How/where do you set permissions for the Database option for Enumerated Lists [RTC 4.0]

In 4.0 I see the option to store an Enumeration in the Database rather than the 
process specification.  This lets me give someone permission to update (or at least extend) 
an enumerated list without having to give them rights to update the Process Spec.
Sounds like an excellent advancement.  

Looking for information and where/how to set these permissions.  
There is blurb in the InfoCenter (below), but I haven't found additional help. 

From CLM4.0 InfoCenter:
Note: When you define a new enumeration,you can store it in the process 
specification or the database. If you store the enumeration in the database, 
you can add new values to the enumeration directly from the work item editor, even if you
do not have permissions to modify the process specification. You still
require permissions to add new values.