Page:United States Statutes at Large Volume 49 Part 2.djvu/481

TELECOMMU:S-ICATION CONVENTION. DECEMBER 9, 1932. 2497 [214] (b) in radiotelephony, of all or part of the name of the owner of the aircraft (company or individual) followed by the last two letters of the registration mark. [216] (2) In the case of an aircraft performing a service which concerns the functioning of the League of Nations, the words "Societe des Nations" shall replace the name of the owner of the aircraft. [216) § 4. (1) The 26 letters of the alphabet, as well as the figures, in the cases provided for in § 2, may be used to form call signals; accented letters shall be excluded. [217] (2) However, the following letter combinations may not be used for call signals: [218] (a) combinations beginning with A or B, these two letters being reserved for the geographical part of the International Code of Signals; [219] (b) combinations used in the International Code of Signals, second part; [220) (c) combinations which might be confus~d with distress signals or with other signals of a similar character; [221) (d) combinations reserved for the abbreviations to be used in the radio service. [222) § 5. (1) Each country shall choose call signals for its stations from the international series which is allocated to it and shall notify the Bureau of the Union of the call signals which it has assigned to its stations. [2?3) (2) The Bur~au of the Union shttll see that the same call signal is not allocated more than once and that those call signals which might be confused with distress signals, or with other signals of a similar character, are not allocated. ARTICLE 15 Service Documents (224) § 1. The Bureau of the Union shall prepare and publish the following service documents: [226] (a) The nomenclatmesof all the land, mobile, and fixed stations having a call signal from the international series, whether or not open to public correspondence; the nomenclatures of the stations operating special services, broadcasting, and radio communications between fixed points. [226] (b) The frequency list. This list shall give all the fre- quencies assigned to stations intended to carry on a regular service and which are capable of causing international interference. [227] (c) A nomenclature of the telegraph offices and land stations open to international service. [228] (d) A chart of coast stations open to public correspond- ence. [229] (e) A table and a chart to be annexed to the nomencla- ture of coast and ship stations indicating the zones and hours of service of ships of which the stations belong to the second category (see appendices 4 and 5). Service documents. Post, P p. 2S!J5, 2S97.