Tracing Reservations Through Case Law in India

Reservation law in India has developed through a long constitutional conversation between Parliament and the Supreme Court. The jurisprudence begins with the formal equality model of Article 15(1) and Article 16(1), moves through the constitutional acceptance of compensatory discrimination, and culminates in a more nuanced doctrine of substantive equality that now accommodates backward classes, women, horizontal reservations, reservation in promotions, educational reservations, and economically weaker sections.

Constitutional setting

The constitutional foundation of reservation lies primarily in Articles 15 and 16. Article 15(4) and Article 15(5) enable special provisions for socially and educationally backward classes, Scheduled Castes and Scheduled Tribes in education, while Article 16(4) enables reservation in public employment for backward classes not adequately represented in State services. Article 15(3) separately allows special provisions for women and children, and this has become the constitutional basis for women's reservation in several sectors.

The basic constitutional question has always been whether reservation is an exception to equality or an aspect of equality itself. Early doctrine often described reservation as a departure from the general rule of equal treatment, but later decisions, especially after State of Kerala v. N.M. Thomas (AIR 1976 SC 490), moved toward the view that affirmative action is a method of realising substantive equality rather than a mere exception to it.

The first phase: formal equality and the First Amendment

The starting point is State of Madras v. Champakam Dorairajan (AIR 1951 SC 226), where the Supreme Court struck down the Communal G.O. that distributed seats in medical colleges on communal lines. The Court held that caste and religion based allocation of educational seats violated Article 15(1), because at that time the Constitution contained no express enabling provision like Article 15(4).

The significance of Champakam lies less in its immediate holding than in its constitutional aftermath. Parliament responded through the First Constitutional Amendment, 1951, inserting Article 15(4) to enable special provisions for the advancement of socially and educationally backward classes and for Scheduled Castes and Scheduled Tribes. Reservation in education thus entered the constitutional text not as an implied judicial doctrine but as an express constitutional response to judicial insistence on formal equality.

Balaji and the early limits of backward class reservation

The first major exposition of Article 15(4) came in M.R. Balaji v. State of Mysore (AIR 1963 SC 649). Mysore had reserved 68 percent of seats in medical and engineering colleges for backward classes, more backward classes, Scheduled Castes, and Scheduled Tribes. The Supreme Court invalidated the scheme and laid down several propositions that shaped reservation doctrine for decades.

First, the Court held that caste could be a relevant factor in identifying backwardness, but it could not be the sole or dominant criterion. Secondly, the Court held that backwardness under Article 15(4) had to be both social and educational. Thirdly, it disapproved the State's broad classification that treated a very large majority of the population as backward. Most enduringly, it stated that reservation ordinarily ought to remain below 50 percent, because a special provision cannot destroy the main rule of equality.

Balaji reflects a constitutional anxiety that has never fully disappeared: the fear that compensatory discrimination may become politically overbroad and constitutionally excessive. At the same time, its insistence that caste could not be the sole basis of backwardness did not eliminate caste from reservation law; it merely required caste to be mediated through broader indicators such as occupation, poverty, and educational disadvantage.

Chitralekha, Rajendran and the caste-class debate

In Chitralekha v. State of Mysore (AIR 1964 SC 1823), the Court upheld classification based on occupation and income, even though caste was not used. The judgment established that caste is relevant but not indispensable, and that backwardness may be identified through secular indicators if the State can rationally do so.

Yet later cases recognised the social reality that, in India, caste and class often overlap. In P. Rajendran v. State of Madras (AIR 1968 SC 1012) and S.V. Balaram v. State of Andhra Pradesh AIR 1972 SC 1375, the Court accepted caste-based identification where the State had used broader material showing social and educational backwardness. The judicial position that eventually emerged was pragmatic rather than doctrinaire: caste cannot constitutionally be the sole criterion, but caste may be the starting point for identifying backward classes where social reality supports that conclusion.

