La. R.S. 39:1456

The debt limitation for general obligation bonds issued by any political subdivision in order to advance refund its outstanding debt obligations is hereby established at an amount not greater than one hundred ten percent of the debt limitation otherwise established by law, provided that the term of the debt refunded shall not be extended and the principal and interest payments on the refunding bonds is less in each calendar year than the principal and interest in such calendar year on the outstanding debt being refunded.