Sun curtains in cars illegal in these conditions: Know to avoid being fined

Curtains or sunscreens or shades seem needed very much when the sun refuses to stop following your window and the UV dances on your skin. However, the use of these shades is illegal. Anything that obstructs visibility is deemed illegal. In 2012, the Supreme Court rolled out a rule which forbids the use of tinted glass and other substitutes that obstruct visibility. Aftermarket glass tinting can invite a police challan.
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.

It has to be noted that tinting in public-owned vehicles is not banned completely and there are but some very simple rules for it. But first, what is tinting on windows? It is simply minimising the transmission of light by blocking the sun’s rays. A lot of cars come with factory tinting on the glasses. But these adhere to the rules in place.
According to the Motor Vehicle Rules 1989, the windows must have a minimum of 50 percent of visual light transmission and the front windscreen and rear glass must have a minimum of 70 percent of visual light transmission. The RTO-approved Dark Green UV cut glass is a possible alternative.
This ban includes sun shades and curtains. The bottom line is anything that obstructs the view from inside of the car and also the view of the inside of the car could land one in trouble with the traffic police.