Versions of Iowa Code 453B.18 - Exemption -- Iowa hemp Act -- negligent violation program on LawServer 2024 Iowa Code 453B.18 – Exemption — Iowa hemp Act — negligent violation program 2023 Iowa Code 453B.18 – Exemption — Iowa hemp Act — negligent violation program 2022 Iowa Code 453B.18 – Exemption — Iowa hemp Act — negligent violation program.