"It is certified that this bond is authorized by and is issued in conformity with the requirements of the constitution and statutes of this state."
Such recital shall be deemed to be an authorized declaration of the governing authority and to import that there is legal authority for issuing the bonds and imposing the sales taxes; that all the proceedings therefor are regular; that all acts, conditions and things required to exist, happen and be performed precedent to and in the issuance of the bonds and imposition of the tax have existed, have happened and have been performed in due time, form and manner as required by law; that the amount of the bonds, together with all other indebtedness of the parish does not exceed any limit or limits prescribed by the constitution or statutes of this state; and that all required notices have been duly and regularly given by publication in the manner required by law. If any bonds are issued containing the above recital the same shall be construed according to the import herein declared, and it shall be conclusively presumed that the recital is true, and neither the governing authority nor any taxpayer shall be permitted to question the validity or regularity of the bonds, obligations or sales taxes in any court or in any action or proceeding.
"Incontestable. Secured by pledge and dedication of proceeds of sales taxes levied by the Parish of _______________, State of Louisiana. Registered this _____ day of ______________, 20___.
__________________________
Secretary of State"
La. Revenue and Taxation § 47:338.102