M. Nagaraj v. Union of India (2006)

M. Nagaraj v. Union of India (2006) 8 SCC 212 is a Constitution Bench judgment delivered on 19 October 2006 by a five-judge bench headed by Chief Justice Y.K. Sabharwal. The case arose from a clutch of writ petitions challenging the constitutional validity of the 77th, 81st, 82nd, and 85th Amendments to the Constitution of India. These amendments were Parliament's legislative response to earlier judicial pronouncements, chiefly Indra Sawhney v. Union of India (1992), which had held that Article 16(4) did not extend to reservation in promotions. To neutralise that ruling, Parliament inserted Article 16(4A) by the 77th Amendment (1995) enabling reservation in promotion for Scheduled Castes and Scheduled Tribes, added the "consequential seniority" rule through the 85th Amendment (2001, retrospective to 1995), restored the carry-forward of unfilled vacancies via the 81st Amendment (Article 16(4B)), and exempted reservation from the 50 per cent ceiling and creamy-layer norms in promotion through the 82nd Amendment to Article 335. The petitioners argued that these amendments destroyed the basic structure of the Constitution by obliterating equality.

The Court's central procedural achievement was to subject the impugned amendments to the basic structure test laid down in Kesavananda Bharati (1973). The bench held that the amendments were constitutionally valid because they were enabling provisions—they conferred discretionary power on the State rather than imposing a mandatory obligation to reserve. The width of the power was preserved, but its exercise was fenced. The Court ruled that whenever a State chooses to provide reservation in promotion for SC/ST candidates, it must, before doing so, collect quantifiable data demonstrating three distinct facts: the backwardness of the class concerned, the inadequacy of its representation in the cadre to which promotion is sought, and that the reservation would not impair the overall efficiency of administration as mandated by Article 335.

These three conditions—backwardness, inadequacy of representation, and administrative efficiency—became known as the Nagaraj triple test. The Court further reiterated that the ceiling limit of 50 per cent, the concept of the creamy layer, and the principle that extending reservations indefinitely violates equality together constitute the structural constraints that no amendment may breach. Compelling reasons grounded in identifiable data, not political expediency, must justify each exercise of the enabling power. The bench clarified that the State is not bound to make reservations in promotion at all; but if it does, judicial review remains available to test whether the constitutional pre-conditions were satisfied through contemporaneous evidence rather than ex post facto rationalisation.

In practice, Nagaraj reshaped service jurisprudence across Indian states. The Government of India and several state governments—including Uttar Pradesh, Maharashtra, and Karnataka—found their promotion-reservation rosters challenged for want of the quantifiable data the judgment required. The Allahabad and other High Courts struck down promotion orders where the relevant department had not constituted committees or gathered cadre-wise representation figures. The Department of Personnel and Training (DoPT) issued instructions seeking to reconcile its 1997 office memoranda with the new data requirement, and the resulting uncertainty froze numerous departmental promotion committees for years pending litigation.

Nagaraj must be distinguished from Indra Sawhney (1992), which dealt primarily with reservation in initial appointments for Other Backward Classes and which first articulated the creamy-layer doctrine and the 50 per cent ceiling. Nagaraj extended creamy-layer scrutiny conceptually to SC/ST promotions, a point that would later prove contentious because SC/ST classification rests on social stigma rather than economic backwardness. It is also distinct from Ashoka Kumar Thakur (2008), which addressed OBC reservation in higher education under Article 15(5). Where Indra Sawhney governs entry-level reservation policy, Nagaraj governs the constitutional architecture of promotion-stage reservation and the evidentiary burden the State must discharge.

The judgment's most litigated controversy concerned whether the State must collect quantifiable data on backwardness for Scheduled Castes and Scheduled Tribes, given that their backwardness is presumed by their very listing under Articles 341 and 342. In Jarnail Singh v. Lakhmi Narain Gupta (2018), a five-judge bench partially read down Nagaraj, holding that the requirement to collect quantifiable data on backwardness of SC/ST was invalid because it ran contrary to the nine-judge ruling in Indra Sawhney, while simultaneously affirming that the creamy-layer principle does apply to SC/ST in the context of promotions. The Court in Jarnail Singh declined to refer Nagaraj to a larger bench. Subsequent rulings, including the 2022 judgment in Jarnail Singh (II) and related matters, continued to wrestle with how states must quantify inadequacy of representation cadre-by-cadre.

For the working practitioner—UPSC aspirants preparing General Studies Paper II, desk officers drafting promotion rosters, and policy researchers analysing affirmative-action design—Nagaraj remains the foundational precedent on reservation in promotion. It establishes that equality of opportunity under Article 16 is an integral part of the basic structure, that enabling powers survive constitutional challenge only when their exercise is data-driven, and that the judiciary retains supervisory authority over affirmative-action policy. Anyone advising on cadre management, contesting or defending a promotion order, or examining the constitutional limits of social-justice legislation must read Nagaraj alongside Jarnail Singh to understand precisely which of its conditions still bind the State and which have since been read down.