1991 European Energy Charter

• signed on 19 December 1991

1994 Energy Charter Treaty

• signed on 17 December 1994 
• ratified on 2 December 1997
• deposited on 17 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 2 December 1997
• deposited on 17 December 1997
• entered into force on 16 April 1998

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

• provisional application

2015 International Energy Charter

• signed on 15 March 2018