The current regions were established in July 1986 (the presidential decree officially establishing them was signed in 1987), by decision of the interior minister,Menios Koutsogiorgas, as second-level administrative entities, complementing theprefectures (Law 1622/1986).[1] Before 1986, there was a traditional division into broadhistorical–geographical regions (γεωγραφικά διαμερίσματα), which, however, was often arbitrary; not all of the pre-1986 traditional historical-geographic regions had official administrative bodies. Although the post-1986 regions were mostly based on the earlier divisions, they are usually smaller and, in a few cases, do not overlap with the traditional definitions: for instance, the region ofWestern Greece, which had no previous analogue, comprises territory belonging to thePeloponnese peninsula and the traditional region ofCentral Greece.
As part of adecentralization process inspired by Interior MinisterAlekos Papadopoulos, they were accorded more powers in the 1997Kapodistrias reform of local and regional government. They were transformed into fully separate entities by the 2010Kallikratis Plan (Law 3852/2010), which entered into effect on 1 January 2011. In the 2011 changes, the government-appointed general secretary (γενικός γραμματέας) was replaced with a popularly elected regional governor (περιφερειάρχης) and a regional council (περιφερειακό συμβούλιο) with five-year terms. Many powers of the prefectures, which were also abolished or reformed intoregional units, were transferred to the region level. The regional organs of the central government were in turn replaced by sevendecentralized administrations, which group from one to three regions under a government-appointed general secretary.