The Energy Charter Treaty (ECT) was signed in Lisbon in December 1994 and entered into force in April 1998. It grew out of the 1991 European Energy Charter, a political declaration designed to integrate the post-Soviet energy sector with Western European markets after the Cold War. The ECT is administered by the Energy Charter Secretariat, based in Brussels.
The treaty covers four main areas:
- Investment protection for foreign investors in the energy sector, including guarantees against expropriation and discriminatory treatment.
- Trade in energy materials and products, originally referencing GATT/WTO rules.
- Transit of energy across member territories, particularly relevant for oil and gas pipelines.
- Dispute settlement, including state-to-state arbitration and, under Article 26, investor-state dispute settlement (ISDS) allowing private companies to sue host states before international tribunals.
The ECT has roughly fifty contracting parties, mostly European and Central Asian states, plus the European Union and Euratom. Russia signed but never ratified the treaty and withdrew provisional application in 2009 following the Yukos arbitration, in which a tribunal in 2014 ordered Russia to pay around USD 50 billion to former Yukos shareholders (later annulled and reinstated in Dutch courts).
In recent years the ECT has become controversial because fossil-fuel companies have used Article 26 to challenge climate policies. Cases include Vattenfall v. Germany over the nuclear phase-out and RWE and Uniper v. Netherlands over coal phase-out laws. After modernization talks concluded in 2022 failed to satisfy climate concerns, Italy (which had already withdrawn in 2016), France, Germany, Poland, Spain, Luxembourg, the Netherlands, Slovenia, Portugal, Ireland, and the United Kingdom announced withdrawals. In 2024 the European Union and Euratom formally decided to withdraw collectively, citing incompatibility with the European Green Deal and the Paris Agreement.
A twenty-year sunset clause (Article 47) continues to protect existing investments after withdrawal.
Example
In 2021, German energy companies RWE and Uniper invoked the Energy Charter Treaty to sue the Netherlands over its 2030 coal phase-out legislation, seeking over €1.4 billion in compensation.
Frequently asked questions
Member states argue that the treaty's investor-state arbitration provisions allow fossil-fuel firms to challenge climate policies, undermining commitments under the Paris Agreement and the European Green Deal.
Keep learning