1 . COMMUNITY LAW - UNIFORM APPLICATION - CONCEPTS - DEFINITION - OBJECTIVE CRITERIA IN COMMUNITY CONTEXT 2 . SOCIAL SECURITY FOR MIGRANT WORKERS - SICKNESS AND MATERNITY BENEFITS - CONCEPT - DEFINITION - COMMUNITY CRITERIA - BENEFITS IN KIND UNDER LEGISLATION CONCERNING INVALIDITY - INCLUSION ( REGULATION NO 1408/71 OF THE COUNCIL , ART . 4 ( 1 ) ( A )) 3 . SOCIAL SECURITY FOR MIGRANT WORKERS - COMMUNITY RULES - OBJECT - NATIONAL LEGISLATION MORE FAVOURABLE THAN COMMUNITY RULES - PERMISSIBILITY ( EEC TREATY , ART . 51 ; REGULATION NO 1408/71 OF THE COUNCIL ) 4 . SOCIAL SECURITY FOR MIGRANT WORKERS - SICKNESS INSURANCE - RECIPIENT OF AN INVALIDITY PENSION RESIDING IN ANOTHER MEMBER STATE - POWER OF THE COMPETENT INSTITUTION TO GRANT BENEFITS OF A MEDICAL OR SURGICAL NATURE - POWER UNAFFECTED BY COMMUNITY RULES ( REGULATION NO 1408/71 OF THE COUNCIL , ARTS . 19 AND 28 ( 1 ))