CAB/LEG/24.1 Page 8 shall be permitted only on the authorization in each case of the highest competent authority and only if required in the national interest or for scientific purposes; and (b) 2. species in Class B shall be totally protected, but may be hunted, killed, captured or collected under special authorization granted by the competent authority. The competent authority of each Contracting State shall examine the necessity of applying the provisions of this article to species not listed in the annex, in order to conserve the indigenous flora and fauna of their respective countries. Such additional species shall be placed in Class A or B by the State concerned, according to its specific requirements. Article IX Traffic in Specimens and Trophies 1. 2. In the case of animal species to which Article VIII does not apply the Contracting States shall: (a) regulate trade in and transport of specimens and trophies; (b) control the application of these regulations in such a way as to prevent trade in specimens and trophies which have been illegally captured or killed or obtained. In the case of plant and animal species to which Article VIII paragraph (1) applies, the Contracting States shall: (a) take all measures similar to those in paragraph (1) (b) make the export of such specimens and trophies subject to an authorization: (1) additional to that required for their capture, killing or collecting by Article VIII; (2) which indicates their destination; (3) which shall not be given unless the specimens or trophies have been obtained legally; (4) which shall be examined prior to exportation;