The interplay between the list of provincial powers in section 92, and the corresponding list of federal powers in
section 91, has been one of the most heavily litigated issues since
Confederation in 1867. The relationship between the federal and provincial powers is generally referred to as the "division of powers", meaning federalism issues, not
separation of powers. Both the provincial powers and the federal powers are stated to be exclusive, not concurrent. A subject matter which falls within provincial legislative jurisdiction therefore does not come within federal jurisdiction, and
vice versa. Canadian constitutional analysis uses the term
ultra vires as shorthand for a matter that is outside the jurisdiction of a government, and
intra vires for a matter that is within the jurisdiction of a government. Related constitutional doctrines such as
paramountcy and
inter-jurisdictional immunity are also used to assess the constitutionality of a law under the division of powers. Although some of the Fathers of Confederation, such as
John A. Macdonald, favoured a strong central government, other Fathers of Confederation, such as
Oliver Mowat, were more inclined to broader provincial powers. Quebec has traditionally favoured stronger provincial powers. In the late 19th century and early 20th century, the
Judicial Committee of the Privy Council, the highest appellate body of the
British Empire, issued a series of decisions which expanded provincial powers at the expense of federal powers. == Other sources of provincial jurisdiction==