In any referendum under this Act, voting shall be by ballot cast by eligible voters in such manner, as determined by the Director, that will make it easy to vote throughout the State. Any producer who is qualified under the corn marketing program is entitled to one vote. The referendum area includes the entire State of Illinois.
     Reasonable publicity and notification of the referendum date and voting locations shall be provided in trade publications, the public press and the official state newspaper, at least 2 weeks prior to such referendum date.