Inter-American Court of Human Rights (IACtHR)
Addressing the Systemic Risks of Investor-State Dispute Settlement (ISDS) to Climate Action
Informal Note, 5 June 2026
By Daniel Uribe Terán, Lead Programme Officer, Sustainable Development and Climate Change Programme, South Centre
The current international investment agreement (IIA) framework, featuring over 2,200 treaties with Investor-State Dispute Settlement (ISDS) mechanisms, acts as a structural barrier to the implementation of key aspects of the Paris Agreement. By protecting fossil fuel investments, those treaties create significant financial risks that may induce “regulatory chill,” deterring states from implementing necessary climate mitigation measures. Recent rulings from the International Court of Justice, the Inter-American Court of Human Rights, and the European Court of Human Rights have affirmed states’ sovereign rights to regulate for climate action, providing new legal tools to challenge the ISDS status quo. However, these judicial developments do not eliminate litigation risks or guarantee favourable outcomes. Consequently, states must pursue systemic reform, including treaty modernisation, the termination of outdated IIAs, the implementation of comprehensive climate carve-outs, and restrictions on forward-looking damages. Addressing these legal barriers at upcoming forums like the 64th sessions of the United Nations Framework Convention on Climate Change (UNFCCC) Subsidiary Bodies (SB 64) is essential to align international investment law with the existential imperative of a low-emission transition.
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The First Conference on Transitioning Away from Fossil Fuels: Reclaiming Multilateralism for a Just Transition
Informal Note, 28 April 2026
By Daniel Uribe Terán
The First Conference on Transitioning Away from Fossil Fuels, co-hosted by Colombia and the Netherlands, serves as a necessary platform for reclaiming multilateralism for a just transition. This paper analyses how the conference addresses the ‘judicialization’ of climate obligations following landmark 2025 advisory opinions from the International Court of Justice (ICJ), the International Tribunal for the Law of the Sea (ITLOS), and the Inter-American Court of Human Rights (IACtHR). It highlights critical barriers facing developing countries, specifically the ‘regulatory chill’ caused by Investor-State Dispute Settlement (ISDS) mechanisms and the ‘debt-fossil fuel trap’ that binds extractive economies to external risks. It also recognises that integrating the ‘People’s Summit’ outcomes into the official Conference could promote a reparative financial model and strengthen the principle of Free, Prior, and Informed Consent (FPIC). Ultimately, Santa Marta should provide a blueprint for systemic reform, ensuring that global decarbonisation respects resource sovereignty and human dignity while moving toward a coordinated, legally backed effort for collective survival.
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The Role of Advisory Opinions in Shaping International Climate Change Law
By Daniel Uribe Terán
This policy brief analyses how advisory opinions (AOs) from the International Court of Justice (ICJ), the International Tribunal for the Law of the Sea (ITLOS), and the Inter-American Court of Human Rights (IACtHR) are fundamentally reshaping international climate law. These AOs are crystallising States’ climate commitments, transforming them from voluntary political pledges into binding legal obligations grounded in customary international law and human rights. This judicial shift establishes stringent, science-based due diligence standards, confirms State responsibility for harm, and provides a powerful legal foundation for accountability and reparation.
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Corte Interamericana de Derechos Humanos
Solicitud de Opinión Consultiva presentada por la República de Chile y la República de Colombia
Observaciones remitidas por el Centro Sur
Diciembre de 2023
In reference to the invitation extended by the Inter-American Court of Human Rights to submit amicus briefs in the matter of the Request for Advisory Opinion submitted by the Republic of Colombia and the Republic of Chile to the Inter-American Court of Human Rights (IACtHR or the Court) regarding the Climate Emergency and Human Rights. The South Center, an intergovernmental organization of developing countries, respectfully submits to the Inter-American Court of Human Rights the following amicus brief at the request of the Advisory Opinion submitted by the Republic of Chile and the Republic of Colombia.
These observations consider how the definition of shared and differentiated obligations and responsibilities in the legal regime related to climate change is linked to the obligations to cooperate and make reparations arising from the American Convention on Human Rights and the need to consider the right to life and survival of the most affected regions and populations in the various countries and in the region.
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