Which requirement must all persons entering underground fulfill regarding self-rescuers?

All persons entering underground must examine their self-rescue equipment for damage. This requirement ensures that the equipment is in proper working condition and can effectively protect individuals in case of an emergency, such as a fire or gas leak. Self-rescuers are critical safety devices that allow miners to escape hazardous situations; therefore, checking for damage—like cracks, corrosion, or other wear—is essential to ensure functionality when needed most.

Familiarity with what self-rescue equipment looks like and how it should function allows individuals to identify any potential issues before entering the mine, enhancing overall safety. By making it a prerequisite to check this equipment, the mining regulations aim to mitigate risk and promote preparedness among all underground personnel.