If a party requests under the laws of this Commonwealth other than this subchapter modification of an award confirmed under section 7386 (relating to confirmation of award) or of a judgment on an award, based on a fact occurring after confirmation:
(1) the parties shall proceed under the dispute-resolution method specified in the award or judgment; or
(2) if the award or judgment does not specify a dispute-resolution method, the parties may:
(i) agree to arbitrate the modification before the original arbitrator or another arbitrator; or
(ii) absent agreement proceedings under 23 Pa.C.S. (relating to domestic relations) and the applicable Pennsylvania Rules of Civil Procedure.