2023 Washington Code 26.20.080 – Proof of wilfulness — Application of penalty provisions

2022 Washington Code 26.20.080 – Proof of wilfulness–Application of penalty provisions

2020 Washington Code 26.20.080 – Proof of wilfulness — Application of penalty provisions

2019 Washington Code 26.20.080 – Proof of wilfulness — Application of penalty provisions

2018 Washington Code 26.20.080 – Proof of wilfulness — Application of penalty provisions

2016 Washington Code 26.20.080 – Proof of wilfulness–Application of penalty provisions

2015 Washington Code 26.20.080 – Proof of wilfulness–Application of penalty provisions

2014 Washington Code 26.20.080 – Proof of wilfulness — Application of penalty provisions

2013 Washington Code 26.20.080 – Proof of wilfulness — Application of penalty provisions

2009 Washington Code 26.20.080 – Proof of wilfulness — Application of penalty provisions