law: Employee's Provident Funds Miscellaneous Provisions Act, 1952
  7. Modification of Scheme
  (1) The Central Government may, by
  
  notification in the Official Gazette, add to, [amend or vary, either
  
  prospectively or retrospectively, the Scheme, the [Pension] Scheme or the
  
  Insurance Scheme, as the case may be.]
  [(2) Every notification issued under
  
  sub-section (1) shall be laid, as soon as may be after it is issued, 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 notification
  
  should not be issued, 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 under that notification.]