India rejects Court of Arbitration’s pondage award on Indus Waters Treaty

The Permanent Court of Arbitration (PCA) at The Hague issued an award on May 15, 2026, concerning maximum pondage limits on western rivers under the Indus Wa...

What Happened

The Permanent Court of Arbitration (PCA) at The Hague issued an award on May 15, 2026, concerning maximum pondage limits on western rivers under the Indus Waters Treaty (IWT), supplemental to its earlier award on general interpretation of the treaty.
India's Ministry of External Affairs categorically rejected the award, declaring it "null and void," reiterating that the Court of Arbitration was "illegally constituted" and that India has never participated in or recognised those proceedings.
India maintained that its decision to hold the Indus Waters Treaty "in abeyance" — announced following the April 22, 2025 Pahalgam terror attack — remains in force until Pakistan credibly and irrevocably abjures support for cross-border terrorism.
The dispute centres on the permissible pondage (temporary water storage) linked to run-of-the-river hydroelectric projects India is building on western rivers, particularly the Kishenganga and Ratle projects.
India's position is that the dispute over these projects is a "difference" to be adjudicated by a Neutral Expert under the treaty, not a "dispute" falling under the Court of Arbitration mechanism.

Static Topic Bridges

The Indus Waters Treaty, 1960

The Indus Waters Treaty was signed on September 19, 1960, between India and Pakistan, with the World Bank as a guarantor and facilitator. It allocates the six rivers of the Indus basin between the two countries: the three eastern rivers (Beas, Ravi, Sutlej) were allocated to India, while the three western rivers (Indus, Jhelum, Chenab) were allocated to Pakistan. India received control of roughly 20% of total water flow; Pakistan received 80%. For western rivers, India is permitted only limited non-consumptive uses, primarily run-of-the-river hydroelectric projects, subject to strict design constraints including limits on pondage and prohibition of storage for flow regulation.

Signed: September 19, 1960, Karachi
Facilitated by: World Bank (not a party but a guarantor)
Eastern rivers (India): Beas, Ravi, Sutlej — total mean annual flow ~33 million acre-feet
Western rivers (Pakistan): Indus, Jhelum, Chenab — total mean annual flow ~135 million acre-feet
Permanent Indus Commission: joint body with one commissioner from each country, meeting at least once a year
The treaty survived three wars (1965, 1971, 1999) and multiple crises — often cited as a model water-sharing agreement

Connection to this news: The current dispute concerns pondage — the temporary storage of water permissible on western rivers for run-of-the-river hydroelectric projects. The PCA issued a supplemental award defining the maximum pondage limits, which India rejects as exceeding the tribunal's mandate and legitimacy.

Dispute Resolution Mechanism Under the IWT (Article IX and Annexures F and G)

The IWT establishes a graded three-tier dispute resolution mechanism under Article IX. First, any question of interpretation or application is examined by the Permanent Indus Commission. Second, if unresolved, a "difference" on technical matters listed in Annexure F is referred to a Neutral Expert appointed by the World Bank. Third, a "dispute" — a broader legal disagreement — is referred to a Court of Arbitration constituted under Annexure G, comprising seven arbitrators. India's core objection is that Pakistan simultaneously initiated both Neutral Expert proceedings and Court of Arbitration proceedings on the same Kishenganga and Ratle projects — which India argues is impermissible under the treaty's sequential dispute resolution design.

Tier 1: Permanent Indus Commission (meetings, information exchange)
Tier 2: Neutral Expert (technical questions under Annexure F) — binding on technical determinations
Tier 3: Court of Arbitration (seven-member tribunal under Annexure G) — binding on legal disputes
India's position: the Kishenganga and Ratle issues are "differences" for the Neutral Expert, not "disputes" for the CoA; hence the CoA was illegally constituted for these cases
Past application of Neutral Expert: Baglihar Dam (2007) — Pakistan's objections rejected
Past application of CoA: Kishenganga project — tribunal ruled in India's favour on diversion rights

Connection to this news: India refuses to participate in or recognize the CoA proceedings because it considers the tribunal to have been constituted in violation of the treaty. The pondage award is the latest in a series of awards from a tribunal India regards as having no legitimate jurisdiction.

Treaty Abeyance and International Water Law

India placed the IWT in abeyance in May 2025 following the Pahalgam terror attack, arguing that the treaty's operation requires an atmosphere of trust and that Pakistan's support for cross-border terrorism fundamentally alters the treaty's foundational conditions. While there is no explicit suspension clause in the IWT, India invokes the principle of material breach under the Vienna Convention on the Law of Treaties (VCLT), 1969, particularly Article 60, which permits suspension of a treaty in response to a material breach by the other party. Pakistan contests this, and the PCA itself ruled in January 2023 that it has jurisdiction and that India cannot unilaterally suspend the treaty.

Vienna Convention on the Law of Treaties (VCLT), 1969 — Article 60: material breach as ground for suspension
Article 62 VCLT: fundamental change of circumstances (rebus sic stantibus) — another legal basis India can invoke
The IWT has no explicit withdrawal or suspension clause — India's abeyance is a contested legal position
India formally notified Pakistan of placing the treaty in abeyance in May 2025

Connection to this news: With the treaty formally in abeyance, India's rejection of the pondage award is consistent — it declines to engage with any treaty mechanism while asserting Pakistan has not met the preconditions for restoration.

Key Facts & Data

IWT signed: September 19, 1960 (Karachi)
Facilitated by: World Bank
Rivers allocated to India: Beas, Ravi, Sutlej (eastern)
Rivers allocated to Pakistan: Indus, Jhelum, Chenab (western)
India's share: ~20% of total flow; Pakistan's share: ~80%
Dispute resolution tiers: 3 (Indus Commission → Neutral Expert → Court of Arbitration)
Pondage limit formula: 0.0432 × Mean Maximum Discharge (MMD)
Neutral Expert — Baglihar Dam case: 2007, Pakistan's objections rejected
India notified treaty abeyance: May 2025 (following Pahalgam attack, April 22, 2025)
PCA's January 2023 ruling: it has jurisdiction; India cannot unilaterally suspend treaty
Pondage supplemental award date: May 15, 2026