Document:

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                                                                    EXHIBIT 10.1

                             AMENDMENT NO. 4 TO THE
                           NOBLE DRILLING CORPORATION
                               401(k) SAVINGS PLAN

         Pursuant to the provisions of Section 8.1 thereof, the Noble Drilling
Corporation 401(k) Savings Plan (the "Plan") is hereby amended in the following
respect only:

         Section 1.1(i) of the Plan is hereby amended by restatement in its
entirety to read as follows:

                  (i) "Company Stock" means the ordinary shares of Noble
         Corporation, a Cayman Islands exempted company limited by shares.

         IN WITNESS WHEREOF, this Amendment has been executed by Noble Drilling
Corporation on behalf of all Employers to be effective as of May 1, 2002.

                                              NOBLE DRILLING CORPORATION

                                              By /s/ Robert D. Campbell
                                                 -------------------------------
                                                 Robert D. Campbell, President<PAGE>
                                                                    EXHIBIT 10.1

                                    AMENDMENT
                           EFFECTIVE AS OF MAY 1, 2002

                                     TO THE

                           NOBLE DRILLING CORPORATION
                   1991 STOCK OPTION AND RESTRICTED STOCK PLAN

                  WHEREAS, Noble Drilling Corporation, a Delaware corporation
("Noble-Delaware"), established the Noble Drilling Corporation 1991 Stock Option
and Restricted Stock Plan (the "1991 Plan"), and reserved the right of its Board
of Directors under the conditions specified in Section 15 thereof to amend the
1991 Plan without obtaining shareholder approval; and

                  WHEREAS, Noble-Delaware entered into that certain Agreement
and Plan of Merger (the "Merger Agreement"), dated as of March 11, 2002, by and
among Noble-Delaware, Noble Corporation, a Cayman Islands exempted company
limited by shares ("Noble-Cayman"), Noble Holding (U.S.) Corporation, a Delaware
corporation ("Holdco"), and Noble Cayman Acquisition Corporation, a Delaware
corporation ("Merger Sub"); and

                  WHEREAS, pursuant to the Merger Agreement, on April 30, 2002,
Merger Sub merged with and into Noble-Delaware, with Noble-Delaware being the
surviving corporation and becoming an indirect, wholly owned subsidiary of
Noble-Cayman, and each issued and outstanding share of common stock, par value
US$0.10 per share, of Noble-Delaware automatically became one ordinary share,
par value US$0.10 per share, of Noble-Cayman (collectively, the
"Reorganization"); and

                  WHEREAS, pursuant to Section 4.1 of the Merger Agreement, the
Assumed Plans (as defined therein) of Noble-Delaware were assumed by
Noble-Cayman at the Effective Time (as defined therein) and continue as plans
and agreements of Noble-Cayman; and

                  WHEREAS, the 1991 Plan is an Assumed Plan as defined in the
Merger Agreement and therefore was assumed by Noble-Cayman at the Effective Time
and has continued as a plan and agreement of Noble-Cayman since the Effective
Time; and

                  WHEREAS, pursuant to Section 4.1(c) of the Merger Agreement,
which provides for necessary and appropriate amendments with respect to the
Assumed Plans, Noble-Cayman desires to amend the 1991 Plan to reflect the
Reorganization;

                  NOW THEREFORE, Noble-Cayman does hereby assume the sponsorship
of the 1991 Plan and does hereby amend the 1991 Plan, effective from and after
the Effective Time, to provide for the Reorganization and to provide for certain
other changes as follows:

         1. The 1991 Plan shall be renamed the "Noble Corporation 1991 Stock
Option and Restricted Stock Plan."

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         2. All references in the 1991 Plan to "Noble Drilling Corporation"
shall be amended to refer to "Noble Corporation."

         3. All references in the 1991 Plan to "common stock" or "shares of
Common Stock" are amended to refer to "Ordinary Shares," and all references to
"stock" or "shares of stock" are amended to refer to "shares." All references to
"stockholders" shall be amended to refer to "members."

         4. Subsection 2(f) of the 1991 Plan is deleted in its entirety and the
following is substituted therefor:

         "(f) 'Company' means Noble Corporation, a Cayman Islands exempted
company limited by shares."

         5. Subsection 2(v) of the 1991 Plan is deleted in its entirety and the
following is substituted therefor:

         "(v) 'Share' means a share of the Company's present ordinary shares,
par value US$0.10 per share, and any share or shares of capital securities or
other securities of the Company hereafter issued or issuable in respect of or in
substitution or exchange for each such present share."

