(805 ILCS 10/3.1) (from Ch. 32, par. 415-3.1)
    Sec. 3.1. "Ancillary personnel" means such persons acting in their customary capacities, employed by those rendering a professional service who:
        (1) are not licensed to engage in the category of
professional service for which a professional corporation was formed; and
        (2) work at the direction or under the supervision of
those who are so licensed; and
        (3) do not hold themselves out to the public
generally as being authorized to engage in the practice of the profession for which the corporation is licensed; and
        (4) are not prohibited by the regulating authority,
regulating the category of professional service rendered by the corporation from being so employed and includes clerks, secretaries, technicians and other assistants who are not usually and ordinarily considered by custom and practice to be rendering the professional services for which the corporation was formed.
(Source: P.A. 99-227, eff. 8-3-15; 100-201, eff. 8-18-17.)