(a) The provisions of this Act are cumulative of each other and of any other provision of law of this state in effect relating to the same subject. Among other things, the provisions of this Act preserve the constitutional and common law authority of the attorney general to bring actions under state and federal law.
(b) If any of the provisions of this Act are held invalid, the remainder shall not be affected as a result; nor shall the application of the provision held invalid to persons or circumstances other than those as to which it is held invalid be affected as a result.