What are the two types of authorization that a client could provide for a paralegal

What are the two types of authorization that a client could provide for a paralegal to disclose their confidential information on their legal matter? In your answer provide an example of how a paralegal would recognize each of these types of client authorization.
Authority: Text pp. 137-38; Paralegal Rules of Conduct Rule 3.03(1)(a), Paralegal Professional Conduct Guidelines Guideline 8