It would have been good to have the OLT usage policy topic kept open. Not in order to (just) find fault but to continue the process of clarification and local consultation. No doubt given the constraints of time, money, experience those working on such projects can't be expected to have a view much broader than their job description.
I'm thinking that signs/ clarification of the rules is a good thing, much better than just control by frowning or making things up to suit. Rules to be bent or worked around has been mentioned. I'd prefer nothing left to interps (or alternatively a 'rule' hasn't passed the test).
So.. usage policy, combined with this particular sign (at PV turn off):
Those doing the Ducane Circuit can't go up via Ducane Gap... Unless.. they can make it up there and off track in a day, not using Windy Ridge Hut. Is this too far for a 'short' day walk? Is the Ducane Circuit more dangerous given that the more difficult section will be a few days away (weatherwise)? I haven't seen the other signage yet, these are just a couple of quick ponderings that came immediately to mind..