(6)Spectrum sharing within a common frequency band between bidirectional wireless broadband use (uplink and downlink), on the one hand, and unidirectional television broadcasting or wireless audio PMSE use, on the other hand, is technically problematic.

Supplemental downlink is downlink-only use whereby spectrum within the band is used for unidirectional base station transmission providing electronic communications services, in combination with use of spectrum in another frequency band.

Based on that agreement So.Ge.A.AL was to pay marketing contributions of (i) EUR [.] per annum for the first daily year-round rotation on each international route, (ii) EUR [.] for the second daily summer-only rotation on each route, and (iii) a one-off introductory marketing contribution of EUR [.] in respect of the first year of operation of each international route other than the London route and a further EUR [.] for each of the second and third years of operation of such new route.

(5) Following the Thessaloniki European Council, it is necessary to formalise the existence and functioning of such a network - drawing on experiences gained in the operation of running projects, including the Belgian-led Western Balkans ILO network - through a legally binding act, setting out the obligation to establish forms of cooperation among immigration liaison officers of the Member States, the objectives of such cooperation, the functions and appropriate qualifications of such liaison officers, as well as their responsibilities vis-à-vis the host country and the sending Member State.

Radio systems following this basic subset allow for simplex and half-duplex voice communication and use of operating signals (tones), but not for selective calls and for data transmission:

Radio systems following this basic subset allow for simplex and half-duplex voice communication and use of operating signals (tones), but not for selective calls and for data transmission: