The objects and purposes for which appropriations are made are classified and standardized by items as follows:
When an appropriation is made to an officer, department, institution, board, commission or other agency, or to a private association or corporation, in one or more of the items above specified, such appropriation shall be construed in accordance with the definitions and limitations specified in this Act, unless the appropriation act otherwise provides.
An appropriation for a purpose other than one specified and defined in this Act may be made only as an additional, separate and distinct item, specifically stating the object and purpose thereof.
30 ILCS 105/13