General amending formula (7/50 formula)

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The General amending formula (7/50 formula) is the primary procedure for changing Canada’s Constitution, requiring approval from the federal Parliament and at least seven provinces representing at least 50% of the national population.

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Surface form Occurrences
General amending formula 0

Statements (47)

Predicate Object
instanceOf constitutional amending procedure
federal-provincial amending formula
part of the Constitution of Canada
adoptedAsPartOf patriation of the Constitution of Canada
alsoKnownAs 7/50 amending formula
7/50 formula
appliesTo Constitution of Canada
bindingOn Canadian federal government (Ottawa)
surface form: federal government of Canada

provincial governments of Canada
cameIntoForce 1982
constitutionalProvisionType general rule with specified exceptions
constitutionalStatus entrenched
country Canada
excludes territorial governments
federalRole requires a resolution of the Senate and House of Commons
governs how most future constitutional changes are made in Canada
isPartOf Constitution Act, 1982
Constitution Act, 1982
surface form: Part V of the Constitution Act, 1982
languageOfEnactment English
French
legalBasis Constitution Act, 1982
legalEffect no constitutional amendment within its scope is valid without meeting the 7/50 thresholds
notUsedFor amendments changing the principle of proportionate representation of the provinces in the House of Commons
amendments changing the use of English or French language rights in Canada
amendments concerning the composition of the Supreme Court of Canada in certain respects
amendments concerning the office of the Queen, Governor General and Lieutenant Governors
amendments requiring unanimous consent of the provinces
amendments under the federal unilateral amending procedure
amendments under the provincial unilateral amending procedure
populationThreshold at least 50% of the population of all the provinces
primaryPurpose to provide the general procedure for amending the Constitution of Canada
provincialRole requires resolutions of at least seven provincial legislative assemblies
relatedConcept Constitution Act, 1867
federal unilateral amending procedure
provincial unilateral amending procedure
unanimity formula
replaced United Kingdom’s role in amending the British North America Acts
requires formal constitutional amendment process
requiresApprovalFrom House of Commons of Canada
Parliament of Canada
Senate of Canada
at least seven provincial legislatures
requiresPopulationCalculation based on provincial, not territorial, populations
scope applies to amendments affecting multiple provinces
applies to most structural changes to federal-provincial arrangements
section Section 38 of the Constitution Act, 1982
usedFor most amendments to the Constitution of Canada

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Constitution Act, 1982 established General amending formula (7/50 formula)