If someone has been diagnosed with Lupus (A condition requiring
diligent protection from the sun) Can that person legally tint his or
Dave, Lupus is one of the limited number of covered Medical conditions under Illinois Law allowing the person to have tinted windows. The details are covered in ILCS 5/12-503.
However, a quick overview: The owner must obtain a certified statement or letter from a physician licensed in Illinois. This must be submitted to the Secretary of State. Most recently, the SOS has begun issuing special "WT" plates to persons with an exemption to the tint law. This allows law enforcement officials to be aware that there is an exemption, without having to stop the vehicle and ask for the Doctor's certification. Check with your local Illinois Secretary of State's Office for full information on how to apply.