In addition to any taxes now authorized or that may hereafter be authorized by the constitution and laws of the State of Alabama, pursuant to Amendment No. 373 to the Constitution of Alabama of 1901, the Cherokee County Commission is hereby authorized to increase the countywide ad valorem school tax presently being levied by 10 mills on each one hundred dollars ($100) worth of taxable property in Cherokee County. Such 10 mill increase in ad valorem tax shall be levied and collected by the governing body of Cherokee County for each year beginning with the levy for the tax year October 1, 1989, to September 30, 1990 (the tax for which year will be due and payable October 1, 1990) and ending with the levy for the tax year October 1, 2008, to September 30, 2009 (the tax for which year will be due and payable October 1, 2009) for public school purposes with the proceeds from such increase to be expended at the direction of the county school board; provided, that the aforesaid increased 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 Cherokee County, and voted for by a majority of those voting at a special election that shall be held on May 30, 1989, to be called and held in accordance with the law governing special elections.