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 to be placed thereon shall not be effaced, obliterated, or destroyed, on emptying such package, shall be forfeited, and the same may be seized by any officer of internal revenue wherever found; and all the provisions and penalties of R.S. §3324, relating to empty casks or packages from which the marks, brands, or stamps have not been effaced or obliterated, and relating to the removal of stamps from packages, and to having in possession any stamps so removed, shall apply to the stamps for imported spirits herein provided for, and to the casks or other packages on which such stamps shall have been used.