§ 30-3-109 — Check-in and check-out system

Each mine shall have a check-in and check-out system that will
identify every individual underground. An accurate record of
persons in the mine consisting of a written record or a check
board shall be kept on the surface in a place that will not be
affected in the event of an explosion. The record shall bear a
number identical to the identification check carried by the
person underground.