Wash. Admin. Code § 220-72-089
Statutory Authority: RCW 77.12.047. 06-01-015 (Order 05-272), § 220-72-089, filed 12/9/05, effective 1/9/06; 05-01-113 (Order 04-318), § 220-72-089, filed 12/15/04, effective 1/15/05; 03-10-041 (Order 03-86), § 220-72-089, filed 4/30/03, effective 5/31/03.