Delimitation

Also called: Article 82, Article 170 · Topic: Elections and the Electoral System · NCERT: Class 9, Ch 7 "Elections"; Class 11, Ch 3 "Election and Representation"; Class 11, Ch 5 "Legislature"; Class 12, Ch 2 "Era of One-Party Dominance"

Meaning

Delimitation is the process of fixing how many seats each state gets in the Lok Sabha and in its Legislative Assembly, and of drawing the boundaries of each constituency (the area that elects one member). An independent Delimitation Commission does this work, based on census population.

It matters because it protects the rule of "one person, one vote, one value": each citizen's vote should carry equal weight. Since the 42nd Amendment (1976), the number of seats each state gets has been frozen on the 1971 census. This is why the Lok Sabha has had 543 elected seats since 1976. The freeze ends once the figures of Census 2027 are published.

Explanation

Why delimitation is needed

• Goal: equal value of each vote. Each seat should have roughly the same population.
• Without delimitation, one MP might represent 5 lakh people and another 25 lakh.

• A vote in the bigger seat would then count for only one-fifth of a vote in the smaller seat.

• It does two jobs:

• it decides how many seats each state gets;

• it draws the boundaries of each constituency inside a state.

• It also decides reserved seats. It chooses which seats are reserved for Scheduled Castes (SC) and Scheduled Tribes (ST). These are the seats where SCs or STs form the highest share of the population.

• It prevents gerrymandering. Gerrymandering means drawing boundaries to help one party or group, for example by splitting a community's voters across many seats. India avoids this by giving the job to an independent commission, not to the ruling party.

The Delimitation Commission: who sits on it

• Parliament sets up the commission by law. It works separately from the government of the day.
• Members under the Delimitation Act, 2002:
• Chairperson: a retired Supreme Court judge;
• the Chief Election Commissioner (CEC), or an Election Commissioner whom the CEC nominates;

• the State Election Commissioner of the state concerned.

• Associate members: 5 MPs and 5 MLAs from each state. They give advice but cannot vote.

The procedure, step by step

1. The commission prepares draft proposals.
2. The drafts are published in the Gazette of India and in local newspapers.
3. The public sends objections and suggestions, and public sittings (open hearings) are held in the state.
4. The final order is published in the Gazette.
5. The order is placed before the Lok Sabha or the state assembly, but the House cannot change it.

• Legal force: the commission's orders have the force of law.
• Court review is limited: under Art. 329(a), courts generally cannot question delimitation. A 2024 Supreme Court ruling allows review only when an order is manifestly arbitrary (plainly unreasonable) or goes against constitutional values.

The freeze: the main limit on delimitation

• Freeze on delimitation: a constitutional rule that stops each state's number of seats from changing, even after a new census.
• Why it was brought in: states that controlled their population, mostly in the south, should not lose seats to states whose population grew faster.

• Without the freeze, success in family planning would be punished.

• What the freeze allows: boundaries and SC/ST reserved seats can still be redrawn inside a state.

• What the freeze blocks: seats cannot move between states.
• Result: seat shares based on 1971 no longer match today's population. Constituency sizes are now very unequal across states.

In the Constitution and practice

Constitutional basis

Provision	What it says
Art. 81	Sets the size of the Lok Sabha. The maximum is 550: up to 530 from states and up to 20 from Union Territories [3]. Seats are given to states in proportion to population, as far as practicable.
Art. 82	After each census, seats and boundaries are readjusted by an authority that Parliament sets up by law.
Art. 170	Does the same for state Legislative Assemblies (minimum 60, maximum 500 members).
Arts. 330 and 332	Reserve seats for SCs and STs in the Lok Sabha and the assemblies, in proportion to their population.
Art. 329(a)	Courts cannot question laws on delimitation or on the allotment of seats.

Amendments on the freeze

Amendment	What it did
42nd, 1976	Froze each state's Lok Sabha and assembly seats at the 1971 census level until 2000.
84th, 2001	Extended the freeze until the first census after 2026. Allowed boundaries and SC/ST seats to be redrawn inside states, based on the 1991 census.
87th, 2003	Changed the basis of that redrawing to the 2001 census.

The four Delimitation Commissions

Delimitation Act	Census used	Note
1952	1951	First redrawing
1963	1961	—
1973	1971	Last change in each state's number of seats
2002	2001	Chaired by Justice Kuldip Singh; orders in force from 2008; could only redraw boundaries within states

• No commission between 1973 and 2002, because of the freeze.

Key cases and instances

• Meghraj Kothari v. Delimitation Commission (1967): the Supreme Court held that once a delimitation order is published, courts cannot question it.
• 2024 Supreme Court ruling: courts can review an order that is manifestly arbitrary or against constitutional values.
• North-east deferral (2008): delimitation was put off in Assam, Arunachal Pradesh, Manipur and Nagaland because of security concerns and court cases.
• Assam (2023):
• The Election Commission of India (ECI) delimited Assam itself, under Section 8A of the Representation of the People Act, 1950. This section lets the ECI delimit states where delimitation was put off [7].
• It published the final order on 11 August 2023, using the 2001 census [7].
• Seats stayed at 126 assembly seats and 14 Lok Sabha seats [7].

