2023 Washington Code 9.95.090 – Labor required

2022 Washington Code 9.95.090 – Labor required

2020 Washington Code 9.95.090 – Labor required

2019 Washington Code 9.95.090 – Labor required

2018 Washington Code 9.95.090 – Labor required

2016 Washington Code 9.95.090 – Labor required

2015 Washington Code 9.95.090 – Labor required

2014 Washington Code 9.95.090 – Labor required

2013 Washington Code 9.95.090 – Labor required

2009 Washington Code 9.95.090 – Labor required