La. Revenue and Taxation § 47:338.99
The additional sales tax so levied shall be imposed by an ordinance of the governing authority of said parish and shall be levied upon the sale at retail, the use, the lease or rental, the consumption and storage for use or consumption of tangible personal property and on sales of services in the parish, all as presently defined in R.S. 47:301 through 317; provided, however, that the ordinance imposing said tax shall be adopted by said governing authority only after the proposition to authorize the imposition of the tax shall have been submitted to the qualified electors of the parish at an election to be conducted in accordance with the general election laws of the State of Louisiana, and the majority of those voting in said election shall have voted in favor of the proposition. In addition, the said proposition may also include provisions authorizing the funding of the additional sales tax into bonds in the manner set forth therein, subject to the limitations hereinafter set forth. The proposition approved at the election shall constitute a full and complete dedication of the avails or proceeds of said tax and its provisions shall control the expenditure thereof. In the event the tax is so voted, the governing authority shall have complete authority to levy and collect the tax within such parish and to provide for all procedural details necessary in the imposition, collection and enforcement thereof. All reasonable and necessary costs and expenses of administration and collection of the tax shall be paid from the additional sales tax revenues.
La. Revenue and Taxation § 47:338.99