law: Registration Act, 1908
  5. Districts and sub-districts
  (1) For the purposes of this Act, the State Government shall
  
  form districts and sub-districts, and shall prescribe, and may alter, the
  
  limits of such district and sub-districts.
  (2) The districts and sub-districts formed under this section,
  
  together with the limits thereof, and every alteration of such limits, shall be
  
  notified in the Official Gazette.
  (3) Every such alteration shall take effect on such day after
  
  the date of the notification as is therein mentioned.