Ga. Code § 32-10-90
The authority shall have the power and is authorized, at one time or from time to time, to provide by resolution for the issuance of negotiable revenue bonds of the authority for the purpose of paying all or any part of the cost, as defined in paragraph (4) of Code Section 32-10-60, of any one or a combination of projects. The principal and interest of such revenue bonds shall be payable from and may be secured by a pledge of tolls and other revenues of all or any part of the project financed in whole or in part with the proceeds of such issue or with the proceeds of bonds refunded or to be refunded by such issue or by a pledge of any other revenues of the authority that are legally available for such purpose. The bonds of each issue shall be dated, shall bear interest as provided for in Code Section 32-10-91, shall mature not later than 40 years from the date of issue, shall be payable in such media of payments as to both principal and interest as may be determined by the authority, and may be made redeemable before maturity, at the option of the authority, at such price or prices and under such terms and conditions as may be fixed by the authority in the resolution providing for the issuance of the bonds.
OCGA § 32-10-90