Constitution of India
Article 170: Composition of the Legislative Assemblies
Part VI — The States (Chapter III — The State Legislature, General)
Clause (1)
WHAT IT SAYS: The Legislative Assembly of each State shall have not more than 500 and not less than 60 members, chosen by direct election from territorial constituencies, subject to Article 333 (Anglo-Indian nomination). WHAT IT MEANS: 1. Sets the absolute ceiling (500) and floor (60) for Vidhan Sabha strength. 2. Mandates DIRECT election only — no indirect election or nomination (except Art. 333). 3. Elections must be from TERRITORIAL constituencies — rules out communal/occupational electorates. 4. Exceptions exist for smaller states (e.g., Goa 40, Sikkim 32, Mizoram 40) via special laws. KEY DOCTRINE: Principle of direct democratic representation at the State level — one person, one vote in territorial constituencies.
Clause (2) with Explanation
WHAT IT SAYS: Each State shall be divided into territorial constituencies so that the ratio of population to seats is, as far as practicable, the same throughout the State. — Explanation: 'Population' means population as per the last published census. — Proviso: Until the first census after 2026 is published, 'last preceding census' shall mean the 2001 census. WHAT IT MEANS: 1. Ensures population parity across constituencies within a State. 2. Currently, constituency boundaries are drawn based on 2001 census figures. 3. The freeze was introduced by 42nd Amendment (1976), extended by 84th (2001) and updated by 87th (2003). 4. Purpose: Prevent southern States (which controlled population growth) from losing seats to northern States. KEY DOCTRINE: Principle of equal representation — equal population per constituency, subject to the delimitation freeze.
Clause (3) with three Provisos
WHAT IT SAYS: After each census, total seats in each State Assembly AND territorial constituencies shall be readjusted by an authority determined by Parliament. — Proviso 1: Readjustment shall NOT affect representation until the existing Assembly is dissolved. — Proviso 2 (42nd Amdt): Readjustment takes effect from a date specified by the President; elections may continue on old constituencies until then. — Proviso 3 (84th Amdt): Until first post-2026 census is published, NO readjustment needed of — (i) total seats (frozen at 1971 census levels), (ii) territorial constituencies (frozen at 2001 census levels). WHAT IT MEANS: 1. Parliament, NOT State Legislatures, controls delimitation (changed from original draft via 14 Oct 1949 amendment). 2. Delimitation Commission is the 'authority' Parliament creates (Acts of 1952, 1962, 1972, 2002). 3. Full seat reallocation among States is constitutionally frozen until post-2026 census. 4. Only boundary readjustment WITHIN States (based on 2001 census) has been permitted. KEY DOCTRINE: Delimitation Freeze Doctrine — balancing population control policy incentives against equal representation.
Constitutional Inspiration
SOURCE(S): 1. Government of India Act, 1935 — Sections 18–19 (composition of Provincial Legislative Assemblies) Original provision: Provincial assemblies were composed of members directly elected from territorial constituencies, with size varying by province. What India kept: Direct election from territorial constituencies; Parliament-determined readjustment mechanism. 2. United Kingdom — House of Commons model Original provision: First-past-the-post system with periodic boundary redistribution by Boundary Commissions. What India kept: FPTP system, periodic delimitation tied to census, independent delimitation authority. INDIA'S SPECIFIC ADAPTATIONS: 1. Fixed constitutional ceiling of 500 and floor of 60 — To prevent unwieldy legislatures in large states while ensuring minimum representation in smaller ones. 2. Constitutional mandate for population-based parity across constituencies — Framers wanted to constitutionally embed equal representation, unlike the UK where it is statutory. 3. Delimitation freeze mechanism (42nd, 84th, 87th Amendments) — Unique Indian innovation to incentivize population control in southern states without penalizing them through reduced representation. 4. Special exceptions for smaller states below the 60-member floor — Recognizes India's vast diversity in state sizes, a feature not found in most foreign constitutions.
Constituent Assembly Debate
DEBATED ON: 6, 7, 8 January 1949 and 14 October 1949 (CAD Volumes VII and X) Draft Article number: 149 KEY SPEAKERS: 1. Dr. B.R. Ambedkar (Chairman, Drafting Committee) — Moved amendment to set minimum 60 and maximum 450 members; later withdrew this amendment in favour of an alternative formula. 2. T.T. Krishnamachari (Madras) — Proposed that readjustment powers be vested in Parliament, not State Legislatures, for uniformity with Draft Article 290 (Article 327). 3. A member proposed one representative for every 75,000 residents — This formula was accepted by the Assembly. 4. Kuladhar Chaliha and Rev. J.J.M. Nichols-Roy (Assam) — Proposed exclusion of autonomous districts of Assam and Shillong cantonment to protect tribal representation. MAJOR DISAGREEMENTS: 1. Fixed numbers vs. population ratio — Ambedkar initially wanted fixed limits (60–450), but the Assembly preferred a population-based formula of 1 member per 75,000 residents. 2. State vs. Parliament control of delimitation — Original draft gave readjustment power to State Legislatures; on 14 October 1949, this was transferred to Parliament. 3. Tribal representation — Concern that autonomous districts with mixed populations would disenfranchise tribals. FINAL OUTCOME: Assembly adopted population-ratio formula on 8 January 1949; on 14 October 1949, clause (2) on adult suffrage was deleted (moved to Art. 326), and readjustment power was shifted from State Legislatures to Parliament.
Landmark Judgments
LANDMARK JUDGMENTS: 1. K. Purushottam Reddy v. Union of India (2025) — SC held that Article 170(3) proviso is an absolute constitutional bar on delimitation in ANY State until first post-2026 census is published; statutory promises in AP Reorganisation Act 2014 cannot override it. 2. R.C. Poudyal v. Union of India (1993) — 5-judge bench held that Article 170 embodies the rule of 'fair and effective representation'; the 'one person, one vote' principle is a broad democratic ideal, not an inflexible arithmetic mandate. 3. Kuldip Nayar v. Union of India (2006) — Reaffirmed importance of free and fair elections and upheld constitutional validity of representation methods, emphasising population-based representation. 4. Meghraj Kothari v. Delimitation Commission (1967) — Upheld that delimitation orders are treated as law and cannot be questioned in courts once finalized. NOTABLE DISSENTS: 1. Justice L.M. Sharma (CJI) in R.C. Poudyal (1993) — Raised concerns that separate electorates (Sangha seat in Sikkim) could undermine democratic foundations of equal representation under Article 170. SCHOLARS & JURISTS: 1. D.D. Basu — Article 170 is the State-level counterpart of Article 81 (Lok Sabha composition); both operate on the same principle of population-based territorial representation. 2. M.P. Singh — The delimitation freeze under Article 170(3) represents a unique Indian experiment in balancing demographic equity with policy incentives for population stabilization.