law: 4. Power to fire upon persons contravening certain orders.-
  Any Magistrate or Police Officer not below the rank of Sub-Inspector or Havildar in case of the Armed Branch of the Police may, if he is of opinion that it is necessary so to do for the maintenance of public order, after giving such due warning, as he may consider necessary, fire upon, or otherwise use force, even to the causing of death, against any person who is acting in contravention of any law or order for the time being in force in the disturbed area, prohibiting the assembly of five or more persons or the carrying of weapons or of things capable of being used as weapons or of fire-arms, ammunition or explosive substances.