Versions of Iowa Code 321.431 - Performance ability on LawServer 2023 Iowa Code 321.431 – Performance ability 2022 Iowa Code 321.431 – Performance ability 2020 Iowa Code 321.431 – Performance ability 2018 Iowa Code 321.431 – Performance ability 2016 Iowa Code 321.431 – Performance ability 2014 Iowa Code 321.431 – Performance ability. 2009 Iowa Code 321.431 – Performance ability