Regulation 21
No person shall use any cable for firing shells if its length is less than sixty feet.
Any person about to fire a shell shall take care to prevent the shot firing cable from making contact with any other cable or electric apparatus.
No person other than the person who is to fire the shell shall couple any shot firing cable to any shell or to shot firing apparatus.
No person about to fire a shell shall couple a shot firing cable to the shot firing apparatus unless the cable has already been coupled by him to the shell or shells.
No person shall fire a round of shells unless he has tested the circuit for continuity by means of a testing device approved by the Minister and has found it to be satisfactory. No person shall make any such test unless all persons in the vicinity have withdrawn to a place of safety and he himself has taken proper shelter.