council decis april amend decis ec extern auditor nation central bank extern auditor deutsch bundesbank ec council european union regard statut european system central bank european central bank ecb articl thereof regard recommend ecb march account ecb nation central bank audit independ extern auditor recommend govern council ecb approv council european union govern council ecb recommend council approv appoint start financi year extern auditor deutsch bundesbank addit continu mandat extern auditor approv virtu decis ec follow recommend govern council ecb decid articl articl decis ec replac quot pwc deutsch revis ag ernst amp young deutsch allgemein treuhand ag approv extern auditor deutsch bundesbank financi year renew period year quot articl decis notifi ecb articl decis publish offici journal european union luxembourg april council presid dry oj decis amend decis ec oj