The Indus Waters Treaty of 1960 stands as one of the most carefully negotiated and legally robust transboundary water agreements in modern international law.

Concluded between Pakistan and India with the good offices of the World Bank, the Treaty was designed to remove water from the volatility of politics and conflict and to anchor it firmly in law, engineering discipline, and neutral dispute resolution. It is not a political understanding subject to shifting bilateral moods, but a binding international instrument governed by the foundational principle of pactasuntservanda—that treaties must be honoured in good faith.

Its endurance through wars, military crises, and prolonged diplomatic breakdowns testifies to its legal clarity and resilience. Today, however, the Treaty faces an unprecedented challenge, not from interpretive ambiguity but from India’s unilateral conduct and rejection of treaty-mandated adjudication. At the heart of the Treaty lies a permanent and unqualified allocation of rivers. Article II vests the eastern rivers—Ravi, Beas, and Sutlej—exclusively in India, while Article III accords Pakistan exclusive rights over the western rivers—Indus, Jhelum, and Chenab. This allocation was the Treaty’s foundational bargain. India’s access to the western rivers is permitted only within the narrow confines of Article III(2), read with Annexures D and E, which allow limited, non-consumptive uses, principally run-of-the-river hydroelectric projects. These permissions are subject to strict design and operational constraints, including tight limits on pondage, prohibition of........

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