Ga. Comp. R. & Regs. 560-11-2-.54
For the purposes of determining eligibility for increased homestead exemption from all State and county taxes in the amount of $4,000 for certain elderly persons as provided in Article VII, Section I, Paragraph IV of the Constitution, the term "net income" shall not include income received as retirement, survivor or disability benefits under the Federal Social Security Act or under any other public or private retirement, disability or pension system, or any combination of benefits received from the herein named sources, except such income which is in excess of the maximum amount authorized to be paid to an individual and his spouse, on January 1 of the year for which the exemption is sought, under the Federal Social Security Act. Income from such sources, or any combination of such sources, which is in excess of such maximum amount shall be included as net income for the purposes of determining eligibility for the increased homestead exemption.
Ga. Comp. R. & Regs. R. 560-11-2-.54
Ga. Code Ann. Secs. 92-8405, 92-8406, 92-8409, 92-8427.