30 C.F.R. § 57.15003 Protective footwear.
Title 30 - Mineral Resources
All persons shall wear suitable protective footwear when in or around an area of a mine or plant where a hazard exists which could cause an injury to the feet.
Title 30: Mineral Resources
PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
Subpart N—Personal Protection
Surface and Underground
§ 57.15003 Protective footwear.

