Document:

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                                                                   EXHIBIT 10.30

                               AMENDING AGREEMENT

                  THIS AGREEMENT dated as of the 27th day of March 2001.
AMONG:

                  THE TORONTO-DOMINION BANK
                  a Canadian chartered bank
                  (hereinafter referred to as the "Bank")

                                                              OF THE FIRST PART;

                                     - and -

                  CERIDIAN CANADA LTD.
                  a corporation incorporated under the laws of Canada
                  (hereinafter referred to as the "Borrower")

                                                             OF THE SECOND PART;

RECITALS:

A. The Bank and the Borrower entered into a Credit Agreement dated January 30,
1998 (the "Term Credit Agreement") pursuant to which the Bank provided to the
Borrower a reducing, revolving term facility;

B. The Bank also provided an operating line of credit to the Borrower as set out
in an advisory letter dated February 18, 1998 (the Advisory Letter and Term
Credit Agreement, hereinafter collectively referred to as the "Credit
Agreement");

C. Ceridian Corporation ("Old Ceridian") provided a Guarantee in support of all
of the obligations of the Borrower to the Bank including without limitation the
obligations under the Credit Agreement;

D. Pursuant to a transaction scheduled to be completed on or about March 30,
2001 (the "Separation"), Old Ceridian will transfer the majority of its assets,
liabilities and operations (excluding those assets, liabilities and operations
related to its media audience measurement business) and shares of its
subsidiaries, including the shares of Ceridian Canada Holdings, Inc., to New
Ceridian Corporation ("New Ceridian") which is currently a wholly owned
subsidiary of Old Ceridian;
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                                     - 2 -

E. Immediately following the Separation, Old Ceridian will change its name to
Arbitron Inc. and New Ceridian will change its name to Ceridian Corporation;

F. New Ceridian has agreed to assume all of the liability and obligations of Old
Ceridian under the Guarantee upon completion of the Separation; and

G. As result of the assumption of the Guarantee by New Ceridian, the parties
have agreed to amend the terms of the Credit Agreement as set out herein.

NOW THEREFORE THIS INDENTURE WITNESSETH that in consideration of the premises
and other good and valuable consideration, the parties hereto hereby covenant,
undertake, and agree as follows:

1.       Unless otherwise defined herein, all terms used herein shall have the
         same meaning as set out in the Credit Agreement.

2.       Effective as of the effective date of the Separation, the parties
         hereby agree to amend to Appendix A to the Credit Agreement as follows:

         (a)      The reference to Guarantor shall be amended to refer to New
                  Ceridian and its successors and assigns;

         (b)      The reference to the Guarantor Credit Agreement shall be
                  amended to read the Credit Agreement dated as of January 31,
                  2001 among New Ceridian, Bank of America N.A. as agent and The
                  Other Lenders as amended from time to time.

3.       Effective as at the time of Separation, Section 6.01 of the Term Credit
         Agreement shall be amended to replace the address of the Guarantor with
         3311 East Old Shakopee Road, Minneapolis, MN 55425-1640.

4.       Except as amended herein all other terms and conditions of the Credit
         Agreement shall continue in full force and effect and unamended by this
         Amending Agreement.

5.       Each of the Bank and the Borrower shall do, perform, execute and
         deliver all acts, deeds and documents as may be necessary from time to
         time to give full force and effect to the intent of this Amending
         Agreement.

6.       This Amending Agreement may be executed in several counterparts, each
         of which when so executed shall be deemed to be an original and such
         counterparts together shall constitute one and the same instrument and
         shall be effective as of the formal date hereof.

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                                     - 3 -

7.       This Amending Agreement shall enure to the benefit of and be binding
         upon the parties hereto and their respective successors and assigns and
         shall supercede and replace any other priority or similar agreement
         executed by the parties with respect to the matters contained herein.

8.       This Amending Agreement shall be governed by and construed in
         accordance with the laws of the Province of Ontario.

IN WITNESS WHEREOF the parties hereto have executed this Amending Agreement
under the hands of their duly authorized officers.

                            THE TORONTO-DOMINION BANK

                            By:      /s/ Keith M. McQueen
                                     -------------------------------------------

                            Title:   Vice President & Director Corporate  Credit
                                     -------------------------------------------

                            CERIDIAN CANADA LTD.

