Rules for DT0

When writing rules against the DT0 section of a form ie. AP52.3, do I only need to apply the rule to the object type FLD or do should I also apply the rule to the object type HDN.  The problem is when I run a UserSecurityReport in one of my test data areas the Object Info column reports the line as HDN - DT0, In my other test data area it reports it as HDN -AP52.3, when I am expecting it to report as HDN - AP52.3,AMI-AU-GROUP like it shows it in the security class.