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 373 to the Constitution of Alabama of 1901, an increase of the ad valorem tax presently being levied in the City of Hoover, Alabama, pursuant to the general provisions of the constitution and laws of the State of Alabama from the rate of sixty-five cents on each one hundred dollars worth of taxable property in the city to the rate of two dollars and five cents on each one hundred dollars worth of taxable property in the city (an increase of one dollar and forty cents on each one hundred dollars worth of taxable property, or 14 mills) is approved; such additional 14 mill tax to be levied and collected for each year beginning with the levy for the tax year October 1, 1989, to September 30, 1990, (the tax for which year shall be due and payable October 1, 1990), and ending with the levy for the tax year October 1, 2016, to September 30, 2017, (the tax for which year shall be due and payable October 1, 2017), and to be used by the city Board of Education of the City of Hoover for public school purposes; provided, that the aforesaid increase 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 city, and voted for by a majority of those voting at a special election called and held in accordance with the law governing special elections.