205 ILCS 645/21: Reliance on Commissioner.

No foreign banking corporation or other person shall be liable under this Act for any act done or omitted in good faith in conformity with any rule, interpretation, or opinion issued by the Commissioner of Banks and Real Estate, notwithstanding that after the act or omission has occurred, the rule, opinion, or interpretation upon which reliance is placed is amended, rescinded, or determined by judicial or other authority to be invalid for any reason.