Versions of Iowa Code 321.396 - Exception on LawServer 2023 Iowa Code 321.396 – Exception 2022 Iowa Code 321.396 – Exception 2020 Iowa Code 321.396 – Exception 2018 Iowa Code 321.396 – Exception 2016 Iowa Code 321.396 – Exception 2014 Iowa Code 321.396 – Exception. 2009 Iowa Code 321.396 – Exception