2023 Washington Code 71.32.070 – Prohibited elements

2022 Washington Code 71.32.070 – Prohibited elements

2020 Washington Code 71.32.070 – Prohibited elements

2019 Washington Code 71.32.070

2018 Washington Code 71.32.070 – Prohibited elements

2016 Washington Code 71.32.070 – Prohibited elements

2015 Washington Code 71.32.070 – Prohibited elements

2014 Washington Code 71.32.070 – Prohibited elements

2013 Washington Code 71.32.070 – Prohibited elements

2009 Washington Code 71.32.070 – Prohibited elements