1.5.4 1X the channel number of the proposed or allotted channel 1X Required for submissions in accordance with Nos. 25/1.1.1, 25/1.1.2 or 25/1.25 of + Appendix 25 if the assistance of the Bureau is not requested under No. 25/1.3.1 of Appendix 25 1.5.5 1Y the channel number of the alternative proposed channel O 1Y 1.5.6 1Z the channel number of the channel to be replaced 1Z + Required if the administration needs to replace its existing allotted channel 1.5.7 1AA the lower limit of the usable frequency range within which the carrier and the bandwidth of 1AA the emission will be located + Required for adaptive systems in the fixed or mobile service operating in the bands between 300 kHz and 28 MHz (see also Resolution 729 (Rev.WRC-07)) 1.5.8 1AB the upper limit of the usable frequency range within which the carrier and the bandwidth of 1AB the emission will be located + Required for adaptive systems in the fixed or mobile service operating in the bands between 300 kHz and 28 MHz (see also Resolution 729 (Rev.WRC-07)) 1.5.9 1C 1C the preferred band, in MHz In the case of maritime mobile frequency allotment, required if the assistance of the Bureau is requested under No. 25/1.3.1 of Appendix 25 + + In the case of an HF broadcasting station under Article 12, required for notices if assistance is requested in accordance with No. 7.6 1.5.10 For digital broadcasting (except assignments subject to § 5.1.3 of the GE06 Regional Agreement):
1.5.4 1X the channel number of the proposed or allotted channel Required for submissions in accordance with Nos. 25/1.1.1, 25/1.1.2 or 25/1.25 of Appendix 25 if the assistance of the Bureau is not requested under No. 25/1.3.1 of Appendix 25 + 1X 1.5.5 1Y the channel number of the alternative proposed channel O 1Y 1.5.6 1Z the channel number of the channel to be replaced Required if the administration needs to replace its existing allotted channel + 1Z 1.5.7 1AA the lower limit of the usable frequency range within which the carrier and the bandwidth of the emission will be located Required for adaptive systems in the fixed or mobile service operating in the bands between 300 kHz and 28 MHz (see also Resolution 729 (Rev.WRC-07)) + 1AA 1.5.8 1AB the upper limit of the usable frequency range within which the carrier and the bandwidth of the emission will be located Required for adaptive systems in the fixed or mobile service operating in the bands between 300 kHz and 28 MHz (see also Resolution 729 (Rev.WRC-07)) + 1AB 1.5.9 1C the preferred band, in MHz In the case of maritime mobile frequency allotment, required if the assistance of the Bureau is requested under No. 25/1.3.1 of Appendix 25 In the case of an HF broadcasting station under Article 12, required for notices if assistance is requested in accordance with No. 7.6 + + 1C 1.5.10 For digital broadcasting (except assignments subject to § 5.1.3 of the GE06 Regional Agreement):
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