Roma, April 11 - The Italian judiciary's self-governing body, the Supreme Council of Magistrates (CSM), on Thursday decided to appoint former Palermo prosecutor Antonio Ingroia as deputy prosecutor in the northwestern city of Aosta. Val d'Aosta is the only region in which Ingroia did not stand for elected office with his left-wing Civil Revolution party when he stepped aside from his role as magistrate to run in general elections at the end of February. Last month Ingroia denied that a proposal by the magistrates' self-governing body to post him to Aosta should he decide to return to the judiciary was ''a punishment'' for entering politics. The move, which saw the former anti-mafia prosecutor step down as head of a UN project on narcotraffic in Guatemala after just a few weeks, sparked controversy on grounds of alleged political bias within the magistrature. On Wednesday the CSM blocked plans for Ingroia to head a company that rakes in taxes on behalf of the government on the southern island of Sicily.