Court of Justice 4 July 1973, 13-73 (Anciens Etablissements D. Angenieux fils aîné and Caisse primaire centrale d'assurance maladie de la région parisienne v Willy Hakenberg.)

OPINION OF MR ADVOCATE-GENERAL TRABUCCHI DELIVERED ON 4 JULY 1973 ( 1 ) Mr President , Members of the Court, In this case, as already in many others concerned with interpretation of the provisions of Regulation No 3 on social security for migrant workers, the problem facing the national court and on which we are now called upon to give guidance, is that of determining what legislation to apply to