Adding a new line to an already approved/closed PO

I would like to understand the functionality of JDE E1 9.2, when adding a new change order line to an already existing purchase order with received/closed lines. The setup of P4310 is to route through approvals on critical changes to lines.  When adding a new line to the order should the previous closed/received lines open back up to a 999/105 or 999/230 status, depending on OAR's?  I can not find documentation on this specific scenario other than the entire order amount at the F4301 OTOT level should drive the routing hierarchy.

Thanks

Shawn