Versions of Iowa Code 321.134 - Monthly penalty on LawServer 2023 Iowa Code 321.134 – Monthly penalty 2022 Iowa Code 321.134 – Monthly penalty 2020 Iowa Code 321.134 – Monthly penalty 2018 Iowa Code 321.134 – Monthly penalty 2016 Iowa Code 321.134 – Monthly penalty 2014 Iowa Code 321.134 – Monthly penalty. 2009 Iowa Code 321.134 – Monthly penalty