Wash. Admin. Code § 192-220-060
(1) The department will send you and all interested employers information about the overpayment assessment and the right to appeal any of the following elements of the assessment:
(2) As used in this chapter, an interested employer is:
[Statutory Authority: RCW 50.12.010 and 50.12.040. WSR 16-21-013, § 192-220-060, filed 10/7/16, effective 11/14/16. Statutory Authority: RCW 50.12.010, 50.12.040, and 50.20.010. WSR 07-23-128, § 192-220-060, filed 11/21/07, effective 1/1/08.]