2023 Washington Code 19.355.020 – Prohibited practices — Requirements

2022 Washington Code 19.355.020 – Prohibited practices–Requirements

2020 Washington Code 19.355.020 – Prohibited practices — Requirements

2019 Washington Code 19.355.020 – Prohibited practices — Requirements

2018 Washington Code 19.355.020 – Prohibited practices — Requirements

2016 Washington Code 19.355.020 – Prohibited practices–Requirements