2024 30 CFR 57.8518 – Main and booster fans

2023 30 CFR 57.8518 – Main and booster fans

2022 30 CFR 57.8518 – Main and booster fans

2021 30 CFR 57.8518 – Main and booster fans

2020 30 CFR 57.8518 – Main and booster fans

2019 30 CFR 57.8518 – Main and booster fans

2016 30 CFR 57.8518 – Main and booster fans

2015 30 CFR 57.8518 – Main and booster fans

2014 30 CFR 57.8518 – Main and booster fans

2010 30 CFR 57.8518 – Main and booster fans

2009 30 CFR 57.8518 – Main and booster fans