2023 Washington Code 18.210.170 – Professional development

2022 Washington Code 18.210.170 – Professional development

2020 Washington Code 18.210.170 – Professional development

2019 Washington Code 18.210.170 – Professional development

2018 Washington Code 18.210.170 – Professional development

2016 Washington Code 18.210.170 – Professional development

2015 Washington Code 18.210.170 – Professional development

2014 Washington Code 18.210.170 – Professional development

2013 Washington Code 18.210.170 – Professional development

2009 Washington Code 18.210.170 – Continuing education