Wash. Admin. Code § 296-54-541
Statutory Authority: RCW 49.17.010, [49.17].040 and[49.17].050 . 99-17-117, § 296-54-541, filed 8/18/99, effective 12/1/99. Statutory Authority: RCW 49.17.040, 49.17.150 and 49.17.240. 79-10-081 (Order 79-14), § 296-54-541, filed 9/21/79.