Mar. 5.] THE NEW ZEALAND GAZETTE. 669

53. The power rating of the radio transmitter in an amateur transmitting and receiving or an experimental station shall be as determined by the Minister.

54. In cases in which approved research work is being undertaken, and which would be facilitated by no other means than by an extension of the powers conferred by a license issued in pursuance of these regulations, and upon application in writing being made in that behalf, the Minister may, at his discretion, grant in writing such temporary privileges as in his opinion may be necessary to cover the object in view.

55. No restrictions shall be imposed by the Minister regarding the type or dimensions of a transmitting antenna, provided that the requirements as to operating wave-lengths are strictly complied with, and that no interference with the operation of other radio services is caused by reason of the type or dimensions of the antenna employed.

56. Amateur transmitting and receiving stations and experimental stations shall be equipped for reception as well as for transmission, and shall observe the conditions relating to the keeping of a watch for the interference warning signal, AAAAQRM, prescribed in Regulation 63 hereof.

57. The range of wave-lengths for reception shall not be limited.

58. The type and dimensions of an antenna intended for reception only shall not be limited by these regulations.

59. (1.) In the interests of radio-telegraphy generally, the types of receiving circuits authorized by the license shall not include those which, in the judgment of the Minister, unduly energize the receiving antenna.

(2.) All receiving circuits shall be loosely coupled.

(3.) The Minister may, at his discretion, and upon whatever terms he deems desirable, permit certain approved types of circuits which energize the receiving antenna to be employed with loop antennae or similar devices, provided that an applicant for such permission expressly undertakes in writing not to employ such circuits other than in the manner approved by the Minister.

60. All receiving circuits employing magnetic reaction shall be so designed as to provide loose coupling of the reaction coil; and the degree of coupling shall be readily adjustable.

61. All the technical provisions of the license of a radio station relating to power, wave-length, type of transmitter, and the like shall be faithfully observed, and no unauthorized variation shall be made therein; and the station shall at all times be maintained at the highest possible degree of efficiency and selectivity.

INTERFERENCE AND SOS SIGNALS.

62. (1.) Licensed radio stations shall at all times be operated in such a manner as to avoid interference with other radio stations, and, in particular, with Government, coast, and ship stations.

(2.) Amateur transmitting and receiving stations and experimental stations shall be guided by the principles laid down in Sections 1 and 2A of Article 7 and Sections 3 and 5 of Article 24 of the Detailed Service Regulations appended to the Radio Telegraph Convention, 1912.

63. (1.) Licensees or operators of amateur transmitting and receiving and of experimental stations must, after every transmission or short series of transmissions, listen for the interference warning signal, AAAAQRM (Here follows a number indicating minutes), and transmitted by a Government station on 600 metres, and must immediately cease transmission upon receipt of the warning signal until the time indicated has expired.

(2.) The greatest care must be exercised on the part of licensees and operators to avoid interfering with the receipt and handling by Government, coast, or ship stations of the international distress signal, SOS (...— — —...), and of any radio communications that may be exchanged in connection therewith.

64. If, in connection with his use of the 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, a coast, or a 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.

CALL SIGNALS.

65. Every amateur transmitting and receiving station and experimental station licensed under these regulations shall be allotted an official call signal, by which the station shall be identified, and which is to be used in the manner prescribed in Regulations 69-71 hereof, whenever a radio communication is caused to be transmitted from the said radio station.