Need a word!

[Nancy Allison]

I, too, need help with a term. I'm documenting a set of rules. Any rule can
be applied at the organization level, group level, or individual level.
These levels are collectively called "Rule Levels." 
 
In this application, the smaller overrides the larger, so if the No Parking
rule was applied for 90 days to the organization, but the No Parking rule
was also applied to Suzy Smart for 30 days (and Suzy is part of the
organization), for Suzy, the 30-day limit applies, not the 90.
 
What is this called? If it was hardware, I'd call it interrupt levels. But
it's not. 
 
My section is currently called "How Rule Levels Take Precedence," but that
seems both wordy and vague. There surely is a term for this, but I'm
blanking out on it. Thanks for all suggestions.
 
--Nancy