14 C.F.R. § 125.261 Airman: Limitations on use of services.
Title 14 - Aeronautics and Space
(a) No certificate holder may use any person as an airman nor may any person serve as an airman unless that person— (1) Holds an appropriate current airman certificate issued by the FAA; (2) Has any required appropriate current airman and medical certificates in that person's possession while engaged in operations under this part; and (3) Is otherwise qualified for the operation for which that person is to be used. (b) Each airman covered by paragraph (a) of this section shall present the certificates for inspection upon the request of the Administrator.
Title 14: Aeronautics and Space
PART 125—CERTIFICATION AND OPERATIONS: AIRPLANES HAVING A SEATING CAPACITY OF 20 OR MORE PASSENGERS OR A MAXIMUM PAYLOAD CAPACITY OF 6,000 POUNDS OR MORE; AND RULES GOVERNING PERSONS ON BOARD SUCH AIRCRAFT
Subpart H—Airman and Crewmember Requirements
§ 125.261 Airman: Limitations on use of services.
