1 . SOCIAL SECURITY FOR MIGRANT WORKERS - AFFILIATION TO A SOCIAL SECURITY SCHEME - CONDITIONS - APPLICATION OF NATIONAL LAW - DISCRIMINATION ON GROUNDS OF NATIONALITY - PROHIBITION 2 . SOCIAL SECURITY FOR MIGRANT WORKERS - OLD-AGE AND DEATH INSURANCE - SPECIAL RULES CONCERNING THE APPLICATION OF NETHERLANDS LEGISLATION ON GENERAL OLD-AGE INSURANCE - CALCULATION OF PERIODS OF INSURANCE - TAKING INTO ACCOUNT OF CERTAIN PERIODS COMPLETED BY THE RECIPIENT ' S WIFE BEFORE 1 JANUARY 1957 - PERIODS PRIOR TO THE MARRIAGE DURING WHICH SHE NEITHER RESIDED NOR PURSUED AN ACTIVITY AS AN EMPLOYED PERSON IN THE NETHERLANDS - EXCLUSION ( EEC TREATY , ART . 51 ; COUNCIL REGULATION NO 1408/71 , ANNEX VI , PART I , POINT 2 ( C ))