(1) Except as otherwise provided in subsection (2) of this section, an individual who, at the time of a child's birth, is the spouse of the woman who gave birth to the child by assisted reproduction may not challenge the individual's parentage of the child unless:
(a) Not later than four years after the birth of the child, the individual commences a proceeding to adjudicate the individual's parentage of the child; and
(b) The court finds the individual did not consent to the assisted reproduction, before, on, or after birth of the child, or withdrew consent under RCW 26.26A.630.
(2) A proceeding to adjudicate a spouse's parentage of a child born by assisted reproduction may be commenced at any time if the court determines:
(a) The spouse neither provided a gamete for, nor consented to, the assisted reproduction;
(b) The spouse and the woman who gave birth to the child have not cohabited since the probable time of assisted reproduction; and
(c) The spouse never openly held out the child as the spouse's child.
(3) This section applies to a spouse's dispute of parentage even if the spouse's marriage is declared invalid after assisted reproduction occurs.
[ 2018 c 6 § 605.]