27 C.F.R. § 19.722
The proprietor of an alcohol fuel plant may receive and redistill spirits. The proprietor may also receive fuel alcohol for redistillation and recovery of the spirits contained in the fuel alcohol. The following general rules apply to redistillation activities at an alcohol fuel plant:
(d) All provisions of this subpart and 26 U.S.C. chapter 51, including provisions regarding liability for tax applicable to spirits when originally produced, apply to spirits recovered by distillation.
(26 U.S.C. 5181)