The very high cost of inducting pilots to airlines and type rating them on complex aeroplanes will guarantee that they will find a way to move pilots from RHS to LHS when they need them. Any hours requirements will be massaged to fit the requirements on the day. CASA will go along for the ride, because if they don't they will lose 'business' and will be seen to be out of step with the rest of the world.
ICUS, P1/S, command practice - call it what you like. In my day it was called 'ticketted training' and was just a fancy name for the F/O filing the flight plan then flying the sector from takeoff to touchdown without the guy in the left seat having to grab the controls. The only caveat was that the Captain had to put in a progress report saying warm and fuzzy things about command potential blah blah.
It's been done in Europe and in Asia for the last 40 years and it will be done here - but only when they need to; not because they are in a generous frame of mind. Do the beancounters care a rat's about prior command experience? Of course not. Experience is nothing to them. It is only the cost of the type rating and any other training that they care about. So if you are young, and have only 10 hours of multi PIC, don't worry about your command prospects - just get into that jet RHS. The command will follow in due course.