1991 European Energy Charter

• signed on 17 December 1991

1994 Energy Charter Treaty

• signed on 17 December 1994 
• provisional application (suspended on 24 June 2022)

1994 Protocol on Energy Efficiency and Related Environmental Aspects

• signed on 17 December 1994

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

• provisional application (suspended on 24 June 2022)

2015 International Energy Charter

• signed on 20 May 2015