The ERGP is composed of 28 NRAs from EU countries. The Commission, the EFTA Surveillance Authority, NRAs from EEA states (Norway, Iceland and Liechtenstein), Switzerland and 4 EU candidate countries (Turkey, the Former Yugoslav Republic of Macedonia, Serbia and Albania) participate as permanent observers to the group. Other ad-hoc observers may also be invited to the meetings of the group (currently NRAs from Moldova, Bosnia and Herzegovina).
