
Why You Should Start CLAT Preparation Early
If you're serious about securing a seat at a top NLU

It is about understanding how principles of law have evolved through real disputes that reached the Supreme Court of India. Every year, CLAT passages draw heavily from constitutional law, fundamental rights, and doctrines that were shaped not in Parliament, but in courtrooms.Landmark Supreme Court Judgments..
Aspect | Details |
|---|---|
Bench | 6-Judge Bench |
Petitioner | A.K. Gopalan (Communist Leader) |
Issue | Validity of detention under the Preventive Detention Act, 1950; challenged as violating Articles 19, 21, and 22 |
Key Holding 1 | Fundamental Rights operate in separate, watertight compartments (silos) — no interrelationship between Arts. 19, 21, 22 |
Key Holding 2 | "Procedure established by law" (Art. 21) = any procedure enacted by a validly passed statute, regardless of fairness/reasonableness |
Approach | Narrow, literal, compartmentalized interpretation of Fundamental Rights |
Rejected Argument | That Art. 21 procedure must also be "fair, just and reasonable" (rejected — that came later) |
Duration of Precedent | Held the field for ~28 years |
Overruled By | Maneka Gandhi v. Union of India (1978) — established interconnection of Arts. 14, 19, 21 & "fair, just, reasonable procedure" |
Significance for CLAT | Classic contrast case with Maneka Gandhi — tests evolution of Art. 21 interpretation |
Quick Memory Hooks:
"Procedure established by law" ≠ "Due process of law" (US concept)
Silos/Compartments approach
Overruled after ~28 years by Maneka Gandhi (1978)
Aspect | Details |
|---|---|
Bench | 11-Judge Bench (Narrow Majority, 6:5) |
Issue | Can Parliament amend Fundamental Rights (Part III) under Article 368? |
Key Holding | Parliament cannot amend/abridge Fundamental Rights |
Reasoning | A constitutional amendment = "law" under Article 13(2); hence must comply with Fundamental Rights |
Effect | Froze Parliament's amending power over Part III |
Overruled Earlier Rulings | Shankari Prasad (1951) & Sajjan Singh (1965) — which had held amendments were NOT "law" under Art. 13 |
Parliament's Response | 24th Constitutional Amendment (1971) — declared a constitutional amendment is not "law" under Art. 13, restoring full amending power, including over Fundamental Rights |
Significance | Set the stage for Kesavananda Bharati v. State of Kerala (1973) — birth of the Basic Structure Doctrine |
Quick Memory Hooks:
11 judges, 6:5 split
Amendment = "Law" under Art. 13 → FRs frozen
24th Amendment reversed this
Direct precursor to Kesavananda Bharati (1973)
Aspect | Details |
|---|---|
Case Name | Kesavananda Bharati v. State of Kerala |
Year | 1973 |
Bench | 13-judge bench (largest ever in SC) |
Verdict | 7:6 majority |
Chief Justice | S.M. Sikri |
Petitioner | Swami Kesavananda Bharati, head of Edneer Mutt, Kerala |
Issue | Challenge to Kerala Land Reforms Act; scope of Parliament's power to amend Fundamental Rights under Article 368 |
Key Question | Can Parliament amend any/every part of the Constitution, including Fundamental Rights? |
Held | Parliament has wide power to amend the Constitution under Article 368, but cannot alter its "Basic Structure" |
Doctrine Established | Basic Structure Doctrine |
Basic Structure Includes | Supremacy of Constitution, Rule of Law, Separation of Powers, Judicial Review, Federalism, Secularism, Sovereign democratic republic, Unity & integrity of nation, Parliamentary system, Free & fair elections (illustrative, not exhaustive) |
Cases Overruled | Golaknath v. State of Punjab (1967) partially overruled |
Significance | Limits Parliament's amending power; protects core constitutional values from being destroyed by amendment |
Later Applied In | Indira Nehru Gandhi v. Raj Narain (1975), Minerva Mills v. Union of India (1980) |
Aspect | Details |
|---|---|
Case Name | Indira Nehru Gandhi v. Raj Narain |
Citation | AIR 1975 SC 2299 |
Year | 1975 |
Context | Decided during the Emergency period |
Bench | 5-judge Constitution Bench |
Background | Raj Narain challenged PM Indira Gandhi's election victory on grounds of electoral malpractice |
Amendment Involved | 39th Constitutional Amendment |
Purpose of Amendment | Placed election disputes of PM/Speaker beyond judicial review (added Article 329A) |
Held | 39th Amendment (Art. 329A) struck down as unconstitutional |
Reason | Violated Basic Structure — damaged free & fair elections, rule of law, and separation of powers |
