IMHO, this means also, that due to High and Low Speed Stabilization (where the aircraft gives inputs to the flight controls to prevent stalling it [and therefore, spin it]) and also to the fact that AoA data is provided to BUSS - Back Up Speed tape, via the IR part of the ADIRU, in order to enter a stall the aircraft would have to have changed to Direct Law.
Are you sure the aircraft has to be in Direct Law to stall. My undrestanding of the alt law low speed stabilisation term is that it only introduces a modest nose down term to resist inadvertent stalling but that there was no absolute alpha protection as there is in Normal Law.