54 STAT.] MULTILATERAL-TELECOMMUNICATION-APR. 8 , 1938 1485 necessary, elementary knowledge of one language very widely used in the international correspondence of the mobile service. Candidates must be capable of express- ing themselves in a suitable manner, both verbally and in writing. Each government shall determine itself which language or languages will be required. D. SPECIAL RADIOTELEGRAPH OPERATOR'S CERTIFICATE [250] §6. (a) The radiotelegraph service of ships and all vehicles other than aircraft for which a radiotelegraph installa- tion is not required by international agreements may be carried on by operators holding a special radiotelegraph operator's certificate. [252] (b) The radiotelegraph service of aircraft serving regular inter- national or intercontinental lines-the stations of which are capable of entering into communication with land or mobile stations of services other than aeronautical services-but not permitted to take part in the interna- tional service of public correspondence may also be car- ried on by operators holding a special radiotelegraph operator's certificate. [253] (c) This certificate shall be issued to operators capable of per- forming radio communications at the sending and receiv- ing speed required for obtaining a second-class radio- telegraph operator's certificate. [254] (d) It shall devolve upon each interested government to deter- mine the other requirements for obtaining this certifi- cate. E. LIMITED RADIOTELEGRAPH OPERATOR'S CERTIFICATE FOR THE AERO- NAUTICAL SERVICES [255] §7. (a) In the aeronautical services, a limited radiotelegraph operator's certificate may be issued to operators of air- craft stations not engaged in public transportation (tourist airplanes) which, in general, shall not be authorized to make use of the radio service organized for regular international or intercontinental lines, nor to enter into communication with mobile stations or land stations of services other than the aeronautical services, nor to take part in the service of public correspondence, provided that these operators are capable of performing radio communications at a minimum speed of 16 words per minute, in plain language, in their national language. [256] (b) This limited certificate may be issued only in application of regional agreements concluded between interested gov- ernments, laying down, in particular, the other condi- tions for obtaining this certificate and the areas in which it will be valid. [258] (c) This limited certificate shall authorize its bearer solely: [259] 1. To perform the service of on-board stations able to operate only in bands or on frequencies reserved exclusively for the aeronauti- [257] 1As an exceptional case, the Government of New Zealand shall be pro- visionally granted the right to issue a limited certificate-to be obtained upon conditions which it shall determine-to operators of low-tonnage vessels of its nationality, who shall not travel far from the coasts of the said country nor take part in the general work of mobile stations except to a limited degree. Such operators shall be forbidden to participate in the international service of public correspondence. Special certificate. Limited certificate. [249] (h) If
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