2024 Ohio Code 1563.12 – Construction regulations to be observed in opening mine

2023 Ohio Code 1563.12 – Construction regulations to be observed in opening mine

2020 Ohio Code 1563.12 – Construction regulations to be observed in opening mine

2018 Ohio Code 1563.12 – Construction regulations to be observed in opening mine

2016 Ohio Code 1563.12 – Construction regulations to be observed in opening mine

2015 Ohio Code 1563.12 – Construction regulations to be observed in opening mine

2014 Ohio Code 1563.12 – Construction regulations to be observed in opening mine

2013 Ohio Code 1563.12 – Construction regulations to be observed in opening mine

2009 Ohio Code 1563.12 – Construction regulations to be observed in opening mine