I think, for the moment, we have reached some kind of stable resting point: certainly in Australia we are very satisfied with the performance of this framework.
We regard this system as having reached an advanced stage of evolution, with the formal exchange of letters between the Treasurer and the Governor in 1996, endorsing the framework which had then been in existence for some years. It can no doubt be tweaked in various operational ways, but we would regard these as minor modifications, rather than full upgrades.