Wash. Admin. Code § 357-16-215
In accordance with RCW 49.58.100, an employer may not:
(2) Require that an individual's prior wage or salary history meet certain criteria, except as provided in WAC 357-16-220.
For the purposes of this section "employer" also includes those employers with fewer than fifteen employees.
[Statutory Authority: Chapter 41.06 RCW, RCW 49.58.100 and 49.58.110. WSR 20-06-009, § 357-16-215, filed 2/20/20, effective 3/30/20.]