O.C.G.A. § 20-2-462

All counties in which a local tax is now or may hereafter be levied for school purposes throughout the entire county or throughout the entire county except that part embraced within the incorporated limits of a municipality or municipalities are authorized to refund, refinance, or retire outstanding schoolhouse bonds of such territory in the same manner and under the same rules and regulations as provided in Code Sections 20-2-451 through 20-2-455, except that in elections for such territory, the manner of holding elections shall be as provided in Code Sections 20-2-463 through 20-2-466.