Anantam IASPost · 14 April 2026

Article 20: Protection from Conviction — Three Fundamental Rights

Study Notes · General Studies · GS II · Indian Polity

Complete UPSC guide to Article 20 of the Constitution — three fundamental rights (no ex post facto law, no double jeopardy, no self-incrimination), scope, and key case law.

Article 20 of the Indian Constitution guarantees three fundamental rights that protect individuals from arbitrary and unjust criminal prosecution:

Article 20 — along with Article 21 (right to life and personal liberty) — cannot be suspended even during a National Emergency (after the 44th Amendment, 1978). This makes it one of the most important and robust fundamental rights in the Constitution.

For UPSC, Article 20 is essential in Polity — covering criminal law protections, rights of the accused, and constitutional jurisprudence.

Text of Article 20

20(1): No person shall be convicted of any offence except for violation of a law in force at the time of the commission of the act charged as an offence, nor be subjected to a penalty greater than that which might have been inflicted under the law in force at the time of the commission of the offence.

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20(2): No person shall be prosecuted and punished for the same offence more than once.

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20(3): No person accused of any offence shall be compelled to be a witness against himself.

Article 20(1): Protection from Ex Post Facto Law

What It Means

A person cannot be convicted for an act that was not an offence when committed. Similarly, a person cannot be given a greater punishment than what was prescribed when the act was committed.

Two Aspects

Aspect A — No retrospective criminalisation: The state cannot make something criminal retrospectively and then prosecute for acts done before the law existed.

Aspect B — No enhanced punishment retrospectively: If an act was an offence at the time of commission but with a lesser penalty, a subsequent law increasing the penalty cannot be applied retrospectively.

Essential Elements

Three conditions must be met for Article 20(1) to apply:

  1. Law in force at the time: The act must have been an offence under the law existing at the time of commission
  2. Penalty proportionate: The penalty imposed cannot exceed what was prescribed at the time of commission
  3. Applies to criminal law only: Article 20(1) applies only to criminal laws, not to civil laws

Exceptions and Clarifications

Article 20(1) does NOT prevent:

Key Case Law

Kedar Nath v. State of West Bengal (1953):

Maru Ram v. Union of India (1981):

Article 20(2): Protection from Double Jeopardy

What It Means

A person cannot be prosecuted and punished more than once for the same offence — i.e., there is no "second chance" for the state to prosecute after an acquittal or conviction.

Essential Elements

Four conditions must be met:

  1. There must be a previous prosecution
  2. And a previous punishment (or at least a prior conviction/acquittal)
  3. Same offence (same act + same legal elements)
  4. Same person (the same individual)

Critical Limitation

Article 20(2) requires BOTH prosecution AND punishment (technically, completion of a previous trial). This is called the "doctrine of autrefois convict" (previously convicted) or "autrefois acquit" (previously acquitted).

Exceptions

Article 20(2) does NOT prevent:

Distinguished from Section 300 CrPC / 216 BNSS

Article 20(2) is a constitutional right, while Section 300 of the Code of Criminal Procedure (now Section 216 BNSS) provides a statutory equivalent with some differences:

Key Case Law

Maqbool Hussain v. State of Bombay (1953):

Kalawati v. State of Himachal Pradesh (1953):

Article 20(3): Protection from Self-Incrimination

What It Means

An accused person cannot be compelled to be a witness against himself. This is a cornerstone of fair criminal trial.

Essential Elements

  1. Person must be accused — not a witness or suspect, but actually charged
  2. Cannot be compelled — coercion, threat, or force is prohibited
  3. To be a witness — includes testimony, documents, and certain actions
  4. Against himself — self-incrimination; doesn't prevent incriminating others

What Counts as "Compulsion"

The Supreme Court has held that "compulsion" includes:

But it does NOT include:

Key Case Law

Kathi Kalu Oghad v. State of Bombay (1961):

Nandini Satpathy v. P.L. Dani (1978):

Selvi v. State of Karnataka (2010):

State of Bombay v. Kathi Kalu Oghad (1961):

Protection of Article 20 During Emergency

Before the 44th Amendment (1978)

Originally, under Article 359, during a National Emergency, the President could suspend the enforcement of fundamental rights — including Article 20.

After the 44th Amendment (1978)

The 44th Amendment Act explicitly excluded Articles 20 and 21 from being suspended during Emergency:

Who Can Invoke Article 20?

Article 20 applies to:

Comparison with Other Jurisdictions

Article 20 draws from multiple constitutional traditions:

ConceptOrigin
Ex post facto law prohibitionUS Constitution (Article I, Section 9)
Double jeopardyCommon law; US 5th Amendment
Self-incriminationCommon law; US 5th Amendment

Article 20 combines all three in a single constitutional article — a distinctive Indian formulation.

Article 20 vs. Article 21

The two articles are closely related:

AspectArticle 20Article 21
FocusCriminal prosecution protectionsRight to life and personal liberty
Suspension during EmergencyCANNOT be suspended (44th Amendment)CANNOT be suspended
ScopeNarrower, specificVery broad, expanding
Judicial interpretationTraditionally narrowVast expansion through jurisprudence

Together, they form the core of rights protection in criminal matters.

UPSC Relevance

GS2 (Polity): Fundamental rights, rights of accused, criminal procedure.

GS4 (Ethics): Presumption of innocence, dignity of accused, fair trial.

Key Prelims facts: