Inter-State Relations: water disputes, the Inter-State Council and Zonal Councils

The Centre-State Relations note on this site covers how the Union and a State deal with each other: legislative overlap, administrative direction, and who gets which tax. This chapter covers something different: how states deal with each other, without the Union necessarily standing between them. India's Constitution gives states no general right to sue or negotiate with one another the way sovereign countries do; it builds a handful of specific mechanisms instead, and UPSC has tested this chapter directly and recently. 2025's paper asked which of the Inter-State Council, the National Security Council and Zonal Councils is actually a constitutional body (only one is); 2024's paper tested the exact post-2002 composition of the North Eastern Council, a body most candidates lump in with Zonal Councils without realising it runs on a separate statute entirely. Both questions turn on precisely this kind of detail: which body is constitutional versus statutory, which minister chairs what, and since when. Where the Centre-State Relations note mentions the Inter-State Council, Zonal Councils or Article 262 only in passing, this note treats them as the primary subject, with their full composition, meeting record, and current status.

This chapter's material overlaps with NCERT Class 11, Indian Constitution at Work, Chapter 7 (Federalism). This note goes further than that chapter's coverage.

Inter-state water disputes (Article 262)

Water is a State List subject (Entry 17, List II), but that entry is itself made subject to Entry 56 of the Union List, under which Parliament can regulate and develop an inter-State river or river valley if it declares by law that doing so is expedient in the public interest. Article 262 supplies the adjudication route: Parliament may by law provide for adjudicating any dispute over the use, distribution or control of the waters of, or in, any inter-State river or river valley, and, notwithstanding anything else in the Constitution, may bar the Supreme Court and every other court from exercising jurisdiction over such a dispute. This is one of the few places the Constitution allows Parliament to oust the Supreme Court's jurisdiction outright, exactly why UPSC keeps circling back to it.

Parliament used this power in the Inter-State River Water Disputes Act, 1956. Under Sections 3 and 4, when a State believes a water dispute has arisen or is likely to arise, it can ask the Central Government to refer the matter to a Tribunal; if the dispute cannot be settled by negotiation, the Central Government must constitute a Water Disputes Tribunal within one year. Each Tribunal has a Chairman and two other members, nominated by the Chief Justice of India from sitting Supreme Court or High Court judges. Section 5 gives the Tribunal three years to decide, extendable by up to two more for unavoidable reasons. Once the Central Government gazettes the decision, Section 6 makes it final and binding, with the same force as a Supreme Court decree, and Section 11 bars every court from exercising jurisdiction over a dispute referred to a Tribunal. Nine such Tribunals have been constituted so far; five (Krishna-I, Godavari, Narmada, Cauvery and Mahadayi) have published, binding decisions, three (Ravi-Beas, Krishna Water Disputes Tribunal-II and Vansadhara) have decided but not yet been notified, and the Mahanadi Tribunal, constituted in 2018, is still adjudicating.

A correction worth getting right for Prelims: the widely repeated claim that a 2019 amendment created "a single permanent tribunal" is not current law. The Cabinet approved the Inter-State River Water Disputes (Amendment) Bill, 2019, and the Lok Sabha passed it on 31 July 2019. The Bill proposed a genuinely different architecture: a Disputes Resolution Committee (DRC) would first try to resolve a dispute amicably within one year (extendable by six months); failing that, the matter would go to a single, standing Tribunal with a chairperson, vice-chairperson, three judicial and three expert members, sitting in multiple benches, replacing every existing Tribunal, with a tighter two-year (plus one-year) deadline. But the Bill never cleared the Rajya Sabha. It lapsed when the 17th Lok Sabha was dissolved in 2024, and a fresh version has only been proposed for the 18th Lok Sabha. Until Parliament re-enacts it, the operative law remains the 1956 Act as amended up to 2002, with its ad hoc, judge-only tribunals and three-year (plus two-year) timeline. A question about what the "2019 amendment" established is testing whether you know it was never enacted; a question about what it proposed is testing the DRC and single-tribunal design instead.

