27 CFR § 29.53
Identification of distilling apparatus
April 24, 2020
(a) General. Each still or condenser manufactured will be identified by the manufacturer as follows:
(1) Name of manufacturer.
(2) Address of manufacturer.
(3) Manufacturer's serial number for the apparatus.
(b) Marking requirements. The apparatus will be identified in a legible and durable manner. The required identification marks will be placed on the apparatus in a location where they will not be obscured or concealed.