• It received 1,222 representations (objections and suggestions) and held three days of public hearings in Guwahati in July 2023 [7].

• Jammu & Kashmir (2020-22):

• The commission was chaired by Justice Ranjana Prakash Desai and worked under the J&K Reorganisation Act, 2019.
• It set 90 assembly seats: 43 in Jammu and 47 in Kashmir.
• It created ST-reserved seats in J&K for the first time.

The failed 2026 attempt

• Three Bills were introduced together in the Lok Sabha on 16 April 2026 [2][3]:
• the Constitution (131st Amendment) Bill, 2026;
• the Delimitation Bill, 2026;

• the Union Territories Laws (Amendment) Bill, 2026.

• What the 131st Amendment Bill proposed [3]:

• remove the freeze;
• remove the duty to delimit after every census, so that Parliament would choose which published census to use;
• raise the maximum size of the Lok Sabha from 550 to 850 (up to 815 from states, up to 35 from UTs);

• delink women's reservation from "the first census after 2023".

• What the Delimitation Bill proposed: the commission would use the latest census whose figures had been published, which in practice meant the 2011 census. Its chair could be a sitting or retired Supreme Court judge [2].

• Government's case: with a 50% increase in House size, the Lok Sabha would grow from 543 to 816 and the southern states from 129 to 195 seats. Their share would stay at about 24% [8].
• Outcome:
• The 131st Amendment Bill was negatived (voted down) on 17 April 2026 [4].

• The other two Bills became infructuous (pointless), because they depended on it [2][4].

• Why it was hard to pass:

• It needed a special majority under Art. 368(2): a majority of each House's total membership and two-thirds of members present and voting.

• A change to the "representation of States in Parliament" also needs ratification by at least half of the state legislatures.

• Where things stand now: the 84th Amendment's freeze still applies. It ends once the figures of Census 2027 are published. Parliament must then pass a new Delimitation Act or amend the Constitution again.

• Census 2027 reference date (the moment the count describes): 00:00 hours, 1 March 2027. For Ladakh and the snow-bound areas of J&K, Uttarakhand and Himachal Pradesh, it is 1 October 2026 [6].
• The census will be held in two phases and will also count castes [6].

Don't confuse with

• Delimitation vs. the freeze on delimitation: delimitation is the act of redrawing seats. The freeze only stops seats from moving between states. Boundaries inside a state were still redrawn in 2002-08.
• Delimitation Commission vs. Election Commission of India: the Delimitation Commission is a separate body that Parliament sets up by law for each round. The ECI conducts elections. It delimits only in special cases, under Section 8A of the RPA, 1950 (Assam, 2023) [7].
• Delimitation vs. gerrymandering: delimitation is neutral redrawing by an independent commission to equalise population per seat. Gerrymandering is partisan redrawing (done to favour one party or group).
• Art. 82 vs. Art. 170: Art. 82 covers Lok Sabha seats. Art. 170 covers state Legislative Assembly seats.

Prelims Hooks

• Art. 82 = readjustment after each census by an authority set up by Parliament. Art. 170 = the same for assemblies. Art. 329(a) = courts cannot question delimitation laws.
• 42nd (1976) froze seats on the 1971 census until 2000. 84th (2001) extended the freeze until the first census after 2026. 87th (2003) moved boundary redrawing to the 2001 census.
• Four commissions: 1952, 1963, 1973, 2002. Kuldip Singh chaired the 2002 commission. Ranjana Prakash Desai chaired the J&K commission (90 seats: 43 Jammu, 47 Kashmir).
• Meghraj Kothari (1967): delimitation orders cannot be challenged in court once published.
• Trap: associate members (5 MPs and 5 MLAs per state) cannot vote. Parliament or the assembly cannot change a final order.
• Trap: the 131st Amendment Bill, 2026 (maximum Lok Sabha size 850) was negatived on 17 April 2026. It is not law. The maximum is still 550 [3][4].

Mains Points

• Equality vs. federal fairness:
• "One person, one vote, one value" calls for seats by population.
• But under a purely population-based reallocation, Tamil Nadu would fall from 39 to 32 seats, while Uttar Pradesh would rise from 80 to 89 and Bihar from 40 to 46 [2].
• So states that met national population goals would lose political voice.

• Middle paths: enlarge the House so no state loses seats (the new Lok Sabha chamber can seat 888) [8], use a weighted formula, or extend the freeze again, as Tamil Nadu's Joint Action Committee of states demanded in March 2025.

• Limits of a bigger House:

• Even an 850-member Lok Sabha [3] would still shift relative power northward. UP and Bihar together would rise from 22% to 25% of seats [5].
• A bigger House may also make debate harder and give each MP less time to speak.
• The Rajya Sabha or decentralisation could be used to balance this.

• The 2026 failure shows that the special majority and state ratification under Art. 368 require wide, inter-state consensus [4].

• Women's reservation is stuck:

• The 106th Amendment (2023) reserves one-third of seats for women.
• But it begins only after a delimitation based on the first census after 2023 [3].
• So the delimitation dispute now holds up women's reservation.
• Delinking the two would let women's reservation begin sooner.

Related concepts

• Delimitation Commission
• Freeze on delimitation
• Gerrymandering

Read more

• Delimitation: equal votes and the post-2026 question