFINITIONS...................................................1
         2.1    Accrued Benefit...............................................1
         2.2    Actuarial Equivalent..........................................1
         2.3    Board.........................................................2
         2.4    Change In Control.............................................2
         2.5    Code..........................................................2
         2.6    Committee.....................................................2
         2.7    Covance Inc. .................................................2
         2.8    Disability....................................................2
         2.9    Final Average Earnings........................................2
         2.10   Participant...................................................3
         2.11   Plan..........................................................3
         2.12   Plan Compensation.............................................3
         2.13   Plan Year.....................................................3
         2.14   Year of Service...............................................3

ARTICLE III     PARTICIPATION.................................................3
         3.1    Eligibility to Participate....................................3
         3.2    Commencement of Participation.................................4

ARTICLE IV      AMOUNT OF PENSION BENEFITS....................................4
         4.1    Normal Retirement Benefits....................................4
         4.2    Early Retirement..............................................4
         4.3    Late Retirement...............................................5
         4.4    Service Crediting.............................................5

ARTICLE V       VESTING.......................................................5
         5.1    Vesting of Benefits...........................................5

ARTICLE VI      DEATH PRIOR TO RETIREMENT.....................................6
         6.1    Pre-Retirement Death Benefits for Married Participants........6
         6.2    Death Benefits for Unmarried Participants.....................6




<PAGE>



ARTICLE VII     PAYMENT OF BENEFITS...........................................6
         7.1    Retirement....................................................6
         7.2    Termination of Employment.....................................6
         7.3    Forfeiture of Benefits........................................7
         7.4    Facility of Payment...........................................7
         7.5    Change In Control.............................................7

ARTICLE VIII    AMENDMENTS AND TERMINATION....................................8
         8.1    Amendments Generally..........................................8
         8.2    Right to Terminate............................................8
         8.3    No Funding Obligation.........................................9

ARTICLE IX      ADMINISTRATION AND INTERPRETATION.............................9
         9.1    Interpretation................................................9
         9.2    Payment of Expenses..........................................10
         9.3    Indemnification for Liability................................10
         9.4    Claims Procedure.............................................11
         9.5    Review Procedure.............................................11

ARTICLE X       MISCELLANEOUS PROVISIONS.....................................11
         10.1   Right of Covance Inc. . to Take Employment Actions...........11
         10.2   Alienation or Assignment of Benefits.........................12
         10.3   Applicable Law...............................................12
         10.4   Number and Gender............................................12
         10.5   Accelerated Distributions....................................12



<PAGE>


                                  Covance Inc.
                     SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN


                                    ARTICLE I
                                  INTRODUCTION

In recognition of the services provided to Covance Inc. by certain of its key
executives, the Board of Directors of Covance Inc. establishes this Supplemental
Executive Retirement Plan for the purpose of providing supplemental retirement
income for each selected individual. It is to be maintained and operated
according to the terms of this document. The Compensation Committee of the Board
of Directors of Covance Inc. shall have the sole authority to manage and
administer this Plan.

                                   ARTICLE II
                                   DEFINITIONS

As used herein, the following words and phrases shall have the meanings
described below:

         2.1 Accrued Benefit shall mean the amount of pension benefit payable as
a single life annuity as shall be considered earned at any time for a
Participant in accordance with the provisions of Article IV. Such pension
benefit shall be payable in the form chosen by the Participant pursuant to
Article VII.

         2.2 Actuarial Equivalent shall mean a lump sum benefit of equivalent
value based on the applicable mortality rates, set back one year, and 120% of
the applicable interest rate, both as published by the Pension Benefit Guaranty
Corporation for purposes of determining the present value of a lump sum
distribution on plan termination. Such lump sum benefit shall be determined as
of

                                        1

<PAGE>



the first day of the year prior to the Participant's date of retirement or other
termination of employment occurs. Application of such assumptions to the
computation of benefits payable under the Plan shall be made uniformly and
consistently with all respect to the Plan.

         2.3 Board shall mean the Board of Directors of Covance Inc.

         2.4 Change In Control shall mean a change in the control of Covance
Inc. that shall be deemed to have occurred upon the earliest to occur of the
following: (i) the date Covance Inc. becomes a party to a merger, consolidation,
or sale of substantially all of its assets or any other corporate reorganization
in which Covance Inc. will not be the surviving corporation, or in which the
holders of Covance Inc. stock will receive securities of another corporation
(ii) the purchase by an individual, or group of individuals acting in concert,
of at least thirty percent of the voting securities of Covance Inc. or (iii)
during any twenty-four month period, individuals who at the beginning of such
period constituted the Board cease for any reason to constitute a majority
thereof.

         2.5 Code shall mean the Internal Revenue Code of 1986, as amended from
time to time.

         2.6 Committee shall mean the Compensation Committee of the Board of
Directors.

         2.7 Covance Inc. shall mean Covance Inc., a Delaware Corporation and
any successor thereto.

         2.8 Disability shall mean a disability qualifying for benefits payable
under the Covance Inc. long-term disability plan under which the Participant is
covered.

         2.9 Final Average Earnings shall mean the average of the sum of the
Participant's monthly Plan Compensation during the sixty (60) consecutive
calendar months (or the total number of months if less than sixty) within the
one hundred twenty (120) months (or the total number of months if less than 120)
immediately preceding the Participant's termination of employment with Covance
Inc., in which his Plan Compensation was the highest. In the case of a disabled
Participant, who is

                                        2

<PAGE>



receiving disability benefits under any long term disability insurance provided
by Covance Inc., his Final Average Earnings shall be computed based on his Plan
Compensation immediately prior to becoming disabled.

         2.10 Participant shall mean an individual who has been designated as a
Participant in this Plan under Section 3.1. In the event of the death or
incompetency of a Participant, the term shall mean his personal representative
or guardian.

         2.11 Plan shall mean the Covance Inc. Supplemental Executive Retirement
Plan set forth in this document and as amended by Covance Inc. from time to
time.

         2.12 Plan Compensation shall mean the base salary paid to a Participant
by Covance Inc. (including salary reductions which are deferred under Section
401(k) or 125 of the Code), plus annual bonuses.

         2.13 Plan Year shall mean the calendar year.

         2.14 Year of Service shall mean a Participant's total Years of Service
as an employee of Covance Inc., including service completed with Corning and any
affiliated employer of Covance Inc. or Corning.

                                   ARTICLE III
                                  PARTICIPATION

         3.1 Eligibility to Participate. Any individual designated by the
Compensation Committee of the Board shall be eligible to participate in this
Plan. The Compensation Committee of the Board may delegate the authority to
designate eligible employees to the Chief Executive Officer. Plan Participants
shall be limited to a select group of management and highly compensated
employees of Covance Inc.

         3.2 Commencement of Participation. Each individual who has satisfied
the requirements of Section 3.1 shall commence participation in the plan upon
designation by the Compensation Committee of the Board as a Participant in the
plan.


                                        3

<PAGE>



                                   ARTICLE IV
                           AMOUNT OF PENSION BENEFITS

         4.1 Normal Retirement Benefits. A Participant who retires on or after
the completion of 20 Years of Service shall have an Accrued Benefit equal to 40%
of his Final Average Earnings payable on the attainment of age 60.
Notwithstanding the foregoing, a Participant employed with Covance Inc. on
January 1, 1997 who completes 15 Years of Service shall have an Accrued Benefit
equal to 40% of his Final Average Earnings.

         A Participant who retires or terminates employment prior to the
completion of 20 Years of Service shall have his Accrued Benefit reduced
proratably by dividing the number of completed Years of Service by 20; provided,
however, in the case of such a Participant employed by Covance Inc. on January
1, 1997, the divisor shall be 15.

         A Participant who becomes Disabled will continue to accrue Years of
Service until the earlier of age 60 or distribution commencement. A
Participant's benefits determined under this Section shall be adjusted in
accordance with Section 4.2 or Section 4.3 if his Accrued Benefit becomes
payable at other than his attainment of age 60.

         4.2 Early Retirement. A Participant who has been credited with five
Years of Service and has attained age 55 may, with Committee approval, elect to
retire before becoming eligible for normal retirement benefits. A Participant
who elects to

                                        4

<PAGE>



retire and commence benefit payments prior to the attainment of age 60, shall be
subject to a reduction in his Accrued Benefit of 5% of the amount of Accrued
Benefit for each year payment of benefits occurs prior to the Participant's
attainment of age 60.

         4.3 Late Retirement. A Participant who elects to retire and commence
benefit payments after age 60 will be entitled to an increase in his Accrued
Benefit of 5% of the amount of Accrued Benefit for each year benefit payments
are delayed beyond age 60. A Participant's Accrued Benefit will not be increased
for benefit payments that commence after age 65.

         4.4 Service Crediting. Service for purposes of determining the amount
of Accrued Benefit and vesting shall be credited under this Plan for all service
completed with Covance Inc., Corning and any affiliated employer of Covance Inc.
or Corning. In addition, a Participant may be granted, at the discretion of the
Committee, prior service credit for Years of Service with a previous employer
for the purposes of determining his Accrued Benefit and vesting. The Committee
shall credit such service in writing at the time of the Participant's
commencement of participation in this Plan and shall have the authority to
require a reduction or offset of the Participant's Accrued Benefit under this
Plan by the amount of any retirement benefit provided to the Participant under
the plan or plans of the previous employer for which prior service credit is
given.

                                    ARTICLE V
                                     VESTING

         5.1 Vesting of Benefits. A Participant shall become 100% vested in his
Accrued Benefit as of the earlier of Disability, or the crediting of five Years
of Service.



                                        5

<PAGE>



                                   ARTICLE VI
                            DEATH PRIOR TO RETIREMENT

         6.1 Pre-Retirement Death Benefits for Married Participants. In the
event of the death of a married Participant whose death occurs while still in
the employ of Covance Inc. and after the completion of five Years of Service,
his surviving spouse shall be entitled to receive an amount in the form of a
lump sum payment which shall be fifty percent (50%) of the Actuarial Equivalent
of the Accrued Benefit the Participant would have been eligible to receive under
Section 4.1 adjusted in accordance with Sections 4.2 or 4.3, if applicable, had
he retired on the day before his death. Such payment will commence as of the
date the Participant would have attained age 55, or if later, as soon as
administratively feasible after the Participant's death.

         6.2 Death Benefits for Unmarried Participants. No death benefits shall
be payable under this Plan in the event of the death of an unmarried
Participant.

                                   ARTICLE VII
                               PAYMENT OF BENEFITS

         7.1 Retirement. A Participant shall, upon his retirement, in accordance
with Article IV, be entitled to receive his Accrued Benefit in the form of one
of the following: a single life annuity payable monthly, quarterly or on an
annual basis; a lump sum equal to the Actuarial Equivalent of the Accrued
Benefit, calculated in accordance with Section 2.2; or a joint and 50% or 100%
survivor annuity actuarially reduced to reflect the joint life expectancies of
the Participant and his spouse.

         7.2 Termination of Employment. A Participant who chooses to voluntarily
terminate his employment with Covance Inc. prior to the completion of 5 Years of
Service shall forfeit any Accrued Benefit.


                                        6

<PAGE>



         7.3 Forfeiture of Benefits. Notwithstanding anything herein contained
to the contrary, no payment of any retirement benefits hereunder shall be made
and all rights under this Plan shall be forfeited if the Compensation Committee
of the Board unanimously determines that any of the following events occur:

               (a) The Participant is convicted of a felony or misdemeanor if
such misdemeanor involves moral turpitude;

               (b) The Participant has committed any act of gross negligence or
intentional misconduct in the performance or non-performance of his duties as an
employee of the Company, including any such actions which constitute sexual
harassment under applicable laws, rules or regulations;

               (c) The Participant is not disabled (as defined below), but
refuses or fails to perform the duties and services specified herein for a
period of not less than thirty (30) days;

               (d) The Participant has committed or participated in the
misappropriation of Company assets or personal dishonesty which causes financial
or reputational harm with respect to the Company.

         7.4 Facility of Payment. Whenever, in the Committee's opinion, an
individual entitled to receive any payment of a benefit hereunder is under a
legal disability or is incapacitated in any way so as to be unable to manage his
financial affairs, Covance Inc. may make payments to the legal representative of
such person or to a relative or friend of such individual for his benefit or
apply the payment for the benefit of such individual as the Committee deems
advisable.

         7.5 Change In Control. In the event of a Change in Control of Covance
Inc., each Participant in this Plan as of the date of the Change in Control who
is involuntarily or constructively terminated during the three-year

                                        7

<PAGE>



period following the Change in Control shall be credited with three additional
Years of Service and three additional years of age for Accrued Benefit and
vesting determination purposes; provided, however, that such additional credit
for these Participants shall be reduced by the period of service and increase in
age the Participant has completed and experienced between the Change in Control
and actual termination of employment.

                                  ARTICLE VIII
                           AMENDMENTS AND TERMINATION

         8.1 Amendments Generally. The Committee reserves the right to make any
amendment or amendments to this Plan from time to time which do not cause any
reduction in a Participant's Accrued Benefit at the time the amendment is
adopted or the effective date of the amendment, whichever is earlier. Any
amendment shall be made pursuant to a duly adopted resolution of the
Compensation Committee of the Board. 

         8.2 Right to Terminate. The Compensation Committee of the Board may
terminate the Plan at any time in whole or in part. Termination of the Plan
shall be made pursuant to a duly adopted resolution of the Compensation
Committee of the Board. In the event of termination, the Compensation Committee
of the Board may, at its option, pay each Participant the present value of his
Accrued Benefit at the time of termination of the Plan and make such payments in
an actuarially equivalent lump sum. In addition, the Compensation Committee of
the Board may, at its option, refrain from making payments to any Participant
until such time and in such manner as he would have been entitled to receive his
Accrued Benefit under the terms of the Plan as in effect on the date of
termination. Notwithstanding the foregoing, if the Plan terminates within three
years of a Change in Control, each Participant will be paid the present value of
his Accrued Benefit immediately. No termination of the Plan shall reduce a
Participant's Accrued Benefit as of the date of termination.

                                        8

<PAGE>



         8.3 No Funding Obligation. The obligation of Covance Inc.to pay any
benefits under this Plan shall be unfunded and unsecured; any payments under
this Plan shall be made from the general assets of Covance Inc. However, the
Board, in its discretion, may authorize the establishment of a rabbi trust or
any other funding vehicle it deems appropriate in order to set aside assets to
discharge its obligations under this Plan.

                                   ARTICLE IX
                        ADMINISTRATION AND INTERPRETATION

         9.1 Interpretation. The Committee may take any action, correct any
defect, supply any omission or reconcile any inconsistency in the Supplemental
Executive Retirement Plan, or in any election hereunder, in the manner and to
the extent it shall deem necessary to carry the Supplemental Executive
Retirement Plan into effect or to carry out the Board's purposes in adopting the
Plan. Any decision, interpretation or other action made or taken in good faith
by or at the direction of Covance Inc., the Board, or the Committee, arising out
of or in connection with the Supplemental Executive Retirement Plan, shall be
within the absolute discretion of all and each of them, as the case may be, and
shall be final, binding and conclusive on Covance Inc., and all Participants and
their respective heirs, executors, administrators, successors and assigns. The
Committee's determinations hereunder need not be uniform, and may be made
selectively among Participants, whether or not they are similarly situated. Any
actions to be taken by the Committee will require the consent of a majority of
the Committee members. If a member of the Committee is a Participant in this
Supplemental Executive Retirement Plan, such member may not decide or determine
any matter or question concerning his benefits under this Supplemental Executive
Retirement Plan that such member would not have the right to decide or determine
if he were not a member.


                                        9

<PAGE>



        9.2 Payment of Expenses. Covance Inc., in such proportions as the
Committee determines, shall bear all expenses incurred by them and by the
Committee in administering this Plan. If a claim or dispute arises concerning
the rights of a Participant or Beneficiary to amounts deferred under this Plan,
regardless of the party by whom such claim or dispute is initiated, Covance Inc.
shall (in such proportions as between Covance Inc. as the Committee determines),
and upon presentation of appropriate vouchers, pay all legal expenses, including
reasonable attorneys' fees, court costs, and ordinary and necessary
out-of-pocket costs of attorneys, billed to and payable by the Participant or by
anyone claiming under or through the Participant (such person being hereinafter
referred to as the "Participant's Claimant"), in connection with the bringing,
prosecuting, defending, litigating, negotiating, or settling of such claim or
dispute; provided, that:

               (a) The Participant or the Participant's Claimant shall repay to
Covance Inc. any such expenses theretofore paid or advanced by Covance Inc. if
and to the extent that the party disputing the Participant's rights obtains a
judgment in its favor from a court of competent jurisdiction from which no
appeal may be taken, whether because the time to do so has expired or otherwise,
and it is determined by the court that such expenses were not incurred by the
Participant or the Participant's Claimant while acting in good faith; provided
further, that

               (b) In the case of any claim or dispute initiated by a
Participant or the Participant's Claimant, such claim shall be made, or notice
of such dispute given, with specific reference to the provisions of this Plan,
to the Committee within two years (three years, in the event of a Change in
Control) after the occurrence of the event giving rise to such claim or dispute.

         9.3 Indemnification for Liability. Covance Inc.shall indemnify the
members of the Committee, against any and all claims, losses, damages, expenses
and liabilities arising from their responsibilities in connection with this
Plan, unless the same is determined to be due to gross negligence or willful
misconduct.

         9.4 Claims Procedure. If a claim for benefits or for participation
under this Plan is denied in whole or in part, a Participant will receive
written notification. The notification will include specific reasons for the
denial, specific reference to pertinent

                                       10

<PAGE>



provisions of this Plan, a description of any additional material or information
necessary to process the claim and why such material or information is
necessary, and an explanation of the claims review procedure. If the Committee
fails to respond within 90 days, the claim is treated as denied.

         9.5 Review Procedure. Within 60 days after the claim is denied or, if
the claim is deemed denied, within 150 days after the claim is filed, a
Participant (or his duly authorized representative) may file a written request
with the Committee for a review of his denied claim. The Participant may review
pertinent documents that were used in processing his claim, submit pertinent
documents, and address issues and comments in writing to the Committee. The
Committee will notify the Participant of its final decision in writing. In its
response, the Committee will explain the reason for the decision, with specific
references to pertinent Plan provisions on which the decision was based. If the
Committee fails to respond to the request for review within 60 days, the review
is treated as denied.

                                    ARTICLE X
                            MISCELLANEOUS PROVISIONS

         10.1 Right of Covance Inc. to Take Employment Actions. The adoption and
maintenance of this Supplemental Executive Retirement Plan shall not be deemed
to constitute a contract between Covance Inc. and any eligible Participant, nor
to be a consideration for, nor an inducement or condition of, the employment of
any person. Nothing herein contained, or any action taken hereunder, shall be
deemed to give any eligible Participant the right to be retained in the employ
of Covance Inc. or to interfere with the right of Covance Inc. to discharge any
eligible Participant at any time, nor shall it be deemed to give to an Employer
the right to require the eligible Participant to remain in its employ, nor shall
it interfere with the eligible Participant's right to terminate his or her
employment at any time. Nothing in this Plan shall prevent Covance Inc. from
amending, modifying, or terminating any other Covance Inc. benefit plan.

         10.2 Alienation or Assignment of Benefits. A Participant's rights and
interest

                                       11

<PAGE>


under the Supplemental Executive Retirement Plan shall not be assigned or
transferred except as otherwise provided herein, and the Participant's rights to
benefit payments under the Supplemental Executive Retirement Plan shall not be
subject to alienation, pledge or garnishment by or on behalf of creditors
(including heirs, beneficiaries, or dependents) of the Participant or of a
Beneficiary. Notwithstanding the preceding, the Committee may direct
distributions to an alternate payee pursuant to a Qualified Domestic Relations
Order (QDRO), as defined in Section 414(p) of the Code prior to any distribution
date described in Article IV.

         10.3 Applicable Law. This Plan shall be construed and enforced in
accordance with the laws of Delaware except to the extent superseded by the
Employee Retirement Income Security Act of 1974, as amended.

         10.4 Number and Gender. Whenever any words used herein are in the
singular form, they shall be construed as though they were also used in the
plural form in all cases where they would so apply, and references to the male
gender shall be construed as applicable to the female gender where applicable,
and vice versa.

         10.5 Accelerated Distributions. In the event Federal income is
accelerated on the value of future prospective benefits due to a determination
by the Internal Revenue Service, the Participant may at his election receive an
immediate distribution of the amount necessary to pay the tax obligation due
currently. The Participant's Accrued Benefit under the Plan will be reduced to
reflect the accelerated distribution.


                                       12






                                  COVANCE INC.

                              RESTRICTED STOCK PLAN

                           FOR NON-EMPLOYEE DIRECTORS

1. Purpose
   -------

   The Restricted Stock Plan for Non-Employee Directors (the "Plan") is to be a
   part of the compensation paid by Covance Inc. (the "Corporation") for service
   as a director to individuals who are not employees of (i) the Corporation,
   (ii) any subsidiary corporation of the Corporation within the meaning of
   Section 425 (f) of the Internal Revenue Code of 1986, as amended (the "Code")
   or of any successor section (a "Subsidiary") or (iii) any other entity in
   which he Corporation has at least one half of the ownership interest (such
   persons being referred to herein as "Non-Employee Directors". The Plan is
   intended to increase the proprietary interest of the Non-Employee Directors,
   as owners of additional shares of the common stock of the Corporation, in the
   Corporation's success and progress.

2. Administration
   --------------

   The Plan shall be administered by the Committee of the Board of Directors of
   the Corporation, which shall consist of at least three directors who together
   shall have the authority to adopt rules and regulations for carrying out the
   Plan and to interpret, construe and implement the provisions of the Plan. The
   Committee may obtain such advice or assistance as it deems appropriate from
   persons not serving on the committee.

3. Eligibility
   -----------

   Any Director of Covance Inc. (the "Company") who is not an officer or
   employee of the Company or a subsidiary thereof is eligible to participate in
   the Plan.


                                      -1-

<PAGE>

4. Restricted Stock
   ----------------

   The stock subject to grant under the Plan shall be limited to shares of the
   Corporation's Common Stock, from the authorized and unissued Covance Board
   approved pool of 105,000 of Covance Inc. Common Stock.

5. Recapitalization
   ----------------

   The number of units in the participant's market value account shall be
   proportionally adjusted for any increase or decrease in the number of issued
   shares of Common Stock of the Company resulting from a subdivision or
   consolidation of shares or other capital adjustment, or the payment of a
   stock dividend or other increase or decrease in such shares effected without
   receipt of consideration by the Company, or any distribution or spin-off of
   assets (other than cash) to the stockholders of the Company.

6. Terms of Grant
   --------------

   a) Issuance - Each individual upon becoming a Non-Employee Director, and
      eligible to participate in the Plan pursuant to Section 3 hereof, shall be
      issued by the Corporation one or more certificates representing in the
      aggregate Two Thousand (2,000) shares of the Common Stock of the
      Corporation, which shares shall be issued and subject to the provisions of
      the Plan. Each individual shall be issued by the Corporation one or more
      certificates representing in aggregate two hundred (200) shares of the
      Common Stock of the Corporation per year of service.

   b) Restrictions on Transfer - All shares granted to a Participant shall be
      subject to restriction on transfer so long as the Participant remains a
      Non-Employee Director and may not be sold, assigned, transferred, pledged
      or otherwise encumbered while the Participant is a Non-Employee Director.

   c) Forfeitability - Except as set forth in the next paragraph, in the event
      the Participant ceases to be a Non-Employee Director of the Corporation
      all shares of Common Stock granted to him under the Plan shall be
      forfeited and all rights of the Participant to such shares shall terminate
      without further obligation on the part of the Corporation; provided
      however, if such cessation is on account of death or medical or health
      reasons which render

                                                                               2
<PAGE>

      the Participant unable to perform the duties and responsibilities owed to
      the Corporation in his capacity as a director, the possibility of
      forfeiture shall lapse in its entirety and all such shares shall be vested
      in him.

   d) Vesting - Shares granted as the initial award of 2,000 Covance common
      shares shall be subject to the possibility of forfeiture until the date on
      which the Participant terminates service as a Non-Employee Director with
      the affirmative consent of a majority of the members of the Board of
      Directors, which consent (i) shall be given upon such termination of
      service following the Participant's having reached age 72 and (ii) may be
      given following the Participant's having completed six years (cliff
      vesting) of service as a Non-Employee Director (including service as such
      prior to the date of initial grant) and having terminated service for
      reasons or under circumstances approved by a majority of the Compensation
      Committee. If a Participant terminates service as a Non-Employee Director
      prior to meeting the requirements set forth in the preceding sentence, the
      Board of Directors may, in its sole discretion, remove the restrictions on
      transfer and the possibility of forfeiture from such number of shares held
      by the Participant under the Plan as it determines is equitable; provided,
      however, such number shall not exceed an amount based upon the ratio that
      the number of years of service as a Non-Employee Director at the time of
      termination (including service prior to the date of initial grant) bears
      to six years (cliff vesting) service as a director.

   e) Certificates - Each certificate representing the shares of Common Stock
      awarded hereunder may be stamped or otherwise imprinted on the face
      thereof with a legend in substantially the following form: "The shares
      represented by this certificate have not been registered under the
      Securities Act of 1933. This certificate and the shares represented hereby
      are subject to the possibility of forfeiture under, and may be sold,
      transferred, or otherwise disposed of only in accordance with, the terms
      of the Restricted Stock Plan for Non-Employee Directors of Covance Inc., a
      copy of which Plan is on file in the office of the Secretary of Covance,
      Princeton, New Jersey.

   f) Possession - Each certificate issued with respect to the shares of Common
      Stock granted pursuant to the Plan shall be registered in the name of the
      Participant but shall be held by the Corporation for safekeeping until

                                                                               3

<PAGE>

      possibility of forfeiture and the restriction on transfer of the shares
      lapse pursuant to the terms of the Plan. After the possibility of
      forfeiture and the transfer restrictions applicable to shares registered
      in the name of a Participant shall have lapsed, the Corporation shall
      deliver to the Participant or to the Participant's beneficiary or estate
      one or more certificates representing the number of shares then vested in
      the Participant and free of restrictions.

7. Amendment of the Plan
   ---------------------

   The Board of Directors may from time to time alter, amend, suspend, or
   discontinue the Plan, except that no alteration or amendment (i) to the
   provisions of Section 6 hereof shall be made more often than once in any
   six-month period and (ii) shall, without the approval of the holders of a
   majority of the outstanding shares of Common Stock of the Corporation
   entitled to vote thereon, provide for the grant of Common Stock from shares
   authorized and unissued.

8. Miscellaneous
   -------------

   a) Nothing in the Plan shall be deemed to create any obligation on the
      part of the Board of Directors to nominate any director for re-election by
      the Corporation's stockholders.

   b) The Corporation shall have the right to require, prior to delivery of
      any shares granted hereunder, payment by the Participant of cash or shares
      of Common Stock of the Corporation to cover such taxes as are required by
      law with respect to the issuance or delivery of such shares.

9. Effective Date and Term of Plan
   -------------------------------

   The Plan shall become effective on 3 December 1996 when approved by the vote
   of the Board of Directors of the Corporation and shall continue until
   terminated by such Board.

                                                                               4







                                  COVANCE INC.

                           DEFERRED COMPENSATION PLAN
                                  FOR DIRECTORS

                           Effective December 3, 1996
                 -----------------------------------------------


Section 1. Effective Date
- -------------------------

The effective date of the Plan is December 3, 1996.

Section 2. Eligibility
- ----------------------

Any Director of Covance Inc. (the "Company") who is not an officer or employee
of the Company or a subsidiary thereof is eligible to participate in the Plan.

Section 3. Deferred Compensation Accounts
- -----------------------------------------

There shall be established for each participant a deferred compensation account
or accounts in the participant's name.

Section 4. Amount of Deferral
- -----------------------------

A participant may elect to defer receipt for any year of either (a) all of the
compensation payable to the participant for serving on the Board of Directors of
the Company and Committees of the Board of Directors or (b) only the retainer
(basic annual fee) payable to the participant for membership on such Board.

Section 5. Investment of Deferred Amounts
- -----------------------------------------

(a)  General. A participant may designate, in increments of 10%, the
     compensation to be deferred or compensation already deferred to be
     allocated to a cash account and a market value account or any combination
     of such accounts. Any change in such designation may be made no later than
     the 15th day of each March, June, September and December during the
     deferral period to be effective on the date next following such
     notification that compensation would have been paid in accordance with the
     Company's normal practice but for the election to defer.


<PAGE>

                                      -2-

(b)  Cash Account. The amount, if any, in the participant's deferred
     compensation cash account shall be credited with interest, to be compounded
     quarterly, calculated prospectively at a rate equal to the prime rate in
     effect on the date compensation would have been paid in accordance with
     such practice on the first day of each January, April, July and October
     during the deferral period.

(c)  Market Value Account. The amount, if any, in or allocated to the
     participant's deferred compensation market value account on each date
     compensation would have been paid in accordance with the Company's normal
     practice but for the election to defer shall be expressed in units, the
     number of which shall be equal to such amount divided by the closing price
     of shares of the Company's Common Stock on the New York Stock Exchange
     (hereinafter referred to as "Market Value") on such date or on the trading
     day next preceding such date if such date is not a trading day. On each
     date that the Company pays a regular cash dividend on shares of its Common
     Stock outstanding, the participant's account shall be credited with a
     number of units equal to the amount of such dividend per share multiplied
     by the number of units in the participant's account on such date divided
     by the Market Value on such dividend date or on the trading day next
     preceding such date if the dividend payment date is not a trading day. The
     value of the units in the participant's market value account on any given
     date shall be determined by reference to the Market Value on such date.

(d)  Recapitalization. The number of units in the participant's market value
     account shall be proportionally adjusted for any increase or decrease in
     the number of issued shares of Common Stock of the Company resulting from
     a subdivision or consolidation of shares or other capital adjustment, or
     the payment of a stock dividend or other increase or decrease in such
     shares effected without receipt of consideration by the Company, or any
     distribution or spin-off of assets (other than cash) to the stockholders
     of the Company.

Section 6. Period of Deferral
- -----------------------------

A participant may elect to defer receipt of compensation either (a) until a
specified year in the future or (b) until the participant's termination of
service as a Director of the Company. If alternative (a) is elected, actual
payment will be made or will commence within sixty days after the beginning of
the year specified. If alternative (b) is elected, payment will be made or will
commence within sixty days after termination of services as a Director of the
Company.


<PAGE>

                                      -3-

Section 7. Form of Payment
- --------------------------

A participant may elect to receive the compensation deferred under the Plan in
either (a) a lump sum or (b) a number of annual installments as specified by the
participants. All amounts in the participant's cash and market value accounts
shall be paid in cash.

Section 8. Death or Disability Prior to Receipt
- -----------------------------------------------

In the event that a participant dies or becomes totally and permanently disabled
prior to receipt of any or all of the amounts payable to the participant
pursuant to the Plan, any amounts remaining in the participant's deferred
compensation account may be paid to his estate or personal representative in a
lump sum within sixty (60) days following the Company's notification of the
participant's death or disability.

Section 9. Time of Election of Deferral
- ---------------------------------------

Effective January 1, 1997 the period commencing January 1 and ending December 31
of each year shall be the Plan Year.

An election to defer compensation may be made by a nominee for election as a
Director prior to, or concurrently with the nominee's election for, the term for
which the nominee is being elected, and may be made by a person then currently
serving as a Director for the next succeeding Plan Year no later than the
preceding December 31st.

Section 10. Manner of Electing Deferral
- ---------------------------------------

A participant may elect to defer compensation by giving written notice to the
Secretary of the Company on a form provided by the Company, which notice shall
include the amount to be deferred, the accounts to which such amounts are to be
allocated and the percentage (in increments of 10%) of such amounts to be
allocated to each account, the period of deferral, and the form of payment,
including the number of installments.

Section 11. Effect of Election
- ------------------------------

An election to defer compensation shall be irrevocable once the Plan Year to
which it applies has commenced, and may be revoked or modified only upon
demonstration of substantial and prolonged hardship and with the concurrence of
the Compensation Committee of the Board of the Company. An election covering
more than one Plan Year may be revoked or modified with respect to Plan Years
not yet begun by notifying the Secretary of the Company in writing at least
fifteen (15) days prior to the commencement of such Plan Year.


<PAGE>

                                      -4-

Section 12. Participant's Rights Unsecured
- ------------------------------------------

The right of any participant to receive future payments under the provisions of
the Plan shall be an unsecured claim against the general assets of the Company.

Section 13. Statement of Accounts
- ---------------------------------

Statements will be sent to each participant each year as to the value of the
participant's deferred compensation accounts as of the end of the preceding
December.

Section 14. Assignability
- ------------------------

No right to receive payments hereunder shall be transferable or assignable by a
participant, except by will or by the laws of descent and distribution. The
participant may not sell, assign, transfer, pledge or otherwise encumber any
interest in the participant's deferred compensation account and any attempt to
do so shall be void against, and shall not be recognized by, the Company.

Section 15. Administration
- --------------------------

The Compensation Committee of the Board will determine the plan administrator,
who together shall have the authority to adopt rules and regulations for
carrying out the Plan and interpret, construe and implement the provisions of
the Plan.

Section 16. Amendment
- ---------------------

The Plan may at any time or from time to time be amended, modified or terminated
by the Company. No amendment, modification or termination shall, without the
consent of the participant, adversely affect accruals in such participant's
deferred compensation account.




                                     FORM OF
                           EXECUTIVE EMPLOYMENT LETTER


[Date]


[Name]
[Address]
[Address]
[Address]

         Re:      Employment Letter Agreement (the "Agreement")

Dear __________:

As we move toward  establishing  Covance Inc.  (formerly Corning  Pharmaceutical
Services Inc.)  ("Covance") as an independent  publicly owned company,  it is my
pleasure to formally  confirm that you are an important  member of my management
team,  and, as such,  I would like to  communicate  to you certain  compensation
matters which will be part of the executive  policies  which govern Covance once
the  impending  spin-off  from  Corning  Incorporated  ("Corning")  and  Corning
Clinical  Laboratories  ("CCL") is completed.  The terms and  conditions of this
letter  supersede  and replace any and all previous  offer  letters,  employment
agreements or oral representations  regarding employment made to you (other than
any confidentiality or non-competition  agreements you have signed,  which shall
continue  in full  force and  effect and in  addition  to any of the  provisions
contained in this Agreement).

Position

As a Corporate Senior Vice President of Covance and Group President of Covance's
__________________________________, your duties include managing the ___________
___________________________________________________________________________, and
such  other  duties  as  may be  incidental  to the  foregoing  or as the  Chief
Executive  Officer of Covance (the "CEO") or his designee may assign to you. You
will report to the CEO or his designee.

Salary and Bonus

Your 1997  salary will be  $___________  per year  effective  at the time of the
completion  of the  spin-off  of  Covance  from  Corning  and CCL  described  in
Covance's  Form 10 dated  September 20, 1996 and filed with the  Securities  and
Exchange  Commission (the  "Spin-Off").  Your next scheduled merit increase will
occur on January 1, 1998.


<PAGE>






You will participate in the Covance 1997  Compensation  Plan (the "Bonus Plan").
The Bonus Plan provides that upon  satisfaction  of certain  financial goals for
both  Covance  and  your  business  unit  established  by the  Covance  Board of
Directors,  you shall  receive an annual  incentive  equal to 55% of your annual
base salary at the time the goals are set for such year; provided, however, that
your payout,  if any, under the Bonus Plan for 1997 shall be computed using your
salary  specified  above.  The Bonus Plan also  provides that you may earn up to
110% of your then  current  annual base salary for such year if Covance and your
business unit have outstanding results, again as determined by the Covance Board
of Directors.  Any annual incentive compensation in excess of 55% of your annual
base  salary may be paid to you in stock  options as  determined  by the Covance
Board of  Directors,  the details of which would be  specified in a Stock Option
Agreement to be entered into pursuant to Covance's Employee Equity Participation
Program.  Actual  awards will be  determined  by the Covance  Board of Directors
after  the end of the  applicable  performance  year  and  shall  be paid to you
shortly  thereafter.  The annual  incentive  targets may be  increased,  but not
decreased, while you are employed by Covance.

Pension Plan

[You are not vested in any pension  benefit  under  Corning's  pension.]  In its
place, a supplemental  executive retirement plan ("SERP") is being developed for
the senior executives of Covance in which you will participate. The SERP will be
a  non-qualified,  unfunded  retirement  plan  designed  to  provide  retirement
benefits  to you  starting  at age 60  with  provisions  enabling  you to  begin
receiving  reduced  benefits it you retire at age 55. A copy of the plan will be
sent you as soon as it is approved and available.

Investment and Benefit Plans

All of your  current  Covance  employee  benefit  plans  (other than those plans
offering  Corning  equities,  such as the  Employee  Stock  Purchase  Plan) will
continue in effect after the Spin-Off with such  modifications  as Covance deems
necessary or advisable. You will continue to be eligible to participate in these
Covance plans (e.g., medical, dental, disability, life insurance, 401(k) savings
plan,  ESOP,  employee  stock  purchase  plan) in accordance  with the terms and
conditions of those plans.

Auto and Financial Counseling Allowance

You will continue to receive a gross monthly auto allowance of $1,070 per month.
In  addition,  you will also be eligible  to  participate  in other  perquisites
and/or  benefits  programs  as are  offered to all other  senior  executives  of
Covance as a class. These include a tax/financial counseling allowance of $6,000
per year under the terms of the Covance  plan.  Any expenses  actually  incurred
under this plan will be grossed up for tax purposes at an incremental income tax
rate of 45%.



                                       2
<PAGE>






Existing Options and Other Long Term Incentives

At the time of the Spin-Off,  your existing Corning long-term  incentives (stock
options  and  restricted  stock)  will be treated in  accordance  with the terms
outlined below:

         [1.     All Corning stock options (other than CPP-6 stock options) will
                 be converted  into Covance stock options.  The conversion  will
                 take place in such a way to preserve the inherent gain you have
                 in the Corning stock  options at the time of the  Spin-Off.  In
                 addition,  all other option terms (e.g. term of option, vesting
                 dates,  ISO  status,  forfeiture  provisions,   etc.)  will  be
                 preserved.  Specific  details  regarding the conversion of your
                 stock options will be provided to you at a later date.

         2.      Two-thirds of the Corning CPP-6 stock options will be converted
                 into Covance stock options (under  conditions  similar to those
                 noted  above).  The  remaining  one-third of your Corning CPP-6
                 stock options will be forfeited and canceled.

         3.      Specific  details  regarding  the  treatment  of  all  of  your
                 outstanding  Corning  restricted shares will be provided to you
                 at a later date.] [Revise as appropriate]

Future Equity Awards

You may be  awarded  from time to time  additional  compensation  (such as stock
options or restricted stock) pursuant to Covance's Employee Equity Participation
Program or any additional or  replacement  incentive  compensation  or long-term
compensation program established by Covance for its senior officers.  Any awards
under such  programs,  except as provided  below,  shall be at such levels or in
such amounts as  Covance's  Board of Directors  deems,  in its sole  discretion,
appropriate for your position and the performance of your duties.

In conjunction with your first year  participation in Covance's  Employee Equity
Participation Program, Covance shall grant to you, on the terms set forth below,
that number of shares of Covance's common stock, subject to certain restrictions
(the "Restricted  Stock"),  and options to purchase  Covance's common stock (the
"Stock  Options"),  that have in the aggregate a present value equal to not less
than $_________  (the "First Grant Value").  The First Grant Value shall consist
of Stock  Options and  Restricted  Stock in the ratio of three Stock Options for
every share of  Restricted  Stock.  Each Stock  Option  shall be worth a present
value  amount  equal to the  product of (i) the fair market  value of  Covance's
common stock and (ii) .33. The fair market value of Covance's common stock shall
be  determined  based on the  weighted  average per share price of each trade of
Covance's  common stock occurring  during normal trading hours of the first five
days of "regular  way" trading after  completion  of the  Spin-Off.  The rights,
obligations and other  conditions of the Restricted  Stock and the Stock Options
shall be as specified in that certain Incentive Stock Agreement and Stock Option
Agreement, in each case between you and Covance.



                                       3
<PAGE>






Severance

Except as  specified  below  under the  paragraph  headed  "Change of  Control",
Covance guarantees that should you be involuntarily terminated for reasons other
than for Cause,  you will  receive  an amount  equal to the sum of (a) two years
base salary  (payable on the normal  payroll  cycle)  determined  at the time of
termination,  and (b) two years of the annual  incentive  bonus  (payable on the
normal  bonus  cycles) in an amount  equal for each such year to the  product of
your base salary in effect at termination and 55% (the sum of (a) and (b) being,
collectively, the "Termination Payments").

"Cause" shall mean (i) your  convictions  of a felony or a  misdemeanor  if such
misdemeanor  involves  moral  turpitude;  (ii) your  committing any act of gross
negligence or intentional  misconduct in the performance or  non-performance  of
your duties as an employee of Covance or its affiliates,  including, any actions
which constitute  sexual harassment under applicable laws, rules or regulations;
(iii) your failure to perform  your duties  assigned for a period of thirty (30)
or more days unless such  failure is caused by an Extended  Disability;  or (iv)
misappropriation of assets, personal dishonesty or intentional misrepresentation
of facts which may cause  Covance or its  affiliates  financial or  reputational
harm.

Should such involuntary termination occur because of an Extended Disability, and
not for any other reason that constitutes  Cause, for 120 consecutive days where
you have not returned to your duties on a full-time  basis after the  expiration
of such 120 day period within 30 days after  written  notice of  termination  is
given to you,  Covance  shall pay to you the  Termination  Payments at the times
specified above.

Extended  Disability  shall (i) mean you are unable,  as a result of a medically
determinable  physical or mental impairment,  to perform the duties and services
of your position, or (ii) have the meaning specified in any disability insurance
policy maintained by Covance, whichever is more favorable to you.

Except as may be  otherwise  provided in  applicable  Covance  compensation  and
benefit plans, Covance shall not be liable for any salary or benefit payments to
you beyond the date of your voluntary termination of employment with Covance. In
the event of a termination of employment for Cause or Extended  Disability,  you
shall not be entitled to any  compensation  or other benefits not already earned
and owing to you on account of your services on the date of such  termination of
employment  except as provided above with respect to a termination  for Extended
Disability.

Medical, dental,  disability and life insurance will be continued, to the extent
they are not otherwise  prohibited  under the  respective  plans,  while you are
receiving the Termination Payments.



                                       4
<PAGE>






Change of Control

Should your  employment be terminated by Covance (for reasons other than Cause),
or should your duties as Corporate  Senior Vice  President be  diminished in any
respect (a "Constructive Termination") (either event being referred to herein as
an  "Event  of  Termination"),  in  each  case  within  12  months  following  a
Change-of-Control (as defined below), you will be entitled to a lump sum payment
equal to the sum of (1) the product of (a) 3 and (b) your base annual  salary in
effect at the time of your  involuntary or Constructive  Termination and (2) the
product of (a) 3 and (b) number that is 55% of your base annual salary in effect
at the time of your involuntary or Constructive  Termination.  Such payment will
be made  within 60 days of your  involuntary  or  Constructive  Termination.  In
addition  to, and as a result of, the  foregoing  (i) all of your stock  options
(including  the Stock  Options),  restricted  stock  (including  the  Restricted
Stock),  deferred compensation and similar benefits which have not become vested
on the date of an Event of  Termination  shall become vested upon such Event and
(ii) you shall be entitled to receive any  payments  calculated  pursuant to the
paragraph headed "Certain Additional Payments by Covance".

