Versions of Iowa Code 147.4 - Grounds for refusing on LawServer 2023 Iowa Code 147.4 – Grounds for refusing 2022 Iowa Code 147.4 – Grounds for refusing 2020 Iowa Code 147.4 – Grounds for refusing 2018 Iowa Code 147.4 – Grounds for refusing 2016 Iowa Code 147.4 – Grounds for refusing 2014 Iowa Code 147.4 – Grounds for refusing. 2009 Iowa Code 147.4 – Grounds for refusing