Doli Incapax and the Age of Criminal Responsibility: Sections 20 and 21 BNS

The criminal law does not treat a five year old the same as a fifty year old. Between them lies a doctrine as old as Roman law: doli incapax, incapable of guilt. A child below a certain age is treated as incapable of forming the mens rea that criminal responsibility requires. Above that age, but still under twelve, the child is treated as capable in principle but presumed incapable in fact, and the presumption can be rebutted only by clear evidence of maturity. The Bharatiya Nyaya Sanhita, 2023, carries this two-tier framework forward in Sections 20 and 21, unchanged in substance from Sections 82 and 83 IPC. This module walks through the doctrine, the statutory provisions, and the interaction with the Juvenile Justice (Care and Protection of Children) Act, 2015.

1. Meaning and Concept

Doli incapax and doli capax

Doli incapax: incapable of guilt.

The Latin phrase captures the doctrinal position of a child too young to form the mens rea that the criminal law requires. Its opposite is doli capax, capable of guilt. The line between the two ages, and the presumptions that operate between them, is what the doctrine of doli incapax concerns. Every legal system that recognises mens rea has a version of this doctrine.

The two tier framework in Indian law

Rationale of the exception

• Absence of moral development. A young child does not have the moral understanding needed to grasp the wrongness of criminal conduct.
• Absence of mens rea. Without a developed sense of right and wrong, the child cannot form the intention, knowledge or recklessness that most offences require.
• Vulnerability. Even where a child could theoretically form the required mental state, subjecting him to the criminal process would cause disproportionate harm to a person still in formation.
• Better addressed by care and protection. The state's response to a child who commits harm should be rehabilitative, not punitive. The Juvenile Justice Act, 2015, gives effect to this policy.

2. Historical Origin

Roman and canon law antecedents

Roman law recognised the doctrine of doli incapax and set the age of criminal responsibility at seven, called infantia. Between seven and puberty (twelve for girls, fourteen for boys), the child was impubes and was punishable only if capable of understanding the wrong. The canon law of the medieval church absorbed the doctrine and set the age of moral responsibility at seven, coinciding with the age at which the sacraments were administered.

English common law: the seven and fourteen thresholds

English common law inherited the Roman thresholds. A child below seven was doli incapax as a matter of law. Between seven and fourteen, the child was presumed to be doli incapax, and the presumption could be rebutted by evidence of malice, malice supplying the age. Blackstone, in the Commentaries (1765), described the doctrine at length. Sir Matthew Hale, in Pleas of the Crown (1736), had already articulated the two tier framework.

Reception into the Indian Penal Code

Macaulay adopted the two tier framework in Sections 82 and 83 IPC, but modified the upper threshold from fourteen to twelve, reflecting local social conditions. The lower threshold of seven was retained. The Bharatiya Nyaya Sanhita, 2023, retains the same thresholds in Sections 20 and 21, respectively. The Juvenile Justice Act, 2015, superimposes a separate rehabilitative regime for all children below eighteen, subject to the exception for heinous offences discussed below.

3. Statutory Provisions

Section 20 BNS (formerly Section 82 IPC)

The section is absolute. It admits of no exception. No evidence of the child's maturity, no evidence of understanding of the act, and no evidence of the gravity of the offence can render a child below seven criminally liable. The child is legally incapable of committing an offence.

Section 21 BNS (formerly Section 83 IPC)

The section creates a rebuttable presumption. The child is presumed to lack the required maturity, and the prosecution must prove otherwise to convict. The proof required is not general maturity, but maturity to judge the nature and consequences of the specific conduct on the specific occasion.

Age thresholds under IPC vs BNS

4. Section 20: Absolute Exception for Children Under Seven

Ingredients and scope

Section 20 BNS has only one ingredient: the actor was a child under seven years of age at the time of the alleged offence. Age is proved by the school certificate, the birth register entry, or medical evidence of ossification, in that order of preference. Once age is proved, no further inquiry is possible. The child cannot be convicted.

Illustrations

• A child of five picks up a firearm and fires, killing another person. No offence, however tragic the result.
• A child of six takes another child's toy without permission. No offence of theft, notwithstanding the physical act and any evidence of the child's understanding.
• A child of four sets fire to a haystack causing extensive damage. No offence of mischief or arson. The parents may be civilly liable if they were negligent in supervision, but that is a matter for the civil law.

