27 CFR § 22.33
Time of destruction of marks and brands
April 24, 2020
(a) Any person who empties a package containing tax-free alcohol shall immediately destroy or obliterate the marks, brand, and labels required by this chapter to be placed on packages of tax-free alcohol.
(b) A person may not destroy or obliterate the marks, brands or labels until the package or drum has been emptied.
(Sec. 201, Pub. L. 85-859, 72 Stat. 1358, as amended (26 U.S.C. 5206))