Uniform Code of Military Justice
Article 223. Lawful Orders.
(a) No person has a duty under this Code to obey an unlawful order.
(b) An order is unlawful when it—
(i) directs commission of an offense;
(ii) requires conduct beyond the lawful authority of the issuing official; or
(iii) requires conduct prohibited by controlling law.
(c) Disagreement with the wisdom, necessity, policy, or tactical judgment underlying an otherwise lawful order does not render the order unlawful.
(d) The legality of an order is a question of law for the military court.