(1) An exploder used or intended to be used for firing an explosive must be labelled with—
(a) a distinguishing serial number; and
(b) the number of detonators that can satisfactorily fire in a normal series circuit.
(2) An exploder used or intended to be used for firing an explosive must be tested to assess its proper functioning—
(a) at least every 7 days, when in use; and
(b) when used for the first time or after a period of non-use of longer than 30 days; and
(c) if the person using the exploder suspects a loss of efficiency; and
(d) if required by an inspector.