2024 Iowa Code 455H.511 – Federal stringency

2023 Iowa Code 455H.511 – Federal stringency

2022 Iowa Code 455H.511 – Federal stringency

2020 Iowa Code 455H.511 – Federal stringency

2018 Iowa Code 455H.511 – Federal stringency

2016 Iowa Code 455H.511 – Federal stringency

2014 Iowa Code 455H.511 – Federal stringency.

2009 Iowa Code 455H.511 – Federal stringency