Key Constitutional Amendments in India – Complete Guide for APSC & UPSC Aspirants

The Indian Constitution is neither rigid nor completely flexible — it occupies what its framers called a “middle position,” designed to be amended when necessary while remaining protected against hasty or destructive alterations. Since January 26, 1950, when the Constitution came into force, India’s Parliament has exercised its amendment power 106 times — shaping the course of Indian democracy, governance, and individual rights through each successive change.

For every APSC CCE and UPSC CSE aspirant, constitutional amendments are not optional reading — they are a core examination topic that appears consistently across Prelims MCQs, Mains GS Paper II answers, and Interview discussions. Understanding not just what was amended but why it was amended, what problem it solved, and what controversy it generated is the difference between a factual answer and an analytical one that earns full marks.

This article by Smart IAS Foundation gives you the complete picture — Article 368 explained, all three types of amendments with examples, every important amendment from the 1st to the 106th with exam-relevant analysis, the Basic Structure Doctrine with the landmark Supreme Court cases that shaped it, limitations on Parliament’s amendment power, the full procedure step by step, and practice MCQs with explanations.

Last Updated: April 25, 2026 | Relevant for APSC CCE 2025 Prelims (July 5, 2026) and UPSC CSE 2026

1. What is a Constitutional Amendment? – Article 368 Explained

A constitutional amendment is any formal change made to the text of the Constitution — whether it involves adding a new provision, modifying an existing one, substituting one clause for another, or deleting a provision that is no longer relevant or desirable. In essence, it is how the Constitution evolves alongside the nation it governs.

In India, this power is granted under Article 368, which sits in Part XX of the Constitution under the heading “Power of Parliament to Amend the Constitution and Procedure Therefor.” Article 368 lays down two things simultaneously: the power to amend and the procedure by which that power must be exercised.

The text of Article 368 specifies that Parliament may, by passing a bill in each House by the requisite majority and obtaining the President’s assent, add, vary, or repeal any provision of the Constitution. Critically, the article itself has been amended — notably by the 24th Amendment (1971), which explicitly inserted the phrase “Notwithstanding anything in this Constitution” to remove any doubt about Parliament’s authority to amend Fundamental Rights.

2. Why Constitutional Amendments Matter – For India and for Your Exam

When India’s Constituent Assembly finished drafting the Constitution in 1949, its members were acutely aware that no document written at a single point in time could perfectly anticipate every future challenge a nation of India’s diversity and complexity would face. The amendment provision was, therefore, not a loophole in the Constitution — it was a deliberate architectural feature.

The practical reasons amendments have been necessary include:

• Reorganising the country’s political geography — the reorganisation of states on a linguistic basis (7th Amendment, 1956) required extensive constitutional changes that the original text could not accommodate without amendment
• Responding to Supreme Court interpretations — several amendments were Parliament’s direct response to Supreme Court rulings that struck down legislation; the 1st, 24th, and 25th Amendments are the clearest examples of this pattern
• Expanding democratic participation — reducing the voting age from 21 to 18 (61st Amendment, 1989) and establishing Panchayati Raj as a constitutional mandate (73rd Amendment, 1992) required amendments that the original Constitution did not include
• Major economic reforms — implementing GST required the 101st Amendment (2016) to give Parliament and states concurrent power to legislate on a unified indirect tax system
• Correcting political emergencies — the 44th Amendment (1978) systematically reversed the most authoritarian provisions inserted by the 42nd Amendment during the Emergency period

For APSC and UPSC examination purposes, constitutional amendments appear in:

• Prelims — direct MCQs on which amendment did what, in which year, under which Prime Minister
• Mains GS II — analytical questions on parliamentary sovereignty vs judicial review, the Basic Structure Doctrine, and the evolution of Fundamental Rights
• Essay — governance-related essays often require examples from constitutional amendments
• Interview — questions on federalism, electoral reforms, and judicial independence frequently touch on landmark amendments

3. Three Types of Constitutional Amendments in India

Not all constitutional amendments follow the same procedure. Indian constitutional law recognises three distinct methods of amendment, differentiated by the level of consensus required — reflecting how sensitive the subject matter of the proposed change is.

