Based on title 18, U.S.C., 1940 ed., § 326 (Mar. 4, 1909, ch. 321, § 203, 35 Stat. 1127; Feb. 6, 1929, ch. 157, 45 Stat. 1153).

1970—Pub. L. 91–375 substituted “Postal Service” and “Postal Service or its representative” for “Postmaster General” and “Postmaster General or his representative”, respectively, in two places.

1951—Act Sept. 25, 1951, repealed former first paragraph relating to penalties for failure to pay postage on or unlawful conveyance of mail to or from any part of the United States by foreign vessels.

Amendment by Pub. L. 91–375 effective within 1 year after Aug. 12, 1970, on date established therefor by Board of Governors of United States Postal Service and published by it in Federal Register, see section 15(a) of Pub. L. 91–375, set out as an Effective Date note preceding section 101 of Title 39, Postal Service.