La. R.S. 39:703

If the election results in favor of the proposition to levy and assess special taxes upon the property subject to taxation in the subdivision, the governing authority shall, after the promulgation of the result of the election and pursuant to the terms of the proposition submitted, levy and assess the special taxes on the property; provided that the total rate of taxation so imposed shall not exceed the constitutional limit, nor shall the tax run for a greater number of years than the number named in the proposition submitted, nor be imposed for any other purpose than that named in the proposition.