Wash. Admin. Code § 504-28-020
Statutory Authority: RCW 28B.30.150. 09-11-070, § 504-28-020, filed 5/14/09, effective 6/14/09. Statutory Authority: RCW 28B.30.150, 28B.30.095 and 28B.30.125. 95-07-046, § 504-28-020, filed 3/8/95, effective 4/8/95. Statutory Authority: RCW 28B.30.095, 28B.30.125, 28B.30.150 and chapter 28B.19 RCW. 87-12-013 (Order 87-1), § 504-28-020, filed 5/26/87. Statutory Authority: RCW 28B.30.125 and 28B.30.150. 80-07-015 (Order 80-2, Resolution No. 6/80-15), § 504-28-020, filed 6/11/80; Order 77-2, § 504-28-020, filed 8/3/77; Order 5, § 504-28-020, filed 9/26/72; Order 3, § 504-28-020, filed 8/5/71.