What does an ignition interlock device require from a driver?

An ignition interlock device is designed to prevent a driver from operating a vehicle while under the influence of alcohol. The correct requirement is that the driver must breathe into the device before starting the car. This breath test measures the driver’s blood alcohol concentration. If the device detects alcohol above a predetermined threshold, the vehicle will not start. This precaution helps to ensure that only sober drivers are able to operate the vehicle, providing an important safety measure in preventing DUI incidents.

The other requirements, while relevant to the context of driving and legal regulations, do not define the primary function of the ignition interlock device. For example, having a valid driver's license is necessary for legal driving but does not pertain specifically to the interlock device itself. Similarly, while there may be fees associated with the installation of the device or conditions for monitoring, those aspects are administrative and do not reflect the core functionality of the device in terms of alcohol detection and prevention.