Powers of Councillors whose term is further extended and validation of certain acts

All Councillors, whose term of office is deemed to have been extended, or is further extended, under section 2, shall, throughout the further extended period also, be deemed to have been and be competent to exercise all powers, perform all duties and discharge all functions as such Councillors, and no act done by any of them, or shall be called in question in any Court, merely on the ground that the term of office was not extended in time or was not otherwise duly extended, or that during the extended period the Municipal Corporation or any of the authorities or other bodies thereof or any of the Councillors could not exercise all or any of the powers or perform all or any of the duties or discharge all or any of the functions of the Corporation, authority, body or Councillor, as the case may be.