Parliamentary Sovereignty in Canada

Introduction

Parliamentary sovereignty — the principle that Parliament is the supreme law-making body — is a foundational concept of the British constitutional tradition inherited by Canada. In its classical formulation by A.V. Dicey, Parliament can make or unmake any law whatsoever, and no person or body has the right to override or set aside Parliament’s legislation. However, Canada has significantly modified this doctrine through three fundamental constitutional features: federalism, constitutional supremacy, and the Charter of Rights and Freedoms.

The Classical Doctrine

Dicey’s formulation of parliamentary sovereignty rests on two pillars:

1. Positive aspect: Parliament has the unrestricted power to enact any law on any subject.
2. Negative aspect: No court or other body may question the validity of Parliament’s enactments.

This doctrine developed in the United Kingdom in the aftermath of the Glorious Revolution (1688) and the Bill of Rights (1689), reflecting the triumph of Parliament over the Crown. In the Westminster model, the Crown-in-Parliament exercises legislative omnipotence.

Constitutional Supremacy

The most fundamental limitation on parliamentary sovereignty in Canada is constitutional supremacy, codified in section 52(1) of the Constitution Act, 1982:

“The Constitution of Canada is the supreme law of Canada, and any law that is inconsistent with the provisions of the Constitution is, to the extent of the inconsistency, of no force or effect.”

This provision establishes that neither the federal Parliament nor provincial legislatures are sovereign in the Diceyan sense. All legislation must conform to the constitutional framework, including:

• The division of powers between federal and provincial governments (sections 91 and 92 of the Constitution Act, 1867)
• Indigenous and treaty rights protected by section 35 of the Constitution Act, 1982
• The Canadian Charter of Rights and Freedoms

Federalism as a Limit

Canada’s federal structure inherently limits the sovereignty of both levels of government. The Constitution Act, 1867 divides legislative authority between the federal Parliament and provincial legislatures through sections 91 and 92. Each level of government is supreme within its assigned sphere, but neither can legislate on matters allocated to the other.

The judicial enforcement of federalism through constitutional division of powers analysis means that courts regularly declare legislation ultra vires the enacting body. In Reference re Secession of Quebec, [1998] 2 SCR 217, the Supreme Court identified federalism as one of the four foundational unwritten constitutional principles, alongside democracy, constitutionalism and the rule of law, and respect for minorities.

The Charter and Section 33

The Canadian Charter of Rights and Freedoms imposes substantive limits on legislative power. Section 1 permits reasonable limits on Charter rights that are demonstrably justified in a free and democratic society, and section 52(1) renders inconsistent laws of no force or effect.

The Notwithstanding Clause

Section 33 of the Charter introduced a unique mechanism — the notwithstanding clause (or override clause) — that partially preserves parliamentary sovereignty within the Charter framework. Section 33 permits Parliament or a provincial legislature to declare that a law operates notwithstanding certain Charter rights (sections 2 and 7–15) for a renewable period of five years.

The notwithstanding clause reflects a compromise between competing visions of constitutionalism:

• The US model of judicial supremacy in rights enforcement
• The Westminster model of legislative supremacy
• The dialogue theory of interaction between courts and legislatures

Section 33 has been used infrequently. Quebec applied it systematically to all legislation following the failure of the Meech Lake Accord (1988–2002). Alberta invoked it in relation to marriage definition legislation (2000). Saskatchewan used it in back-to-work legislation (2017). Ontario used it in 2021 to restore elements of election financing law that had been struck down, and again in 2025 in relation to education and child welfare policies.

The political cost of invoking the notwithstanding clause has generally restrained its use, reflecting constitutional conventions that supplement formal legal restrictions.

The Secession Reference and Unwritten Principles

In Reference re Secession of Quebec, the Supreme Court identified unwritten constitutional principles that constrain legislative action even absent express textual limitation. The Court held that democracy cannot be reduced to simple majority rule and that the constitutional order rests on principles including federalism, democracy, constitutionalism and the rule of law, and protection of minorities.

These unwritten principles operate as organizing principles of the Constitution and may inform the interpretation of express provisions. Their status as independent constraints on legislative sovereignty remains contested. In Reference re Senate Reform, [2014] 1 SCR 704, the Court held that unwritten principles can ground constitutional review, while in British Columbia (Attorney General) v. Canada (Attorney General); Reference re Securities Act, [2011] 3 SCR 537, the Court declined to rely on unwritten principles to reshape federal-provincial relations.

Delegated Legislation

A further modification of parliamentary sovereignty involves delegated legislation (regulations, rules, by-laws). While Parliament may delegate its law-making power to the executive or administrative agencies, it cannot abdicate its legislative authority. The principle against subdelegation requires that delegated authority be exercised within the confines of the enabling statute.

Courts review delegated legislation for:

• Vires (whether the delegate acted within the scope of the delegated authority)
• Reasonableness (post-Vavilov)
• Constitutional compliance

Comparative Perspectives

United Kingdom

The UK retains the strongest form of parliamentary sovereignty, though EU membership (1973–2020) and the Human Rights Act 1998 (permitting declarations of incompatibility but not invalidating legislation) created qualifications now partially unwound. The UK Supreme Court lacks power to strike down primary legislation.

Australia

Australia combines constitutional federalism and judicial review with the absence of a comprehensive bill of rights. The Australian Constitution protects specific rights (e.g., just terms for acquisition of property, trial by jury, freedom of religion) but gives legislatures broad authority. The High Court has implied limited political rights from the system of representative government.

Conclusion

Parliamentary sovereignty in Canada survives as an important organizing concept but is fundamentally modified by constitutional supremacy, federalism, and the Charter. The notwithstanding clause represents the most explicit textual acknowledgment of the tension between legislative and judicial supremacy. Canadian constitutional law has evolved a distinctive model that rejects both absolute parliamentary sovereignty and pure judicial supremacy, embracing instead a dialogic relationship between courts and legislatures within the framework of a living constitution.