Parties and procedural roles: Jarnail Singh and the connected SC/ST employees were appellants seeking workable implementation of reservation in promotion. Lachhmi Narain Gupta and the connected Union/State authorities and affected employees were respondents defending or questioning the challenged promotion policies. In Indian Supreme Court terminology, these parties are therefore described as petitioner/appellant and respondent, accused/prosecution, or contemnor/Court as appropriate—not automatically as plaintiff and defendant.

Detailed factual and procedural background: SC/ST employees led by Jarnail Singh challenged promotion policies and the manner in which governments applied reservation after M. Nagaraj. Union and State authorities were respondents. The dispute was not whether reservation must always be granted, but what data an employer must collect before providing it and at what administrative level inadequacy of representation must be assessed.

How the dispute reached the Court: The proceeding numbered C.A. No. 629/2022 developed through the events recorded in the timeline: 2018: Constitution Bench in Jarnail Singh upheld collection of quantifiable data for reservation in promotion while removing the need to prove backwardness of SC/STs. 2021: connected matters heard on implementation. 28 January 2022: Court prescribed unit-wise data and review requirements. The concrete problem was not merely academic; it required the Court to decide: What is the correct unit for collecting quantifiable data on inadequate SC/ST representation? May courts prescribe a fixed benchmark, and how frequently must reservation-in-promotion policies be reviewed?

Employees argued that broad cadre or service data could conceal under-representation and that promotions should not remain stalled. Governments sought workable guidance and warned against judicially fixed numerical quotas. The Court focused on cadre as the relevant unit, periodic review, and compliance with constitutional ceilings.

Expanded comparison of the competing positions: The side seeking relief asked the Court to apply Substantive equality; reservation in promotion; quantifiable data; cadre as unit; judicial review to the actual institutional or individual harm shown by the record. The opposing side relied on statutory authority, procedural regularity, governmental necessity, finality or administrability, depending on the proceeding, and urged a narrower remedy. Both positions had to be tested against Reservation policies and service rules; Scheduled Castes and Scheduled Tribes framework and Articles 14, 16(4), 16(4A), 16(4B) and 335.

What the Court had to evaluate: It examined the text and purpose of the governing provisions, binding precedent, the evidentiary or institutional record, and the practical consequences of accepting either interpretation. The decisive questions were: What is the correct unit for collecting quantifiable data on inadequate SC/ST representation? May courts prescribe a fixed benchmark, and how frequently must reservation-in-promotion policies be reviewed?

The Court held that quantifiable data must be collected cadre-wise, because cadre is the unit in which promotion operates. It declined to prescribe a universal numerical test for inadequacy, leaving assessment to the State, subject to judicial review, and required periodic review. It also clarified prospective operation of the data requirement for promotions already made.

Reasoning and legal effect: The result followed from the Court’s application of Substantive equality; reservation in promotion; quantifiable data; cadre as unit; judicial review to Reservation policies and service rules; Scheduled Castes and Scheduled Tribes framework read with Articles 14, 16(4), 16(4A), 16(4B) and 335. The Court distinguished the legal rule binding future courts from observations confined to the facts, and tailored the operative relief to the procedural posture of JARNAIL SINGH vs LACHHMI NARAIN GUPTA.

Practical consequence: The parties are bound by the operative directions in C.A. No. 629/2022; lower courts, governments, regulators or investigating authorities must apply the stated ratio in materially similar cases. Any prospective limitation, remand, monitoring direction, bail condition, implementation safeguard or preservation of concluded matters mentioned above forms part of the scope of the ruling. The signed judgment remains controlling if a short summary and the operative paragraphs differ.

Reservation policies and service rules; Scheduled Castes and Scheduled Tribes framework

Articles 14, 16(4), 16(4A), 16(4B) and 335

Substantive equality; reservation in promotion; quantifiable data; cadre as unit; judicial review