General Exceptions — Mistake of Fact, Judicial Acts, Necessity (Sections 14 to 44 BNS)

Sections 14 to 44 of the Bharatiya Nyaya Sanhita, 2023 (BNS) — re-enacting Sections 76 to 106 of the Indian Penal Code, 1860 (IPC) — collect the doctrines that strip an act of its criminality. The Code's drafting strategy is one of brevity: rather than repeat in every penal section the qualifying ingredients of voluntariness, intention and absence of privilege, those negative ingredients are concentrated in this chapter and made universal by Section 3(1) BNS (formerly Section 6 IPC). Every offence in the Sanhita must be read subject to the General Exceptions.

This chapter — part of our wider IPC and BNS notes series — walks through Sections 14 to 33 BNS, covering mistake of fact, judicial acts, accident, necessity, infancy, unsoundness of mind, intoxication, consent, communication in good faith, duress, and slight harm. The right of private defence under Sections 34 to 44 BNS, by reason of its volume and importance, is examined separately in our companion private defence chapter.

Burden of proof under Section 108 BSA

The General Exceptions are negative defences that the accused must plead and prove. Section 108 of the Bharatiya Sakshya Adhiniyam, 2023 (formerly Section 105 of the Indian Evidence Act, 1872) places the burden on the accused to bring his case within any general exception. The burden is one of preponderance of probabilities, not proof beyond reasonable doubt. The Court explained the workings in Musammat Anandi (1923): although the onus lies on the accused, this does not mean that the accused must lead positive evidence; if it is apparent from the prosecution evidence itself that a general exception would apply, the presumption is removed and the Court must consider whether the evidence, taken as a whole, brings the accused within the exception.

Section 14 BNS — act bound by law

Section 14 BNS reproduces Section 76 IPC. Nothing is an offence which is done by a person who is, or who by reason of a mistake of fact and not by reason of a mistake of law in good faith believes himself to be, bound by law to do it. The classic illustration is the soldier who fires on a mob in obedience to the lawful orders of his superior, or the officer of a Court who, in execution of an order, takes the property of another believing in good faith that the order is lawful.

The provision separates two species of mistake. A mistake of fact about whether one is legally bound is excused; a mistake of law about whether the law imposes a duty is not. The distinction is captured in the Latin maxim ignorantia facti excusat, ignorantia juris non excusat. The "good faith" qualifier requires due care and attention under Section 2(11) BNS — examined in our chapter on the general definitions of Section 2 BNS. A reckless belief, or a belief reached without inquiry, will not satisfy the test. The same good-faith standard applies to the sentencing-stage discretion examined in our chapter on punishments.

Sections 15 and 16 BNS — judicial acts

Section 15 BNS (formerly Section 77 IPC) protects a Judge when acting judicially. Nothing is an offence which is done by a Judge when acting judicially in the exercise of any power which is, or which in good faith he believes to be, given to him by law. Section 16 BNS (formerly Section 78 IPC, with "Court of Justice" replaced by "Court") protects acts done in pursuance of the judgment or order of a Court while the order remains in force, even if the Court had no jurisdiction to pass it, provided the person doing the act in good faith believes the Court had jurisdiction. The two sections together build a protective shield around the judicial process: the Judge is protected by Section 15 BNS, the executor of the order by Section 16 BNS.

Section 17 BNS — justified by law

Section 17 BNS (formerly Section 79 IPC) is the symmetric counterpart of Section 14 BNS. Nothing is an offence which is done by a person who is justified by law, or who by reason of a mistake of fact in good faith believes himself to be justified by law, in doing it. The illustration is of A, who sees Z commit what appears to him to be a murder, and seizes Z and brings him before a Magistrate; A is justified by Section 35 BNSS (formerly Section 43 CrPC) in arresting Z, and is therefore protected by Section 17 BNS. The distinction between Section 14 BNS (bound by law) and Section 17 BNS (justified by law) is doctrinal: the first concerns legal obligation, the second concerns legal authority.

Section 18 BNS — accident in lawful act

Section 18 BNS (formerly Section 80 IPC) protects accident in the doing of a lawful act. Nothing is an offence which is done by accident or misfortune, and without any criminal intention or knowledge, in the doing of a lawful act in a lawful manner by lawful means and with proper care and caution. The BNS retains the substance of the IPC provision but drops the word "steam" from the illustration, reflecting modern technological context.