         6. All references in the 1991 Plan to "bylaws" shall be amended to
refer to "articles of association," and all references to "certificate of
incorporation" shall be amended to refer to "memorandum of association."

         7. Section 4(e) of the 1991 Plan shall be deleted in its entirety.

         8. This Amendment No. 5 shall amend only those provisions of the 1991
Plan set forth herein, and those sections, subsections, phrases or words not
expressly amended hereby shall remain in full force and effect.

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                  IN WITNESS WHEREOF, the undersigned has executed this
Amendment to be effective as of the date first above written.

                                          NOBLE CORPORATION

                                          By: /s/ ROBERT D. CAMPBELL
                                             -----------------------------------
                                             Robert D. Campbell,
                                             President

                                       3<PAGE>

                                  EXHIBIT 10.1

                      SECOND AMENDMENT TO CREDIT AGREEMENT

     THIS SECOND AMENDMENT TO CREDIT AGREEMENT (this "Amendment") is made as of
the 28th day of February, 2002, by and among BELDEN INC., a Delaware corporation
(the "Borrower"), the LENDERS listed on the signature pages hereof, SUNTRUST
BANK, as Syndication Agent (the "Syndication Agent"), FIRSTAR BANK, N.A., as
Documentation Agent (the "Documentation Agent"), and WACHOVIA BANK, N.A., as
Administrative Agent (the "Agent").

                                R E C I T A L S:
                                ----------------

     The Borrower, the Syndication Agent, the Documentation Agent, the Agent and
the Lenders have entered into a certain Credit Agreement dated as of June 21,
2001, as amended by that First Amendment to Credit Agreement dated as of October
31, 2001 (as amended, the "Credit Agreement"). Capitalized terms used in this
Amendment which are not otherwise defined in this Amendment shall have the
respective meanings assigned to them in the Credit Agreement.

     The Borrower has requested the Agent and the Lenders to amend the Credit
Agreement as more fully set forth herein. The Lenders, the Agent and the
Borrower desire to amend the Credit Agreement upon the terms and conditions
hereinafter set forth.

     NOW, THEREFORE, in consideration of the Recitals and the mutual promises
contained herein and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the Borrower, the Agent and the
Lenders, intending to be legally bound hereby, agree as follows:

     SECTION 1. Recitals. The Recitals are incorporated herein by reference and
shall be deemed to be a part of this Amendment.

     SECTION 2. Amendments. The Credit Agreement is hereby amended as set forth
in this Section 2.

     SECTION 2.1. Section 1.01 of the Credit Agreement is hereby amended by
amending and restating the definitions of "Consolidated EBIT", "Debt" and
"Long-Term Debt" and adding the definition of "Hedging Agreements" to read in
their entirety as follows:

          "Consolidated EBIT" for any period means the sum of (i) Consolidated
     Net Income for such period, (ii) Consolidated Interest Expense for such
     period and (iii) provision for taxes based on income for such period,
     provided that (a) in calculating Consolidated Net Income for purposes of
     this definition, there shall be excluded (i) non-cash non-recurring charges
     of the Borrower in connection with the write-off of Complas, Inc. in the
     Fiscal Quarter ended September 30, 2001, in an amount not to exceed
     $8,334,000 in the aggregate, (ii) non-recurring charges

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     of the Borrower in connection with the Borrower's European and United
     States restructuring in the Fiscal Quarters ending March 30, 2002 and June
     30, 2002, in an amount not to exceed $3,010,000 in the aggregate, (iii)
     non-recurring charges of the Borrower in connection with severance costs in
     the Borrower's Communications Division in the Fiscal Quarter ended
     September 30, 2001, in an amount not to exceed $543,000 in the aggregate,
     and (iv) extraordinary or other non-operating gains and losses, (b) any
     Consolidated Subsidiary acquired during such period by the Borrower or any
     other Consolidated Subsidiary shall be included on a pro forma, historical
     basis as if it had been a Consolidated Subsidiary during such entire
     period, and (c) any amounts which would be included in a determination of
     Consolidated EBIT for such period with respect to assets acquired during
     such period by the Borrower or any Consolidated Subsidiary shall be
     included in the determination of Consolidated EBIT for such period and the
     amount thereof shall be calculated on a pro forma, historical basis as if
     such assets had been acquired by the Borrower or such Consolidated
     Subsidiary prior to the first day of such period.

