Wash. Admin. Code § 480-30-436
(1) The commission encourages auto transportation companies to explore innovative rates and rate structures including special or promotional fares intended to:
(2) When an auto transportation company files a special or promotional fare, the filing must at a minimum include the following:
[Statutory Authority: RCW 80.01.040, 81.04.160, 81.12.050, 81.68.030, and 81.70.270. WSR 06-13-006 (General Order No. R-533, Docket No. TC-020497), § 480-30-436, filed 6/8/06, effective 7/9/06.]