(1) The Legislature finds and determines that legislation requiring a specific levy or requiring consent of some other governing body to reduce the levy was intended to raise a certain amount of revenue for specific purposes. Upon this determination and notwithstanding the provisions of any statute which requires a definite levy to be made or which requires that a levy may not be reduced except by the consent of some other governing authority, the amount of such levy shall be deemed to be an amount necessary to produce the revenues received in the next preceding year plus, at the option of the taxing authority, an increase not to exceed ten percent (10%) of such revenues.

(2) In any county where there is located a nuclear generating power plant on which a tax is assessed under Section 27-35-309(3), such required levy and revenue produced thereby may be reduced by the levying authority in an amount in proportion to a reduction in the base revenue of any such county from the previous year. Such reduction shall be allowed only if the reduction in base revenue equals or exceeds five percent (5%). “Base revenue” shall mean the revenue received by the county from the ad valorem tax levy plus the revenue received by the county from the tax assessed under Section 27-35-309(3) and authorized to be used for any purposes for which a county is authorized by law to levy an ad valorem tax. For purposes of determining if the reduction equals or exceeds five percent (5%), a levy of millage equal to the prior year’s millage shall be hypothetically applied to the current year’s ad valorem tax base to determine the amount of revenue to be generated from the ad valorem tax levy. For the purposes of this section, the portion of base revenue used to fund the purpose for which a specific levy is required shall be deemed to be the total receipts from ad valorem taxes for such purpose. This paragraph shall apply to taxes levied for the 1987 fiscal year and for each fiscal year thereafter. If the Mississippi Supreme Court or another court finally adjudicates that the tax levied under Section 27-35-309(3) is unconstitutional, then this paragraph shall stand repealed.

(3) With respect to ad valorem taxes levied on or after October 1, 1980, no county or municipality shall levy those mills heretofore required by law to be levied to an extent that such levy shall produce more than the total receipts produced from such levy in the next preceding year, plus, at the option of the taxing authority, an increase not to exceed ten percent (10%) of such receipts. Such total receipts shall be deemed to include the total avails of such levy either collected from the property owner or by reimbursement by the state. The revenues produced from any newly constructed properties or any existing properties added to the tax rolls or any properties previously exempt which were not assessed in the next preceding year may be excluded from the limitation set forth herein.

(4) The ten percent (10%) increase limitation prescribed in this section may be increased by an additional amount by the board of supervisors of any county if the aggregate receipts from all county levies to which this section and Sections 27-39-305 and 27-39-321 apply do not exceed one hundred ten percent (110%) of the aggregate receipts from all such levies during any one (1) of the immediately preceding three (3) fiscal years, as determined by the board of supervisors.

(5) The limitations set forth in this section shall apply to the mandatory tax levied by Section 27-39-329.