Technically speaking, there aren't any federal laws that mention how you can't drive a car once the airbags have been deployed. In other words, it's perfectly legal to keep on driving a car, despite having its airbags deployed. As long as, following the collision, you ascertain that your car is in a driveable condition. And, that its most important systems - engine, transmission, brakes, tires, etc. - are functional. Regardless, driving a car once the airbags have been deployed is still a bad idea. It's simply because, at that point, your car no longer has airbags to protect you and other occupants in the event that another collision occurs.