ECT withdrawal

The Energy Charter Treaty (ECT) is a multilateral agreement signed in 1994 and in force since 1998 that protects cross-border energy investments and provides investor-state dispute settlement (ISDS). Withdrawal is governed by Article 47, under which a party may give written notice to the depositary; the exit takes effect one year later. Critically, Article 47(3) contains a "sunset clause" that keeps the treaty's investment protections applicable to existing investments for 20 years after the withdrawal date.

A wave of European withdrawals began with Italy, which notified its exit in 2015 (effective 1 January 2016) after disputes over solar subsidies. Pressure intensified after the Court of Justice of the EU ruled in Komstroy (C-741/19, 2021) that intra-EU ISDS arbitration under the ECT is incompatible with EU law, echoing its earlier Achmea (2018) reasoning. A negotiated "modernisation" text agreed in June 2022 failed to win sufficient EU support, prompting a cascade of announcements:

• France, Germany, the Netherlands, Spain, Poland, Luxembourg, Slovenia and others announced withdrawal in 2022–2023.
• In May 2024, the Council of the EU formally approved a coordinated withdrawal of the European Union and Euratom from the treaty.
• The United Kingdom announced its own withdrawal in February 2024.

The sunset clause means investors can still bring claims relating to pre-withdrawal investments well into the 2040s, unless withdrawing parties conclude an inter se agreement to neutralise it among themselves — a step the EU has discussed but not finalised at scale.

For MUN and policy researchers, ECT withdrawal sits at the intersection of climate policy (concerns that fossil-fuel investors use ECT arbitration to challenge phase-out measures, as in RWE v. Netherlands and Uniper v. Netherlands), EU legal autonomy, and the broader debate over reforming or abandoning ISDS.