Code of Federal Regulations Title 48. Federal Acquisition Regulations System 48.213.306 SF 44, Purchase Order–Invoice–Voucher

(A) Fuel and oil. U.S. Government fuel cards may be used in lieu of an SF 44 for fuel, oil, and authorized refueling-related items (see PGI 213.306 for procedures on use of fuel cards);

(B) Overseas transactions by contracting officers in support of a contingency operation as defined in 10 U.S.C. 101(a)(13) or a humanitarian or peacekeeping operation as defined in 10 U.S.C. 2302(8);  and

(C) Transactions in support of intelligence and other specialized activities addressed by Part 2.7 of Executive Order 12333.