5. Section 21: Rebuttable Presumption for Children Seven to Twelve

Ingredients and scope

Section 21 BNS applies to children above seven and under twelve. It presumes that the child has not attained sufficient maturity of understanding, and requires the prosecution to prove otherwise. The proof required is:

• Positive proof of the child's maturity. Mere absence of evidence of immaturity is not enough.
• Maturity to judge the nature and consequences of the conduct. That is, the child understood what he was doing and what would follow.
• Maturity on that occasion. General maturity is not enough; the prosecution must show that the child had the required understanding at the moment of the act.

Meaning of sufficient maturity of understanding

A child who understood all three had sufficient maturity of understanding. A child who understood only some, or none, of them did not. The court's inquiry is fact intensive and depends on the child's education, home environment, previous conduct, and the manner in which the act was carried out.

How the presumption is rebutted

Malice supplying the age is the classical common law expression. Evidence of concealment, of planning, of taking steps to avoid detection, and of understanding the risk of punishment can all support the inference of maturity. In Ulla Mahapatra v. State of Orissa, a child aged eleven had concealed himself, taken a weapon, and returned to attack the deceased in a way that suggested premeditation. The Orissa High Court held that the presumption was rebutted.

6. Interaction with the Juvenile Justice Act, 2015

The two distinct regimes

The doli incapax defence under Sections 20 and 21 BNS is a substantive criminal law defence: it determines whether an act is an offence at all. The Juvenile Justice (Care and Protection of Children) Act, 2015, is a procedural and rehabilitative regime: it determines how a child, who could otherwise be criminally responsible, is dealt with. The two regimes operate on different levels.

Juvenile in conflict with law

The Juvenile Justice Act, 2015, defines a juvenile in conflict with law as a person who has not completed eighteen years of age and is alleged or found to have committed an offence. Such a person is generally dealt with by a Juvenile Justice Board, and the emphasis is on rehabilitation rather than punishment. Institutional care is a last resort. Sections 20 and 21 BNS still apply as substantive defences within this framework.

Heinous offences and the 2015 Act reforms

Following the 2012 Delhi gang rape, in which one of the accused was a juvenile aged just under eighteen, the Juvenile Justice Act was substantially amended. Under the 2015 Act, a child aged sixteen to eighteen who is alleged to have committed a heinous offence (punishable with imprisonment for seven years or more) may, after a preliminary assessment by the Juvenile Justice Board, be tried as an adult by the Children's Court. The trial then follows the ordinary criminal procedure, but with sentencing modifications. Sections 20 and 21 BNS do not apply to a child of this age, because the child is above twelve. But the trial procedure and sentencing remain within the JJ Act framework.

7. Judicial Elaboration

Ulla Mahapatra v. State of Orissa

Krishna Bhagwan v. State of Bihar

Hiralal Mallick v. State of Bihar

Kakoo v. State of Himachal Pradesh

Recent affirmations

The doctrinal position has been affirmed repeatedly. Marsh Lyngdoh v. State of Meghalaya, and other recent High Court decisions, have reaffirmed that Section 21 BNS (formerly Section 83 IPC) requires positive proof of maturity, and that a mere absence of evidence of immaturity is not enough. The Supreme Court, in Salil Bali v. Union of India, (2013) 7 SCC 705, upheld the constitutional validity of the age thresholds against a challenge that they were too high, holding that the age of criminal responsibility is a matter of legislative policy.

8. Burden of Proof

The burden of proof is allocated as follows.

• Where the accused's age is in issue. The accused bears the burden of raising the defence and of leading evidence on age. Once age is credibly raised, the prosecution must prove otherwise beyond reasonable doubt if it seeks to prosecute the child as capable.
• Under Section 20 BNS. Once the child's age is proved to be below seven, the exception is absolute. The prosecution can lead no rebuttal evidence.
• Under Section 21 BNS. Once the child's age is proved to be between seven and twelve, the presumption of doli incapax applies. The prosecution must lead evidence of sufficient maturity of understanding, and the standard is preponderance of probabilities (Section 108 BSA and general criminal law principles).
• Where the accused claims to be a juvenile. Section 94 of the Juvenile Justice Act, 2015, sets out a hierarchy of documents for the determination of age: matriculation certificate, birth certificate, and ossification test.

