Classes of driving licences for cross-sectional paralysis

I hope that some people here can help me with the following problem. A friend of mine has contracted a spinal cord squeezing in an accident at work. The following are more or less equivalent to a spinal cord injury. Fortunately, there are feelings and some reflexes in the left leg again. But now it is the case that according to Tüv and driving licence, when the driver’s license is tested and changed to a driving licence, the driving licence is changed to a driving licence. In the present situation, he cannot drive a truck or a motor vehicle without question and he would not do so either. On request from the competent authorities, it was only that he was allowed to “make” his driving licences again after a recovery. Has anyone ever successfully resisted this approach? or has one of you proposed a useful way of removing the vehicle’s driving licence? Is it possible to avoid driving licences and still get his registrations for a handheld operating device? After all, the new purchase is at quite high costs. I already thank you for your efforts. Greeting Thomas