SEOUL, The head of the broadcasting regulator voluntarily stepped down Tuesday, as opposition parties are set to vote on an impeachment motion against him, a source close to the matter said. Kim Hong-il, chair of the Korea Communications Commission (KCC), is scheduled to attend his retirement ceremony while skipping a Cabinet meeting later in the day, according to the source. Kim's move comes amid the main opposition Democratic Party's plan to railroad an impeachment motion against him before Thursday. Last week, the KCC approved a plan to appoint new board members for a controlling shareholder of a public broadcaster and two other public broadcasters. The three public broadcasters are Munhwa Broadcasting Corp., Korean Broadcasting System and Korea Educational Broadcasting System. Source: Yonhap News Agency