2023 Washington Code 9.41.290 – State preemption

2022 Washington Code 9.41.290 – State preemption

2020 Washington Code 9.41.290 – State preemption

2019 Washington Code 9.41.290 – State preemption

2018 Washington Code 9.41.290 – State preemption

2016 Washington Code 9.41.290 – State preemption

2015 Washington Code 9.41.290 – State preemption

2014 Washington Code 9.41.290 – State preemption

2013 Washington Code 9.41.290 – State preemption

2009 Washington Code 9.41.290 – State preemption