The Constitution does not prescribe the time frame within which the state legislatures should ratify or reject an amendment submitted to them. Also, it is silent on the issue whether the states can withdraw their approval after according the same. 5. There is no provision for holding a joint sitting of both the Houses of Parliament if there is a deadlock over the passage of a constitutional amendment bill. On the other hand, a provision for a joint sitting is made in the case of an ordinary bill.