Since 2012 Chad has been divided into 23 regions. The subdivision of Chad in regions came about in 2003 as part of the decentralisation process, when the government abolished the previous 14 prefectures. Each region is headed by a presidentially appointed governor. Prefects administer the 61 departments within the regions. The departments are divided into 200 sub-prefectures, which are in turn composed of 446 cantons.