State of Kerala v. N.M. Thomas: Article 16(4) as a facet, not an exception, of equality

State of Kerala & Anr. v. N.M. Thomas & Ors. looks, on its facts, like a narrow service-law dispute over a promotion exemption for a few hundred Kerala government clerks. It is instead the case that rewired how the Indian Supreme Court reads the equality code. A seven-judge Bench — the largest to consider Article 16 since the founding years of the Republic — split 5:2 to uphold the Kerala rule, and in doing so displaced the reading that had governed since M.R. Balaji v. State of Mysore (1963): that Article 16(4) was a carefully bounded exception to a norm of strict, individual-merit equality under Article 16(1). The majority — through separate opinions by Justices K.K. Mathew, V.R. Krishna Iyer and S. Murtaza Fazal Ali, with Chief Justice A.N. Ray and Justice M.H. Beg concurring in the result — held that preferential treatment for backward classes is not an intrusion on equality but an application of it. Every subsequent reservations judgment, from Indra Sawhney to the sub-classification cases of the last decade, argues in the shadow of that proposition.

The facts: a two-year grace period on a departmental test

The Kerala Government's Registration Department employed lower-division clerks who needed to clear a departmental test before being promoted to the upper division. In January 1972, the State inserted Rule 13AA into the Kerala State and Subordinate Services Rules, 1958. The rule allowed serving Scheduled Caste and Scheduled Tribe clerks to be promoted to the upper division without first clearing the test — subject to a condition that they clear it within two years of the promotion, failing which they would revert.

N.M. Thomas, a lower-division clerk who was not a member of a Scheduled Caste or Scheduled Tribe, had passed the test but was not promoted in the round in which several SC/ST colleagues who had not yet cleared it were promoted under Rule 13AA. He petitioned the Kerala High Court, arguing that the rule violated Articles 16(1) and 16(2) — equality of opportunity in public employment and the bar on discrimination on grounds only of caste — and fell outside the shelter of Article 16(4), because Rule 13AA was not, in his submission, a "reservation" of the kind Article 16(4) contemplates, and even if it were, the State had not made out the constitutional preconditions for reservation. The High Court found for Thomas. The State appealed to the Supreme Court, which referred the matter to a seven-judge Bench given the scale of the constitutional question the case raised.

The question the Bench actually had to answer

Two questions were nested inside the appeal. The narrower one was whether a departmental-test exemption of this kind is "reservation" within Article 16(4) at all, or something else — a relaxation of a qualifying standard rather than a reservation of posts — and, either way, whether it could be sustained under Article 16(1) read with Article 16(4) and Article 335 (which requires reservation claims for SC/ST to be considered "consistently with the maintenance of efficiency of administration").

The wider question, on which the Bench divided along the lines that matter for later doctrine, was structural: does Article 16(1)'s guarantee of "equality of opportunity" already permit the State to classify citizens to correct historic and structural disadvantage, so that Article 16(4) merely makes explicit a power the State already possesses — or is Article 16(4) instead the sole gateway through which any preferential treatment must pass, with Article 16(1) demanding, absent that gateway, formally identical treatment of every candidate?

The majority: equality of opportunity already permits classification

Justice Mathew, writing one of the principal majority opinions, held that "equality of opportunity" under Article 16(1) is not the equality of the identical starting line for every runner; it is an equality that reckons with the fact that people from different sections of society do not, in fact, arrive at the selection process with an equal chance of satisfying its criteria. On that reading, a classification that corrects for that unequal starting position is not a departure from Article 16(1) — it fulfils it. Justice Fazal Ali, in a separate opinion that Justice Krishna Iyer explicitly endorsed, put the same point in institutional terms: equality of opportunity must mean a fair opportunity to all sections, which requires removing the handicaps that some sections carry into the competition, not merely refusing to erect new ones.

On the narrower question, the majority held that Rule 13AA's test exemption was a reasonable classification with a rational nexus to the object of securing adequate SC/ST representation in the services, satisfying Article 14 and Article 16(1) on ordinary classification principles, and consistent with the efficiency safeguard in Article 335 given the two-year time limit within which the promoted employees still had to qualify.

