How to prevent Red Hat major version updates.

Hi.

I am using RHEL 6.1 Server for ppc64.  I am also using a Red Hat Satellite server for server managment.

I have specific software that will not work on RHEL 6.2.

Is there anyway to set my systems where they cannot be updated to 6.2 inadvertently?

Let's say a system admin inavertently tried to run the update from 6.1 to 6.2.  Is there a way to refuse or deny this update?

Minor kernel updates to 6.1 is okay, but I don't want major updates (i.e. 6.2, 6.3) and other software packages I still want to be able to get.

thanks