CFR > Title 39 > Chapter I > Subchapter B > Part 20 39 CFR Part 20 – International Postal Service Current as of: 2024 | Check for updates | Other versions § 20.1 Incorporation by reference; Mailing Standards of the United States Postal Service, International Mail Manual § 20.2 Effective date of the International Mail Manual § 20.4 Amendments to the International Mail Manual
