La. R.S. 39:784

If a majority in number and amount of assessed value of the property taxpayers of the parish, ward or municipality entitled to vote under the provisions of the constitution of 1921 and the laws of this state, vote in favor of each levy of the special tax, the governing authority on behalf of the parish, or ward therein, or the municipal authorities for and on behalf of the municipality, shall immediately pass the ordinance levying the tax for such time as may have been specified in the ordinance ordering the election, and shall designate the years in which the taxes shall be levied and collected.