I was going to say this could just be because the Canadian government is slow to adopt things. The Canadian flag wasn't officially adopted until 1965 and the national anthem wasnt official until 1980.
But the case was about a person defending themselves from a drunk boating charge by saying a canoe doesn't count as a "vessel". It sounds similar to drunk people riding horses being charged with DUI. Courts have ruled horses count as vehicles and you need to be sober to ride one.