TITJUR Opinion of Mr Advocate General Cosmas delivered on 23 March 1995. # Groupement National des Négociants en Pommes de Terre de Belgique v ITM Belgium SA and Vocarex SA. # Reference for a preliminary ruling: Tribunal de commerce de Mons - Belgium. # Free movement of goods - Prohibition of sales yielding very low profit margins. # Case C-63/94. Belgapom