TITLE 30 - MINERAL RESOURCES

CHAPTER I - MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR

SUBCHAPTER K - METAL AND NONMETAL MINE SAFETY AND HEALTH

PART 57 - SAFETY AND HEALTH STANDARDS - UNDERGROUND METAL AND NONMETAL MINES

subpart m - MACHINERY AND EQUIPMENT

57.14216 - Backpoling.

Backpoling of trolleys is prohibited except where there is inadequate clearance to reverse the trolley pole. Where backpoling is required, it shall be done only at the minimum tram speed of the trolley.