Any proprietor using the optional method for determination of proof for spirits containing solids of 400 milligrams or less per 100 milligrams as provided in § 30.71 shall record the obscuration so determined on the record of gauge required by 27 CFR part 19.
(Sec. 201, Pub. L. 85-859, 72 Stat. 1358, as amended, 1362, as amended (26 U.S.C. 5211))
source: T.D. ATF-198, 50 FR 8535, Mar. 1, 1985, unless otherwise noted.
cite as: 27 CFR 30.72