2024 Michigan Laws 67.21 – Trees in highways; street lighting

2023 Michigan Laws 67.21 – Trees in highways; street lighting

2022 Michigan Laws 67.21 – Trees in highways; street lighting

2020 Michigan Laws 67.21 – Trees in highways; street lighting

2019 Michigan Laws 67.21 – Trees in highways; street lighting

2017 Michigan Laws 67.21 – Trees in highways; street lighting

2016 Michigan Laws 67.21 – Trees in highways; street lighting

2015 Michigan Laws 67.21 – Trees in highways; street lighting

2014 Michigan Laws 67.21 – Trees in highways; street lighting

2013 Michigan Laws 67.21 – Trees in highways; street lighting

2009 Michigan Laws 67.21 – Trees in highways; street lighting