Before producing any special natural wine, the proprietor shall receive approval of the formula by which it is to be made as provided by Sec. 24.80. Any change in a formula will be approved in advance as provided by Sec. 24.81. (Sec. 201, Pub. L. 85-859, 72 Stat. 1386, as amended (26 U.S.C. 5386)) (Approved by the Office of Management and Budget under control number 1512-0059)