 However this facility has not been exercised much, possibly due to the difficulty of gathering evidence to prove such a breach.Regulation 1/2003 of the European Commission sought to increase private and public enforcement of EC rules in national courts to allow the commission to concentrate on bigger cases.The CCPC operates a Cartel Immunity Programme which allows for immunity or leniency in sentencing for offenders which supply information to them that allows the prosecution of other breaches of the law.