2023 Iowa Code 214A.2B – Laboratory for motor fuel and biofuels

2022 Iowa Code 214A.2B – Laboratory for motor fuel and biofuels

2020 Iowa Code 214A.2B – Laboratory for motor fuel and biofuels

2018 Iowa Code 214A.2B – Laboratory for motor fuel and biofuels

2016 Iowa Code 214A.2B – Laboratory for motor fuel and biofuels

2014 Iowa Code 214A.2B – Laboratory for motor fuel and biofuels.

2009 Iowa Code 214A.2B – Laboratory for motor fuel and biofuels