Based on title 18, U.S.C., 1940 ed., § 72 (Mar. 4, 1909, ch. 321, § 28, 35 Stat. 1094).

Reference to persons causing, procuring, aiding or assisting was omitted as unnecessary as such persons are made principals by section 2 of this title.

Changes were also made in phraseology.

1994—Pub. L. 103–322 substituted “fined under this title” for “fined not more than $1,000”.