If transports have already been imported into a system but they need to be moved back in the transport path to enforce a Re-Approval or Re-Import this can be done using the Add to Control Point option. This will move the transports from their current location to the selected location in the transport path.
Transports can only be added or moved to control points that precede the current location in the current transport path.
To do this highlight the required transports, right click and choose the Add to Control Point option. Then select the required system control point: