The amount of notice the employer must give an employee depends on:

Termination notice requirements come from the employment standards legislation that applies to the workplace, which is tied to the jurisdiction where the employee works (province/territory), unless the workplace is federally regulated. The Government of Canada explicitly directs employers and employees to consult the employment standards for the province or territory of work if they are not in a federally regulated industry.

Within a given jurisdiction, the minimum notice (or pay in lieu) is typically based on the employee’s length of continuous employment/service. For example, under the Canada Labour Code (federally regulated workplaces), required notice increases with service (and can be replaced with wages in lieu), showing service length is a core driver of notice entitlements.

That’s why “where they live” is not the deciding factor for notice rules: the governing employment standards are based on the jurisdiction of employment (where the work is performed / the employment is regulated), and the employee’s length of service under that jurisdiction’s rules.