O.C.G.A. § 34-6-23: Contracts contrary to public policy.

Any provision in a contract between an employer and a labor organization which requires as a condition of employment or continuance of employment that any individual be or remain a member or an affiliate of a labor organization or that any individual pay any fee, assessment, or other sum of money whatsoever to a labor organization is declared to be contrary to the public policy of this state; and any such provision in any such contract heretofore or hereafter made shall be absolutely void.