30 C.F.R. § 56.19101 Stopblocks and derail switches.
Title 30 - Mineral Resources
Positive stopblocks or a derail switch shall be installed on all tracks leading to a shaft collar or landing.
Title 30: Mineral Resources
PART 56—SAFETY AND HEALTH STANDARDS—SURFACE METAL AND NONMETAL MINES
Subpart R—Personnel Hoisting
Shafts
§ 56.19101 Stopblocks and derail switches.