TELECOl\nIU~ICATIOX CONVENTION. DECEMBER 9, 1932. 2541 C. AIRCRAFT STATIONS [455] § 5. For the international service of public correspondence, aircraft stations shall be classified into two categories according to the internal regulations of the administrations to which they are
- subject, as follows:
{456] stations of the first category: these stations shall carry on a continuous service; [467] stations of the second category; these stations shall carry on a limited service of which the duration is not determined by these Regulations. D. GENERAL PROVISIONS ['581 § 6. (1) A mobile station which has no fixed working-hours must advise the land station with which it is in communication of the closing and reopening hours of its service. [469] (2) (a) Every mobile station the service of which is about to close, due to arrival, must so advise the nearest land station and, if necessary, the other land stations with which it generally communicates. It must not close until it has cleared all traffic on hand. [460] (b) At the time of its departure, it must advise the . aforesaid land station or stations of its reopening. E. CLASS AND MINIMUM NUMBER OF OPERAT011S Aircraft stations. General flrovisi')DS (461] § 7 With respect to the international service of public cor- Class and minimum . • numher or operator,. respondence of mobile stations, the personnel of these stations must include at least: . [462] 1. for ship stations of the first category; an operator holding a first-class radiotelegraph operator's certificate; [463] 2. for ship stations of the second category; an operator holding a first- or second-class radiotelegraph operator's certificate; [464] 3. (a) for ship stations of the third category, except in the cases provided for in subparagraphs (b) and (c) below, an operator having successfully passed the examination for a second-clasl'I radio- telegraph operator's certificate; f4M] (b) for ship stations of which radiotelegraph equipment is not made compulsory by international agreements, an operator holding a special certificate covering the conditions con- Ant" p. :!t~7. tained in article 10, D, § 6 (1); [46G] (c) for ship stations equipped with a low-power radiotelephone installation, an operator holding a radiotelephone operator's certificate covering the conditions contained in article 10, E,§7; [46i] 4. (a) for aircraft stations, except in the cases provided for in subparagraphs (b) and (c) below, an operator holding a first- or second-class radiotelegraph operator's certificate, according to pro- visions of an internal character laid down by the governments to which these stations are subject;
