Section 26.26A.400 - Proceeding to adjudicate parentage-Authorization(1) A proceeding may be commenced to adjudicate the parentage of a child. Except as otherwise provided in this chapter, the proceeding is governed by the rules of civil procedure.(2) A proceeding to adjudicate the parentage of a child born under a surrogacy agreement is governed by RCW 26.26A.700 through 26.26A.785.Added by 2018 c 6,§ 501, eff. 1/1/2019.