1991 European Energy Charter

• signed on 9 December 2005

 1994 Energy Charter Treaty

• approved for accession by the Energy Charter Conference on 20 November 2006 (CCDEC200603)

1994 Protocol on Energy Efficiency and Related Environmental Aspects

• approved for accession by the Energy Charter Conference on 20 November 2006 (CCDEC200603)

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

• approved for accession by the Energy Charter Conference on 20 November 2006 (CCDEC200603)

 2015 International Energy Charter

• signed on 21 May 2015