27 CFR § 26.38
Containers of distilled spirits
April 24, 2020
Containers of distilled spirits brought into the United States from Puerto Rico, having a capacity of not more than 1 gallon (3.785 liters), shall conform to the requirements of subpart P of this part.
[T.D. ATF-34, 41 FR 46863, Oct. 26, 1976]