"From Spark to Space; The Story of Amateur Radio in Canada" (Saskatoon Amateur Radio Club, 1968) reprints the first set of Canadian radiotelegraph regulations (June 1914). The one class of Amateur Experimental Stations could not exceed 1/2 kilowatt "at the terminals of the transformer." Permitted wavelengths depended upon the distance from "a commercial coast or land station or a route of navigation." As to operator qualifications, the regulations provided that:
"Candidates for an amateur certificate will be examined in the adjustment and operation of the apparatus they propose to operate and will be required to have a satisfactory knowledge of the Departmental regulations governing the working of amateur experimental stations [regulations cited]....
The examinations will be practical and viva voce [i.e., oral] and the candidates will be required to send and receive in the International Morse Code at a speed of not less than five words a minute and to distinguish from other signals the signals "SOS", "STP" and the call signal of his station when repeated several times at a speed of ten words a minute."
The dual code-speed requirement seems interesting and unique. I suppose that "STP" meant "stop transmitting"