Versions of Iowa Code 321I.9 - Exempt vehicles on LawServer 2024 Iowa Code 321I.9 – Exempt vehicles 2023 Iowa Code 321I.9 – Exempt vehicles 2022 Iowa Code 321I.9 – Exempt vehicles 2020 Iowa Code 321I.9 – Exempt vehicles 2018 Iowa Code 321I.9 – Exempt vehicles 2016 Iowa Code 321I.9 – Exempt vehicles 2014 Iowa Code 321I.9 – Exempt vehicles. 2009 Iowa Code 321I.9 – Exempt vehicles