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.
Indistinctly applicable measures were not necessarily in breach of Article 34 TFEU. This was what the ECJ argued. These Indistinctly applicable measures favored domestic traders over importers. The measure is necessary for protecting the public. The measure is necessary for protecting the consumer. They could be justified: this. They satisfied mandatory requirements.