Examine the institutional mechanisms available for resolving inter-state cost-sharing disputes in large multi-state irrigation projects.

Multi-state irrigation projects distribute costs and benefits unevenly — the dam-hosting state bears submergence, while downstream states reap irrigation. India therefore relies on a layered architecture: constitutional adjudication under Article 262, statutory tribunals, project-level authorities, and executive negotiation. The July 2026 Narmada settlement shows all three tiers at work.

Adjudicatory mechanism: tribunals

• Article 262 bars Supreme Court jurisdiction; Parliament enacted the Inter-State River Water Disputes Act, 1956, under which ad hoc tribunals are constituted [1].
• The Narmada Water Disputes Tribunal (NWDT), in its 1979 Award, did not merely allocate water — it fixed the cost-apportionment formula: Sardar Sarovar dam cost split 43.9% irrigation : 56.1% power, Gujarat–Rajasthan irrigation cost in an 18:1 ratio, and Gujarat bearing 17.63% of Narmada Sagar cost for regulated releases [2].
• The ISRWD (Amendment) Act, 2019 proposes a single permanent tribunal with benches plus a pre-litigation Dispute Resolution Committee, addressing delay and forum multiplicity [3].

Implementation mechanism: project authorities

• The Narmada Control Authority (NCA), functional since 20 December 1980, is the standing body corporate that operationalises the Award — monitoring dam works, releases and rehabilitation — and is funded equally by the four party states [2].
• Power benefits are similarly pre-fixed (MP 57%, Maharashtra 27%, Gujarat 16%), converting a recurring dispute into an accounting rule [2].

Executive-federal mechanism: negotiated settlement

• Awards fix ratios but not accumulated arrears. The 7 July 2026 agreement among Madhya Pradesh, Gujarat, Maharashtra and Rajasthan cleared pending Sardar Sarovar dues through a one-time settlement, brokered by the Union Home Ministry alongside Jal Shakti [4].
• This route avoids protracted litigation, but its success depends on political convergence rather than institutional certainty.

Cost-sharing disputes are thus resolved not by one body but by a continuum — tribunal for the formula, authority for daily implementation, negotiation for residual dues. Strengthening this continuum requires operationalising the 2019 single-tribunal framework, empowering river-basin authorities with financial adjudication powers, and institutionalising mediation before arrears accumulate. Cooperative federalism, as envisaged in Article 262's design, works best when negotiation supplements — rather than substitutes for — a credible adjudicatory backstop.