The Indus Waters Treaty: A Flashpoint for South Asia’s Future

The Indian government’s rejection of a Hague-based Court of Arbitration ruling has cast doubt on the future of the 1960 Indus Waters Treaty, a decades-old agreement governing the use of water from six rivers flowing through India and Pakistan. While some view this move as an assertion of sovereignty, others see it as an attempt to undermine an international treaty designed to prevent conflict between two nuclear-armed nations.

At its core, the dispute revolves around the allocation of waters from the western rivers - the Indus, Jhelum, and Chenab - which are critical for Pakistan’s food supply and rural economy. The treaty has been a cornerstone of regional stability since 1960, enduring wars and prolonged periods of intense hostility between India and Pakistan.

In April 2025, India placed the treaty in abeyance as part of a package of diplomatic and economic measures following a deadly attack on Indian-administered Kashmir that killed 26 people. The move was seen as an attempt to exert pressure on Pakistan, which has repeatedly warned that any denial of its share of the waters would be treated as an act of war.

Pakistan’s Deputy Prime Minister and Foreign Minister Ishaq Dar responded swiftly, calling India’s actions a “clear rejection” of the treaty. He emphasized that the treaty remains in force and binding on both parties, with Pakistan entitled to its share of the waters as per international law.

The implications of this development are far-reaching, not just for the two nations but also for regional stability and global diplomacy. For one, India’s rejection of the ruling has cast a shadow over its international position, particularly given that it has accepted international legal decisions in other disputes.

The Rise of Lawfare

Indian scholar Uttam Kumar Sinha notes that this emerging contest is no longer merely about interpreting the treaty but challenging the authority of the treaty’s dispute-settlement mechanism itself. Pakistan is likely to use the ruling in international forums and frame the dispute around treaty obligations and international law, a tactic known as “lawfare.” This strategic deployment of international law has become a hallmark of regional politics in South Asia.

The stakes are high, with millions of people dependent on these rivers for drinking water, farming, and daily life. Pakistan’s Deputy Prime Minister Ishaq Dar emphasized that the treaty remains binding on both parties, with Pakistan entitled to its share of the waters as per international law.

A Watershed Moment?

Some analysts argue that India has long contended that the treaty needs to be renegotiated, citing climate change, new dam-building technology, and deteriorating relations between the two countries. However, others believe that the ruling itself is unlikely to have significant practical implications for either country.

Shanthie Mariet D’Souza notes that the Permanent Court of Arbitration is an administrative body without enforcement capabilities. In this case, India chose not to participate in the proceedings, allowing it to sidestep the tribunal’s rulings.

The Limits of Leverage

Despite these reservations, Pakistan has reason to be optimistic. Ayesha Siddiqa notes that the arbitration court’s ruling may not be implementable because the court lacks the force to do so. However, she adds that this decision gives Pakistan a moral edge in its long-standing dispute with India.

Moreover, as a lower riparian state, Pakistan has historically been at a disadvantage in negotiations over water rights. The treaty itself reflects an asymmetry of power between the two countries, with India granted greater control over three eastern rivers while Pakistan’s share is largely restricted to the western Indus.

A New Era for South Asia?

The rejection by India of the Hague ruling marks a new era for regional politics in South Asia. It raises fundamental questions about the role of international law and dispute-settlement mechanisms in preventing conflict between two nuclear-armed nations.

As tensions escalate, Pakistan may use the ruling to press its claims in international forums, while India continues to resist international pressure. The outcome will have far-reaching implications not just for the two nations but also for regional stability and global diplomacy.