2023 Washington Code 18.360.040 – Certification and registration requirements

2022 Washington Code 18.360.040 – Certification and registration requirements

2020 Washington Code 18.360.040 – Certification and registration requirements

2019 Washington Code 18.360.040 – Certification and registration requirements

2018 Washington Code 18.360.040 – Certification and registration requirements

2016 Washington Code 18.360.040 – Certification and registration requirements

2015 Washington Code 18.360.040 – Certification and registration requirements

2014 Washington Code 18.360.040 – Certification and registration requirements

2013 Washington Code 18.360.040 – Certification and registration requirements