All laws in force in the acquired territories immediately before the appointed day shall, as from that day, cease to be in force in those territories and all laws in force generally in the State concerned in which the acquired territories are included shall, as from that day, extend to, or as the case may be, come into force in, those territories:
     Provided that anything done or any action taken before the appointed day under any law in force in the acquired territories shall be deemed to have been done or taken, as from the appointed day, under the corresponding law extended to, and in force, in those territories.