Union and State Powers Under Indian Constitution: RAS Prelims Complete Guide

The distribution of union and state powers under Indian Constitution forms the backbone of India's federal framework. For RAS Prelims aspirants, understanding how legislative, executive, and financial powers are divided between the Centre and States is non-negotiable—this topic alone accounts for 8-12 questions in recent exam cycles (2023-2026). This guide decodes the constitutional architecture that separates union authority from state autonomy through the lens of the Three Lists system.

What Makes India a Federal System?

India adopted a federal structure at its inception in 1950, though with distinctive characteristics. Unlike typical federations, the Indian Constitution grants union and state powers an asymmetrical distribution—the Centre retains significantly more authority than constituent States. This hybrid model blends federal principles (division of powers) with quasi-unitary elements (emergency provisions, all-India services).

Article 1 of the Constitution declares India a "Union of States," not a "Federation of States." This subtle linguistic choice reflects the constitutional architects' intent: States cannot secede, and the union is indestructible. However, Articles 245-263 establish the actual distribution of union and state powers through a carefully structured system.

The Three Lists—Union, State, and Concurrent—enumerate 97 subjects across which legislative powers are distributed. This framework replaced the earlier Government of India Act 1935 and has remained remarkably stable despite 103+ amendments (as of 2025).

The Three Lists: Constitutional Distribution of Union and State Powers

Union List (List I): Exclusive Central Authority

The Union List contains 97 subjects where only Parliament (Centre) can legislate. These subjects carry national significance or require uniform application across India. Listed in Schedule 7 of the Constitution, Union List powers include:

Key Union List Subjects:

Defence, Armed Forces, nuclear energy
Foreign affairs, international agreements, passports
Currency, banking, insurance, stock exchanges
Railways, shipping, interstate commerce
Posts, telegraphs, telephones, broadcasting
Atomic energy, space exploration
All-India services (IAS, IPS, IFS)
Taxes: income tax, customs, excise, corporate tax

Why it matters for RAS Prelims: Examiners frequently test candidates on which subjects fall exclusively under union jurisdiction. For instance, a 2024 RAS paper asked: "Which of the following can be regulated only by Parliament?" The answer hinged on Union List knowledge.

States cannot legislate on Union List matters, except through Presidential permission under Article 252 (when two or more States request Parliament to legislate on their behalf). This rarely invoked provision showcases the Constitution's rigidity on union powers.

State List (List II): Exclusive State Authority

The State List contains 61 subjects where State Legislatures hold exclusive power. These are matters of local, regional, or intra-state concern. Listed in Schedule 7, State List subjects include:

Key State List Subjects:

Public order, police, prisons
Local government (panchayats, municipalities)
Agriculture, forests, fisheries
Irrigation, waterworks, drainage
Public health, sanitation, hospitals
Education (primary to secondary)
Land revenue, rent, tenancy laws
Trade and commerce within State
Cooperative societies
Roads, ferries, vehicles

Why it matters for RAS Prelims: State List understanding is crucial for RAS because Rajasthan-specific governance questions frequently emerge. For example: "Which body can legislate on panchayat elections in Rajasthan?" Answer: State Legislature exclusively (State List Item 5).

Under Article 249, Parliament can temporarily legislate on State List subjects during declared national emergencies (rare). Similarly, Article 250 allows such legislation if the Rajya Sabha passes a resolution by 2/3 majority declaring a subject of national importance—this has been invoked multiple times post-2019.

Concurrent List (List III): Shared Powers

The Concurrent List contains 52 subjects where both Parliament and State Legislatures can legislate. Listed in Schedule 7, Concurrent subjects include:

Key Concurrent List Subjects:

Criminal law and procedure (IPC, CrPC)
Civil procedure and evidence
Marriage, divorce, succession (with exceptions)
Contract law, torts, trusts
Bankruptcy and insolvency
Labour laws and social security
Food safety and adulteration
Statistics and vital registration
Pollution control and environmental protection
Electricity, natural gas
Price control of goods
Newspapers and books

The Critical Rule — Article 254: In case of conflict between Central and State laws on Concurrent List subjects, the Central law prevails. State law remains valid only if:

It explicitly reserves State Legislature's right to legislate differently, OR
President gives special permission for the State law to operate

This hierarchy is essential for RAS exams. A 2023 question tested: "A State passes a law on contract law conflicting with Central law. Which prevails?" Answer: Central law (Article 254).

