§ 421.
The Secretary of the Treasury may examine the plates, dies, bed pieces, and other material used in the printing of Federal Reserve notes and issue regulations relating to such examinations.
([Dec. 23, 1913, ch. 6, § 16] (par.), [38 Stat. 267]; [Pub. L. 103–325, title VI, § 602(g)(6)], Sept. 23, 1994, [108 Stat. 2293].)