The Legislature, for purposes of Section 217(f) of the Alabama Constitution and upon adoption of the proposal of the taxing authority, in order to provide for the preservation, renewal and continuation of the total rate of existing ad valorem school district taxation in Sub-District G-1, approves the adjustment of the existing rate of the subject school district tax of 5.1 mills by 8.8 mills to the uniform adjusted rate of 13.9 mills in Sub-District G-1 effective simultaneously with the reduction of 8.8 mills of ad valorem school district taxation in said Sub-District G-1 (by expiration of a separate ad valorem school tax therein) and for any school tax year for which the levy of the subject school district tax at that uniform adjusted rate shall be approved in the manner then provided by law; subject to the favorable majority vote in compliance with Section 217(f) of the Alabama Constitution.