What Is the Future of Energy Charter Treaty (ECT)?
The Energy Charter Treaty (ECT) is a multi-nation investment treaty which protects investors from the nationalization of assets and other arbitrary and discriminatory state conduct made at the expense of investments in the energy sector. Most importantly, it provides a means for investors to make claims against member states for breaches of their obligations through international arbitration. Until recent withdrawals, members included Japan, the EU and the European states, the UK, and the former Soviet states.
The ECT is perhaps best known in the context of the many (50+) arbitration claims made against Spain in recent years, including by Japanese investors. These claims came about due to Spanish legislation that was detrimental to renewable infrastructure investments. Essentially, the Spanish government reduced the tariffs paid to renewable projects for the electricity they produced, rendering many projects untenable. This example suggests that the ECT could be an important protection for investors in the coming years as huge investment is made into the energy and renewables sectors. With the ECT in place, investors will take comfort in knowing that governments cannot arbitrarily change the playing field.
However, despite the obvious benefits in supporting and therefore encouraging investment, many commentators see the treaty as having a chilling effect on regulation and as an obstacle to climate-friendly policymaking. They argue that the ECT restricts legislators tackling climate change. As a result, many European countries, frustrated at efforts to negotiate and update the treaty, have recently withdrawn, or indicated they intend to withdraw. This includes, most recently, the UK.
Sunset provisions in the treaty mean these withdrawals will not be effective for another 20 years. But the future of the treaty remains troubled and its relevance is diminishing. There is every chance the ECT will not exist in 20 years.
This article is available in the Jenner & Block Japan Newsletter. / この記事はJenner & Blockニュースレターに掲載されています。
Related Attorneys
Related Articles
Related Capabilities
© 2026 Jenner & Block LLP. Attorney Advertising. Jenner & Block LLP is an Illinois Limited Liability Partnership including professional corporations. This publication, presentation, or event is not intended to provide legal advice but to provide information on legal matters and/or firm news of interest to our clients and colleagues. Readers or attendees should seek specific legal advice before taking any action with respect to matters mentioned in this publication or at this event. The attorney responsible for this communication is Brent E. Kidwell, Jenner & Block LLP, 353 N. Clark Street, Chicago, IL 60654-3456. Prior results do not guarantee a similar outcome. Jenner & Block London LLP, an affiliate of Jenner & Block LLP, is a limited liability partnership established under the laws of the State of Delaware, USA and is authorised and regulated by the Solicitors Regulation Authority with SRA number 615729. Information regarding the data we collect and the rights you have over your data can be found in our Privacy Notice. For further inquiries, please contact dataprotection@jenner.com.
The Energy Charter Treaty (ECT) is a multi-nation investment treaty which protects investors from the nationalization of assets and other arbitrary and discriminatory state conduct made at the expense of investments in the energy sector. Most importantly, it provides a means for investors to make claims against member states for breaches of their obligations through international arbitration. Until recent withdrawals, members included Japan, the EU and the European states, the UK, and the former Soviet states.
The ECT is perhaps best known in the context of the many (50+) arbitration claims made against Spain in recent years, including by Japanese investors. These claims came about due to Spanish legislation that was detrimental to renewable infrastructure investments. Essentially, the Spanish government reduced the tariffs paid to renewable projects for the electricity they produced, rendering many projects untenable. This example suggests that the ECT could be an important protection for investors in the coming years as huge investment is made into the energy and renewables sectors. With the ECT in place, investors will take comfort in knowing that governments cannot arbitrarily change the playing field.
However, despite the obvious benefits in supporting and therefore encouraging investment, many commentators see the treaty as having a chilling effect on regulation and as an obstacle to climate-friendly policymaking. They argue that the ECT restricts legislators tackling climate change. As a result, many European countries, frustrated at efforts to negotiate and update the treaty, have recently withdrawn, or indicated they intend to withdraw. This includes, most recently, the UK.
Sunset provisions in the treaty mean these withdrawals will not be effective for another 20 years. But the future of the treaty remains troubled and its relevance is diminishing. There is every chance the ECT will not exist in 20 years.
This article is available in the Jenner & Block Japan Newsletter. / この記事はJenner & Blockニュースレターに掲載されています。
Related Attorneys
Related Articles
Related Capabilities
© 2026 Jenner & Block LLP. Attorney Advertising. Jenner & Block LLP is an Illinois Limited Liability Partnership including professional corporations. This publication, presentation, or event is not intended to provide legal advice but to provide information on legal matters and/or firm news of interest to our clients and colleagues. Readers or attendees should seek specific legal advice before taking any action with respect to matters mentioned in this publication or at this event. The attorney responsible for this communication is Brent E. Kidwell, Jenner & Block LLP, 353 N. Clark Street, Chicago, IL 60654-3456. Prior results do not guarantee a similar outcome. Jenner & Block London LLP, an affiliate of Jenner & Block LLP, is a limited liability partnership established under the laws of the State of Delaware, USA and is authorised and regulated by the Solicitors Regulation Authority with SRA number 615729. Information regarding the data we collect and the rights you have over your data can be found in our Privacy Notice. For further inquiries, please contact dataprotection@jenner.com.
News and Insights
Podcasts
Partner Laurel Loomis Rimon Discusses Fintech Enforcement, Debanking, and Regulatory Risk on Fintech Layer Cake Podcast
Partner Laurel Loomis Rimon was featured on the Fintech Layer Cake podcast, where she discussed how fintech enforcement and prosecution actually work in practice, and what exposes fintechs and banks to regulatory risk.
July 15, 2026
Publications
Supreme Court Clarifies Scope of Private Rights of Action Under the Investment Company Act, Private Equity Law Report
Partners Charles Riely, Todd C. Toral, and Martin Glass authored a guest article for Private Equity Law Report examining the US Supreme Court's June 11, 2026, ruling on the scope of private rights of action under the Investment Company Act of 1940.
July 14, 2026
Publications
Emily Loeb Discusses Congressional Oversight Preparedness in Bloomberg Law
Partner Emily Loeb, co-chair of Jenner & Block's Congressional Investigations Practice, spoke with Bloomberg Law article about how companies can prepare for potential oversight exposure ahead of this fall's midterm elections.
July 7, 2026
Publications
In New York Law Journal, The True Lender Doctrine and the OppFi Decision
Partners Jeremy Creelan, Michael Ross, Megan Poetzel, and Laurel Loomis Rimon, and Associate Molly Oberstein-Allen authored an article for the New York Law Journal examining the "True Lender" doctrine in light of a May 2026 California decision that provides the most detailed judicial framework to date for evaluating bank-nonbank lending partnerships.
July 1, 2026
Event
Partner Michael Vernick to Speak at NACUA's 2026 Annual Conference
On July 1, Partner Michael Vernick will speak on a panel at the National Association of College and University Attorneys (NACUA) 2026 Annual Conference in Nashville.
July 1, 2026