7. (a) When at a hearing held upon application of the recipient the court determines from the certification of two physicians, or other acceptable evidence, that the recipient is no longer functionally incapacitated, the court may discharge the representative payee.
(b) Whenever it appears upon application and good cause shown by the representative payee or the welfare board that the representative payee should be relieved of the representative payee's duties, the court may discharge the representative payee and, if the circumstances still require, appoint a replacement for the representative payee.