Versions of Iowa Code 155.4 - Licensing function on LawServer 2024 Iowa Code 155.4 – Licensing function 2023 Iowa Code 155.4 – Licensing function 2022 Iowa Code 155.4 – Licensing function 2020 Iowa Code 155.4 – Licensing function 2018 Iowa Code 155.4 – Licensing function 2016 Iowa Code 155.4 – Licensing function 2014 Iowa Code 155.4 – Licensing function. 2009 Iowa Code 155.4 – Licensing function