SUBCHAPTER K—METAL AND NONMETAL MINE SAFETY AND HEALTH (parts 56 to 58)
- PART 56—SAFETY AND HEALTH STANDARDS—SURFACE METAL AND NONMETAL MINES
- PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
- PART 58—HEALTH STANDARDS FOR METAL AND NONMETAL MINES