law: 64. Disobedience of lawful command of captain of aircraft.-
  Any person subject to this Act who, whatever his rank, commits any of the following offences, that is to say,-
  (a) while he is in an aircraft disobeys any lawful command given by the captain of the aircraft, whether such captain is subject to this Act or not, as respects all matters relating to the flying or handling of the aircraft, or affecting the safety thereof; or
  (b) being the captain of a glider aircraft towed by another aircraft disobeys any lawful command given by the captain of the towing aircraft, whether the latter is subject to this Act or not, as respects all matters aforesaid; shall, on conviction by court-martial, be liable to suffer imprisonment for a term which may extend to fourteen years or such less punishment as is in this Act mentioned.