21 Del. C. § 6403: Unlawful devices.

No person shall advertise for sale, sell, use or install or cause to be installed, any device which causes an odometer to register any mileage other than the true mileage traveled by a motor vehicle. For purposes of this section, the true mileage traveled by a motor vehicle is that mileage traveled by a motor vehicle as registered by the odometer within the manufacturer’s designed tolerance.