Ga. Code § 12-3-338
Bonds of the authority shall be confirmed and validated in accordance with the procedure of Article 3 of Chapter 82 of Title 36. The petition for validation shall also make party defendant to such action any authority, division, subdivision, instrumentality, or agency of the State of Georgia which, or any person who, has contracted with the Lake Lanier Islands Development Authority for the use of any building, structure, or facilities for which bonds have been issued and sought to be validated. Such authority, division, subdivision, instrumentality, agency, or person shall be required to show cause, if any, why such contract or contracts and the terms and conditions thereof should not be inquired into by the court, the validity of the terms thereof determined, and the contract adjudicated as security for the payment of any such bonds of the authority. The bonds when validated and the judgment of validation shall be final and conclusive with respect to such bonds and against the authority issuing the same and against any authority, division, subdivision, instrumentality, department, agency, or person contracting with the authority.
OCGA § 12-3-338