The rear demister though? That one had me scratching my head a little - how is having a fogged rear window an issue?
If I cant have dark tints because of some concerns about visibility then why the hell should people be allowed to drive around with a fogged up window? Cars all have technology to deal with that, if its inoperative and the car is fogged up then its more dangerous than tints which are apparently a huuuuuuuuge safety issue.
So how do you reconcile a courier van / goods vehicle that legally doesn't require an internal rear view mirror? In fact, any passenger vehicle built before 2000 legally only has to have an external mirror on the drivers side.