VAN KAMPEN FOCUS PORTFOLIOS SERIES 251, 487, EX-99.4.1, 2000-10-20

VAN KAMPEN FOCUS PORTFOLIOS SERIES 251
487, EX-99.4.1, 2000-10-20

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                                                                     EXHIBIT 4.1

                                INTERACTIVE DATA
                           FINANCIAL TIMES Information
               100 William Street, 15th Floor, New York, NY 10038
                  USA Tel: (212) 269-6300 Fax: (212) 771-6445


                                October 19, 2000


Van Kampen Funds Inc.
One Parkview Plaza
Oakbrook Terrace, IL 60181


         Re: Van Kampen Focus Portfolios
             Internet Portfolio, Series 24A
             Internet Portfolio, Series 24B
             Morgan Stanley High-Technology 35 Index Portfolio, Series 16A,
             Morgan Stanley High-Technology 35 Index Portfolio, Series 16B
             and Utility Portfolio, Series 9 (A Unit Investment Trust)
             Registered Under the Securities Act of 1933, File No.
             333-46080


  Gentlemen:

         We have examined the Registration Statement for the above captioned
Fund, a copy of which is attached hereto.

         We hereby consent to the reference in the Prospectus and Registration
Statement for the above captioned Fund to Interactive Data Corporation, as the
Evaluator, and to the use of the Obligations prepared by us which are referred
to in such Prospectus and Statement.

         You are authorized to file copies of this letter with the Securities
and Exchange Commission.

Very truly yours,


Steve Miano
Director Fixed Income Data Operations