Wash. Admin. Code § 220-356-100
Statutory Authority: RCW 75.08.080. 98-05-043, § 220-49-017, filed 2/11/98, effective 3/14/98; 94-12-009 (Order 94-23), § 220-49-017, filed 5/19/94, effective 6/19/94; 89-14-010 (Order 89-48), § 220-49-017, filed 6/22/89; Order 1105, § 220-49-017, filed 12/28/73.