Wash. Admin. Code § 220-90-015
Statutory Authority: RCW 77.04.012, 77.04.013, 77.04.055, 77.12.045, and 77.12.047. 13-02-043 (Order 12-290), § 220-90-015, filed 12/21/12, effective 1/21/13; Order 76-148, § 220-90-015, filed 12/2/76; Order 1193, § 220-90-015, filed 3/4/75.