July 21.] THE NEW ZEALAND GAZETTE. 1691

(2) Any station making emissions for tests, adjustments, or experiments must transmit its call sign frequently during the course of these emissions.

49. Every licensee of a radio-station shall at all times cause the station to be operated in such a manner as to avoid interference with the reception of distress signals.

50. If, in connection with the use of authorized apparatus, any distress signal should come under the notice of a licensee or operator, and there is reason to believe that such signal has not been intercepted by a Government, coast, or ship station, the licensee or operator shall immediately take such steps as may be available (e.g., by telephone) for communicating the same to the nearest Government station, or, if this be impracticable, to a responsible officer of the Post and Telegraph Department.

51. With the exception of broadcasting stations, every transmitting station shall be equipped for reception also; and the licensee shall cause a listening watch to be kept during the whole time the station is open except during such time as the station is actually transmitting.

52. (1) Licensed radio-stations shall at all times be operated in such a manner as to avoid excessive interference with the services of other radio-stations, and, in particular, with Government stations and stations engaged in the international service of public correspondence. Before proceeding with any transmission, the operator of a station (except a broadcasting station) shall make sure that the transmissions about to be commenced will not cause excessive interference with other communications in progress on the frequency to be used; if it is likely that such interference will be caused, he shall await the first break in the transmission of the communications with which interference might be caused.

(2) In the course of continuous transmissions exceeding ten minutes in duration the operator of the station (except a broadcasting station) shall stop sending at the end of every such period and before proceeding with the transmission shall listen for a brief period in order to ascertain whether his transmissions are causing undue interference with another station.

53. (1) In cases in which a specific station is to be called, the call sign of the called station shall be transmitted not more than three times, the word “de” transmitted once, followed by the call sign of the calling station transmitted not more than three times. This formula shall not be repeated more than three times in succession without listening for response. When it is desired to make a general call to all stations, the call sign CQ should replace the call sign of the called station in the foregoing formula.

(2) When a station called does not reply to a call sent three times at intervals of two minutes, the call shall cease and shall not be resumed until after an interval of fifteen minutes. The station calling, before resuming the call, shall make certain that the station called is not at that moment in communication with another station. The call may, however, be repeated at intervals of less than fifteen minutes if there is no reason to believe that it will interfere with communications in progress.

(3) The use of the call CQ followed by the letter K (request for reply) is forbidden, except in combination with signals denoting urgency.

54. In all radio-telegraph services the following order of priority shall be observed:—

(1) Distress calls, distress messages, and distress traffic:
(2) Communications preceded by the urgency signal:
(3) Communications preceded by the safety signal:
(4) Communications relative to direction-finding bearings:
(5) All other communications. In this category the order of priority shall be, in principle, as follows:—

(i) Government radio-telegrams:
(ii) Radio-telegrams relating to the navigation, movements, and requirements of ships, and the safety and regularity of aircraft services, and radio-telegrams containing weather observations destined for an official meteorological service:
(iii) Service radio-telegrams relative to the operation of the radio-electric service or to radio-telegrams previously exchanged:
(iv) Public correspondence.