When I was in India, if am being right, I think I remember my friend who is currently studying Canada saying that; he saw multiple entry visa on his international passport. If this is true, please do more research before embarking, especially relating to your national. This being that some passport are stronger than others and might not have the same requirement.Yes the passport gets stamped at the port of entry of course but not prior.
Yes, I thought of this duration minimum term as well though at the moment its strangely missing.