The owner must obtain a certified statement or letter written by a physician licensed to practice medicine in Illinois that such person owning and operating or being transported in a motor vehicle is afflicted with or suffers from such disease, including, but not limited to, systemic or discoid lupus erythematosus, disseminated superficial actinic porokeratosis, light sensitivity as a result of a traumatic brain injury, or albinism. However, no exemption from the requirements of subsection (a-5) shall be granted for any condition for which protection from the direct rays of the sun can be adequately obtained by the use of sunglasses or other eye protective devices.
Such certification must be carried in the motor vehicle at all times. The certification shall be legible and shall contain the date of issuance, the name, address, and signature of the attending physician, and the name, address, and medical condition of the person requiring exemption. The information on the certificate for a window treatment must remain current and shall be renewed every 4 years by the attending physician. The owner shall also submit a copy of the certification to the Secretary of State. The Secretary of State may forward notice of certification to law enforcement agencies.
625 ILCS 5/12-503