Section 18 BNS 2023: Accident in Doing a Lawful Act
Section 18 of the Bharatiya Nyaya Sanhita, 2023 creates a general exception for an act that occurs by accident or misfortune while a lawful act is being done lawfully, by lawful means, without criminal intention or knowledge, and with proper care and caution.
Current legal status: The Bharatiya Nyaya Sanhita, 2023 is Act No. 45 of 2023. Section 18 forms part of Chapter III, "General Exceptions". The BNS came into force on July 1, 2024, except for Section 106(2). That exception to commencement does not affect Section 18.
Official text of Section 18, Bharatiya Nyaya Sanhita, 2023
18. Accident in doing 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.
Illustration to Section 18
A is at work with a hatchet; the head flies off and kills a man who is standing by. Here, if there was no want of proper caution on the part of A, his act is excusable and not an offence.
What Section 18 means
Section 18 protects a genuinely accidental consequence of otherwise lawful conduct. The provision does not merely ask whether the harmful result was unintended. It also requires that the underlying act was lawful, that it was performed in a lawful manner by lawful means, and that proper care and caution were exercised.
The section therefore combines the absence of criminal intention or knowledge with an objective requirement of proper care and caution. If the act was unlawful, the method was unlawful, criminal intention or knowledge was present, or proper caution was lacking, the protection of Section 18 may not be available.
Essential conditions for the Section 18 exception
- Accident or misfortune: The result must arise accidentally or through misfortune.
- No criminal intention: The person must not act with a criminal intention relating to the consequence.
- No criminal knowledge: The act must also be without the criminal knowledge contemplated by the provision.
- Lawful act: The underlying act itself must be lawful.
- Lawful manner: The lawful act must be carried out in a lawful manner.
- Lawful means: The means used to perform the act must be lawful.
- Proper care and caution: Appropriate care and caution must have been exercised in the circumstances.
Why proper care and caution matter
Proper care and caution are central to Section 18. The statutory illustration makes this explicit. The accidental detachment of the hatchet head is excusable only if there was no want of proper caution on the part of A. The protection is therefore directed at an accident occurring despite appropriate care, rather than at harm caused by carelessness.
Section 18 and criminal intention or knowledge
The wording of Section 18 requires the absence of both criminal intention and criminal knowledge. This is important because a harmful result may be unintended but still fall outside the exception if the person possessed the criminal knowledge relevant to the offence alleged.
Section 18 and nearby general exceptions
Section 18 follows Section 17, which deals with acts justified by law or acts done under a good-faith mistake of fact as to legal justification. It is followed by Section 19, which addresses acts likely to cause harm but done without criminal intent and in good faith to prevent or avoid other harm.
The broader sequence of general exceptions also includes Section 14, Section 15, Section 16, and Section 20.
Practical note: Whether Section 18 applies depends on the facts proved in the particular case, including the nature of the act, the manner and means used, the person's intention or knowledge, and whether proper care and caution were actually exercised.