The 5th PCI list will be adopted by the European Commission by the end of 2021 under the existing regulation on Trans-European Energy Networks (TEN-E). Future PCI lists will be adopted under the revised TEN-E regulation currently being negotiated.
On 31 October 2019 the Commission published its fourth list of PCIs, which contains 151 projects; 102 electricity transmission and storage, 6 smart grid deployment, 32 gas, 6 oil and 5 cross-border carbon dioxide networks.