A shotfirer using exploders must ensure that—
(a) an exploder used for electrical firing is of a kind suitable for use with the particular kind of detonator and size of firing circuit; and
(b) the size of the firing circuit does not exceed the capacity of the exploder; and
(c) the exploder is fitted with a device that, by its removal, renders the exploder inoperable; and
(d) the device mentioned in paragraph (c) is, while the exploder is not being used to fire explosives—
(i) out of the exploder; and
(ii) in the shotfirer's possession and control while the shotfirer is on duty; and
(e) that any exploder, when not in use, is stored in a clean area that is free from moisture, oil and other contaminants.