Versions of California Streets and Highways Code 22000 - This part may be cited as the Tree Planting Act of 1931. on LawServer 2024 California Streets and Highways Code 22000 – This part may be cited as the Tree Planting Act of 1931. 2023 California Streets and Highways Code 22000 – This part may be cited as the Tree Planting Act of 1931. 2022 California Streets and Highways Code 22000 – This part may be cited as the Tree Planting Act of 1931. 2021 California Streets and Highways Code 22000 – This part may be cited as the Tree Planting Act of 1931. 2020 California Streets and Highways Code 22000 – This part may be cited as the Tree Planting Act of 1931. 2019 California Streets and Highways Code 22000 – This part may be cited as the Tree Planting Act of 1931. 2017 California Streets and Highways Code 22000 – This part may be cited as the Tree Planting Act of 1931. 2016 California Streets and Highways Code 22000 – This part may be cited as the Tree Planting Act of 1931. 2015 California Streets and Highways Code 22000 – This part may be cited as the Tree Planting Act of 1931. 2014 California Streets and Highways Code 22000 – This part may be cited as the Tree Planting Act of 1931. 2013 California Streets and Highways Code 22000 – This part may be cited as the Tree Planting Act of 1931 2010 California Streets and Highways Code 22000 2009 California Streets and Highways Code 22000