The Overlapping Powers of Centre and State That UPSC Loves to Set Traps Around

Every year, UPSC sets at least two or three questions where aspirants confuse who has the power — the Centre or the State. The confusion is intentional, and the Indian Constitution itself creates this grey zone through a carefully designed federal scheme that distributes, shares, and sometimes overlaps legislative authority between the Union and the States.

I have been teaching Indian Polity for over fifteen years, and I can tell you with certainty that this is the single area where the most negative marking happens in Prelims. Let me walk you through the entire framework so you never fall into these traps again.

Where This Topic Sits in the UPSC Syllabus

This topic falls squarely within the core of Indian Polity. It is tested in both Prelims and Mains with high frequency. Here is the exact placement:

Exam Stage	Paper	Syllabus Section
Prelims	General Studies Paper I	Indian Polity and Governance — Constitution, Federal Structure
Mains	GS Paper II	Functions and Responsibilities of the Union and the States, Issues and Challenges in Federal Structure

Related topics you must study alongside this include the Seventh Schedule, Article 246, Article 249-254, Doctrine of Repugnancy, Residuary Powers, and President’s Rule under Article 356. Questions from this cluster have appeared in UPSC at least 15-20 times over the last decade across Prelims and Mains combined.

The Three Lists — The Foundation You Must Get Right

The Seventh Schedule of the Constitution divides legislative subjects into three lists. The Union List contains 97 subjects (originally 97, now renumbered to 100) on which only Parliament can make laws. Defence, atomic energy, banking, and foreign affairs sit here. The State List contains 66 subjects like police, public health, agriculture, and land. The Concurrent List contains 52 subjects where both Parliament and State Legislatures can legislate.

The Concurrent List is where the overlap lives. Subjects like education, forests, trade unions, electricity, criminal law, marriage and divorce, bankruptcy, and population control fall here. Both levels of government can pass laws on these subjects. This is the trap zone for UPSC.

Why the Concurrent List Exists at All

B.R. Ambedkar and the framers of the Constitution borrowed this idea from the Australian Constitution. They wanted national uniformity on certain subjects while still allowing States to address local needs. Think of it this way — criminal law needs a common framework across India, but a State might need specific provisions for local conditions. The Concurrent List allows both to coexist.

Before the 42nd Amendment of 1976, education and forests were State subjects. They were transferred to the Concurrent List during the Emergency. This is a fact that UPSC has directly tested multiple times. Many aspirants still incorrectly mark education as a State subject.

The Doctrine of Repugnancy — Article 254

When both Parliament and a State Legislature pass laws on the same Concurrent List subject, and these laws contradict each other, which one prevails? Article 254 provides the answer through what is called the Doctrine of Repugnancy.

The rule is simple: the Central law prevails, and the State law becomes void to the extent of the inconsistency. However, there is a critical exception. If the State law was reserved for the President’s consideration and received Presidential assent, the State law prevails in that State. But Parliament can still override this by passing a new law on the same subject later.

This layered mechanism is where UPSC loves to test. The question will typically present a scenario and ask which law prevails. Remember the hierarchy: Central law wins by default, unless the State law has Presidential assent, and even that can be overridden by a subsequent Central law.

Residuary Powers — The Hidden Overlap

Article 248 grants residuary powers to Parliament. Any subject not mentioned in any of the three lists falls under Parliament’s jurisdiction. This is different from the United States, where residuary powers rest with the States. UPSC often tests this comparison.

The tricky part is that subjects like cyber crimes, space technology regulation, and cryptocurrency do not appear in any list because the Constitution was drafted in 1949. These fall under residuary powers and hence under Parliament. Many aspirants wrongly assume these are State or Concurrent subjects.

Parliament Entering State List Territory — The Five Exceptional Situations

UPSC frequently tests the conditions under which Parliament can legislate on State List subjects. There are five such situations, and confusing them is a common mistake:

• Article 249 — Rajya Sabha passes a resolution by two-thirds majority that it is necessary in national interest. The law remains valid for one year and can be extended.
• Article 250 — During a National Emergency under Article 352, Parliament can legislate on any State subject.
• Article 252 — If two or more State Legislatures pass resolutions requesting Parliament to legislate on a State subject, Parliament can do so. This applies only to those consenting States.
• Article 253 — To implement international treaties and agreements, Parliament can legislate on any subject, including State List items.
• Article 356 — During President’s Rule in a State, Parliament assumes the State Legislature’s powers.

The trap here is often in the details. For instance, under Article 249, the resolution must come from Rajya Sabha, not Lok Sabha. Under Article 252, the law applies only to consenting States, not all States. These fine distinctions are exactly what UPSC tests.

Real Traps from Previous Year Papers

Q1. Which of the following subjects was transferred to the Concurrent List by the 42nd Amendment?
(UPSC Prelims 2018 Pattern — GS Paper I)
Answer: Education and Forests were transferred from the State List to the Concurrent List by the 42nd Constitutional Amendment Act, 1976. Weights and Measures was already in the Union List, and this option is commonly used as a distractor. The examiner tests whether you know the original placement of education.

Q2. Consider the following statements about Residuary Powers: 1) They belong to State Legislatures. 2) They are defined under Article 248. Which is correct?
(UPSC Prelims 2019 Pattern — GS Paper I)
Answer: Only statement 2 is correct. Residuary powers belong to Parliament, not to States. This is a direct comparison trap with the American federal model where residuary powers rest with States.

Q3. “The Indian federal scheme, while providing for a strong Centre, does not reduce States to mere appendages.” Discuss with reference to the legislative relations between the Union and States.
(UPSC Mains 2022 Pattern — GS Paper II)
Answer approach: This requires you to explain the three-list structure, acknowledge the Centre’s dominance through residuary powers and the Concurrent List, but also highlight how Articles 252 and 254 (with Presidential assent exception) protect State autonomy. Use examples like GST (where States had to be compensated) and NEET (where Tamil Nadu resisted a uniform exam). A balanced answer acknowledges the cooperative and coercive aspects of Indian federalism.

Key Points to Remember for UPSC

• The Concurrent List has 52 subjects where both Centre and States can legislate — in case of conflict, the Central law prevails under Article 254.
• Education and Forests were moved to the Concurrent List by the 42nd Amendment (1976) — they were originally State subjects.
• Residuary powers under Article 248 belong to Parliament, unlike in the USA where they belong to States.
• A State law on a Concurrent subject can prevail over a Central law only if it has received Presidential assent — and even then, a later Central law can override it.
• Article 249 requires a Rajya Sabha resolution by two-thirds majority for Parliament to legislate on State subjects in national interest.
• Article 253 allows Parliament to legislate on any subject to implement international treaties — this has no restriction from the State List.
• Under Article 252, Parliament’s law applies only to the consenting States, not to all States across India.

Understanding the distribution of legislative powers is not just about memorising lists. It is about grasping the logic of Indian federalism — why the framers created overlaps, how conflicts are resolved, and where the Centre’s authority ends and begins. I would suggest you make a comparison chart of Articles 245 to 254 and revise it every two weeks until the exam. Once you see the pattern in how UPSC frames these questions, you will find that the traps become predictable and avoidable.