Ich habe dies im FIFA Rulebook gefunden: "Field Surface
Matches may be played on natural or artificial surfaces, according to
the rules of the competition. The colour of artificial surfaces must be green.
Where artificial surfaces are used in either competition matches
between representative teams of member associations affi liated to
FIFA or international club competition matches, the surface must meet
the requirements of the FIFA Quality Concept for Artificial Turf or
the International Artifi cialTurf Standard, unless special dispensation
is given by FIFA."
Ich schließe daraus, dass man in doch verwenden darf........wie auch immer.