2023 Washington Code 81.12.050 – Rules and regulations

2022 Washington Code 81.12.050 – Rules and regulations

2020 Washington Code 81.12.050 – Rules and regulations

2019 Washington Code 81.12.050

2018 Washington Code 81.12.050 – Rules and regulations

2016 Washington Code 81.12.050 – Rules and regulations

2015 Washington Code 81.12.050 – Rules and regulations

2014 Washington Code 81.12.050 – Rules and regulations

2013 Washington Code 81.12.050 – Rules and regulations

2009 Washington Code 81.12.050 – Rules and regulations