For purposes of this Agreement, a Change-of-Control is defined to be:

         (i) any person  (including  as such term is used in  Section  13(d) and
14(d)(2) of the Securities  Exchange Act of 1934) becomes the beneficial  owner,
directly or indirectly,  of Covance's securities representing 20% or more of the
combined voting power of Covance's then outstanding securities; or

         (ii) as a result  of a proxy  contest  or  contests  or other  forms of
contested  shareholder  votes  (in  each  case  either  individually  or in  the
aggregate), a majority of the individuals elected to serve on Covance's Board of
Directors are different then the  individuals  who served on Covance's  Board of
Directors  at any time  within  the two years  prior to such  proxy  contest  or
contests  or other  forms of  contested  shareholder  votes (in each case either
individually or in the aggregate); or

         (iii) Covance shareholders approve a merger, or consolidation (where in
each case Covance is not the survivor thereof), or sale or disposition of all or
substantially  all  of  Covance's  assets  or a  plan  or  partial  or  complete
liquidation; or

         (iv) an offerer (other than Covance)  purchases shares of the Company's
common stock pursuant to a tender or exchange offer for such shares.

Medical, dental,  disability and life insurance will be continued, to the extent
they are not otherwise  prohibited  under the respective  plans,  until you find
other  employment  but  not  longer  than  three  years  from  the  date of your
involuntary or Constructive Termination following a Change-of-Control.




                                       5
<PAGE>







Certain Additional Payments by Covance

         (a) Anything in this Agreement to the contrary notwithstanding,  in the
event it shall be determined that any payment or distribution  by, to or for the
benefit of you,  whether made under this  Agreement or otherwise (a  "Payment"),
would be  subject to the excise  tax  imposed  by Section  4999 of the  Internal
Revenue Code of 1986, as amended (the "Excise Tax"),  then you shall be entitled
to receive an additional  payment (a "Gross-Up  Payment") in an amount such that
after  payment by you of all taxes  (including  any Excise Tax) imposed upon the
Gross-Up  Payment,  you retain an amount of the  Gross-Up  Payment  equal to the
Excise Tax imposed upon the Payments.

         (b) All  determinations  required  to be made under  these  provisions,
including whether a Gross-Up Payment is required and the amount of such Gross-Up
Payment,  shall be made by the  accounting  firm  utilized  by  Covance  for the
preparation of its annual external financial  statements (the "Accounting Firm")
which shall provide  detailed  supporting  calculations  both to Covance and you
within 30 days of the Event of Termination,  if applicable, or such earlier time
as is requested by Covance. The Gross-Up Payment, if any, as determined pursuant
to this Paragraph (b), shall be paid to you within 10 days of the receipt of the
Accounting Firm's determination.  Any determination by the Accounting Firm shall
be binding  upon  Covance and you. If  subsequent  final  determinations  of the
Excise Tax made by the Internal  Revenue Service give rise to additional  Excise
Tax, then additional Gross-Up Payments shall be made by Covance to you within 10
days after the notice is received by Covance of such final determination.

         (c) You shall  notify  Covance in writing of any claim by the  Internal
Revenue  Service that, if successful,  would require the payment by Covance of a
Gross-Up Payment. Such notification shall be given as soon as practicable but no
later than 10 business days after you know of such claim. You shall not pay such
claim prior to the  expiration of the  thirty-day  period  following the date on
which you give such notice to Covance (or such shorter period ending on the date
that any  payment  of taxes  with  respect  to such  claim is due).  If  Covance
notifies you in writing  prior to the  expiration of such period that it desires
to contest such claim, you shall:

                  (i)  give  Covance  any  information  reasonably  requested by
         Covance relating too such claim,

                  (ii)  take such  action in  connection  with  contesting  such
         claims as Covance  shall  reasonably  request  in writing  from time to
         time,  including,  without limitation,  accepting legal  representation
         with respect to such claim by an attorney selected by Covance,

                  (iii)   cooperate   with   Covance  in  good  faith  in  order
         effectively to contest such claim, and

                  (iv) permit Covance to participate in any proceedings relating
         to such claim;




                                       6
<PAGE>



provided,  however,  that Covance shall bear all costs and expenses  incurred in
connection  with such contest and shall  indemnify and hold you harmless,  on an
after-tax  basis,  for any Excise Tax or income tax  imposed as a result of such
contest or  representation  and  payment of costs and  expenses.  Covance  shall
control all proceedings  taken in connection with such contest.  Covance may, at
its sole option,  either  direct you to pay the tax claimed and sue for a refund
or contest the claim in any permissible  manner, and you agree to prosecute such
contest to a determination  before any  administrative  tribunal,  in a court of
initial  jurisdiction  and in one or more  appellate  courts,  as Covance  shall
determine;  provided, however, that if Covance directs you to pay such claim and
sue for a refund,  Covance shall advance the amount of such payment to you on an
interest-free  basis and shall indemnify and hold you harmless,  on an after-tax
basis, from any Excise Tax or income tax imposed with respect to such advance.

         (d) If , after the  receipt  by you of an amount  advanced  by  Covance
pursuant  to  Paragraph  (c),  you become  entitled  to receive  any refund with
respect to such  claim,  you shall  promptly  pay to Covance  the amount of such
refund  (together  with  any  interest  paid or  credited  thereon  after  taxes
applicable  thereto).  If,  after the  receipt by you of an amount  advanced  by
Covance pursuant to Paragraph (c), a final  determination is made that you shall
not be  entitled to any refund with  respect to such  claim,  then such  advance
shall be forgiven  and shall not be required to be repaid and the amount of such
advance shall offset the amount of Gross-Up Payment required to be paid.

Confidentiality

Covance   possesses  and  will  continue  to  possess  trade  secrets  or  other
information which has been created, discovered, developed by or otherwise become
known to Covance,  or in which  property  rights have been assigned or otherwise
conveyed to Covance,  which information has commercial value with respect to the
business  and  operations  of  Covance or the  business  and  operations  of its
subsidiaries  or its  affiliates,  including,  but not limited  to,  information
regarding sales, costs, customers,  employees,  products,  services,  apparatus,
equipment,  processes,  formulae,  marketing,  or the organization,  business or
finances of Covance or its  subsidiaries or its  affiliates,  or any information
you have  reason to know  Covance  would like to treat as  confidential  for any
purpose,  such as  maintaining a competitive  advantage or avoiding  undesirable
publicity, whether or not developed by you ("Confidential Information").  Unless
previously  authorized in writing or instructed in writing by Covance,  you will
not, from and after the date of employment with Covance, directly or indirectly,
use for your own benefit or purposes,  or disclose to, or use for the benefit or
purposes of, anyone other than Covance or its  subsidiaries  or affiliates,  any
Confidential  Information,  unless and until,  and then only to the extent that,
such  Confidential  Information  has (a)  been or  becomes  published,  or is or
becomes  generally  known in the  trade  through  no  fault of you,  or (b) such
information  is made known and  available to you by a third party,  who, by such
disclosure  to you does not  breach  any duty or  obligation  to  Covance or its
subsidiaries or affiliates.

In the event you become  legally  compelled to disclose any of the  Confidential
Information,  you will provide  Covance  with prompt  notice so that Covance may
seek a protective order or other




                                       7
<PAGE>


appropriate   remedy  and/or  waive  compliance  with  the  provisions  of  this
Agreement.  If, in the absence of a protective  order or the receipt of a waiver
hereunder,  you  are  nonetheless  legally  required  to  disclose  Confidential
Information  to any  tribunal or else stand  liable for contempt or suffer other
censure or penalty,  you may  disclose  such  Confidential  Information  to such
tribunal without liability hereunder.

Upon  termination of your employment  with Covance,  you will deliver to Covance
all written  embodiments of the Confidential  Information,  including all notes,
drawings,  records,  reports,  pertaining  to  work  done  by  you  during  your
employment with Covance and all other matters of secret or  confidential  nature
relating to Covance's business.

Non-Competition

You  acknowledge  that the  services  to be  rendered by you to Covance are of a
special and unusual character, with a unique value to Covance, the loss of which
cannot  adequately be compensated by damages or an action at law. In view of the
unique value to Covance of such  services for which you are employed at Covance,
because of the Confidential Information obtained by, or disclosed to you, and as
a material  inducement to Covance to compensate  you as well as provide you with
additional benefits and other good and valuable consideration,  you covenant and
agree that:

         (a) Unless  authorized by Covance's Board of Directors in writing,  you
shall  not,  during  your  employment  with  Covance  and for one year after the
expiration of your employment  with Covance (the "Post  Employment  Term",  your
employment with Covance and the Post Employment Term, being,  collectively,  the
"Period"),  become  employed  by,  become a director,  officer,  shareholder  or
partner of, or to otherwise enter into, conduct, or advise any business, whether
directly or indirectly,  which offers  services or products in the United States
and any other  geographical  regions where Covance,  or its  subsidiaries or its
affiliates,  is then  offering  its  services or products  in  competition  with
services or products sold by Covance,  or its  subsidiaries or its affiliates at
any time  during  the  Period in the United  States or such  region,  including,
without limitation,  the conduct of contract pre-clinical  toxicology laboratory
services,  contract  biopharmaceutical  clinical laboratory  services,  contract
bioprocessing or manufacturing services, contract drug packaging services, Phase
I, II, III or IV  clinical  studies or outcomes  or disease  management  studies
(collectively,  the "Covance Services"); provided that you shall not be bound by
the  restrictions  contained in this  provision (a) unless  Covance has made all
payments to you which are due and owing to you under this  Agreement or any plan
or bonus or incentive plan of Covance,  including any equity  incentive or bonus
incentive plan of Covance,  or otherwise;  provided,  further,  that if you have
been  dismissed  by Covance for Cause or you have  voluntarily  terminated  your
employment  with Covance for any reason or no reason,  you shall not be bound by
the foregoing  provisions of this paragraph (a) during the Post  Employment Term
unless Covance has made to you the payments  specified above under  "Severance".
Nothing  herein  shall  restrict  you in your  employment  in any  capacity by a
corporation  or  entity  engaged  substantially  in the  manufacture  or sale of
pharmaceuticals,  or any other business  which does not offer Covance  Services.
Ownership of not more than 1% of the issued and outstanding shares of any



                                       8
<PAGE>






class of securities of a  corporation,  the  securities of which are traded on a
national securities exchange or in the over-the-counter  market, shall not cause
you to be deemed a shareholder under this provision.

         (b) During the Period, you shall not, directly or indirectly,  solicit,
divert or accept any business from any customer of Covance,  its subsidiaries or
affiliates  to the  detriment of any of the  foregoing or seek to cause any such
customers  to refrain  from doing  business  with or  patronizing  Covance,  its
subsidiaries or its affiliates.

         (c) During the Period,  you shall not, directly or indirectly,  solicit
or induce for employment any employee of Covance or any of its  subsidiaries  or
affiliates  or  otherwise  encourage  any  employee  of  Covance  or  any of its
subsidiaries  or  affiliates to leave  Covance,  or any of its  subsidiaries  or
affiliates.  For purposes of this Agreement,  advertisements in trade magazines,
use of  executive  search  firms  and  other  conventional  means  of  obtaining
employees shall not be construed as  solicitation,  inducements or encouragement
unless the party  utilizing such  conventional  means  specifically  directs the
efforts at employee(s)  with whom the party may not have contact pursuant to the
terms of this Agreement.

         (d) For purposes of this  Agreement,  the term "directly or indirectly"
shall be construed in its broadest sense and shall include the activities of the
members of your immediate family or any partnership,  or as otherwise  specified
above,  and the term "customer" shall mean any person or entity to which Covance
has sold  services  during  the  one-year  period  prior to the date you  ceased
employment  with  Covance or any  persons  or  entities  targeted  by Covance or
contacted for the purpose of selling such services  during such one-year  period
which you knew about or reasonably should have known about.

Ownership of Know-How, Inventions and Other Intellectual Property

All  the   know-how,   innovations,   inventions,   discoveries,   improvements,
procedures,  programs,  formulae  and  specifications  which have been or may be
either,  directly  or  indirectly,  developed,  conceived  or  made  by  you  in
connection  with your  employment  with Covance,  whether or not in concert with
other  employees or shown or delivered to Covance or any of its  subsidiaries or
its  affiliates,  and whether or not they are  eligible  for patent,  copyright,
trademark,  trade  secret  or other  legal  protection,  shall be the  exclusive
property of Covance and you shall,  at Covance's  request and expense,  promptly
execute any and all documents or instruments  which may be necessary to evidence
such ownership.

Obligations  of this  Agreement  cover any and all  inventions,  discoveries  or
improvements,  directly or  indirectly,  conceived or made by you in  connection
with your employment with Covance prior to the date of this Agreement.

You will  communicate  to  Covance  promptly  and  fully  all  improvements  and
inventions  you make or conceive  (either  solely or jointly with others) during
the period of your employment




                                       9
<PAGE>






with Covance and conceived by you during the Post Employment Term if based on or
related to your employment at Covance.

Patents

You will,  during and after the  Period,  at  Covance's  request and expense but
without additional compensation, assist Covance and its nominees in every proper
way to obtain and to vest in Covance or its  nominees,  title to patents on such
improvements  and  inventions  in all  countries,  by executing all necessary or
desirable documents, including applications for patents and assignments thereof.

Records and Documents

Except in the performance of your duties as an employee of Covance, you will not
at any time or in any  manner  make or cause  to be made any  copies,  pictures,
duplicates,  facsimiles,  or  other  reproductions,  recordings,  abstracts,  or
summaries of any reports, studies, memoranda, correspondence,  manuals, customer
lists,  software,  records,  formulae,  plans,  or other  written,  printed,  or
otherwise  recorded  material  of  any  kind  whatever  belonging  to or in  the
possession of Covance or its  subsidiaries or affiliates,  which may be produced
or  created  by you or  others,  or which may come into your  possession  in the
course of your employment,  or which relate in any manner to the then current or
prospective business of Covance,  its subsidiaries or its affiliates.  You shall
have no right,  title or interest in any such materials,  and you agree that you
have not removed and will not remove such  materials  without the prior  written
consent of Covance or its  subsidiaries or affiliates,  as applicable,  and that
you  will  surrender  all  such  material  to  Covance   immediately  upon  your
termination  or departure  from  Covance,  or at any time prior thereto upon the
request of Covance.

Injunctive Relief

You agree that the remedies available to Covance at law for any breach of any of
your  obligations  under this Agreement may be inadequate,  and you  accordingly
agree and consent that temporary or permanent injunctive relief, and/or an order
of specific  performance,  may be granted in any proceeding which may be brought
to enforce  any  provision  hereof,  without  the  necessity  of proof of actual
damage, in addition to any other remedies available to Covance at law.

Outplacement

In the event you are involuntarily or Constructively Terminated as a result of a
Change-of-Control  or for other reasons that do not  constitute  Cause,  Covance
shall provide for you, at Covance's  cost,  executive  outplacement  support for
one-year following such termination.




                                       10
<PAGE>







Condition Subsequent

This Agreement  shall be null and void and of no force or effect if the Spin-Off
is not consummated.

Release

In the event you are terminated or Constructively  Terminated without Cause, the
obligation of Covance to make to you any or all of the payments  specified under
this Agreement (including,  without limitation,  the Termination Payments or the
payments  specified  under the paragraph  headed  "Change of Control")  shall be
subject  to your  execution  and  delivery  to  Covance of a release in form and
substance reasonably  satisfactory to Covance of all claims,  demands,  suits or
actions, whether in law or at equity, you have or may have relating to or giving
rise from such termination or Constructive Termination.

General

The terms of your  outstanding  housing loan with Covance remain  unchanged.  In
addition,  provisions of employment  relating to health  benefits,  vacation and
reimbursement for business  expenses,  professional  dues, etc. remain unchanged
and will be  administered in accordance  with company  policies,  as they may be
amended,  modified or  supplemented  from time to time.  This Agreement shall be
governed  by and  construed  in  accordance  with the  laws of the  State of New
Jersey.

The  failure  of either  party at any time to require  performance  by the other
party of any  provision  hereof  shall not  affect in any way the full  right to
require such  performance at any time  thereafter,  nor shall a waiver by either
party of a breach  of any  provision  hereof  be taken or held to be a waiver of
future performance under the provision itself.

You hereby  expressly  agree that all of the  covenants  in this  Agreement  are
reasonable  and necessary in order to protect  Covance and its business.  If any
provision  or any part of any  provision of this  Agreement  shall be invalid or
unenforceable  under  applicable law, such part shall be ineffective only to the
extent of such  invalidity or  unenforceability  and shall not affect in any way
the validity or enforceability of the remaining provisions of this Agreement, or
the remaining parts of such provision.

This  Agreement  shall be  binding on and inure to the  benefit  of the  parties
hereto  and  their  heirs,  executors,  legal  representatives,  successors  and
assigns.  Except in the event of a transfer to a successor  corporation or other
entity or affiliate of Covance, neither party shall have the right to assign its
rights or  delegate  its  obligations,  or all or any  portion  of its rights or
interests  under this Agreement  without the prior written  consent of the other
party hereto.

Any notice,  request,  demand, or other  communication  required or permitted by
this Agreement shall be deemed to be properly given if delivered by hand or when
mailed certified, registered or




                                       11
<PAGE>


first class mail or overnight  courier with postage or shipping  charge prepaid,
addressed  to Covance  at 210  Carnegie  Center,  Princeton,  New Jersey  08540,
Attention:  CEO and to you at your address specified above, and all such notices
shall be deemed  effective  at the time of delivery  or at the time  delivery is
refused by the addressee  upon  participation.  The addresses for the purpose of
this  Paragraph may be changed only by giving  written  notice of such change in
the manner provided herein for giving notices.

The captions of the  Paragraphs  herein are inserted as a matter of  convenience
only and in no way define,  limit or describe the scope of this Agreement or any
provisions hereof.

This Agreement  sets forth the entire  agreement and  understanding  between the
parties hereto as to the subject matter  hereof,  and as such  supersedes in its
entirety  any  existing  agreement,  whether  oral or  written,  between you and
Covance,  except as  expressly  otherwise  provided to the  contrary  under this
Agreement.

This  Agreement  may be  amended  only by a  written  instrument  signed by both
parties  hereto making  specific  reference to this Agreement and expressing the
plan or intention to modify it.

Please  indicate your  agreement with the terms and conditions of this Agreement
by signing one copy of this Agreement and returning it to my attention.

Very truly yours,


Christopher A. Kuebler
President and CEO

CAK\JSH\rh

Accepted as of the date first above specified:


By: ___________________________
         [Name]



                                       12





                              TABLE OF CONTENTS 

<TABLE>
<CAPTION>
                                                                                Page 
                                                                                ----- 
<S>                                                                             <C>
THE RELATIONSHIP AMONG CORNING, QUEST DIAGNOSTICS AND COVANCE AFTER THE 
DISTRIBUTIONS                                                                    28 
COVANCE INC. 
  RISK FACTORS                                                                  108 
CAPITALIZATION OF COVANCE                                                       114 
SELECTED HISTORICAL FINANCIAL DATA OF COVANCE                                   115 
PRO FORMA FINANCIAL INFORMATION OF COVANCE                                      117 
MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF 
  OPERATIONS OF COVANCE                                                         122 
BUSINESS OF COVANCE                                                             129 
MANAGEMENT OF COVANCE                                                           147 
SECURITY OWNERSHIP BY CERTAIN BENEFICIAL OWNERS AND MANAGEMENT OF COVANCE       158 
DESCRIPTION OF COVANCE CAPITAL STOCK                                            159 
ANTITAKEOVER EFFECTS OF CERTAIN PROVISIONS OF THE COVANCE CERTIFICATE OF 
   INCORPORATION AND BY-LAWS                                                    162 
DESCRIPTION OF CERTAIN INDEBTEDNESS OF COVANCE                                  166 
LIABILITY AND INDEMNIFICATION OF DIRECTORS AND OFFICERS OF COVANCE              168 
INDEX TO FINANCIAL STATEMENTS                                                   F-1 
</TABLE>

                                      2 
<PAGE>

        THE RELATIONSHIP AMONG CORNING, QUEST DIAGNOSTICS AND COVANCE 
                           AFTER THE DISTRIBUTIONS 

   After the Distributions, Quest Diagnostics Incorporated ("Quest 
Diagnostics") and Covance Inc. ("Covance") will be independent public 
companies and Corning Incorporated ("Corning") will not have any ownership 
interest in either Quest Diagnostics or Covance other than shares of Quest 
Diagnostics' voting cumulative preferred stock. Corning, Quest Diagnostics 
and Covance will enter into certain agreements, summarized below, to provide 
for an orderly transition to the status of three separate independent 
companies, to govern their relationship subsequent to the Distributions and 
to provide for the allocation of tax and certain other liabilities and 
obligations arising from periods prior to the Distributions. Copies of the 
forms of such agreements have been filed as exhibits to the Registration 
Statements of which this Information Statement is a part. The following 
description summarizes the material terms of such agreements, but is 
qualified by reference to the texts of such agreements as filed. 

Transaction Agreement 

   Corning, Quest Diagnostics and Covance will enter into the Transaction 
Agreement (the "Transaction Agreement") providing for, among other things, 
certain conditions precedent to the Distributions, certain corporate 
transactions required to effect the Distributions and other arrangements 
between Corning, Quest Diagnostics and Covance subsequent to the 
Distributions. See "The Distributions--Conditions; Termination." 

   The Transaction Agreement will provide for, among other things, 
assumptions of liabilities and cross- indemnities designed to allocate 
generally, effective as of the Distribution Date, financial responsibility 
for the liabilities arising out of or in connection with (i) the clinical 
laboratory business to Quest Diagnostics and its subsidiaries, (ii) the 
contract research business to Covance and its subsidiaries and (iii) all 
other business conducted by Corning prior to the Distribution Date to Corning 
and its subsidiaries other than Quest Diagnostics and Covance. 

   The Transaction Agreement will provide that Corning, Quest Diagnostics and 
Covance will use their respective commercially reasonable efforts to achieve 
an allocation of consolidated indebtedness of Corning and a capital structure 
that reflects the capital structure after the Distributions of Corning, Quest 
Diagnostics and Covance as contemplated in the discussion under 
"Capitalization of Quest Diagnostics" and "Capitalization of Covance." In 
addition to the specific indemnity described below, Corning, Quest 
Diagnostics and Covance are obligated under the Transaction Agreement to 
indemnify and hold harmless each other in respect of Indemnifiable Losses (as 
defined therein) arising out of or otherwise relating to the management or 
conduct of their respective businesses or the breach of any provision of the 
Transaction Agreement; provided, however, that Quest Diagnostics will have no 
obligation to indemnify or hold harmless Corning in respect of Indemnifiable 
Losses arising out of any governmental claims or investigations described in 
the next paragraph. 

   
   As discussed under "Business of Quest Diagnostics--Government 
Investigations and Related Claims," Quest Diagnostics is subject to several 
governmental investigations. Any amounts paid by Quest Diagnostics to settle 
these investigations, or as a result of a judgment relating to these 
investigations, will be indemnified by Corning under the Transaction 
Agreement. Under the Transaction Agreement Corning will agree to indemnify 
Quest Diagnostics against all monetary penalties, fines or settlements 
arising out of any governmental criminal, civil or administrative 
investigations or claims that have been settled prior to or are pending as of 
the Distribution Date, pursuant to service of subpoena or other notice of 
such investigation to Quest Diagnostics, as well as any qui tam proceeding 
for which a complaint was filed prior to the Distribution Date whether or not 
Quest Diagnostics has been served with such complaint or otherwise been 
notified of the pendency of such action, to the extent that such 
investigations or claims arise out of or are related to alleged violations of 
federal fraud and health care statutes identified in the Transaction 
Agreement by reason of Quest Diagnostics or any company acquired by Quest 
Diagnostics billing any federal program or agency for services rendered to 
beneficiaries of such program or agency. Corning will also indemnify Quest 
Diagnostics for 50% of the aggregate of all judgment or settlement payments 
made by Quest Diagnostics that are in excess of $42.0 million in respect of 
claims by private parties (i.e., nongovernmental parties such as private 
insurers) that relate to indemnified or previously settled governmental 
claims and that allege overbillings by Quest Diagnostics or any existing 
subsidiaries of Quest Diagnostics for services provided prior to the 
Distribution Date; provided, however, such indemnification for private claims 
will terminate five years after the Distribution Date (whether or not 
settled) and will not exceed $25.0 million in the aggregate (reduced by 
certain tax benefits as described below). Quest Diagnostics' aggregate 
reserve with respect to all governmental and private claims, including 
litigation costs, was $215 million at September 30, 1996 and is estimated to 
be reduced to $85 million at the Distribution Date as a result of the payment 
of settled claims, primarily the Damon settlement of $119 million. 
    


                                      28 
<PAGE> 

   Corning will not indemnify Quest Diagnostics against any governmental 
claims that arise after the Distribution Date, even though relating to events 
prior to the Distribution Date, or to any private claims that do not relate 
to the indemnified or previously settled governmental claims or 
investigations or investigations that relate to post- Distribution Date 
billings. Corning will not indemnify Quest Diagnostics against consequential 
or incidental damages relating to the billing claims, including losses of 
revenues and profits as a consequence of any exclusion from participation in 
federal or state health care programs or the fees and expenses of the 
litigation, including attorneys' fees and expenses. All amounts indemnified 
against by Corning for the benefit of Quest Diagnostics will be calculated on 
a net after-tax basis by taking into account any deductions and other tax 
benefits realized by Quest Diagnostics (or a consolidated group of which 
Quest Diagnostics is a member after the Distributions (the "Quest Diagnostics 
Group")) in respect of the underlying settlement, judgment payment, or other 
loss (or portion thereof) indemnified against by Corning generally at the 
time and to the extent such deductions or tax benefits are deemed to reduce 
the tax liability of Quest Diagnostics or the Quest Diagnostics Group under 
the Transaction Agreement. 

   The Transaction Agreement provides that, in the case of any claims for 
which Corning, Quest Diagnostics or Covance are entitled to indemnification, 
the indemnified party will control the defense of any claim unless the 
indemnifying party elects to assume such defense. However, in the case of all 
private claims related to indemnified governmental claims related to alleged 
overbillings, Quest Diagnostics will control the defense. Disputes under the 
Transaction Agreement are subject to binding arbitration. The Transaction 
Agreement will also provide that, except as otherwise set forth therein or in 
any other agreement, all costs or expenses incurred on or prior to the 
Distribution Date in connection with the Distributions will be allocated 
among the parties. Except as set forth in the Transaction Agreement or any 
related agreement, each party shall bear its own costs and expenses incurred 
after the Distribution Date. 

Spin-Off Tax Indemnification Agreements 

   Corning and Quest Diagnostics will enter into a tax indemnification 
agreement (the "Corning/Quest Diagnostics Spin-Off Tax Indemnification 
Agreement") pursuant to which (1) Quest Diagnostics will represent to Corning 
that, to the best of its knowledge, the materials relating to Quest 
Diagnostics submitted to the Internal Revenue Service ("IRS") in connection 
with the request for ruling submitted to the IRS are complete and accurate in 
all material respects, (2) Quest Diagnostics will represent that it has no 
present intention to undertake the transactions described in part (3)(iii) 
hereafter or cease to engage in the active conduct of providing clinical 
laboratory testing services, (3) Quest Diagnostics will covenant and agree 
that for a period of two years following the Distribution Date (the 
"Restricted Period"), (i) Quest Diagnostics will continue to engage in the 
clinical laboratory testing business, (ii) Quest Diagnostics will continue to 
manage and own at least 50% of the assets which it owns directly and 
indirectly immediately after the Distribution Date and (iii) neither Quest 
Diagnostics, nor any related corporation nor any of their respective 
directors, officers or other representatives will undertake, authorize, 
approve, recommend, permit, facilitate, or enter into any contract, or 
consummate any transaction with respect to: (A) the issuance of Quest 
Diagnostics Common Stock (including options and other instruments convertible 
into Quest Diagnostics Common Stock) which would exceed fifty percent (50%) 
of the outstanding shares of Quest Diagnostics Common Stock immediately after 
the Distribution Date; (B) the issuance of any other instrument that would 
constitute equity for federal tax purposes ("Disqualified Quest Diagnostics 
Stock"); (C) the issuance of options and other instruments convertible into 
Disqualified Quest Diagnostics Stock; (D) any repurchases of Quest 
Diagnostics Common Stock, unless such repurchases satisfy certain 
requirements; (E) the dissolution, merger, or complete or partial liquidation 
of Quest Diagnostics or any announcement of such action; or (F) the waiver, 
amendment, termination or modification of any provision of the Quest 
Diagnostics Rights Plan (as defined therein) in connection with, or in order 
to permit or facilitate, any acquisition of Quest Diagnostics Common Stock or 
other equity interest in Quest Diagnostics, and (4) Quest Diagnostics will 
agree to indemnify Corning for Taxes (as defined below) arising from 
violations of (1), (2) or (3) above and for Taxes arising as a result of (A) 
an acquisition of 20% or more of the stock of Quest Diagnostics by a person 
or related persons during the Restricted Period or (B) the commencement of a 
tender or purchase offer by a third party for 20% or more of Quest 
Diagnostics stock. If obligations of Quest Diagnostics under this agreement 
were breached and as a result thereof one or both of the Distributions do not 
qualify for the treatment stated in the ruling Corning requested from the IRS 
(the "IRS Ruling"), Quest Diagnostics would be required to indemnify Corning 
for Taxes imposed and such indemnification obligations could exceed the net 
asset value of Quest Diagnostics at such time. 

   Corning and Covance will enter into a tax indemnification agreement (the 
"Corning/Covance Spin-Off Tax Indemnification Agreement") pursuant to which 
(1) Covance will represent to Corning that to the best of its knowledge, 

                                      29 
<PAGE> 

the materials relating to Covance submitted to the IRS in connection with the 
request for ruling submitted to the IRS are complete and accurate in all 
material respects, (2) Covance will represent that it has no present 
intention to undertake the transactions described in part (3)(iii) hereafter 
or to cease to engage in the active conduct of providing contract research 
services, (3) Covance will covenant and agree that during the Restricted 
Period, (i) Covance will continue to engage in the contract research 
business, (ii) Covance will continue to manage and own at least 50% of the 
assets which it owns directly and indirectly immediately after the 
Distribution Date and (iii) neither Covance, nor any related corporations nor 
any of their respective directors, officers or other representatives will 
undertake, authorize, approve, recommend, permit, facilitate, or enter into 
any contract, or consummate any transaction with respect to: (A) the issuance 
of Covance Common Stock (including options and other instruments convertible 
into Covance Common Stock) which would exceed fifty percent (50%) of the 
outstanding shares of Covance Common Stock immediately after the Distribution 
Date; (B) the issuance of any other instrument that would constitute equity 
for federal tax purposes ("Disqualified Covance Stock"); (C) the issuance of 
options and other instruments convertible into Disqualified Covance Stock; 
(D) any repurchases of Covance Common Stock, unless such repurchases satisfy 
certain requirements; (E) the dissolution, merger, or complete or partial 
liquidation of Covance or any announcement of such action; or (F) the waiver, 
amendment, termination or modification of any provision of the Covance Rights 
Plan (as defined therein) in connection with, or in order to permit or 
facilitate, any acquisition of Covance Common Stock or other equity interest 
in Covance and (4) Covance will agree to indemnify Corning for Taxes arising 
from violations of (1), (2) or (3) above and for Taxes arising as a result of 
(A) an acquisition of 20% or more of the stock of Covance by a person or 
related persons during the Restricted Period or (B) the commencement of a 
tender or purchase offer by a third party for 20% or more of Covance stock. 
If obligations of Covance under this agreement were breached and as a result 
thereof one or both of the Distributions do not qualify for the treatment 
stated in the IRS Ruling, Covance would be required to indemnify Corning for 
Taxes imposed and such indemnification obligations could exceed the net asset 
value of Covance at such time. 

   Quest Diagnostics and Covance will enter into a tax indemnification 
agreement (the "Quest Diagnostics/ Covance Spin-Off Tax Indemnification 
Agreement") which will be essentially the same as the Corning/Covance 
Spin-Off Tax Indemnification Agreement except that Covance will make 
representations to and indemnify Quest Diagnostics as opposed to Corning. If 
obligations of Covance under this agreement were breached and as a result 
thereof one or both of the Distributions do not qualify for the treatment 
stated in the IRS Ruling, Covance would be required to indemnify Quest 
Diagnostics for Taxes imposed and such indemnification obligations could 
exceed the net asset value of Covance at such time. Quest Diagnostics and 
Covance will enter into a second tax indemnification agreement (the 
"Covance/Quest Diagnostics Spin-Off Tax Indemnification Agreement") which 
will be essentially the same as the Corning/Quest Diagnostics Spin-Off Tax 
Indemnification Agreement except that Quest Diagnostics will make 
representations to and indemnify Covance as opposed to Corning. If 
obligations of Quest Diagnostics under this agreement were breached and as a 
result thereof one or both of the Distributions do not qualify for the 
treatment stated in the IRS Ruling, Quest Diagnostics would be required to 
indemnify Covance for Taxes imposed and such indemnification obligations 
could exceed the net asset value of Quest Diagnostics at such time. 

   The Spin-Off Tax Indemnification Agreements will also require (i) Quest 
Diagnostics to take such actions as Corning may reasonably request and (ii) 
Covance to take such actions as Corning and Quest Diagnostics may reasonably 
request to preserve the favorable tax treatment provided for in any rulings 
obtained from the IRS in respect of the Distributions. 

Tax Sharing Agreement 

   Corning, Quest Diagnostics and Covance will enter into a tax sharing 
agreement (the "Tax Sharing Agreement") which will allocate responsibility 
for federal income and various other taxes ("Taxes") among the three 
companies. The Tax Sharing Agreement provides that, except for Taxes arising 
as a result of the failure of either or both of the Distributions to qualify 
for the treatment stated in the IRS Ruling (which Taxes are allocated either 
pursuant to the Spin-Off Tax Indemnification Agreements or as described 
below), Corning is liable for and will pay the federal income taxes of the 
consolidated group that includes Quest Diagnostics and Covance and their 
subsidiaries, provided, however, that Quest Diagnostics and Covance are 
required to reimburse Corning for taxes for periods beginning after December 
31, 1995 in which they are members of the Corning consolidated group and for 
which tax returns have not been filed as of the Distribution Date. This 
reimbursement obligation is based on the hypothetical separate federal tax 
liability of Quest Diagnostics and Covance, including their respective 
subsidiaries, calculated on a separate consolidated basis, subject to certain 
adjustments. Under the Tax Sharing Agreement, in the case of adjustments by a 
taxing authority of a 

                                      30 
<PAGE> 

consolidated federal income tax or certain other tax returns prepared by 
Corning which includes Quest Diagnostics or Covance, then, subject to certain 
exceptions, Corning is liable for and will pay any tax assessments, and is 
entitled to any tax refunds, resulting from such audit. 

   The Tax Sharing Agreement further provides that, if either of the 
Distributions fails to qualify for the tax treatment stated in the IRS Ruling 
(for reasons other than those indemnified against under one or more of the 
Spin-Off Tax Indemnification Agreements), Taxes imposed upon or incurred by 
Corning, Quest Diagnostics or Covance as a result of such failure are to be 
allocated among Corning, Quest Diagnostics and Covance in such a manner as 
will take into account the extent to which the actions or inactions of each 
may have contributed to such failure, and Corning, Quest Diagnostics and 
Covance each will indemnify and hold harmless the other from and against the 
taxes so allocated. If it is determined that none of the companies 
contributed to the failure of such distribution to qualify for the tax 
treatment stated in the IRS Ruling, the liability for taxes will be borne by 
each in proportion to its relative average market capitalization as 
determined by the average closing price for the common stock of each during 
the 20 trading-day period immediately following the Distribution Date. In the 
event that either of the Distributions fails to qualify for the tax treatment 
stated in the IRS Ruling and the liability for taxes as a result of such 
failure is allocated among Corning, Quest Diagnostics and Covance, the 
liability so allocated to Quest Diagnostics or Covance could exceed the net 
asset value of Quest Diagnostics or Covance, respectively. 

Voting Cumulative Preferred Stock of Quest Diagnostics 

   After the Distributions, Corning will retain 1,000 shares of Quest 
Diagnostics' voting cumulative preferred stock, with an aggregate liquidation 
preference of $1.0 million. Corning is the sole holder of such shares. For a 
description of the terms of the Quest Diagnostics voting cumulative preferred 
stock, see "Description of Quest Diagnostics Capital Stock--Voting Cumulative 
Preferred Stock." 

                                      31 
<PAGE> 

                                 COVANCE INC. 

                                 RISK FACTORS 

   Corning shareholders should be aware that the Distributions and ownership 
of the Covance Common Stock involve certain risks, including those described 
below, which could adversely affect the value of their holdings. Neither 
Corning nor Covance makes, nor is any other person authorized to make, any 
representations as to the future market value of Covance Common Stock. 

Risks Relating to the Distributions 

   Effects on Corning Stock. Following the Distributions, Corning Common 
Stock will continue to be listed and traded on the NYSE and certain other 
stock exchanges. As a result of the Distributions, the trading price of 
Corning Common Stock is expected to be correspondingly lower than the trading 
price of Corning Common Stock immediately prior to the Distributions. There 
can be no assurance that the combined trading prices of Corning Common Stock, 
Quest Diagnostics Common Stock and Covance Common Stock after the 
Distributions will be equal to or greater than the trading price of Corning 
Common Stock prior to the Distributions. 

Risks Relating to Covance 

   Financial Impact of the Distributions on Covance. While Covance has a 
substantial operating history, it has not operated as a separate independent 
company. As a Corning subsidiary, Covance has had access to the cash flow 
generated by Corning and to Corning's credit, which is based on the combined 
assets of Corning, which included Quest Diagnostics and Covance. Subsequent 
to the Distributions, Covance will not have the benefit of Corning's cash 
flow or assets. This may impact, among other things, Covance's ability to 
expand, through acquisitions or otherwise, and could thereby have an adverse 
effect on Covance's operating earnings and cash flow. 

   Dependence on and Effect of Government Regulation. Covance's business 
depends on the continued strict government regulation of the drug development 
process, especially in the United States and Europe. Changes in regulation, 
including a relaxation in regulatory requirements or the introduction of 
simplified drug approval procedures, could have a material adverse effect on 
the demand for the services offered by Covance. 

   The failure on the part of Covance to comply with applicable regulations 
could result in the termination of ongoing research or the disqualification 
of data for submission to regulatory authorities. Furthermore, the issuance 
of a notice of finding by the Food and Drug Administration (the "FDA") to 
either Covance or its clients based upon a material violation by Covance of 
Good Clinical Practices ("GCP"), Good Laboratory Practices ("GLP") or Current 
Good Manufacturing Practices ("GMP") requirements could have a material 
adverse effect on Covance. See "Business of Covance--CRO Industry Overview" 
and "Business of Covance--Government Regulation." 

   Fixed Price Nature of Contracts; Loss or Delay of Large Contracts. Most of 
Covance's contracts for the provision of its services are fixed price or 
fee-for-service with a cap. Approximately 75% of Covance's net revenues are 
earned under contracts which generally range in duration from a few months to 
two years. For the fiscal year ended 1995, fixed price and fee-for-service 
contracts with a cap accounted for 65% of contract generated net revenues, 
with fixed price accounting for 40% and fee-for-service with a cap accounting 
for 25% of contract generated net revenues. The balance of the net revenues 
generated under contracts in 1995 were pursuant to fee- for-service contracts 
without a cap. Since Covance's contracts are predominantly structured as 
fixed price or fee- for-service with a cap, Covance bears the risks of cost 
overruns. Underpricing of such contracts or significant cost overruns could 
have a material adverse effect on Covance. 

   Most of Covance's contracts for the provision of its services, including 
contracts with governmental agencies, are terminable by the client 
immediately or upon notice. Contracts may be terminated for a variety of 
reasons, including the failure of products to satisfy safety requirements, 
unexpected or undesired results of the product, the client's decision to 
terminate the development of the product or to forego or end a particular 
study, insufficient patient enrollment or investigator recruitment or 
Covance's failure to properly discharge its obligations thereunder. Although 
the contracts often require payment to Covance of expenses to wind down the 
study and fees earned to date and, in some cases, a termination fee or a 
payment of a portion of the fees or profits that would have been earned under 
the contract if the contract had not been terminated early, the loss of a 
large contract or the loss of 

                                     108 
<PAGE> 

multiple contracts could have a material adverse effect on Covance. See 
"Business of Covance--Contractual Arrangements." 

   Biomanufacturing--New Business Venture. Covance holds a majority interest 
in Covance Biotechnology Services Inc. ("Covance Biotechnology," formerly 
known as Corning Bio Inc.), a majority owned company formed in 1995 to 
manufacture peptides and recombinant proteins for biotechnology and 
pharmaceutical clients in accordance with GMP for preclinical and clinical 
trials as well as for commercial sales and to provide process development 
services. See "Business of Covance--Services--Biomanufacturing." Outsourced 
biomanufacturing is a relatively new industry and as such companies in this 
industry are subject to all of the risks inherent in a new or emerging 
industry, including changes in the regulatory regime, an absence of an 
established earnings history, the availability of adequately trained 
management and employees, and the potential for significant client 
concentration. As a start-up venture, Covance Biotechnology is subject to the 
risks inherent in the establishment of a new business enterprise, including, 
among others, unanticipated construction delays, operational and 
manufacturing problems, additional and unforeseen costs and expenses and 
inability to attract and retain clients. There can be no assurance that, even 
after the expenditure of substantial funds and efforts, Covance Biotechnology 
will be able to market successfully its biomanufacturing services. Covance 
Biotechnology's biomanufacturing facility is still under construction and is 
expected to be "mechanically" completed during the fourth quarter of 1996. 
Mechanical completion occurs when all structural aspects of the facility are 
complete, all mechanical equipment and systems are installed and a 
certificate of occupancy has been issued by an applicable governmental 
authority. After mechanical completion, the facility must be "validated," 
which means that the various equipment, systems and procedures that are 
required to manufacture a biologic must be thoroughly tested and reviewed. 
Although Covance Biotechnology has submitted proposals to a number of 
prospective biopharmaceutical clients, it has been awarded only one contract, 
but has signed a number of letters of intent for the provision of services. 
For the period ended December 31, 1995, Covance Biotechnology reported a net 
loss of approximately $1.9 million, and for the nine months ended September 
30, 1996, Covance Biotechnology reported a net loss of approximately $2.3 
million. 

   The biomanufacturing facility is being financed through several tax 
retention operating leases provided by a commercial lending institution (the 
"Bank") and, during the construction phase, is being leased by a general 
contractor (the "General Contractor"). The leases expire 10 years from the 
date of mechanical completion of the facility. The annual minimum lease 
payments are currently estimated at $5.5 million. At the expiration of the 
lease term, Covance Biotechnology is liable for the unamortized balance of 
the cost of the facility, currently estimated to be $37 million. Covance 
Biotechnology may also choose to purchase the facility at specific dates over 
the 10 year period. Using current estimates, the purchase price would be 
approximately $54 million at the end of the first year, decreasing on an 
amortizing basis to approximately $37 million at the end of the tenth year. 

   Volatility of Quarterly Operating Results. Covance's quarterly operating 
results are subject to volatility due to such factors as the commencement, 
completion or cancellation of large contracts, progress of ongoing contracts, 
acquisitions, the timing of start-up expenses for new offices and changes in 
the mix of services. Since a large percentage of Covance's operating costs 
are relatively fixed, variations in the timing and progress of large 
contracts can materially affect quarterly results. Because a significant 
portion of Covance's revenues are generated by its international operations, 
exchange rate fluctuations may also influence these results. Covance believes 
that comparisons of its quarterly financial results are not necessarily 
meaningful and should not be relied upon as an indication of future 
performance. However, fluctuations in quarterly results could affect the 
market price of the Covance Common Stock in a manner unrelated to the longer 
term operating performance of Covance. See "Management's Discussion and 
Analysis of Financial Condition and Results of Operations of 
Covance--Quarterly Results." 