          "Debt" of any Person means at any date, without duplication, (i) all
     obligations of such Person for borrowed money, (ii) all obligations of such
     Person evidenced by bonds, debentures, notes or other similar instruments,
     (iii) all obligations of such Person to pay the deferred purchase price of
     property or services, except trade accounts payable arising in the ordinary
     course of business, (iv) all obligations of such Person as lessee under
     capital leases, (v) all obligations of such Person to reimburse any bank or
     other Person in respect of amounts payable under a banker's acceptance,
     (vi) all Redeemable Preferred Stock of such Person (in the event such
     Person is a corporation), (vii) all obligations of such Person to reimburse
     any bank or other Person in respect of amounts paid or to be paid under a
     letter of credit or similar instrument, (viii) all Debt of others secured
     by a Lien on any asset of such Person, whether or not such Debt is assumed
     by such Person, (ix) all obligations of such Person with respect to
     interest rate protection agreements, foreign currency exchange agreements
     or other hedging arrangements ("Hedging Agreements") (valued as the
     termination value thereof computed in accordance with a method approved by
     the International Swap Dealers Association and agreed to by such Person in
     the applicable hedging agreement, if any), (x) all principal amounts
     outstanding and owed to parties other than the Borrower or any Subsidiary
     under the items described in clause (a) of the definition of Receivables
     Program Obligations, (xi) all Debt of others Guaranteed by such Person and
     (xii) the principal portion of all obligations of such Person 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 under GAAP.

          "Hedging Agreements" has the meaning assigned to it in the definition
     of Debt.

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          "Long-Term Debt" means any Debt (other than, for purposes of Section
     6.13 only, Hedging Agreements) of the Borrower or any Subsidiary having a
     maturity of more than 1 year from the date as of which the amount thereof
     is to be determined or having a maturity of less than 1 year but by its
     terms being renewable or extendible beyond 1 year from such date at the
     option of the obligor.

     SECTION 2.2. Section 6.10 of the Credit Agreement is hereby amended and
restated in its entirety to read as follows:

          SECTION 6.10 MINIMUM INTEREST COVERAGE. The Interest Coverage Ratio at
     the end of each Fiscal Quarter (a) for the period of 4 consecutive Fiscal
     Quarters ending on March 31, 2002 and June 30, 2002 will not be equal to or
     less than 2.60 to 1.0, (b) for the period of 4 consecutive Fiscal Quarters
     ending on September 30, 2002 will not be equal to or less than 2.80 to 1.0
     and (c) for the period of 4 consecutive Fiscal Quarters then most recently
     ended on or after December 31, 2002 will not be equal to or less than 3.0
     to 1.0.

     SECTION 3. Conditions to Effectiveness. The effectiveness of this Amendment
and the obligations of the Lenders hereunder are subject to the following
conditions, unless the Required Lenders waive such conditions:

          (a)  receipt by the Agent from each of the parties hereto of a duly
     executed counterpart of this Amendment signed by such party;

          (b)  the fact that the representations and warranties of the Borrower
     contained in Section 5 of this Amendment shall be true on and as of the
     date hereof; and

          (c)  receipt by the Agent from the Borrower for the ratable account of
     the Lenders executing this Amendment of fees in an amount equal to 0.075%
     times the aggregate amount of the Commitments on the date of this
     Amendment.

     SECTION 4. No Other Amendment. Except for the amendment set forth above,
the text of the Credit Agreement shall remain unchanged and in full force and
effect. This Amendment is not intended to effect, nor shall it be construed as,
a novation. The Credit Agreement and this Amendment shall be construed together
as a single agreement. Nothing herein contained shall waive, annul, vary or
affect any provision, condition, covenant or agreement contained in the Credit
Agreement, except as herein amended, nor affect nor impair any rights, powers or
remedies under the Credit Agreement as hereby amended. The Lenders and the Agent
do hereby reserve all of their rights and remedies against all parties who may
be or may hereafter become secondarily liable for the repayment of the Notes.
The Borrower promises and agrees to perform all of the requirements, conditions,
agreements and obligations under the terms of the Credit Agreement, as hereby
amended, the Credit Agreement, as hereby amended, being hereby ratified and
affirmed. The Borrower hereby expressly agrees that the Credit Agreement, as
hereby amended, is in full force and effect.

