CFR > Title 50 - 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, DEPARTM > SUBCHAPTER A— (Parts 401–424) > PART 424—LISTING ENDANGERED AND THREATENED SPECIES AND DESIGNATING CRITICAL HABITAT > SUBPART B—Revision of the Lists (§424.10 to §424.21) > 424.10—General.

424.10—General.

The Secretary may add a species to the lists or designate critical habitat, delete a species or critical habitat, change the listed status of a species, revise the boundary of an area designated as critical habitat, or adopt or modify special rules (see 50 CFR 17.40-17.48 and parts 222 and 227) applied to a threatened species only in accordance with the procedures of this part.