Section 695(5) in Police Regulations, Bengal , 1943
(5)On the occasion of the relief of the sentries, one of the head constables of the guard shall invariably post them, except where there is only one head constable, and then the lance-naik or senior constables of the guard may be deputed to see to the relief of the sentries during the day, but never during the night. Sentries shall load and unload their muskets only under the order of the Guard Commander.
