91.203 Authority of the pilot-in-command

• Each pilot-in-command of an aircraft shall give any commands necessary for the safety of the aircraft and of persons and property carried on the aircraft, including disembarking or refusing the carriage of--
  • (1) any person who appears to be under the influence of alcohol or any drug where, in the opinion of the pilot-in-command, their carriage is likely to endanger the aircraft or its occupants; and
  • (2) any person, or any part of the cargo, which, in the opinion of the pilot-in-command, is likely to endanger the aircraft or its occupants.