Nothing in this Act shall prohibit any person who may be engaged by one or more persons, partnerships or corporations, from keeping books, or from making trial balances or statements, or, as an employee, from making audits or preparing reports, provided that the person does not indicate or in any manner imply that the trial balances, statements, or reports have been prepared or examined by a certified public accountant, a registered certified public accountant, or a licensed certified public accountant or that they represent the independent opinion of a certified public accountant or a licensed certified public accountant. Nothing in this Act shall prohibit any person from preparing tax and information returns or from acting as representative or agent at tax inquiries, examinations or proceedings, or from preparing and installing accounting systems, or from reviewing accounts and accounting methods for the purpose of determining the efficiency of accounting methods or appliances, or from studying matters of organization, provided that the person does not indicate or in any manner imply that the reports have been prepared by, or that the representation or accounting work has been performed by a certified public accountant, a registered certified public accountant, or a licensed certified public accountant. Unlicensed accountants are not prohibited from performing any services that they may have performed prior to this Amendatory Act of 1983.