2023 Washington Code 19.98.900 – Effective date — 1975 1st ex.s. c 277

2022 Washington Code 19.98.900 – Effective date–1975 1st ex.s. c 277

2020 Washington Code 19.98.900 – Effective date — 1975 1st ex.s. c 277

2019 Washington Code 19.98.900 – Effective date — 1975 1st ex.s. c 277

2018 Washington Code 19.98.900 – Effective date — 1975 1st ex.s. c 277

2016 Washington Code 19.98.900 – Effective date–1975 1st ex.s. c 277

2015 Washington Code 19.98.900 – Effective date–1975 1st ex.s. c 277

2014 Washington Code 19.98.900 – Effective date — 1975 1st ex.s. c 277

2013 Washington Code 19.98.900 – Effective date — 1975 1st ex.s. c 277

2009 Washington Code 19.98.900 – Effective date — 1975 1st ex.s. c 277