Article 20: ex post facto laws, double jeopardy and self-incrimination
Why in news: A Jammu & Kashmir and Ladakh High Court ruling reported on 20 October 2026 held preventive CrPC section 107 and 117 proceedings outside Article 20(2).
Article 20 of the Constitution shields every person in criminal law: no conviction or heavier penalty under a law made after the act, no second prosecution and punishment, and no compelled testimony against oneself. A High Court of Jammu & Kashmir and Ladakh ruling, reported on 20 October 2026, held that preventive peace-bond proceedings do not bar a later prosecution.
Syllabus: GS2 · Constitution; Prelims · Polity & Governance
Why this matters for UPSC
GS2 polity, Fundamental Rights: Prelims can ask what each clause of Article 20 bars and why Article 359 cannot suspend it; Mains, how double jeopardy and self-incrimination rules protect a fair criminal trial.
In short
Article 20 of the Constitution guards every person facing criminal law: no retrospective offence or heavier penalty, no double punishment, no compelled self-testimony; an Emergency cannot suspend it.
Article 20 is only as strong as its practice: preventive bonds must stay apart from punishment, and police questioning free of compulsion.
Why it matters
A shopkeeper who sold a product legally last year cannot be jailed because a new law bans it today, and a man already tried and punished for a theft cannot be prosecuted and punished for it again whenever an official wishes. A woman called to a police station can refuse answers that would incriminate her, and no one may drug her to make her talk. These protections matter most to people with little money or influence, who cannot fight long cases. Because no Emergency order can switch them off, they mark the floor of fair criminal justice. The open question is drawing the line between keeping the peace and punishing, so that preventive orders do not become a second penalty in disguise.
Prelims pointers
- Article 359(1A): while a suspension order operates, Part III does not limit State laws, but they lapse, to the extent of incompetency, when the order ends.
- The 'except articles 20 and 21' words in Article 359 came through section 40 of the 44th Amendment Act, 1978, effective 20 June 1979.
- CrPC section 300 Explanation (BNSS section 337): dismissal of a complaint or discharge of the accused is not an acquittal.
- CrPC section 300(3): a person convicted of hurt may later be tried for culpable homicide if the victim afterwards dies.
- CrPC section 107 (BNSS section 126): a peace bond may run for any period the Magistrate fixes, not exceeding one year.
- CrPC section 117 (BNSS section 136, which says 'child'): when the person inquired against is a minor, only the sureties execute the bond.
- Section 3(37), General Clauses Act, 1897 defines 'offence' as any act or omission made punishable by a law in force.
- The National Human Rights Commission's 2000 polygraph guidelines require the test to be recorded by an independent agency, such as a hospital, with a lawyer present.
Practise a UPSC-style question
With reference to Article 20 of the Constitution of India, consider the following statements:
1. It bars a penalty greater than the one allowed by the law in force when the offence was committed.
2. It bars a person from being prosecuted and punished for the same offence more than once.
3. A Presidential order under Article 359 during an Emergency can suspend the right to move courts to enforce it.
Which of the statements given above is/are correct?
- (a) 1 and 2 only
- (b) 2 and 3 only
- (c) 1 and 3 only
- (d) 1, 2 and 3
Show the answer
Answer: (a) 1 and 2 only
Answer: (a) 1 and 2 only. Clauses (1) and (2) say exactly this; Article 359 excepts Article 20 from suspension.
Statement 1: correct. Article 20(1) forbids a penalty greater than what the law in force at the time of the offence allowed.
Statement 2: correct. Article 20(2) says no person shall be prosecuted and punished for the same offence more than once.
Statement 3: incorrect. Article 359(1) lets the President suspend enforcement of Part III rights except Articles 20 and 21, wording added by the 44th Amendment, 1978.
Eliminate: Statement 3 is incorrect, since Articles 20 and 21 are excepted from Article 359. Out: (b), (c), (d).
Trap: Wrong scope. Article 359 does suspend most Part III rights, so a student may forget that Articles 20 and 21 are carved out.
Remember: Emergency can suspend most Fundamental Rights, never Articles 20 and 21 (44th Amendment, 1978).
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