The Canadian Heraldic Authority is part of the office of the Governor General which has the power to grant armourial bearings in Canada. source
The Governor General of Canada (French [masculine]: Gouverneur général du Canada, or [feminine]: Gouverneure générale du Canada) is the federal viceregal representative of the Canadian monarch, Queen Elizabeth II. As the sovereign is shared equally with 15 other independent countries in a form of personal union, as well as with the ten other jurisdictions of Canada, and resides predominantly in her oldest realm, the United Kingdom, she, on the advice of her Canadian prime minister only, appoints the governor general to carry out most of her constitutional and ceremonial duties for an unfixed period of time—known as serving at Her Majesty’s pleasure—though five years is the normal convention. Also traditional is a rotation between anglophone and francophone incumbents. Once in office, the governor general maintains direct contact with the Queen, wherever she may be at the time. source
Addendum: Canadian Wongs get their own crest I could not find a web site when I posted this article and I cannot find one now. They do have an address and a phone number: Wong Kung Har Wun Sun Association, 303 Spadina Ave, Toronto, ON M5T 2E6, Canada, 416) 977-3426. Gordon Wong is the chairman. Just make sure you have the right Chinese character. There are two common surnames for “Wong”: Yellow (now with the above crest), and King. Make sure you are the right Wong and not the wrong Wong.