Parties and roles: Jarnail Singh is the appellant/applicant who initiated or carried the matter to the Supreme Court. Lachhmi Narain Gupta is the respondent opposing the relief or defending the challenged action, decision, law or proceeding. The labels “plaintiff” and “defendant” are generally not used here because this is an appellate, special or Supreme Court proceeding. M. Nagaraj required States granting SC/ST reservation in promotion to collect quantifiable data showing backwardness, inadequate representation and administrative efficiency. Governments and employees argued that demanding proof of backwardness from constitutionally recognized SC/ST groups contradicted precedent and made promotion reservation difficult. The Court also considered whether the creamy-layer principle applies within SC/ST benefits. Procedural and real-world context: 2006: M. Nagaraj upheld constitutional amendments enabling reservation in promotion but required quantifiable data. In simple terms, the Court had to resolve must States collect quantifiable data proving SC/ST backwardness before reservation in promotion? Does creamy-layer exclusion apply? Did Nagaraj require reconsideration by a larger bench? The outcome mattered immediately because nagaraj did not require reference to seven judges, but its requirement of collecting data to prove SC/ST backwardness was invalid because it conflicted with Indra Sawhney. States must still establish inadequate representation and consider administrative efficiency. Procedural setting: 2006: M. Nagaraj upheld constitutional amendments enabling reservation in promotion but required quantifiable data. | Conflicting implementation disputes followed. | 2017: Reference sought reconsideration. | 26 Sep 2018: Constitution Bench modified Nagaraj without referring to seven judges. The central problem before the Court was must States collect quantifiable data proving SC/ST backwardness before reservation in promotion? Does creamy-layer exclusion apply? Did Nagaraj require reconsideration by a larger bench? The controversy was considered in the framework of Constitutional amendments concerning arts.16(4A), 16(4B), 335; service reservation rules, together with Constitution arts.14, 16(4), 16(4A), 16(4B), 335 and 341-342. The wider importance of the case lies in substantive equality; reservation in promotion; creamy layer; quantifiable data; stare decisis.

Reserved-category employees/States: SC/ST backwardness is constitutionally recognized and needs no fresh proof; Nagaraj should be reconsidered. | Opponents: promotion reservation affects equality and efficiency; data and exclusion of advanced sections are necessary safeguards. Competing positions in context: Jarnail Singh's position: as the appellant/applicant, Jarnail Singh sought the relief indicated by the questions of law and challenged the opposing action or interpretation. The claim was that the Court should apply the governing provisions consistently with Substantive equality; reservation in promotion; creamy layer; quantifiable data; stare decisis. Lachhmi Narain Gupta's position: as respondent, Lachhmi Narain Gupta resisted that relief, defended the impugned measure or decision, or proposed a narrower interpretation of the Court's power and the applicable law. The Court therefore had to test these submissions against Constitutional amendments concerning arts.16(4A), 16(4B), 335; service reservation rules and Constitution arts.14, 16(4), 16(4A), 16(4B), 335 and 341-342, the record of the proceedings and binding precedent. This summary states the principal controversy in accessible language; the official judgment remains authoritative for counsel-specific submissions and paragraph references.

Nagaraj did not require reference to seven judges, but its requirement of collecting data to prove SC/ST backwardness was invalid because it conflicted with Indra Sawhney. States must still establish inadequate representation and consider administrative efficiency. The creamy-layer principle applies to prevent reservation benefits from being monopolized by the advanced within SC/ST groups; it is an equality principle, not alteration of the Presidential Lists. Effect of the decision: the ruling explains or applies Substantive equality; reservation in promotion; creamy layer; quantifiable data; stare decisis and binds the parties to the operative directions made in SLP(C) No. 30621/2011 and connected matters. It also guides lower courts and public authorities on materially similar questions under Constitutional amendments concerning arts.16(4A), 16(4B), 335; service reservation rules. Scope and caution: only the ratio decidendi and operative directions of the signed judgment are binding; summaries should not be treated as substitutes for the judgment, separate opinions, later review orders or subsequent precedent.

Constitutional amendments concerning arts.16(4A), 16(4B), 335; service reservation rules

Constitution arts.14, 16(4), 16(4A), 16(4B), 335 and 341-342

Substantive equality; reservation in promotion; creamy layer; quantifiable data; stare decisis