[Code of Federal Regulations] [Title 50, Volume 7] [Revised as of January 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 50CFR424.10] [Page 852] TITLE 50--WILDLIFE AND FISHERIES CHAPTER IV--JOINT REGULATIONS (UNITED STATES FISH AND WILDLIFE SERVICE, PART 424_LISTING ENDANGERED AND THREATENED SPECIES AND DESIGNATING Subpart B_Revision of the Lists Sec. 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.