As the first step, it requires political agreement between all parties involved (including Russia and Belarus). Latvia and Estonia have doubts about the possibility of synchronisation through only one existing line to Poland due to safety issues (Baltic course, 2017). According to Poland, building a second LitPol Link would be complicated dueto environmental requirements (Energy central, 2017). In addition, a single line could mean significantly higher costs forthe operation of the energy systems in the Baltic countries and a decline in the security of supplies (Financial observer, 2017).