2023 Washington Code 41.40.048 – Employer’s contribution — Computation — Billing

2022 Washington Code 41.40.048 – Employer’s contribution–Computation–Billing

2020 Washington Code 41.40.048 – Employer’s contribution — Computation — Billing

2019 Washington Code 41.40.048 – Employer’s contribution — Computation — Billing

2018 Washington Code 41.40.048 – Employer’s contribution — Computation — Billing

2016 Washington Code 41.40.048 – Employer’s contribution–Computation–Billing

2015 Washington Code 41.40.048 – Employer’s contribution–Computation–Billing

2014 Washington Code 41.40.048 – Employer’s contribution — Computation — Billing

2013 Washington Code 41.40.048 – Employer’s contribution — Computation — Billing

2009 Washington Code 41.40.048 – Employer’s contribution — Computation — Billing