2024 40 CFR 27.9 – Answer

2023 40 CFR 27.9 – Answer

2022 40 CFR 27.9 – Answer

2021 40 CFR 27.9 – Answer

2020 40 CFR 27.9 – Answer

2019 40 CFR 27.9 – Answer

2016 40 CFR 27.9 – Answer

2015 40 CFR 27.9 – Answer

2014 40 CFR 27.9 – Answer