Cauvery as the working example. The Cauvery Water Disputes Tribunal was constituted in 1990 and gave its final award in 2007; the Supreme Court modified that award by judgment on 16 February 2018. To implement it, the Central Government used its Section 6A power (to frame a scheme giving effect to a Tribunal's decision) to notify the Cauvery Water Management Scheme on 1 June 2018, setting up the Cauvery Water Management Authority and the Cauvery Water Regulation Committee as the standing bodies that now monitor monthly releases between Karnataka and Tamil Nadu. The dispute has resurfaced repeatedly since, most recently in 2025 and 2026 over Karnataka's proposed Mekedatu balancing reservoir, with Tamil Nadu insisting on strict adherence to the 2007 award as modified in 2018 before any fresh project is cleared. Article 262's machinery does not end a dispute permanently; it produces a binding award and a standing implementation body, and the underlying friction can resurface for decades. A separate statute, the River Boards Act, 1956, was also passed under Entry 56 for basin-level development boards rather than adjudication; it has stayed largely dormant and is not where UPSC's testable detail sits.

The Inter-State Council (Article 263)

Article 263 lets the President, if it appears to the public interest, establish by order a Council charged with inquiring into and advising on disputes between States, investigating subjects of common interest, and recommending better coordination of policy and action. Nothing here is automatic: the words are "if it appears" and "it shall be lawful for the President," a discretionary power, not a body that exists automatically the moment the Constitution commenced.

That discretion was exercised on the recommendation of the Sarkaria Commission on Centre-State Relations, chaired by Justice R.S. Sarkaria, which reported in January 1988 and recommended, in terms, that "a permanent Inter-State Council called the Inter-Governmental Council (IGC) should be set up under Article 263." The Government accepted this, and the Inter-State Council was established by Presidential Order dated 28 May 1990, first constituted by Gazette notification on 27 December 1990. That founding order has since been amended twice, in 1990 to let a Governor administering a State under President's Rule attend Council meetings, and in 1996 to let the Chairman nominate permanent invitees from among other Union Ministers. The Council consists of the Prime Minister as Chairman, the Chief Ministers of all States, the Chief Ministers of Union Territories with a Legislative Assembly (and the Administrators of those without one), and up to six Union Cabinet Ministers nominated by the Prime Minister; it was last reconstituted by Gazette notification on 8 November 2024, with the Union Home Minister named Chairman of its Standing Committee.

How often it has actually met is the part worth remembering. Since 1990, the Inter-State Council has met only eleven times. The early meetings, from the first in October 1990 through 2006, worked through the Sarkaria Commission's own recommendations chapter by chapter: financial relations, the Governor's role, emergency provisions, water disputes, and so on. A decade-long gap then preceded the eleventh meeting, held on 16 July 2016, which took up the recommendations of a second, later commission: the Punchhi Commission, chaired by Justice M.M. Punchhi, which reported in March 2010 and recommended the Council "must meet at least thrice in a year." No meeting has been held since 2016: a body meant to meet three times a year has not met even once in roughly a decade. This is exactly the kind of "how often has this actually happened" detail Prelims tests as a statement-based trap.

Zonal Councils: statutory, not constitutional

Zonal Councils are the single most common wrong-answer trigger in this chapter, because they sit right next to the Inter-State Council in every textbook table of contents and share a similar advisory purpose, but rest on entirely different legal footing. They were not created under Article 263 or any other constitutional provision. Jawaharlal Nehru first floated the idea in 1956, during debate on the States Reorganisation Commission's report, as a way to "develop the habit of cooperative working" among States about to be redrawn on linguistic lines. Parliament gave the idea legal form in Part III (Sections 15 to 22) of the States Reorganisation Act, 1956, and the five Councils were set up in 1957.

