30 C.F.R. § 57.10007 Falling object protection.
Title 30 - Mineral Resources
Guard nets or other suitable protection shall be provided where tramways pass over roadways, walkways, or buildings.
Title 30: Mineral Resources
PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
Subpart I—Aerial Tramways
§ 57.10007 Falling object protection.

