Versions of Iowa Code 321.449A - Rail crew transport drivers on LawServer 2023 Iowa Code 321.449A – Rail crew transport drivers 2022 Iowa Code 321.449A – Rail crew transport drivers 2020 Iowa Code 321.449A – Rail crew transport drivers 2018 Iowa Code 321.449A – Rail crew transport drivers 2016 Iowa Code 321.449A – Rail crew transport drivers 2014 Iowa Code 321.449A – Rail crew transport drivers.