Section 100(2) in The Central Motor Vehicles Rules, 1989
(2)[ The glass of the windscreen and rear window of every motor vehicle shall be such and shall be maintained in such a condition that the visual transmission of light is not less than 70%. The glasses used for side windows are such and shall be maintained in such condition that the visual transmission of light is not less than 50%,and shall conform to Indian Standards [IS : 2553 Part 21992] [Sub-Rule(2) Substituted by GSR 338(E), dated 26.3.1993 (w.e.f. 26.3.1993).] ;]
