(225 ILCS 440/4.03) (from Ch. 121, par. 504.03)
    Sec. 4.03. Signs advertising activities conducted on the property on which they are located; which, if along Interstate highways outside a "business area" comply with the following requirements:
    (a) There may not be more than one such sign located more than 50 feet from such activity designed to attract traffic on the Interstate highway proceeding in any one direction;
    (b) No such sign visible to traffic on an Interstate highway and located more than 50 feet from such activity, which displays any trade name referring to or identifying any service rendered or any product sold, used or otherwise handled, may be permitted unless the name of the advertised activity is displayed as conspicuously as such trade name. This restriction does not apply if the trade name identifies or characterizes places for lodging, eating, telephone facilities, vehicle service and repair, or identifies vehicle equipment, parts, accessories, fuels, oils or lubricants being offered for sale at such places;
    (c) No such sign in excess of 20 feet in length, width or height, or 150 square feet in area, including border and trim, but excluding supports, may be erected or maintained more than 50 feet from the activities conducted upon the property where the sign is located;
    (d) The sign must comply with subparagraphs (c), (d), (f) and (g) of Section 4.02;
    (e) No such sign may be erected or maintained which contains, includes, or is illuminated by any flashing, intermittent or moving light or lights except those which may be changed at reasonable intervals by electronic process or by remote control as long as these do not interfere with the effectiveness of an official traffic control device.
(Source: P.A. 81-550.)