60. In the event of a misfire of a shot, an operator shall ensure, as far as is reasonably practicable, that —
(a)
no person other than himself, the explosives supervisor, a shotfirer, a trainee shotfirer or any other person authorised by him enters the danger area where the shot was fired until —
(i)
a period of 30 minutes has elapsed from the time of the misfire; and
(ii)
any shotfiring apparatus has been disconnected from the shot;
(b)
appropriate steps are taken to determine the cause of, and to deal with, the misfire; and