The document outlines the current status of electricity and gas transmission systems in non-EU countries, focusing on Serbia, Macedonia, Bosnia and Herzegovina, Montenegro, Russia, Switzerland, and Albania. Each country's transmission system operator (TSO) is detailed, noting ownership structures, unbundling status, regulatory frameworks, and outstanding issues such as infrastructure development and legal compliance. Key concerns across these countries include underdeveloped infrastructure, lack of harmonization with EU regulations, and significant operational challenges.