until October 24, 1991. The question becomes whether valid timely service was completed by mail in this manner.
Other court rules supply the answer. Pursuant to MAR, 1.3(b)(1), the rules of civil procedure apply before a case is assigned to an arbitrator, and the arbitration rules apply thereafter "except where an arbitration rule states that a civil rule applies." MAR 1.3(b)(2) is the arbitration rule on the subject of service. It provides:
Service. After a case is assigned to an arbitrator, all pleadings and other papers shall be served in accordance with CR 5 and filed with the arbitrator.
CR 5(b)(2)(A), in turn, is the civil rule governing service by mail. It provides:
(A) How made. If service is made by mail, the papers shall be deposited in the post office addressed to the person on whom they are being served, with the postage prepaid. The service shall be deemed complete upon the third day following the day upon which they are placed in the mail, unless the third day falls on a Saturday, Sunday, or legal holiday....
(Italics ours.) Under CR 5(b)(2)(A), there is a presumption that service by mail of papers, other than service of original process, is not complete until the third day following the date of mailing. Jones v. Stebbins, 122 Wn.2d 471, 860 P.2d 1009 (1993). In this case, therefore, service by mail could not be "deemed complete" until the third day following October 22, 1991.
Lynn argues that the trial court's interpretation of MAR 7.1(a) to require completed service within 20 days after the arbitration award puts the rule in conflict with the arbitration statutes and unduly abridges the right to trial de novo. RCW 7.06.050 codifies that right by stating that
[wjithin twenty days after such filing, any aggrieved party may file with the clerk a written notice of appeal and request for a trial de novo in the superior court on all issues of law and fact. Such trial de novo shall thereupon be held, including a right to jury, if demanded.
This statute does not mention service of process. The court rule does not, however, abridge the statutory right to trial de novo. Any party initiating a procedural step must serve the