What I heard was back in mid 2010 CASA really was serious about implementing the mandatory use of Flight sims (if one was in the country only). The ball was rolling, it was about to happen.....but, then a few industry heavy weights (who I don't have any idea who they are) used their influence to stop the implementation of this plan. I believe cost was one reason given. I have also heard that CASA are still serious about implementing the mandatory use of sims so I don't believe the idea has entirely disappeared. I hope it is made mandatory one day, maybe we just have to wait a little longer for the effected organisations to fully digest the concept. Who knows.