On Sep 1, 2013, at 12:57 AM, Lester Caine <lester@lsces.co.uk> wrote:
Paul Eggert wrote:
Stephen Colebourne wrote:
The Theory change reinstates the one zone per ISO-3166 region requirement. I'm afraid that's incorrect. That change would strengthen the requirement beyond what it ever was, by requiring a Zone to be present for every country. That has never been required and has never been the practice in the tz database.
Since the ISO-3166-1 code table is a reasonably well used base for most geographical activity, at some point timezones are required to match each.
There is no necessarily a single tzdb zone for a given entity that has an ISO 3166 code. (Two immediately obvious counterexamples - the entities with the ISO 3166 codes "US" and "CA".) So do you mean that there do not exist - or, at least, *should* not exist - any tzdb zones that apply to more than one entity with a given ISO 3166 code?