Page Content 20
Coordination is bilateral/multilateral process, aimed at interference-free operation of existing and planned systems of administrations. From a regulatory point of view there are two types of coordination between administrations: mandatory and voluntary. Mandatory coordination covers: (a) coordination of terrestrial services in the frequency bands shared with the space services above 100 MHz under provisions RR9.16, RR9.18 and RR9.19; (b) Obtaining agreement for terrestrial services in the bands which are indicated in the Article 5 footnotes making reference to provision RR9.21; (c) Coordination of stations of non-planned terrestrial services operating in the bands and geographical areas covered by different Regional Agreements (e.g. GE85-EMA) vis-à-vis planned services; and (d) coordination required by some WRC Resolutions (e.g. Resolution 612 (WRC-12)). Voluntary coordination: direct coordination between administrations concerned without involvement of the Radiocommunication Bureau, e.g. coordination of cellular networks in border areas