These rules are promulgated under RCW 43.21C.120 (the State Environmental Policy Act) and chapter 197-11 WAC (SEPA rules).
Wash. Admin. Code § 344-18-010
Statutory Authority: RCW 43.21C.120. 85-03-016 (Order 5, Resolution No. 9), § 344-18-010, filed 1/7/85.