I would like to know if there is an official definition as to when or what constitutes the start of a 15 minute break in the province of British Columbia, Canada?

If no official definition of when a coffee break actually starts, is there a general rules that most Canadian provinces would follow?

I have a friend who works in a mall and some employees line up at the food court concessions for food or coffee. Does their break start at the moment they are off the floor and in the line up or when they are sitting down having their coffee. Breaks tend to be rather long at times (25 minutes or more, in lieu of simply 15 minutes) for some individuals, especially when the line ups are long.