The provisions of R.S. 9:3502-9:3506 shall apply only to conventional obligations bearing simple interest from date on the unpaid balance and shall not apply to or affect precomputed interest or discount loans; nor shall it affect the enforceability or collectibility of notes or obligations as provided in R.S. 9:3500. Notwithstanding the twelve percent simple interest rate limitations under R.S. 9:3503, the provisions of R.S. 9:3504 and 3505 shall apply to federally related mortgage loans subject to 12 U.S.C. § 1735f-5 that bear simple interest at rates in excess of twelve percent per annum.
La. R.S. § 9:3506