Wash. Admin. Code § 458-20-224
Statutory Authority: RCW 82.32.300. 86-18-069 (Order 86-16), § 458-20-224, filed 9/3/86; 83-17-099 (Order ET 83-6), § 458-20-224, filed 8/23/83; 83-07-032 (Order ET 83-15), § 458-20-224, filed 3/15/83; Order ET 70-3, § 458-20-224 (Rule 224), filed 5/29/70, effective 7/1/70.