65 ILCS 5/11-33-1
The corporate authorities of each municipality may require the registration of electrical contractors, and may impose an annual registration fee of $25 on each registered contractor. An electrical contractor who is registered in one municipality, however, shall not be required by any other municipality to be registered or to pay a registration fee in the other municipality.
The term "electrical contractor," as used in this section, means any person engaged in the business of installing or altering by contract electrical equipment for the utilization of electricity for light, heat, or power. But the term "electrical contractor" shall not include the installing or altering of (1) radio apparatus or equipment for wireless reception of sounds and signals, or (2) apparatus, conductors, or other equipment installed for or by public utilities, including common carriers, which are under the jurisdiction of the Illinois Commerce Commission, for use in their operation as public utilities. Nor shall the term include the employees employed by an electrical contractor to do or supervise his work.
65 ILCS 5/11-33-1