Versions of Iowa Code 321.304 - Prohibited passing on LawServer 2023 Iowa Code 321.304 – Prohibited passing 2022 Iowa Code 321.304 – Prohibited passing 2020 Iowa Code 321.304 – Prohibited passing 2018 Iowa Code 321.304 – Prohibited passing 2016 Iowa Code 321.304 – Prohibited passing 2014 Iowa Code 321.304 – Prohibited passing. 2009 Iowa Code 321.304 – Prohibited passing
