2005 California Family Code Sections 4965 Article 7. Determination of Parentage

4965.  (a) A tribunal of this state may serve as an initiating or
responding tribunal in a proceeding brought under this chapter or a
law or procedure substantially similar to this chapter, the Uniform
Reciprocal Enforcement of Support Act, or the Revised Uniform
Reciprocal Enforcement of Support Act to determine that the
petitioner is a parent of a particular child or to determine that a
respondent is a parent of that child.
   (b) In a proceeding to determine parentage, a responding tribunal
of this state shall apply the Uniform Parentage Act (Part 3
(commencing with Section 7600) of Division 12), procedural and
substantive law of this state, and the rules of this state on choice
of law.