Historical origins During the colonial period, the local legislatures were based on the model of the British Parliament.
Royal assent to a bill was required for each bill passed by the colonial legislatures. The colonial governors had the power to grant or withhold royal assent on behalf of the monarch. If a governor granted royal assent to a bill passed by a colonial legislature, it became law. If the governor refused royal assent, the bill died. In addition to granting or withholding royal assent, the colonial governors had a third option: they could
reserve a bill for consideration by the monarch, in effect, the
British government, which could consider whether the bill was consistent with British colonial policy. The British government could advise the monarch to grant or refuse royal assent to a reserved bill. When
responsible government was established in the British North American provinces (starting with Nova Scotia in 1848), the governors effectively lost the power to deny royal assent. Under the principles of responsible government, the governors would only exercise their powers on the advice of the elected government. In theory they retained the power to deny royal assent, but by
constitutional convention, if a bill was passed by the houses of a legislature, the governor normally granted royal assent, since the bill expressed the wishes of the elected representatives. This principle was established in the
Province of Canada in 1849, when Governor General
Lord Elgin granted royal assent to the controversial
Rebellion Losses Bill. The bill was passed by both houses of the
Parliament of the Province of Canada, as a measure proposed by the government of
Louis-Hippolyte Lafontaine (co-premier from Canada East) and
Robert Baldwin (co-premier from Canada West). The bill was to compensate residents of
Canada East (now
Quebec) who had suffered property losses during the
Lower Canada Rebellion of 1837–1838. The
Tory opposition members of the Parliament strongly opposed the measure, arguing that it compensated disloyal French-Canadians, even though a similar bill had been passed a few years earlier to compensate residents of Canada West (now
Ontario) who had suffered property losses during the similar
Upper Canada Rebellion. The Tory opposition members called on Lord Elgin to deny royal assent. With this change in the role of the Governor General, the provision for reservation of a bill for the monarch's consideration ceased to have any political justification. Based on the Balfour Declaration, three years later the British and Dominion governments agreed that the British government would no longer instruct the governors general to reserve bills. Since the Governor General of Canada now takes advice solely from the federal Cabinet, and grants royal assent on the advice of the federal Cabinet, there is no likelihood that the federal Cabinet would advise the Governor General to reserve royal assent to a bill passed by both houses of Parliament. The reservation power with respect to federal bills has thus been nullified by constitutional convention. Although the power of reservation of federal bills is still mentioned in sections 55 and 57, it is now anachronistic. == Difference from disallowance of acts ==