TITLE 30 - MINERAL RESOURCES

CHAPTER I - MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR

SUBCHAPTER K - METAL AND NONMETAL MINE SAFETY AND HEALTH

PART 56 - SAFETY AND HEALTH STANDARDS - SURFACE METAL AND NONMETAL MINES

subpart s - MISCELLANEOUS

56.20011 - Barricades and warning signs.

Areas where health or safety hazards exist that are not immediately obvious to employees shall be barricaded, or warning signs shall be posted at all approaches. Warning signs shall be readily visible, legible, and display the nature of the hazard and any protective action required.