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                                                                    EXHIBIT 99.3

                       CERTIFICATION OF NON-FOREIGN STATUS

                             FOR INDIVIDUAL PARTNERS


     Section 1446 of the Internal Revenue Code provides that a partnership must
pay a withholding tax to the Internal Revenue Service with respect to a
partner's allocable share of the partnership's effectively connected taxable
income, if the partner is a foreign person. To inform Pioneer Natural Resources
USA, Inc., the general partner of the Parker & Parsley limited partnerships,
that the provisions of section 1446 do not apply, the undersigned hereby
certifies the following:


     1.   I am not a nonresident alien for purposes of U.S. income taxation;

     2.   My U.S. taxpayer identification number (social security number) is
          ________________ ; and

     3.   My home address is
                             ------------------------

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

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     I hereby agree that if I become a nonresident alien, I will notify the
partnership within sixty (60) days of doing so. I understand that this
certification may be disclosed to the Internal Revenue Service by the
partnership and that any false statement I have made here could be punished by
fine, imprisonment, or both.

     Under penalties of perjury I declare that I have examined this
certification and to the best of my knowledge and belief it is true, correct,
and complete.


     Executed this _____ day of ______________, 2001.


                       (Sign here)
                                  ----------------------------------------

                                  Printed Name:
                                               ---------------------------


                            IMPORTANT TAX INFORMATION


         PLEASE COMPLETE THIS CERTIFICATION, OR THE ATTACHED CERTIFICATION OF
NON-FOREIGN STATUS FOR PARTNERS THAT ARE ENTITIES, AS APPROPRIATE, TO AVOID
FEDERAL INCOME TAX WITHHOLDING UNDER SECTION 1446 OF THE INTERNAL REVENUE CODE
ON YOUR LIMITED PARTNERSHIP INCOME AND DISTRIBUTIONS, INCLUDING THE PIONEER
PARENT COMMON STOCK TO BE PAID TO YOU UPON THE MERGER OF EACH PARTNERSHIP IN
WHICH YOU OWN AN INTEREST.