75 ILCS 5/5-7
No city, village, township or incorporated town is authorized to levy the tax provided for in this Article unless it first adopts an ordinance, or resolution in the case of a township authorizing the levy of such tax, certifies to the proper election officials the proposition for the approval of such tax and such election officials submit the proposition to the voters of such city, village, township or incorporated town, as the case may be, at a regular election and such proposition is approved by a majority of such voters voting upon the question; the proposition shall state the tax, and the purpose thereof as established by the ordinance or resolution. However, in any city, village, township or incorporated town in which a majority of the voters voting upon the question have, subsequent to January 1, 1969, approved any such ordinance or resolution providing for the issuance of bonds pursuant to Section 5-2 of this Act at a coupon rate of less than 7% per annum, the corporate authorities of any such city, village, township or incorporated town are authorized to, and may, before January 1, 1972, issue such bonds, or any part thereof, so approved at a coupon rate that does not exceed 7% per annum and such corporate authorities are authorized to adopt an ordinance or resolution authorizing the levy of the tax provided for in this Article without submitting such ordinance or resolution to the voters of such city, village, township or incorporated town for approval.
75 ILCS 5/5-7