Region subtags and orthographic variants

[Yury]

On 04/15/2015 01:57 PM, Peter Constable wrote:
...
> I get the impression that you two are in violent agreement.

I get the impression I'm systematically not 'heard', either.
Maybe it's some deficiency of my English (non-native).
So I'm quitting this topic, as I have no more potentially useful input 
on it.

Question: is there a form/procedure for renaming the registry tag? Is it 
just remove+register?

-Yury