     SECTION 5. Representations and Warranties. The Borrower hereby represents
and warrants to each of the Lenders as follows:

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          (a)  No Default has occurred and is continuing unwaived by the Lenders
     on the date hereof.

          (b)  The Borrower has the power and authority to enter into this
     Amendment and to do all acts and things as are required or contemplated
     hereunder to be done, observed and performed by it.

          (c)  This Amendment has been duly authorized, validly executed and
     delivered by one or more authorized officers of the Borrower and
     constitutes legal, valid and binding obligations of the Borrower
     enforceable against it in accordance with its terms, provided that such
     enforceability is subject to general principles of equity and to
     bankruptcy, insolvency and similar laws affecting the enforcement of
     creditors' rights generally.

          (d)  The execution and delivery of this Amendment and the Borrower's
     performance hereunder do not and will not require the consent or approval
     of any regulatory authority or governmental authority or agency having
     jurisdiction over the Borrower, nor be in contravention of or in conflict
     with the articles of incorporation or bylaws of the Borrower, or the
     provision of any statute, or (unless any such contravention or conflict
     would not reasonably be expected to have a Material Adverse Effect) any
     judgment, order or indenture, instrument, agreement or undertaking, to
     which the Borrower is party or by which the Borrower's assets or properties
     are or may become bound.

     SECTION 6. Counterparts. This Amendment may be executed in multiple
counterparts, each of which shall be deemed to be an original and all of which,
taken together, shall constitute one and the same agreement.

     SECTION 7. Governing Law. This Amendment shall be construed in accordance
with and governed by the laws of the State of Georgia.

                [Remainder of this page intentionally left blank]

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     IN WITNESS WHEREOF, the parties hereto have executed and delivered, or have
caused their respective duly authorized officers or representatives to execute
and deliver, this Amendment as of the day and year first above written.

                                        BORROWER:

                                        BELDEN INC.

                                        By: /s/ Stephen H. Johnson        (SEAL)
                                            ------------------------------------
                                            Name:  Stephen H. Johnson
                                            Title: Treasurer

                                       5

<PAGE>

                                        WACHOVIA BANK, N.A., as Administrative
                                        agent and as a Lender

                                        By: /s/ David K. Hall             (SEAL)
                                            ------------------------------------
                                            Name:  David K. Hall
                                            Title: Vice President

                                       6

<PAGE>

                                        SUNTRUST BANK, as Syndication Agent
                                        and as a Lender

                                        By: /s/ Linda L. Dash             (SEAL)
                                            ------------------------------------
                                            Name:  Linda L. Dash
                                            Title: Vice President

                                       7

<PAGE>

                                        FIRSTAR BANK, N.A., as Documentation
                                        Agent and as a Lender

                                        By: /s/ Eric Hartman              (SEAL)
                                            ------------------------------------
                                            Name:  Eric Hartman
                                            Title: Vice President

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<PAGE>

                                        ING BARINGS

                                        By: /s/ B. F. G. Jacobs           (SEAL)
                                            ------------------------------------
                                            Name:  B. F. G. Jacobs
                                            Title: Treasurer

                                       9

<PAGE>

                                        COMERICA BANK, as a Lender

                                        By: /s/ Neran Shaya               (SEAL)
                                            ------------------------------------
                                            Name:  Neran Shaya
                                            Title: Vice President

                                       10

<PAGE>

                                        THE NORTHERN TRUST COMPANY, as a Lender

                                        By: /s/ Fredric McClendon         (SEAL)
                                            ------------------------------------
                                            Name:  Fredric McClendon
                                            Title: Vice President

                                       11

<PAGE>

                                        THE INDUSTRIAL BANK OF JAPAN, LIMITED,
                                        as a Lender

                                        By: /s/ Walter R. Wolff           (SEAL)
                                            ------------------------------------
                                            Name:  Walter R. Wolff
                                            Title: Joint General Manager and
                                                   Group Head

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<PAGE>

Consented and agreed to by:

BELDEN COMMUNICATIONS COMPANY

By: /s/ Stephen H. Johnson        (SEAL)
    ------------------------------------
    Name:  Stephen H. Johnson
    Title: Treasurer

BELDEN WIRE & CABLE COMPANY

By: /s/ Stephen H. Johnson        (SEAL)
    ------------------------------------
    Name:  Stephen H. Johnson
    Title: Treasurer

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