Versions of Iowa Code 336.8 - Powers on LawServer 2024 Iowa Code 336.8 – Powers 2023 Iowa Code 336.8 – Powers 2022 Iowa Code 336.8 – Powers 2020 Iowa Code 336.8 – Powers 2018 Iowa Code 336.8 – Powers 2016 Iowa Code 336.8 – Powers 2014 Iowa Code 336.8 – Powers. 2009 Iowa Code 336.8 – Powers