Wash. Admin. Code § 480-90-123
Statutory Authority: RCW 80.01.040 and 80.04.160. 03-24-028 (General Order R-510, Docket No. A-010648), § 480-90-123, filed 11/24/03, effective 1/1/04; 01-24-077 (General Order No. R-496, Docket No. UG-990294), § 480-90-123, filed 12/3/01, effective 1/3/02.