63 STAT.] MULTILATERAL--TELECOMMUNICATIONS-OCT. 2 , 1947 (Chapter XIII, art. 28 RR) (<841) 582 §8. In ship stations all apparatus installed for the use of class Al emissions on frequencies in the authorized bands between 110 and 160 kc/s must provide, in addition to the frequency 143 kc/s, at least two frequencies selected within these bands. 583 § 9. (1) Sending apparatus used in ship stations working on emissions of class A2 in the authorized bands between 405 and 535 kc/s must be provided with devices readily permitting of a material reduction of power. 584 (2) All ship stations working in the authorized bands between 405 and 535 kc/s must be able to use the frequency 500 kc/s and at least one working frequency. 585 § 10. (1) Every station installed on board a ship compulsorily equipped with radiotelegraph apparatus in accordance with an international agreement must be able to send and receive class A2 emissions: 586 a) on the frequency 500 kc/s, and 587 b) in addition on at least two working frequencies in the authorized bands between 405and 535kc/s. 588 (2) The provisions of 587 do not apply to transmitters on lifeboats, liferafts and survival craft or to emergency (re- serve) transmitters of ship stations. 589 § 11. Any radiotelephone station installed on board a ship which uses the frequency 2 182 kc/s for call and reply must be provided with at least one other frequency in the bands be- tween 1 605 and 2 850 kc/s in which radiotelephone services are admitted. 590 § 12. In ship stations, all apparatus installed for the use of class Al emission on frequencies in the authorized bands between 4 000 and 23 000 kc/s must satisfy the following con- ditions: 591 a) in each of the bands necessary to carry on their service, they must be equipped with at least two 1821
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