4.I think because there's a huge list of criteria to be
fulfilled for 5 star stadias, or its just that emirates hasn been
accessed by UEFA yet
Criteria for UEFA 5 Star rating
* Minimum capacity of 50,000 (5-star venues) / 30,000 (4-star
venues) individual seats with backrests. (Venues that still have
individual seats without proper backrests will still continue to be
accepted. In the future, however, closer attention will be paid to
this aspect, and which will influence the committees decision
regarding the addition of venues to these list categories.)
* Pitch dimensions of 105 x 68 m. The field of play must be in
pristine condition and be prepared accordingly for a final (quality
of grass, irrigation, smooth surface, etc.).
* Protective fences around the field of play are not acceptable.
Venues which have such installations will not be included on the
list.
* Sufficient room around the field of play for advertising boards
and at least 18 TV cameras. In addition, there must be enough room
between the goals and the first row of spectator seats behind both
goals for a minimum of 150 photographers.
* First-rate dressing-rooms for both teams and the referees (equal
size and furnishings for both teams, spacious, bright and
clean).
* Suitable and appropriately equipped drug-testing room.
* Floodlighting of a minimum intensity of 1,400 lux (eV) in the
direction of the main camera, and of 1,000 Lux (eV) towards the
other areas of the stadium, plus an efficient emergency power
supply able to provide, without interruption, the same luminous
light intensity as the main lighting.
* Modern security installations (access monitoring system, adequate
PA system, etc.).
* A permanent TV surveillance system in colour that is able to
monitor the movement of spectators, as well as their behaviour
inside and outside the stadium. This installation must also be able
to produce still shots of any troublemakers, which can then be
distributed immediately to the security officers / stewards in the
stadium.
* Clear signage that everyone can understand inside and outside the
stadium, as well as in its immediate vicinity.
* Suitable covered seats for disabled spectators and their
accompanying persons (minimum of two sectors with at least 50
places each). The areas for disabled spectators must be adequately
equipped with toilet facilities and a refreshment bar.
* Acceptable sanitary facilities for spectators (both sexes) in
terms of numbers, cleanliness and standards. Toilets without seats
will no longer be accepted for spectators of either sex.
* Provision of first-rate media facilities in terms of camera
positions, working places, TV studios, etc., in accordance with the
UEFA Guidelines for Media Facilities.
* Adequate first-class facilities must be provided for VIPs,
including a minimum of 150 places in the Honorary Tribune VIP
box.
* International airport(s) able to cope with the huge extra demands
of a UEFA final (capacity for up to 60 charter flights per day in
addition to the normal, scheduled flights)
* Adequate hotel accommodation. For UEFA and its partners, at least
1,000 five-star hotel rooms (UEFA Champions League) / 500 rooms
(UEFA Cup) are needed. In addition, enough other hotel
accommodation in all types of category must be available.
http://en.wikipedia.org/wiki/UEFA_Stadia_List
