CFR›Title 39›Chapter I›Part 20 ContainsSections 20.1–20.5CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 PART 20—INTERNATIONAL POSTAL SERVICE Sections 20.1 § 20.1 Incorporation by reference; Mailing Standards of the United States Postal Service, International Mail Manual. 20.2 § 20.2 Effective date of the International Mail Manual. 20.3 § 20.3 [Reserved] 20.4 § 20.4 Amendments to the International Mail Manual. 20.5 § 20.5 [Reserved] Authority5 U.S.C. 552(a); 13 U.S.C. 301-307; 18 U.S.C. 1692-1737; 39 U.S.C. 101, 401, 403, 404, 407, 414, 416, 3001-3011, 3201-3219, 3403-3406, 3621, 3622, 3626, 3632, 3633, and 5001.Source69 FR 59546, Oct. 5, 2004, unless otherwise noted. Previous 11 Part 11—Advisory Boards (Article XI) Next 111 Part 111—General Information on Postal Service