Wash. Admin. Code § 220-352-220
Statutory Authority: RCW 75.08.080. 00-01-145 (Order 99-221), § 220-69-271, filed 12/20/99, effective 1/20/00; 80-05-093 (Order 80-27), § 220-69-271, filed 5/2/80; 78-03-031 (Order 78-7), § 220-69-271, filed 2/17/78; Order 76-153, § 220-69-271, filed 12/17/76.