Definition
A general exception under Section 23 BNS under which an act that would otherwise be an offence is not criminal if done in good faith for the purpose of preventing or avoiding other harm to person or property — where the harm done is not disproportionate to the harm avoided.
Section 23 BNS 2023 (formerly Section 81 IPC) provides the defence of necessity. The elements: (a) the act must be done without any criminal intention to cause harm; (b) it must be done in good faith for the purpose of preventing other harm to person or property; (c) the harm caused must not be a disproportionate means of preventing the harm avoided. Classic example: a ship's captain throws cargo overboard in a storm to prevent the ship (and persons aboard) from sinking — the cargo owner cannot charge the captain with mischief. The necessity must be genuine — not self-created. The defence is narrow: the harm threatened must be imminent, no alternative means available, and the harm caused must be less than the harm prevented.
Statutory Definition
Section 23, Bharatiya Nyaya Sanhita (BNS), 2023 (formerly Section 81 IPC): 'Nothing is an offence merely by reason of its being done with the knowledge that it is likely to cause harm, if it be done without any criminal intention to cause harm, and in good faith for the purpose of preventing or avoiding other harm to person or property.' Explanation: 'It is a question of fact in such a case whether the harm to be prevented or avoided was of such a nature and so imminent as to justify or excuse the risk of doing the act with the knowledge that it was likely to cause harm.'
Etymology & Origin
From Latin 'necessitas' (necessity, compulsion, need) from 'necesse' (necessary). In law, necessity is the compulsion of circumstances that leaves no alternative — acting as one must, not as one would choose. The maxim 'necessitas non habet legem' (necessity has no law) expresses the core concept.
Full Legal Analysis
Necessity: The Last Resort
Necessity is the law’s recognition that sometimes doing harm is the only way to prevent greater harm — and in those cases, the harm done is justified (or at least excused). From throwing cargo overboard to save a ship, to breaking a limb to save a life, to destroying one house to create a firebreak that saves ten — necessity covers the terrible choices that extreme circumstances force upon people. The law does not punish the choice made when no good choice existed.
Elements of Necessity Defence
(a) Imminence of harm: The threat must be immediate — not merely anticipated in the future. Necessity cannot be claimed for pre-emptive action against non-imminent threats. (b) No reasonable alternative: If a lawful means of avoiding the harm was available and not used, necessity fails. (c) Proportionality: The harm caused must not be disproportionate to the harm avoided — you cannot murder one person to prevent the minor injury of another and claim necessity. (d) Not self-created: A person who voluntarily placed themselves in the situation of necessity cannot claim the defence. A drunk driver who caused an accident cannot claim necessity for driving drunk to avoid a different threat.
Necessity and the Doctrine of Necessity (Constitutional)
The 'doctrine of necessity' in constitutional law (used in Pakistan during the 1958 coup and occasionally referenced in Indian administrative law) is a separate and distinct concept from the criminal law defence of necessity. The constitutional doctrine validates unconstitutional acts that were necessitated by extreme emergency — this has generally been rejected in India's constitutional framework, which has its own emergency provisions (Articles 352-360).
“Necessity is the law’s compassion for impossible choices. When someone faces a situation where every available option involves harm, and they choose the lesser harm in good faith, the law does not compound the tragedy by punishing the choice. But it is a narrow exception — not a licence to harm others whenever convenient.”
This Term in Indian Statutes
Bharatiya Nyaya Sanhita, 2023, 2023
"Nothing is an offence merely by reason of its being done with the knowledge that it is likely to cause harm, if it be done without any criminal intention to cause harm, and in good faith for the purpose of preventing or avoiding other harm to person or property."
Necessity: acting to prevent greater harm — no criminal liability if done in good faith and proportionately
