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.
(..) I hope you locate the trouble, monsieur. Madame, it is my business to locate trouble. No trouble back there. If you require anything- Monsieur, all I require is a phone, my little bag of tools, and some privacy in which to work. That is all I require. (..)1975 The Return of the Pink Panther