Section 45 ILCS 165/15 - Powers(a) Any power or powers, privileges, or authority exercised or capable of exercise by a public agency of this State may be exercised and enjoyed jointly with the Mid-America Port Commission according to the powers delegated to the commission pursuant to this Act.(b) A public agency of this State may enter into a letter of understanding with the Commission to advance the purposes of the Commission.(c) The Mid-America Port Commission shall exercise no control over the operation of port districts established by any other law of this State, except by voluntary agreement between the port district and the Commission. P.A. 91-566, eff. 8/14/1999.