CFR›Title 50›Chapter IV›50 CFR Part 424 Citation50 CFR Part 424ContainsSubparts Subpart A–Subpart BCorpusDaily eCFRDisplayed edition2026-11-06Last updated2026-11-06 PART 424—LISTING ENDANGERED AND THREATENED SPECIES AND DESIGNATING CRITICAL HABITAT Subparts Subpart A Subpart A—General Provisions Subpart B Subpart B—Revision of the Lists Authority16 U.S.C. 1531 et seq.Source49 FR 38908, Oct. 1, 1984, unless otherwise noted.