Rewe-Zentral v Bundesmonopolverwaltung für Branntwein (1979) Case C-120/78, popularly known as Cassis de Dijon after its subject matter, is an EU law decision of the European Court of Justice.

The ECJ held that the German legislation represented a measure having an effect equivalent to a quantitative restriction on imports and was thus in breach of article 34 of the Treaty: 8.

Obstacles to movement within the Community resulting from disparities between the national laws relating to the marketing of the products in question must be accepted in so far as those provisions may be recognized as being necessary in order to satisfy mandatory requirements relating in particular to the effectiveness of fiscal supervision, the protection of public health, the fairness of commercial transactions and the defence of the consumer.

The government of the Federal Republic of Germany, intervening in the proceedings, put forward various arguments which, in its view, justify the application of provisions relating to the minimum alcohol content of alcoholic beverages, adducing considerations relating on the one hand to the protection of public health and on the other to the protection of the consumer against unfair commercial practices.

As the Commission rightly observed, the fixing of limits in relation to the alcohol content of beverages may lead to the standardization of products placed on the market and of their designations, in the interests of a greater transparency of commercial transactions and offers for sale to the public.

Consequently, the first question should be answered to the effect that the concept of "measures having an effect equivalent to quantitative restrictions on imports" contained in Article 30 of the Treaty is to be understood to mean that the fixing of a minimum alcohol content for alcoholic beverages intended for human consumption by the legislation of a member state also falls within the prohibition laid down in that provision where the importation of alcoholic beverages lawfully produced and marketed in another member state is concerned.In 2010, Switzerland unilaterally adopted this principle: generally, goods that can be lawfully produced or marketed according to standards applying in the European Union can also be lawfully produced or marketed in Switzerland or imported from the EU into Switzerland.