(1)After a shot has been fired, no person other than the shotfirer or any other person shall enter the place until the area is free from dust, smoke or fumes:Provided that the shotfirer shall before any other person enters the place, make a careful examination and with his assistants, if any, make the place safe.(2)No other person shall enter the place, and where guards have been posted, they shall not be withdrawn, until the examination has been made and the place has been declared safe in all respects.(3)In the case of opencast working, after shots have been fired, an all-clear signal shall be given except in the case of a misfire.
