1991 European Energy Charter

• signed on 17 December 1991

1994 Energy Charter Treaty

• signed on 17 December 1994 
• ratified on 21 May 2001
• deposited on 30 May 2001
• entered into force on 28 August 2001

1994 Protocol on Energy Efficiency and Related Environmental Aspects

• signed on 17 December 1994 
• ratified on 21 May 2001
• deposited on 30 May 2001
• entered into force on 28 August 2001

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

• ratified on 13 July 2001
• deposited on 30 May 2001
• entered into force on 21 January 2010

2015 International Energy Charter

• signed on 20 May 2015