1991 European Energy Charter

• signed on 17 December 1991

1994 Energy Charter Treaty

• signed on 17 December 1994
• ratified on 13 December 1996
• deposited on 16 December 1997
• entered into force on 16 April 1998
• notification of withdrawal on 26 April 2024 (effective on 27 April 2025)

1994 Protocol on Energy Efficiency and Related Environmental Aspects

• signed on 17 December 1994
• ratified on 13 December 1996
• deposited on 16 December 1997
• entered into force on 16 April 1998
• notification of withdrawal on 26 April 2024 (effective on 27 April 2025)

1998 Amendment to the Trade related provisions of the Energy Charter Treaty

• ratified on 13 July 2001
• deposited on 21 December 2001
• entered into force on 21 January 2010 as part of the European Union
• notice of ratification as UK deposited on 30 December 2020
• since 1 January 2021 provisional application until entry into force (ninetieth day after deposit of instrument of ratification)

2015 International Energy Charter

• signed on 20 May 2015