Versions of Iowa Code 135D.4 - Iowa health information network -- principles -- technical infrastructure requirements on LawServer 2023 Iowa Code 135D.4 – Iowa health information network — principles — technical infrastructure requirements 2022 Iowa Code 135D.4 – Iowa health information network — principles — technical infrastructure requirements. 2020 Iowa Code 135D.4 – Iowa health information network — principles — technical infrastructure requirements. 2018 Iowa Code 135D.4 – Iowa health information network — principles — technical infrastructure requirements.