Four ingredients must be satisfied. The act must be lawful; it must be done in a lawful manner; it must be done by lawful means; and it must be done with proper care and caution. An act done with reasonable care which produces an unintended consequence is excused. An act done without the proper care that the situation called for is not. The classical illustration is of A who is at work with a hatchet; the head flies off and kills a person standing by; A's act is excused if he was acting with proper care, not otherwise.

Section 19 BNS — necessity

Section 19 BNS (formerly Section 81 IPC) is the necessity defence. 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. The Explanation provides that it is a question of fact in each 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.

The defence operates where the accused chooses the lesser of two evils. The Court in Southwark London Borough Council v. Williams (1971) explained the test: the accused must be confronted with grave danger; he must have no choice but to commit the lesser harm to avoid the greater; and the evil inflicted must not be disproportionate to the evil avoided. The leading case on the limits of necessity is R v. Dudley and Stephens (1884), where two shipwrecked seamen killed and ate a cabin-boy to save themselves from starvation. The Court held that necessity does not justify the killing of an innocent to save oneself; the accused were guilty of murder, although the death sentence was later commuted to six months' imprisonment. The principle is that the right to one's own life does not include the right to take another's, however dire the circumstances. The doctrinal distinction matters most when set against the offence-specific exceptions to murder, examined in our chapter on exceptions to murder under Section 101 BNS.

The English Court of Appeal in R v. Martin (1989) extended the defence to "duress of circumstances" — the defendant who drove while disqualified to take his step-son to work, in circumstances where his wife threatened suicide if he did not, was held entitled to have the defence considered by the jury. The doctrine remains exceptional. Indian Courts apply the necessity defence sparingly.

Sections 20 and 21 BNS — infancy

Section 20 BNS (formerly Section 82 IPC) provides that nothing is an offence which is done by a child under seven years of age. The provision is absolute. A child under seven is conclusively presumed incapable of forming the requisite mental element, and no evidence to the contrary is admissible. This is the doctrine of doli incapax — incapable of crime — in its strict form.

Section 21 BNS (formerly Section 83 IPC) provides that nothing is an offence which is done by a child above seven years of age and under twelve, who has not attained sufficient maturity of understanding to judge the nature and consequences of his conduct on that occasion. The provision is qualified. The presumption of doli incapax in this age band is rebuttable; the prosecution may show that the child had the requisite maturity. The burden of proof on this issue is on the prosecution; if it remains in doubt, the benefit goes to the child. The protections operate alongside the procedural framework of the Juvenile Justice (Care and Protection of Children) Act, 2015, which governs how a child in conflict with the law is dealt with even where the substantive defence under Section 21 BNS does not apply. For the wider transitional context — including how the Sanhita restructures the IPC's general part — see our introduction chapter.

Section 22 BNS — unsoundness of mind

Section 22 BNS (formerly Section 84 IPC) is the most heavily-litigated of the General Exceptions. Nothing is an offence which is done by a person who, at the time of doing it, by reason of unsoundness of mind, is incapable of knowing the nature of the act, or that he is doing what is either wrong or contrary to law. The provision is the Indian statutory expression of the M'Naghten Rules of 1843, formulated by the English judges in answer to questions put by the House of Lords following Daniel M'Naghten's acquittal of the murder of Edward Drummond.

The Supreme Court has consistently drawn the line between legal insanity and medical insanity. The Court in Bapu v. State of Rajasthan, (2007) 8 SCC 66, held that what Section 84 IPC — now Section 22 BNS — provides is the defence of legal insanity, not medical insanity. Every person suffering from a mental disease is not ipso facto exempt from criminal liability. The accused must establish that, at the moment of the act, his cognitive faculties were so impaired that he was incapable either of knowing the nature of the act, or of knowing that what he was doing was wrong or contrary to law. The Court reaffirmed the principle in Surendra Mishra v. State of Jharkhand, AIR 2011 SC 2725, and in Sudhakaran v. State of Kerala, (2010) 10 SCC 582 — the medical profession would treat the accused as a mentally sick person, but for the legal defence of insanity to succeed, the accused must prove the specific cognitive impairment that the section requires.

