65 ILCS 5/11-103-17

The Airport Tax provided for by Section 11-103-16 shall not be levied and collected until the question of its adoption and the maximum rate at which such tax shall be levied is certified by the clerk and submitted to a vote of the voters of the municipalities and has received the affirmative vote of a majority of the voters voting upon the question. The question of such airport tax shall not be submitted to the voters of any municipality more often than once in any 46 month period.