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. If the Houses of Parliament are summoned to reassemble on different dates, the period of six weeks is calculated from the later of those dates.

This means that 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.

Sources: Laxmikanth