Wash. Admin. Code § 220-413-020
Statutory Authority: RCW 77.12.047. 07-17-064, § 232-12-061, filed 8/13/07, effective 9/13/07. Statutory Authority: RCW 77.12.040. 97-18-020 (Order 97-168), § 232-12-061, filed 8/25/97, effective 9/25/97; 81-22-002 (Order 174), § 232-12-061, filed 10/22/81; 81-12-029 (Order 165), § 232-12-061, filed 6/1/81. Formerly WAC 232-12-160.