Versions of Iowa Code 321.397 - Lamps on bicycles on LawServer 2023 Iowa Code 321.397 – Lamps on bicycles 2022 Iowa Code 321.397 – Lamps on bicycles 2020 Iowa Code 321.397 – Lamps on bicycles 2018 Iowa Code 321.397 – Lamps on bicycles 2016 Iowa Code 321.397 – Lamps on bicycles 2014 Iowa Code 321.397 – Lamps on bicycles. 2009 Iowa Code 321.397 – Lamps on bicycles