1991 European Energy Charter

• signed on 17 December 1991

1994 Energy Charter Treaty

• signed on 17 December 1994 
• ratified on 22 February 1995
• deposited on 12 July 1995
• entered into force on 16 April 1998

1994 Protocol on Energy Efficiency and Related Environmental Aspects

• signed on 17 December 1994 
• ratified on 9 December 2004
• deposited on 27 April 2004
• entered into force on 27 May 2004

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

• ratified on 12 October 2009
• deposited on 23 October 2009
• entered into force on 21 January 2010

2015 International Energy Charter

• signed on 20 May 2015