Case 301/82: Reference for a preliminary ruling by the Conseil d'Etat of the Kingdom of Belgium (Administrative Section, Third Chamber) by judgment of that court of 22 October 1982 in the case 1. 'Clin-Midy' SA; 2. Cob et Co., SA; 3. Etablissements A. Couvreur SA; 4. Laboratoires Covor SA; 5. Etablissements Dergo SA; 6. Divapharma SA; 7. Frere & Cie. SA; 8. Laboratoria Mann; 9. Merck SA; 10. Pharmathetic SA; 11. Etablissements L. Prunieres SA; 12. Laboratoires Robert & Carriere SA; 13. Theraplix SA; 14. Laboratoires Pharmaceutiques R. H. Trenker SA; v. Belgian State, represented by the Minister for Economic Affairs