La. Stat. tit. 13 § 5123
The governing body of any governmental unit proposing to issue or which is in the process of issuing bonds or has provided a new or different source of payment for outstanding bonds may bring at any time a proceeding in the district court having original jurisdiction over the matter, and in which such governmental unit is domiciled to establish the validity of such bonds, the legality of the election, if any, authorizing the issuance of such bonds, the validity of the action taken to provide a new source of security for outstanding bonds and all proceedings theretofore taken in connection with the authorization or issuance of such bonds and the validity of the tax, any lease or other means provided for the payment of such bonds, and the validity of all pledges of revenues and of all covenants and provisions which constitute a part of the contract between such governmental unit and the holders of such bonds. Such proceedings shall be brought by filing a motion for judgment describing such bonds and the proceedings had relative to the issuance thereof or the providing of a new or different source of payment therefor and alleging that such bonds when issued will be valid and legal obligations of the issuing governmental unit or that the action taken with respect to providing a new or different source of payment is valid and legal. In such motion for judgment the taxpayers, property owners and citizens of the issuing governmental units, including nonresidents owning property or subject to taxation therein, and all other persons interested in or affected in any way by the issuance of such bonds shall be made parties defendant.
La. R.S. § 13:5123