2010 Pennsylvania Code
Title 23 - DOMESTIC RELATIONS
Chapter 54 - Uniform Child Custody Jurisdiction and Enforcement
5447 - Simultaneous proceedings.

     § 5447.  Simultaneous proceedings.
        If a proceeding for enforcement under this subchapter is
     commenced in a court of this Commonwealth and the court
     determines that a proceeding to modify the determination is
     pending in a court of another state having jurisdiction to
     modify the determination under Subchapter B (relating to
     jurisdiction), the enforcing court shall immediately communicate
     with the modifying court. The proceeding for enforcement
     continues unless the enforcing court, after consultation with
     the modifying court, stays or dismisses the proceeding.