Wash. Admin. Code § 220-56-156
Statutory Authority: RCW 77.12.047 and 77.04.020. 08-15-090 (Order 08-172), § 220-56-156, filed 7/17/08, effective 8/17/08. Statutory Authority: RCW 77.12.047. 06-05-085 (Order 06-23), § 220-56-156, filed 2/14/06, effective 5/1/06; 05-05-046 (Order 05-22), § 220-56-156, filed 2/14/05, effective 3/17/05. Statutory Authority: RCW 75.08.080. 92-11-012 (Order 92-19), § 220-56-156, filed 5/12/92, effective 6/12/92; 90-08-001 (Order 90-22), § 220-56-156, filed 3/22/90, effective 4/22/90; 85-09-017 (Order 85-20), § 220-56-156, filed 4/9/85.