council decis septemb amend decis ec extern auditor nation central bank extern auditor banca italia 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 juli council european union extern auditor banca italia account european central bank ecb nation central bank eurosystem audit independ extern auditor recommend govern council ecb approv council european union mandat current extern auditor banca italia expir renew appoint extern auditor financi year govern council ecb recommend council approv appoint start financi year renew period year extern auditor banca italia select accord public procur rule follow recommend govern council ecb amend decis ec decid articl articl decis ec replac pricewaterhousecoop spa approv extern auditor banca italia financi year renew period year articl decis notifi european central bank articl decis publish offici journal european union brussel septemb council presid bot oj oj decis amend decis ec oj