1 . REFERENCES FOR A PRELIMINARY RULING - JURISDICTION OF THE COURT - LIMITS ( EEC TREATY , ART . 177 ) 2 . SOCIAL SECURITY FOR MIGRANT WORKERS - OLD-AGE AND DEATH ( PENSIONS ) INSURANCE - BENEFITS DUE BY VIRTUE OF THE LEGISLATION OF A SINGLE MEMBER STATE - REDUCTION BY WAY OF AGGREGATION AND APPORTIONMENT - NOT PERMISSIBLE ( EEC TREATY , ART . 51 ; REGULATION NO 3 OF THE COUNCIL , ARTS . 27 AND 28 ) 3 . SOCIAL SECURITY FOR MIGRANT WORKERS - OLD-AGE AND DEATH ( PENSIONS ) INSURANCE - AGGREGATION OF INSURANCE PERIODS - RIGHTS TO BENEFITS RELATING TO PERIODS WHICH DO NOT OVERLAP - NO UNJUSTIFIED OVERLAPPING OF BENEFITS ( REGULATION NO 3 OF THE COUNCIL , ART . 27 ) 4 . SOCIAL SECURITY FOR MIGRANT WORKERS - OLD-AGE AND DEATH ( PENSIONS ) INSURANCE - RULE IN ARTICLE 28 ( 4 ) OF REGULATION NO 3 - SCOPE ( REGULATION NO 3 OF THE COUNCIL , ART . 28 ( 4 ))