council decis juli approv extern auditor european central bank ec council european union regard protocol statut european system central bank european central bank articl thereof regard recommend govern council european central bank hereinaft refer ecb june account ecb nation central bank audit independ extern auditor recommend govern council approv council european union govern council ecb recommend cooper lybrand extern auditor ecb decid articl cooper lybrand approv extern auditor ecb articl decis notifi ecb articl decis publish offici journal european commun brussel juli council presid molter