2019 Washington Code 28B.52.073 – Unfair labor practices

2009 Washington Code 28B.52.073 – Unfair labor practices

2013 Washington Code 28B.52.073 – Unfair labor practices

2014 Washington Code 28B.52.073 – Unfair labor practices

2015 Washington Code 28B.52.073 – Unfair labor practices

2016 Washington Code 28B.52.073 – Unfair labor practices

2018 Washington Code 28B.52.073 – Unfair labor practices