27 C.F.R. § 19.454 Gauge for denaturation.
Title 27 - Alcohol, Tobacco Products and Firearms
The proprietor shall gauge spirits before denaturation and after denaturation and record each gauge on the record of denaturation as prescribed in §19.752(b). However, spirits dumped from previously gauged containers or spirits transferred directly to mixing tanks from gauge tanks where they were gauged, need not again be gauged. Measurements of spirits and denaturants shall be made by volume, weight, by approved meter, or, when approved by the appropriate TTB officer , other devices or methods. (Sec. 201, Pub. L. 85–859, 72 Stat. 1358, as amended (26 U.S.C. 5204); sec. 807, Pub. L. 96–39, 93 Stat. 286 (26 U.S.C. 5241))
Title 27: Alcohol, Tobacco and Firearms
PART 19—DISTILLED SPIRITS PLANTS
Subpart N—Denaturing Operations and Manufacture of Articles
Denaturation
§ 19.454 Gauge for denaturation.

