27 C.F.R. § 28.161
If a proprietor of a distilled spirits plant desires to return specially denatured spirits to his plant as provided in § 28.160, he shall file a notice with the appropriate TTB officer. A copy of the notice shall be prepared for submission to the customs official, as required by § 28.162. The notice shall be executed under the penalties of perjury and shall show:
(g) Disposition to be made of specially denatured spirits, i.e. redistillation or return to processing on the bonded premises.
(Sec. 201, Pub. L. 85-859, 72 Stat. 1362, as amended, 1365, as amended (26 U.S.C. 5214, 5223))
[25 FR 5734, June 23, 1960. Redesignated at 40 FR 16835, Apr. 15, 1975, and amended by T.D. ATF-62, 44 FR 71724, Dec. 11, 1979; T.D. ATF-198, 50 FR 8561, Mar. 1, 1985; T.D. TTB-8, 69 FR 3833, Jan. 27, 2004]