— Shoring timbers should be at least a handspan in width and breadth.
— Mine shafts should be shored every three paces.
— Mine shafts should not be wider than three paces nor higher than two paces.
— Mine chambers should not be excavated wider than five paces between rock pillars left for roof support.
— No shouting or other loud noises.
— No running or horseplay.
— No racing in the mining carts.