Based on title 18, U.S.C., 1940 ed., § 303 (Mar. 4, 1909, ch. 321, § 180, 35 Stat. 1123).

Reference to persons causing or procuring was omitted as unnecessary in view of definition of “principal” in section 2 of this title.

Minor verbal changes were made.

1994—Pub. L. 103–322 substituted “fined under this title” for “fined not more than $50”.