Army Act :
16. Establishment of Military Law. —Martial Law means the suppression of the civil authority, by military authority, whose sole object is to restore conditions, as expeditiously as possible, to enable the civil authority to resume charge. By imposing Martial Law a military commander assumes the appointment of Martial Law Administrator and takes control of the affected area. He may, however, require the civil authorities to discharge their normal functions under such conditions as may be prescribed by him. Being an extreme step, the decision to declare Martial Law has to be taken at the highest level possible. Before imposing Martial Law, as far as practicable, the military commander should obtain the approval of the Central Government. Where the situation is grave, and the circumstances are such that it is not possible to obtain the prior approval, of the Central Government the military commander may, on his own, assume supreme authority for the maintenance of law and order. He should, however, inform the Central Government as soon as possible after Martial Law is proclaimed. He -should also issue proclamation for the information of the inhabitants that Martial Law has been declared.