ISLAMABAD: Justice Tasadduq Hussain Jilani sworn in as acting Chief Election Commissioner (CEC) Saturday here. Chief Justice of Pakistan Iftikhar Muhammad Chaudhry administered the oath to Justice Tasadduq Hussain Jilani in a ceremony held at the Supreme Court Lahore Registry. CEC slot had fallen vacant after premature resignation of Justice (retired) Fakhruddin G. Ibrahim.