Delimitation

1. Meaning and constitutional basis

Delimitation translates population distribution into electoral geography. Population growth, migration and urbanisation can produce large differences in constituency populations. Periodic readjustment seeks to prevent voters in heavily populated constituencies from having substantially less representative weight than voters elsewhere. However, population equality is qualified by constitutional exceptions and practical considerations.

Article 81 governs the composition of the Lok Sabha. It requires, as far as practicable, comparable population-to-seat ratios among States and comparable population-to-seat ratios among constituencies within each State. The interstate proportionality requirement contains an exception for States with populations not exceeding six million. Article 82 authorises Parliament to determine the authority and manner of readjustment after each census.

Article 170 provides the corresponding framework for State Legislative Assemblies. Articles 330 and 332 govern reservation of seats for Scheduled Castes and Scheduled Tribes in the Lok Sabha and State Assemblies respectively. Article 327 empowers Parliament to legislate on electoral matters, including delimitation. Under Article 328, State Legislatures have a supplementary power concerning their elections, subject to parliamentary legislation.

• Allocation: how many Lok Sabha seats a State receives.
• Delimitation within a State: where constituency boundaries run.
• Reservation: which constituencies are designated for SC or ST representation.
• Population, rather than the number of registered voters alone, is the constitutional basis.

2. Population freeze and the significance of 2026

The Constitution originally envisaged readjustment after every census. The Constitution (Forty-second Amendment) Act, 1976 froze interstate Lok Sabha seat allocation and Assembly seat totals on the 1971 population basis until the relevant figures of the first census after 2000 became available. A central policy rationale was to avoid penalising States that successfully reduced population growth.

The Constitution (Eighty-fourth Amendment) Act, 2001 extended the freeze until publication of relevant figures of the first census taken after 2026. It nevertheless permitted boundary readjustment without altering frozen seat allocations, initially using the 1991 Census. The Constitution (Eighty-seventh Amendment) Act, 2003 substituted the 2001 Census for this purpose.

Consequently, the 2002 Delimitation Commission redrew constituencies using the 2001 population while leaving the existing allocation of Lok Sabha seats among States unchanged. Its orders were generally brought into effect in 2008 and shaped the 2009 Lok Sabha election. The exercise did not cover every State uniformly: certain areas were excluded or deferred.

The year 2026 is therefore a constitutional reference point, not a self-executing deadline for new boundaries or additional seats. Publication of the relevant post-2026 census figures, the applicable legal framework and the delimitation exercise must follow. Interstate redistribution, boundary revision and expansion of a House should not be treated as interchangeable outcomes.

• Exam trap: the 2001 Census replaced the boundary-readjustment baseline, not the frozen interstate Lok Sabha allocation baseline.
• Demographic tension: representation according to population must be reconciled with concerns of States that achieved lower fertility.

3. Delimitation Commission, procedure and finality

The Delimitation Commission is a statutory body, not a permanent constitutional body. Under the Delimitation Act, 2002, its composition includes a serving or former Supreme Court judge as chairperson, the Chief Election Commissioner or an Election Commissioner nominated by the Chief Election Commissioner, and the State Election Commissioner of the concerned State. The State Election Commissioner is distinct from the Election Commission of India.

MPs and MLAs participate as associate members to provide local knowledge, but they do not vote on or sign the Commission’s decisions. The Commission prepares proposals, publishes them, invites objections and suggestions, and holds public sittings before finalising its orders. Consultation is thus built into the process, although agreement by all political parties is not required.

Constituencies should be geographically compact, with regard to physical features, existing administrative boundaries, communication facilities and public convenience. Each Assembly constituency must lie wholly within one parliamentary constituency. SC-reserved constituencies should be distributed across different parts of a State and, as far as practicable, selected where the SC population proportion is comparatively large. ST-reserved seats are generally located where the ST population proportion is largest.

Final orders published under the Act have the force of law. They are laid before Parliament and the concerned State Legislature, but those bodies cannot modify them through that laying procedure. Their commencement is governed by the applicable constitutional and statutory provisions, including presidential specification where required.

• Article 329(a) provides a strong constitutional bar against challenges to delimitation laws and seat allotment.
• In Meghraj Kothari v. Delimitation Commission (1967), the Supreme Court treated a notified delimitation order as law protected by Article 329(a).
• The rationale is electoral certainty: repeated boundary litigation should not indefinitely delay elections.

4. Federalism, representation and contemporary relevance

Delimitation involves a difficult balance between equal representation and federal accommodation. Faster-growing States can argue that their residents deserve representation reflecting present population. Lower-growth States can argue that successful public-health and population-stabilisation policies should not reduce their relative influence in national decision-making. These are questions of institutional design rather than evidence that delimitation itself is optional.

Within States, delayed boundary revision can underrepresent expanding cities and peri-urban settlements. Even after delimitation, exact numerical equality is neither always possible nor the sole statutory consideration. Difficult terrain, connectivity and administrative coherence matter. Gerrymandering, or manipulating boundaries for partisan advantage, is a related risk; an independent authority, reasoned proposals, transparent population data and meaningful hearings provide safeguards.

The Constitution (One Hundred and Sixth Amendment) Act, 2023 connects women’s reservation to a future delimitation exercise. Article 334A provides that the reservation provisions take effect after delimitation undertaken for this purpose following publication of relevant figures of the first census taken after the amendment’s commencement. This wording should be distinguished from the post-2026 census condition associated with the seat-allocation freeze.

• Possible reform discussions include increasing the total size of the Lok Sabha, but no particular future seat total should be assumed without legal authority.
• Assess any proposal through population equality, federal fairness, administrative feasibility and protection of marginalised groups.
• Women’s reservation was not made immediately operational merely by enactment of the 2023 amendment.

5. Exceptional exercises and examination distinctions

Not every delimitation exercise is conducted by a nationwide Commission under identical conditions. Special statutes and territorial reorganisations can authorise distinct arrangements. The legal basis, competent authority, census baseline and scope of the exercise must therefore be checked separately.

Jammu and Kashmir’s delimitation followed the Jammu and Kashmir Reorganisation Act, 2019 and the applicable delimitation framework. Assam’s 2023 exercise was undertaken by the Election Commission under Section 8A of the Representation of the People Act, 1950. These examples demonstrate why the statement that only a Delimitation Commission can ever redraw constituencies is incorrect.

• Delimitation is not the preparation or revision of electoral rolls.
• A reserved constituency does not restrict voting to the reserved community; eligible electors of all communities vote.
• Local-government delimitation follows relevant State laws and should not be confused with parliamentary and Assembly delimitation.

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