30 C.F.R. § 77.1700 Communications in work areas.
Title 30 - Mineral Resources
No employee shall be assigned, or allowed, or be required to perform work alone in any area where hazardous conditions exist that would endanger his safety unless he can communicate with others, can be heard, or can be seen.
Title 30: Mineral Resources
PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES
Subpart R—Miscellaneous
§ 77.1700 Communications in work areas.
