45 CFR § 670.23 - Specific issuance criteria.
Permits authorizing the taking of mammals, birds, plants, or invertebrates designated as a Specially Protected Species of mammals, birds, and plants in § 670.25 may only be issued if:
(a) There is a compelling scientific purpose for such taking;
(b) The actions allowed under any such permit will not jeopardize the existing natural ecological system, or the survival of the affected species or population;
(c) The taking involves non-lethal techniques, where appropriate. Lethal techniques may only be used on Specially Protected Species where there is no suitable alternative technique; and
(d) The authorized taking, transporting, carrying or shipping will be carried out in a humane manner.