Where a party to any proceeding in the Court intends to contend that--
(a) the Court should exercise jurisdiction pursuant to any provision of a subject Act or any law of the Commonwealth or a State relating to cross-vesting of jurisdiction, or
(b) that the Court should transfer the proceeding to another Court pursuant to any such provision or law,the party shall, on or as soon as practicable after commencement of the proceedings, apply to the Court for a determination of the question whether or not the proceeding should be transferred to another Court.