9. Consolidated Landmark Judgments

• Ulla Mahapatra v. State of Orissa, AIR 1958 Ori 262. Presumption under Section 83 IPC (now Section 21 BNS) rebutted by evidence of premeditation and concealment.
• Krishna Bhagwan v. State of Bihar, AIR 1989 Pat 217. Age assessed at the time of the act, not the time of trial.
• Hiralal Mallick v. State of Bihar, (1977) 4 SCC 44. Rehabilitative approach in sentencing of children. Krishna Iyer J.
• Kakoo v. State of Himachal Pradesh, (1976) 2 SCC 215. Youth of the offender as a mitigating factor in sentencing.
• Salil Bali v. Union of India, (2013) 7 SCC 705. Constitutional validity of the age thresholds upheld.
• Subramanian Swamy v. Raju, (2014) 8 SCC 390. Definition of juvenile under the Juvenile Justice Act. Constitutional validity of the framework.
• Pratap Singh v. State of Jharkhand, (2005) 3 SCC 551. Constitution Bench. Age at the time of the offence is the determining factor.
• Arnit Das v. State of Bihar, (2000) 5 SCC 488. Age determination procedure under the Juvenile Justice Act.
• Marsh Lyngdoh v. State of Meghalaya. Reaffirmation of the requirement of positive proof of maturity under Section 83 IPC.
• Shilpa Mittal v. State of NCT of Delhi, (2020) 2 SCC 787. Interpretation of heinous offences under the JJ Act, 2015. Only offences carrying a minimum sentence of seven years qualify.

Frequently Asked Questions

What does doli incapax mean?

Doli incapax is a Latin phrase meaning incapable of guilt. It refers to the doctrine that a child below a certain age is treated as incapable of forming the mens rea that criminal responsibility requires, and is therefore not liable for criminal acts.

What is the age of criminal responsibility under the BNS?

The BNS uses two thresholds. A child below seven years is absolutely exempt under Section 20 BNS. A child between seven and twelve years is presumed exempt under Section 21 BNS, but the presumption can be rebutted by proof of sufficient maturity of understanding. Above twelve, the child is criminally capable, though the Juvenile Justice Act, 2015, governs the trial procedure.

What is the difference between Section 20 and Section 21 BNS?

Section 20 BNS is an absolute exception: no child under seven can be convicted of any offence, whatever the evidence. Section 21 BNS creates a rebuttable presumption for children between seven and twelve: the child is exempt unless the prosecution proves that he had attained sufficient maturity of understanding to judge the nature and consequences of the conduct.

How is the presumption under Section 21 BNS rebutted?

The prosecution must show, by positive evidence, that the child understood the nature of the act, its consequences, and its wrongness. Circumstantial evidence such as concealment, planning, and steps to avoid detection can support the inference of maturity. Ulla Mahapatra v State of Orissa (1958) is the leading case.

How does the Juvenile Justice Act, 2015, interact with Sections 20 and 21 BNS?

Sections 20 and 21 BNS are substantive defences that determine whether the child is criminally liable at all. The Juvenile Justice Act, 2015, is a procedural framework for how children below eighteen are dealt with once they are found to be in conflict with law. The two operate on different levels. Where Section 20 applies, there is no offence to try. Where Section 21 fails (or does not apply), the JJ Act governs the trial procedure.

Can a juvenile be tried as an adult in India?

Under the 2015 amendments to the Juvenile Justice Act, a child aged sixteen to eighteen who is alleged to have committed a heinous offence (punishable with imprisonment for seven years or more) may, after a preliminary assessment by the Juvenile Justice Board, be tried as an adult by the Children's Court. The 2012 Delhi gang rape was the immediate context for this reform. Shilpa Mittal v State of NCT of Delhi (2020) clarified the definition of heinous offences.

Related Topics on The Legal Bridge

For a fuller picture, read these companion notes on adjacent doctrines and provisions:

• General Exceptions under the BNS: the wider chapter (Sections 14 to 44) in which doli incapax sits.
• Unsoundness of Mind as General Exception: the parallel doctrine for adults incapable of forming mens rea (Section 22 BNS).
• Mens Rea in Criminal Law: the mental element that children under seven cannot form.
• Rights of the Accused: constitutional and statutory protections that apply to juveniles.