35 ILCS 636/5-15: Maximum rates.

(a) For municipalities with a population of less than 500,000, the tax authorized by this Act may be imposed at a rate not to exceed 6% of the gross charge for telecommunications purchased at retail. If imposed, the tax must be in increments of 0.25%.

(b) For municipalities with a population of 500,000 or more, the tax authorized by this Act may be imposed at a rate not to exceed 7% of the gross charge for telecommunications purchased at retail. If imposed, the tax must be in increments of 0.25%.