Questions about driving licence (one word with doubt)

Good Sunday to you, I have unfortunately found no area that is set up for my question, maybe it can be postponed, should I have missed something. Now go! We have there someone who got his driving license 1999 because of a crime and that for 11 months, after that he had to make a new application because more than 6 months withdrawn. Now this person got the well-known card and, although under 50, has been laid on, every 5 years an eye- I was always of the opinion that this applies from 50. It is about the truck classes. Do you have ideas? Greetings anne marie