What is the longest period of time an amateur radio station can transmit, without identifying by call sign?

Under Canadian amateur radio regulations, an operator must identify their station by transmitting their call sign at least once every 30 minutes during an ongoing communication. This ensures that any regulatory authority or fellow amateur tuning into a long conversation can readily identify who is transmitting. It is important to remember that this 30-minute rule applies to continuous or prolonged contacts, in addition to the requirement to identify at the beginning and end of the transmission. Note that some other jurisdictions, such as the United States, require identification every 10 minutes, which can sometimes cause confusion for new operators studying international materials.