Per 45 CFR 303.11(b)(17),(18), and (19) Incoming interstate cases should only close with case closure codes
04/1A – the initiating state requests closure
04/1B – the initiating agency no longer needs service
04/13 – incoming interstate non-coop
Due to OSIS programming some intergovernmental cases will close 04/UN. In these cases, at the request of the other state CSS will keep open or reopen these cases.