La. R.S. 33:1395.2

The calling of an election on a proposed charter once it has been completed by the charter commission is mandatory. The governing authority of the municipality or parish to which the proposed charter is submitted shall call an election to adopt or reject the charter on the next date allowed under the provisions of R.S. 18:402 for a primary or general election, special election, or bond, tax, or other election but not earlier than sixty days after its publication.