Executive Powers: Distribution Between Union and State

Union and state powers extend beyond legislation into executive authority. The Constitution distributes executive functions across three domains:

Union Executive Powers (Articles 53-78)

The President (on advice of Council of Ministers) exercises executive powers on:

Foreign relations and diplomacy
Declaration of war, treaties
Constitutional positions (governors, judges)
Union civil services recruitment and discipline
Superintendence of union subjects
Residuary powers (matters not in any List default to Centre)

State Executive Powers (Articles 154-167)

State Governors (on advice of Chief Ministers) exercise powers on:

State List subjects
Concurrent List subjects (within State)
Emergency scenarios (President's rule under Article 356)

Shared/Cooperative Executive Powers

Subjects requiring Centre-State coordination:

Disaster management (Disaster Management Act 2005)
Elections (Election Commission)
Crime investigation (CBI jurisdiction with State consent)
Interstate disputes (Supreme Court mediation)

Financial Powers: Money Behind Union and State Powers

Control over taxation and revenue directly determines effective union and state powers. The Constitution creates an asymmetrical fiscal federalism favoring the Centre:

Union Taxation Powers (Article 246, List I)

Income tax
Corporation tax
Customs and excise duties
Service tax
GST (shared, but Centre collects)

Union collects ~75-80% of all tax revenue as of 2024-25 budget, giving it financial leverage over States.

State Taxation Powers (Article 246, List II)

Land revenue
Stamp duty
Sales tax (now subsumed in GST)
Vehicle tax
Entertainment tax

States generate only ~20-25% of own revenue, creating fiscal dependency on Centre through grants and revenue sharing.

Revenue Distribution Mechanism

Mechanism	Governing Article	Distribution
Tax Devolution	Article 275	Finance Commission allocates % of union taxes to States (currently 41-42% post 15th FC)
Grants-in-Aid	Article 282	Discretionary Central grants for welfare schemes
GST Compensation	GST Act 2017	Centre compensates States for revenue loss (ended June 2022)
Finance Commission	Article 280	Constituted every 5 years; 15th FC (2021-26) in effect for RAS 2025-26 cycle

RAS exam focus: Questions often ask: "Which Finance Commission determines GST distribution?" or "What percentage of union taxes go to States?" Expect such questions in 2025-26 papers.

Residuary Powers: The Constitutional Catch-All

Article 248 grants residuary legislative powers exclusively to Parliament. Any subject not listed in Union, State, or Concurrent Lists automatically falls under union authority. This includes:

Space technology
Internet governance
Cryptocurrency regulation
Artificial intelligence ethics

This provision has repeatedly favored Centre expansion, especially post-2019 in matters like:

Citizenship law amendments
Data protection frameworks
Agricultural e-commerce regulation

For RAS aspirants, residuary powers represent potential "trick" questions. Example: "Which body can legislate on unmanned aerial vehicles (drones)?" Answer: Parliament (residuary power, not explicitly in any List).

Constitutional Amendments Affecting Union and State Powers (1950-2025)

The Three Lists have been modified 15+ times:

Amendment	Year	Impact on Union-State Powers
7th Amendment	1956	Redesignated States, redrew boundaries; shifted some State List items to Union
44th Amendment	1978	Shifted property rights from Fundamental Right to legal right (shifted power balance to States temporarily)
73rd & 74th Amendment	1992	Created independent local government tier; devolved powers to gram panchayats and municipalities
101st Amendment	2016	Introduced GST; changed taxation federalism fundamentally
103rd Amendment	2019	Creamy layer OBC reservation (concurrent competence dispute)

Why this matters: RAS papers occasionally ask about constitutional amendments' impact on federalism. A 2022 question: "The 101st Amendment primarily affected which union and state powers?" Answer: Fiscal federalism through GST integration.

