++++ 1 . PRELIMINARY RULINGS - EFFECTS OF A NATIONAL LAW IN RELATION TO COMMUNITY LAW - POWERS OF THE COURT - LIMITS ( EEC TREATY, ARTICLE 177 ) 2 . SOCIAL SECURITY FOR MIGRANT WORKERS - APPLICATION TO NATIONAL LEGISLATIVE SYSTEMS - EXTENSION TO PROPHYLACTIC AND REMEDIAL MEASURES ( REGULATION NO 3 OF THE COUNCIL, ARTICLE 2 ( 1 )) 3 . SOCIAL SECURITY FOR MIGRANT WORKERS - SICKNESS BENEFITS - CONCEPT - ACQUISITION OF THE RIGHT BY AGGREGATION OF THE INSURANCE PERIODS COMPLETED ( REGULATION NO 3 OF THE COUNCIL, ARTICLE 2, ARTICLE 16 )