Versions of Iowa Code 321.290 - Special restrictions on LawServer 2023 Iowa Code 321.290 – Special restrictions 2022 Iowa Code 321.290 – Special restrictions 2020 Iowa Code 321.290 – Special restrictions 2018 Iowa Code 321.290 – Special restrictions 2016 Iowa Code 321.290 – Special restrictions 2014 Iowa Code 321.290 – Special restrictions. 2009 Iowa Code 321.290 – Special restrictions