Wash. Admin. Code § 220-47-500
Statutory Authority: RCW 77.12.047 and 77.04.020. 09-15-054 (Order 09-108), § 220-47-500, filed 7/9/09, effective 8/9/09. Statutory Authority: RCW 75.08.080. 92-15-105 (Order 92-47), § 220-47-500, filed 7/20/92, effective 8/20/92; 90-13-025 (Order 90-49), § 220-47-500, filed 6/11/90, effective 7/12/90.