THE HAGUE: The Permanent Court of Arbitration (PCA) has ruled that the Indus Waters Treaty (IWT) between India and Pakistan remains in force, saying India cannot unilaterally suspend or terminate the decades-old water-sharing agreement.
The ruling is significant because the Indus Waters Treaty governs the distribution and use of water from the Indus river system, which is essential to Pakistan’s agriculture, energy production and wider economy. The treaty, signed in 1960 with the World Bank as a guarantor, has survived repeated periods of tension and conflict between the two neighbouring countries.
Court says treaty remains binding
The arbitration process has focused on disagreements over Indian hydroelectric projects on rivers covered by the treaty. The PCA has previously ruled on the interpretation of treaty provisions and the limits placed on India’s projects on the western rivers.
The court’s latest position reinforces the principle that the agreement cannot simply be put aside through unilateral action. According to the ruling reported on August 31, 2026, India had no valid grounds to suspend or end the treaty on its own.
The development comes after India announced that it would hold the treaty in abeyance amid heightened tensions with Pakistan. The arbitration court rejected the idea that such a unilateral move could remove the treaty’s legal obligations.
Why the Indus Waters Treaty matters
The treaty divides the six major rivers of the Indus system between the two countries. The eastern rivers — Ravi, Beas and Sutlej — are primarily allocated to India, while Pakistan has rights over the western rivers — Indus, Jhelum and Chenab — subject to specific provisions allowing India certain uses, including hydropower generation.
For Pakistan, the western rivers are particularly important because millions of farmers and communities depend on their waters. Any major disruption to river flows could have consequences for agriculture, food security and electricity generation.
The agreement has therefore been regarded as one of the most important examples of long-term water cooperation between two countries that have otherwise experienced decades of political and military tensions.
Dispute over hydroelectric projects
A major part of the legal dispute concerns Indian hydroelectric projects on the western rivers, including projects such as Ratle and Kishenganga.
Pakistan has argued that certain design features and water-storage capabilities of Indian projects could affect downstream flows. India, meanwhile, has maintained that its projects are permitted under the treaty and has challenged the authority and proceedings of the arbitration mechanism in the case.
The PCA has nevertheless continued its proceedings and has issued several decisions concerning the treaty’s interpretation and the technical limitations on hydroelectric projects. Its official case record lists awards covering the court’s competence, treaty interpretation and maximum pondage.
Neutral expert to assess hydroelectric projects
The latest development also includes a role for a neutral expert appointed through the World Bank. The expert is expected to assess by July 2027 whether construction of the relevant hydroelectric facilities in the Himalayan region complies with the treaty’s requirements.
This mechanism could become important as India continues developing hydropower infrastructure in the region while Pakistan seeks assurances that the projects will not interfere with its treaty-protected water rights.
Pakistan welcomes the development
Pakistan has consistently welcomed the arbitration proceedings and argued that the Indus Waters Treaty remains legally binding.
Islamabad has also pointed to earlier PCA decisions that affirmed restrictions on India’s ability to control or store water on the western rivers. Pakistan’s Foreign Office has said that the treaty’s dispute-resolution mechanisms remain an important way to address disagreements without allowing political tensions to undermine the agreement.
India’s position
India has previously rejected the arbitration proceedings and questioned the court’s authority to adjudicate the disputes. Indian officials have maintained that the country reserves the right to take measures to protect its national interests amid security and diplomatic tensions.
The latest ruling could therefore add another layer to the already complicated relationship between New Delhi and Islamabad.
What the ruling could mean
The decision is likely to keep the Indus Waters Treaty at the centre of India-Pakistan relations. While the ruling does not resolve every disagreement surrounding hydroelectric projects, it reinforces the legal framework through which future water disputes can be addressed.
For Pakistan, the continuation of the treaty provides reassurance that its rights over the western rivers remain protected. For India, the ruling could create further pressure to address disagreements through the treaty’s established mechanisms rather than unilateral suspension.
The wider significance extends beyond the two countries. The Indus Basin is one of the world’s major shared river systems, and stable management of its water resources is crucial for millions of people.
A treaty tested by decades of tensions
The Indus Waters Treaty has survived wars, diplomatic crises and repeated periods of hostility since it was signed more than six decades ago. The latest arbitration decision once again demonstrates how closely water security is linked to relations between India and Pakistan.
The challenge ahead will be ensuring that legal decisions, technical assessments and diplomatic negotiations can work together to prevent water disputes from becoming a new source of instability in South Asia.
For Pakistan, the issue is not simply about a treaty or a legal dispute. Water from the Indus system is directly connected to agriculture, food production, livelihoods and the country’s long-term economic security. The continued implementation of the treaty therefore remains a major national priority.