70(1)An employer shall ensure that an underground mine is equipped with an adequate warning system to be used in an emergency.

70(2)An employer shall test the effectiveness of the warning system required under subsection (1) by conducting at least four tests every year.

70(3)The tests referred to in subsection (2) shall be spaced evenly apart from one another throughout the year and arranged so that every employee who works underground is exposed to the testing of the warning system at least once every year.

70(4)An employer shall ensure that a written report on each test is prepared as soon as possible after the test and a copy is provided forthwith to the committee and is made available to an officer on request.