In all appeals, upon request of one or more parties and with the consent of all parties, the board may assign a mediator. The mediator must be an administrative appeals judge or other duly authorized agent of the board who has received training in dispute resolution techniques or has a demonstrated history of successfully resolving disputes, as determined by the board. A person who mediates in a particular appeal may not participate in a hearing on that appeal and may not write the decision and order in the appeal. The mediator may not communicate with board members regarding the mediation other than to inform them of the pendency of the mediation and whether the case settled. Mediation provided by the board must be conducted pursuant to the provisions of the Uniform Mediation Act, chapter 7.07 RCW.