Ala. Const. art. XIV, § 269.01

The several counties in the state shall have power to levy and collect a special county tax not exceeding thirty cents on each one hundred dollars worth of taxable property in such counties in addition to that now authorized or that may hereafter be authorized for public school purposes, and in addition to that now authorized under section 260 of article XIV of the Constitution; provided, that the rate of such tax, the time it is to continue and the purpose thereof shall have been first submitted to the vote of the qualified electors of the county, and voted for by a majority of those voting at such election.