4. Step-by-step Procedure for Constitutional Amendment

The amendment process under Article 368 is a defined, sequential procedure. Every step is mandatory — missing or reversing any step renders the amendment constitutionally invalid.

1. Introduction of the Bill
   The constitutional amendment bill is introduced in either the Lok Sabha or Rajya Sabha — unlike Money Bills, which must originate in the Lok Sabha. It may be introduced by a minister or a private member. There is no requirement for prior Presidential recommendation (unlike ordinary financial legislation).
2. Passage in Each House Separately
   The bill must be passed independently by each House — Lok Sabha and Rajya Sabha — by the required majority (special majority in most cases). If the two Houses disagree, there is NO provision for a joint sitting. This is a critical departure from ordinary legislation, where deadlocks between the Houses can be resolved by a joint session. A deadlock on a constitutional amendment bill means the bill fails entirely.
3. State Ratification (Where Required)
   For amendments affecting the federal structure, the bill must be ratified by the legislatures of at least half of all states (currently at least 15 of 28 states, since UTs with legislatures are not counted for this purpose). State legislatures vote by simple majority. There is no time limit within which states must ratify.
4. Presidential Assent
   After passing both Houses (and state ratification where required), the bill is sent to the President for assent. The President must give assent — the President has no power to withhold assent or return a constitutional amendment bill for reconsideration. This is a firm constitutional obligation, unlike the President’s discretion with ordinary legislation.
5. Amendment Becomes Law
   Upon receiving Presidential assent, the amendment is incorporated into the Constitution and becomes part of the supreme law of India on the date specified in the amendment or, if none is specified, on the date of Presidential assent.

5. Limitations on Parliament’s Amendment Power

Parliament’s power to amend the Constitution under Article 368, while extensive, is subject to several important constraints. These limitations have evolved through constitutional text, judicial interpretation, and democratic convention.

5.1 The Basic Structure Constraint

The most significant limitation — established by the Supreme Court in the Kesavananda Bharati case (1973) and elaborated in subsequent decisions — is that Parliament cannot use its amendment power to destroy or abrogate the Constitution’s basic structure or essential framework. This is covered in depth in Section 6 below.

5.2 Federal Structure Requirements

Amendments affecting the federal provisions of the Constitution — including the distribution of powers between the Centre and states, the powers of the Supreme Court, and the election of the President — require state ratification in addition to Parliamentary approval. This is a structural limitation that gives states a formal veto role in amendments that affect their constitutional position.

5.3 The Joint Sitting Bar

Unlike ordinary legislation, where disagreements between the Lok Sabha and Rajya Sabha can be resolved in a joint sitting under Article 108, no such mechanism exists for constitutional amendment bills. The Rajya Sabha — which gives equal representation to all states regardless of population — has an effective veto on constitutional amendments that the Lok Sabha cannot override by sheer numerical majority. This protects states’ interests in the amendment process.

5.4 Prohibition on Extending Parliamentary Terms

Parliament cannot use the amendment process to extend its own term of office beyond the constitutionally prescribed period except during a Proclamation of National Emergency. Any such extension would violate the democratic principle of regular elections and is considered part of the basic structure of the Constitution.

5.5 Abolition of Core Democratic Institutions

Parliament cannot amend the Constitution to abolish fundamental democratic institutions such as the Supreme Court, the office of the President, the Election Commission, or the institution of Parliament itself. These are so central to the constitutional framework that their elimination would amount to abrogating the Constitution rather than amending it.

6. The Basic Structure Doctrine – Origin, Cases & Key Elements

The Basic Structure Doctrine is India’s most consequential contribution to constitutional jurisprudence — a judicial principle that has been adopted or referenced by courts in Bangladesh, Pakistan, Uganda, and several other countries. Its origins lie in a decades-long conflict between Parliament and the Supreme Court over which institution had the final word on constitutional changes.

6.1 The Road to Kesavananda Bharati

The conflict began in the early 1950s when the Supreme Court, in the Shankari Prasad case (1951), held that Parliament’s power to amend the Constitution under Article 368 included the power to amend Fundamental Rights. Parliament amended with confidence. Then, in the Golaknath case (1967), a larger bench of the Supreme Court reversed this position — holding that Fundamental Rights were beyond Parliament’s amendment power. Parliament was outraged. The 24th Amendment (1971) was the direct legislative response, explicitly restoring Parliament’s power to amend any provision of the Constitution, including Fundamental Rights.

