14 C.F.R. § 135.95 Airmen: Limitations on use of services.
Title 14 - Aeronautics and Space
No certificate holder may use the services of any person as an airman unless the person performing those services— (a) Holds an appropriate and current airman certificate; and (b) Is qualified, under this chapter, for the operation for which the person is to be used.
Title 14: Aeronautics and Space
PART 135—OPERATING REQUIREMENTS: COMMUTER AND ON DEMAND OPERATIONS AND RULES GOVERNING PERSONS ON BOARD SUCH AIRCRAFT
Subpart B—Flight Operations
§ 135.95 Airmen: Limitations on use of services.