(1) A person initiates an arbitration proceeding by giving notice in a record to the other parties to the agreement to arbitrate in the agreed manner between the parties or, in the absence of agreement, by mail certified or registered, return receipt requested and obtained, or by service as authorized for the initiation of a civil action. The notice must describe the nature of the controversy and the remedy sought.

     (2) Unless a person interposes an objection as to lack or insufficiency of notice under RCW 7.04A.150(3) not later than the commencement of the arbitration hearing, the person's appearance at the hearing waives any objection to lack of or insufficiency of notice.

[2005 c 433 § 9.]