Almost every dispute about a roster ends up in the same place: which provision of the Constitution authorises what the establishment did. The answer is rarely Article 16(4) alone. Reservation in promotion, backlog vacancies outside the fifty per cent ceiling, EWS, and relaxation of qualifying marks each rest on a different clause, inserted at a different time, for a different reason. This part maps them.
Article 16(1) and (2): the baseline
Article 16(1) guarantees that there shall be equality of opportunity for all citizens in matters relating to employment or appointment to any office under the State. Article 16(2) forbids discrimination in respect of any employment on grounds only of religion, race, caste, sex, descent, place of birth, residence or any of them.
These two clauses are the rule. Everything that follows is built on top of them, and the way the courts have read that relationship matters more than it first appears.
Article 16(4): the enabling power
Article 16(4) provides that nothing in this article shall prevent the State from making any provision for the reservation of appointments or posts in favour of any backward class of citizens which, in the opinion of the State, is not adequately represented in the services under the State.
Three things in that wording repay attention. First, it is framed as a permission — nothing shall prevent — not as a command. Reservation under Article 16(4) is an enabling power, and the courts have consistently held that no individual has a fundamental right to compel the State to provide reservation. Second, the trigger is inadequate representation in the services of the State, which is a factual question about the cadre, not an abstract one about the community. Third, the clause speaks of appointments or posts, and that word posts is what the Supreme Court later fastened on when it moved rosters from vacancies to posts.
For many years Article 16(4) was treated as an exception carved out of Article 16(1) — a departure from equality, to be construed narrowly. In State of Kerala v. N.M. Thomas (1976) the Court took a different view, and in Indra Sawhney (1992) it was settled: Article 16(4) is not an exception to Article 16(1) but an instance of the classification that Article 16(1) itself permits. The practical consequence is that affirmative measures short of reservation can rest on Article 16(1), while reservation as such is governed by 16(4).
Article 16(4A): reservation in promotion
Indra Sawhney held that Article 16(4) does not permit reservation in promotion. Parliament responded. The Constitution (Seventy-seventh Amendment) Act, 1995 inserted Article 16(4A), enabling the State to provide for reservation in matters of promotion to any class of posts in favour of the Scheduled Castes and the Scheduled Tribes which, in the opinion of the State, are not adequately represented.
Note the narrowing. Article 16(4) speaks of any backward class of citizens; Article 16(4A) speaks only of the Scheduled Castes and the Scheduled Tribes. That single difference is the whole reason there is no OBC reservation in promotion, and the reason direct recruitment and promotion are maintained on separate rosters.
A correction worth making early. It is frequently written that the 85th Amendment inserted Article 16(4A). It did not. The 77th Amendment inserted the clause in 1995. The Constitution (Eighty-fifth Amendment) Act, 2001 substituted the words in matters of promotion, with consequential seniority, to any class for the earlier wording, with retrospective effect from 17 June 1995. The 85th Amendment added consequential seniority to a clause that already existed.
Article 16(4B): backlog vacancies
The Constitution (Eighty-first Amendment) Act, 2000 inserted Article 16(4B). It allows unfilled reserved vacancies of a year to be treated as a separate class of vacancies to be filled up in any succeeding year or years, and provides that such vacancies shall not be considered together with the vacancies of the year in which they are being filled up for determining the ceiling of fifty per cent reservation on total number of vacancies of that year.
This is the constitutional basis for the treatment of backlog vacancies, and it is the answer to the common question of how a department can fill backlog posts without breaching the fifty per cent limit. The ceiling applies to the current year's vacancies; backlog sits outside it as a distinct class. Part 11 of this series deals with how that works in practice, and with the widespread confusion between backlog and shortfall.
Article 16(6) and Article 15(6): EWS
The Constitution (One Hundred and Third Amendment) Act, 2019 inserted Article 15(6) and Article 16(6), enabling reservation for economically weaker sections of citizens other than those already covered by the existing schemes of reservation. Article 16(6) permits up to ten per cent of posts, in addition to the existing reservation.
