Reservation in promotion pertains to reservations granted to Scheduled Castes and Scheduled Tribes (SCs/STs) for promotions in public employment. It has been a bitterly contested issue between the Supreme Court and Parliament. In 1992 the Court, in its Indra Sawhney judgment, found that Article 16(4) does not allow for reservation in promotion. Then, between 1995 and 2000, Parliament enacted a series of Constitutional Amendments that legalized reservation in promotion. In 2006, the Court responded with its Nagaraj judgement, which placed strict conditions on when the State could grant a SC/ST reservation in promotion. Currently, the Court is hearing a petition filed by the State of Tripura, challenging Nagaraj.

1992
Indra Sawhney v UOI
1995
Article 16(4A) - 77th Amendment
1996
S Vinod Kumar v UOI
1996
Introduction of Catch Up Rule - Ajit Singh v State of Punjab
2000
Article 16(4B) & Carry Forward Rule – 81st Amendment
2000
Proviso to Article 335 – 82nd Amendment
2001
Article 16(4A) & Consequential Seniority for SC/STs – 85th Amendment
2006
Nagaraj v UOI
2007
After Nagaraj
2017
Challenge to Nagaraj - State of Tripura v Jayanta Chakraborty