WAC 478-121-415
WAC 478-121-415. Communications with hearing officer
All communications with the hearing officer, except for communications necessary to procedural aspects of maintaining an orderly process, must be in the presence of, or with a copy to, all other parties. Ex parte communications received by the hearing officer must be placed on the record, and all other parties must be informed of the ex parte communication and given an opportunity to respond on the record.