27 C.F.R. § 19.223
(a) Distilling. Under 26 U.S.C. 5005, the distiller of spirits is liable for the tax and each proprietor or possessor of, and person in any manner interested in the use of, any still, distilling apparatus, or distillery, shall be jointly and severally liable for the tax on distilled spirits produced. However, a person, not an officer or director of a corporate proprietor, owning or having the right of control of not more than 10 percent of any class of stock of that proprietor, is not liable by reason of the stock ownership or control. Persons transferring spirits in bond are relieved of tax liability if:
(e) Withdrawn from customs custody without payment of tax. Under 26 U.S.C. 5232(a) when imported distilled spirits in bulk containers are withdrawn from customs custody and transferred to the bonded premises of a distilled spirits plant without payment of the tax imposed on imported distilled spirits by 26 U.S.C. 5001, the person operating the bonded premises of the distilled spirits plant to which spirits are transferred will become liable for the tax on the spirits upon their release from customs custody, and the importer will thereupon be relieved of liability for the tax.
(26 U.S.C. 5005, 5066, 5232)