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(e) Nothing in this Section shall be construed to authorize a municipality to impose a tax upon the privilege of engaging in any business which under the Constitution of the United States may not be made the subject of taxation by this State. (f) Except as otherwise provided in this subsection, an ordinance or resolution imposing or discontinuing the tax hereunder or effecting a change in the rate thereof shall either (i) be adopted and a certified copy thereof filed with the Department on or before the first day of April, whereupon the Department shall proceed to administer and enforce this Section as of the first day of July next following the adoption and filing or (ii) be adopted and a certified copy thereof filed with the Department on or before the first day of October, whereupon the Department shall proceed to administer and enforce this Section as of the first day of January next following the adoption and filing. (g) When certifying the amount of a monthly disbursement to a municipality under this Section, the Department shall increase or decrease the amount by an amount necessary to offset any misallocation of previous disbursements. The offset amount shall be the amount erroneously disbursed within the previous 6 months from the time a misallocation is discovered. (h) As used in this Section, "Department" means the Department of Revenue. For purposes of the tax authorized to be imposed under SB3019 Enrolled LRB104 20255 HLH 33706 b Public Act 104-0468