“Local public entity” includes a county, township, municipality, municipal corporation, school district, school board, educational service region, regional board of school trustees, trustees of schools of townships, treasurers of schools of townships, community college district, community college board, forest preserve district, park district, fire protection district, sanitary district, museum district, emergency telephone system board, and all other local governmental bodies. “Local public entity” also includes library systems and any intergovernmental agency or similar entity formed pursuant to the Constitution of the State of Illinois or the Intergovernmental Cooperation Act as well as any not-for-profit corporation organized for the purpose of conducting public business. It does not include the State or any office, officer, department, division, bureau, board, commission, university or similar agency of the State.
     The changes made by this amendatory Act of the 94th General Assembly do not apply to an action or proceeding accruing on or before its effective date.