Ga. Const. art. VII, § II, para. IV

Current property tax exemptions preserved. Those types of exemptions from ad valorem taxation provided for by law on June 30, 1983, are hereby continued in effect as statutory law until otherwise provided for by law. Any law which reduces or repeals any homestead exemption in existence on June 30, 1983, or created thereafter must be approved by two-thirds of the members elected to each branch of the General Assembly in a roll-call vote and by a majority of the qualified electors of the state or the affected local taxing jurisdiction voting in a referendum thereon. Any law which reduces or repeals exemptions granted to religious or burial grounds or institutions of purely public charity must be approved by two-thirds of the members elected to each branch of the General Assembly.