California Code, Family Code - FAM § 7573.5

(1) A person other than the woman who gave birth to the child or a person seeking to establish parentage through a voluntary declaration of parentage is a presumed parent under Section 7540 or subdivision (a), (b), or (c) of Section 7611.

(2) A court has entered a judgment of parentage of the child.

(3) Another person has signed a valid voluntary declaration of parentage.

(4) The child has a parent under Section 7613 or 7962 other than the signatories.

(5) The person seeking to establish parentage is a sperm or ova donor under subdivision (b) or (c) of Section 7613.

(6) The person seeking to establish parentage asserts that the person is a parent under Section 7613 and the child was not conceived through assisted reproduction.