Section 21.13 - Nonstatutory protests(a) GAO will consider protests concerning awards of subcontracts by or for a Federal agency, sales by a Federal agency, or procurements by agencies of the government other than Federal agencies as defined in § 21.0(c) if the agency involved has agreed in writing to have protests decided by GAO.(b) The provisions of this part shall apply to nonstatutory protests except for: (1) Section 21.8(d) and (e) pertaining to recommendations for the payment of costs; and(2) Section 21.6 pertaining to the withholding of award and the suspension of contract performance pursuant to 31 U.S.C. 3553(c) and (d) .61 FR 39042, July 26, 1996, as amended at 83 FR 13825 , Apr. 2, 2018