Ga. Code § 20-13-12
It is found, determined, and declared that the creation of the commission and the carrying out of its corporate purposes are in all respects for the benefit of the people of this state and constitute a public purpose and that the commission will be performing an essential governmental function in the exercise of the powers conferred upon it by this chapter. This state warrants and covenants that the commission shall be required to pay no taxes or assessments upon any property owned, acquired, or leased by it or under its jurisdiction, control, possession, or supervision or upon its activities in the operation or maintenance of the buildings, towers, and facilities erected or acquired by it or upon any fees, rentals, or other charges for the use of such buildings, towers, or facilities or upon other income received by the commission. This exemption shall include an exemption from state and local sales and use tax on property purchased by the commission for use exclusively by the commission.
OCGA § 20-13-12