1991 European Energy Charter

• signed on 17 December 1991

1994 Energy Charter Treaty

• signed on 17 December 1994
• ratified on 6 February 1998
• deposited on 29 October 1998
• entered into force on 27 January 1999

1994 Protocol on Energy Efficiency and Related Environmental Aspects

• signed on 17 December 1994
• ratified on 6 February 1998
• deposited on 29 October 1998
• entered into force on 27 January 1999

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

• ratified on 18 February 2009
• deposited on 7 July 2009
• entered into force 21 January 2010

2015 International Energy Charter

• signed on 20 May 2015