Any public agency having taxing powers, other than a county or a municipality as herein defined, is authorized to levy a special ad valorem tax not to exceed four (4) mills upon all taxable property within its geographical limits to pay all or a portion of the payments to be made by that public agency under a contract between the public agency and a municipality and if the contract as authorized by the governing body of the public agency so provides, then the contract shall constitute an obligation against the taxing power of the public agency to the extent therein provided. The special ad valorem tax millage authorized by Sections 21-27-161 through 21-27-191 shall not be reimbursable by the state under the provisions otherwise made for reimbursements under the homestead exemption laws.
The proceeds derived from two (2) mills of the levy authorized herein shall be included in the ten percent (10%) increase limitation under Section 27-39-321, and the proceeds derived from any additional millage levied hereunder in excess of two (2) mills shall be excluded from such limitation for the first year of such additional levy and shall be included within such limitation in any year thereafter.