On June 25, 1975, the President declared National Emergency, on the Prime Minister's recommendation, due to a perceived internal threat. 

• Before this, two National Emergency were also proclaimed due to war with China in 1962 and war with Pakistan in 1971.

Current Constitutional provisions on National Emergency 

• Proclamation: Could be proclaimed by the President on written request of Union Cabinet (Article 352).
• Grounds: Security of India or any part of it is threatened due to war, external aggression or armed rebellion. 
• Parliamentary approval: Proclamations must be approved by both the Houses of Parliament within one month. 
• Duration:  6 months since the proclamation which can be extended for another six months (for any number of times) through a resolution passed by both Houses of Parliament.
• Revocation: By President
• Impact 
  • Suspension of Fundamental Rights (FR):
    • State can Suspend Article 19 if the National Emergency is proclaimed due to war or external aggression. 
    • President can suspend the right to move any court for the enforcement FRs except for Article 20 and Article 21.
  • Centralisation of Power 
    • Legislative: Parliament can make laws for any matter including those in the State List of the Constitution.
    • Executive: Union Government can give direction to the states on the way it should exercise executive power (Art. 353).
    • Distribution of revenues:  President can modify provisions of Articles 268 to 279 (related to allocation of financial resources between Union and States). Modification may last till fiscal year in which such Proclamation ends.