27 C.F.R. § 29.49
(c) Filing. The notice will be filed in accordance with the instructions in the letter of the appropriate TTB officer. A copy of the notice will be retained at the manufacturer's place of business as provided by § 29.59.
(Approved by the Office of Management and Budget under control number 1512-0341)
(Sec. 843, Pub. L. 98-369, 98 Stat. 818 (26 U.S.C. 5101))
[T.D. ATF-207, 50 FR 23682, June 5, 1985, as amended by T.D. ATF-439, 66 FR 8769, Feb. 2, 2001]