27 C.F.R. § 19.93 Quantity determination of spirits in bond.
Title 27 - Alcohol, Tobacco Products and Firearms
Where bulk spirits in bond are gauged for determination of tax, or are gauged in packages, the quantity shall be determined by weight pursuant to the provisions of 27 CFR part 30. In all other instances where spirits are gauged in bond, gauged for denaturation, or are gauged for transfer in bond or for withdrawal from bond free of tax or without payment of tax, the quantity may be determined by weight or volume. Volumetric determinations of quantity may be made by meters approved under §19.277. (Sec, 201, Pub. L. 85–859, 72 Stat. 1396, as amended (26 U.S.C. 5559))
Title 27: Alcohol, Tobacco and Firearms
PART 19—DISTILLED SPIRITS PLANTS
Subpart D—Administrative and Miscellaneous Provisions
Gauging of Spirits, Wines or Alcoholic Flavoring Materials
§ 19.93 Quantity determination of spirits in bond.

