A claim by a person in proceedings before a tribunal performing an investigative function that certain evidence is subject to public interest immunity is not precluded or affected by:
(a) the fact that a court has given leave or made an order under Division 4 of Part 4 or Division 2 of Part 5; or
(b) the disclosure of any evidence or matter in the course of proceedings for the giving of such leave or the making of such an order.