Constitutional Interpretation and Principles
The interpretive toolkit
Canadian courts use several approaches. The living tree doctrine, from Edwards v Canada (AG), treats the Constitution as a living organism capable of growth within its original meaning. The purposive approach asks what a provision was intended to achieve. The presumption of constitutionality favours interpretations that preserve legislation. Where text is ambiguous, courts may consult legislative history, but the text and purpose govern.
Charter-specific rules
Section 1 analysis requires a prescribed-by-law limit that is demonstrably justified in a free and democratic society. The Oakes test asks whether the objective is pressing and substantial, whether the means are rationally connected, whether they minimally impair the right, and whether the benefits outweigh the harms. Section 33 permits a legislative override of sections 2 and 7-15, but only if the statute expressly declares it. Section 1 does not apply to the override itself.
Unwritten principles
Federalism, democracy, constitutionalism and the rule of law, and respect for minorities inform interpretation. Courts have used them to protect judicial independence and to require good-faith negotiation. They cannot be invoked to override clear text.
Traps
Questions often confuse the Oakes stages, misstate that section 1 can save a section 33 override, or treat the living tree as unlimited judicial discretion. Another trap is applying the Charter to private conduct without a statutory connection.
Rule of thumb
When a right is engaged, proceed in order: is the Charter applicable, is the right infringed, can the limit be justified, and what remedy follows?