This doctrinal shift matters because it explains the eventual holding in Indra Sawhney. The Court never fully accepted a purely economic conception of backwardness, nor did it return to a strict anti-caste reading of equality. Instead, it developed a hybrid approach where caste remained constitutionally relevant, but only as evidence of social backwardness rather than as an end in itself.

Article 16 and the move toward substantive equality

In public employment, the early tension was between Article 16(1), which guarantees equality of opportunity, and Article 16(4), which enables reservation for backward classes not adequately represented in State services. In T. Devadasan v. Union of India (AIR 1964 SC 179), the Supreme Court struck down the carry-forward rule where its operation resulted in reservation far beyond reasonable limits in a given year. The case reinforced the idea that reservation could not be permitted to consume equality altogether.

But State of Kerala v. N.M. Thomas (AIR 1976 SC 490) marked a deeper shift. The majority upheld temporary relaxation of qualifying tests for Scheduled Caste and Scheduled Tribe employees and reasoned that Article 16(4) is not an exception to Article 16(1), but a specific instance of the broader equality principle. Equality, the Court said in substance, does not mean identical treatment of unequals; it may require differential treatment to neutralise entrenched disadvantage.

This is the jurisprudential turning point from formal equality to substantive equality. After N.M. Thomas, reservation doctrine was no longer merely about tolerated departures from equality; it was increasingly about constitutional methods of making equality real.

Indra Sawhney: the central case in reservation law

No decision has shaped Indian reservation law more profoundly than Indra Sawhney v. Union of India (AIR 1993 SC 477), the Mandal case. A nine-judge bench upheld 27 percent reservation for Other Backward Classes in Central services, but subjected it to major constitutional conditions.

The Court held, first, that backward classes under Article 16(4) may be identified with reference to caste, provided caste is treated as evidence of social backwardness and not as the sole constitutional basis. Secondly, it held that the creamy layer among OBCs must be excluded. Thirdly, it reaffirmed that total reservation ordinarily cannot exceed 50 percent in a year, save extraordinary circumstances. Fourthly, it held that Article 16(4) does not permit reservation in promotions. Fifthly, it struck down the additional 10 percent reservation for economically backward sections among higher castes because economic criteria alone could not ground reservation under Article 16(4).

Several doctrinal contributions of Indra Sawhney deserve emphasis. The creamy layer doctrine was designed to ensure that reservation benefits do not get monopolised by the advanced sections within backward classes. The Court also clarified that Article 16(4) concerns adequate representation, not proportional representation. Finally, it distinguished vertical reservations for SCs, STs and OBCs from horizontal reservations that cut across categories, such as reservation for women, persons with disabilities, or ex-servicemen.

Indra Sawhney remains the fulcrum of reservation law because later cases either apply it, modify it through constitutional amendments, or carve out carefully reasoned departures from it.

Women and the constitutional logic of horizontal reservation

Reservation doctrine cannot be fully understood without considering the place of women. Article 15(3) permits special provisions for women and children, and the Supreme Court treated this clause as broad enough to sustain reservation as well as affirmative preference.

In Government of Andhra Pradesh v. P.B. Vijay Kumar (AIR 1995 SC 1648), the Court upheld a rule giving women a 30 percent quota in public employment. It rejected the argument that reservation in employment could exist only under Article 16(4) for backward classes. Article 15(3), the Court held, is wide enough to authorise reservation for women even in State employment, and this power is not cut down by Article 16.

This is an important development because it reveals a structural difference between vertical and horizontal reservation. Women are not treated as a backward class under Article 16(4); instead, women’s reservation derives from the Constitution's separate commitment to gender justice. Later doctrine on horizontal reservations developed around this insight, recognising that women from SC, ST, OBC, or open categories must be adjusted in a manner that preserves both category representation and gender inclusion.

Reservation in promotions and the amendment-judgment cycle

Indra Sawhney denied reservation in promotions. Parliament responded through the 77th Constitutional Amendment, inserting Article 16(4A), and through later amendments such as Articles 16(4B) and the proviso to Article 335 dealing with backlog vacancies and relaxation of standards.

