any other public emergency may not be invoked to justify any departure from these basic principles. "Special provisions "9. Law enforcement officials shall not use firearms against persons except in self-defence or defence of others against the imminent threat of death or serious injury, to prevent the perpetration of a particularly serious crime involving grave threat to life and public safety, to arrest a person presenting such a danger and resisting or attacking their authority, or to prevent his or her escape, and only when less extreme means are insufficient to achieve these objectives. In any event, intentional lethal use of firearms may only be made when strictly unavoidable in order to protect life. "10. In the circumstances provided for under principle 9, law enforcement officials shall identify themselves as such and give a clear warning of their intent to use firearms, with sufficient time for the warning to be observed, unless to do so would unduly place the law enforcement officials at risk or would create a risk of death or serious harm to other persons, or would be clearly inappropriate or pointless in the circumstances of the incident. "11. Rules and regulations on the use of firearms by law enforcement officials should include guidelines that: "(a) Specify the circiunstances under which law enforcement officials are authorized to carry firearms and prescribe the types of firearms and ammunition permitted; "(b) Ensure that firearms are used only in appropriate circumstances and in a manner likely to decrease the risk of unnecessary harm; "(c) Prohibit the use of those firearms and ammunition that cause unwarranted injury or present an unwarranted risk; "(d) Regulate the control, storage and issuing of firearms, including procedures for ensuring that law enforcement officials are accountable for the firearms and ammunition issued to them;
**Analysis**
The text appears to be a set of guidelines or principles for the use of firearms by law enforcement officials. It emphasizes the importance of minimizing harm and ensuring the safety of all parties involved. The text does not seem to be related to any specific economic or industrial activity, nor does it focus on a particular sector or field. Instead, it appears to be a general principle aimed at promoting responsible use of firearms.

**Category**
Humanitarian aid and relief, Law and order