CFR›Title 50›Chapter IV›Part 450 ContainsSection 450.01CorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 PART 450—GENERAL PROVISIONS Sections 450.01 § 450.01 Definitions AuthorityEndangered Species Act of 1973, 16 U.S.C. 1531, et seq., as amended. Previous 424 Part 424—Listing Endangered and Threatened Species and Designating Critical Habitat Next 451 Part 451—Application Procedure