54 STAT.] MULTILATERAL-TELECOMMUNICATION-APR . 8, 1938 in column 3a (appendix 8) opposite the new station and, in column 3b (appendix 8), the date of the assignment of this frequency to this new station. [362] (3) In case of summary notification of a specified frequency without indication of the name of the station, only the date of col- umn 3a (appendix 8) shall be indicated. [363] (4) No date shall be indicated for the frequencies notified col- lectively nor for the frequencies allocated to mobile stations. [364] §12. (1) If, two years after the notification of a frequency to a specified station [the date in column 3b (appendix 8)], the frequency notified has not been placed in operation by this station, the records published by the Bureau of the Union shall be canceled unless the administration concerned, consulted, as a compulsory procedure, by the Bureau of the Union six months before the expiration of the above-mentioned period, shall have requested that it be retained. In this case, the notification dates shall stand. [365] (2) In case of the notification of a frequency when the station to which this frequency is assigned has not been specified, the records published shall be canceled two years after the notification unless the administration concerned, consulted, as a compulsory procedure, by the Bureau of the Union, specifies that the frequency has been placed in operation. [366] (3) The administrations shall notify the Bureau of the Union without delay of the placing in service of the frequencies, of which a complete descriptive list must appear in the frequency list. ARTICLE 17 General RadiotelegraphProcedurein the Mobile Service 12 [367] §1. (1) In the mobile service, the following detailed procedure shall be obligatory except in the case of distress calls or distress traffic to which the provisions of article 24 shall apply. [368] (2) In the exclusively aeronautical service, the procedure contemplated in the present article shall apply, except when special procedures, determined in regional agreements by the governments concerned, shall be in force. [369] (3) For the exchange of radio communications, stations of the mobile service shall use the abbreviations given in appendix 11. [372] Furthermore, in the maritime mobile services only those abbreviations given in appendix 11 may be used. [373] (4) In heavy-traffic areas, ship stations shall take account of the provisions of §2(2) of article 21 [No. 476]. [374] §2. (1) Before transmitting, any station must keep watch over a sufficient interval to assure itself that it will cause no harmful interference with the transmissions being made within its range; if such interference is likely, the station shall await the first stop in the transmission which it may disturb. [370] 1This procedure shall be applicable to short waves so far as possible. [371] 2 The provisions of §§ 2 and 8 shal be applicable to radiotelephone trans- missions of the mobile service. Podt, p. lo. General radiotele- graph proceduro in the mobile snrvice. Post, p. 1653. Post, p. 1621 . Post, p. 152.
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