2023 Washington Code 21.20.530 – Interpretative opinions by director

2022 Washington Code 21.20.530 – Interpretative opinions by director

2020 Washington Code 21.20.530 – Interpretative opinions by director

2019 Washington Code 21.20.530 – Interpretative opinions by director

2018 Washington Code 21.20.530 – Interpretative opinions by director

2016 Washington Code 21.20.530 – Interpretative opinions by director

2015 Washington Code 21.20.530 – Interpretative opinions by director

2014 Washington Code 21.20.530 – Interpretative opinions by director

2013 Washington Code 21.20.530 – Interpretative opinions by director

2009 Washington Code 21.20.530 – Interpretative opinions by director