1 . SOCIAL SECURITY FOR MIGRANT WORKERS - INVALIDITY - PENSION - ARTICLES 27 AND 28 OF REGULATION NO 3 - APPLICATION BY ANALOGY - BENEFITS - APPORTIONMENT - CONDITION - AGGREGATION OF INSURANCE PERIODS COMPLETED UNDER DIFFERENT LEGISLATIONS ( REGULATION NO 3 OF THE COUNCIL , ARTS . 26 ( 1 ), 27 AND 28 ) 2 . SOCIAL SECURITY FOR MIGRANT WORKERS - BENEFITS - OVERLAPPING - NATIONAL LEGISLATIONS - PROVISIONS FOR THE REDUCTION OR SUSPENSION OF BENEFIT - PRECLUSION - CONDITIONS ( REGULATION NO 3 OF THE COUNCIL , ART . 11 ( 2 )) 3 . SOCIAL SECURITY FOR MIGRANT WORKERS - BENEFITS - OVERLAPPING - NATIONAL LEGISLATIONS - APPLICATION OF A PROVISION FOR THE REDUCTION OR SUSPENSION OF BENEFIT - CALCULATION OF BENEFITS - ARTICLE 9 ( 2 ) OF REGULATION NO 4 - CONDITIONS FOR ITS APPLICATION ( REGULATION NO 4 OF THE COUNCIL , ART . 9 ( 2 ))