Article 123 of the Constitution empowers the President to promulgate ordinances during the recess of Parliament.
These ordinances have the same force and effect as an act of Parliament, but are in the nature of temporary laws.
The ordinance-making power is the most important legislative power of the President. It has been vested in him to deal with unforeseen or urgent matters.
The President can promulgate an ordinance only when both the Houses of Parliament are not in session or when either of the two Houses of Parliament is not in session.
An ordinance can be issued only on those subjects on which the Parliament can make laws.
An ordinance cannot abridge or take away any of the fundamental rights.
Every ordinance issued by the President during the recess of Parliament must be laid before both the Houses of Parliament when it reassembles. If the ordinance is approved by both the Houses, it becomes an act.
If Parliament takes no action at all, the ordinance ceases to operate on the expiry of six weeks from the reassembly of Parliament. The ordinance may also cease to operate even earlier than the prescribed six weeks, if both the Houses of Parliament pass resolutions disapproving it.
The maximum life of an ordinance can be six months and six weeks, in case of non-approval by the Parliament (six months being the maximum gap between the two sessions of Parliament).
If an ordinance is allowed to lapse without being placed before Parliament, then the acts done and completed under it, before it ceases to operate, remain fully valid and effective.
The President can also withdraw an ordinance at any time.
The President can promulgate or withdraw an ordinance only on the advice of the council of ministers headed by the prime minister.
An ordinance like any other legislation, can be retrospective, that is, it may come into force from a back date.
An ordinance may modify or repeal any act of Parliament or another ordinance.
An ordinance can alter or amend a tax law also.
An ordinance cannot be issued to amend the Constitution.
The President can issue an ordinance even when there is no war or external aggression or armed rebellion.