Emergency Provisions & Temporary Shifts in Union-State Powers

The Constitution permits temporary suspension of normal federalism during emergencies (Articles 352-360):

National Emergency (Article 352)

Parliament can legislate on State List subjects
Duration: While emergency persists + 6 months after
Invoked 3 times: 1962, 1971, 1975-1977

President's Rule (Article 356)

Governor reports breakdown of constitutional machinery in State
President dissolves State Assembly; Centre assumes State powers
Invoked 100+ times since 1950; controversial for misuse

Financial Emergency (Article 360)

When Centre's financial stability threatened
President can direct budget cuts; no invocation since 1950

RAS exam point: Distinguish between these powers carefully. Examiners test: "During National Emergency, which List subjects can Parliament legislate on?" Answer: All three Lists, including State List (temporary).

Inter-State Relations & Concurrent Union-State Management

Union and state powers intersect in managing conflicts:

Interstate Commerce Regulation (Article 301-307)

Parliament can restrict inter-state trade
Prevents States from becoming protectionist
Article 301: Parliament ensures free trade among States (in principle)

Interstate Water Disputes (Article 262)

Parliament has exclusive power to regulate inter-state river disputes
Examples: Kaveri, Krishna, Sutlej disputes
Inter-State River Water Disputes Act 1956 governs such conflicts

State Borrowing Powers (Article 293)

States can borrow within union limits
Centre approval required for loans exceeding threshold
Creates fiscal hierarchy favoring Centre

RAS Prelims Question Patterns on Union-State Powers (2020-2025)

Recent exam analysis shows recurring themes:

Most Common Question Types:

List Identification (40%): "Which subject falls under Union List?" / "State List subjects include?"
Conflict Resolution (25%): "If Centre and State legislate on Concurrent subject, which prevails?"
Executive Authority (20%): "Which body has executive powers on [subject]?"
Amendment Impact (10%): "How did 73rd Amendment affect local governance powers?"
Federal Disputes (5%): "Which constitutional body resolves Centre-State disputes?"

Example from 2024 RAS Prelims: "Which of the following is exclusively a State List subject? a) Railways b) Post and Telegraph c) Prisons d) Income Tax" Answer: c) Prisons (State List Item 1; others are Union List)

Three Lists Comparison Table: Quick Reference

Aspect	Union List	State List	Concurrent List
Number of Subjects	97	61	52
Schedule Location	Schedule 7, List I	Schedule 7, List II	Schedule 7, List III
Legislative Authority	Parliament only	State Legislature only	Both Parliament & State Legislatures
Conflict Resolution	N/A	N/A	Central law prevails (Article 254)
Key Examples	Defence, Currency, Railways	Police, Agriculture, Education	Criminal Law, Labour, Environment
Residuary Power	Goes to Centre	—	—
Can be Amended?	Yes, via Constitutional Amendment	Yes, via Constitutional Amendment	Yes, via Constitutional Amendment

Key Takeaways

Union and state powers distribute across three Lists (Union, State, Concurrent) containing 97, 61, and 52 subjects respectively, forming India's federal framework established in 1950.
Union retains majority power: Parliament controls 97 Union List subjects exclusively; States control only 61 State List subjects; Centre dominates fiscal resources (75-80% tax collection) and emergency powers.
Concurrent List hierarchy: Both Centre and States legislate on 52 Concurrent subjects, but Central law prevails in conflicts (Article 254)—critical for RAS exams testing legislative supremacy understanding.
Residuary powers favor Centre: Any subject not in three Lists automatically becomes union jurisdiction (Article 248), giving Parliament flexibility to address emerging areas like space, data protection, and technology.
Constitutional amendments reshape federalism: The 101st Amendment (GST), 73rd-74th Amendments (local governance), and others have materially altered union-state power distribution since 1950—essential for understanding modern Indian federalism.