The matter came to a head in Kesavananda Bharati v. State of Kerala (1973) — a case that began as a land reform dispute but ended as the most significant constitutional judgment in Indian history. A 13-judge bench of the Supreme Court, by a narrow 7-6 majority, held that:

• Parliament does have the power to amend any provision of the Constitution, including Fundamental Rights — the 24th Amendment is valid
• But Parliament cannot use this amendment power to alter, abridge, or destroy the Constitution’s “basic structure” or essential framework

6.2 What Constitutes the Basic Structure?

The Supreme Court has never produced a single exhaustive list of what constitutes the basic structure — it has been identified incrementally across multiple cases. Currently recognised elements include:

6.3 Post-Kesavananda Developments

The Basic Structure Doctrine did not end the Parliament-Judiciary tension — it merely restructured it. The Emergency (1975–77) saw the 42nd Amendment attempt to neutralise the doctrine by inserting Clause 4 and Clause 5 into Article 368, declaring that no constitutional amendment could be questioned in any court. The Minerva Mills case (1980) struck down these clauses as themselves violating the basic structure — the doctrine had become self-protecting. The Supreme Court had effectively constitutionalised its own role as the guardian of constitutional essentials.

7. Early Phase Amendments (1951–1969)

1st Constitutional Amendment, 1951

Within just a year of the Constitution coming into force, the Supreme Court struck down several state land reform laws as violations of Fundamental Rights — specifically the right to property and the right to equality. Parliament’s response was the 1st Amendment, which made three significant changes: it added a new ground of “reasonable restrictions” on the freedom of speech and expression (allowing laws against incitement to public disorder, not just public order); it inserted the Ninth Schedule — a special schedule placing certain land reform and property laws beyond judicial review; and it validated reservations in government employment and education by adding a saving clause to Article 15 and Article 19. The 1st Amendment established the pattern of constitutional tension between parliamentary social reform and judicial protection of individual rights that would define Indian constitutional history for decades.

7th Constitutional Amendment, 1956

Implementing the recommendations of the States Reorganisation Commission, the 7th Amendment overhauled the political map of India. It abolished the classification of states into Parts A, B, C, and D, replacing them with a two-fold categorisation of States and Union Territories. It reorganised the country into 14 states and 6 Union Territories on broadly linguistic lines. For APSC aspirants, this amendment is particularly relevant because it was also the context in which Assam’s own internal reorganisation debates were sharpening — multiple communities were beginning to articulate demands for separate statehood that would eventually be addressed in later decades.

17th Constitutional Amendment, 1964

Expanded the definition of “estate” in state land reform laws to bring a wider range of land holdings under the Ninth Schedule’s protection, shielding them from judicial challenge as violations of property rights. A direct legislative response to Supreme Court rulings that had narrowed the scope of the 1st Amendment’s protections.

24th Constitutional Amendment, 1971

Directly overruling the Golaknath case (1967), this amendment made two structural changes: it amended Article 13 to make clear that nothing in it limits Parliament’s amendment power under Article 368; and it made the President’s assent to constitutional amendment bills mandatory — removing any vestigial discretion the President might have claimed. This amendment was part of the broader parliamentary assertion of sovereignty over judicial interpretation of the Constitution.

8. The 1970s – Parliament vs Judiciary (1971–1979)

25th Constitutional Amendment, 1971

Restricted the scope of the Right to Property by substituting the word “compensation” with “amount” in Article 31 — removing the requirement that the state pay market-value compensation for property acquired. It also inserted Article 31C, which protected laws implementing Directive Principles related to equal distribution of material resources and preventing concentration of wealth from being challenged on the grounds of violating Article 14 (equality) or Article 19 (freedoms). The Supreme Court later partially struck down Article 31C’s blanket immunity in the Kesavananda and Minerva Mills cases.

