In both Arizona and New York, tinting headlights and taillights is illegal. Arizona law specifically prohibits the tinting of taillights or headlights. The law includes details on the permissible visible light transmission (VLT) percentages for various windows and vehicles but does not allow any tinting for headlights and taillights. Similarly, in New York, changing the color or light level of a vehicle's light fixtures, which includes headlights, tail lights, and brake lights, is unlawful. This regulation aims to ensure safety on the roads by maintaining clear visibility of vehicles' lighting systems.