215 ILCS 165/13

No subscription certificate shall be issued by any health services plan corporation until the form thereof has been filed with and approved by the Director, together with all applications, riders and endorsements for use in connection with the issuance or renewal thereof. It shall be the duty of the Director of Insurance to withhold approval of any contract form filed with him if it violates any provisions of this Act, or if it violates or is contrary to any provisions of Sections 143, 355, and 355a of the "Illinois Insurance Code", approved June 29, 1937, as amended, which are not inconsistent or in conflict with provisions of this Act.