The amendment was upheld by a Constitution Bench in Janhit Abhiyan v. Union of India (2022) by three to two. Part 8 covers EWS in the roster, including a point that is widely misunderstood in establishment sections: EWS did not take points away from the Scheduled Castes, Scheduled Tribes or Other Backward Classes.
Article 335: efficiency of administration
Article 335 requires that the claims of the members of the Scheduled Castes and the Scheduled Tribes shall be taken into consideration, consistently with the maintenance of efficiency of administration, in the making of appointments to services and posts.
The Constitution (Eighty-second Amendment) Act, 2000 added a proviso permitting the State to make any provision in favour of the Scheduled Castes and Scheduled Tribes for relaxation in qualifying marks in any examination, or lowering the standards of evaluation, for reservation in matters of promotion. That proviso is the authority for relaxed standards, and it matters directly for the own-merit question in Part 10 — a candidate who has taken a relaxation is not an own-merit candidate.
Article 15(4) — and a common error
Article 15(4) was inserted by the Constitution (First Amendment) Act, 1951, permitting special provision for the advancement of socially and educationally backward classes and for the Scheduled Castes and Scheduled Tribes.
The error to avoid: the First Amendment is routinely described in summaries as the response to State of Madras v. Champakam Dorairajan in the context of employment reservation. Champakam was not an employment case. It concerned Article 29(2) and admission to educational institutions, and the First Amendment inserted Article 15(4), which is about educational and social advancement. Employment reservation had its own clause, Article 16(4), from the commencement of the Constitution in 1950. Conflating the two produces a misleading account of the chronology.
How the clauses fit together
- Article 16(4) — reservation in direct recruitment, for any backward class inadequately represented. 1950.
- Article 16(4A) — reservation in promotion, SC and ST only. 77th Amendment, 1995; consequential seniority added by the 85th Amendment, 2001, retrospective to 17 June 1995.
- Article 16(4B) — backlog vacancies as a separate class, outside the year's fifty per cent ceiling. 81st Amendment, 2000.
- Article 16(6) — up to ten per cent for economically weaker sections. 103rd Amendment, 2019.
- Article 335 proviso — relaxation in qualifying marks and standards of evaluation in promotion. 82nd Amendment, 2000.
Every one of these was a legislative answer to something a court had said. The next part deals with the judgment that prompted three of the four.
Frequently Asked Questions (FAQ)
Q1. Does an employee have a right to demand reservation?
No. Article 16(4) is an enabling provision — it says that nothing in Article 16 shall prevent the State from making provision for reservation. The Supreme Court has consistently held that it confers a power on the State rather than a right on an individual, and that no writ lies to compel a State to provide reservation. Whether reservation is provided, and to what extent, is a decision for the State on the material before it.
Q2. Why is there no OBC reservation in promotion?
Because the clause that authorises reservation in promotion, Article 16(4A), is confined by its own words to the Scheduled Castes and the Scheduled Tribes. Article 16(4), which is wider and covers any backward class, was held in Indra Sawhney not to extend to promotion. So there is no constitutional provision that authorises OBC reservation in promotion, and none is provided in the Central Government.
Q3. Did the 85th Amendment create reservation in promotion?
No. The 77th Amendment of 1995 inserted Article 16(4A) and created reservation in promotion for SC and ST. The 85th Amendment of 2001 amended that existing clause to add consequential seniority, with retrospective effect from 17 June 1995. The two are frequently confused.
Q4. Is the fifty per cent ceiling in the Constitution?
No. It does not appear in the constitutional text. It comes from the judgments — its modern form from Indra Sawhney in 1992 — and it was reaffirmed by a Constitution Bench in the Maratha reservation case in 2021, which declined to refer the question to a larger bench. Article 16(4B) works around it for backlog vacancies, but does not remove it.
Related Reading
Next in this series: Indra Sawhney and the fifty per cent ceiling. If you would rather start with the practical side, the Reservation Roster Trainer lets you build a roster and have it marked.