27 C.F.R. § 26.97 Marking containers of wine.
Title 27 - Alcohol, Tobacco Products and Firearms
Containers of wine of Puerto Rican manufacture which are to be shipped to the United States must be marked with the name of the winemaker, the serial number of the container, the kind and taxable grade of the wine, the gallon content, and the serial number of the withdrawal permit, Form 487B, prefixed by the number of such form, e.g., “487B–61–3.”
Title 27: Alcohol, Tobacco and Firearms
PART 26—LIQUORS AND ARTICLES FROM PUERTO RICO AND THE VIRGIN ISLANDS
Subpart E—Taxpayment of Liquors and Articles in Puerto Rico
Wine
§ 26.97 Marking containers of wine.