CHAPTER I—UNITED STATES POSTAL SERVICE
- SUBCHAPTER A—THE BOARD OF GOVERNORS OF THE U.S. POSTAL SERVICE (parts 1 to 11)
- SUBCHAPTER B—INTERNATIONAL MAIL (parts 20 to 20)
- SUBCHAPTER C—POST OFFICE SERVICES [DOMESTIC MAIL] (parts 111 to 122)
- SUBCHAPTER D—ORGANIZATION AND ADMINISTRATION (parts 211 to 281)
- SUBCHAPTER E—RESTRICTIONS ON PRIVATE CARRIAGE OF LETTERS (parts 310 to 320)
- SUBCHAPTER F—PERSONNEL (parts 447 to 491)
- SUBCHAPTER G—POSTAGE PROGRAMS (parts 501 to 551)
- SUBCHAPTER H—PROCUREMENT SYSTEM FOR THE U.S. POSTAL SERVICE: INTELLECTUAL PROPERTY RIGHTS OTHER THAN PATENTS (parts 601 to 602)
- SUBCHAPTER J—POSTAL SERVICE DEBT OBLIGATIONS; DISBURSEMENT POSTAL MONEY ORDERS (parts 760 to 762)
- SUBCHAPTER K—ENVIRONMENTAL REGULATIONS (parts 775 to 776)
- SUBCHAPTER L—SPECIAL REGULATIONS (parts 777 to 778)
- SUBCHAPTER N—PROCEDURES (parts 912 to 966)