35 ILCS 510/3

(1) All privilege tax decals herein provided for shall be transferable from one device to another device. Any such transfer from one device to another shall be reported to the Department of Revenue on forms prescribed by such Department. All privilege tax decals issued hereunder shall expire on July 31 following issuance. (2) All privilege tax decals must be securely affixed to the device. A decal that is attached to a device behind a transparent plate or covering that is screwed, bolted, or otherwise securely fastened to the device is deemed to be securely affixed for the purposes of this Section.