This is bizarre but maybe I see the reason why. If it's to restrain foreign ownership of rental properties, I don't think it's going to have much impact. Renters who want to live there bad enough will pay it, and I would not be surprised if some foreign owners will help with that process.
On the other page.. If foreign landlords are suspected of not paying their full taxes, this is one way to increase a guarantee that the taxes will be paid.