787. Shotfirers at stratified ironstone, shale or fireclay mines.

At mines of stratified ironstone, shale or fireclay, other than a safety-lamp mine1, subject to a power of exemption2, the firing of shots by any person other than a shotfirer appointed by the manager3 or, in the case of shots fired by safety fuse other than safety fuse4 capped by a detonator5, by a person appointed to fire shots by fuse