2023 Iowa Code 321.123 – Trailers

2022 Iowa Code 321.123 – Trailers

2020 Iowa Code 321.123 – Trailers

2018 Iowa Code 321.123 – Trailers

2016 Iowa Code 321.123 – Trailers

2014 Iowa Code 321.123 – Trailers.

2009 Iowa Code 321.123 – Trailers