We have had a particular problem with EK flights filing incremental requested flight levels for each waypoint of their flight until at their cruising level. This means that we get the level requested between RANBI and BALUS passed to us from Duabi APP which is automatically the level we then pass to Bahrain. This level may be FL220 even though their requested cruising level is FL360. Due to the congestion through this area by the time EK gets up to FL220 and requests higher, all the level above may already have been assigned to other dpeartures/overflights, which means due to this way of flightplanning they have missed out on a higher level.
Therefore if that is what the question is referring to, the UAE ACC doesn't want to know the levels the aircraft will be crossing at intermediate waypoints (ie. The requested flight levels) but instead we want to know the requested cruising level of the aircraft so that we can coordinate that to Bahrain and book that level for the aircraft.
I hope that makes sense and helps.