Patron groups include both library patrons and status patrons (pseudopatrons) used by staff.
Patron group is one of three factors that determine loan period - the other two are CLIO location and Item Type. CLIO patron records have only one active patron group assigned; other inactive patron groups may be present.
All groups also have corresponding group "XXX-blocked" for when borrowing privileges are suspended. Privileges can be suspended for fines in excess of $100, an overdue recall, or it may be manually set.