After June fifteenth of each year the county treasurer shall, after reserving sufficient of the Resale Property Fund for all encumbrances and sufficient for estimated cost of preparing, publishing, and completing through the ensuing fiscal year all tax-enforcement procedures imposed by law upon the county treasurer, all excess remaining in said resale property fund on such June fifteenth shall be, by the county treasurer, apportioned and credited to the county, and the several cities, towns and school districts therein, and to the several funds thereof, in ratio to the final gross ad valorem taxes for such fiscal year levied in each thereof in accordance with the certificate of the county excise board on the current budget of each thereof, unless the same has been altered by order of the Court of Tax Review or the Supreme Court and then in ratio to the amounts so adjusted. Provided, that, if the board of county commissioners so order by current resolution, in any county, that portion so accruing to all or any of the county's funds shall be credited to the courthouse and jail fund of the county.