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subsection 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, if all other requirements of this subsection are met, shall proceed to administer and enforce this subsection 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, if all other conditions of this subsection are met, the Department shall proceed to administer and enforce this subsection as of the first day of January next following the adoption and filing. The Department of Revenue shall not administer or enforce an ordinance imposing, discontinuing, or changing the rate of the tax under this subsection, until the municipality also provides, in the manner prescribed by the Department, the boundaries of the business district in such a way that the Department can determine by its address whether a business is located in the business district. The municipality must provide this boundary and address information to the Department on or before April 1 for administration and enforcement of the tax under this subsection by the Department beginning on the following July 1 and on or before October 1 for administration and enforcement of the tax under this subsection by the Department beginning on the following January 1. The Department of Revenue shall not administer or SB3019 Enrolled LRB104 20255 HLH 33706 b Public Act 104-0468