The call sign of an amateur radio station must be transmitted:

Canadian amateur radio regulations dictate specific intervals for station identification to ensure transparency on the airwaves. By law, you must identify your station at the beginning and at the end of every communication. Furthermore, if you are engaged in a long conversation, you are required to transmit your call sign at intervals not exceeding 30 minutes. This rule applies uniformly across all modes of transmission, whether you are using voice, digital, or Morse code. Distractors suggesting 3-minute or 10-minute intervals are incorrect under Canadian rules. The 10-minute rule is specifically an American (FCC) regulation, which frequently trips up operators studying in or near the United States.