Frequency Band Allocation: The entry in the National Table of Frequency Allocations of frequency bands for the purpose of their use in one or more space or terrestrial radio communications services or radio astronomy services under stipulated conditions. Assignment: The authorization given by the Commission for a Radio Station to use Radio Frequencies or a specific radio channel under conditions set by the Commission for this purpose. National Register of Frequency Assignments The special register containing all the information related to the channels and frequencies which are assigned to civilian Radio Stations and others. Radio Station: One or more transmitters or receivers or a combination thereof, including the supplemental equipment existing at a specific location, for the purpose of providing a radio communications, radio astronomy, or broadcasting service. Radio Frequencies / Radio Frequency Spectrum: Frequencies or spectrum of naturally propagated electromagnetic spectrum waves in the range of 3 (kilohertz) to 3,000 (gigahertz) which are utilized for the emission and reception of Telecommunications signals. Radio Communication: The transmission by radio of writings, signs, signals, images, or sounds of all kinds, including all instrumentalities, facilities, apparatuses, and transmission associated services such as the transmission, reception, or conveyance of communications. Broadcasting Emission: The emission of Radio Communications to be received by the public, directly or through the intermediary of satellite or terrestrial relay stations. Directory: Information related to subscribers to Public Telecommunications Networks services. Universality of Service: The provision of a minimum set of telecommunications and information technology services in areas and communities, and the facilitation of the provision and use of such services in accordance with the terms and conditions specified and modified as needed by the Commission.