Board has established procedures for stockholders to communicate with the Board. A stockholder may contact the Board by writing to the chairman of the Corporate Responsibility & Governance Committee or the other non-management members of the Board attention at the company's principal executive offices at 111 South Wacker Drive, Chicago, Illinois 60606. Communications received in writing are distributed to the chairman of the Corporate Responsibility & Governance Committee or the Board unless in the reasonable judgment of the company's secretary they are considered inappropriate for submission in accordance with standards approved by the company's independent directors.