Louisiana constitution
Article 6
Section 33

(B) Full Faith and Credit. The full faith and credit of a political subdivision is hereby pledged to the payment of general obligation bonds issued by it under this constitution or the statute or proceedings pursuant to which they are issued. The governing authority of the issuing political subdivision shall levy and collect or cause to be levied and collected on all taxable property in the political subdivision ad valorem taxes sufficient to pay principal and interest and redemption premiums, if any, on such bonds as they mature.