PolicyStatementAttribute
Defines special attribute flags for security policy on code groups.
All = 3
All attribute flags are set.
Exclusive = 1
The exclusive code group flag. When a code group has this flag set, only the permissions associated with that code group are granted to code belonging to the code group. At most, one code group matching a given piece of code can be set as exclusive.
LevelFinal = 2
The flag representing a policy statement that causes lower policy levels to not be evaluated as part of the resolve operation, effectively allowing the policy level to override lower levels.
Nothing = 0
No flags are set.