1 . SOCIAL SECURITY FOR MIGRANT WORKERS - BENEFITS - OVERLAPPING - RIGHT ACQUIRED BY VIRTUE OF NATIONAL LEGISLATION ALONE - APPLICABILITY OF NATIONAL RULES AGAINST OVERLAPPING - LIMITS - COMMUNITY RULES MORE FAVOURABLE TO THE WORKER ( REGULATION ( EEC ) NO 1408/71 OF THE COUNCIL , ART . 12 ( 2 ) AND ART . 46 ) 2 . SOCIAL SECURITY FOR MIGRANT WORKERS - BENEFITS - NATIONAL RULES AGAINST OVERLAPPING - INAPPLICABILITY TO RECIPIENTS OF BENEFITS OF THE SAME KIND AWARDED IN ACCORDANCE WITH THE PROVISIONS OF REGULATION ( EEC ) NO 1408/71 - INVALIDITY BENEFITS CONVERTED INTO AN OLD-AGE PENSION AND INVALIDITY BENEFITS NOT CONVERTED - ASSIMILATION TO BENEFITS OF THE SAME KIND ( REGULATION ( EEC ) NO 1408/71 OF THE COUNCIL , ART . 12 ( 2 ) AND CHAPTER 3 ) 3 . SOCIAL SECURITY FOR MIGRANT WORKERS - BENEFITS - NATIONAL RULES AGAINST OVERLAPPING - INAPPLICABILITY TO RECIPIENTS OF BENEFITS OF THE SAME KIND AWARDED IN ACCORDANCE WITH THE PROVISIONS OF REGULATION ( EEC ) NO 1408/71 - CALCULATION OF THE AMOUNT REFERRED TO IN ARTICLE 46 ( 1 ) - TAKING ACCOUNT OF A PENSION DUE UNDER THE LEGISLATION OF ANOTHER MEMBER STATE - NOT PERMISSIBLE ( REGULATION ( EEC ) NO 1408/71 OF THE COUNCIL , ART . 12 ( 2 ) AND ART . 46 ( 1 )) 4 . SOCIAL SECURITY FOR MIGRANT WORKERS - AGGREGATION AND APPORTIONMENT - COMMUNITY RULES - APPLICATION OF NATIONAL RULES LESS FAVOURABLE TO THE WORKER - NOT PERMISSIBLE ( REGULATION ( EEC ) NO 574/72 OF THE COUNCIL , ARTS 15 AND 46 )