Doctrine Applied | Basic Structure Doctrine (from Kesavananda Bharati) |
Significance | First major real-world application of Basic Structure Doctrine; proved it had practical "teeth," not just theory |
Key Basic Structure Elements Reaffirmed | Free & fair elections, Rule of law, Judicial review, Separation of powers |
Aspect | Details |
|---|---|
Bench | 5-Judge Constitutional Bench |
Issue | Constitutional validity of the 42nd Amendment provisions |
42nd Amendment Sought To | (1) Give DPSP (Part IV) primacy over Fundamental Rights (Part III); (2) Place constitutional amendments beyond judicial review |
Key Holding 1 | Struck down clause giving DPSPs unconditional primacy over Fundamental Rights |
Key Holding 2 | Harmonious balance between Part III (Fundamental Rights) and Part IV (DPSP) is itself part of the Basic Structure |
Key Holding 3 | Limited amending power of Parliament (Art. 368) is a basic feature — it cannot be expanded into unlimited power |
Key Holding 4 | Struck down provision excluding constitutional amendments from judicial review |
Core Principle Reinforced | Judicial Review is a non-negotiable, core feature of the Basic Structure |
Builds On | Kesavananda Bharati v. State of Kerala (1973) — Basic Structure Doctrine |
Significance for CLAT | Tests understanding of Fundamental Rights vs DPSP relationship + limits on amending power |
Quick Memory Hooks:
"A limited amending power cannot be made unlimited" (famous line)
Harmony of Part III + Part IV = Basic Structure
Judicial Review = Basic Structure feature
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Point | Details |
|---|---|
Case Name | Maneka Gandhi vs Union of India |
Citation | AIR 1978 SC 597; (1978) 1 SCC 248 |
Year | 1978 |
Bench | 7-Judge Constitutional Bench |
Key Judges | M.H. Beg (CJI), Y.V. Chandrachud, P.N. Bhagwati, V.R. Krishna Iyer, N.L. Untwalia, S. Murtaza Fazal Ali, P.S. Kailasam |
Petitioner | Maneka Gandhi (journalist, wife of Sanjay Gandhi) |
Respondent | Union of India |
Facts | Govt ne bina koi reason bataye Maneka Gandhi ka passport impound kar liya tha "public interest" ke naam par, under Section 10(3)(c) of Passport Act, 1967 |
Issue | Kya "procedure established by law" (Article 21) sirf koi bhi procedure ho sakta hai, ya usko fair, just aur reasonable bhi hona chahiye? |
Article Involved | Article 21 (Right to Life & Personal Liberty), Article 14, Article 19 |
Judgment | SC ne kaha ki Article 21 ka "procedure established by law" reasonable, fair aur just hona chahiye — arbitrary nahi ho sakta |
Golden Triangle Doctrine | Article 14, 19 aur 21 ab interconnected maane gaye — koi law in teeno ko satisfy kiye bina valid nahi hogi |
Overruled | A.K. Gopalan vs State of Madras (1950) ka narrow interpretation of Article 21 |
Significance | Article 21 ka scope expand hua — Right to Life ab sirf animal existence nahi, balki dignified life ka right ban gaya |
Later Impact | Isse aage aur rights derive hue — Right to Privacy, Right to Travel Abroad, Right to Livelihood, etc. |
Aspect | Details |
|---|---|
Case Name | Olga Tellis v. Bombay Municipal Corporation |
Citation | AIR 1986 SC 180 |
Year | 1985 |
Bench | 5-judge Constitution Bench |
Also Known As | "Pavement Dwellers Case" |
Petitioners | Pavement and slum dwellers of Bombay (journalist Olga Tellis and others on their behalf) |
Issue | Whether eviction of pavement dwellers violated their Right to Life under Article 21 |
Petitioners' Argument | Right to life includes right to livelihood; eviction would deprive them of livelihood, violating Art. 21 |
Held | Right to life under Art. 21 includes right to livelihood — "no person can live without the means of living" |
But Also Held | This right is not absolute; can be curtailed by a fair, just, and reasonable procedure established by law (Art. 21 read with Art. 19) |
Final Outcome | Evictions permitted, subject to safeguards (reasonable notice, alternative provisions, etc.) |
Doctrine/Principle | Expanded interpretation of Article 21; procedural due process requirement (fair, just & reasonable) |
Significance | Landmark case widening scope of Art. 21 to include livelihood; balanced individual rights vs. public interest |
Related Cases | Maneka Gandhi v. UOI (1978) — origin of "fair, just & reasonable" procedure test |
Quick line: "Right to live includes right to livelihood — but even that right bows to fair procedure."
