14 C.F.R. § 91.1031 Pilot in command or second in command: Designation required.
Title 14 - Aeronautics and Space
(a) Each program manager must designate a— (1) Pilot in command for each program flight; and (2) Second in command for each program flight requiring two pilots. (b) The pilot in command, as designated by the program manager, must remain the pilot in command at all times during that flight.
Title 14: Aeronautics and Space
PART 91—GENERAL OPERATING AND FLIGHT RULES
Subpart K—Fractional Ownership Operations
Program Management
§ 91.1031 Pilot in command or second in command: Designation required.