Notwithstanding § 7-52-307, in the event any tax equivalent distribution provisions of any private act, home rule or metropolitan government charter direct that the tax equivalent amount to be distributed to each taxing district is to be an amount arrived at by applying the current ad valorem tax rate in that district to the depreciated original cost of the electric system's tangible property, including materials and supplies, used or usable in electric operations in that district, such distribution provisions, which are subject to § 7-52-304(5), shall continue in effect until such time as § 7-52-304(5) ceases to be applicable, and shall then be repealed. Thereafter, in the absence of any contract as provided in § 7-52-306, the municipality shall allocate the total tax equivalent paid for each fiscal year, to each taxing jurisdiction, in proportion to the ratio of:
T.C.A. § 7-52-309