La. R.S. 33:3530

The governing authority of the municipality issuing the certificates, may, by resolution, authorize the chief executive officer, and the clerk or secretary, to negotiate and deliver the paving certificates and collect the purchase price therefor and do any and all things necessary and incidental thereto, or authorize delivery to the contractor of all or any of the certificates in payment of their contractual obligation covering the improvements. The funds derived from the sale of the paving certificates shall be expended solely in payment of the costs of the improvements, and shall not be drawn upon for any other purpose.