Every person who empties or draws off, or causes to be emptied or drawn off, the contents of any package of imported liquors stamped as above required, shall, at the time of such emptying, efface, obliterate, and destroy the stamp thereon, and also all other marks or brands which shall have been placed thereon in accordance with the law or regulations concerning imported liquors; every cask or other package from which the stamp for imported liquors required by section 467 of this title