C-261/81, Walter Rau [1982]
Key Points to Note in This Case
• Issue: Belgian law mandated that margarine be sold in cube-shaped blocks.
• Violation: This requirement was held to violate Article 34 TFEU.
• Principle of Mutual Recognition: The Court found that the Belgian law conflicted with the principle of mutual recognition, which allows goods produced in one Member State to be sold in all others, regardless of differing domestic regulations.