Three procedural points are settled. First, the burden of proof under Section 108 BSA is on the accused, but only on the balance of probabilities. Second, the Court in Apu @ Gajraj Singh v. State of Rajasthan, (2007) 8 SCC 712, held that where during the investigation the previous history of insanity is revealed, the investigating officer is duty-bound to subject the accused to medical examination and place that evidence before the Court. Failure to do so creates a serious infirmity in the prosecution case. Third, the relevant time is the time of the act. Behaviour antecedent to or subsequent to the event may be relevant in inferring the mental condition at the moment of the act, but cannot replace the inquiry directed to that moment.

The Indian law is criticised as outdated. The English law has moved beyond the strict M'Naghten test: Section 2 of the Homicide Act, 1957 introduced the partial defence of "diminished responsibility", under which an abnormality of mind that does not amount to insanity may reduce murder to manslaughter. Indian law contains no such partial defence. Where the act would otherwise be murder, the accused who fails to make out Section 22 BNS may still try to bring himself within one of the specific exceptions discussed in the distinction between culpable homicide and murder. The mere abnormality of mind, partial delusion, irresistible impulse or compulsive behaviour of a psychopath affords no protection under Section 22 BNS, since the law remains squarely based on the M'Naghten right-or-wrong test.

Sections 23 and 24 BNS — intoxication

Section 23 BNS (formerly Section 85 IPC) protects a person who, at the time of doing the act, was, by reason of intoxication, incapable of knowing the nature of the act or that what he was doing was wrong or contrary to law — provided the thing which intoxicated him was administered to him without his knowledge or against his will. The defence is narrow. Voluntary intoxication is not protected.

Section 24 BNS (formerly Section 86 IPC) deals with the converse case — the offence requiring particular intent or knowledge committed by one who is intoxicated. The provision deems the intoxicated offender to have the same knowledge as he would have had if he had not been intoxicated, unless the thing which intoxicated him was administered to him without his knowledge or against his will. The asymmetry between knowledge (always imputed) and intent (a matter of fact) is doctrinally significant: voluntary intoxication negates intent only where it is so extreme that the accused was incapable of forming any intent at all.

Sections 25 to 32 BNS — consent and related defences

Sections 25 to 32 BNS reproduce Sections 87 to 94 IPC, dealing with acts done with consent, acts done in good faith for the benefit of others, communication in good faith, and acts done under threats. Section 25 BNS provides that an act not intended and not known to be likely to cause death or grievous hurt, done by consent of a person above eighteen years, is not an offence. Section 26 BNS extends a similar protection to acts done in good faith for the benefit of the consenting person, even if death may result, provided the consent is to suffering the harm or the risk of harm.

Section 27 BNS — formerly Section 89 IPC, with "insane person" replaced by "person of unsound mind" — empowers the guardian of a child under twelve or a person of unsound mind to consent to the infliction of harm in good faith and for the benefit of the protected person. Section 28 BNS deals with consent given under fear or misconception. Section 29 BNS preserves the rule that the consent provisions do not extend to acts which are offences independently of the harm caused — for instance, sexual offences against a person under the statutory age of consent.

Section 30 BNS protects acts done in good faith for the benefit of a person without consent — the surgeon's intervention in an emergency on an unconscious patient, the rescuer's seizure of a child to save him from a bolting horse. Section 31 BNS protects communication made in good faith — the doctor's truthful disclosure to a patient that may distress him, the lawyer's advice that may discourage a client. Section 32 BNS deals with acts done under threats: an act done by a person compelled by threats which, at the time of doing it, reasonably caused him to apprehend instant death, is excused, except in cases of murder and offences against the State punishable with death. The defence is therefore unavailable to the murderer, however severe the threat.

Section 33 BNS — slight harm

Section 33 BNS (formerly Section 95 IPC) provides that nothing is an offence by reason that it causes, or that it is intended to cause, or that it is known to be likely to cause, any harm if that harm is so slight that no person of ordinary sense and temper would complain of such harm. The provision codifies the maxim de minimis non curat lex — the law does not concern itself with trifles. The application of the section is fact-sensitive; the Court must judge the harm by the standards of an ordinary person, not by the particular sensitivity of the victim.

Sections 34 to 44 BNS — private defence in outline

Sections 34 to 44 BNS — formerly Sections 96 to 106 IPC — deal with the right of private defence. The right is examined in detail in our companion chapter on Sections 34 to 44 BNS; this section provides only a brief outline to complete the picture of the General Exceptions. The Court in Jaidev v. State of Punjab, AIR 1963 SC 612, held that the common-law rule of retreat is not part of Indian law: a person attacked has every right to stand his ground and defend himself if there is no time to seek official help. The right is bounded by the requirement of reasonable apprehension, by proportionality, and by the limits set out in Section 37 BNS (formerly Section 99 IPC) — including the duty to seek protection of public authorities where there is time and opportunity to do so.

