I wonder how long until we start seeing this challenged in the courts...

https://laws-lois.justice.gc.ca/eng/const/page-15.html

Mobility Rights Mobility of citizens 6. ( 1) Every citizen of Canada has the right to enter, remain in and leave Canada.

Rights to move and gain livelihood (2) Every citizen of Canada and every person who has the status of a permanent resident of Canada has the right

(a) to move to and take up residence in any province; and (b) to pursue the gaining of a livelihood in any province.

Limitation (3) The rights specified in subsection (2) are subject to

(a) any laws or practices of general application in force in a province other than those that discriminate among persons primarily on the basis of province of present or previous residence; and (b) any laws providing for reasonable residency requirements as a qualification for the receipt of publicly provided social services.

Affirmative action programs (4) Subsections (2) and (3) do not preclude any law, program or activity that has as its object the amelioration in a province of conditions of individuals in that province who are socially or economically disadvantaged if the rate of employment in that province is below the rate of employment in Canada.