Wash. Admin. Code § 220-20-021
Statutory Authority: RCW 77.12.047. 07-21-128 (Order 07-266), § 220-20-021, filed 10/23/07, effective 11/23/07; 07-04-030, § 220-20-021, filed 1/29/07, effective 3/1/07; 06-05-094 (Order 06-24), § 220-20-021, filed 2/14/06, effective 3/17/06. Statutory Authority: RCW 75.08.080. 97-07-043 (Order 97-51), § 220-20-021, filed 3/14/97, effective 4/14/97; 94-12-009 (Order 94-23), § 220-20-021, filed 5/19/94, effective 6/19/94; 85-08-023 (Order 85-24), § 220-20-021, filed 4/1/85; 82-17-040 (Order 82-105), § 220-20-021, filed 8/13/82.