16(1)An employer shall ensure that a record is kept of all persons underground at any time.
16(2)An employer shall ensure that
(a)
a supervisor is on duty above ground whenever a person is underground, and
(b)
a supervisor checks in and checks out, or causes to be checked in and out, every person who goes underground.
16(3)Except for a person making an inspection or doing repairs or in an emergency, no person shall enter or leave an underground mine except by travelways designated for that purpose.
16(4)Where in an emergency, a person leaves an underground mine other than by a travelway designated for that purpose, the person shall immediately report to a supervisor referred to in subsection (2).