Pennsylvania Statutes Title 23 Pa.C.S.A. Domestic Relations § 5422. Exclusive, continuing jurisdiction

(a) General rule.--Except as otherwise provided in section 5424 (relating to temporary emergency jurisdiction), a court of this Commonwealth which has made a child custody determination consistent with section 5421 (relating to initial child custody jurisdiction) or 5423 (relating to jurisdiction to modify determination) has exclusive, continuing jurisdiction over the determination until:

(b) Modification where court does not have exclusive, continuing jurisdiction.--A court of this Commonwealth which has made a child custody determination and does not have exclusive, continuing jurisdiction under this section may modify that determination only if it has jurisdiction to make an initial determination under section 5421.