2023 Washington Code 74.42.400 – Engineering and maintenance personnel

2022 Washington Code 74.42.400 – Engineering and maintenance personnel

2020 Washington Code 74.42.400 – Engineering and maintenance personnel

2019 Washington Code 74.42.400

2018 Washington Code 74.42.400 – Engineering and maintenance personnel

2016 Washington Code 74.42.400 – Engineering and maintenance personnel

2015 Washington Code 74.42.400 – Engineering and maintenance personnel

2014 Washington Code 74.42.400 – Engineering and maintenance personnel

2013 Washington Code 74.42.400 – Engineering and maintenance personnel

2009 Washington Code 74.42.400 – Engineering and maintenance personnel