Are there rules to default a Sub Inventory when creating Internal Requisition in iProc with Destinat

My client has multiple inventory orgs with multiple subinventories. The internal requisition with destination type expense is selecting the correct inventory org in iProcurement however I need the system to select the subinventory based on rules. The standard functionality looks for the subinventory with the greatest on hand qty. I need mechanism to default a sub inventory based on the employee's location.    My question can one use the PROCEDURE CUSTOM_DEFAULT_REQ_LINE  package to default in the source subinventory base on logic ?