M. Nagaraj v. Union of India (2006)

M. Nagaraj v. Union of India, decided on 19 October 2006, is a landmark constitutional judgment of the Supreme Court of India that validated Parliament's power to extend reservations to government-service promotions for Scheduled Castes (SCs) and Scheduled Tribes (STs). The case was decided by a five-judge Constitutional Bench comprising Chief Justice Y.K. Sabharwal and Justices K.G. Balakrishnan, S.H. Kapadia (who authored the judgment), C.K. Thakker, and P.K. Balasubramanyan. The judgment is reported as (2006) 8 SCC 212 / AIR 2007 SC 71.

The litigation arose after the Supreme Court's 1992 ruling in Indra Sawhney v. Union of India held that reservations under Article 16(4) of the Constitution applied only to initial recruitment and not to promotions. Parliament responded by passing four constitutional amendments: the 77th Amendment Act (1995), which inserted Article 16(4A) enabling reservation in promotions for SCs and STs; the 81st Amendment Act (2000), which inserted Article 16(4B) allowing carry-forward of unfilled reserved vacancies without counting them against the 50 per cent ceiling in any given year; the 82nd Amendment Act (2000), which amended Article 335 to permit relaxation of qualifying marks for SC/ST candidates; and the 85th Amendment Act (2001), which introduced "consequential seniority" for SC/ST employees promoted under Article 16(4A). M. Nagaraj and other petitioners challenged all four amendments as violating the Constitution's basic structure, arguing that equality under Articles 14 and 16(1) was a foundational principle beyond Parliament's power to abrogate.

The Bench unanimously upheld all four amendments. It held that equality is indeed a part of the basic structure but that the impugned amendments did not obliterate it — they merely expanded the affirmative-action space already contemplated by the Constitution within permissible limits. The Court established three mandatory conditions that a State must satisfy before implementing any promotion-reservation scheme: (1) demonstrate the backwardness of the SC/ST class concerned through quantifiable data; (2) show that the class is inadequately represented in the post or service in question; and (3) establish that reservation would not compromise overall administrative efficiency as required by Article 335. The Court also held that the "catch-up rule" — under which a general-category candidate who is superseded by a reserved-category promotion must regain seniority when the general-category candidate is eventually promoted — and the doctrine of "consequential seniority" are service-jurisprudence concepts rather than constitutional axioms, and therefore Parliament was within its authority to legislate on them. The 50 per cent ceiling on total reservations, first established in Indra Sawhney, was explicitly preserved. The judgment was unanimous; there was no dissent.

Nagaraj's long-term legal legacy has been contested. In Jarnail Singh v. Lachhmi Narain Gupta (2018), a later five-judge Constitutional Bench declined to refer Nagaraj to a seven-judge bench for reconsideration but significantly modified it: the 2018 court struck down Nagaraj's requirement that States produce fresh quantifiable data on the backwardness of SCs and STs (holding that Parliament's designation of a community as SC/ST is already conclusive evidence of backwardness), while simultaneously introducing the creamy-layer exclusion principle for promotion reservations — a protection that Nagaraj itself had left open. The combined Nagaraj-Jarnail Singh framework continues to govern reservation-in-promotion jurisprudence in India.

From a Dalit-rights perspective, the Nagaraj judgment is ambivalent in its effects. By upholding the constitutional amendments it provided a judicial foundation for promotion reservations that Dalits and Adivasis had been excluded from since 1992. At the same time, the three-condition framework — particularly the quantifiable-data requirement later struck down in Jarnail Singh — imposed procedural burdens that allowed state governments to stall or avoid implementing promotion reservations for years, and the consequential-seniority provisions remain a flashpoint in ongoing litigation.