42nd Constitutional Amendment, 1976 — The “Mini Constitution”

The 42nd Amendment is the single most consequential and controversial amendment in India’s constitutional history. Passed during the Emergency under Prime Minister Indira Gandhi, it attempted a wholesale restructuring of the constitutional balance. Its major changes:

• Preamble changes: Inserted the words Socialist, Secular, and Integrity into the Preamble — changing “Sovereign Democratic Republic” to “Sovereign Socialist Secular Democratic Republic” and “Unity of the Nation” to “Unity and Integrity of the Nation”
• Fundamental Duties: Inserted Article 51A, adding a new Part IVA containing ten Fundamental Duties for citizens — the first time the Constitution explicitly imposed duties alongside rights
• Directive Principles strengthened: Added three new DPSPs (Articles 39A, 43A, 48A) on legal aid, workers’ participation in industry management, and environmental protection
• Judicial review curtailed: Made Article 31C’s immunity from judicial challenge available to all DPSPs — not just the two specified earlier — removing vast swathes of legislation from judicial scrutiny
• Parliament’s amendment power absolutised: Added Clauses 4 and 5 to Article 368, declaring that constitutional amendments could not be questioned in any court on any ground — an explicit attempt to nullify the Basic Structure Doctrine (later struck down in Minerva Mills, 1980)
• Anti-national activities: Inserted Article 31D giving Parliament power to legislate against anti-national activities — later omitted by the 43rd Amendment
• Administrative Tribunals: Inserted Part XIV-A (Articles 323A and 323B) on establishment of administrative and other tribunals

44th Constitutional Amendment, 1978 — Restoring Democratic Balance

The Janata Party government, formed after the Emergency ended and the Congress was defeated in the 1977 elections, used the 44th Amendment to undo the most authoritarian provisions of the 42nd Amendment and strengthen protections against future emergency misuse. Major changes:

• Right to Property: Deleted Article 19(1)(f) (the right to acquire, hold, and dispose of property) and Article 31 (compulsory acquisition with compensation), effectively removing Property from the list of Fundamental Rights. It was reconstituted as a constitutional right (not a fundamental right) under the new Article 300A — a landmark change that freed land reform legislation from fundamental rights challenges
• Emergency safeguards: Changed the ground for declaring a National Emergency from “internal disturbance” to the more precise “armed rebellion” — making it harder to misuse the Emergency provisions. Also required the Cabinet’s written advice to the President before an Emergency proclamation, and empowered the Lok Sabha to revoke an Emergency by simple majority
• Articles 20 and 21 protected during Emergency: Made the rights under Articles 20 (protection against conviction for ex post facto crimes) and 21 (right to life and personal liberty) non-suspendable even during a Proclamation of Emergency — these had been suspended under the Emergency
• Press freedom: Restored freedom of the press by removing the ability to impose precensorship except during a declared Emergency
• Article 368 partially restored: Omitted the clauses inserted by the 42nd Amendment that had placed constitutional amendments beyond judicial review (Clauses 4 and 5 of Article 368)

9. Post-Emergency and Rights Expansion Era (1978–2000)

52nd Constitutional Amendment, 1985 — Anti-Defection Law

Added the Tenth Schedule to the Constitution, popularly known as the Anti-Defection Law. This amendment addressed the chronic problem of elected representatives switching political parties — often for personal gain — thereby destabilising governments. The Tenth Schedule disqualifies a member of Parliament or state legislature from their seat if they voluntarily give up the membership of their original political party, vote against their party’s official direction in the House without prior permission, or abstain from voting against party instructions. The decision on disqualification is made by the Speaker (for Parliament) or the Speaker/Chairman of the relevant legislative house. For APSC aspirants, note that the 91st Amendment (2003) later strengthened the anti-defection provisions by removing the exception that previously protected splits involving at least one-third of a party’s legislators.

61st Constitutional Amendment, 1989 — Votes at 18

Reduced the voting age for elections to the Lok Sabha and state legislative assemblies from 21 years to 18 years by amending Article 326. The rationale was straightforward: if a person aged 18 could be conscripted into the military, marry, and enter into legal contracts, they should also have the right to participate in the political process that determines who governs them. This amendment brought approximately 50 million additional citizens into the electorate when it was passed — and has been credited with increasing youth engagement in Indian democracy.

