(a) Except as provided in Chapter 1 (commencing with Section 7540) and Chapter 3 (commencing with Section 7570) of Part 2 or in Section 20102, a presumption under Section 7611 is a rebuttable presumption affecting the burden of proof and may be rebutted in an appropriate action only by clear and convincing evidence.
(b) If two or more presumptions arise under Section 7610 or 7611 that conflict with each other, or if a presumption under Section 7611 conflicts with a claim pursuant to Section 7610, the presumption which on the facts is founded on the weightier considerations of policy and logic controls.
(c) In an appropriate
action, a court may find that more than two persons with a claim to parentage under this division are parents if the court finds that recognizing only two parents would be detrimental to the child. In determining detriment to the child, the court shall consider all relevant factors, including, but not limited to, the harm of removing the child from a stable placement with a parent who has fulfilled the child’s physical needs and the child’s psychological needs for care and affection, and who has assumed that role for a substantial period of time. A finding of detriment to the child does not require a finding of unfitness of any of the parents or persons with a claim to parentage.
(d) Unless a court orders otherwise after making the determination specified in subdivision (c), a presumption under Section 7611 is rebutted by a judgment
establishing parentage of the child by another person.
(e) Within two years of the execution of a voluntary declaration of paternity, a person who is presumed to be a parent under Section 7611 may file a petition pursuant to Section 7630 to set aside a voluntary declaration of paternity. The court’s ruling on the petition to set aside the voluntary declaration of paternity shall be made taking into account the validity of the voluntary declaration of paternity, and the best interests of the child based upon the court’s consideration of the factors set forth in subdivision (b) of Section 7575, as well as the best interests of the child based upon the nature, duration, and quality of the petitioning party’s relationship with the child and the benefit or detriment to the child of continuing that relationship. In the event of any conflict between the presumption
under Section 7611 and the voluntary declaration of paternity, the weightier considerations of policy and logic shall control.
(f) A voluntary declaration of paternity is invalid if, at the time the declaration was signed, any of the following conditions exist:
(1) The child already had a presumed parent under Section 7540.
(2) The child already had a presumed parent under subdivision (a), (b), or (c) of Section 7611.
(3) The man signing the declaration is a sperm donor, consistent with subdivision (b) of Section 7613.
(g) A person’s offer or refusal to sign a voluntary declaration of paternity may be
considered as a factor, but shall not be determinative, as to the issue of legal parentage in any proceedings regarding the establishment or termination of parental rights.