Wash. Rev. Code § 2.24.050
All of the acts and proceedings of court commissioners hereunder shall be subject to revision by the superior court. Any party in interest may have such revision upon demand made by written motion, filed with the clerk of the superior court, within ten days after the entry of any order or judgment of the court commissioner. Such revision shall be upon the records of the case, and the findings of fact and conclusions of law entered by the court commissioner, and unless a demand for revision is made within ten days from the entry of the order or judgment of the court commissioner, the orders and judgments shall be and become the orders and judgments of the superior court, and appellate review thereof may be sought in the same fashion as review of like orders and judgments entered by the judge.
RCW 2.24.050
Severability-1988 c 202: "If any provision of this act or its application to any person or circumstance is held invalid, the remainder of the act or the application of the provision to other persons or circumstances is not affected." [ 1988 c 202 s 97.]