Every legal system lets people protect themselves when danger is close at hand, and Indian criminal law is no different. A person can defend their own body, their property, and even come to the aid of others when a real threat appears. But this freedom has an edge to it. It was never meant to hand anyone a licence to attack and later call it self-defence. That is exactly where Section 37 BNS – Acts Against Which There Is No Right of Private Defence steps in, marking out the line beyond which the plea of private defence simply does not hold. The rule sits inside the Bharatiya Nyaya Sanhita, 2023 (BNS), the code that took over from the Indian Penal Code, 1860 on 1 July 2024, and it spells out the situations where a person cannot fall back on this defence at all.
Anyone reading criminal law for an exam, preparing for the judiciary, or simply curious about how far the law lets you take matters into your own hands will find these limits worth understanding. What follows is a plain-language walk through the right of private defence under BNS, the reach of Section 37 Bharatiya Nyaya Sanhita, and the practical limits of private defence in India.
What Is Section 37 BNS?
The provisions dealing with private defence run from Sections 34 to 44 of the code, and together they set out the right of private defence under BNS. The earlier sections in that block hand you the right and describe how far it stretches. Section 37 does the opposite job. It works as a brake, listing the acts and moments when no right of private defence arises, and it also fixes a ceiling on how much harm a person may cause while defending themselves.
The idea behind it is fairness on both sides. A person facing a genuine danger to life or limb keeps their protection, while officials doing their lawful work in good faith are not left exposed to needless violence dressed up as self-defence.
Text and Structure of the Provision
The section has two sub-sections, and two explanations follow them.
Sub-section (1) says there is no right of private defence:
(a) against an act which does not reasonably cause the apprehension of death or of grievous hurt, if done, or attempted to be done, by a public servant acting in good faith under colour of his office, even though that act may not be strictly justifiable by law;
(b) against an act which does not reasonably cause the apprehension of death or of grievous hurt, if done, or attempted to be done, by the direction of a public servant acting in good faith under colour of his office, even though that direction may not be strictly justifiable by law;
(c) in cases in which there is time to have recourse to the protection of the public authorities.
Sub-section (2) adds that the right of private defence never extends to causing more harm than is necessary for the purpose of defence.
The Two Explanations
Explanation 1 says a person does not lose the right of private defence against something done, or attempted, by a public servant unless he knows, or has reason to believe, that the person acting is in fact a public servant.
Explanation 2 deals with acts carried out on a public servant’s direction. Here too the right stays intact unless the person knows, or has reason to believe, that the act is being done under such direction, or unless the one acting states the authority he is acting under, or produces it in writing when asked.
Both explanations lean in the citizen’s favour. They make sure the restriction bites only when a person actually realises they are up against a public servant or someone carrying out official orders.
Private Defence Against a Public Servant: Situations With No Right of Private Defence
Strip away the legal wording and the restrictions on private defence against a public servant come down to three everyday situations.
The first involves a public servant acting directly. If such an official, working in good faith under colour of office, does or tries to do something that does not reasonably put you in fear of death or grievous hurt, you cannot claim private defence against it. That stays true even where the act is not perfectly justified in law, as long as the officer is acting honestly in the course of duty.
The second covers acts done on a public servant’s instructions. The same reasoning applies when someone acts under the lawful direction of an official who is working in good faith, provided the act does not threaten death or grievous hurt.
The third is about timing. When a person has enough time to run to the police or some other public authority for help, the law expects exactly that, rather than a private show of force. Private defence is reserved for sudden, unavoidable moments, not for settling scores that could have waited for the system.
Why Good Faith and “Colour of Office” Matter
Two phrases in the provision do a lot of the heavy lifting. “Good faith” points to an official acting honestly and without ill intent, even if a genuine mistake creeps in. “Colour of office” means the act has to be tied to the official’s position, not something done in a purely personal capacity.
Read together, they tell citizens they cannot push back against officers who are honestly doing their jobs, even when some technical slip has occurred. But the section is not a blanket shield for public servants either. The moment an official’s act reasonably makes a person fear death or grievous hurt, the ordinary right of private defence comes back to life, and the person is free to protect themselves.
The Limit on Harm: Proportionality
Sub-section (2) carries what is really the heart of the whole idea: proportionality in private defence. Even when the right is available, it cannot be stretched to inflict more harm than the situation demands. This stops a small scuffle from turning into serious or deadly violence under the excuse of protecting oneself.
Courts look hard at whether the reaction actually fit the threat. Where the response is wildly out of proportion, what began as lawful defence can quickly become an offence in its own right.
