Versions of Iowa Code 148.12 - Voluntary agreements on LawServer 2023 Iowa Code 148.12 – Voluntary agreements 2022 Iowa Code 148.12 – Voluntary agreements 2020 Iowa Code 148.12 – Voluntary agreements 2018 Iowa Code 148.12 – Voluntary agreements 2016 Iowa Code 148.12 – Voluntary agreements 2014 Iowa Code 148.12 – Voluntary agreements. 2009 Iowa Code 148.12 – Voluntary agreements