Only national organizations for OI in Europe can become ordinary members of OIFE. Ordinary members appoint a delegate (with substitutes) who has a vote at the Annual General Meeting (AGM).
National OI-organizations outside Europe can become associate members. Associate members appoint a delegate (with substitutes), but they do not have a vote at the Annual General Meeting (AGM).
Any national or international organization related to osteogenesis imperfecta who doesn’t fit into the other categories can become a supporting member. OIFE has two types of supporting members at the moment – research foundations and aid organizations helping individuals in developing countries.