51 Pa.C.S. § 4644: Termination by operation of law of custodial responsibility granted by court order.

(a) Absence of filed agreement.--If an agreement to terminate an order for temporary custodial responsibility issued under Subchapter C (relating to judicial procedure for granting custodial responsibility during deployment) has not been filed, the order shall terminate 60 days after the deploying parent gives notice, to the other parent and any nonparent granted custodial responsibility, that the deploying parent has returned from deployment.

(b) Applicable law.--A proceeding seeking to prevent termination of an order for temporary custodial responsibility is governed by law of this Commonwealth other than this chapter.