Sub-classification Within Scheduled Castes

Sub-classification means dividing the constitutionally notified Scheduled Castes into internal groups so that reservation benefits reach castes that remain more disadvantaged or under-represented. It concerns distribution within the existing quota and does not permit a state to change the list notified under Article 341.

Equality and reservation principles

The constitutional basis is substantive equality, which permits different treatment where groups are not similarly situated. Article 14 allows a reasonable classification based on an intelligible differentia that has a rational connection with the policy objective.

• Article 15(4) enables special provisions for the advancement of socially and educationally backward classes and Scheduled Castes and Scheduled Tribes.
• Article 16(4) enables reservation in public employment for a backward class that, in the state's opinion, is inadequately represented.
• Internal preference may therefore be used to prevent relatively better-represented Scheduled Castes from absorbing a disproportionate share of benefits.

Limits imposed by the Scheduled Castes list

Under Article 341, the President specifies the Scheduled Castes, while Parliament alone may include or exclude a caste from that list. However, inclusion in one list does not make all Scheduled Castes equally disadvantaged for every distributive purpose.

• A state may prioritise groups within the notified list, but it cannot add a caste to, or remove one from, that list.
• Sub-classification cannot amount to complete exclusion of any notified caste from Scheduled Caste reservation benefits.
• Sub-classification is group-based prioritisation; it is conceptually distinct from a creamy-layer rule that excludes advanced individuals or families.

Judicial doctrine and safeguards

In State of Punjab v. Davinder Singh (2024), a seven-judge Bench held that sub-classification within Scheduled Castes is constitutionally permissible and overruled E.V. Chinnaiah v. State of Andhra Pradesh (2004) on this point.

• The classification must rest on relevant empirical material showing differential disadvantage or inadequate representation in the field concerned.
• The state must provide a rational basis for both creating the sub-class and determining its share of benefits.
• The measure remains subject to judicial review for arbitrariness, mala fides or unconstitutional exclusion.

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