Witnesses summoned before the board shall be paid by the party at whose instance they appear the same fees and mileage that are paid to witnesses in the superior courts of the state of Washington: EXCEPT, if the witness works for the agency and is on duty at the time he or she appears as a witness on behalf of the agency.
Wash. Admin. Code § 446-08-180
Order II, § 446-08-180, filed 11/22/74.