Aspect | Details |
|---|---|
Bench | 9-judge bench, Supreme Court of India |
Arose from | Challenges to the Aadhaar scheme |
Key Holding | Right to Privacy is a Fundamental Right |
Constitutional Basis | Article 21 (Right to Life & Personal Liberty) + other Part III freedoms |
Scope of Privacy | Informational privacy, bodily autonomy, decisional privacy |
Cases Overruled | M.P. Sharma (1954) & Kharak Singh (1962) |
Verdict | Unanimous (9-0) |
Significance | Foundation for data protection & surveillance law |
Later Impact | Paved way for Navtej Singh Johar v. UOI (decriminalizing Sec. 377) |
CLAT Relevance | Tests personal autonomy, privacy jurisprudence, constitutional interpretation |
Aspect | Details |
|---|---|
Bench | 9-Judge Constitutional Bench |
Issue | Validity of 27% OBC reservation in government jobs (Mandal Commission recommendation) |
Key Holding 1 | 27% reservation for OBCs upheld as constitutionally valid |
Key Holding 2 | Introduced the "Creamy Layer" concept — socially/economically advanced members of backward classes excluded from reservation benefits |
Key Holding 3 | Total reservations (SC + ST + OBC) should not exceed 50%, except in extraordinary circumstances |
Rationale | Balances the right to equality (Art. 14) with affirmative action (Art. 16(4)) |
Significance for CLAT | Foundation for later cases on reservation ceiling & EWS quota debate (e.g., Janhit Abhiyan v. Union of India, 2022) |
Quick Memory Hooks:
27% OBC ✅ Upheld
Creamy Layer ✅ Introduced
50% Ceiling ✅ Established
9-Judge Bench
Aspect | M. Nagaraj v. Union of India | Jarnail Singh v. Lachhmi Narain Gupta |
|---|---|---|
Citation | AIR 2007 SC 71 | (2018) 10 SCC 396 |
Year | 2006 | 2018 |
Bench | 5-judge Constitution Bench | 5-judge Constitution Bench |
Issue | Validity of 77th, 81st, 82nd & 85th Amendments enabling reservation in promotions for SC/ST | Whether "creamy layer" exclusion applies to SC/ST for promotion reservations |
Held | Upheld constitutional validity of reservation in promotions | Reaffirmed Nagaraj; "creamy layer" concept applies to SC/ST too |
Conditions Laid Down | State must collect quantifiable data on: (i) backwardness, (ii) inadequacy of representation, (iii) impact on administrative efficiency | Clarified no need for separate "backwardness" data collection for SC/ST (unlike Nagaraj's requirement) |
Key Concept | Reservation in promotion is an "enabling provision," not a fundamental right | Extended Indra Sawhney's creamy layer principle (earlier only for OBCs) to SC/ST |
Significance | Set conditions/limits on State's power to provide promotion quotas | Refined & modified Nagaraj; removed the backwardness-data requirement as it contradicted SC/ST's constitutional presumption of backwardness |
Related Doctrine | Basic Structure — equality (Art. 14, 16) balanced with reservation | Creamy layer exclusion — ensures benefits reach the truly disadvantaged within SC/ST |
Relation Between Cases | Laid foundation with strict conditions | Refined framework by removing one condition & extending creamy layer |
Quick line: "Nagaraj set the conditions, Jarnail Singh fine-tuned them by adding creamy layer to SC/ST."
