19.647—Authorized operations.
After approval of an application by TTB, a plant qualified for the production of vinegar may only:
(a)
Produce vinegar by the vaporizing process; and
(b)
Produce distilled spirits of 30° of proof or less for use in the manufacture of vinegar on the vinegar plant premises.
Code of Federal Regulations
(
26 U.S.C. 5501
)