Main cameras must be positioned exactly in line with the halfway line, facing away from the setting sun. They must be positioned at a height above the pitch that guarantees an optimum and unobstructed view of the entire field of play and its immediate vicinity and, in principle, when focusing on the centre spot on the pitch, be at an angle of 12 to 15-degrees relative to the horizontal plane. Positions must be provided for at least three cameras on a platform at least six metres in length for the play-offs and league phase matches, and for at least four cameras on a platform at least eight metres in length for matches in the knockout phase.