Aspect | Details |
|---|---|
Case | Mohd. Ahmed Khan v. Shah Bano Begum (1985) |
Popular Name | Shah Bano Case |
Citation | 1985 SCR (3) 844 |
Bench | 5 judges (Constitution Bench) |
Issue | Whether a divorced Muslim woman is entitled to maintenance under Section 125 CrPC beyond the iddat period |
Core Holding | Section 125 CrPC is a secular provision, applicable to all citizens irrespective of religion; Shah Bano entitled to maintenance beyond iddat |
Reasoning | CrPC provision overrides personal law where there is conflict, to prevent vagrancy/destitution |
Aftermath | Political controversy → Parliament enacted Muslim Women (Protection of Rights on Divorce) Act, 1986 |
Effect of 1986 Act | Diluted judgment's effect specifically for Muslim women (shifted maintenance burden partly to Waqf Boards/relatives post-iddat) |
Significance | Cornerstone for debates on Uniform Civil Code (Art. 44), personal law vs. secular law, religious freedom vs. gender justice |
Related Later Case | Daniel Latifi v. Union of India (2001) — upheld constitutionality of 1986 Act by interpreting it harmoniously with Section 125 CrPC principles |
Aspect | Details |
|---|---|
Case | S.R. Bommai v. Union of India (1994) |
Bench | 9 judges |
Issue | Scope of President's Rule under Article 356 |
Core Holding | Art. 356 power subject to judicial review |
Floor Test | Majority to be tested on floor of House, not Governor's subjective satisfaction |
Basic Structure | Secularism affirmed as part of Basic Structure |
Significance | Landmark on federalism & Centre-State relations; checks misuse of Art. 356 |
Aspect | Details |
|---|---|
Case Name | Vishaka & Ors. v. State of Rajasthan & Ors. |
Citation | AIR 1997 SC 3011 |
Bench | J.S. Verma CJI, Sujata Manohar J., B.N. Kirpal J. |
Background Facts | Bhanwari Devi, a social worker in Rajasthan, was gang-raped for attempting to stop a child marriage; absence of workplace sexual harassment law prompted a PIL by women's groups |
Issue | Whether sexual harassment at the workplace violates fundamental rights, and whether courts can lay down guidelines absent legislation |
Constitutional Provisions Invoked | Articles 14 (Equality), 15, 19(1)(g) (Right to practise any profession), 21 (Right to Life & Personal Dignity) |
International Law Used | CEDAW (Convention on Elimination of All Forms of Discrimination Against Women) — read into domestic law via Article 51(c) & 253 |
Key Holding | Sexual harassment at workplace is a violation of fundamental rights; guidelines to have force of law until Parliament legislates |
Doctrine Applied | Judicial Activism / Guidelines under Article 32 (binding under Article 141) to fill legislative vacuum |
Vishaka Guidelines (Core Features) | 1. Duty of employer to prevent harassment 2. Definition of sexual harassment 3. Complaints Committee (headed by a woman) 4. Preventive steps & awareness 5. Third-party involvement mechanism |
Superseded By | Sexual Harassment of Women at Workplace (Prevention, Prohibition and Redressal) Act, 2013 |
Significance for CLAT | Judicial law-making, PIL jurisprudence, gender justice, use of international conventions in domestic courts, interplay between judiciary and legislature |
One-line takeaway: Vishaka shows the Supreme Court using its constitutional and international-law powers to create binding workplace-safety norms when Parliament had failed to act — a textbook case of "judicial legislation" later formalized by statute.
Aspect | Details |
|---|---|
Case Name | Navtej Singh Johar v. Union of India |
Year | 2018 |
Court | Supreme Court of India |
Bench Strength | 5-judge Constitution Bench |
Decision | Unanimous |
Provision Challenged | Section 377, Indian Penal Code (criminalized "carnal intercourse against the order of nature") |
Holding | Section 377 unconstitutional to the extent it criminalized consensual sexual conduct between adults of the same sex |
Articles Violated | Article 14 (Equality), Article 15 (Non-discrimination), Article 19 (Freedom of expression), Article 21 (Right to life, privacy & dignity) |
Case Overruled | Suresh Kumar Koushal v. Naz Foundation (2013) |
Key Precedent Relied On | K.S. Puttaswamy v. Union of India (2017) — Right to Privacy |
Core Doctrines Invoked | Constitutional morality, Doctrine of proportionality, Transformative constitutionalism, Right to dignity & autonomy |
Significance | Landmark judgment in LGBTQ+ rights jurisprudence; decriminalized consensual homosexual acts; reaffirmed evolving standards of equality and dignity |
Aspect | Details |
|---|---|
Case | Shreya Singhal v. Union of India (2015) |
Bench | 2 judges |
Issue | Constitutional validity of Section 66A, IT Act, 2000 |
Provision Challenged | Criminalized sending "offensive" messages via communication services |
Core Holding | Section 66A struck down in its entirety |
Grounds | Unconstitutionally vague; chilling effect on free speech; failed reasonable restriction test under Art. 19(2) |
Constitutional Basis | Violated Article 19(1)(a) — freedom of speech and expression |
Key Doctrines | Doctrine of vagueness, "Chilling Effect" doctrine |
Significance | Landmark on free speech in digital era; balance between speech and reasonable restrictions; relevant to social media/internet governance debates |
.
