Except as provided in clauses (i) and (ii) of section
504
(l)(D) of title
18, no person shall alter, mutilate, imitate, or counterfeit any stamp authorized by this subchapter, or imitate or counterfeit any die, plate, or engraving therefor, or make, print, or knowingly use, sell, or have in his possession any such counterfeit, die, plate, or engraving.