Versions of Iowa Code 159.5 - Powers and duties on LawServer 2023 Iowa Code 159.5 – Powers and duties 2022 Iowa Code 159.5 – Powers and duties 2020 Iowa Code 159.5 – Powers and duties 2018 Iowa Code 159.5 – Powers and duties 2016 Iowa Code 159.5 – Powers and duties 2014 Iowa Code 159.5 – Powers and duties. 2009 Iowa Code 159.5 – Powers and duties