Chapter I - UNITED STATES POSTAL SERVICE
- Subchapter A - THE BOARD OF GOVERNORS OF THE U.S. POSTAL SERVICE (§§ 1.1 — 11.1)
- Subchapter B - INTERNATIONAL MAIL (§§ 20.1 — 20.5)
- Subchapter C - POST OFFICE SERVICES [DOMESTIC MAIL] (§§ 111.1 — 122.2)
- Subchapter D - ORGANIZATION AND ADMINISTRATION (§§ 211.1 — 281.4)
- Subchapter E - RESTRICTIONS ON PRIVATE CARRIAGE OF LETTERS (§§ 310.1 — 320.9)
- Subchapter F - PERSONNEL (§§ 447.11 — 492.1)
- Subchapter G - POSTAGE PROGRAMS (§§ 501.1 — 551.8)
- Subchapter H - PROCUREMENT SYSTEM FOR THE U.S. POSTAL SERVICE: INTELLECTUAL PROPERTY RIGHTS OTHER THAN PATENTS (§§ 601.100 — 602.3)
- Subchapter J - POSTAL SERVICE DEBT OBLIGATIONS; DISBURSEMENT POSTAL MONEY ORDERS (§§ 760.1 — 762.45)
- Subchapter K - ENVIRONMENTAL REGULATIONS (§§ 775.1 — 776.10)
- Subchapter L - SPECIAL REGULATIONS (§§ 777.11 — 778.13)
- Subchapter N - PROCEDURES (§§ 912.1 — 966.13)