The Registration Act,1908
Section 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 districts and sub-districts,
(2) The districts and sub-districts formed under this section, together with the limits thereof, and every alternation of such limits, shall be notified in the Official Gazette.
(3) Every such alternation shall take effect on such day after the date of the notification as is therein mentioned.