For purposes of all rules of the commission, Eastern and Western Washington are defined as:
Eastern Washington - All lands lying east of the Cascade Crest Trail and east of the Big White Salmon River in Klickitat County.
Western Washington - All lands lying west of the Cascade Crest Trail and west of and including the Big White Salmon River in Klickitat County.
[Statutory Authority: RCW
77.04.012,
77.04.013,
77.04.020,
77.04.055, and
77.12.047. WSR 17-05-112 (Order 17-04), recodified as § 220-200-020, filed 2/15/17, effective 3/18/17. Statutory Authority: RCW
77.12.040. WSR 86-09-024 (Order 271), § 232-12-809, filed 4/10/86; WSR 82-11-099 (Order 184), § 232-12-809, filed 5/19/82.]