revoking syscat access from DBADM authority

hello everybody,

i am having db2 9.7 on aix 6.1 and would liek to do following:
I have a user with DBADM rights and want to remove access (select insert update delete) to the syscatalog tables. I have tried revoking dbadm privilege and explicitely revoking dataaacess and accessctrl. After that I regranted dbadm without dataaccess and without accessctrl, but I assume dbadm always has the ability to access those tables right? Is there any other way or is it even possible? the dbadm needs to be kept on that user.

thank you

homes