Versions of Iowa Code 326.23 - Trip permits on LawServer 2024 Iowa Code 326.23 – Trip permits 2023 Iowa Code 326.23 – Trip permits 2022 Iowa Code 326.23 – Trip permits 2020 Iowa Code 326.23 – Trip permits 2018 Iowa Code 326.23 – Trip permits 2016 Iowa Code 326.23 – Trip permits 2014 Iowa Code 326.23 – Trip permits. 2009 Iowa Code 326.23 – Trip permits