O.C.G.A. § 10-1-670

Any provision of this article which would, in the absence of this Code section, impair an obligation of a franchise agreement or any other agreement between a manufacturer or franchisor and a franchisee shall only apply to any such agreement made, entered into, renewed, extended, modified, or continued after the effective date of such provision. Otherwise, each provision of this article shall apply to all franchise or other agreements.