Overview:
Vanuatu’s landmark legal victory at the International Court of Justice established that countries have binding obligations to protect the global climate. But in this opinion piece, Kanni Wignaraja and Munkhtuya Altangerel argue that the real test begins now: turning that legal mandate into climate finance that reaches vulnerable Pacific communities through mechanisms such as the Pacific Resilience Facility.
By Kanni Wignaraja and Munkhtuya Altangerel
One year ago, the International Court of Justice (ICJ) ruled, unanimously, that states have binding legal obligations to protect global climate systems. It found that a state’s failure to act, including through fossil fuel production, consumption, new exploration licences, or continued subsidies, may constitute an internationally wrongful act attributable to that state.
It was the outcome of a campaign Vanuatu led from the front, starting with a group of law students at the University of the South Pacific and ending in a unanimous opinion from 15 judges at The Hague.
In May 2026, the UN General Assembly went further, adopting a resolution led by Vanuatu that gave the Court’s legal opinion political weight. By any measure, this is one of the most significant diplomatic wins the Pacific has ever delivered for itself and for the world.
However, this global win does not rebuild or restore a damaged water system. The political go-ahead does not bring electricity to an isolated island community or help farmers recover crops lost to saltwater intrusion. The legal opinion does not reinforce coastlines against the next storm or support communities facing repeated landslides and floods.
An advisory opinion, however unanimous, even with endorsement by the General Assembly, is a statement of intent of what the law requires. It is not the finance, the engineering nor the logistics needed to act on that law. This is what is needed to move an international commitment into practical applications that change lives.
Vanuatu and the wider Pacific have carried the hard part of winning this fight in court: proving the moral case for decades and now proving the legal case as well. What remains unproven is whether the states most responsible for the current climate crisis will treat a confirmed legal obligation any differently than before.
The Pacific-hosted pre-COP this October will be an important opportunity to explore how legal clarity can translate into practical action and finance. The Pacific Resilience Facility (PRF) is a test case readily available. It is a Pacific-designed, Pacific-led financing mechanism built to directly move climate finance to the communities that need it, on terms that make sense for small island economies.
The PRF is designed to respond to a long-standing challenge: many Pacific Island Countries are classified as middle-income countries (MICs) and, therefore, struggle to access the concessional finance available to poorer countries, despite facing some of the world’s greatest climate risks. Faced by this MIC conundrum, the Facility is built around vulnerability measures and not only income levels.
The legal architecture the ICJ has confirmed says that finance, technology, and cooperation are not generous ‘extras’, but are legal obligations. The PRF is where those obligations are tested in practice: pledges made at the pre-COP will demonstrate, in concrete terms, whether the response to the ICJ opinion will be converted to meaningful action or remain aspirational.
There is a version of the next 12 months’ narrative where the Advisory Opinion becomes a genuine turning point: cited in negotiating rooms, referenced in finance decisions, used by Pacific states and their allies to hold large emitters to standards no longer disputable. There is another version where it becomes what too many previous diplomatic wins have become, a landmark statement that changes the conversation without changing how finance flows.
This is also where the Pacific countries’ energy transitions come into play. The Court was clear that continued fossil fuel dependence, including through exploration licenses and sustained subsidies, sits within the range of state conduct that the legal opinion addresses. For the Pacific, that finding strengthens the legal and financial case for the region’s own shift to locally generated renewable energy. And this is precisely the kind of transition the PRF and the climate negotiations are designed to drive. The obligation the Court confirmed is not only about what major emitters must stop doing. It is also about what they must now finance others to do as well.
Vanuatu did not ask the international community for sympathy. It asked the world’s highest court for a ruling, and it got one that leaves very little room for ambiguity. The Pacific has done its part. The Pre-COP in Fiji and Tuvalu, and COP31 in Türkiye, are where we must move from legal clarity to directing climate finance to follow.
