Wash. Admin. Code § 220-301-010
Statutory Authority: RCW 77.12.047. 07-09-055 (Order 07-60), § 220-22-010, filed 4/12/07, effective 5/13/07. Statutory Authority: RCW 75.08.080. 79-07-045 (Order 79-42), § 220-22-010, filed 6/22/79; Order 77-14, § 220-22-010, filed 4/15/77; Order 76-35, § 220-22-010, filed 5/11/76.