Sources of Law in India

Learning Objectives

By the end of this page, you should be able to:

• Define "source of law" and distinguish formal sources from material sources.
• List the five major sources of Indian law and explain how each creates binding legal rules.
• Explain the doctrine of precedent (stare decisis) and how it operates under Article 141 of the Constitution.
• Distinguish custom from customary law and state the tests courts use to recognise a custom.
• Explain when courts apply equitable principles in the absence of statute.
• Identify the limited but growing role of international law in Indian courts.
• Apply these sources to a fact pattern and identify which source governs.

Quick Answer

A "source of law" is where a legal rule gets its binding authority from — the answer to "why must I obey this?" In India, the main sources are legislation (laws made by Parliament and State Legislatures), precedent/case law (binding interpretations by courts, especially the Supreme Court under Article 141), custom (long-standing community practices recognised by courts), equity (fairness-based principles filling statutory gaps), and international law (persuasive, and binding only once incorporated by legislation). Knowing the sources matters because it tells a lawyer where to look for authority, which source prevails in a conflict, and how new legal rules are validly created in a democracy governed by the rule of law.

Overview

Every legal system needs an answer to a deceptively simple question: how do we know a rule is actually "law" and not just someone's opinion about right and wrong? That answer is what jurisprudence calls the sources of law — the mechanisms and institutions that create, validate, and give binding force to legal rules.

India's legal system is a hybrid. It inherited a common-law structure from British colonial rule (precedent, equity, an adversarial court system), but it is also a modern constitutional democracy with an extensive body of codified statutory law, plus deep layers of religious and customary law governing personal matters like marriage and inheritance. Understanding sources of law means understanding how these different strands — legislation, judicial precedent, custom, equity, and international law — interact, which one wins when they conflict, and how the Constitution sits above all of them as the grundnorm (basic norm) validating the rest.

This isn't just theoretical. When you argue a case, you must show the court where your rule comes from. A rule with no traceable source is not law — it's just an argument.

Core Concepts

1. Legislation (Statutory Law)

Definition: Legislation is law deliberately enacted by a body with constitutional authority to make it — Parliament at the Union level, State Legislatures at the state level, and delegated legislation (rules, regulations) made by the executive under statutory authority.

Explanation: Legislation is the most direct and modern source of law. It is prospective (usually), written, and deliberately created through a formal procedure — introduction of a bill, debate, passage by both houses, and presidential/gubernatorial assent. Because it is codified, it is generally easier to locate and cite than custom or scattered case law. In India's civil-law-influenced system, legislation is treated as the primary source, with courts interpreting rather than creating it (in theory).

Example: The Indian Contract Act, 1872 defines what makes an agreement enforceable — offer, acceptance, consideration, and capacity. If two parties dispute whether a contract exists, the statute is the first place to look.

Real-World Example: In Maneka Gandhi v. Union of India (1978), the Supreme Court interpreted Article 21 of the Constitution — itself the supreme piece of "legislation" in the sense of being the foundational legal text — to hold that a "procedure established by law" depriving a person of personal liberty must be fair, just, and reasonable, not merely any procedure enacted by the legislature. This shows legislation (the Constitution) as the source, with the Court fleshing out its meaning.

Why It Matters: Legislation lets a democracy change the law deliberately and transparently, through elected representatives, rather than leaving law-making entirely to unelected judges or frozen customs. It is also the source most amenable to planned social reform — abolishing untouchability, criminalising dowry, or introducing new rights typically happens through statute.

Common Misunderstanding: Students often think legislation is "self-executing" — that once Parliament passes a law, its meaning is fixed and obvious. In reality, statutory language is frequently ambiguous, and courts play a large interpretive role (as in Maneka Gandhi) that can significantly reshape what a statute means in practice.

2. Precedent (Case Law / Judicial Decisions)

Definition: Precedent is the principle that a court's decision on a point of law binds courts of equal or lower rank in future cases with similar facts — the doctrine of stare decisis ("to stand by things decided").

Explanation: Article 141 of the Constitution makes law declared by the Supreme Court binding on all courts within India. The ratio decidendi (the reasoning necessary to the decision) is binding; obiter dicta (incidental remarks) are only persuasive. Precedent allows the common-law method — reasoning by analogy from past cases — to generate law incrementally, especially where legislation is silent or ambiguous.

Example: Once the Supreme Court holds that the right to a speedy trial is part of Article 21's "right to life and personal liberty," every High Court and subordinate court must follow that interpretation in later cases, even though the Constitution's text never mentions "speedy trial."

