2023 Washington Code 18.51.280 – Chapter cumulative

2022 Washington Code 18.51.280 – Chapter cumulative

2020 Washington Code 18.51.280 – Chapter cumulative

2019 Washington Code 18.51.280 – Chapter cumulative

2018 Washington Code 18.51.280 – Chapter cumulative

2016 Washington Code 18.51.280 – Chapter cumulative

2015 Washington Code 18.51.280 – Chapter cumulative

2014 Washington Code 18.51.280 – Chapter cumulative

2013 Washington Code 18.51.280 – Chapter cumulative

2009 Washington Code 18.51.280 – Chapter cumulative