Versions of Iowa Code 179.13 - Referendum on LawServer 2023 Iowa Code 179.13 – Referendum 2022 Iowa Code 179.13 – Referendum 2020 Iowa Code 179.13 – Referendum 2018 Iowa Code 179.13 – Referendum 2016 Iowa Code 179.13 – Referendum 2014 Iowa Code 179.13 – Referendum. 2009 Iowa Code 179.13 – Referendum