Page:United States Statutes at Large Volume 63 Part 2.djvu/502

 6:3 STAT.] IMULTILATERAL-TELECOMMUNICATIONS-OCT. 2, 1947 1799 (Chapter XI, art. 24 RR) (514-618) determining elements. Moreover, the stability of these frequencies must be maintained by the transmitter itself within the limits of tolerance specified by appendix 3. 514 (4) The radiotelegraph service of ships for which a radiotelegraph installation is not made compulsory by inter- national agreements, as well as the radiotelephone service of ship stations and aircraft stations for which only a restricted radiotelephone operator's certificate is required, may be car- ried out by an operator holding a radiotelegraph operator's special certificate. 515 §7. Exceptionally, the second class radiotelegraph opera- tor's certificate as well as the radiotelegraph operator's special certificate may be limited exclusively to the radiotelegraph service. In such case the certificate must be suitably endorsed. Section III. Conditions for the Issue of Operators' Certificates 516 § 8. (1) The conditions to be imposed for obtaining the vari- ous certificates are contained in the following paragraphs and represent the minimum requirements. 517 (2) Each administration is free to fix the number of examinations necessary to obtain each certificate. 518 §9. The administration which issues a certificate may, before authorizing an operator to carry out the service on board a ship or aircraft, require the fulfillment of other con- ditions (for example: further technical and professional knowledge relating particularly to navigation; physical ilt- ness; for an operator of the aeronautical mobile service, the completion as an operator of a certain number of flying hours; etc.).

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