Under responsible government, what must a government do if it loses a confidence vote?

Upper and Lower Canada were joined into one colony in 1840, the Province of Canada. Robert Baldwin and Sir Louis-Hippolyte La Fontaine were reformers who pressed British governors for responsible government, and Joseph Howe pushed the same cause in Nova Scotia. Several reformers of that period went on to be named Fathers of Confederation, among them Sir George-Étienne Cartier and Sir Étienne-Paschal Taché. Sir John A. Macdonald was one of them too; earlier he had served in Upper Canada's voluntary government militia.

Nova Scotia got there first. In 1847-48 it became the earliest colony in British North America with full responsible government. Lord Elgin, who governed United Canada, brought the same system in during 1848-49, with London urging him on. Canada still works this way. When a government loses a vote of confidence in the assembly, it has to resign. La Fontaine, a defender of democracy and of French language rights, then led the first responsible government formed in the Canadas.