Real-World Example: In M.P. Sharma v. Satish Chandra (1954), an eight-judge bench held there was no fundamental right to privacy under the Constitution as it then stood, largely relying on the text and structure of Part III. That precedent stood for over six decades and shaped search-and-seizure jurisprudence until it was overruled by the nine-judge bench in K.S. Puttaswamy v. Union of India (2017) — itself now the binding precedent on privacy. This illustrates precedent as both a stabilising and an evolving source of law.

Why It Matters: Precedent gives predictability — lawyers can advise clients based on how courts have previously ruled — while also allowing law to adapt to new facts without waiting for the legislature to act. It bridges the gap between abstract statutory text and concrete lived disputes.

Common Misunderstanding: Many students assume every judicial pronouncement is automatically a "precedent" of equal weight. In fact, only the ratio binds, only decisions of courts of appropriate hierarchy bind lower courts, and a Supreme Court bench of larger strength can overrule an earlier bench of smaller strength (as happened with privacy law).

3. Custom / Customary Law

Definition: Custom is a rule of conduct, observed by a community over a long period, that has acquired the force of law because courts recognise it as binding, provided it meets certain legal tests.

Explanation: For a custom to be judicially recognised as law it must generally be ancient (immemorial), continuous, certain, reasonable, and not opposed to public policy or statute. Customary law is especially significant in India's personal law systems (Hindu, Muslim, tribal, and regional customs governing marriage, succession, and land use) where it often predates and sits alongside codified statute.

Example: A tribal community's traditional right to graze cattle or collect forest produce on specific land, practiced without interruption for generations, may be recognised by courts as a legally enforceable customary right even without a written title deed.

Real-World Example: In Chameli Singh v. State of Uttar Pradesh (1996), the Supreme Court held the right to shelter to be part of the right to life under Article 21, drawing implicitly on the reality of customary and traditional community claims to land and housing that formal property law had not adequately addressed. Courts have similarly recognised customary succession practices among certain communities where they satisfy the legal tests for validity.

Why It Matters: Custom keeps law connected to lived social practice, especially in a country as regionally and culturally diverse as India, where a single uniform code cannot capture every community's lived reality of family, land, and inheritance relationships.

Common Misunderstanding: Students often equate "custom" with "anything people have always done." Courts do not enforce every long-standing practice — a custom that is unreasonable, indefinite, or contrary to statute (for example, one condoning practices like sati or untouchability) will be struck down despite its antiquity.

4. Equity

Definition: Equity refers to principles of fairness and conscience that courts apply to fill gaps left by statute and common law, or to prevent rigid legal rules from producing unjust outcomes.

Explanation: Historically, equity developed in England as a supplementary system administered by the Court of Chancery to soften the harshness of rigid common-law rules. India absorbed equitable principles (like trusts, estoppel, specific performance, and injunctions) into its legal system without maintaining a separate equity court — Indian courts apply "justice, equity and good conscience" as a residual source when no statute or precedent directly governs.

Example: If a person makes a promise that another relies on to their detriment, even without a formal contract, the doctrine of promissory estoppel (an equitable principle) may prevent the promisor from going back on their word.

Real-World Example: In Badri Prasad v. Delhi Administration — a case dealing with the doctrine of estoppel — the Supreme Court examined the limits of applying estoppel against public authorities exercising statutory or public-policy functions, showing equity operating alongside, but subordinate to, statute and constitutional public interest.

Why It Matters: No legislature can anticipate every situation. Equity gives courts a principled way to reach fair results in unanticipated situations without simply making up new law arbitrarily — it must still track recognised equitable doctrines like estoppel, trusts, and unjust enrichment.

Common Misunderstanding: Students sometimes think equity means "the judge can do whatever seems fair." In reality, equity is a structured set of doctrines (estoppel, trusts, specific relief, injunctions) with their own rules and limits — it supplements, but cannot override, clear statutory provisions.

5. International Law

Definition: International law consists of treaties, conventions, and customary international norms governing relations between states and, increasingly, individuals — binding in the Indian domestic legal system only to the extent incorporated by legislation, but often used as an interpretive aid.

Explanation: India follows a "dualist" approach: a treaty India signs does not automatically become enforceable domestic law; Parliament must pass implementing legislation. However, courts frequently use international conventions (like CEDAW or the ICCPR) as interpretive guides to fill gaps in domestic statute, especially in human rights matters.

