Under the Azerbaijani rules on applying coverings to vehicle glass, what tinting film may lawfully be fitted to a passenger car's windscreen and front door windows?

1. Any film, provided the glass still transmits at least 75 per cent of light.
2. Film on the windscreen only down to the level of the factory sun visors — or, where the car has none, no more than 15 cm deep — and no film at all on the front door windows.
3. Film anywhere on the car, as long as both exterior rear-view mirrors are fitted.
4. No film anywhere on the vehicle, including the rear window.