I can't give you any examples, but it can happen.
What I'm getting at, in response to your question, is that if Canada was ever in need of a standard and didn't have the resources to develop it but regional or international resources were available, Canada could adopt that standard. A technical committee would be formed to study the standard and could make any changes or adjustments it saw fit. Statistics-wise, the vast majority of international or regional standards used in Canada are adopted as is.