Nothing contained in this Chapter shall be construed to prohibit the employment by a certified public accountant or by any person, firm, copartnership, association, or corporation permitted to engage in the practice of public accounting in the State of North Carolina, of persons who have not received certificates of qualification admitting them to practice as certified public accountants, as assistant accountants or clerks: Provided, that such employees work under the control and supervision of certified public accountants and do not certify to anyone the accuracy or verification of audits or statements; and provided further, that such employees do not hold themselves out as engaged in the practice of public accounting.