Alas, …Asia/Urumqi does actually remain in error on OlsonDB despite the aspirations of the local population AND official (local) policy (not that I am in any way advocating a role on the list for legal authorities!) TZdata only tracks the time most (Han) Chinese use in Xinjiang, although they themselves would never consider that time as 'local time'.
-mld

On Oct 20, 2011, at 6:10 PM, Kevin Kenny wrote:

 As soon as you try to qualify 'legal
authorities,' you'll reopen many cans of worms. The PRC will almost
certainly attempt to assert authority over Asia/Taipei, and *will*
report Asia/Urumqi as an error (the local ethnic minority sets their
clocks differently from what the government proclaims; the tzdata
tracks both).