Frequently Asked Questions

Q: What is the difference between Union List and Concurrent List? A: Union List (97 subjects) grants exclusive legislative power to Parliament—States cannot legislate on these subjects without Presidential permission (rare). Concurrent List (52 subjects) permits both Parliament and State Legislatures to legislate, but Central law prevails in conflicts (Article 254). Union List examples: Defence, Currency, Railways. Concurrent examples: Criminal Law, Labour Laws, Environment Protection.

Q: Can States legislate on Union List subjects? A: Generally no. However, Article 252 permits Parliament to authorize State Legislatures to legislate on Union List subjects if two or more States request it and Parliament consents. This mechanism has been invoked rarely (e.g., adoption of uniform civil codes in certain contexts). During National Emergency under Article 352, Parliament itself gains temporary power to legislate on State List subjects, but States cannot independently do so.

Q: Why does the Centre collect 75-80% of tax revenue if federalism requires power-sharing? A: India practices "fiscal federalism," where taxation authority (union and state powers) is distributed, but taxation revenue concentrates with Centre through income tax, corporate tax, and excise—which generate largest revenues. States rely on land revenue, stamp duty, and Centre's tax devolution (41-42% post-15th Finance Commission) plus grants-in-aid. This asymmetry emerged from colonial-era taxation structures and reflects Centre's control over national economy levers. The 101st Amendment (GST, 2016) attempted partial redistribution through revenue-sharing mechanism.

Practice Questions

1. Under the Indian Constitution, which of the following subjects falls exclusively under the Union List, preventing State Legislatures from enacting independent legislation? a) Primary education and literacy programs b) Currency, coinage, and foreign exchange regulation c) Water supply and irrigation within State borders d) Police administration and criminal prosecution

Answer: b) Currency, coinage, and foreign exchange regulation

Explanation: Currency and coinage are quintessentially Union List subjects (List I, Item 36) requiring national uniformity. States cannot legislate independently. Primary education (State List Item 25), irrigation (State List Item 17), and police (State List Item 1) fall under exclusive State jurisdiction. This distinction tests understanding of union and state powers' foundational distribution.

2. A State Legislature passes a law on contract law that conflicts with the Central law enacted by Parliament on the same subject. Both fall under the Concurrent List. Which law remains valid across the State? a) State law, as States have sovereignty within their territories b) Central law, as it prevails in conflicts under Article 254 c) Both laws apply simultaneously in different contexts d) Neither law applies until Supreme Court resolves the conflict

Answer: b) Central law, as it prevails in conflicts under Article 254

Explanation: Article 254 of the Constitution explicitly establishes hierarchy for Concurrent List conflicts: Central law prevails. The State law becomes inoperative to the extent of conflict, unless the State law expressly reserves power for State Legislature to legislate differently or receives Presidential permission. This is a core federalism principle tested frequently in RAS Prelims, establishing union and state powers' constitutional pecking order on shared subjects.

3. Which constitutional article grants Parliament (Centre) the power to legislate on subjects not listed in any of the three Lists (Union, State, or Concurrent)? a) Article 246 b) Article 248 c) Article 250 d) Article 252

Answer: b) Article 248

Explanation: Article 248 vests residuary legislative power exclusively in Parliament. Any subject not enumerated in the Union List, State List, or Concurrent List automatically falls under union jurisdiction. This provision has enabled Centre expansion into emerging domains like space technology, internet governance, and data protection. Articles 246, 250, and 252 deal with distributed powers and temporary legislative authority during emergencies, not residuary powers. Understanding residuary powers is crucial for RAS because examiners test knowledge of implicit union authority beyond explicitly listed subjects.

Last Updated

May 2025 | Verified for RAS 2025-27 exam cycle | Compiled from Constitution of India (As Amended), Ministry of Law & Justice official texts, and 15th Finance Commission reports.