2023 Washington Code 15.92.030 – Primary activities — Cooperative with University of Washington

2022 Washington Code 15.92.030 – Primary activities–Cooperative with University of Washington

2020 Washington Code 15.92.030 – Primary activities — Cooperative with University of Washington

2019 Washington Code 15.92.030 – Primary activities — Cooperative with University of Washington

2018 Washington Code 15.92.030 – Primary activities — Cooperative with University of Washington

2016 Washington Code 15.92.030 – Primary activities–Cooperative with University of Washington

2015 Washington Code 15.92.030 – Primary activities–Cooperative with University of Washington

2014 Washington Code 15.92.030 – Primary activities — Cooperative with University of Washington

2013 Washington Code 15.92.030 – Primary activities — Cooperative with University of Washington

2009 Washington Code 15.92.030 – Primary activities — Cooperative with University of Washington