Wash. Rev. Code § 26.26A.400 : DOMESTIC RELATIONS — Uniform parentage act — Proceeding to Adjudicate Parentage —PROCEEDING TO ADJUDICATE PARENTAGE Nature of Proceeding — Proceeding to adjudicate parentage-Authorization TEXT PDF (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. RCW 26.26A.400 Added by 2018 c 6,§ 501, eff. 1/1/2019.