La. Const. art. VI, § 22

When an election is required in a political subdivision under the provisions of this constitution which require submission to the electors of a proposition or question, the election shall be called, conducted, and the returns thereof canvassed, in accordance with the procedures established by the law then in effect pertaining to elections for incurring bonded indebtedness and special taxes relative to local finance, or as may be otherwise provided by law.