27 C.F.R. § 19.426
(a) Withdrawal for nonbeverage use—(1) Permit required. Agencies of the United States Government that wish to obtain either specially denatured spirits or spirits free of tax for nonbeverage purposes must apply for and receive a permit on form TTB F 5150.33 or must have a previously issued permit on ATF Form 1444. TTB issues permits to Government agencies for:
(b) Withdrawal for beverage use. Agencies of the United States Government that wish to obtain distilled spirits free of tax for beverage purposes under 26 U.S.C. 7510 must provide a proper purchase order signed by the head of the agency or an authorized designee. Each case of spirits withdrawn must bear a plain mark “For Use of the United States” in addition to the marks required by subpart S of this part. For each withdrawal under this paragraph, the proprietor must prepare a record containing the information required by § 19.611 for a record of tax determination and must mark this record “Free of Tax for Use of the United States.”
(26 U.S.C. 7510);
(26 U.S.C. 5271, 5313)