Wash. Admin. Code § 458-20-187
Statutory Authority: RCW 82.32.300. 86-18-022 (Order ET 86-15), § 458-20-187, filed 8/26/86. Statutory Authority: RCW 82.01.060(2) and 82.32.300. 78-07-045 (Order ET 78-4), § 458-20-187, filed 6/27/78; Order ET 73-1, § 458-20-187, filed 11/2/73; Order ET 71-1, § 458-20-187, filed 7/22/71; Order ET 70-3, § 458-20-187 (Rule 187), filed 5/29/70, effective 7/1/70.