Here is an official Australia government web link to confirm that Norfolk Island will change the country’s Standard Variation
from +1130 to +1100:
"The Norfolk Island Standard Time Ordinance 2015 sets the Standard Time for Norfolk Island from Co-ordinated Universal Time (UTC) +11.5 to UTC +11. "
https://www.comlaw.gov.au/Details/F2015L01483/Explanatory%20Statement/Text

Norfolk Island Standard Time Ordinance 2015 - F2015L01483
Ordinance No. 6 , 2015
Issued by the authority of the Assistant Minister for Infrastructure and Regional Development
Norfolk Island Act 1979
Norfolk Island Standard Time Ordinance 2015
Norfolk Island Continued Laws Amendment (Standard Time) Ordinance 2015

The Norfolk Island Continued Laws Amendment (Standard Time) Ordinance 2015 amends the Norfolk Island Continued Laws Amendment Ordinance 2015 to repeal the Standard Time and
Daylight Saving Act 1974 (NI); the previous time setting enactment for Norfolk Island.
This Ordinance amends the title of the Norfolk Island Continued Laws Amendment Ordinance 2015 to Norfolk Island Continued Laws Ordinance 2015 to better match naming conventions.

The Ordinances provide benefits for the local business community by aligning Norfolk Island with its major trading and tourism markets on the east coast of Australia.
UTC +11.5 is a unique time zone and the change to UTC +11 resolves technical issues with electronic equipment experienced by people living on Norfolk Island.
The UTC +11 is also a more geographically appropriate time zone for Norfolk Island.

It seems that time zone change will take place at 12.30 am (by legal time in New South Wales) on 4 October 2015.

Alexander Krivenyshev,
http://www.worldtimezone.com

On 9/23/2015 7:00 PM, "" wrote:

Another case of pacific island madness:-

IATA has been advised that Norfolk Island will change the country’s Standard Variation
from +1130 to +1100. The new Standard Variation will be effective as of 4 October 2015
at 0200 local time.

(Imposed by the govt in Canbara on that other little Island).