70 ILCS 5/20: Partial invalidity.

If any provision of this Act, or the application of any provision thereof to any property, person or circumstance, is held to be invalid, such provision as to such property, person or circumstance shall be deemed to be excised from this Act, and the invalidity thereof as to such property, person or circumstance shall not affect any of the other provisions of this Act or the application of such provision to property, persons or circumstances other than those as to which it is invalid, and this Act shall be applied and shall be effective in every situation so far as its constitutionality extends.