2024 30 CFR 57.19106 – Shaft sets

2023 30 CFR 57.19106 – Shaft sets

2022 30 CFR 57.19106 – Shaft sets

2021 30 CFR 57.19106 – Shaft sets

2020 30 CFR 57.19106 – Shaft sets

2019 30 CFR 57.19106 – Shaft sets

2016 30 CFR 57.19106 – Shaft sets

2015 30 CFR 57.19106 – Shaft sets

2014 30 CFR 57.19106 – Shaft sets

2010 30 CFR 57.19106 – Shaft sets

2009 30 CFR 57.19106 – Shaft sets