   Dependence on Certain Industries and Clients. Revenues of Covance are 
highly dependent on research and development expenditures by the 
pharmaceutical and biotechnology industries. Accordingly, Covance's 
operations could be materially and adversely affected by general economic 
downturns in these industries, the impact of the current trend toward 
consolidation in these industries or other factors resulting in a decrease in 
research and development expenditures. Furthermore, Covance has benefitted to 
date from the increasing tendency of pharmaceutical and biotechnology 
companies to outsource both small and large clinical research projects. A 
reversal of this trend could have a material adverse effect on the revenues 
of Covance. 

   Covance believes that concentrations of business in the contract research 
organization ("CRO") industry are not uncommon. Covance has experienced such 
concentration in the past and may experience such concentration in fiscal 
1997 and in future years. No client accounted for 10% or more of Covance's 
net revenues in 1993, 1994 or 1995. None 

                                     109 
<PAGE> 

of Covance's clients accounted for greater than 5% of Covance's net revenues 
in the year ended December 31, 1993. In the years ended December 31, 1994 and 
1995, one client accounted for greater than 5% of Covance's net revenue. In 
fiscal 1993, 1994 and 1995 and the nine months ended September 30, 1996, 
Covance's top five clients accounted for approximately 17%, 20%, 21% and 21%, 
respectively, of Covance's net revenue. The loss of business from a 
significant client or group of clients could have a material adverse effect 
on Covance. See "Business of Covance--Trends Affecting the CRO Industry" and 
"Business of Covance--Clients and Marketing." 

   Competition; CRO Industry Consolidation; Few Barriers to Entry. The CRO 
industry is highly fragmented, with participants ranging from hundreds of 
small, limited-service providers to a few full service CROs with global 
operations. Covance primarily competes against in-house departments of 
pharmaceutical companies, full-service CROs and, to a lesser extent, 
universities and teaching hospitals. CROs compete on the basis of several 
factors, including reputation for on-time quality performance, expertise and 
experience in specific therapeutic areas, scope of service offerings, how 
well such services are integrated, strengths in various geographic markets, 
price, technological expertise and efficient drug development processes, the 
ability to acquire, process, analyze and report data in a time- saving 
accurate manner, the ability to manage large-scale clinical trials both 
domestically and internationally, expertise and experience in health 
economics and size. While Covance has competed effectively in these areas, 
there can be no assurance that Covance will be able to continue to do so. As 
a result of competitive pressures, the CRO industry is consolidating. This 
trend is likely to produce competition among the larger CROs for both clients 
and acquisition candidates and companies may choose to limit the CROs they 
are willing to work with. In addition, there are few barriers to entry for 
small, limited-service entities considering entering the CRO industry. These 
entities may compete against larger CROs for clients. Furthermore, the CRO 
industry has attracted the attention of the investment community, which could 
lead to increased competition by increasing the availability of financial 
resources for CROs. Increased competition may lead to price and other forms 
of competition that could have a material adverse effect on the results of 
operations of Covance. See "Business of Covance--Competition." 

   
   Potential Liability. In connection with many clinical trials, Covance 
contracts with physicians, also referred to as investigators, to conduct the 
clinical trials to test new drugs on human volunteers. Such testing creates 
risk of liability for personal injury or death to volunteers, particularly to 
volunteers with life-threatening illnesses, resulting from adverse reactions 
to the drugs administered. Although Covance does not believe it is legally 
accountable for the medical care rendered by third-party investigators, it is 
possible that Covance could be held liable for the claims and expenses 
arising from any professional malpractice of the investigators with which it 
contracts or in the event of personal injury or death of persons 
participating in clinical trials. Covance also could be held liable for 
errors or omissions in connection with the services it performs that result 
in harm that arises either during or after a trial to study volunteers or 
consumers of the drug in the general marketplace subsequent to regulatory 
approval of the drug. For instance, improper storage, packaging or 
manufacturing of a compound could lead to its adulteration. In addition, 
Covance could be liable for the general risks associated with its Phase I 
facility including, but not limited to, adverse events resulting from the 
administration of drugs to clinical trial participants or the professional 
malpractice of Phase I medical care providers. Further, Covance could be held 
liable for harm to study volunteers or consumers of an approved drug for 
testing errors or omissions by either its preclinical or central 
laboratories. Moreover, because Covance's preclinical laboratories also 
conduct tests for the agrochemical and food industries, Covance could be held 
liable for errors or omissions that result in unsafe products entering the 
marketplace. Finally, although Covance's animal breeding facilities maintain 
procedures in accordance with applicable government regulations and the 
preventive measures contained in its company policies for the quarantine and 
handling of imported animals, including primates, there is a risk that these 
animals may be infected with diseases that may be harmful and even lethal to 
themselves and humans. Covance believes that as a result of its extensive 
preventive procedures and compliance with the quarantine procedures of the 
Center for Disease Control, there are no material risks of widespread harm to 
humans through exposure to such diseases. However, if any humans should 
become infected, Covance may be subject to claims by employees, or persons 
who come in contact with employees, who were exposed to such infectious 
diseases. In 1996 Covance, with the approval of the Texas Department of 
Health and the Centers for Disease Control, destroyed a shipment of monkeys 
from the Philippines because some had been infected with a substrain of the 
Ebola-Reston virus, which is lethal to monkeys. Covance does not believe that 
it will have any liability resulting from such incident because all of 
Covance's employees who may have had any exposure to the monkeys who may have 
been infected by the virus were carefully monitored and have shown no sign of 
unexplained illness. 
    

   Covance believes that its risks are generally reduced by contractual 
indemnification provisions with clients and, where applicable, investigators 
(the scope of which varies from client to client and the performance of which 

                                     110 
<PAGE> 

are not secured); insurance maintained by clients and, where applicable, 
investigators and by Covance; and various regulatory requirements, including 
the use of institutional review boards in the clinical area and the 
procurement of each volunteer's informed consent to participate in the 
clinical study. The contractual indemnifications generally do not protect 
Covance against liability arising from certain of its own actions such as 
negligence. Covance could be materially and adversely affected if it were 
required to pay damages or bear the costs of defending any claim outside the 
scope of or in excess of a contractual indemnification provision or beyond 
the level of insurance coverage or in the event that an indemnifying party 
does not fulfill its indemnification obligations. There can be no assurance 
that Covance will be able to maintain such insurance coverage on terms 
acceptable to Covance. 

   Risks Associated with Acquisitions; Integration of Acquired 
Operations. During the last three fiscal years Covance completed three 
acquisitions. Covance reviews many acquisition candidates in the ordinary 
course of business and, in addition to acquisitions already made, Covance is 
continually evaluating new acquisition opportunities. Acquisitions involve 
numerous risks, including, among other things, difficulties and expenses 
incurred in connection with the acquisitions and the subsequent assimilation 
of the operations and services or products of the acquired companies, the 
diversion of management's attention from other business concerns and the 
potential loss of key employees of the acquired company. Acquisitions of 
foreign companies also may involve the additional risks of assimilating 
differences in foreign business practices and overcoming language and other 
cultural barriers. In the event that the operations of an acquired business 
do not perform as expected, Covance may be required to restructure the 
acquired business or write off the value of some or all of the assets of the 
acquired business. Further, to the extent that any future acquisitions are 
effected through the issuance of stock to the shareholders of the acquired 
company, the interest of shareholders holding shares of Covance prior to the 
acquisition could be diluted. There can be no assurance that acquisition 
candidates will be available on terms and conditions acceptable to Covance 
or, despite Covance's success with prior acquisitions, that any past or 
future acquisition will be successfully integrated into Covance's operations, 
or that they will contribute favorably to Covance's results of operations or 
financial condition. See "Management's Discussion and Analysis of Financial 
Condition and Results of Operations of Covance." 

   Potential Adverse Impact of Health Care Reform. The health care industry 
is subject to changing political, economic and regulatory influences that may 
affect the pharmaceutical and biotechnology industries. During 1994, several 
comprehensive health care reform proposals were introduced in Congress. The 
intent of the proposals was, generally, to expand health care coverage for 
the uninsured and reduce the growth of total health care expenditures. While 
none of the proposals was adopted, health care reform may again be addressed 
by Congress, and there have been efforts recently to enact less comprehensive 
reform bills. Similar reform movements have occurred in Europe and Asia. 
Implementation of government health care reform may adversely affect research 
and development expenditures by pharmaceutical and biotechnology companies 
which could decrease the business opportunities available to Covance in the 
United States and abroad. Covance is unable to predict the likelihood of such 
or similar legislation being enacted into law or the effects such legislation 
would have on Covance. 

   Loss of Brand Names. In connection with the Covance Spin-Off Distribution, 
Covance will change the trade names under which it conducts its business. 
Covance believes that its business has benefitted from the use of the 
"Corning," "Besselaar," "SciCor," "Hazleton," "PACT," "HTA," "National 
Packaging," "CRS Pacamed" and "HRP" brand names. The impact of the change in 
trade names on Covance's business and operations cannot be fully predicted. 

   
   Absence of Dividends; Restrictions on Dividends Imposed by the Covance 
Credit Facility. It is currently contemplated that, following the 
Distributions, Covance will not pay cash dividends in the foreseeable future, 
but will retain earnings to provide funds for the operation and expansion of 
its business. In addition, the Covance Credit Facility prohibits Covance from 
paying cash dividends on the Covance Common Stock during a Default or an 
Event of Default, or if after giving effect to the payment of such dividends 
Covance would not be in compliance with the financial covenants contained 
therein. See "Description of Covance Capital Stock--Covance Common Stock-- 
Dividend Policy," "Management's Discussion and Analysis of Financial 
Condition and Results of Operations of Covance--Liquidity and Capital 
Resources" and "Description of Certain Indebtedness of Covance." 
    

   Potential Liability under the Spin-Off Tax Indemnification 
Agreements. Covance will enter into the Corning/ Covance Spin-Off Tax 
Indemnification Agreement that will prohibit Covance for a period of two 
years after the Distribution Date from taking certain actions, including a 
sale of 50% or more of the assets of Covance or engaging in certain equity or 
financing transactions, that might jeopardize the favorable tax treatment of 
the Distributions under Code section 355 and will provide Corning with 
certain rights of indemnification against Covance. Covance 

                                     111 
<PAGE> 

may also have indemnification obligations under the Spin-Off Tax 
Indemnification Agreements in the case of the acquisition of, or tender or 
purchase offer by another person for, 20% or more of the outstanding Covance 
Common Stock. The Corning/Covance Spin-Off Tax Indemnification Agreement will 
also require Covance to take such actions as Corning may reasonably request 
to preserve the favorable tax treatment provided for in any rulings obtained 
from the IRS in respect of the Distributions. Covance will also enter into 
the Quest Diagnostics/Covance Spin-Off Tax Indemnification Agreement that 
will prohibit Covance for a period of two years after the Distribution Date 
from taking certain actions, including a sale of 50% or more of the assets of 
Covance or engaging in certain equity or financing transactions, that might 
jeopardize the favorable tax treatment of the Covance Spin-Off Distribution 
under Code section 355 and will provide Quest Diagnostics with certain rights 
of indemnification against Covance. The Quest Diagnostics/Covance Spin-Off 
Tax Indemnification Agreement will also require Covance to take such actions 
as Quest Diagnostics may reasonably request to preserve the favorable tax 
treatment provided for in any rulings obtained from the IRS in respect of the 
Distributions. If obligations of Covance under either the Corning/Covance 
Spin-Off Tax Indemnification Agreement or the Quest Diagnostics/Covance 
Spin-Off Tax Indemnification Agreement were breached and primarily as a 
result thereof either of the Distributions do not receive favorable tax 
treatment under Code section 355, Covance would be required to indemnify 
Corning and Quest Diagnostics for Taxes imposed and such indemnification 
obligations could exceed the net asset value of Covance at such time. See 
"The Relationship Among Corning, Quest Diagnostics and Covance After the 
Distributions-- Spin-Off Tax Indemnification Agreements." 

   Potential Adverse Effect of Exchange Rate Fluctuations on 
Results. Approximately 22%, 24% and 30% of Covance's net revenues for the 
years ended December 31, 1993, 1994, and 1995, respectively, were derived 
from Covance's operations outside of the United States. Contracts between 
Covance's foreign subsidiaries and its clients are frequently denominated in 
currencies other than the applicable subsidiary's local currency. 
Accordingly, payments received for services rendered under such contracts are 
denominated in a currency different than the currency used for the payment of 
the subsidiary's expenses. Therefore, the subsidiary's net revenues, expenses 
and earnings are affected by fluctuations in exchange rates. To the extent 
Covance is unable to shift to its clients the effects of currency 
fluctuations, these fluctuations could have a material adverse effect on 
Covance's results of operations. Covance does not currently hedge against the 
risk of exchange rate fluctuations. In addition, Covance's combined financial 
statements are denominated in U.S. dollars, and, accordingly, changes in 
exchange rates between the applicable foreign currency and the U.S. dollar 
will affect the translation of such subsidiary's financial results into U.S. 
dollars for purposes of reporting Covance's combined financial results. 

   Absence of a Prior Public Market. Prior to the Distributions, there has 
been no public market for the Covance Common Stock. Although it is expected 
that the Covance Common Stock will be approved for listing on the NYSE, there 
is no existing market for the Covance Common Stock and there can be no 
assurance as to the liquidity of any markets that may develop, the ability of 
Covance stockholders to sell their shares of Covance Common Stock or at what 
price Covance stockholders will be able to sell their shares of Covance 
Common Stock. Future trading prices will depend on many factors including, 
among other things, prevailing interest rates, Covance's operating results 
and the market for similar securities. 

   Potential Volatility of Stock Price. The market price of Covance Common 
Stock could be subject to wide fluctuations in response to quarter-to-quarter 
variations in operating results, changes in earnings estimates by analysts, 
market conditions in the contract research industry, prospects for health 
care reform, changes in government regulation and general economic 
conditions. In addition, the stock market has from time to time experienced 
significant price and volume fluctuations that have been unrelated to the 
operating performance of particular companies. Moreover, Covance Common Stock 
could be subject to wide fluctuations for some time after the Distributions 
as a result of heavy trading volume stemming from sales by shareholders of 
Corning Common Stock who decide not to continue owning Covance Common Stock. 
Certain of such sales may include those to be made on behalf of investment 
plans maintained for the benefit of Corning employees. These plans currently 
hold slightly less than 5% of the outstanding Corning Common Stock and, as a 
result of the Distributions, are expected to hold a similar percentage of the 
Covance Common Stock. From time to time as market conditions warrant, and as 
the administrator of the plans believes to be in the best interests of the 
employee beneficiaries, the administrator will sell all of the Covance Common 
Stock held by the plans. Such sales are expected to occur within a period of 
three years after the Distribution Date. See "Security Ownership by Certain 
Beneficial Owners and Management of Covance." These market fluctuations could 
have an adverse effect on the market price of Covance Common Stock. Covance 
stockholders should be aware, and must be willing to bear the risk, of such 
fluctuations in earnings and stock price. 

                                     112 
<PAGE> 

   Dependence on Key Employees. Covance's affairs are managed by a small 
number of key management personnel, the loss of any of whom could have an 
adverse impact on Covance. Covance has separation agreements with such 
persons. There can be no assurance that Covance can retain its key managerial 
and technical employees or that it can attract, assimilate or retain other 
skilled technical personnel in the future. See "Management of Covance." 

   Certain Antitakeover Effects. Covance's amended and restated certificate 
of incorporation (the "Covance Certificate") and by-laws (the "Covance 
By-Laws"), and the Delaware General Corporation Law ("DGCL"), contain several 
provisions that could have the effect of delaying, deferring or preventing a 
change in control of Covance in a transaction not approved by the board of 
directors of Covance (the "Covance Board"), or, in certain circumstances, by 
the disinterested members of the Covance Board. In addition, an acquisition 
of certain securities or assets of Covance within two years after the 
Distribution Date might jeopardize the tax treatment of the Distributions and 
could result in Covance being required to indemnify Corning and Quest 
Diagnostics. See "-- Potential Liability under the Spin-Off Tax 
Indemnification Agreements" and "Antitakeover Effects of Certain Provisions 
of the Covance Certificate of Incorporation and the Covance By-Laws." 

                                     113 
<PAGE> 

                          CAPITALIZATION OF COVANCE 

   The following table sets forth Covance's capitalization as of September 
30, 1996 giving effect to the estimated initial borrowing under the Covance 
Credit Facility and the Covance Spin-Off Distribution as if such transactions 
occurred on such date. This table should be read in conjunction with the 
Covance Financial Statements (as defined below) and notes thereto, and the 
Covance Pro Forma Financial Information (as defined below) and notes thereto 
included elsewhere herein. Historical and pro forma capitalization may not be 
indicative of Covance's future capitalization as an independent company. See 
"Management's Discussion and Analysis of Financial Condition and Results of 
Operations of Covance" and "Business of Covance." 

<TABLE>
<CAPTION>
                                                       Pro Forma 
                                        Historical    Adjustments     Pro Forma 
                                        ----------    ------------   ----------- 
                                                     (in thousands) 
<S>                                     <C>           <C>            <C>
Long-Term Debt: 
 Due to banks                            $             $ 128,165 (a)   $128,165 
 Due to Corning and affiliates            118,165       (118,165)(a) 
                                          --------     -----------      --------- 
  Total Long-Term Debt                    118,165         10,000        128,165 
                                          --------     -----------      --------- 
Stockholder's Equity: 
 Contributed capital                       32,368         22,500 (b)     54,868 
 Retained earnings                         70,505        (17,822)(b)     52,683 
 Cumulative translation adjustment          2,999                         2,999 
                                          --------     -----------      --------- 
  Total Stockholder's Equity              105,872          4,678        110,550 
                                          --------     -----------      --------- 
Total Capitalization                     $224,037      $  14,678       $238,715 
                                          ========     ===========      ========= 
</TABLE>

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

(a) The pro forma adjustment to long-term debt due to banks and due to 
    Corning and affiliates reflect the borrowings to be incurred in 
    connection with the Covance Spin-Off Distribution. Immediately prior to 
    the Covance Spin-Off Distribution, Covance will incur long-term bank 
    borrowings to repay Corning and affiliates for all intercompany 
    borrowings and income tax liabilities. Assuming the Covance Spin-Off 
    Distribution occurred on September 30, 1996, such borrowings would 
    aggregate approximately $128.2 million. The assumed interest rate on 
    these borrowings is 6.0%. 

(b) The pro forma adjustments to contributed capital and retained earnings 
    represent costs directly related to the Covance Spin-Off Distribution 
    expected to be incurred during the fourth quarter of 1996. Such costs 
    consist of direct costs of the Covance Spin-Off Distribution and one-time 
    charges associated with shares allocated to the employee stock ownership 
    and other employee benefit plans. 

                                     114 
<PAGE> 

                        SELECTED HISTORICAL FINANCIAL 
                               DATA OF COVANCE 

   The following table presents selected historical financial data of Covance 
at the dates and for each of the periods indicated. The selected financial 
data as of and for each of the years ended December 31, 1995, 1994 and 1993 
have been derived from the audited combined financial statements of Covance 
(the "Audited Covance Financial Statements") and the notes thereto included 
elsewhere herein. The selected financial data as of and for the nine months 
ended September 30, 1996 and 1995 and the years ended December 31, 1992 and 
1991 have been derived from the unaudited combined financial statements of 
Covance (the "Covance Interim Financial Statements" and, together with the 
Audited Covance Financial Statements, the "Covance Financial Statements"). In 
the opinion of management, the unaudited combined financial statements 
include all adjustments, consisting of normal recurring accruals, that are 
necessary for a fair presentation of the financial position and results of 
operations for these periods. The unaudited interim results of operations for 
the nine months ended September 30, 1996 are not necessarily indicative of 
the results for the entire year ending December 31, 1996. 

   The selected financial data should be read in conjunction with the Covance 
Financial Statements and notes thereto, and the Covance Pro Forma Financial 
Information included elsewhere herein. Historical combined financial data may 
not be indicative of Covance's future performance as an independent company. 
See the Covance Financial Statements and notes thereto and Covance Pro Forma 
Financial Information and notes thereto. See also "Management's Discussion 
and Analysis of Financial Condition and Results of Operations of Covance" and 
"Business of Covance." 

                                     115 
<PAGE> 

<TABLE>
<CAPTION>
                                  Nine Months Ended 
                                    September 30,                           Year Ended December 31, 
                                ----------------------     ----------------------------------------------------------- 
                                  1996         1995          1995         1994        1993       1992         1991 
                                --------     ----------    ----------   --------   --------    --------    ---------- 
                                                                   (in thousands) 
<S>                             <C>          <C>           <C>          <C>        <C>         <C>         <C>
Income Statement Data: 
Net revenues                    $357,406     $302,886      $409,174     $319,501    $289,697   $270,871     $246,949 
Costs and expenses: 
 Cost of revenue                 232,828      198,820       270,726      213,490     192,783    192,375      176,860 
 Selling, general and 
   administrative                 57,573       46,965        64,201       48,892      42,949     41,230       37,106 
 Restructuring charge                           4,616         4,616                               3,373 
 Depreciation and 
   amortization                   18,130       16,166        22,070       18,520      16,984     15,212       14,621 
                                  ------      --------      --------      ------      ------      ------     -------- 
   Total                         308,531      266,567       361,613      280,902     252,716    252,190      228,587 
                                  ------      --------      --------      ------      ------      ------     -------- 
Income from operations            48,875       36,319(a)     47,561(a)    38,599      36,981     18,681       18,362 
                                  ------      --------      --------      ------      ------      ------     -------- 
Other expense (income) 
 Interest expense, net             4,536        3,918         5,269        4,307       4,421      5,686        4,388 
 Foreign exchange (gain) 
   loss                             (212)        (609)         (784)        (712)        852      1,258 
                                  ------      --------      --------      ------      ------      ------     -------- 
                                   4,324        3,309         4,485        3,595       5,273      6,944        4,388 
                                  ------      --------      --------      ------      ------      ------     -------- 
Income before taxes and 
  equity investee loss 
  (gain)                          44,551       33,010(a)     43,076(a)    35,004      31,708     11,737       13,974 
Taxes on income                   19,411       14,147        18,445       14,924      13,506      6,834        6,835 
Equity investee loss (gain)          (68)         351           405          435       1,391        303          394 
                                  ------      --------      --------      ------      ------      ------     -------- 

Net income before cumulative 
  effect of change in 
  accounting method               25,208       18,512        24,226       19,645      16,811      4,600        6,745 
Cumulative effect of change 
  in method of accounting 
  for postretirement 
  benefits other than 
  pensions                                                                                        4,334 
                                  ------      --------      --------      ------      ------      ------     -------- 
Net income                      $ 25,208     $ 18,512(a)   $ 24,226(a)  $ 19,645    $ 16,811   $    266     $  6,745 
                                  ======      ========      ========      ======      ======      ======     ======== 
Balance Sheet Data 
  (at end of period): 
 Working capital                $ 47,453     $ 27,362      $ 18,472     $ 12,961    $ 12,076   $ 15,451     $ 12,817 
 Total assets                    402,592      332,257       322,510      271,992     229,693    225,337      183,174 
 Long-term debt                  118,165       97,711        89,836       75,178      69,239     77,916       88,801 
 Stockholder's equity            105,872       78,361        82,517       63,908      49,388     37,197       37,206 
</TABLE>

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

(a) Excluding the impact of the second quarter 1995 restructuring charge 
    totalling $4,616 ($2,770 net of tax), income from operations, income 
    before taxes and equity investee loss and net income for the nine months 
    ended September 30, 1995 was $40,935, $37,626 and $21,282, respectively, 
    and for the year ended December 31, 1995 was $52,177, $47,692 and 
    $26,996, respectively. 

                                     116 
<PAGE> 

                  PRO FORMA FINANCIAL INFORMATION OF COVANCE 

   The unaudited pro forma combined statements of income for the nine months 
ended September 30, 1996 and the year ended December 31, 1995 present the 
results of operations of Covance assuming that the Covance Spin-Off 
Distribution had been completed as of January 1, 1995. The unaudited pro 
forma combined balance sheet as of September 30, 1996 presents the combined 
financial position of Covance assuming that the Covance Spin-Off Distribution 
had been completed on that date. In the opinion of Covance management, the 
unaudited pro forma combined financial information of Covance ("Covance Pro 
Forma Financial Information") includes all material adjustments necessary to 
restate Covance's historical results. The adjustments required to reflect 
such assumptions are described in the Notes to the Covance Pro Forma 
Financial Information and are set forth in the "Pro Forma Adjustments" 
column. 

   The Covance Pro Forma Financial Information should be read in conjunction 
with the Covance Financial Statements and notes thereto included elsewhere 
herein. The Covance Pro Forma Financial Information presented is for 
informational purposes only and may not necessarily reflect the future 
results of operations or financial position or what the results of operations 
or financial position would have been had the Covance Spin-Off Distribution 
occurred as assumed herein, or had Covance been operated as an independent 
company during the periods shown. 

                                     117 
<PAGE> 

                        COVANCE INC. AND SUBSIDIARIES 
               UNAUDITED PRO FORMA COMBINED STATEMENT OF INCOME 
                     Nine Months Ended September 30, 1996 

<TABLE>
<CAPTION>
                                                                  Pro Forma 
                                                   Historical    Adjustments      As Adjusted 
                                                    ----------    -----------    --------------- 
                                                     (in thousands, except share and per share 
                                                                       data) 
<S>                                                <C>           <C>             <C>
Net revenues                                        $357,406       $              $   357,406 

Cost and expenses 
 Cost of revenue                                     232,828                          232,828 
 Selling, general and administrative expenses         57,573         1,500 (a)         59,073 
 Depreciation and amortization                        18,130                           18,130 
                                                      --------     ----------      ------------- 
  Total                                              308,531         1,500            310,031 
                                                      --------     ----------      ------------- 
Income from operations                                48,875        (1,500)            47,375 
                                                      --------     ----------      ------------- 
Other expense 
 Interest expense, net                                 4,536               (b)          4,536 
 Foreign exchange loss                                  (212)                            (212) 
                                                      --------     ----------      ------------- 
                                                       4,324                            4,324 
                                                      --------     ----------      ------------- 
Income before taxes and equity investee loss          44,551        (1,500)            43,051 
Taxes on income                                       19,411          (593)(c)         18,818 
Equity investee (gain)                                   (68)                             (68) 
                                                      --------     ----------      ------------- 

Net income                                          $ 25,208       $  (907)       $    24,301 
                                                      ========     ==========      ============= 

Pro forma shares outstanding                                                       56,903,469(d) 

Net income per share                                                              $      0.43(e) 
</TABLE>

The accompanying notes to unaudited pro forma combined financial information 
are an integral part hereof. 

                                     118 
<PAGE> 

                        COVANCE INC. AND SUBSIDIARIES 
               UNAUDITED PRO FORMA COMBINED STATEMENT OF INCOME 
                         Year Ended December 31, 1995 

<TABLE>
<CAPTION>
                                                                  Pro Forma 
                                                   Historical    Adjustments      As Adjusted 
                                                    ----------    -----------    --------------- 
                                                     (in thousands, except share and per share 
                                                                       data) 
<S>                                                <C>           <C>             <C>
Net revenues                                        $409,174       $              $   409,174 

Cost and expenses 
 Cost of revenue                                     270,726                          270,726 
 Selling, general and administrative expenses         64,201         2,000 (a)         66,201 
 Restructuring charge                                  4,616                            4,616 
 Depreciation and amortization                        22,070                           22,070 
                                                      --------     ----------      ------------- 
  Total                                              361,613         2,000            363,613 
                                                      --------     ----------      ------------- 
Income from operations                                47,561        (2,000)            45,561 
                                                      --------     ----------      ------------- 
Other expense (income) 
 Interest expense, net                                 5,269               (b)          5,269 
 Foreign exchange (gain)                                (784)                            (784) 
                                                      --------     ----------      ------------- 
                                                       4,485                            4,485 
                                                      --------     ----------      ------------- 
Income before taxes and equity investee loss          43,076        (2,000)            41,076 
Taxes on income                                       18,445          (790)(c)         17,655 
Equity investee loss                                     405                              405 
                                                      --------     ----------      ------------- 
Net income                                          $ 24,226       $(1,210)       $    23,016 
                                                      ========     ==========      ============= 

Pro forma shares outstanding                                                       56,903,469(d) 

Net income per share                                                              $      0.40(e) 
</TABLE>

The accompanying notes to unaudited pro forma combined financial information 
are an integral part hereof. 

                                     119 
<PAGE> 

                        COVANCE INC. AND SUBSIDIARIES 
                  UNAUDITED PRO FORMA COMBINED BALANCE SHEET 
                              September 30, 1996 

<TABLE>
<CAPTION>
                                                                Pro Forma         As 
                                                Historical     Adjustments     Adjusted 
                                                 ----------    ------------   ---------- 
                                                             (in thousands) 
<S>                                             <C>            <C>            <C>
Assets 
Current Assets: 
 Cash and cash equivalents                       $ 13,551       $              $ 13,551 
 Accounts receivable, net                          95,690                        95,690 
 Unbilled services                                 43,110                        43,110 
 Inventory                                         14,718                        14,718 
 Deferred income taxes                             14,273                        14,273 
 Prepaid expenses and other assets                 20,639                        20,639 
                                                   --------     -----------     -------- 
  Total Current Assets                            201,981                       201,981 

Property and equipment, net                       143,956                       143,956 
Goodwill, net                                      43,443                        43,443 
Other assets                                       13,212                        13,212 
                                                   --------     -----------     -------- 
  Total Assets                                   $402,592       $              $402,592 
                                                   ========     ===========     ======== 

Liabilities and Stockholder's Equity 
Current Liabilities: 
 Trade accounts payable                          $ 23,627                      $ 23,627 
 Accrued payroll and benefits                      30,058                        30,058 
 Accrued expenses and other liabilities            36,410       $   5,000 (f)    41,410 
 Unearned revenue                                  46,025                        46,025 
 Income taxes payable                              18,408         (10,000)(g)     8,408 
                                                   --------     -----------     -------- 
  Total Current Liabilities                       154,528          (5,000)      149,528 
                                                   --------     -----------     -------- 

Long-term debt                                                    128,165 (g)   128,165 
Due to Corning Incorporated and affiliates        118,165        (118,165)(g) 
Deferred income taxes                               9,583          (9,678)(f)       (95) 
Other liabilities                                  14,444                        14,444 
                                                   --------     -----------     -------- 
  Total Liabilities                               296,720          (4,678)      292,042 
                                                   --------     -----------     -------- 

Commitments and Contingent Liabilities 
Stockholder's Equity: 
 Contributed capital                               32,368          22,500 (f)    54,868 
 Retained earnings                                 70,505         (17,822)(f)    52,683 
 Cumulative translation adjustment                  2,999                         2,999 
                                                   --------     -----------     -------- 
  Total Stockholder's Equity                      105,872           4,678       110,550 
                                                   --------     -----------     -------- 
Total Liabilities and 
 Stockholder's Equity                            $402,592       $              $402,592 
                                                   ========     ===========     ======== 
</TABLE>

The accompanying notes to unaudited pro forma combined financial information 
are an integral part hereof. 

                                     120 
<PAGE> 

                        COVANCE INC. AND SUBSIDIARIES 
         NOTES TO UNAUDITED PRO FORMA COMBINED FINANCIAL INFORMATION 

Note 1--Pro Forma Adjustments: 

Statements of Income 

(a) The pro forma adjustment to selling, general and administrative expenses 
    represents estimated incremental administrative overhead costs associated 
    with being a public company. 

(b) Immediately prior to the Covance Spin-Off Distribution, Covance will 
    incur long-term bank borrowings to repay Corning and affiliates for all 
    intercompany borrowings and income tax liabilities due at the date of the 
    Covance Spin-Off Distribution. Assuming the Covance Spin-Off Distribution 
    occurred on September 30, 1996, such borrowings would aggregate 
    approximately $128.2 million. Since the assumed interest rate on these 
    borrowings of 6.0% approximates the blended rate on Covance's historical 
    borrowings from Corning, no pro forma adjustment to interest expense is 
    necessary. If the interest rate on the bank borrowings fluctuates by 
    1/8%, interest expense fluctuates by approximately $160,000 annually. 

(c) The pro forma adjustment to taxes on income represents the estimated 
    income tax benefit of pro forma adjustment (a) above at an effective tax 
    rate of 39.5%. 

(d) The pro forma common shares outstanding represents Covance management's 
    current estimate of the number of shares to be outstanding after the 
    Covance Spin-Off Distribution. Management's estimate includes (a) the 
    issuance of approximately 56.0 million shares of Covance Common Stock at 
    an exchange ratio of one share of Covance Common Stock issued for every 
    four shares of Corning Common Stock outstanding and (b) the issuance of 
    an estimated 900,000 shares into the employee stock ownership and other 
    benefit plans. Covance management's estimate of shares outstanding is 
    subject to change as the result of normal issuances and repurchases of 
    Corning Common Stock prior to the date of the Covance Spin-Off 
    Distribution and finalization of the proposed structure of the employee 
    stock ownership plan. 

Net Income Per Share 

(e) Net income per share is computed by dividing net income by the pro forma 
    number of shares of common stock outstanding. Common stock equivalents 
    are not included in the net income per share computation because they do 
    not result in material dilution. Historical net income per share is not 
    presented as Covance's historical capital structure is not comparable to 
    periods subsequent to the Covance Spin-Off Distribution. 

Balance Sheet 

(f) The pro forma adjustments to accrued expenses and other liabilities, 
    contributed capital, deferred income taxes and retained earnings 
    represent costs directly related to the Covance Spin-Off Distribution 
    expected to be incurred during the fourth quarter of 1996. Such amounts, 
    which consist of direct costs of the Covance Spin-Off Distribution 
    (estimated at $5.0 million) and one-time charges associated with the 
    issuance of shares into the employee stock ownership (estimated at $21.0 
    million) and other benefit plans (estimated at $1.5 million), which 
    amounts represent the estimated fair market value of such shares at the 
    expected date of issuance, have not been reflected in the Unaudited Pro 
    Forma Combined Statements of Income because they are non-recurring. The 
    amount of the charges associated with the issuance of shares into the 
    employee stock ownership and other benefit plans is subject to change 
    based on the market price of the Covance Common Stock on the Distribution 
    Date. 

(g) The pro forma adjustments to long-term debt, due to Corning and 
    affiliates and income taxes payable reflect the borrowings to be incurred 
    in connection with the Covance Spin-Off Distribution. Immediately prior 
    to the Covance Spin-Off Distribution, Covance will incur long-term bank 
    borrowings to repay Corning and affiliates for all intercompany 
    borrowings and income tax liabilities. Assuming the Covance Spin-Off 
    Distribution occurred on September 30, 1996 such borrowings would 
    aggregate approximately $128.2 million. 

                                     121 
<PAGE> 

                     MANAGEMENT'S DISCUSSION AND ANALYSIS 
                    OF FINANCIAL CONDITION AND RESULTS OF 
                            OPERATIONS OF COVANCE 

Overview 

   Covance is a leading CRO providing a wide range of integrated product 
development services on a worldwide basis to the biotechnology, 
pharmaceutical and medical device industries. In addition, and to a lesser 
extent, Covance provides services such as health economics for managed care 
organizations, hospitals and health care provider networks, and early 
development and laboratory testing services to the chemical, agrochemical and 
food industries. The foregoing services can be broadly classified into six 
lines of business: preclinical, biomanufacturing, clinical and periapproval, 
central laboratory, clinical packaging, and health economics. These six lines 
of business can be further categorized as non-clinical (preclinical and 
biomanufacturing) and clinical (clinical and periapproval, central 
laboratory, clinical packaging and health economics). Covance believes it is 
one of the largest biopharmaceutical CROs, based on estimated 1995 annual net 
revenue, and one of only a few that are capable of providing comprehensive 
global product development services. Covance offers its clients high quality 
services designed to reduce product development time, allowing them to 
introduce their products into the marketplace faster and, thus, maximize the 
period of marketing exclusivity and monetary return on their investments. 
Additionally, Covance's comprehensive services and broad experience provide 
clients with a variable cost alternative to fixed cost internal development 
capabilities. 

   The businesses that today constitute Covance were acquired by Corning, 
starting in 1987, as part of a strategy to create a global, integrated and 
full service product development company. In keeping with this strategy, 
during the period 1994 through the present, Covance has purchased the 
remaining interest in a jointly owned company, acquired a significant 
minority interest in a complementary service business, acquired two new 
businesses and formed a major new business venture. Specifically, in April 
1994, Covance acquired the remaining interest in SciCor S.A., a provider of 
central laboratory testing services based in Switzerland. The transaction was 
accounted for as a purchase business combination. In October 1994, Covance 
acquired a significant minority equity position in Bio- Imaging Technologies, 
Inc. ("Bio-Imaging"), which uses proprietary imaging technology to quantify 
the diagnostic and therapeutic effectiveness of experimental drugs and 
devices. Covance expanded its offering of value added product development 
services in January 1995 with the acquisition of National Packaging Systems, 
Inc., a leading clinical packaging company. The transaction was accounted for 
as a purchase business combination. In February 1995, Covance formed Covance 
Biotechnology, a majority-owned company which will enable Covance to engage 
in biomanufacturing. In recognition of the rapid changes in the 
biopharmaceutical industry's marketplace, particularly the need for the 
industry to further demonstrate the benefits and cost effectiveness of their 
products to payors, Covance purchased in March 1996 all the assets and 
substantially all of the liabilities of Health Technology Associates, Inc. 
("HTA"), a leading health economics company, in a transaction accounted for 
as a purchase business combination. In October 1996, Covance expanded its 
clinical packaging capabilities to Europe with the purchase of Swiss based 
CRS Pacamed AG (now known as Covance Pharmaceutical Packaging Services AG). 
In addition, Covance acquired an 81,000 square foot facility in Horsham, 
England, which will be used, among other things, to provide clinical 
packaging services in Europe. 

   During the fiscal year ended December 31, 1995, approximately 
three-quarters of Covance's net revenues were earned under contracts, which 
generally range in duration from a few months to two years. Revenue from 
these contracts is recognized as costs are incurred on the basis of the 
relationship between costs incurred and estimated total costs. Typically, 
Covance's contracts in the preclinical, central laboratory, clinical 
packaging and health economics areas are fixed price or fee-for-service and 
in the clinical and periapproval areas are fee-for-service with a cap. To a 
lesser extent, some of the contracts in the clinical and periapproval areas 
are fixed price or fee-for-service without a cap. The contracts may contain 
provisions for renegotiation for cost overruns arising from changes in the 
level of work scope. Renegotiated amounts are included in net revenues when 
earned and realization is assured. In some cases, for multi-year contracts 
involving preclinical and clinical and periapproval trials, a portion of the 
contract fee is paid at the time the trial is initiated, with 
performance-based installments payable over the contract duration, in some 
cases on a milestone achievement basis. Covance routinely subcontracts with 
independent physician investigators in connection with multi-site clinical 
trials. Investigator fees are not reflected in net revenues or expenses since 
such fees are granted by customers on a "pass-thru basis" without risk or 
reward to Covance. While most contracts are terminable either immediately or 
upon notice by the client, they typically require payment 

                                     122 
<PAGE> 

of expenses to wind down a study and fees earned to date, and, in some cases, 
a termination fee or a payment of some portion of the fees or profit that 
could have been earned under the contract if it had not been terminated 
early. 

   Covance's cost of revenue includes appropriate amounts necessary to 
complete the net revenues and earnings process and includes direct labor and 
related benefit charges, other direct costs and allocable expenses (including 
indirect labor, facility charges and information technology costs). These 
costs, as a percentage of net revenues, tend to fluctuate from one period to 
another (generally within a range of up to 2% in either direction) 
principally as a result of changes in labor utilization and the mix of 
service offerings involving hundreds of studies conducted during any period 
of time. Accordingly, changes in cost of revenue as a percentage of net 
revenues plus or minus 2% are expected from one period to another. 

Results of Operations 

   Three Months Ended September 30, 1996 Compared with Three Months Ended 
September 30, 1995. Net revenues increased 19.9% to $127.2 million for the 
three months ended September 30, 1996 from $106.1 million for the 
corresponding 1995 period. Excluding the impact of the 1996 acquisition of 
HTA, growth in net revenues was 14.3%. Net revenues from Covance's combined 
clinical lines of business, excluding the recently acquired health economics 
business, grew in excess of 15% benefitting from the continuing trend in 
outsourcing of clinical development activities, while net revenues from 
Covance's preclinical business grew in excess of 10%. 

   Cost of revenue increased 18.8% to $83.2 million for the three months 
ended September 30, 1996 from $70.1 million for the corresponding 1995 period 
as a result of the increase in net revenues. Cost of revenue, as a percentage 
of net revenues, decreased to 65.4% for the three months ended September 30, 
1996 from 66.0% for the corresponding 1995 period. 

   Overall, selling, general and administrative expense, which consists 
primarily of administrative payroll and related benefit charges, advertising 
and promotional expenses, administrative travel and allocable expenses 
(facility charges and information technology costs), increased 22.2% to $20.6 
million for the three months ended September 30, 1996 from $16.9 million for 
the corresponding 1995 period. As a percentage of net revenues, selling, 
general and administrative expense increased to 16.2% for the quarter ended 
September 30, 1996 from 15.9% for the corresponding 1995 period. Contributing 
to the increase in selling, general and administrative expense were a 
continuing increase in Covance's corporate center function, administrative 
costs associated with the establishment of Covance's new Singapore operation 
and the evaluation of further geographic expansion opportunities, partially 
offset by a reduction in certain administrative costs allocated by Corning 
and affiliates. 

   Depreciation and amortization increased 6.5% to $5.8 million or 4.6% of 
net revenues for the three months ended September 30, 1996 from $5.5 million 
or 5.2% of net revenues for the corresponding 1995 period as the growth in 
net revenues outpaced the increase in these non-cash charges. 

   Income from operations increased 28.0% to $17.5 million or 13.8% of net 
revenues for the quarter ended September 30, 1996 from $13.7 million or 12.9% 
of net revenues for the corresponding 1995 period. 

   Other expense increased $1.3 million for the three months ended September 
30, 1996 to $1.6 million from $0.2 million for the corresponding 1995 period, 
due to an increase in interest expense, net of $0.7 million and to larger 
foreign exchange gains recognized during the 1995 three-month period. 

   Covance's effective tax rate for the three months ended September 30, 1996 
increased to 43.4% from 42.9% for the comparable period in 1995. Since 
Covance operates on a global basis, its effective tax rate is subject to 
variation from year to year as the geographic dispersion of its pre-tax 
earnings changes. 

   Net income increased $1.6 million to $9.1 million for the quarter ended 
September 30, 1996 from $7.5 million for the corresponding 1995 period. 

   Nine Months Ended September 30, 1996 Compared with Nine Months Ended 
September 30, 1995. Net revenues increased 18.0% to $357.4 million for the 
nine months ended September 30, 1996 from $302.9 million for the 
corresponding 1995 period. Excluding the impact of the 1996 acquisition of 
HTA, growth in net revenues was 14.4%. Net revenues from Covance's combined 
clinical lines of business, excluding the newly acquired health economics 
business, grew nearly 20%, benefitting from the continuing trend in 
outsourcing of clinical development activities, while net revenues from its 
more mature preclinical line of business grew approximately 8.0%. 

                                     123 
<PAGE> 

   Cost of revenue increased 17.1% to $232.8 million for the nine months 
ended September 30, 1996 from $198.8 million for the corresponding 1995 
period as a result of the increase in net revenues. Cost of revenue, as a 
percentage of net revenues, decreased slightly to 65.1% for the nine months 
ended September 30, 1996 from 65.6% for the corresponding 1995 period. 

