La. R.S. 33:4282

In order to obtain funds to construct, maintain, rehabilitate, extend, enlarge, or improve the municipally owned public utility the governing authority of the municipality may issue negotiable certificates of indebtedness and secure their payment by a pledge of the revenues and franchises of the revenue producing public utility, provided that the governing authority is first authorized to do so by a majority of the qualified resident electors of the municipality voting in an election to be held in the manner provided below.