1 . FREEDOM OF MOVEMENT FOR PERSONS - WORKERS - REGULATION ( EEC ) NO 1612/68 OF THE COUNCIL - PURPOSE - CREATION OF RIGHTS BY VIRTUE OF INSURANCE PERIODS COMPLETED IN ANOTHER MEMBER STATE - EXCLUSION ( REGULATION ( EEC ) NO 1612/68 OF THE COUNCIL ) 2 . SOCIAL SECURITY FOR MIGRANT WORKERS - AFFILIATION TO A SOCIAL SECURITY SCHEME - CONDITIONS - APPLICATION OF NATIONAL LAW - LEGISLATION MAKING AFFILIATION CONDITIONAL ON THE COMPLETION OF INSURANCE PERIODS - INSURANCE PERIODS COMPLETED IN ANOTHER MEMBER STATE TREATED AS EQUIVALENT TO THOSE COMPLETED ON NATIONAL TERRITORY - DUTY OF THE MEMBER STATES - NONE ( REGULATION ( EEC ) NO 1408/71 OF THE COUNCIL , ARTS 1 ( A ) AND 3 )