Versions of Iowa Code 508C.15 - Tax exemptions. on LawServer 2024 Iowa Code 508C.15 – Tax exemptions 2023 Iowa Code 508C.15 – Tax exemptions 2022 Iowa Code 508C.15 – Tax exemptions 2020 Iowa Code 508C.15 – Tax exemptions 2018 Iowa Code 508C.15 – Tax exemptions 2016 Iowa Code 508C.15 – Tax exemptions 2014 Iowa Code 508C.15 – Tax exemptions. 2009 Iowa Code 508C.15 – Tax exemptions