Structure of State Legislature in India: Unicameral vs Bicameral System Explained

1. Introduction

In the constitutional scheme of India, the state legislature is the primary law-making organ of a state government. Formulated under Part VI (Chapter III) of the Constitution of India (Articles 168 to 212), the provisions govern the organization, composition, duration, officers, procedures, privileges, and powers of state legislatures.

While the Constitution mandates a parliamentary form of governance at both the central and state levels, it does not enforce structural uniformity on state legislatures. Recognizing India’s profound diversity in terms of population, geographic area, economic development, and historical trajectory, the framers of the Constitution left the choice of adopting a unicameral system (a single chamber) or a bicameral system (two chambers) to the discretion of individual states.

Unicameral Legislature: A state legislature consisting of a single house—the Legislative Assembly (Vidhan Sabha).
Bicameral Legislature: A state legislature consisting of two houses—the Legislative Assembly (Vidhan Sabha) as the lower house, and the Legislative Council (Vidhan Parishad) as the upper house.

As of 2026, out of 28 states, only six states possess a bicameral legislature. These are:

Andhra Pradesh
Bihar
Karnataka
Maharashtra
Telangana
Uttar Pradesh

The remaining 22 states, as well as the Union Territories with legislatures (Delhi, Puducherry, and Jammu & Kashmir), are unicameral.

2. Historical and Constitutional Evolution

Pre-Constitutional Roots

Subnational bicameralism in India trace its origin to British colonial rule:

The Government of India Act, 1919: Introduced bicameralism at the national level (comprising the Council of State and the Legislative Assembly).
The Government of India Act, 1935: Extended this structure to the provinces. It established bicameral legislatures in six provinces: Bengal, Bombay, Madras, Bihar, Assam, and the United Provinces.

Constituent Assembly Debates

The question of whether independent India's provinces should have a second chamber was a point of intense debate in the Constituent Assembly:

Arguments in Favor (The Revisionist View): Proponents argued that a second chamber acts as a check on hasty, impulsive, and majoritarian legislation passed by a directly elected lower house. It provides a platform for experts, intellectuals, and professionals who might hesitate to face the rigors of direct popular elections.
Arguments Against (The Populist/Fiscal View): Skeptics, led by critics like Prof. K. T. Shah, argued that an upper house is an unnecessary luxury. They contended it causes needless legislative delays, drains the public exchequer with additional salaries/allowances, and serves as a "backdoor entry" for political allies and defeated election candidates who lack popular support.

The Democratic Compromise (Article 169)

To reconcile these views, the Constituent Assembly adopted a flexible, middle-ground solution. They did not impose a second chamber on any state, nor did they permanently ban it. Instead, they incorporated Article 169, which empowers the Union Parliament to create or abolish the Legislative Council of a state, provided the concerned State Legislative Assembly initiates the process by passing a resolution with a special majority.

3. Constitutional Mechanics: Creation & Abolition of Legislative Councils (Article 169)

Article 169 provides a unique mechanism that balances state initiative with federal oversight.

The Step-by-Step Procedure

Initiation by the State: The Legislative Assembly of the state must pass a resolution requesting Parliament to either establish a Legislative Council (if the state is unicameral) or abolish it (if the state is already bicameral).
Special Majority Required: This resolution must be passed by the State Assembly by a special majority:
- A majority of the total membership of the Assembly, and
- A majority of not less than two-thirds of the members of the Assembly present and voting.
Parliamentary Enactment: Once the resolution is received, the Union Parliament may pass an enabling Act to create or abolish the Council.
Simple Majority in Parliament: Crucially, the parliamentary bill for this purpose requires only a simple majority (a majority of members present and voting in both the Lok Sabha and the Rajya Sabha), just like any ordinary piece of legislation.
Assent of the President: The bill becomes law upon receiving the assent of the President of India.

