@Petemac2001 Nothing new on that. I don't want to give any new applicants hope that if they get on the Sarawak MM2H that they can live on the Peninsula. To my knowledge there has been no enforcement, but that may merely be because people that applied with that clause in their Letters of Conditional Approval haven't come up for extension or renewal. So we might see some cases in four years. But generally the view is that Sarawak is only interested in the SMM2H visa recipient doing their one month visit/year.
If the Federal authorities decide to crack down I think that they'd have to set up immigration posts for travellers to/from Sarawak. They'd need to know if someone went to Sarawak after entering Peninsula Malaysia, and for those arriving from Sarawak they'd need to have a record of when the entered and how long they stayed in the Peninsula (or left for elsewhere). That would mean checking everyone for documents, even Sarawakians who have never required immigration checks.