Use of dark, black or reflective glasses in vehicles is not permitted as per law. As provided in Rule 100 of Central Motor Vehicle Rules 1989, the glass of the windscreen and rear window of motor vehicles should have a visibility of at least 70% and that of side windows, a minimum visibility of 50%. The specification of glass should conform to Indian Standards [IS: 2553 - Part 2 - 1992]. The front windscreen should be of laminated safety glass, whose pieces do not fly in the event of a crash and edges less jagged than in case of ordinary glass..