Pub. L. 110–234 and Pub. L. 110–246 made identical amendments to this section. The amendments by Pub. L. 110–234 were repealed by section 4(a) of Pub. L. 110–246.

Section was formerly classified to section 377 of this title. See section 361g of this title.

2008—Pub. L. 110–246, § 7404(b)(1), in first sentence, struck out before period at end “under penalty indicia: Provided, however, That each publication shall bear such indicia as are prescribed by the United States Postal Service and shall be mailed under such regulations as the United States Postal Service may from time to time prescribe”.

1955—Act Aug. 11, 1955, amended section generally to authorize free mailing of publications by the agricultural experiment stations. For provisions which related to the unexpended balance of annual appropriation, see section 361g of this title.

Amendment of this section and repeal of Pub. L. 110–234 by Pub. L. 110–246 effective May 22, 2008, the date of enactment of Pub. L. 110–234, see section 4 of Pub. L. 110–246, set out as an Effective Date note under section 8701 of this title.

“United States Postal Service” substituted in text for “Postmaster General” pursuant to Pub. L. 91–375, § 4(a), Aug. 12, 1970, 84 Stat. 773, set out as a note under section 201 of Title 39, Postal Service, which abolished office of Postmaster General of Post Office Department and transferred its functions to United States Postal Service.