Similar positions in Canada's three territories are termed "commissioners" and are representatives of the federal government, not the monarch directly.
The offices have their roots in the 16th and 17th century colonial governors of New France and British North America, though the present incarnations of the positions emerged with Canadian Confederation and the British North America Act in 1867, which defined the viceregal offices as the "Lieutenant Governor of the Province acting by and with the Advice the Executive Council thereof.
In 1786, the post of Governor-in-Chief of British North America was created as a central viceregal office overseeing the British colonies of Prince Edward Island, Nova Scotia, New Brunswick, and the Province of Quebec, whose governors then became lieutenant governors, though that of Quebec was occupied simultaneously by the governor-in-chief.
Unlike the federal viceroy, the Canadian lieutenant-governors have been since 1867, if not Canadian-born, at least long-time residents of Canada and not of the peerage, though a number, up until the Nickle Resolution in 1919, were knighted.
While required by the tenets of constitutional monarchy to be nonpartisan during their time in office, lieutenant-governors have frequently been former politicians and some have returned to politics following their viceregal service.
There is no constitutional requirement or consistent practice for the Prime Minister to consult with the province's premier on the appointment of the lieutenant governor.
[33] As the Canadian monarch is shared equally amongst the ten provinces of Canada, as well as the federal realm, and the sovereign lives outside Canada's borders, a lieutenant governors' primary task is to perform the sovereign's constitutional duties on his or her behalf, acting within the principles of parliamentary democracy and responsible government as a guarantor of continuous and stable governance, and as a nonpartisan safeguard against the abuse of power.
[49] Beyond that, the viceroy carries out the other conventional parliamentary duties in the sovereign's stead, including reading the Speech From the Throne and proroguing and dissolving parliament.
[50] If the governor general withholds royal assent, the sovereign may within two years disallow the bill, thereby annulling the law in question.
[48] With most constitutional functions lent to cabinet, a lieutenant governor acts in a primarily ceremonial fashion, carrying out some of the ritual duties normally associated with heads of state and thus symbolizing the sovereignty of the provinces within confederation.
"[55] The lieutenant governor hosts members of the Canadian Royal Family, as well as foreign royalty and heads of state, and is also tasked with fostering national unity and pride.
This travel takes place mostly within a lieutenant governor's province, the viceroys rarely performing state duties anywhere else in Canada, and never internationally, unless it is on behalf of the monarch in a federal capacity;[n 8] it has been argued that the provincial representatives of the King should start to undertake trips to represent their province abroad.
Though the federal viceroy is considered primus inter pares amongst his or her provincial counterparts, the governor general also takes a lower rank to the lieutenant-governors in the provincial spheres; at federal functions, the governor general, as the King's viceregal representative in the country, precedes the lieutenant-governors.
They also upon installation automatically become a Knight or Dame of Justice and a Vice-Prior in Canada of the Most Venerable Order of the Hospital of Saint John of Jerusalem.
[70] To mark a viceroy's presence at any building, ship, airplane, or car in Canada, the relevant lieutenant-governor's flag is employed.
Most provincial viceregal flags consist of a blue field bearing the shield of the province's coat of arms surrounded by ten gold maple leaves[63]—each symbolizing one province—surmounted by a crown.
Various acts in the Canadian constitution and numerous provincial websites typically indicate Lieutenant Governor of [Province] (upper case and no hyphen), likely due to the primacy of those positions in their respective jurisdictions.
[74] The Guide to Canadian English Usage equivocates somewhat, indicating upper case only when used in and associated with a specific provincial lieutenant governor or name (e.g., Lieutenant-Governor Lincoln Alexander), not generally, and varied use.