2023 Iowa Code 321.310 – Towing four-wheeled trailers

2022 Iowa Code 321.310 – Towing four-wheeled trailers

2020 Iowa Code 321.310 – Towing four-wheeled trailers

2018 Iowa Code 321.310 – Towing four-wheeled trailers

2016 Iowa Code 321.310 – Towing four-wheeled trailers

2014 Iowa Code 321.310 – Towing four-wheeled trailers.

2009 Iowa Code 321.310 – Towing four-wheeled trailers