Wash. Admin. Code § 284-50-020
Statutory Authority: RCW 48.02.060(3)(a) and 48.17.010(5). 11-01-159 (Matter No. R 2010-09), § 284-50-020, filed 12/22/10, effective 1/22/11; Order R-76-2, § 284-50-020, filed 3/4/76; Order R-73-1, § 284-50-020, filed 2/28/73, effective 4/1/73.