FD33 Customer Credit Managment Internal Data fields - can these be required

For the Customer Maser Credit screens, in this case the "Status" screen which shows the sections "Internal Data" and "External Data", is there anyway to mark any of these fields as "Required"? They currently are all optional. I've tried to find these screens via OBD2 but they only contain the Customer Master fields; not the Credit Control master fields. Particularly I'm looking to make the fields "Last internal review" and "Next internal review" as manatory fields. Any ideas?