The Indus Waters Treaty must continue to be honoured by India, a Hague-based tribunal has ruled, delivering a firm rebuke to New Delhi’s attempt to suspend the six-decade-old water-sharing pact with Pakistan. The Permanent Court of Arbitration announced on Monday that it found no legal grounds for India’s suspension of the agreement and ordered the country to limit construction work on a hydroelectric plant it is building in the Kashmir region.
Indus Waters Treaty – Background to the Dispute
India suspended the treaty in April 2025 following an attack that killed 26 people at a tourist site in Kashmir. New Delhi identified two of the three assailants as Pakistani nationals, a claim Islamabad has firmly denied. In the aftermath, India also began work to expand reservoir holding capacity at two hydroelectric projects in the region, a move widely regarded as its first concrete step toward operating outside the treaty’s framework.
Pakistan subsequently took legal action, arguing that India had no unilateral authority to suspend or terminate the agreement. The case was brought before the Permanent Court of Arbitration, an independent tribunal based in The Hague that has adjudicated disputes under the treaty in the past.
What the Permanent Court of Arbitration Decided
In a unanimous ruling, the tribunal stated that none of the grounds India had publicly cited could justify ending or suspending the accord. According to the court, the treaty remains fully in force, and India must continue to observe its obligations under the agreement, including provisions governing the design and operation of hydroelectric facilities on the western rivers.
The tribunal also sided with Pakistan on a specific procedural request. It ruled that India may not build the dam wall and power intake structure at the Ratle Hydroelectric Plant beyond certain specified levels until 90 days after a neutral expert, appointed by the World Bank, issues a decision on whether the project’s construction complies with the treaty. That determination is expected by July 2027.
India’s Ministry of External Affairs rejected the ruling outright, stating that the tribunal has no jurisdiction to pronounce on India’s sovereign decisions and that its findings will have no bearing on India’s actions regarding the projects in question. Pakistan, by contrast, welcomed the decision as vindication of its long-standing position.
Understanding the India-Pakistan Water Dispute
Signed in 1960 with the World Bank acting as broker, the treaty divides the six rivers of the Indus basin between the two countries. Pakistan holds rights to the western rivers, namely the Indus, Jhelum, and Chenab, for irrigation, drinking supply, and non-consumptive uses such as hydropower. India controls the eastern rivers, the Ravi, Beas, and Sutlej, for largely unrestricted use, though it is barred from significantly altering their flow.
The arrangement has endured through three wars and numerous periods of heightened tension between the two nuclear-armed neighbours, making it one of the most resilient transboundary water agreements in the world. Pakistan depends on the Indus river system for roughly 80 percent of its water supply, sustaining an agricultural sector that underpins much of the country’s economy. India, meanwhile, currently uses more than 90 percent of the roughly 3.3 crore acre-feet of water it is permitted under the treaty, leaving Pakistan reliant on the remainder for its farms and rural livelihoods.
Implications for the Kashmir Hydroelectric Project
The ruling places direct limits on India’s activity at hydroelectric sites in the disputed Jammu and Kashmir region, where several projects have drawn objections from Islamabad over their potential impact on downstream flow. While the treaty permits India to develop run-of-the-river hydropower facilities that do not meaningfully alter water storage or flow, it also grants Pakistan the right to raise formal objections to project designs it considers non-compliant.
The upcoming assessment by the World Bank-appointed neutral expert is now expected to play a decisive role in determining whether construction at the Ratle facility, and potentially other disputed sites, can proceed as planned. Until that assessment is delivered, India’s construction activity at the site remains constrained by the tribunal’s order.
What Comes Next
India’s rejection of the ruling suggests the dispute is unlikely to be resolved through legal channels alone. New Delhi has signalled it will continue construction activity on its own terms, setting up a potential standoff over enforcement given that the Permanent Court of Arbitration has no direct mechanism to compel compliance. Pakistan is expected to continue pressing its case diplomatically and through the World Bank-appointed expert process, while regional observers will be watching closely to see whether the ruling has any practical effect on ground realities in Kashmir.
For now, the tribunal’s position is unambiguous: the treaty remains binding, and both countries are expected to honour it in full, regardless of the political tensions that prompted India’s attempt to step away from the agreement.
Published in SouthAsianDesk, September 1st, 2026
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