213.306 SF 44, Purchase Order-Invoice-Voucher.
(a)(1) The micro-purchase limitation applies to all purchases, except that purchases not exceeding the simplified acquisition threshold may be made for-
(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.