2023 Washington Code 18.160.901 – Effective date — 1990 c 177

2022 Washington Code 18.160.901 – Effective date–1990 c 177

2020 Washington Code 18.160.901 – Effective date — 1990 c 177

2019 Washington Code 18.160.901 – Effective date — 1990 c 177

2018 Washington Code 18.160.901 – Effective date — 1990 c 177

2016 Washington Code 18.160.901 – Effective date–1990 c 177

2015 Washington Code 18.160.901 – Effective date–1990 c 177

2014 Washington Code 18.160.901 – Effective date — 1990 c 177

2013 Washington Code 18.160.901 – Effective date — 1990 c 177

2009 Washington Code 18.160.901 – Effective date — 1990 c 177