Florida Statutes Title XXIII. Motor Vehicles § 316.2954. Windows behind the driver;  restrictions on sunscreening material

(a) Sunscreening material consisting of film which, when applied to and tested on the rear window glass of the specific motor vehicle, has a total solar reflectance of visible light of not more than 35 percent as measured on the nonfilm side and a light transmittance of at least 15 percent in the visible light range;  however, sunscreening material which, when applied to and tested on the rear window glass of the specific motor vehicle, has a total solar reflectance of visible light of not more than 35 percent as measured on the nonfilm side and a light transmittance of at least 6 percent in the visible light range may be used on multipurpose passenger vehicles.

(b) Perforated sunscreening material which, when tested in conjunction with existing glazing or film material, has a total reflectance of visible light of not more than 35 percent and a light transmittance of no less than 30 percent.  For those products or materials having different levels of reflectance, the highest reflectance from the product or material will be measured by dividing the area into 16 equal sections and averaging the overall reflectance.  The measured reflectance of any of those sections may not exceed 50 percent.

(c) Louvered materials, if the installation of the materials does not reduce driver visibility by more than 50 percent.

(d) Privacy drapes, curtains and blinds, provided such covering is in an open and secure position when the motor vehicle is being operated on any public highway, road, or street.