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CONDITIONS OF LICENCE.
1. The sending apparatus used at the station shall be as described and specified in the diagrams and particulars hereto annexed.
[NOTE:-Diagrams and particulars, in duplicate, must accompany every applica- tion for a licence. One set will be retained by the Postmaster General, and the other will be annexed to the licence.]
2. The combined height and length of the aerial shall not exceed 100 feet.
3. In case any aerial of the licensee crosses or will cross above or is or will be liable to fall upon or be blown onto or against any overhead power wire (including electic lighting and tramway wires) the licensee shall notify the owner of such overhead power wire and shall provide, fix and maintain, to the reasonable satisfaction of such owner, proper and adequate guards against contact.
4. The power used for transmission shall be as specified in the particulars hereto annexed, and messages shall be sent only on the wave lengths (tonic-train, C.W. and telephony) as specified in the particulars. Spark transmission is specifically forbidden.
NOTE:-In no case will a licence be granted for power exceeding ten watts.
5. The station shall always be equipped for reception as well as transmission, and the sending apparatus shall invariably be tuned accurately within the limits specified in the particulars.
6. Messages may be sent at any time, but the time occupied in transmission shall not exceed two hours during any consecutive period of twenty-four hours.
7. A record shall be kept of all transmissious, showing the date and times of each transmission and the wavelength and system (tonic-train, C.W. or telephony) employed.
8. No transmission shall commence without listening-in on the wavelength which is to be used in order to ascertain whether the proposed transmission is likely to interfere with any other station which may be working. No single transmission shall last for more than ten consecutive minutes and each transmission shall be followed by a period of not less than three minutes listening-in on the wavelength used for transmission. Such listening-in must be in all cases performed by the licensee in person. Trans- mission shall at once be discontinued or postponed at the request of any Government or commercial station.
9. Messages shall be transmitted only to stations which are actually co-operating in the licensee's experiments and shall relate solely to such experiments. The use of the apparatus for general calls or transmission of news, advertisements, or similar matter is strictly forbidden.
10. The call signal...
is allotted to the licensee's station.
In calling up another transmitting station the call signal of that station should be sent three times, the word "from" once, and the call signal of the sending station three times. In answering a call, the call signal of the calling station should be sent three times, the word "from once and the call signal of the station once. The call signal of the station transmitting should also be sent three times at the beginning and end of each subsequent period of transmission and on every occasion when the wavelength is changed.
NOTE: Call signals are not allotted to stations for receiving only.
11. Before beginning to call, the licensee must adjust his receiving-apparatus to the highest possible degree of sensitiveness, and make sure that the station which he wishes to call is not engaged in communication and that no excessive interference will be caused to other communication in progress within range on the frequency to be used. If the licensee finds that transmission is taking place, or that there is a probability of such interference occurring, he must wait for the first break before calling, unless he has ascertained that his working will not interfere with communication in progress.
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