73rd Constitutional Amendment, 1992 — Panchayati Raj

One of the most transformative amendments in India’s constitutional history, the 73rd Amendment gave constitutional status to the Panchayati Raj system — the three-tier structure of rural local self-government. Before this amendment, Panchayati Raj institutions were discretionary creatures of state legislation with no constitutional guarantee of their existence, powers, or elections. The amendment inserted Part IX and the Eleventh Schedule. Key provisions: mandatory three-tier structure (Gram Panchayat at village level, Panchayat Samiti at intermediate level, Zila Parishad at district level), regular five-year elections conducted by State Election Commissions, reservation of seats for SC, ST, and women (minimum one-third), devolution of 29 functions listed in the Eleventh Schedule, and establishment of State Finance Commissions to ensure adequate financial resources.

74th Constitutional Amendment, 1992 — Urban Local Bodies

The companion to the 73rd Amendment, the 74th Amendment inserted Part IX-A (Articles 243P to 243ZG) and the Twelfth Schedule into the Constitution, giving constitutional status to Urban Local Bodies — Municipalities, Municipal Corporations, Nagar Panchayats, and Town Panchayats. Similar to the Panchayati Raj amendment, it mandated regular elections, reservation of seats, devolution of 18 functions listed in the Twelfth Schedule, and State Finance Commission oversight. Both the 73rd and 74th Amendments are among the most frequently tested in APSC CCE examinations, particularly in the context of decentralisation and grassroots governance.

86th Constitutional Amendment, 2002 — Right to Education

Made elementary education a Fundamental Right by inserting Article 21A — declaring that the State shall provide free and compulsory education to all children between the ages of 6 and 14 years. It also amended Article 45 (substituting a new Directive Principle on early childhood care for children below six years of age) and added a new Fundamental Duty under Article 51A(k) requiring parents and guardians to provide educational opportunities for their children. The constitutional foundation laid by the 86th Amendment enabled the subsequent enactment of the Right of Children to Free and Compulsory Education Act, 2009 (RTE Act).

10. Modern Amendments (2001–2025)

91st Constitutional Amendment, 2003 — Council of Ministers and Anti-Defection

Made two significant structural changes. First, it capped the size of the Council of Ministers — at the Centre, the total number of ministers (including the Prime Minister) cannot exceed 15% of the total strength of the Lok Sabha; at the state level, the cap is 15% of the total strength of the Legislative Assembly or a minimum of 12, whichever is greater. This was a direct response to the practice of forming oversized cabinets for political management rather than governance efficiency. Second, it amended the Tenth Schedule to remove the exception that had allowed legislators to evade anti-defection disqualification if at least one-third of the party’s members split — effectively eliminating the “split” defence from the Anti-Defection Law.

97th Constitutional Amendment, 2011 — Cooperative Societies

Gave constitutional status to cooperative societies by inserting Part IX-B (Articles 243ZH to 243ZT) and adding a new Fundamental Right under Article 19(1)(c) to form cooperative societies. The amendment aims to ensure that cooperative societies function democratically, with regular elections and government-appointed directors limited to one board seat. However, the Supreme Court (in Rajendra N. Shah v. Union of India, 2021) struck down the provisions relating to state cooperatives as beyond Parliament’s legislative competence — since cooperatives fall under Entry 32 of the State List — leaving only the multi-state cooperative provisions intact.

101st Constitutional Amendment, 2016 — GST

The 101st Amendment was the legislative backbone of India’s most ambitious tax reform — the Goods and Services Tax. It inserted Article 246A giving Parliament and state legislatures concurrent power to make laws on GST; Article 269A on levy and collection of GST in inter-state trade; and Article 279A establishing the GST Council — a constitutional body composed of the Union Finance Minister (chairperson), the Union Minister of State for Finance, and the Finance Ministers of all states. The Council makes recommendations on GST rates, exemptions, thresholds, and administrative matters. The GST replaced 17 central and state taxes and over 23 cesses, creating a unified national market for the first time.

102nd Constitutional Amendment, 2018 — National Commission for Backward Classes

Gave constitutional status to the National Commission for Backward Classes (NCBC) by inserting Article 338B. Previously, the NCBC had only a statutory basis under the National Commission for Backward Classes Act, 1993. This amendment elevated it to the same constitutional plane as the National Commission for Scheduled Castes (Article 338) and the National Commission for Scheduled Tribes (Article 338A). It also inserted Article 342A, which empowers the President to specify the socially and educationally backward classes (SEBCs) in relation to a state or UT in consultation with the Governor.

