1 . SOCIAL SECURITY FOR MIGRANT WORKERS - BENEFITS - OVERLAPPING - BENEFITS CORRESPONDING TO AN INSURANCE PERIOD BOUGHT IN VOLUNTARILY BY THE PERSON CONCERNED - APPLICATION OF ARTICLE 46 ( 2 ) OF REGULATION NO 574/72 OF THE COUNCIL 2 . SOCIAL SECURITY FOR MIGRANT WORKERS - BENEFITS - OVERLAPPING - ENTITLEMENT UNDER NATIONAL LEGISLATION ALONE - PROVISIONS FOR REDUCTION OR SUSPENSION OF BENEFIT - APPLICABILITY - POSITION UNDER COMMUNITY RULES MORE FAVOURABLE - PREFERENCE ( REGULATION NO 1408/71 OF THE COUNCIL , ARTS . 12 ( 2 ) AND 46 )