Notwithstanding any other provision of law to the contrary, a child housed at a residential home, transitional placing program, or in foster care may stay at such home, transitional placing program, or in foster care until his twenty-first birthday while participating in the extended foster care program set forth in R.S. 46:288.1 et seq., or any other program offered by the residential home.
La. R.S. § 46:1403.1