Led by the joint secretariat of the OECD/NEA and IAEA, annual Steering Group meetings, which consist of regulation authorities and electricity utility representatives of membership countries, make decisions on the fundamental policies and direction of the ISOE. Furthermore, to promote the execution of timely actions regarding various ISOE activities, the ISOE Steering Group Bureau Meetings, which comprise, as a minimum, the Chairperson, the Chairperon-Elect, the Vice-Chairperson and Past-Chairperson are held about twice a year a year. The ISOE Technical Centers are generally invited to attend the meetings. Participants execute technical operations through Technical Centers established in Asia, Europe, North America and IAEA.