CEO Sifiso Dabengwa and 12 officials including the chairperson and CEO of MTN's Ugandan unit must appear in court on December 12 when they will also face charges of tax evasion, conspiracy to make false customs declarations and conspiracy to evade taxes, according to a November 7 summons issued by the Buganda Road Court.MTN's website says a former worker, Naphtal Were, initiated the charges.