2023 Washington Code 21.20.900 – Construction to secure uniformity

2022 Washington Code 21.20.900 – Construction to secure uniformity

2020 Washington Code 21.20.900 – Construction to secure uniformity

2019 Washington Code 21.20.900 – Construction to secure uniformity

2018 Washington Code 21.20.900 – Construction to secure uniformity

2016 Washington Code 21.20.900 – Construction to secure uniformity

2015 Washington Code 21.20.900 – Construction to secure uniformity

2014 Washington Code 21.20.900 – Construction to secure uniformity

2013 Washington Code 21.20.900 – Construction to secure uniformity

2009 Washington Code 21.20.900 – Construction to secure uniformity