(a) The underlying principle of mens-rea is expressed in the familiar Latin maxim — 'actus non-facit reum nisi mens sit rea,' –…

(a) The maxim actus non facit reum nisi mens sit rea means that an act alone does not make a person guilty unless it is done with a guilty mind. Criminal liability normally requires both a prohibited act (actus reus) and a blameworthy mental state (mens rea).

How the codes build it in

• The IPC, and now the Bharatiya Nyaya Sanhita, 2023 (BNS), build mens rea into the definitions of offences, using words such as "intentionally", "knowingly", "voluntarily", "dishonestly", "fraudulently" and "reason to believe".
• The General Exceptions exclude liability where the mind is innocent: mistake of fact (IPC Sections 76 and 79, now BNS Sections 14 and 17), accident (IPC Section 80, now BNS Section 18), and incapacity through infancy or unsoundness of mind (IPC Sections 82–84, now BNS Sections 20–22).

Decided cases

• ***R v. Prince* (1875):** the accused was convicted of taking an unmarried girl under 16 out of her father's possession even though he reasonably believed she was 18. The statute was read as excluding mens rea on age.
• ***Sherras v. De Rutzen* (1895):** Wright J. laid down the presumption that mens rea is an essential ingredient of every offence, unless the statute displaces it. A publican who served liquor to a constable he did not know to be on duty was acquitted.
• ***Nathulal v. State of M.P.* (1966):** the Supreme Court held that mens rea is an essential ingredient of a criminal offence unless the statute excludes it expressly or by necessary implication. A dealer who stored grain believing his licence application was pending was acquitted.
• ***State of Maharashtra v. M.H. George* (1965):** mens rea was held excluded by necessary implication in a foreign-exchange offence (carrying gold). Similarly, Ranjit D. Udeshi v. State of Maharashtra (1965) held that knowledge of obscenity is not required for the offence of selling an obscene book.

Conclusion: mens rea is the general rule. Strict or absolute liability is the exception, found mainly in regulatory and public-welfare statutes such as those on food adulteration, economic offences and environmental protection, where the object of the law would otherwise be defeated.

(b) Definition. Section 120A of the IPC, now Section 61(1) of the BNS, defines criminal conspiracy as an agreement between two or more persons to do, or cause to be done:

• an illegal act; or
• a lawful act by illegal means.

An agreement to commit an offence is itself a conspiracy. For an agreement to do other illegal acts, some act must also be done in pursuance of it. Section 120B of the IPC, now Section 61(2) of the BNS, prescribes punishment. For a conspiracy to commit a serious offence, the conspirator is punished as an abettor of that offence.

Principles

• The agreement is the gist of the offence. It may be proved by circumstantial evidence and inferred from conduct (Kehar Singh v. State (Delhi Admn.) (1988); Yash Pal Mittal v. State of Punjab (1977)). At least two persons are required: one person cannot conspire alone, so if a co-accused is acquitted the charge may fail (Topandas v. State of Bombay (1956)).
• Liability for the acts of co-conspirators.
• Each conspirator is liable for the acts of the others done in furtherance of the common object, even without personal participation in the offence itself.
• Not every conspirator needs to know all the details or all the other members (State through Superintendent of Police, CBI/SIT v. Nalini (1999), the Rajiv Gandhi assassination case).
• Under Section 10 of the Indian Evidence Act, now Section 8 of the Bharatiya Sakshya Adhiniyam, anything said, done or written by one conspirator in reference to the common intention is relevant against all (Mirza Akbar v. King-Emperor (1940, PC)).
• Continuing offence: the conspiracy continues until it is achieved or abandoned. It is triable in India even if the agreement was made abroad (Ajay Aggarwal v. Union of India (1993)).

Distinction from common intention (IPC Section 34, now BNS Section 3(5)):

• Section 34 requires a criminal act done by several persons, with some participation by each (Barendra Kumar Ghosh v. King-Emperor (1925)). It lays down a rule of joint liability, not a separate offence.
• Conspiracy is a substantive offence, complete on agreement, and does not require participation in the act.

Conclusion: the statement is correct. Conspiracy law reaches the planners who stay behind the scenes, but courts insist on clear proof of the agreement, to avoid guilt by association.

(c) Section 304A of the IPC, now Section 106(1) of the BNS, punishes causing death by any rash or negligent act not amounting to culpable homicide. Under the IPC the maximum was 2 years; the BNS raises it to 5 years.

• Under the BNS, a registered medical practitioner is liable to up to 2 years.
• Section 106(2) prescribes up to 10 years for rash or negligent driving where the driver escapes without reporting. Its enforcement has been kept in abeyance.

Rashness and negligence

• Rashness is acting with awareness of the risk but with the hope that harm will not follow.
• Negligence is a breach of the duty to take the care that a reasonable and prudent person would take, without adverting to the risk (Idu Beg v. Emperor (1881); Bhalchandra Waman Pathe v. State of Maharashtra (1968)).

