Versions of Iowa Code 167.22 - Chronic wasting disease on LawServer 2023 Iowa Code 167.22 – Chronic wasting disease 2022 Iowa Code 167.22 – Chronic wasting disease 2020 Iowa Code 167.22 – Chronic wasting disease 2018 Iowa Code 167.22 – Chronic wasting disease 2016 Iowa Code 167.22 – Chronic wasting disease 2014 Iowa Code 167.22 – Chronic wasting disease. 2009 Iowa Code 167.22 – Chronic wasting disease