2023 Washington Code 69.41.190 – Preferred drug substitution — Exceptions — Notice — Limited restrictions

2022 Washington Code 69.41.190 – Preferred drug substitution–Exceptions–Notice–Limited restrictions

2020 Washington Code 69.41.190 – Preferred drug substitution — Exceptions — Notice — Limited restrictions

2019 Washington Code 69.41.190

2018 Washington Code 69.41.190 – Preferred drug substitution — Exceptions — Notice — Limited restrictions

2016 Washington Code 69.41.190 – Preferred drug substitution–Exceptions–Notice–Limited restrictions

2015 Washington Code 69.41.190 – Preferred drug substitution–Exceptions–Notice–Limited restrictions

2014 Washington Code 69.41.190 – Preferred drug substitution — Exceptions — Notice — Limited restrictions

2013 Washington Code 69.41.190 – Preferred drug substitution — Exceptions — Notice — Limited restrictions

2009 Washington Code 69.41.190 – Preferred drug substitution — Exceptions — Notice