Page:United States Statutes at Large Volume 54 Part 2.djvu/249

 54 STAT.] MULTILATERAL-TELECOMMUNICATION-APR. 8, 1938 [167] §13. In the band 460 to 550 kc (652 to 545 m) no type of emis- sion capable of rendering inoperative the distress, alarm, safety, or urgent signals sent on 500 kc (600 m) shall be authorized. [168] §14. (1) In the band 325 to 345 kc (923 to 870 m), no type of emission capable of rendering inoperative distress, safety, or urgent signals shall be authorized. [169] (2) This rule shall not apply to regions in which special agree- ments provide otherwise. [170] §15. (1) In principle, any station carrying on a service between fixed points on a wave with a frequency below 110 kc (wave- length above 2,727 m) must use only one frequency, chosen from the bands allocated to the said service (§7 above), for each of its trans- mitters capable of simultaneous operation. [171] (2) A station shall not be permitted to use a frequency other than that allocated as stated above, for a service between fixed points. [172] §16. In principle, the stations shall use the same frequencies and the same types of emission for the transmission of messages by the unilateral method as for their normal service. Regional arrange- ments may, however, be made for the purpose of exempting the sta- tions concerned from complying with this rule. [173] §17. A fixed station may, as secondary service, on its normal working frequency, make transmissions intended for mobile stations on the following conditions: [174] (a) that the administrations concerned deem it necessary to use this exceptional working-method; [175] (b) that no increase in interference results therefrom. [176] §18. In order to facilitate the exchange of synoptic meteoro- logical messages in the European regions, the frequencies of 41.6 kc, 42.25 kc, 89.5 kc, and 99.85 kc (7,210 m, 7,100 m, 3,352 m, and 3,005 m) shall be allocated to the meteorological service. [177] §19. (1) To facilitate rapid transmission and distribution of information of value in the detection of crime and pursuit of criminals, a frequency between 37.5 and 100 kc (between 8,000 and 3,000 m) shall be reserved for this purpose by regional arrangements [namely, for Europe, the wave of 83.40 kc (3,597 m)]. [178] (2) In addition, the frequencies of 3,490 kc (85.96 m), 4,165 kc (72.03 m), 6,792 kc (44.17 m) shall be assigned to police services, in the regions located outside of the American Continents. [179] §20. Each administration may allocate to amateur stations fre- quency bands in accordance with the allocation table (§7 above). [180] §21. In order to decrease interference in the frequency bands above 4,000 kc (wavelengths below 75 m), used by the mobile service, and particularly in order to avoid interfering with the long-distance telephone communications of this service, the administrations agree to 1469 Distress, etc., sig- nals, interferences. Use of only one frequency. Transmissions for mobile stations; con- ditions. Exchange of synop- tic meteorological messages. Criminal detection, etc. Police services. Amateur stations. Interference provi- sions.

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