805 ILCS 105/107.50: Proxies.

A member entitled to vote may vote in person or, unless the articles of incorporation or bylaws explicitly prohibit, by proxy executed in writing by the member or by that member's duly authorized attorney-in-fact. No proxy shall be valid after 11 months from the date of its execution, unless otherwise provided in the proxy. Unless otherwise prohibited by the articles of incorporation or bylaws, the election of directors, officers, or representatives by members may be conducted by mail, e-mail, or any other electronic means as set forth in subsection (a) of Section 107.10.