2024 Iowa Code 321.423 – Flashing lights

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