23.6 - 24 GHz had been allocated to the radio astronomy service on a primary basis. The Conference recommended that space stations be designed in such a manner as to reduce the radiation level of the second harmonic so that observations by radio astronomers would not be seriously disturbed. Recommendation HH recommended that the forthcoming Region 2 Conference "draw up a detailed plan for the orbit/spectrum resource available for the broadcasting-satellite services in the 11.7 - 12.2 GHz band." The recommendation is notable for its specificity: The plan shall provide for the detailed assignment of the orbital positions and frequency channels available, ensuring that the broadcasting-satellite service requirements submitted by the various administrations are met in an equitable manner satisfactory to all the countries concerned. It should be laid down as a matter of principle that each administration in the Region should be guaranteed a minimum number of channels (4) for the operation of the broadcasting-satellite service. Above this minimum, the special characteristics of the countries (size, time zones, language differences, etc.) shall be taken into account. 2.10 Assessment of Role of ITU in SPS Activities Several broad conclusions can be derived from what has been written above. The ITU, despite some assessments that would constrict it to fairly narrow influences and powers, has staked out for itself a wide- ranging function regarding what has come to be identified as the "geostationary orbit spectrum resource." The ITU's involvement stems from Article 33 of the 1973 Convention, and in particular, relies on the provision that "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
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