The constitutional validity of these amendments was considered in M. Nagaraj v. Union of India (2006) 8 SCC 212. The Supreme Court upheld the amendments but imposed conditions on their exercise. A State wishing to provide reservation in promotions had to collect quantifiable data showing backwardness, inadequacy of representation, and consistency with administrative efficiency under Article 335.

Later, in Jarnail Singh v. Lachhmi Narain Gupta (2018) 10 SCC 396, the Court clarified Nagaraj by holding that States need not prove the backwardness of SCs and STs afresh, since those groups are constitutionally recognised as backward. However, the State must still establish inadequate representation and keep administrative efficiency in view. The result is a narrower but still demanding framework for promotional reservation.

This line of cases shows the Court's continuing effort to reconcile representational justice with institutional competence. Reservation in promotions remains constitutionally permissible, but only within a controlled framework of evidence, review, and limits.

Educational reservation after the 93rd Amendment

The next major development concerns admissions to educational institutions. The Constitution (Ninety-Third Amendment) inserted Article 15(5), enabling the State to make special provisions for backward classes, SCs and STs in admissions to educational institutions, including private unaided institutions, except minority institutions.

In Ashoka Kumar Thakur v. Union of India (2008) 6 SCC 1, the Supreme Court upheld both Article 15(5) and the Central Educational Institutions (Reservation in Admission) Act, 2006, insofar as they operated for OBC reservations in Central educational institutions. At the same time, it insisted that the creamy layer principle must apply to OBCs here as well. It also indicated that reservation should not become perpetual and that periodic review is constitutionally necessary.

The judgment is important for two reasons. First, it confirms that reservation in education and reservation in employment are doctrinally linked but not identical. Secondly, it preserves judicial scrutiny over the identification of beneficiaries, even while upholding Parliament's broad power to design inclusive educational policy.

Single-post cadres, super-specialities and merit discourse

Reservation law has also evolved through cases that define its limits. In Chakradhar Paswan v. State of Bihar AIR 1988 SC 959 and Post Graduate Institute of Medical Education and Research v. Faculty Association (1998) 4 SCC 1 , the Supreme Court held that there can be no reservation in a single-post cadre, because that would amount to 100 percent exclusion of the general category and destroy equality of opportunity.

Similarly, judicial decisions have often resisted reservation in super-speciality medical education and in highly specialised posts where merit and technical expertise are treated as constitutionally weighty. The concern, repeatedly voiced in the texts and judgments, is not that social justice stops mattering, but that certain institutional contexts demand a more exacting balance between inclusion and excellence.

These decisions demonstrate that the Court has never treated reservation as mechanically applicable across all settings. The doctrine is contextual, and constitutional balance depends on the nature of the institution, the post, the stage of selection, and the public interest involved.

Creamy layer after Mandal

The creamy layer doctrine generated substantial litigation because several States attempted to dilute or evade it. In what is often referred to as Indra Sawhney II or the Kerala Creamy Layer case i.e., Indra Sawhney v. Union of India (II) AIR 2000 SC 498,the Supreme Court invalidated a Kerala statute that effectively declared there was no creamy layer within the backward classes in the State. The Court held that refusal to exclude the creamy layer violates Articles 14 and 16 because equals and unequals cannot be treated alike.

This doctrinal step is significant because it transforms creamy layer exclusion from a policy preference into a constitutional equality requirement. The principle is no longer merely administrative housekeeping; it is part of the constitutional structure of reservation itself, at least for OBCs.

Sub-classification: from Chinnaiah to Davinder Singh

A major unresolved question for years was whether the State could sub-classify Scheduled Castes so that the most deprived among them receive a more equitable share of reservation benefits. In E.V. Chinnaiah v. State of Andhra Pradesh AIR 2005 SC 98, the Supreme Court held that Scheduled Castes form a single homogeneous class under the Presidential List, and that States cannot create sub-classifications within that list.

