Regulations last checked for updates: Jun 01, 2024

Title 27 - Alcohol, Tobacco Products and Firearms last revised: May 28, 2024
§ 19.523 - Affixing closures.

Each bottle or other container of spirits having a capacity of one gallon (3.785 liters) or less must have a closure or other device securely affixed to the container prior to withdrawal from bond or customs custody. The closure or other device must be constructed in such a manner as to require breaking in order to gain access to the contents of the container.

(26 U.S.C. 5301)