Aspect | Details |
|---|---|
Petitioner | M.C. Mehta (Environmental Lawyer) — series of PILs |
Field of Law | Environmental Law, Tort Law, Constitutional Law |
Key Case | Oleum Gas Leak Case (1986) — Shriram Foods & Fertilizers gas leak, Delhi |
Doctrine 1 | Absolute Liability — enterprises in hazardous/inherently dangerous activities are liable without any exceptions |
Contrast | Departs from Strict Liability (Rylands v. Fletcher, English case) which allowed exceptions (act of God, third-party act, etc.) |
Doctrine 2 | Polluter Pays Principle — polluter bears cost of environmental damage & remediation |
Doctrine 3 | Precautionary Principle — preventive action even before scientific certainty of harm |
Constitutional Impact | Expanded Article 21 to include Right to a Clean & Healthy Environment |
Procedural Tool | Demonstrated strength of Public Interest Litigation (PIL) as judicial activism |
Significance for CLAT | Frequently tested in combined Tort + Constitutional Law passages |
Quick Memory Hooks:
Oleum Gas Leak (1986) → Absolute Liability
No exceptions ≠ Rylands v. Fletcher (Strict Liability had exceptions)
Article 21 → Clean Environment
PIL → Judicial Activism tool
Aspect | Details |
|---|---|
Bench | 5-Judge Constitutional Bench (Unanimous) |
Issue | Title dispute over Ram Janmabhoomi–Babri Masjid land, Ayodhya |
Key Holding 1 | Disputed land handed over to a Trust for construction of a Ram Temple |
Key Holding 2 | Alternative 5-acre land to be allotted to Sunni Waqf Board for mosque construction |
Basis of Decision | Decided on possession and title (evidence law), not on religious belief |
On 1992 Demolition | Court held the demolition of Babri Masjid was unlawful |
Legal Areas Tested | Evidence Law, Property Law, Limits of Judicial Adjudication in religious-historical disputes |
Significance for CLAT | Tests ability to separate legal reasoning (title/possession) from religious/political narrative |
Quick Memory Hooks:
5 Judges, Unanimous
Title → Ram Temple Trust
5 acres → Sunni Waqf Board
Demolition (1992) = Unlawful, but didn't affect title outcome
Simply reading case names and one-line summaries will not be enough to crack CLAT’s legal reasoning section, which tests application rather than recall. Here is a more effective approach:
Understand the principle, not just the outcome. For every case, be able to state the legal principle in one sentence, independent of the specific facts. For instance, the principle from Maneka Gandhi is not “Maneka Gandhi’s passport was returned”; it is “procedure under Article 21 must be fair, just, and reasonable.”
Practice applying principles to new facts. CLAT passages will give you unfamiliar fact patterns and ask you to apply a stated principle. Practice this skill by taking each case above and inventing a new hypothetical fact situation, then asking yourself how the principle would apply.
Build thematic clusters. Group cases by theme, such as basic structure, Article 21 expansion, reservation law, gender justice, and free speech, as done in this blog. This makes revision faster and helps you cross-reference related cases during the exam.
Track how doctrines evolved over time. Notice how A.K. Gopalan was overturned by Maneka Gandhi, how Golaknath was modified by Kesavananda Bharati, and how Suresh Kumar Koushal was overruled by Navtej Singh Johar. Understanding this evolution helps you appreciate that constitutional law is a living, evolving body of interpretation, not a fixed set of rules.
Stay updated with recent developments. The Supreme Court continues to deliver judgments that build upon or refine these principles, particularly around privacy, reservation, and free speech. Make it a habit to read a good newspaper’s legal coverage or a monthly legal current affairs digest to catch new judgments as they are delivered.
Good luck with your preparation, and remember that consistent revision of these core cases, combined with regular practice of application-based questions, is the surest route to scoring well in CLAT’s legal reasoning section.
