765 ILCS 905/1
Any mortgage heretofore or hereafter executed by a public utility (as defined in Section 3-105 of The Public Utilities Act), or by any corporation that may own or operate, within the State, any plant, equipment or property that shall be used for or in connection with the conveyance of oil or gas by pipe line, in the manner provided for the execution of mortgages upon real estate, may include both real and personal property; and any mortgage heretofore or hereafter executed by such public utility or such oil or gas pipe line corporation upon its real and personal property shall constitute a valid lien upon all and every part of the property of the mortgagor which is described in such mortgage and which is situated in any county in this State where such mortgage is or shall be recorded in the manner provided for the recording of real estate mortgages, and such mortgages shall be governed by the provisions hereinafter stated for mortgages of real property.
765 ILCS 905/1