Versions of Iowa Code 321.408 - Back-up lamps on LawServer 2024 Iowa Code 321.408 – Back-up lamps 2023 Iowa Code 321.408 – Back-up lamps 2022 Iowa Code 321.408 – Back-up lamps 2020 Iowa Code 321.408 – Back-up lamps 2018 Iowa Code 321.408 – Back-up lamps 2016 Iowa Code 321.408 – Back-up lamps 2014 Iowa Code 321.408 – Back-up lamps. 2009 Iowa Code 321.408 – Back-up lamps