Example: International environmental principles such as the "polluter pays" principle and "precautionary principle," articulated in international declarations, have been read into Indian environmental law by the Supreme Court even without a specific enacting statute spelling them out in those words.

Real-World Example: In Vishaka v. State of Rajasthan (1997), in the complete absence of domestic legislation on workplace sexual harassment, the Supreme Court directly relied on India's obligations under the Convention on the Elimination of All Forms of Discrimination Against Women (CEDAW) to lay down binding guidelines — later codified into statute only in 2013 with the POSH Act. This is one of the clearest illustrations of international law operating as a genuine gap-filling source in Indian law.

Why It Matters: As India's economy and society globalise, international law increasingly shapes domestic standards on trade, environment, human rights, and technology — even before Parliament legislates.

Common Misunderstanding: Students often assume that ratifying a UN treaty automatically makes it enforceable Indian law. It does not — without domestic implementing legislation, international law remains persuasive rather than directly binding, unless a court chooses to read it into an existing constitutional guarantee (as in Vishaka).

Visual Learning

Key Terms

Term	Definition / Context
Source of law	The origin of a rule's binding legal authority
Stare decisis	"To stand by things decided" — the doctrine that courts follow precedent
Ratio decidendi	The binding legal reasoning necessary to a court's decision
Obiter dictum	A judge's incidental remark, not binding but persuasive
Article 141	Constitutional provision making Supreme Court's law binding on all courts
Custom	A long-standing community practice recognised as legally binding
Equity	Fairness-based principles filling gaps left by statute and precedent
Delegated legislation	Rules/regulations made by the executive under statutory authority
Dualism	The doctrine that international treaties require domestic legislation to become enforceable law
Grundnorm	The foundational norm (here, the Constitution) validating all subordinate sources of law

Common Mistakes

Mistake 1

• Misconception: All five sources of law carry equal weight, so a lawyer can pick whichever is most convenient.
• Why It's Wrong: Sources exist in a hierarchy. The Constitution is supreme; statute prevails over custom and equity where they conflict; precedent interprets and applies statute but cannot override it (subject to constitutional review); custom and equity are residual sources used only where clear law is silent.
• Correct Explanation: Always check for a governing statute or constitutional provision first, then binding precedent interpreting it, and only then turn to custom or equity as gap-fillers.

Mistake 2

• Misconception: Any judicial statement about the law is binding precedent on future courts.
• Why It's Wrong: Only the ratio decidendi of a decision by a court of appropriate hierarchy binds; obiter dicta is merely persuasive, and decisions of coordinate or lower benches do not bind higher or equal-strength benches.
• Correct Explanation: Identify the ratio, check which court decided it, and confirm no larger bench has since overruled it (as happened when Puttaswamy overruled M.P. Sharma on privacy).

Mistake 3

• Misconception: Signing an international treaty automatically makes its provisions enforceable in Indian courts.
• Why It's Wrong: India is a dualist state — treaties bind the state internationally but require domestic implementing legislation to be enforceable by individuals in Indian courts.
• Correct Explanation: International law is directly enforceable only once incorporated by statute; until then, courts may use it only as a persuasive interpretive aid, as in Vishaka.

Comparison and Connections

Source	Who Creates It	How Binding	Typical Use	Example
Legislation	Parliament / State Legislature	Directly binding once enacted	Primary rule-making, planned reform	Indian Contract Act, 1872
Precedent	Courts (esp. Supreme Court)	Binding ratio on lower/equal courts (Art. 141)	Interpreting and filling gaps in statute	Maneka Gandhi v. Union of India
Custom	Communities, over time	Binding once judicially tested and validated	Personal law, land/tribal rights	Chameli Singh v. State of U.P.
Equity	Courts, applying general principles	Binding within recognised doctrines (estoppel, trusts)	Filling statutory gaps, preventing injustice	Promissory estoppel cases
International law	States, via treaties/conventions	Persuasive unless incorporated by statute (dualism)	Human rights, environment, trade	Vishaka v. State of Rajasthan

Practice Questions

Recall

1. What are the five major sources of law recognised in the Indian legal system? Answer guidance: Legislation, precedent/case law, custom, equity, and international law.

2. Which constitutional article makes Supreme Court decisions binding on all other courts in India? Answer guidance: Article 141.

Understanding

3. Explain why only the ratio decidendi of a judgment is binding, and not the entire judgment. Answer guidance: The ratio is the legal reasoning essential to resolving the dispute; obiter dicta are incidental observations not necessary to the outcome, so binding them would let judges create sweeping rules beyond what the case required.

