1 . ACTION FOR FAILURE OF A MEMBER STATE TO FULFIL ITS OBLIGATIONS - PRE-LITIGATION PROCEDURE - PURPOSE ( EEC TREATY , ARTS 155 AND 169 ) 2 . PRIVILEGES AND IMMUNITIES OF THE EUROPEAN COMMUNITIES - OFFICIALS AND OTHER SERVANTS OF THE COMMUNITIES - EXEMPTION FROM THE FORMALITIES FOR THE REGISTRATION OF ALIENS - SCOPE - NATIONAL MEASURES IMPOSING AN INDIRECT CONSTRAINT TO REGISTER IN THE POPULATION REGISTERS - NOT PERMISSIBLE ( EEC TREATY , ART . 5 ; PROTOCOL ON THE PRIVILEGES AND IMMUNITIES OF THE EUROPEAN COMMUNITIES , ART . 12 ( B )) 3 . ACTION FOR FAILURE OF A MEMBER STATE TO FULFIL ITS OBLIGATIONS - NATIONAL MEASURES INCOMPATIBLE WITH COMMUNITY LAW - EXISTENCE OF REMEDIES UNDER NATIONAL LAW - NO EFFECT ON THE MAKING OF AN APPLICATION FOR FAILURE TO FULFIL AN OBLIGATION ( EEC TREATY , ART . 169 )