council decis march amend decis ec extern auditor nation central bank extern auditor österreichisch nationalbank ec council european union regard protocol statut european system central bank european central bank annex treati establish european commun articl thereof regard recommend ecb european central bank februari council european union extern auditor österreichisch nationalbank account european central bank ecb nation central bank eurosystem audit independ extern auditor recommend govern council ecb approv council european union pursuant articl feder act österreichisch nationalbank gener meet österreichisch nationalbank önb elect auditor altern auditor year altern auditor mandat event auditor perform audit mandat current extern auditor önb renew term offic audit financi year appoint extern auditor financi year önb select kpmg alpen treuhand gmbh tpa horwath wirtschaftsprüfung gmbh moor stephen austria wirtschaftsprüfungsgesellschaft mbh bdo auxilia treuhand gmbh extern auditor accord commun austrian public procur legisl ecb consid fulfil requir appoint govern council ecb recommend mandat extern auditor renew yearli basi exceed total term year follow recommend govern council ecb amend council decis ec decid articl articl decis ec replac quot kpmg alpen treuhand gmbh tpa horwath wirtschaftsprüfung gmbh approv jointli extern auditor österreichisch nationalbank önb financi year moor stephen austria wirtschaftsprüfungsgesellschaft mbh bdo auxilia treuhand gmbh approv jointli altern auditor önb financi year mandat renew yearli basi exceed total term year end financi year latest quot articl decis notifi european central bank articl decis publish offici journal european union brussel march council presid grasser oj oj decis amend decis ec oj