Ala. Code § 41-4-94
To the end that all expenses of the state may be brought and kept within the budget, the budget appropriation bills shall contain a specific sum or sums as an emergency appropriation or appropriations. Such sum shall not, however, exceed two percent of the total amount appropriated by such bill. The manner of allotment of such emergency appropriation shall be as follows: Any department, board, bureau, commission, agency, office or institution of the state or any person or persons in charge of any activity in which the state is interested, desiring an allotment out of such appropriation, shall present such request in writing to the Department of Finance with such information as it may require, and, such request shall be handled and allotments may be made pursuant thereto as in the case of regular allotments. Such allotments shall be made only for any purpose authorized by law for which no specific appropriation has been made or for which inadvertently an insufficient appropriation has been made.
Ala. Code § 41-4-94 (1975)