Section 703(l) in Police Regulations, Bengal , 1943
(l)(i)Escort commanders are only justified in ordering fire upon a prisoner in the event of a murderous attack by the prisoner upon any person, which cannot be -prevented by other means and which would place the person attacked in imminent danger of death or injury.(ii)The escort should be instructed that they should not fire upon a prisoner without orders from the escort commander unless obliged to do so in self-defence.(iii)When a member of an escort party discovers a prisoner attempting to escape, he shall at once raise an alarm, but shall not fire upon the escaping prisoner.