Versions of Iowa Code 321.423 - Flashing lights on LawServer 2023 Iowa Code 321.423 – Flashing lights 2022 Iowa Code 321.423 – Flashing lights 2020 Iowa Code 321.423 – Flashing lights 2018 Iowa Code 321.423 – Flashing lights 2016 Iowa Code 321.423 – Flashing lights 2014 Iowa Code 321.423 – Flashing lights. 2009 Iowa Code 321.423 – Flashing lights
