PART XXIX UNDERGROUND OPERATIONS — Fans
584
An employer shall ensure that
584(a)
the main fans in a mine have an automatic ventilating pressure recording device that is always operating and is monitored daily;
584(b)
a mine has a standby main fan; and
584(c)
a mine has an emergency power supply capable of running the main fans in the event the principle source of power fails.
Not legal advice. Verify the cited article against the signed agreement.