Ala. Code § 31-2-131

In order to facilitate the execution of the purposes of this chapter and the necessary movements of troops and property, the Adjutant General shall have the authority to use a cash fund, not to exceed $2,000, to be advanced to an officer of the State Military Department designated by the Adjutant General to be maintained and used as a revolving fund out of which expenses authorized by this chapter may be paid, the revolving fund to be advanced out of the regular military appropriation provided in Section 31-2-132, and to be reimbursed from time to time out of the fund against which the expenditure is properly chargeable, upon presentation to the Comptroller of Accounts, of receipts and vouchers with orders attached, approved by the Governor, showing the legal expenditure of the amount sought to be reimbursed.