Versions of Iowa Code 420.137 - Applicable laws on LawServer 2024 Iowa Code 420.137 – Applicable laws 2023 Iowa Code 420.137 – Applicable laws 2022 Iowa Code 420.137 – Applicable laws 2020 Iowa Code 420.137 – Applicable laws 2018 Iowa Code 420.137 – Applicable laws 2016 Iowa Code 420.137 – Applicable laws 2014 Iowa Code 420.137 – Applicable laws. 2009 Iowa Code 420.137 – Applicable laws