The absence of matching attributes in the request context for any of the
attribute designators or attribute selectors that are found in the policy
will result in an enclosing Subject, Resource, Action, or Environment
element to return a value of "Indeterminate", if
the designator or selector has the MustBePresent XML attribute set to
true, as described in Sections 5.37 and 5.42,
and may result in a <Decision> element containing the "Indeterminate" value.
If, in this case, and a
status code is supplied, then the value
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