When a support action that has been initiated in another county or another state is filed, transferred, or registered in a superior court of this state under the Uniform Interstate Family Support Act (Fam. Code, div. 9, pt. 5, ch. 6, commencing with Section 4900 ) , the intercounty support enforcement provisions of the Family Code (div. 9, pt. 5, ch. 8, art. 9, commencing with Section 5600 ) , or any similar law, the party designations in the caption of the action in the responding court must be as follows:
The party designation in the superior court of this state, responding to new actions initiated under the Uniform Interstate Family Support Act (Fam. Code, div. 9, pt. 5, ch. 6, commencing with Section 4900 ) , must be the party designation that appears on the first page of the Uniform Support Petition (form FL-500/OMB 0970-0085 ) in the action.
The party designation in all support actions registered for enforcement or modification must be the one that appears in the original (earliest) order being registered.
Cal. R. Ct. 5.370