Section 17.1 - Purpose of regulations(a) The regulations in this part implement the Endangered Species Act of 1973, 87 Stat. 884, 16 U.S.C. 1531 - 1543 , except for those provisions in the Act concerning the Convention on International Trade in Endangered Species of Wild Fauna and Flora, for which regulations are provided in part 23 of this subchapter.(b) The regulations identify those species of wildlife and plants determined by the Director to be endangered or threatened with extinction under section 4(a) of the Act and also carry over the species and subspecies of wildlife designated as endangered under the Endangered Species Conservation Act of 1969 (83 Stat. 275, 1 6 U.S.C. 668cc-1 to 6 ) which are deemed endangered species under section 4(c)(3) of the Act.40 FR 44415, Sept. 26, 1975, as amended at 42 FR 10465, Feb. 22, 1977