Section 36 BNS – Right of Private Defence Against Act of a Person of Unsound Mind, etc.

Every person has a natural instinct to protect themselves when danger strikes. Indian criminal law respects that instinct and turns it into a legal right. But what happens when the attacker is not a normal, responsible adult? What if the person attacking you is mentally ill, heavily intoxicated, a small child, or simply mistaken about the facts? Section 36 BNS answers this exact question. It confirms that you keep your right of private defence BNS even when the attacker cannot be punished for the act.

This article breaks down Section 36 BNS in plain language, with its meaning, essentials, illustrations, a landmark case, and a clear comparison of the old and new law.

What Does Section 36 BNS Say?

Section 36 BNS falls under the Bharatiya Nyaya Sanhita, 2023. It deals with situations where the attacker escapes criminal liability, yet the victim still faces real danger. The section states that when an act would normally be an offence, but is not an offence because of the attacker’s condition, the victim still holds the full right of private defence.

The section applies when the attacker acts due to:

Youth or want of maturity of understanding – The attacker is a child or lacks the mental maturity to understand the act.
Unsoundness of mind – The attacker suffers from a mental illness and cannot grasp what they are doing.
Intoxication – The attacker is under the influence of alcohol or drugs and behaves dangerously.
Misconception of fact – The attacker acts on a genuine but mistaken belief about the situation.

In each of these cases, the law shifts its focus. It does not ask whether the attacker is guilty. It asks only one thing: was the victim in real danger? If yes, the victim may defend themselves.

Meaning of the Right of Private Defence Under Section 36 BNS

The right of private defence allows a person to use reasonable force to protect their body, life, or property. Section 36 BNS extends this right to threats that come from people who lack criminal responsibility.

The logic is simple and fair. A knife wound from a mentally ill man hurts just as much as a knife wound from a criminal. The victim cannot pause and check the attacker’s mental state before reacting. So the law grants the same protection in both cases. This is why private defence against unsound mind and private defence against intoxicated person both fall squarely within this section.

Section 36 BNS Illustrations

The bare act attaches two clear examples. These private defence BNS illustrations make the rule easy to understand:

Illustration (a): Z, under the influence of madness, tries to kill A. Z is guilty of no offence. Even so, A has the same right of private defence that he would have if Z were sane. This is a textbook case of self-defence against mentally ill attacker.
Illustration (b): A enters a house at night that he is legally allowed to enter. Z, honestly believing A to be a burglar, attacks him. Z commits no offence because of his mistake. Yet A still keeps his full right to defend himself. This shows how misconception of fact private defence works in practice.

When Right of Private Defence Applies Under Section 36 BNS

The right does not appear in every argument or scuffle. Certain conditions decide when right of private defence applies:

Real and present danger – A genuine, reasonable fear of harm must exist. Imaginary or exaggerated fear does not count.
Immediate threat – The danger must be happening now or about to happen. A past threat gives no right.
No safe escape or public help – Where a person can easily seek help from authorities, the right narrows.
Attacker’s condition is irrelevant – The victim need not prove the attacker’s mental state. The danger alone matters.

Limits of Private Defence BNS

The right is strong, but it is never unlimited. Courts watch these limits of private defence BNS closely:

Force must stay proportionate – A person cannot answer a minor push with deadly force.
The right ends with the threat – Once the danger stops, any further force becomes revenge, not defence.
Evidence decides genuineness – Courts study the facts to confirm the threat was real and the response was necessary.
False claims fail – A person who invents a self-defence story loses the protection completely.

Case Study: James Martin v. State of Kerala

The judgment in James Martin v. State of Kerala (2004) 2 SCC 203 remains a strong reference point on private defence. A closer breakdown shows why courts still rely on it while reading Section 36 BNS.

Facts: During a Bharat Bandh (nationwide strike), James Martin kept his flour mill running. A group of activists, armed with weapons, forced their way in, demanded closure, and attacked the people inside. Martin and his father fired shots in reply, killing two attackers and injuring others.
Legal issue: Did Martin act within the right of private defence, or did he cross its limits and commit murder?
Lower courts: Both the trial court and the High Court held that he exceeded the right of private defence and convicted him.
Supreme Court ruling: The Court set the conviction aside. It found that Martin faced an immediate, armed, and unlawful threat, so his reply stayed within reasonable limits.
Key principle: The Court held that self-preservation is a basic human instinct. A person under sudden attack cannot weigh his response in “golden scales” or measure it with mathematical precision.
Link to Section 36 BNS: The case confirms that the law judges self-defence by the real danger and the surrounding circumstances, not by perfect calculation. This is the same idea that runs through Section 36 BNS, where the attacker’s condition never removes the victim’s right to act.

Case Study: Deo Narain v. State of Uttar Pradesh

The Supreme Court decision in Deo Narain v. State of Uttar Pradesh (1973) 1 SCC 347 adds a useful second angle on how far the right of private defence can go.

Facts: A violent dispute over land turned into an armed confrontation. The accused, facing an attack with a lathi aimed at his head, used a spear and caused a fatal injury.
Legal issue: Must a person wait to actually get hurt before using strong force in self-defence?
Supreme Court ruling: The Court held that a person need not wait until the blow lands. A reasonable apprehension of serious harm is enough to justify a matching response.
Link to Section 36 BNS: The principle strengthens the reading of Section 36 BNS — the right turns on genuine, immediate danger, and the person defending need not act with hesitation once that danger is clear.

Section 98 IPC vs Section 36 BNS

The law here is not new. It simply carries an old rule into a new code. The table below sets out Section 98 IPC vs Section 36 BNS:

Basis	Section 98 IPC (1860)	Section 36 BNS (2023)
Governing law	Indian Penal Code	Bharatiya Nyaya Sanhita
Core principle	Right of private defence against acts of persons of unsound mind, etc.	Same principle retained
Illustrations	Two illustrations	Same two illustrations
Focus	Danger to the victim	Danger to the victim

In short, Section 36 BNS is a direct restatement of Section 98 IPC. The wording is modernised, but the protection stays identical.

Why Section 36 BNS Matters

It protects innocent victims who face danger from people the law cannot punish.
It respects the natural instinct of self-preservation.
It balances the victim’s safety with fairness toward attackers who lack intent.
It gives clear guidance to courts through its illustrations.

Frequently Asked Questions (FAQs)

1. What does Section 36 BNS deal with? It grants the right of private defence against acts committed by persons of unsound mind, intoxicated persons, children, or persons acting under a misconception of fact.

2. Can I defend myself against a mentally ill attacker? Yes. If a real danger exists, self-defence against mentally ill attacker is fully allowed, exactly as if the attacker were sane.

3. Does the attacker need criminal intent for the right to apply? No. The right depends on the danger the victim faces, not on the attacker’s guilt.

4. Can a person use excessive force under Section 36 BNS? No. The force must remain reasonable and proportionate. Excess force removes the legal protection.

5. Which IPC section matches Section 36 BNS? Section 36 BNS replaces Section 98 of the Indian Penal Code, 1860.

Conclusion

Section 36 BNS stands as a fair and practical rule. It accepts a simple truth: danger stays dangerous no matter who creates it. Whether the threat comes from a mentally ill person, an intoxicated attacker, a child, or someone acting on a false belief, the victim keeps the right of private defence. At the same time, the law keeps this right within honest and reasonable limits, so protection never turns into revenge.