27 C.F.R. § 28.103
(b) Exception. When containers are being removed to a contiguous manufacturing bonded warehouse, the proprietor need not place the word “Export” on the containers if the appropriate TTB officer finds the omission will not jeopardize the revenue.
(Sec. 309, Tariff Act of 1930, 46 Stat. 690, as amended (19 U.S.C. 1309); sec. 3, Act of June 18, 1934, 48 Stat. 999, as amended (19 U.S.C. 81c); sec. 201, Pub. L. 85-859, 72 Stat. 1362, as amended (26 U.S.C. 5214); sec. 3, Pub. L. 91-659, 84 Stat. 1965, as amended (26 U.S.C. 5066))
[T.D. ATF-82, 46 FR 21158, Apr. 9, 1981, as amended by T.D. TTB-8, 69 FR 3832, Jan. 27, 2004]