The Canadian ELD mandate specifies that a driver can switch between different cycles by taking an extended period of off duty as indicated by the rule set, e.g. to switch from Canada S of 60°N Cycle 1 (7 day) to Canada S of 60°N Cycle 2 (14 day) cycles a driver needs to take at least 36 hours consecutive off duty time.
A driver can end and reset the current cycle at any time after accumulating any number of hours in a cycle. A driver does not need to complete the current cycle before taking a cycle reset. The driver must record changes to the start time for the day and cycle in the daily log.
After taking the required off duty time (cycle reset), the driver can start a new cycle and resume driving (i.e., on-duty time starts from zero). During a cycle, the day begins at the same time every day.
Ref: Alberta Motor Transport Association, Alberta Reference Guide for Hours of Service Training Development, June 23, 2008.