   Overall, selling, general and administrative expense increased 22.6% to 
$57.6 million for the nine months ended September 30, 1996 from $47.0 million 
for the corresponding 1995 period. As a percentage of net revenues, selling, 
general and administrative expense increased to 16.1% for the nine months 
ended September 30, 1996 from 15.5% for the corresponding 1995 period. 
Contributing to the increase in selling, general and administrative expenses 
were increasing pre-operating costs relative to Covance's biomanufacturing 
business, an increase in Covance's corporate center function, administrative 
costs associated with the establishment of Covance's new Singapore operation 
and the evaluation of further geographic expansion opportunities, partially 
offset by a reduction in certain administrative costs allocated by Corning 
and affiliates. 

   Depreciation and amortization increased 12.1% to $18.1 million or 5.1% of 
net revenues for the nine months ended September 30, 1996 from $16.2 million 
or 5.3% of net revenues for the corresponding 1995 period as the growth in 
net revenues outpaced the increase in these non-cash charges. 

   Income from operations increased 34.6% to $48.9 million for the nine 
months ended September 30, 1996 from $36.3 million for the corresponding 1995 
period. During the second quarter of 1995, Covance recorded a restructuring 
provision totalling $4.6 million ($2.8 million after tax) as a result of 
management's decision to discontinue certain nonstrategic operations. 
Excluding the impact of the 1995 restructuring provision, income from 
operations increased 19.4% to 13.7% of net revenues for the nine months ended 
September 30, 1996 from 13.5% of net revenues for the corresponding 1995 
period. 

   Other expense increased $1.0 million for the nine months ended September 
30, 1996 to $4.3 million from $3.3 million for the corresponding 1995 period, 
due to an increase in interest expense, net of $0.6 million and to larger 
foreign exchange gains recognized during the first nine months of 1995. 

   Covance's effective tax rate for the nine months ended September 30, 1996 
increased to 43.6% from 42.9% for the comparable period in 1995. Since 
Covance operates on a global basis, its effective tax rate is subject to 
variation from year to year as the geographic dispersion of its pre-tax 
earnings changes. 

   Net income increased $6.7 million to $25.2 million for the nine months 
ended September 30, 1996 from $18.5 million for the corresponding 1995 
period. Excluding the impact of the 1995 restructuring provision, net income 
increased $3.9 million or 18.4% for the nine months ended September 30, 1996 
compared to the corresponding 1995 period. 

   Year Ended December 31, 1995 Compared with Year Ended December 31, 
1994. Net revenues increased 28.1% to $409.2 million for 1995 from $319.5 
million for 1994. Excluding the impact of the 1995 acquisition of National 
Packaging Systems, Inc., growth in net revenues was 23.8%. Net revenues from 
Covance's combined clinical lines of business, excluding the newly acquired 
clinical packaging business, grew in excess of 35%, generally as a result of 
the growth in outsourcing of clinical development activities in 1995 as 
compared to 1994 and more specifically because of Covance's central 
laboratory's effort to complete development work on several large protease 
inhibitor studies by the end of 1995. Net revenues from Covance's preclinical 
business grew nearly 10%, largely as a result of particularly strong growth 
in Europe, fueled by new service offerings, overall volume increases and 
favorable foreign exchange rates in 1995 compared to 1994. 

   Cost of revenue increased 26.8% to $270.7 million or 66.2% of net revenues 
for 1995 from $213.5 million or 66.8% of net revenues for 1994, as a result 
of the increase in net revenues. 

   Overall, selling, general and administrative expense increased 31.3% to 
$64.2 million for 1995 from $48.9 million for 1994. As a percentage of net 
revenues these costs increased to 15.7% for 1995 from 15.3% for 1994. Largely 
contributing to the increase in selling, general and administrative expenses 
were administrative costs associated with the establishment of Covance's new 
biomanufacturing business, an increase in Covance's corporate center 
function, strategic consulting expenses incurred to reorganize a large 
portion of Covance's clinical operations into customer teams to better manage 
large scale clinical trials and increased marketing initiatives such as the 
establishment of a Lotus Notes(R) based centralized client contact database 
for use by Covance's sales force, partially 

                                     124 
<PAGE> 

offset by a non-recurring charge incurred in 1994 in connection with a 
separation payment made to Covance's then chief executive officer upon his 
resignation. 

   During 1995, Covance recorded a restructuring provision totalling $4.6 
million ($2.8 million after tax) as a result of management's decision to 
discontinue certain nonstrategic operations. The restructuring charge 
included severance costs relating to approximately 90 employees of which 
approximately 50 had been terminated as of December 31, 1995. The remaining 
employees were terminated and all other substantive activities to complete 
the restructuring plan were completed by April 30, 1996. Severance benefits 
are being paid in the form of salary continuation. The restructuring 
activities have occurred substantially in accordance with the restructuring 
plan. 

   Depreciation and amortization increased 19.2% to $22.1 million or 5.4% of 
net revenues for 1995 from $18.5 million or 5.8% of net revenues for 1994 as 
the growth in net revenues outpaced the increase in these non- cash charges. 

   Income from operations increased $9.0 million or 23.2% to $47.6 million 
for 1995 from $38.6 million for 1994. Excluding the impact of the 1995 
restructuring provision, the increase in income from operations was $13.6 
million or 35.2% to 12.8% of net revenues for 1995 from 12.1% of net revenues 
for 1994. 

   Other expense increased $0.9 million for 1995 to $4.5 million from $3.6 
million for 1994. This increase is entirely a result of an increase in 
interest expense relating principally to 1995 acquisition activity. 
Substantially all borrowings to date have been from Corning. 

   Covance's effective tax rate for 1995 increased slightly to 42.8% from 
42.6% for 1994. 

   Net income increased 23.3% to $24.2 million for 1995 from $19.6 million 
for 1994. Excluding the impact of the 1995 restructuring provision, the 
increase in net income was $7.4 million or 37.4% for 1995. 

   Year Ended December 31, 1994 Compared with Year Ended December 31, 
1993. Net revenues increased 10.3% to $319.5 million for 1994 from $289.7 
million for 1993. Excluding the impact of 1994 acquisitions, net revenues 
growth was 7.9%. Net revenues from Covance's combined clinical lines of 
business grew nearly 20%, largely due to growth in the European clinical and 
periapproval and central laboratory operations. Net revenues from Covance's 
preclinical operations was relatively unchanged compared to 1993 due to low 
volume together with pricing pressures in various product line offerings. 

   Cost of revenue increased 10.7% to $213.5 million or 66.8% of net revenues 
for 1994 from $192.8 million or 66.5% of net revenues for 1993. 

   Overall, selling, general and administrative expense increased 13.8% to 
$48.9 million or 15.3% of net revenues for 1994 from $42.9 million or 14.8% 
of net revenues for 1993. Largely contributing to the increase in selling, 
general and administrative expenses was a separation payment made to 
Covance's then chief executive officer upon his resignation. Exclusive of 
this non-recurring charge, selling, general and administrative expenses were 
relatively unchanged from 1993. 

   Depreciation and amortization increased 9.0% to $18.5 million or 5.8% of 
net revenues for 1994 from $17.0 million or 5.9% of net revenues for 1993 as 
the growth in net revenues outpaced the increase in these non-cash charges. 

   Income from operations increased 4.4% to $38.6 million or 12.1% of net 
revenues for 1994 from $37.0 million or 12.8% of net revenues for 1993. 

   Other expense decreased $1.7 million for 1994 to $3.6 million versus $5.3 
million for 1993. This reduction is a result of a net foreign currency 
transaction gain of $0.7 million reported for 1994 versus a net foreign 
currency transaction loss of $0.9 million reported for 1993. 

   Covance's effective tax rate for 1994 remained unchanged from 1993 at 
42.6%. 

   Net income increased 16.9% or $2.8 million to $19.6 million for 1994 from 
$16.8 million for 1993. 

Quarterly Results 

   Covance's quarterly operating results are subject to variation, and are 
expected to continue to be subject to variation, as a result of factors such 
as delays in initiating or completing significant preclinical and clinical 
and 

                                     125 
<PAGE> 

periapproval trials, termination of preclinical and clinical and periapproval 
trials, acquisitions and exchange rate fluctuations. Delays and terminations 
of studies or trials are often the result of actions taken by clients or 
regulatory authorities and are not typically controllable by Covance. Since a 
large amount of Covance's operating costs are relatively fixed while revenue 
is subject to fluctuation, minor variations in the commencement, progress or 
completion of preclinical and clinical and periapproval trials may cause 
significant variations in quarterly operating results. 

   The following table presents unaudited quarterly operating results of 
Covance for each of the ten most recent fiscal quarters in the period ended 
September 30, 1996. In the opinion of Covance, this information has been 
prepared on the same basis as the Audited Covance Financial Statements and 
reflects all adjustments (consisting only of normal recurring adjustments) 
necessary for a fair presentation of results of operations for those periods. 
This quarterly financial data should be read in conjunction with the Audited 
Covance Financial Statements and notes thereto included elsewhere herein. The 
operating results for any quarter are not necessarily indicative of the 
results to be expected in any future period. See "Risk Factors--Risks 
Relating to Covance--Volatility of Quarterly Operating Results." 

<TABLE>
<CAPTION>
                                                                  Quarter Ended 
                    ----------------------------------------------------------------------------------------------------------- 
                    June     Sept.      Dec.      Mar.                 Sept.       Dec. 
                     30,      30,       31,       31,      June 30,     30,        31,      Mar. 31,    June 30,     Sept. 30, 
                    1994      1994      1994      1995       1995       1995       1995       1996        1996         1996 
                   ------     ------   ------   ------    --------     -------    -------   --------    --------   ----------- 
                                                                  (in thousands) 
<S>               <C>       <C>       <C>       <C>       <C>         <C>        <C>        <C>         <C>        <C>
Net revenues ...   $77,762  $82,904   $84,612   $91,974    $104,813   $106,099   $106,288   $108,697    $121,530     $127,179 
Operating 
  expenses ......   66,685   73,214    74,967    78,991      95,148     92,428     95,046     94,659     104,195      109,677 
                      ----     ----      ----      ----      ------      -----      -----      ------     ------      --------- 
Income from 
  operations ...    11,077    9,690     9,645    12,983       9,665(a)   13,671    11,242     14,038      17,335       17,502 
Other expense, 
  net  ..........      876    1,030       897     1,434       1,644        231      1,176      1,159       1,615        1,550 
                      ----     ----      ----      ----      ------      -----      -----      ------     ------      --------- 
Pre-tax income 
  ...............   10,201    8,660     8,748    11,549       8,021(a)   13,440    10,066     12,879      15,720       15,952 
Income taxes ....    4,335    3,693     3,732     4,953       3,423      5,771      4,298      5,619       6,861        6,931 
Equity investee 
  loss (gain) ...      140       --        87        49         149        153         54        (44)         29          (53) 
                      ----     ----      ----      ----      ------      -----      -----      ------     ------      --------- 
Net income  .....  $ 5,726  $ 4,967   $ 4,929   $ 6,547    $  4,449(a) $  7,516  $  5,714   $  7,304    $  8,830     $  9,074 
                      ====     ====      ====      ====      ======      =====      =====      ======     ======      ========= 
</TABLE>

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

(a) Excluding the impact of the second quarter 1995 restructuring provision 
    totalling $4,616 ($2,770 net of tax), income from operations, pre-tax 
    income and net income were $14,281, $12,637 and $7,219 respectively. 

Liquidity and Capital Resources 

   Historically, Covance has participated in the centralized treasury and 
cash management processes of Corning. For domestic operations, cash received 
from operations was generally transferred to Corning on a daily basis. For 
international operations, excess cash was transferred to Corning 
periodically. Cash disbursements for operations were funded as needed from 
Corning. From time to time excess cash balances were maintained at Covance, 
generally for specific cash requirements. 

   
   Covance is currently negotiating with several banks concerning the 
establishment of the Covance Credit Facility. Covance expects that the 
Covance Credit Facility will provide for borrowings of up to $250 million, 
carry interest at LIBOR plus approximately 37.5 basis points and mature in 
five years. Covance intends to borrow under the Covance Credit Facility 
before the Covance Spin-Off Distribution to repay Corning and affiliates for 
all of its intercompany borrowings and income tax liabilities. Assuming the 
borrowing and Covance Spin-Off Distribution both occurred on September 30, 
1996, Covance would borrow approximately $128.2 million for such purpose. 
This would result in Covance's debt to equity and debt to capital ratios 
being 1.16:1 and 0.54:1, respectively. In addition, the Covance Credit 
Facility prohibits Covance from paying cash dividends on the Covance Common 
Stock during a Default or an Event of Default, if after giving effect 
thereto, Covance would not be in compliance with the financial covenants 
contained therein. See "Risk Factors--Risks Relating to Covance--Absence of 
Dividends; Restrictions on Dividends Imposed by the Covance Credit Facility" 
and "Description of Certain Indebtedness of Covance." 
    

   Covance's primary cash needs on both a short and long-term basis are for 
capital expenditures, expansion of services, possible future acquisitions, 
geographic expansion, working capital and other general corporate purposes. 
In 

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October 1996, Covance acquired CRS Pacamed AG, a Swiss entity providing 
clinical packaging services for a cash payment of $14.4 million. Also in 
October 1996, Covance acquired a new facility to house its clinical 
packaging, clinical and periapproval services and health economics operations 
in Europe for a cash payment of approximately $9.0 million. Furthermore, 
Covance expects to spend approximately $9.0 million on capital expenditures 
between October 1 and December 31, 1996 for maintenance and upgrade of 
existing equipment, outfitting of new facilities and computer equipment and 
software for newly hired employees and to fund an additional payment of 
approximately $6.6 million relating to a 1995 acquisition. Assuming these 
expenditures occur prior to the Covance Spin-Off Distribution, Covance 
estimates that its debt at the Distribution Date will be approximately $135 
million to $145 million. 

   Covance's management believes that the Covance Credit Facility will 
provide it with sufficient financial flexibility and ready access to cash on 
both a short-term and a long-term basis to fund, as required, capital 
expenditures, potential future acquisitions and other longer-term growth 
opportunities. 

   During the nine months ended September 30, 1996, Covance's operations 
provided net cash of $14.9 million, a decrease of $17.5 million from the 
corresponding 1995 amount. This reduction is attributable to a larger 
increase in working capital during the first nine months of 1996 as compared 
to the first nine months of 1995. During the year ended December 31, 1995, 
Covance's operations provided net cash of $45.1 million, an increase of $2.2 
million from 1994's level. 

   Investing activities for the nine months ended September 30, 1996 and the 
years ended December 31, 1995 and 1994 included acquisitions and capital 
spending to expand existing operations and purchase equipment to enhance 
scientific technology capabilities. Funding for new business acquisitions was 
provided through borrowings from Corning. Annually, cash provided by 
operations has historically been sufficient to fund capital expenditures. 

   Working capital was $47.5 million at September 30, 1996, an increase of 
$29.0 million from the December 31, 1995 level of $18.5 million. This 
increase was attributable to an increase in aggregate accounts receivable and 
unbilled services of $41.6 million or 42.8% to $138.8 million at September 
30, 1996 from $97.2 million at December 31, 1995. Covance has initiated 
collection and contract management efforts to reduce the percentage increase 
in aggregate accounts receivable and unbilled services to a level consistent 
with the increase in net revenues. Covance's ratio of current assets to 
current liabilities was 1.31 at September 30, 1996 and 1.15 at December 31, 
1995. 

   As described in Note 8 to the Audited Covance Financial Statements, a 
Covance subsidiary, Covance Biotechnology, entered into an operating lease 
arrangement in June 1995 whereby a custom-designed, fully equipped facility 
would be constructed. The lease will commence on the date of completion of 
construction of the facility, which is currently anticipated during the 
fourth quarter of 1996 and requires minimum annual lease payments of 
approximately $5.5 million. See "Risk Factors--Risks Relating to 
Covance--Biomanufacturing-- New Business Venture" and "Business of 
Covance--Services--Biomanufacturing." 

   In the fourth quarter of 1996, Covance plans to record a one-time charge 
of approximately $27.5 million associated with the Covance Spin-Off 
Distribution. The largest component of the charge will be the cost of 
establishing an employee stock ownership plan. The remainder of the charge is 
expected to consist of the direct costs of the Covance Spin-Off Distribution 
as well as the value of restricted stock awards expected to be granted. 

   In October 1995, the Financial Accounting Standards Board issued Statement 
No. 123, "Accounting for Stock- Based Compensation" ("SFAS 123"). This 
statement defines a fair value-based method of accounting for employee stock 
options and similar equity investments and encourages adoption of that method 
of accounting for employee stock compensation plans. However, it also allows 
entities to continue to measure compensation cost for employee stock 
compensation plans using the intrinsic value-based method of accounting 
prescribed by APB Opinion No. 25, "Accounting for Stock Issued to Employees" 
("APB 25"). Entities which elect to continue accounting for stock 
compensation plans utilizing APB 25 are required to disclose pro forma net 
income and earnings per share, as if the fair value-based method of 
accounting under SFAS 123 had been applied. Covance intends to account for 
the stock compensation plans pursuant to APB 25 and, as such, will include 
the pro forma disclosures required by SFAS 123 in its financial statements 
beginning in 1996. 

Foreign Currency 

   Contracts between Covance's foreign subsidiaries and its clients are 
frequently denominated in currencies other than the applicable subsidiary's 
local currency. Accordingly, payments received for services rendered under 
such 

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contracts are denominated in a currency different than the currency used for 
the payment of the subsidiary's expenses. Therefore, the subsidiary's net 
revenues, expenses and earnings are affected by fluctuations in exchange 
rates. In addition, Covance's combined financial statements are denominated 
in U.S. dollars and, accordingly, changes in exchange rates between the 
applicable foreign currency and the U.S. dollar will affect the translation 
of such subsidiary's financial results into U.S. dollars for purposes of 
reporting Covance's combined financial results. Translation adjustments are 
reported as a separate section of stockholder's equity. To date, such 
adjustments have not been material to Covance's financial statements. 

Taxes 

   Since Covance conducts operations on a global basis, Covance's effective 
tax rate has and will continue to depend upon the geographic distribution of 
its pretax earnings among locations with varying tax rates. Covance's profits 
are further impacted by changes in the tax rates of the various 
jurisdictions. In particular, as the geographic mix of Covance's pre-tax 
earnings among various tax jurisdictions changes, Covance's effective tax 
rate may vary from period to period. See Note 5 to the Audited Covance 
Financial Statements. 

Inflation 

   While most of Covance's net revenues are earned under contracts, the 
long-term contracts (those in excess of one year) generally include an 
inflation or cost of living adjustment for the portion of the services to be 
performed beyond one year from the contract date. As a result Covance 
believes that the effects of inflation generally do not have a material 
adverse effect on its operations or financial condition. 

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                             BUSINESS OF COVANCE 

General 

   Covance is a leading CRO providing a wide range of integrated product 
development services on a worldwide basis to the biotechnology, 
pharmaceutical and medical device industries. In addition, and to a lesser 
extent, Covance provides services such as health economics for managed care 
organizations, hospitals and health care provider networks and early 
development and laboratory testing services to the chemical, agrochemical and 
food industries. The foregoing services can be broadly classified into six 
lines of business: preclinical, biomanufacturing, clinical and periapproval, 
central laboratory, clinical packaging and health economics. These six lines 
of business can be further categorized as non-clinical (preclinical and 
biomanufacturing) and clinical (clinical and periapproval, central 
laboratory, clinical packaging and health economics). Covance believes it is 
one of the largest biopharmaceutical CROs, based on estimated 1995 annual net 
revenue, and one of a few that are capable of providing comprehensive global 
product development services. Covance offers its clients high quality 
services designed to reduce product development time, allowing them to 
introduce their products into the marketplace faster and, thus, maximize the 
period of marketing exclusivity and monetary return on their investments. 
Additionally, Covance's comprehensive services and broad experience provide 
clients with a variable cost alternative to fixed cost internal development 
capabilities. 

History 

   The businesses that today constitute Covance were acquired by Corning as 
part of a strategy to create a global, integrated and full service product 
development company. In 1987 Corning acquired Hazleton Corporation (recently 
known as Corning Hazleton and now known as Covance Laboratories), owner of 
leading preclinical drug safety assessment laboratories and Phase I clinical 
research units. In 1989 Corning added Phase II and Phase III clinical trials 
expertise with the acquisition of a leading, global clinical CRO, G.H. 
Besselaar Associates (recently known as Corning Besselaar and now known as 
Covance Clinical and Periapproval Services), and expanded its clinical trials 
expertise in 1990 with the purchase of PACT Inc. (recently known as Corning 
PACT and now known as Covance Clinical and Periapproval Services), a leading 
periapproval studies company. In 1991 Corning purchased SciCor Inc. (recently 
known as Corning SciCor and now known as Covance Central Laboratories), a 
clinical laboratory dedicated to the drug development process. Corning 
expanded its pharmaceutical laboratory capabilities in 1992 with the creation 
in Switzerland of a jointly owned company, SciCor S.A., and, through Covance, 
acquired 100% of this company in 1994. Focusing on innovative ways to 
accelerate the drug development cycle, Covance acquired in late 1994 a 
significant minority equity position in Bio-Imaging, which uses proprietary 
imaging technology to quantify the diagnostic and therapeutic effectiveness 
of experimental drugs and devices. Covance expanded its offering of 
value-added development services in 1995 with the acquisition of National 
Packaging Systems, Inc. (recently known as Corning National Packaging, Inc. 
and now known as Covance Pharmaceutical Packaging Services), a leading 
clinical packaging company. In 1995 Covance also formed Covance 
Biotechnology, a majority-owned company which will enable Covance to engage 
in biomanufacturing. In recognition of the rapid changes in the 
biopharmaceutical industry's marketplace, particularly the need for the 
industry to further demonstrate the benefits and cost effectiveness of their 
products to payors, Covance purchased in early 1996 HTA (now known as Covance 
Health Economics and Outcomes Services), a leading health economics company 
serving at the date of acquisition over 100 clients. In October 1996, Covance 
expanded its clinical packaging capabilities to Europe with the purchase of 
Swiss based CRS Pacamed AG (now known as Covance Pharmaceutical Packaging 
Services). In addition, Covance acquired an 81,000 square foot facility in 
Horsham, England, which will be used, among other things, to provide clinical 
packaging services in Europe. 

The New Drug Development Process--Overview 

   Before a new drug may be marketed to the public, it must undergo extensive 
testing and regulatory review to determine that the drug is both safe and 
effective for its intended purpose. The developmental process and typical 
corresponding time periods are as follows: 

   Preclinical Research (6 months to 3 years). In vitro ("test tube") and in 
vivo ("animal") studies are conducted to establish the basic pharmacokinetic 
effect and safety of a drug including the toxicity of the drug over a wide 
range of doses. Initially, acute toxicology studies are conducted. In the 
United States, if results warrant continuing development of the drug, the 
manufacturer (also known as the "sponsor") will file an Investigational New 
Drug 

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Application ("IND"), whereupon the FDA may grant permission to begin human 
trials (also known as "clinical trials"). 

   Preclinical studies may continue after the start of clinical trials to 
determine the longer term effects of a product. For instance, a preclinical 
study might focus on the possible side effects, metabolism and/or 
pharmacokinetic disposition of a drug. 

   Clinical Trials (3.5 to 6 years). 
   (bullet) Phase I (6 months to 1 year). This phase involves the initial 
            basic safety and pharmacology testing in approximately 20 to 100 
            human subjects, usually healthy volunteers in a closely monitored 
            setting, including studies to determine the side effect profile 
            of the drug, how the drug works, how it is affected by other 
            drugs, where it goes in the body, how long it remains active, and 
            how it is broken down and eliminated from the body. 

   (bullet) Phase II (1 to 2 years). This phase involves basic efficacy 
            (effectiveness) and dose-range testing in approximately 100 to 
            400 carefully selected patients suffering from the disease or 
            condition under study to help determine the best effective dose, 
            confirm that the drug works as expected, and provide additional 
            safety data. The trials are typically well controlled and usually 
            involve a placebo, also known as a "sugar pill." A placebo is an 
            identical tablet or solution which lacks the active substance 
            under investigation. 

   (bullet) Phase III (2 to 3 years). This phase involves efficacy and safety 
            studies in broader populations of hundreds or thousands of 
            patients at many investigational sites (hospitals and clinics) 
            and may involve placebo- controlled trials, in which the new drug 
            is compared with a placebo; studies comparing the new drug with 
            one or more drugs with established safety and efficacy profiles 
            in the same therapeutic category; or studies where there is no 
            comparison to a placebo or another drug ("uncontrolled" trials). 
            Generally, Phase III studies are intended to provide additional 
            information on drug safety and efficacy, an evaluation of the 
            risk-benefit relationship for the drug, and information for the 
            adequate labeling of the product. 

   NDA Preparation and Submission. Upon completion of Phase III trials, the 
sponsor or CRO assembles the tabulated and statistically analyzed data from 
all phases of development into a single large document, the New Drug 
Application ("NDA"), which comprises, on average, approximately 100,000 
pages. 

   FDA Review and Approval (1 to 2 years). At this stage, the FDA will 
scrutinize data from all phases of development to confirm that the sponsor 
has complied with regulations and that the drug is safe and effective for the 
specific use (or "indication") under study. Product labeling is also approved 
at this stage, which serves as a guideline to the sponsor about how its 
product can be promoted in the marketplace. 

   Treatment Investigational New Drug (May span late Phase II, Phase III, and 
FDA review). When results from Phase II or Phase III show special promise in 
the treatment of a serious condition for which existing therapeutic options 
are limited or of minimal value, the FDA may allow the manufacturer to make 
the new drug available to a larger number of patients through the regulated 
mechanism of a treatment investigational new drug ("TIND") application. 
Although less scientifically rigorous than a controlled clinical trial, a 
TIND may enroll and collect primarily safety data from thousands of patients. 
See "--Services--Clinical and Periapproval Services--Treatment 
Investigational New Drug Applications." 

   Post-Marketing Surveillance and Phase IV Studies (Periapproval). Federal 
regulation requires the sponsor to collect and periodically report to the FDA 
additional safety and efficacy data on the drug for as long as the sponsor 
markets the drug (post-marketing surveillance). If the drug is marketed 
outside the United States, these reports must include data from all countries 
in which the drug is sold. Additional studies (Phase IV) may be undertaken 
after initial approval to find new uses for the drug or to test new dosage 
formulations. All of these studies are types of "periapproval" studies. See 
"--Services--Clinical and Periapproval Services--Other Periapproval Studies." 

   Similar extensive testing and regulatory reviews are required in Europe 
and some Asian countries to determine that a new drug is safe and effective 
for its intended purpose before it can be marketed to the public. 

CRO Industry Overview 

   The CRO industry provides independent product development services to the 
pharmaceutical, biotechnology and medical device industries, and, in general, 
CROs derive substantially all of their revenue from the research 

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and development expenditures of these industries. Today, there are a few 
full-service companies. Full-service CROs design and manage preclinical and 
clinical and periapproval studies and trials, provide health economic 
services, and provide packaging and central laboratory services and other 
services required to develop and market new products in accordance with 
applicable government regulations in the jurisdictions where the services are 
provided, including the regulations of the FDA in the United States. 

   The CRO industry is highly fragmented, with hundreds of small, 
limited-service providers, several medium- sized CROs and a few full service 
CROs with global operations. Covance believes there are currently only 
approximately 20 CROs with revenues in excess of $30 million and only four 
with revenues in excess of $100 million. As a general matter, the clinical 
CRO industry is not capital intensive and the financial costs of entry into 
the industry are relatively low. Although there are few barriers to entry for 
small, limited-service providers, Covance believes that there are significant 
barriers to becoming a full service CRO with global operations. These 
barriers include the cost, infrastructure and experience necessary to own and 
manage multiple international offices to serve the global demands of clients; 
develop sophisticated drug development processes; develop broad therapeutic 
expertise; conduct trials that accelerate the transition from preclinical to 
clinical trials; manage complex clinical trials involving large patient 
populations in numerous countries simultaneously; provide health economic 
services; and prepare multinational regulatory submissions. Capital 
requirements, however, are relatively high for CROs that provide 
sophisticated preclinical and central laboratory and data management services 
and biomanufacturing services. 

Trends Affecting the CRO Industry 

   In 1994 worldwide expenditures on research and development by 
pharmaceutical and biotechnology companies are estimated to have been $30 
billion, of which Covance estimates $20 billion was spent on drug development 
activities of the type offered by the CRO industry. Covance believes that 
approximately $3 billion of such spending was outsourced to CROs primarily 
for preclinical testing and clinical development. 

   Covance believes that the outsourcing of drug development activities by 
pharmaceutical and biotechnology companies has been increasing and will 
continue to increase for the following reasons: 

   Cost Containment Pressures. Market forces and governmental initiatives 
have placed significant downward pressure on pharmaceutical and biotechnology 
companies' drug prices. Pressures on profit margins have arisen from 
increased competition as a result of patent expiration, market acceptance of 
generic drugs, the need for truly innovative rather than "me too" drugs and 
governmental and private efforts to reduce health care costs, especially in 
the United States. In addition, private managed care organizations are 
beginning to limit the selection of drugs that affiliated physicians may 
prescribe, thereby further increasing competition among pharmaceutical and 
biotechnology companies. Covance believes that the pharmaceutical industry is 
responding to these pressures by downsizing its research and development 
infrastructure and converting the fixed costs of maintaining such 
infrastructure to variable costs by outsourcing drug development activities 
to CROs. The downsizing of development capabilities also creates demand for 
CROs as biopharmaceutical companies experience internal development resource 
shortages when a large number of compounds emerge from the research process 
and need to undergo development. Moreover, many of these companies are 
attempting to decrease the new drug development cycle by using CROs, which 
may have greater expertise in a therapeutic area, while offering greater 
efficiency at a lower cost. Some large pharmaceutical and biotechnology 
companies now contract with large full service CROs under a single multi-year 
master agreement which allows the company to select the CRO for a broader 
array of drug development services instead of separately contracting 
individual studies or specific phases to several different CROs. The 
establishment of a master agreement itself can expedite the development 
process by avoiding the delay inherent in negotiating and reviewing separate 
agreements for each new study. Accordingly, once selected by a pharmaceutical 
company, the CRO can commence work promptly. Covance has executed a number of 
master agreements with large pharmaceutical companies and believes that it is 
in an advantageous position to enter into such agreements with additional 
pharmaceutical companies. 

   Marketplace Globalization. Pharmaceutical and biotechnology companies are 
increasingly attempting to expand the market for new drugs by pursuing 
regulatory approvals in multiple countries simultaneously rather than 
sequentially as they have in the past. Expanding the market for a drug is 
particularly important to the industry because of limited patent lives and 
the high development costs of new drugs. To gain access to the global 
marketplace, pharmaceutical and biotechnology companies are increasingly 
outsourcing development work to 

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CROs that are deployed in key geographical markets worldwide and that are 
capable of coordinating concurrent regulatory approvals. In addition, these 
companies are increasingly using CROs that have the systems in place to 
compile and analyze large volumes of complex data from multinational clinical 
trials and prepare regulatory submissions simultaneously on a multinational 
basis. Pharmaceutical companies also are outsourcing an increasing number of 
large scale Phase III-IV studies involving thousands of patients which are 
often simultaneously conducted in multiple jurisdictions including Europe, 
North and South America, Australia and Asia. Covance believes that CROs with 
a global presence will continue to benefit from these trends. 

   Revenue Enhancement Through Faster Drug Development. Pharmaceutical and 
biotechnology companies are increasingly attempting to reduce the time 
required to bring new drugs to market. Reducing the time it takes to market a 
new drug can reduce costs and accelerate revenue realization. Currently, 
successfully developing a new drug takes approximately 8 to 12 years, which 
generally represents a significant portion of the drug's 15 to 20 year period 
of protection under most patent laws internationally (17 years in the United 
States). Industry data suggest that it generally costs between $291 million 
and $597 million to discover and develop a drug in the United States. 
Accordingly, pharmaceutical and biotechnology companies are increasingly 
examining the drug development process itself to determine ways to reduce the 
time required to bring a new drug to market. As part of this evaluation, some 
companies are establishing time goals for how long the process should take. 
Covance believes that CROs, by providing specialized development services, 
are often able to perform the needed services with a higher level of 
expertise or specialization, and more quickly, than a pharmaceutical or 
biotechnology company could perform such services internally. In addition, 
Covance believes that CROs with advanced global drug development processes 
will be more attractive to pharmaceutical and biotechnology companies. 

   Consolidation in the Pharmaceutical Industry. The pharmaceutical industry 
is consolidating as pharmaceutical companies seek to obtain cost reduction 
synergies through business combinations. Recent consolidations include some 
of the largest multinational pharmaceutical companies in the world, such as 
American Home Products-American Cyanamid Company, Glaxo-Wellcome, 
Roche-Syntex, and Pharmacia and Upjohn. Ciba-Geigy and Sandoz have also 
announced their intention to merge and form a new company, Novartis. Once 
consolidated, many pharmaceutical companies aggressively manage costs by 
reducing jobs, decentralizing the research and development process, and 
outsourcing to CROs in an effort to reduce the fixed costs associated with 
internal drug development. Covance believes that full service global CROs 
will benefit from this trend. 

   Increasingly Stringent Regulation; Need for Capabilities. Increasingly 
stringent regulatory requirements throughout the world and their 
standardization have increased the need for broader, global regulatory 
expertise. As regulatory requirements become more stringent and the need for 
sophisticated capabilities becomes more important, including regulatory 
services and advice and global drug development processes, the pharmaceutical 
and biotechnology industries are outsourcing to global CROs to take advantage 
of their capabilities and geographic presence. 

   In addition to increasingly stringent regulatory requirements, Covance 
believes that recent efforts to develop global harmonized regulatory 
standards will increase the importance of advanced global drug development 
processes among CROs. In recent years, the FDA and the corresponding 
regulatory agencies of Canada, Japan and Europe have had substantive 
discussions for the purpose of developing harmonized standards for both the 
conduct of preclinical and clinical studies and the format and content of 
applications for new drug approval. Further, the FDA encourages the use of 
computer assisted filings in an effort to expedite the approval process. 
Covance believes that CROs which stay abreast of the changing regulatory 
requirements in multiple international jurisdictions and which are able to 
rapidly improve their drug development processes will have a competitive 
advantage. 

   Therapeutic Focus. Covance believes that the economics of the marketplace 
require research and development expenditures as biopharmaceutical companies 
become focused on innovative new products, including drugs for an aging 
population and drugs for the treatment of chronic disorders and 
life-threatening conditions such as cancer, heart disease and infectious 
diseases, including AIDS. The development of therapies for chronic disorders, 
such as Alzheimer's disease or arthritis, requires complex clinical trials to 
demonstrate the therapy's effectiveness and to determine whether the drug 
causes any long-term side effects. Covance believes that CROs with the 
requisite therapeutic experience and the ability to manage complex trials 
will present an attractive development alternative for biopharmaceutical 
companies. 

   Biotechnology Industry Growth. The U.S. biotechnology industry has grown 
rapidly over the last 10 years and is introducing new therapies which require 
regulatory approval. Many biotechnology companies do not have 

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the necessary internal resources and experience (capital, equipment or 
people) to conduct preclinical studies and clinical trials. Accordingly, many 
biotechnology companies have chosen to outsource to CROs rather than expend 
significant time and resources to develop an internal preclinical or clinical 
development or biomanufacturing capability. In addition, Covance believes 
that many biotechnology companies are turning to certain CROs for 
sophisticated regulatory expertise and will also outsource manufacturing of 
their experimental compounds during the preclinical and clinical stages. 
Moreover, the biotechnology industry is rapidly expanding into Europe, and 
Covance believes that significant growth opportunities exist for CROs with an 
international presence. Further, Covance believes that the biotechnology 
companies will enter into single multi-year master agreements with CROs, as 
pharmaceutical companies have done. Covance has been serving one of the 
largest biotechnology companies for over a year pursuant to such an agreement 
and believes that it is in an advantageous position to enter into additional 
master agreements with other biotechnology companies. 

   Consolidation in the CRO Industry. As a result of competitive pressures 
and the trend towards larger and more global studies, the CRO industry is 
consolidating. For instance, two of the largest CROs, Applied Bioscience 
International Inc. ("APBI") and Pharmaceutical Product Development Inc. 
("PPD"), recently completed their merger. Such mergers and acquisitions have 
resulted in the emergence of a few large, full service CROs that have the 
capital, technical, financial and human resources to conduct all phases of 
preclinical and clinical trials on behalf of pharmaceutical and biotechnology 
companies. As pharmaceutical and biotechnology companies increasingly 
outsource development, they may turn to large CROs that provide a broad range 
of preclinical and clinical services, while at the same time they may also 
limit the number of CROs they choose to provide such services. Covance 
believes that this trend will further concentrate market share among large 
CROs with a reputation for quality, efficiency, flexibility, responsiveness 
and overall development experience and expertise and that Covance will 
benefit from this trend. 

Business Strategy 

   Covance believes it is one of the largest CROs serving the biotechnology 
and pharmaceutical industries, based on estimated 1995 net revenues, and has 
a focused strategy to provide high quality, cost effective, integrated, 
comprehensive and innovative services to assist its pharmaceutical and 
biotechnology clients develop, produce, obtain approval for and enhance the 
commercial success of their new therapeutic products worldwide. Covance has 
and will continue to execute this strategy by: hiring and retaining the best 
people available in terms of knowledge, ability and customer-focused 
attitude; continually improving its existing services and creating new 
services that respond to the demands of the biotechnology and pharmaceutical 
industries; continually improving its drug development processes; and 
selectively expanding into new locations. Covance expects that these 
improvements or additions will occur as the result of internal expansion and 
development activity, through continued linking of Covance's various services 
and through strategic acquisitions. 

   Personnel. Covance is guided by a senior management team of experts in 
drug development who in many cases have had previous careers in the relevant 
industries served by Covance, providing them insight into what Covance's 
clients need and expect from a full service CRO. Moreover, Covance has a 
performance management system that involves an interactive annual objective 
process, career development plan and annual review process designed to focus 
on both individual strengths and opportunities for growth. In general, 
Covance seeks to retain and hire the best-qualified individuals for all 
aspects of its operations, emphasizing the need for experience and a customer 
focus. Covance provides its employees with the necessary resources for 
achieving these goals, including information technology and internal and 
external training programs to enable them to more effectively perform their 
jobs. 

   Services. Covance is a full service CRO that provides a broad array of 
product development services to the biotechnology, pharmaceutical and medical 
device industries. In addition, and to a lesser extent, Covance provides 
services such as health economics for managed care organizations, hospitals 
and health care provider networks and early development and laboratory 
testing services to the chemical, agrochemical and food industries. Covance 
believes that CROs capable of offering a full range of drug development and 
manufacturing services are better able to compete for three reasons: (1) a 
full range of services provides a client with the choice of using just one 
provider to secure all of the client's development needs; (2) an integrated 
provider of these services can provide economies of scale and accelerate the 
development of the client's product through more comprehensive planning of 
the development process; and (3) early stage development provides the CRO 
with access to the client sooner in the development cycle and may promote the 
client's use of later stage development services. 

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   As part of its strategy, Covance both continually improves its existing 
services and endeavors to create new ones. Covance has implemented a total 
quality management system throughout its operations which assists the company 
in its goal of producing error-free services on time and within the client's 
budget. This management system is overseen by a quality team comprised of 
Covance's most senior executives, including its chief executive officer. This 
team meets regularly to set quality goals, to determine whether such goals 
are being met and to discuss initiatives that should be implemented to 
improve the quality of its services. As an important supplement to Covance's 
quality management system, certain of Covance's U.S. and European 
subsidiaries have received ISO 9000 and 9001 certifications based on quality 
standards established by the International Organization for Standardization. 
The ISO 9000 standards define the international requirements for creating a 
quality assurance system that will result in providing consistent service. 

   An example of Covance's efforts to continuously improve its existing 
services is the Expanded Access Program ("EAP"), one of Covance's 
periapproval offerings. EAP is a mechanism that allows innovative new 
therapies for life threatening diseases to be given to expanded populations 
prior to FDA approval pursuant to a TIND. See "-- Services--Clinical and 
Periapproval Services--Treatment Investigational New Drug Applications." In 
addition to improving its existing services, Covance also focuses on 
providing its clients new market oriented, value-added services. Some of 
these involve integrated services that rely on multidisciplinary teams drawn 
from various Covance operating units or divisions. For instance, Covance is 
duplicating in the United States a Strategic Product Development ("SPD") 
program developed in Europe that has successfully reduced the estimated time 
from preclinical testing to the first human studies. See 
"--Services--Preclinical Services." 

   Covance's new service offerings arise as a result of both "home-grown" 
activities and through strategic acquisitions. With respect to the former, in 
addition to SPD, Covance has invested in the creation of a multi-use 
biomanufacturing facility, Covance Biotechnology. See 
"--Services--Biomanufacturing." With respect to the latter, Covance added 
domestic clinical packaging capabilities through the acquisition of National 
Packaging Systems, Inc. in January 1995, European clinical packaging 
capabilities through the acquisition of CRS Pacamed in October 1996 and 
enhanced its health economics services by acquiring HTA in March 1996. 
Covance expects to continue developing services internally and making 
strategic acquisitions that are complementary to its existing services and 
that will expand its ability to serve its clients. 

   Streamlining the Drug Development Process. Covance believes that when 
selecting CROs to conduct trials the biopharmaceutical industry will become 
more demanding with respect to factors such as containing costs, reducing 
testing time frames and being able to conduct trials on a global basis. For 
CROs to become more efficient, with the resultant savings in time for 
clients, the drug development process itself will undergo continuous change. 
In recognition of this, Covance has created a dedicated team focused 
exclusively on redesigning the drug development process with the objective of 
reducing the time required to develop a new compound. The mandate of this 
team is to examine every significant process, system and information 
technology used in product development with the objective of applying the 
considerable experience and technical resources available throughout Covance. 
Currently, Covance has over 300 information systems professionals working in 
12 regional information system centers (nine in the United States and three 
in Europe) and nine satellite centers (five in the United States and four in 
Europe). All of Covance's employees at its 33 locations (both domestic and 
international) and miniframe computers and thousands of desktop computers are 
connected by a wide area network that provides global access to the expertise 
and technologies resident in the regional information system centers. These 
systems also support Covance's ability to provide integrated services and 
connect Covance to its clients. For instance, Covance's Information Access 
System permits clients to obtain real time access to their study data, and 
its drug management system based on Integrated Voice Response technology 
allows clients to more efficiently manage the distribution of their 
experimental compounds to investigational sites. See "--Services--Clinical 
and Periapproval Services-- Clinical Development Technologies." 

   In examining ways to improve the drug developmental process, Covance's 
information technology strategy is to capitalize on its existing 
heterogeneous, flexible and proprietary computer systems, which are 
time-proven through thousands of trials, and to both customize them where 
appropriate for particular client needs and incorporate new systems and 
technologies to meet changing demands in a timely and cost effective manner. 

   Geographic Expansion. Covance believes that it will become increasingly 
important to provide its full range of drug research and development services 
in all major and developing biotechnology and pharmaceutical markets, 
especially given industry trends to conduct research on new drugs outside the 
United States first and to conduct 

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clinical trials in multiple countries simultaneously. Covance has a tradition 
of serving its clients throughout the world. Through its offices, regional 
monitoring sites, laboratories and manufacturing sites in over 33 locations 
in 15 different countries and field work in 11 other countries, Covance 
believes it is a leader among CROs in its ability to deliver services 
globally. Currently, approximately 30% of Covance's 5,000 - person work force 
is based outside of the United States. 

   Covance will continue its strategy of establishing new or enhancing 
existing operations in significant biotechnology and pharmaceutical markets. 
Covance expects this will occur as the result of internal growth and through 
strategic acquisitions. For instance, Covance opened its Singapore office in 
April 1996. Singapore will serve as Covance's center for conducting clinical 
trials in Asia, a region that Covance believes will be increasingly important 
for the research, development and therapeutic use of drugs. Given the need in 
Asia to set processes and standards for conduct of clinical trials that meet 
international standards, and the Singapore government's desire to be the 
Asian center for human drug development and research, Covance is 
collaborating with the Singapore National Science and Technology Board 
concerning the Singapore government's initiative to form the Asia Pacific 
Economic Cooperation coordinating center for Good Clinical Practice. Covance 
is also discussing with its clients opening new offices in Latin America and 
Canada to serve their growing need to conduct drug development studies in 
these areas. 

