Wash. Admin. Code § 220-301-020
Statutory Authority: RCW 77.04.020, 77.12.045, and 77.12.047. 11-14-003 (Order 11-91), § 220-22-020, filed 6/22/11, effective 7/23/11. Statutory Authority: RCW 75.08.080. 90-03-068 (Order 90-05), § 220-22-020, filed 1/19/90, effective 2/19/90; 84-15-008 (Order 84-66), § 220-22-020, filed 7/6/84; 82-13-048 (Order 82-63), § 220-22-020, filed 6/11/82; 81-13-005 (Order 81-37), § 220-22-020, filed 6/8/81; 80-09-072 (Order 80-69), § 220-22-020, filed 7/18/80; 78-07-067 (Order 78-45), § 220-22-020, filed 6/30/78; Order 77-71, § 220-22-020, filed 8/18/77; Order 77-14, § 220-22-020, filed 4/15/77; Order 76-35, § 220-22-020, filed 5/11/76.