The ITU Radiocommunication Assembly considering a) that systems in the fixed service (FS) are widely employed throughout the world and make extensive use of much of the radio-frequency spectrum; b) that the mobile-satellite service (MSS) is allocated in a number of bands in the ITU Radio Regulations on a primary basis co-equally shared with the FS; c) that there is potential for interference to systems in the FS from MSS systems using both geostationary and non-geostationary orbits; d) that several World Radiocommunication Conferences addressed a number of allocation issues that affected sharing between the FS and MSS.