CFIA is missing in action.

Olive oil, like sausages, can contain all sorts of adulterants and different oils.  The only ones that have assured purity are the very expensive ones where you can trace the actual estate where it was produced.

Since a lot of olive oil comes from Italy the retailers simply slap an "imported from Italy" label on it leading people to assume that the olives and the production of the oil took place there.

Mislabeling of seafood is also rampant along with many other consumables.