48 C.F.R. § 45.604-3
45.604-3 Proceeds from sales of surplus property.
Proceeds of any sale are to be credited to the Treasury of the United States as miscellaneous receipts, unless otherwise authorized by statute or the contract or any subcontract thereunder authorizes the proceeds to be credited to the price or cost of the work (40 U.S.C. 571 and 574).