2024 30 CFR 57.12041 – Design of switches and starting boxes

2023 30 CFR 57.12041 – Design of switches and starting boxes

2022 30 CFR 57.12041 – Design of switches and starting boxes

2021 30 CFR 57.12041 – Design of switches and starting boxes

2020 30 CFR 57.12041 – Design of switches and starting boxes

2019 30 CFR 57.12041 – Design of switches and starting boxes

2016 30 CFR 57.12041 – Design of switches and starting boxes

2015 30 CFR 57.12041 – Design of switches and starting boxes

2014 30 CFR 57.12041 – Design of switches and starting boxes

2010 30 CFR 57.12041 – Design of switches and starting boxes

2009 30 CFR 57.12041 – Design of switches and starting boxes