27 CFR § 19.486 - Change of packages in storage.
When a proprietor transfers spirits from one package to another as permitted in § 19.325, the proprietor must give the new package the same package identification number and marks as the original package. The proprietor must also prepare and sign a label to be affixed to the head of each new package. The label must be in the following form:
The spirits in this ______ [kind of cooperage: barrel or drum], package identification No. ____, were transferred from a ______ [kind of cooperage: barrel or drum], on _______ [Date], _______ [Proprietor]