23 Pa.C.S. § 5446: Enforcement of registered determination.

(a) General rule.--A court of this Commonwealth may grant any relief normally available under the laws of this Commonwealth to enforce a registered child custody determination made by a court of another state.

(b) Modification.--A court of this Commonwealth shall recognize and enforce but may not modify, except in accordance with Subchapter B (relating to jurisdiction), a registered child custody determination of a court of another state.