The Energy Charter Treaty (ECT), signed in 1994 and in force since 1998, gives energy investors broad rights to sue host states through investor-state dispute settlement (ISDS). As climate policy tightened in the 2010s, contracting parties faced a growing number of arbitration claims from fossil fuel investors challenging coal phase-outs, nuclear exits, and renewables subsidy cuts. High-profile cases such as Vattenfall v. Germany and RWE/Uniper v. Netherlands intensified pressure to reform the treaty.
The Energy Charter Conference launched a formal modernization process in late 2018, with negotiating rounds beginning in 2019. The reform package agreed in principle in June 2022 included:
- A flexibility mechanism allowing parties to carve out fossil fuel investments from ECT protection on their territory, with phase-out timelines.
- Tighter definitions of fair and equitable treatment and indirect expropriation, intended to limit expansive arbitral interpretations.
- Explicit recognition of states' right to regulate for climate, environmental, and public-health objectives.
- Coverage of newer energy carriers such as hydrogen and biomass.
Adoption stalled because several EU member states, including France, Spain, the Netherlands, Germany, and Poland, announced intentions to withdraw from the ECT in 2022–2023, citing incompatibility with the Paris Agreement and the European Green Deal. The European Parliament backed coordinated EU withdrawal in November 2022. In July 2023 the European Commission proposed a coordinated withdrawal by the EU, Euratom, and member states, which the Council endorsed in 2024.
A key obstacle is the ECT's sunset clause (Article 47), which extends investor protections for 20 years after withdrawal. Withdrawing parties have explored an inter se agreement to neutralize the sunset clause between themselves, building on the EU's response to Achmea and Komstroy. The modernized text was ultimately adopted by the Energy Charter Conference, but its practical reach is sharply reduced by the wave of EU departures.
Example
In July 2023 the European Commission proposed a coordinated withdrawal of the EU and its member states from the Energy Charter Treaty, arguing that even the modernized ECT was inconsistent with the European Green Deal.
Frequently asked questions
They concluded that even the reformed treaty would continue to expose climate policies to ISDS claims and that fossil fuel carve-outs were too slow and optional to align with the Paris Agreement.
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