CivilsWisdom.
Updated · Today
Polity IR Econ Env S&T Security Geo Social Culture History
Polity & Governance April 19, 2026 5 min read Daily brief · #38 of 49

Delimitation decoded: What the Centre tried to do, why opposition shot it down & what happens next

The Constitution (131st Amendment) Bill, 2026 was defeated in the Lok Sabha on April 17, 2026, receiving 298 votes in favour against the 352 needed (two-thir...

GS Paper 2 (Indian Constitution Parliament Governance)

What Happened

  • The Constitution (131st Amendment) Bill, 2026 was defeated in the Lok Sabha on April 17, 2026, receiving 298 votes in favour against the 352 needed (two-thirds of 528 members present and voting); 230 members voted against.
  • The bill was part of a three-bill package — also including the Delimitation Bill, 2026 and the Union Territories Laws (Amendment) Bill, 2026 — that sought to expand Lok Sabha seats from 543 to a maximum of 850 and trigger delimitation based on the 2011 Census.
  • Following the defeat of the constitutional amendment, the government withdrew the Delimitation Bill, meaning women's reservation under the 106th Amendment (Nari Shakti Vandan Adhiniyam) will not come into effect for the 2029 general elections.

Static Topic Bridges

Article 82 and Article 170 — Constitutional Basis of Delimitation

Article 82 of the Constitution mandates that Parliament shall by law provide for the readjustment of allocation of seats in the House of the People (Lok Sabha) and the division of each state into territorial constituencies after every decennial census. Article 170 performs the same function for State Legislative Assemblies.

  • Article 82 empowers Parliament to enact a Delimitation Act after each census; the actual boundary-drawing is done by a Delimitation Commission set up under that Act.
  • Article 170 mirrors this for state assemblies, capping assembly strength between 60 and 500 members.
  • Both articles were frozen by the 42nd Amendment (1976), which locked constituency numbers based on the 1971 Census until after the 2001 Census.
  • The 84th Constitutional Amendment (2001) extended this freeze further — constituency numbers remain frozen until the first census published after 2026, specifically to incentivise population stabilisation.

Connection to this news: The 131st Amendment Bill sought to lift this freeze by increasing the maximum Lok Sabha strength to 850 and enabling fresh delimitation based on the 2011 Census. Its defeat means the freeze continues and the 543-seat structure remains unchanged.

The Delimitation Commission is a statutory, quasi-judicial body constituted under a Delimitation Act passed by Parliament. Its orders have the force of law and cannot be challenged in any court of law, making them final and binding.

  • Four Delimitation Commissions have been constituted so far: under Acts of 1952, 1962, 1972, and 2002.
  • Composition: A retired Supreme Court judge as Chairperson, the Chief Election Commissioner, and the concerned State Election Commissioner(s) as ex-officio members.
  • The 2002 Commission (chaired by Justice Kuldip Singh) redrew constituency boundaries based on the 2001 Census but did not alter the number of seats per state, in keeping with the 84th Amendment freeze.
  • The proposed 2026 Delimitation would have been the fifth such exercise, based on the 2011 Census.

Connection to this news: The Delimitation Bill, 2026 (withdrawn after the constitutional amendment's defeat) would have set up the fifth Delimitation Commission. Opposition concern centred on using the 2011 Census — which reflects slower population growth in southern states — rather than waiting for the 2021 Census data.

106th Constitutional Amendment Act, 2023 — Nari Shakti Vandan Adhiniyam

The Constitution (One Hundred and Sixth Amendment) Act, 2023 — popularly called the Nari Shakti Vandan Adhiniyam — mandates one-third reservation for women in the Lok Sabha, all State Legislative Assemblies, and the Delhi Legislative Assembly. It was passed by Lok Sabha on 20 September 2023 and by Rajya Sabha on 21 September 2023.

  • Introduces Article 330A (reservation for women in Lok Sabha), Article 332A (reservation in State Assemblies), and Article 334A (general provisions including sunset clause and rotation).
  • Article 334A contains a sunset clause: the reservation lasts for an initial period of 15 years from commencement, though Parliament can extend it by law.
  • Reserved constituencies rotate after each subsequent delimitation — no seat remains permanently reserved for women.
  • Critical condition: under Article 334A, the reservation comes into effect only after the delimitation undertaken following the publication of relevant census figures. It does not apply to existing constituencies.
  • The Centre notified April 16, 2026 as the date the 106th Amendment provisions came into force — the very day the three bills were introduced in Parliament.

Connection to this news: Because the 106th Amendment links activation of women's reservation to a post-census delimitation, the defeat of the 131st Amendment Bill (which was needed to enable that delimitation) directly delays women's reservation. The opposition argued this "linkage" was the design flaw, demanding immediate reservation on the existing 543-seat structure.

Constitutional Amendment Procedure — Two-Thirds Majority Requirement

Article 368 of the Constitution requires that a bill to amend the Constitution must be passed by each House of Parliament by a majority of the total membership of that House and by a majority of not less than two-thirds of members present and voting.

  • For the 131st Amendment Bill: with 528 members present and voting, the required two-thirds threshold was 352 votes.
  • The government secured only 298 votes — falling short by 54.
  • This was a notable constitutional moment: the first time in the Modi government's tenure that a constitutional amendment bill was defeated on the floor of Lok Sabha.
  • Simple majority bills (ordinary legislation) require only 50%+1; constitutional amendments need the higher two-thirds threshold precisely to prevent hasty alterations to the constitutional framework.

Connection to this news: The opposition's ability to collectively hold the line against the amendment — despite not being in government — demonstrates the constitutional safeguard that prevents the ruling coalition from unilaterally rewriting the basic structure of representation.

Key Facts & Data

  • Current Lok Sabha strength: 543 elected seats (as fixed by the 84th Amendment freeze based on the 1971 Census)
  • Proposed expansion: up to 850 seats (815 from states + 35 from Union Territories) under the 131st Amendment Bill
  • Votes cast in favour: 298; votes against: 230; votes needed for passage: 352 (two-thirds of 528 present)
  • Four Delimitation Commissions constituted: 1952, 1963, 1973, and 2002
  • 106th Amendment passed: September 20–21, 2023; notified in force: April 16, 2026
  • Women's reservation: 33% (one-third) of total seats in Lok Sabha, all State Assemblies, and Delhi Assembly
  • Sunset clause under Article 334A: 15 years from commencement, extendable by Parliament
  • The 84th Amendment (2001) froze seat numbers until after the first census published post-2026
  • Three bills in the package: Constitution (131st Amendment) Bill, Delimitation Bill, and UT Laws (Amendment) Bill
On this page
  1. What Happened
  2. Static Topic Bridges
  3. Article 82 and Article 170 — Constitutional Basis of Delimitation
  4. The Delimitation Commission — Composition and Legal Status
  5. 106th Constitutional Amendment Act, 2023 — Nari Shakti Vandan Adhiniyam
  6. Constitutional Amendment Procedure — Two-Thirds Majority Requirement
  7. Key Facts & Data
Display