You must apply for an exemption letter from the Utah Highway Patrol, explaining the health benefits of window tint. In most cases, you will need to fill out a vehicle tint-waiver request form — or some form along those lines — depending on where you reside.A person may not operate a motor vehicle with any sign, poster, or other nontransparent material on the windshield or side windows of the motor vehicle. To qualify, you'll need a doctor's recommendation and a Utah highway patrol exemption letter. Reasons to Tint Your Windows. That means Utahns can now have darker car windows. After several unsuccessful tries, Utah's window tinting law is about to change. There are no medical exceptions available for special window tinting in Utah. Conclusion.