IT is widely believed and legally asserted that India’s suspension of the Indus Waters Treaty (IWT) constitutes a significant breach of international law, as the treaty remains legally binding and enforceable under international obligations. The unilateral action undermines the principle of good faith in treaty implementation and sets a dangerous precedent for multilateral agreements. International courts have affirmed the IWT’s continued validity, emphasizing that India lacks legal justification for its suspension. Moving in tandem with its previous rulings, in August 2026, The Hague-based Permanent Court of Arbitration (PCA), unanimously ruled that the Indus Waters Treaty remains fully in force and that India cannot unilaterally suspend it. India’s actions risk escalating regional tensions and jeopardizing water security in South Asia, particularly for Pakistan, which relies heavily on the Indus River system. Upholding treaties is essential to maintaining global legal order and diplomatic stability.
On August 31, The Hague-based Permanent Court of Arbitration concluded that none of the grounds cited by India justified holding the treaty in abeyance or terminating its obligations. The IWT has been upheld by international courts as still in force, with no legal justification for unilateral termination. The PCA ruled that India cannot unilaterally suspend the treaty or disrupt arbitration, affirming international legal obligations. The PCA’s issued its irrevocable findings: 1-Treaty Status: The five-member tribunal unanimously decided that the 1960 water-sharing agreement remains fully in force. 2- Suspension Rejected: The court stated India has no legal justification to hold the treaty in abeyance or withdraw from its obligations. 3- Project Restrictions: The court ordered interim measures restricting certain construction work on hydropower projects, such as the Rattle project on western rivers.
By refusing to recognize the decision, New Delhi risks undermining global reliance in multilateral dispute mechanisms and may face diplomatic and legal repercussions. This stance by India underscores tensions with Pakistan regarding transboundary water rights and adherence to International law. Notably, the legal status of India’s decision to place the Indus Waters Treaty (IWT) in “abeyance” is a subject of significant international dispute. The Permanent Court of Arbitration (PCA) in The Hague ruled unanimously that the treaty remains fully in force, stating that international law provides no grounds for its unilateral suspension. There are 4 major thoughtful international legal bases that reject India’s stance.
1-Violation of pactasuntservanda (VCLT) article 26 : undeniably, the bedrock of the treaty law is enshrined in article 26 of the Vienna Convention on the Law of Treaties says that every treaty in force is binding and must be performed in good faith. Needless to say, the 1960 Indus Water Treaty which is historically attributed to mutual adherence to international law and global norms that were negotiated by the World Bank. And in this treaty, there is no clause which could allow any unilateral suspension. It’s why The Hague-based Permanent Court of Arbitration (PCA) unanimously found that New Delhi’s move to unilaterally keep the treaty under abeyance was not permissible under the treaty or other applicable rules of international law. By invoking the term, no technical meaning in international law, India has willfully disregarded a peremptory norm, eroding the foundation of its international obligations.
2-A serious breach of the Treaty text and joint modification clause of the IWT’s article XII (4). This article explicitly forecloses unilateral exit, fostering the argument that the Treaty ‘’shall continue in force until terminated by a duly ratified treaty concluded for that purpose between the two Government’’. Thus, the PCA affirmed the treaty fully remains in force. Therefore, India’s this act thus constitutes a material breach under VCLT article 60. And consequently risks normalizing the idea that resource treaties can be disregarded at political will.
3- Disregard of binding dispute settlement: IWT article IX & annexure G. The Indus treaty was designed in a way that it could withstand political crises through institutional mechanism. Pakistan invoked article IX and annexure G, triggering arbitration. The PCA held that it had jurisdiction and that unilateral declarations have no legal effect. It further stated that India’s non-participation and rejection of the tribunal violates VCLT article 27 which says that a state’ ’may not invoke the provisions of its internal law as justifications for its failure to perform a treaty ignoring a binding arbitral process corroding the dispute resolution architecture that underpins trans boundary water law.
4-Defiance of established ICJ jurisprudence: International jurisprudence has consistently rejected unilateral withdrawal from long term resource treaties. Gabcikovo-Nagymaros water project case (Hungary vs Slovakia, the ICJ ruled that the political necessity or fundamental change cannot justify suspension of obligations as India linked the treaty suspension with security concerns. The PCA found that ‘’none of these grounds could justify suspension or termination of the treaty’’. The defiance undermines protection of Pakistan’s civilian populations dependent on the western rivers, Indus, Jhelum and Chenab.
Conclusion: By persisting the treaty in abeyance and dismissing the PCA as illegally constituted, New Delhi rejects both the treaty text and its adjudicated ruling. By doing this, India has eroded the ruled-based international order. This is not mere non-compliance, it is a heinous erosion of an international treaty because it signals that India leverages its political will over a 66-year agreement, despite binding arbitration. Such actions risk escalating regional tensions and threaten trans-boundary water security, especially in a climate-vulnerable region. International law emphasizes the sanctity of treaties and the obligation to refrain from unilateral changes without mutual consent.
—The writer is an independent IR & International Law analyst, based in Karachi.
