commendations were adopted, television) and mobile systems, where eight new Recommendations were X/XI - 3 Sound and television recording adopted and twelve revised. Many of the mobile Recommendations deal with frequency sharing and interference issues. XI - 1 Broadcasting service (television) Television and sound transmission (CMITT) Table 22.4 CCIR Study Groups Vocabulary (CCV) Administrative texts of the CCIR Study Group Activity XV - 1 Questions concerning Study Groups 1, 5, 6, 7 and 12 Spectrum engineering XV - 2 Questions concerning Study Group 8 Space research and radioastronomy XV - 3 Questions concerning Study Groups 10, 11 and Fixed service at frequencies below about 30MHz XV - 4 Questions concerning Study Groups 4 and 9 Fixed satellite service Radio wave propagation in non-ionised media Radio wave propagation in ionised media Following the 1990 Plenary Assembly a Working Party was set up Science services to examine the structure of the Study Groups and to recommend Mobile changes to the next Plenary Assembly, in order to improve the efficiency and effectiveness of CCIR work. Fixed service The Director of the CCIR is assisted by a specialised Secretariat Broadcasting service (sound) with four departments. Department A deals with broadcasting media Broadcasting service (television) (sound, television, satellite), broadcast programme transmission, and computer applications. It is responsible for Study Groups 10, Inter-service sharing and compatibility 11, CMMT and liaison with the IEC. Department B is responsible International standards organisations 22/13 for spectrum utilisation and monitoring, space research and radio Council administers the ISO between General Assemblies, astronomy, radiowave propagation, Study Groups 1, 2, 5, 6, and meeting once a year to receive reports from the various com- liaison with CISPR and URSI. mittees set up to do studies in designated areas. The Council is Department C is responsible for fixed satellite service; fixed also responsible for preparing and managing the budget 