O.C.G.A. § 38-2-276

Officers and enlisted personnel of the organized militia shall be exempt from street tax and, while serving on ordered active duty, from jury duty, any local or special laws to the contrary notwithstanding. The commanding officer of each or any force of the organized militia shall furnish each member of his command applying for the same such certificate of membership as may be prescribed by the adjutant general, signed by the commanding officer, which certificate shall be accepted by any court as proof of exemption as provided by this Code section. The certificate shall be good only for 30 days after which it bears date.