50 C.F.R. § 260.24
Inspectors
(a) Federal Government employees licensed or authorized as inspectors will perform inspections.
(b) In addition, qualified persons may be employed and licensed (Cross-Licensee) by the Agency to perform specified inspection services under a joint Federal-State inspection service arrangement.
(c) An Inspector or Cross-Licensee shall perform their duties pursuant to the regulations in this part as directed by the Director.