Ala. Code § 14-7-19

In order to carry out the provisions of this chapter, the Legislature shall authorize in its annual appropriations an Industrial Revolving Fund and set the amount therein for the use of the Board of Corrections. The board is authorized to expend such moneys out of appropriations for said revolving fund as may be necessary to erect buildings, improve existing facilities, purchase equipment, procure tools, supplies and materials, purchase, install or replace equipment and otherwise defray the necessary expenses incident to the employment of prisoners as provided in this chapter.