La. R.S. 48:1303.4

Notwithstanding any provision of law to the contrary which limits ad valorem tax millage which may be imposed, the governing authority of any road lighting district of a parish that has adopted a charter for local self-government or other home rule charter may levy special ad valorem tax millage in excess thereof, provided such levy is not inconsistent with the parish charter or the Constitution of Louisiana, for a period not to exceed ten years, if the question of levying such tax is approved by the favorable vote of a majority of the electors of the district voting in an election called for that purpose.