If the proprietor intends to extend or curtail any part of the plant premises, except under alternate operations that are covered by §§19.142 and 19.143, the proprietor must file form TTB F 5110.41, Registration of Distilled Spirits Plant, to amend the registration. The proprietor must not extend or curtail any premises or equipment before the amended registration is approved.

(26 U.S.C. 5172)