2023 Washington Code 23.86.160 – Apportionment of earnings

2022 Washington Code 23.86.160 – Apportionment of earnings

2020 Washington Code 23.86.160 – Apportionment of earnings

2019 Washington Code 23.86.160 – Apportionment of earnings

2018 Washington Code 23.86.160 – Apportionment of earnings

2016 Washington Code 23.86.160 – Apportionment of earnings

2015 Washington Code 23.86.160 – Apportionment of earnings

2014 Washington Code 23.86.160 – Apportionment of earnings

2013 Washington Code 23.86.160 – Apportionment of earnings

2009 Washington Code 23.86.160 – Apportionment of earnings