There are also three administrative subdivisions, simply known as subdivisions in French, with exactly the same names and same boundaries as the three provinces, except that the commune of Poya is entirely contained inside the North Subdivision. Contrary to the provinces, which are full political divisions with provincial assemblies and executives, the administrative subdivisions are merely deconcentrated divisions of the French central state, akin to the arrondissements of metropolitan France, with a Deputy Commissioner of the Republic ( commissaire délégué de la République ), akin to a subprefect of metropolitan France, in residence in each subdivision's chief town.The subdivision chief towns are the same as the provincial capitals except in the South Subdivision where the chief town is La Foa, whereas the capital of the South Province is Nouméa. Thus, although the provincial assembly of the South Province sits in Nouméa, the South Subdivision's Deputy Commissioner of the Republic is in residence in La Foa. This was decided in order to counterbalance the overwhelming weight of Nouméa in New Caledonia. In addition, a parallel layer of administration exists for Kanak tribal affairs;these are called aires coutumières ("traditional spheres") and are eight in number (see map of the "aires coutumières"). Their jurisdiction does not encompass non-Kanaks living within these zones. The aires coutumières more or less correspond to the indigenous language areas of pre-French tribal alliances.