2023 Iowa Code 321.417 – Single-beam road-lighting equipment

2022 Iowa Code 321.417 – Single-beam road-lighting equipment

2020 Iowa Code 321.417 – Single-beam road-lighting equipment

2018 Iowa Code 321.417 – Single-beam road-lighting equipment

2016 Iowa Code 321.417 – Single-beam road-lighting equipment

2014 Iowa Code 321.417 – Single-beam road-lighting equipment.

2009 Iowa Code 321.417 – Single-beam road-lighting equipment