2023 Iowa Code 125.21 – Chemical substitutes and antagonists programs

2022 Iowa Code 125.21 – Chemical substitutes and antagonists programs

2020 Iowa Code 125.21 – Chemical substitutes and antagonists programs

2018 Iowa Code 125.21 – Chemical substitutes and antagonists programs

2016 Iowa Code 125.21 – Chemical substitutes and antagonists programs

2014 Iowa Code 125.21 – Chemical substitutes and antagonists programs.

2009 Iowa Code 125.21 – Chemical substitutes and antagonists programs