The President of India is vested with ordinance making power by Article 126, He exercises this power:

when Lok Sabha is not in session and circumstances .exist which render it necessary for the President to take immediate action

when Council of States is not in session and the President is satisfied that circumstances exist which render it necessary for him to take immediate action

when both Houses of Parliament are not in session and President is satisfied that circumstances exist which made it necessary for him to take the immediate action

in all the above circumstances