Wash. Admin. Code § 284-19-050
Statutory Authority: RCW 48.02.060. 06-15-030 (Matter No. R 2006-03), § 284-19-050, filed 7/10/06, effective 8/10/06; 98-13-095 (Matter No. R 98-10), § 284-19-050, filed 6/16/98, effective 7/17/98; Order R-73-2, § 284-19-050, filed 3/30/73; Order R-70-1, § 284-19-050, filed 7/31/70; Order R-69-1, § 284-19-050, filed 1/28/69.