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Paramountcy (Canada)

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Title: Paramountcy (Canada)  
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Subject: Canadian constitutional law, Paramountcy, Federalism in Canada, Supremacy Clause, Alberta Act
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Paramountcy (Canada)

In Canadian constitutional law, the doctrine of paramountcy establishes that where there is a conflict between valid provincial and federal laws, the federal law will prevail and the provincial law will be inoperative to the extent that it conflicts with the federal law. Unlike interjurisdictional immunity, which is concerned with the scope of the federal power, paramountcy deals with the way in which that power is exercised.

Nature of the doctrine

Paramountcy is relevant where there is conflicting federal and provincial legislation. As Major J explained in Rothmans:

Claims in paramountcy may arise from two different forms of conflict:[2]

  • Operational conflict between federal and provincial laws, such that dual compliance is impossible.
  • Where dual compliance is possible, but the provincial law is incompatible with the purpose of federal legislation, thus frustrating a federal purpose. To determine whether the impugned legislation frustrates a federal purpose, it is necessary to consider the regulatory framework that governs the matter in question. The party seeking to invoke the doctrine of federal paramountcy bears the burden of proof.


The doctrine was first expressed in the Local Prohibition Case, and was subsequently described by Lord Dunedin in Grand Trunk v. Attorney General of Canada thus:[3]

Historically, the doctrine was interpreted very strictly. When there was any overlap between federal or provincial laws the federal law would always render the provincial law inoperative even where there was no conflict. It was over time that courts and academics began to interpret the power as only applying where conformity to one law would necessarily violate the other. The Supreme Court of Canada adopted the latter interpretation in the decision of Smith v. The Queen. The Court held that there must be an "operational incompatibility" between the laws in order to invoke paramountcy.

The modern use of the paramountcy doctrine was articulated in Multiple Access v. McCutcheon. In that case, both the provincial and federal governments had enacted virtually identical insider trading legislation. The Court found that statutory duplication does not invoke paramountcy as the court had the discretion to prevent double penalties. Instead, paramountcy can only be invoked when then compliance with one means the breach of the other.

A later example of this doctrine was in the decision of Law Society of British Columbia v. Mangat, where the Court found an operational conflict between the provincial Law Society Act prohibiting non-lawyers from appearing in front of a judge and the federal Immigration Act which allowed non-lawyers to appear before the immigation tribunal.

See also


  1. ^ Rothmans, par. 11
  2. ^ COPA, par. 64
  3. ^ Colvin 1979, p. 88
  4. ^ Grand Trunk, at p. 68

Significant cases

Further reading

  • = Centre for Constitutional Studies "Doctrine of Paramountcy". Retrieved 4 February 2014. 
  • Eric Colvin (1979). "Legal Theory and the Paramountcy Rule".  
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