Versions of Iowa Code 904.504 - Federal prisoners on LawServer 2023 Iowa Code 904.504 – Federal prisoners 2022 Iowa Code 904.504 – Federal prisoners 2020 Iowa Code 904.504 – Federal prisoners 2018 Iowa Code 904.504 – Federal prisoners 2016 Iowa Code 904.504 – Federal prisoners 2014 Iowa Code 904.504 – Federal prisoners. 2009 Iowa Code 904.504 – Federal prisoners