Factories established prior to the effective date of this part, October 1, 1961, shall not be subject to the provisions of Sec. 40.70 if, in the opinion of the appropriate TTB officer, the existing premises afford adequate protection to the revenue. (72 Stat. 1421; 26 U.S.C. 5712) [T.D. 6871, 31 FR 33, Jan. 4, 1966. Redesignated at 40 FR 16835, Apr. 15, 1975]