Complex sentence: The ECJ argued that indistinctly applicable measures that favored domestic traders over importers were not necessarily in breach of Article 34 TFEU; they could be justified if they satisfied mandatory requirements: that the measure is necessary for protecting the public or the consumer.
Split into simpler sentences: The ECJ argued that indistinctly applicable measures that favored domestic traders over importers were not necessarily in breach of Article 34 TFEU. They could be justified if they satisfied mandatory requirements: that the measure is necessary for protecting the public or the consumer.