27 CFR §18.27
- (a)The appropriate TTB officer, to protect the revenue, may require:
- (1)Additional information in support of an application for registration;
- (2)Marks on major equipment to show serial number, capacity, and use;
- (3)Installation of meters, tanks, pipes, or other apparatus; and
- (4)Installation of security devices.
- (b)Any proprietor refusing or neglecting to comply with any requirement of this section shall not be permitted to operate.