(1) The Central Government may, by notification, add to or alter or amend the First Schedule or the Second Schedule or the Third Schedule and on any such notification being issued, the First Schedule or the Second Schedule or the Third Schedule, as the case may be, shall be deemed to be amended accordingly.
(2) Every notification issued by the Central Government under sub-section (1) shall be laid as soon as may be after it is made before each House of Parliament while it is in session for a total period of thirty days which may be comprised in one session or in two or more successive sessions, and if, before the expiry of the session immediately following the session or the successive sessions aforesaid, both Houses agree in making any modification in the notification, or both Houses agree that the modification should not be made, the notification shall thereafter have effect only in such modified form or be of no effect, as the case may be; so, however, that any such modification or annulment shall be without prejudice to the validity of anything previously done in pursuance of that notification.