CFR > Title 39 > Chapter I > Subchapter C > Part 111 39 CFR Part 111 – General Information On Postal Service Current as of: 2024 | Check for updates | Other versions § 111.1 Incorporation by reference; Mailing Standards of the United States Postal Service, Domestic Mail Manual § 111.3 Amendments to the Mailing Standards of the United States Postal Service, Domestic Mail Manual Ask a legal question, get an answer ASAP!Click here to chat with a lawyer about your rights.