56(1)An employer shall ensure that an electrically powered diamond drill used underground is equipped with a properly calibrated instrument that continuously monitors for the presence and concentration of methane while the drill is being operated.

56(2)An employee operating an electrically powered diamond drill underground shall use the instrument referred to in subsection (1) to continuously monitor for the presence and concentration of methane.

56(3)An employer shall ensure that an employee who uses a pneumatic diamond drill underground is provided with and uses a hand-held methane detector that continuously monitors for the presence and concentration of methane.

56(4)An employee operating a pneumatic diamond drill underground shall use the methane detector referred to in subsection (3) to continuously monitor for the presence and concentration of methane.