Article 352 of the Indian Constitution deals with:

Art. 352 of the Constitution of India deals with Proclamation of National Emergency. Art. 352. Proclamation of Emergency (1)  If the President is satisfied that a grave emergency exists whereby the security of India or of any part of the territory thereof is threatened, whether by war or external aggression or armed rebellion, he may, by Proclamation, made a declaration to that effect in respect of the whole of India or of such part of the territory thereof as may be specified in the Proclamation Explanation A Proclamation of Emergency declaring that the security of India or any part of the territory thereof is threatened by war or by external aggression or by armed rebellion may be made before the actual occurrence of war or of any such aggression or rebellion, if the President is satisfied that there is imminent danger thereof.