27 C.F.R. § 27.61 Containers of distilled spirits to bear closures.
Title 27 - Alcohol, Tobacco Products and Firearms
No person shall transport, buy, possess, or sell, or transfer any imported distilled spirits in containers of 1 gallon (3.785 liters) or less, unless the immediate container thereof has a closure or other device affixed in accordance with the provisions of this part. (Sec. 454, Pub. L. 98–369, 98 Stat. 494 (26 U.S.C. 5301)) [T.D. ATF–206, 50 FR 23955, June 7, 1985]
Title 27: Alcohol, Tobacco and Firearms
PART 27—IMPORTATION OF DISTILLED SPIRITS, WINES, AND BEER
Subpart E—General Requirements
Closures for Containers of Distilled Spirits
§ 27.61 Containers of distilled spirits to bear closures.

