Versions of Iowa Code 135I.6 - Enforcement on LawServer 2024 Iowa Code 135I.6 – Enforcement 2023 Iowa Code 135I.6 – Enforcement 2022 Iowa Code 135I.6 – Enforcement 2020 Iowa Code 135I.6 – Enforcement 2018 Iowa Code 135I.6 – Enforcement 2016 Iowa Code 135I.6 – Enforcement 2014 Iowa Code 135I.6 – Enforcement. 2009 Iowa Code 135I.6 – Enforcement