Article 330 — Reservation of Seats for SC/ST in Lok Sabha

Article 330 of the Constitution of India provides for the reservation of seats in the House of the People (Lok Sabha) for the Scheduled Castes and Scheduled Tribes. It sits within Part XVI of the Constitution, titled "Special Provisions Relating to Certain Classes," which spans Articles 330 to 342 and embodies the framers' commitment to corrective political representation for communities historically excluded from power. The article draws its definitional content from Article 341 (Scheduled Castes) and Article 342 (Scheduled Tribes), under which the President, by public notification and in consultation with the Governor of a state, specifies the castes and tribes deemed Scheduled for that state. Clause (1) of Article 330 mandates reservation for the SCs and STs generally, while a separate provision addresses the autonomous districts of Assam and the Scheduled Tribes in the tribal areas of that state, reflecting the distinct administrative arrangements under the Sixth Schedule.

The procedural mechanics rest on proportionality. Article 330(2), as it now reads following the Constitution (Eighty-fourth Amendment) Act, 2001, requires that the number of seats reserved in any state or Union territory for the SCs or the STs bear, as nearly as may be, the same proportion to the total number of seats allotted to that state or Union territory as the SC or ST population bears to the total population of that unit. The mechanism is therefore arithmetical: the Delimitation Commission, constituted under the Delimitation Act, identifies the total constituencies for each state, calculates the SC and ST share of population from the relevant census, and designates a corresponding number of constituencies as reserved. Within a state, the Commission selects which specific constituencies become reserved, distributing them across the territory rather than concentrating them, and for SC seats it chooses constituencies with relatively higher SC populations spread geographically.

A critical refinement concerns the census reference point. Article 330(3), inserted by the Eighty-fourth Amendment, freezes the population figures used for this proportional calculation to the 1971 census until the first census taken after 2026, a freeze extended by the Eighty-seventh Amendment (2003) which permitted the readjustment of constituency boundaries on the basis of the 2001 census while retaining the 1971 figures for the number of seats. This freeze was a political compromise designed to prevent states that had successfully controlled population growth from losing parliamentary seats relative to states with higher growth. The reservation itself is not permanent in the constitutional design: Article 334 originally set a ten-year sunset for SC/ST reservation and for the nomination of Anglo-Indians, and successive amendments have extended it, most recently the Constitution (One Hundred and Fourth Amendment) Act, 2019, which extended SC/ST reservation to 25 January 2030 while discontinuing the nomination of Anglo-Indians.

In concrete terms, of the 543 elected seats in the present Lok Sabha, 84 are reserved for Scheduled Castes and 47 for Scheduled Tribes. The most recent comprehensive delimitation exercise was conducted by the Delimitation Commission of India headed by Justice Kuldip Singh, constituted in 2002 under the Delimitation Act, 2002, whose recommendations took effect for the 2009 general election. State-specific arrangements remain salient: in Lakshadweep and the tribal-majority constituencies of the Northeast, ST reservation dominates, while in Uttar Pradesh and West Bengal large numbers of SC-reserved constituencies reflect substantial Dalit populations. The Election Commission of India administers polling in these constituencies on the standard franchise, meaning all voters in a reserved constituency vote, but only SC or ST candidates may contest.

Article 330 must be distinguished from several adjacent provisions. Article 332 performs the parallel function for the Legislative Assemblies of the states, not the Lok Sabha. Article 331 dealt with the nomination of Anglo-Indians to the Lok Sabha, a provision rendered inoperative after 2020. Reservation under Article 330 is reservation of seats—a political guarantee—and is conceptually separate from reservation in public employment and educational institutions under Articles 16(4) and 15(4)–(5). It is also distinct from the reservation of seats for women under the Constitution (One Hundred and Sixth Amendment) Act, 2023, the Nari Shakti Vandan Adhiniyam, which will operate after a delimitation exercise and overlays women's quotas, including within SC/ST-reserved seats.

The provision is not free of controversy. Critics argue that reserving entire constituencies dilutes accountability, since SC candidates depend on a predominantly non-SC electorate, potentially producing legislators responsive to dominant-caste interests rather than to Dalit constituents. The prolonged census freeze under Articles 330(3) and 81 has generated a north-south imbalance debate, as the long-pending post-2026 delimitation threatens to redistribute seats toward more populous northern states, with significant federal consequences. The passage of the women's reservation amendment further entangles Article 330, because its implementation is tied to a fresh delimitation that has itself been deferred.

For the working practitioner—whether a UPSC aspirant addressing GS Paper II, a parliamentary researcher, or a policy analyst—Article 330 is foundational to understanding India's model of guaranteed political representation as distinct from the consociational or proportional-representation systems used elsewhere. It illustrates how the Constitution operationalises substantive equality through structural design, and its impending interaction with delimitation, the 2030 sunset, and women's reservation makes it a live area of constitutional and federal contestation rather than a settled historical artefact.