The ITU Radiocommunication Assembly considering: a) that telecommunication links are being used and planned for use on some satellite systems for inter-satellite communications at frequencies within the range of 20-375 THz; b) that the viability of fixed-satellite service telecommunication systems operating in the 20-375 THz range of the spectrum using Earth-to-space and space-to-Earth links is currently being investigated; c) that astronomers are making observations in this part of the spectrum; d) that this part of the spectrum is also being used for other science services; e) that this part of the spectrum is also being used for scientific and industrial purposes other than communication; f) that mechanisms of interference between satellites and passive systems such as astronomy operating above 20 THz may differ from those in the radio frequency part of the spectrum.