1 . SOCIAL SECURITY FOR MIGRANT WORKERS - COMMUNITY RULES - MATERIAL SCOPE - BENEFITS COVERED AND BENEFITS EXCLUDED - DISTINGUISHING CRITERIA - SOCIAL BENEFIT GUARANTEEING A MINIMUM MEANS OF SUBSISTENCE - EXCLUDED ( REGULATION NO 1408/71 OF THE COUNCIL , ART . 4 ( 1 )) 2 . FREEDOM OF MOVEMENT FOR PERSONS - WORKERS - EQUAL TREATMENT - SOCIAL ADVANTAGES - CONCEPT - SOCIAL BENEFIT GUARANTEEING A MINIMUM MEANS OF SUBSISTENCE - GRANT TO NATIONALS OF OTHER MEMBER STATES - REQUIREMENT OF CERTAIN PERIOD OF RESIDENCE - NOT PERMISSIBLE ( REGULATION NO 1612/68 OF THE COUNCIL , ART . 7 ( 2 ))