Services 

   Covance is a leading CRO providing a wide range of integrated product 
development services on a worldwide basis to the biotechnology, 
pharmaceutical and medical device industries. In addition, and to a lesser 
extent, Covance provides services such as health economics for managed care 
organizations, hospitals and health care provider networks and early 
development and laboratory testing services to the chemical, agrochemical and 
food industries. The foregoing services constitute six lines of business: 
preclinical, biomanufacturing, clinical and periapproval, central laboratory, 
clinical packaging and health economics. 

  Preclinical Services 
   Covance believes that it is one of the largest independent providers of 
preclinical drug safety assessment and analytical chemistry services. With 
four major laboratories, employing over 1,900 people, located in Madison, 
Wisconsin, Vienna, Virginia, Harrogate, England, and Munster, Germany and 
with an administrative office in Tokyo, Japan, Covance conducted 
approximately 1,000 toxicology studies in 1995. The preclinical services 
offered are wide-ranging, including in vivo toxicology studies (such as 
acute, subchronic and carcinogenicity studies), genetic toxicology studies 
(such as in vitro cytotoxicity, cytogenetics and gene mutation studies and 
transgenic mouse models) and chemistry services (such as in vitro metabolism, 
pharmacokinetics and bioequivalence studies). 

   The preclinical area has also been a source of innovation by introducing 
new technologies for client access to data, electronic animal identification, 
multimedia study reports and data tables and in vivo and in vitro measures of 
induced cell proliferation. Covance's preclinical group also works closely 
with its Phase I and II groups to minimize product development time and to 
provide clients with early data on the safety and efficacy of new molecules. 
This data allows clients to make a decision about whether to continue, cease 
or modify their development program. See "--Business Strategy--Services." 

   As part of its preclinical services, Covance is duplicating in the United 
States an SPD program developed in Europe that has successfully reduced the 
time from preclinical testing to the first human studies. SPD involves an 
integrated process and team drawn from Covance's preclinical and Phase I and 
II areas. In an SPD program, the compound is researched from initial 
preclinical evaluation through its first dosing in humans, including the 
filing and attainment of the IND. Specific elements of the process include 
formulation and dose delivery testing, product metabolism, chemistry, 
pharmacology, toxicology and safety testing. Through clearly defined 
objectives, plans, timetables, and coordination with clients, Covance has 
used SPD in the United Kingdom (where INDs are not required to commence Phase 
I clinical trials) on over 10 compounds and has averaged just six months to 
nine months from the start of preclinical testing to the start of a Phase I 
clinical trial. In one example, the entire preclinical testing phase was 
completed in 4-1/2 months with the Phase I clinical trial concluding just 
five months thereafter. The preclinical testing phase in the United States 
typically takes six months to three years and Phase I studies typically take 
six months to one year. Because INDs are required in the United States to be 
filed before human clinical trials start, it is uncertain whether SPD trial 
completion speeds in the United States will be as swift as in the United 
Kingdom, but Covance believes that an SPD program will reduce the drug 
development time in the United States. 

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   Covance also provides animals, including purpose-bred animals, for 
biomedical research. These animals are used by biopharmaceutical companies, 
university research centers and CROs, like Covance, as part of their 
preclinical in vivo safety and efficacy testing. Often, these preclinical 
studies require animals which are free of genetic anomalies to assure that 
results from the testing are accurate. In addition, animals will often need 
to be free of all pathogens, again, to ensure the integrity of the testing 
results. Through a variety of processes, technology and specifically 
constructed facilities, Covance is able to provide both purpose-bred and 
specific pathogen free animals that will meet the clients' rigorous control 
requirements. Covance is also a provider of custom polyclonal and monoclonal 
antibody services and recently opened an 18,000-square-foot state-of-the-art 
antisera production facility that complies with both GMP and GLP. Finally, 
although Covance's animal breeding facilities maintain procedures in 
accordance with applicable government regulations and company policies for 
the quarantine and handling of imported animals, including primates, there is 
a risk that these animals may be infected with diseases that may be harmful 
and even lethal to themselves and humans. In 1996 Covance, with the approval 
of the Texas Department of Health and the Centers for Disease Control, 
destroyed a shipment of monkeys from the Philippines because some had been 
infected with a sub-strain of the Ebola-Reston virus, which is lethal to 
monkeys. 

   Outside the area of biopharmaceutical development, Covance also provides 
early development and laboratory testing services to the chemical, 
agrochemical and food industries. For instance, Covance offers a complete 
range of services to agrochemical manufacturers to determine the potential 
risk to humans, animals and the environment from plant protection products. 
Further, Covance offers a broad range of services to the food industries 
including nutritional analysis and nutritional content fact labels. 

   
  Biomanufacturing 
   Covance holds a majority interest in Covance Biotechnology, a company 
formed in 1995 to manufacture peptides and recombinant proteins for 
biotechnology and pharmaceutical clients in accordance with GMP for 
preclinical and clinical trials as well as for commercial sales. Covance 
Biotechnology's services will include process development services, GMP 
manufacturing by microbial and mammalian cell expression, laboratory testing, 
quality assurance and quality control and regulatory affairs assistance. 
Covance Biotechnology expects to lease and commence operations by the end of 
1996 in a biomanufacturing facility located in Research Triangle Park, North 
Carolina. Covance Biotechnology will be able to process multiple compounds 
for multiple clients simultaneously and on a scale, Covance believes, greater 
than any other contract bioprocessor. Covance Biotechnology provides an 
alternative for clients who might otherwise need to design, finance and 
construct their own facility to manufacture a compound for preclinical or 
clinical trials or commercial sale. By hiring Covance Biotechnology, a client 
can avoid the expense, time delay and risk of making additional investments 
for a compound whose safety, efficacy and commercial opportunities are 
uncertain. This allows clients to preserve their capital and lower their 
risks. See "Risk Factors--Risk Factors Relating to 
Covance--Biomanufacturing--New Business Venture." 
    

   Outsourced biomanufacturing is a relatively new industry and as such 
companies in this industry are subject to all of the risks inherent in a new 
or emerging industry, including changes in the regulatory regime, an absence 
of an established earnings history, the availability of adequately trained 
management and employees, and the potential for significant client 
concentration. In an attempt to enter this industry at an early stage of its 
development, Covance Biotechnology has hired personnel from the 
biopharmaceutical industry experienced in biomanufacturing. 

   As a start-up venture, Covance Biotechnology is subject to the risks 
inherent in the establishment of a new business enterprise, including, among 
others, unanticipated construction delays, operational and manufacturing 
problems, additional and unforeseen costs and expenses and an inability to 
attract and retain clients. There can be no assurance that, even after the 
expenditure of substantial funds and efforts, Covance Biotechnology will be 
able to market successfully its biomanufacturing services. Covance 
Biotechnology's biomanufacturing facility is still under construction and is 
expected to be "mechanically" completed during the fourth quarter of 1996. 
Mechanical completion occurs when all structural aspects of the facility are 
complete, all mechanical equipment and systems are installed and a 
certificate of occupancy has been issued by an applicable governmental 
authority. After mechanical completion, the facility must be "validated," 
which means that the various equipment, systems and procedures that are 
required to manufacture a biologic must be thoroughly tested and reviewed. 
Although Covance Biotechnology has submitted proposals to a number of 
prospective biopharmaceutical clients, it has been awarded only one contract, 
but has signed a number of letters of intent for the provision of services. 
For the period ended December 31, 1995, Covance Biotechnology reported a net 
loss of approximately $1.9 million, and for the nine months ended September 
30, 1996, Covance Biotechnology reported a net loss of approximately $2.3 
million. 

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   The biomanufacturing facility is being financed through several tax 
retention operating leases provided by the Bank and, during the construction 
phase, is being leased by the General Contractor. The leases expire 10 years 
from the date of mechanical completion of the facility. The annual minimum 
lease payments are currently estimated at $5.5 million. At the expiration of 
the lease term Covance Biotechnology is liable for the unamortized balance of 
the cost of the facility, currently estimated to be approximately $37 
million. Covance Biotechnology may also choose to purchase the facility at 
specific dates over the 10 year period. Using current estimates, the purchase 
price would be approximately $54 million at the end of the first year, 
decreasing on an amortizing basis to approximately $37 million at the end of 
the tenth year. 

   Covance owns 76% of the voting capital stock of Covance Biotechnology in 
the form of convertible preferred stock (the "Covance Biotechnology Preferred 
Stock"). The remaining 24% of Covance Biotechnology's capital stock is owned 
by certain minority stockholders (the "Minority Stockholders") in the form of 
common stock. Covance's ownership in Covance Biotechnology could be reduced 
to as much as 68% of the voting capital stock if certain options granted to 
key Covance Biotechnology executives to acquire Covance Biotechnology common 
stock owned by Covance are exercised in full. The Covance Biotechnology 
Preferred Stock held by Covance entitles Covance to a 12% annual cumulative 
dividend. No dividend has been paid on the Covance Biotechnology Preferred 
Stock. Dividends on the Covance Biotechnology Preferred Stock become payable 
only if Covance Biotechnology has profits and to the extent that the Covance 
Biotechnology board of directors declares the payment of dividends. Covance 
currently does not anticipate the receipt of any such dividend until and 
unless Covance Biotechnology becomes profitable. 

   Covance Biotechnology, Covance and the Minority Stockholders entered into 
a capital contribution and shareholder agreement (the "Agreement"), which, 
among other things, limits the persons to whom the Minority Stockholders may 
transfer their Covance Biotechnology common stock, grants Covance a right of 
first refusal with respect to the transfer of Covance Biotechnology common 
stock held by the Minority Stockholders, grants Covance the right to purchase 
up to one third of the Covance Biotechnology common stock held by the 
Minority Stockholders on each of the second, third and fourth anniversary of 
the completion of the construction of the facility or, if Covance chooses not 
to exercise this right, obligates Covance Biotechnology to use its best 
efforts to arrange for the sale of such shares on certain specified terms, 
and provides for the Minority Stockholders the right to nominate up to two 
directors of Covance Biotechnology to the extent that the Minority 
Stockholders own, in the aggregate, greater than 50% of their initial equity 
position in Covance Biotechnology. The Agreement also contains certain 
provisions which restrict the circumstances and set forth the terms and 
conditions upon which Covance may provide additional capital or funds to 
Covance Biotechnology. Covance has no affirmative obligation to provide 
further funds or financial assistance of any kind to Covance Biotechnology. 

Clinical and Periapproval Services 
   Covance offers a comprehensive range of clinical trial services, including 
Phase I through III clinical studies and periapproval studies including Phase 
IIIb and Phase IV clinical studies, TINDs, post-marketing surveillance 
studies and prescription to over-the-counter switch studies ("Rx to O-T-C 
Switch"). Covance also has extensive experience in a number of therapeutic 
areas, including diseases of the cardiovascular and central nervous systems, 
endocrinology and respiratory systems, infectious diseases (including AIDS), 
and significant experience in other areas including oncology, bone metabolism 
immunology, gastroenterology, urology, dermatology and hematology. Covance 
has extensive experience in managing both small, medium and large trials in 
the United States and in many parts of the world, including Australia, 
Canada, Western, Central and Eastern Europe, Israel, Mexico and Russia. These 
trials may be conducted separately or simultaneously as part of a 
multinational development plan. In 1995 Covance completed 135 Phase I studies 
involving over 2,900 study patients through two clinical research facilities, 
a 60-bed facility in Madison, Wisconsin and a 60-bed facility in Leeds, 
England; 113 Phase II and III studies involving over 26,900 study volunteers 
and 2,100 investigational sites; and 42 Phase IIIb - IV clinical and other 
periapproval studies involving approximately 8,400 study sites and 
approximately 53,000 study patients. Through 1995, Covance has cumulatively 
been involved in 14 TINDs involving over 2,600 investigational sites and over 
25,000 patients. In addition, Covance has cumulatively conducted over 625 
Phase IIIb - Phase IV studies through 1995 involving approximately 20,000 
investigational sites and over 215,000 patients; over 34 post-marketing 
studies through 1995 involving over 74,000 investigational sites and over 
480,000 patients; and three Rx to O-T-C Switch studies through 1995 involving 
over 3,000 investigational sites and over 10,000 patients. 

   Covance can manage every aspect of the foregoing types of trials by 
providing its clients the following services: clinical development plans and 
protocol design, consulting services (clinical and data management, 
regulatory 

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advice, information systems and drug development strategy), site, 
investigator and patient enrollment, preparation and submission of TINDs, 
INDs, European study permissions, NDAs, computer assisted NDAs ("CANDAs"), 
product license applications ("PLAs"), computer assisted PLAs ("CAPLAs") and 
European submission dossiers, computerized patient randomization and dose 
assignment and tracking, Phase I - Phase IV study design and implementation, 
monitoring and safety evaluation management and reporting, data processing 
and management, statistical analyses and report writing, medical writing, GCP 
and GMP audits and, through its relationship with Bio- Imaging, medical image 
digitization and processing. Clinical trials are managed by a dedicated 
project team, which, in each case, is led by a project director who 
supervises all aspects of the clinical trial. 

   The following is a description of the core services Covance provides, 
either on an individual or integrated basis depending on client needs, as 
part of conducting clinical trials: 

   
     Study Design. Covance serves its clients in the critical area of study 
   design by applying its wide development experience in the preparation of 
   study protocols and case report forms ("CRFs"). The study protocol defines 
   the medical issues to be examined in evaluating the safety and efficacy of 
   the drug under study, the number of patients required to produce 
   statistically valid results, the clinical tests to be performed in the 
   study, the time period over which the study will be conducted, the 
   frequency and dosage of drug administration and the exact inclusion and 
   exclusion criteria to be met for the patients enrolled in the study. The 
   success of the study depends not only on the ability of the protocol to 
   accurately reflect requirements of regulatory authorities, but also on the 
   ability of the protocol to fit coherently with the other aspects of the 
   development process and the ultimate marketing strategy for the drug. This 
   includes outcomes and pharmacoeconomic concerns and reimbursement 
   planning. See "--Health Economics." 
    

     Once the study protocol has been finalized, CRFs must be developed to 
   record the desired information to be obtained from the clinical studies. 
   The various other disciplines involved in the drug development process, 
   including data management, statistics and regulatory affairs, must work 
   closely with the clinical trial management project team to assure that the 
   right data are acquired in a form which is most efficient for subsequent 
   data entry, management analyses and reporting. Proper CRF design is 
   critical to allowing investigators and field monitors to conduct their 
   respective jobs quickly, accurately and effectively. 

     Investigator Recruitment. During the clinical trials, administration of 
   the drug to patients is supervised by physicians, also referred to as 
   investigators, at hospitals, clinics or other locations, also referred to 
   as investigational sites. Covance solicits the participation in the study 
   of investigators who contract directly with either Covance or its client. 
   The successful rapid identification and recruitment of investigators who 
   have the appropriate expertise and an adequate base of patients who 
   satisfy the requirements of the study protocol are critical to the timely 
   completion of the trial. Covance maintains and continually expands and 
   refines its computerized database of approximately 30,000 investigators. 
   Information regarding Covance's experience with these investigators, 
   including factors relevant to rapid study initiation, are contained in the 
   database. This information allows project managers to choose the 
   appropriate investigators for a particular study in an efficient manner. 
   In addition, Covance has worked with approximately 25,000 general 
   practitioners in connection with the conduct of Phase III and IV studies. 

     Study Monitoring. Covance provides study monitoring services which 
   include investigational site initiation, patient enrollment assistance and 
   data collection through subsequent site visits. These visits also serve to 
   assure that data are gathered according to GCP, the requirements of the 
   client, as specified in the study protocol or otherwise, and applicable 
   regulations. Project management and monitoring services are the 
   operational center of all clinical studies. In most instances a project 
   will meet, exceed or fail to meet expected timeliness for completion based 
   on meeting deadlines during the first few months of study initiation. 
   Therefore, Covance focuses at an early stage on identifying and quickly 
   completing the critical rate-limiting steps of screening and selecting 
   investigators, processing pre-study regulatory paperwork, obtaining 
   institutional review board approvals and scheduling investigational site 
   initiation visits. Drugs under study cannot be released to the 
   investigational sites, and, thus, the study cannot begin until these 
   activities have been completed. 

     Clinical Data Management and Biostatistical Analysis. Covance's data 
   management and biostatistical analysis operations are managed by 
   professionals with extensive pharmaceutical and biotechnology industry 
   experience in the design and construction of local and multinational 
   clinical trial databases. Data management and biostatistical analysis 
   services are offered as discrete products and as part of an integrated 
   drug 

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   development program. During the design of development plans and protocols, 
   Covance offers consulting services relating to, and the determination of, 
   sample size parameters for patient enrollment, development of data 
   analysis plans and randomization schemes. During the conduct of clinical 
   trials, Covance assists in the rapid acquisition of clean and accurate 
   data. Following completion of the clinical trials, Covance assists in 
   report preparation and regulatory submissions. Covance's biostatisticians 
   may participate with clients in meetings with the FDA to present and 
   discuss biostatistical analyses prepared by Covance. Covance has expertise 
   in electronically capturing and integrating geographically diverse data. 
   Covance employs a variety of software, which may be specified by clients 
   or combined with customized programs developed by Covance. 

     Drug development time is reduced by performing data management and 
   biostatistical analysis activities in parallel with other drug development 
   activities where possible. For example, data management personnel work as 
   part of an integrated team with clinical program managers and field 
   monitors to continuously enter data, program output tables and listings 
   and validate the database so that there is a rapid progression from "data 
   lock," to "database freeze," to final tables and listings preparation and 
   to biostatistical analyses. Similarly, there is a close working 
   relationship with medical writing and regulatory services personnel. 

     Clinical Development Technologies. To expedite the drug development 
   process and to help reduce costs, Covance has created a proprietary drug 
   management system based on an Interactive Voice Response System ("IVRS") 
   and an Information Access System ("IAS"), which are interactive 
   information technologies. IVRS uses touch-tone telephone technology to 
   assist biopharmaceutical clients in managing the "just-in-time" delivery 
   of clinical drug supplies and patient randomization. IVRS is available in 
   multiple languages using toll free numbers and has, in some cases, 
   demonstrated up to 30% reduction in study drug waste. IAS, based on Lotus 
   Notes shareware, provides clients with 24-hour access to study data, such 
   as study patient enrollment progress, patient visit information, CRF 
   status and serious adverse event experience. In another example, by 
   incorporating new optical scanning technology and redesigning the 
   development process for a 40,000-patient Phase IV clinical trial involving 
   900 investigators, Covance was able to decrease the per patient study cost 
   by approximately 60%. 

     Medical Writing and Regulatory Services. Covance provides medical report 
   writing and regulatory services to its clients in a manner designed to 
   complement parallel development processes to reduce overall development 
   time. Strategic plan and protocol design services provided at the 
   beginning of a project, combined with clear, concise data presentation, 
   analysis and discussion at the completion of the project assist the client 
   in obtaining regulatory approvals. These services are fully integrated 
   with Covance's other services to assure maximum speed consistent with good 
   service and regulatory compliance. Services in this area include 
   integrated clinical/statistical reports, manuscripts, risk/benefit 
   assessment reports, package inserts, quality assurance and environmental 
   risk assessments. Through 1995, Covance has prepared a total of 79 INDs or 
   their equivalent. In addition, through 1995, Covance has cumulatively 
   prepared 66 NDAs, or their equivalents, in the United States or abroad, of 
   which 47 NDAs, or their equivalents, in the United States or abroad are 
   pending and 19 NDAs, or their equivalents, have been approved in the 
   United States and abroad. Further, Covance believes it was one of the 
   first CROs to develop CANDAs and CAPLAs, and Covance worked on two such 
   applications in 1995 and has completed nine such applications since their 
   inception in 1987. 

     Although Covance's clinical regulatory affairs group typically conducts 
   GCP and GMP audits as part of its overall involvement in a clinical trial, 
   because of the experience and reputation of this group, it is common for 
   the group to be hired independently by a sponsor to conduct such audits. 
   Governmental agencies have also recognized the ability of Covance's 
   regulatory affairs group. Hired by an intermediary, Covance worked in 1992 
   with the European Commission (Directorate General III) on a study 
   concerning the establishment and operations of the then proposed European 
   Medicines Evaluation Agency ("EMEA"), Europe's rough analogy to the FDA. 
   The EMEA became operational on January 1, 1995, and Covance's head of 
   European clinical regulatory affairs was listed as a co-author of the 
   report. In another example, Covance was hired in 1995 by an intermediary 
   to advise the National Drugs Advisory Board in Ireland concerning the 
   recommended structure, systems and procedures for the then proposed 
   creation of the Irish Medicines Board, which was ultimately established in 
   January 1996. 

     Treatment Investigational New Drug Applications. The TIND is an 
   application by a pharmaceutical or biotechnology sponsor and the 
   associated procedure to allow broader populations of patients to receive 
   treatment with an investigational new drug for a serious or immediate 
   life-threatening disease, such as AIDS 

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   or cancer, for which no comparable or satisfactory therapy is available. 
   This treatment is provided during the clinical trial phase of development 
   but does not typically use controlled clinical trials. Covance has had 
   substantial experience with TINDs and has developed specialized systems 
   for prompt initiation and effective operation of TIND programs, such as 
   computerized patient screening, optical scanning of CRFs and drug 
   management systems. Other special TIND programs or systems involve 
   providing project specific information to physicians, patients and patient 
   advocacy groups, and data processing, management, analyses and reporting 
   systems. 

     Covance's EAP, which is conducted pursuant to a TIND, is a mechanism 
   that allows innovative new therapies for life-threatening diseases to be 
   given to expanded populations prior to FDA approval. In one recent 
   situation, a pharmaceutical company contacted Covance to conduct an EAP 
   for a promising new treatment for AIDS. The sponsor, who had little 
   experience with EAPs and had limited supply of the new drug, required that 
   the study be conducted on a global scale (21 countries simultaneously), 
   that enrollment of patients start rapidly (within 90 days of Covance's 
   selection as the CRO) and that all components of the study, including 
   project management, data management, regulatory support and drug supply 
   management, be integrated seamlessly worldwide. To accomplish the 
   sponsor's aggressive goals, Covance formed a multidisciplinary team drawn 
   from six different locations in the United States and Europe involving the 
   clinical and periapproval and the clinical packaging operations. After 
   redesigning the EAP processes, customizing existing technology and 
   employing new systems, Covance has been able to meet or exceed the 
   client's requirements without jeopardizing quality or increasing costs. 

     Other Periapproval Studies. Besides TINDs, Phase IIIb studies (involving 
   studies conducted after NDA submission but before regulatory approval is 
   issued) and Phase IV studies, Covance performs other types of periapproval 
   studies such as post-marketing surveillance studies and Rx to O-T-C Switch 
   studies. Post- marketing surveillance studies are epidemiologically based 
   evaluations of the use of products in actual medical practice using a 
   broad range of patients. Accordingly, these studies use practicing 
   physicians to evaluate primarily the safety profile of the product under 
   actual medical practice conditions. Post-marketing surveillance studies 
   are large, typically involving over 1,000 physicians and thousands of 
   patients, and usually focus on evaluating just a limited number of key 
   clinical outcomes, such as a particular side effect. In Rx to O-T-C Switch 
   studies, Covance gathers, on behalf of a sponsor, the necessary safety 
   data to obtain regulatory permission for the sale of its drug without the 
   need of a prescription. These studies are also large, well- controlled 
   programs. 

  Central Laboratory Services 
   Covance believes that the ability to conduct high quality and 
   sophisticated central laboratory services is an integral aspect of what 
   constitutes a full service CRO. Covance's two facilities (one located in 
   the United States and the other in Switzerland) provide central laboratory 
   services dedicated exclusively to biopharmaceutical studies. These 
   facilities, which have conducted over 60 million assays from the 
   specifications of more than 3,000 protocols and have collected data from 
   over 16,500 investigational sites, provide clients with combinable data in 
   studies that can be conducted separately or multinationally and 
   simultaneously. Providing combinable data eliminates the need for 
   statistical correlation among different laboratories by using consistent 
   laboratory methods, the use of same reagent manufacturers, and the use of 
   identical clinical trial reference ranges and equipment calibration. 
   Covance also employs a proprietary clinical trials management system, 
   which Covance believes is unique, that enables it to enter a sponsor's 
   protocol requirements directly into its own database. This system, based 
   on protocol requirements, constructs the drug kits that will go to the 
   investigational sites and the requisition forms therefor, allows for 
   proper laboratory specimen collection from the investigational site, 
   sequencing of study participants visits and investigator test ordering of 
   additional tests and ensures that all demographic data is complete and 
   accurate and will produce for the client reports that are customized to 
   their specifications. 

   The laboratories provide a comprehensive audit trail by ensuring that all 
   laboratory data are traceable to source documents, are capable of 
   delivering customized data electronically within 24 hours and provide 
   safety test results within 48 hours from most locations. As the need for 
   central laboratory services expands geographically, Covance has expanded 
   the reach of its central laboratories business through a contractual 
   arrangement with a leading South African laboratory that allows Covance to 
   combine the testing capability of this laboratory with its own proprietary 
   systems. Covance expects to continue to investigate other opportunities 
   for geographical expansion of its central laboratory service offerings. 

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  Clinical Packaging 
   Covance offers full service contract packaging for the pharmaceutical 
   industry in the United States and Europe including package development and 
   design, coldformed and thermoformed blister units, blister packaging, 
   multi-dose bottle filling, clinical labeling, storage and site 
   distribution of clinical supplies and return services for unused supplies. 
   With the addition of Covance Pharmaceutical Packaging Services AG, Covance 
   packaging services and products have been expanded to include software 
   inventory and validation controls and processes and the manufacturing of 
   robotic packaging machines. Covance believes that by integrating packaging 
   services with its other clinical and periapproval services it can 
   accelerate the drug development process through operational efficiencies 
   that arise from coordinating at the outset the design of a clinical trial. 

  Health Economics 
   Covance offers a wide range of health economic services for managed care 
   organizations, hospitals, health care provider networks and pharmaceutical 
   and device manufacturers. These services include outcomes and 
   pharmacoeconomic studies, reimbursement planning services and disease 
   management services. 

   Outcomes and Pharmacoeconomic Studies. In this area, Covance offers its 
   clients a full range of strategic and analytic services, including 
   strategic planning, quality-of-life assessment, and economic studies, 
   including feasibility studies, protocol and instrument design and data 
   analysis. Outcomes studies may be prospective, often conducted in 
   conjunction with clinical trials, or retrospective. Many 
   cost-effectiveness studies employ economic modeling techniques to evaluate 
   the full financial impact of new medical technologies. For example, among 
   the studies undertaken by Covance in 1995, Covance completed a cost- 
   effectiveness study for a medical device manufacturer to determine the 
   device's clinical effectiveness in treating brain metastases and to 
   compare the cost of such treatment with other therapies. Covance also 
   completed in 1995 several quality-of-life studies that determined various 
   products' impacts on patients' lives. For example, in a study on the 
   effects of a new treatment for amyotrophic lateral sclerosis (Lou Gehrig's 
   disease), Covance designed the measures for evaluating how treatment 
   affected a patient's ability to function on a daily basis. Through 1995, 
   Covance has designed over 100 outcomes and pharmacoeconomic studies. 

   When planning studies, Covance examines the audience for the study's 
   findings to determine which of the client's concerns (e.g., regulatory 
   approval, clinical acceptance, insurer coverage or insurer payment) might 
   be more fully informed by the availability of outcomes data, and then 
   determines how such data can be efficiently collected and communicated. 
   Covance typically involves academic and clinical experts to ensure that 
   appropriate techniques are used and to enhance study credibility and 
   acceptance. Covance designs most studies with a goal of publishing its 
   findings in respected, peer-reviewed journals. 

   Covance believes that given the changing competitive pressures affecting 
the pharmaceutical industry and the rising need to more rigorously 
demonstrate the value of particular drugs, both in their own right and 
compared to other drugs and treatment regimes, the ability to perform 
outcomes and pharmacoeconomic studies will become increasingly important. 

   Reimbursement Planning. Covance offers its customers strategic 
reimbursement and market planning services. These services enable clients to 
enhance the commercial success of their medical products. Covance analyzes, 
on behalf of the customer, who will pay for a medical product (e.g., 
third-party payors such as private insurance companies or federal programs 
like Medicare) and what economic barriers or opportunities exist for the 
product (e.g., claims coding, coverage policy, or payment amounts). This work 
typically involves evaluating government policies and, sometimes, leads to 
changes in those policies. In addition, Covance often offers its 
reimbursement planning activities in conjunction with its other services that 
evaluate existing and potential market size, pricing, distribution, and 
economic impact. 

   Through its Medical Technology Hotlines(R) division, Covance also provides 
full service reimbursement case management, including: (1) contacting 
insurers to investigate specific coverage and benefit matters, resolving 
denied claims and educating insurers; (2) assisting manufacturers in 
designing and effectively running their indigent patient programs, pursuant 
to which costly new products are made available to patients who cannot afford 
them because of inadequate insurance coverage or other cost reasons; (3) 
designing and administering transition programs for manufacturers, which 
includes obtaining third-party payment for a product for patients who had 
previously received it free as part of a clinical trial; and (4) conducting 
reimbursement training seminars for clients and their customers. 

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   All of these services are supported by a dedicated information services 
group that provides a range of data products, services and information 
systems, including customized hospital cost reports, patient average lengths 
of stay or mortality rates at the federal, state, local or individual 
hospital level. The extensive economic and epidemiologic databases Covance 
maintains are used to perform market research, determine the economics of a 
disease or inform government authorities about the need for potential policy 
changes. 

   Disease Management Services. Working for a variety of customers, including 
pharmaceutical and device manufacturers, managed care organizations, 
hospitals, provider networks and computerized medical record companies, 
Covance designs and implements systems that track patterns of care, patient 
outcomes, and costs, and develops programs and tools designed to improve 
quality and decrease costs of care. Such programs and tools include medical 
practice guidelines and computerized decision support tools. For example, 
Covance is developing nationwide standards for the optimal treatment of 
dialysis patients. This work is being performed in conjunction with a major 
national professional society and is being funded by a manufacturer. In 
another initiative, Covance has started a national database to track practice 
patterns and outcomes concerning eye care provided by ophthalmologists. 
Covance is analyzing the national data and providing reports to individual 
ophthalmologists regarding their performance. 

Clients and Marketing 

   Covance provides its product development services on a global basis to, 
among others, the pharmaceutical and biotechnology industries. Specifically, 
Covance serves over 270 biopharmaceutical companies, including all 50 of the 
world's largest pharmaceutical companies and 17 of the world's 25 largest 
biotechnology companies. Of the 270 biopharmaceutical companies Covance 
serves, 45 are Japanese. The Japanese biopharmaceutical companies are served 
by Covance's U. S. and European operations. For the years ended December 31, 
1995, 1994 and 1993, approximately 70%, 76% and 78%, respectively, of 
Covance's net revenues were attributed principally to U.S. operations, while 
approximately 30%, 24% and 22%, respectively, was attributed to European 
operations. Approximately 59%, 52% and 48% of Covance's net revenue during 
1995, 1994 and 1993, respectively, was attributed to Covance's clinical lines 
of business. Approximately 41%, 48% and 52% of Covance's net revenues during 
1995, 1994 and 1993, respectively, were attributed to Covance's nonclinical 
lines of business. No client accounted for 10% or more of Covance's net 
revenues in 1995, 1994, or 1993. None of Covance's clients accounted for 
greater than 5% of Covance's net revenue in the year ended December 31, 1993. 
In the years ended December 31, 1994 and 1995, one client accounted for 
greater than 5% of Covance's net revenues. In fiscal 1993, 1994 and 1995 and 
the nine months ended September 30, 1996, Covance's top five clients 
accounted for approximately 17%, 20%, 21% and 21%, respectively, of Covance's 
net revenues. See "Risk Factors--Risks Relating to Covance-- Dependence on 
Certain Industries and Clients." 

   Covance's sales activities are conducted by more than 90 business 
development people based in Covance's operations in the United States, 
Europe, Australia, Japan and Singapore. Most of Covance business development 
personnel have technical or scientific backgrounds. 

   To strengthen its sales and marketing activities, Covance introduced in 
1995 a Lotus Notes based large account management process ("LAMP") that 
allows Covance business development personnel in all locations to promptly 
ascertain the status of any new client activity with any Covance operation 
and is an important tool in managing Covance's key account program. Through 
LAMP, the key account program and dedicated resources, Covance believes it 
can better coordinate and unite the efforts of its sales and marketing 
personnel and strengthen relationships with pivotal biopharmaceutical 
clients. Covance believes that this will allow it to improve its 
understanding of its clients' organizational structure, management practices 
and product pipeline, and, thus, better serve its clients' needs. Conversely, 
LAMP also enables clients, across different business functions, to better 
understand the full range of Covance's services. 

Contractual Arrangements 

   Most of Covance's contracts in the preclinical, central laboratory, 
clinical packaging and health economics areas are fixed price or 
fee-for-service and in the clinical and periapproval areas are 
fee-for-service with a cap. To a lesser extent, some of the contracts in the 
clinical and periapproval areas are fixed price or fee-for-service without a 
cap. In cases where the contracts are fixed price, Covance bears the cost of 
overruns, with certain exceptions, but benefits if the costs are lower than 
anticipated. In cases where the contracts are fee-for-service with a cap, the 

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contracts contain an overall budget for the trial based on time and cost 
estimates. If costs are lower than anticipated, the client keeps the savings, 
but if costs are higher than estimated, then Covance is responsible for the 
overrun unless the increased cost is a result of a change requested by the 
client, such as an increase in the number of patients to be enrolled or the 
type or amount of data to be collected. Contracts may range from a few months 
to several years depending on the nature of the work performed. In some 
cases, for multiyear contracts involving either preclinical or clinical and 
periapproval trials, a portion of the contract fee is paid at the time the 
study or trial is started with the balance of the contract fee payable in 
installments over the study or trial duration and may be performance based. 
For instance, in clinical and periapproval trials, installment payments may 
be related to investigator recruitment, patient enrollment or delivery of the 
database. 

   Most of Covance's contracts for the provision of its services are 
terminable by the client either immediately or upon notice. Contracts may be 
terminated for a variety of reasons, including the failure of a product to 
satisfy safety requirements, unexpected or undesired results of the product, 
the client's decision to forego or terminate a particular study, insufficient 
enrollment or investigator recruitment, or Covance's failure to properly 
discharge its obligations thereunder. Although the contracts often require 
payment of expenses to wind down the study and fees earned to date, and in 
some cases, a termination fee or a payment of a portion of the fees or 
profits that would have been earned under the contract if the contract had 
not been terminated early, the loss of a large contract or the loss of 
multiple contracts could materially and adversely affect Covance. See "Risk 
Factors--Risks Relating to Covance--Fixed Price Nature of Contracts; Loss or 
Delay of Large Contracts." 

Backlog 

   Certain of Covance's studies and projects are performed over an extended 
period of time which may be as long as several years. With respect to such 
studies or projects, Covance maintains an order backlog to track anticipated 
net revenues for such work that has yet to be earned. Covance does not 
maintain an order backlog for all the services it provides because such 
services are performed within a short period of time or for other reasons 
where it is not practical or feasible to maintain an order backlog. 
Additionally, services appropriate for backlog measurement do not correspond 
exactly with any particular line of business. 

   Backlog is principally calculated with respect to work to be performed 
pursuant to letters of intent and contracts. Once work under a letter of 
intent or contract commences, net revenue is recognized over the life of the 
contract. In certain cases, however, Covance will work on a project prior to 
executing a letter of intent and the backlog may include the net revenue 
expected from such project. 

   No assurance can be given that Covance will be able to realize all or any 
net revenue included in backlog. Although backlog can be meaningful to 
management with respect to a particular study where study-specific 
information is known (e.g., study duration, performance clauses and other 
study-specific contract terms), Covance believes that its aggregate backlog 
as of any date is not necessarily a meaningful indicator of future results 
for a variety of reasons, including the following: First, studies vary in 
duration. For instance, some studies that are included in 1995 backlog may be 
completed in 1996, while others may be completed in later years. Second, the 
scope of studies may change, which may either increase or decrease their 
value. Third, studies included in backlog may be subject to bonus or penalty 
payments. Fourth, trials under letters of intent or contracts included in 
backlog are subject to termination or delay at any time by the client or 
regulatory authorities. Termination or delays can result from a number of 
reasons. See "--Contractual Arrangements." Delayed contracts remain in 
Covance's backlog pending determination of whether to continue, modify or 
cancel the study. 

   Using this method of measuring backlog, at December 31, 1995, 1994 and 
1993, Covance's aggregate backlog was approximately $392 million, $344 
million and $294 million, respectively. 

Competition 

   The CRO industry is highly fragmented, with participants ranging from 
hundreds of small, limited-service providers to a few full service CROs with 
global capabilities. Covance primarily competes against in-house departments 
of pharmaceutical companies, full-service CROs and, to a lesser extent, 
universities and teaching hospitals. Covance believes, based on 1995 
revenues, that the five largest CROs after itself include PPD (after its 
merger with APBI), Quintiles Transnational Corporation, Huntington 
International Holdings PLC, Parexel International Corporation and ClinTrials 
Inc. CROs compete on the basis of several factors, including reputation 

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for on-time quality performance, expertise and experience in specific 
therapeutic areas, scope of service offerings, how well such services are 
integrated, strengths in various geographic markets, price, technological 
expertise and efficient drug development processes, the ability to acquire, 
process, analyze and report data in a time-saving and accurate manner, the 
ability to manage large-scale clinical trials both domestically and 
internationally, expertise and experience in health economics and size. While 
Covance has competed effectively in these areas, there can be no assurance 
that Covance will be able to continue to do so. As a result of competitive 
pressures, the CRO industry is consolidating. This trend is likely to produce 
competition among the larger CROs for both clients and acquisition candidates 
and companies may choose to limit the CROs they are willing to work with. In 
addition, there are few barriers to entry for small, limited-service entities 
considering entering the CRO industry. These entities may compete against 
larger CROs for clients. Furthermore, the CRO industry has attracted the 
attention of the investment community, which could lead to increased 
competition by increasing the availability of financial resources for CROs. 
Increased competition may lead to price and other forms of competition that 
could have a material adverse effect on the results of operations of Covance. 
See "--CRO Industry Overview." 

Government Regulation 

   The laboratory and manufacturing services performed by Covance are subject 
to various regulatory requirements designed to ensure the quality and 
integrity of the testing and manufacturing processes. See "--The Drug 
Development Process--Overview." The industry standards for conducting 
preclinical laboratory testing are embodied in the GLP and GMP regulations 
and for central laboratory operations in Clinical Laboratory Improvement 
Amendments of 1988 ("CLIA"). Covance's central laboratories also, in limited 
circumstances and when required by a client, follow GLP. Covance's central 
laboratory in Geneva has also been certified by CAP. GMP sets forth the 
requirements for manufacturing facilities. GLP and GMP have been adopted by 
the FDA, by the Department of Health in the United Kingdom and by similar 
regulatory authorities in other parts of the world. GLP and GMP stipulate 
requirements for facilities, equipment and professional staff. The 
regulations require standardized procedures for studies, for recording and 
reporting data and for retaining appropriate records. To help ensure 
compliance, Covance has established quality assurance controls at its 
laboratory and manufacturing facilities which monitor ongoing compliance with 
GLP, GMP and CLIA regulations, as applicable, by auditing test data and 
conducting regular inspections of testing and manufacturing procedures. 

   The industry standard for the conduct of clinical research and development 
studies is embodied in the regulations for GCP. Although GCP has not been 
formally adopted by the FDA nor, with certain exceptions, by similar 
regulatory authorities in other countries, certain provisions of GCP have 
been included in FDA regulations. As a matter of practice, the FDA and many 
other regulatory authorities require that test results submitted to such 
authorities be based on studies conducted in accordance with GCP. These 
regulations require (1) complying with specific requirements governing the 
selection of qualified investigators; (2) obtaining specific written 
commitments from the investigators; (3) verifying that patient informed 
consent is obtained; (4) monitoring the validity and accuracy of data; (5) 
verifying drug or device accountability; (6) instructing investigators to 
maintain records and reports; and (7) permitting appropriate governmental 
authorities access to data for their review. Covance must also maintain 
reports for each study for specified periods for inspection by the study 
sponsor and the FDA during audits. As with GLP and GMP, noncompliance with 
GCP can result in the disqualification of data collection during the clinical 
trial. 

   Covance's standard operating procedures are written in accordance with 
regulations and guidelines appropriate to the region and the nation where 
they will be used. Within Europe, all work is carried out in accordance with 
the European Community Note for Guidance "Good Clinical Practice for Trials 
on Medicinal Products in the European Community" and the requirements of the 
applicable country. In addition, FDA regulations and guidelines serve as a 
basis for Covance's North American and Asian/Pacific standard operating 
procedures. From an international perspective, when applicable, Covance has 
implemented common standard operating procedures across regions to assure 
consistency whenever it is feasible and appropriate to do so. 

   Covance's animal import and breeding facilities are also subject to a 
variety of federal and state laws and regulations, including The Animal 
Welfare Act and the rules and regulations promulgated thereunder by the 
United States Department of Agriculture ("USDA"). These regulations establish 
the standards for the humane treatment, care and handling of animals by 
dealers and research facilities. Covance's breeding and import animal 
facilities maintain detailed standard operating procedures and the 
documentation necessary to assure compliance with 

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<PAGE> 

applicable regulations for the humane treatment of the animals in its 
custody. Besides being licensed by the USDA as both a dealer and research 
facility, this business is also accredited by the American Association for 
the Accreditation of Laboratory Animal Care and has registered assurance with 
the U.S. National Institutes of Health Office of Protection for Research 
Risks. 

   The use of controlled substances in testing for drugs of abuse is 
regulated by the Drug Enforcement Administration (the "DEA"). All Covance 
laboratories using controlled substances for testing purposes are licensed by 
the DEA. 

   Covance's U.S. laboratories are subject to licensing and regulation under 
federal, state and local laws relating to hazard communication and employee 
right-to-know regulations, the handling and disposal of medical specimens and 
hazardous waste and radioactive materials, as well as to the safety and 
health of laboratory employees. All Covance laboratories are operated in 
material compliance with applicable federal and state laws and regulations 
relating to the storage and disposal of all laboratory specimens including 
the regulations of the Environmental Protection Agency, the Nuclear 
Regulatory Commission, the Department of Transportation, the National Fire 
Protection Agency and the Resource Conservation and Recovery Act. Although 
Covance believes that it is currently in compliance in all material respects 
with such federal, state and local laws, failure to comply could subject 
Covance to denial of the right to conduct business, fines, criminal penalties 
and other enforcement actions. 

   In addition to its comprehensive regulation of safety in the workplace, 
the Occupational Safety and Health Administration has established extensive 
requirements relating to workplace safety for health care employers, whose 
workers may be exposed to blood-borne pathogens such as HIV and the hepatitis 
B virus. These regulations, among other things, require work practice 
controls, protective clothing and equipment, training, medical follow-up, 
vaccinations and other measures designed to minimize exposure to chemicals, 
and transmission of blood-borne and airborne pathogens. Furthermore, relevant 
Covance employees receive initial and periodic training to ensure compliance 
with applicable hazardous materials regulations and health and safety 
guidelines. 

   The regulations of the Department of Transportation, the Public Heath 
Service and the Postal Service apply to the surface and air transportation of 
laboratory specimens. Covance's laboratories also comply with the 
International Air Transport Association regulations, which govern 
international shipments of laboratory specimens. Furthermore, when the 
materials are sent to a foreign country, the transportation of such materials 
becomes subject to the laws, rules and regulations of such foreign country. 

