1 . PRIVILEGES AND IMMUNITIES OF THE EUROPEAN COMMUNITIES - MEMBERS OF THE EUROPEAN PARLIAMENT - IMMUNITY ' DURING THE SESSIONS OF THE ASSEMBLY ' - MEANING OF THE TERM ' SESSION ' - INTERPRETATION - REFERENCE TO NATIONAL LAW - NOT PERMISSIBLE ( PROTOCOL ON THE PRIVILEGES AND IMMUNITIES OF THE EUROPEAN COMMUNITIES , ART . 10 ) 2 . EUROPEAN PARLIAMENT - ANNUAL SESSIONS - DURATION - DETERMINATION - POWER TO ADOPT RULES FOR ITS OWN INTERNAL ORGANIZATION ( ECSC TREATY , ARTS 22 AND 25 ; EEC TREATY , ARTS 139 AND 142 ; EAEC TREATY , ARTS 109 AND 112 ; MERGER TREATY , ART . 27 ) 3 . PRIVILEGES AND IMMUNITIES OF THE EUROPEAN COMMUNITIES - MEMBERS OF THE EUROPEAN PARLIAMENT - IMMUNITY ' DURING THE SESSIONS OF THE ASSEMBLY ' - MEANING OF THE TERM ' SESSION ' ( ECSC TREATY , ART . 22 ; EEC TREATY , ART . 139 ; EAEC TREATY , ART . 109 ; PROTOCOL ON THE PRIVILEGES AND IMMUNITIES OF THE EUROPEAN COMMUNITIES , ART . 10 )