Versions of Iowa Code 670.4 - Claims exempted on LawServer 2023 Iowa Code 670.4 – Claims exempted 2022 Iowa Code 670.4 – Claims exempted 2020 Iowa Code 670.4 – Claims exempted 2018 Iowa Code 670.4 – Claims exempted 2016 Iowa Code 670.4 – Claims exempted 2014 Iowa Code 670.4 – Claims exempted. 2009 Iowa Code 670.4 – Claims exempted