(A) Any person may operate a motor vehicle with front sidewing vents or windows located immediately to the left and right of the driver that have a sun-screening device, in conjunction with safety glazing material, that has a light transmission of 35% or more plus or minus 3% and a luminous reflectance of 35% or less plus or minus 3%. Except as provided in division (C) of this section, any sun-screening device applied to front sidewing vents or windows located immediately to the left and right of the driver in excess of the requirements of this section shall be prohibited without a permit pursuant to a physician’s prescription as described below. A permit to operate a motor vehicle with front sidewing vents or windows located immediately to the left and right of the driver that have a sun-screening device, in conjunction with safety glazing material, which permits less light transmission and luminous reflectance than allowed under the requirements of this section, may be issued by the Department of Public Safety to a person having a serious medical condition which requires the use of a sun-screening device if the permittee’s physician prescribes its use. The Director of the Department of Public Safety shall promulgate rules and regulations for the issuance of the permit. The permit shall allow operation of the vehicle by any titleholder or relative within the second degree by consanguinity or affinity, which shall mean a spouse, each grandparent, parent, brother, sister, niece, nephew, aunt, uncle, child, and grandchild of a person, who resides in the household, except as provided in division (B).
(B) This section shall not prohibit labels, stickers, decalcomania, or informational signs on motor vehicles or the application of tinted or solar screening material to recreational vehicles as defined in section RSMo. § 700.010, provided that such material does not interfere with the driver’s normal view of the road. This section shall not prohibit factory-installed tinted glass, the equivalent replacement thereof or tinting material applied to the upper portion of the motor vehicle’s windshield which is normally tinted by the manufacturer of motor vehicle safety glass.
(C) Any vehicle licensed with a historical license plate shall be exempt from the requirements of this section.
Penalty, see § 10.99