415 ILCS 5/49

(a) (Blank.) (b) All proceedings respecting acts done before the effective date of this Act shall be determined in accordance with the law and regulations in force at the time such acts occurred. All proceedings instituted for actions taken after the effective date of this Act (July 1, 1970) shall be governed by this Act. (c) (Blank.) (d) (Blank.) (e) Compliance with the rules and regulations promulgated by the Board under this Act shall constitute a prima facie defense to any action, legal, equitable, or criminal, or an administrative proceeding for a violation of this Act, brought by any person.