2023 Washington Code 48.41.900 – Federal supremacy

2022 Washington Code 48.41.900 – Federal supremacy

2020 Washington Code 48.41.900 – Federal supremacy

2019 Washington Code 48.41.900

2018 Washington Code 48.41.900 – Federal supremacy

2016 Washington Code 48.41.900 – Federal supremacy

2015 Washington Code 48.41.900 – Federal supremacy

2014 Washington Code 48.41.900 – Federal supremacy

2013 Washington Code 48.41.900 – Federal supremacy

2009 Washington Code 48.41.900 – Federal supremacy