                            By:      /s/ John H. Grierson

                            Title:   Vice President and Treasurer<PAGE>   1
                                                                   EXHIBIT 10.32
                        AMENDMENT TO GUARANTEE AGREEMENT

TO:      THE TORONTO-DOMINION BANK

WHEREAS Ceridian Corporation ("Old Ceridian") provided a Guarantee Agreement,
dated January 30, 1998 (the "Guarantee") in support of Ceridian Canada Ltd.'s
(the "Borrower") obligations to The Toronto-Dominion Bank (the "Bank");

AND WHEREAS pursuant to a transaction scheduled to be completed on or about
March 30, 2001 (the "Separation"), Old Ceridian will transfer the majority of
its assets, liabilities and operations (excluding those assets, liabilities and
operations related to its media audience measurement business) and shares of its
subsidiaries, including the shares of Ceridian Canada Holdings, Inc., to New
Ceridian Corporation ("New Ceridian") which is currently a wholly owned
subsidiary of Old Ceridian;

AND WHEREAS immediately following the Separation, Old Ceridian will change its
name to Arbitron Inc. and New Ceridian will change its name to Ceridian
Corporation;

AND WHEREAS New Ceridian has agreed to assume all of the obligations and
liability of Old Ceridian under the Guarantee and to amend the terms of the
Guarantee as set out herein;

NOW THEREFORE THIS AMENDING AGREEMENT WITNESSETH that in consideration of the
mutual terms and conditions herein contained, and other good and valuable
consideration (the receipt and sufficiency of which is hereby acknowledged by
the parties hereto), New Ceridian hereby covenants and agrees for the benefit of
the Bank as follows:

1.       Unless otherwise defined or amended all defined terms used herein shall
         have the same meaning as set out in the Guarantee.

2.       New Ceridian hereby assumes and hereby agrees that it is responsible
         for all of the obligations and liabilities of Ceridian Corporation
         under the Guarantee and agrees that it shall be bound by all of the
         terms, conditions, covenants and representations and warranties set out
         in the Guarantee as though New Ceridian were the original guarantor
         thereunder.

3.       Effective as of the effective time of the Separation all references to
         Guarantor in the Guarantee shall refer to and mean New Ceridian.

4        It is agreed effective as of the effective time of the Separation that
         the reference to the Guarantor Credit Agreement in section 4 of the
         Guarantee shall mean the

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                                      -2-

         Credit Agreement dated as of January 31, 2001 among New Ceridian, and
         Bank of America N.A. and The Other Lenders as amended from time to time
         (the "New Credit Agreement").

5.       It is agreed effective as of the effective time of the Separation that
         the reference to the Financial Covenants in section 4 of the Guarantee
         shall be to the financial covenants set out in the New Credit
         Agreement.

6.       Except as amended herein all other terms and conditions of the
         Guarantee shall continue in full force and effect and unamended by this
         Amending Agreement.

7.       This Amending Agreement shall be governed by and construed in
         accordance with the laws of the Province of Ontario.

IN WITNESS WHEREOF New Ceridian hereto have executed this Amending Agreement
under the hands of its duly authorized officers this 27th day of March, 2001.

NEW CERIDIAN CORPORATION

By:      /s/ John H. Grierson

Title:   Vice President and Treasurer

To:      New Ceridian Corporation

And To:  Old Ceridian Corporation

The Toronto-Dominion Bank hereby agrees to this Amending Agreement and hereby
fully releases Old Ceridian from all of its obligations and liability under the
Guarantee effective as of the effective time of the Separation.

Dated at the City of Toronto this 27th day of March, 2001.

THE TORONTO-DOMINION BANK

By:     /s/ Keith N. McQueen
        --------------------------------------

Title:  Vice President & Director Corporate Credit
        ------------------------------------------<PAGE>   1
                                                               EXHIBIT 10.34

CIBC
                                                Ron D. Craven
                                                Commercial Lending Specialist
                                                -------------------------
                                                Winnipeg Commercial Banking
                                                Centre
                                                500-One Lombard Place
                                                Winnipeg, MB
                                                R3C 2P3

                                            August 17, 1999
Mr. D. B. Kunau
Assistant Treasurer
Ceridian Corporation
8100 34th Avenue South
Minneapolis, MN
55425-1640

Dear Mr. Kunau:

                      AMENDMENT NUMBER 1
                      CERIDIAN CANADA LTD.
                      CREDIT AGREEMENT DATED MARCH 1, 1998
                      ------------------------------------

We refer to the above agreement and our discussions concerning a review of the
credit limits including Facility B which is subject to annual review as per
Section 5.2(b). Based on our discussions we confirm the following changes:

         -  The credit limit for Facility A has been permanently reduced to
            $45,000,000.
         -  The credit limit for Facility B has been reduced to $3,000,000.

         Standby Fees-
         -  The standby fee recorded in Section 4.5 for Facility A is now being
            calculated on the reduced authorized limit.
         -  The standby fee for Facility B as set out in Section 4.5 is
            now waived.

Please acknowledge receipt of these amendments on the enclosed copy of this
letter. The next annual review is scheduled for April 30, 2000.

Yours truly,

/s/R.D. Craven
Commercial Lending Specialist

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                                               ----------------
                                               Tel:  204-944-5033
                                               Fax:  204-943-8347

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              Acknowledgment:   The undersigned acknowledges receipt of a copy
                                of this Agreement.

                                Accepted this 30th day of August, 1999.

              CERIDIAN CANADA LTD.

                 By:     /s/John H. Grierson   By:    /s/James R. Burkle

                 Name:   John H. Grierson      Name:  James R. Burkle

                 Title:  Vice President        Title: Vice President
                         & Treasurer

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