Canada, of course, doesn't have an official poverty line. In measuring low income we use the standard Statistics Canada post-tax low-income cut-off. It's the measure that's used in all their publications relative to measuring low income in Canada. People often refer to it as the poverty line. Statistics Canada continues to underline that it isn't a poverty line, but rather a measure of low income.
It's a constructed figure. People who spend 20 percentage points more on the necessities than the average family or individual are deemed to be below the low-income cut-off. That's how the number is constructed.
It is a very standard measure that's used across groups to describe low income in Canada.