That position no longer holds. In State of Punjab v. Davinder Singh (( 2025 ) 1 SCC 1), a seven-judge bench overruled Chinnaiah and upheld the permissibility of sub-classification within Scheduled Castes for the purpose of more equitable distribution of reservation benefits. The Court reasoned that substantive equality may require differential treatment even within constitutionally recognised groups where some sub-groups remain severely underrepresented.

The decision is a major doctrinal development. It distinguishes between altering the Presidential List, which States still cannot do, and designing internal allocation mechanisms based on empirical evidence of deprivation and unequal access to benefits. Reservation law therefore moves one step further away from formal homogeneity and one step closer to internal equality within protected groups.

OBC reservation in NEET and the rethinking of merit

Recent reservation doctrine also addresses the language of merit more directly. In Neil Aurelio Nunes v. Union of India (2022) 4 SCC 1, the Supreme Court upheld OBC reservation in the All India Quota seats for NEET admissions and rejected the argument that All India Quota seats are constitutionally reserved for pure open merit.

The judgment is notable for its conceptual treatment of merit. The Court observed that examinations often measure performance against unequal social backgrounds, and that a supposedly neutral merit list may simply reproduce structural privilege. Reservation, in this view, is not anti-merit; it is part of a constitutional effort to create fair conditions under which merit can be meaningfully judged.

This line of reasoning represents the most explicit judicial articulation of substantive equality in reservation jurisprudence. It rejects the old binary that pits merit against reservation and instead sees reservation as a constitutional tool for democratising access to merit-generating institutions.

Economically weaker sections and the new constitutional turn

The Constitution (One Hundred and Third Amendment) inserted Articles 15(6) and 16(6), enabling up to 10 percent reservation for economically weaker sections outside the existing SC, ST and OBC categories. This was a major departure from the earlier position in Indra Sawhney, which had refused to uphold economic criteria alone under Article 16(4).

In Janhit Abhiyan v. Union of India ( 2023 ) 5 SCC 1, a Constitution Bench upheld the amendment by a 3:2 majority. The majority held that reservation based solely on economic criteria is constitutionally permissible under the new amendment, that exclusion of SCs, STs and OBCs from EWS reservation is valid because they already enjoy separate affirmative action frameworks, and that the 50 percent ceiling is not an inflexible bar in this altered constitutional setting.

The EWS decision marks a new phase in reservation law. For the first time, affirmative action based purely on economic disadvantage has been constitutionally accepted, not by reinterpreting Article 16(4), but by adding new constitutional text. At the same time, the strong dissent in Janhit Abhiyan shows that the equality debate remains unresolved, especially on exclusion, ceiling limits, and the original logic of compensatory discrimination.

Conclusion

Three broad themes run through reservation jurisprudence. First, the Court has gradually shifted from formal equality to substantive equality. This movement can be traced from Champakam and Balaji to N.M. Thomas, Indra Sawhney, and Neil Aurelio Nunes.

Secondly, the Court has insisted that affirmative action remains constitutionally bounded. The 50 percent rule, the creamy layer doctrine, the prohibition on 100 percent reservation in single-post cadres, and the insistence on quantifiable data in promotion cases all show that reservation must remain a structured constitutional instrument rather than an unchecked political entitlement.

Thirdly, the jurisprudence increasingly recognises internal differentiation within protected groups. The acceptance of OBC sub-categorisation, the reopening of SC sub-classification in Davinder Singh, and the continuing debates around category capture all indicate that reservation law is now concerned not only with inter-group inequality but also with inequality within beneficiary groups.

The history of reservation through case law in India is best understood as the constitutional history of equality itself. The Supreme Court has moved from an initial suspicion of group-based preferences to a mature, though still contested, acceptance of affirmative action as integral to democratic inclusion. Yet it has never abandoned the concern that reservation may harden into permanent privilege, political patronage, or reverse discrimination. Its future development will likely depend on the same constitutional question that shaped its past: how to achieve inclusion without abandoning equality, and how to pursue justice without losing constitutional balance.