105 ILCS 5/17-2B
In counties having a population in excess of 600,000 and less than 2,000,000 inhabitants, the school board of an elementary school district maintaining only grades kindergarten through 8 and having an enrollment of less than 800 students may, by proper resolution, cause a proposition to transfer moneys accumulated in its operations and maintenance fund to its educational fund to be submitted to the voters of the school district at a regular scheduled election held in accordance with Article 9 and the general election law of the State; provided, however, that no such resolution, referendum or transfer shall be adopted, held or approved pursuant to this Section unless at the time such resolution is adopted by the school board: (i) the school district has no bonded indebtedness outstanding, has in excess of $1,000,000 accumulated in its operations and maintenance fund and has in each of the 16 years preceding adoption of the resolution levied taxes for both educational purposes and for operations and maintenance purposes at the maximum rates from time to time permitted by law to be levied by such district; and (ii) the voters of the district have not at any time previously by referendum approved or refused to approve the transfer of any moneys from the operations and maintenance fund to the educational purposes fund.
If a majority of the votes cast on the proposition at a referendum authorized by this Section is in favor of the proposition, the school board may thereafter transfer the moneys from the operations and maintenance fund to the educational fund as approved by the voters of the school district.
105 ILCS 5/17-2B