(c) Commanding officers are personally responsible that no trench stores, bath mats, etc., are used as firewood.
12. COMMUNICATIONS.—(a) Artillery lines will be laid on one side of a trench. Infantry lines on the opposite side.
(b) The Infantry brigade signal officer will exercise general supervision over all lines in the brigade area, and will notify the orderly officer of the Artillery brigade when any Artillery lines require attention or relaying. He will assist the Artillery whenever it may be possible to do so.
(c) Lines will be laid as low as possible, preferably not more than 9 inches from the bottom of the trench. They will be picketed into grooves cut into the side of the trench, the pickets being securely driven in at every reentrant bend and at every 10 yards along the straight.
(d) Lines will be clearly labeled at every 100 yards and at every junction with another line.
(e) All lines will be carefully patrolled at least once daily.
(f) One telephonist will always be on duty.
(g) Telephone communication to battalion headquarters and the company on each flank will be frequently tested.
(h) All "dead" lines will be reeled up at once.
(i) Every man is to know the position of his platoon commander's shelter and the company headquarters.