Subchapter A
- Part 401 - ANADROMOUS FISHERIES CONSERVATION, DEVELOPMENT AND ENHANCEMENT (§§ 401.1 — 401.23)
- Part 402 - INTERAGENCY COOPERATION-ENDANGERED SPECIES ACT OF 1973, AS AMENDED (§§ 402.01 — 402.48)
- Part 403 - TRANSFER OF MARINE MAMMAL MANAGEMENT AUTHORITY TO STATES (§§ 403.01 — 403.08)
- Part 404 - PAPAHANAUMOKUAKEA MARINE NATIONAL MONUMENT (§ 404)
- Part 424 - LISTING ENDANGERED AND THREATENED SPECIES AND DESIGNATING CRITICAL HABITAT (§§ 424.01 — 424.21)