Ha! Ha! Keep your eyes open and you will come across many cars especially Land Cruisers where the front windshield has been tinted. As a person who has been driving for so many years now, it makes me ask myself two important questions:
1. How do the drivers of such vehicles manage to see clearly through a tinted windshield especially after sunset? I would be facing much difficulty in driving such cars.
2. What are such vehicle owners trying to hide from the eyes of the common public on the streets?
As for your query, yes they are legal if one has obtained the necessary permission from the Traffic Police.