                  PROCEDURAL FLOWCHART (Article 169)
                  
            ┌────────────────────────────────────────┐
            │   State Legislative Assembly passes    │
            │     Resolution for Council creation    │
            │              or abolition              │
            └───────────────────┬────────────────────┘
                                │
                                ▼ [Requires SPECIAL MAJORITY]
            ┌────────────────────────────────────────┐
            │  (a) Majority of Total Membership AND  │
            │  (b) 2/3rd of Members Present & Voting │
            └───────────────────┬────────────────────┘
                                │
                                ▼ [Resolution forwarded to Parliament]
            ┌────────────────────────────────────────┐
            │     Union Parliament passes Bill       │
            │      (Requires SIMPLE MAJORITY)        │
            └───────────────────┬────────────────────┘
                                │
                                ▼ [Assent given]
            ┌────────────────────────────────────────┐
            │         President of India             │
            └───────────────────┬────────────────────┘
                                │
                                ▼ [Implementation]
            ┌────────────────────────────────────────┐
            │      Legislative Council Created       │
            │              or Abolished              │
            └────────────────────────────────────────┘

The Constitutional Nuance

Under Article 169(3), any law passed by Parliament to create or abolish a Legislative Council is not deemed to be an amendment of the Constitution for the purposes of Article 368. It avoids the complex procedures of constitutional amendment (such as ratification by other states) and can be modified or repealed via ordinary legislative processes.

4. Detailed Profiles of the Two Houses

A. The Legislative Assembly (Vidhan Sabha) — The Popular Chamber

The Legislative Assembly is the dominant, directly elected chamber of the state legislature, representing the immediate popular will of the electorate.

Composition (Article 170): Members are directly elected by the citizens of the state based on universal adult franchise from territorial constituencies.
Numerical Strength:
- Maximum Limit: 500 members.
- Minimum Limit: 60 members.
- Exceptions: To ensure viable democratic representation in smaller states, the Constitution permits lower numbers: Sikkim (32), Goa (40), Mizoram (40), and the Union Territory of Puducherry (30).
Territorial Delimitation: The state is divided into territorial constituencies such that the ratio between the population of each constituency and the number of seats allotted to it is, as far as practicable, uniform across the state.
Abolition of Nominated Seats: Previously, under Article 333, a state Governor could nominate one member of the Anglo-Indian community to the Assembly if they were underrepresented. This provision was abolished by the 104th Constitutional Amendment Act, 2019 (effective January 2020).
Duration: The normal term is five years from the date of its first meeting. It can be dissolved earlier by the Governor. Its term can also be extended during a National Emergency by Parliament for up to one year at a time.

B. The Legislative Council (Vidhan Parishad) — The Scrutinizing Chamber

The Legislative Council is the permanent, indirectly elected upper house of the state. Like the Rajya Sabha, it is a continuing chamber not subject to dissolution; one-third of its members retire every two years, giving each member a six-year term.

Numerical Strength (Article 171):
- Maximum Limit: It cannot exceed one-third (1/3rd) of the total membership of the Legislative Assembly of that state.
- Minimum Limit: It cannot be less than 40 members.
Manner of Election & Nomination (The Fractional System): The composition of the Council is highly diverse and represents various societal and professional stakeholders. Under Article 171(3), the composition is broken down as follows:

                      ┌────────────────────────────────────────┐
                      │    COMPOSITION OF VIDHAN PARISHAD      │
                      │             (Art. 171)                 │
                      └──────────────────┬─────────────────────┘
                                         │
        ┌──────────────────┬─────────────┴──────┬───────────────────┬────────────────┐
        ▼                  ▼                    ▼                   ▼                ▼
   ┌──────────┐       ┌──────────┐         ┌───────────┐       ┌───────────┐    ┌──────────┐
   │  1/3rd   │       │  1/3rd   │         │  1/12th   │       │  1/12th   │    │  1/6th   │
   │Elected by│       │Elected by│         │Elected by │       │Elected by │    │Nominated │
   │  Local   │       │  MLAs    │         │ Graduates │       │ Teachers  │    │  by the  │
   │Bodies [1]│       │   [2]    │         │    [3]    │       │    [4]    │    │Gov. [5]  │
   └──────────┘       └──────────┘         └───────────┘       └───────────┘    └────┬─────┘
                                                                                     │
                                                                                     ▼
                                                              
                                                              
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### Recommended Books

You can explore these highly recommended resources for a deeper understanding.

- [Indian Polity (English) by M Laxmikanth for UPSC CSE 2025 | 7th edition (latest) | Civil Services Exam - Prelims, Mains and Interview | State PSCs exams/ PCS exams](https://amzn.to/4kFyeWt) - by M Laxmikanth
- [Oswaal NCERT One For All Book for UPSC & State PSCs | Indian Polity Classes 6-12 ](https://amzn.to/4ksSMRI) - by Oswaal Editorial Board
- [Bharat Ki Rajvyavastha (भारत की राजव्यवस्था) ](https://amzn.to/4kF4etL) - M Laxmikanth for UPSC CSE