4. Why is India described as a "dualist" state with respect to international law? Answer guidance: Because signing/ratifying a treaty binds India internationally but does not automatically create enforceable rights for individuals domestically — Parliament must pass implementing legislation, unless courts read the treaty into an existing constitutional guarantee.

Application

5. A tribal community has grazed cattle on a forest patch for over a century without written title. A forest department now wants to evict them citing lack of documentation. Which source of law might the community invoke, and what must they prove? Answer guidance: Customary law; they must show the practice is ancient, continuous, certain, and reasonable, and not barred by statute (e.g., forest conservation law), to have it judicially recognised.

6. A statute is silent on whether a party can be held to an informal promise they relied on to their detriment. Which source of law fills this gap, and what doctrine applies? Answer guidance: Equity; the doctrine of promissory estoppel may bind the promisor even absent a formal contract.

Analysis

7. Compare how precedent functions in Maneka Gandhi v. Union of India versus M.P. Sharma v. Satish Chandra (later overruled by Puttaswamy). What does this pair of cases show about precedent as a "living" source of law? Answer guidance: Maneka Gandhi shows precedent expanding a constitutional guarantee (Article 21) through interpretation; M.P. Sharma shows a precedent that stood for decades before being overruled by a larger bench, illustrating that precedent is authoritative but not immutable — it evolves as social and constitutional understanding deepens.

8. Vishaka v. State of Rajasthan relied on international law (CEDAW) to create binding guidelines in the absence of domestic legislation. Was the Supreme Court "legislating," or exercising a legitimate judicial function? Explain using the concept of sources of law. Answer guidance: A good answer recognises the tension: strictly, law-making is the legislature's domain, but courts fill genuine statutory vacuums using constitutional interpretation and international law as an aid — this is a recognised (if debated) judicial function, later ratified by Parliament enacting the POSH Act, 2013, showing the judiciary and legislature working in sequence rather than in conflict.

FAQ

Q1: Is the Constitution itself a "source of law" or something above the sources of law? A: Both, in a sense. It is the supreme piece of legislation and also the grundnorm — the foundational norm that gives validity to all other sources (statutes must be constitutional, precedents interpret it, custom and equity operate within its limits).

Q2: If a custom conflicts with a statute, which wins? A: The statute prevails. Courts will only recognise a custom that is not inconsistent with a valid statute or public policy.

Q3: Can the Supreme Court overrule its own precedent? A: Yes, but generally only through a bench of equal or larger strength than the one that decided the earlier case — this is exactly what happened when a nine-judge bench in Puttaswamy (2017) overruled the eight-judge bench in M.P. Sharma (1954) on the right to privacy.

Q4: Why does equity matter if India has such extensive codified statutes? A: Because no code can anticipate every dispute. Equity lets courts do justice in the specific gaps statutes leave open, using established doctrines like estoppel and trusts rather than ad hoc discretion.

Q5: Does international law ever become binding in India without Parliament passing a law? A: Rarely, and indirectly — courts sometimes read international conventions into existing constitutional rights (as in Vishaka), which makes the resulting guidelines binding as constitutional interpretation, not because the treaty itself became domestic law.

Quick Revision

• Five sources: legislation, precedent, custom, equity, international law.
• Constitution is the grundnorm — validates and limits every other source.
• Legislation = law made by Parliament/State Legislatures; primary and codified.
• Precedent binds via Article 141; only the ratio decidendi binds, not obiter dicta.
• Larger Supreme Court benches can overrule smaller ones (Puttaswamy overruled M.P. Sharma on privacy).
• Custom must be ancient, continuous, certain, reasonable, and not against statute/public policy.
• Equity fills statutory gaps using doctrines like estoppel, trusts, and injunctions — not free-floating judicial discretion.
• India is "dualist": treaties don't automatically bind domestically; need implementing legislation.
• Vishaka v. State of Rajasthan used CEDAW to fill a legislative gap before the POSH Act, 2013 was passed.
• Maneka Gandhi v. Union of India shows precedent expanding the meaning of a constitutional guarantee (Article 21).
• Always check hierarchy first: Constitution → statute → binding precedent → custom/equity as residual sources.

Related Topics

Prerequisites: 1. Introduction to Jurisprudence

Related: 9. Legal Positivism, 3. Legal Reasoning, 6. Law and Society

Next: 3. Legal Reasoning