Georgia Code Title 36. Local Government § 36-82-256

Any contract which has been duly authorized and executed by a local governmental entity before May 2, 2005, shall not be rendered invalid or improper by the provisions of this article; provided, however, that this article shall apply to any renewal of such a contract after May 2, 2005, unless the contract permitted the renewal and set the terms of the renewal contract before January 1, 2005, in which case this article shall not apply to any such renewals.