Window tinting is regulated at both the Federal and State levels. Federal regulations require 70% of light to pass through the front windows (rear is not regulated federally). Maryland State regulations, however, apply to all vehicle windows, and require at least 35% light transmittance. Window tints are often cited as cause for a traffic stop, such as in State v. Williams, in which the traffic stop led to CDS charges. It is important to know your rights regarding window tinting – Call Azari Law at 301.362.3300 to evaluate your traffic case today.