Some regions like Delhi and Chandigarh also ran a road safety drive some years ago when cars were pulled over for the removal of illegal tinting on windows. Some VIP cars are allowed black tinting due to security reasons, but that is governed by specific policies.

from Times of India https://timesofindia.indiatimes.com/auto/advice-centre/sun-curtains-in-cars-illegal-in-these-conditions-know-to-avoid-being-fined/articleshow/93816456.cms