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.
(..) dodging every obstacle! They're penetrating the bureaucracy! - Did I do something illegal? - No. - We shouldn't help our customers? - The law requires that I answer no. - We're supposed to help people. - Help our people! Starting with our stockholders. Who's helping them out, huh? (..)2004 The Incredibles