Explanation:

National Emergency(Aniele352): If the president of the state is not satisfied with a grave emergency exists whereby the security of India or any part is threatened whether by war or external aggression gran armed rebellion, then he may proclaim a state of national emergency for the whole of India or a part of India. Such a proclamation of emergency may be revoked by the president subsequently. The proclamation of emergency made under article 352 may be subjected to the judicial review and its constitutionally can be questioned in a court of law on the grounds of malalide. The proclamation made must be approved by both the houses of parliament within one month after the proclamation. The effect of the proclamation of emergency is the emergence of the full-fledged Unitary Govanment.