Why the degree of negligence decides liability

• Criminal negligence must be gross. The standard is higher than for civil liability in tort.
• ***Jacob Mathew v. State of Punjab* (2005):** for doctors, only gross negligence or recklessness, not a mere error of judgment, is culpable. The Court required a credible medical opinion before prosecution.
• ***Syad Akbar v. State of Karnataka* (1979):** civil and criminal negligence differ in degree, and the maxim res ipsa loquitur cannot automatically establish criminal liability.
• **Causation (causa causans):** the death must be the direct and proximate result of the accused's act, without the intervention of another's negligence (Emperor v. Omkar Rampratap (1902); Kurban Hussein Mohammedali Rangwalla v. State of Maharashtra (1965), where death was not the direct result of the omission to provide safety measures).
• Culpable homicide: if the act is done with intention or knowledge of the likely fatal consequences, the offence rises to culpable homicide under IPC Sections 299 and 304 Part II, now BNS Sections 100 and 105 (Alister Anthony Pareira v. State of Maharashtra (2012), a drunken-driving case).

Conclusion: the degree and quality of negligence, together with a direct causal link, determine liability under Section 304A of the IPC, now Section 106 of the BNS.

(d) Article 300 makes the Union and the States liable in the same way as the Dominion and the Provinces were before the Constitution. This carried forward the pre-Constitution distinction, drawn in P. & O. Steam Navigation Co. v. Secretary of State (1861), between sovereign functions, which attract immunity, and non-sovereign functions, which do not.

Development

• ***State of Rajasthan v. Vidyawati* (1962):** the State was held liable for the rash driving of a jeep driver taking the Collector's jeep for repairs, a non-sovereign function. The Court observed that the old immunity sat ill with a welfare State.
• ***Kasturi Lal Ralia Ram Jain v. State of U.P.* (1965):** the State was held not liable when police officers misappropriated gold seized in exercise of statutory powers, because the power was sovereign. The Court urged legislation, following the Law Commission's First Report (1956).

Decline of the immunity:

• ***N. Nagendra Rao & Co. v. State of A.P.* (1994):** the sovereign/non-sovereign distinction has lost its relevance. The State is liable for the negligence of its officers in discharging statutory functions, and immunity is confined to primary, inalienable functions such as defence, legislation and the administration of justice.
• ***State of A.P. v. Challa Ramakrishna Reddy* (2000):** the State was liable for the death of an undertrial killed in jail because of police negligence. Sovereign immunity is no defence where fundamental rights are violated.
• Public-law compensation: for violations of Article 21, sovereign immunity does not apply (Rudul Sah v. State of Bihar (1983); Saheli v. Commissioner of Police (1990); Nilabati Behera v. State of Orissa (1993); D.K. Basu v. State of W.B. (1997)).

Conclusion: the observation reflects the present position. The State's vicarious liability now turns on the negligence of its functionaries, and immunity survives only for truly sovereign policy functions. A statute on State liability, as the Law Commission recommended, is still awaited.

(e) Under the Consumer Protection Act, 1986, a consumer injured by a defective product had to show a "defect" or "deficiency" and often negligence. The Consumer Protection Act, 2019 introduced a dedicated product liability regime:

• Section 2(34) defines product liability as the responsibility to compensate for any harm caused by a defective product or deficient service.
• Chapter VI (Sections 82–87) lays down the regime.

"Harm" includes personal injury, death, mental agony, and damage to property other than the product itself (Section 2(22)).

Who is liable

Product manufacturer (Section 84):

• liable if the product has a manufacturing defect, is defective in design, deviates from manufacturing specifications, does not conform to an express warranty, or fails to carry adequate instructions or warnings;
• liable even if it proves that it was not negligent or fraudulent in making the express warranty (Section 84(2)). This is strict liability.
• Product service provider (Section 85): liable for faulty or deficient service, inadequate instructions, or failure to conform to an express warranty.
• Product seller, including e-commerce entities (Section 86): liable where it:
• exercised substantial control over design, testing, manufacture, packaging or labelling;
• altered or modified the product;
• made its own express warranty;
• sold a product whose manufacturer is unknown or cannot be served;
• failed to exercise reasonable care or to pass on warnings.

Enforcement: the Central Consumer Protection Authority (Sections 10 and 18–22) can order recalls, refunds and penalties. For example, it acted against e-commerce platforms for selling pressure cookers that did not meet BIS standards (2022–23). The Consumer Protection (E-Commerce) Rules, 2020 impose duties on platforms.

Limits (why "seller beware" is not absolute)

• Under Section 87, liability is excluded where:
• the product was misused, altered or modified;
• warnings were given and ignored;
• the danger was obvious or commonly known;
• the product was used under the influence of alcohol or non-prescribed drugs;
• the product was an industrial input or was sold to an employer.
• Section 86 makes the seller liable only in specified situations.

Conclusion: the 2019 Act shifts the risk decisively towards manufacturers, service providers and sellers, and makes caveat venditor the governing principle. The consumer must still prove the harm and the causal link, and the statutory defences preserve a measure of consumer responsibility.