La. Stat. tit. 39 § 802
For the purpose of providing municipal services and for the maintenance and operation of municipal service departments, including the acquisition of necessary equipment, for which the levy of a special tax is not herein presently authorized, the municipal authorities of any municipality in this state may levy taxes in excess of the limitations otherwise fixed in the Constitution of Louisiana, not to exceed in any one year ten mills on the dollar of assessed valuation within the municipality, provided such special tax shall not run longer than ten years and the rate, purpose and duration of the tax shall have been first submitted to the voters qualified to vote in the municipality in which the tax is to be levied and, a majority of those voting shall have voted in favor thereof, as provided by existing laws.
La. R.S. § 39:802