The ITU Radiocommunication Assembly considering a) that the types of radiation which can cause harmful interference can differ widely depending on the particular technical and operational characteristics of the services involved and the aircraft phase of flight (e.g. en route, approach); b) that GPS and GLONASS are constituent elements of the International Civil Aviation Organization’s (ICAO) Global Navigation Satellite System (GNSS); c) that other planned RNSS systems such as Galileo may request to become constituent elements of the International Civil Aviation Organization’s (ICAO) Global Navigation Satellite System (GNSS); d) that the ICAO 10th Air Navigation Conference, in 1991, adopted a future Communications Navigation Surveillance (CNS) system concept largely based on satellite services, of which the GNSS is the key navigation component; e) that standards and recommended practices (SARPs) which provide technical data for the global navigation satellite system (GNSS) operations and associated aircraft avionics equipment have been developed by ICAO; f) that from 1998 onwards the narrow-band mode of GLONASS-M operates in the band 1 597.5515-1 609.8235 MHz. After the year 2005 both the narrow-band and wideband GLONASS-M modes will operate in the band 1 592.9525-1 609.3600 MHz. ICAO is currently considering using only the narrow-band mode for the GNSS; g) that some administrations may be currently using, or may be planning to use the band allocated to RNSS for fixed service operations; h) that such fixed service operations may have the potential to cause harmful interference to GNSS operations in the band.