Georgia Code Title 48. Revenue and Taxation § 48-5-345

(b) Each year the commissioner shall determine if the overall assessment ratio for each county, as computed by the state auditor under paragraph (8) of subsection (b) of Code Section 48-5-274, deviates substantially from the proper assessment ratio as provided in Code Section 48-5-7, and if such deviation exists, the commissioner shall assess against the county governing authority additional state tax in an amount equal to the difference between the amount the state's levy, as prescribed in Code Section 48-5-8, would have produced if the digest had been at the proper assessment ratio and the amount the digest that is actually used for collection purposes will produce. The commissioner shall notify the county governing authority annually of the amount so assessed and this amount shall be due and payable not later than five days after all appeals have been exhausted or the time for appeal has expired or the final date for payment of taxes in the county, whichever comes latest, and shall bear interest at the rate specified in Code Section 48-2-40 from the due date.

(c) Beginning with tax digests on or after January 1, 2016, no county shall be subject to the assessment authorized by subparagraph (b) of this Code section.