1
RR25-6
2091
2092
2093
2094
2095
(3) The Secretary-General shäll ensure that the same call sign, the same maritime mobile service identity, the same selective call number or the same identification number is not assigned more than once and that call signs which might be confused with distress signals, or with other signals of the same nature, are not assigned.
§ 18. (1) When a fixed station uses more than one frequency in the international service, each frequency may be identified by a separate call sign used solely for this frequency.
(2) When a broadcasting station uses more than one fre- quency in the international service, each frequency may be iden- tified by a separate call sign used solely for this frequency or by some other appropriate means, such as announcing the name of the place and frequency used.
(3) When a land station uses more than one frequency, each frequency may, if desired, be identified by a separate call sign.
(4) Where practicable, coast stations should use a common call sign for each frequency series '.
Section III. Formation of Call Signs
2096
§ 19. (1) The twenty-six letters of the alphabet, as well as digits in the cases specified below, may be used to form call signs. Accented letters are excluded.
2095.1
1 By "frequency series" is meant a group of frequencies each of which belongs to one of the different bands between 4000 kHz and 27 500 kHz that are allocated exclusively to the maritime mobile service.