Wash. Admin. Code § 390-18-020
[Statutory Authority: RCW 42.17A.110 and 2024 c 164. WSR 26-01-209, s 390-18-020, filed 12/24/25, effective 1/1/26. Statutory Authority: RCW 42.17A.110(1) and 2018 c 304. WSR 18-24-074, § 390-18-020, filed 11/30/18, effective 12/31/18. Statutory Authority: RCW 42.17A.110. WSR 12-03-002, § 390-18-020, filed 1/4/12, effective 2/4/12. Statutory Authority: RCW 42.17.370 and 42.17.562. WSR 06-11-132, § 390-18-020, filed 5/23/06, effective 6/23/06. Statutory Authority: RCW 42.17.370(1). WSR 99-12-067, § 390-18-020, filed 5/27/99, effective 6/27/99. Statutory Authority: RCW 42.17.370. WSR 93-16-064, § 390-18-020, filed 7/30/93, effective 8/30/93. Statutory Authority: RCW 42.17.370(1). WSR 85-15-020 (Order 85-03), § 390-18-020, filed 7/9/85.]