La. Stat. tit. 39 § 1466
The proceeds of the sale of any refunding bonds shall be deposited, applied, and disbursed in accordance with the provisions of the resolution authorizing the issuance of the refunding bonds. Any earnings on the investment of the refunding bond proceeds may be used for the purpose of paying the principal, interest, and premium, if any, on the refunded bonds, and any balance after the complete retirement of the refunded bonds, as to principal, interest, and premium, if any, shall be placed in the Bond Security and Redemption Fund. The state treasurer may execute such documents and instruments as may be necessary to comply with the provisions of the resolution authorizing the issuance of the refunding bonds or to comply with applicable laws and regulations.
La. R.S. § 39:1466