225 ILCS 410/3C-1
"Nail technician" means any person who for compensation manicures, pedicures, or decorates nails, applies artificial applications by hand or with mechanical or electrical apparatus or appliances, or in any way beautifies the nails or the skin of the hands or feet including massaging the hands, arms, elbows, feet, lower legs, and knees of another person for other than the treatment of medical disorders.
However, nail technicians are prohibited from using techniques, products, and practices intended to affect the living layers of the skin. The term nail technician includes rendering advice on what is cosmetically appealing, but no person licensed under this Act shall render advice on what is appropriate medical treatment for diseases of the nails or skin.
"Nail technician teacher" means an individual licensed by the Department to provide instruction in the theory and practice of nail technology to students in an approved nail technology school.
225 ILCS 410/3C-1