Ala. Code § 31-2-11
Owing to liability to call for military duty during their term of service, every officer and enlisted man of the National Guard, Naval Militia and Alabama State Guard when activated in lieu of the National Guard, shall be exempt from state jury duty during his active membership, any local or special laws to the contrary notwithstanding. The commanding officer of any unit shall furnish each member of his unit applying for same such certificate of membership as may be prescribed by the Adjutant General, signed by such commanding officer, which certificate shall be accepted by any court as proof of exemption as provided by this section. Such certificate shall be effective for the calendar year in which it is issued or until such member is discharged or separated, whichever is sooner.
Ala. Code § 31-2-11 (1975)