Article 72 of the Constitution classifies laws as either constitutional, organic or ordinary. Constitutional laws revise the Constitution and must be started by popular initiative, or by either one-third of the Parliament or the Government. Organic laws control a range of matters specified in Article 72(3), including electoral matters. Organic laws must be passed by majority vote based on at least two ballots (Article 74(1)). Ordinary laws are passed by a majority vote of present deputies.