Enable Internet Time Page for non-admin user?

Archived from groups: microsoft.public.windowsxp.security_admin (More info?)

This was posted earlier in the XP General discussion, but drew no replies and
more properly belongs here.

I need to allow a specific Limited Account user to change the system clock,
change time zones and, ideally, synchronize with an Internet Time Server on
demand - preferably from the built-in Internet Time tab in the Date and Time
Properties dialog. This system is running Windows XP Pro SP1.

I have successfully enabled the first two, allowing him to set the clock
(add this user to "Change the system time" User Rights Assignment of Local
Security Settings), and change the TZ (give this user write permission for
the HKLM/SYSTEM/CurrentControlSet/Control/TimeZoneInformation registry key).

I cannot, however, figure out how to enable the "Internet Time" page - it's
greyed out for him.

Giving the user the Right to Change the system time allows him to see the
Date and Time Properties dialog and set the clock, but changes to the TZ in
the dialog box had no effect until that registry permission was changed. I
cannot, however, find a way to enable the Internet Time page for him - the
page is there and can be viewed, but it's greyed out from the limited user
account, but is not greyed out (and works) for administrators.

Ideas how to enable the Internet Time page? Is what I've done so far
(especially the registry tweak) the best way to provide these specific
privileges for a specific user? Granting the user elevated privileges
overall is not permissible. We are not allowed to use PD or shareware
utilities, so I'd like to get the built-in Internet Time page working - this
puts all the "time stuff" in the same place, too.

Any help and constructive comments appreciated.