In addition to RCW 31.04.027, the following constitute an "unfair or deceptive" act or practice:
Wash. Admin. Code § 208-620-550
Statutory Authority: RCW 43.320.040 and 31.04.165. 12-18-047, § 208-620-550, filed 8/29/12, effective 11/1/12. Statutory Authority: RCW 43.320.040, 31.04.165 and 2010 c 35. 10-20-122, § 208-620-550, filed 10/5/10, effective 11/5/10. Statutory Authority: RCW 43.320.040, 31.04.165, 2009 c 120, and 2009 c 149. 09-24-090, § 208-620-550, filed 12/1/09, effective 1/1/10. Statutory Authority: RCW 43.320.040. 08-15-125, § 208-620-550, filed 7/22/08, effective 8/22/08. Statutory Authority: RCW 31.04.165, 31.04.015, 31.04.045, 31.04.075, 31.04.085, 31.04.093, 31.04.102, 31.04.115, 31.04.145, 31.04.155, and 31.04.175. 06-04-053, § 208-620-550, filed 1/27/06, effective 2/27/06.