Versions of Iowa Code 423.3 - Exemptions on LawServer 2024 Iowa Code 423.3 – Exemptions 2023 Iowa Code 423.3 – Exemptions 2022 Iowa Code 423.3 – Exemptions 2020 Iowa Code 423.3 – Exemptions 2018 Iowa Code 423.3 – Exemptions 2016 Iowa Code 423.3 – Exemptions 2014 Iowa Code 423.3 – Exemptions. 2009 Iowa Code 423.3 – Exemptions