Intellectual Property 

   Covance has developed certain computer software and technically derived 
procedures that provide separate services and are intended to maximize the 
quality and effectiveness of its services. Although Covance's intellectual 
property rights are important to its results of operations, Covance believes 
that such factors as the technical expertise, knowledge, ability and 
experience of Covance's professionals are more important, and that, overall, 
these technological capabilities provide significant benefits to its clients. 

Employees 

   At September 1996 Covance had approximately 5,000 employees, approximately 
30% of whom are employed outside of the United States. Approximately 32 of 
Covance's employees hold M.D. degrees, 134 hold Ph.D. degrees, 8 hold 
Pharm.D. degrees, 25 hold DVM degrees and approximately 128 hold masters or 
other postgraduate degrees. Covance believes that its relations with its 
employees are good. 

   Covance's performance depends on its ability to attract and retain 
qualified professional, scientific and technical staff. The level of 
competition among employers for such skilled personnel is high. Covance 
believes that its employee compensation and benefit plans, including its 
recently adopted employee stock ownership plan, enhance employee morale, 
professional commitment and work productivity and provide an incentive for 
employees to remain with Covance. While Covance has not experienced any 
significant problems in attracting or retaining qualified staff, there can be 
no assurance that Covance will be able to avoid such problems in the future. 

Facilities 

   Covance both owns and leases its facilities. Covance's principal executive 
offices are located in Princeton, New Jersey where it leases approximately 
157,000 square feet of space. The lease expires in 2004. Because its 

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<PAGE> 

existing space is approximately 95% occupied and to accommodate its growth, 
Covance is currently in discussions with the landlord of this facility to 
either lease or purchase additional space in Princeton, New Jersey. No 
assurance can be provided that these discussions will be satisfactorily 
resolved. Covance owns its 397,000 square-foot preclinical laboratory located 
in Madison, Wisconsin and its 205,000 square-foot preclinical laboratory in 
Harrogate, England. Covance leases most of its 201,000 square-foot 
preclinical laboratory in Vienna, Virginia. It also owns several of the 
buildings. The leases expire in 1999 and have a 10-year renewal option. 
Covance also leases its 152,000 square-foot pharmaceutical laboratory in 
Indianapolis, Indiana, which expires in 2000. Covance is investigating 
extensions of both leases and other options with respect to such facilities. 
Covance leases its 51,000 square-foot pharmaceutical laboratory in Geneva, 
Switzerland, which lease expires in 2000. Covance's domestic packaging 
operations are conducted from several leased facilities. The principal 
packaging facility is in Allentown, Pennsylvania. The leases are for 
approximately 100,000 square feet of space and they all expire in 1999. 
Covance is currently reviewing facility needs for its domestic packaging 
operations. Covance's Swiss based packaging operation currently conducts 
business in a 20,000 sq. ft. leased facility, but has plans to construct a 
new, purpose designed 37,000 sq. ft. facility. The new facility is expected 
to be completed in early 1998. In addition, in October 1996, Covance 
purchased an 81,000 sq. ft. former pharmaceutical manufacturing facility in 
Horsham, England. After its renovation is completed by mid-1997, this 
facility will be used to provide clinical packaging, clinical and 
periapproval services and health economics services and also serve as 
Covance's European headquarters. Covance Biotechnology's facility in North 
Carolina is leased. See "Risk Factors--Risks Relating to Covance-- 
Biomanufacturing--New Business Venture." Covance also owns or leases other 
facilities in the United States, England, Ireland, Belgium, France, Germany, 
Switzerland, Sweden, Australia, Singapore and Japan. 

Legal Proceedings 

   Covance is party to lawsuits and administrative proceedings incidental to 
the normal course of its business. Covance does not believe that any 
liabilities related to such lawsuits or proceedings will have a material 
effect on its financial condition or results of operations. 

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<PAGE> 

                            MANAGEMENT OF COVANCE 

Management 

   
   Directors. Certain information with respect to the persons who will serve 
as directors of Covance following the Distributions is set forth below. Prior 
to the closing of the Covance Spin-Off Distribution, certain current 
directors will resign and the prospective directors listed below will be 
elected. As provided in the Covance Certificate, the Covance Board will be 
divided into three classes effective upon the Distributions and one class of 
the Covance Board will be elected for a three-year term at each annual 
meeting of stockholders. Included in the information set forth below are the 
names of the directors of each class. The term for which each director will 
initially be elected has not yet been determined. The Covance Board will be 
comprised of seven directors, one of whom will be an officer of Covance and 
two of whom will be officers of Corning. Covance does not intend to hold an 
annual meeting of stockholders until the Spring of 1998. 
    


<TABLE>
<CAPTION>
 Name                     Age 
- -----------------------   --- 
<S>                       <C> 
Christopher A. Kuebler     43 
Van C. Campbell            58 
William C. Ughetta         63 
J. Randall MacDonald       48 
Nigel Morris               37 
Robert M. Baylis           58 
Irwin Lerner               66 
</TABLE>

   Christopher A. Kuebler has been Covance's President and Chief Executive 
Officer, and an Executive Vice President of CLSI, an affiliate of Covance, 
since November 1994. From March 1993 through November 1994, he was the 
Corporate Vice President, European Operations for Abbott Laboratories Inc. 
("ALI"), a diversified health care company. From January 1991 until March 
1993, Mr. Kuebler was the Vice President, Sales and Marketing for ALI's 
Pharmaceutical Division. Mr. Kuebler has been a member of the Covance Board 
since November 1994. Mr. Kuebler also serves in various executive officer and 
director capacities of Covance's subsidiaries. 

   Van C. Campbell is the Vice Chairman of Corning, which he joined in 1964. 
He was elected assistant treasurer in 1971, treasurer in 1972, a vice 
president in 1973, financial vice president in 1975 and senior vice president 
for finance in 1980. He became general manager of the Consumer Products 
Division in 1981. Mr. Campbell was elected vice chairman and a director in 
1983 and during 1995 was appointed to the additional position of chairman of 
Corning Life Sciences, Inc. Mr. Campbell has been a member of the Covance 
Board since May 1995. He is a director of Armstrong World Industries, Inc. 
and General Signal Corporation. 

   William C. Ughetta is the Senior Vice President and General Counsel of 
Corning. Mr. Ughetta joined Corning in 1968 as assistant secretary and 
assistant counsel. He was elected secretary of the corporation in 1971 and 
vice president in 1972. He was elected a senior vice president in 1983. Mr. 
Ughetta has been a member of the Covance Board since July 1996. He is a 
director of Siecor Corporation and Chemung Canal Trust Company. 

   J. Randall MacDonald has been the Senior Vice President-Human Resources 
and Administration for the GTE Corporation, a telecommunications company, 
since April 1995. Prior to April 1995, Mr. MacDonald held various senior 
positions with GTE, including Vice President-Employee Relations and 
Organizational Development (from 1988) and Vice President of Organizational 
Development (from 1986). Mr. MacDonald joined GTE in 1983 as a Director of 
Employee Relations. 

   Nigel W. Morris has been the President and Chief Operating Officer of 
Capital One Financial Corporation ("Capital One"), a financial services 
company, from July 1994 to the present. Mr. Morris was the Executive Vice 
President, Credit Card Division, of the Signet Banking Corporation 
("Signet"), from May 1993 to November 1994. From October 1988 until April 
1993, Mr. Morris was the Senior Vice President-Policy/Strategy-Credit Card 
Business for Signet. He is also a director of Capital One. 

   Robert M. Baylis was the Vice Chairman of CS First Boston Corporation 
("First Boston"), a financial services company, from March 1992 to March 
1996. Prior to March 1992, Mr. Baylis held a variety of positions with First 
Boston, including Chairman and Chief Executive Officer of CS First Boston 
Pacific, Inc./Hong Kong, Managing Director-Investment Banking Group and 
Managing Director-Equity Security Department. Prior to his retirement, Mr. 
Baylis was with First Boston for over 33 years. He is also a director of the 
following corporations: Host Marriott Corporation, Gryphon Holdings, Inc., 
Home State Holdings, Inc. and New York Life Insurance Company. 

                                     147 
<PAGE> 

   Irwin Lerner was the Chairman of the Board of Directors and Executive 
Committee of Hoffmann-La Roche, Inc. ("Roche"), a pharmaceutical company, 
from January to September 1993. From April 1980 to January 1993, Mr. Lerner 
was the President and Chief Executive Officer of Roche. He is also a director 
of the following corporations: Humana, Inc., Medarex, Inc., Public Service 
Enterprise Group Incorporated and Sequence Therapeutics, Inc. 

   Directors' Compensation. Each director of Covance, other than a director 
who is an employee of Covance, will receive $15,000 annually for service as a 
director and will also be paid $1,000 for each meeting of the Covance Board 
and $500 for each meeting of any committee thereof which he attends. 

   Covance has adopted, effective the Distribution Date, a deferred 
compensation plan for directors pursuant to which each director may elect to 
defer until a date specified by him receipt of all or a portion of his 
compensation. Such plan provides that amounts deferred may be allocated to 
(i) a cash account upon which amounts deferred may earn interest, compounded 
quarterly, at the base rate of Citibank, N.A. in effect on certain specified 
dates, (ii) a market value account, the value of which will be based upon the 
market value of Covance Common Stock from time to time, or (iii) a 
combination of such accounts. As of the Distribution Date, it is anticipated 
that there will be seven non-employee directors eligible to participate in 
the deferred compensation plan. 

   Covance has adopted, effective the Distribution Date, a restricted stock 
plan for non-employee directors, pursuant to which Covance will issue to each 
non-employee director elected 200 shares of Covance Common Stock for each 
year specified in the term of service for which such director was elected, 
subject to forfeiture and restrictions on transfer, and 2,000 shares upon 
such director's election, subject to forfeiture and restrictions on transfer. 

   Committees of the Board of Directors. Prior to the Distributions, the 
Covance Board is expected to establish and designate specific functions and 
areas of oversight to an Audit Committee and a Compensation Committee (the 
"Covance Compensation Committee"). The Audit Committee will examine and 
consider matters relating to the financial affairs of Covance, including 
reviewing Covance's annual financial statements, the scope of the independent 
and internal audits and the independent auditor's letter to management 
concerning the effectiveness of Covance's internal financial and accounting 
controls. The Covance Compensation Committee will make recommendations to the 
Covance Board with respect to programs for human resource development and 
management organization and succession, determine senior executive 
compensation, consider and make recommendations to the Covance Board with 
respect to compensation matters and policies and employee benefit and 
incentive plans, administer such plans, and administer Covance's stock option 
and equity based plans and grant stock options and other rights under such 
plans. 

   Executive Officers of Covance. In addition to Mr. Kuebler, the following 
persons will serve as executive officers of Covance after the Distributions: 

   Richard J. Andrews (49) has been a Corporate Senior Vice President of 
Covance since July of 1996. In addition, Mr. Andrews has served as the 
President of Covance Central Laboratory Services Inc., a wholly owned 
subsidiary of Covance, since June 1994. From January 1993, Mr. Andrews has 
served as the President of Covance Central Laboratory Services S.A., a wholly 
owned subsidiary of Covance Central Laboratory Services Inc. since April 
1994. Covance Central Laboratory Services Inc. and Covance Central Laboratory 
Services S.A. provide Covance's central laboratory services. Prior to January 
1993. Mr. Andrews served in various executive capacities in Europe, including 
Worldwide Business Director, for Dupont International S.A., a multinational 
chemical and pharmaceutical company. Mr. Andrews serves as a director of 
several of Covance's subsidiaries. 

   Michael Giannetto (34) has been Covance's Controller since July 1996 and a 
Vice President since November 1996. From December 1992 to March 1995, Mr. 
Giannetto was the Manager of Financial Reporting and Technical Accounting for 
CLSI, an affiliate of Covance. From March 1995 to July 1996, Mr. Giannetto 
was the Business Controller for Covance. Prior to December 1992, Mr. 
Giannetto was a Senior Audit Manager for Deloitte & Touche. 

   Charles C. Harwood, Jr. (43) has been Covance's Corporate Senior Vice 
President and Chief Financial Officer since July 1996. From November 1994 to 
July 1996, Mr. Harwood was the Vice President and Chief Financial Officer. 
From May 1993 to November 1994, Mr. Harwood was Executive Director, Finance 
of Covance. From January 1993 to May 1993, Mr. Harwood was Chief Financial 
Officer and Vice President of Finance with Integrated Telecom Technologies, 
Inc. Prior to that position, he was the President of Pembroke Development 
Co., Inc., a commercial real estate development company. Mr. Harwood also 
serves as a director of Bio-Imaging, Covance Biotechnology and several of 
Covance's other subsidiaries. 

                                     148 
<PAGE> 

   Jeffrey S. Hurwitz (36) has been Covance's Corporate Senior Vice 
President, General Counsel and Secretary since July 1996. From November 1994 
to July 1996, Mr. Hurwitz was Covance's Vice President, General Counsel and 
Secretary. From October 1993 to November 1994, Mr. Hurwitz was Covance's 
General Counsel and Secretary. From May 1992 to October 1993, Mr. Hurwitz was 
an Assistant Counsel and Assistant Secretary for CLSI, an affiliate of 
Covance. From August 1991 to May 1992, Mr. Hurwitz was an Assistant Counsel 
for Corning. From February 1991 to June 1991, Mr. Hurwitz was an Associate 
with the law firm of Luskin & Stern. Prior to February 1991, Mr. Hurwitz was 
an Associate with the law firm of Shearman & Sterling. Mr. Hurwitz also 
serves as a director of Bio-Imaging, Covance Biotechnology and several of 
Covance's other subsidiaries. 

   Kim D. Lamon, M.D., Ph.D. (44) has been a Corporate Senior Vice President 
of Covance since July of 1996. In addition, Dr. Lamon has been the President 
of Covance Clinical and Periapproval Services Inc. and Covance Periapproval 
Services Inc. since May 1996. Covance Clinical and Periapproval Services 
Inc., Covance Periapproval Services Inc. and their European affiliates 
provide Covance's clinical and periapproval services. From April 1994 until 
May 1996, he was the Executive Vice President, Chief Medical Officer for 
Quest Diagnostics and Senior Vice President, Science and Technology for CLSI, 
affiliates of Covance. From July 1992 until April 1994, Dr. Lamon was Senior 
Vice President, Clinical Research and Development and Executive Medical 
Director for Rhone-Poulenc Rorer ("RPR"), a pharmaceutical company. Prior to 
July 1992, Dr. Lamon was Senior Vice President, Clinical Research and 
Regulatory Affairs at RPR. Dr. Lamon received his M.D. and Ph.D. in 
Pharmacology from Thomas Jefferson University. Since 1989, Dr. Lamon has been 
an Adjunct Assistant Professor of Pharmacology at Thomas Jefferson 
University. Dr. Lamon serves as a director of several of Covance's 
subsidiaries. 

   James D. Utterback (41) has been Covance's Corporate Senior Vice 
President, International New Business Ventures and is also responsible for 
Covance's clinical packaging operations since August 1995. From May 1994 
until August 1995, Mr. Utterback was the Senior Vice President, Human 
Resources and Quality for CLSI. Prior to May 1994, Mr. Utterback served in 
various executive capacities, including Chief Executive Officer in South 
Africa, for RPR, a pharmaceutical company. Mr. Utterback has worked in the 
pharmaceutical industry since 1985, living in Europe, Africa and the United 
States. Mr. Utterback serves as a director of several of Covance's 
subsidiaries. 

   Michael G. Wokasch (45) has been a Corporate Senior Vice President of 
Covance since July of 1996. In addition, Mr. Wokasch has been the President 
of Covance Laboratories Inc., a wholly owned subsidiary of Covance, since 
July 1995. Covance Laboratories Inc. and its affiliates provide Covance's 
preclinical services. From January 1992 until July 1995, Mr. Wokasch served 
as Divisional Vice President of Sales of ALI. From October 1991 to January 
1992, Mr. Wokasch served as Director for New Product/Marketing/Development & 
Scientific Relations at ALI. Prior to October 1991, Mr. Wokasch was a 
Director, New Product Development at ALI. Mr. Wokasch serves as a director of 
several of Covance's subsidiaries. 

Executive Compensation 

   Historical Compensation. The following table sets forth information with 
respect to annual and long-term compensation at rates expected to be paid by 
Covance and its subsidiaries to each of the chief executive officer and the 
four other most highly compensated executive officers (the "named executive 
officers") of Covance for services to be rendered in all capacities in fiscal 
year 1996 and such compensation paid or accrued during the years ended 
December 31, 1995 and December 31, 1994 for services rendered by each of the 
named executive officers. All references in the following tables to stock and 
stock options relate to awards of, and options to purchase, Corning Common 
Stock. 

                                     149 
<PAGE> 

                          SUMMARY COMPENSATION TABLE 

<TABLE>
<CAPTION>
                                                                                        Long-Term Compensation 
                                                                                        ---------------------- 
                                                         Annual Compensation                    Awards 
                                                 -----------------------------------    ---------------------- 
                                                                                       Restricted 
                                                                       Other Annual       Stock     Securities      All Other 
               Name and                           Salary     Bonus     Compensation      Awards     Underlying    Compensation 
          Principal Position              Year     (1)        (2)           (3)            (4)        Options          (5) 
- --------------------------------------   ----    -------    -------    -------------     ---------    ---------   ------------- 
<S>                                       <C>    <C>        <C>           <C>                <C>         <C>         <C>        
Christopher A. Kuebler,                   1996   350,000    192,500       42,447              --          --         72,043 
Chairman, President and                   1995   322,567    303,958       39,927         326,926      81,000         68,680 
Chief Executive Officer                   1994    51,667    101,679           --              --      20,000          2,140 
Richard J. Andrews, Corporate Senior      1996   232,960     93,184           --              --       4,000         15,997 
Vice President; President,                1995   222,833    176,512           --              --          --         17,445 
Covance Central 
  Laboratory Services Inc.                1994   197,635     41,000           --              --      12,000         10,466 
Kim D. Lamon, Corporate Senior            1996   323,800    178,090       31,745              --          --         56,012 
Vice President; President,                1995   309,417    160,265       29,225          89,524      60,000         58,060 
Covance Clinical and                      1994   200,000    175,625           --              --      23.000         18,534 
 Periapproval Services Inc. 
  and Covance Periapproval 
  Services Inc. 
James D. Utterback,                       1996   245,758    135,167       19,244              --          --         43,876 
Corporate Senior Vice President,          1995   237,167    104,826       19,244          70,499      24,000         41,595 
International New Business Ventures       1994   153,333    134,646           --              --      18,000         17,509 
Michael Wokasch,                          1996   208,000     93,600        3,600              --          --         17,730 
Corporate Senior Vice President;          1995   100,000     76,500           --              --      38,000          4,740 
President, Covance 
  Laboratories, Inc. 
</TABLE>

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

(1) Reflects for 1996 current salaries on an annualized basis. 

(2) Reflects for 1996 projected performance-based annual cash compensation 
    awards at target levels. 

(3) Includes dividends on shares of restricted stock granted but not earned 
    within one year from date of grant and tax gross-up payments. 

(4) Messrs. Kuebler, Utterback, Wokasch and Dr. Lamon held an aggregate of 
    44,240, 16,316, 8,000 and 27,941 shares of restricted stock, 
    respectively, having an aggregate value on September 30, 1996 of 
    $1,725,360, $636,324, $312,000 and $1,089,699, respectively. Certain of 
    such shares, net of forfeitures, were subject to performance-based 
    conditions on vesting and are subject to forfeiture upon termination and 
    restrictions on transfer prior to stated dates. Certain other shares 
    ("Career Shares") are subject to restrictions on transfer until the 
    executive officer retires at or after age 60 and are subject to 
    forfeiture prior to age 60 in whole if such officer voluntarily 
    terminates employment with Covance and in part if such officer's 
    employment is terminated by Covance. On or prior to the Distribution Date 
    (a) all restrictions on transfer will be removed from Career Shares which 
    are no longer subject to forfeiture, except such shares held by Mr. 
    Kuebler, and all Career Shares which are subject to forfeiture conditions 
    and transfer restrictions will be forfeited; and (b) performance-based 
    shares which remain subject to forfeiture conditions and transfer 
    restrictions and Career Shares which are no longer subject to forfeiture 
    held by Mr. Kuebler will be forfeited, and in lieu thereof restricted 
    shares of Covance Common Stock will thereafter be granted pursuant to the 
    terms of the Covance Incentive Stock Plan (as defined below), which 
    shares will be subject to forfeiture conditions and transfer restrictions 
    until July 1, 1997. Dividends are paid to such individuals on all shares 
    of restricted Corning Common Stock held by them. 

(5) Includes the following amounts to be contributed by Covance to the 
    Covance Retirement Savings Plan (as defined below) for 1996: $6,531 for 
    Mr. Kuebler, $6,517 for Mr. Andrews, $6,000 for Dr. Lamon, $6,750 for Mr. 
    Utterback and $8,250 for Mr. Wokasch. Also includes a $12,840 automobile 
    allowance to be received by each of Messrs. Kuebler, Utterback and Dr. 
    Lamon and $9,480 to be received by each of Messrs. Andrews and Wokasch. 
    Also includes 20% of interest-free loans made by Covance to the following 
    individuals in the following amounts, together with imputed interest 
    thereon: $200,000 for Mr. Kuebler, $150,000 for Dr. Lamon 

                                     150 
<PAGE> 

    and $100,000 for Mr. Utterback, which loans are to be forgiven over a 
    five-year period provided they continue to be employed by Covance and 
    were made to assist such individuals in relocating to the New Jersey 
    area. 

   Option Grants. The following table sets forth certain information 
regarding options granted in 1995 (except for Mr. Andrews whose options were 
granted on April 25, 1996) to the named executive officers pursuant to 
Corning stock option plans. No other options were granted to the named 
executive officers in 1996. Employees of Covance who hold at the Distribution 
Date Corning stock options, including a portion of those granted on December 
6, 1995, will receive new options of Covance ("New Options") under the 
Covance Stock Option Plan (as defined below) in exchange for the surrender of 
such Corning options. The remainder of the options granted on December 6, 
1995 will be cancelled. It is anticipated that such cancelled options will be 
replaced by New Options to be granted under the Covance Stock Option Plan. 

   The exercise prices and the number of shares of Covance Common Stock 
subject to New Options will be determined as of the time of the Distributions 
so as to preserve the investment basis and intrinsic gain associated with the 
Corning options surrendered as of the date of the Covance Spin-Off 
Distribution. Generally, the expiration dates and the dates on which New 
Options are exercisable will be identical to those under the corresponding 
Corning options at the time of the Distributions. Certain New Options will 
provide that upon exercise of such option through the surrender of previously 
owned shares of Covance Common Stock, the participant will be entitled to 
receive options covering the same number of shares so surrendered, with an 
exercise price equal to the fair market value of the shares at the time of 
the exercise of the New Option. 

                  OPTION/SAR GRANTS IN FISCAL YEAR 1995 (1) 

<TABLE>
<CAPTION>
                                                                                  Potential Realizable Value at 
                                                                                  Assumed Annual Rates of Stock 
                                                                                      Price Appreciation for 
                                                 Individual Grants                       Option Term (3) 
                                       ------------------------------------     ----------------------------------- 
                           Number of     % of Total 
                          Securities      Options 
                          Underlying      Granted 
                            Options     to Employees                            Gain 
                            Granted      in Fiscal     Exercise   Expiration     at        Gain at       Gain at 
          Name                (2)           Year         Price       Date      0% (4)        5%            10% 
- -----------------------    ---------    ------------   -------     ---------   ------     ----------   ------------ 
<S>                        <C>         <C>             <C>        <C>          <C>       <C>           <C>
Christopher A. Kuebler        81,000         2.4%        31.25    12/5/2005       0       1,591,890      4,034,161 
Richard J. Andrews             4,000         0.1%        34.44    4/24/2006       0          86,637        219,554 
Kim D. Lamon                  60,000         1.8%        31.25    12/5/2005       0       1,179,177      2,988,267 
James D. Utterback            24,000         0.7%        31.25    12/5/2005       0         471,671      1,195,307 
Michael Wokasch               30,000         0.9%        31.25    12/5/2005       0         589,589      1,494,134 
                               8,000         0.2%        27.50    10/3/2005       0         138,357        350,623 
All Optionees as a 
  Group (4)                3,389,100       100.0%        31.34         2005       0      66,797,662    169,278,390 
</TABLE>

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

(1) No SARs were granted. 

(2) The stock option agreements with Messrs. Kuebler, Utterback and Wokasch 
    (with respect to the 30,000 share grant) and Dr. Lamon provide that 
    one-half of the options will become exercisable on February 1, 1999 and 
    all options will become exercisable on February 1, 2000. The stock option 
    agreement with Mr. Andrews provides that one-half of the options become 
    exercisable on April 24, 1997 and all of the options will become 
    exercisable on April 24, 1998. The stock option agreement with Mr. 
    Wokasch (with respect to the 8,000 share grant) provides that one-half of 
    the options become exercisable on October 4, 1996 and all of the options 
    will become exercisable on October 4, 1997. All such agreements also 
    provide that an additional option may be granted when the optionee uses 
    shares of Corning Common Stock to pay the purchase price of an option. 
    The additional option will be exercisable for the number of shares 
    tendered in payment of the option price, will be exercisable at the then 
    fair market value of the Corning Common Stock, will become exercisable 
    only after the lapse of twelve months and will expire on the expiration 
    date of the original option. 

(3) The dollar amounts set forth under these columns are the result of 
    calculations at 0% and at the 5% and 10% rates established by the 
    Commission and therefore are not intended to forecast future appreciation 
    of Corning's stock price. 

(4) No gain to the optionees is possible without an appreciation in stock 
    price, an event which will also benefit all stockholders. If the stock 
    price does not appreciate, the optionees will realize no benefit. 

                                     151 
<PAGE> 

   Option Exercises and Fiscal Year-End Values. The following table sets 
forth the number of shares of Corning Common Stock covered by both 
exercisable and unexercisable stock options as of December 31, 1995, for the 
named executive officers. The named executive officers exercised no options 
in 1996. 

                  AGGREGATED OPTION/SAR EXERCISES IN FISCAL 
           YEAR 1995 AND 1995 FISCAL YEAR-END OPTION/SAR VALUES (1) 

<TABLE>
<CAPTION>
                                                            Number of Securities 
                                                           Underlying Unexercised            Value of Unexercised 
                                                                 Options at                  In-the-Money Options 
                                                              Fiscal Year End                 At Fiscal Year End 
                                                        ----------------------------     ------------------------------ 
                               Shares 
                              Acquired       Value 
          Name              on Exercise     Realized    Exercisable    Unexercisable    Exercisable     Unexercisable 
- ------------------------    ------------    --------    -----------    -------------     -----------    --------------- 
<S>                         <C>             <C>         <C>            <C>              <C>             <C>
Christopher A. Kuebler           0             0          10,000          91,000             0                  0 
Richard J. Andrews               0             0           2,000          14,000             0                  0 
Kim D. Lamon                     0             0          10,000          73,000             0             13,812 
James D. Utterback               0             0          10,000          32,000             0              8,500 
Michael Wokasch                  0             0               0          38,000             0             28,501 
</TABLE>

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

(1) There are no SARs outstanding. 

   Corporate Performance Plan Activity. Awards of performance-based shares of 
Corning Common Stock have been granted to Covance's executive officers 
pursuant to a series of performance-based plans (the "Corporate Performance 
Plan"). The Corporate Performance Plan provides the mechanisms to reward 
improvement in corporate performance as measured by net income, earnings per 
share and/or return on equity. Each year minimum, target and maximum goals 
are set and shares awarded (at target levels) which are subject to forfeiture 
in whole or in part if performance goals are not met. The percentage of 
awards that may be earned ranges from 0% to 150% of target. Shares earned 
remain subject to forfeiture and restrictions on transfer for two years 
following the end of the performance period. 

   The following table sets forth the number of performance-based shares 
awarded under the Corporate Performance Plan. The dollar value of shares 
earned for 1995 is reflected in the "Restricted Stock Awards" column of the 
Summary Compensation Table appearing on page 137. 

   In late 1996, the Compensation Committee of the board of directors of 
Corning (the "Corning Board") will assess performance against goals, 
determine the number of shares earned of those granted in December 1995 and 
remove all possibility of forfeiture and restrictions on transfer from such 
shares. 

                  CORPORATE PERFORMANCE PLAN ACTIVITY TABLE 

<TABLE>
<CAPTION>
                                             Number                                Number 
                                               of                      Number        of           Vesting 
                                   Grant     Shares    Performance    of Shares    Shares         Date of 
         Number             Year    Date    Granted       Period      Forfeited    Earned      Earned Shares 
- ------------------------   ----    -----    --------    ----------    ---------   --------     --------------- 
<S>                        <C>     <C>      <C>         <C>           <C>         <C>          <C>
Christopher A. Kuebler      1996   12/95     13,500        1996                                     2/99 
                            1995   12/94     10,000        1995                    10,740           2/98 
                            1994                  0 
Richard J. Andrews          1996                  0 
                            1995                  0 
                            1994                  0 
Kim D. Lamon                1996   12/95     10,000        1996                                     2/99 
                            1995   12/94      6,500        1995         3,559       2,941           2/98 
                            1994                  0 
James D. Utterback          1996   12/95      4,000        1996                                     2/99 
                            1995   12/94      4,000        1995         1,684       2,316           2/98 
                            1994                  0 
Michael Wokasch             1996   12/95      5,000        1996                                     2/99 
                            1995                  0 
</TABLE>

                                     152 
<PAGE> 

   Variable Compensation. Covance has adopted, effective upon the 
Distributions, a variable compensation plan (the "Plan"), an annual incentive 
cash compensation plan for approximately 400 supervisory, management and 
executive employees similar to an annual performance plan currently 
maintained by Covance. The terms of the Plan are as follows. 

   The performance-based annual cash incentive awards payable under the Plan 
will be grounded in financial goals such as net income, operating margin, 
return on equity, or earnings per share, or a combination thereof, and 
quantifiable non-financial goals. Each participant will be assigned a target 
award, as a percentage of base salary in effect at the end of the performance 
year for which the target is set, payable if the target is achieved. Actual 
results will be compared to the scale of targets with each gradation of 
desired result corresponding to a percentage which will be multiplied by the 
employee's assigned target award. If the actual result is below target, 
awards will be less than target, down to a point below which no awards are 
earned. If the desired result is above target, awards will be greater than 
target, up to a stated maximum award. The maximum award assigned to the chief 
executive officer may not exceed 200% of base salary in effect on the date 
the Covance Compensation Committee sets the target for the performance year. 
The Covance Compensation Committee retains the right to reduce any award if 
it believes individual performance does not warrant the award calculated by 
reference to the result. 

   Employee Equity Participation Program. Covance has adopted, effective upon 
the Distributions, the Employee Equity Participation Program (the "Program") 
consisting of two plans: (a) a stock option plan (the "Covance Stock Option 
Plan") and (b) an incentive stock plan (the "Covance Incentive Stock Plan"). 
The Program is designed to provide a flexible mechanism to permit key 
employees of Covance and of any subsidiary to obtain significant equity 
ownership in Covance, thereby increasing their proprietary interest in the 
growth and success of Covance. 

   
   The Program, which will be administered by the Covance Compensation 
Committee, provides for the grant to eligible employees of either 
non-qualified or "incentive stock" options, or both, to purchase shares of 
Covance Common Stock at no less than fair market value on the date of grant. 
The Covance Compensation Committee may also provide that options may not be 
exercised in whole or in part for any period or periods of time; provided, 
however, that no option will be exercisable until at least twelve months from 
the date of grant. All options shall expire not more than ten years from the 
date of grant. Options will not be assignable or transferable except for 
limited circumstances on death. During the lifetime of the employee an option 
may be exercised only by him. The option price is payable upon exercise. The 
optionee may pay the option price in cash or with shares of Covance Common 
Stock owned by him. The optionee will have no rights as a stockholder with 
respect to the shares subject to option until shares are issued upon exercise 
of the option. The Covance Compensation Committee may grant options pursuant 
to which an optionee who uses shares of Covance Common Stock to pay the 
purchase price of an option will receive automatically on the date of 
exercise an additional option to purchase shares of Covance Common Stock. 
Such additional option will cover the number of shares tendered in payment of 
the option price, will be exercisable at the then fair market value of 
Covance Common Stock, will become exercisable only after the lapse of twelve 
months and will expire no later than the expiration date of the original 
option. 
    

   The Program also authorizes the Covance Compensation Committee to award to 
eligible employees shares, or the right to receive shares, of Covance Common 
Stock, the equivalent value in cash or a combination thereof (as determined 
by the Covance Compensation Committee). The Covance Compensation Committee 
shall determine the number of shares which are to be awarded to individual 
employees and the number of rights covering shares to be issued upon 
attainment of predetermined performance objectives for specified periods. The 
shares awarded directly to individual employees may be made subject to 
certain restrictions prohibiting sale or other disposition and may be made 
subject to forfeiture in certain events. Shares may be issued to recognize 
past performance either generally or upon attainment of specific objectives. 
Shares issuable for performance (based upon specific predetermined 
objectives) will be payable only to the extent that the Covance Compensation 
Committee determines that an eligible employee has met such objectives and 
will be valued as of the date of such determination. Upon issuance, such 
shares may (but need not) be made subject to the possibility of forfeiture or 
certain restrictions on transfer. 

   Key executive, managerial and technical employees (including officers and 
employees who are directors) of Covance and of any subsidiary will be 
eligible to participate in the Program and the plans thereunder. The 
selection of employees eligible to participate in any plan under the Program 
is within the discretion of the Covance 

                                     153 
<PAGE> 

Compensation Committee. Approximately 400 employees would have been eligible 
to participate in the plans under the Program had the Program been in effect 
in 1996. 

   Under the Program, the maximum number of shares of Covance Common Stock 
which may be optioned or granted to eligible employees will be 6,000,000. 
Shares from expired or terminated options under the Covance Stock Option Plan 
will be available again for option grant under the Program. Shares which are 
issued but not earned, or which are forfeited under the Covance Incentive 
Stock Plan, will be available again for issuance under the Program. The 
Program provides for appropriate adjustments in the aggregate number of 
shares subject to the Program and in the number of shares and the price per 
share, or either, of outstanding options in the case of changes in the 
capital stock of Covance resulting from any recapitalization, stock or 
unusual cash dividend, stock distribution, stock split or any other increase 
or decrease effected without receipt of consideration by Covance, or a merger 
or consolidation in which Covance is the surviving corporation. 

   The Program has a term of five years and no shares may be optioned or 
awarded and no rights to receive shares may be granted after the expiration 
of the Program. The Covance Board is authorized to terminate or amend the 
Program, except that it may not increase the number of shares available 
thereunder, decrease the price at which options may be granted, change the 
class of employees eligible to participate, or extend the term of the Program 
or options granted thereunder without the approval of the holders of a 
majority of the outstanding shares of Covance Common Stock. 

   Covance believes that the U.S. federal income tax consequences of the 
Program are as follows. An optionee who exercises a non-qualified option 
granted under the Covance Stock Option Plan will recognize compensation 
taxable as ordinary income (subject to withholding) in an amount equal to the 
difference between the option price and the fair market value of the shares 
on the date of exercise and Covance or the subsidiary employing the optionee 
will be entitled to a deduction from income in the same amount. The 
optionee's basis in such shares will be increased by the amount taxable as 
compensation, and his capital gain or loss when he disposes of the shares 
will be calculated using such increased basis. 

   If all applicable requirements of the Code with respect to incentive stock 
options are met, no income to the optionee will be recognized and no 
deduction will be allowable to Covance at the time of the grant or exercise 
of an incentive stock option. The excess of the fair market value of the 
shares at the time of exercise of an incentive stock option over the amount 
paid is an item of tax preference which may be subject to the alternative 
minimum tax. In general, if an incentive stock option is exercised three 
months after termination of employment, the optionee will recognize ordinary 
income in an amount equal to the difference between the option price and the 
fair market value of the shares on the date of exercise and Covance or the 
subsidiary employing the optionee will be entitled to a deduction in the same 
amount. If the shares acquired subject to the option are sold within one year 
of the date of exercise or two years from the date of grant, the optionee 
will recognize ordinary income in an amount equal to the difference between 
the option price and the lesser of the fair market value of the shares on the 
date of exercise or the sale price and Covance or the employing subsidiary 
will be entitled to a deduction from income in the same amount. Any excess of 
the sale price over the fair market value on the date of exercise will be 
taxed as a capital gain. 

   Shares of Covance Common Stock which are not subject to restrictions and 
possibility of forfeiture and which are awarded to an employee under the 
Covance Incentive Stock Plan will be treated as ordinary income, subject to 
withholding, to an employee at the time of the transfer of the shares to him 
and the value of such awards will be deductible by Covance or by the 
subsidiary employing the employee at the same time in the same amount. Shares 
granted subject to restrictions and possibility of forfeiture will not be 
subject to tax nor will such grant result in a tax deduction for Covance at 
the time of award. However, when such shares become free of restrictions and 
possibility of forfeiture, the fair market value of such shares at that time 
(i) will be treated as ordinary income to the employee and (ii) will be 
deductible by Covance or by the subsidiary employing the employee. 

   The tax treatment upon disposition of shares acquired under the Program 
will depend upon how long the shares have been held and on whether or not the 
shares were acquired by exercising an incentive stock option. There are no 
tax consequences to Covance upon a participant's disposition of shares 
acquired under the Program, except that Covance may take a deduction equal to 
the amount the participant must recognize as ordinary income in the case of 
the disposition of shares acquired under incentive stock options before the 
applicable holding period has been satisfied. 

                                     154 
<PAGE> 

   
   Pension Plans. None of the executive officers of Covance is currently an 
active participant in a qualified defined benefit plan of Covance. 
    

   It is anticipated that, prior to the Distribution Date, the Compensation 
Committee of the Corning Board will approve, and Covance will adopt, a 
nonqualified Covance Supplemental Executive Retirement Plan for the benefit 
of certain executive officers of Covance, including the named executive 
officers, after the Distribution Date. Once adopted, it is anticipated that 
such plan will be, in whole or in part, an unfunded, unsecured obligation of 
Covance and administered by the Covance Compensation Committee. 

   Eligible executives may commence receiving full benefits under the plan 
upon attaining age 60, so long as they have completed at least twenty years 
of service with Corning or any subsidiary thereof. Retirement benefits to be 
provided under the plan will be based on 40% of an executive's "Final Average 
Pay," defined to mean the average of an executive's base salary plus bonus, 
taking into account the highest five consecutive years of the executive's 
last ten years of employment with Corning or any subsidiary thereof. Under 
the terms of the plan, executives may, with the approval of the Covance 
Compensation Committee, elect to commence receiving reduced benefits prior to 
age 60, provided that they have completed at least five years of service with 
Corning or any subsidiary thereof and have attained age 55. Benefits 
commencing prior to age 60 will be reduced by 5% of the amount of benefits 
earned for each year prior to age 60. For example, at age 55, an executive 
with at least twenty years of service may be eligible to receive 30% of Final 
Average Pay so long as the executive receives approval from the Covance 
Compensation Committee. 

   At retirement, the normal form of payment under the plan will be monthly 
payments over the lifetime of the executive (or actuarially reduced joint and 
survivor benefits over the joint lives of the executive and a named 
beneficiary). Alternatively, the executive may elect under the plan, subject 
to the approval of the Covance Compensation Committee, the right to receive 
an actuarially determined lump-sum distribution from the plan. 

   Maximum annual benefits, based on at least twenty years of service and the 
Final Average Pay calculated under the straight life annuity option form of 
pension, payable to participants at ages 55 to 60 are illustrated in the 
table set forth below. The table below does not reflect any limitations on 
benefits imposed by ERISA. 

<TABLE>
<CAPTION>
                                Age (With at least 20 Years of Service) 
                     -------------------------------------------------------------- 
  Final Average 
Pay                    55        56         57         58         59         60 
 ----------------   -------    -------   -------    -------    -------    --------- 
<S>                 <C>        <C>       <C>        <C>        <C>        <C>
$ 100,000            30,000     32,000     34,000    36,000     38,000      40,000 
  200,000            60,000     64,000     68,000    72,000     76,000      80,000 
  300,000            90,000     96,000    102,000   108,000    114,000     120,000 
  400,000           120,000    128,000    136,000   144,000    152,000     160,000 
  500,000           150,000    160,000    170,000   180,000    190,000     200,000 
  600,000           180,000    192,000    204,000   216,000    228,000     240,000 
  700,000           210,000    224,000    238,000   252,000    266,000     280,000 
  800,000           240,000    256,000    272,000   288,000    304,000     320,000 
  900,000           270,000    288,000    306,000   324,000    342,000     360,000 
1,000,000           300,000    320,000    340,000   360,000    380,000     400,000 
1,100,000           330,000    352,000    374,000   396,000    418,000     440,000 
1,200,000           360,000    384,000    408,000   432,000    456,000     480,000 
</TABLE>

   Covance Retirement Savings Plan. Most of the employees of Covance and its 
subsidiaries have been eligible to participate in a tax-qualified, defined 
contribution plan known as the Covance Retirement Savings Plan (the "Covance 
Retirement Savings Plan" to be renamed the "Covance Stock Purchase Savings 
Plan" prior to the Distribution Date), which provides for investment of 
employee contributions, including tax-deferred contributions under Section 
401(k) of the Code, and matching contributions made by their employers, in 
several investment funds, including Corning Common Stock, at the employees' 
discretion. Effective as of the Distribution Date, Covance Common Stock will 
be added as an investment fund and all or a portion of the employer matching 
contributions will automatically be invested in Covance Common Stock. Corning 
Common Stock will no longer be available as an investment fund except with 
respect to amounts already so invested under the Covance Retirement Savings 
Plan. 

   Effective as of the Distribution Date, the Covance Retirement Savings Plan 
will be amended to permit participating employees' employers to make 
discretionary contributions, other than matching contributions, to the 
Covance Retirement Savings Plan for the benefit of such employees, which 
contributions may be invested in Covance Common Stock. 

                                     155 
<PAGE> 

   Covance Employee Stock Ownership Plan. Covance has adopted, effective upon 
the Distributions, an employee stock ownership plan, as defined in Section 
4975(e)(7) of the Code and related regulations and intended to qualify as a 
retirement plan under Section 401(a) of the Code, to be known as the Covance 
Employee Stock Ownership Plan (the "Covance ESOP"). 

   Individuals who are active employees of Covance and its U.S. subsidiaries 
as of the Distribution Date will become participants in the Covance ESOP. To 
the extent permitted under the Covance ESOP, Covance will contribute as of 
the Distribution Date an amount equal to a portion of each participating 
employee's annual compensation. Covance may in its discretion from time to 
time make additional contributions to the Covance ESOP for the benefit of 
participating employees. The assets of the Covance ESOP will be invested 
primarily in shares of Covance Common Stock. 

   Amounts contributed to the Covance ESOP for the benefit of participating 
employees will be 100% vested on the earlier of death, disability or the 
second anniversary of the effective date of the grant. Contributions to the 
Covance ESOP will not currently be taxable income to the participating 
employees and will not generally be available to them until termination of 
employment. 

   Covance Restricted Share Plan. Covance has adopted, effective upon the 
Distributions, the Covance Restricted Share Plan, intended to provide to 
Covance's foreign national employees in its non-U.S. locations who otherwise 
are ineligible to participate in the Covance ESOP and to domestic employees 
whose participation therein is subject to limitations imposed by ERISA 
benefits similar to the Covance ESOP. To the extent permitted under the plan, 
Covance will award to participating employees shares of Covance Common Stock 
as of the Distribution Date, the market value of which shall equal a portion 
of such employee's annual compensation. Covance may in its discretion from 
time to time make additional awards to participating employees. Shares of 
Covance Common Stock awarded to participating employees will be 100% vested 
on the earlier of death, disability or the second anniversary of the date of 
each grant. 

