Versions of Iowa Code 321.474 - Department may restrict on LawServer 2023 Iowa Code 321.474 – Department may restrict 2022 Iowa Code 321.474 – Department may restrict 2020 Iowa Code 321.474 – Department may restrict 2018 Iowa Code 321.474 – Department may restrict 2016 Iowa Code 321.474 – Department may restrict 2014 Iowa Code 321.474 – Department may restrict. 2009 Iowa Code 321.474 – Department may restrict