(a) General rule.--A professional corporation may lawfully render professional services only through officers, employees or agents who are licensed persons. The corporation may employ persons not so licensed but those persons shall not render any professional services rendered or to be rendered by it.
(b) Supporting staff.--This section shall not be interpreted to preclude the use of clerks, secretaries, nurses, administrators, bookkeepers, technicians and other assistants or paraprofessionals who are not usually and ordinarily considered by law, custom and practice to be rendering the professional service or services for which the professional corporation was incorporated nor to preclude the use of any other person who performs all his employment under the direct supervision and control of a licensed person. A person shall not, under the guise of employment, render professional services unless duly licensed or admitted to practice as required by law.
(c) Charges.--Notwithstanding any other provision of law, a professional corporation may charge for the professional services of its officers, employees and agents, may collect those charges and may compensate those who render the professional services.