   Covance Stock Purchase Plan. Covance has adopted, effective upon the 
Distributions, the Covance Stock Purchase Plan (the "Covance Stock Purchase 
Plan") pursuant to which Covance may make available for sale to employees 
shares of its Common Stock at a price equal to 85% of the market value on the 
first or last day of each calendar quarter, whichever is lower. 

   The Covance Stock Purchase Plan, which will be administered by the Covance 
Compensation Committee, is designed to give eligible employees (generally, 
employees of Covance and its U.S. subsidiaries) the opportunity to purchase 
shares of Covance Common Stock through payroll deductions up to 10% of 
compensation in a series of quarterly offerings commencing January 1, 1997, 
and ending no later than December 31, 2006. 

   Any eligible employee may elect to participate in the Covance Stock 
Purchase Plan on a quarterly basis and may terminate his payroll deduction at 
any time or increase or reduce prospectively the amount of his deduction at 
the beginning of any calendar quarter. At the end of each calendar quarter, a 
participating employee will purchase shares of Covance Common Stock with the 
funds deducted. The number of shares purchased will be a number determined by 
dividing the amount withheld by the lower of 85% of the closing price of a 
share of Covance Common Stock as reported in The Wall Street Journal on the 
first or last business day of the particular calendar quarter. An employee 
will have no interest in any shares of Covance Common Stock until such shares 
are actually purchased by him. 

   
   Under the Covance Stock Purchase Plan, the maximum number of shares of 
Covance Common Stock which may be purchased by eligible employees will be 
1,000,000, subject to adjustment in the case of changes in the capital stock 
of Covance resulting from any recapitalization, stock dividend, stock split 
or any other increase or decrease effected without receipt of consideration 
by Covance. 
    

   
   The Covance Stock Purchase Plan has a term of ten years and no shares of 
Covance Common Stock may be offered for sale or sold under the Covance Stock 
Purchase Plan after the tenth anniversary of the effective date. The Covance 
Board is authorized to terminate or amend the Covance Stock Purchase Plan, 
except that it may not increase the number of shares of Covance Common Stock 
available thereunder, decrease the price at which such shares may be offered 
for sale or change the designation of subsidiaries eligible to participate in 
the plan without the approval of the holders of a majority of the shares of 
the capital stock of Covance cast at a meeting at which such matter is 
considered. 
    


                                     156 
<PAGE> 

   Employment Agreements; Severance and Change in Control Arrangements. It is 
anticipated that Mr. Kuebler will enter into an employment agreement with 
Covance. The agreement will expire on or before the third anniversary of the 
Distribution Date. The agreement will include provisions for an annual salary 
of no less than $450,000, with increases subject to the discretion of the 
Covance Board; annual target participation in the Variable Compensation Plan 
of Covance in amounts no less than 65% of annual salary in effect at the time 
performance goals are established; and severance payments following a 
termination or a change in control in accordance with the severance policy 
described below, except that Mr. Kuebler will receive three times his base 
annual salary and three times his annual award of variable compensation in 
the event of termination for reasons other than cause. 

   
   On or before the Distribution Date, Covance will adopt a severance policy 
pursuant to which it will provide to each executive officer, including the 
named executive officers, compensation equal to two times the executive 
officer's base annual salary at the annual rate in effect on the date of 
termination and two times the annual award of variable compensation at the 
most recent target level in the event that such executive officer has been 
terminated for reasons other than cause. Such executive officer will also be 
entitled to participate in Covance's health and benefits plans (to the extent 
permitted by the administrative provisions of such plans and applicable 
federal and state law) for a period of up to two years or until such officer 
is covered by a successor employer's benefit plans, whichever first occurs. 
Pursuant to such policy, Covance will also provide to each executive officer 
upon the termination of employment by Covance other than for cause during the 
twelve months following a change in control of Covance compensation equal to 
three times base annual salary in effect on the termination date and three 
times the annual variable compensation at the most recent target level and 
such officer will be entitled to participate in Covance's health and benefits 
plans for a period of up to three years. A "change in control" is defined in 
the policy to include the following: the acquisition by a person of 20% or 
more of the voting stock of Covance; as a result of a contested election a 
majority of the Covance Board members are different than the individuals who 
served on Covance's Board in the two years prior to such contested election; 
or approval by Covance's shareholders of a merger or consolidation in which 
Covance is not the survivor thereof, or a sale or disposition of all or 
substantially all of Covance's assets or a plan of partial or complete 
liquidation. 
    


                                     157 
<PAGE> 

                        SECURITY OWNERSHIP BY CERTAIN 
                 BENEFICIAL OWNERS AND MANAGEMENT OF COVANCE 

   
   All of the outstanding shares of Covance Common Stock are currently held 
by Quest Diagnostics. The following table sets forth the number of shares of 
Covance Common Stock that are projected to be beneficially owned after the 
Covance Spin-Off Distribution by the directors, by the named executive 
officers and by all directors and executive officers of Covance as a group. 
The projections are based on the number of shares of Corning Common Stock 
held by such persons and such group as of September 30, 1996 (excluding 
Career Shares that will be forfeited prior to the Distribution Date, Career 
Shares that will not receive the Distributions and Corning Common Stock held 
in the Covance Retirement Savings Plan and the Corning Investment Plans) and 
on the number of options to acquire Corning Common Stock held as of such date 
and exercisable within 60 days thereof. With respect to the shares of Covance 
Common Stock, the number reflects the distribution ratio of one share of 
Covance Common Stock for every four shares of Corning Common Stock and with 
respect to options the number reflects the actual number of shares of Corning 
Common Stock subject to options. The stock options held by the directors and 
executive officers of Covance will not affect the security ownership of 
Covance unless (i) such options are exercised prior to the Record Date and 
the underlying shares of Corning Common Stock are held on the Record Date or 
(ii) such options are converted into options to purchase shares of Covance 
Common Stock. 
    


<TABLE>
<CAPTION>
                                Number of Shares 
                               Beneficially Owned          Number of 
Name                                   (1)            Exercisable Options 
- ---------------------------    -------------------    ------------------- 
<S>                            <C>                    <C>
Richard J. Andrews                     474                    4,000 
Robert M. Baylis                     2,000 (2)                    0 
Van C. Campbell                     27,700 (2)              127,457 
Christopher A. Kuebler              11,398                   20,000 
Kim D. Lamon                         7,406                   10,000 
Irwin Lerner                         2,000 (2)                    0 
J. Randall MacDonald                 2,000 (2)                    0 
Nigel Morris                         2,000 (2)                    0 
William C. Ughetta                  24,065 (2)               42,000 
James D. Utterback                   4,226                   10,000 
Michael Wokasch                      2,087                    4,000 

All Directors and Executive 
 Officers as a Group                85,981                  220,957 
</TABLE>

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

   
(1) Does not include 53 shares owned by the spouses and minor children of 
    certain executive officers and directors as to which such officers and 
    directors disclaim beneficial ownership. 
(2) Includes 2,000 shares of Covance Common Stock which each non-employee 
    director will receive in connection with their election but does not 
    include 200 shares of Covance Common Stock for each year specified in the 
    term of service as a director. See "Management of 
    Covance--Management--Directors' Compensation." 
    


                                     158 
<PAGE> 

                     DESCRIPTION OF COVANCE CAPITAL STOCK 

General 

   The following is a brief summary of certain provisions of the Covance 
Certificate, as the restated certificate of incorporation will be amended 
immediately prior to the Covance Spin-Off Distribution, and does not relate 
to or give effect to provisions of statutory or other law except as 
specifically stated. The Covance Certificate authorizes the issuance of 
140,000,000 shares of Covance Common Stock. Approximately 56,903,469 shares 
of Covance Common Stock are expected to be outstanding immediately following 
the Covance Spin-Off Distribution. The rights of holders of shares of Covance 
Common Stock are governed by the Covance Certificate, the Covance By-Laws and 
by the DGCL. 

Voting Rights 

   Subject to the voting of any shares of Covance Series Preferred Stock (as 
defined below) that may be outstanding, voting power is vested in the Covance 
Common Stock, each share having one vote. 

Preemptive Rights 

   The Covance Certificate provides that no holder of shares of Covance 
Common Stock or Covance Series Preferred Stock shall have any preemptive 
rights except as the Covance Board may determine from time to time. No such 
rights have been granted by the Covance Board. 

Covance Common Stock 

   Liquidation Rights. Subject to the preferential rights of any outstanding 
Covance Series Preferred Stock, in the event of any liquidation of Covance, 
holders of shares of Covance Common Stock then outstanding are entitled to 
share ratably in the assets of Covance available for distribution to such 
holders. 

   
   Dividend Policy. Subject to any preferential rights of any outstanding 
preferred securities of Covance, such dividends as may be determined by the 
Covance Board may be declared and paid on the shares of Covance Common Stock 
from time to time out of any funds legally available therefor. Covance has no 
present intention to declare dividends for the foreseeable future. It is 
currently contemplated that, following the Distributions, Covance will not 
pay cash dividends in the foreseeable future, but will retain earnings to 
provide funds for the operation and expansion of its business. Dividend 
decisions will be based upon a number of factors, including the operating 
results and financial requirements of Covance and such other considerations 
as the Covance Board deems relevant. In addition, the Covance Credit Facility 
prohibits Covance from paying cash dividends on the Covance Common Stock 
during a Default or an Event of Default or if after giving effect to the 
payment of such dividends Covance would not be in compliance with the 
financial covenants contained therein. See "Risk Factors--Risks Relating to 
Covance--Absence of Dividends" and "Description of Certain Indebtedness of 
Covance." 

   Other Provisions. The shares of Covance Common Stock have no redemption, 
sinking fund or conversion privileges applicable thereto and holders of 
shares of Covance Common Stock are not liable to assessments or to further 
call. 

   Listing and Trading. Prior to the Distributions, there has been no public 
trading market for the Covance Common Stock although a "when issued" market 
is expected to develop prior to the Distribution Date. Application will be 
made to list the Covance Common Stock on the NYSE, subject to official notice 
of the Distributions, under the trading symbol "CVD". Prices at which Covance 
Common Stock may trade prior to the Distributions on a "when-issued" basis or 
after the Distributions cannot be predicted. Until shares of the Covance 
Common Stock are fully distributed and an orderly market develops, the prices 
at which trading in such stock occurs may fluctuate significantly. The prices 
at which Covance Common Stock will trade will be determined by the 
marketplace and may be influenced by many factors, including, among others, 
the depth and liquidity of the market for Covance Common Stock, investor 
perceptions of Covance, the contract research business, and general economic 
and market conditions. Covance initially will have approximately 18,000 
stockholders of record, based on the expected number of holders of Quest 
Diagnostics Common Stock immediately following the Quest Diagnostics Spin-Off 
Distribution. The Transfer Agent and Registrar for the Covance Common Stock 
will be Harris Trust and Savings 

                                     159 
<PAGE> 
    

Bank. For certain information regarding options to purchase Covance Common 
Stock that may become outstanding after the Distributions, see "Management of 
Covance." 

Covance Series Preferred Stock 

   The Covance Certificate authorizes the issuance of up to 10,000,000 shares 
of Covance Series Preferred Stock, par value $1.00 per share (the "Covance 
Series Preferred Stock"). The Covance Board has the authority to issue such 
shares from time to time, without stockholder approval, and to determine the 
designations, preferences, rights, including voting rights, and restrictions 
of such shares, subject to the DGCL. Pursuant to this authority, the Covance 
Board has designated 1,000,000 shares of Covance Series Preferred Stock as 
Covance Series A Preferred Stock. No other class of Covance Series Preferred 
Stock has been designated by the Covance Board. 

Preferred Share Purchase Rights 

   Attached to each share of Covance Common Stock is one right ("Covance 
Right"), which entitles the registered holder to purchase from Covance one 
one-hundredth of a share of Covance Series A Preferred Stock at a price of 
$100 per one-hundredth of a share of Covance Series A Preferred Stock (the 
"Exercise Price"), subject to adjustment. The Covance Rights expire on 
December 31, 2006 (the "Final Expiration Date"), unless the Final Expiration 
Date is extended or unless the Covance Rights are earlier exercised. 

   The Covance Rights represented by the certificates for shares of Covance 
Common Stock are not exercisable, and are not transferable apart from the 
shares of Covance Common Stock, until the earlier of (1) ten days following 
the public announcement by Covance or an Acquiring Person (as defined below) 
that a person or group has acquired beneficial ownership of 20% or more of 
the shares of Covance Common Stock (an "Acquiring Person") or (2) ten 
business days (or such later date as the Covance Board may determine prior to 
such time as any person or group of affiliated persons becomes an Acquiring 
Person) after the commencement or first public announcement of an intention 
to make a tender or exchange offer that would result in a person or group 
beneficially owning 20% or more of the shares of Covance Common Stock (the 
earlier of such dates being called the "Rights Distribution Date"). The 
Covance Board has the authority to determine that a person that has 
inadvertently acquired beneficial ownership of 20% of the shares of Covance 
Common Stock is not an Acquiring Person if such person promptly reduces its 
ownership interest to below 20%. Separate certificates for the Covance Rights 
will be mailed to holders of record of the shares of Covance Common Stock as 
of such date. The Covance Rights could then begin trading separately from the 
shares of Covance Common Stock. 

   Generally, in the event that a person or group becomes an Acquiring 
Person, each Covance Right (other than the Covance Rights owned by the 
Acquiring Person and certain affiliated persons) will thereafter entitle the 
holder to receive, upon exercise of the Covance Right, shares of Covance 
Common Stock having a value equal to two times the Exercise Price of the 
Covance Right. In the event that a person or group becomes an Acquiring 
Person (but prior to such time as such person or group beneficially owns 50% 
or more of the outstanding shares of Covance Common Stock), the Covance Board 
may exchange each Covance Right and each one one-hundredth of a share of 
Covance Series A Preferred Stock (other than Covance Rights and Covance 
Series A Preferred Stock owned by the Acquiring Person and certain affiliated 
persons) for one share of Covance Common Stock. In the event that Covance is 
acquired in a merger, consolidation, or other business combination 
transaction or more than 50% of Covance's assets, cash flow or earning power 
is sold or transferred, each Covance Right (other than the Covance Rights 
owned by an Acquiring Person and certain affiliated persons) will thereafter 
entitle the holder thereof to receive, upon the exercise of the Covance 
Right, common stock of the acquiring corporation having a value equal to two 
times the Exercise Price of the Covance Right. 

   The Covance Rights are redeemable in whole, but not in part, at $.01 per 
Covance Right at any time prior to any person or group becoming an Acquiring 
Person. The right to exercise the Covance Rights terminates at the time that 
the Covance Board elects to redeem the Covance Rights. Notice of redemption 
shall be given by mailing such notice to the registered holders of the 
Covance Rights. At no time will the Covance Rights have any voting rights. 
The Covance Rights Agent is Harris Trust and Savings Bank (the "Covance 
Rights Agent"). 

   The exercise price payable, and the number of shares of Covance Series A 
Preferred Stock or other securities or property issuable, upon exercise of 
the Covance Rights are subject to adjustment from time to time to prevent 

                                     160 
<PAGE> 

dilution (i) in the event of a stock dividend on, or a subdivision, 
combination or reclassification of, the shares of Covance Series A Preferred 
Stock, (ii) upon the grant to holders of the shares of Covance Series A 
Preferred Stock of certain rights or warrants to subscribe for or purchase 
shares of Covance Series A Preferred Stock at a price, or securities 
convertible into shares of Covance Series A Preferred Stock with a conversion 
price, less than the then current market price of the shares of Covance 
Series A Preferred Stock or (iii) upon the distribution to holders of the 
shares of Covance Series A Preferred Stock of evidences of indebtedness or 
assets (excluding regular periodic cash dividends paid out of earnings or 
retained earnings or dividends payable in shares of Covance Series A 
Preferred Stock) or of subscription rights or warrants (other than those 
referred to above). 

   The number of outstanding Covance Rights and the number of one 
one-hundredths of a share of Covance Series A Preferred Stock issuable upon 
exercise of each Covance Right are also subject to adjustment in the event of 
a stock split of, or stock dividend on, or subdivision, consolidation or 
combination of, the shares of Covance Common Stock prior to the Covance 
Rights Distribution Date. With certain exceptions, no adjustment in the 
exercise price will be required until cumulative adjustments require an 
adjustment of at least 1% in such exercise price. 

   Upon exercise of the Covance Rights, no fractional shares of Covance 
Series A Preferred Stock will be issued (other than fractions which are 
integral multiples of one one-hundredth of a share, which may, at the 
election of Covance, be evidenced by depository receipts) and in lieu thereof 
an adjustment in cash will be made. 

   The Covance Rights have certain antitakeover effects. The Covance Rights 
may cause substantial dilution for a person or group that attempts to acquire 
Covance on terms not approved by the Covance Board, except pursuant to an 
offer conditioned on a substantial number of Covance Rights being acquired. 
The Covance Rights should not interfere with any merger or other business 
combination approved by the Covance Board since the Covance Rights may be 
redeemed by Covance at $.01 per Covance Right prior to the acquisition by a 
person or group of beneficial ownership of 20% or more of the shares of 
Covance Common Stock. 

   The shares of Covance Series A Preferred Stock purchasable upon exercise 
of the Covance Rights will rank junior to all other series of Covance's 
preferred stock or any similar stock that specifically provides that they 
shall rank prior to the shares of Covance Series A Preferred Stock. The 
shares of Covance Series A Preferred Stock will be nonredeemable. Each share 
of Covance Series A Preferred Stock will be entitled to a minimum 
preferential quarterly dividend of $1 per share, but will be entitled to an 
aggregate dividend of 100 times the dividend declared per share of Covance 
Common Stock. In the event of liquidation, the holders of the shares of 
Covance Series A Preferred Stock will be entitled to a minimum preferential 
liquidation payment of $1 per share, but will be entitled to an aggregate 
payment of 100 times the payment made per share on shares of Covance Common 
Stock. Each share of Covance Series A Preferred Stock will have 100 votes, 
voting together with the shares of Covance Common Stock. In the event of any 
merger, consolidation or other transaction in which shares of Covance Common 
Stock are exchanged, each share of Covance Series A Preferred Stock will be 
entitled to receive 100 times the amount and type of consideration received 
per share of Covance Common Stock. These rights are protected by customary 
antidilution provisions. Because of the nature of the Covance Series A 
Preferred Stock's dividend, liquidation and voting rights, the value of the 
interest in a share of Covance Series A Preferred Stock purchasable upon the 
exercise of each Covance Right approximates the value of one share of Covance 
Common Stock. 

   The foregoing description of the Covance Rights does not purport to be 
complete and is qualified in its entirety by reference to the description of 
the Covance Rights contained in the Covance Rights Agreement, dated as of 
December 31, 1996 between Covance and the Covance Rights Agent, which 
agreement has been filed as an exhibit to Covance's registration statement on 
Form 10 (the "Covance Form 10") that Covance has filed with the Commission. 
Prior to the Covance Rights Distribution Date, the Covance Rights Agreement 
may be amended in any respect. After the Covance Rights Distribution Date, 
the Covance Rights Agreement may be amended in any respect that does not 
adversely affect the Covance Rights holders. 

Restrictions on Transfer 

   Shares of the Covance Common Stock distributed to Quest Diagnostics 
stockholders will be freely transferable, except for shares received by any 
persons who may be deemed to be "affiliates" of Covance as that term is 
defined in Rule 144 promulgated under the Securities Act, which shares will 
remain subject to the resale limitations of Rule 144. Persons who may be 
deemed to be affiliates of Covance after the Covance Spin-off Distribution 
generally include individuals or entities that control, are controlled by, or 
are under common control with Covance and may include certain officers and 
directors of Covance as well as principal stockholders of Covance. Persons 
who are affiliates of Covance 

                                     161 
<PAGE> 

will be permitted to sell their shares of Covance only pursuant to an 
effective registration statement under the Securities Act or an exemption 
from the registration requirements of the Securities Act, such as the 
exemption provided by Section 4(1) of the Securities Act or Rule 144 
thereunder. The Section 4(1) exemption allows the sale of unregistered shares 
by a person who is not an issuer, an underwriter or a dealer. Rule 144 
provides persons who are not issuers with objective standards for selling 
restricted securities and securities held by affiliates without registration. 
The rule requires (1) current public information be available concerning the 
issuer; (2) volume limitations be placed on sales during any three-month 
period; and (3) compliance with certain manner of sale restrictions. The 
amount of Covance Common Stock which could be sold under Rule 144 during a 
three-month period cannot exceed the greater of (1) 1% of the outstanding 
shares of Covance Common Stock, or (2) the average weekly trading volume for 
the shares for a four-week period prior to the date that notice of the sale 
is filed with the Commission. 

          ANTITAKEOVER EFFECTS OF CERTAIN PROVISIONS OF THE COVANCE 
                   CERTIFICATE OF INCORPORATION AND BY-LAWS 

General 

   In addition to the Covance Rights, the Covance Certificate and the Covance 
By-Laws contain other provisions that may discourage a third-party from 
seeking to acquire Covance, or to commence a proxy contest or other 
takeover-related action. These provisions, which are in all material respects 
identical to the provisions contained in the certificate of incorporation and 
By-Laws of Corning, are intended to enhance the likelihood of continuity and 
stability in the composition of the Covance Board and in the policies 
formulated by the Covance Board and to discourage certain types of 
transactions that may involve an actual or threatened change of control of 
Covance. These provisions are designed to reduce the vulnerability of Covance 
to an unsolicited acquisition proposal and also to discourage certain tactics 
that may be used in proxy fights. Because such provisions could have the 
effect of discouraging potential acquisition proposals, they may consequently 
inhibit fluctuations in the market price of Covance Common Stock which could 
result from actual or rumored takeover attempts. Such provisions also may 
have the effect of preventing changes in the management of Covance. See "Risk 
Factors--Risks Relating to Covance--Certain Antitakeover Effects." 

Board of Directors 

   The Covance Certificate provides that, effective as of the Covance 
Spin-Off Distribution, the Covance Board is divided into three classes, with 
the classes to be nearly as equal as possible. One class has a term expiring 
at the 1998 annual meeting of stockholders of Covance; the second class has a 
term expiring at the 1999 annual meeting of stockholders of Covance; and the 
third class has a term expiring at the 2000 annual meeting of stockholders of 
Covance. At each annual meeting of stockholders, one class of the Covance 
Board will be elected for a three-year term. The classification of directors 
has the effect of making it more difficult to change the composition of the 
Covance Board. At least two annual meetings of stockholders, instead of one, 
generally will be required to effect a change in the majority of the Covance 
Board. The Covance Board believes that the longer time required to elect a 
majority of a classified board will help ensure the continuity and stability 
of Covance's management and policies, because in most cases a majority of the 
directors at any given time will have had prior experience as directors of 
Covance. 

   Under the DGCL, unless the certificate of incorporation otherwise 
provides, a director on a classified board may only be removed by the 
stockholders for cause. The Covance Certificate provides that a director of 
Covance is only removable by the stockholders for cause. The Covance 
Certificate limits the number of directors to twelve and requires that any 
vacancies on the Covance Board be filled only by a majority of the entire 
Covance Board. The provisions of the DGCL and the Covance Certificate 
relating to the removal of directors and the filling of vacancies on the 
Covance Board preclude a third-party from removing incumbent directors 
without cause and simultaneously gaining control of the Covance Board by 
filling, with its own nominees, the vacancies created by removal. These 
provisions also reduce the power of stockholders generally, even those with a 
majority voting power in Covance, to remove incumbent directors and to fill 
vacancies on the Covance Board without the support of the incumbent 
directors. 

Stockholder Action and Special Meetings 

   The Covance Certificate provides that all stockholder actions to be 
effected by written consent and not a duly called meeting must be effected by 
the unanimous written consent of all stockholders entitled to consent 
thereto. 

                                     162 
<PAGE> 

This provision reduces the power of the Covance stockholders and precludes a 
stockholder of Covance from conducting any form of consent solicitation. The 
Covance Certificate also does not permit stockholders of Covance to call 
special meetings of stockholders. 

Advance Notice Requirements for Stockholder Proposals and Director 
Nominations 

   The Covance By-Laws contain an advance notice procedure with respect to 
the nomination, other than by or at the direction of the Covance Board or a 
committee thereof, of candidates for election as directors as well as for 
other stockholder proposals to be considered at annual meetings of 
stockholders. Delivery of a notice with the required information must be 
delivered to the Secretary of Covance not later than 60 days nor more than 90 
days prior to the date of the stockholders' meeting at which the nomination 
or other proposal is to be considered. No matters can be considered at 
special meetings of the stockholders other than such matters as are set forth 
in the notice of meeting. Although the notice provisions do not give the 
Covance Board any power to approve or disapprove stockholder nominations or 
proposals for action by Covance, they may have the effect of (i) precluding a 
contest for the election of directors or the consideration of stockholder 
proposals if the procedures established by the Covance By-Laws are not 
followed and (ii) discouraging or deterring any third-party from conducting a 
solicitation of proxies to elect its own slate of directors or to approve its 
proposals, without regard to whether consideration of such nominees or 
proposals might be harmful or beneficial to Covance and its stockholders. The 
purpose of requiring advance notice is to afford the Covance Board an 
opportunity to consider the qualifications of the proposed nominees or the 
merits of other stockholder proposals and, to the extent deemed necessary or 
desirable by the Covance Board, to inform stockholders about those matters. 

Business Combinations with Interested Stockholders 

   Paragraph 6 of the Covance Certificate (the "Fair Price Amendment") 
requires the approval by the holders of at least 80% of the voting power of 
the outstanding capital stock of Covance entitled to vote generally in the 
election of directors (the "Covance Voting Stock") as a condition for mergers 
and certain other Business Combinations (as defined below) with any 
beneficial owner of more than 10% of such voting power (an "Interested 
Stockholder") unless (i) the transaction is approved by at least a majority 
of the Continuing Directors (as defined below) or (ii) certain minimum price, 
form of consideration and procedural requirements are met. 

   An Interested Stockholder, in general, is defined as any person or group 
who is, or was at any time within the two-year period immediately prior to 
the date in question, the beneficial owner of more than 10% of the voting 
power of the Covance Voting Stock. The term "beneficial owner" includes 
persons directly or indirectly owning or having the right to acquire or vote 
the shares. In certain circumstances, an Interested Stockholder could include 
persons or entities affiliated or associated with the Interested Stockholder. 

   A Business Combination generally includes the following transactions: (i) 
a merger or consolidation of Covance or any subsidiary with an Interested 
Stockholder; (ii) the sale or other disposition by Covance or a subsidiary of 
assets having an aggregate fair market value of $20,000,000 or more if an 
Interested Stockholder is a party to the transaction; (iii) the issuance or 
transfer of stock or other securities of Covance or of a subsidiary to an 
Interested Stockholder in exchange for cash or property (including stock or 
other securities) having an aggregate fair market value of $20,000,000 or 
more; (iv) the adoption of any plan or proposal for the liquidation or 
dissolution of Covance proposed by or on behalf of an Interested Stockholder; 
(v) any reclassification of securities, recapitalization, merger or 
consolidation with a subsidiary or other transaction which has the effect, 
directly or indirectly, of increasing the percentage of the outstanding stock 
of any class of Covance or a subsidiary owned by an Interested Stockholder; 
or (vi) any agreement, contract or other arrangement providing for any one or 
more of the foregoing actions. 

   A Continuing Director is in general (i) any member of the Covance Board 
who is not an Interested Stockholder or affiliated or associated with an 
Interested Stockholder and was a director of Covance prior to the time the 
Interested Stockholder became an Interested Stockholder and any successor to 
such a Continuing Director who is not affiliated or associated with an 
Interested Stockholder and was recommended or elected by a majority of the 
Continuing Directors then on the Covance Board, or (ii) any person who was a 
director of Covance as of the Distribution Date and any successor thereto who 
was recommended or elected by a majority of the Continuing Directors then on 
the Covance Board. It is possible that the approval of a majority of the 
Continuing Directors could be obtained in circumstances where the Continuing 
Directors constitute less than a quorum of the entire Covance Board. 

                                     163 
<PAGE> 

   The 80% affirmative stockholder vote would not be required if the Business 
Combination in question had been approved by a majority of the Continuing 
Directors or if all the minimum price, form of consideration and procedural 
requirements described below are satisfied. 

   Minimum Price and Form of Consideration Requirements. In a Business 
Combination involving cash or other consideration being paid to Covance's 
stockholders, the consideration required, in the case of each class of 
Covance Voting Stock, would be either cash or the same type of consideration 
used by the Interested Stockholder in acquiring the largest portion of its 
shares of that class of Covance Voting Stock prior to the first public 
announcement of the proposed Business Combination. In addition, such 
consideration would be required to meet the minimum price requirements 
described below. 

   In the case of payments to holders of Covance Common Stock, the fair 
market value per share of such payments would be at least equal in value to 
the higher of (i) the highest per share price paid by the Interested 
Stockholder in acquiring any shares of Covance Common Stock during the two 
years prior to the first public announcement of the proposed Business 
Combination (the "Announcement Date") or in the transaction in which it 
became an Interested Stockholder, whichever is higher, and (ii) the fair 
market value per share of Covance Common Stock on the Announcement Date or on 
the date on which the Interested Stockholder became an Interested 
Stockholder, whichever is higher. 

   In the case of payments to holders of any series of voting Covance Series 
Preferred Stock, if any, the fair market value per share of such payments 
would have to be at least equal to the higher of (i) the price per share 
determined with respect to shares of such series in the same manner as 
described in the preceding paragraph with respect to shares of Covance Common 
Stock and (ii) the highest preferential amount per share to which the holders 
of such series of Covance Series Preferred Stock are entitled in the event of 
a voluntary or involuntary liquidation of Covance. 

   If the transaction does not involve any cash or other property being 
received by any of the other stockholders, such as a sale of assets or an 
issuance of Covance's securities to an Interested Stockholder, then the 
minimum price, form of consideration and procedural requirements would not 
apply, but an 80% vote of stockholders would still be required unless the 
transaction was approved by a majority of the Continuing Directors. 

   Procedural Requirements. An 80% stockholder vote would be required to 
authorize a Business Combination with an Interested Stockholder if Covance, 
after the Interested Stockholder became an Interested Stockholder, had failed 
to pay full quarterly dividends on its Preferred Stock, if any, or reduced 
the rate of dividends paid on its Common Stock, unless such failure or 
reduction was approved by a majority of the Continuing Directors. 

   An 80% stockholder vote to authorize a Business Combination with an 
Interested Stockholder would also be required if the Interested Stockholder 
had acquired any additional shares of the Covance Voting Stock, directly from 
Covance or otherwise, in any transaction subsequent to the transaction 
pursuant to which it became an Interested Stockholder. 

   The receipt by the Interested Stockholder at any time after it became an 
Interested Stockholder, whether in connection with the proposed Business 
Combination or otherwise, of the benefit of any loans or other financial 
assistance or tax advantages provided by Covance (other than proportionately 
as a stockholder) would also trigger the 80% stockholder vote requirement to 
authorize a Business Combination with an Interested Stockholder (unless the 
Business Combination was approved by a majority of the Continuing Directors). 

   In summary, none of the minimum price, form of consideration or procedural 
requirements described above would apply in the case of a Business 
Combination approved by a majority of the Continuing Directors. In the 
absence of such approval, all of such requirements would have to be satisfied 
to avoid the 80% stockholder vote requirements. 

Amendment of the Covance Certificate 

   Amendment or repeal of the provisions of the Covance Certificate described 
above or the adoption of any provision inconsistent therewith would require 
the affirmative vote of at least 80% of the Covance Voting Stock unless the 
proposed amendment or repeal or the adoption of the inconsistent provisions 
are approved by two-thirds of the entire Covance Board and a majority of the 
Continuing Directors. 

                                     164 
<PAGE> 

Antitakeover Statutes 

   Section 203 of the DGCL prohibits transactions between a Delaware 
corporation and an "interested stockholder," which is defined therein as a 
person who, together with any affiliates and/or associates of such person, 
beneficially owns, directly or indirectly, 15% or more of the outstanding 
voting shares of a Delaware corporation. This provision prohibits certain 
business combinations (defined broadly to include mergers, consolidations, 
sales or other dispositions of assets having an aggregate value in excess of 
10% of the consolidated assets of the corporation, and certain transactions 
that would increase the interested stockholder's proportionate share 
ownership in the corporation) between an interested stockholder and a 
corporation for a period of three years after the date the interested 
stockholder acquired its stock unless (i) the business combination is 
approved by the corporation's board of directors prior to the date the 
interested stockholder acquired shares, (ii) the interested stockholder 
acquired at least 85% of the voting stock of the corporation in the 
transaction in which it becomes an interested stockholder, or (iii) the 
business combination is approved by a majority of the board of directors and 
by the affirmative vote of 662/3% of the votes entitled to be cast by 
disinterested stockholders at an annual or special meeting. The Covance 
Certificate and the Covance By-Laws do not exclude Covance from the 
restrictions imposed under Section 203 of the DGCL. 

Tax Sharing and Indemnification Agreements 

   The corporate tax liability which potentially could arise from an 
acquisition of shares of Covance capital stock or assets of Covance for a 
period of time following the Covance Spin-Off Distribution, together with the 
related indemnification arrangements contained in the Tax Sharing and 
Spin-Off Tax Indemnification Agreements, could have an antitakeover effect on 
the acquisition of control of Covance. See "The Relationship Among Corning, 
Quest Diagnostics and Covance After the Distributions--Tax Sharing Agreement" 
and "The Relationship Among Corning, Quest Diagnostics and Covance After the 
Distributions--Spin-Off Tax Indemnification Agreements." 

                                     165 
<PAGE> 

                DESCRIPTION OF CERTAIN INDEBTEDNESS OF COVANCE 

   Covance is currently negotiating with several banks and financial 
institutions (the "Covance Lenders") for a five year $250,000,000 Senior 
Revolving Credit Facility (the "Covance Credit Facility") to be entered into 
prior to the Covance Spin-Off Distribution, with the Covance Lenders, 
NationsBank N.A. ("NationsBank"), as administrative agent, and Wachovia Bank 
of Georgia, N.A., as syndication agent (collectively, the "Agents"). A copy 
of the proposed form of the Covance Credit Facility will be filed as an 
exhibit to the Covance Form 10. This summary of the terms and conditions of 
the Covance Credit Facility does not purport to be complete and is qualified 
in its entirety by reference to such proposed form, including the definitions 
contained therein. 

   The Covance Credit Facility will be guaranteed by certain material U.S. 
subsidiaries (i.e., U.S. subsidiaries whose assets represent individually at 
least 5% of the total assets of Covance and its subsidiaries) and, in certain 
circumstances, other subsidiaries. Additionally, the Covance Credit Facility 
will be secured by 65% of the voting stock of each of the material (and, in 
certain circumstances, other) first-tier foreign subsidiaries, and by 
intercompany notes evidencing loans made by U.S. material subsidiaries to 
U.S. non-material subsidiaries of Covance. The proceeds of the Covance Credit 
Facility will be used to effect the Covance Spin-Off Distribution (including 
(i) the refinancing of certain intercompany indebtedness and taxes owed to 
Corning of approximately $150 million to $160 million and (ii) the payment of 
approximately $5.0 million in transaction costs), and to provide financing 
for Covance's and its subsidiaries' working capital needs (including the 
issuance by NationsBank letters of credit not to exceed $25 million), capital 
expenditures, acquisitions and other lawful corporate purposes. 

   Covance may borrow U.S. Dollars, British Pounds Sterling, German 
Deutschmarks, Swiss Francs or Japanese Yen under the Covance Credit Facility 
until the fifth anniversary thereof, at which time all outstanding loans and 
other amounts must be paid in full. Covance may prepay the loans under the 
Covance Credit Facility in whole or in part (subject to reimbursement of 
breakage costs associated with loans based on the Eurocurrency Rate, as 
defined below) and may permanently reduce or terminate the Covance Lenders' 
commitments. 

Interest 

   Under the Covance Credit Facility, Covance may choose to obtain "Revolving 
Loans," "Competitive Bid Loans" or "Swing Line Loans." A Revolving Loan bears 
interest, at Covance's option, at either (i) the "Base Rate" (defined as the 
higher of (a) the NationsBank prime rate and (b) the federal funds rate plus 
 .50%), payable quarterly, or (ii) the "Eurocurrency Rate" plus the 
"Applicable Percentage", payable at the end of each one, two, three or six 
month interest period selected by Covance (and also quarterly, in the case of 
a six month interest period). The Eurocurrency Rate is the average rate per 
annum appearing on Telerate Page 3750 (or any successor page, or if not 
published on Telerate Page 3750 then the rate or the arithmetic mean of any 
rates per annum specified on Reuters Screen LIBO page) for deposits in U.S. 
Dollars or any other applicable currency two business days prior to the first 
day of any applicable interest period for a term comparable to such interest 
period, as adjusted for reserve requirements. The Applicable Percentage is a 
percentage per annum, which will be .25% until the fifth business day 
following March 31, 1997 and thereafter will be determined quarterly (and 
depending on such determination, may vary between .17% and .45%) based, at 
Covance's option, upon either (i) the lowest debt rating as of each quarterly 
calculation date announced by Standard & Poor's Ratings Group or Moody's 
Investors Service, Inc., as the case may be, for any class of long-term 
senior unsecured debt issued by the Covance or (ii) Covance's Leverage Ratio 
as defined below (as adjusted). A Competitive Bid Loan bears interest, at 
Covance's option, at either (i) a fixed rate offered by a Covance Lender and 
accepted by Covance, payable at the end of the interest period selected by 
Covance, which interest period may not exceed 180 days (and also quarterly, 
in the case of a period longer than three months), or (ii) the Eurocurrency 
Rate plus the margin offered by such Covance Lender and accepted by Covance, 
payable at the end of each one, two, three or six month interest period 
selected by Covance (and also, quarterly in the case of a six month interest 
period). Swing Line Loans (made by NationsBank and limited to $10,000,000) 
may at Covance's option, bear interest at either (i) the Base Rate, payable 
quarterly or (ii) a rate quoted by NationsBank as the "Quoted Rate", payable 
at the end of the interest period selected by Covance (and also quarterly, in 
the case of an interest period greater than three months). 

Fees 

   Covance will pay quarterly as a percentage of the aggregate amount of 
letters of credit issued and outstanding (a) an issuing lender fee of 1/8% 
and (b) a letter of credit fee of .25% until the fifth business day following 
March 

                                     166 
<PAGE> 

31, 1997 and thereafter at a rate equal to the Applicable Percentage, ranging 
between .17% and .45%. Covance will also pay quarterly, based on the 
aggregate amount of commitments under the Covance Credit Facility, a facility 
fee of .125% until the fifth business day following March 31, 1997 and 
thereafter at a rate equal to the Applicable Percentage, ranging between .08% 
and .20%. 

Covenants 

   The Covance Credit Facility will contain covenants which place 
restrictions on Covance and/or the guarantors (subject to certain 
exceptions), including with respect to (i) the incurrence of additional 
indebtedness, (ii) the incurrence of additional liens, (iii) material changes 
in the nature of the business of Covance or the guarantors, (iv) mergers and 
consolidations, (v) entry into certain sale/leaseback transactions, (vi) 
investments and (vii) the payment of dividends. 

   Covance will be required to maintain, for each fiscal quarter, (i) a 
minimum ratio for the 12 month period ending with such fiscal quarter (the 
"Fixed Charge Coverage Ratio") of (A) EBIT plus all rent expense payable 
under operating leases to (B) Interest Expense plus such rent expense, of 2.0 
to 1.0 until December 31, 1997, and 2.25 to 1.0 thereafter and (ii) a maximum 
ratio (the "Leverage Ratio") of Funded Debt, as of the end of such fiscal 
quarter, to EBITDA for the 12 month period ending with such fiscal quarter, 
of 3.30 to 1.0 until March 31, 1997, 3.25 to 1.0 until September 30, 1997, 
3.0 to 1.0 until March 31, 1998 and 2.75 to 1.0 thereafter. EBIT is the sum 
of consolidated net income (net of extraordinary gains and losses, including 
the one-time restructuring charge associated with the Covance Spin-Off 
Distribution), and income tax expense and interest expense. Funded Debt means 
(i) indebtedness with respect to borrowed money, (ii) purchase money 
indebtedness, (iii) capital lease obligations, (iv) letter of credit 
obligations and (v) guarantees. EBITDA is EBIT plus depreciation and 
amortization expense. 

                                     167 
<PAGE> 

                       LIABILITY AND INDEMNIFICATION OF 
                      DIRECTORS AND OFFICERS OF COVANCE 

Limitation on Liability of Directors 

   Pursuant to authority conferred by Section 102 of the DGCL, Paragraph 11 
of the Covance Certificate ("Paragraph 11") eliminates the personal liability 
of Covance's directors to Covance or its stockholders for monetary damages 
for breach of fiduciary duty, including without limitation, directors serving 
on committees of the Covance Board. Directors remain liable for (1) any 
breach of the duty of loyalty to Covance or its stockholders, (2) any act or 
omission not in good faith or which involves intentional misconduct or a 
knowing violation of law, (3) any violation of Section 174 of the DGCL, which 
proscribes the payment of dividends and stock purchases or redemptions under 
certain circumstances, and (4) any transaction from which directors derive an 
improper personal benefit. 

Indemnification and Insurance 

   In accordance with Section 145 of the DGCL, which provides for the 
indemnification of directors, officers and employees under certain 
circumstances, Paragraph 11 grants Covance's directors and officers a right 
to indemnification for all expenses, liabilities and losses relating to 
civil, criminal, administrative or investigative proceedings to which they 
are a party (1) by reason of the fact that they are or were directors and 
officers of Covance or (2) by reason of the fact that, while they are or were 
directors or officers of Covance, they are or were serving at the request of 
Covance as directors or officers of another corporation, partnership, joint 
venture, trust or enterprise. Paragraph 11 further provides for the mandatory 
advancement of expenses incurred by officers and directors in defending such 
proceedings in advance of their final disposition upon delivery to Covance by 
the indemnitee of an undertaking to repay all amounts so advanced if it is 
ultimately determined that such indemnitee is not entitled to be indemnified 
under Paragraph 11. Covance may not indemnify or make advance payments to any 
person in connection with proceedings initiated against Covance by such 
person without the authorization of the Covance Board. 

   In addition, Paragraph 11 provides that directors and officers therein 
described shall be indemnified to the fullest extent permitted by Section 145 
of DGCL, or any successor provisions or amendments thereunder. In the event 
that any such successor provisions or amendments provide indemnification 
rights broader than permitted prior thereto, Paragraph 11 allows such broader 
indemnification rights to apply retroactively with respect to any predating 
alleged action or inaction and also allows the indemnification to continue 
after an indemnitee has ceased to be a director or officer of Covance and to 
inure to the benefit of the indemnitee's heirs, executors and administrators. 

   Paragraph 11 further provides that the right to indemnification is not 
exclusive of any other right which any indemnitee may have or thereafter 
acquire under any statute, the Covance By-Laws, any agreement or vote of 
stockholders or disinterested directors or otherwise, and allows Covance to 
indemnify and advance expenses to any person whom the corporation has the 
power to indemnify under the DGCL or otherwise. 

   Insofar as indemnification for liabilities arising under the Securities 
Act may be permitted for directors and officers and controlling persons 
pursuant to the foregoing provisions, Covance has been advised that in the 
opinion of the Commission such indemnification is against public policy as 
expressed in the Securities Act and is, therefore, unenforceable. 

   The Covance Certificate authorizes Covance to purchase insurance for 
directors, officer, employees and agents of Covance and persons who serve at 
the request of Covance as directors, officers, employees or agents of another 
corporation against any expense, liability or loss incurred in such capacity, 
whether or not Covance would have the power to indemnify such persons against 
such expense or liability under the DGCL. Covance intends to maintain 
insurance coverage of its officers and directors as well as insurance 
coverage to reimburse Covance for potential costs of its corporate 
indemnification of directors and officers. 

