Overført til vareudvekslingen ville dette betyde, at f.eks. Renault kun måtte eksportere sine biler Tyskland, hvis de i Tyskland kom til at koste det samme som en Volkswagen.
Were this to apply to the movement of goods, it would mean, for example, that Renault would be allowed to export its cars to Germany only if they were, once there, to cost no more or less than a Volkswagen.