Having a bit of a discussion elsewhere about the lack of a life jacket demo on AC Jazz on flights between YVR and YYJ (at least in my experience).

I thought it was wierd, because in spite of the short hop, the plane could make a soft landing on water, where life jackets would be required.

Others made the point that life jackets aren't required if the plane is not going beyond 20km of land (I think that was the distance), so none on board and no demo.

Does anyone know if YYJ/YVR flights on AC Jazz actually have life jackets on board?

If yes, why no demo? What's the downside?

If no, I guess that plane is prohibited from going X km from land?