National emergency is declared by the President under the provisions of article 352 of the Constitution. It is declared on grounds of war, external aggression or armed rebellion. Earlier, even internal disturbances served as grounds for such declaration and this was used during the 1975 National Emergency. It brings in major changes to the centre- state relations and suspends enforcement of fundamental rights. Recently, the Supreme Court agreed to look into the constitutionality of 1975 National Emergency.