At the said CPWG call, I also mentioned that SubPro WG deliberations on Name Collisions were only due to begin at its (then) next call which was on 12 Sep 20:00 UTC after which I would attempt to provide CPWG with a further update on this topic.
As it turned out, SubPro WG did start its deliberations on the topic but not sufficiently deeply to facilitate a useful revised update on my part. Therefore, I will defer any attempt to provide one until next week.
Justine Chew-----