Arizona law dictates specific parameters for aftermarket window film application on vehicles. These regulations primarily address visible light transmittance (VLT), which refers to the percentage of light that can pass through the tinted window. The established standards vary depending on the specific window and vehicle type, ensuring driver visibility and road safety. For instance, front side windows typically require a higher VLT than rear windows.
Compliance with these regulations is crucial to avoid potential legal consequences, including fines and the requirement to remove non-compliant window film. Adhering to the prescribed VLT levels contributes to safer driving conditions by maintaining adequate visibility, especially during nighttime or adverse weather. Historically, these standards have been refined to balance the benefits of window tinting, such as heat reduction and UV protection, with the need for unobstructed vision.