Levy of Certain Privilege Licence Taxes by Municipalities in Mobile County.

No incorporated municipality in Mobile county shall have power to levy, impose, or collect a privilege license tax upon or in respect of the employees of an employer which is measured by or based on income derived from wages, salaries, commissions, or bonuses, for personal services rendered, unless the levying thereof shall have been authorized before the enactment of such ordinance by a vote of the duly qualified electors of the city or town at an election held for such purpose, in the manner prescribed by the city or town council or commission.