30 CFR 57.4361 - Underground evacuation drills.
(a) At least once every six months, mine evacuation drills shall be held to assess the ability of all persons underground to reach the surface or other designated points of safety within the time limits of the self-rescue devices that would be used during an actual emergency.
(1) Be held for each shift at some time other than a shift change and involve all persons underground;
(3) Include evacuation of all persons from their work areas to the surface or to designated central evacuation points.
Title 30 published on 2013-07-01
no entries appear in the Federal Register after this date.