Section 37 BNS vs IPC Section 99
Put Section 37 BNS vs IPC Section 99 side by side and the picture is straightforward. The new rule is the direct heir of Section 99 of the Indian Penal Code, 1860. The wording has been carried over, the principles are the same, and only the number on the section has changed under the Bharatiya Nyaya Sanhita. Its balancing act between individual protection and respect for lawful authority is untouched. So for anyone who once leaned on IPC Section 99, the old judgments and reasoning still offer solid guidance when reading the provision today.
Old Section to New Section: IPC to BNS Mapping
Before the change, the right of private defence lived in Sections 96 to 106 of the Indian Penal Code, 1860. The BNS keeps the very same layout and shifts these into Sections 34 to 44. The rule on acts against which there is no right of private defence, once IPC Section 99, now appears as Section 37 BNS. Here is how the full private defence block maps across from the old code to the new one.
| Old Section (IPC, 1860) | New Section (BNS, 2023) | Subject |
| Section 96 | Section 34 | Things done in private defence |
| Section 97 | Section 35 | Right of private defence of the body and of property |
| Section 98 | Section 36 | Right of private defence against the act of a person of unsound mind, etc. |
| Section 99 | Section 37 | Acts against which there is no right of private defence |
| Section 100 | Section 38 | When the right of private defence of the body extends to causing death |
| Section 101 | Section 39 | When such right extends to causing any harm other than death |
| Section 102 | Section 40 | Commencement and continuance of the right of private defence of the body |
| Section 103 | Section 41 | When the right of private defence of property extends to causing death |
| Section 104 | Section 42 | When such right extends to causing any harm other than death |
| Section 105 | Section 43 | Commencement and continuance of the right of private defence of property |
| Section 106 | Section 44 | Right of private defence against a deadly assault when there is risk of harm to an innocent person |
For students and practitioners moving between the two codes, this table is handy, because nothing of substance was dropped along the way; the provisions were simply renumbered.
Practical Significance of the Provision
Why does any of this matter in practice? Because the provision keeps two things in balance at once. It shuts the door on people who would use private defence as a cover for unwarranted violence, particularly against officials going about their duties. At the same time, it does not abandon the ordinary citizen; the right stays firmly in place wherever there is a real threat to life or a risk of grievous hurt, and public servants can be asked to show the authority they claim to act under.
For law students, judiciary aspirants, and working lawyers, getting a clear grip on Section 37 BNS – Acts Against Which There Is No Right of Private Defence really pays off, since the scope and limits of private defence turn up again and again in criminal law papers.
Conclusion
In the end, this provision draws the outer boundary of private defence within the Bharatiya Nyaya Sanhita, 2023. By naming the acts and moments where the right falls away, chiefly the good-faith actions of public servants and situations where help from the authorities was within reach, and by insisting that the harm caused stay proportionate, it keeps private defence in its proper place: a means of protection for the innocent, not a tool for aggression. That balance protects personal liberty and the authority of the State together, which is why the rule remains a cornerstone of India’s reformed criminal justice framework.
Frequently Asked Questions (FAQs)
Q1. What does Section 37 BNS deal with? It lists the acts and situations where no right of private defence exists, and it also caps the amount of harm a person may cause while defending themselves.
Q2. Which IPC section corresponds to this provision? It takes the place of Section 99 of the Indian Penal Code, 1860, carrying the old rule forward with only a change in numbering under the BNS.
Q3. Is there a right of private defence against a public servant? Usually not, as long as the officer acts in good faith under colour of office and the act does not reasonably create a fear of death or grievous hurt. If such a fear is genuine, the right returns.
Q4. What happens if there is time to approach the police? Then there is no right of private defence. When help from the authorities can be reached in time, the law expects a person to use it instead of acting on their own.
Q5. Can a person cause unlimited harm in private defence? No. Under sub-section (2), the right never covers more harm than is necessary, and the response has to match the threat.
Q6. What do the two explanations mean? They confirm that a person keeps the right of private defence unless they know, or have reason to believe, that the other side is a public servant or is acting on a public servant’s direction. Such a person may also be asked to state or produce written authority.
Q7. What is meant by “good faith” and “colour of office”? “Good faith” means acting honestly and without malice, while “colour of office” means the act is linked to the official’s position. Both have to be present for the restriction to apply.
Q8. Why is this provision important? It stops private defence from being misused against lawful authority while still shielding citizens from real threats, keeping individual rights and public order in balance.
Q9. When did the Bharatiya Nyaya Sanhita, 2023 come into force? It came into effect on 1 July 2024, replacing the Indian Penal Code, 1860.
Q10. Which sections of the BNS govern the right of private defence? Sections 34 to 44 of the BNS deal with it, and Section 37 is the one that sets out the acts against which no right of private defence is available.
