Versions of Iowa Code 489.302 - Statement of authority on LawServer 2023 Iowa Code 489.302 – Statement of authority 2022 Iowa Code 489.302 – Statement of authority 2020 Iowa Code 489.302 – Statement of authority 2018 Iowa Code 489.302 – Statement of authority 2016 Iowa Code 489.302 – Statement of authority 2014 Iowa Code 489.302 – Statement of authority. 2009 Iowa Code 489.302 – Statement of authority