The five zones, in their current composition, are: the Northern Zonal Council (Punjab, Haryana, Himachal Pradesh, Rajasthan, the National Capital Territory of Delhi, Chandigarh, Jammu & Kashmir and Ladakh); the Central Zonal Council (Madhya Pradesh, Uttar Pradesh, Uttarakhand and Chhattisgarh); the Eastern Zonal Council (Bihar, Jharkhand, Odisha and West Bengal); the Western Zonal Council (Gujarat, Maharashtra, Goa and the Union Territory of Dadra & Nagar Haveli and Daman & Diu); and the Southern Zonal Council (Andhra Pradesh, Karnataka, Kerala, Tamil Nadu, Telangana and Puducherry). Note that Sikkim, once part of the Eastern Zonal Council, has since moved fully into the North Eastern Council below, and the eight north-eastern States sit outside the zonal system entirely.

Each Council's Chairman is the Union Home Minister (the same person chairs all five), its Vice-Chairman is a member State's Chief Minister, by rotation, for a one-year term, and its members are each State's Chief Minister plus two other ministers nominated by the Governor, along with the Administrators of the Union Territories in that zone. A Standing Committee of Chief Secretaries handles ongoing groundwork between full meetings. A Zonal Council is purely advisory, discussing and recommending action on matters of common economic or social planning interest, border disputes, linguistic minorities, inter-State transport, or anything arising from the 1956 reorganisation itself.

Zonal Councils met rarely through the 2000s before being explicitly repositioned, now described as changed "from advisory to action platform," with the Inter-State Council Secretariat organising the meetings. In the eleven years to late 2025, the Zonal Councils and their Standing Committees together held 63 meetings, far more active than the near-decade gaps in the 2000s record, and a useful contrast with the Inter-State Council's own near-total dormancy over the same period.

The North Eastern Council: a related but separate body

The eight north-eastern States, Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram, Nagaland, Sikkim and Tripura, do not belong to any of the five Zonal Councils. Their coordination runs instead through the North Eastern Council (NEC), set up under a wholly separate statute, the North-Eastern Council Act, 1971 (Act No. 84 of 1971), enacted on 30 December 1971 and in force from 1 August 1972. Like Zonal Councils, the NEC is statutory, not constitutional.

The original 1971 Act covered only the seven States existing at the time (Sikkim was not yet part of India). The North-Eastern Council (Amendment) Act, 2002 added Sikkim as the eighth member State and recast the NEC's function: it now operates as a regional planning body, required to prioritise projects benefiting two or more States, while formulating Sikkim-specific projects separately. After 2002, Section 3 of the Act sets the NEC's composition as the Governors of the member States, the Chief Ministers of all eight States, and up to three members nominated by the President, who also nominates the Chairman and may nominate a Vice-Chairman.

This is where the two real UPSC-tested facts meet, and where it is easy to blur two different dates together. Right after the 2002 amendment, the Council's Chairman was the Union Minister for the Development of the North Eastern Region (DoNER), not the Home Minister; the Home Minister was not part of its standard membership then. That changed on 13 June 2018, when the Union Cabinet approved "repositioning" the NEC, nominating the Union Home Minister as its ex-officio Chairman, with the DoNER Minister as Vice-Chairman, and expanding its remit to cross-border issues, trafficking and boundary disputes, the way Zonal Councils do elsewhere. That 2018 arrangement is the current position. A question anchored to "the 2002 amendment" is testing the pre-2018 position (DoNER Minister as chair); a question about today needs the 2018 repositioning. Section 5(1) of the Act requires the Council to meet at least twice a year, a lower bar than the Inter-State Council's, and one the NEC keeps to far more consistently.

Full faith and credit (Article 261)

Article 261 does for judicial and administrative acts what the trade provisions below do for commerce: it stops State boundaries from fragmenting the country's legal fabric. Clause (1) requires full faith and credit to be given, throughout India, to the public acts, records and judicial proceedings of the Union and of every State. Clause (2) leaves the manner of proving such acts and records, and their legal effect, to a law made by Parliament. Clause (3) is the practically important one: final judgments or orders passed by civil courts anywhere in India are capable of execution anywhere else in India, without a fresh suit to re-establish them. A decree a civil court in Kerala has passed can be executed directly against a defendant's property in Punjab; a State cannot treat another State's judicial proceedings as foreign and demand they be re-litigated from scratch.

