(70 ILCS 5/13.1) (from Ch. 15 1/2, par. 68.13a)
    Sec. 13.1. In any Authority in which there has been established a maximum annual tax rate which is less than the maximum rate otherwise applicable by the terms of Section 13, the Board may, by ordinance or resolution duly adopted, cause to be submitted to the legal voters of the Authority a proposition to increase such maximum tax rate to a rate not exceeding the specific maximum rate set forth in Section 13 by certifying proposition and the ordinance or resolution to the proper election officials, who shall submit the proposition to the voters at an election in accordance with the general election law. In addition to the requirements of the general election law, notice of the submission of such proposition at any election shall be given in the manner prescribed in Section 14.5. The proposition shall be in substantially the following form:
    Shall the maximum general
tax rate of the.... Airport             YES
Authority be increased from          -------------------------
....% to....% of full, fair             NO
cash value?
    If a majority of the legal voters of the Authority voting upon such proposition vote in favor thereof, the Board may thereafter levy a tax not to exceed the rate so authorized.
    The limits of the tax rate and the authority to levy as set in this Section do not include the rate of or authority to levy taxes required for lease payments to any Public Building Commission. The tax rate necessary and the authority to levy taxes for such lease payments are in addition to such limits and are without limitation as to rate or amount.
(Source: P.A. 81-1489.)