27 C.F.R. § 24.256 Bottle aging wine.
Title 27 - Alcohol, Tobacco Products and Firearms
Wine bottled or packed and stored for the purpose of aging need not have labels affixed until the wine is removed for consumption or sale. However, the bins, pallets, stacks, cases or containers of unlabeled wine will be marked in some manner to show the kind (class and type) and alcohol content of the wine. If the unlabeled wine is stored at a location other than the bottling or packing winery, the registry number of the bottling or packing winery will also be shown. (Sec. 201, Pub. L. 85–859, 72 Stat. 1381, as amended, 1407, as amended (26 U.S.C. 5368, 5662))
Title 27: Alcohol, Tobacco and Firearms
PART 24—WINE
Subpart L—Storage, Treatment and Finishing of Wine
Bottling, Packing, and Labeling of Wine
§ 24.256 Bottle aging wine.