Amateur Radio Operator in Canada Must Identify Period

The operator of an amateur station in Canada shall identify the station by transmitting the call sign assigned to that station at intervals of not more than 30 minutes throughout the period of exchange of communication.

9. Station Identification

9.1 The operator of an amateur station in Canada shall identify the station by transmitting the call sign assigned to that station.

9.2 The operator of an amateur station licensed by the Government of the United States shall identify the station:

• (a) by transmitting the call sign assigned to the licensee’s station by the Federal Communications Commission;
• (b) if transmitting:
  • (i) by radiotelephony, by adding the word "mobile" or “portable,” or
  • (ii) by radiotelegraphy, by adding an oblique character (“/”); and
• (c) by adding the Canadian amateur call sign prefix set out in Column I of an item of Schedule IV for the geographical location of the station set out in Column II of that item.

9.3 The operator of any amateur station shall transmit the applicable identification referred to in Section 9.1 or 9.2 as appropriate, in English or in French, at the beginning and at the end of each period of exchange of communication or test transmission, and at intervals of not more than 30 minutes throughout the period of exchange of communication.

https://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf01226.html#p10