2023 Washington Code 28A.410.025 – Qualifications — Certificate or permit required

2022 Washington Code 28A.410.025 – Qualifications–Certificate or permit required

2020 Washington Code 28A.410.025 – Qualifications — Certificate or permit required

2019 Washington Code 28A.410.025 – Qualifications — Certificate or permit required

2018 Washington Code 28A.410.025 – Qualifications — Certificate or permit required

2016 Washington Code 28A.410.025 – Qualifications–Certificate or permit required

2015 Washington Code 28A.410.025 – Qualifications–Certificate or permit required

2014 Washington Code 28A.410.025 – Qualifications — Certificate or permit required

2013 Washington Code 28A.410.025 – Qualifications — Certificate or permit required

2009 Washington Code 28A.410.025 – Qualifications — Certificate or permit required