72. Before a shot is fired at a disposal site, a shotfirer shall —
(a)
check the shotfiring system or circuit to ensure that it has been connected correctly;
(b)
where electrical detonators are used, ensure that they have been correctly connected to the shotfiring system or circuit and that the shotfiring system or circuit is tested with an instrument suitable for that purpose;
(c)
where appropriate, ensure that the electrical integrity of the shotfiring system or circuit is such as to make a misfire unlikely; and