In April 2013, the EU decided to codify "Projects of Common Interest" for cross-border energy projects, Major infrastructure facilities that connect energy networks across the union boost the use of
renewables and ensure that clean, secure and affordable energy can reach all its citizens. In June 2014 the EC introduced the term "Important Project of Common European Interest" (IPCEI) in the context of financial aid for the Projects of Common Interest. IPCEI has since been used synonymously with PCI. In 2018, the EU announced funding the IPCEI for innovation in microelectronics and
communication technologies with €1.75 billion, which was complemented in 2020 by the
European Chips Act. In 2020, the EU overhauled their regulation regarding trans European energy infrastructure (TEN-E policy), as part of the
Trans-European Networks in light of the
European Green Deal. It reworked criteria IPCEII, for example introducing intelligent gas networks, hydrogen and
electrolysis of water projects. ==Eligibility process==