2024 Iowa Code 468.174 – Membership in the national drainage association

2023 Iowa Code 468.174 – Membership in the national drainage association

2022 Iowa Code 468.174 – Membership in the national drainage association

2020 Iowa Code 468.174 – Membership in the national drainage association

2018 Iowa Code 468.174 – Membership in the national drainage association

2016 Iowa Code 468.174 – Membership in the national drainage association

2014 Iowa Code 468.174 – Membership in the national drainage association.

2009 Iowa Code 468.174 – Membership in the national drainage association