CALIFORNIA FAMILY LAW
...Interstate Custody/UCCJA
......Jurisdiction: Concurrent
.........Resolution of Concurrent Juris.
............Valid Prior Order
2 Cards On This Topic:

UCCJA and PKPA both preempt Cal. on issue of jurisdiction to render custody decree where valid prior order issued by state having jurisdiction under UCCJA.

A state may not modify custody order of another state which continues to have jurisdiction, even if the state may have had jurisdiction if it were an initial proceeding.