Supermajority requirement for constitutional invalidation: a specified bench and qualified majority are required before laws can be struck down. A minimum of seven Supreme Court judges must sit to determine the constitutional validity of any Central or State law, and a Central or State law shall not be declared constitutionally invalid by the Supreme Court unless a majority of not less than two thirds of the judges sitting for that purpose hold it to be constitutionally invalid; provision came into force with effect from 1 February 1977.