Subject to the provisions of this Part, the law in force immediately before the appointed day with respect to practice and procedure in the High Court for the corresponding State shall, with the necessary modifications, apply in relation to the High Court for a new State, and accordingly, the High Court for the new State shall have all such powers to make rules and orders with respect to practice and procedure as are, immediately before the appointed day exercisable by the High Court for the corresponding State:
     Provided that any rules or orders which are in force immediately before the appointed day with respect to practice and procedure in the High Court for the corresponding State shall, until varied or revoked by rules or orders made by the High Court for a new State, apply with the necessary modifications in relation to practice and procedure in the High Court for the new State as if made by that Court.