Versions of Iowa Code 124.417 - Imitation controlled substances -- exceptions on LawServer 2023 Iowa Code 124.417 – Imitation controlled substances — exceptions 2022 Iowa Code 124.417 – Imitation controlled substances — exceptions. 2020 Iowa Code 124.417 – Imitation controlled substances — exceptions. 2018 Iowa Code 124.417 – Imitation controlled substances — exceptions.