One of the main criteria is that they have independent auditors which check the whole production chain, from the farmer and the mill, via the trader, to the fuel supplier who delivers petrol or diesel to the filling station.
Üks peamisi kriteeriume on sõltumatute audiitorite kaasamine, kes kontrollivad kogu tootmisahelat talupidajast ja veskist alates vahendaja kaudu kütusetarnijani, kes viib bensiini või diisli bensiinijaama.