103rd Constitutional Amendment, 2019 — EWS Reservation

One of the most politically significant amendments in recent years, the 103rd Amendment added Article 15(6) and Article 16(6) to the Constitution, enabling the state to provide up to 10% reservation in education and government employment for Economically Weaker Sections (EWS) of citizens — specifically those who are not covered by the existing SC, ST, and OBC reservation categories. This was the first time economic criteria alone (rather than social backwardness) were used as a constitutional basis for reservation. The Supreme Court upheld its constitutional validity in a 3:2 majority in November 2022 (Janhit Abhiyan v. Union of India), though two judges dissented on the grounds that it violated the Basic Structure’s equality principle.

104th Constitutional Amendment, 2020 — Anglo-Indian Reservation

Extended the reservation of seats for Scheduled Castes and Scheduled Tribes in the Lok Sabha and state legislative assemblies by another ten years (from 2020 to 2030). Simultaneously, it ended the provision for nominated seats for the Anglo-Indian community in Parliament and state legislatures — a provision that had been renewed every ten years since the Constitution was framed — recognising that the community’s representation needs had changed significantly since 1950.

105th Constitutional Amendment, 2021 — States’ Power to Identify OBCs

Restored the power of state legislatures and the Central Government to independently identify and maintain their own lists of socially and educationally backward classes (OBCs) for the purposes of reservations. This amendment was passed in response to the Supreme Court’s ruling in Maratha Quota Case (May 2021), which had held — based on its interpretation of the 102nd Amendment — that only the President (and Parliament through a Central List) could designate OBCs, effectively stripping state governments of this power. The 105th Amendment reversed this interpretation by amending Articles 338B and 342A to explicitly preserve the states’ legislative competence in OBC identification.

106th Constitutional Amendment, 2023 — Women’s Reservation in Parliament

One of the most historic amendments in decades, the 106th Amendment (Constitution (One Hundred and Twenty-Eighth Amendment) Bill, 2023) — also called the Nari Shakti Vandan Adhiniyam — reserved one-third of seats in the Lok Sabha, state legislative assemblies, and the Legislative Assembly of Delhi for women. Within this one-third, seats will also be reserved for women from SC and ST communities in proportion to existing SC/ST quotas. The reservation will be operative after the next delimitation exercise following the first Census after this amendment comes into force — meaning implementation is expected only after the census (delayed post-COVID) is completed and a delimitation exercise is carried out, likely making the reservation operational from 2029 onwards.

11. Constitutional Amendments Relevant to Assam – APSC Focus

Several constitutional amendments have particular significance for Assam’s political and administrative history. APSC CCE aspirants must understand these amendments not just as general constitutional knowledge but through the specific Assam lens:

For the complete constitutional framework governing Assam’s tribal areas, the Bodoland Territorial Council, and the NRC, refer to our APSC CCE Syllabus 2026 – Complete Guide which includes a dedicated Assam Polity section.

12. Practice MCQs with Explanations

These MCQs are aligned with the pattern of APSC CCE and UPSC CSE Prelims. Attempt each before reading the explanation.

13. Frequently Asked Questions – Constitutional Amendments in India

14. Conclusion

Constitutional amendments are the living record of India’s democratic evolution — each one a response to a specific challenge, a judicial decision, a social demand, or an economic imperative that the Constitution’s framers could not have fully anticipated in 1950. From the 1st Amendment’s creation of the Ninth Schedule as a shield for land reform, through the 42nd Amendment’s Emergency-era authoritarian overreach and its correction by the 44th Amendment, to the 73rd and 74th Amendments that constitutionalised grassroots democracy, and the 101st and 106th Amendments that are reshaping India’s economic and political structures in the 21st century — every amendment tells a story about how India has chosen to govern itself.

For APSC and UPSC aspirants, the goal is not to memorise amendment numbers — it is to understand the constitutional problem each amendment addressed, the judicial or political context in which it was passed, and the governance implications it created. That depth of understanding is what transforms a factual MCQ into a correct answer and a generic Mains answer into an analytical one that earns distinction marks.