Wash. Admin. Code § 200-200-290
(1) The fees for rental parking shall be set by the director.
(2) In determining whether to adjust rental parking fees, the director will consider one or more of the following factors:
[Statutory Authority: RCW 43.19.011, 43.19.620, 43.19.985, 43.19.742, 43.19.769, 39.26.080, 39.26.090, 39.26.251, 39.26.255, and 39.26.271. WSR 15-23-062, § 200-200-290, filed 11/13/15, effective 12/14/15. Statutory Authority: 2011 c 43. WSR 11-23-093, recodified as § 200-200-290, filed 11/17/11, effective 11/17/11. Statutory Authority: RCW 43.19.011 (2)(d), 46.08.150, 46.08.172. WSR 07-19-074, § 236-12-290, filed 9/17/07, effective 10/18/07; WSR 04-18-064, § 236-12-290, filed 8/30/04, effective 7/1/05. Statutory Authority: RCW 46.08.150 and 46.08.172. WSR 92-04-037, § 236-12-290, filed 1/30/92, effective 3/1/92. Statutory Authority: RCW 46.08.150. WSR 85-19-001 (Order 85-02), § 236-12-290, filed 9/5/85; WSR 78-05-006 (Order 78-3), § 236-12-290, filed 4/7/78; Order 12, § 236-12-290, filed 12/19/73; Order 11, § 236-12-290, filed 5/22/72; Order 9, § 236-12-290, filed 8/14/70; § 24, filed 8/19/64.]