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municipality under its home rule occupation and service occupation tax during the period of July 1, 1990 through September 30, 1990, plus amounts collected by the Department and paid to such municipality through June 30, 1991, excluding the 2 months of highest receipts. The monthly average for each subsequent period of July 1 through June 30 shall be an amount equal to the monthly distribution made to each such municipality under the preceding paragraph during this period, excluding the 2 months of highest receipts. The distribution made in November 1991 and each year thereafter under this paragraph and the preceding paragraph shall be reduced by the amount allocated and disbursed under this paragraph in the preceding period of July 1 through June 30. The Department shall prepare and certify to the Comptroller for disbursement the allocations made in accordance with this paragraph. 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. An ordinance or resolution imposing or discontinuing a tax hereunder or effecting a change in the rate thereof shall be adopted and a certified copy thereof filed with the Department on or before the first day of June, whereupon the Department shall proceed to administer and enforce this Section as of the first day of September next following such adoption and filing. Beginning January 1, 1992, an ordinance or resolution SB3019 Enrolled LRB104 20255 HLH 33706 b Public Act 104-0468