Krishna Iyer's warning: the idea of a "creamy layer," fifteen years early

Justice Krishna Iyer's opinion is remembered for more than the facet-not-exception holding. Concurring in the majority's result, he sounded a caution about which section of a backward class actually receives the benefit of preferential measures — a concern that would not become binding law until Indra Sawhney articulated the creamy-layer doctrine in 1992, but that Krishna Iyer J. had already flagged in sociological terms in 1975.

The observation was not part of the operative holding — Rule 13AA was upheld regardless — but it is the acknowledged origin of the phrase and the concern that Indra Sawhney would later convert into a binding constitutional requirement.

The dissent: Khanna and Gupta JJ.

Justice H.R. Khanna, dissenting, held to the Balaji-era reading: Article 16(1) does not itself carry any warrant for preferential treatment of one citizen against another, and any such preference must be located within, and justified strictly by, Article 16(4). On his reading, once a measure is treated as falling outside the specific bounds of Article 16(4) — as he considered the open-ended test exemption in Rule 13AA to be — it cannot be salvaged by treating Article 16(1) as an independent source of power to classify. Justice A.C. Gupta joined the dissent on substantially similar grounds, producing the 5:2 split.

The dissent's concern was less about the substantive merits of correcting SC/ST underrepresentation than about the doctrinal discipline of confining preferential State action to the textually specified gateway — a concern about open-ended executive discretion that resurfaces, in different form, in the efficiency and adequacy-of-representation safeguards that M. Nagaraj would later impose on promotion reservation.

The doctrinal afterlife

N.M. Thomas did not resolve reservation doctrine; it reoriented it. The facet-not-exception reading is the premise on which the nine-judge Bench in Indra Sawhney v. Union of India (1992) proceeded when it worked out the 50% ceiling and the creamy-layer doctrine — a doctrine that traces its lineage directly to Krishna Iyer J.'s 1975 caution. When Parliament later moved to protect promotion reservation against the post-Indra Sawhney restrictions through the 77th, 81st, 82nd and 85th Amendments, the constitutional validity of that architecture was tested in M. Nagaraj v. Union of India (2006), which built its three-pronged framework — backwardness, inadequacy of representation, administrative efficiency — squarely on the equality-code reading that N.M. Thomas had first articulated. Jarnail Singh v. Lachhmi Narain Gupta (2018) revisited the creamy-layer question within that same lineage, and State of Punjab v. Davinder Singh (2024) extended the substantive-equality reasoning to sub-classification within the Scheduled Castes — each case a further layer on the foundation N.M. Thomas poured.

The practitioner's take

For reservation and classification challenges generally. N.M. Thomas remains the doctrinal starting point for the proposition that preferential measures for backward classes need not be defended solely within the four corners of Article 16(4); they can, in an appropriate case, be grounded in Article 16(1)'s own conception of substantive equality. Counsel defending a State classification should plead both routes.

For promotion-reservation and efficiency arguments. The Article 335 reasoning in N.M. Thomas — that a time-bound relaxation consistent with an eventual efficiency safeguard survives scrutiny — remains a template, though it now operates alongside the more demanding Nagaraj/Jarnail Singh three-pronged test for promotion reservation specifically.

For creamy-layer arguments. Krishna Iyer J.'s 1975 caution is not itself binding law — the binding creamy-layer requirement dates to Indra Sawhney — but it is the doctrinal ancestor worth citing for context when tracing the lineage of the requirement before a court considering its scope.

Related on Valkya

• E.P. Royappa v. State of Tamil Nadu (1973): the birth of the arbitrariness doctrine under…
• Krishna Kumar Singh v. State of Bihar: the seven-judge Bench that made re-promulgation of…

Sources

• State of Kerala & Anr. v. N.M. Thomas & Ors. — full judgment (19 September 1975), Supreme Court of India
• Creamy Layer: Court in Review — Supreme Court Observer
• Decoding Sub-Classification in SCs — SCC Times
• The 100% reservation judgment: Continuing confusion in India's Affirmative Action jurisprudence — Bar & Bench