This is probably related to the protection feature discussed on this list a 
while ago.

At 04:54 PM 22/10/2002 +1000, you wrote:
> > That's EPP speak for "the client (Registrar) has has locked the domain".
>
>Okay.
>
>Under what circumstances can a Registrar 'lock' a domain?
>
>If the Registrar of Record (Registrar A) 'locks' a domain, and the
>Registrant takes their domain name business to another Registrar (Registrar
>B), can Registrar B then make changes to the domain name details such as
>re-delegation?
>
>
>Regards, Mark
>
>Mark Hughes
>Effective Business Applications Pty Ltd
>+61 4 1374 3959
>www.pplications.com.au
>effectivebusiness§pplications.com.au
>
>
>-----Original Message-----
>From: Matt Narayan [mailto:Matt.Narayan§melbourneit.com.au]
>Sent: Tuesday, 22 October 2002 4:44 PM
>To: 'effectivebusiness§pplications.com.au'
>Subject: RE: [DNS] Reseller hyperlinks on AUDA site
>
>
>
> >BTW, can someone provide a definitive answer on what the following 'Status'
> >means when it shows up in the AusRegistry whois search:
> >
> >Status:  clientUpdateProhibited  (e.g. see blackboard.com.au)
>
>That's EPP speak for "the client (Registrar) has has locked the domain".
>serverUpdateProhibited means that the server (Registry) has locked the
>domin.
>
> >Status:  inactive (e.g. see crystals.com.au)
>
>That means that the domain has yet to be delegated.
>
>
>
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Kind regards,

Lucian Kafka
www.conexim.com.au