The Central Government, as respects the Union territory of Mizoram or Arunachal Pradesh and the State Government as respects any new State established or formed by the provisions of Part II may, by notification in the Official Gazette, specify the authority, officer or person who, as from the appointed day, shall be competent to exercise such functions exercisable under any law in force on that day as may be mentioned in that notification and such law shall have effect accordingly.