2023 Washington Code 18.20.185 – Complaints — Toll-free telephone number — Investigation and referral — Rules — Retaliation prohibited

2022 Washington Code 18.20.185 – Complaints–Toll-free telephone number–Investigation and referral–Rules–Retaliation prohibited

2020 Washington Code 18.20.185 – Complaints — Toll-free telephone number — Investigation and referral — Rules — Retaliation prohibited

2019 Washington Code 18.20.185 – Complaints — Toll-free telephone number — Investigation and referral — Rules — Retaliation prohibited

2018 Washington Code 18.20.185 – Complaints — Toll-free telephone number — Investigation and referral — Rules — Retaliation prohibited

2016 Washington Code 18.20.185 – Complaints–Toll-free telephone number–Investigation and referral–Rules–Retaliation prohibited

2015 Washington Code 18.20.185 – Complaints–Toll-free telephone number–Investigation and referral–Rules–Retaliation prohibited

2014 Washington Code 18.20.185 – Complaints — Toll-free telephone number — Investigation and referral — Rules — Retaliation prohibited

2013 Washington Code 18.20.185 – Complaints — Toll-free telephone number — Investigation and referral — Rules — Retaliation prohibited

2009 Washington Code 18.20.185 – Complaints — Toll-free telephone number — Investigation and referral — Rules — Retaliation prohibited