1991 European Energy Charter
1994 Energy Charter Treaty (ECT) and Protocol on Energy Efficiency and Related Environmental Aspects (PEEREA)
1998 Amendment to the Trade related provisions of the Energy Charter Treaty
2015 International Energy Charter
Enquiry Point (Article 20.3 of the Energy Charter Treaty). Last updated on 20/03/2001.
Public legal databases
http://www.pisrs.si/Pis.web/ (in Slovenian)