770 ILCS 95/3
The owner of a self-service storage facility and his heirs, executors, administrators, successors, and assigns have a lien upon all personal property located at a self-service storage facility for rent, labor, or other charges, present or future, in relation to the personal property, and for expenses necessary for its preservation, or expenses reasonably incurred in its sale or other disposition pursuant to this Act. The lien provided for in this Section attaches as of the date the personal property is brought to the self-service storage facility and shall be superior to any other lien or security interest except for a statutory lien or security interest which is perfected through filing and has been perfected, prior thereto, through proper filing.
770 ILCS 95/3