Strategic note for the practitioner and aspirant

Three propositions to take into the examination hall. First, the General Exceptions are pleaded and proved by the accused, but only on the balance of probabilities under Section 108 BSA. The standard is lower than proof beyond reasonable doubt; if the evidence as a whole — prosecution and defence — shows a reasonable probability that an exception applies, the accused is entitled to its benefit. Second, the doctrine of legal insanity under Section 22 BNS is the M'Naghten right-or-wrong test, not a medical-insanity test. The accused must prove that, at the time of the act, his cognitive faculties were so impaired that he was incapable of knowing the nature of the act or that it was wrong. Mere abnormality of mind, irresistible impulse or partial delusion is not enough. Third, voluntary intoxication is not a defence to particular knowledge, although it may negate particular intent if extreme. The architecture of Sections 23 and 24 BNS makes this asymmetry clear.

The next chapter takes up the right of private defence under Sections 34 to 44 BNS in detail, including the commencement and duration of the right, its extent against the body and against property, and the limits in Section 37 BNS. After that, we move to the law of abetment and criminal conspiracy. A section-by-section comparison with the IPC is collected in our IPC-to-BNS comparative table.

Frequently asked questions

What is the difference between Section 14 BNS and Section 17 BNS?

Section 14 BNS (formerly Section 76 IPC) protects a person who acted under the belief that he was bound by law to do the act; Section 17 BNS (formerly Section 79 IPC) protects a person who acted under the belief that he was justified by law in doing it. The first is concerned with legal obligation, the second with legal authority. Both protect mistakes of fact made in good faith but not mistakes of law: ignorantia facti excusat, ignorantia juris non excusat.

Is medical insanity the same as legal insanity under Section 22 BNS?

No. Section 22 BNS (formerly Section 84 IPC) is concerned only with legal insanity. As the Supreme Court held in Bapu v. State of Rajasthan, (2007) 8 SCC 66, every person suffering from a mental disease is not ipso facto exempt from criminal liability. The accused must establish that, at the moment of the act, his cognitive faculties were so impaired that he was incapable either of knowing the nature of the act, or of knowing that what he was doing was wrong or contrary to law. Surendra Mishra and Sudhakaran reaffirm this.

Can voluntary intoxication be a defence under the BNS?

Only in narrow circumstances. Section 23 BNS protects involuntary intoxication — where the intoxicating thing was administered without the accused's knowledge or against his will. Section 24 BNS deals with voluntary intoxication: it deems the offender to have the same knowledge as he would have had if sober. Knowledge is therefore always imputed. Intent is a matter of fact: voluntary intoxication may negate particular intent only if it was so extreme that the accused was incapable of forming any intent at all.

Is duress a defence to murder under Section 32 BNS?

No. Section 32 BNS (formerly Section 94 IPC) excuses an act done by a person compelled by threats which reasonably caused him to apprehend instant death, but expressly excludes murder and offences against the State punishable with death. The exclusion follows the common-law principle that a person should not save his own life by taking another's. The defence is also unavailable where the accused voluntarily placed himself in a situation where he was likely to be subjected to such threats.

Does necessity excuse the killing of an innocent person under Section 19 BNS?

No. The leading case is R v. Dudley and Stephens (1884), where two shipwrecked seamen killed and ate a cabin-boy to save themselves from starvation. The Court held that necessity does not justify the taking of an innocent life, however dire the circumstances. The principle survives the BNS: Section 19 BNS protects acts done to prevent or avoid greater harm, but the right to one's own life does not include the right to take another's. The defence operates within proportionality limits and excludes the killing of innocents.

Who bears the burden of proving a General Exception?

The accused, under Section 108 of the Bharatiya Sakshya Adhiniyam, 2023 (formerly Section 105 of the Evidence Act, 1872). The standard is preponderance of probabilities, not proof beyond reasonable doubt. The Court in Musammat Anandi (1923) clarified that the accused need not lead positive evidence: if the prosecution evidence itself indicates that an exception may apply, the presumption is removed and the Court must consider the evidence as a whole. The accused gets the benefit if the exception is reasonably probable.