The truck driver carries a special license, as the law 'requires' (him to do). = The truck driver carries a special license, 'as required by' law.
What will be 'required' of me if I accept the job? = What will I be 'required' to do if I accept the job?
The newspaper is 'required reading' [=reading that must be done] in my politics course.
(..) He had this crazy idea about breeding pine trees. This is... This is heavy-duty, Doc. This is great. Does it run on regular unleaded gasoline? Unfortunately, no. It requires something with a little more kick. Plutonium. Plutonium. Wait a minute. Are you telling me that this sucker is nuclear? (..)1985 Back to the Future