2023 Washington Code 23B.01.590 – Public service companies entitled to deductions

2022 Washington Code 23B.01.590 – Public service companies entitled to deductions

2020 Washington Code 23B.01.590 – Public service companies entitled to deductions

2019 Washington Code 23B.01.590 – Public service companies entitled to deductions

2018 Washington Code 23B.01.590 – Public service companies entitled to deductions

2016 Washington Code 23B.01.590 – Public service companies entitled to deductions

2015 Washington Code 23B.01.590 – Public service companies entitled to deductions

2014 Washington Code 23B.01.590 – Public service companies entitled to deductions

2013 Washington Code 23B.01.590 – Public service companies entitled to deductions

2009 Washington Code 23B.01.590 – Public service companies entitled to deductions