Reference Re Resolution to amend the Constitution – also known as the Patriation Reference – is a historic Supreme Court of Canada reference case that occurred during negotiations for the patriation of the Constitution of Canada.
The court affirmed the existence of an unwritten dimension to the constitution and the majority held that by constitutional convention, amendments to the constitution require a substantial degree of provincial consent. However, a differently-constituted majority of the court held that there was no legal barrier to the federal government seeking a constitutional amendment without any provincial consent.