27 CFR 18.42: Record of alternation.

After approval of the qualifying documents for the alternation of premises, the proprietor must execute a record each time that the premises are alternated. The record will contain the following information:

(a) Identification assigned by TTB, including the plant or registry number, of the volatile fruit-flavor concentrate plant and the distilled spirits plant or bonded wine cellar;

(b) Effective date and time of proposed change; and

(c) Description of the alternation that identifies the diagrams depicting the premises before and after the alternation.