In underground mines during shift changes, the movement of rock or material trains shall be limited to areas where such trains could not present a hazard to men coming on or going off shift.
Ariz. Admin. Code § R11-1-655
In underground mines during shift changes, the movement of rock or material trains shall be limited to areas where such trains could not present a hazard to men coming on or going off shift.
Ariz. Admin. Code § R11-1-655