English to Russian Bus/Financial Business/Commerce (general)

Политика компании в отношении автопарка
Опросник для проверки знаний
...
As a new hire, you received an available car from the fleet, but it is not a new vehicle. When can you order a new vehicle?
o You can place a new order 6-9 months prior to the current vehicle contract end date.
o Return the car and order a new one once your probation period is over.
(When answered correctly)
New company cars may not be ordered as long as there is an available car to re-allocate at the appropriate grade level.

Не совсем понимаю смысл фразы "to re-allocate at the appropriate grade level".

Спасибо.