27 C.F.R. § 19.81 Right of entry and examination.
Title 27 - Alcohol, Tobacco Products and Firearms
Any appropriate TTB officer may at all times, as well by night as by day, enter any distilled spirits plant, or any other premises where distilled spirits operations are carried on, or structure or place used in connection therewith for storage or other purposes; to make examination of the materials, equipment, and facilities thereon; and make such gauges and inventories as he deems necessary. Whenever any appropriate TTB officer, having demanded admittance, and having declared his name and office, is not admitted into such premises by the proprietor or other person having charge thereof, he may at all times, use such force as is necessary for him to gain entry to such premises. (Sec. 201, Pub. L. 85–859, 72 Stat. 1357, as amended (26 U.S.C. 5203))
Title 27: Alcohol, Tobacco and Firearms
PART 19—DISTILLED SPIRITS PLANTS
Subpart D—Administrative and Miscellaneous Provisions
Activities Not Subject to This Part
§ 19.81 Right of entry and examination.

