54 STAT.] MULTILATERAL-TELECOMMUNICATION-APR. 8, 1938 1433 not answer within six weeks after the receipt of the said communication shall be considered as having given its assent. [89] (d) It is fully understood that such a preliminary agreement shall also be necessary whenever, in a European broad- casting station, operating outside the authorized fre- quency bands, a change is made in the characteristics previously notified to the Bureau of the Union, and when such change is capable of affecting the conditions of inter- national interference. [90] §5. In principle, the power of broadcasting stations working on frequencies below 5,000 kc (wavelengths above 60 m) must not exceed the value necessary to insure economically an effective high-quality national service within the limits of the country considered. [91] §6. In principle, the location of powerful broadcasting stations, and especially of those which operate near the limits of the frequency bands reserved to broadcasting, must be chosen in such a way as to avoid, so far as possible, interference caused to the broadcasting services of other countries or to other services operating on neigh- boring frequencies. [92] §7. The following table shows the allocation of frequencies (ap- proximate wavelengths) to the various services. ALLOCATION OF FREQUENCY BANDS BETWEEN 10 AND 200,000 KC (30,000 AND 1.5 M) Services Frequnces Wavelengths Regional allocations General ______________________ allocation ka n European region* Other regions 10-100 30, 000-3 , 000 Fixed 100-110 3, 000-2, 727 (a) Fixed (b) Mobile 110-125 2, 727-2, 400 Mobile 125-150 2, 400-2, 000 Maritime mobile (open to public correspond- (t) ence exclusively) 150-160 2, 000-1, 875 Mobile (2) ____________________________________ [93] *Defintion of the European regpon: The European region is limited on the north and west by the natural boundaries of Europe, on the east by the meridian 40° E. of Greenwich and on the south by the parallel 30° N., so as to include the western part of the U.S.S.R . and the territories bordering on the Medi- terranean, except the parts of Arabia and Saudi Arabia which are included in this sector. [94] a The wave of 143 kc (2,100 m) is the calling-wave of mobile stations using long continuous waves. [95] , A European or regional conference may admit one or several broadcasting stations by derogation, provided that mobile services are not hampered.
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