                                     168 

<PAGE> 






<PAGE>

                        INDEX TO FINANCIAL STATEMENTS 

<TABLE>
<CAPTION>
                                                                                                           Page 
                                                                                                         --------- 
<S>                                                                                                      <C>
FINANCIAL STATEMENTS OF COVANCE INC. 
Report of Price Waterhouse LLP--Independent Accountants                                                    F-33 
Combined Financial Statements: 
 Combined Balance Sheets--December 31, 1995 and 1994                                                       F-34 
 Combined Statements of Income--Years ended December 31, 1995, 1994 and 1993                               F-35 
 Combined Statements of Cash Flows--Years ended December 31, 1995, 1994 and 1993                           F-36 
 Combined Statements of Stockholder's Equity--Years ended December 31, 1995, 1994 and 1993                 F-37 
 Notes to Combined Financial Statements                                                                    F-38 
Interim Combined Financial Statements (unaudited): 
 Combined Balance Sheets--September 30, 1996 and December 31, 1995                                         F-45 
 Combined Statements of Income--Three and Nine Months ended September 30, 1996 and 1995                    F-46 
 Combined Statements of Cash Flows--Nine Months ended September 30, 1996 and 1995                          F-47 
 Notes to Combined Interim Financial Statements                                                            F-48 
</TABLE>

                                     F-1 
<PAGE>

                      REPORT OF INDEPENDENT ACCOUNTANTS 

   To the Boards of Directors and Stockholders of Corning Incorporated and 
Covance Inc. 

   
   In our opinion, the accompanying combined balance sheets and the related 
combined statements of income, of cash flows and of stockholder's equity 
appearing on pages F-34 through F-44 present fairly, in all material 
respects, the financial position of Covance Inc. and its subsidiaries (an 
indirect wholly-owned business of Corning Incorporated) at December 31, 1995 
and 1994, and the results of their operations and their cash flows for each 
of the three years in the period ended December 31, 1995, in conformity with 
generally accepted accounting principles. These financial statements are the 
responsibility of the Company's management; our responsibility is to express 
an opinion on these financial statements based on our audits. We conducted 
our audits of these statements in accordance with generally accepted auditing 
standards which require that we plan and perform the audit to obtain 
reasonable assurance about whether the financial statements are free of 
material misstatement. An audit includes examining, on a test basis, evidence 
supporting the amounts and disclosures in the financial statements, assessing 
the accounting principles used and significant estimates made by management 
and evaluating the overall financial statement presentation. We believe that 
our audits provide a reasonable basis for the opinion expressed above. 
    

   
/s/ Price Waterhouse LLP 
    

Price Waterhouse LLP 
New York, NY 
July 29, 1996 

The accompanying notes are an integral part of these statements. 

                                     F-33 
<PAGE> 

                        COVANCE INC. AND SUBSIDIARIES 
         (an indirect wholly-owned business of Corning Incorporated) 
                           COMBINED BALANCE SHEETS 
                          DECEMBER 31, 1995 AND 1994 

<TABLE>
<CAPTION>
 (Amounts in thousands)                              1995         1994 
                                                    ---------  ---------- 
<S>                                                <C>         <C>
Assets 
Current Assets: 
  Cash and cash equivalents                        $  8,068     $  6,176 
  Accounts receivable, net                           78,968       66,781 
  Unbilled services                                  18,217       13,194 
  Inventory                                          14,004       10,729 
  Deferred income taxes                              11,337       10,033 
  Prepaid expenses and other assets                  15,189       11,849 
                                                     -------     -------- 
    Total Current Assets                            145,783      118,762 
  Property and equipment, net                       140,708      126,483 
  Goodwill, net                                      24,028       15,880 
  Other assets                                       11,991       10,867 
                                                     -------     -------- 
    Total Assets                                   $322,510     $271,992 
                                                     =======     ======== 
Liabilities and Stockholder's Equity 
Current Liabilities: 
  Trade accounts payable                           $ 23,761     $ 16,690 
  Accrued payroll and benefits                       20,339       15,775 
  Accrued expenses and other liabilities             24,701       16,243 
  Unearned revenue                                   41,879       49,135 
  Income taxes payable                               16,631        7,958 
                                                     -------     -------- 
    Total Current Liabilities                       127,311      105,801 
Due to Corning Incorporated and affiliates           89,836       75,178 
Deferred income taxes                                 6,406        9,605 
Other liabilities                                    16,440       17,500 
                                                     -------     -------- 
    Total Liabilities                               239,993      208,084 
                                                     -------     -------- 
Commitments and Contingent Liabilities 
Stockholder's Equity: 
  Contributed capital                                30,816       26,528 
  Retained earnings                                  48,653       34,656  
  Cumulative translation adjustment                   3,048        2,724 
                                                     -------     -------- 
    Total Stockholder's Equity                       82,517       63,908 
                                                     -------     -------- 
    Total Liabilities and Stockholder's Equity     $322,510     $271,992 
                                                     =======     ======== 
</TABLE>

  The accompanying notes are an integral part of these financial statements. 

                                     F-34 
<PAGE> 

                        COVANCE INC. AND SUBSIDIARIES 
         (an indirect wholly-owned business of Corning Incorporated) 
                        COMBINED STATEMENTS OF INCOME 
             FOR THE YEARS ENDED DECEMBER 31, 1995, 1994 AND 1993 

<TABLE>
<CAPTION>
 (Amounts in thousands)                               1995        1994         1993 
                                                     ---------  ---------   ---------- 
<S>                                                 <C>         <C>         <C>
Net revenues                                        $409,174    $319,501     $289,697 
Cost and expenses 
 Cost of revenue                                     270,726     213,490      192,783 
 Selling, general and administrative expenses         64,201      48,892       42,949 
 Restructuring charge                                  4,616          --           -- 
 Depreciation and amortization                        22,070      18,520       16,984 
                                                      -------     -------    --------- 
   Total                                             361,613     280,902      252,716 
                                                      -------     -------    --------- 
Income from operations                                47,561      38,599       36,981 
                                                      -------     -------    --------- 
Other expense (income) 
 Interest expense, net                                 5,269       4,307        4,421 
 Foreign exchange (gain) loss                           (784)       (712)         852 
                                                      -------     -------    --------- 
                                                       4,485       3,595        5,273 
                                                      -------     -------    --------- 
Income before taxes and equity investee loss          43,076      35,004       31,708 
Taxes on income                                       18,445      14,924       13,506 
Equity investee loss                                     405         435        1,391 
                                                      -------     -------    --------- 
Net income                                          $ 24,226    $ 19,645     $ 16,811 
                                                      =======     =======    ========= 
</TABLE>

  The accompanying notes are an integral part of these financial statements. 

                                     F-35 
<PAGE> 

                        COVANCE INC. AND SUBSIDIARIES 
         (an indirect wholly-owned business of Corning Incorporated) 
                      COMBINED STATEMENTS OF CASH FLOWS 
             FOR THE YEARS ENDED DECEMBER 31, 1995, 1994 AND 1993 

<TABLE>
<CAPTION>
 (Amounts in thousands)                              1995        1994         1993 
                                                    ---------  ---------   ---------- 
<S>                                                <C>         <C>         <C>
Cash flows from operating activities 
Net income                                         $ 24,226    $ 19,645     $ 16,811 
Adjustments to reconcile net income to net 
cash provided by operating activities: 
  Depreciation and amortization                      22,070      18,520       16,984 
  Restructuring reserve, net of cash paid             2,965          --           -- 
  Deferred income tax provision                      (4,503)     (1,502)      (2,879) 
  Related party charges                               3,288       3,504        4,443 
  Other                                               1,266       1,375        2,276 
Changes in operating assets and liabilities 
  Accounts receivable                               (10,082)    (11,706)      (8,814) 
  Unbilled services                                  (5,023)      2,058       (1,973) 
  Inventory                                          (2,576)       (603)         378 
  Accounts payable                                    6,783       4,372         (898) 
  Accrued liabilities                                11,669       7,550        3,058 
  Unearned revenue                                   (7,556)      2,894        1,607 
  Income taxes payable                                8,673         194        4,351 
  Other assets and liabilities, net                  (6,094)     (3,369)       5,156 
                                                     -------     -------     -------- 
Net cash provided by operating activities            45,106      42,932       40,500 
                                                    ---------  ---------   ---------- 
Cash flows from investing activities 
  Capital expenditures                              (34,792)    (25,242)     (24,893) 
  Acquisition of businesses                         (14,000)    (10,789)          -- 
  Other, net                                            571      (2,432)         351 
                                                     -------     -------     -------- 
Net cash used in investing activities               (48,221)    (38,463)     (24,542) 
                                                    ---------  ---------   ---------- 
Cash flows from financing activities 
  Due to Corning Incorporated and affiliates            236      (4,710)      (8,677) 
  Acquisition loan from Corning Incorporated         14,000      10,789           -- 
  Capital contributions                               1,000          --           -- 
  Dividends paid                                    (10,229)     (9,465)      (8,681) 
                                                     -------     -------     -------- 
Net cash provided by (used in) financing 
 activities                                           5,007      (3,386)     (17,358) 
                                                    ---------  ---------   ---------- 
Net change in cash and cash equivalents               1,892       1,083       (1,400) 
Cash and cash equivalents, beginning of year          6,176       5,093        6,493 
                                                    ---------  ---------   ---------- 
Cash and cash equivalents, end of year             $  8,068    $  6,176     $  5,093 
                                                    =========  =========   ========== 
</TABLE>

  The accompanying notes are an integral part of these financial statements. 

                                     F-36 
<PAGE> 

   
                        COVANCE INC. AND SUBSIDIARIES 
         (an indirect wholly-owned business of Corning Incorporated) 
                 COMBINED STATEMENTS OF STOCKHOLDER'S EQUITY 
             FOR THE YEARS ENDED DECEMBER 31, 1995, 1994 AND 1993 
    


<TABLE>
<CAPTION>
                                                                 Cumulative         Total 
                                     Contributed    Retained    Translation     Stockholder's 
(Amounts in thousands)                 Capital      Earnings     Adjustment         Equity 
                                      ------------   ---------  ------------  ---------------- 
<S>                                   <C>           <C>         <C>           <C>
Balance, December 31, 1992             $18,581      $ 16,346       $2,270          $ 37,197 
Net income                                  --        16,811           --            16,811 
Dividends paid                              --        (8,681)          --            (8,681) 
Capital contribution                     4,443            --           --             4,443 
Currency translation adjustment             --            --         (382)             (382) 
                                      -----------     -------    -----------    -------------- 
Balance, December 31, 1993              23,024        24,476        1,888            49,388 
Net income                                  --        19,645           --            19,645 
Dividends paid                              --        (9,465)          --            (9,465) 
Capital contribution                     3,504            --           --             3,504 
Currency translation adjustment             --            --          836               836 
                                      -----------     -------    -----------    -------------- 
Balance, December 31, 1994              26,528        34,656        2,724            63,908 
Net income                                  --        24,226           --            24,226 
Dividends paid                              --       (10,229)          --           (10,229) 
Capital contribution                     4,288            --           --             4,288 
Currency translation adjustment             --            --          324               324 
                                      -----------     -------    -----------    -------------- 
Balance, December 31, 1995             $30,816      $ 48,653       $3,048          $ 82,517 
                                      ===========     =======    ===========    ============== 
</TABLE>

  The accompanying notes are an integral part of these financial statements. 

                                     F-37 
<PAGE> 

                        COVANCE INC. AND SUBSIDIARIES 
         (an indirect wholly-owned business of Corning Incorporated) 
                    NOTES TO COMBINED FINANCIAL STATEMENTS 
              (Dollars in thousands, unless otherwise indicated) 

1. Organization 

   Covance Inc. (formerly Corning Pharmaceutical Services Inc.) and its 
subsidiaries ("Covance") is a leading contract research organization 
providing a wide range of integrated product development services on a 
worldwide basis to the biotechnology, pharmaceutical and medical device 
industries. In addition, and to a lesser extent, Covance provides services 
such as health economics for managed care organizations, hospitals and health 
care provider networks, and early development and laboratory testing services 
to the chemical, agrochemical and food industries. Covance's operations 
involve a single industry segment for financial reporting purposes. At the 
present time, operations are principally focused in the United States and 
Europe. 

   Covance is an indirect wholly-owned business of Corning Incorporated 
("Corning"). In May 1996, Corning's Board of Directors approved a plan to 
distribute to its stockholders on a pro rata basis all of the shares of 
Covance (the "Covance Spin-Off Distribution"). The result of the plan will be 
the creation of an independent, publicly-owned (but as yet unnamed) company. 
Corning has submitted to the Internal Revenue Service a request for a ruling 
that the Covance Spin-Off Distribution will qualify as a tax free 
distribution under the Internal Revenue Code of 1986, as amended. The final 
terms of the Covance Spin-Off Distribution, which are subject to approval by 
Corning's Board of Directors, will be set forth in a registration statement 
to be filed with the Securities and Exchange Commission and in an Information 
Statement to be distributed to Corning's stockholders. The Covance Spin-Off 
Distribution is expected to occur by the end of 1996. 

2. Summary of Significant Accounting Policies 

   Basis of Presentation 

   The operations of Covance Biotechnology Services Inc. (formerly Corning 
Bio Inc.), a majority-owned business of Corning which Corning intends to 
contribute to Covance prior to the Covance Spin-Off Distribution, are 
included in the accompanying financial statements. Accordingly, the 
accompanying financial statements present the results of Covance and Covance 
Biotechnology on a combined basis. 

   Principles of Consolidation 

   The combined financial statements include the accounts of all entities 
controlled by Covance, including Covance Biotechnology. All significant 
intercompany accounts and transactions are eliminated. The equity method of 
accounting is used for investments in affiliates in which Covance owns 
between 20 and 50 percent. 

   Use of Estimates 

   The preparation of financial statements in conformity with generally 
accepted accounting principles requires management to make estimates and 
assumptions that affect the reported amounts of assets and liabilities, 
disclosure of contingent assets and liabilities at the date of the financial 
statements and the reported amounts of revenues and expenses during the 
reporting period. Actual results could differ from these estimates. 

   Foreign Currencies 

   For subsidiaries outside of the United States that operate in a local 
currency environment, assets and liabilities are translated to United States 
dollars at year-end exchange rates. Income and expense items are translated 
at average rates of exchange prevailing during the year. Translation 
adjustments are accumulated in a separate component of stockholder's equity. 
Transaction gains and losses are included in the determination of income. 

   Cash and Cash Equivalents 

   Cash and cash equivalents include all highly liquid investments with an 
original maturity of three months or less at date of purchase and consist 
principally of amounts temporarily invested in money market funds. 

   Financial Instruments 

   The fair value of cash, accounts receivable, trade accounts payable and 
accrued expenses are not materially different than their carrying amounts as 
reported at December 31, 1995 and 1994. 

                                     F-38 
<PAGE> 

                          COVANCE INC. AND SUBSIDIARIES
           (an indirect wholly-owned business of Corning Incorporated)
               NOTES TO COMBINED FINANCIAL STATEMENTS (Continued)
               (Dollars in thousands, unless otherwise indicated)

   Accounts receivable and unbilled services from Covance customers are 
concentrated primarily in the pharmaceutical and biotechnology industries. 
Covance monitors the creditworthiness of its customers to which it grants 
credit terms in the ordinary course of business. Although Covance customers 
are concentrated primarily within these two industries, management considers 
the likelihood of material credit risk exposure as remote. Covance in some 
cases requires advance payment for a portion of the contract price from its 
customers upon the signing of a contract for services. Historically, bad 
debts have been minimal. 

   Inventory 

   Inventories, which consist principally of supplies, are valued at the 
lower of cost (first-in, first-out method) or market. 

   Property and Equipment 

   Property and equipment are recorded at cost. Depreciation and amortization 
are provided on the straight line method at rates adequate to allocate the 
cost of the applicable assets over their estimated useful lives, which range 
in term from three to thirty years. 

   Goodwill 

   Goodwill (investment costs in excess of the fair value of net tangible 
assets acquired) is capitalized and amortized over the period expected to be 
benefited, generally forty years. 

   Impairment of Long-Lived Assets 

   Statement of Financial Accounting Standards No. 121, "Accounting for the 
Impairment of Long-Lived Assets and for Long-Lived Assets to Be Disposed Of" 
("SFAS No. 121"), was adopted in 1995. Assessments of the recoverability of 
long-lived assets are conducted when events or changes in circumstances occur 
that indicate that the carrying value of the asset may not be recoverable. 
The assessment of possible impairment is based upon the ability to recover 
the asset from the expected future undiscounted cash flows of related 
operations. The policy on impairment prior to the adoption of SFAS No. 121 
was not materially different. 

   Revenue Recognition 

   Revenue is recognized using the cost-to-cost type of 
percentage-of-completion method of accounting for services rendered in 
connection with contractual arrangements, which generally range from a few 
months to two years. Revenue is recognized as costs are incurred on the basis 
of the relationship between costs incurred and total estimated costs. Most 
service contracts may be terminated for a variety of reasons by Covance's 
customers either immediately or upon notice. The contracts often require 
payments to Covance to recover costs incurred, including costs to wind down 
the study and fees earned to date, and in some cases to provide Covance with 
a portion of the fees or profits that would have been earned under the 
contract had the contract not been terminated early. Contracts may contain 
provisions for renegotiation in the event of cost overruns due to changes in 
the level of work scope. Renegotiated amounts are included in revenue when 
earned and realization is assured. Provisions for losses to be incurred on 
contracts are recognized in full in the period in which it is determined that 
a loss will result from performance of the contractual arrangement. 

   Revenue from performing clinical laboratory testing services is recognized 
as tests are completed. Revenue from other activities is recognized as 
services are performed or products are shipped. 

   Unbilled receivables are recorded for revenue recognized to date that is 
currently unbillable to the customer pursuant to contractual terms. In 
general, amounts become billable upon the achievement of milestones or in 
accordance with predetermined payment schedules. Unbilled receivables are 
billable to customers within one year from the respective balance sheet date. 
Unearned revenue is recorded for advance billings to customers for which 
revenue has not been recognized at a given date. 

   Covance routinely subcontracts with independent physician investigators in 
connection with multi-site clinical trials. Investigator fees are not 
reflected in revenue or expense since such fees are granted by customers on a 
"pass-thru basis" without risk or reward to Covance. 

                                     F-39 
<PAGE> 

                          COVANCE INC. AND SUBSIDIARIES
           (an indirect wholly-owned business of Corning Incorporated)
               NOTES TO COMBINED FINANCIAL STATEMENTS (Continued)
               (Dollars in thousands, unless otherwise indicated)

   Costs and Expenses 

   Cost of revenue generally includes appropriate amounts necessary to 
complete the revenue earning process which encompass direct labor and related 
benefit charges, other direct costs and allocable expenses (including 
facility charges, indirect labor and information technology costs). Selling, 
general and administrative expenses primarily consist of administrative 
payroll and related benefit charges, advertising and promotional expenses, 
administrative travel and allocable expenses (facility charges and 
information technology costs). Advertising expense is recognized as incurred. 

   Taxes on Income 

   Covance uses the asset and liability method of accounting for income 
taxes. Under this method, deferred tax assets and liabilities are recognized 
for the expected future tax consequences of differences between the carrying 
amounts of assets and liabilities and their respective tax bases using 
enacted tax rates in effect for the year in which the temporary differences 
are expected to reverse. The effect on deferred taxes of a change in enacted 
tax rates is recognized in income in the period when the change is effective. 

3. Property and Equipment 

   Property and equipment at December 31, 1995 and 1994 consist of the 
following: 

<TABLE>
<CAPTION>
                                                         1995          1994 
                                                       ---------   ----------- 
<S>                                                    <C>         <C>
Property and equipment at cost: 
 Land                                                  $   2,996    $   2,746 
 Buildings and improvements                              105,291       94,549 
 Equipment                                               101,686       90,117 
 Furniture, fixtures & leasehold improvements             39,622       36,393 
 Construction-in-progress                                  5,861        6,486 
                                                         -------      --------- 
                                                         255,456      230,291 
Less: Accumulated depreciation and amortization         (114,748)    (103,808) 
                                                         -------      --------- 
Property and equipment                                 $ 140,708    $ 126,483 
                                                         =======      ========= 
</TABLE>

   Depreciation and amortization expense aggregated $20.8 million, $17.8 
million and $16.5 million for 1995, 1994 and 1993, respectively. 

4. Acquisitions and Goodwill 

   In April 1994, Covance acquired SciCor S.A., a provider of laboratory 
testing services domiciled in Switzerland, for total consideration of 
approximately $10.8 million in a transaction accounted for as a purchase 
business combination. The goodwill resulting from this transaction aggregated 
$9.5 million. 

   In January 1995, Covance acquired National Packaging Systems, Inc. ("NPS", 
now known as Covance Pharmaceutical Packaging Services Inc.) for an initial 
cash payment of $14.0 million in a transaction accounted for as a purchase 
business combination. The goodwill resulting from this transaction aggregated 
$9.1 million. In accordance with the terms of the acquisition agreement, 
Covance is contingently obligated to pay up to an additional $7.0 million in 
contingent purchase price to former NPS shareholders if NPS achieves certain 
established earnings targets for the period January 1995 through September 
1996. 

   Results of operations for these entities have been included in the 
accompanying financial statements beginning on the respective dates of 
acquisition. Pro forma information for these entities has not been presented, 
due to their insignificance to Covance taken as a whole. 

   Goodwill associated with these and prior acquisitions aggregated $24.0 
million and $15.9 million, net of accumulated amortization of $3.5 million 
and $2.6 million at December 31, 1995 and 1994, respectively. Amortization 
expense aggregated $0.9 million, $0.5 million and $0.3 million for 1995, 1994 
and 1993, respectively. 

                                     F-40 
<PAGE> 

                          COVANCE INC. AND SUBSIDIARIES
           (an indirect wholly-owned business of Corning Incorporated)
               NOTES TO COMBINED FINANCIAL STATEMENTS (Continued)
               (Dollars in thousands, unless otherwise indicated)

5. Taxes on Income 

   Covance has been included in the Federal income tax return filed by 
Corning. Covance and its subsidiaries have a tax sharing agreement with 
Corning, pursuant to which they are required to compute their provision for 
income taxes on a separate return basis and pay to Corning the separate 
Federal income tax return liability so computed. 

   The components of income before taxes and the related provision (benefit) 
for taxes on income were as follows: 

<TABLE>
<CAPTION>
                                     1995      1994        1993 
                                   --------   --------   --------- 
<S>                                <C>        <C>        <C>
Income before taxes and equity 
  investee losses: 
  Domestic                         $32,771    $30,928    $29,455 
  International                     10,305      4,076      2,253 
                                     ------     ------     ------- 
   Total                           $43,076    $35,004    $31,708 
                                     ======     ======     ======= 
Federal income taxes: 
  Current provision                $19,118    $12,167    $10,932 
  Deferred benefit                  (6,760)    (1,742)    (1,439) 
International income taxes: 
  Current (benefit) provision         (933)       602       (573) 
  Deferred provision                 3,434      1,440      1,612 
State and other income taxes: 
  Current provision                  3,959      2,868      3,143 
  Deferred benefit                    (373)      (411)      (169) 
                                     ------     ------     ------- 
    Total                          $18,445    $14,924    $13,506 
                                    ======     ======     ======= 
</TABLE>
   The differences between the provision for income taxes and income taxes 
computed using the Federal income tax rate were as follows: 
<TABLE>
<CAPTION>
                                          1995     1994      1993 
                                        -------  -------    -------- 
<S>                                     <C>      <C>        <C>
Taxes at statutory rate                   35.0%    35.0%      35.0% 
State and local taxes, net of 
  Federal benefit                          5.5      4.6        6.1 
Impact of international operations        (0.3)     1.7        0.8 
Goodwill amortization                      1.1      0.5        0.4 
Other, net                                 1.5      0.8        0.3 
                                          -----     -----     ------ 
    Total                                 42.8%    42.6%      42.6% 
                                          =====     =====     ====== 
</TABLE>
   The tax effects of temporary differences that give rise to significant 
portions of the deferred tax assets and liabilities at December 31, 1995 and 
1994 are as follows: 
<TABLE>
<CAPTION>
                                             1995          1994 
                                           ----------   ----------- 
<S>                                        <C>          <C>
Current deferred taxes: 
  Liabilities not currently deductible     $ 10,356      $  9,823 
  Net operating losses                          888            -- 
  Other                                         538           210 
                                             --------    ---------- 
                                             11,782        10,033 
 Less: valuation allowance                     (445)           -- 
                                             --------    ---------- 
 Net                                       $ 11,337      $ 10,033 
                                             ========    ========== 
Noncurrent deferred taxes: 
  Property and equipment                   $(12,263)     $(11,894) 
  Liabilities not currently deductible        5,857         2,289 
                                             --------    ---------- 
  Total                                    $ (6,406)     $ (9,605) 
                                             ========    ========== 
</TABLE>

                                     F-41 
<PAGE> 

                          COVANCE INC. AND SUBSIDIARIES
           (an indirect wholly-owned business of Corning Incorporated)
               NOTES TO COMBINED FINANCIAL STATEMENTS (Continued)
               (Dollars in thousands, unless otherwise indicated)

   Income taxes payable at December 31, 1995 and 1994 consists of Federal 
income taxes payable to Corning of $17.0 million and $8.7 million, 
respectively, state and other income taxes payable (receivable) of $1.6 
million and $(0.4) million, respectively, and international income taxes 
receivable of $2.0 million and $0.4 million, respectively. Covance paid 
income taxes of $16.7 million, $17.0 million and $18.3 million for the years 
1995, 1994 and 1993, respectively. 

6. Employee Benefit Plans 

   Covance has several defined contribution plans covering substantially all 
of its full-time employees. Contributions to these plans aggregated $4.9 
million, $4.2 million and $3.7 million for 1995, 1994 and 1993, respectively. 

7. Restructuring Charge 

   In 1995, Covance recorded a provision for restructuring charges totaling 
$4.6 million as a result of management's decision to discontinue certain 
nonstrategic operations. The restructuring charge included severance costs 
related to approximately 90 employees, of which approximately 50 had been 
terminated as of December 31, 1995. The remaining employees were terminated 
and all other substantive activities to complete the restructuring plan were 
completed by April 30, 1996. A summary of the restructuring charge is as 
follows: 

<TABLE>
<CAPTION>
                                                    Charges      Reserve 
                                                    through     balance at 
                                        Original   December      December 
                                        Reserve    31, 1995      31, 1995 
                                      ----------  ----------  ------------- 
<S>                                   <C>         <C>         <C>
Employee termination costs               $1,480     $  539        $  941 
Write-off of fixed assets                 1,737        994           743 
Costs of exiting leased facilities        1,399        118         1,281 
                                        --------    --------    ----------- 
 Total                                   $4,616     $1,651        $2,965 
                                        ========    ========    =========== 
</TABLE>

8. Commitments and Contingent Liabilities 

   Minimum rental commitments under noncancellable operating leases, 
primarily real estate and office facilities, in effect at December 31, 1995 
are as follows: 

<TABLE>
<CAPTION>
<S>                         <C>
 Year ended December 31, 
1996                        $15,332 
1997                        $18,841 
1998                        $16,578 
1999                        $15,493 
2000                        $14,394 
2001 and beyond             $31,253 
</TABLE>

   Operating lease rental expense aggregated $14.1 million, $11.0 million and 
$9.1 million for 1995, 1994 and 1993, respectively. 

   In June 1995, Covance Biotechnology ("lessee") entered into a lease 
arrangement whereby a custom-designed, fully equipped facility would be 
constructed for the lessee at a cost of approximately $55 million to perform 
specialized research and manufacturing activities for biotechnology and 
pharmaceutical companies. The lessor in this arrangement is a subsidiary of 
one of the largest banks in the United States. The lease arrangement contains 
purchase and cancellation options for the lessee at any time during the ten 
year period covered by the lease arrangement. Although the lease arrangement 
is cancelable by the lessee at any time throughout the ten year period, an 
initial lease term of five years, representing management's estimate at the 
lease inception date of the period in 

                                     F-42 
<PAGE> 

                        COVANCE INC. AND SUBSIDIARIES 
         (an indirect wholly-owned business of Corning Incorporated) 
               NOTES TO COMBINED FINANCIAL STATEMENTS (Continued)
              (Dollars in thousands, unless otherwise indicated) 

which occupancy of the facility is reasonably assured, has been selected for 
financial reporting purposes. The initial term of the lease will commence on 
the date of completion of construction of the facility which is currently 
anticipated by the end of 1996. The annual minimum lease payments are 
currently estimated at $5.5 million. The lease arrangement will be classified 
as an operating lease. 

   A purchase price option has been established at specific dates over the 
ten year period covered by the lease arrangement. Using current estimates, 
the purchase price would approximate $54 million at the end of the first year 
and decreases on an amortizing basis to approximately $37 million at the end 
of the tenth year. 

   The cancellation option provisions of the lease arrangement stipulate a 
residual value guarantee by Covance at specific dates over the ten year 
period. Sale of the facility is stipulated in the lease arrangement at such 
time that the lessee exercises the cancellation option provisions. The 
lessee's residual value guarantee ("Deficiency Payment") is unconditionally 
payable to the lessor in the event that the lessee terminates the lease 
arrangement and the sale of the facility results in receipt of sales proceeds 
by the lessor in an amount less than the lessor's unamortized investment in 
the lease arrangement. The lessee's maximum Deficiency Payment would 
approximate $35 million at the end of the first year and decreases to 
approximately $25 million at the end of the tenth year, assuming that the 
sales proceeds received by the lessor were zero. 

9. Geographic Information 

<TABLE>
<CAPTION>
                              United 
                              States        Europe 
                           -------------   ---------- 
<S>                        <C>             <C>
Net revenue: 
 1995                       $286,474       $122,700 
 1994                       $242,131       $ 77,370 
 1993                       $227,110       $ 62,587 
Income from operations: 
 1995                       $ 34,799 (1)   $ 12,762 
 1994                       $ 32,710       $  5,889 
 1993                       $ 32,673       $  4,308 
Identifiable assets: 
 1995                       $229,720       $ 92,790 
 1994                       $202,986       $ 69,006 
 1993                       $183,652       $ 46,041 
</TABLE>

   (1) Excluding the impact of the 1995 restructuring provision totaling 
       $4,616, United States income from operations was $39,415. 

10. Related Party Transactions 

   Covance participates in Corning's centralized treasury and cash management 
processes. For domestic operations, cash received from operations is 
generally transferred to Corning on a daily basis. For international 
operations, excess cash is periodically transferred to Corning. Cash 
disbursements for operations, acquisitions and other investments are funded 
as needed from Corning. Substantially all of Covance's borrowings to date 
have been with Corning. The blended rate on those borrowings for 1995, 1994 
and 1993 was approximately 6.0%. 

   Certain members of Covance management participate in various stock 
compensation programs sponsored by Corning. The expenses associated with 
these programs have been reflected in the accompanying financial statements. 

   Corning and affiliates provide a number of administrative functions to 
Covance which resulted in charges of $5.3 million, $5.7 million and $5.3 
million being recorded in the Covance results of operations for 1995, 1994 
and 1993, respectively. Management believes the method used to allocate such 
costs is reasonable under the circumstances. The charges for these functions 
are included primarily in selling, general and administrative expenses 

                                     F-43 
<PAGE> 

                        COVANCE INC. AND SUBSIDIARIES 
         (an indirect wholly-owned business of Corning Incorporated) 
               NOTES TO COMBINED FINANCIAL STATEMENTS (Continued)
              (Dollars in thousands, unless otherwise indicated) 

and do not necessarily reflect the amount of expenses that would have been 
incurred by Covance on a stand-alone basis. Covance management believes that 
these costs would have been approximately $2.0 million higher on an annual 
basis had Covance operated as a stand alone company during this period. In 
certain cases, related party expenses allocated to Covance have not required 
reimbursement in cash and, accordingly, have been treated as a capital 
contribution. 

11. Subsequent Event 

   In March 1996, Covance acquired all of the assets and substantially all of 
the liabilities of Health Technology Associates, Inc. ("HTA", now known as 
Covance Health Economics and Outcomes Services Inc.) for an initial cash 
payment of approximately $15.0 million in a transaction accounted for as a 
purchase business combination. In accordance with the terms of the asset 
purchase agreement, Covance is contingently obligated to pay up to an 
additional $17.0 million in contingent purchase price if HTA achieves certain 
established earnings targets for the three year period ending March 1999. 

   
   In conjunction with the Covance Spin-Off Distribution, Covance plans to 
record a material nonrecurring charge at the distribution date related to 
establishing and funding an employee stock ownership plan, other employee 
benefit plan arrangements and costs for advisors and other fees associated 
with being established as a separate publicly traded entity. In addition, 
Covance plans to incur significant long term bank borrowings to repay Corning 
for all intercompany borrowings and income tax liabilities at the 
distribution date. The credit facility governing such borrowings prohibits 
Covance from paying cash dividends on the Covance stock. 
    

   Corning, Corning Clinical Laboratories Inc. ("CCL") and Covance will enter 
into tax indemnification agreements that will prohibit CCL and Covance for a 
period of two years after the Distributions from taking certain actions that 
might jeopardize the favorable tax treatment of the Distributions under 
Section 355 of the Internal Revenue Code of 1986, as amended and will provide 
Corning and CCL with certain rights of indemnification against CCL and 
Covance. The tax indemnification agreements will also require CCL and Covance 
to take such actions as Corning may request to preserve the favorable tax 
treatment provided for in any rulings obtained from the Internal Revenue 
Service in respect of the Distributions. 

   Corning, CCL and Covance will also enter into a tax sharing agreement 
which will allocate among Corning, CCL and Covance responsibility for 
federal, state and local taxes relating to taxable periods before and after 
the Spin-Off Distributions and provide for computing and apportioning tax 
liabilities and tax benefits for such periods among the parties. 

12. Quarterly Financial Information (Unaudited) 

   The following is a summary of unaudited quarterly financial information 
for 1995 and 1994: 

<TABLE>
<CAPTION>
                                  First       Second       Third       Fourth 
Year Ended December 31, 1995     Quarter     Quarter      Quarter     Quarter 
- ------------------------------   --------  -----------    ---------   ---------- 
<S>                              <C>       <C>           <C>          <C>
Net revenues                     $91,974     $104,813    $106,099     $106,288 
Income from operations            12,983        9,665(1)   13,671       11,242 
Net income                         6,547        4,449(1)    7,516        5,714 
Year Ended December 31, 1994 
- ------------------------------
Net revenues                     $74,223     $ 77,762    $ 82,904     $ 84,612 
Income from operations             8,187       11,077       9,690        9,645 
Net income                         4,023        5,726       4,967        4,929 
</TABLE>

   (1) Excluding the impact of the 1995 restructuring provision totaling 
       $4,616 ($2,770 net of tax), income from operations and net income in 
       the second quarter of 1995 were $14,281 and $7,219, respectively. 

                                     F-44 
<PAGE> 

                        COVANCE INC. AND SUBSIDIARIES 
         (an indirect wholly-owned business of Corning Incorporated) 
                       INTERIM COMBINED BALANCE SHEETS 
             SEPTEMBER 30, 1996 AND DECEMBER 31, 1995 (UNAUDITED) 

<TABLE>
<CAPTION>
 (Amounts in thousands)                              1996         1995 
                                                    ---------  ---------- 
<S>                                                <C>         <C>
Assets 
Current Assets: 
 Cash and cash equivalents                         $ 13,551     $  8,068 
 Accounts receivable, net                            95,690       78,968 
 Unbilled services                                   43,110       18,217 
 Inventory                                           14,718       14,004 
 Deferred income taxes                               14,273       11,337 
 Prepaid expenses and other assets                   20,639       15,189 
                                                     -------    --------- 
  Total Current Assets                              201,981      145,783 
 Property and Equipment, net                        143,956      140,708 
 Goodwill, net                                       43,443       24,028 
 Other Assets                                        13,212       11,991 
                                                     -------    --------- 
  Total Assets                                     $402,592     $322,510 
                                                     =======    ========= 
Liabilities and Stockholder's Equity 
Current Liabilities: 
 Trade accounts payable                            $ 23,627     $ 23,761 
 Accrued payroll and benefits                        30,058       20,339 
 Accrued expenses and other liabilities              36,410       24,701 
 Unearned revenue                                    46,025       41,879 
 Income taxes payable                                18,408       16,631 
                                                     -------    --------- 
  Total Current Liabilities                         154,528      127,311 
Due to Corning Incorporated and affiliates          118,165       89,836 
Deferred income taxes                                 9,583        6,406 
Other liabilities                                    14,444       16,440 
                                                     -------    --------- 
  Total Liabilities                                 296,720      239,993 
                                                     -------    --------- 
Commitments and Contingent Liabilities 
Stockholder's Equity: 
 Contributed capital                                 32,368       30,816 
 Retained earnings                                   70,505       48,653 
 Cumulative translation adjustment                    2,999        3,048 
                                                     -------    --------- 
  Total Stockholder's Equity                        105,872       82,517 
                                                     -------    --------- 
   Total Liabilities and Stockholder's Equity      $402,592     $322,510 
                                                     =======    ========= 
</TABLE>

  The accompanying notes are an integral part of these financial statements. 

                                     F-45 
<PAGE> 

                        COVANCE INC. AND SUBSIDIARIES 
         (an indirect wholly-owned business of Corning Incorporated) 
                    INTERIM COMBINED STATEMENTS OF INCOME 
 FOR THE THREE AND NINE MONTHS ENDED SEPTEMBER 30, 1996 AND 1995 (UNAUDITED) 

<TABLE>
<CAPTION>
                                              Three Months Ended      Nine Months Ended 
                                              ---------------------  ---------------------- 
(Amounts in thousands)                         1996          1995       1996         1995 
 ----------------------------------------   ------------   ---------   ---------  ---------- 
<S>                                         <C>            <C>        <C>         <C>
Net revenues                                 $ 127,179     $106,099   $357,406     $302,886 
Cost and expenses 
  Cost of revenue                              83,204        70,057    232,828      198,820 
  Selling, general and administrative 
   expenses                                    20,627        16,882     57,573       46,965 
  Restructuring charge                             --            --         --        4,616 
  Depreciation and amortization                 5,846         5,489     18,130       16,166 
                                              ----------     -------    -------     -------- 
    Total                                     109,677        92,428    308,531      266,567 
                                              ----------     -------    -------     -------- 
Income from operations                         17,502        13,671     48,875       36,319 
                                              ----------     -------    -------     -------- 
Other expense 
  Interest expense, net                         1,871         1,167      4,536        3,918 
Foreign exchange loss                            (321)         (936)      (212)        (609) 
                                              ----------     -------    -------     -------- 
                                                1,550           231      4,324        3,309 
                                              ----------     -------    -------     -------- 
Income before taxes and equity investee 
  losses                                       15,952        13,440     44,551       33,010 
Taxes on income                                 6,931         5,771     19,411       14,147 
Equity investee loss (gain)                       (53)          153        (68)         351 
                                            ------------   ---------   ---------  ---------- 
Net income                                   $  9,074      $   7,516  $ 25,208     $ 18,512 
                                            ============   =========   =========  ========== 
</TABLE>

  The accompanying notes are an integral part of these financial statements. 

                                     F-46 
<PAGE> 

                        COVANCE INC. AND SUBSIDIARIES 
         (an indirect wholly-owned business of Corning Incorporated) 
                  INTERIM COMBINED STATEMENTS OF CASH FLOWS 
      FOR THE NINE MONTHS ENDED SEPTEMBER 30, 1996 AND 1995 (UNAUDITED) 

<TABLE>
<CAPTION>
 (Amounts in thousands)                                1996         1995 
                                                      ---------   ---------- 
<S>                                                  <C>          <C>
Cash flows from operating activities 
Net income                                           $ 25,208     $ 18,512 
Adjustments to reconcile net income to net 
  cash provided by operating activities: 
  Depreciation and amortization                        18,130       16,166 
  Restructuring reserve, net of cash paid                  --        3,749 
  Deferred income tax provision                           241       (3,867) 
  Related party charges                                 1,552        2,406 
  Other                                                   162          901 
Changes in operating assets and liabilities: 
  Accounts receivable                                 (14,987)      (8,741) 
  Unbilled services                                   (22,365)     (10,738) 
  Inventory                                              (714)      (2,069) 
  Accounts payable                                       (177)      (4,208) 
  Accrued liabilities                                  12,084       15,923 
  Unearned revenue                                      2,932        2,419 
  Income taxes payable                                  1,777        5,948 
  Other assets and liabilities, net                    (8,922)      (3,987) 
                                                        -------    -------- 
Net cash provided by operating activities              14,921       32,414 
                                                        -------    -------- 
Cash flows from investing activities 
  Capital expenditures                                (19,977)     (25,209) 
  Acquisition of businesses                           (14,890)     (14,000) 
  Other, net                                              458          398 
                                                        -------    -------- 
Net cash used in investing activities                 (34,409)     (38,811) 
                                                        -------    -------- 
Cash flows from financing activities 
  Due to Corning Incorporated and affiliates           13,439        8,111 
  Acquisition loan from Corning Incorporated           14,890       14,000 
  Capital contributions                                    --        1,000 
  Dividends paid                                       (3,358)     (10,257) 
                                                       -------    -------- 
Net cash provided by financing activities              24,971       12,854 
                                                    ---------   ---------- 
Net change in cash and cash equivalents                 5,483        6,457 
Cash and cash equivalents, beginning of period          8,068        6,176 
                                                      ---------   ---------- 
Cash and cash equivalents, end of period             $ 13,551     $ 12,633 
                                                      =========   ========== 
</TABLE>

  The accompanying notes are an integral part of these financial statements. 

                                     F-47 
<PAGE> 

                        COVANCE INC. AND SUBSIDIARIES 
         (an indirect wholly-owned business of Corning Incorporated) 
                    NOTES TO COMBINED FINANCIAL STATEMENTS 
                                 (Unaudited) 

1. Basis of Presentation 

   The accompanying unaudited combined financial statements reflect all 
adjustments which, in the opinion of management, are necessary for a fair 
statement of the results of operations for the interim periods presented. All 
such adjustments are of a normal recurring nature. The combined financial 
statements have been compiled without audit and are subject to such year-end 
adjustments as may be considered appropriate and should be read in 
conjunction with the historical combined financial statements of Covance for 
the years ended December 31, 1995, 1994 and 1993 included elsewhere herein. 

2. Use of Estimates 

   The preparation of these unaudited combined financial statements in 
conformity with generally accepted accounting principles requires management 
to make estimates and assumptions that affect the reported amounts of assets 
and liabilities, disclosure of contingent assets and liabilities at the date 
of the financial statements and the reported amounts of revenues and expenses 
during the reporting period. Actual results could differ from these 
estimates. 

3. Taxes on Income 

   Taxes on income reflect the estimated annual effective tax rates. 

4. Acquisitions 

   In March 1996, Covance acquired all of the assets and substantially all of 
the liabilities of Health Technology Associates, Inc. ("HTA", now known as 
Covance Health Economics and Outcomes Services Inc.) for an initial cash 
payment of approximately $15.0 million in a transaction accounted for as a 
purchase business combination. In accordance with the terms of the asset 
purchase agreement, Covance is contingently obligated to pay up to an 
additional $17.0 million in contingent purchase price if HTA achieves certain 
established earnings targets during the three year period ending March 1999. 

5. Subsequent Event 

   In October 1996, Covance acquired the stock of CRS Pacamed AG (now known 
as Covance Pharmaceutical Packaging Services Inc.) for a cash payment of 
approximately $14.4 million in a transaction to be accounted for as a 
purchase business combination. 

                                     F-48 



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