2023 Iowa Code 321.451 – Emergency vehicles — certificate of designation

2022 Iowa Code 321.451 – Emergency vehicles — certificate of designation.

2020 Iowa Code 321.451 – Emergency vehicles — certificate of designation.

2018 Iowa Code 321.451 – Emergency vehicles — certificate of designation.

2016 Iowa Code 321.451 – Emergency vehicles

2014 Iowa Code 321.451 – Emergency vehicles – certificate of designation.

2009 Iowa Code 321.451 – Emergency vehicles — certificate of designation