Versions of Iowa Code 321.372A - Prompt investigation of reported violation of failing to obey school bus warning devices -- citation issued to driver or owner on LawServer 2023 Iowa Code 321.372A – Prompt investigation of reported violation of failing to obey school bus warning devices — citation issued to driver or owner 2022 Iowa Code 321.372A – Prompt investigation of reported violation of failing to obey school bus warning devices — citation issued to driver or owner. 2020 Iowa Code 321.372A – Prompt investigation of reported violation of failing to obey school bus warning devices — citation issued to driver or owner. 2018 Iowa Code 321.372A – Prompt investigation of reported violation of failing to obey school bus warning devices — citation issued to driver or owner. 2016 Iowa Code 321.372A – Prompt investigation of reported violation of failing to obey school bus warning devices 2014 Iowa Code 321.372A – Prompt investigation of reported violation of failing to obey school bus warning devices – citation issued to driver or owner. 2009 Iowa Code 321.372A – Prompt investigation of reported violation of failing to obey school bus warning devices — citation issued to driver or owner