or repeatedly interrupts a radiocommunication service operating in accordance with the Radio Regulations." The ITU has consistently sought to encourage a rational use of the radio frequency spectrum. Thus, Article 46 of the 1965 Convention states that: Members and Associate Members recognize that it is desirable to limit the number of frequencies and the spectrum space used to the minimum essential to provide in a satisfactory manner the necessary services. To that end it is desirable that the latest technical advances be applied as soon as possible. The 1973 Convention made special provisions for radio. It particularly focused on the rational use of the radio frequency spectrum and connected this subject with the geostationary satellite orbit. Following the lead contained in Article 46 of the 1965 Convention and Article 10.3.b) of the 1973 Convention the parties agreed in Article 33 to the following: 1. Members shall endeavor to limit the number of frequencies and the spectrum space used to the minimum essential to provide in a satisfactory manner the necessary services. To that end they shall endeavor to apply the latest technical advances as soon as possible. 2. In using frequency bands for space radio services Members shall bear in mind that radio frequencies and the geostationary satellite orbit are limited natural resources, that they must be used efficiently and economically so that countries or groups of countries may have equitable access to both in conformity with the provisions of the Radio Regulations according to their needs and the technical facilities at their disposal. Aside from the fact that the 1973 Convention places a somewhat greater duty on ITU members to limit frequencies and spectrum space than in the 1965 Convention, the 1973 addition of paragraph 2 is of substantial importance. This paragraph reflects a direct and greater concern for "limited natural resources" consisting of radio frequencies and the
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