1991 European Energy Charter

• signed on 5 February 1993

1994 Energy Charter Treaty

• signed on 17 December 1994 
• ratified on 31 October 1997
• deposited on 9 December 1997
• entered into force on 16 April 1998

1994 Protocol on Energy Efficiency and Related Environmental Aspects

• signed on 17 December 1994 
• ratified on 10 August 1998
• deposited on 15 September 1998
• entered into force on 15 October 1998

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

• ratified on 2 April 2003
• deposited on 5 August 2005
• entered into force on 21 January 2010

2015 International Energy Charter

• signed on 20 May 2015