Freedom of trade, commerce and intercourse (Articles 301 to 307)

Part XIII deals with a different kind of inter-State friction: States using their own legislative power to protect local trade at another State's expense. Article 301 lays down the default rule, that trade, commerce and intercourse throughout India shall be free, subject to the rest of Part XIII. Article 302 lets Parliament restrict that freedom, between one State and another or within any part of India, where required in the public interest. But Article 303 narrows it in one specific way: neither Parliament nor a State Legislature may use any Seventh Schedule trade-and-commerce entry to prefer one State over another or discriminate between States, and this bar applies even to Parliament acting under Article 302. The one carve-out, Article 303(2), lets Parliament make such a discriminatory law if it declares this necessary to deal with a scarcity of goods somewhere in India.

Article 304 gives States their own, narrower powers, despite Articles 301 and 303: a State Legislature may (a) tax goods imported from other States or Union Territories at the same rate as similar goods made within the State, without discriminating against the imported goods, and (b) impose reasonable restrictions on trade with or within that State, in the public interest. The trap sits in the proviso to clause (b): a Bill for that purpose cannot even be introduced without the President's previous sanction, tighter than the familiar Article 200 situation, where a State Bill is reserved for the President's assent only after it has already been passed. Article 305 saves existing laws and State monopoly laws from challenge under 301 and 303 unless the President directs otherwise. Article 306 (Part B States' trade powers) was omitted by the Seventh Amendment, 1956; Article 307 lets Parliament appoint an authority to carry out the purposes of Articles 301 to 304.

Quick revision points

• Article 262 (water disputes): Parliament can adjudicate inter-State river water disputes and bar courts from the matter. The operative law is the Inter-State River Water Disputes Act, 1956 (as amended to 2002): ad hoc Tribunals of sitting judges, one per dispute, three-year timeline (plus two). The 2019 Amendment Bill (single standing Tribunal, DRC pre-step, two-year timeline) passed the Lok Sabha in 2019 but lapsed in 2024 without Rajya Sabha passage; it is not current law. Cauvery: Tribunal 1990, award 2007, Supreme Court modification 2018, Cauvery Water Management Authority set up under Section 6A in June 2018.
• Article 263 (Inter-State Council): Discretionary, "may establish." Set up by Presidential Order, 28 May 1990, after the Sarkaria Commission's January 1988 recommendation. PM chairs it; six Union Cabinet Ministers, all State CMs, and UT CMs/Administrators are members. Met only eleven times since 1990; last meeting July 2016. The Punchhi Commission (2010) wanted it meeting thrice a year.
• Zonal Councils: Statutory, not constitutional, under Part III of the States Reorganisation Act, 1956; set up 1957. Five zones, each chaired by the Union Home Minister, Vice-Chairman a member State's CM by rotation. Sikkim moved out to the North Eastern Council; Telangana sits in the Southern zone.
• North Eastern Council: Statutory, under the North-Eastern Council Act, 1971; the eight north-eastern States sit outside the Zonal Council system entirely. 2002 amendment added Sikkim and made it a regional planning body; the DoNER Minister chaired it at that point. The Union Home Minister became ex-officio Chairman only from the June 2018 "repositioning," with the DoNER Minister as Vice-Chairman; do not read that arrangement back into the 2002 amendment.
• Article 261: full faith and credit to public acts, records and judicial proceedings of the Union and every State; a civil court's final judgment or order is executable anywhere in India without fresh litigation.
• Articles 301 to 307: trade is free throughout India (301); Parliament can restrict it in the public interest (302), but neither Parliament nor a State can discriminate between States via a trade or commerce entry (303), except to handle scarcity. States can levy non-discriminatory countervailing taxes on imported goods and impose reasonable restrictions in the public interest (304), but a Bill for the latter needs the President's previous sanction before introduction, not merely before assent.

Once the constitutional-versus-statutory line and the 2002-versus-2018 dates are fixed, this chapter's remaining risk is low: most wrong answers here come from conflating one body's legal basis, or one reform's actual enactment date, with another's.