Amateur Radio must organize nationally and internationally for better mutual use of the radio spectrum among radio amateurs throughout the world, to develop Amateur Radio worldwide, and to successfully interact with the agencies responsible for regulating and allocating radio frequencies. National societies throughout the world work together for the international good of Included within the scope of the ITU work are communication services such as the amateur radio and the amateur-satellite services. The Radiocommunication Sector of the ITU (ITU-R) manages the international radio-frequency spectrum and satellite orbit resources. One of the primary activities of the IARU is to work within the ITU structure to preserve and maintain the spectrum allocated to the amateur radio and amateur-satellite services and to promote the usefulness and value of amateur radio. IARU attends all ITU-R meetings that may have any impact on amateur radio. In addition to being a sector member of ITU-R, the IARU also is a sector member of the Development Sector of ITU, or ITU-D. Emergency communications, disaster planning and response are topics discussed in ITU-D and IARU participates in those discussions. The nine individuals who are members of the IARU AC cannot attend all of the numerous ITU meetings that are important to amateur radio. There are quite a number of qualified individuals, termed Expert Consultants and Technical Representatives, who volunteer their time and effort in attending meetings and participate in working groups or study groups on behalf of the IARU.