Ala. Code § 31-2-39

No officer or member of the armed forces of the state shall incur any expenses whatsoever to be paid by the state, except such expenses as are authorized in this chapter, without first obtaining the consent of the Governor or of the Adjutant General; provided that in extreme emergencies, the commanding officer of any unit of the armed forces of the state in the active military or naval service of the state or undergoing field training may hire, rent, or make purchases of such necessities as are absolutely required for the immediate use and care of his command in the execution of such training or of the mission for which he is in the active military or naval service of the state. A report of such action, containing a statement of the articles hired, rented, or purchased, the price thereof and the necessity therefor, shall be immediately forwarded through channels to the Adjutant General of the state, who shall forward such statement to the Governor with his recommendations and, if approved, it shall be paid out of the proper fund as if it had been purchased or contracted in the proper manner.