Type/Source for --REASND in Define-XML

The EDC being used collects --REASND at the event, form, or item level (Intentionally Left Blank and ILB REason are properties of event, form, and item EDC levels). The field is present in EDC extracts, but it is not represented on the rendered CRF. It is standard to annotate the CRF with --STAT=NOT DONE when --TESTCD=--ALL, but what about annotating --REASND if not present on the rendered CRF page? Is it acceptable to annotate as "--REASND when --ORRES=null" and use typical Type=Collected / Source=Investigator with the PDFPageRef of the annotation text?  Type=Assigned seems inappropriate since the Source is Investigator.