California Code, Family Code - FAM § 7644

(a) Notwithstanding any other law, an action for child custody and support and for other relief as provided in Section 7637 may be filed based upon a voluntary declaration of parentage as provided in Chapter 3 (commencing with Section 7570) of Part 2.

(b) Except as provided in Section 7581, the voluntary declaration of parentage shall be given the same force and effect as a judgment of parentage entered by a court of competent jurisdiction.  The court shall make appropriate orders as specified in Section 7637 based upon the voluntary declaration of parentage unless evidence is presented that the voluntary declaration of parentage has been rescinded by the parties, set aside as provided in Section 7575, 7576, or 7577, or is void under Section 7573.5.

(c) The Judicial Council shall develop the forms and procedures necessary to implement this section.

(d) This section shall become operative on January 1, 2020.