(f) No one, other than a grenadier, will interfere with the bombs and grenades.
(g) Ammunition boxes in the trenches will be examined frequently to see if the lids work easily.
6. MACHINE GUNS.—(a) The concealment and protection of machine-gun emplacements is important—for this reason, except in case of emergency, machine guns will not be fired from their regular emplacements.
(b) Unless emplacements are well concealed, guns will not be mounted except between evening and morning "stand to."
(c) Two men per detachment will always be on duty with the gun.
(d) Before dusk, while there is still sufficient light, each gun will be laid on some particular spot either in or behind the enemy's front line.
(e) Range cards will be prepared and kept with each gun.
(f) Machine guns in the front line should be reduced to a minimum sufficient to cover the front.
7. FIRING AT AEROPLANES.—Firing at aeroplanes will not be permitted except by order of an officer.
8. UNDERCUTTING TRENCH SIDES.—(a) The undercutting of trench sides to make shelters is forbidden.