РЕГЛАМЕНТ (ЕС) N 261/2004 ЕВРОПЕЙСКОГО ПАРЛАМЕНТА И СОВЕТА ОБ УСТАНОВЛЕНИИ ОБЩИХ ПРАВИЛ В ОБЛАСТИ КОМПЕНСАЦИИ И СОДЕЙСТВИЯ ПАССАЖИРАМ В СЛУЧАЕ ОТКАЗА В ПОСАДКЕ, ОТМЕНЫ ИЛИ ДЛИТЕЛЬНОЙ ЗАДЕРЖКИ АВИАРЕЙСА И ОБ ОТМЕНЕ РЕГЛАМЕНТА (ЕЭС) N 295/91. Регламент. Европейский Союз. 11.02.04 261/2004

Article 4
                           Denied boarding

     1.  When  an  operating  air  carrier  reasonably expects to deny
boarding  on a flight, it shall first call for volunteers to surrender
their  reservations  in  exchange  for benefits under conditions to be
agreed  between the passenger concerned and the operating air carrier.
Volunteers  shall  be  assisted  in  accordance  with  Article 8, such
assistance   being  additional  to  the  benefits  mentioned  in  this
paragraph.
     2. If an insufficient number of volunteers comes forward to allow
the  remaining  passengers  with reservations to board the flight, the
operating  air  carrier  may  then deny boarding to passengers against
their will.
     3.  If  boarding  is denied to passengers against their will, the
operating  air carrier shall immediately compensate them in accordance
with Article 7 and assist them in accordance with Articles 8 and 9.