La. Const. art. VI, § 37

(A) Authorization. The legislature by law may authorize political subdivisions to issue bonds or other debt obligations to construct, acquire, extend, or improve any revenue-producing public utility or work of public improvement. The bonds or other debt obligations may be secured by mortgage on the lands, buildings, machinery, and equipment or by the pledge of the income and revenues of the public utility or work of public improvement. They shall not be a charge upon the other income and revenues of the political subdivision. (B) Exception. This Section shall not apply to a school board. PART III.