(a) For each fiscal year, it shall be the duty of the Chief Fiscal Officer of the State to prepare and file quarterly statements setting forth an estimate of the total amount of highway revenues and other state revenues made available by Act 445 of 1973, and all other laws providing state resources for and to county governments for road construction, improvements, and betterments made within the spirit of Act 445 of 1973, for the express use of the several counties of the state and apportioned to the several counties during the then-fiscal year, with the statements to be prepared and filed on or before July 10, October 10, January 10, and April 10 of the fiscal year.
(b) Each statement shall be designated and known as the “Official Estimate of County Highway Revenues Distribution” for the then-current fiscal year, and copies shall be filed with the Chief Fiscal Officer of the State, the Auditor of State, the Treasurer of State, and each of the several county courts.
(c) In addition to the estimate of the total amounts of county road funds by legislated source categories to be collected and apportioned, the Chief Fiscal Officer of the State shall incorporate in each official estimate a listing of all counties and an estimate of the amount of county road funds by legislated source category to be credited to each county under the current provisions of the Revenue Stabilization Law, § 19-5-101 et seq.
(d) In preparing each official estimate of county highway revenues distribution, the Chief Fiscal Officer of the State shall begin with a basic amount arrived at in the manner hereinafter prescribed. To this amount he or she shall add or from this amount he or she shall subtract his or her estimate of such net increase or net decrease in county road funds as may be affected by various factors, as determined by the Chief Fiscal Officer of the State, including, but not limited to, changes in the laws pertaining to tax rates and exemptions, administration of tax laws, and distribution of revenues. The basic amount of county road funds shall be ascertained as follows:
(1) The July estimate shall be the amount of the next-preceding fiscal year's county road funds, increased or decreased by that certain percentage determined by the average of percentage changes in the amount of the total county road funds by legislated source category of each of the three (3) preceding fiscal years in relation to its preceding fiscal year; and
(2) The October, January, and April estimates shall be the total amount of county road funds by legislated source category collected in the preceding months of the then-current fiscal year plus the total amount of county road funds by legislated source category collected in all of the other months of the preceding fiscal year, increased or decreased by that certain percentage determined by the average of percentage changes in the collections during all other months of each of the three (3) preceding fiscal years in relation to the same other months of its preceding fiscal years.