---
kind: "unit"
title: "50"
title_heading: "Wildlife and Fisheries"
key: "chIV/subchA"
level: "subchap"
label: "Subchapter A"
heading: "Subchapter A"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/50/chIV-subchA"
sections_count: 88
---

# Subchapter A — Subchapter A

Title 50 C.F.R. — Wildlife and Fisheries › Chapter IV — Joint Regulations (united States Fish and Wildlife Service, Department of the Interior and National Marine Fisheries Service, National Oceanic and Atmospheric Administration, Department of Commerce); Endangered Species Committee Regulations

## Contents

- [Part 400 — Part 400 [reserved]](/cfr/50/chIV-subchA-part400.md)
- [Part 401 — Anadromous Fisheries Conservation, Development and Enhancement](/cfr/50/chIV-subchA-part401.md)
- [Part 402 — Interagency Cooperation—endangered Species Act of 1973, as Amended](/cfr/50/chIV-subchA-part402.md)
- [Part 403 — Transfer of Marine Mammal Management Authority to States](/cfr/50/chIV-subchA-part403.md)
- [Part 404 — Papahānaumokuākea Marine National Monument](/cfr/50/chIV-subchA-part404.md)
- [Part 424 — Listing Endangered and Threatened Species and Designating Critical Habitat](/cfr/50/chIV-subchA-part424.md)