Any person subject to sections 40.005 to 40.490 shall be punished as a court-martial may direct who, while in the hands of a hostile force in time of war or civil disturbance:
(1) For the purpose of securing favorable treatment by the person's captors, acts without proper authority in a manner contrary to law, custom, or regulation, to the detriment of others of whatever nationality held by a hostile force as civilian or military prisoners; or
(2) While in a position of authority over such persons maltreats them without justifiable cause.