30 CFR § 49.19
Mine emergency notification plan.
(a) Each underground mine shall have a mine rescue notification
plan outlining the procedures to follow in notifying the mine rescue
teams when there is an emergency that requires their services.
(b) A copy of the mine rescue notification plan shall be posted at
the mine for the miners' information. Where a miners' representative
has been designated, the operator shall also provide the representative
with a copy of the plan.