CA Fam Code Section 3443

(a)

A court of this state shall recognize and enforce a child custody determination of a court of another state if the latter court exercised jurisdiction in substantial conformity with this part or the determination was made under factual circumstances meeting the jurisdictional standards of this part and the determination has not been modified in accordance with this part.

(b)

A court of this state may utilize any remedy available under other laws of this state to enforce a child custody determination made by a court of another state. The remedies provided in this chapter are cumulative and do not affect the availability of other remedies to enforce a child custody determination.