Jam stab if ELAC doesn't detect it then there will be no ECAM actions and aircraft will remain in normal law. In that case QRH procedure will be applied. The manual trim remains available and if not then elevator holds it's position, so it's not necessary to lower gear at Vapp. But when ELAC detects Jam stab aircraft will go in Alternate law and appear on ECAM. If stab trim is not available the ECAM will ask gear to be lowered at Vapp.