La. Stat. tit. 33 § 9033.1
A local governmental subdivision, in Calcasieu Parish only, may issue revenue bonds payable solely from an irrevocable pledge and dedication of up to the full amount of sales tax increments, in an amount to be determined by the local governmental subdivision, to finance or refinance an economic development project or any part thereof or to pay all of or a portion of the costs of an economic development project as specified in R.S. 33:9035.1. A sales tax increment shall consist of that portion of sales tax revenues for any or all taxing authorities, other than the state of Louisiana, collected each year on 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, all as defined in R.S. 47:301 et seq., or any other appropriate provision or provisions of law, as amended, from taxpayers located within an economic development area which exceeds the sales tax revenues that were collected for such taxing authority in the year immediately prior to the year in which the area was designated as an economic development area. Dedication of sales tax increments to pay the revenue bonds shall not impair existing obligations and shall not include tax revenues previously dedicated for a special purpose.
La. R.S. § 33:9033.1