Ala. Code § 45-22-130.16

The county engineer shall make written requisitions to the chair of the county governing body for all materials, machinery, equipment, and necessary supplies needed for the construction, maintenance, and repair of the public roads, bridges, and ferries of Cullman County. The requisitions shall be filed and presented to the chair of the county governing body at its next meeting for the approval of the governing body. Provided, however, that the chair shall have full power and authority to make purchases without first obtaining the approval of the whole commission if the delay caused by the hereinabove procedure, might, in his or her judgment, cause an unnecessary and harmful interruption in the operation of the county road system.