Cal. Fam. Code § 17412

(a) Notwithstanding any other law, an action for child support may be brought by the local child support agency on behalf of a minor child or caretaker parent based upon a voluntary declaration of paternity as provided in Chapter 3 (commencing with Section 7570) of Part 2 of Division 12.

(b) Except as provided in Sections 7576 and 7577, the voluntary declaration of paternity shall be given the same force and effect as a judgment for paternity entered by a court of competent jurisdiction. The court shall make appropriate orders for support of the minor child based upon the voluntary declaration of paternity unless evidence is presented that the voluntary declaration of paternity has been rescinded by the parties or set aside by a court as provided in Section 7575.